U.S. patent application number 15/271091 was filed with the patent office on 2017-08-10 for in vitro prediction of in vivo half-life.
This patent application is currently assigned to Hoffmann-La Roche Inc.. The applicant listed for this patent is Hoffmann-La Roche Inc.. Invention is credited to Thomas Emrich, Hubert Kettenberger, Tilman Schlothauer, Angela Schoch.
Application Number | 20170227547 15/271091 |
Document ID | / |
Family ID | 52684232 |
Filed Date | 2017-08-10 |
United States Patent
Application |
20170227547 |
Kind Code |
A1 |
Emrich; Thomas ; et
al. |
August 10, 2017 |
IN VITRO PREDICTION OF IN VIVO HALF-LIFE
Abstract
Herein is reported a method for determining the presence of
antibody-Fab-FcRn interaction in an antibody-Fc-FcRn complex
influencing the in vivo half-life comprising the steps of a)
determining the retention time of the antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a first sodium chloride concentration, and b)
determining the retention time of the antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second sodium chloride concentration, whereby the
presence of antibody-Fab-FcRn interaction in an antibody-Fc-FcRn
complex influencing the in vivo half-life is determined if the
retention time determined in step a) and the retention time
determined in step b) are substantially different.
Inventors: |
Emrich; Thomas; (Iffeldorf,
DE) ; Kettenberger; Hubert; (Muenchen, DE) ;
Schlothauer; Tilman; (Penzberg, DE) ; Schoch;
Angela; (Muenchen, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Hoffmann-La Roche Inc. |
Little Falls |
NJ |
US |
|
|
Assignee: |
Hoffmann-La Roche Inc.
Little Falls
NJ
|
Family ID: |
52684232 |
Appl. No.: |
15/271091 |
Filed: |
September 20, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
PCT/EP2015/055482 |
Mar 17, 2015 |
|
|
|
15271091 |
|
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G01N 33/6854 20130101;
C07K 2317/94 20130101; C07K 16/00 20130101; B01D 15/3809 20130101;
B01D 15/168 20130101; C07K 2317/52 20130101 |
International
Class: |
G01N 33/68 20060101
G01N033/68; B01D 15/38 20060101 B01D015/38; B01D 15/16 20060101
B01D015/16 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 21, 2014 |
EP |
14161103.8 |
Apr 25, 2014 |
EP |
14165987.0 |
Claims
1-18. (canceled)
19. A method for selecting an antibody comprising the following
steps: i) determining a first retention time of the antibody and a
reference antibody on an FcRn affinity chromatography column with a
positive linear pH gradient elution in the presence of a first salt
concentration, and determining a second retention time of the
antibody and the reference antibody on an FcRn affinity
chromatography column with the positive linear pH gradient elution
in the presence of a second salt concentration, or ii) determining
a first retention time of the antibody and a reference antibody on
an FcRn affinity chromatography column with a linear salt gradient
elution at a first pH value, and determining a second retention
time of the antibody and the reference antibody on an FcRn affinity
chromatography column with the linear salt gradient elution at a
second pH value, or iii) determining for the antibody and a
reference antibody the K.sub.D value at pH 6 using surface plasmon
resonance, and determining the retention time of the antibody and
the reference antibody on an FcRn affinity chromatography column
with a positive linear pH gradient elution in the presence of a
high salt concentration, or iv) determining for the antibody and a
reference antibody the K.sub.D value at pH 6 using surface plasmon
resonance, and determining the retention time of the antibody and
the reference antibody on an FcRn affinity chromatography column
with a linear salt gradient elution, or v) determining the
retention time of the antibody and its Fc-region on an FcRn
affinity chromatography column with a positive linear pH gradient
elution, or vi) determining the retention time of the antibody and
its Fc-region on an FcRn affinity chromatography column with a
linear salt gradient elution at a high pH value, or vii)
determining for the antibody and its Fc-region the K.sub.D value at
pH 6 using surface plasmon resonance, and determining the retention
time of the antibody and its Fc-region on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration, or viii) determining for
the antibody and its Fc-region the K.sub.D value at pH 6 using
surface plasmon resonance, and determining the retention time of
the antibody and its Fc-region on an FcRn affinity chromatography
column with a linear salt gradient elution at a high pH value, and
by selecting a) an antibody that has a first retention time that is
substantially the same as the second retention time, or b) an
antibody that has a K.sub.D value that differs from the K.sub.D
value of the reference antibody by at most a factor of 10 and that
has a retention time that is substantially the same as the
retention time of the reference antibody, or c) an antibody that
has a retention time that is substantially the same as the
retention time of its Fc-region, or d) an antibody that has a
K.sub.D value that differs from the K.sub.D value of its Fc-region
by at most a factor of 10 and that has a retention time that is
substantially the same as the retention time of its Fc-region.
20. The method of claim 19, wherein the method is for selecting an
antibody that is free of antibody-Fab-FcRn interaction influencing
the in vivo half-life of the antibody.
21. The method of claim 19, wherein the method is for selecting an
antibody that has a relative in vivo half-life that is increased
compared to an antibody of the IgG1, IgG3, or IgG4 subclass, and in
v), vi), vii) and viii) further the retention time of a reference
antibody or reference Fc-region is determined, and by selecting a)
an antibody that has a first retention time that is longer than the
first retention time of the reference antibody, and a first
retention time that is substantially the same as the second
retention time, or b) an antibody that has a K.sub.D value that
differs from the K.sub.D value of the reference antibody by at most
a factor of 10 and that has a retention time that is longer than
the retention time of the reference antibody, or c) an antibody
that has a retention time that is substantially the same as the
retention time of its Fc-region and that is longer than the
retention time of the reference antibody, or d) an antibody that
has a K.sub.D value that differs from the K.sub.D value of its
Fc-region by at most a factor of 10 and that has a retention time
that is substantially the same as the retention time of its
Fc-region and that is longer than the retention time of the
reference antibody.
22. The method of claim 19, wherein the method is for determining
the relative increase or decrease in the in vivo half-life of an
antibody to a reference antibody, and in v), vi), vii) and viii)
further the retention time of a reference antibody or reference
Fc-region is determined, and in i) to viii) further the retention
time of an IgG Fc-region with the mutation N434A is determined, and
by selecting a) an antibody that has a first retention time that is
longer than the first retention time of the reference, that has a
first retention time and a second retention time that are
substantially the same, and that has a first retention time that is
shorter than the retention time of the Fc-region with the mutation
N434A and thereby selecting an antibody with increased in vivo
half-life, or b) an antibody that has a K.sub.D value that differs
from the K.sub.D value of the reference antibody by at most a
factor of 10, that has a retention time that is longer than the
retention time of the reference antibody and that has a first
retention time that is shorter than the retention time of the
Fc-region with the mutation N434A and thereby selecting an antibody
with increased in vivo half-life, or c) an antibody that has a
first retention time that is shorter than the first retention time
of the reference antibody, and that has a first retention time and
a second retention time that are substantially the same, and
thereby selecting an antibody with decreased in vivo half-life, or
d) an antibody that has a K.sub.D value that differs from the
K.sub.D value of the reference antibody by at most a factor of 10,
and that has a retention time that is shorter than the retention
time of the reference antibody, and thereby selecting an antibody
with increased in vivo half-life.
23. The method of claim 19, wherein the positive linear pH gradient
is from about pH 5.5 to about pH 8.8.
24. The method of claim 19, wherein the salt is sodium
chloride.
25. The method of claim 19, wherein the first salt concentration is
about 140 mM.
26. The method of claim 19, wherein the second salt concentration
is about 400 mM.
27. The method of claim 19, wherein the linear salt gradient is
from 0 mM salt to 250 mM salt.
28. The method of claim 19, wherein the first pH value is about
5.5.
29. The method of claim 19, wherein the second pH value is about
7.4.
30. The method of claim 19, wherein the high salt concentration is
about 400 mM.
31. The method of claim 19, wherein the high pH value is about pH
7.4.
32. The method of claim 19, wherein the substantially different
retention times differ by at least 5%.
33. The method of claim 19, wherein the substantially same
retention times differ by 3.5% or less.
34. The method of claim 19, wherein if the retention times are
substantially different, the retention times are proportional to
one above the square root of the salt concentration
(1/SQRT(c(salt))).
35. The method of claim 19, wherein the antibody is a full-length
antibody.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is a continuation of International
Application No. PCT/EP2015/055482 having an international filing
date of Mar. 17, 2015, the entire contents of which are
incorporated herein by reference, and which claims benefit under 35
U.S.C. .sctn.119 to European Patent Application No. 14161103.8
filed on Mar. 21, 2014 and European Patent Application No.
14165987.0 filed on Apr. 25, 2014.
SEQUENCE LISTING
[0002] The instant application contains a Sequence Listing
submitted via EFS-Web and hereby incorporated by reference in its
entirety. Said ASCII copy, created on Sep. 20, 2016, is named
P32047US_SeqList.txt, and is 93,656 bytes in size.
FIELD OF THE INVENTION
[0003] The current invention is in the field of recombinant
antibody technology, especially in the field of tailor made
antibodies. Herein is reported a method for the prediction of the
in vivo half-life of an antibody based on the retention time
determined on an FcRn affinity chromatography column.
BACKGROUND OF THE INVENTION
[0004] Human immunoglobulins of the class G (IgGs) contain two
antigen binding (Fab) regions that convey specificity for the
target antigen and a constant region (Fc-region) that is
responsible for interactions with Fc receptors ([1,2]). Human IgGs
of subclasses 1, 2 and 4 have an average serum half-life of 21
days, which is longer than that of any other known serum protein
([3]). This long half-life is predominantly mediated by the
interaction between the Fc-region and the neonatal Fc receptor
(FcRn) ([4,5]). This is one of the reasons, why IgGs or
Fc-containing fusion proteins are used as a widespread class of
therapeutics.
[0005] The neonatal Fc receptor FcRn is a membrane-associated
receptor involved in both IgG and albumin homeostasis, in maternal
IgG transport across the placenta and in antigen-IgG immune complex
phagocytosis ([6,9]). Human FcRn is a heterodimer consisting of the
glycosylated class I major histocompatibility complex-like protein
(.alpha.-FcRn) and a .beta..sub.2 microglobulin (.beta..sub.2m)
subunit ([10]). FcRn binds to a site in the C.sub.H2-C.sub.H3
region of the Fc-region ([11-14]) and two FcRn molecules can bind
to the Fc-region simultaneously ([15,16]). The affinity between the
FcRn and the Fc-region is pH dependent, showing nanomolar affinity
at endosomal pH of 5-6 and negligible binding at a physiological pH
of 7.4 ([13,17,18]). The underlying mechanism conveying long
half-life to IgGs can be explained by three fundamental steps.
First, IgGs are subject to unspecific pinocytosis by various cell
types ([19,20]). Second, IgGs encounter and bind FcRn in the acidic
endosome at a pH of 5-6, thereby protecting IgGs from lysosomal
degradation ([11,21]). Finally, IgGs are released in the
extracellular space at physiological pH of 7.4 [4]. This strict
pH-dependent bind-and-release mechanism is critical for IgG
recycling and any deviation of the binding characteristics at
different pH values may strongly influence circulation half-life of
IgGs ([22]).
[0006] The Fab regions have also been suggested to contribute to
FcRn binding ([23-25]), in addition to the specific interaction of
the Fc-region with FcRn. For example, Fab-mediated residual binding
at neutral pH was correlated with the pharmacokinetic properties of
a set of therapeutic antibodies, indicating that IgGs with
excessive binding to FcRn at pH 7.3 suffer from reduced terminal
half-life ([24]). Recently, Schlothauer et al. ([25]) have
described a novel pH-gradient FcRn affinity chromatography method
that closely mimics physiological conditions for the dissociation
between FcRn and IgGs. Furthermore, they showed that IgGs with
identical Fc-regions differ in their dissociation from FcRn,
thereby indicating the influence of the Fab region on FcRn
binding.
[0007] However, the underlying mechanism how the Fab region
influences FcRn binding is still not elucidated.
[0008] Analytical FcRn affinity chromatography for functional
characterization of monoclonal antibodies is reported by
Schlothauer, T., et al. ([25]). Wang, W., et al. ([24]) report
monoclonal antibodies with identical Fc sequences can bind to FcRn
differentially with pharmacokinetic consequences. Importance of
neonatal FcR in regulating the serum half-life of therapeutic
proteins containing the Fc domain of human IgG1 is reported by
Suzuki, T., et al. ([23]). Igawa, T., et al. ([37]) report reduced
elimination of IgG antibodies by engineering the variable region.
Engineering the Fc-region of immunoglobulins G to modulate in vivo
antibody levels is reported by Vaccaro, C., et al. ([22]). Prabhat,
P., et al. ([40]) report elucidation of intracellular recycling
pathways leading to exocytosis of the Fc receptor, FcRn, by using
multifocal plane microscopy. Pharmacokinetic, pharmacodynamic and
immunogenicity comparability assessment strategies for monoclonal
antibodies is reported by Putnam, W. S., et al. ([36]). Boswell, C.
A., et al. ([38]) report effects of charge on antibody tissue
distribution and pharmacokinetics. Pharmacokinetic characteristics
and biodistribution of radioiodinated chimeric TNT-1, -2, and -3
monoclonal antibodies after chemical modification with biotin is
reported by Khawli, L. A., et al. ([35]).
[0009] In WO 2013/120929 Fc-receptor based affinity chromatography
is reported. In US 2011/0111406 a method for binding
antigen-binding molecules to the antigens multiple times is
reported. In US 2014/0013456 histidine engineered light chain
antibodies and genetically modified non-human animals for
generating the same are reported.
[0010] The influence of the Fab region on FcRn interactions has
recently been discussed ([23,24,25]).
[0011] However, antibodies having the same Fc-regions do not simply
have to have a similar PK profile. An additional contribution of
the Fab region to FcRn binding has been reported, but the
underlying mechanism remained unknown ([47], [24], [25]).
[0012] In addition to the specific interaction of the Fc region
with FcRn, the Fab regions have also been suggested to contribute
to the FcRn-IgG interaction ([37,24,25]).
[0013] Post published Li, B., et al. ([48]) report that framework
selection can influence pharmacokinetics of a humanized therapeutic
antibody through differences in molecule charge.
[0014] Sampei, Z., et al. ([49]) report identification and
multidimensional optimization of an asymmetric bispecific IgG
antibody mimicking the function of factor VIII cofactor
activity.
[0015] Wang et al. ([24]) reported that IgGs with different target
specificities and Fab regions but identical Fc sequences can have
different FcRn affinities. Fab-mediated residual binding at near
physiological pH was correlated with the pharmacokinetic properties
of a set of therapeutic antibodies indicating that IgGs with
excessive binding to FcRn at pH 7.3 suffer from reduced terminal
half-lives.
[0016] Recently, Schlothauer et al. ([25]) have described a novel
pH-gradient FcRn affinity chromatography method that closely mimics
physiological conditions for the dissociation between FcRn and IgG.
Furthermore, they showed that IgGs with identical Fc regions differ
in their dissociation from FcRn in vitro, thereby indicating the
influence of the Fab region on FcRn-IgG interaction.
[0017] Benson, J. M., et al. ([50]) report the discovery and
mechanism of Ustekinumab: A human monoclonal antibody targeting
interleukin-12 and interleukin-23 for treatment of immunmediated
disorders.
[0018] The amino acid sequences of the antibody Briakinumab are
reported in WO 2013/087911 (SEQ ID NO: 39 and SEQ ID NO: 40), of
the antibody Ustekinumab in WO 2013/087911 (SEQ ID NO: 37 and SEQ
ID NO: 38) and of the antibody Bevacizumab in Drug Bank entry
DB00112.
SUMMARY OF THE INVENTION
[0019] It has been found that the charge distribution in the Fv
domain influences antibody-FcRn binding and results in additional
interactions between the antibody and the FcRn. This changes the
FcRn binding characteristics, especially with respect to the
dissociation of the antibody-FcRn complex at pH 7.4, thereby
reducing FcRn-dependent terminal half-life of the antibody.
[0020] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction influencing the in
vivo half-life of the antibody comprising the following steps:
[0021] a) determining the retention time of the antibody on an FcRn
affinity chromatography column with a positive linear pH gradient
elution in the presence of a first salt concentration, [0022] b)
determining the retention time of the antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0023] whereby the presence of antibody-Fab-FcRn interaction
influencing the in vivo half-life of the antibody is determined if
the retention time determined in step a) and the retention time
determined in step b) are substantially different.
[0024] The antibody-Fab-FcRn interaction is an interaction between
the Fab-region of an antibody with the FcRn. This interaction
occurs, if present at all, after the antibody has been bound by the
FcRn. Thus, the establishment of this interaction is a two-step
process. In the first step an antibody-FcRn complex, to be more
precise an antibody-Fc-FcRn complex, is formed. The second step
after the antibody-Fc-FcRn complex has been formed is the
establishment of the antibody-Fab-FcRn interaction. As can be seen
from this, only with a full-length antibody these two interactions,
i.e. the antibody-Fc-FcRn interaction and the antibody-Fab-FcRn
interaction, can be established.
[0025] One aspect as reported herein is a method for determining
the presence of Fab-FcRn interaction in an antibody-FcRn complex
influencing the in vivo half-life comprising the following steps:
[0026] a) determining the retention time of the antibody on an FcRn
affinity chromatography column with a positive linear pH gradient
elution in the presence of a first salt concentration, [0027] b)
determining the retention time of the antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0028] whereby the presence of Fab-FcRn interaction in an
antibody-FcRn complex influencing the in vivo half-life is
determined if the retention time determined in step a) and the
retention time determined in step b) are substantially
different.
[0029] Another aspect as reported herein is a method for
determining the relative in vivo half-life of an antibody
comprising the following steps: [0030] a) determining the retention
time of the antibody on an FcRn affinity chromatography column with
a positive linear pH gradient elution in the presence of a first
salt concentration, [0031] b) determining the retention time of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of a second salt
concentration,
[0032] whereby the antibody has a relative in vivo half-life that
is reduced compared to a standard/natural antibody of the IgG class
if the retention time determined in step a) and the retention time
determined in step b) are substantially different.
[0033] In one embodiment the antibody of the IgG class is an
antibody of the IgG1, IgG2, IgG3 or IgG4 subclass. In one
embodiment the antibody of the IgG class is an antibody of the
IgG1, IgG3 or IgG4 subclass. In one embodiment the antibody of the
IgG class is an antibody of the IgG1 or IgG4 subclass. In one
embodiment the antibody of the IgG class is an antibody of the IgG1
subclass. In one embodiment the antibody of the IgG class is an
antibody of the IgG4 subclass.
[0034] A further aspect as reported herein is a method for
determining an increase or a decrease in the vivo half-life of a
variant antibody relative to its parent antibody comprising the
following steps: [0035] a) determining the retention time of the
variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a first salt concentration, [0036] b) determining
the retention time of the variant antibody and its parent antibody
on an FcRn affinity chromatography column with a positive linear pH
gradient elution in the presence of a second salt
concentration,
[0037] whereby the in vivo half-life of the variant antibody
relative to its parent antibody is increased if i) the retention
time of the variant antibody determined in step a) is longer than
the retention time of its parent antibody determined in step a),
and ii) the retention time of the variant antibody determined in
step a) and the retention time of the variant antibody determined
in step b) are substantially the same, whereby the in vivo
half-life of the variant antibody relative to its parent antibody
is decreased if i) the retention time of the variant antibody
determined in step a) is shorter than the retention time of its
parent antibody determined in step a), and ii) the retention time
of the variant antibody determined in step a) and the retention
time of the variant antibody determined in step b) are
substantially the same.
[0038] Another aspect as reported herein is a method for selecting
an antibody with increased or decreased in the vivo half-life
relative to a reference antibody comprising the following steps:
[0039] a) determining the retention time of the antibody and the
reference antibody on an FcRn affinity chromatography column with a
positive linear pH gradient elution in the presence of a first salt
concentration, [0040] b) determining the retention time of the
antibody and the reference antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0041] whereby in case of selecting an antibody with increased in
vivo half-life relative to the reference antibody an antibody is
selected that has i) a retention time determined in step a) that is
longer than the retention time of the reference antibody determined
in step a), and ii) a retention time determined in step a) that is
substantially the same as the retention time determined in step
b),
[0042] whereby in case of selecting an antibody with decreased in
vivo half-life relative to the reference antibody an antibody is
selected that has i) a retention time determined in step a) that is
shorter than the retention time of the reference antibody
determined in step a), and ii) a retention time determined in step
a) that is substantially the same as the retention time determined
in step b).
[0043] Another aspect as reported herein is a method for selecting
an antibody without antibody-Fab-FcRn interaction influencing the
vivo half-life of the antibody: [0044] a) determining the retention
time of the antibody on an FcRn affinity chromatography column with
a positive linear pH gradient elution in the presence of a first
salt concentration, [0045] b) determining the retention time of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of a second salt
concentration,
[0046] whereby an antibody is selected that has a retention time
determined in step a) that is not substantially different from the
retention time determined in step b) and thereby selecting an
antibody without antibody-Fab-FcRn interaction influencing the vivo
half-life of the antibody.
[0047] One aspect as reported herein is a method for producing an
antibody comprising the following steps: [0048] a) providing a cell
comprising one or more nucleic acids encoding an antibody with
increased or decreased in vivo half-life relative to a reference
antibody selected with a method as reported herein, and [0049] b)
cultivating the cell in a cultivation medium and recovering the
antibody from the cell or the cultivation medium and thereby
producing the antibody.
[0050] One aspect as reported herein is a method for increasing the
in vivo half-life of an antibody comprising the step of: [0051]
changing a charged amino acid residue at the positions 27, 55 and
94 in the light chain of an antibody to a hydrophobic or neutral
hydrophilic amino acid residue (numbering according to Kabat) and
thereby increasing the in vivo half-life of the antibody.
[0052] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction influencing the in
vivo half-life of the antibody comprising the following steps:
[0053] a) determining the retention time of the antibody and of a
reference antibody on an FcRn affinity chromatography column at a
first pH value with a salt gradient elution, [0054] b) determining
the retention time of the antibody and a reference antibody on an
FcRn affinity chromatography column at a second pH value with a
salt gradient elution,
[0055] whereby the presence of antibody-Fab-FcRn interaction
influencing the in vivo half-life of the antibody is determined if
the ratio of the retention times of the antibody and the reference
antibody determined in step a) is substantially different from the
ratio of the retention times of the antibody and the reference
antibody determined in step b).
[0056] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction influencing the in
vivo half-life of the antibody comprising the following steps:
[0057] a) determining for a variant antibody and its parent
antibody the K.sub.D values at pH 6 using surface plasmon
resonance, [0058] b) determining the retention time of the variant
antibody and its parent antibody on an FcRn affinity chromatography
column with a positive linear pH gradient elution in the presence
of a high salt concentration,
[0059] whereby the presence of antibody-Fab-FcRn interaction
influencing the in vivo half-life of the antibody is determined if
the K.sub.D values differ by at most a factor of 10 and the
retention time determined in step b) between the variant antibody
and its parent antibody are substantially different.
[0060] One aspect as reported herein is a method for determining
the relative in vivo half-life of an antibody comprising the
following steps: [0061] a) determining for a variant antibody and
its parent antibody the K.sub.D values at pH 6 using surface
plasmon resonance, [0062] b) determining the retention time of the
variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration,
[0063] whereby the antibody has a relative in vivo half-life that
is reduced compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is shorter/smaller than the
retention time of its parent antibody, and
[0064] whereby the antibody has a relative in vivo half-life that
is increased compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is longer/bigger than the
retention time of its parent antibody.
[0065] One aspect as reported herein is a method for determining an
increase or a decrease of the vivo half-life of an antibody
comprising the following steps: [0066] a) determining for a variant
antibody and its parent antibody the K.sub.D values at pH 6 using
surface plasmon resonance, [0067] b) determining the retention time
of the variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration,
[0068] whereby the antibody has a decrease of the in vivo half-life
compared to its parent antibody if the K.sub.D values differ by at
most a factor of 10 and the retention time determined in step b) of
the variant antibody is shorter/smaller than the retention time of
its parent antibody, and
[0069] whereby the antibody has an increase of the in vivo
half-life compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is longer/bigger than the
retention time of its parent antibody.
[0070] In one embodiment the antibody is a full length
antibody.
[0071] In one embodiment of all aspects the positive linear pH
gradient is from about pH 5.5 to about pH 8.8.
[0072] In one embodiment of all aspects the salt is selected from
sodium chloride, sodium sulphate, potassium chloride, potassium
sulfate, sodium citrate, or potassium citrate.
[0073] In one embodiment of all aspects the salt is sodium
chloride.
[0074] In one embodiment of all aspects the first salt
concentration is between 50 mM and 200 mM.
[0075] In one embodiment of all aspects the first salt
concentration is about 140 mM.
[0076] In one embodiment of all aspects the second salt
concentration is between 300 mM and 600 mM.
[0077] In one embodiment of all aspects the second salt
concentration is about 400 mM.
[0078] In one embodiment of all aspects the retention times that
are substantially different in step a) and step b) differ by at
least 5%.
[0079] In one embodiment of all aspects the retention times that
are substantially different in step a) and step b) differ by at
least 10%.
[0080] In one embodiment of all aspects the retention times that
are substantially different in step a) and step b) differ by at
least 15%.
[0081] In one embodiment of all aspects if the retention times are
substantially different in step a) and step b) the retention time
in step a) is bigger/longer than in step b).
[0082] In one embodiment of all aspects if the retention times are
substantially different in step a) and step b) the retention time
in step b) is smaller/shorter than in step a).
[0083] In one embodiment of all aspects if the retention times are
substantially different in step a) and step b) the retention times
are proportional to one above the square root of the salt
concentration (.about.1/SQRT(c(salt))).
[0084] In one embodiment of all aspects the parent or reference
antibody is the anti-IL-1R antibody with SEQ ID NO: 01 (heavy
chain) and SEQ ID NO: 02 (light chain) for the subclass IgG1 and
the anti-IL-1R antibody with SEQ ID NO: 03 (heavy chain) and SEQ ID
NO: 04 (light chain) for the subclass IgG4.
[0085] In one embodiment of all aspects the parent or reference
antibody is the anti-HER2 antibody with SEQ ID NO: 36 (heavy chain)
and SEQ ID NO: 37 (light chain) for the subclass IgG1 and the
anti-HER2 antibody with SEQ ID NO: 38 (heavy chain) and SEQ ID NO:
39 (light chain) for the subclass IgG4.
[0086] In one embodiment of all aspects the parent or reference
antibody is Ustekinumab with light and heavy chain amino acid
sequence as depicted in FIG. 5.
[0087] In one embodiment of all aspects the FcRn affinity
chromatography column comprises a non-covalent complex of a
neonatal Fc receptor (FcRn) and beta-2-microglobulin (b2m).
[0088] In one embodiment of all aspects the FcRn affinity
chromatography column comprises a covalent complex of a neonatal Fc
receptor (FcRn) and beta-2-microglobulin (b2m).
[0089] In one embodiment of all aspects the complex of the neonatal
Fc receptor (FcRn) and beta-2-microglobulin (b2m) is bound to a
solid phase.
[0090] In one embodiment of all aspects the solid phase is a
chromatography material.
[0091] In one embodiment of all aspects the complex of a neonatal
Fc receptor (FcRn) and beta-2-microglobulin (b2m) is biotinylated
and the solid phase is derivatized with streptavidin.
[0092] In one embodiment of all aspects the beta-2-microglobulin is
from the same species as the neonatal Fc receptor (FcRn).
[0093] In one embodiment of all aspects the beta-2-microglobulin is
from a different species as the FcRn.
[0094] In one embodiment of all aspects the FcRn is selected from
human FcRn, cynomolgus FcRn, mouse FcRn, rat FcRn, sheep FcRn, dog
FcRn, pig FcRn, minipig FcRn, and rabbit FcRn.
[0095] In one embodiment of all aspects the antibody is a
monospecific antibody or antibody fragment of fusion polypeptide,
or a bispecific antibody or antibody fragment of fusion
polypeptide, or a trispecific antibody or antibody fragment of
fusion polypeptide, or a tetraspecific antibody or antibody
fragment of fusion polypeptide.
[0096] In one embodiment the antibody is an antibody of the class
IgG. In one embodiment the antibody is an antibody of the subclass
IgG1, IgG2, IgG3 or IgG4. In one embodiment the antibody is an
antibody of the subclass IgG1 or IgG4.
DESCRIPTION OF THE FIGURES
[0097] FIGS. 1A-1D
[0098] Charge distribution and pH-dependent net charge.
Isopotential surfaces of the proteins protonated at pH 7.4 and
contoured at 2 kBT/e; black: positive/negative. (FIG. 1a)
Briakinumab. The light chain is shown in light gray, the heavy
chain is shown in darker grey. Views of the middle and right images
are related to the view in the left panel by a rotation about a
vertical and a horizontal axis, respectively. (FIG. 1b)
Ustekinumab. Light and heavy chains are colored in light and dark
gray, respectively. The views are identical to (FIG. 1a). (FIG. 1c)
Isopotential surface contoured at 2 k.sub.BT/e of a human FcRn
homology model in complex with human .beta.2 microglobulin
(.beta..sub.2m). The Fc domain is shown for clarity. (FIG. 1d)
Sequence-based calculated net charge vs. pH of Briakinumab and
Ustekinumab. Protein structures were prepared with DiscoveryStudio
Pro.
[0099] FIG. 2 pH-dependent FcRn-IgG interaction. FcRn affinity
chromatograms of the eleven IgG variants were intensity-normalized
for clarity. A molecular surface representation of the structural
models, protonated at pH 7.4, were superimposed with isopotential
surfaces contoured at 2 k.sub.BT/e. The view is identical to the
right panel in FIG. 1a and focuses on the CDR regions. A second
horizontal axis indicates the elution pH, interpolated from offline
pH measurements.
[0100] FIGS. 3A-3B
[0101] Effect of the FcRn elution pH on pharmacokinetics in human
FcRn transgenic mice. Antibodies were administered as a single i.v.
bolus injection of 10 mg/kg to 6 animals per group. Data points
represent the mean .+-.standard deviation. (FIG. 3a) Blood level
curves of Briakinumab (diamonds, orange), Ustekinumab (squares,
green), mAb 8 (triangles, purple) and mAb 9 (circles, blue). (FIG.
3b) Correlation between the terminal half-life with the FcRn column
elution pH.
[0102] FIGS. 4A-4E
[0103] Molecular dynamics simulation of FcRn-IgG models. (FIG. 4a)
Conformation at the start of the simulation. The dashed line
indicates the distance between two example amino acids in the Fv
region and in the FcRn, which approach during the MD simulation as
shown in panel (FIG. 4c). The colors are identical to FIG. 1. (FIG.
4b) Conformation at the end of the simulation (t=100 ns). The box
indicates the part of the molecule shown in (FIG. 4c). (FIG. 4c)
Detailed view of the interaction between FcRn and the Fv domains.
Note that the interacting framework, CDR and FcRn residues are
different in Briakinumab and Ustekinumab. (FIG. 4d) Distance
between residues 245 (FcRn) and 100 (Ustekinumab LC) and 29
(Briakinumab LC), respectively during the course of the simulation.
(FIG. 4e) Interaction energies at the end of the simulation
(average and standard deviations of conformations at 96, 97, 98, 99
and 100 ns). "VDW" and "Electrostatic" denote the van-der-Waals and
electrostatic contributions, respectively, to the FcRn-Fab
interaction. Protein structures were prepared with PyMol.TM.
(Schrodinger LLC).
[0104] FIG. 5 Sequence alignment of Briakinumab and Ustekinumab
light and heavy chains. VH and VL regions are shown in italics;
CDRs are marked with an asterisk (*); a hash (#) denotes amino
acids in close proximity (<4 .ANG.) to the FcRn in the starting
structure. A ".largecircle." symbol marks the residue mutated to
Cys to establish a disulfide bridge to the FcRn for MD
purposes.
[0105] FIG. 6 Salt-dependence of the FcRn affinity column retention
times of Briakinumab and Ustekinumab. Briakinumab and Ustekinumab
were subjected to FcRn column chromatography with pH gradient
elution in the presence of increasing amounts of NaCl. Data are
fitted to an inverse square root function to account for the charge
shielding effect by dissolved salt. Briakinumab retention times
decrease with 1/ {square root over (c(NaCl))} (r.sup.2=0.898),
whereas the retention times of Ustekinumab remain essentially
unaffected.
[0106] FIG. 7 Linearity of applied antibody and area under the
curve of a chromatography using an FcRn column as reported
herein.
[0107] FIG. 8 Chromatogram of anti-IGF-1R antibody wild-type and
YTE-mutant on FcRn column as reported herein.
[0108] FIG. 9 FcRn affinity chromatogram of Avastin-wild-type and
the Avastin-mutant.
[0109] FIGS. 10A-10D
[0110] Scheme of the change of the retention time on an FcRn
affinity chromatography column depending on the antibody-FcRn
interactions of the Fc-region and the antibody-Fab; 1: parent
antibody, 2: parent antibody Fc-region, 3: variant antibody, 4:
variant antibody Fc-region; solid-line: complete antibody
(antibody-Fab+Fc-region), dotted line: Fc-region only; FIG. 10A:
wild-type-like Fc-region, no antibody-Fab-FcRn interaction; FIG.
10B: wild-type-like Fc-region, antibody-Fab-FcRn interaction; FIG.
10C: engineered Fc-region with improved FcRn-binding, no
antibody-Fab-FcRn interaction; FIG. 10D:. engineered Fc-region with
improved FcRn-binding, antibody-Fab-FcRn interaction.
[0111] FIG. 11 Scheme showing an engineered antibody with improved
FcRn binding, antibody-Fab-FcRn interaction but reduced in vivo
half-life as the antibody-FcRn interaction results in an improved
clearance (retention time above critical retention time).
[0112] FIGS. 12A-12E
[0113] Scheme of the change of the retention time on an FcRn
affinity chromatography column depending on the antibody-FcRn
interactions of the Fc-region and the antibody-Fab; 1: reference
antibody, 2: reference antibody Fc-region, 3: antibody, 4: antibody
Fc-region; solid-line: complete antibody (antibody-Fab+Fc-region),
dotted line: Fc-region only.
