U.S. patent application number 11/987415 was filed with the patent office on 2011-11-17 for hepatic disease-evaluating apparatus, hepatic disease-evaluating method, hepatic disease-evaluating system, hepatic disease-evaluating program and recording medium.
This patent application is currently assigned to Ajinomoto Co., Inc.. Invention is credited to Yasushi Noguchi, Tetsuya Sugimoto, Mitsuo Takahashi, Qingwei Zhang.
Application Number | 20110282585 11/987415 |
Document ID | / |
Family ID | 37481442 |
Filed Date | 2011-11-17 |
United States Patent
Application |
20110282585 |
Kind Code |
A9 |
Zhang; Qingwei ; et
al. |
November 17, 2011 |
HEPATIC DISEASE-EVALUATING APPARATUS, HEPATIC DISEASE-EVALUATING
METHOD, HEPATIC DISEASE-EVALUATING SYSTEM, HEPATIC
DISEASE-EVALUATING PROGRAM AND RECORDING MEDIUM
Abstract
In a hepatic disease-evaluating apparatus, an indicator
calculating unit calculates an index indicating the degree of
hepatic fibrosis from amino acid concentration data to be evaluated
including amino acid concentration value, based on one or more
indices of fractional expression having amino acid concentration as
variable. A disease state evaluating unit evaluates the disease
state of the hepatic disease to be evaluated, based on the index
value.
Inventors: |
Zhang; Qingwei;
(Kawasaki-shi, JP) ; Takahashi; Mitsuo;
(Kawasaki-shi, JP) ; Sugimoto; Tetsuya;
(Kawasaki-shi, JP) ; Noguchi; Yasushi;
(Kawasaki-shi, JP) |
Assignee: |
Ajinomoto Co., Inc.
|
Prior
Publication: |
|
Document Identifier |
Publication Date |
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US 20080154515 A1 |
June 26, 2008 |
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Family ID: |
37481442 |
Appl. No.: |
11/987415 |
Filed: |
November 29, 2007 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/JP2006/310164 |
May 22, 2006 |
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11987415 |
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11148352 |
Jun 9, 2005 |
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PCT/JP2006/310164 |
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PCT/JP03/15713 |
Dec 9, 2003 |
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11148352 |
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Current U.S.
Class: |
702/19 |
Current CPC
Class: |
G01N 2800/085 20130101;
G01N 33/576 20130101; G01N 33/6812 20130101 |
Class at
Publication: |
702/19 |
International
Class: |
G01N 33/68 20060101
G01N033/68 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 9, 2002 |
JP |
2002-357042 |
Aug 1, 2003 |
JP |
2003-205589 |
May 30, 2005 |
JP |
2005-157802 |
Claims
1. A hepatic disease-evaluating apparatus, comprising: an index
calculating unit that calculates an index indicating the degree of
hepatic fibrosis from amino acid concentration data to be evaluated
including amino acid concentration value, based on one or more
indices of fractional expression having amino acid concentration as
variable; and a disease state evaluating unit that evaluates the
disease state of the hepatic disease to be evaluated, based on the
index calculated by the index calculating unit, wherein the index
has a numerator of the fractional expression including at least one
of Phe and Tyr and at least one of Thr, Met and Orn and a
denominator of the fractional expression including at least one of
Val, Leu and Ile and at least one of Pro and Gly, or the numerator
of the fractional expression including at least one of Val, Leu and
Ile and at least one of Pro and Gly and the denominator of the
fractional expression including at least one of Phe and Tyr and at
least one of Thr, Met and Orn.
2. The hepatic disease-evaluating apparatus according to claim 1,
wherein the index is the sum of two fractional expressions; the
numerator in one fractional expression is any one of Phe and Tyr
and the denominator in the one fractional expression is any one of
Val, Leu, and Ile; and the numerator in the other fractional
expression is the sum of at least one of Thr, Met and Orn and the
denominator of the other fractional expression is the sum of at
least one of Pro and Gly.
3. The hepatic disease-evaluating apparatus according to claim 2,
wherein the index is the sum of the two fractional expressions; the
numerator in the one fractional expression is Phe and the
denominator in the one fractional expression is Val; and the
numerator in the other fractional expression is the sum of Thr, Met
and Orn and the denominator of the other fractional expression is
the sum of Pro and Gly.
4. The hepatic disease-evaluating apparatus according to claim 1,
wherein the hepatic disease includes at least one of hepatitis,
chronic hepatitis, hepatic fibrosis and liver cirrhosis.
5. A hepatic disease-evaluating method, comprising: an index
calculating step of calculating an index indicating the degree of
hepatic fibrosis from amino acid concentration data to be evaluated
including amino acid concentration value, based on one or more
indices of fractional expression having amino acid concentration as
variable; and a disease state evaluating step of evaluating the
disease state of the hepatic disease to be evaluated, based on the
index calculated at the index calculating step, wherein the index
has a numerator of the fractional expression including at least one
of Phe and Tyr and at least one of Thr, Met and Orn and a
denominator of the fractional expression including at least one of
Val, Leu and Ile and at least one of Pro and Gly, or the numerator
of the fractional expression including at least one of Val, Leu and
Ile and at least one of Pro and Gly and the denominator of the
fractional expression including at least one of Phe and Tyr and at
least one of Thr, Met and Orn.
6. The hepatic disease-evaluating method according to claim 5,
wherein the index is the sum of two fractional expressions; the
numerator in one fractional expression is any one of Phe and Tyr
and the denominator in the one fractional expression is any one of
Val, Leu, and Ile; and the numerator in the other fractional
expression is the sum of at least one of Thr, Met and Orn and the
denominator of the other fractional expression is the sum of at
least one of Pro and Gly.
7. The hepatic disease-evaluating method according to claim 6,
wherein the index is the sum of the two fractional expressions; the
numerator in the one fractional expression is Phe and the
denominator in the one fractional expression is Val; and the
numerator in the other fractional expression is the sum of Thr, Met
and Orn and the denominator of the other fractional expression is
the sum of Pro and Gly.
8. The hepatic disease-evaluating method according to claim 5,
wherein the hepatic disease includes at least one of hepatitis,
chronic hepatitis, hepatic fibrosis and liver cirrhosis.
9. A hepatic disease-evaluating system, comprising a hepatic
disease-evaluating apparatus that evaluates hepatic disease and a
information communication terminal apparatus that provides amino
acid concentration data to be evaluated including amino acid
concentration value that are connected to each other
communicatively via a network, wherein the information
communication terminal apparatus comprising: a sending unit that
sends the amino acid concentration data to be evaluated to the
hepatic disease-evaluating apparatus; and a receiving unit that
receives the evaluation results of the disease state of the hepatic
disease to be evaluated sent from the hepatic disease-evaluating
apparatus, the hepatic disease-evaluating apparatus comprising: a
receiving unit that receives the amino acid concentration data to
be evaluated sent from the information communication terminal
apparatus; an index calculating unit that calculates an index
indicating the degree of hepatic fibrosis from the amino acid
concentration data to be evaluated received by the receiving unit,
based on one or more indices of fractional expression having amino
acid concentration as variable; a disease state evaluating unit
that evaluates the disease state of the hepatic disease to be
evaluated, based on the index calculated by the index calculating
unit; and a sending unit that sends the evaluation results obtained
by the disease state evaluating unit to the information
communication terminal apparatus, wherein the index has a numerator
of the fractional expression including at least one of Phe and Tyr
and at least one of Thr, Met and Orn and a denominator of the
fractional expression including at least one of Val, Leu and Ile
and at least one of Pro and Gly, or the numerator of the fractional
expression including at least one of Val, Leu and Ile and at least
one of Pro and Gly and the denominator of the fractional expression
including at least one of Phe and Tyr and at least one of Thr, Met
and Orn.
10. A hepatic disease-evaluating program making a computer execute
a hepatic disease-evaluating method, comprising: an index
calculating step of calculating an index indicating the degree of
hepatic fibrosis from amino acid concentration data to be evaluated
including amino acid concentration value, based on one or more
indices of fractional expression having amino acid concentration as
variable; and a disease state-evaluating step of evaluating the
disease state of the hepatic disease to be evaluated, based on the
index calculated at the index calculating step, wherein the index
has a numerator of the fractional expression including at least one
of Phe and Tyr and at least one of Thr, Met and Orn and a
denominator of the fractional expression including at least one of
Val, Leu and Ile and at least one of Pro and Gly, or the numerator
of the fractional expression including at least one of Val, Leu and
Ile and at least one of Pro and Gly and the denominator of the
fractional expression including at least one of Phe and Tyr and at
least one of Thr, Met and Orn.
11. A computer-readable recording medium, comprising the hepatic
disease-evaluating program according to claim 10.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a hepatic
disease-evaluating apparatus, a hepatic disease-evaluating method,
a hepatic disease-evaluating system, and a hepatic
disease-evaluating program and recording medium that calculate an
index indicating the degree of hepatic fibrosis from amino acid
concentration data to be evaluated based on an index formula and
evaluate the disease state of the hepatic disease to be evaluated
based on the index value.
[0003] 2. Description of the Related Art
[0004] Hepatic biopsy and laparoscopy have been used mainly for
diagnosis of the progress of hepatic fibrosis and also of liver
cirrhosis. The score by the METAVIR scoring method consisting of
five progressive stages (F0, F1, F2, F3, and F4) has been used as
the indicator of the progress of hepatic fibrosis. Here, the stage
F0 indicates that there is no hepatic fibrosis, and the stages F1,
F2, F3 and F4 indicate that there is the hepatic fibrosis. Hepatic
fibrosis starts in the stage F1, progresses gradually to the stages
F2 and F3, and reaches liver cirrhosis in the stage F4.
[0005] However, these traditional diagnostic methods are invasive,
giving the patient physical and mental burdens such as pain, and
thus are accompanied with risks such as bleeding during test.
[0006] For that reason, methods of diagnosing progress of hepatic
fibrosis and liver cirrhosis by using one blood component or a
combination of two or more blood components such as platelet,
globulin, AST (aspartate aminotransferase), ALT (alanine
aminotransferase), albumin, and hyaluronic acid as an index have
been proposed recently as the non-invasive diagnostic methods (see
U.S. patent application Ser. No. 09/687,459 and "Luo J. C., Hwang
S. J., Chang F. Y., Chu C. W., Lai C. R., Wang Y. J., Lee P. C.,
Tsay S. H., and Lee S. D., "Simple blood tests can predict
compensated liver cirrhosis in patients with chronic hepatitis C",
Hepatogastroenterology, 49, 478, 2002", "Pohl A., Behling C.,
Oliver D., Kilani M., Monson P., and Hassanein T., "Serum
aminotransferase levels and platelet counts as predictors of degree
of fibrosis in chronic hepatitis C virus infection", Am. J.
Gastroenterol, 96, 3142, 2001", and "Wai C. T., Greenson J. K.,
Fontana R. J., Kalbfleisch J. D., Marrero J. A., Conjeevaram H. S.,
and Lok A. S., "A simple noninvasive index can predict both
significant fibrosis and cirrhosis in patients with chronic
hepatitis C", Hepatology, 38, 518, 2003").
[0007] In addition, the Fischer ratio "(Leu+Val+Ile)+(Phe+Tyr)"
based on blood amino acid concentration (see "J. E. Fischer, J. M.
Funovics, A. Aguirre, J. H. James, J. M. Keane, R. I. Wesdorp, N.
Yoshimura, and T. Westman, "The role of plasma amino acids in
hepatic encephalopathy", Surgery, 78, 276-290, 1975") or the BTR
(branched-chain amino acids and tyrosine ratio) ratio, which is a
simplified Fischer ratio, "(Leu+Val+Ile)/Tyr" is used for diagnosis
of hepatic encephalopathy in the patient with liver cirrhosis, as
an index for use in clinical diagnosis of hepatic disease.
[0008] In addition, the index employed in the hepatic fibrosis
analyzer described in WO 2004/052,191 is also used for evaluation
of hepatitis, and it is possible to determine whether a patient is
with hepatitis or not from blood amino acid concentration by using
the index.
[0009] Clinically, there is a need for an index aimed at
determining whether treatment with interferon/ribavirin combination
(intervention with the treatment) is needed to a patient with a
hepatic disease. In particular, there is a need for an index for
determining whether the hepatic fibrosis of a patient is in the
stage of F0, F1, or F2 or in the stage of F3 or F4 and an index for
determining whether the hepatic fibrosis of a patient is in the
stage of F0, F1, F2, or F3 or in the stage of F4.
[0010] However because the conventional methods did not always
permit accurate evaluation of the progress of the disease state of
hepatic diseases, it was not always possible to determine whether
treatment is needed after test, depending on the disease state to
be diagnosed. For example, there is currently no non-invasive index
that can determine whether treatment with interferon/ribavirin
combination is needed to the patients with a hepatic disease with
sufficiently high accuracy, and thus, it was not possible to
determine whether the treatment is needed to the patient with
sufficiently high accuracy with conventional indices.
SUMMARY OF THE INVENTION
[0011] It is an object of the present invention to at least
partially solve the problems in the conventional technology.
[0012] For example, an object of the present invention, which was
made to solve the problems above, is to provide a hepatic
disease-evaluating apparatus, a hepatic disease-evaluating method,
a hepatic disease-evaluating system, and a hepatic
disease-evaluating program and a recording medium carrying the same
that allow accurate evaluation of the progress of the disease state
of hepatic disease and accurate determination, for example, of
whether treatment with interferon/ribavirin combination is needed
to patients with a hepatic disease.
[0013] To solve the above problems and achieve the above objects, a
hepatic disease-evaluating apparatus, a hepatic disease-evaluating
method, and a hepatic disease-evaluating program which making a
computer execute a hepatic disease-evaluating method according to
one aspect of the present invention, include an index calculating
unit (index calculating step) that calculates (of calculating) an
index indicating the degree of hepatic fibrosis from the amino acid
concentration data to be evaluated including amino acid
concentration value, based on one or more indices of fractional
expression having amino acid concentration as variable, and a
disease state evaluating unit (disease state evaluating step) that
evaluates (of evaluating) the disease state of the hepatic disease
to be evaluated, based on the index calculated by (at) the index
calculating unit (index calculating step), wherein the index has a
numerator of the fractional expression including at least one of
Phe and Tyr and at least one of Thr, Met and Orn and a denominator
of the fractional expression including at least one of Val, Leu and
Ile and at least one of Pro and Gly, or the numerator of the
fractional expression including at least one of Val, Leu and Ile
and at least one of Pro and Gly and the denominator of the
fractional expression including at least one of Phe and Tyr and at
least one of Thr, Met and Orn.
[0014] Another aspect of the present invention is the hepatic
disease-evaluating apparatus, the hepatic disease-evaluating
method, and the hepatic disease-evaluating program, wherein the
index is the sum of two fractional expressions; the numerator in
one fractional expression is any one of Phe and Tyr and the
denominator in the one fractional expression is any one of Val,
Leu, and Ile; and the numerator in the other fractional expression
is the sum of at least one of Thr, Met and Orn and the denominator
of the other fractional expression is the sum of at least one of
Pro and Gly.
[0015] Still another aspect of the present invention is the hepatic
disease-evaluating apparatus, the hepatic disease-evaluating
method, and the hepatic disease-evaluating program, wherein the
index is the sum of the two fractional expressions; the numerator
in the one fractional expression is Phe and the denominator in the
one fractional expression is Val; and the numerator in the other
fractional expression is the sum of Thr, Met and Orn and the
denominator of the other fractional expression is the sum of Pro
and Gly.
[0016] Still another aspect of the present invention is the hepatic
disease-evaluating apparatus, the hepatic disease-evaluating
method, and the hepatic disease-evaluating program, wherein the
hepatic disease includes at least one of hepatitis, chronic
hepatitis, hepatic fibrosis and liver cirrhosis.
[0017] The present invention also relates to a hepatic
disease-evaluating system, and the hepatic disease-evaluating
system according to one aspect of the present invention includes a
hepatic disease-evaluating apparatus that evaluates hepatic disease
and a information communication terminal apparatus that provides
the amino acid concentration data to be evaluated including amino
acid concentration value that are connected to each other
communicatively via a network, wherein the information
communication terminal apparatus includes a sending unit that sends
the amino acid concentration data to be evaluated to the hepatic
disease-evaluating apparatus and a receiving unit that receives the
evaluation results of the disease state of the hepatic disease to
be evaluated sent from the hepatic disease-evaluating apparatus,
the hepatic disease-evaluating apparatus includes a receiving unit
that receives the amino acid concentration data to be evaluated
sent from the information communication terminal apparatus, an
index calculating unit that calculates an index indicating the
degree of hepatic fibrosis from the amino acid concentration data
to be evaluated received by the receiving unit, based on one or
more indices of fractional expression having amino acid
concentration as variable, a disease state evaluating unit that
evaluates the disease state of the hepatic disease to be evaluated,
based on the index calculated by the index calculating unit, and a
sending unit that sends the evaluation results obtained by the
disease state evaluating unit to the information communication
terminal apparatus, wherein the index has a numerator of the
fractional expression including at least one of Phe and Tyr and at
least one of Thr, Met and Orn and a denominator of the fractional
expression including at least one of Val, Leu and Ile and at least
one of Pro and Gly, or the numerator of the fractional expression
including at least one of Val, Leu and Ile and at least one of Pro
and Gly and the denominator of the fractional expression including
at least one of Phe and Tyr and at least one of Thr, Met and
Orn.
[0018] Another aspect of the present invention is the hepatic
disease-evaluating system, wherein the index is the sum of two
fractional expressions; the numerator in one fractional expression
is any one of Phe and Tyr and the denominator in the one fractional
expression is any one of Val, Leu, and Ile; and the numerator in
the other fractional expression is the sum of at least one of Thr,
Met and Orn and the denominator of the other fractional expression
is the sum of at least one of Pro and Gly.
[0019] Still another aspect of the present invention is the hepatic
disease-evaluating system, wherein the index is the sum of the two
fractional expressions; the numerator in the one fractional
expression is Phe and the denominator in the one fractional
expression is Val; and the numerator in the other fractional
expression is the sum of Thr, Met and Orn and the denominator of
the other fractional expression is the sum of Pro and Gly.
[0020] Still another aspect of the present invention is the hepatic
disease-evaluating system, wherein the hepatic disease includes at
least one of hepatitis, chronic hepatitis, hepatic fibrosis and
liver cirrhosis.
[0021] The present invention also relates to a recording medium,
and the recording medium according to one aspect of the present
invention includes the hepatic disease-evaluating program described
above.
[0022] The hepatic disease-evaluating apparatus, the hepatic
disease-evaluating method and the hepatic disease-evaluating
program according to the present invention, calculate the index
indicating the degree of hepatic fibrosis from the amino acid
concentration data to be evaluated including the value of amino
acid (specifically, blood amino acid) concentration, based on one
or more indices (one index or combination of plurality of indices)
of fractional expression having amino acid concentration as
variable, and evaluate the disease state of the hepatic disease to
be evaluated based on the index value. The index formula used in
calculation of the index has the numerator of the fractional
expression including at least one of Phe and Tyr and at least one
of Thr, Met and Orn and the denominator of the fractional
expression including at least one of Val, Leu and Ile and at least
one of Pro and Gly, or the numerator of the fractional expression
including at least one of Val, Leu and Ile and at least one of Pro
and Gly and the denominator of the fractional expression including
at least one of Phe and Tyr and at least one of Thr, Met and Orn.
In particular according to the present invention, it is possible to
evaluate progress of the disease state of hepatic disease
accurately and to determine, for example, whether treatment with
interferon/ribavirin combination is needed to patients with a
hepatic disease accurately. Specifically, it is possible to
determine whether the hepatic fibrosis of a patient is in the stage
of F0, F1, or F2 or in the stage of F3 or F4 accurately.
Specifically, it is also possible to determine whether the hepatic
fibrosis of a patient is in the stage of F0, F1, F2 or F3 or in the
stage of F4 accurately.