[0114] FIG. 13 Dependence of FcRn affinity chromatography retention
time on salt concentration and antibody-Fab-FcRn interaction.
[0115] FIG. 14 Sequence alignment of Bevacizumab and the
Bevacizumab variant light chain variable domains. Identical and
similar amino acids are shown in grey; CDRs are marked with an
asterisk (*).
[0116] FIG. 15 IL-12 interaction of Briakinumab, Ustekinumab and
mAb 1-6; 1: Briakinumab, 2: Ustekinumab, 3: mAb 1, 4: mAb 2, 5: mAb
3, 6: mAb 4, 7: mAb 5, 8: mAb 6.
[0117] FIG. 16 IL-12 interaction of Briakinumab, Ustekinumab and
mAb 7-10; 1: Briakinumab, 2: Ustekinumab, 3: mAb 7, 4: mAb 8, 5:
mAb 9, 6: mAb 10.
DETAILED DESCRIPTION OF THE INVENTION
[0118] Combining the results of the structural analysis of the
FcRn-mAb (mAb=monoclonal antibody) interaction leads to the
conclusion that the Fv domain and especially the light chain
variable domain (VL) provides the main influence on the FcRn-mAb
dissociation. This finding was unexpected because the Fv domain is
distant from the cognate FcRn-binding site.
[0119] Antibodies did not show differences in pH 6.0 affinity,
therefore the Fab region seems to have no influence on pH 6.0
binding. In contrast, the dissociation between FcRn and the
antibodies was influenced by the Fab region.
[0120] FcRn-IgG dissociation pHs in vitro correlated linearly with
in vivo terminal half-lives. In conclusion, these findings support
the assumption that antibodies showing slower dissociation at
higher pH values are transported back into the cell and are
subsequently degraded instead of being released back to blood
circulation.
[0121] It has been found that the charge distribution in the Fv
domain influences antibody-FcRn binding and results in additional
interactions between the antibody and the FcRn. This changes the
FcRn binding characteristics, especially with respect to the
dissociation of the antibody-FcRn complex at pH 7.4, thereby
reducing FcRn-dependent terminal half-life of the antibody.
[0122] I. Definitions
[0123] The terms "a" and "an" denote one or two or three or four or
five or six and up to 10.sup.9.
[0124] The term "about" denotes a range of +/-20% of the thereafter
following numerical value. In one embodiment the term about denotes
a range of +/-10% of the thereafter following numerical value. In
one embodiment the term about denotes a range of +/-5% of the
thereafter following numerical value.
[0125] The term "comprising" also includes the term "consisting
of".
[0126] The term "alteration" denotes the mutation (substitution),
insertion (addition), modification (derivatization), or deletion of
one or more amino acid residues in a parent antibody or fusion
polypeptide, e.g. a fusion polypeptide comprising at least an FcRn
binding portion of an Fc-region, to obtain a modified antibody or
fusion polypeptide. The term "mutation" denotes that the specified
amino acid residue is substituted for a different amino acid
residue. For example the mutation L234A denotes that the amino acid
residue lysine at position 234 in an antibody Fc-region
(polypeptide) is substituted by the amino acid residue alanine
(substitution of lysine with alanine) (numbering according to the
EU index).
[0127] The term "amino acid mutation" denotes the substitution of
at least one existing amino acid residue with another different
amino acid residue (=replacing amino acid residue). The replacing
amino acid residue may be a "naturally occurring amino acid
residues" and selected from the group consisting of alanine (three
letter code: ala, one letter code: A), arginine (arg, R),
asparagine (asn, N), aspartic acid (asp, D), cysteine (cys, C),
glutamine (gln, Q), glutamic acid (glu, E), glycine (gly, G),
histidine (his, H), isoleucine (ile, I), leucine (leu, L), lysine
(lys, K), methionine (met, M), phenylalanine (phe, F), proline
(pro, P), serine (ser, S), threonine (thr, T), tryptophan (trp, W),
tyrosine (tyr, Y), and valine (val, V). The replacing amino acid
residue may be a "non-naturally occurring amino acid residue". See
e.g. U.S. Pat. No. 6,586,207, WO 98/48032, WO 03/073238, US
2004/0214988, WO 2005/35727, WO 2005/74524, Chin, J. W., et al., J.
Am. Chem. Soc. 124 (2002) 9026-9027; Chin, J. W. and Schultz, P.
G., ChemBioChem 11 (2002) 1135-1137; Chin, J. W., et al., PICAS
United States of America 99 (2002) 11020-11024; and, Wang, L. and
Schultz, P. G., Chem. (2002) 1-10 (all entirely incorporated by
reference herein).
[0128] The term "amino acid insertion" denotes the (additional)
incorporation of at least one amino acid residue at a predetermined
position in an amino acid sequence. In one embodiment the insertion
will be the insertion of one or two amino acid residues. The
inserted amino acid residue(s) can be any naturally occurring or
non-naturally occurring amino acid residue.
[0129] The term "amino acid deletion" denotes the removal of at
least one amino acid residue at a predetermined position in an
amino acid sequence.
[0130] The term "antibody" herein is used in a broad sense and
encompasses various antibody structures, including but not limited
to monoclonal antibodies and multispecific antibodies (e.g.
bispecific antibodies, trispecific antibodies) so long as they are
full length antibodies and exhibit the desired antigen- and/or
FcRn-binding activity.
[0131] The term "binding (to an antigen)" denotes the binding of an
antibody in an in vitro assay. In one embodiment binding is
determined in a binding assay in which the antibody is bound to a
surface and binding of the antigen to the antibody is measured by
Surface Plasmon Resonance (SPR). Binding means e.g. a binding
affinity (KD) of 10.sup.-8 M or less, in some embodiments of
10.sup.-13 to 10.sup.-8 M, in some embodiments of 10.sup.-13 to
10.sup.-9 M.
[0132] Binding can be investigated by a BlAcore assay (GE
Healthcare Biosensor AB, Uppsala, Sweden). The affinity of the
binding is defined by the terms k.sub.a (rate constant for the
association of the antibody from the antibody/antigen complex),
k.sub.d (dissociation constant), and K.sub.D (k.sub.d/k.sub.a).
[0133] The term "buffer substance" denotes a substance that when in
solution can level changes of the pH value of the solution e.g. due
to the addition or release of acidic or basic substances.
[0134] The term "CH2-domain" denotes the part of an antibody heavy
chain polypeptide that extends approximately from EU position 231
to EU position 340 (EU numbering system according to Kabat). In one
embodiment a CH2 domain has the amino acid sequence of SEQ ID NO:
05: APELLGG PSVFLFPPKP KDTLMISRTP EVTCVWDVS HEDPEVKFNW YVDGVEVHNA
KTKPREEQ E STYRWSVLT VLHQDWLNGK EYKCKVSNKA LPAPIEKTIS KAK.
[0135] The term "CH3-domain" denotes the part of an antibody heavy
chain polypeptide that extends approximately from EU position 341
to EU position 446. In one embodiment the CH3 domain has the amino
acid sequence of SEQ ID NO: 06: GQPREPQ VYTLPPSRDE LTKNQVSLTC
LVKGFYPSDI AVEWESNGQP ENNYKTTPPV LDSDGSFFLY SKLTVDKSRW QQGNVFSCSV
MHEALHNHYT QKSLSLSPG.
[0136] The "class" of an antibody refers to the type of constant
domain or constant region possessed by its heavy chain. There are
five major classes of antibodies: IgA, IgD, IgE, IgG, and IgM, and
several of these may be further divided into subclasses (isotypes),
e.g., IgG.sub.1, IgG.sub.2, IgG.sub.3, IgG.sub.4, IgA.sub.1, and
IgA.sub.2. The heavy chain constant domains that correspond to the
different classes of immunoglobulins are called .alpha., .delta.,
.epsilon., .gamma., and .mu., respectively.
[0137] An "effective amount" of an agent, e.g., a pharmaceutical
formulation, refers to an amount effective, at dosages and for
periods of time necessary, to achieve the desired therapeutic or
prophylactic result.
[0138] The term "Fc-fusion polypeptide" denotes a fusion of a
binding domain (e.g. an antigen binding domain such as a single
chain antibody, or a polypeptide such as a ligand of a receptor)
with an antibody Fc-region that exhibits the desired target- and/or
protein A and/or FcRn-binding activity.
[0139] The term "Fc-region of human origin" denotes the C-terminal
region of an immunoglobulin heavy chain of human origin that
contains at least a part of the hinge region, the CH2 domain and
the CH3 domain. In one embodiment, a human IgG heavy chain
Fc-region extends from Cys226, or from Pro230, to the
carboxyl-terminus of the heavy chain. In one embodiment the
Fc-region has the amino acid sequence of SEQ ID NO: 07. However,
the C-terminal lysine (Lys447) of the Fc-region may or may not be
present. Unless otherwise specified herein, numbering of amino acid
residues in the Fc-region or constant region is according to the EU
numbering system, also called the EU index, as described in Kabat,
E. A., et al., Sequences of Proteins of Immunological Interest, 5th
ed., Public Health Service, National Institutes of Health,
Bethesda, Md. (1991), NIH Publication 91 3242. The Fc-region is
composed of two heavy chain Fc-region polypeptides, which can be
covalently linked to each other via the hinge region cysteine
residues forming inter-polypeptide disulfide bonds.
[0140] The term "FcRn" denotes the human neonatal Fc-receptor. FcRn
functions to salvage IgG from the lysosomal degradation pathway,
resulting in reduced clearance and increased half-life. The FcRn is
a heterodimeric protein consisting of two polypeptides: a 50 kDa
class I major histocompatibility complex-like protein
(.alpha.-FcRn) and a 15 kDa .beta.2-microglobulin (.beta.2m). FcRn
binds with high affinity to the CH2-CH3 portion of the Fc-region of
IgG. The interaction between IgG and FcRn is strictly pH dependent
and occurs in a 1:2 stoichiometry, with one IgG binding to two FcRn
molecules via its two heavy chains (Huber, A. H., et al., J. Mol.
Biol. 230 (1993) 1077-1083). FcRn binding occurs in the endosome at
acidic pH (pH<6.5) and IgG is released at the neutral cell
surface (pH of about 7.4). The pH-sensitive nature of the
interaction facilitates the FcRn-mediated protection of IgGs
pinocytosed into cells from intracellular degradation by binding to
the receptor within the acidic environment of endosomes. FcRn then
facilitates the recycling of IgG to the cell surface and subsequent
release into the blood stream upon exposure of the FcRn-IgG complex
to the neutral pH environment outside the cell.
[0141] The term "FcRn binding portion of an Fc-region" denotes the
part of an antibody heavy chain polypeptide that extends
approximately from EU position 243 to EU position 261 and
approximately from EU position 275 to EU position 293 and
approximately from EU position 302 to EU position 319 and
approximately from EU position 336 to EU position 348 and
approximately from EU position 367 to EU position 393 and EU
position 408 and approximately from EU position 424 to EU position
440. In one embodiment one or more of the following amino acid
residues according to the EU numbering of Kabat are altered F243,
P244, P245 P, K246, P247, K248, D249, T250, L251, M252, I253, S254,
R255, T256, P257, E258, V259, T260, C261, F275, N276, W277, Y278,
V279, D280, V282, E283, V284, H285, N286, A287, K288, T289, K290,
P291, R292, E293, V302, V303, S304, V305, L306, T307, V308, L309,
H310, Q311, D312, W313, L314, N315, G316, K317, E318, Y319, I336,
S337, K338, A339, K340, G341, Q342, P343, R344, E345, P346, Q347,
V348, C367, V369, F372, Y373, P374, S375, D376, I377, A378, V379,
E380, W381, E382, S383, N384, G385, Q386, P387, E388, N389, Y391,
T393, S408, S424, C425, S426, V427, M428, H429, E430, A431, L432,
H433, N434, H435, Y436, T437, Q438, K439, and S440 (EU
numbering).
[0142] The term "full length antibody" denotes an antibody having a
structure substantially similar to a native antibody structure. A
full length antibody comprises two full length antibody light
chains comprising a light chain variable domain and a light chain
constant domain and two full length antibody heavy chains
comprising a heavy chain variable domain, a first constant domain,
a hinge region, a second constant domain and a third constant
domain. A full length antibody may comprise further domains, such
as e.g. additional scFv or a scFab conjugated to one or more of the
chains of the full length antibody. These conjugates are also
encompassed by the term full length antibody.
[0143] The term "hinge region" denotes the part of an antibody
heavy chain polypeptide that joins the CH1 domain and the CH2
domain, e. g. from about position 216 to position about 230
according to the EU numbering system of Kabat. In one embodiment
the hinge region is a shortened hinge region comprising residues
221 to 230 according to the EU numbering system of Kabat. The hinge
region is normally a dimeric molecule consisting of two
polypeptides with identical amino acid sequence. The hinge region
generally comprises about 25 amino acid residues and is flexible
allowing the antigen binding regions to move independently. The
hinge region can be subdivided into three domains: the upper, the
middle, and the lower hinge domain (Roux, et al., J. Immunol. 161
(1998) 4083).
[0144] The terms "host cell", "host cell line", and "host cell
culture" are used interchangeably and refer to cells into which
exogenous nucleic acid has been introduced, including the progeny
of such cells. Host cells include "transformants" and "transformed
cells," which include the primary transformed cell and progeny
derived therefrom without regard to the number of passages. Progeny
may not be completely identical in nucleic acid content to a parent
cell, but may contain mutations. Mutant progeny that have the same
function or biological activity as screened or selected for in the
originally transformed cell are included herein.
[0145] The term "derived from" denotes that an amino acid sequence
is derived from a parent amino acid sequence by introducing
alterations at at least one position. Thus a derived amino acid
sequence differs from the corresponding parent amino acid sequence
at at least one corresponding position (numbering according to
Kabat EU index for antibody Fc-regions). In one embodiment an amino
acid sequence derived from a parent amino acid sequence differs by
one to fifteen amino acid residues at corresponding positions. In
one embodiment an amino acid sequence derived from a parent amino
acid sequence differs by one to ten amino acid residues at
corresponding positions. In one embodiment an amino acid sequence
derived from a parent amino acid sequence differs by one to six
amino acid residues at corresponding positions. Likewise a derived
amino acid sequence has a high amino acid sequence identity to its
parent amino acid sequence. In one embodiment an amino acid
sequence derived from a parent amino acid sequence has 80% or more
amino acid sequence identity. In one embodiment an amino acid
sequence derived from a parent amino acid sequence has 90% or more
amino acid sequence identity. In one embodiment an amino acid
sequence derived from a parent amino acid sequence has 95% or more
amino acid sequence identity.
[0146] The term "human Fc-region polypeptide" denotes an amino acid
sequence which is identical to a "native" or "wild-type" human
Fc-region polypeptide. The term "variant (human) Fc-region
polypeptide" denotes an amino acid sequence which derived from a
"native" or "wild-type" human Fc-region polypeptide by virtue of at
least one "amino acid alteration". A "human Fc-region" is
consisting of two human Fc-region polypeptides. A "variant (human)
Fc-region" is consisting of two Fc-region polypeptides, whereby
both can be variant (human) Fc-region polypeptides or one is a
human Fc-region polypeptide and the other is a variant (human)
Fc-region polypeptide.
[0147] In one embodiment the human Fc-region polypeptide has the
amino acid sequence of a human IgG1 Fc-region polypeptide of SEQ ID
NO: 07, or of a human IgG2 Fc-region polypeptide of SEQ ID NO: 08,
or of a human IgG3 Fc-region polypeptide of SEQ ID NO: 09, or of a
human IgG4 Fc-region polypeptide of SEQ ID NO: 10. In one
embodiment the Fc-region polypeptide is derived from an Fc-region
polypeptide of SEQ ID NO: 07, or 08, or 09, or 10 and has at least
one amino acid mutation compared to the Fc-region polypeptide of
SEQ ID NO: 07, or 08, or 09, or 10. In one embodiment the Fc-region
polypeptide comprises/has from about one to about ten amino acid
mutations, and in one embodiment from about one to about five amino
acid mutations. In one embodiment the Fc-region polypeptide has at
least about 80% homology with a human Fc-region polypeptide of SEQ
ID NO: 07, or 08, or 09, or 10. In one embodiment the Fc-region
polypeptide has least about 90% homology with a human Fc-region
polypeptide of SEQ ID NO: 07, or 08, or 09, or 10. In one
embodiment the Fc-region polypeptide has at least about 95%
homology with a human Fc-region polypeptide of SEQ ID NO: 07, or
08, or 09, or 10.
[0148] The Fc-region polypeptide derived from a human Fc-region
polypeptide of SEQ ID NO: 07, or 08 or 09, or 10 is defined by the
amino acid alterations that are contained. Thus, for example, the
term P329G denotes an Fc-region polypeptide derived human Fc-region
polypeptide with the mutation of proline to glycine at amino acid
position 329 relative to the human Fc-region polypeptide of SEQ ID
NO: 07, or 08, or 09, or 10.
[0149] For all heavy chain positions discussed in the present
invention, numbering is according to the EU index. The EU index or
EU index as in Kabat or Kabat EU index or EU numbering scheme
refers to the numbering of the EU antibody (Edelman, et al., Proc.
Natl. Acad. Sci. USA 63 (1969) 78-85, hereby entirely incorporated
by reference). The numbering of the light chain residues is
according to the Kabat nomenclature (Kabat, E. A., et al.,
Sequences of Proteins of Immunological Interest, 5th ed., Public
Health Service, National Institutes of Health, Bethesda, Md.
(1991), NIH Publication 91 3242).
[0150] A human IG1 Fc-region polypeptide has the following amino
acid sequence:
TABLE-US-00001 (SEQ ID NO: 07)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0151] A human IgG1 Fc-region derived Fc-region polypeptide with
the mutations L234A, L235A has the following amino acid
sequence:
TABLE-US-00002 (SEQ ID NO: 11)
DKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0152] A human IgG1 Fc-region derived Fc-region polypeptide with
Y349C, T366S, L368A and Y407V mutations has the following amino
acid sequence:
TABLE-US-00003 (SEQ ID NO: 12)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVCTLPPSRDELTKNQVSLSCAVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0153] A human IgG1 Fc-region derived Fc-region polypeptide with
S354C, T366W mutations has the following amino acid sequence:
TABLE-US-00004 (SEQ ID NO: 13)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVYTLPPCRDELTKNQVSLWCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0154] A human IgG1 Fc-region derived Fc-region polypeptide with
L234A, L235A mutations and Y349C, T366S, L368A, Y407V mutations has
the following amino acid sequence:
TABLE-US-00005 (SEQ ID NO: 14)
DKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVCTLPPSRDELTKNQVSLSCAVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0155] A human IgG1 Fc-region derived Fc-region polypeptide with a
L234A, L235A and S354C, T366W mutations has the following amino
acid sequence:
TABLE-US-00006 (SEQ ID NO: 15)
DKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALPAPIEKTISKAKGQPREPQVYTLPPCRDELTKNQVSLWCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0156] A human IgG1 Fc-region derived Fc-region polypeptide with a
P329G mutation has the following amino acid sequence:
TABLE-US-00007 (SEQ ID NO: 16)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0157] A human IgG1 Fc-region derived Fc-region polypeptide with
L234A, L235A mutations and P329G mutation has the following amino
acid sequence:
TABLE-US-00008 (SEQ ID NO: 17)
DKTHTCPPCPAPEAAGGPSVFLEPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVYTLPPSRDELTKNQVSLTCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0158] A human IgG1 Fc-region derived Fc-region polypeptide with a
P329G mutation and Y349C, T366S, L368A, Y407V mutations has the
following amino acid sequence:
TABLE-US-00009 (SEQ ID NO: 18)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVCTLPPSRDELTKNQVSLSCAVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0159] A human IgG1 Fc-region derived Fc-region polypeptide with a
P329G mutation and S354C, T366W mutation has the following amino
acid sequence:
TABLE-US-00010 (SEQ ID NO: 19)
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVYTLPPCRDELTKNQVSLWCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0160] A human IgG1 Fc-region derived Fc-region polypeptide with
L234A, L235A, P329G and Y349C, T366S, L368A, Y407V mutations has
the following amino acid seauence:
TABLE-US-00011 (SEQ ID NO: 20)
DKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVCTLPPSRDELTKNQVSLSCAVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0161] A human IgG1 Fc-region derived Fc-region polypeptide with
L234A, L235A, P329G mutations and S354C, T366W mutations has the
following amino acid sequence:
TABLE-US-00012 (SEQ ID NO: 21)
DKTHTCPPCPAPEAAGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHED
PEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYK
CKVSNKALGAPIEKTISKAKGQPREPQVYTLPPCRDELTKNQVSLWCLVK
GFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQG
NVFSCSVMHEALHNHYTQKSLSLSPGK.
[0162] A human IgG4 Fc-region polypeptide has the following amino
acid sequence:
TABLE-US-00013 (SEQ ID NO: 10)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0163] A human IgG4 Fc-region derived Fc-region polypeptide with
S228P and L235E mutations has the following amino acid
sequence:
TABLE-US-00014 (SEQ ID NO: 22)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0164] A human IgG4 Fc-region derived Fc-region polypeptide with
S228P, L235E mutations and P329G mutation has the following amino
acid sequence:
TABLE-US-00015 (SEQ ID NO: 23)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0165] A human IgG4 Fc-region derived Fc-region polypeptide with
S354C, T366W mutations has the following amino acid sequence:
TABLE-US-00016 (SEQ ID NO: 24)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPCQEEMTKNQVSLWCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0166] A human IgG4 Fc-region derived Fc-region polypeptide with
Y349C, T366S, L368A, Y407V mutations has the following amino acid
sequence:
TABLE-US-00017 (SEQ ID NO: 25)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVCTLPPSQEEMTKNQVSLSCA
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0167] A human IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E and S354C, T366W mutations has the following amino
acid sequence:
TABLE-US-00018 (SEQ ID NO: 26)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVYTLPPCQEEMTKNQVSLWCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0168] A human IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E and Y349C, T366S, L368A, Y407V mutations has the
following amino acid sequence:
TABLE-US-00019 (SEQ ID NO: 27)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLPSSIEKTISKAKGQPREPQVCTLPPSQEEMTKNQVSLSCA
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0169] A human IgG4 Fc-region derived Fc-region polypeptide with a
P329G mutation has the following amino acid sequence:
TABLE-US-00020 (SEQ ID NO: 28)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0170] A human IgG4 Fc-region derived Fc-region polypeptide with a
P329G and Y349C, T366S, L368A, Y407V mutations has the following
amino acid sequence:
TABLE-US-00021 (SEQ ID NO: 29)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVCTLPPSQEEMTKNQVSLSCA
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0171] A human IgG4 Fc-region derived Fc-region polypeptide with a
P329G and S354C, T366W mutations has the following amino acid
sequence:
TABLE-US-00022 (SEQ ID NO: 30)
ESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVYTLPPCQEEMTKNQVSLWCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0172] A human IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E, P329G and Y349C, T366S, L368A, Y407V mutations has
the following amino acid sequence:
TABLE-US-00023 (SEQ ID NO: 31)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVCTLPPSQEEMTKNQVSLSCA
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLVSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0173] A human IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E, P329G and S354C, T366W mutations has the following
amino acid sequence:
TABLE-US-00024 (SEQ ID NO: 32)
ESKYGPPCPPCPAPEFEGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQ
EDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKE
YKCKVSNKGLGSSIEKTISKAKGQPREPQVYTLPPCQEEMTKNQVSLWCL
VKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSRLTVDKSRWQ
EGNVFSCSVMHEALHNHYTQKSLSLSLGK.
[0174] An alignment of the different human Fc-regions is shown
below (EU numbering):
TABLE-US-00025 2 2 3 5 0 0 IGG1 DKTHTCPPCP APELLGGPSV FLFPPKPKDT
LMISRTPEVT CVVVDVSHED IGG2 ...VECPPCP APP.VAGPSV FLFPPKPKDT
LMISRTPEVT CVVVDVSHED IGG3 DTPPPCPRCP APELLGGPSV FLFPPKPKDT
LMISRTPEVT CVVVDVSHED IGG4 ...PPCPSCP APEFLGGPSV FLFPPKPKDT
LMISRTPEVT CVVVDVSQED -- HINGE -|-- CH2
------------------------------------ 3 0 0 IGG1 PEVKFNWYVD
GVEVHNAKTK PREEQYNSTY RVVSVLTVLH QDWLNGKEYK IGG2 PEVQFNWYVD
GVEVHNAKTK PREEQFNSTF RVVSVLTVVH QDWLNGKEYK IGG3 PEVQFKWYVD
GVEVHNAKTK PREEQYNSTF RVVSVLTVLH QDWLNGKEYK IGG4 PEVQFNWYVD
GVEVHNAKTK PREEQFNSTY RVVSVLTVLH QDWLNGKEYK -- CH2
----------------------------------------------- 3 5 0 IGG1
CKVSNKALPA PIEKTISKAK GQPREPQVYT LPPSRDELTK NQVSLTCLVK IGG2
CKVSNKGLPA PIEKTISKTK GQPREPQVYT LPPSREEMTK NQVSLTCLVK IGG3
CKVSNKALPA PIEKTISKTK GQPREPQVYT LPPSREEMTK NQVSLTCLVK IGG4
CKVSNKGLPS SIEKTISKAK GQPREPQVYT LPPSQEEMTK NQVSLTCLVK -- CH2
------- CH2 --|-- CH3 ------------------------- 4 0 0 IGG1
GFYPSDIAVE WESNGQPENN YKTTPPVLDS DGSFFLYSKL TVDKSRWQQG IGG2
GFYPSDISVE WESNGQPENN YKTTPPMLDS DGSFFLYSKL TVDKSRWQQG IGG3
GFYPSDIAVE WESSGQPENN YNTTPPMLDS DGSFFLYSKL TVDKSRWQQG IGG4
GFYPSDIAVE WESNGQPENN YKTTPPVLDS DGSFFLYSRL TVDKSRWQEG -- CH3
----------------------------------------------- 4 4 7 IGG1
NVFSCSVMHE ALHNHYTQKS LSLSPGK IGG2 NVFSCSVMHE ALHNHYTQKS LSLSPGK
IGG3 NIFSCSVMHE ALHNRFTQKS LSLSPGK IGG4 NVFSCSVMHE ALHNHYTQKS
LSLSLGK -- CH3 ----------------------|
[0175] A "humanized" antibody refers to a chimeric antibody
comprising amino acid residues from non-human HVRs and amino acid
residues from human FRs. In certain embodiments, a humanized
antibody will comprise substantially all of at least one, and
typically two, variable domains, in which all or substantially all
of the HVRs (e.g., the CDRs) correspond to those of a non-human
antibody, and all or substantially all of the FRs correspond to
those of a human antibody. A humanized antibody optionally may
comprise at least a portion of an antibody constant region derived
from a human antibody. A "humanized form" of an antibody, e.g., a
non-human antibody, refers to an antibody that has undergone
humanization.
[0176] An "individual" or "subject" is a mammal. Mammals include,
but are not limited to, domesticated animals (e.g. cows, sheep,
cats, dogs, and horses), primates (e.g., humans and non-human
primates such as monkeys), rabbits, and rodents (e.g., mice and
rats). In certain embodiments, the individual or subject is a
human.
[0177] An "isolated" antibody is one which has been separated from
a component of its natural environment. In some embodiments, an
antibody is purified to greater than 95% or 99% purity as
determined by, for example, electrophoretic (e.g., SDS-PAGE,
isoelectric focusing (IEF), capillary electrophoresis) or
chromatographic (e.g., size exclusion chromatography or ion
exchange or reverse phase HPLC). For review of methods for
assessment of antibody purity, see, e.g., Flatman, S. et al., J.
Chrom. B 848 (2007) 79-87.
[0178] An "isolated" nucleic acid refers to a nucleic acid molecule
that has been separated from a component of its natural
environment. An isolated nucleic acid includes a nucleic acid
molecule contained in cells that ordinarily contain the nucleic
acid molecule, but the nucleic acid molecule is present
extrachromosomally or at a chromosomal location that is different
from its natural chromosomal location.
[0179] The term "monoclonal antibody" as used herein refers to an
antibody obtained from a population of substantially homogeneous
antibodies, i.e., the individual antibodies comprising the
population are identical and/or bind the same epitope, except for
possible variant antibodies, e.g., containing naturally occurring
mutations or arising during production of a monoclonal antibody
preparation, such variants generally being present in minor
amounts. In contrast to polyclonal antibody preparations, which
typically include different antibodies directed against different
determinants (epitopes), each monoclonal antibody of a monoclonal
antibody preparation is directed against a single determinant on an
antigen. Thus, the modifier "monoclonal" indicates the character of
the antibody as being obtained from a substantially homogeneous
population of antibodies, and is not to be construed as requiring
production of the antibody by any particular method. For example,
the monoclonal antibodies to be used in accordance with the present
invention may be made by a variety of techniques, including but not
limited to the hybridoma method, recombinant DNA methods,
phage-display methods, and methods utilizing transgenic animals
containing all or part of the human immunoglobulin loci, such
methods and other exemplary methods for making monoclonal
antibodies being described herein.
[0180] "Native antibodies" refer to naturally occurring
immunoglobulin molecules with varying structures. For example,
native IgG antibodies are heterotetrameric glycoproteins of about
150,000 daltons, composed of two identical light chains and two
identical heavy chains that are disulfide-bonded. From N- to
C-terminus, each heavy chain has a variable region (VH), also
called a variable heavy domain or a heavy chain variable domain,
followed by three constant domains (CH1, CH2, and CH3). Similarly,
from N- to C-terminus, each light chain has a variable region (VL),
also called a variable light domain or a light chain variable
domain, followed by a constant light (CL) domain. The light chain
of an antibody may be assigned to one of two types, called kappa
(.kappa.) and lambda (.lamda.), based on the amino acid sequence of
its constant domain.
[0181] The term "negative linear pH gradient" denotes a pH gradient
starting at a high (i.e. neutral or alkaline) pH value and ending
at a lower (i.e. neutral or acidic) pH value. In one embodiment the
negative linear pH gradient starts at a pH value of about 8.8 and
ends at a pH value of about 5.5.
[0182] The term "non-naturally occurring amino acid residue"
denotes an amino acid residue, other than the naturally occurring
amino acid residues as listed above, which can be covalently bound
to the adjacent amino acid residues in a polypeptide chain.
Examples of non-naturally occurring amino acid residues are
norleucine, ornithine, norvaline, homoserine. Further examples are
listed in Ellman, et al., Meth. Enzym. 202 (1991) 301-336.
Exemplary method for the synthesis of non-naturally occurring amino
acid residues are reported in, e. g., Noren, et al., Science 244
(1989) 182 and Ellman et al., supra.
[0183] The term "pharmaceutical formulation" refers to a
preparation which is in such form as to permit the biological
activity of an active ingredient contained therein to be effective,
and which contains no additional components which are unacceptably
toxic to a subject to which the formulation would be
administered.
[0184] A "pharmaceutically acceptable carrier" refers to an
ingredient in a pharmaceutical formulation, other than an active
ingredient, which is nontoxic to a subject. A pharmaceutically
acceptable carrier includes, but is not limited to, a buffer,
excipient, stabilizer, or preservative.
[0185] The term "plasmid", as used herein, refers to a nucleic acid
molecule capable of propagating another nucleic acid to which it is
linked. The term includes the plasmid as a self-replicating nucleic
acid structure as well as the plasmid incorporated into the genome
of a host cell into which it has been introduced. Certain plasmids
are capable of directing the expression of nucleic acids to which
they are operatively linked. Such plasmids are referred to herein
as "expression plasmid".
[0186] The term "positive linear pH gradient" denotes a pH gradient
starting at a low (i.e. more acidic) pH value and ending at a
higher (i.e. less acidic, neutral or alkaline) pH value. In one
embodiment the positive linear pH gradient starts at a pH value of
about 5.5 and ends at a pH value of about 8.8.
[0187] The term "recombinant antibody", as used herein, denotes all
antibodies (chimeric, humanized and human) that are prepared,
expressed, created or isolated by recombinant means. This includes
antibodies isolated from a host cell such as a NS0 or CHO cell or
from an animal (e.g. a mouse) that is transgenic for human
immunoglobulin genes or antibodies expressed using a recombinant
expression plasmid transfected into a host cell. Such recombinant
antibodies have variable and constant regions in a rearranged form.
The recombinant antibodies as reported herein can be subjected to
in vivo somatic hypermutation. Thus, the amino acid sequences of
the VH and VL regions of the recombinant antibodies are sequences
that, while derived from and related to human germ line VH and VL
sequences, may not naturally exist within the human antibody germ
line repertoire in vivo.
[0188] A "solid phase" denotes a non-fluid substance, and includes
particles (including microparticles and beads) made from materials
such as polymer, metal (paramagnetic, ferromagnetic particles),
glass, and ceramic; gel substances such as silica, alumina, and
polymer gels; capillaries, which may be made of polymer, metal,
glass, and/or ceramic; zeolites and other porous substances;
electrodes; microtiter plates; solid strips; and cuvettes, tubes or
other spectrometer sample containers. A solid phase component of an
assay is distinguished from inert solid surfaces in that a "solid
support" contains at least one moiety on its surface, which is
intended to interact chemically with a molecule. A solid phase may
be a stationary component, such as a chip, tube, strip, cuvette, or
microtiter plate, or may be non-stationary components, such as
beads and microparticles. Microparticles can also be used as a
solid support for homogeneous assay formats. A variety of
microparticles that allow both non-covalent or covalent attachment
of proteins and other substances may be used. Such particles
include polymer particles such as polystyrene and poly
(methylmethacrylate); gold particles such as gold nanoparticles and
gold colloids; and ceramic particles such as silica, glass, and
metal oxide particles. See for example Martin, C. R., et al.,
Analytical Chemistry-News & Features, May 1 (1998) 322A-327A,
which is incorporated herein by reference. In one embodiment the
solid support is sepharose.
[0189] The term "substantially the same" denotes that two values,
e.g. the retention times on an FcRn affinity chromatography column
of two different antibodies, are within 5% of each other, i.e. they
differ by less than 5%. For example, a first retention time of 80
minutes and a second retention time of 84 minutes are substantially
the same, whereas a retention time of 80 minutes and a retention
time of 85 minutes are not substantially the same, these retention
times are different. In one embodiment substantially the same
denotes that two values are within 3.5% of each other, i.e. they
differ by 3.5% or less. In one embodiment substantially the same
denotes that two values are within 2.5% of each other, i.e. they
differ by 2.5% or less. The smaller of the two values is taken as
basis for this calculation.
[0190] As used herein, "treatment" (and grammatical variations
thereof such as "treat" or "treating") refers to clinical
intervention in an attempt to alter the natural course of the
individual being treated, and can be performed either for
prophylaxis or during the course of clinical pathology. Desirable
effects of treatment include, but are not limited to, preventing
occurrence or recurrence of disease, alleviation of symptoms,
diminishment of any direct or indirect pathological consequences of
the disease, preventing metastasis, decreasing the rate of disease
progression, amelioration or palliation of the disease state, and
remission or improved prognosis. In some embodiments, antibodies or
Fc-region fusion polypeptides as reported herein are used to delay
development of a disease or to slow the progression of a
disease.
[0191] The term "valent" as used within the current application
denotes the presence of a specified number of binding sites in a
(antibody) molecule. As such, the terms "bivalent", "tetravalent",
and "hexavalent" denote the presence of two binding site, four
binding sites, and six binding sites, respectively, in a (antibody)
molecule. The bispecific antibodies as reported herein as reported
herein are in one preferred embodiment "bivalent".
[0192] The term "variable region" or "variable domain" refer to the
domain of an antibody heavy or light chain that is involved in
binding of the antibody to its antigen. The variable domains of the
heavy chain and light chain (VH and VL, respectively) of an
antibody generally have similar structures, with each domain
comprising four framework regions (FRs) and three hypervariable
regions (HVRs) (see, e.g., Kindt, T. J. et al. Kuby Immunology, 6th
ed., W.H. Freeman and Co., N.Y. (2007), page 91). A single VH or VL
domain may be sufficient to confer antigen-binding specificity.
Furthermore, antibodies that bind a particular antigen may be
isolated using a VH or VL domain from an antibody that binds the
antigen to screen a library of complementary VL or VH domains,
respectively. See, e.g., Portolano, S. et al., J. Immunol. 150
(1993) 880-887; Clackson, T. et al., Nature 352 (1991)
624-628).
[0193] The terms "variant", "modified antibody", and "modified
fusion polypeptide" denotes molecules which have an amino acid
sequence that differs from the amino acid sequence of a parent
molecule. Typically such molecules have one or more alterations,
insertions, or deletions. In one embodiment the modified antibody
or the modified fusion polypeptide comprises an amino acid sequence
comprising at least a portion of an Fc-region which is not
naturally occurring. Such molecules have less than 100% sequence
identity with the parent antibody or parent fusion polypeptide. In
one embodiment the variant antibody or the variant fusion
polypeptide has an amino acid sequence that has from about 75% to
less than 100% amino acid sequence identity with the amino acid
sequence of the parent antibody or parent fusion polypeptide,
especially from about 80% to less than 100%, especially from about
85% to less than 100%, especially from about 90% to less than 100%,
and especially from about 95% to less than 100%. In one embodiment
the parent antibody or the parent fusion polypeptide and the
variant antibody or the variant fusion polypeptide differ by one (a
single), two or three amino acid residue(s).
[0194] II. Methods as Reported Herein
[0195] The invention is based, at least in part, on the finding
that the charge distribution in the Fv domain influences
antibody-FcRn binding and results in additional interactions
between the antibody and the FcRn. This changes the FcRn binding
characteristics, especially with respect to the dissociation of the
antibody-FcRn complex at pH 7.4, thereby reducing FcRn-dependent
terminal half-life of the antibody.
[0196] a) The Neonatal Fc-Receptor (FcRn)
[0197] The neonatal Fc-receptor (FcRn) is important for the
metabolic fate of antibodies of the IgG class in vivo. The FcRn
functions to salvage wild-type IgG from the lysosomal degradation
pathway, resulting in reduced clearance and increased half-life. It
is a heterodimeric protein consisting of two polypeptides: a 50 kDa
class I major histocompatibility complex-like protein
(.alpha.-FcRn) and a 15 kDa .beta.2-microglobulin (.beta.2m). FcRn
binds with high affinity to the CH2-CH3 portion of the Fc-region of
an antibody of the class IgG. The interaction between an antibody
of the class IgG and the FcRn is pH dependent and occurs in a 1:2
stoichiometry, i.e. one IgG antibody molecule can interact with two
FcRn molecules via its two heavy chain Fc-region polypeptides (see
e.g. [16]).
[0198] Thus, an IgGs in vitro FcRn binding
properties/characteristics are indicative of its in vivo
pharmacokinetic properties in the blood circulation.
[0199] In the interaction between the FcRn and the Fc-region of an
antibody of the IgG class different amino acid residues of the
heavy chain CH2- and CH3-domain are participating. The amino acid
residues interacting with the FcRn are located approximately
between EU position 243 and EU position 261, approximately between
EU position 275 and EU position 293, approximately between EU
position 302 and EU position 319, approximately between EU position
336 and EU position 348, approximately between EU position 367 and
EU position 393, at EU position 408, and approximately between EU
position 424 and EU position 440. More specifically the following
amino acid residues according to the EU numbering of Kabat are
involved in the interaction between the Fc-region and the FcRn:
F243, P244, P245 P, K246, P247, K248, D249, T250, L251, M252, I253,
S254, R255, T256, P257, E258, V259, T260, C261, F275, N276, W277,
Y278, V279, D280, V282, E283, V284, H285, N286, A287, K288, T289,
K290, P291, R292, E293, V302, V303, S304, V305, L306, T307, V308,
L309, H310, Q311, D312, W313, L314, N315, G316, K317, E318, Y319,
I336, S337, K338, A339, K340, G341, Q342, P343, R344, E345, P346,
Q347, V348, C367, V369, F372, Y373, P374, S375, D376, I377, A378,
V379, E380, W381, E382, S383, N384, G385, Q386, P387, E388, N389,
Y391, T393, S408, S424, C425, S426, V427, M428, H429, E430, A431,
L432, H433, N434, H435, Y436, T437, Q438, K439, and S440.
[0200] Site-directed mutagenesis studies have proven that the
critical binding sites in the Fc-region of IgGs for FcRn are
Histidine 310, Histidine 435, and Isoleucine 253 and to a lesser
extent Histidine 433 and Tyrosine 436 (see e.g. Kim, J. K., et al.,
Eur. J. Immunol. 29 (1999) 2819-2825; Raghavan, M., et al.,
Biochem. 34 (1995) 14649-146579; Medesan, C., et al., J Immunol.
158 (1997) 2211-2217).
[0201] Methods to increase IgG binding to FcRn have been performed
by mutating IgG at various amino acid residues: Threonine 250,
Methionine 252, Serine 254, Threonine 256, Threonine 307, Glutamic
acid 380, Methionine 428, Histidine 433, and Asparagine 434 (see
Kuo, T. T., et al., J. Clin. Immunol. 30 (2010) 777-789).
[0202] In some cases antibodies with reduced half-life in the blood
circulation are desired. For example, drugs for intravitreal
application should have a long half-life in the eye and a short
half-life in the circulation of the patient. Such antibodies also
have the advantage of increased exposure to a disease site, e.g. in
the eye.
[0203] Different mutations that influence the FcRn binding and
therewith the half-life in the blood circulation are known.
Fc-region residues critical to the mouse Fc-mouse FcRn interaction
have been identified by site-directed mutagenesis (see e.g.
Dall'Acqua, W. F., et al. J. Immunol 169 (2002) 5171-5180).
Residues I253, H310, H433, N434, and H435 (EU numbering according
to Kabat) are involved in the interaction (Medesan, C., et al.,
Eur. J. Immunol. 26 (1996) 2533-2536; Firan, M., et al., Int.
Immunol. 13 (2001) 993-1002; Kim, J. K., et al., Eur. J. Immunol.
24 (1994) 542-548). Residues I253, H310, and H435 were found to be
critical for the interaction of human Fc with murine FcRn (Kim, J.
K., et al., Eur. J. Immunol. 29 (1999) 2819-2825). Residues M252Y,
S254T, T256E have been described by Dall'Acqua et al. to improve
FcRn binding by protein-protein interaction studies (Dall'Acqua, W.
F., et al. J. Biol. Chem. 281 (2006) 23514-23524). Studies of the
human Fc-human FcRn complex have shown that residues I253, S254,
H435, and Y436 are crucial for the interaction (Firan, M., et al.,
Int. Immunol. 13 (2001) 993-1002; Shields, R. L., et al., J. Biol.
Chem. 276 (2001) 6591-6604). In Yeung, Y. A., et al. (J. Immunol.
182 (2009) 7667-7671) various mutants of residues 248 to 259 and
301 to 317 and 376 to 382 and 424 to 437 have been reported and
examined. Exemplary mutations and their effect on FcRn binding are
listed in the following Table 1.
TABLE-US-00026 TABLE 1 Collocation of different Fc-region mutations
and their influence on FcRn-binding and in vivo half-life. effect
on half-life in the mutation FcRn binding circulation reference
H285 reduced reduced Kim, J. K., H310Q/H433N (murine) (in mouse)
Scand. J. (murine IgG1) Immunol. 40 (1994) 457- 465 I253A reduced
reduced Ghetie, V. and H310A (murine) (in mouse) Ward, E. S., H435A
Immunol. H436A Today 18 (murine IgG1) (1997) 592- 598
T252L/T254S/T256F increased increased Ghetie, V. and
T252A/T254S/T256A (murine) (in mouse) Ward, E. S., (murine IgG1)
Immunol. Today 18 (1997) 592- 598 I253A reduced reduced Medesan,
C., H310A (murine) (in mouse) etal., J. H435A Immunol. 158 H436A
(1997) 2211- H433A/N434Q 2217 (murine IgG1) I253A reduced reduced
Kim, J. K., H310A H310A: (in mouse) Eur. J. H435A <0.1 rel.
Immunol. 29 H435R binding to (1999) 2819- (human IgG1) muFcRn 2825
(murine) H433A 1.1 rel. Kim, J. K., (human IgG1) binding Eur. J. to
muFcRn, Immunol. 29 0.4 rel. (1999) 2819- binding 2825 huFcRn
(murine) I253A reduced reduced Shields, R. L., S254A <0.1
relative et al., J. Biol. H435A binding to Chem. 276 Y436A huFcRn
(2001) 6591- (human IgG1) 6604 R255A reduced reduced Shields, R.
L., K288A (human) et al., J. Biol. L309A Chem. 276 S415A (2001)
6591- H433A 6604 (human IgG1) P238A increased increased Shields, R.
L., T256A (human) et al., J. Biol. E272A Chem. 276 V305A (2001)
6591- T307A 6604 Q311A D312A K317A D376A A378Q E380A E382A S424A
N434A K288A/N434A E380A/N434A T307A/E380A/N434A (human IgG1) H435A
reduced reduced Firan, M., et (humanized IgG1) <0.1 rel. al.,
Int. binding to Immunol. 13 huFcRn (2001) 993- 1002 I253A (no
binding) increased reduced Dall'Acqua, J. M252W (murine and (in
mouse) Immunol. 169 M252Y human) (2002) 5171- M252Y/T256Q 5180
M252F/T256D N434F/Y436H M252Y/S254T/T256E G385A/Q386P/N389S
H433K/N434F/Y436H H433R/N434Y/Y436H G385R/Q386T/P387R/ N389P
M252Y/S254T/T256E/ H433K/N434F/Y436H M252Y/S254T/T256E/
G385R/Q386T/P387R/ N389P (human IgG1) M428L increased increased
Hinton, P. R., T250Q/M428L (human) (in monkey) et al., J. Biol.
(human IgG2) Chem. 279 (2004) 6213- 6216 M252Y/S254T/T256E +
increased increased Vaccaro, C., et H433K/N434F (human) (in mouse)
al., Nat. (human IgG) Biotechnol. 23 (2005) 1283- 1288
T307A/E380A/N434A increased increased in Pop, L. M., et (chimeric
IgG1) transgenic al., Int. mouse Immunopharm acol. 5 (2005)
1279-1290 T250Q increased increased in Petkova, S. B., E380A
(human) transgenic et al., Int. M428L mouse Immunol 18 N434A (2006)
1759- K288A/N434A 1769 E380A/N434A T307A/E380A/N434A (human IgG1)
I253A reduced reduced in Petkova, S. B., (human IgG1) (human)
transgenic et al., Int. mouse Immunol 18 (2006) 1759- 1769
S239D/A330L/I332E increased increased in Dall'Acqua,
M252Y/S254T/T256E (human and Cynomolgus W. F., et al., J.
(humanized) Cynomolgus) Biol. Chem. 281 (2006) 23514-23524 T250Q
increased increased in Hinton, P. R., M428L (human) Rhesus et al.,
J. T250Q/M428L apes Immunol. 176 (human IgG1) (2006) 346- 356
T250Q/M428L increased no change in Datta- P257I/Q311I (mouse and
Cynomolgus Mannan, A., et (humanized IgG1) Cynomolgus) increased in
al., J. Biol. mouse Chem. 282 (2007) 1709- 1717 P257I/Q311I
increased reduced in mice Datta- P257I/N434H at pH 6 P257I/N434H
Mannan, A., et D376V/N434H (human, reduced in al., Drug (humanized
IgG1) Cynomolgus, Cynomolgus Metab. mouse) Dispos. 35 (2007) 86-94
abrogate FcRn binding: increased and reducing the Ropeenian, I253
reduced binding ability D. C. and H310 of IgG for FcRn Akilesh, S.,
H433 reduces its serum Nat. Rev. H435 persistence; a Immunol. 7
reduce FcRn binding: higher-affinity (2007) 715- Y436 FcRn-IgG 725
increased FcRn binding: interaction T250 prolongs the N252
half-lives of IgG S254 and Fc-coupled T256 drugs in the T307 serum
M428 N434 N434A increased increased in Yeung, Y. A., T307Q/N434A
(Cynomolgus Cynomolgus et al., Cancer T307Q/N434S monkey) monkey
Res. 70 (2010) V308P/N434A 3269-3277 T307Q/E380A/N434A (human IgG1)
256P increased at WO 2011/ 280K neutral pH 122011 339T 385H 428L
434W/Y/F/A/H (human IgG)
[0204] It has been found that the charge distribution in the Fv
domain influences antibody-FcRn binding and can result in
additional interactions between the antibody and the FcRn. This
changes the FcRn binding characteristics, especially with respect
to the dissociation of the antibody-FcRn complex at pH 7.4, thereby
influencing (reducing) FcRn-dependent terminal half-life of the
antibody.
[0205] The human neonatal Fc receptor (FcRn) plays an important
role in IgG catabolism. An IgGs in vitro FcRn binding
properties/characteristics are indicative of its in vivo
pharmacokinetic properties. Such in vitro methods would be of great
value during antibody development as repeated in vivo studies can
be avoided (reduced animal experiments, time and costs).
[0206] IgG-FcRn interactions can be analyzed using plasmon surface
resonance (SPR) assays (Wang, W., et al., Drug Metab. Disp. 39
(2011) 1469-1477; Datta-Mannan, A., et al., Drug Metab. Disp. 40
(2012) 1545-1555; Vaughn, D. E. and Bjorkman, P. J., Biochemistry
36 (1997) 9374-9380; Raghavan, M., et al., Proc. Natl. Acad. Sci.
USA 92 (1995) 11200-11204; Martin, W. L. and Bjorkman, P. J.,
Biochemistry 38 (1999) 12639-12647).
[0207] Calorimetric and asymmetrical flow field flow fractionation
methods have also been described for assessing IgG binding affinity
to FcRn (Huber, A. H., et al., J. Mol. Biol. 230 (1993) 1077-1083;
Pollastrini, J., et al., Anal. Biochem. 414 (2011) 88-98).
[0208] In addition of being complex assays, several studies
investigating the correlation between in vitro FcRn binding
parameters determined by SPR and the serum half-life of antibodies
in vivo failed so far to demonstrate such correlation despite
improved binding reaction conditions and appropriate modeling
(Gurbaxani, B., et al., Mol. Immunol. 43 (2006) 1462-1473;
Gurbaxani, B. M. and Morrison, S. L., Mol. Immunol. 43 (2006)
1379-1389; Gurbaxani, B., Clin. Immunol. 122 (2007) 121-124).
[0209] Engineering of the Fc-region of IgG1 to improve affinity of
IgG1 to FcRn at pH 6 and at neutral pH as measured by SPR
technology did not result in improved pharmacokinetics in
cynomolgus monkeys (Yeung, Y. A., et al., J. Immunol. 182 (2009)
7663-7671). However, only modest increases in pH 6 FcRn affinity in
the N434A IgG1 variant without concomitant significant binding to
FcRn at pH 7.4 resulted in improved pharmacokinetics in primates
demonstrating the importance of the FcRn release at pH 7.4 (see
Yeung, Y. A., above).
[0210] For example, SPR analysis of the IgG-FcRn interaction
provides a qualitative result indicating expected or aberrant
binding properties of a sample but does neither give a hint for the
cause of aberrant binding nor a quantitative estimation of the
amount of antibody with aberrant binding.
[0211] An FcRn affinity chromatography method using a positive
linear gradient elution has been reported in WO 2013/120929.
[0212] b) FcRn-Fab Charge-Mediated Interactions
[0213] Specific manipulation of the Fc-region is known to affect PK
parameters by altering interaction between the Fc-region and FcRn
and has been used to design therapeutic antibodies with specific PK
properties [33,34].
[0214] Although the influence of the Fab region on FcRn
interactions has recently been discussed when antibodies of the
same wild-type human Fc-region sequences but different Fab regions
showed differences in FcRn affinity and altered PK. The mechanism
of this interaction remained unclear [23,24].
[0215] To show the influencing factors of the Fab region to
FcRn-mediated IgG homeostasis the antibody pair Briakinumab
(Ozespa.TM.) and Ustekinumab (Stelara.TM.) were used as a model
system. Both Briakinumab and Ustekinumab are fully human monoclonal
IgG1 antibodies. They bind to the same human p40-subunit of
interleukin 12 (IL-12) and interleukin 23 (IL-23) [26] and they are
not cross-reactive to the corresponding mouse IL-12 and IL-23
[27,28]. Briakinumab and Ustekinumab are an IgG1.kappa. antibody
with variable heavy and light chain domains of the V.sub.H5 and
V.sub..kappa.1D germline families and an IgG1.lamda. antibody with
variable heavy and light chain domains of the V.sub.H3 and
V.sub..lamda.1 germline families, respectively. In addition to
different variable domains, Briakinumab and Ustekinumab show
differences in several allotype-specific amino acids in the
constant domains (see FIG. 5). However, these amino acid residues
are outside of the (cognate) FcRn binding regions and can therefore
be considered to play no role in FcRn-dependent PK [11].
Interestingly, Ustekinumab has a (reported) median terminal
half-life of 22 days [29], whereas Briakinumab has a terminal
half-life of only 8-9 days [26,30,31].
[0216] c) Charge Distribution and pH Dependent Net Charge
[0217] Briakinumab exhibits a non-uniform charge distribution at
physiological pH of 7.4 (see e.g. the published crystal structure
of Ustekinumab [27] and a homology model of Briakinumab).
Briakinumab shows a large positively charged region on the Fv
domain (see FIG. 1a) which is absent in Ustekinumab (see FIG. 1b).
Furthermore FcRn possesses a strong and extended negatively charged
region (see FIG. 1c) which is however not involved in cognate
Fc-region binding. Briakinumab and Ustekinumab have calculated
isoelectric points of 9.7 and 9.4, respectively. Moreover, the net
charge of Briakinumab is slightly more positive over the entire pH
range (see FIG. 1d).
[0218] FcRn binding affinity of Briakinumab and Ustekinumab at pH
6.0 is comparable, i.e. both values differ at most by one order or
magnitude, in one embodiment at most 5-fold, whereas the
dissociation from the FcRn is very different. Using variants of
Briakinumab and Ustekinumab, it could be shown that the interaction
is predominantly electrostatic and correlates with the extent of a
positively charged region (see below).
[0219] d) pH-Dependent FcRn-IgG Interaction
[0220] Ten variants of Briakinumab and Ustekinumab have been
synthesized and characterized with respect to their FcRn binding
properties by FcRn affinity chromatography (see Table 2). In the
variants the variable regions have been modified and tested for
FcRn pH 6 binding affinity and FcRn dissociation using surface
plasmon resonance (SPR) and FcRn affinity chromatography (see Table
3), respectively.
TABLE-US-00027 TABLE 3 FcRn binding affinities and charge
distributions of all tested antibodies. Antibodies are sorted
according to the FcRn column retention times. The equilibrium
dissociation constant K.sub.D was calculated as steady state
affinity and normalized to the K.sub.D of Ustekinumab. Comparison
of relative K.sub.D values (Ustekinumab = 1) are presented as the
mean (n = 3) .+-. standard deviation (SD). Isoelectric points and
the net charges of the Fv domains at pH 6.0 and pH 7.4 were
calculated (SaWI-Tools). FcRn column retention times do not
correlate with the isoelectric point or the net charge of the Fv
domain at pH 6.0 or pH 7.4. name Ustekinumab mAb 1 mAb 4 mAb 5 mAb
6 mAb 9 mAb 8 mAb 7 mAb 3 mAb 2 Briakinumab ret. time 84.3 84.3
84.5 85.1 86.2 86.2 90.1 90.4 92.4 93.0 93.7 [min] rel. K.sub.D
1.00 1.0 .+-. 0.5 .+-. 0.9 .+-. 0.4 .+-. 0.4 .+-. 0.4 .+-. 0.2 .+-.
0.2 .+-. 0.3 .+-. 0.2 .+-. 0.22 0.08 0.16 0.17 0.04 0.07 0.03 0.06
0.19 0.07 calc. pI 9.4 9.5 9.5 9.6 9.4 9.4 9.3 9.4 9.5 9.4 9.7
(IgG) q(VL) 2.1 2.1 2.1 2.1 3.9 0.8 3.8 3.8 3.8 3.8 3.8 pH 6.0
q(VL) 1.9 1.9 1.9 1.9 3.0 0.0 3.0 3.0 3.0 3.0 3.0 pH 7.4 q(VH) 3.1
3.1 6.4 4.1 5.4 6.4 1.4 3.4 3.1 6.4 6.4 pH 6.0 q(VH) 2.9 2.9 4.3
3.9 3.3 4.3 -0.7 1.3 2.9 4.3 4.3 pH 7.4 q(Fv) 5.2 5.2 8.4 6.1 9.2
7.2 5.2 7.2 6.9 10.2 10.2 pH 6.0 q(Fv) 4.9 4.9 6.2 5.9 6.3 4.3 2.3
4.3 6.0 7.3 7.3 pH 7.4
[0221] The FcRn binding affinities at pH 6 fell in a narrow range
for all eleven antibodies (see Table 3). The equilibrium
dissociation constant (K.sub.D) was calculated relative to
Ustekinumab (Ustekinumab=1.0). Briakinumab had a relative K.sub.D
of 0.2 and the nine variants ranged between Briakinumab and
Ustekinumab. Thus, it can be concluded that different terminal in
vivo half-life are not caused by different FcRn binding at pH
6.0.
[0222] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction in an
antibody-Fc-FcRn complex influencing the in vivo half-life of the
antibody comprising the following steps: [0223] a) determining for
a variant antibody and its parent antibody the K.sub.D values at pH
6 using surface plasmon resonance, [0224] b) determining the
retention time of the variant antibody and its parent antibody on
an FcRn affinity chromatography column with a positive linear pH
gradient elution in the presence of a high salt concentration,
whereby the presence of antibody-Fab-FcRn interaction in an
antibody-Fc-FcRn complex influencing the in vivo half-life is
determined if the K.sub.D values differ by at most a factor of 10
and the retention time determined in step b) between the variant
antibody and its parent antibody are substantially different.
[0225] One aspect as reported herein is a method for determining
the relative in vivo half-life of an antibody comprising the
following steps: [0226] a) determining for a variant antibody and
its parent antibody the K.sub.D values at pH 6 using surface
plasmon resonance, [0227] b) determining the retention time of the
variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration,
[0228] whereby the antibody has a relative in vivo half-life that
is reduced compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is shorter/smaller than the
retention time of its parent antibody, and
[0229] whereby the antibody has a relative in vivo half-life that
is increased compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is longer/bigger than the
retention time of its parent antibody.
[0230] One aspect as reported herein is a method for determining an
increase or a decrease of the vivo half-life of an antibody
comprising the following steps: [0231] a) determining for a variant
antibody and its parent antibody the K.sub.D values at pH 6 using
surface plasmon resonance, [0232] b) determining the retention time
of the variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration,
[0233] whereby the antibody has a decrease of the vivo half-life
compared to its parent antibody if the K.sub.D values differ by at
most a factor of 10 and the retention time determined in step b) of
the variant antibody is shorter/smaller than the retention time of
its parent antibody, and
[0234] whereby the antibody has an increase of the in vivo
half-life compared to its parent antibody if the K.sub.D values
differ by at most a factor of 10 and the retention time determined
in step b) of the variant antibody is longer/bigger than the
retention time of its parent antibody.
[0235] The elution profiles of the twelve antibodies were analyzed
using an FcRn affinity column with positive linear pH gradient
elution (see FIG. 2). Ustekinumab and mAb 1, which bears the Fv
domain of Ustekinumab on the constant parts of Briakinumab, showed
indistinguishable retention times of around 84 minutes, showing
that the Fv domain influences the interaction with the FcRn.
Briakinumab, on the other hand, eluted at a retention time of 94
minutes and therefore had a clearly different retention time
compared to Ustekinumab. The indistinguishable retention times of
the IdeS-cleaved Fc-regions of Briakinumab (85.7 min) and
Ustekinumab (85.2 min) indicated the negligible role of the
Fc-region. MAb 4 containing Ustekinumab LCs (LC=light chain,
HC=heavy chain) and Briakinumab HCs had a retention time close to
Ustekinumab, showing the impact of the LC on FcRn binding.
[0236] Variant antibodies mAb 5 and mAb 6 bear Ustekinumab CDRs
(heavy and light chain parts) on the Briakinumab framework and vice
versa. Grafting Ustekinumab CDRs on Briakinumab (mAb 5) shifted the
retention time of mAb 5 close to that of Ustekinumab. Grafting
Briakinumab CDRs on Ustekinumab (mAb 6) described/presented an
elution profile which was still close to Ustekinumab.
[0237] A strong retention time shift from Briakinumab in the
direction of Ustekinumab was observed for mAb 9 that is a
Briakinumab variant in which three positively charged residues in
the light chain CDRs were mutated to alanine residues.
[0238] Three and five positively charged residues in the heavy
chain of Briakinumab were mutated in mAb 7 and mAb 8, respectively.
In these variants the retention time shifted relative to
Briakinumab.
[0239] MAb 3, comprising the HCs of Ustekinumab and the LCs of
Briakinumab, as well as mAb 2 containing the Fv domain of
Briakinumab on the Ustekinumab constant domains both eluted close
to Briakinumab.
[0240] Taken together, the data shows that the Fv domain influences
FcRn dissociation and not FcRn binding (at pH 6.0).
[0241] The FcRn column retention times were aligned with
isoelectric points and net charges of the antibodies. No
correlation between the FcRn column retention times and the
isoelectric points or the net charges of the Fv domains at
lysosomal pH 6.0 or physiological pH 7.4 can be seen (see Table 3).
However, the measured FcRn column retention times increased with
the extent of positively charged regions, especially around the
light chain variable domains (see FIG. 2).
[0242] One aspect as reported herein is a method for increasing the
in vivo half-life of an antibody comprising the step of: [0243]
changing a charged amino acid residue at the positions 27, 55 and
94 in the light chain of an antibody to a hydrophobic or neutral
hydrophilic amino acid residue (numbering according to Kabat) and
thereby increasing the in vivo half-life of the antibody.
[0244] Amino acids may be grouped according to common side-chain
properties: [0245] (1) hydrophobic: Norleucine, Met, Ala, Val, Leu,
Ile; [0246] (2) neutral hydrophilic: Cys, Ser, Thr, Asn, Gln;
[0247] (3) acidic: Asp, Glu; [0248] (4) basic: His, Lys, Arg;
[0249] (5) residues that influence chain orientation: Gly, Pro;
[0250] (6) aromatic: Trp, Tyr, Phe.
[0251] Acidic and basic amino acid residues together for the group
of charged amino acid residues.
[0252] FcRn column retention times were also determined in a
different set up with increased ionic strength in the mobile phase,
i.e. in the presence of increased salt concentrations.
Charge-mediated interactions are known to be weakened under high
ionic strength conditions, whereas hydrophobic interactions are
typically strengthened by salt. It has been found that the FcRn
column retention time of Briakinumab was shortened in the presence
of salt and was proportional to the inverse square root of the
ionic strength as suggested by the Debye-Huckel law of charge
screening [32]. The retention time of Ustekinumab remained
essentially unaffected (see FIG. 6). Thus, a significant part of
the excessive FcRn-Briakinumab interaction is charge-mediated.
[0253] Summarizing the above, FcRn affinity chromatography of the
engineered variants showed that antibodies with the same Fv domain
(mAb 1 & mAb 2) and the same LC (mAb 3 & mAb 4) elute at
nearly identical FcRn column retention times. Furthermore, grafting
Ustekinumab CDRs on Briakinumab (mAb 5) shifts the elution pH close
to that of Ustekinumab. Thus, the light chain CDRs provide the main
influence on Briakinumab's FcRn binding.
[0254] Grafting Briakinumab CDRs on Ustekinumab (mAb 6) presented
an elution profile which was still close to Ustekinumab. Thus,
without being bound by this theory it could be that the
antibody-FcRn interaction is more affected by disrupting the large
positively charged region of Briakinumab than by creating a smaller
positively charged region. As suggested by the MD simulation (see
below), a direct, stabilizing interaction between a positively
charged Fv region and a negatively charged region on FcRn is
readily feasible. Thus, FcRn-Fv interaction may lead to a
slower-than-normal dissociation of the FcRn-IgG complex under
physiological conditions.
[0255] e) Correlation of the FcRn Elution pH on Pharmacokinetics in
Human FcRn Transgenic Mice
[0256] Previous studies have discussed net charge to be a driving
force for altered pharmacokinetic properties by affecting the
electrostatic interaction between the antibody and negatively
charged groups on the surface of endothelial cells [35,36]. For
example, Igawa et al. [37] observed that IgG4 antibodies with lower
isoelectric points (pI) due to engineering in the variable region
have a lower rate of fluid-phase pinocytosis and in turn a reduced
elimination rate. Furthermore, Boswell et al. [38] proposed the pI
differences needed to be at least of one unit to influence PK.
[0257] The pIs of Briakinumab, Ustekinumab, mAb 8 and mAb 9 vary
between 9.3 and 9.7. Therefore, it can be assumed that the
influence on fluid-phase pinocytosis is minimal due to pI
differences. However, Briakinumab's shorter FcRn column retention
times under high ionic strength conditions (see above) as well as
the higher electrostatic contribution to the FcRn-Fv interaction
compared to Ustekinumab in the MD simulation (see below) show that
specifically located charge may be the main influencing factor on
the FcRn-IgG interaction. The influence of charge in the Fv domain
was analyzed using mutants which have three (mAb 7) and five (mAb
8) positively charged residues in the HC of Briakinumab mutated as
well as Briakinumab with three positively charged residues mutated
in the light chain CDRs (mAb 9). MAb 7 and mAb 8 show small
retention time shifts in the direction of Ustekinumab confirming a
charge-mediated interaction, whereas mAb 9 shows a high retention
time shift in the direction of Ustekinumab. Thus, specifically
located charge(s) in the light chain CDRs strongly influence FcRn
dissociation.
[0258] To assess whether the effect of mutated charged residues in
the variable domains of Briakinumab on FcRn binding translates into
modulated in vivo PK properties PK studies in human FcRn-transgenic
mice were conducted. Briakinumab and Ustekinumab, together with two
variants of Briakinumab (mAb 8 and mAb 9), which had FcRn column
retention times between Briakinumab and Ustekinumab, were tested.
The distribution and elimination processes of the four antibodies
are in agreement with other IgG PK studies (see FIG. 3a).
Briakinumab showed a faster decrease in the .alpha.-phase than the
other antibodies. Interestingly, Briakinumab and Ustekinumab showed
terminal half-life of 48 hours and 137 hours, respectively (see
FIG. 3b). The variants mAb 8 and mAb 9, which have smaller
positively charged regions in the Fv domain, had terminal half-life
of 78 hours and 109 hours, respectively. A statistically
significance could be detected between the terminal half-life of
Briakinumab and Ustekinumab, Briakinumab and mAb 9 as well as
Ustekinumab and mAb 8. Ustekinumab, mAb 9, mAb 8, and Briakinumab
eluted at 84.3, 86.2, 90.1 and 93.7 minutes corresponding to an
elution pH of 7.4, 7.5, 7.7 and 7.9, respectively. Thus, it has
been found that the terminal half-life of the four IgGs is linearly
correlated with the in vitro FcRn column elution pH values (see
FIG. 3b).
[0259] In the PK experiments the terminal half-life was examined,
which is exclusively calculated in the elimination phase where FcRn
recycling dominates [39]. The terminal half-life of the four
antibodies correlate linearly with the in vitro FcRn column elution
pH: The higher the FcRn column elution pH the shorter the terminal
half-life, thereby demonstrating that the FcRn column is a
predictive/sensitive tool for in vitro FcRn dissociation. The
correlation between terminal half-life and the FcRn column elution
pH confirms the importance of the fast FcRn-IgG dissociation at
physiological pH.
[0260] Without being bound by this theory the FcRn-IgG complex is
built in the endosomes at pH 6.0, therefore, less binding results
in less IgG-recycling and faster clearance. By exocytosis the
FcRn-IgG complex is released to the plasma membrane, where the
dissociation of the IgG and the FcRn has to take place at a
physiological pH of 7.4 within a short period of time [40].
Consequently, dissociation at physiological pH is also important
for a prolonged half-life [22,40].