[0023] In the hepatic disease-evaluating apparatus, the hepatic
disease-evaluating method and the hepatic disease-evaluating
program according to the present invention, the index is the sum of
the two fractional expressions; the numerator in the one fractional
expression is any one of Phe and Tyr and the denominator in the one
fractional expression is any one of Val, Leu, and Ile; and the
numerator in the other fractional expression is the sum of at least
one of Thr, Met and Orn and the denominator of the other fractional
expression is the sum of at least one of Pro and Gly. In particular
according to the present invention, it is possible to evaluate
progress of the disease state of hepatic disease more accurately
and to determine, for example, whether treatment with
interferon/ribavirin combination is needed to patients with a
hepatic disease more accurately. Specifically, it is possible to
determine whether the hepatic fibrosis of a patient is in the stage
of F0, F1, or F2 or in the stage of F3 or F4 more accurately.
Specifically, it is also possible to determine whether the hepatic
fibrosis of a patient is in the stage of F0, F1, F2 or F3 or in the
stage of F4 more accurately.
[0024] In the hepatic disease-evaluating apparatus, the hepatic
disease-evaluating method and the hepatic disease-evaluating
program according to the present invention, the index is the sum of
the two fractional expressions; the numerator in the one fractional
expression is Phe and the denominator in the one fractional
expression is Val; and the numerator in the other fractional
expression is the sum of Thr, Met and Orn and the denominator of
the other fractional expression is the sum of Pro and Gly. In
particular according to the present invention, it is possible to
evaluate progress of the disease state of hepatic disease more
accurately and to determine, for example, whether treatment with
interferon/ribavirin combination is needed to patients with a
hepatic disease more accurately. Specifically, it is possible to
determine whether the hepatic fibrosis of a patient is in the stage
of F0, F1, or F2 or in the stage of F3 or F4 more accurately.
Specifically, it is also possible to determine whether the hepatic
fibrosis of a patient is in the stage of F0, F1, F2 or F3 or in the
stage of F4 more accurately.
[0025] In the hepatic disease-evaluating apparatus, the hepatic
disease-evaluating method and the hepatic disease-evaluating
program according to the present invention, the hepatic disease
includes at least one of hepatitis, chronic hepatitis, hepatic
fibrosis and liver cirrhosis, and thus, it, is possible to apply
the present invention appropriately for clinically, frequently
required evaluation of the disease state of at least one of
diseases such as hepatitis, chronic hepatitis, hepatic fibrosis and
liver cirrhosis.
[0026] In the hepatic disease-evaluating system according to the
present invention, the information communication terminal apparatus
sends the amino acid concentration data to be evaluated including
the value concerning amino acid (specifically, blood amino acid)
concentration to the hepatic disease-evaluating apparatus and
receives the transmitted evaluation results concerning the disease
state of the hepatic disease to be evaluated from the hepatic
disease-evaluating apparatus; and the hepatic disease-evaluating
apparatus receives the transmitted amino acid concentration data to
be evaluated from the information communication terminal apparatus,
calculates the index indicating the degree of the hepatic fibrosis
from the received amino acid concentration data to be evaluated,
based on one or more indices (one index or combination of plurality
of indices) of fractional expression having amino acid
concentration as variable, evaluates the disease state of the
hepatic disease to be evaluated, based on the index value, and
sends the evaluated evaluation results to the information
communication terminal apparatus. The index used in the calculation
of the index has the numerator of the fractional expression
including at least one of Phe and Tyr and at least one of Thr, Met
and Orn and the denominator of the fractional expression including
at least one of Val, Leu and Ile and at least one of Pro and Gly,
or the numerator of the fractional expression including at least
one of Val, Leu and Ile and at least one of Pro and Gly and the
denominator of the fractional expression including at least one of
Phe and Try and at least one of Thr, Met and Orn. In particular
according to the present invention, it is possible to evaluate
progress of the disease state of hepatic disease accurately and to
determine, for example, whether treatment with interferon/ribavirin
combination is needed to patients with a hepatic disease
accurately. Specifically, it is possible to determine whether the
hepatic fibrosis of a patient is in the stage of F0, F1, or F2 or
in the stage of F3 or F4 accurately. Specifically, it is also
possible to determine whether the hepatic fibrosis of a patient is
in the stage of F0, F1, F2 or F3 or in the stage of F4
accurately.
[0027] In the hepatic disease-evaluating system according to the
present invention, the index is the sum of the two fractional
expressions; the numerator in the one fractional expression is any
one of Phe and Tyr and the denominator in the one fractional
expression is any one of Val, Leu, and Ile; and the numerator in
the other fractional expression is the sum of at least one of Thr,
Met and Orn and the denominator of the other fractional expression
is the sum of at least one of Pro and Gly. It is thus possible to
evaluate progress of the disease state of hepatic disease more
accurately and to determine, for example, whether treatment with
interferon/ribavirin combination is needed to patients with a
hepatic disease more accurately. Specifically, it is possible to
determine whether the hepatic fibrosis of a patient is in the stage
of F0, F1, or F2 or in the stage of F3 or F4 more accurately.
Specifically, it is also possible to determine whether the hepatic
fibrosis of a patient is in the stage of F0, F1, F2 or F3 or in the
stage of F4 more accurately.
[0028] In the hepatic disease-evaluating system according to the
present invention, the index is the sum of the two fractional
expressions; the numerator in the one fractional expression is Phe
and the denominator in the one fractional expression is Val; and
the numerator in the other fractional expression is the sum of Thr,
Met and Orn and the denominator of the other fractional expression
is the sum of Pro and Gly. It is thus possible to evaluate progress
of the disease state of hepatic disease more accurately and to
determine, for example, whether treatment with interferon/ribavirin
n combination is needed to patients with a hepatic disease more
accurately. Specifically, it is possible to determine whether the
hepatic fibrosis of a patient is in the stage of F0, F1, or F2 or
in the stage of F3 or F4 more accurately. Specifically, it is also
possible to determine whether the hepatic fibrosis of a patient is
in the stage of F0, F1, F2 or F3 or in the stage of F4 more
accurately.
[0029] In the hepatic disease-evaluating system according to the
present invention, the hepatic disease includes at least one of
hepatitis, chronic hepatitis, hepatic fibrosis and liver cirrhosis,
and thus, it is possible to apply the present invention
appropriately for clinically, frequently required evaluation of the
disease state of at least one of diseases such as hepatitis,
chronic hepatitis, hepatic fibrosis and liver cirrhosis.
[0030] In the recording medium according to the present invention,
by making a computer read and execute the hepatic
disease-evaluating program recorded on the recording medium and
making the computer perform the hepatic disease-evaluating program,
it is possible to obtain advantageous effects similar to those
obtained by the hepatic disease-evaluating program.
[0031] The above and other objects, features, advantages and
technical and industrial significance of this invention will be
better understood by reading the following detailed description of
presently preferred embodiments of the invention, when considered
in connection with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0032] FIG. 1 is a principle configurational diagram showing the
basic principle of the present invention;
[0033] FIG. 2 is a diagram showing an example of the entire
configuration of the present system;
[0034] FIG. 3 is diagram showing another example of the entire
configuration of the present system;
[0035] FIG. 4 is a block diagram showing an example of the
configuration of the hepatic disease-evaluating apparatus 100 in
the present system;
[0036] FIG. 5 is a chart showing an example of the information
stored in the user information file 106a;
[0037] FIG. 6 is a chart showing an example of the information
stored in the amino acid concentration data file 106b;
[0038] FIG. 7 is a chart showing an example of the information
stored in the index database 106c;
[0039] FIG. 8 is a chart showing an example of the information
stored in the index file 106d;
[0040] FIG. 9 is a chart showing an example of the information
stored in the evaluation result file 106e;
[0041] FIG. 10 is a block diagram showing an example of the
configuration of the client apparatus 200 in the present
system;
[0042] FIG. 11 is a block diagram showing an example of the
configuration of the database apparatus 400 in the present
system;
[0043] FIG. 12 is a flowchart showing an example of the hepatic
disease evaluation service processing performed in the present
system;
[0044] FIG. 13 is a flowchart showing an example of the hepatic
disease evaluation processing performed in the hepatic
disease-evaluating apparatus 100;
[0045] FIG. 14 is a graph showing the ROC (Receiver Operating
Characteristic) curve for evaluation of the diagnostic performance
of index 1 in discrimination of two groups "F0, F1, F2, or F3" and
"F4";
[0046] FIG. 15 is a graph showing the ROC curve for evaluation of
the diagnostic performance of index 1 in discrimination of two
groups "F0, F1, or F2" and "F3 or F4";
[0047] FIG. 16 is a chart showing the sensitivity, specificity,
positive predictive value, and negative predictive value
corresponding to each cutoff value in discrimination of two groups
"F0, F1, or F2" and "F3 or F4", or two groups "F0, F1, F2, or F3"
and "F4", by using the index 1;
[0048] FIG. 17 is a chart showing the sensitivity and the
specificity corresponding to the optimal cutoff value in
discrimination of two groups "F0, F1, or F2" and "F3 or F4", or two
groups "F0, F1, F2, or F3" and "F4", by using an index almost
similar in diagnostic performance (discrimination efficiency) to
the index 1;
[0049] FIG. 18 is a chart showing the sensitivity and the
specificity corresponding to the optimal cutoff value in
discrimination of two groups "F0, F1, or F2" and "F3 or F4", or two
groups "F0, F1, F2, or F3" and "F4", by using an index almost
similar in diagnostic performance (discrimination efficiency) to
the index 1;
[0050] FIG. 19 is a chart showing the sensitivity and the
specificity corresponding to the optimal cutoff value in
discrimination of two groups "F0, F1, or F2" and "F3 or F4", or two
groups "F0, F1, F2, or F3" and "F4", by using an index almost
similar in diagnostic performance (discrimination efficiency) to
the index 1; and
[0051] FIG. 20 is a chart showing the sensitivity and the
specificity corresponding to the optimal cutoff value in
discrimination of two groups "F0, F1, or F2" and "F3 or F4", or two
groups "F0, F1, F2, or F3" and "F4", by using an index almost
similar in diagnostic performance (discrimination efficiency) to
the index 1.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0052] Hereinafter, embodiments of the hepatic disease-evaluating
apparatus, the hepatic disease-evaluating method, the hepatic
disease-evaluating system, the hepatic disease-evaluating program
and the recording medium according to the present invention will be
described in detail with reference to drawings. However, the
present invention is not limited to these embodiments.
[0053] [1. Summary of the Present Invention]
[0054] The summary of the present invention will be described with
reference to FIG. 1. FIG. 1 is a principle configurational diagram
showing the basic principle of the present invention.
[0055] First, an index of the degree of hepatic fibrosis is
calculated from previously obtained amino acid concentration data
to be evaluated including amino acid concentration values, based on
one or more indices (one index or combination of plurality of
indices) (step S-1). In other words, the index is obtained by
assigning the amino acid concentration values, based on the one or
more indices. Data such as defective values and outliers may be
removed from the amino acid concentration data before calculation
of the index (data filtering or data editing).
[0056] The index used in step S-1 has a numerator of its fractional
expressions including at least one of Phe and Tyr and at least one
of Thr, Met and Orn and a denominator of the fractional expressions
including at least one of Val, Leu and Ile and at least one of Pro
and Gly, or the numerator of the fractional expressions including
at least one of Val, Leu and Ile and at least one of Pro and Gly
and the denominator of the fractional expressions including at
least one of Phe and Tyr and at least one of Thr, Met and Orn. The
index used in step S-1 is a index newly generated by taking
clinical need into consideration, and aimed, in particular, at
discriminating two groups "F0, F1, or F2" and "F3 or F4" or two
groups "F0, F1, F2, or F3" and "F4" in the progressive stages of
hepatic fibrosis.
[0057] The index used in step S-1 may be specifically the sum of
two fractional expressions; the numerator in one fractional
expression is any one of Phe and Tyr and the denominator in the one
fractional expression is any one of Val, Leu, and Ile; and the
numerator in the other fractional expression is the sum of at least
one of Thr, Met and Orn, and the denominator of the other
fractional expression is the sum of at least one of Pro and Gly.
The index used in step S-1 in particular, may be the sum of the two
fractional expressions, and the numerator in the one fractional
expression may be Phe; the denominator in the one fractional
expression, Val; the numerator in the other fractional expression,
the sum of Thr, Met and Orn; and the denominator of the other
fractional expression, the sum of Pro and Gly.
[0058] An amino acid having smaller influence on the sum of Phe and
Tyr, the sum of Thr, Met, and Orn, the sum of Val, Leu, and Ile, or
the sum of Pro and Gly may be added as the variable in the index
used in step S-1. The phrase "having smaller influence" means that
addition of the amino acid does not deteriorate the determination
(discrimination) efficiency of the index.
[0059] The index used in step S-1 is obtained by the method
described in International Publication WO 2004/052,191 filed by the
present applicant. Hereinafter, the method will be described
briefly. First obtained are fractional expressions optimizing
discrimination of a target disease, by using a calculation method
of optimizing the correlation of the targeted variable to be
examined with the fractional expression having amino acid
concentration as the variable. The fractional expression includes a
divided fractional expression. Among the fractional expressions
optimizing discrimination of the target disease, a fractional
expression higher in diagnostic performance is selected as the
diagnosis index.
[0060] Subsequently, the disease state of the hepatic disease to be
evaluated is evaluated (predicted), based on the index calculated
in step S-1 (step S-2). In other words, the disease state of the
hepatic disease to be evaluated is evaluated (predicted) according
to the index. Here in step S-2, it may be determined
(discriminated) whether the disease state of the hepatic disease to
be evaluated is in the progressive stage of hepatic fibrosis of F0,
F1, or F2, or alternatively of F3 or F4, by comparing the index
calculated in step S-1 with a previously set particular threshold
value (cutoff value). It may also be determined (discriminated)
whether the disease state of the hepatic disease to be evaluated is
in the progressive stage of hepatic fibrosis of F0, F1, F2, or F3,
or alternatively of F4, by comparing the index calculated in step
S-1 with a previously set particular threshold value (cutoff
value).
[0061] In the present invention, the hepatic diseases include at
least one of hepatitis, chronic hepatitis, hepatic fibrosis and
liver cirrhosis. The hepatitis is a hepatic disease causing hepatic
dysfunction by hepatic inflammation, for example, due to infection
of hepatitis virus (e.g., A, B, C, or D), excessive intake of
alcohol, progress of fatty liver, or intake of medicine causing
hepatopathy. Hepatitis includes that the hepatic inflammation is
accompanied with diffuse or macular necrosis extending to the lobe.
Hepatitis is induced by infection of hepatitis C virus at highest
rate. Hepatitis advances gradually to chronic hepatitis.
Alternatively, hepatic fibrosis is a biological reaction in
response to the necrosis or damage of hepatic cell, and represents
a state in which connective tissues are accumulated in the liver
because of the unbalance between generation and decomposition of
extracellular matrix. Hepatic fibrosis progresses further by
decomposition of existing fiber and subsequent accumulation. Liver
cirrhosis is a stage of advanced chronic hepatitis. In the liver of
liver cirrhosis, there is observed, as pathologic change, diffuse
structural decay of hepatic structure caused by regenerative
nodules surrounded by fiber structure. Liver cirrhosis normally
progresses irreversibly. Hereinafter, progress of hepatitis will be
described, by taking hepatitis C virus (HCV) infection as an
example. Hepatitis C is induced by infection of hepatitis C virus,
specifically by infection of hepatitis C virus via body fluid.
Hepatitis C becomes chronic at a high frequency (50% or more) and
results in liver cirrhosis and consequently in hepatic cell cancer
approximately 20 years after development of the symptom. Infection
of hepatitis C virus results in constitutional malaise, and then
causes symptoms such as anorexia, nausea, and vomiting. Infection
of hepatitis C virus may also result in jaundice after these
symptoms. Swelling of liver is occasionally observed as an
objective symptom other than jaundice.
[0062] [2. System Configuration]
[0063] Hereinafter, the configuration of the hepatic
disease-evaluating system according to the present invention
(hereinafter, referred to as the present system) will be described
with reference to FIGS. 2 to 11. First, the entire configuration of
the present system will be described with reference to FIGS. 2 and
3.
[0064] FIG. 2 is a diagram showing an example of the entire
configuration of the present system. FIG. 3 is a diagram showing
another example of the entire configuration of the present
system.
[0065] As shown in FIG. 2, the present system includes a hepatic
disease-evaluating apparatus 100 which evaluates hepatic disease
and client apparatuses 200 as information communication terminal
apparatuses which provide the amino acid concentration data to be
evaluated that are communicatively connected to each other via a
network 300. As shown in FIG. 3, in addition to the hepatic
disease-evaluating apparatus 100 and the client apparatus 200, the
present system may have a database apparatus 400 storing, for
example, the amino acid concentration data transmitted from the
client apparatuses 200, the index used in the hepatic
disease-evaluating apparatus 100, and the evaluation results
transmitted from the hepatic disease-evaluating apparatus 100 that
is communicatively connected via the network 300. In this
configuration, the evaluation results and others are provided via
the network 300 from the hepatic disease-evaluating apparatus 100
to the client apparatuses 200 and the database apparatus 400, and
the amino acid concentration data, index, and others are provided
from the client apparatuses 200 and the database apparatus 400 to
the hepatic disease-evaluating apparatus 100.
[0066] [2-1. System Configuration of Hepatic Disease-Evaluating
Apparatus 100]
[0067] FIG. 4 is a block diagram showing an example of the
configuration of the hepatic disease-evaluating apparatus 100 in
the present system, showing conceptually only the region relevant
to the present invention.
[0068] The hepatic disease-evaluating apparatus 100 includes a
controlling device 102, such as CPU (Central Processing Unit),
which integrally controls the hepatic disease-evaluating apparatus
100, a communication interface 104 which connects the hepatic
disease-evaluating apparatus 100 to the network 300 communicatively
via communication apparatuses such as router and a wired or
wireless communication line such as private line, a memory device
106 storing various databases, tables, files and others, and an
input/output interface 108 connected to an input device 112 and an
output device 114, that are connected to each other communicatively
via any communication channel. The hepatic disease-evaluating
apparatus 100 may be present together with various analyzers (e.g.,
amino acid analyzer, etc.) in the same housing. Typical
configuration of disintegration/integration of the hepatic
disease-evaluating apparatus 100 is not limited to that shown in
the figure, and all or part of it may be disintegrated or
integrated functionally or physically in any unit, for example,
according to various loads applied. For example, part of the
processing may be performed via a CGI (Common Gateway
Interface).
[0069] The memory device 106 is a storage means, and examples
thereof include memory apparatuses such as RAM (Random Access
Memory) and ROM (Read Only Memory), fixed disk drives such as hard
disk, flexible disk, optical disk, and the like. The memory device
106 stores computer programs giving instructions to CPU for various
processing, together with OS (Operating System). As shown in the
figure, the memory device 106 stores a user information file 106a,
an amino acid concentration data file 106b, an index database 106c,
an index file 106d, and an evaluation result file 106e.
[0070] The user information file 106a stores information about
users (user information). FIG. 5 is a chart showing an example of
the information stored in the user information file 106a. As shown
in FIG. 5, the information stored in the user information file 106a
includes user ID (identification) for identifying the user
uniquely, user password for authentication of the user, user name,
organization ID uniquely identifying the organization of the user,
department ID for uniquely identifying the department of the user
organization, department name, and electronic mail address of the
user that are correlated to each other.
[0071] Back in FIG. 4, the amino acid concentration data file 106b
stores amino acid concentration data including amino acid
concentration values. FIG. 6 is a chart showing an example of the
information stored in the amino acid concentration data file 106b.
As shown in FIG. 6, the information stored in the amino acid
concentration data file 106b includes individual (sample) number
and amino acid concentration data that are correlated to each
other. In FIG. 6, the amino acid concentration data are assumed to
be numerical values, i.e., on continuous scale, but the amino acid
concentration data may be expressed on nominal scale or ordinal
scale. In the case of nominal or ordinal scale, any number may be
allocated to each state for analysis. The amino acid concentration
data may be used in combination with other biological information
(e.g., sex difference, age, smoking, digitalized electrocardiogram
waveform, enzyme concentration, and gene expression quantity).
[0072] Back in FIG. 4, the index database 106c stores the indices
used in the index-calculating part 102g described below. FIG. 7 is
a chart showing an example of the information stored in the index
database 106c. As shown in FIG. 7, the information stored in the
index database 106c includes index number identifying each index
uniquely and index of fractional expressions having amino acid
concentrations as variables, that are correlated to each other.