[0261] Thus, it has been found that the dissociation at higher
pH-values indicates a slower dissociation from the FcRn. This could
without being bound by this theory lead to degradation of the
antibodies in the lysosome instead of releasing the antibodies back
to blood circulation.
[0262] Thus, it has been found that charge in the Fv domain of an
IgG affects the terminal half-life by altering the interaction
between the IgG and FcRn. The structural parts of the Fab which
interact with FcRn have been located and it has been demonstrated
that the interaction is charge-mediated. The PK study revealed a
linear correlation between the in vitro FcRn-IgG dissociation and
the terminal half-life in vivo.
[0263] f) Molecular Dynamics (MD) Simulation of FcRn-IgG Models
[0264] A homology model of a human FcRn-Fc complex was generated
using the published rat FcRn structure as a template. The position
of the Fv domains of Briakinumab and Ustekinumab was modeled based
on the crystal structure of a complete IgG1 (PDB code 1HZH). These
homology models contain two copies of FcRn (.alpha.-FcRn with
.beta..sub.2m) on one complete IgG molecule (see FIG. 4a). The
distance between FcRn and the Fv domains is >40 .ANG. in the
starting structure and exceeds the Debye length of approx. 8 .ANG.
under physiological conditions [32]. The dynamics of the FcRn-IgG
complexes were simulated by molecular dynamics simulation over a
period of 100 ns in explicit water and physiological ionic
strength. During the course of the simulation, one of the two Fab
regions approached the tip of FcRn and persisted in this
conformation for the rest of the simulation time (see FIG. 4b, c,
d). The region on FcRn found to interact with the Fv domain had
hitherto not been described as being involved in IgG binding.
Surprisingly, in the MD simulations not only Briakinumab but also
Ustekinumab assumed a conformation with Fv and FcRn interacting
with one another (see FIG. 4b, c). It has been found that in both
complexes, two different pairs of Fv and FcRn domains in the
asymmetric starting structure approached each other. The
electrostatic contribution to the FcRn-Fv interaction was found to
be about twice as high in Briakinumab as in Ustekinumab (see FIG.
4e).
[0265] In summary, it has been found that the intrinsic flexibility
of Fab arms of FcRn-IgG complexes structurally allows a direct,
stabilizing interaction of the Fv domain with the tip of FcRn.
[0266] g) The Methods According to the
[0267] Current Invention
[0268] g.i) Elution with Linear Positive pH Gradient at Different
Salt Concentrations
[0269] Herein is reported a method comprising the following two
steps: [0270] a) determining the retention time of the antibody on
an FcRn affinity chromatography column with a positive linear pH
gradient elution in the presence of a first salt concentration,
[0271] b) determining the retention time of the antibody on an FcRn
affinity chromatography column with a positive linear pH gradient
elution in the presence of a second salt concentration.
[0272] The second salt concentration is generally higher/bigger
than the first salt concentration, so that these concentrations are
not about identical, i.e. they differ by at least 10%, in one
embodiment by at least 20%.
[0273] With this method it is possible to determine the presence of
antibody-Fab-FcRn interaction in an antibody-Fc-FcRn complex in a
simple chromatography method by comparing the retention times
obtained in the presence of different salt concentrations (see FIG.
13) or by comparing the retention time of the full antibody and its
Fc-region. This is important as antibody-Fab-FcRn interactions
influence the in vivo half-life of the antibody.
[0274] For antibody/reference antibody pairs different relations
with respect to their retention times on an FcRn affinity
chromatography column and therewith with respect to their FcRn
interaction exist: [0275] 1) the antibody and the reference
antibody have substantially the same retention time in step a) and
step b): in this case the in vivo half-life of both antibodies
should be substantially the same, i.e. the in vivo half-life is not
influenced by antibody-Fab-FcRn interactions, or [0276] 2) the
antibody and the reference antibody have substantially the same
retention time in step a) but a different retention time in step
b): in this case the in vivo half-life of the antibody is shorter
than the in vivo half-life of the reference antibody, i.e. the in
vivo half-life is influenced by antibody-Fab-FcRn interactions.
[0277] The antibody can be a variant antibody of a parent antibody
in which case the reference antibody is the parent antibody.
[0278] In one case the reference antibody is an antibody that has
substantially the same retention time as its Fc-region after IdeS
cleavage or papain cleavage.
[0279] In order to provide therapeutic regimens to treat the
diversity of diseases known today and also those that will be
revealed in the future a need for tailor made antibodies as well as
Fc-region containing polypeptides exists.
[0280] To tailor make the FcRn binding characteristics of an
antibody the residues involved in FcRn interaction are modified and
the resulting modified antibodies have to be tested. If the
required characteristics are not met the same process is performed
again.
[0281] Thus, it would be advantageous to provide a method that
predicts the changes in the characteristic properties of a modified
antibody based on a simple chromatographical method and which does
not require in vivo studies to analyze the changes of the
characteristics in the modified antibody.
[0282] In some cases antibodies with extended half-life are
desired. For example, drugs with an extended half-life in the
circulation of a patient in need of a treatment require decreased
dosing or increased dosing intervals. Such antibodies also have the
advantage of increased exposure to a disease site, e. g. a
tumor.
[0283] The in vivo half-life correlates with the retention time on
an FcRn affinity chromatography column. This is especially true if
the interaction between the antibody and the FcRn is almost solely
mediated by the residues in the antibody Fc-region. But if residues
outside the antibody Fc-region, e.g. in the antibody-Fab, also
interact with the FcRn this correlation has to be further
confirmed. This can be done with the method as reported herein
exploiting the change in retention time in an FcRn affinity
chromatography method with a positive linear pH gradient elution in
the presence of low and high salt concentrations or of the intact
antibody and the Fv-region cleaved antibody (=Fc-region). If the
retention time is substantially not affected by the change from low
to high salt concentration or by the cleavage of the Fc-region then
no antibody-Fab-FcRn interaction is present and a higher retention
time on the FcRn affinity chromatography column correlates with an
increased half-life in vivo. But if the retention time is affected,
especially if it is reduced, by a change from low to high salt
concentrations or by cleavage of the Fc-region then the in vivo
half-life correlates differently to the retention time on the FcRn
affinity chromatography column, i.e. a longer retention time on the
FcRn affinity chromatography column correlates to a shorter in vivo
half-life due to reduced antibody-FcRn dissociation at
physiological pH and, without being bound by this theory, an
increased lysosomal degradation of the antibody.
[0284] The herein used FcRn affinity chromatography column
comprises a matrix and matrix bound chromatographical functional
groups, wherein the matrix bound chromatographical functional group
comprises a non-covalent complex of neonatal Fc receptor (FcRn) and
beta-2-microglobulin.
[0285] Generally, starting point for the method as reported herein
is a parent or reference antibody that is characterized by its
binding to the FcRn.
[0286] One aspect as reported herein is the use of a method as
reported herein for determining the presence of antibody-Fab-FcRn
interaction in an antibody-Fc-FcRn complex influencing the in vivo
half-life comprising the following steps: [0287] a) determining the
retention time of the antibody on an FcRn affinity chromatography
column with a positive linear pH gradient elution in the presence
of a first salt concentration, [0288] b) determining the retention
time of the antibody on an FcRn affinity chromatography column with
a positive linear pH gradient elution in the presence of a second
salt concentration,
[0289] whereby the presence of antibody-Fab-FcRn interaction in an
antibody-Fc-FcRn complex influencing the in vivo half-life is
determined if the retention time determined in step a) and the
retention time determined in step b) are substantially
different.
[0290] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction in an
antibody-Fc-FcRn complex influencing the in vivo half-life
comprising the following steps: [0291] a) determining the retention
time of the antibody on an FcRn affinity chromatography column with
a positive linear pH gradient elution in the presence of a first
salt concentration, [0292] b) determining the retention time of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of a second salt
concentration,
[0293] whereby the presence of antibody-Fab-FcRn interaction in an
antibody-Fc-FcRn complex influencing the in vivo half-life is
determined if the retention time determined in step a) and the
retention time determined in step b) are substantially
different.
[0294] Variant antibodies show either increased or decreased
binding to FcRn when compared to a parent antibody polypeptide or
compared to a reference antibody, and, thus, have a modified
half-life compared to the parent/reference antibody in serum.
[0295] Generally, Fc-region variants with increased affinity for
the FcRn (i.e. increased retention time on an FcRn column compared
to a parent antibody or reference antibody) are predicted at first
to have longer serum half-life compared to those with decreased
affinity for the FcRn (i.e. with reduced retention time on an FcRn
column compared to a parent antibody or reference antibody).
[0296] This predicted in vivo half-life has to be confirmed
thereafter. For this confirmation the method as reported herein can
be used.
[0297] Antibody variants with increased in vivo half-life have
applications in methods of treating mammals, especially humans,
where long half-life of the administered antibody is desired, such
as in the treatment of a chronic disease or disorder.
[0298] Antibody variants with decreased affinity for the FcRn have
applications in methods of treating mammals, especially humans,
where a short half-life of the administered antibody or fusion
polypeptide is desired, such as in vivo diagnostic imaging.
[0299] It is very likely that antibody variants with decreased FcRn
binding affinity will be able to cross the placenta and, thus, can
be used in the treatment of diseases or disorders in pregnant women
especially of unborn children. In addition, reduced FcRn binding
affinity may be desired for those drugs intended for
application/transport to the brain, kidney, and/or liver.
[0300] One aspect as reported herein is the use of a method as
reported herein for identifying antibodies that exhibit reduced
transport across the epithelium of kidney glomeruli from the
vasculature.
[0301] One aspect as reported herein is the use of a method as
reported herein for identifying antibodies that exhibit reduced
transport across the blood brain barrier from the brain into the
vascular space.
[0302] In one embodiment of all aspects as reported herein the FcRn
is selected from human FcRn, cynomolgus FcRn, mouse FcRn, rat FcRn,
sheep FcRn, dog FcRn, pig FcRn, minipig FcRn, and rabbit FcRn.
[0303] In one embodiment of all aspects as reported herein the
beta-2-microglobulin is from the same species as the FcRn.
[0304] In one embodiment of all aspects as reported herein the
beta-2-microglobulin is from a different species as the FcRn.
[0305] In one embodiment the parent antibody comprises at least one
binding domain and at least one Fc-region. In one embodiment the
parent antibody comprises two binding domains and two
Fc-regions.
[0306] In one embodiment the parent antibody comprises at least one
binding domain that specifically binds to a target which mediates a
biological effect (in one embodiment a ligand capable of binding to
a cell surface receptor or a cell surface receptor capable of
binding a ligand) and mediates transmission of a negative or
positive signal to a cell. In one embodiment the parent antibody
comprises at least one binding domain specific for an antigen
targeted for reduction or elimination (in one embodiment a cell
surface antigen or a soluble antigen) and at least one
Fc-region.
[0307] Antibodies specifically binding to a target can be raised in
mammals by multiple subcutaneous or intraperitoneal injections of
the relevant antigen (e.g. purified antigen, cells or cellular
extracts comprising such antigens, or DNA encoding for such
antigen) and optionally an adjuvant.
[0308] In one embodiment the antibody is a full length
antibody.
[0309] In one embodiment the antibody is a monoclonal antibody.
[0310] In one embodiment the parent antibody is a bispecific
antibody.
[0311] In one embodiment the parent antibody is a chimeric
antibody.
[0312] In one embodiment of all previous aspects the pH is a
gradient from about pH 5.5 to about pH 8.8.
[0313] In general the soluble extracellular domain of FcRn (SEQ ID
NO: 33 for human FcRn) with C-terminal His-Avi Tag (SEQ ID NO: 34)
was co-expressed with .beta..sub.2-microglobulin (SEQ ID NO: 35 for
human beta-2-microglobulin) in mammalian cells. The non-covalent
FcRn-microglobulin complex was biotinylated and loaded onto
streptavidin derivatized sepharose.
[0314] In one embodiment of all aspects as reported herein the
non-covalent complex of neonatal Fc receptor (FcRn) and
beta-2-microglobulin is bound to a solid phase.
[0315] In one embodiment the conjugation of the non-covalent
complex to the solid phase is performed by chemically binding via
N-terminal and/or c-amino groups (lysine), .epsilon.-amino groups
of different lysins, carboxy-, sulfhydryl-, hydroxyl-, and/or
phenolic functional groups of the amino acid backbone of the
antibody, and/or sugar alcohol groups of the carbohydrate structure
of the antibody.
[0316] In one embodiment the non-covalent complex is conjugated to
the solid phase via a specific binding pair. In one embodiment the
non-covalent complex is conjugated to biotin and immobilization to
a solid support is performed via solid support immobilized avidin
or streptavidin.
[0317] A specific binding pair (first component/second component)
is in one embodiment selected from streptavidin or avidin/biotin,
antibody/antigen (see, for example, Hermanson, G. T., et al.,
Bioconjugate Techniques, Academic Press (1996)),
lectin/polysaccharide, steroid/steroid binding protein,
hormone/hormone receptor, enzyme/substrate, IgG/Protein A and/or G,
etc.
[0318] In principle any buffer substance can be used in the methods
as reported herein.
[0319] Fc residues critical to the mouse Fc-mouse FcRn interaction
have been identified by site-directed mutagenesis (see e.g.
Dall'Acqua, W. F., et al. J. Immunol 169 (2002) 5171-5180).
Residues I253, H310, H433, N434, and H435 (EU numbering according
to Kabat) are involved in the interaction (Medesan, C., et al.,
Eur. J. Immunol. 26 (1996) 2533; Firan, M., et al., Int. Immunol.
13 (2001) 993; Kim, J. K., et al., Eur. J. Immunol. 24 (1994) 542).
Residues I253, H310, and H435 were found to be critical for the
interaction of human Fc with murine FcRn (Kim, J. K., et al., Eur.
J. Immunol. 29 (1999) 2819). Residues M252Y, S254T, T256E have been
described by Dall'Acqua et al. to improve FcRn binding by
protein-protein interaction studies (Dall'Acqua, W. F., et al. J.
Biol. Chem. 281 (2006) 23514-23524). Studies of the human Fc-human
FcRn complex have shown that residues I253, S254, H435, and Y436
are crucial for the interaction (Firan, M., et al., Int. Immunol.
13 (2001) 993; Shields, R. L., et al., J. Biol. Chem. 276 (2001)
6591-6604). In Yeung, Y. A., et al. (J. Immunol. 182 (2009)
7667-7671) various mutants of residues 248 to 259 and 301 to 317
and 376 to 382 and 424 to 437 have been reported and examined.
TABLE-US-00028 TABLE 4 Retention time of different antibodies
obtained with different elution buffers and gradients. retention
time [min] anti-HER2 anti- antibody method Ox40L anti-Abeta (I253H-
elution buffer based on Briakinumab Ustekinumab antibody antibody
mutant) 20 mM example 5 not not 43 44 not Tris/HCl, with determined
determined determined 50 mM NaCl, adjusted to pH 8.8 20 mM example
2 93.7 84.3 not not not Tris/HCl, with determined determined
determined 140 mM NaCl, adjusted to pH 8.8 20 mM example 5 not not
45 45.5 no binding Tris/HCl, with determined determined 150 mM
NaCl, adjusted to pH 8.8 20 mM example 5 not not 48 48.5 not HEPES,
with determined determined determined 150 mM NaCl, adjusted to pH
8.6 20 mM example 5 not not 42.5 43 not Tris/HCl, with determined
determined determined 300 mM NaCl, adjusted to pH 8.8 20 mM example
3 83.1 80.4 not not not Tris/HCl, with determined determined
determined 400 mM NaCl, adjusted to pH 8.8 The term YTE-mutant
denotes the triple mutant M252Y/S254T/T256E.
[0320] In one embodiment a pharmaceutically acceptable buffer
substance is used, such as e.g. phosphoric acid or salts thereof,
acetic acid or salts thereof, citric acid or salts thereof,
morpholine or salts thereof, 2-(N-morpholino) ethanesulfonic acid
(MES) or salts thereof, histidine or salts thereof, glycine or
salts thereof, tris (hydroxymethyl) aminomethane (TRIS) or salts
thereof, (4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid
(HEPES) or salts thereof.
[0321] In one embodiment the buffer substance is selected from
phosphoric acid or salts thereof, or acetic acid or salts thereof,
or citric acid or salts thereof, or histidine or salts thereof.
[0322] In one embodiment the buffer substance has a concentration
of from 10 mM to 500 mM.
[0323] In one embodiment the buffer substance has a concentration
of from 10 mM to 300 mM.
[0324] In one embodiment the buffer substance has a concentration
of from 10 mM to 250 mM.
[0325] In one embodiment the buffer substance has a concentration
of from 10 mM to 100 mM.
[0326] In one embodiment the buffer substance has a concentration
of from 15 mM to 50 mM.
[0327] In one embodiment the buffer substance has a concentration
of about 20 mM.
[0328] An exemplary starting solution for the positive linear pH
gradient comprises in one embodiment 20 mM MES and 140 mM NaCl,
adjusted to pH 5.5.
[0329] An exemplary final solution for the positive linear pH
gradient comprises in one embodiment 20 mM TRIS and 140 mM NaCl,
adjusted to pH 8.8.
[0330] During the gradient a mixture of the starting solution and
the final solution is applied to the FcRn affinity chromatography
column, whereby the positive linear gradient starts with 100% of
the starting solution (i.e. pure starting solution), thereafter the
fraction of the starting solution is reduced from 100% to 0% and
the fraction from the final solution is increased from 0% to 100%
so that after the positive linear pH gradient 100% of the final
solution is applied to the column.
[0331] In one embodiment the starting and the final solution
comprises an additional salt. In one embodiment the additional salt
is selected from sodium chloride, sodium sulphate, potassium
chloride, potassium sulfate, sodium citrate, or potassium citrate.
In one embodiment the solutions comprise of from 50 mM to 1000 mM
of the additional salt. In one embodiment the solutions comprise of
from 50 mM to 750 mM of the additional salt. In one embodiment the
solutions comprise of from 50 mM to 500 mM of the additional salt.
In one embodiment the solution comprise of from 50 mM to 750 mM of
the additional salt. In one embodiment the solution comprise about
140 mM to about 400 mM of the additional salt.
[0332] In one embodiment the starting and the final solution
comprises sodium chloride. In one embodiment the starting and the
final solution comprises of about 140 mM to about 400 mM sodium
chloride.
[0333] It has been found that the kind of salt and buffer substance
influences the retention time and the resolution. An optimal salt
concentration for binding of antibodies to FcRn can be determined
(140 mM NaCl). If the salt concentration is higher (400 mM) binding
to FcRn is reduced due to interference with the charge interactions
by the increase of the ionic strength of the solution and a shorter
retention time is obtained.
[0334] Thus, in the method as reported herein the solutions used in
step a) and step b) as well as the gradient applied in step a) and
step b) as well as the loading of the column in step a) and step b)
as well as the dimension of the column and the amount of FcRn
affinity chromatography material in step a) and step b) as well as
the FcRn affinity ligand density in the FcRn affinity
chromatography material in step a) and step b) as well as the
conjugation of the FcRn to the solid phase in step a) and step b)
as well as the nature of the b2m and FcRn in step a) and step b)
are the same or even identical. Thus, in the method as reported
herein the FcRn affinity chromatography in step a) and step b) are
performed under identical conditions except for the concentration
of the salt, which is different between step a) and step b). In one
embodiment the second salt concentration is bigger than the first
salt concentration. In one embodiment the second salt concentration
is at least twice the first salt concentration.
[0335] As can be seen from FIG. 7 the amount of applied antibody
shows a linear correlation to the area under the curve of the
eluted peak.
[0336] Eight antibodies were analyzed as complete antibody and
after cleavage with the enzyme IdeS. The cleavage was controlled by
SDS page and analytical SEC. Fc-region and antibody-Fab were
separated by preparative SEC.
TABLE-US-00029 TABLE 5 Comparison of retention times of complete
antibody, antibody-Fab and Fc-region. determined retention time
[min] according to complete Example antibody antibody Fc-region
antibody-Fab 5 anti-IGF-1R 44.5 45 no binding antibody 5
anti-IL13R.alpha. 44.5 45 no binding antibody 5 anti-HER2 45 45 no
binding antibody 5 anti-IL 6R 45 45 no binding antibody anti-Ox40L
5 antibody 45 45 no binding 2 Briakinumab 93.7 85.7 not determined
2 Ustekinumab 84.3 85.2 not determined
[0337] In general the retention time of antibodies having a
wild-type Fc-region (IgG1 or IgG2 or IgG4) varies between 45 and 49
min. (tested with 35 therapeutic antibodies against 36 antigens,
data not shown) under the conditions of Example 5. If the
conditions of Example 2 are used the retention time is increased to
about 85 min as the gradient is longer.
TABLE-US-00030 TABLE 6 Retention time with respect to amount of
immobilized FcRn receptor per gram of column material
(chromatography conditions of Example 5). elution buffer: retention
time [min] 20 mM Tris/HCl, with anti- 150 mM NaCl, Ox40L anti-Abeta
adjusted to pH 8.8 antibody antibody 1.2 mg FcRn/g 42.5 42.5 solid
phase 3 mg FcRn/g 45 45.5 solid phase 6 mg FcRn/g 48.5 49 solid
phase 12 mg FcRn/g 48.5 49 solid phase
[0338] In general the retention time in the methods and uses as
reported herein is depending on steepness of the pH gradient and
the employed salt concentration. If the wild-type antibody is used
as reference and a weaker binding is indicated by a shorter
retention time (=earlier elution) whereas a stronger binding is
indicated by a longer retention time (=later elution).
[0339] Different mutants in the Fc-region of the IgG behave
different on the FcRn column, displaying modified retention
times.
[0340] For example the anti-IGF-1R antibody mutant YTE shows an
increased retention time (see FIG. 8).
TABLE-US-00031 TABLE 7 Change of retention time with respect to
Fc-region mutations. antibody retention time [min] anti-IGF-1R
antibody 44.5 (wild-type) anti-IGF-1R antibody 57.5 (YTE-mutant)
The term YTE-mutant denotes the triple mutant
M252Y/S254T/T256E.
[0341] One aspect as reported herein is a method for determining
the relative in vivo half-life of an antibody comprising the
following steps: [0342] a) determining the retention time of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of a first salt
concentration, [0343] b) determining the retention time of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of a second salt
concentration,
[0344] whereby the antibody has a relative in vivo half-life that
is reduced compared to a standard/natural antibody of the IgG1,
IgG3 or IgG4 subclass if the retention time determined in step a)
and the retention time determined in step b) are substantially
different.
[0345] One aspect as reported herein is the use of the method as
reported herein for determining the relative in vivo half-life of
an antibody wherein the method comprises the following steps:
[0346] a) determining the retention time of the antibody on an FcRn
affinity chromatography column with a positive linear pH gradient
elution in the presence of a first salt concentration, [0347] b)
determining the retention time of the antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0348] whereby the antibody has a relative in vivo half-life that
is reduced compared to a standard/natural antibody of the IgG1,
IgG3 or IgG4 subclass if the retention time determined in step a)
and the retention time determined in step b) are substantially
different.
[0349] One aspect as reported herein is a method for determining an
increase or a decrease in the vivo half-life of a variant antibody
relative to its parent antibody comprising the following steps:
[0350] a) determining the retention time of the variant antibody
and its parent antibody on an FcRn affinity chromatography column
with a positive linear pH gradient elution in the presence of a
first salt concentration, [0351] b) determining the retention time
of the variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0352] whereby the in vivo half-life of the variant antibody
relative to its parent antibody is increased if i) the retention
time of the variant antibody determined in step a) is bigger/longer
than the retention time of its parent antibody determined in step
a), and ii) the retention time of the variant antibody determined
in step a) and the retention time of the variant antibody
determined in step b) are substantially the same,
[0353] whereby the in vivo half-life of the variant antibody
relative to its parent antibody is decreased if i) the retention
time of the variant antibody determined in step a) is
smaller/shorter than the retention time of its parent antibody
determined in step a), and ii) the retention time of the variant
antibody determined in step a) and the retention time of the
variant antibody determined in step b) are substantially the
same.
[0354] One aspect as reported herein is the use of a method as
reported herein for determining an increase or a decrease in the
vivo half-life of a variant antibody relative to its parent
antibody wherein the method comprises the following steps: [0355]
a) determining the retention time of the variant antibody and its
parent antibody on an FcRn affinity chromatography column with a
positive linear pH gradient elution in the presence of a first salt
concentration, [0356] b) determining the retention time of the
variant antibody and its parent antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a second salt concentration,
[0357] whereby the in vivo half-life of the variant antibody
relative to its parent antibody is increased if i) the retention
time of the variant antibody determined in step a) is bigger/longer
than the retention time of its parent antibody determined in step
a), and ii) the retention time of the variant antibody determined
in step a) and the retention time of the variant antibody
determined in step b) are substantially the same,
[0358] whereby the in vivo half-life of the variant antibody
relative to its parent antibody is decreased if i) the retention
time of the variant antibody determined in step a) is
smaller/shorter than the retention time of its parent antibody
determined in step a), and ii) the retention time of the variant
antibody determined in step a) and the retention time of the
variant antibody determined in step b) are substantially the
same.
[0359] It has been found that antibodies that showed a late elution
from the FcRn column, i.e. that had a longer retention time on the
FcRn column and that showed no antibody-Fab-FcRn interaction had a
longer half-life in vivo (see Example 6).
TABLE-US-00032 TABLE 8 In vivo data. retention time in vivo
half-life antibody [min] [h] anti-Abeta antibody 45.5 (Example 5)
103 +/- 51 (wild-type) anti-IGF-1R antibody 45.5 (Example 5) 97+/-
9 (wild-type) anti-IGF-1R antibody 58 (Example 5) 211 +/- 41
(YTE-mutant) Briakinumab 93.7 (Example 2) 48 Briakinumab with HC
90.1 (Example 2) 78 mutations R16A, R19A, K57A, K64A, R83A
Briakinumab with LC 86.2 (Example 2) 109 mutations R27A, R55A, R94A
Ustekinumab 84.3 (Example 2) 137 The term YTE-mutant denotes the
triple mutant M252Y/S254T/T256E.
[0360] One aspect as reported herein is the use of a method as
reported herein for determining the in vivo half-life of an
antibody.
[0361] The set of in vitro and in vivo experiments conducted with
wild-type IgG and IgG variants with YTE-mutations in the Fc-region
allowed to show a semi-quantitative correlation of the findings in
the FcRn affinity chromatography with those of the in vivo
pharmacokinetic studies with mice transgenic for human FcRn
(Spiekerman, G. M., et al. J. Exp. Med. 196 (2002) 303-310;
Dall'Acqua, W. F., et al., J. Biol. Chem. 281 (2006) 23514-23524).
The YTE-mutation leads to a significantly prolonged half-life and
slower plasma clearance. The longer in vivo half-life corresponded
to a longer retention time in the FcRn chromatography. An extended
half-life of an Fc-engineered trastuzumab variant recently was
shown to have enhanced in vitro binding to FcRn as measured by flow
cytometry (Petkova, S. B., et al., Int. Immunol. 18 (2006)
1759-1769). A variant of the anti-VEGF IgG1 antibody Bevacizumab
with 11-fold improved FcRn affinity was shown to have a five-fold
extended half-life in human FcRn transgenic mice and a three-fold
longer half-life in cynomolgus monkeys (Zalevsky, J., et al., Nat.
Biotechnol. 28 (2010) 157-159).
[0362] It has been shown that the antibody format had no impact on
the binding to FcRn column. This was shown for the knob-into-hole
format and for several bispecific antibody formats. Thus, the
method as reported herein can be used for the evaluation of new
antibody formats.
[0363] In one embodiment the complex is mono-biotinylated.
[0364] In one embodiment the chromatography material comprising a
non-covalent complex of neonatal Fc receptor (FcRn) and
beta-2-microglobulin as ligand has a stability of at least 100
cycles in the methods and uses as reported herein. A cycle is a pH
gradient from the first pH value to the second pH value of the
respective method or use whereby for regeneration of the material
no further change of conditions is required than the final
conditions of the method or use. Thus, in one embodiment a cycle is
a pH gradient from about pH value pH 5.5 to about pH value pH
8.8.
[0365] g.ii) Elution with Linear Positive pH Gradient at the Same
Salt Concentration of the Antibody and its Fc-Region
[0366] Herein is reported a method comprising the following two
steps: [0367] a) determining the retention time of the antibody on
an FcRn affinity chromatography column with a positive linear pH
gradient elution in the presence of a first salt concentration,
[0368] b) determining the retention time of the Fc-region of the
antibody on an FcRn affinity chromatography column with a positive
linear pH gradient elution in the presence of the first salt
concentration.
[0369] With this method it is possible to determine the presence of
antibody-Fab-FcRn interaction in an antibody-Fc-FcRn complex in a
simple chromatography method by comparing the retention times of
the antibody and its Fc-region. The Fc-region e.g. can be obtained
by enzymatic cleavage with the enzyme IdeS or papain, or can be
produced recombinantly. This is important as antibody-Fab-FcRn
interactions influence the in vivo half-life of the antibody.
[0370] For antibody/antibody-Fc-region pairs different relations
with respect to their retention times on an FcRn affinity
chromatography column and likewise with respect to their FcRn
interaction exist: [0371] 1) the antibody and its Fc-region have
substantially the same retention time: in this case the in vivo
half-life of the antibody is not influenced by an antibody-Fab-FcRn
interaction, [0372] 2) the antibody and its Fc-region have
different retention times and the retention time of the Fc-region
is shorter than the retention time of the antibody: in this case
the in vivo half-life of the antibody is influenced by an
antibody-Fab-FcRn interaction.
[0373] In case the antibody in question is a variant antibody
further aspects have to be considered: in the variant antibody the
antibody-Fc-FcRn interaction as well as the antibody-Fab-FcRn
interaction can be changed due to the introduced modifications with
respect to the parent antibody.
[0374] Thus, the following possible relations between a parent
antibody, a variant antibody and their respective Fc-regions exist
(see FIG. 10): [0375] 1) the parent antibody (1), the variant
antibody (3) and the respective Fc-regions (2,4) have substantially
the same retention time: in this case the in vivo half-life of the
variant antibody i) is not influenced by an antibody-Fab-FcRn
interaction and ii) corresponds to the in-vivo half-life of the
parent antibody (see FIG. 10 A), [0376] 2) the variant antibody (3)
and its Fc-region (4) have different retention times, the retention
time of the variant antibody's Fc-region is shorter than the
retention time of the variant antibody, and the parent antibody
(1), the parent antibody's Fc-region (2) and the variant antibody's
Fc-region (4) have substantially the same retention time: in this
case the in vivo half-life of the variant antibody is i) influenced
by an antibody-Fab-FcRn interaction and ii) is shorter than the
in-vivo half-life of the parent antibody (see FIG. 10B), [0377] 3)
the parent antibody (1) and the variant antibody (3) have different
retention times, the retention time of the variant antibody's
Fc-region (4) is substantially the same as the retention time of
the variant antibody (3), and the retention time of the variant
antibody is longer than the retention time of the parent antibody
(1): in this case the in vivo half-life of the variant antibody is
i) not influenced by an antibody-Fab-FcRn interaction and ii) is
longer than the in-vivo half-life of the parent antibody (see FIG.
10C), [0378] 4) the parent antibody (1) and the variant antibody
(3) have different retention times, the retention time of the
variant antibody's Fc-region (4) is substantially the same as the
retention time of the variant antibody (3), and the retention time
of the variant antibody (3) is shorter than the retention time of
the parent antibody (1): in this case the in vivo half-life of the
variant antibody is i) not influenced by an antibody-Fab-FcRn
interaction and ii) is shorter than the in-vivo half-life of the
parent antibody, [0379] 5) the parent antibody (1) and the variant
antibody (3) have different retention times, the retention time of
the variant antibody's Fc-region (4) is different from the
retention time of the variant antibody (3) and also different from
the retention time of the parent antibody (1) and its Fc-region
(2), and the retention time of the variant antibody's Fc-region (4)
is between the retention time of the variant antibody (3) and the
parent antibody (4): in this case the in vivo half-life of the
variant antibody is i) influenced by an antibody-Fab-FcRn
interaction and ii) is different from the in-vivo half-life of the
parent antibody (see FIG. 10D).
[0380] In one case the reference antibody is an antibody that has
substantially the same retention time as its Fc-region after IdeS
cleavage or papain cleavage.
[0381] As outlined above the antibody-Fab-FcRn interaction can have
an influence on the in vivo half-life of the antibody. Also as
outlined above the antibody-Fc-FcRn interaction can have an
influence on the in vivo half-life of the antibody. Thus, both
interactions have to be accounted for.
[0382] For example, Ropeenian and Akilesh (Nat. Rev. Immunol. 7
(2007) 715-725) report that, for example, the humanized IgG1
antibody hu4D5 (Herceptin; Genentech; an ERBB2-specific monoclonal
antibody) variant Asn434Ala (N434A) and the triply substituted
variant Thr307Ala/Asn434Ala/Glu380Ala (T307A/N434A/Q380A) bind
human FcRn with 3-fold and 12-fold higher affinity, respectively,
than the wild-type hu4D5 antibody at pH 6.0. Unexpectedly, in FcRn
transgenic humanized mice, the half-lives of these two variant
antibodies were essentially equivalent. This discrepancy may be
explained according to Ropeenian and Akilesh by the increased
affinity of the triply substituted variant for FcRn at pH 7.4.
Fc-region mutations that improve the binding affinity at pH 7.4, as
well as at pH 6.0, may actually accelerate the clearance of the
antibody in vivo rather than prolong its half-life.
[0383] Thus, it has further to be considered if the retention time
of the Fc-region of the variant antibody is longer than a critical
retention time. Without being bound by this theory this results in
the effect that the interaction at pH 7.4 is increased so much that
the dissociation of the antibody-FcRn complex at pH 7.4 is reduced
leading to increased degradation of the antibody (see FIG. 11).