[0073] Back in FIG. 4, the index file 106d stores the index
indicating the degree of hepatic fibrosis calculated in the
index-calculating part 102g described below. FIG. 8 is a chart
showing an example of the information stored in the index file
106d. As shown in FIG. 8, the information stored in the index file
106d includes subject (sample) number of each subject to be
evaluated, index number, and index value that are correlated to
each other.
[0074] Back in FIG. 4, the evaluation result file 106e stores the
evaluation results obtained in the disease state-evaluating part
102h described below. FIG. 9 is a chart showing an example of the
information stored in the evaluation result file 106e. The
information stored in the evaluation result file 106e includes
subject (sample) number of each subject to be evaluated, index
value, and evaluation result (determination result, prediction
result) that are correlated to each other.
[0075] Back in FIG. 4, in addition, the memory device 106 stores
various Web data, CGI programs, and others for providing the client
apparatuses 200 with web site information. The Web data include
various data for displaying the Web page described below and
others, and the data are generated as, for example, a HTML
(HyperText Markup Language) or XML (Extensible Markup Language)
text file. Other temporary files such as files for the components
for generation of Web data and for operation, and others are also
stored in the memory device 106. In addition, it may store as
needed sound files in the WAVE or AIFF (Audio Interchange File
Format) Format for transmission to the client apparatuses 200 and
image files of still image or motion picture in the JPEG (Joint
Photographic Experts Group) or MPEG2 (Moving Picture Experts Group
phase 2) format.
[0076] The communication interface 104 allows communication between
the hepatic disease-evaluating apparatus 100 and the network 300
(or communication apparatus such as router). Thus, the
communication interface 104 has a function to communicate data via
a communication line with other terminals.
[0077] The input/output interface 108 is connected to the input
device 112 and the output device 114. A monitor (including home
television), a speaker, or a printer may be used as the output
device 114 (hereinafter, a monitor may be described as the output
device 114). A keyboard, a mouse, a microphone, or a monitor
functioning as a pointing device together with a mouse may be used
as the input device 112.
[0078] The controlling device 102 has an internal memory storing
control programs such as OS (Operating System), programs for
various processing procedures, and other needed data, and performs
information processing for execution of various processings
according to these programs. As shown in the figure, the
controlling device 102 includes mainly an instruction-analyzing
part 102a, a browsing processing part 102b, an
authentication-processing part 102c, an electronic mail-generating
part 102d, a Web page-generating part 102e, a receiving part 102f,
an index-calculating part 102g, a disease state-evaluating part
102h, a result outputting part 102i, and a sending part 102j. The
controlling device 102 performs data processing (data filtering or
data editing) such as removal of data including defective values or
many outliers and of variables for the defective value-including
data in the amino acid concentration data obtained in the receiving
part 102g described below.
[0079] The instruction-analyzing part 102a analyzes the instruction
from the client apparatus 200 or the database apparatus 400 and
sends the instruction to other parts in the controlling device 102
according to the analytical result. Upon receiving browsing
instruction for various screens from the client apparatus 200, the
browsing processing part 102b generates and transmits the web data
for these screens. Upon receiving authentication instruction from
the client apparatus 200 or the database apparatus 400, the
authentication-processing part 102c performs authentication. The
electronic mail-generating part 102d generates an electronic mail
including various information. The Web page-generating part 102e
generates a Web page for user browsing.
[0080] The receiving part 102f receives the information
(specifically, the amino acid concentration data including blood
amino acid concentration values, and the indices) transmitted from
the client apparatus 200 and the database apparatus 400. The
index-calculating part 102g calculates the index indicating the
degree of hepatic fibrosis from the amino acid concentration data
to be evaluated received in the receiving part 102f, based on one
or more indices (specifically, one or more indices stored in the
index database 106c). Specifically, the index-calculating part 102g
calculates the index by substituting the amino acid concentration
data into one or more indices. The index-calculating part 102g may
calculate the index from the amino acid concentration data, based
on an index formula previously selected and downloaded from the
indices stored in the memory device of the database apparatus
400.
[0081] The disease state-evaluating part 102h evaluates (predicts
or determines) the disease state of the hepatic disease to be
evaluated, based on the index calculated in the index-calculating
part 102g. The disease state-evaluating part 102h may determine
(discriminate) whether the progressive stage of hepatic fibrosis to
be evaluated is in the stage of F0, F1, or F2, or in the stage of
F3 or F4, by comparing the index with a previously set particular
threshold value (cutoff value). Alternatively, the disease
state-evaluating part 102h may determine (discriminate) whether the
progressive stage of hepatic fibrosis to be evaluated is in the
stage of F0, F1, F2, or F3 or in the stage of F4, by comparing the
index with a previously set particular threshold value (cutoff
value).
[0082] The result outputting part 102i outputs the evaluation
results obtained in the disease state-evaluating part 102h, the
processing results in the other processing parts, and others into
the output device 114. The sending part 102j sends the evaluation
results obtained in the disease state-evaluating part 102h to the
client apparatus 200 that has sent the amino acid concentration
data and the database apparatus 400 and other various information
to the client apparatuses 200 and the database apparatus 400.
[0083] [2-2. System Configuration of Client Apparatus 200]
[0084] FIG. 10 is a block diagram showing an example of the
configuration of the client apparatus 200 in the present system,
showing conceptually only the region relevant to the present
invention.
[0085] As shown in FIG. 10, the client apparatus 200 includes a
controlling device 210, a ROM 220, a HD (Hard Disk) 230, a RAM 240,
an input device 250, an output device 260, an input/output IF 270,
and an communication IF 280 that are connected communicatively to
each other. The controlling device 210 has a Web browser 211, an
electronic mailer 212, a receiving part 213, and a sending part
214. The Web browser 211 performs browsing processing of
interpreting Web data and displaying the interpreted Web data on a
monitor 261 described below. The Web browser 211 may have various
plug-in software, such as stream player, having functions to
receive, display and feedback streaming screen image. The
electronic-mailer 212 sends and receives electronic mails using a
particular protocol (e.g., SMTP (Simple Mail Transfer Protocol) or
POP3 (Post Office Protocol version 3)). The receiving part 213
receives various information, such as the evaluation results
transmitted from the hepatic disease-evaluating apparatus 100, via
the communication IF 280. The sending part 214 sends various
information, such as the amino acid concentration data, to the
hepatic disease-evaluating apparatus 100 and the database apparatus
400 via the communication IF 280. The input/output IF 270 is
connected to the input device 250 and the output device 260. The
input device 250 is, for example, a keyboard, mouse, or microphone.
The monitor 261 described below also functions as a pointing device
together with a mouse. The output device 260 is an output means for
outputting the information received via the communication IF 280,
and includes the monitor (including home television) 261 and a
printer 262. In addition, the output device 260 may have a speaker
or the like additionally. The communication IF 280 connects the
client apparatus 200 to the network 300 (or communication apparatus
such as router) communicatively. In other words, the client
apparatuses 200 are connected to the network 300 via a
communication apparatus such as modem, TA (Terminal Adapter) or
router, and a telephone line, or a private line. In this way, the
client apparatuses 200 can access to the hepatic disease-evaluating
apparatus 100 and the database apparatus 400 by using a particular
protocol.
[0086] The client apparatus 200 may be realized, as peripheral
parts such as printer, monitor, and image scanner connected as
needed to information processing apparatus (such as known personal
computer, workstation, family computer, Internet TV (Television),
or the other information processing terminal (such as PHS (Personal
Handyphone System) terminal, mobile phone terminal, mobile unit
communication terminal or PDA (Personal Digital Assistants))), and
also as software (including programs, data and others) for Web
data-browsing function and electronic mail-processing function
installed in the information processing apparatus. All or part of
the controlling device 210 in the client apparatus 200 may be
performed by a CPU and programs read and executed by the CPU. Thus,
computer programs for giving instructions to the CPU and executing
various processings together with the OS (Operating System) are
recorded in the ROM 220 or HD 230. The computer programs, which are
executed as they are loaded in the RAM 240, constitute the
controlling device 210 with the CPU. The computer programs may be
stored in an application program server connected via any network
to the client apparatus 200, and the client apparatus 200 may
download all or part of them as needed. All or any part of the
controlling device 210 may be substituted with hardware such as
wired-logic.
[0087] [2-3. System Configuration of Network 300]
[0088] The network 300 has a function to connect the hepatic
disease-evaluating apparatus 100, the client apparatuses 200, and
the database apparatus 400 mutually, communicatively to each other,
and is, for example, the Internet, intranet, or LAN (Local Area
Network (both wired/wireless)). The network 300 may be VAN (Value
Added Network), personal computer communication network, public
telephone network (including both analog and digital), leased line
network (including both analog and digital), CATV (Community
Antenna Television) network, portable switched network or portable
packet-switched network (including IMT2000 (International Mobile
Telecommunication 2000) system, GSM (Global System for Mobile
Communications) system, or PDC (Personal Digital Cellular)/PDC-P
system), wireless calling network, local wireless network such as
Bluetooth, PHS network, satellite communication network (including
CS (Communication Satellite), BS (Broadcasting Satellite) and ISDB
(Integrated Services Digital Broadcasting)), or the like.
[0089] [2-4. System Configuration of Database Apparatus 400]
[0090] FIG. 11 is a block diagram showing an example of the
configuration of the database apparatus 400 in the present system,
showing conceptually only the region relevant to the present
invention.
[0091] The database apparatus 400 has functions to store, for
example, the amino acid concentration data to be evaluated
transmitted from the client apparatuses 200, the indices used in
the hepatic disease-evaluating apparatus 100, and the evaluation
results obtained in the hepatic disease-evaluating apparatus 100.
As shown in FIG. 11, the database apparatus 400 has mainly, a
controlling device 402, such as CPU, which controls the entire
database apparatus 400 integrally, a communication interface 404
connected to a communication apparatus such as router (not shown in
the figure), for example, to a communication line, a memory device
406 storing various data, tables and others, and an input/output
interface 408 connected to an input device 412 and an output device
414, and these parts are connected communicatively to each other
via any communication channel. The database apparatus 400 is
connected to the network 300 communicatively via a communication
apparatus such as router and via a wired or wireless communication
line such as private line.
[0092] The memory device 406 is a storage means, and may be, for
example, memory apparatus such as RAM or ROM, fixed disk drive such
as hard disk, flexible disk, optical disk, or the like. Various
programs, tables, files, web-page files, and others used in various
processings are stored in the memory device 406. The communication
interface 404 allows communication between the database apparatus
400 and the network 300 (or communication apparatus such as
router). Thus, the communication interface 404 has a function to
communicate data with other terminal via a communication line. The
input/output interface 408 is connected to the input device 412 and
the output device 414. A monitor (including home television), a
speaker, or a printer may be used as the output device 414
(hereinafter, a monitor may be described as the output device 414).
A keyboard, a mouse, a microphone, or a monitor functioning as a
pointing device together with a mouse may be used as the input
device 412.
[0093] The controlling device 402 has an internal memory storing
control programs such as OS (Operating System), programs for
various processing procedures, and other needed data, and performs
information processing for execution of various processings
according to these programs. As shown in the figure, the
controlling device 402 includes mainly an instruction-analyzing
part 402a, a browsing processing part 402b, an
authentication-processing part 402c, an electronic mail-generating
part 402d, a Web page-generating part 402e, and a sending part
402f.
[0094] The instruction-analyzing part 402a analyzes the instruction
from the hepatic disease-evaluating apparatus 100 and client
apparatus 200 and sends the instruction to other parts in the
controlling device 402 according to the analytical result. Upon
receiving various screen-browsing instructions from the hepatic
disease-evaluating apparatus 100 and the client apparatus 200, the
browsing processing part 402b generates and transmits web data for
these screens. Upon receipt of authentication instruction from the
hepatic disease-evaluating apparatus 100 or the client apparatus
200, the authentication-processing part 402c performs
authentication. The electronic mail-generating part 402d generates
an electronic mail including various information. The Web
page-generating part 402e generates a Web page for user browsing.
The sending part 402f sends the index to the hepatic
disease-evaluating apparatus 100 and various information (e.g., the
amino acid concentration data previously stored in a particular
memory region of the memory device 406) to the hepatic
disease-evaluating apparatus 100 and the client apparatuses
200.
[0095] [3. Processing in System]
[0096] Hereinafter, an example of the processing performed in the
present system in the configuration above will be described with
reference to FIGS. 12 and 13.
[0097] [3-1. Hepatic Disease Evaluation Service Processing]
[0098] Here, an example of the hepatic disease evaluation service
processing performed in the present system will be described with
reference to FIG. 12. FIG. 12 is a flowchart showing an example of
the hepatic disease evaluation service processing performed in the
present system.
[0099] The amino acid concentration data to be evaluated used in
the present processing is data including values concerning amino
acid concentration obtained by analyzing blood previously collected
from a subject to be evaluated. Hereinafter, the method of
analyzing blood amino acid will be described briefly. First, a
blood sample is collected in a heparin-treated tube, and then, the
blood plasma is separated by centrifugation of the tube. All blood
plasma sample separated is frozen and stored at minus 70.degree. C.
before measurement of amino acid concentration. Before measurement
of amino acid concentration, to the blood plasma sample is added
sulfosalicylic acid to a concentration of 3%, for removal of
protein. An amino acid analyzer by high-performance liquid
chromatography (HPLC) by using ninhydrin reaction in the post
column was used for measurement of amino acid concentration.
[0100] First, the client apparatus 200 connects itself to the
hepatic disease-evaluating apparatus 100 via the network 300, when
the user specifies the Web site address (such as URL) provided from
the hepatic disease-evaluating apparatus 100, via the input device
250 on the screen displaying Web browser 211. Specifically, when
the user instructs update of the browser 211 screen on the client
apparatus 200, the Web browser 211 sends the Web site's URL using a
particular protocol via the communication IF 280, transmits an
instruction demanding transmission of the Web page corresponding to
the amino acid concentration data transmission screen to the
hepatic disease-evaluating apparatus 100 based on the routing of
the URL.
[0101] Then upon receipt of the instruction from the client
apparatus 200, the instruction-analyzing part 102a in hepatic
disease-evaluating apparatus 100 analyzes the transmitted
instruction and sends the instruction to other parts in the
controlling device 102 according to the analytical result. When the
transmitted instruction is an instruction to send the Web page
corresponding to the amino acid concentration data transmission
screen, the browsing processing part 102b mainly obtains the Web
data for display of the Web page stored in a particular region of
the memory device 106 and sends the Web data to the client
apparatus 200 via the communication interface 104. Specifically,
upon receiving the Web page transmission instruction by the user,
the controlling device 102 in the hepatic disease-evaluating
apparatus 100 demands input of user ID and user password from the
user. If the user ID and password are input, the
authentication-processing part 102c examines the input user ID and
password by comparing them with the user ID and user password
stored in the user information file 106a for authentication, and
the browsing processing part 102b sends the Web data to the client
apparatus 200, only when the user is authenticated. The client
apparatus 200 is identified with the IP (Internet Protocol) address
transmitted from the client apparatus 200 together with the
transmission instruction.
[0102] Then, the client apparatus 200 receives in the receiving
part 213 the Web data transmitted from the hepatic
disease-evaluating apparatus 100 via the communication IF 280,
examines the Web data with the Web browser 211, and displays the
amino acid concentration data transmission screen on the monitor
261. The instruction demanding transmission of screen from the
client apparatus 200 to the hepatic disease-evaluating apparatus
100, the transmission of the Web data from the hepatic
disease-evaluating apparatus 100 to the client apparatus 200 and
the display of the Web page in the client apparatus 200 are
performed almost similarly, and thus, detailed description will be
omitted below.
[0103] When the user inputs and selects the amino acid
concentration data of the subject to be evaluated via the input
device 250 of client apparatus 200, the sending part 214 of the
client apparatus 200 sends an identifier for identifying input
information and selected items to the hepatic disease-evaluating
apparatus 100 (step SA-1). Thus, the user can send the amino acid
concentration data of the subject to be evaluated to the hepatic
disease-evaluating apparatus 100. In step SA-1, transmission of the
amino acid concentration data to the hepatic disease-evaluating
apparatus 100 may be performed, for example, by using an existing
file transfer technology such as FTP (File Transfer Protocol).
[0104] After the processing in step SA-1, the hepatic
disease-evaluating apparatus 100 may analyze the identifier
transmitted from the client apparatus 200 and the instruction from
the client apparatus 200 in the instruction-analyzing part 102a and
send an instruction demanding transmission of the index formula
used in calculation of the index to the database apparatus 400; and
the database apparatus 400 may analyze the instruction sent form
the hepatic disease-evaluating apparatus 100 in the
instruction-analyzing part 402a and send the index formula
(specifically updated newest index) stored in a particular region
of the memory device 406 to the hepatic disease-evaluating
apparatus 100 via the communication interface 404.
[0105] The hepatic disease-evaluating apparatus 100 then receives
the amino acid concentration data transmitted from the client
apparatuses 200 via the communication interface 104 in the
receiving part 102f, stores the received amino acid concentration
data in a particular region of the amino acid concentration data
file 106b, and executes [3-2. hepatic disease evaluation
processing] described below (step SA-3).
[0106] The sending-part 102f of the hepatic disease-evaluating
apparatus 100 then sends the evaluation results (evaluation results
concerning the disease state of the hepatic disease of the subject
to be evaluated) obtained in step SA-3 to the client apparatus 200
that has sent the amino acid concentration data of the subject to
be evaluated and the database apparatus 400 (step SA-4).
Specifically, the hepatic disease-evaluating apparatus 100 first
generates a Web page for display of evaluation results in the Web
page-generating part 102 and stores it in a particular memory
region of the memory device 106. Then, the user is authenticated as
described above by inputting a predetermined URL (Uniform Resource
Locator) into the Web browser 211 of the client apparatus 200 via
the input device 250, and the client apparatus 200 sends a Web page
browsing instruction to the hepatic disease-evaluating apparatus
100. The hepatic disease-evaluating apparatus 100 then examines the
browsing instruction transmitted from the client apparatus 200 in
the browsing processing part 102a and reads the Web page out of the
memory device 106. The hepatic disease-evaluating apparatus 100
then sends Web data corresponding to the read-out Web page to the
client apparatus 200 from the sending part 102f. The hepatic
disease-evaluating apparatus 100 may send only the evaluation
results or the data same as the Web data sent to the client
apparatus 200 to the database apparatus 400.
[0107] In step SA-4, the hepatic disease-evaluating apparatus 100
may notify the evaluation results to the user client apparatus 200
by electronic mail. Specifically, the hepatic disease-evaluating
apparatus 100 first acquires the user electronic mail address in
the electronic mail-generating part 102d at the transmission timing
for example based on the user ID, with reference to the user
information stored in the user information file 106a. The hepatic
disease-evaluating apparatus 100 then generates electronic mail
data including user name and evaluation result, with the electronic
mail address obtained as its mail address in the electronic
mail-generating part 102d. The hepatic disease-evaluating apparatus
100 then sends the generated data from the sending part 102j. Also
in step SA-4, the hepatic disease-evaluating apparatus 100 may send
the evaluation results to the user client apparatus 200 by using an
existing file transfer technology such as FTP.
[0108] Then, the controlling device 402 in the database apparatus
400 receives the evaluation results or the Web data transmitted
from the hepatic disease-evaluating apparatus 100 via the
communication interface 404 and stores (accumulates) the evaluation
results or the Web data in a particular memory region of the memory
device 406 (step SA-5).
[0109] The receiving part 213 of the client apparatus 200 receives
the Web data transmitted from the hepatic disease-evaluating
apparatus 100 via the communication IF 280, analyzes the received
Web data with the Web browser 211, and outputs the Web page screen
displaying the evaluation result on the monitor 261 (step
SA-6).
[0110] In this way, the user knows the evaluation results
concerning the disease state of the hepatic disease of the subject
to be evaluated by browsing the Web page displayed on the monitor
261 of client apparatus 200. The user can print out the content of
the Web page displayed on the monitor 261 in a printer 262. When
the evaluation results are sent from the hepatic disease-evaluating
apparatus 100 by electronic mail, the user can receive the
transmitted electronic mail at any timing in the electronic mailer
212 of the client apparatus 200, and display the received
electronic mail on the monitor 261 with the known function of the
electronic mailer 212. The user may print out the content of the
electronic mail displayed on the monitor 261 in the printer
262.