[0384] One aspect of the current invention is a method for
selecting an antibody comprising the following steps (see FIG. 12):
[0385] a) determining the retention time of i) the antibody (3),
ii) the antibody's Fc-region (4), iii) a reference antibody (1),
iv) the reference antibody's Fc-region (2), and v) the reference
antibody with the mutation N434A in the Fc-region (5) on an FcRn
affinity chromatography column using the same elution conditions,
[0386] b) selecting an antibody for which [0387] b-i) the reference
antibody (1), the variant antibody (3) and the respective
Fc-regions (2,4) have substantially the same retention time, and
the retention time of the antibody is shorter than the retention
time of the reference antibody with the mutation N434A in the
Fc-region (5) and thereby selecting an antibody whose in vivo
half-life i) is not influenced by an antibody-Fab-FcRn interaction
and ii) corresponds to the in-vivo half-life of the parent antibody
(see FIG. 12A), [0388] b-ii) the antibody (3) and its Fc-region (4)
have different retention times, the retention time of the
antibody's Fc-region (4) is shorter than the retention time of the
antibody (3) and the same or longer than the retention time of the
reference antibody (1) or its Fc-region (2), the retention time of
the reference antibody (1), the reference antibody's Fc-region (2),
and the antibody (3) is shorter than the retention time of the
reference antibody with the mutation N434A in the Fc-region (5) and
thereby selecting an antibody whose in vivo half-life is i)
influenced by an antibody-Fab-FcRn interaction and ii) shorter than
the in-vivo half-life of the reference antibody (see FIG. 12B),
[0389] b-iii) the reference antibody (1) and the antibody (3) have
different retention times, the retention time of the antibody's
Fc-region (4) is substantially the same as the retention time of
the antibody (3), the retention time of the antibody (3) is longer
than the retention time of the reference antibody (1), and the
retention time of the antibody (3) is shorter than the retention
time of the reference antibody with the mutation N434A in the
Fc-region (5) and thereby selecting an antibody whose in vivo
half-life is i) not influenced by an antibody-Fab-FcRn interaction
and ii) longer than the in-vivo half-life of the reference antibody
(see FIG. 12C), [0390] b-iv) the reference antibody (1) and the
antibody (3) have different retention times, the retention time of
the antibody's Fc-region (4) is substantially the same as the
retention time of the antibody (3), the retention time of the
antibody (3) is shorter than the retention time of the reference
antibody (1), and the retention time of the antibody (3) is shorter
than the retention time of the reference antibody with the mutation
N434A in the Fc-region (5) and thereby selecting an antibody whose
in vivo half-life is i) not influenced by an antibody-Fab-FcRn
interaction and ii) shorter than the in-vivo half-life of the
reference antibody (see FIG. 12D), [0391] b-v) the reference
antibody (1) and the antibody (3) have different retention times,
the retention time of the antibody's Fc-region (4) is different
from the retention time of the antibody (3) and also different from
the retention time of the reference antibody (1) and its Fc-region
(2), the retention time of the antibody's Fc-region (3) is between
the retention time of the antibody (3) and the reference antibody
(1), and the retention time of the antibody (3) is shorter than the
retention time of the reference antibody with the mutation N434A in
the Fc-region (5) and thereby selecting an antibody whose in vivo
half-life is i) influenced by an antibody-Fab-FcRn interaction and
ii) different from the in-vivo half-life of the reference antibody
(see FIG. 12E).
[0392] In one embodiment the elution is by a positive linear pH
gradient at a constant salt concentration or by using a linear salt
gradient at a constant pH value.
[0393] In one embodiment the antibody is a variant antibody of a
parent antibody and the reference antibody is the parent antibody.
In one embodiment the variant antibody has amino acid alterations
in the antibody-Fab or/and in the antibody-Fc-region.
[0394] g.iii) Elution with a Salt Gradient
[0395] Herein is reported a method comprising the following steps:
[0396] a) determining the retention time of an antibody and of a
reference antibody on an FcRn affinity chromatography column at a
first pH value with a salt gradient elution, [0397] b) determining
the retention time of an antibody and a reference antibody on an
FcRn affinity chromatography column at a second pH value with a
salt gradient elution.
[0398] It has been found that beside an elution with a pH gradient
at a constant salt concentration also the elution with a salt
gradient at a constant pH value can be used to determine whether
antibody-Fab-FcRn interactions in an antibody-Fc-FcRn complex are
present or not.
[0399] As already outlined above the antibody-Fab-FcRn interaction
is a secondary interaction that is established, if present at all,
after an antibody-Fc-FcRn complex has been formed.
[0400] Both interactions, i.e. the antibody-Fc-FcRn and the
antibody-Fab-FcRn interaction, are charge mediated non-covalent
interactions.
[0401] One aspect as reported herein is a method for determining
the presence of antibody-Fab-FcRn interaction influencing the in
vivo half-life of the antibody comprising the following steps:
[0402] a) determining the retention time of the antibody and of a
reference antibody on an FcRn affinity chromatography column at a
first pH value with a salt gradient elution, [0403] b) determining
the retention time of the antibody and a reference antibody on an
FcRn affinity chromatography column at a second pH value with a
salt gradient elution,
[0404] whereby the presence of antibody-Fab-FcRn interaction
influencing the in vivo half-life of the antibody is determined if
the ratio of the retention times of the antibody and the reference
antibody determined in step a) is substantially different from the
ratio of the retention times of the antibody and the reference
antibody determined in step b).
[0405] In one embodiment the first pH value is 5.5. In one
embodiment the second pH value is 8.8.
[0406] In one embodiment the salt gradient in step a) and step b)
are identical.
[0407] In one embodiment the salt gradient is a sodium chloride
gradient.
[0408] In one embodiment the salt gradient is from 0 mM to 250 mM
salt.
[0409] h) Bevacizumab and Bevacizumab-Mutant
[0410] Another molecule without charge patch in the CDRs is chosen
to create a positive charge patch in the LC-CDRs to verify the
findings reported above that positive charge at this position
influences FcRn binding affinity of antibodies in general.
[0411] Bevacizumab was chosen because it had only little charge in
the LC-CDRs. The three basic amino acid residues that were
identified using Briakinumab are the arginine residues R27, R55 and
R94. In the Bevacizumab amino acid sequence aspartic acid D27,
leucine L54 and threonine T93 are exchanged into lysine residues to
create a positive charge patch (see FIG. 14).
[0412] The FcRn affinity chromatogram of Bevacizumab-wild-type and
the Bevacizumab-mutant are shown in FIG. 9 and the respective
retention times are listed in the following Table 9.
TABLE-US-00033 TABLE 9 FcRn column retention times of
Bevacizumab-wild-type and the Bevacizumab-mutant. sample Retention
time [min] Ustekinumab 83.6 Briakinumab 91.6 Bevacizumab-wild-type
84.7 Bevacizumab-mutant 86.9
[0413] Bevacizumab-wild-type has a retention time of 84.7 minutes,
whereas Bevacizumab-mutant elutes after 86.9 minutes. Thus, the
positive charge patch in the Fv of Bevacizumab causes a retention
time shift of 2.2 minutes. The results indicate that charge in the
Fv of an IgG1 influences FcRn binding affinity in general,
especially the dissociation from the FcRn is influenced.
Specific Embodiments
[0414] 1. A method for selecting an antibody comprising the
following steps: [0415] i) determining a first retention time of
the antibody and a reference antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a first salt concentration, and determining a
second retention time of the antibody and the reference antibody on
an FcRn affinity chromatography column with the positive linear pH
gradient elution in the presence of a second salt concentration, or
[0416] ii) determining a first retention time of the antibody and a
reference antibody on an FcRn affinity chromatography column with a
linear salt gradient elution at a first pH value, and determining a
second retention time of the antibody and the reference antibody on
an FcRn affinity chromatography column with the linear salt
gradient elution at a second pH value, or [0417] iii) determining
for the antibody and a reference antibody the K.sub.D value at pH 6
using surface plasmon resonance, and determining the retention time
of the antibody and the reference antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration, or [0418] iv)
determining for the antibody and a reference antibody the K.sub.D
value at pH 6 using surface plasmon resonance, and determining the
retention time of the antibody and the reference antibody on an
FcRn affinity chromatography column with a linear salt gradient
elution, or [0419] v) determining the retention time of the
antibody and its Fc-region on an FcRn affinity chromatography
column with a positive linear pH gradient elution, or [0420] vi)
determining the retention time of the antibody and its Fc-region on
an FcRn affinity chromatography column with a linear salt gradient
elution at a high pH value, or [0421] vii) determining for the
antibody and its Fc-region the K.sub.D value at pH 6 using surface
plasmon resonance, and determining the retention time of the
antibody and its Fc-region on an FcRn affinity chromatography
column with a positive linear pH gradient elution in the presence
of a high salt concentration, or [0422] viii) determining for the
antibody and its Fc-region the K.sub.D value at pH 6 using surface
plasmon resonance, and determining the retention time of the
antibody and its Fc-region on an FcRn affinity chromatography
column with a linear salt gradient elution at a high pH value,
[0423] and by selecting [0424] a) an antibody that has a first
retention time that is substantially the same as the second
retention time, or [0425] b) an antibody that has a K.sub.D value
that differs from the K.sub.D value of the reference antibody by at
most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0426] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0427] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region. [0428] 2. A method for selecting
an antibody comprising the following steps: [0429] determining a
first retention time of the antibody and a reference antibody on an
FcRn affinity chromatography column with a positive linear pH
gradient elution in the presence of a first salt concentration, and
determining a second retention time of the antibody and the
reference antibody on an FcRn affinity chromatography column with
the positive linear pH gradient elution in the presence of a second
salt concentration, and [0430] selecting [0431] a) an antibody that
has a first retention time that is substantially the same as the
second retention time, or [0432] b) an antibody that has a K.sub.D
value that differs from the K.sub.D value of the reference antibody
by at most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0433] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0434] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region. [0435] 3. A method for selecting
an antibody comprising the following steps: [0436] determining a
first retention time of the antibody and a reference antibody on an
FcRn affinity chromatography column with a linear salt gradient
elution at a first pH value, and determining a second retention
time of the antibody and the reference antibody on an FcRn affinity
chromatography column with the linear salt gradient elution at a
second pH value, and [0437] selecting [0438] a) an antibody that
has a first retention time that is substantially the same as the
second retention time, or [0439] b) an antibody that has a K.sub.D
value that differs from the K.sub.D value of the reference antibody
by at most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0440] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0441] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region. [0442] 4. A method for selecting
an antibody comprising the following steps: [0443] determining for
the antibody and a reference antibody the K.sub.D value at pH 6
using surface plasmon resonance, and determining the retention time
of the antibody and the reference antibody on an FcRn affinity
chromatography column with a positive linear pH gradient elution in
the presence of a high salt concentration, and [0444] selecting
[0445] a) an antibody that has a first retention time that is
substantially the same as the second retention time, or [0446] b)
an antibody that has a K.sub.D value that differs from the K.sub.D
value of the reference antibody by at most a factor of 10 and that
has a retention time that is substantially the same as the
retention time of the reference antibody, or [0447] c) an antibody
that has a retention time that is substantially the same as the
retention time of its Fc-region, or [0448] d) an antibody that has
a K.sub.D value that differs from the K.sub.D value of its
Fc-region by at most a factor of 10 and that has a retention time
that is substantially the same as the retention time of its
Fc-region. [0449] 5. A method for selecting an antibody comprising
the following steps: [0450] determining for the antibody and a
reference antibody the K.sub.D value at pH 6 using surface plasmon
resonance, and determining the retention time of the antibody and
the reference antibody on an FcRn affinity chromatography column
with a linear salt gradient elution, and [0451] selecting [0452] a)
an antibody that has a first retention time that is substantially
the same as the second retention time, or [0453] b) an antibody
that has a K.sub.D value that differs from the K.sub.D value of the
reference antibody by at most a factor of 10 and that has a
retention time that is substantially the same as the retention time
of the reference antibody, or [0454] c) an antibody that has a
retention time that is substantially the same as the retention time
of its Fc-region, or [0455] d) an antibody that has a K.sub.D value
that differs from the K.sub.D value of its Fc-region by at most a
factor of 10 and that has a retention time that is substantially
the same as the retention time of its Fc-region. [0456] 6. A method
for selecting an antibody comprising the following steps: [0457]
determining the retention time of the antibody and its Fc-region on
an FcRn affinity chromatography column with a positive linear pH
gradient elution, and [0458] selecting [0459] a) an antibody that
has a first retention time that is substantially the same as the
second retention time, or [0460] b) an antibody that has a K.sub.D
value that differs from the K.sub.D value of the reference antibody
by at most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0461] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0462] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region. [0463] 7. A method for selecting
an antibody comprising the following steps: [0464] determining the
retention time of the antibody and its Fc-region on an FcRn
affinity chromatography column with a linear salt gradient elution
at a high pH value, and [0465] selecting [0466] a) an antibody that
has a first retention time that is substantially the same as the
second retention time, or [0467] b) an antibody that has a K.sub.D
value that differs from the K.sub.D value of the reference antibody
by at most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0468] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0469] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its
[0470] Fc-region by at most a factor of 10 and that has a retention
time that is substantially the same as the retention time of its
Fc-region. [0471] 8. A method for selecting an antibody comprising
the following steps: [0472] determining for the antibody and its
Fc-region the K.sub.D value at pH 6 using surface plasmon
resonance, and determining the retention time of the antibody and
its Fc-region on an FcRn affinity chromatography column with a
positive linear pH gradient elution in the presence of a high salt
concentration, and [0473] selecting [0474] a) an antibody that has
a first retention time that is substantially the same as the second
retention time, or [0475] b) an antibody that has a K.sub.D value
that differs from the K.sub.D value of the reference antibody by at
most a factor of 10 and that has a retention time that is
substantially the same as the retention time of the reference
antibody, or [0476] c) an antibody that has a retention time that
is substantially the same as the retention time of its Fc-region,
or [0477] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region. [0478] 9. A method for selecting
an antibody comprising the following steps: [0479] determining for
the antibody and its Fc-region the K.sub.D value at pH 6 using
surface plasmon resonance, and determining the retention time of
the antibody and its Fc-region on an FcRn affinity chromatography
column with a linear salt gradient elution at a high pH value, and
[0480] selecting [0481] a) an antibody that has a first retention
time that is substantially the same as the second retention time,
or [0482] b) an antibody that has a K.sub.D value that differs from
the K.sub.D value of the reference antibody by at most a factor of
10 and that has a retention time that is substantially the same as
the retention time of the reference antibody, or [0483] c) an
antibody that has a retention time that is substantially the same
as the retention time of its Fc-region, or [0484] d) an antibody
that has a K.sub.D value that differs from the K.sub.D value of its
Fc-region by at most a factor of 10 and that has a retention time
that is substantially the same as the retention time of its
Fc-region. [0485] 10. The method according to any one of
embodiments 1 to 10, wherein the method is for selecting an
antibody that is free of antibody-Fab-FcRn interaction influencing
the in vivo half-life of the antibody. [0486] 11. The method
according to any one of embodiments 1, 6, 7, 8 and 9 wherein [0487]
the method is for selecting an antibody that has a relative in vivo
half-life that is increased compared to an antibody of the IgG1,
IgG3 or IgG4 subclass, and [0488] further the retention time of a
reference antibody or reference Fc-region is determined, and [0489]
by selecting [0490] a) an antibody that has a first retention time
that is longer than the first retention time of the reference
antibody, and a first retention time that is substantially the same
as the second retention time, or [0491] b) an antibody that has a
K.sub.D value that differs from the K.sub.D value of the reference
antibody by at most a factor of 10 and that has a retention time
that is longer than the retention time of the reference antibody,
or [0492] c) an antibody that has a retention time that is
substantially the same as the retention time of its Fc-region and
that is longer than the retention time of the reference antibody,
or [0493] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of its Fc-region by at most a factor of 10 and
that has a retention time that is substantially the same as the
retention time of its Fc-region and that is longer than the
retention time of the reference antibody. [0494] 12. The method
according to any one of embodiments 1, 6, 7, 8 and 9 wherein [0495]
the method is for determining the relative increase or decrease in
the in vivo half-life of an antibody to a reference antibody, and
[0496] further the retention time of a reference antibody or
reference Fc-region is determined, and [0497] further the retention
time of an IgG Fc-region with the mutation N434A is determined, and
[0498] by selecting [0499] a) an antibody that has a first
retention time that is longer than the first retention time of the
reference, that has a first retention time and a second retention
time that are substantially the same, and that has a first
retention time that is shorter than the retention time of the
Fc-region with the mutation N434A and thereby selecting an antibody
with relative increased in vivo half-life, or [0500] b) an antibody
that has a K.sub.D value that differs from the K.sub.D value of the
reference antibody by at most a factor of 10, that has a retention
time that is longer than the retention time of the reference
antibody and that has a first retention time that is shorter than
the retention time of the Fc-region with the mutation N434A and
thereby selecting an antibody with relative increased in vivo
half-life, or [0501] c) an antibody that has a first retention time
that is shorter than the first retention time of the reference
antibody, and that has a first the retention time and a second
retention time that are substantially the same, and thereby
selecting an antibody with relative decreased in vivo half-life, or
[0502] d) an antibody that has a K.sub.D value that differs from
the K.sub.D value of the reference antibody by at most a factor of
10, and that has a retention time that is shorter than the
retention time of the reference antibody, and thereby selecting an
antibody with relative increased in vivo half-life. [0503] 13. The
method according to any one of embodiments 1, 2, 4, 6, 8, and 10 to
12, wherein the (positive) linear pH gradient is from about pH 5.5
to about pH 8.8. [0504] 14. The method according to any one of
embodiments 1 to 13, wherein the salt is selected from sodium
chloride, sodium sulphate, potassium chloride, potassium sulfate,
sodium citrate, or potassium citrate. [0505] 15. The method
according to any one of embodiments 1 to 14, wherein the salt is
sodium chloride. [0506] 16. The method according to any one of
embodiments 1, 2 and 10 to 15, wherein the first salt concentration
is between 50 mM and 200 mM. [0507] 17. The method according to any
one of embodiments 1, 2 and 10 to 16, wherein the first salt
concentration is about 140 mM. [0508] 18. The method according to
any one of embodiments 1, 2 and 10 to 17, wherein the second salt
concentration is between 300 mM and 600 mM. [0509] 19. The method
according to any one of embodiments 1, 2 and 10 to 18, wherein the
second salt concentration is about 400 mM. [0510] 20. The method
according to any one of embodiments 1, 3, 5, 7 and 9 to 19, wherein
the linear salt gradient is from 0 mM salt to 500 mM salt. [0511]
21. The method according to any one of embodiments 1, 3, 5, 7 and 9
to 20, wherein the linear salt gradient is from 0 mM salt to 250 mM
salt. [0512] 22. The method according to any one of embodiments 1,
3 and 10 to 21, wherein the first pH value is about 5.5. [0513] 23.
The method according to any one of embodiments 1, 3 and 10 to 22,
wherein the second pH value is about 7.4. [0514] 24. The method
according to any one of embodiments 1, 4, 8 and 10 to 23, wherein
the high salt concentration is between 250 mM and 600 mM. [0515]
25. The method according to any one of embodiments 1, 4, 8 and 10
to 24, wherein the high salt concentration is about 400 mM. [0516]
26. The method according to any one of embodiments 1, 7 and 9 to
25, wherein the high pH value is between pH 6.5 and pH 8.8. [0517]
27. The method according to any one of embodiments 1, 7 and 9 to
26, wherein the high pH value is about pH 7.4. [0518] 28. The
method according to any one of embodiments 1 to 27, wherein
substantially different retention times differ by at least 5%.
[0519] 29. The method according to any one of embodiments 1 to 28,
wherein substantially different retention times differ by at least
10%. [0520] 30. The method according to any one of embodiments 1 to
29, wherein substantially different retention time differ by at
least 15%. [0521] 31. The method according to any one of
embodiments 1 to 30, wherein substantially same retention times
differ by less than 5%. [0522] 32. The method according to any one
of embodiments 1 to 31, wherein substantially same retention times
differ by 3.5% or less. [0523] 33. The method according to any one
of embodiments 1 to 32, wherein substantially same retention times
differ by 2.5% or less. [0524] 34. The method according to any one
of embodiments 1 to 33, wherein if the retention times are
substantially different the retention times are proportional to one
above the square root of the salt concentration
(.about.1/SQRT(c(salt))). [0525] 35. The method according to any
one of embodiments 1 to 34, wherein the reference antibody is
either the anti-IL-1R antibody with SEQ ID NO: 01 (heavy chain) and
SEQ ID NO: 02 (light chain) for the subclass IgG1 and the
anti-IL-1R antibody with SEQ ID NO: 03 (heavy chain) and SEQ ID NO:
04 (light chain) for the subclass IgG4, or the anti-HER2 antibody
with SEQ ID NO: 36 (heavy chain) and SEQ ID NO: 37 (light chain)
for the subclass IgG1 and the anti-HER2 antibody with SEQ ID NO: 38
(heavy chain) and SEQ ID NO: 39 (light chain) for the subclass
IgG4. [0526] 36. The method according to any one of embodiments 1
to 35, wherein the FcRn affinity chromatography column comprises a
non-covalent complex of a neonatal Fc receptor (FcRn) and
beta-2-microglobulin (b2m). [0527] 37. The method according to any
one of embodiments 1 to 36, wherein the FcRn affinity
chromatography column comprises a covalent complex of a neonatal Fc
receptor (FcRn) and beta-2-microglobulin (b2m). [0528] 38. The
method according to any one of embodiments 36 to 37, wherein the
complex of the neonatal Fc receptor (FcRn) and beta-2-microglobulin
(b2m) is bound to a solid phase. [0529] 39. The method according to
embodiment 38, wherein the solid phase is a chromatography
material. [0530] 40. The method according to any one of embodiments
36 to 39, wherein the complex of a neonatal Fc receptor (FcRn) and
beta-2-microglobulin (b2m) is biotinylated and the solid phase is
derivatized with streptavidin. [0531] 41. The method according to
any one of embodiments 36 to 40, wherein the beta-2-microglobulin
is from the same species as the neonatal Fc receptor (FcRn). [0532]
42. The method according to any one of embodiments 36 to 40,
wherein the beta-2-microglobulin is from a different species as the
FcRn. [0533] 43. The method according to any one of embodiments 1
to 42, wherein the FcRn selected from human FcRn, cynomolgus FcRn,
mouse FcRn, rat FcRn, sheep FcRn, dog FcRn, pig FcRn, minipig FcRn
and rabbit FcRn. [0534] 44. The method according to any one of
embodiments 1 to 43, wherein the antibody is a monospecific
antibody or antibody fragment of fusion polypeptide, or a
bispecific antibody or antibody fragment of fusion polypeptide, or
a trispecific antibody or antibody fragment of fusion polypeptide,
or a tetraspecific antibody or antibody fragment of fusion
polypeptide. [0535] 45. The method according to any one of
embodiments 1 to 44, wherein the antibody is a full length
antibody. [0536] 46. The antibody according to any one of
embodiments 1 to 45, wherein the antibody is a monoclonal antibody.
[0537] 47. A method for producing an antibody comprising the
following steps: [0538] a) providing a cell comprising one or more
nucleic acids encoding an antibody selected with a method according
to any one of embodiments 1 to 46, [0539] b) cultivating the cell
in a cultivation medium, and [0540] c) recovering the antibody from
the cell or the cultivation medium and thereby producing the
antibody.
REFERENCE LIST
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[0593] The following examples, figures and sequences are provided
to aid the understanding of the present invention, the true scope
of which is set forth in the appended claims. It is understood that
modifications can be made in the procedures set forth without
departing from the spirit of the invention.
Materials and Methods
Antibodies
[0594] The antibodies used in the experiments were Ustekinumab
(CNTO 1275, Stelara.TM.), CAS Registry Number 815610-63-0, variable
domains in SEQ ID NO: 42 and 43), Briakinumab (ABT 874, J 695,
Ozespa.TM., variable domains in SEQ ID NO: 40 and 41) as well as
ten variants and mutants of Ustekinumab and Briakinumab, hereafter
referred to as mAb 1 to mAb 10, respectively. In total 12 IgGs were
investigated (see Table 2).
[0595] Synthetic genes were produced for Ustekinumab, Briakinumab,
mAb 5 and mAb 6 at Geneart (Life technologies GmbH, Carlsbad,
Calif., USA). Site-directed mutagenesis was used to exchange
specific amino acids to produce mAb 1, mAb 2, mAb 7, mAb 8 and mAb
9. MAb 3 was transfected with plasmids encoding Ustekinumab heavy
chains and Briakinumab light chains and mAb 4 vice versa.
[0596] The monoclonal antibodies used herein were transiently
expressed in HEK293 cells (see below) and purification was
performed by protein A chromatography using standard procedures
(see below).
[0597] The biochemical characterization included size exclusion
chromatography (Waters BioSuite.TM. 250 7.8.times.300 mm, eluent:
200 mM KH.sub.2PO.sub.4, 250 mM KCl, pH 7.0) and analysis of the
molecular weight distribution using the BioAnalyzer 2100 (Agilent
technologies, Santa Clara, Calif., USA).
[0598] Fc fragments were obtained by IdeS digestion of antibodies
within 30 minutes at 37.degree. C. using the FabRICATOR-Kit
(GENOVIS, Lund, Sweden).
[0599] Expression Plasmids
[0600] For the expression of the above described antibodies,
variants of expression plasmids for transient expression (e.g. in
HEK293-F) cells based either on a cDNA organization with or without
a CMV-Intron A promoter or on a genomic organization with a CMV
promoter were applied.
[0601] Beside the antibody expression cassette the plasmids
contained: [0602] an origin of replication which allows replication
of this plasmid in E. coli, [0603] a B-lactamase gene which confers
ampicillin resistance in E. coli., and [0604] the dihydrofolate
reductase gene from Mus musculus as a selectable marker in
eukaryotic cells.
[0605] The transcription unit of the antibody gene was composed of
the following elements: [0606] unique restriction site(s) at the 5'
end [0607] the immediate early enhancer and promoter from the human
cytomegalovirus, [0608] followed by the Intron A sequence in the
case of the cDNA organization, [0609] a 5'-untranslated region of a
human antibody gene, [0610] an immunoglobulin heavy chain signal
sequence, [0611] the human antibody chain either as cDNA or as
genomic organization with the immunoglobulin exon-intron
organization [0612] a 3' non-translated region with a
polyadenylation signal sequence, and [0613] unique restriction
site(s) at the 3' end.
[0614] The fusion genes comprising the antibody chains were
generated by PCR and/or gene synthesis and assembled by known
recombinant methods and techniques by connection of the according
nucleic acid segments e.g. using unique restriction sites in the
respective plasmids. The subcloned nucleic acid sequences were
verified by DNA sequencing. For transient transfections larger
quantities of the plasmids were prepared by plasmid preparation
from transformed E. coli cultures (Nucleobond AX,
Macherey-Nagel).
[0615] Cell Culture Techniques
[0616] Standard cell culture techniques were used as described in
Current Protocols in Cell Biology (2000), Bonifacino, J. S., Dasso,
M., Harford, J. B., Lippincott-Schwartz, J. and Yamada, K. M.
(eds.), John Wiley & Sons, Inc.
[0617] Transient Transfections in HEK293-F System
[0618] The antibodies were generated by transient transfection with
the respective plasmids (e.g. encoding the heavy chain, as well as
the corresponding light chain) using the HEK293-F system
(Invitrogen) according to the manufacturer's instruction. Briefly,
HEK293-F cells (Invitrogen) growing in suspension either in a shake
flask or in a stirred fermenter in serum-free FreeStyle.TM. 293
expression medium (Invitrogen) were transfected with a mix of the
respective expression plasmids and 293fectin.TM. or fectin
(Invitrogen). For 2 L shake flask (Corning) HEK293-F cells were
seeded at a density of 1*10.sup.6 cells/mL in 600 mL and incubated
at 120 rpm, 8% CO.sub.2. The day after the cells were transfected
at a cell density of ca. 1.5*10.sup.6 cells/mL with ca. 42 mL mix
of A) 20 mL Opti-MEM (Invitrogen) with 600 .mu.g total plasmid DNA
(1 .mu.g/mL) encoding the heavy chain, respectively and the
corresponding light chain in an equimolar ratio and B) 20 ml
Opti-MEM+1.2 mL 293 fectin or fectin (2 .mu.L/mL). According to the
glucose consumption glucose solution was added during the course of
the fermentation. The supernatant containing the secreted antibody
was harvested after 5-10 days and antibodies were either directly
purified from the supernatant or the supernatant was frozen and
stored.
[0619] Purification
[0620] The antibodies were purified from cell culture supernatants
by affinity chromatography using MabSelectSure-Sepharose.TM. (GE
Healthcare, Sweden), hydrophobic interaction chromatography using
butyl-Sepharose (GE Healthcare, Sweden) and Superdex 200 size
exclusion (GE Healthcare, Sweden) chromatography.
[0621] Briefly, sterile filtered cell culture supernatants were
captured on a MabSelectSuRe resin equilibrated with PBS buffer (10
mM Na.sub.2HPO.sub.4, 1 mM KH.sub.2PO.sub.4, 137 mM NaCl and 2.7 mM
KCl, pH 7.4), washed with equilibration buffer and eluted with 25
mM sodium citrate at pH 3.0. The eluted antibody fractions were
pooled and neutralized with 2 M Tris, pH 9.0. The antibody pools
were prepared for hydrophobic interaction chromatography by adding
1.6 M ammonium sulfate solution to a final concentration of 0.8 M
ammonium sulfate and the pH adjusted to pH 5.0 using acetic acid.
After equilibration of the butyl-Sepharose resin with 35 mM sodium
acetate, 0.8 M ammonium sulfate, pH 5.0, the antibodies were
applied to the resin, washed with equilibration buffer and eluted
with a linear gradient to 35 mM sodium acetate pH 5.0. The antibody
containing fractions were pooled and further purified by size
exclusion chromatography using a Superdex 200 26/60 GL (GE
Healthcare, Sweden) column equilibrated with 20 mM histidine, 140
mM NaCl, pH 6.0. The antibody containing fractions were pooled,
concentrated to the required concentration using Vivaspin
ultrafiltration devices (Sartorius Stedim Biotech S.A., France) and
stored at -80.degree. C.
TABLE-US-00034 TABLE 10 Yield of the antibodies. final purified
final purified product product amount concentration sample [mg]
[mg/mL] Briakinumab 23.50 2.36 Ustekinumab 12.55 2.67 mAb 1 6.96
2.32 mAb 2 1.89 1.66 mAb 3 4.26 2.14 mAb 4 3.50 2.1 mAb 5 13.64
3.03 mAb 6 2.04 0.4 mAb 7 11.60 2.9 mAb 8 23.25 3.1 mAb 9 16.80
3.15 mAb 10 33.00 4.08
[0622] Purity and antibody integrity were analyzed after each
purification step by CE-SDS using microfluidic Labchip technology
(Caliper Life Science, USA). Five .mu.l of protein solution was
prepared for CE-SDS analysis using the HT Protein Express Reagent
Kit according manufacturer's instructions and analyzed on LabChip
GXII system using a HT Protein Express Chip. Data were analyzed
using LabChip GX Software.
TABLE-US-00035 TABLE 11 Overview biochemical characterization of
all mAbs. The concentration is given as the average of 3
measurements. Monomer contents are determined by integration of the
SEC chromatogram. Purity of antibody species is determined by CE-
SDS of the intact mAbs and after DTT-reduction. The hydro-
phobicity is presented relative to low and high hydrophobic RS. SEC
[%] CE-SDS [%] hydro- conc. Monomer Intact phobicity sample [mg/mL]
content mAb HC LC [%] Briakinumab 2.36 99.9 92 67 33 7 Ustekinumab
2.67 99.0 84 64 32 -1 mAb 1 2.32 99.4 74 66 31 -6 mAb 2 1.66 98.1
91 64 32 8 mAb 3 2.14 99.3 80 66 28 8 mAb 4 2.10 99.8 82 64 32 -4
mAb 5 3.03 99.5 90 70 30 13 mAb 6 0.40 97.1 95 66 32 12 mAb 7 2.90
97.2 85 65 33 13 mAb 8 3.10 98.9 85 64 34 24 mAb 9 3.15 99.1 80 70
29 16 mAb 10 4.08 98.6 88 70 28 34
[0623] Functional Characterization
[0624] The functional characterization includes analysis of the
interaction with the target (human IL-12) to test if Briakinumab
and Ustekinumab were produced correctly and the target binding is
still functional. The mAb variants were modified in the Fab region
and it is tested if these modifications alter the target binding.
Furthermore the interaction of the antibodies used in the mouse PK
study with mouse IL-12/-23 are analyzed to exclude target-mediated
clearance effects in the mouse study. In addition binding levels to
mouse Fc.gamma. receptor I (muFc.gamma.RI) are measured because
stronger binding to mouse Fc.gamma.RI could lead to a faster
decrease in a PK study due to faster uptake into antigen presenting
cells.
[0625] Interaction with Human IL-12
[0626] Briakinumab, Ustekinumab and the variants have structural
differences in the Fab region that can influence IL-12 binding,
therefore the results of all mAbs are presented in detail.
[0627] ELISA
[0628] The absorbance-concentration curves of the variants with
cross-over exchanges (mAb 1-6) and with modified charge
distribution (mAb 7-10) are shown in FIGS. 15 and 16, respectively.
The concentration of each mAb was calculated using the fit of the
Briakinumab calibration curve to obtain IL-12 binding relative to
Briakinumab (Briakinumab=100%). Binding differences of .ltoreq.30%
were assessed to show similar binding to IL-12 as Briakinumab,
differences of .gtoreq.30% indicate reduced binding to IL-12.
Briakinumab, Ustekinumab and mAbs with exchanged Fv domains (mAb 1
and mAb 2) show similar IL-12 binding profiles. The binding of
Briakinumab, Ustekinumab and mAb 2 ranges in a 20% window, mAb 3 in
a 30% window. MAbs with exchanged LCs (mAb 3and mAb 4) and mAbs
with exchanged CDRs (mAb 5 and mAb 6) do not bind to IL-12.
[0629] Briakinumab variants with modified charge distribution (mAb
7-9) bind IL-12 in a range of 30% relative to Briakinumab
indicating similar IL-12 binding. Only mAb 10 shows reduced IL-12
binding with 63% binding compared to Briakinumab.
[0630] Surface Plasmon Resonance
[0631] SPR was used to confirm the results of the target specific
ELISA. Ustekinumab and Briakinumab have nearly identical
association rate constant (k.sub.a) (k.sub.a (Briakinumab)
8*10.sup.5 1/Ms vs. k.sub.a (Ustekinumab) 9*10.sup.5 1/Ms). The
dissociation of IL-12 and the mAbs is very slow, therefore
calculation of the dissociation rate constant (k.sub.d) and
subsequently of the equilibrium dissociation constant (K.sub.D) may
differ from the actual values. Despite the limitation of the method
in this setting, the calculated values can give a general
evaluation and can be used to confirm the ELISA results.
Briakinumab and Ustekinumab bind IL-12 with high affinity and the
K.sub.D is in a low nM-range (K.sub.D (Briakinumab)=0.2 nM vs.
K.sub.D (Ustekinumab)=0.07 nM). The measured affinity of
Briakinumab with k.sub.a, k.sub.d and K.sub.D values of 8*10.sup.5
1/Ms, 6*10.sup.-5 1/s and 70 pM, respectively, are in agreement
with literature data (k.sub.a 5*10.sup.5 1/Ms, k.sub.d
5.1*10.sup.-5 1/s, K.sub.D=100 pM) ([51]). The high affinity of
Ustekinumab to IL-12 is also described in literature ([52]).
[0632] Table 12 summarizes the calculated kinetic parameters of the
target interaction.
[0633] Monoclonal antibodies with exchanged Fv domains (mAb 1and
mAb 2) and mAbs with modified charge distributions (mAb 7-10) have
affinities to IL-12 similar to Briakinumab and Ustekinumab. MAb 3
and mAb 5 do not bind to IL-12 and mAb 4 and mAb 6 show very weak
binding to IL-12. The data is in agreement with the ELISA
results.
TABLE-US-00036 TABLE 12 SPR parameters of mAbs and IL-12. K.sub.D,
k.sub.a and k.sub.d were calculated using steady state affinity.
sample k.sub.a [1/Ms] k.sub.d [1/s] K.sub.D [nM] Ustekinumab
9*10.sup.5 1.8*10.sup.-4 0.20 Briakinumab 8*10.sup.5 6*10.sup.-5
0.07 mAb 1 1.7*10.sup.6 4.1*10.sup.-4 0.24 mAb 2 1.2*10.sup.6
3*10.sup.-4 0.25 mAb 3 no binding no binding no binding mAb 4
1.2*10.sup.7 2.3 191 mAb 5 no binding no binding no binding mAb 6
2*10.sup.6 1.9*10.sup.-2 9.62 mAb 7 1*10.sup.6 7.9*10.sup.-5 0.08
mAb 8 1.2*10.sup.6 9.1*10.sup.-5 0.07 mAb 9 8.8*10.sup.6
1.3*10.sup.-4 0.01 mAb 10 1.4*10.sup.7 1.3*10.sup.-4 0.01
[0634] FcRn-mAb Affinity at pH 6.0
[0635] The K.sub.D was calculated relative to Ustekinumab
(Ustekinumab=1.0). For evaluation of the K.sub.D values, the
affinity of the mAbs and FcRn was assessed to be similar to the
Ustekinumab-FcRn affinity if differences were smaller than one
decimal power to the Ustekinumab-FcRn K.sub.D. K.sub.Ds were
assessed to be different if K.sub.D differences were bigger than
one decimal power to the Ustekinumab-FcRn K.sub.D. The FcRn
affinities at pH 6.0 fell in a narrow range for all mAbs.
Briakinumab had a relative K.sub.D of 0.2 and the variants ranged
between Briakinumab and Ustekinumab except for mAb 10 that had a
relative K.sub.D of 1.1.
TABLE-US-00037 TABLE 13 Relative K.sub.Ds of all mAbs to FcRn.
Relative K.sub.D values (Ustekinumab = 1) are presented as the mean
(n = 3) .+-. standard deviation. Sample rel. K.sub.D Ustekinumab 1
Briakinumab 0.2 .+-. 0.07 mAb 1 1.0 .+-. 0.22 mAb 2 0.3 .+-. 0.19
mAb 3 0.2 .+-. 0.06 mAb 4 0.5 .+-. 0.08 mAb 5 0.9 .+-. 0.16 mAb 6
0.4 .+-. 0.17 mAb 7 0.2 .+-. 0.03 mAb 8 0.4 .+-. 0.07 mAb 9 0.4
.+-. 0.04 mAb 10 1.1 .+-. 0.09
[0636] FcRn-mAb Dissociation
[0637] The dissociation of FcRn and the mAbs was analyzed by SPR
and FcRn affinity chromatography.
[0638] FcRn-mAb Dissociation Using SPR
[0639] For evaluation of the K.sub.D values, K.sub.D values below 1
.mu.M were assessed to show moderate affinity, between 1-5 .mu.M to
show weak affinity and above 5 .mu.M to show no binding to FcRn.
Briakinumab and Ustekinumab showed similar affinities at pH 6.0.
Ustekinumab showed very weak affinity at pH 6.6 and no affinity at
pH 6.8. In contrast, Briakinumab showed a moderate affinity up to
pH 6.8, weak affinity at pH 7.0 and no binding at pH 7.2.
TABLE-US-00038 TABLE 14 K.sub.D of Briakinumab and Ustekinumab to
FcRn. K.sub.DS were calculated using buffers with increasing pH
values. KD values higher than 5 .mu.M were classified as no
binding. Briakinumab K.sub.D Ustekinumab K.sub.D [.mu.M] [.mu.M] pH
6.0 0.09 0.39 pH 6.4 0.10 1.00 pH 6.6 0.36 3.10 pH 6.8 0.60 no
binding pH 7.0 4.20 no binding pH 7.2 no binding no binding
[0640] The biochemical characterization of all antibodies showed no
striking differences between Briakinumab, Ustekinumab and the
variants.
[0641] Generation of Antibody Fragments
[0642] The F(ab').sub.2 fragment and the Fc-region fragment were
prepared by incubation for 30 min. at 37.degree. C. using the
FabRICATOR-Kit (GENOVIS, Lund, Sweden). The resulting cleavage
products F(ab').sub.2 and Fc-region were separated on a size
exclusion chromatography (SEC) column (Superdex 200, GE Healthcare,
Zurich, Switzerland) using an AKTA Explorer chromatography system
(GE Healthcare, Uppsala, Sweden) and the peak fractions were
pooled. Molecular weight standards on the same column served to
identify the two cleavage products based on their retention
times.
[0643] FcRn Surface Plasmon Resonance (SPR) Analysis
[0644] The binding properties of the antibodies to FcRn were
analyzed by surface plasmon resonance (SPR) technology using a
BlAcore T100 instrument (BIAcore AB, Uppsala, Sweden). This system
is well established for the study of molecular interactions. It
allows a continuous real-time monitoring of ligand/analyte bindings
and thus the determination of kinetic parameters in various assay
settings. SPR-technology is based on the measurement of the
refractive index close to the surface of a gold coated biosensor
chip. Changes in the refractive index indicate mass changes on the
surface caused by the interaction of immobilized ligand with
analyte injected in solution. If molecules bind to an immobilized
ligand on the surface the mass increases, in case of dissociation
the mass decreases. In the current assay, the FcRn receptor was
immobilized onto a BIAcore CM5-biosensor chip (GE Healthcare
Bioscience, Uppsala, Sweden) via amine coupling to a level of 400
Response units (RU). The assay was carried out at room temperature
with PBS, 0.05% Tween20 pH 6.0 (GE Healthcare Bioscience) as
running and dilution buffer. 200 nM of native or oxidized antibody
samples were injected at a flow rate of 50 .mu.L/min at room
temperature. Association time was 180 s, dissociation phase took
360 s. Regeneration of the chip surface was reached by a short
injection of HBS-P, pH 8.0. Evaluation of SPR-data was performed by
comparison of the biological response signal height at 180 s after
injection and at 300 s after injection. The corresponding
parameters are the RU max level (180 s after injection) and late
stability (300 s after end of injection).
[0645] The steady state binding levels and the equilibrium
dissociation constants (K.sub.D) for huFcRn and the IgGs were
determined at pH 6.0 using a BIAcore T100 SPR instrument (GE
Healthcare, Little Chalfont, United Kingdom). Human FcRn was
immobilized on a BIAcore CM5-biosensor chip (GE Healthcare
Bioscience) via amine-coupling to a level of 50 response units
(RU). For mAb 5 and mAb 6, a CM4-biosensor chip was used. The assay
was performed using PBS with 0.05% Tween20 (both from Roche
Diagnostics, Mannheim, Germany) adjusted to pH 6.0 as running and
dilution buffer at room temperature. A concentration series of the
samples was prepared in a range of 1500 nM to 23 nM and each sample
was injected at a flow rate of 5 .mu.L/min. Association and
dissociation times of 600 and 360 seconds were used, respectively.
The chip was regenerated by injection of PBS containing 0.05%
Tween20 at pH 7.5. The equilibrium dissociation constant K.sub.D
was calculated as steady state affinity and normalized to the
K.sub.D of Ustekinumab.
[0646] Mice
[0647] B6.Cg-Fcgrt.sup.tm1/Dcr Tg(FCGRT)276Dcr mice deficient in
mouse FcRn .alpha.-chain gene, but hemizygous transgenic for a
human FcRn .alpha.-chain gene (muFcRn-/- huFcRn tg +/-, line 276)
were used for the pharmacokinetic studies [39]. Mouse husbandry was
carried out under specific pathogen free conditions. Mice were
obtained from the Jackson Laboratory (Bar Harbor, Me., USA)
(female, age 4-10 weeks, weight 17-22 g at time of dosing). All
animal experiments were approved by the Government of Upper
Bavaria, Germany (permit number 55.2-1-54-2532.2-28-10) and
performed in an AAALAC accredited animal facility according to the
European Union Normative for Care and Use of Experimental Animals.
The animals were housed in standard cages and had free access to
food and water during the whole study period.
[0648] Pharmacokinetic Studies
[0649] A single dose of antibody was injected i.v. via the lateral
tail vein at a dose level of 10 mg/kg. The mice were divided into 3
groups of 6 mice each to cover 9 serum collection time points in
total (at 0.08, 2, 8, 24, 48, 168, 336, 504 and 672 hours post
dose). Each mouse was subjected twice to retro-orbital bleeding,
performed under light anesthesia with Isoflurane.TM. (CP-Pharma
GmbH, Burgdorf, Germany); a third blood sample was collected at the
time of euthanasia. Blood was collected into serum tubes
(Microvette 500Z-Gel, Sarstedt, Numbrecht, Germany). After 2 h
incubation, samples were centrifuged for 3 min at 9.300 g to obtain
serum. After centrifugation, serum samples were stored frozen at
-20.degree. C. until analysis.
[0650] Determination of Human Antibody Serum Concentrations
[0651] Concentrations of Ustekinumab, Briakinumab, mAb 8 and mAb 9
in murine serum were determined by specific enzyme-linked
immunoassays. Biotinylated Interleukin 12 specific to the
antibodies and digoxigenin-labeled anti-human-Fc mouse monoclonal
antibody (Roche Diagnostics, Penzberg, Germany) were used for
capturing and detection, respectively. Streptavidin-coated
microtiter plates (Roche Diagnostics, Penzberg, Germany) were
coated with biotinylated capture antibody diluted in assay buffer
(Roche Diagnostics, Penzberg, Germany) for 1 h. After washing,
serum samples were added at various dilutions followed by another
incubation step for 1 h. After repeated washings, bound human
antibodies were detected by subsequent incubation with detection
antibody, followed by an anti-digoxigenin antibody conjugated to
horseradish peroxidase (HRP; Roche Diagnostics, Penzberg, Germany).
ABTS (2,2' Azino-di [3-ethylbenzthiazoline sulfonate]; Roche
Diagnostics, Germany) was used as HRP substrate to form a colored
reaction product. Absorbance of the resulting reaction product was
read at 405 nm with a reference wavelength at 490 nm using a Tecan
sunrise plate reader (Mannedorf, Switzerland).
[0652] All serum samples, positive and negative control samples
were analyzed in duplicates and calibrated against reference
standard.
[0653] PK Analysis
[0654] The pharmacokinetic parameters were calculated by
non-compartmental analysis using WinNonlin.TM. 1.1.1 (Pharsight,
CA, USA).
[0655] Briefly, area under the curve (AUC.sub.0-inf) values were
calculated by logarithmic trapezoidal method due to non-linear
decrease of the antibodies and extrapolated to infinity using the
apparent terminal rate constant .lamda.z, with extrapolation from
the observed concentration at the last time point.
[0656] Plasma clearance was calculated as Dose rate (D) divided by
AUC.sub.0-inf. The apparent terminal half-life (T1/2) was derived
from the equation T1/2=ln2/.lamda.z.
[0657] Statistical Analysis
[0658] Outlying serum concentrations were detected using the
Nalimov outlier test and were excluded from further analysis.
[0659] The Tukey's honest significant test (Tukey's HSD test) was
used as statistical test for analysis of statistically significant
differences in the terminal half-life.
[0660] Calculation of pH-Dependent Net Charge
[0661] pH dependent net charge ("titration curves") were calculated
with the open-source program EMBOSS iep assuming all cysteines
involved in disulfide bridges.
[0662] Generation of the Briakinumab Homology Model and Calculation
of Isopotential Surfaces
[0663] A homology model for the Briakinumab Fab fragment was
generated using modeller 9v7 using PDB structure 1 AQK [41] as a
template. The isopotential surfaces for Briakinumab and Ustekinumab
Fabs were calculated from this model (Briakinumab) or the crystal
structure of Ustekinumab (PDB ID 3HMX), respectively. Structures
were protonated using the "prepare protein" protocol with CHARMm
force field in DiscoveryStudio Pro, Version 3.5 (Accelrys Inc., San
Diego, USA) at pH 7.4 and an ionic strength of 0.145 M. The
electrostatic potential was calculated with the "electrostatic
potential" protocol in DiscoveryStudio Pro, which invokes the
DelPhi program [42].
[0664] Molecular Dynamics Simulation of Briakinumab and
Ustekinumab-FcRn Complexes
[0665] Homology models of Briakinumab and Ustekinumab as complete
IgGs were built using DiscoveryStudio Pro, Version 3.5 with the
crystal structure of a complete IgG1 (PDB ID 1HZH) without glycans
as a template. This simplification was considered appropriate
because in-vitro, glycosylation does not have a significant effect
on FcRn binding [43]. The Fab domains in this template were
replaced by the Fab structures described above after alignment of
their C.sub.H1 and C.sub.L domains. A homology model of human FcRn
was built with DiscoveryStudio Pro using the rat FcRn-Fc complex
(PDB ID 1I1A) as a template. Missing residues were built with the
"prepare protein" script of DiscoveryStudio Pro. The homology model
of the human FcRn was modeled to both heavy chains of the
Briakinumab and Ustekinumab IgG models by superimposing the C-alpha
atoms of the rat Fc domains within 5 .ANG. around the FcRn with
their homologous counterparts on the human Fc-region. For the MD
simulation, a disulfide bond in the FcRn:Fc interface (between
residue 108 in FcRn and residue 255 in Fc, FIG. S1) was introduced
to prevent dissociation of the complex during the time of
simulation. The resulting structures represent a complete IgG
bearing two copies of the FcRn/.beta.2mg heterodimer.
[0666] Molecular dynamics (MD) simulations of the IgG-FcRn
complexes were performed with GROMACS 4.6.2 simulation software
package (available at www.gromacs.org) [44], essentially as
described by Kortkhonjia et al. [45]. The simulations were
performed in parallel on 160 processors of a computer cluster
running the Linux operating system. The OPLSAA force field [46] was
used and the structures were fully solvated with approx. 128'000
TIP3 water molecules. Chloride or sodium atoms were added to
neutralize the overall charge of the system. A truncated octahedron
with periodic boundary conditions was used with a 7.5 Angstrom
border around the protein. Electrostatic interactions were
calculated using PME summation with real-space electrostatic
cut-off of 1.0 nm. The Lennard-Jones potential was cut off at 1.0
nm. LINCS was used to constrain all protein bond lengths, allowing
a time-step of 2 fs. The temperature was kept constant at 300 K
using the V-rescale algorithm. Following energy minimization
(target: maximum force<1000 kJ/mol/nm), a 30 ps equilibration
was performed before a trajectory was simulated over a length of
100 ns.
[0667] Calculation of the IgG-FcRn Interaction Energy
[0668] The electrostatic contribution to the non-bonded
interactions between the FcRn and the Fab domain which approaches
the FcRn in the MD trajectory was calculated with DiscoveryStudio
Pro. For the energy calculation, the protein was protonated at pH
7.4, an ionic strength of 145 mM and a temperature of 37.degree. C.
with same settings as described above. Structures were minimized
with a maximum of 1000 steps of the "smart minimizer" protocol
before interaction energies were calculated using the "calculate
interaction energy" protocol with the CHARMm force field in
DiscoveryStudio Pro. Implicit waters and the GBMV electrostatics
model were used. This calculation was performed at the beginning of
the trajectory (0 ns) and at 96 to 100 ns in 1 ns intervals.
EXAMPLE 1
[0669] Preparation of FcRn Affinity Column
[0670] Expression of FcRn in HEK293 Cells
[0671] FcRn was transiently expressed by transfection of HEK293
cells with two plasmids containing the coding sequence of FcRn and
of beta-2-microglobulin. The transfected cells were cultured in
shaker flasks at 36.5.degree. C., 120 rpm (shaker amplitude 5 cm),
80% humidity and 7% CO.sub.2. The cells were diluted every 2-3 days
to a density of 3 to 4*10.sup.5 cells/ml.
[0672] For transient expression, a 14 l stainless steel bioreactor
was started with a culture volume of 8 l at 36.5.degree. C., pH
7.0.+-.0.2, pO.sub.2 35% (gassing with N.sub.2 and air, total gas
flow 200 ml min.sup.-1) and a stirrer speed of 100-400 rpm. When
the cell density reached 20*10.sup.5 cells/ml, 10 mg plasmid DNA
(equimolar amounts of both plasmids) was diluted in 400 ml Opti-MEM
(Invitrogen). 20 ml of 293fectin (Invitrogen) was added to this
mixture, which was then incubated for 15 minutes at room
temperature and subsequently transferred into the fermenter. From
the next day on, the cells were supplied with nutrients in
continuous mode: a feed solution was added at a rate of 500 ml per
day and glucose as needed to keep the level above 2 g/l. The
supernatant was harvested 7 days after transfection using a swing
head centrifuge with 1 l buckets: 4000 rpm for 90 minutes. The
supernatant (13 L) was cleared by a Sartobran P filter (0.45
.mu.m+0.2 .mu.m, Sartorius) and the FcRn beta-2-microglobulin
complex was purified therefrom.
[0673] Biotinylation of Neonatal Fc Receptor
[0674] 3 mg FcRn were solved/diluted in 5.3 mL 20 mM sodium
dihydrogenphosphate buffer containing 150 mM sodium chloride and
added to 250 .mu.l PBS and 1 tablet complete protease inhibitor
(complete ULTRA Tablets, Roche Diagnostics GmbH). FcRn was
biotinylated using the biotinylation kit from Avidity according to
the manufacturer instructions (Bulk BIRA, Avidity LLC). The
biotinylation reaction was done at room temperature overnight.
[0675] The biotinylated FcRn was dialyzed against 20 mM sodium
dihydrogen phosphate buffer comprising 150 mM NaCl, pH 7.5 at
4.degree. C. overnight to remove excess of biotin.
[0676] Coupling to Streptavidin Sepharose
[0677] For coupling to streptavidin sepharose, one gram
streptavidin sepharose (GE Healthcare, United Kingdom) was added to
the biotinylated and dialyzed FcRn and incubated at 4.degree. C.
overnight. The FcRn derivatized sepharose was filled in a 1 ml XK
column (GE Healthcare, United Kingdom) and the FcRn column then was
equilibrated with 20 mM 2-(N-morpholine)-ethanesulfonic acid (MES)
sodium salt buffer containing 140 mM sodium chloride, pH 5.5.
EXAMPLE 2
[0678] Chromatography Using the FcRn Affinity Column and pH
Gradient
[0679] The receptor derivatized sepharose was filled in a 1 ml XK
column (GE Healthcare) and the FcRn column then was equilibrated
with 20 mM 2-(N-morpholine)-ethanesulfonic acid (MES) buffer
containing 140 mM NaCl, pH 5.5.
[0680] Conditions: [0681] column dimensions: 50 mm.times.5 mm
[0682] bed height: 5 cm [0683] loading: 30 .mu.g sample [0684]
equilibration buffer: 20 mM IViES, with 140 mM NaCl, adjusted to pH
5.5 [0685] elution buffer: 20 mM Tris/HCl, with 140 mM NaCl,
adjusted to pH 8.8 [0686] elution: 7.5 CV equilibration buffer, in
120 min. to 100% elution buffer, 10 CV elution buffer
[0687] The samples were prepared in 20 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, 140 mM
sodium chloride, pH 5.5. Each sample contained 30 .mu.g mAb per
injection. Antibodies were eluted by a linear pH gradient from pH
5.5 to 8.8 within 120 minutes using 20 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, 140 mM
sodium chloride, pH 5.5 and 20 mM tris(hydroxymethyl)aminomethane
TRIS, 140 mM sodium chloride, pH 8.8 as eluents and a flow rate of
0.5 ml/min. FcRn column chromatography shows binding at acidic pH
(pH 5.5-6.0) and release at higher pH values. For complete elution
of the antibodies, the pH is increased in the gradient up to pH
8.8. The chromatograms were integrated manually by using the
Chromeleon software (Dionex, Germany). The experiments were
performed at room temperature. The elution profile was obtained by
continuous measurement of the absorbance at 280 nm. To determine
the elution pH at particular retention times, samples were
collected every 5 minutes and the pH was measured offline.
EXAMPLE 3
[0688] Chromatography Using the FcRn Affinity Column, pH Gradient
and High Salt Conditions
[0689] The receptor derivatized sepharose was filled in a 1 ml XK
column (GE Healthcare) and the FcRn column then was equilibrated
with 20 mM 2-(N-morpholine)-ethanesulfonic acid (MES) buffer
containing 400 mM NaCl, pH 5.5.
[0690] Conditions: [0691] column dimensions: 50 mm.times.5 mm
[0692] bed height: 5 cm [0693] loading: 30 .mu.g sample [0694]
equilibration buffer: 20 mM IViES, with 400 mM NaCl, adjusted to pH
5.5 [0695] elution buffer: 20 mM Tris/HCl, with 400 mM NaCl,
adjusted to pH 8.8 [0696] elution: 7.5 CV equilibration buffer, in
120 min. to 100% elution buffer, 10 CV elution buffer
[0697] The samples were prepared in 20 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, 400 mM
sodium chloride, pH 5.5. Each sample contained 30 .mu.g mAb per
injection. Antibodies were eluted by a linear pH gradient from pH
5.5 to 8.8 within 120 minutes using 20 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, 400 mM
sodium chloride, pH 5.5 and 20 mM tris(hydroxymethyl)aminomethane
TRIS, 400 mM sodium chloride, pH 8.8 as eluents and a flow rate of
0.5 ml/min. FcRn column chromatography shows binding at acidic pH
(pH 5.5-6.0) and release at higher pH values. For complete elution
of the antibodies, the pH is increased in the gradient up to pH
8.8. The chromatograms were integrated manually by using the
Chromeleon software (Dionex, Germany). The experiments were
performed at room temperature. The elution profile was obtained by
continuous measurement of the absorbance at 280 nm. To determine
the elution pH at particular retention times, samples were
collected every 5 minutes and the pH was measured offline.
EXAMPLE 4
[0698] Chromatography Using the FcRn Affinity Column and Salt
Gradient
[0699] The receptor derivatized sepharose was filled in a 1 ml XK
column (GE Healthcare) and the FcRn column then was equilibrated
with 10 mM 2-(N-morpholine)-ethanesulfonic acid (MES) buffer, pH
7.8.
[0700] Conditions: [0701] column dimensions: 50 mm.times.5 mm
[0702] bed height: 5 cm [0703] loading: 30 .mu.g sample [0704]
equilibration buffer: 10 mM IViES, adjusted to pH 7.8 [0705]
elution buffer: 10 mM MES, with 250 mM NaCl, adjusted to pH [0706]
elution: 7.5 CV equilibration buffer, in 60 min. to 100% elution
buffer, 10 CV elution buffer
[0707] The samples were prepared in 10 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, pH 7.8.
Each sample contained 30 .mu.g mAb per injection. Antibodies were
eluted by a linear salt gradient from 0 nM to 250 nM sodium
chloride within 60 minutes using 10 mM
2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, pH 7.8 and
10 mM 2-(N-morpholine)-ethanesulfonic acid (MES) sodium salt, 250
mM sodium chloride, pH 7.8 as eluents and a flow rate of 0.5
ml/min. The experiments were performed at room temperature. The
elution profile was obtained by continuous measurement of the
absorbance at 280 nm. The chromatograms were integrated manually by
using the Chromeleon software (Dionex, Germany).
EXAMPLE 5
[0708] Chromatography Using the FcRn Affinity Column
[0709] The receptor derivatized sepharose was filled in a 1 ml XK
column (GE Healthcare) and the FcRn column then was equilibrated
with 20 mM 2-(N-morpholine)-ethanesulfonic acid (MES) buffer
containing 150 mM NaCl, pH 5.5.
[0710] Conditions: [0711] column dimensions: 50 mm.times.5 mm
[0712] bed height: 5 cm [0713] loading: 50 .mu.g sample [0714]
equilibration buffer: 20 mM IViES, with 150 mM NaCl, adjusted to pH
5.5 [0715] elution buffer: 20 mM Tris/HCl, with 150 mM NaCl,
adjusted to pH 8.8 [0716] elution: 7.5 CV equilibration buffer, in
30 CV to 100% elution buffer, 10 CV elution buffer
[0717] Antibody or fusion protein samples containing 50 to 100
.mu.g of protein were adjusted to pH 5.5 and applied to the FcRn
column using AKTA explorer 10 XT or Dionex Summit (Dionex, Idstein,
Germany). The column with 5 cm bed height was then washed with 5-10
column volumes of equilibration buffer 20 mM MES, 150 mM NaCl, pH
5.5. The affinity-bound Fc-containing proteins were eluted with a
pH gradient to 20 mM Tris/HCl, 150 mM NaCl, pH 8.8, in 30 column
volumes. For complete elution of modified antibodies, the pH was
increased in the gradient up to pH 8.8. The experiments were
carried out at room temperature. The elution profile was obtained
by continuous measurement of the absorbance at 280 nm. The time
taken for an analyte peak, X, to reach the detector after sample
injection was called the retention time.
EXAMPLE 6
[0718] Correlation of Retention Time on FcRn Column to in Vivo Half
Life
[0719] In vivo half-life was measured in human FcRn transgenic
C57BL/6J mice after single i.v. administration of 10 mg/kg (n=8)
and compared to the retention time on the FcRn column (see Table
15). It was found that antibodies that showed a late elution from
the FcRn column had a longer half-life in FcRn transgenic mice.
TABLE-US-00039 TABLE 15 retention time in vivo half-life antibody
[min] [h] anti-Abeta antibody (wild-type) 45.5 103 +/- 51
anti-IGF-1R antibody (wild-type) 45.5 97 +/- 9 anti-IGF-1R antibody
(YTE-mutant) 58 211 +/- 41
EXAMPLE 7
[0720] Purification of Human FcRn, Mouse FcRn and Cynomolgus
FcRn
[0721] The clarified supernatants containing hexahis-tagged
proteins were loaded on a Ni-NTA affinity chromatography resin
(Qiagen, Hanbrechtikon, Switzerland) at 4.degree. C. After wash
steps with 20 mM sodium phosphate buffer comprising 500 mM NaCl at
pH 7.4 and containing 20 mM respectively 100 mM imidazole, proteins
were eluted at a flow rate of 2 ml/min using batch elution with the
same buffer containing 300 mM imidazole on an AKTA Prime
chromatography system (Amersham Pharmacia Biotech, Uppsala,
Sweden). Fractions were pooled and further purified in sodium
phosphate buffer containing 500 mM NaCl on size exclusion
chromatography (Superdex.TM. 200, GE Healthcare, Zurich,
Switzerland). Purified proteins were quantified using a Nanodrop
spectrophotometer (Nanodrop Technologies, Wilmington, Del.) and
analyzed by SDS PAGE on NuPAGE 4-12% Bis-Tris gels in MES buffer
under denaturing and reducing conditions.
EXAMPLE 8
[0722] Mouse and Cynomolgus FcRn Affinity Column
Chromatographies
[0723] In the following Table 16 retention times of exemplary human
antibodies on affinity columns comprising FcRn from Cynomolgus
monkey are given. Data were obtained using the following
conditions: Elution buffer: 20 mM TRIS/HCl, 150 mM NaCl, pH 8.5.
Further description: see Example 2. The term YTE-mutant denotes the
triple mutant
TABLE-US-00040 TABLE 16 antibody retention time [min] anti-IGF-1R
antibody (wild-type) 51.2 anti-IGF-1R antibody (YTE-mutant)
63.0
[0724] In the following Table 17 retention times of exemplary human
antibodies on murine FcRn are given. Data were obtained using the
following conditions: 1.2 mg receptor coupled on 1 ml Sepharose.
Elution buffer: 20 mM TRIS/HCl, 150 mM NaCl, pH 8.5. Further
description: see Example 2. The YTE-mutants are not included in
this table as they could not have been eluted unless the pH of the
elution buffer had been adjusted to 9.5.
TABLE-US-00041 TABLE 17 antibody retention time [min] anti-IGF-1R
antibody (wild-type) 48.8
[0725] Cynomolgus FcRn affinity column behaves similar as human
FcRn affinity column concerning binding of humanized antibodies. On
the other hand binding of humanized antibodies to murine FcRn
column is stronger than to human FcRn affinity column as can be
seen by later retention.
EXAMPLE 9
[0726] Generation of Antibody Fragments
[0727] The F(ab').sub.2 fragment and the Fc-region fragment were
prepared by cleavage of the full-length antibody 1:1 diluted with
100 mM Tris, pH 8.0, by adding 1 .mu.g IdeS cysteine protease per
50 .mu.g antibody and incubation for 2 h at 37.degree. C. The
resulting cleavage products F(ab').sub.2 and Fc were separated on a
size exclusion chromatography (SEC) column (Superdex 200, GE
Healthcare, Zurich, Switzerland) using an AKTA Explorer
chromatography system (GE Healthcare, Uppsala, Sweden) and the peak
fractions were pooled. Molecular weight standards on the same
column served to identify the two cleavage products based on their
retention times.
[0728] Retention times of full-length antibodies varied notably. In
contrast, the retention times of the respective Fc portions of all
tested antibodies virtually did not differ from each other
(<1%).
[0729] When plasmin was used for cleavage of the full-length
antibodies, the same findings were obtained (data not shown).
EXAMPLE 10
[0730] Pharmacokinetic Study in Human FcRn Mice
[0731] All procedures were carried out in accordance with the
guidelines of the Association for Assessment and Accreditation of
Laboratory Animal Care (www.aaalac.org). The study was authorized
by the Regional Council of Oberbayern, Germany.
[0732] Male and female C57BL/6J mice (background); mouse FcRn
deficient, but hemizygous transgenic for human FcRn (huFcRn (276)
-/tg (30, 31) were used throughout the pharmacokinetic study.
[0733] At the time of administration, the animals weighed between
17 and 25 g. The respective antibody was given as a single
intravenous bolus injection via the tail vein. Due to limited blood
volume of mice, three groups of four male and four female animals
each were required to cover nine sampling time points, i.e. three
sampling time points per animal. Blood samples were taken in group
1 at 5 min, 24 hours and 336 hours, in group 2 at 2 hours, 168
hours and 504 hours and in group 3 at 8 hours, 48 hours and 672
hours after administration. Blood samples of about 100 .mu.L were
obtained by retrobulbar puncture and stored at room temperature for
60 min. to allow clotting. Serum samples of at least 40 .mu.L were
obtained by centrifugation at 9,300.times.g at 4.degree. C. for 3
min and immediately frozen and stored at -20.degree. C. until
assayed.
[0734] Serum concentrations of the human therapeutic antibodies in
murine serum were determined by an antigen-captured enzyme linked
immunosorbent assay (ELISA) specific for the antigen binding region
(Fab) of the administered antibody and its variants. All reagents
or samples were incubated at room temperature on a shaker at 400
rpm. Each washing step included three cycles. Briefly,
streptavidin-coated microtiter plates were coated with biotinylated
antibody diluted in assay buffer. After washing with
phosphate-buffered saline-polysorbate 20 (Tween20), serum samples
in various dilutions were added and incubated for 1 h. After
washing, bound human therapeutic antibodies were detected by
subsequent incubation with human Fcy-specific monoclonal antibody
Fab fragments conjugated with digoxigenin that do not cross react
with mouse IgG. After washing, an anti-digoxigenin antibody
conjugated with horseradish peroxidase (HRP) was added and
incubated for 1 h. After washing, ABTS
(2,2'Azino-di[3-ethylbenzthiazoline sulfonate; Roche Diagnostics,
Germany) was added as HRP substrate to form a colored reaction
product. Absorbance of the resulting reaction product was read at
405 nm with a reference wavelength at 490 nm. All serum samples and
positive or negative control samples were analyzed in replicates
and calibrated against reference standard.
[0735] The pharmacokinetic parameters were calculated by
non-compartmental analysis, using the pharmacokinetic evaluation
program WinNonlin.TM. (Pharsight, St. Louis, Mo., USA), version
5.2.1. Briefly, the area under the concentration/time curve
AUC(0-672) was calculated by linear trapezoidal rule (with linear
interpolation) from time 0 to infinity. The apparent terminal
half-life (T.sub.1/2) was derived from the equation:
T.sub.1/2=ln2/.lamda.z. Total body clearance (CL) was calculated as
dose/AUC. Statistically significant differences in the
pharmacokinetic parameters between the wild-type antibody and its
variants were determined by ANOVA analysis.
[0736] The pharmacokinetic study in C57BL/6J mice deficient for
mouse FcRn, but hemizygous transgenic for human FcRn (huFcRn (276)
-/tg) showed that the YTE mutation enhanced pharmacokinetics of the
antibody. At a level of statistical significance, the YTE mutant
had a 1.74-fold higher AUC(0-672), a 1.95-fold slower clearance and
a 2.2-fold longer terminal half-life in comparison with wild-type
antibody (Table 14).