[0111] These are description of the hepatic disease evaluation
service processing.
[0112] [3-2. Hepatic Disease Evaluation Processing]
[0113] Hereinafter, an example of the hepatic disease evaluation
processing performed in the hepatic disease-evaluating apparatus
100 will be described in detail with reference to FIG. 13. FIG. 13
is a flowchart showing an example of the hepatic disease evaluation
processing performed in the hepatic disease-evaluating apparatus
100.
[0114] First, data unpreferred in calculating the index (data
including defective values or many outliers) are removed from the
amino acid concentration data received in the controlling device
102 in step SA-2 (step SB-1: data editing).
[0115] Then in the index-calculating part 102g, the index
indicating the degree of hepatic fibrosis is calculated from the
amino acid concentration data edited in step SB-1, based on one or
more indices previously stored in a particular memory region of the
index database 106c (an index or a combination of plurality of
indices), and the index is stored in a particular memory region of
the index file 106d (step SB-2).
[0116] The index used in step SB-2 has a numerator of its
fractional expressions including at least one of Phe and Tyr and at
least one of Thr, Met and Orn and a denominator of the fractional
expressions including at least one of Val, Leu and Ile and at least
one of Pro and Gly, or the numerator of the fractional expressions
including at least one of Val, Leu and Ile and at least one of Pro
and Gly and the denominator of the fractional expressions including
at least one of Phe and Tyr and at least one of Thr, Met and
Orn.
[0117] Alternatively, the index used in step SB-2 may be
specifically the sum of two fractional expressions; the numerator
in one fractional expression is any one of Phe and Tyr and the
denominator in the one fractional expression is any one of Val,
Leu, and Ile; and the numerator in the other fractional expression
is the sum of at least one of Thr, Met and Orn, and the denominator
of the other fractional expression is the sum of at least one of
Pro and Gly. Alternatively, the index used in step SB-2 may be, in
particular, the sum of the two fractional expressions, and the
numerator in one fractional expression is Phe and the denominator
in the one fractional expression, Val; and the numerator in the
other fractional expression is the sum of Thr, Met and Orn and the
denominator of the other fractional expression, the sum of Pro and
Gly.
[0118] Then, the disease state of the hepatic disease of the
subject to be evaluated is evaluated in the disease
state-evaluating part 102h, based on the index calculated in step
SB-2, and the evaluation results are stored in a particular memory
region of the evaluation result file 106e (step SB-3). Here in step
SB-3, it may be determined whether the progressive stage of hepatic
fibrosis of the subject to be evaluated is in the stage of F0, F1,
or F2, or in the stage of F3 or F4, by comparing the index
calculated in step SB-2 with a previously set particular threshold
value (cutoff value). Alternatively, it may be determined whether
the progressive stage of hepatic fibrosis of the subject to be
evaluated is in the stage of F0, F1, F2, or F3 or in the stage of
F4 by comparing the index calculated in step SB-2 with the
previously set particular threshold value (cutoff value).
[0119] These are description of the hepatic disease evaluation
processing.
[0120] As described above, in the hepatic disease-evaluating
apparatus 100, the index indicating the degree of hepatic fibrosis
is calculated from the amino acid concentration data of the subject
to be evaluated including the amino acid concentration values based
on the one or more indices of the fractional expressions having the
amino acid concentrations as the variables, and the disease state
of the hepatic disease of the subject to be evaluated is evaluated,
based on the index value. The index used in the calculation of the
index has the numerator of the fractional expressions including at
least one of Phe and Tyr and at least one of Thr, Met and Orn and
the denominator of the fractional expressions including at least
one of Val, Leu and Ile and at least one of Pro and Gly, or the
numerator of the fractional expressions including at least one of
Val, Leu and Ile and at least one of Pro and Gly and the
denominator of the fractional expressions including at least one of
Phe and Tyr and at least one of Thr, Met and Orn. Thus, it is
possible to evaluate progress of the disease state of hepatic
disease accurately and to determine, for example, whether treatment
with interferon/ribavirin combination is needed to patients with a
hepatic disease accurately. Specifically, it is possible to
determine whether the hepatic fibrosis of a patient is in the stage
of F0, F1, or F2, or in the stage of F3 or F4 accurately. It is
also possible specifically to determine whether the hepatic
fibrosis of a patient is in the stage of F0, F1, F2, or F3, or in
the stage of F4 accurately.
[0121] The gold standard method for diagnosis of stepwise progress
of hepatic fibrosis or liver cirrhosis has been performed with the
use of hepatic biopsy or laparoscopy, and the indicator consisting
of stages of F0, F1, F2, F3, and F4 by the METAVIR scoring method
has been used as the fibrosis stage indicator. The stage F0 is a
state without fibrosis; fibrosis starts at the stages F1, and
progresses to the stages F2 and F3; and the stage F4 is the final
disease stage of liver cirrhosis. Such an invasive diagnosis exerts
a burden such as pain on the patient and also may cause risks such
as bleeding by the test. Accordingly, there exists a need for a
non-invasive diagnostic method. Proposed as the non-invasive
diagnostic methods are methods using blood platelet, globulin, AST,
ALT, albumin, hyaluronic acid, and the like alone or in combination
as an index (e.g., "Luo J. C., Hwang S. J., Chang F. Y., Chu C. W.,
Lai C. R., Wang Y. J., Lee P. C., Tsay S. H., and Lee S. D., Simple
blood tests can predict compensated liver cirrhosis in patients
with chronic hepatitis C. Hepatogastroenterology 49, 478 (2002)",
"Pohl A., Behling C., Oliver D., Kilani M., Monson P., and
Hassanein T., Serum aminotransferase levels and platelet counts as
predictors of degree of fibrosis in chronic hepatitis C virus
infection. Am. J. Gastroenterol, 96, 3142 (2001)", "Wai C. T.,
Greenson J. K, Fontana R. J., Kalbfleisch J. D., Marrero J. A.,
Conjeevaram H. S., and Lok A. S., A simple noninvasive index can
predict both significant fibrosis and cirrhosis in patients with
chronic hepatitis C. Hepatology, 38, 518 (2003)", and others).
There are still some indices lower in diagnostic performance and
demanding further improvement among these indices. In addition,
some of them is accompanied by analytical complexity demanding
plurality of proteins in quantitative determination (e.g.,
"Fibrotest; Biopredictive, Houilles, France, U.S. patent
application Ser. No. 09/687,459").
[0122] Although the Fischer ratio "(Leu+Val+Ile)/(Phe+Tyr)"
proposed by Fischer is known as an index using blood amino acid
concentration in diagnosis of hepatic disease (BTR ratio
"(Leu+Val+Ile)/Tyr", which is a simplified Fischer ratio, is also
used in clinical diagnosis for the same purpose with the Fischer
ratio), it is only used in diagnosis of hepatic encephalopathy in
the patients with liver cirrhosis ("J. E. Fischer, J. M. Funovics,
A. Aguirre, J. H. James, J. M. Keane, R. I. Wesdorp, N. Yoshimura,
and T. Westman, The role of plasma amino acids in hepatic
encephalopathy, Surgery 78 (1975) 276-290"). The index described in
International Publication WO2004/052,191 filed by the present
applicant is also known as a method of diagnosing hepatitis using
blood amino acid, but it is an index aimed at differentiating the
stage F0 from the stages other than F0.
[0123] For clinical purpose, there exists a need for a method of
discriminating the progressive stage of fibrosis and determining
whether the treatment with interferon/ribavirin combination is
needed. In particular, there is a need for discriminating two
groups: stage F0, F1, or F2 and stage F3 or F4, or stage F0, F1,
F2, or F3 and stage F4.
[0124] After intensive studies to meet the clinical need, the
inventors have found that there is significant correlation between
an index using blood amino acid concentration and the progress of
hepatic disease, especially hepatic fibrosis, and completed the
present invention. Accordingly, the present invention provides a
novel index satisfying the clinical need as a useful index, and it
is possible to evaluate progress of the disease state of hepatic
disease accurately and determine, for example, whether treatment
with interferon/ribavirin combination is needed to patients with a
hepatic disease accurately, by using the hepatic disease-evaluating
apparatus 100. Specifically, it is possible to determine whether
the hepatic fibrosis of a patient is in the stage of F0, F1, or F2
or in the stage of F3 or F4 accurately. Specifically, it is also
possible to determine whether the hepatic fibrosis of a patient is
in the stage of F0, F1, F2 or F3 or in the stage of F4 accurately.
The hepatic disease-evaluating apparatus 100 allows diagnosis of
hepatic diseases, in particular disease state of hepatitis, chronic
hepatitis, hepatic fibrosis, and liver cirrhosis, more easily and
accurately than traditional methods.
[0125] The index formula used in calculation of the index according
to the present invention may be the sum of two fractional
expressions; the numerator in one fractional expression is any one
of Phe and Tyr and the denominator in the one fractional expression
is any one of Val, Leu, and Ile; and the numerator in, the other
fractional expression is the sum of at least one of Thr, Met and
Orn and the denominator of the other fractional expression is the
sum of at least one of Pro and Gly. The index formula used in
calculation of the index may be, in particular, the sum of the two
fractional expressions; the numerator in the one fractional
expression is Phe and the denominator in the one fractional
expression is Val; and the numerator in the other fractional
expression is the sum of Thr, Met and Orn and the denominator of
the other fractional expression is the sum of Pro and Gly. It is
thus possible to evaluate progress of the disease state of hepatic
disease more accurately and determine, for example, whether
treatment with interferon/ribavirin combination is needed to
patients with a hepatic disease more accurately. Specifically, it
is possible to determine whether the hepatic fibrosis of a patient
is in the stage of F0, F1, or F2 or in the stage of F3 or F4 more
accurately. Specifically, it is also possible to determine whether
the hepatic fibrosis of a patient is in the stage of F0, F1, F2, or
F3 or in the stage of F4 more accurately.
[0126] According to the present invention, the hepatic disease
includes at least one of hepatitis, chronic hepatitis, hepatic
fibrosis and liver cirrhosis, and thus, it is possible to apply the
present invention suitably to clinically, frequently required
evaluation of the disease state of at least one of diseases such as
hepatitis, chronic hepatitis, hepatic fibrosis and liver
cirrhosis.