TABLE-US-00042 TABLE 18 Pharmacokinetic parameters for wild-type
antibody and its triple mutant YTE obtained by non-compartmental
analysis of serum concentrations measured by ELISA after a single
i.v. bolus injection of 10 mg/kg to human FcRn transgenic mice.
Mean .+-. SD, n = 8 per group, ANOVA analysis of significance in
comparison with wild-type antibody (+++, p < 0.001). AUC(0-672),
area under the serum concentration-time curve from time 0 to 672 h.
AUC(0-672) clearance terminal half-life antibody [h*[g/ml]
[ml/min/kg] [h] wild-type antibody 15.693 .+-. 1.879 0.0107 .+-.
0.0013 96.8 .+-. 8.9 YTE-mutant 27.359 .+-. 2.731 0.0055 .+-.
0.0006 211.4 .+-. 40.6
EXAMPLE 11
[0737] Pharmacokinetic Study in Human FcRn Mice
[0738] All procedures were carried out in accordance with the
guidelines of the Association for Assessment and Accreditation of
Laboratory Animal Care (www.aaalac.org). The study was authorized
by the Regional Council of Oberbayern, Germany.
[0739] Male and female C57BL/6J mice (background); mouse FcRn
deficient, but hemizygous transgenic for human FcRn (huFcRn (276)
-/tg (30, 31) were used throughout the pharmacokinetic study.
[0740] Four antibodies were used in the in vivo study: Briakinumab,
Ustekinumab, mAb 8, and mAb 9.
[0741] The respective antibody was given as a single intravenous
bolus injection (10 mg/kg). Due to limited blood volume of mice,
three groups of six animals each were required to cover nine
sampling time points. The last sampling point was four weeks after
administration.
[0742] The results are shown in FIG. 3.
TABLE-US-00043 TABLE 19 Pharmacokinetic parameters for Briakinumab,
Ustekinumab and antibody variants mAb 8 and mAb 9. AUC 0-inf Cl Vss
T 1/2 mAb [h*.mu.g/mL] [mL/min/kg] [1/kg] [h] Briakinumab 4228 .+-.
119 0.0394 .+-. 0.001 0.162 .+-. 0.015 48 .+-. 9 Ustekinumab 12238
.+-. 864 0.0137 .+-. 0.001 0.116 .+-. 0.006 137 .+-. 48 mAb 8 11459
.+-. 843 0.0146 .+-. 0.001 0.101 .+-. 0.013 78 .+-. 22 mAb 9 16039
.+-. 936 0.0104 .+-. 0.001 0.099 .+-. 0.011 109 .+-. 13
[0743] To confirm that differences in the terminal half-lives in
human FcRn transgenic mice were caused by different FcRn-mAb
interactions, a second in vivo study in FcRn knockout mice was
conducted. In order to reduce the number of mice used in this
study, only three antibodies were used: Briakinumab, Ustekinumab
and mAb 9.
[0744] After i.v. administration of 10 mg/kg antibody the clearance
of all antibodies is much faster in FcRn knockout mice than in
human FcRn transgenic mice due to missing FcRn-mediated
IgG-recycling. Division in alpha and beta phase is not clearly
definable because antibodies are eliminated very fast. It can be
demonstrated that Briakinumab has a different pharmacokinetic
behavior with faster distribution in the first hours after
administration compared to Ustekinumab and mAb 9. These findings
were also observed in human FcRn transgenic mice indicating that
the distribution process in the first hours after administration is
not FcRn-mediated.
[0745] The following PK parameters were calculated and summarized:
AUC.sub.0-inf, Cl, V.sub.SS and T.sub.1/2.
TABLE-US-00044 TABLE 20 PK parameters in FcRn knockout mice. PK
parameters were calculated after administration of 10 mg/kg to 6
animals per group. PK data represent the mean .+-. standard
deviation. AUC.sub.0-inf Cl V.sub.SS T.sub.1/2 sample [h*mg/mL]
[mL/min/kg] [L/kg] [h] Briakinumab 1.0 .+-. 0.1 0.163 .+-. 0.008
0.113 .+-. 0.004 10.6 .+-. 0.6 Ustekinumab 3.3 .+-. 0.1 0.051 .+-.
0.002 0.077 .+-. 0.004 22.8 .+-. 1.1 mAb 9 2.9 .+-. 0.1 0.059 .+-.
0.003 0.093 .+-. 0.005 23.2 .+-. 1.2
[0746] Ustekinumab and mAb 9 are comparable regarding
AUC.sub.0-inf, Cl, V.sub.SS and T.sub.1/2. Briakinumab has a
smaller AUC.sub.0-inf, faster Cl and smaller T.sub.1/2 than
Ustekinumab and mAb 9. The calculation of the T.sub.1/2might differ
from the actual value, because time points after 3 and 4 days would
have been needed to calculate the terminal half-lives more
precisely.
[0747] The statistical analysis of the terminal half-lives was
calculated using the Tukey HSD Test. A statistical significance
could be detected between the terminal half-lives of Briakinumab
and Ustekinumab and of Briakinumab and mAb 9.
[0748] The formation of ADAs was tested by detection of drug/ADA
immune complexes. In FcRn knockout mice administration of 10 mg/kg
Briakinumab resulted in formation of Briakinumab/ADA immune
complexes after about 168-192 hours (7-8 days).
TABLE-US-00045 TABLE 21 ADA-positive samples after Briakinumab
administration in FcRn knockout mice. Serum concentrations of each
sampling time point after i.v. administration of 10 mg/kg
Briakinumab in FcRn knockout mice. ADA- positive samples are
illustrated as * and ** describing formation of moderate and severe
drug/ADA immune complexes, respectively. time M 1 M 2 M 3 M 4 M 5 M
6 [h/d] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 192 181 200 187 186 178 2 86 79 74 91 89 91 8 31 32
36 31 29 33 24/1 6.7 12 7.9 11 6.9 8.0 48/2 1.8 2.3 2.7 2.6 2.4 2.2
168/7 b.l.q. b.l.q. b.l.q. ** b.l.q. b.l.q. ** b.l.q. 192/8 b.l.q.
* b.l.q. * b.l.q. ** b.l.q. * b.l.q. ** b.l.q. ** 216/9 b.l.q. *
b.l.q. b.l.q. ** b.l.q. ** b.l.q. * b.l.q. ** 336/14 b.l.q. b.l.q.
** b.l.q. * b.l.q. ** b.l.q. ** b.l.q. * b.l.q. = below limit of
quantification
[0749] After administration of mAb 9, drug/ADA immune complexes
were also first detected after about 168 hours (7 days, Table 28).
After administration of Ustekinumab, no Ustekinumab/ADA complexes
were detected in FcRn knockout mice (Table 27Table 27:). The
concentration-time curves of Briakinumab and mAb 9 show no rapid
decrease due to ADA formation. Ustekinumab and mAb 9 have very
similar concentration-time curves indicating that ADA formation
after mAb 9 administration does not influence PK.
TABLE-US-00046 TABLE 22 Serum concentrations of Briakinumab in
human FcRn transgenic mice. Serum concentrations are determined
after administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 201 174 188 192 214 194 194 13 2 109 105 106 105
110 110 107 2.4 8 50 53 53 54 56 58 54 2.8 24/1 37 32 30 34 35 35
34 2.4 48/2 27 23 24 27 24 28 25 2.2 168/7 6.2 5.4 6.7 6.7 * 6.4
6.8 6.4 0.5 336/14 0.4 1.0 * 0.1 ** 0.2 ** 0.7 * 0.1 ** 0.4 0.4
504/21 b.l.q. b.l.q. ** b.l.q. ** b.l.q. ** b.l.q. ** b.l.q. **
b.l.q. -- 672/28 b.l.q. b.l.q. ** b.l.q. b.l.q. ** b.l.q. ** b.l.q.
** b.l.q. --
TABLE-US-00047 TABLE 23 Serum concentrations of Ustekinumab in
human FcRn transgenic mice. Serum concentrations are determined
after administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 205 219 212 225 202 226 215 10 2 156 161 191 175
153 215 175 24 8 120 116 110 114 114 115 115 3.2 24/1 73 77 72 73 *
69 76 73 2.9 48/2 58 57 64 57 56 59 59 2.7 168/7 18 19 27 22 20 25
22 3.5 336/14 7.2 6.8 8.0 6.2 8.3 4.8 6.9 1.3 504/21 2.2 2.2 2.5
2.3 2.5 3.0 * 2.5 0.3 672/28 0.9 0.8 2.1 1.1 1.0 1.8 1.3 0.5
TABLE-US-00048 TABLE 24 Serum concentrations of mAb 8 in human FcRn
transgenic mice. Serum concentrations are determined after
administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 241 177 174 203 220 217 206 26 2 146 175 155 120
109 146 142 24 8 90 95 97 106 108 85 97 8.7 24/1 76 55 55 59 80 72
66 10.9 48/2 65 52 56 71 71 68 64 8.1 168/7 24 28 25 28 27 21** 25
2.6 336/14 7.7 2.9 * 4.4 1.3 * 2.4 ** 6.7 * 4.2 2.5 504/21 3.1 0.1
** 2.3 2.1 0.1 ** 0.1 1.3 1.4 672/28 b.l.q. ** b.l.q. ** b.l.q. **
b.l.q. ** b.l.q. * b.l.q. ** b.l.q. --
TABLE-US-00049 TABLE 25 Serum concentrations of mAb 9 in human FcRn
transgenic mice. Serum concentrations are determined after
administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 194 254 198 270 295 233 241 40 2 151 183 124 143
165 137 150 21 8 126 104 109 89 111 114 109 12 24/1 73 80 64 89 94
77 80 11 48/2 65 81 66 69 83 60 71 9.2 168/7 34 37 31 30 * 38 36 34
3.1 336/14 13 15 ** 14 ** 15 ** 13 ** 9.6 ** 13 1.9 504/21 4.2 0.3
** 4.5 * 4.9 ** 0.1 ** 4.8 ** 3.1 2.3 672/28 0.1 ** 2.4 * 1.4 * 1.5
* 2.5 0.1 * 1.3 1.1
TABLE-US-00050 TABLE 26 Serum concentrations of Briakinumab in FcRn
knockout mice. Serum concentrations are determined after
administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 192 181 200 187 186 178 187 8.0 2 86 79 74 91 89 91
85 7.1 8 31 32 36 31 29 33 32 2.3 24/1 6.7 12 7.9 11 6.9 8.0 8.7
2.1 48/2 1.8 2.3 2.7 2.6 2.4 2.2 2.3 0.3 168/7 b.l.q. b.l.q. b.l.q.
** b.l.q. b.l.q. ** b.l.q. b.l.q. -- 192/8 b.l.q. * b.l.q. * b.l.q.
** b.l.q. * b.l.q. ** b.l.q. ** b.l.q. -- 216/9 b.l.q. * b.l.q.
b.l.q. ** b.l.q. ** b.l.q. * b.l.q. ** b.l.q. -- 336/14 b.l.q.
b.l.q. ** b.l.q. * b.l.q. ** b.l.q. ** b.l.q. * b.l.q. --
TABLE-US-00051 TABLE 27 Serum concentrations of Ustekinumab in FcRn
knockout mice. Serum concentrations are determined after
administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] 0.08 209 221 229 228 220 219 221 7.4 2 153
164 158 155 157 149 156 4.8 8 80 95 88 96 104 95 93 8.0 24/1 50 47
37 44 38 37 42 5.5 48/2 16 16 17 13 11 14 15 2.2 168/7 0.4 0.6 0.4
0.3 0.6 0.4 0.5 0.1 192/8 0.5 0.2 0.1 0.1 0.2 0.4 0.2 0.2 216/9
b.l.q. b.l.q. b.l.q. b.l.q. b.l.q. b.l.q. b.l.q. -- 336/14 b.l.q.
b.l.q. b.l.q. b.l.q. b.l.q. b.l.q. b.l.q. --
TABLE-US-00052 TABLE 28 Serum concentrations of mAb 9 in FcRn
knockout mice. Serum concentrations are determined after
administration of a 10 mg/kg single dose i.v. injection to 6
animals per group. ADA-positive samples are illustrated as * and **
for formation of moderate and severe drug/ADA immune complexes,
respectively. time M 1 M 2 M 3 M 4 M 5 M 6 Mean SD [h/d] [.mu.g/mL]
[.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL] [.mu.g/mL]
[.mu.g/mL] 0.08 249 292 232 214 242 226 242 27 2 119 130 139 136
123 129 129 7.3 8 62 65 74 80 83 87 75 10 24/1 31 37 37 32 35 36 35
2.6 48/2 16 15 17 12 13 16 15 1.9 168/7 0.2 * 0.4 ** 0.5 0.5 0.5
0.3 0.4 0.1 192/8 0.2 0.1 ** 0.2 0.1 ** 0.1 ** 0.2 0.2 0.2 216/9
b.l.q. b.l.q. ** b.l.q. ** b.l.q. b.l.q. * b.l.q. ** b.l.q. --
336/14 b.l.q. * b.l.q. ** b.l.q. b.l.q. b.l.q. * b.l.q. b.l.q. --
Sequence CWU 1
1
451445PRTArtificial Sequenceanti-IL-1R antibody IgG 1 HC 1Gln Leu
Gln Leu Gln Glu Ser Gly Pro Gly Leu Val Lys Pro Ser Gln 1 5 10 15
Thr Leu Ser Leu Thr Cys Thr Val Ser Gly Leu Ser Leu Thr Ser Asn 20
25 30 Ser Ile Thr Trp Ile Arg Gln Pro Pro Gly Lys Gly Pro Glu Trp
Met 35 40 45 Gly Met Ile Trp Ser Asn Gly Asp Thr Asp Tyr Ser Thr
Ser Leu Lys 50 55 60 Ser Arg Leu Thr Ile Ser Lys Asp Thr Ser Lys
Ser Gln Val Val Leu 65 70 75 80 Thr Met Thr Asn Met Asp Pro Val Asp
Thr Ala Thr Tyr Tyr Cys Ala 85 90 95 Arg Tyr Asn Tyr Tyr Phe Asp
Tyr Trp Gly Gln Gly Thr Leu Val Thr 100 105 110 Val Ser Ser Ala Ser
Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro 115 120 125 Ser Ser Lys
Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu Val 130 135 140 Lys
Asp Tyr Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala 145 150
155 160 Leu Thr Ser Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser
Gly 165 170 175 Leu Tyr Ser Leu Ser Ser Val Val Thr Val Pro Ser Ser
Ser Leu Gly 180 185 190 Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys
Pro Ser Asn Thr Lys 195 200 205 Val Asp Lys Lys Val Glu Pro Lys Ser
Cys Asp Lys Thr His Thr Cys 210 215 220 Pro Pro Cys Pro Ala Pro Glu
Leu Leu Gly Gly Pro Ser Val Phe Leu 225 230 235 240 Phe Pro Pro Lys
Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu 245 250 255 Val Thr
Cys Val Val Val Asp Val Ser His Glu Asp Pro Glu Val Lys 260 265 270
Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys Thr Lys 275
280 285 Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr Arg Val Val Ser Val
Leu 290 295 300 Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu Tyr
Lys Cys Lys 305 310 315 320 Val Ser Asn Lys Ala Leu Pro Ala Pro Ile
Glu Lys Thr Ile Ser Lys 325 330 335 Ala Lys Gly Gln Pro Arg Glu Pro
Gln Val Tyr Thr Leu Pro Pro Ser 340 345 350 Arg Asp Glu Leu Thr Lys
Asn Gln Val Ser Leu Thr Cys Leu Val Lys 355 360 365 Gly Phe Tyr Pro
Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln 370 375 380 Pro Glu
Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly 385 390 395
400 Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp Gln
405 410 415 Gln Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala Leu
His Asn 420 425 430 His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro Gly
Lys 435 440 445 2218PRTArtificial Sequenceanti-IL-1R antibody IgG 1
LC 2Asp Ile Val Leu Thr Gln Ser Pro Ala Thr Leu Ser Leu Ser Pro Gly
1 5 10 15 Glu Arg Ala Thr Leu Ser Cys Lys Ala Ser Gln Asn Val Asp
Asn Arg 20 25 30 Gly Val Ser Tyr Val His Trp Tyr Gln Gln Lys Pro
Gly Gln Ala Pro 35 40 45 Lys Leu Leu Ile Tyr Lys Gly Ser Asn Leu
Ala Phe Gly Val Pro Ser 50 55 60 Arg Phe Ser Gly Ser Gly Ser Gly
Thr Asp Phe Thr Leu Thr Ile Ser 65 70 75 80 Ser Leu Gln Pro Glu Asp
Phe Ala Thr Tyr Phe Cys Gln Gln Ser Lys 85 90 95 Gly His Pro Asp
Thr Phe Gly Ala Gly Thr Lys Leu Glu Leu Lys Arg 100 105 110 Thr Val
Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln 115 120 125
Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr 130
135 140 Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln
Ser 145 150 155 160 Gly Asn Ser Gln Glu Ser Val Thr Glu Gln Asp Ser
Lys Asp Ser Thr 165 170 175 Tyr Ser Leu Ser Ser Thr Leu Thr Leu Ser
Lys Ala Asp Tyr Glu Lys 180 185 190 His Lys Val Tyr Ala Cys Glu Val
Thr His Gln Gly Leu Ser Ser Pro 195 200 205 Val Thr Lys Ser Phe Asn
Arg Gly Glu Cys 210 215 3442PRTArtificial Sequenceanti-IL-1R
antibody IgG 4 HC 3Gln Leu Gln Leu Gln Glu Ser Gly Pro Gly Leu Val
Lys Pro Ser Gln 1 5 10 15 Thr Leu Ser Leu Thr Cys Thr Val Ser Gly
Leu Ser Leu Thr Ser Asn 20 25 30 Ser Ile Thr Trp Ile Arg Gln Pro
Pro Gly Lys Gly Pro Glu Trp Met 35 40 45 Gly Met Ile Trp Ser Asn
Gly Asp Thr Asp Tyr Ser Thr Ser Leu Lys 50 55 60 Ser Arg Leu Thr
Ile Ser Lys Asp Thr Ser Lys Ser Gln Val Val Leu 65 70 75 80 Thr Met
Thr Asn Met Asp Pro Val Asp Thr Ala Thr Tyr Tyr Cys Ala 85 90 95
Arg Tyr Asn Tyr Tyr Phe Asp Tyr Trp Gly Gln Gly Thr Leu Val Thr 100
105 110 Val Ser Ser Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala
Pro 115 120 125 Cys Ser Arg Ser Thr Ser Glu Ser Thr Ala Ala Leu Gly
Cys Leu Val 130 135 140 Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser
Trp Asn Ser Gly Ala 145 150 155 160 Leu Thr Ser Gly Val His Thr Phe
Pro Ala Val Leu Gln Ser Ser Gly 165 170 175 Leu Tyr Ser Leu Ser Ser
Val Val Thr Val Pro Ser Ser Ser Leu Gly 180 185 190 Thr Lys Thr Tyr
Thr Cys Asn Val Asp His Lys Pro Ser Asn Thr Lys 195 200 205 Val Asp
Lys Arg Val Glu Ser Lys Tyr Gly Pro Pro Cys Pro Ser Cys 210 215 220
Pro Ala Pro Glu Phe Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro 225
230 235 240 Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val
Thr Cys 245 250 255 Val Val Val Asp Val Ser Gln Glu Asp Pro Glu Val
Gln Phe Asn Trp 260 265 270 Tyr Val Asp Gly Val Glu Val His Asn Ala
Lys Thr Lys Pro Arg Glu 275 280 285 Glu Gln Phe Asn Ser Thr Tyr Arg
Val Val Ser Val Leu Thr Val Leu 290 295 300 His Gln Asp Trp Leu Asn
Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn 305 310 315 320 Lys Gly Leu
Pro Ser Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly 325 330 335 Gln
Pro Arg Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Gln Glu Glu 340 345
350 Met Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr
355 360 365 Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro
Glu Asn 370 375 380 Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp
Gly Ser Phe Phe 385 390 395 400 Leu Tyr Ser Arg Leu Thr Val Asp Lys
Ser Arg Trp Gln Glu Gly Asn 405 410 415 Val Phe Ser Cys Ser Val Met
His Glu Ala Leu His Asn His Tyr Thr 420 425 430 Gln Lys Ser Leu Ser
Leu Ser Leu Gly Lys 435 440 4218PRTArtificial Sequenceanti-IL-1R
antibody IgG 4 LC 4Asp Ile Val Leu Thr Gln Ser Pro Ala Thr Leu Ser
Leu Ser Pro Gly 1 5 10 15 Glu Arg Ala Thr Leu Ser Cys Lys Ala Ser
Gln Asn Val Asp Asn Arg 20 25 30 Gly Val Ser Tyr Val His Trp Tyr
Gln Gln Lys Pro Gly Gln Ala Pro 35 40 45 Lys Leu Leu Ile Tyr Lys
Gly Ser Asn Leu Ala Phe Gly Val Pro Ser 50 55 60 Arg Phe Ser Gly
Ser Gly Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser 65 70 75 80 Ser Leu
Gln Pro Glu Asp Phe Ala Thr Tyr Phe Cys Gln Gln Ser Lys 85 90 95
Gly His Pro Asp Thr Phe Gly Ala Gly Thr Lys Leu Glu Leu Lys Arg 100
105 110 Thr Val Ala Ala Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu
Gln 115 120 125 Leu Lys Ser Gly Thr Ala Ser Val Val Cys Leu Leu Asn
Asn Phe Tyr 130 135 140 Pro Arg Glu Ala Lys Val Gln Trp Lys Val Asp
Asn Ala Leu Gln Ser 145 150 155 160 Gly Asn Ser Gln Glu Ser Val Thr
Glu Gln Asp Ser Lys Asp Ser Thr 165 170 175 Tyr Ser Leu Ser Ser Thr
Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys 180 185 190 His Lys Val Tyr
Ala Cys Glu Val Thr His Gln Gly Leu Ser Ser Pro 195 200 205 Val Thr
Lys Ser Phe Asn Arg Gly Glu Cys 210 215 5107PRTHomo sapiens 5Ala
Pro Glu Leu Leu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys 1 5 10
15 Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val
20 25 30 Trp Asp Val Ser His Glu Asp Pro Glu Val Lys Phe Asn Trp
Tyr Val 35 40 45 Asp Gly Val Glu Val His Asn Ala Lys Thr Lys Pro
Arg Glu Glu Gln 50 55 60 Glu Ser Thr Tyr Arg Trp Ser Val Leu Thr
Val Leu His Gln Asp Trp 65 70 75 80 Leu Asn Gly Lys Glu Tyr Lys Cys
Lys Val Ser Asn Lys Ala Leu Pro 85 90 95 Ala Pro Ile Glu Lys Thr
Ile Ser Lys Ala Lys 100 105 6106PRTHomo sapiens 6Gly Gln Pro Arg
Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Asp 1 5 10 15 Glu Leu
Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe 20 25 30
Tyr Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn Gly Gln Pro Glu 35
40 45 Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser Asp Gly Ser
Phe 50 55 60 Phe Leu Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg Trp
Gln Gln Gly 65 70 75 80 Asn Val Phe Ser Cys Ser Val Met His Glu Ala
Leu His Asn His Tyr 85 90 95 Thr Gln Lys Ser Leu Ser Leu Ser Pro
Gly 100 105 7227PRTHomo sapiens 7Asp Lys Thr His Thr Cys Pro Pro
Cys Pro Ala Pro Glu Leu Leu Gly 1 5 10 15 Gly Pro Ser Val Phe Leu
Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr
Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 35 40 45 Glu Asp
Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50 55 60
His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65
70 75 80 Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu
Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu
Pro Ala Pro Ile 100 105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln
Pro Arg Glu Pro Gln Val 115 120 125 Tyr Thr Leu Pro Pro Ser Arg Asp
Glu Leu Thr Lys Asn Gln Val Ser 130 135 140 Leu Thr Cys Leu Val Lys
Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 145 150 155 160 Trp Glu Ser
Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175 Val
Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 180 185
190 Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met
195 200 205 His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser
Leu Ser 210 215 220 Pro Gly Lys 225 8326PRTHomo sapiens 8Ala Ser
Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Cys Ser Arg 1 5 10 15
Ser Thr Ser Glu Ser Thr Ala Ala Leu Gly Cys Leu Val Lys Asp Tyr 20
25 30 Phe Pro Glu Pro Val Thr Val Ser Trp Asn Ser Gly Ala Leu Thr
Ser 35 40 45 Gly Val His Thr Phe Pro Ala Val Leu Gln Ser Ser Gly
Leu Tyr Ser 50 55 60 Leu Ser Ser Val Val Thr Val Pro Ser Ser Asn
Phe Gly Thr Gln Thr 65 70 75 80 Tyr Thr Cys Asn Val Asp His Lys Pro
Ser Asn Thr Lys Val Asp Lys 85 90 95 Thr Val Glu Arg Lys Cys Cys
Val Glu Cys Pro Pro Cys Pro Ala Pro 100 105 110 Pro Val Ala Gly Pro
Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp 115 120 125 Thr Leu Met
Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp 130 135 140 Val
Ser His Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly 145 150
155 160 Val Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe
Asn 165 170 175 Ser Thr Phe Arg Val Val Ser Val Leu Thr Val Val His
Gln Asp Trp 180 185 190 Leu Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser
Asn Lys Gly Leu Pro 195 200 205 Ala Pro Ile Glu Lys Thr Ile Ser Lys
Thr Lys Gly Gln Pro Arg Glu 210 215 220 Pro Gln Val Tyr Thr Leu Pro
Pro Ser Arg Glu Glu Met Thr Lys Asn 225 230 235 240 Gln Val Ser Leu
Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile 245 250 255 Ser Val
Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr 260 265 270
Thr Pro Pro Met Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys 275
280 285 Leu Thr Val Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser
Cys 290 295 300 Ser Val Met His Glu Ala Leu His Asn His Tyr Thr Gln
Lys Ser Leu 305 310 315 320 Ser Leu Ser Pro Gly Lys 325 9377PRTHomo
sapiens 9Ala Ser Thr Lys Gly Pro Ser Val Phe Pro Leu Ala Pro Cys
Ser Arg 1 5 10 15 Ser Thr Ser Gly Gly Thr Ala Ala Leu Gly Cys Leu
Val Lys Asp Tyr 20 25 30 Phe Pro Glu Pro Val Thr Val Ser Trp Asn
Ser Gly Ala Leu Thr Ser 35 40 45 Gly Val His Thr Phe Pro Ala Val
Leu Gln Ser Ser Gly Leu Tyr Ser 50 55 60 Leu Ser Ser Val Val Thr
Val Pro Ser Ser Ser Leu Gly Thr Gln Thr 65 70 75 80 Tyr Thr Cys Asn
Val Asn His Lys Pro Ser Asn Thr Lys Val Asp Lys 85 90 95 Arg Val
Glu Leu Lys Thr Pro Leu Gly Asp Thr Thr His Thr Cys Pro 100 105 110
Arg Cys Pro Glu Pro Lys Ser Cys Asp Thr Pro Pro Pro Cys Pro Arg 115
120 125 Cys Pro Glu Pro Lys Ser Cys Asp Thr Pro Pro Pro Cys Pro Arg
Cys 130 135 140 Pro Glu Pro Lys Ser Cys Asp Thr Pro Pro Pro Cys Pro
Arg Cys Pro 145 150 155 160 Ala Pro Glu Leu Leu Gly Gly Pro Ser Val
Phe Leu Phe Pro Pro Lys 165
170 175 Pro Lys Asp Thr Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys
Val 180 185 190 Val Val Asp Val Ser His Glu Asp Pro Glu Val Gln Phe
Lys Trp Tyr 195 200 205 Val Asp Gly Val Glu Val His Asn Ala Lys Thr
Lys Pro Arg Glu Glu 210 215 220 Gln Tyr Asn Ser Thr Phe Arg Val Val
Ser Val Leu Thr Val Leu His 225 230 235 240 Gln Asp Trp Leu Asn Gly
Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys 245 250 255 Ala Leu Pro Ala
Pro Ile Glu Lys Thr Ile Ser Lys Thr Lys Gly Gln 260 265 270 Pro Arg
Glu Pro Gln Val Tyr Thr Leu Pro Pro Ser Arg Glu Glu Met 275 280 285
Thr Lys Asn Gln Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro 290
295 300 Ser Asp Ile Ala Val Glu Trp Glu Ser Ser Gly Gln Pro Glu Asn
Asn 305 310 315 320 Tyr Asn Thr Thr Pro Pro Met Leu Asp Ser Asp Gly
Ser Phe Phe Leu 325 330 335 Tyr Ser Lys Leu Thr Val Asp Lys Ser Arg
Trp Gln Gln Gly Asn Ile 340 345 350 Phe Ser Cys Ser Val Met His Glu
Ala Leu His Asn Arg Phe Thr Gln 355 360 365 Lys Ser Leu Ser Leu Ser
Pro Gly Lys 370 375 10229PRTHomo sapiens 10Glu Ser Lys Tyr Gly Pro
Pro Cys Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu Gly Gly Pro
Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met
Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45
Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50
55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn
Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln
Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
Lys Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala
Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr Leu Pro Pro
Ser Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Thr Cys
Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu
Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175
Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu 180
185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys
Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys
Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225 11227PRTArtificial
Sequencehuman IgG1 Fc-region derived Fc-region polypeptide with the
mutations L234A, L235A 11Asp Lys Thr His Thr Cys Pro Pro Cys Pro
Ala Pro Glu Ala Ala Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro
Pro Lys Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu
Val Thr Cys Val Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu
Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn
Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80
Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85
90 95 Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro
Ile 100 105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu
Pro Gln Val 115 120 125 Tyr Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr
Lys Asn Gln Val Ser 130 135 140 Leu Thr Cys Leu Val Lys Gly Phe Tyr
Pro Ser Asp Ile Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln
Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser
Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 180 185 190 Asp Lys
Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205
His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210
215 220 Pro Gly Lys 225 12227PRTArtificial Sequencehuman IgG1
Fc-region derived Fc-region polypeptide with Y349C, T366S, L368A
and Y407V mutations 12Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala
Pro Glu Leu Leu Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro Pro
Lys Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu Val
Thr Cys Val Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu Val
Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn Ala
Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg
Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85 90
95 Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile
100 105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro
Gln Val 115 120 125 Cys Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys
Asn Gln Val Ser 130 135 140 Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro
Ser Asp Ile Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro
Glu Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp
Gly Ser Phe Phe Leu Val Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser
Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205 His
Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215
220 Pro Gly Lys 225 13227PRTArtificial Sequencehuman IgG1 Fc-region
derived Fc-region polypeptide with S354C, T366W mutations 13Asp Lys
Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 1 5 10 15
Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 20
25 30 Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser
His 35 40 45 Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly
Val Glu Val 50 55 60 His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln
Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val Val Ser Val Leu Thr Val Leu
His Gln Asp Trp Leu Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys Val
Ser Asn Lys Ala Leu Pro Ala Pro Ile 100 105 110 Glu Lys Thr Ile Ser
Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 115 120 125 Tyr Thr Leu
Pro Pro Cys Arg Asp Glu Leu Thr Lys Asn Gln Val Ser 130 135 140 Leu
Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 145 150
155 160 Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro
Pro 165 170 175 Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys
Leu Thr Val 180 185 190 Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe
Ser Cys Ser Val Met 195 200 205 His Glu Ala Leu His Asn His Tyr Thr
Gln Lys Ser Leu Ser Leu Ser 210 215 220 Pro Gly Lys 225
14227PRTArtificial Sequencehuman IgG1 Fc-region derived Fc-region
polypeptide with L234A, L235A mutations and Y349C, T366S, L368A,
Y407V mutations 14Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro
Glu Ala Ala Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro Pro Lys
Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu Val Thr
Cys Val Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu Val Lys
Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn Ala Lys
Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val
Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85 90 95
Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 100
105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln
Val 115 120 125 Cys Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn
Gln Val Ser 130 135 140 Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser
Asp Ile Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu
Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly
Ser Phe Phe Leu Val Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg
Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205 His Glu
Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220
Pro Gly Lys 225 15227PRTArtificial Sequencehuman IgG1 Fc-region
derived Fc-region polypeptide with a L234A, L235A and S354C, T366W
mutations 15Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Ala
Ala Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys
Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu Val Thr Cys Val
Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu Val Lys Phe Asn
Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn Ala Lys Thr Lys
Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val Val Ser
Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85 90 95 Lys Glu
Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile 100 105 110
Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 115
120 125 Tyr Thr Leu Pro Pro Cys Arg Asp Glu Leu Thr Lys Asn Gln Val
Ser 130 135 140 Leu Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile
Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn
Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly Ser Phe
Phe Leu Tyr Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg Trp Gln
Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205 His Glu Ala Leu
His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220 Pro Gly
Lys 225 16227PRTArtificial Sequencehuman IgG1 Fc-region derived
Fc-region polypeptide with a P329G mutation 16Asp Lys Thr His Thr
Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 1 5 10 15 Gly Pro Ser
Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 20 25 30 Ile
Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 35 40
45 Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val
50 55 60 His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser
Thr Tyr 65 70 75 80 Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp
Trp Leu Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys
Ala Leu Gly Ala Pro Ile 100 105 110 Glu Lys Thr Ile Ser Lys Ala Lys
Gly Gln Pro Arg Glu Pro Gln Val 115 120 125 Tyr Thr Leu Pro Pro Ser
Arg Asp Glu Leu Thr Lys Asn Gln Val Ser 130 135 140 Leu Thr Cys Leu
Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 145 150 155 160 Trp
Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 165 170
175 Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val
180 185 190 Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser
Val Met 195 200 205 His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser
Leu Ser Leu Ser 210 215 220 Pro Gly Lys 225 17227PRTArtificial
Sequencehuman IgG1 Fc-region derived Fc-region polypeptide with
L234A, L235A mutations and P329G mutation 17Asp Lys Thr His Thr Cys
Pro Pro Cys Pro Ala Pro Glu Ala Ala Gly 1 5 10 15 Gly Pro Ser Val
Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser
Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser His 35 40 45
Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50
55 60 His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr
Tyr 65 70 75 80 Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp
Leu Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala
Leu Gly Ala Pro Ile 100 105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly
Gln Pro Arg Glu Pro Gln Val 115 120 125 Tyr Thr Leu Pro Pro Ser Arg
Asp Glu Leu Thr Lys Asn Gln Val Ser 130 135 140 Leu Thr Cys Leu Val
Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 145 150 155 160 Trp Glu
Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175
Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 180
185 190 Asp Lys Ser Arg Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val
Met 195 200 205 His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu
Ser Leu Ser 210 215 220 Pro Gly Lys 225 18227PRTArtificial
Sequencehuman IgG1 Fc-region derived Fc-region polypeptide with a
P239G mutation and Y349C, T366S, L368A, Y407V mutations 18Asp Lys
Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 1 5 10 15
Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met 20
25 30 Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val Ser
His 35 40 45 Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp Gly
Val Glu Val 50 55 60 His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln
Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val Val Ser Val Leu Thr Val Leu
His Gln Asp Trp Leu Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys Val
Ser Asn Lys Ala Leu Gly Ala Pro Ile 100 105 110 Glu Lys Thr Ile Ser
Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 115 120 125 Cys Thr Leu
Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn Gln Val Ser 130
135 140 Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val
Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys
Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly Ser Phe Phe Leu
Val Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg Trp Gln Gln Gly
Asn Val Phe Ser Cys Ser Val Met 195 200 205 His Glu Ala Leu His Asn
His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220 Pro Gly Lys 225
19227PRTArtificial Sequencehuman IgG1 Fc-region derived Fc-region
polypeptide with a P329G mutation and S354C, T366W mutation 19Asp
Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly 1 5 10
15 Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu Met
20 25 30 Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val
Ser His 35 40 45 Glu Asp Pro Glu Val Lys Phe Asn Trp Tyr Val Asp
Gly Val Glu Val 50 55 60 His Asn Ala Lys Thr Lys Pro Arg Glu Glu
Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val Val Ser Val Leu Thr Val
Leu His Gln Asp Trp Leu Asn Gly 85 90 95 Lys Glu Tyr Lys Cys Lys
Val Ser Asn Lys Ala Leu Gly Ala Pro Ile 100 105 110 Glu Lys Thr Ile
Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 115 120 125 Tyr Thr
Leu Pro Pro Cys Arg Asp Glu Leu Thr Lys Asn Gln Val Ser 130 135 140
Leu Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val Glu 145
150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr
Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser
Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg Trp Gln Gln Gly Asn Val
Phe Ser Cys Ser Val Met 195 200 205 His Glu Ala Leu His Asn His Tyr
Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220 Pro Gly Lys 225
20227PRTArtificial Sequencehuman IgG1 Fc-region derived Fc-region
polypeptide with L234A, L235A, P329G and Y349C, T366S, L368A, Y407V
mutations 20Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Ala
Ala Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys
Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu Val Thr Cys Val
Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu Val Lys Phe Asn
Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn Ala Lys Thr Lys
Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val Val Ser
Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85 90 95 Lys Glu
Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Gly Ala Pro Ile 100 105 110
Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val 115
120 125 Cys Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn Gln Val
Ser 130 135 140 Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser Asp Ile
Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn
Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly Ser Phe
Phe Leu Val Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg Trp Gln
Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205 His Glu Ala Leu
His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220 Pro Gly
Lys 225 21227PRTArtificial Sequencehuman IgG1 Fc-region derived
Fc-region polypeptide with L234A, L235A, P329G mutations and S354C,
T366W mutations 21Asp Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro
Glu Ala Ala Gly 1 5 10 15 Gly Pro Ser Val Phe Leu Phe Pro Pro Lys
Pro Lys Asp Thr Leu Met 20 25 30 Ile Ser Arg Thr Pro Glu Val Thr
Cys Val Val Val Asp Val Ser His 35 40 45 Glu Asp Pro Glu Val Lys
Phe Asn Trp Tyr Val Asp Gly Val Glu Val 50 55 60 His Asn Ala Lys
Thr Lys Pro Arg Glu Glu Gln Tyr Asn Ser Thr Tyr 65 70 75 80 Arg Val
Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly 85 90 95
Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Ala Leu Gly Ala Pro Ile 100
105 110 Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln
Val 115 120 125 Tyr Thr Leu Pro Pro Cys Arg Asp Glu Leu Thr Lys Asn
Gln Val Ser 130 135 140 Leu Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser
Asp Ile Ala Val Glu 145 150 155 160 Trp Glu Ser Asn Gly Gln Pro Glu
Asn Asn Tyr Lys Thr Thr Pro Pro 165 170 175 Val Leu Asp Ser Asp Gly
Ser Phe Phe Leu Tyr Ser Lys Leu Thr Val 180 185 190 Asp Lys Ser Arg
Trp Gln Gln Gly Asn Val Phe Ser Cys Ser Val Met 195 200 205 His Glu
Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser 210 215 220
Pro Gly Lys 225 22229PRTArtificial Sequencehuman IgG4 Fc-region
derived Fc-region polypeptide with S228P and L235E mutations 22Glu
Ser Lys Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro Glu Phe 1 5 10
15 Glu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr
20 25 30 Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val
Asp Val 35 40 45 Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr
Val Asp Gly Val 50 55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg
Glu Glu Gln Phe Asn Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu
Thr Val Leu His Gln Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys
Cys Lys Val Ser Asn Lys Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys
Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val
Tyr Thr Leu Pro Pro Ser Gln Glu Glu Met Thr Lys Asn Gln 130 135 140
Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145
150 155 160 Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys
Thr Thr 165 170 175 Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu
Tyr Ser Arg Leu 180 185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly
Asn Val Phe Ser Cys Ser 195 200 205 Val Met His Glu Ala Leu His Asn
His Tyr Thr Gln Lys Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225
23229PRTArtificial Sequencehuman IgG4 Fc-region derived Fc-region
polypeptide with S228P, L235E mutations and P329G mutation 23Glu
Ser Lys Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro Glu Phe 1 5 10
15 Glu Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr
20 25 30 Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val
Asp Val 35 40 45 Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr
Val Asp Gly Val 50 55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg
Glu Glu Gln Phe Asn Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu
Thr Val Leu His Gln Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys
Cys Lys Val Ser Asn Lys Gly Leu Gly Ser 100 105 110 Ser Ile Glu Lys
Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val
Tyr Thr Leu Pro Pro Ser Gln Glu Glu Met Thr Lys Asn Gln 130 135 140
Val Ser Leu Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145
150 155 160 Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys
Thr Thr 165 170 175 Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu
Tyr Ser Arg Leu 180 185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly
Asn Val Phe Ser Cys Ser 195 200 205 Val Met His Glu Ala Leu His Asn
His Tyr Thr Gln Lys Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225
24229PRTArtificial Sequencehuman IgG4 Fc-region derived Fc-region
polypeptide with S354C, T366W mutations 24Glu Ser Lys Tyr Gly Pro
Pro Cys Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu Gly Gly Pro
Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met
Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45
Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50
55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn
Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln
Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
Lys Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala
Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr Leu Pro Pro
Cys Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Trp Cys
Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu
Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175
Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu 180
185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys
Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys
Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225 25229PRTArtificial
Sequencehuman IgG4 Fc-region derived Fc-region polypeptide with
Y349C, T366S, L368A, Y407V mutations 25Glu Ser Lys Tyr Gly Pro Pro
Cys Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu Gly Gly Pro Ser
Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met Ile
Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45 Ser
Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50 55
60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser
65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp
Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys
Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys
Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Cys Thr Leu Pro Pro Ser
Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Ser Cys Ala
Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu Trp
Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175 Pro
Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Val Ser Arg Leu 180 185
190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys Ser
195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser
Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225 26229PRTArtificial
Sequencehuman IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E and S354C, T366W mutations 26Glu Ser Lys Tyr Gly Pro
Pro Cys Pro Pro Cys Pro Ala Pro Glu Phe 1 5 10 15 Glu Gly Gly Pro
Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met
Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45
Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50
55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn
Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln
Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn
Lys Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala
Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr Leu Pro Pro
Cys Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Trp Cys
Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu
Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175
Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu 180
185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys
Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys
Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225 27229PRTArtificial
Sequencehuman IgG4 Fc-region derived Fc-region polypeptide with a
S228P, L235E and Y349C, T366S, L368A, Y407V mutations 27Glu Ser Lys
Tyr Gly Pro Pro Cys Pro Pro Cys Pro Ala Pro Glu Phe 1 5 10 15 Glu
Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25
30 Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val
35 40 45 Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp
Gly Val 50 55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu
Gln Phe Asn Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val
Leu His Gln Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys
Val Ser Asn Lys Gly Leu Pro Ser 100 105 110 Ser Ile Glu Lys Thr Ile
Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Cys Thr
Leu Pro Pro Ser Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser
Leu Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155
160 Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr
165 170 175 Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Val Ser
Arg Leu 180 185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val
Phe Ser Cys Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr
Thr Gln Lys Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225
28229PRTArtificial Sequencehuman IgG4 Fc-region derived Fc-region
polypeptide with a P329G mutation 28Glu Ser Lys Tyr Gly Pro Pro Cys
Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu Gly Gly Pro Ser Val
Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met Ile Ser
Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45 Ser Gln
Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50 55 60
Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser 65
70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp
Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys
Gly Leu Gly Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys
Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr Leu Pro Pro Ser
Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Thr Cys Leu
Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu Trp
Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175 Pro
Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu 180 185
190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys Ser
195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser
Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225 29229PRTArtificial
Sequencehuman IgG4 Fc-region derived Fc-region polypeptide with a
P239G and Y349C, T366S, L368A, Y407V mutations 29Glu Ser Lys Tyr
Gly Pro Pro Cys Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu Gly
Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30
Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35
40 45 Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly
Val 50 55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln
Phe Asn Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu
His Gln Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val
Ser Asn Lys Gly Leu Gly Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser
Lys Ala Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Cys Thr Leu
Pro Pro Ser Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu
Ser Cys Ala Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160
Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165
170 175 Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Val Ser Arg
Leu 180 185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe
Ser Cys Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr
Gln Lys Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225
30229PRTArtificial Sequencehuman IgG4 Fc-region derived Fc-region
polypeptide with a P329G and S354C, T366W mutations 30Glu Ser Lys
Tyr Gly Pro Pro Cys Pro Ser Cys Pro Ala Pro Glu Phe 1 5 10 15 Leu
Gly Gly Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25
30 Leu Met Ile Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp Val
35 40 45 Ser Gln Glu Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp
Gly Val 50 55 60 Glu Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu
Gln Phe Asn Ser 65 70 75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val
Leu His Gln Asp Trp Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys
Val Ser Asn Lys Gly Leu Gly Ser 100 105 110 Ser Ile Glu Lys Thr Ile
Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr
Leu Pro Pro Cys Gln Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser
Leu Trp Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155
160 Val Glu Trp Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr
165 170 175 Pro Pro Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser
Arg Leu 180 185 190 Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val
Phe Ser Cys Ser 195 200 205 Val Met His Glu Ala Leu His Asn His Tyr
Thr Gln Lys Ser Leu Ser 210 215 220 Leu Ser Leu Gly Lys 225
31229PRTArtificial Sequencehuman IgG4 Fc-region derived Fc-region
polypeptide with a S228P, L235E, P329G and Y349C, T366S, L368A,
Y407V mutations 31Glu Ser Lys Tyr Gly Pro Pro Cys Pro Pro Cys Pro
Ala Pro Glu Phe 1 5 10 15 Glu Gly Gly Pro Ser Val Phe Leu Phe Pro
Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met Ile Ser Arg Thr Pro Glu
Val Thr Cys Val Val Val Asp Val 35 40 45 Ser Gln Glu Asp Pro Glu
Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50 55 60 Glu Val His Asn
Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser 65 70 75 80 Thr Tyr
Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp Leu 85 90 95
Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Gly Leu Gly Ser 100
105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu
Pro 115 120 125 Gln Val Cys Thr Leu Pro Pro Ser Gln Glu Glu Met Thr
Lys Asn Gln 130 135 140 Val Ser Leu Ser Cys Ala Val Lys Gly Phe Tyr
Pro Ser Asp Ile Ala 145 150 155 160 Val Glu Trp Glu Ser Asn Gly Gln
Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175 Pro Pro Val Leu Asp Ser
Asp Gly Ser Phe Phe Leu Val Ser Arg Leu 180 185 190 Thr Val Asp Lys
Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys Ser 195 200 205 Val Met
His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu Ser 210 215 220
Leu Ser Leu Gly Lys 225 32229PRTArtificial Sequencehuman IgG4
Fc-region derived Fc-region polypeptide with a S228P, L235E, P329G
and S354C, T366W mutations 32Glu Ser Lys Tyr Gly Pro Pro Cys Pro
Pro Cys Pro Ala Pro Glu Phe 1 5 10 15 Glu Gly Gly Pro Ser Val Phe
Leu Phe Pro Pro Lys Pro Lys Asp Thr 20 25 30 Leu Met Ile Ser Arg
Thr Pro Glu Val Thr Cys Val Val Val Asp Val 35 40 45 Ser Gln Glu
Asp Pro Glu Val Gln Phe Asn Trp Tyr Val Asp Gly Val 50 55 60 Glu
Val His Asn Ala Lys Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser 65 70
75 80 Thr Tyr Arg Val Val Ser Val Leu Thr Val Leu His Gln Asp Trp
Leu 85 90 95 Asn Gly Lys Glu Tyr Lys Cys Lys Val Ser Asn Lys Gly
Leu Gly Ser 100 105 110 Ser Ile Glu Lys Thr Ile Ser Lys Ala Lys Gly
Gln Pro Arg Glu Pro 115 120 125 Gln Val Tyr Thr Leu Pro Pro Cys Gln
Glu Glu Met Thr Lys Asn Gln 130 135 140 Val Ser Leu Trp Cys Leu Val
Lys Gly Phe Tyr Pro Ser Asp Ile Ala 145 150 155 160 Val Glu Trp Glu
Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr Thr 165 170 175 Pro Pro
Val Leu Asp Ser Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu 180 185 190
Thr Val Asp Lys Ser Arg Trp Gln Glu Gly Asn Val Phe Ser Cys Ser 195
200 205 Val Met His Glu Ala Leu His Asn His Tyr Thr Gln Lys Ser Leu
Ser 210 215 220 Leu Ser Leu Gly Lys 225 33274PRTHomo sapiens 33Ala
Glu Ser His Leu Ser Leu Leu Tyr His Leu Thr Ala Val Ser Ser 1 5 10
15 Pro Ala Pro Gly Thr Pro Ala Phe Trp Val Ser Gly Trp Leu Gly Pro
20 25 30 Gln Gln Tyr Leu Ser Tyr Asn Ser Leu Arg Gly Glu Ala Glu
Pro Cys 35 40 45 Gly Ala Trp Val Trp Glu Asn Gln Val Ser Trp Tyr
Trp Glu Lys Glu 50 55 60 Thr Thr Asp Leu Arg Ile Lys Glu Lys Leu
Phe Leu Glu Ala Phe Lys 65 70 75 80 Ala Leu Gly Gly Lys Gly Pro Tyr
Thr Leu Gln Gly Leu Leu Gly Cys 85 90 95 Glu Leu Gly Pro Asp Asn
Thr Ser Val Pro Thr Ala Lys Phe Ala Leu 100 105 110 Asn Gly Glu Glu
Phe Met Asn Phe Asp Leu Lys Gln Gly Thr Trp Gly 115 120 125 Gly Asp
Trp Pro Glu Ala Leu Ala Ile Ser Gln Arg Trp Gln Gln Gln 130 135 140
Asp Lys Ala Ala Asn Lys Glu Leu Thr Phe Leu Leu Phe Ser Cys Pro 145
150 155 160 His Arg Leu Arg Glu His Leu Glu Arg Gly Arg Gly Asn Leu
Glu Trp 165 170 175 Lys Glu Pro Pro Ser Met Arg Leu Lys Ala Arg Pro
Ser Ser Pro Gly 180 185 190 Phe Ser Val Leu Thr Cys Ser Ala Phe Ser
Phe Tyr Pro Pro Glu Leu 195 200 205 Gln Leu Arg Phe Leu Arg Asn Gly
Leu Ala Ala Gly Thr Gly Gln Gly 210 215 220 Asp Phe Gly Pro Asn Ser
Asp Gly Ser Phe His Ala Ser Ser Ser Leu 225 230 235 240 Thr Val Lys
Ser Gly Asp Glu His His Tyr Cys Cys Ile Val Gln His 245 250 255 Ala
Gly Leu Ala Gln Pro Leu Arg Val Glu Leu Glu Ser Pro Ala Lys 260 265
270 Ser Ser 3421PRTArtificial SequenceHIS-AVITAG 34His His His His
His His Gly Leu Asn Asp Ile Phe Glu Ala Gln Lys 1 5 10 15 Ile Glu
Trp His Glu 20 3599PRTHomo sapiens 35Ile Gln Arg Thr Pro Lys Ile
Gln Val Tyr Ser Arg His Pro Ala Glu 1 5 10 15 Asn Gly Lys Ser Asn
Phe Leu Asn Cys Tyr Val Ser Gly Phe His Pro 20 25 30 Ser Asp Ile
Glu Val Asp Leu Leu Lys Asn Gly Glu Arg Ile Glu Lys 35 40 45 Val
Glu His Ser Asp Leu Ser Phe Ser Lys Asp Trp Ser Phe Tyr Leu 50 55
60 Leu Tyr Tyr Thr Glu Phe Thr Pro Thr Glu Lys Asp Glu Tyr Ala Cys
65 70 75 80 Arg Val Asn His Val Thr Leu Ser Gln Pro Lys Ile Val Lys
Trp Asp 85 90 95 Arg Asp Met 36450PRTArtificial Sequenceanti-HER2
antibody IgG1 HC 36Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu Val
Gln Pro Gly Gly 1 5 10 15 Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly
Phe Asn Ile Lys Asp Thr 20 25 30 Tyr Ile His Trp Val Arg Gln Ala
Pro Gly Lys Gly Leu Glu Trp Val 35 40 45 Ala Arg Ile Tyr Pro Thr
Asn Gly Tyr Thr Arg Tyr Ala Asp Ser Val 50 55 60 Lys Gly Arg Phe
Thr Ile Ser Ala Asp Thr Ser Lys Asn Thr Ala Tyr 65 70 75 80 Leu Gln
Met Asn Ser Leu Arg Ala Glu Asp Thr Ala Val Tyr Tyr Cys 85 90 95
Ser Arg Trp Gly Gly Asp Gly Phe Tyr Ala Met Asp Tyr Trp Gly Gln 100
105 110 Gly Thr Leu Val Thr Val Ser Ser Ala Ser Thr Lys Gly Pro Ser
Val 115 120 125 Phe Pro Leu Ala Pro Ser Ser Lys Ser Thr Ser Gly Gly
Thr Ala Ala 130 135 140 Leu Gly Cys Leu Val Lys Asp Tyr Phe Pro Glu
Pro Val Thr Val Ser 145 150 155 160 Trp Asn Ser Gly Ala Leu Thr Ser
Gly Val His Thr Phe Pro Ala Val 165 170 175 Leu Gln Ser Ser Gly Leu
Tyr Ser Leu Ser Ser Val Val Thr Val Pro 180 185 190 Ser Ser Ser Leu
Gly Thr Gln Thr Tyr Ile Cys Asn Val Asn His Lys 195 200 205 Pro Ser
Asn Thr Lys Val Asp Lys Lys Val Glu Pro Lys Ser Cys Asp 210 215 220
Lys Thr His Thr Cys Pro Pro Cys Pro Ala Pro Glu Leu Leu Gly Gly 225
230 235 240 Pro Ser Val Phe Leu Phe Pro Pro Lys Pro Lys Asp Thr Leu
Met Ile 245 250 255 Ser Arg Thr Pro Glu Val Thr Cys Val Val Val Asp
Val Ser His Glu 260 265 270 Asp Pro Glu Val Lys Phe Asn Trp Tyr Val
Asp Gly Val Glu Val His 275 280 285 Asn Ala Lys Thr Lys Pro Arg Glu
Glu Gln Tyr Asn Ser Thr Tyr Arg 290 295 300 Val Val Ser Val Leu Thr
Val Leu His Gln Asp Trp Leu Asn Gly Lys 305 310 315 320 Glu Tyr Lys
Cys Lys Val Ser Asn Lys Ala Leu Pro Ala Pro Ile Glu 325 330 335 Lys
Thr Ile Ser Lys Ala Lys Gly Gln Pro Arg Glu Pro Gln Val Tyr 340 345
350 Thr Leu Pro Pro Ser Arg Asp Glu Leu Thr Lys Asn Gln Val Ser Leu
355 360 365 Thr Cys Leu Val Lys Gly Phe Tyr Pro Ser Asp Ile Ala Val
Glu Trp 370 375 380 Glu Ser Asn Gly Gln Pro Glu Asn Asn Tyr Lys Thr
Thr Pro Pro Val 385 390 395 400 Leu Asp Ser Asp Gly Ser Phe Phe Leu
Tyr Ser Lys Leu Thr Val Asp 405 410 415 Lys Ser Arg Trp Gln Gln Gly
Asn Val Phe Ser Cys Ser Val Met His 420 425 430 Glu Ala Leu His Asn
His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Pro 435 440 445 Gly Lys 450
37214PRTArtificial Sequenceanti-HER2 antibody IgG1 LC 37Asp Ile Gln
Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser Val Gly 1 5 10 15 Asp
Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Asp Val Asn Thr Ala 20 25
30 Val Ala Trp Tyr Gln Gln Lys Pro Gly Lys Ala Pro Lys Leu Leu Ile
35 40 45 Tyr Ser Ala Ser Phe Leu Tyr Ser Gly Val Pro Ser Arg Phe
Ser Gly 50 55 60 Ser Arg Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser
Ser Leu Gln Pro 65 70 75 80 Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln
His Tyr Thr Thr Pro Pro 85 90 95 Thr Phe Gly Gln Gly Thr Lys Val
Glu Ile Lys Arg Thr Val Ala Ala 100 105 110 Pro Ser Val Phe Ile Phe
Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly 115 120 125 Thr Ala Ser Val
Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu Ala 130 135 140 Lys Val
Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly Asn Ser Gln 145 150 155
160 Glu Ser Val Thr Glu Gln Asp Ser Lys Asp Ser Thr Tyr Ser Leu Ser
165 170 175 Ser Thr Leu Thr Leu Ser Lys Ala Asp Tyr Glu Lys His Lys
Val Tyr 180 185 190 Ala Cys Glu Val Thr His Gln Gly Leu
Ser Ser Pro Val Thr Lys Ser 195 200 205 Phe Asn Arg Gly Glu Cys 210
38447PRTArtificial Sequenceanti-HER2 antibody IgG4 HC 38Glu Val Gln
Leu Val Glu Ser Gly Gly Gly Leu Val Gln Pro Gly Gly 1 5 10 15 Ser
Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Asn Ile Lys Asp Thr 20 25
30 Tyr Ile His Trp Val Arg Gln Ala Pro Gly Lys Gly Leu Glu Trp Val
35 40 45 Ala Arg Ile Tyr Pro Thr Asn Gly Tyr Thr Arg Tyr Ala Asp
Ser Val 50 55 60 Lys Gly Arg Phe Thr Ile Ser Ala Asp Thr Ser Lys
Asn Thr Ala Tyr 65 70 75 80 Leu Gln Met Asn Ser Leu Arg Ala Glu Asp
Thr Ala Val Tyr Tyr Cys 85 90 95 Ser Arg Trp Gly Gly Asp Gly Phe
Tyr Ala Met Asp Tyr Trp Gly Gln 100 105 110 Gly Thr Leu Val Thr Val
Ser Ser Ala Ser Thr Lys Gly Pro Ser Val 115 120 125 Phe Pro Leu Ala
Pro Cys Ser Arg Ser Thr Ser Glu Ser Thr Ala Ala 130 135 140 Leu Gly
Cys Leu Val Lys Asp Tyr Phe Pro Glu Pro Val Thr Val Ser 145 150 155
160 Trp Asn Ser Gly Ala Leu Thr Ser Gly Val His Thr Phe Pro Ala Val
165 170 175 Leu Gln Ser Ser Gly Leu Tyr Ser Leu Ser Ser Val Val Thr
Val Pro 180 185 190 Ser Ser Ser Leu Gly Thr Lys Thr Tyr Thr Cys Asn
Val Asp His Lys 195 200 205 Pro Ser Asn Thr Lys Val Asp Lys Arg Val
Glu Ser Lys Tyr Gly Pro 210 215 220 Pro Cys Pro Ser Cys Pro Ala Pro
Glu Phe Leu Gly Gly Pro Ser Val 225 230 235 240 Phe Leu Phe Pro Pro
Lys Pro Lys Asp Thr Leu Met Ile Ser Arg Thr 245 250 255 Pro Glu Val
Thr Cys Val Val Val Asp Val Ser Gln Glu Asp Pro Glu 260 265 270 Val
Gln Phe Asn Trp Tyr Val Asp Gly Val Glu Val His Asn Ala Lys 275 280
285 Thr Lys Pro Arg Glu Glu Gln Phe Asn Ser Thr Tyr Arg Val Val Ser
290 295 300 Val Leu Thr Val Leu His Gln Asp Trp Leu Asn Gly Lys Glu
Tyr Lys 305 310 315 320 Cys Lys Val Ser Asn Lys Gly Leu Pro Ser Ser
Ile Glu Lys Thr Ile 325 330 335 Ser Lys Ala Lys Gly Gln Pro Arg Glu
Pro Gln Val Tyr Thr Leu Pro 340 345 350 Pro Ser Gln Glu Glu Met Thr
Lys Asn Gln Val Ser Leu Thr Cys Leu 355 360 365 Val Lys Gly Phe Tyr
Pro Ser Asp Ile Ala Val Glu Trp Glu Ser Asn 370 375 380 Gly Gln Pro
Glu Asn Asn Tyr Lys Thr Thr Pro Pro Val Leu Asp Ser 385 390 395 400
Asp Gly Ser Phe Phe Leu Tyr Ser Arg Leu Thr Val Asp Lys Ser Arg 405
410 415 Trp Gln Glu Gly Asn Val Phe Ser Cys Ser Val Met His Glu Ala
Leu 420 425 430 His Asn His Tyr Thr Gln Lys Ser Leu Ser Leu Ser Leu
Gly Lys 435 440 445 39214PRTArtificial Sequenceanti-HER2 antibody
IgG4 LC 39Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu Ser Ala Ser
Val Gly 1 5 10 15 Asp Arg Val Thr Ile Thr Cys Arg Ala Ser Gln Asp
Val Asn Thr Ala 20 25 30 Val Ala Trp Tyr Gln Gln Lys Pro Gly Lys
Ala Pro Lys Leu Leu Ile 35 40 45 Tyr Ser Ala Ser Phe Leu Tyr Ser
Gly Val Pro Ser Arg Phe Ser Gly 50 55 60 Ser Arg Ser Gly Thr Asp
Phe Thr Leu Thr Ile Ser Ser Leu Gln Pro 65 70 75 80 Glu Asp Phe Ala
Thr Tyr Tyr Cys Gln Gln His Tyr Thr Thr Pro Pro 85 90 95 Thr Phe
Gly Gln Gly Thr Lys Val Glu Ile Lys Arg Thr Val Ala Ala 100 105 110
Pro Ser Val Phe Ile Phe Pro Pro Ser Asp Glu Gln Leu Lys Ser Gly 115
120 125 Thr Ala Ser Val Val Cys Leu Leu Asn Asn Phe Tyr Pro Arg Glu
Ala 130 135 140 Lys Val Gln Trp Lys Val Asp Asn Ala Leu Gln Ser Gly
Asn Ser Gln 145 150 155 160 Glu Ser Val Thr Glu Gln Asp Ser Lys Asp
Ser Thr Tyr Ser Leu Ser 165 170 175 Ser Thr Leu Thr Leu Ser Lys Ala
Asp Tyr Glu Lys His Lys Val Tyr 180 185 190 Ala Cys Glu Val Thr His
Gln Gly Leu Ser Ser Pro Val Thr Lys Ser 195 200 205 Phe Asn Arg Gly
Glu Cys 210 40115PRTArtificial SequenceAmino acid sequence of the
heavy chain variable region of briakinumab (CJ-695, ABT-874). 40Gln
Val Gln Leu Val Glu Ser Gly Gly Gly Val Val Gln Pro Gly Arg 1 5 10
15 Ser Leu Arg Leu Ser Cys Ala Ala Ser Gly Phe Thr Phe Ser Ser Tyr
20 25 30 Gly Met His Trp Val Arg Gln Ala Pro Gly Lys Gly Leu Glu
Trp Val 35 40 45 Ala Phe Ile Arg Tyr Asp Gly Ser Asn Lys Tyr Tyr
Ala Asp Ser Val 50 55 60 Lys Gly Arg Phe Thr Ile Ser Arg Asp Asn
Ser Lys Asn Thr Leu Tyr 65 70 75 80 Leu Gln Met Asn Ser Leu Arg Ala
Glu Asp Thr Ala Val Tyr Tyr Cys 85 90 95 Lys Thr His Gly Ser His
Asp Asn Trp Gly Gln Gly Thr Met Val Thr 100 105 110 Val Ser Ser 115
41112PRTArtificial SequenceAmino acid sequence of the light chain
variable region of briakinumab (J-695, ABT-874). 41Gln Ser Val Leu
Thr Gln Pro Pro Ser Val Ser Gly Ala Pro Gly Gln 1 5 10 15 Arg Val
Thr Ile Ser Cys Ser Gly Ser Arg Ser Asn Ile Gly Ser Asn 20 25 30
Thr Val Lys Trp Tyr Gln Gln Leu Pro Gly Thr Ala Pro Lys Leu Leu 35
40 45 Ile Tyr Tyr Asn Asp Gln Arg Pro Ser Gly Val Pro Asp Arg Phe
Ser 50 55 60 Gly Ser Lys Ser Gly Thr Ser Ala Ser Leu Ala Ile Thr
Gly Leu Gln 65 70 75 80 Ala Glu Asp Glu Ala Asp Tyr Tyr Cys Gln Ser
Tyr Asp Arg Tyr Thr 85 90 95 His Pro Ala Leu Leu Phe Gly Thr Gly
Thr Lys Val Thr Val Leu Gly 100 105 110 42119PRTArtificial
SequenceAmino acid sequence of the heavy chain variable region of
ustekinumab (CTNO-1275). 42Glu Val Gln Leu Val Gln Ser Gly Ala Glu
Val Lys Lys Pro Gly Glu 1 5 10 15 Ser Leu Lys Ile Ser Cys Lys Gly
Ser Gly Tyr Ser Phe Thr Thr Tyr 20 25 30 Trp Leu Gly Trp Val Arg
Gln Met Pro Gly Lys Gly Leu Asp Trp Ile 35 40 45 Gly Ile Met Ser
Pro Val Asp Ser Asp Ile Arg Tyr Ser Pro Ser Phe 50 55 60 Gln Gly
Gln Val Thr Met Ser Val Asp Lys Ser Ile Thr Thr Ala Tyr 65 70 75 80
Leu Gln Trp Asn Ser Leu Lys Ala Ser Asp Thr Ala Met Tyr Tyr Cys 85
90 95 Ala Arg Arg Arg Pro Gly Gln Gly Tyr Phe Asp Phe Trp Gly Gln
Gly 100 105 110 Thr Leu Val Thr Val Ser Ser 115 43107PRTArtificial
SequenceAmino acid sequence of the light chain variable region of
ustekinumab (CTNO-1275). 43Asp Ile Gln Met Thr Gln Ser Pro Ser Ser
Leu Ser Ala Ser Val Gly 1 5 10 15 Asp Arg Val Thr Ile Thr Cys Arg
Ala Ser Gln Gly Ile Ser Ser Trp 20 25 30 Leu Ala Trp Tyr Gln Gln
Lys Pro Glu Lys Ala Pro Lys Ser Leu Ile 35 40 45 Tyr Ala Ala Ser
Ser Leu Gln Ser Gly Val Pro Ser Arg Phe Ser Gly 50 55 60 Ser Gly
Ser Gly Thr Asp Phe Thr Leu Thr Ile Ser Ser Leu Gln Pro 65 70 75 80
Glu Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Tyr Asn Ile Tyr Pro Tyr 85
90 95 Thr Phe Gly Gln Gly Thr Lys Leu Glu Ile Lys 100 105
44123PRTArtificial SequenceBevacizumab heavy chain variable domain
(Drug Bank DB00112) 44Glu Val Gln Leu Val Glu Ser Gly Gly Gly Leu
Val Gln Pro Gly Gly 1 5 10 15 Ser Leu Arg Leu Ser Cys Ala Ala Ser
Gly Tyr Thr Phe Thr Asn Tyr 20 25 30 Gly Met Asn Trp Val Arg Gln
Ala Pro Gly Lys Gly Leu Glu Trp Val 35 40 45 Gly Trp Ile Asn Thr
Tyr Thr Gly Glu Pro Thr Tyr Ala Ala Asp Phe 50 55 60 Lys Arg Arg
Phe Thr Phe Ser Leu Asp Thr Ser Lys Ser Thr Ala Tyr 65 70 75 80 Leu
Gln Met Asn Ser Leu Arg Ala Glu Asp Thr Ala Val Tyr Tyr Cys 85 90
95 Ala Lys Tyr Pro His Tyr Tyr Gly Ser Ser His Trp Tyr Phe Asp Val
100 105 110 Trp Gly Gln Gly Thr Leu Val Thr Val Ser Ser 115 120
45104PRTArtificial SequenceBevacizumab light chain variable domain
(Drug Bank DB00112) 45Asp Ile Gln Met Thr Gln Ser Pro Ser Ser Leu
Ser Ala Ser Val Gly 1 5 10 15 Asp Arg Val Thr Ile Thr Cys Ser Ala
Ser Gln Asp Ile Ser Asn Tyr 20 25 30 Leu Asn Trp Tyr Gln Gln Lys
Pro Gly Lys Ala Pro Lys Val Leu Ile 35 40 45 Tyr Phe Thr Ser Ser
Leu His Ser Gly Val Pro Ser Arg Phe Ser Gly 50 55 60 Ser Gly Ser
Gly Thr Asp Phe Thr Leu Thr Ile Ser Ser Leu Gln Pro 65 70 75 80 Glu
Asp Phe Ala Thr Tyr Tyr Cys Gln Gln Tyr Ser Thr Val Pro Trp 85 90
95 Thr Phe Gly Gln Gly Thr Lys Val 100
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References