[0127] In addition to the embodiments above, various different
embodiments of the present invention are possible within the
technological scope of the Claims. For example, among the
processings described in the embodiments above, all or part of the
processings described above as performed automatically may be
performed manually, and all or part of the manually-conducted
processings may be performed automatically by known methods. In
addition, the processing procedure, control procedure, typical
name, various registered data, information including parameters
such as retrieval condition, screen, and database configuration
shown in the description above or drawings may be modified
arbitrarily, unless specified otherwise. For example, the
components of the hepatic disease-evaluating apparatus 100 shown in
the figures are conceptual functionally and may not be the same
physically as those shown in the figure. In addition, all or part
of the operational function of each component and each device in
the hepatic disease-evaluating apparatus 100 (in particular,
processings in controlling device 102) may be executed by the CPU
(Central Processing Unit) or the programs executed by the CPU, and
may be realized as wired-logic hardware.
[0128] The "program" is a data processing method written in any
language or by any description method and may be of any format such
as source code or binary code. The "program" may not be an
independent program, and may be operated together with plurality of
modules and libraries or with a different program such as OS
(Operating System). The program is stored on a recording medium and
read mechanically as needed by the hepatic disease-evaluating
apparatus 100. Any well-known configuration or procedure may be
used for reading the programs recorded on the recording medium in
each apparatus and for reading procedure and installation of the
procedure after reading.
[0129] The "recording media" includes any "portable physical
media", "fixed physical media", and "communication media". Examples
of the "portable physical media" include flexible disk, magnetic
optical disk, ROM, EPROM (Erasable Programmable Read Only Memory),
EEPROM (Electronically Erasable and Programmable Read Only Memory),
CD-ROM (Compact Disk Read Only Memory), MO (Magneto-Optical disk),
DVD (Digital Versatile Disk); and the like. Examples of the "fixed
physical media" include various media installed in a computer
system such as ROM, RAM, and HD. The "communication media" are, for
example, media storing the program for a short period of time such
as communication line and carrier wave when the program is
transmitted via a network such as LAN (Local Area Network), WAN
(Wide Area Network), or the Internet.
Example 1
[0130] In Example 1, diagnosis results obtained by hepatic biopsy
and those obtained according to the index concerning whether the
progressive stage of hepatic fibrosis of a patient with hepatitis C
is in the stage of F0, F1, F2, or F3 or in the stage of F4 were
compared. After intensive studies to maximize the efficiency of
discriminating the two groups: "F0, F1, F2, or F3" and "F4"
concerning the progressive stage of hepatic fibrosis, an index 1:
"(Phe)/(Val)+(Thr+Met+Orn)/(Pro+Gly)" was obtained as such an
index. The diagnostic performance of the index 1 for discrimination
of the two groups: "F0, F1, F2, or F3" and "F4" was evaluated by
using the AUC (Area Under Curve) of the ROC curve (Receiver
Operating Characteristic Curve) shown in FIG. 14. In diagnosis
according to the index 1, the blood amino acid concentration, as
determined from the blood samples of hepatitis C patients diagnosed
by hepatic biopsy by using the amino acid analysis method described
in the embodiment above was used.
[0131] As a result, the AUC of index 1 was 099.+-.001 (95%
confidence interval: 0.96 to 1.00). On the other hand,
discrimination of two groups "F0, F1, F2, or F3" and "F4" according
to the Fischer ratio "(Leu+Val+Ile)/(Phe+Tyr)" was performed, and
the diagnostic performance was evaluated with the AUC of ROC curve,
similarly to the index 1, giving an AUC of 0.91.+-.0.04 (95%
confidence interval: 0.83 to 0.99). As shown in FIG. 16, the
sensitivity was 81%; the specificity, 96%; the positive predictive
value, 87%; and the negative predictive value, 92%, in
discrimination of two groups "F0, F1, F2, or F3" and "F4" by using
the index 1, when the cutoff value was 1.10.
[0132] As apparent, the index 1 was found to be a useful index
higher in diagnostic performance (typically, superior in diagnostic
performance to the Fischer ratio) in discrimination of two groups
"F0, F1, F2, or F3" and "F4".
Example 2
[0133] In Example 2, the diagnosis results obtained by hepatic
biopsy and those obtained according to the index concerning whether
the progressive stage of hepatic fibrosis of a patient with
hepatitis C is in the stage of F0, F1, or F2 or in the stage of F3
or F4 were compared. After intensive studies to maximize the
efficiency of discriminating the two groups: "F0, F1, or F2" and
"F3 or F4" concerning the progressive stage of hepatic fibrosis, an
index 1 "(Phe)/(Val)+(Thr+Met+Orn)/(Pro+Gly)" was obtained as such
an index, similarly to Example 1. The diagnostic performance of the
index 1 for discrimination of the two groups "F0, F1, or F2" and
"F3 or F4" was evaluated by using the AUC (Area Under Curve) of the
ROC curve (Receiver Operating Characteristic Curve) shown in FIG.
15. In the diagnosis according to the index 1, the blood amino acid
concentration used in Example 1 was used.
[0134] As a result, the AUC of index 1 was 0.92.+-.0.04 (95%
confidence interval: 0.84 to 1.00). On the other hand,
discrimination of two groups "F0, F1, or F2" and "F3 or F4"
according to the Fischer ratio "(Leu+Val+Ile)/(Phe+Tyr)" was
performed and the diagnostic performance was evaluated with the AUC
of ROC curve similarly to the index 1, giving an AUC of
0.87.+-.0.05 (95% confidence interval: 0.77 to 0.96). As shown in
FIG. 16, the sensitivity was 89%; the specificity, 88%; the
positive predictive value, 79%; and the negative predictive value,
88%, in discrimination of two groups "F0, F1, or F2" and "F3 or F4"
by using the index 1, when the cutoff value was 0.95.
[0135] As apparent, the index 1 was found to be a useful index
higher in diagnostic performance in discrimination of two groups
"F0, F1, or F2" and "F3 or F4" (especially, superior in diagnostic
performance to the Fischer ratio).
Example 3
[0136] In Example 3, the diagnosis results obtained by hepatic
biopsy and those obtained according to the index concerning whether
the progressive stage of hepatic fibrosis of a patient with
hepatitis C is in the stage of F0, F1, F2, or F3 or in the stage of
F4 were compared. After intensive studies to maximize the
efficiency of discriminating the two groups: "F0, F1, F2, or F3"
and "F4" concerning the progressive stage of hepatic fibrosis, the
indices shown in FIGS. 17 to 20 were obtained as indices having a
diagnostic performance (discrimination efficiency) similar to the
index 1 in Example 1 or 2. The diagnostic performance of the
indices shown in FIGS. 17 to 20 in discrimination of two groups
"F0, F1, F2, or F3" and "F4" were evaluated by using the AUC of ROC
curve. The blood amino acid concentration used in Example 1 or 2
was used in diagnosis according to the index.
[0137] As a result, in discrimination of two groups "F0, F1, F2, or
F3" and "F4" by using the indices shown in FIGS. 17 to 20, it is
possible to obtain a sensitivity and a specificity for each index
shown in FIGS. 17 to 20, by selecting a cutoff value optimizing the
diagnostic performance.
[0138] As apparent, the indices shown in FIGS. 17 to 20 were found
to be useful indices higher in diagnostic performance in
discrimination of two groups "F0, F1, F2, or F3" and "F4". The fact
that the diagnostic performance of each index shown in FIGS. 17 to
20 is equivalent to the diagnostic performance of index 1 in
discrimination of two groups "F0, F1, F2, or F3" and "F4" seemingly
indicates that the correlation coefficient between Phe and Tyr is
high, the correlation coefficient among Val, Leu, and Ile is high,
or the correlation coefficient among the indices obtained by
replacing (Thr+Met+Orn) with one or two of Thr, Met, and Orn and
(Pro+Gly) with one of Pro and Gly or the indices in combination of
any substitution above is high.
Example 4
[0139] In Example 4, the diagnosis results obtained by hepatic
biopsy and those obtained according to the index concerning whether
the progressive stage of hepatic fibrosis of a patient with
hepatitis C is in the stage of F0, F1, or F2 or in the stage of F3
or F4 were compared. After intensive studies to maximize the
efficiency of discriminating the two groups: "F0, F1, or F2" and
"F3 or F4" concerning the progressive stage of hepatic fibrosis,
indices shown in FIGS. 17 to 20 were obtained as the indices having
a diagnostic performance (discrimination efficiency) similar to the
index 1 in Examples 1 or 2. The diagnostic performance of the
indices shown in FIGS. 17 to 20 in discrimination of the two groups
"F0, F1, or F2" and "F3 or F4" was evaluated by using the AUC (Area
Under Curve) of the ROC curve. In the diagnosis according to the
index, the blood amino acid concentration used in Examples 1, 2 or
3 was used.
[0140] As a result, the sensitivity and the specificity shown in
FIGS. 17 to 20 were obtained for each index, by selecting a cut off
value optimal for diagnostic performance, in discrimination of two
groups "F0, F1, or F2" and "F3 or F4" by using the indices shown in
FIGS. 17 to 20.
[0141] As apparent, the indices shown in FIGS. 17 to 20 were found
to be useful indices higher in diagnostic performance in
discrimination of two groups "F0, F1, or F2" and "F3 or F4". The
fact that the diagnostic performance of each index shown in FIGS.
17 to 20 is equivalent to the diagnostic performance of index 1 in
discrimination of two groups "F0, F1, or F2" and "F3 or F4"
seemingly indicates that the correlation coefficient between Phe
and Tyr is high, the correlation coefficient among Val, Leu, and
Ile is high, or the correlation coefficient among the indices
obtained by replacing (Thr+Met+Orn) with one or two of Thr, Met,
and Orn and (Pro+Gly) with one of Pro and Gly or the indices in
combination of any substitution above is high.
[0142] Although the invention has been described with respect to
specific embodiments for a complete and clear disclosure, the
appended claims are not to be thus limited but are to be construed
as embodying all modifications and alternative constructions that
may occur to one skilled in the art that fairly fall within the
basic teaching herein set forth.
* * * * *