U.S. patent application number 10/898316 was filed with the patent office on 2004-12-30 for pharmaceutical composition.
Invention is credited to Ikeda, Hitoshi, Odaka, Hiroyuki, Sohda, Takashi.
Application Number | 20040266830 10/898316 |
Document ID | / |
Family ID | 15563926 |
Filed Date | 2004-12-30 |
United States Patent
Application |
20040266830 |
Kind Code |
A1 |
Ikeda, Hitoshi ; et
al. |
December 30, 2004 |
Pharmaceutical composition
Abstract
Pharmaceutical composition which comprises an insulin
sensitivity enhancer in combination with other antidiabetics
differing from the enhancer in the mechanism of action, which shows
a potent depressive effect on diabetic hyperglycemia and is useful
for prophylaxis and treatment of diabetes.
Inventors: |
Ikeda, Hitoshi;
(Higashiosaka, JP) ; Sohda, Takashi; (Takatsuki,
JP) ; Odaka, Hiroyuki; (Kobe, JP) |
Correspondence
Address: |
WENDEROTH, LIND & PONACK, L.L.P.
2033 K STREET N. W.
SUITE 800
WASHINGTON
DC
20006-1021
US
|
Family ID: |
15563926 |
Appl. No.: |
10/898316 |
Filed: |
July 26, 2004 |
Related U.S. Patent Documents
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Application
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10898316 |
Jul 26, 2004 |
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10462793 |
Jun 17, 2003 |
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10462793 |
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10095453 |
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6599923 |
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10095453 |
Mar 13, 2002 |
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09973689 |
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6384062 |
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09973689 |
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09453521 |
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6329404 |
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09453521 |
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09280710 |
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6150383 |
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09280710 |
Mar 30, 1999 |
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09057465 |
Apr 9, 1998 |
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5965584 |
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09057465 |
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08667979 |
Jun 19, 1996 |
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5952356 |
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Current U.S.
Class: |
514/340 |
Current CPC
Class: |
A61P 5/00 20180101; Y10S
514/866 20130101; A61K 31/135 20130101; A61P 3/10 20180101; A61K
31/425 20130101; A61P 43/00 20180101; A61K 31/4245 20130101; A61K
31/445 20130101; A61K 31/50 20130101; A61K 31/64 20130101; A61P
5/50 20180101; A61K 45/06 20130101; A61P 3/00 20180101; A61K 9/2018
20130101; A61P 5/48 20180101; A61K 31/42 20130101; A61K 31/44
20130101; A61P 3/08 20180101; A61K 9/2054 20130101; A61K 31/52
20130101; A61K 31/19 20130101; A61K 31/415 20130101; A61K 31/70
20130101; A61K 31/535 20130101; A61K 31/4439 20130101; A61P 31/10
20180101; A61K 9/4858 20130101; A61K 31/4245 20130101; A61K 2300/00
20130101; A61K 31/425 20130101; A61K 2300/00 20130101; A61K 31/44
20130101; A61K 2300/00 20130101; A61K 31/52 20130101; A61K 2300/00
20130101; A61K 31/64 20130101; A61K 2300/00 20130101; A61K 31/70
20130101; A61K 2300/00 20130101; A61K 31/70 20130101; A61K 31/425
20130101; A61K 31/445 20130101; A61K 31/425 20130101; A61K 31/425
20130101; A61K 31/135 20130101; A61K 31/445 20130101; A61K 2300/00
20130101; A61K 31/64 20130101; A61K 31/425 20130101; A61K 31/425
20130101; A61K 31/425 20130101; A61K 31/52 20130101; A61K 31/44
20130101; A61K 31/44 20130101; A61K 31/21 20130101; A61K 31/44
20130101; A61K 31/19 20130101; A61K 31/425 20130101; A61K 31/19
20130101; A61K 31/425 20130101; A61K 31/135 20130101; A61K 31/44
20130101; A61K 31/44 20130101; A61K 31/425 20130101; A61K 31/155
20130101; A61K 31/44 20130101; A61K 31/405 20130101; A61K 31/44
20130101; A61K 31/40 20130101; A61K 31/44 20130101; A61K 31/365
20130101; A61K 31/44 20130101; A61K 31/22 20130101; A61K 31/425
20130101; A61K 31/405 20130101; A61K 31/425 20130101; A61K 31/40
20130101; A61K 31/425 20130101; A61K 31/365 20130101; A61K 31/425
20130101; A61K 31/22 20130101; A61K 31/4439 20130101; A61K 2300/00
20130101 |
Class at
Publication: |
514/340 |
International
Class: |
A61K 031/4439 |
Foreign Application Data
Date |
Code |
Application Number |
Jun 20, 1995 |
JP |
153500/1995 |
Claims
1-51. (Canceled)
52. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, and (b) a therapeutically effective amount an
antidiabetic, wherein the antidiabetic differs from the insulin
sensitivity enhancer in the mechanism of action.
53. The composition of claim 52, wherein the antidiabetic is
selected from the group consisting of an insulin preparation, a
sulfonylurea, a biguanide, and an .alpha.-glucosidase
inhibitor.
54. The composition of claim 53, wherein the antidiabetic is an
insulin preparation and wherein the insulin sensitivity enhancer is
a compound represented by the formula: 8wherein R' represents an
optionally substituted hydrocarbon or heterocycle group; Y
represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
55. A composition for the treatment of diabetes in a mammal
comprising: (a) a therapeutically effective amount of an insulin
preparation; and, (b) a therapeutically effective amount of one or
more of an orally administrable insulin sensitivity enhancer,
wherein the insulin sensitivity enhancer enhances insulin
sensitivity and reduces the therapeutically effective amount of
insulin preparation per dose of insulin preparation.
56. The composition of claim 55, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 9wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
57. The composition of claim 55, further comprising a
physiologically acceptable carrier.
58. The composition of claim 55, wherein the insulin sensitivity
enhancer is present in the composition in the range of about 0.01
to 10 mg/kg of subject body weight.
59. The composition of claim 52, wherein the insulin sensitivity
enhancer is selected from the group consisting of BRL-49653,
pioglitazone hydrochloride, and troglitazone.
60. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an antidiabetic.
61. The method of claim 60, wherein the antidiabetic is an insulin
preparation.
62. The composition of claim 61, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 10wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents; or a pharmacologically acceptable salt thereof.
63. The method of claim 60, wherein a physiologically acceptable
carrier is administered with the antidiabetic.
64. A method as claimed in claim 60, wherein the antidiabetic is
selected from the group consisting of: (a) an insulin preparation;
(b) a sulfonylurea; (c) a biguanide; and (d) an .alpha.-glucosidase
inhibitor.
65. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an orally administrable antidiabetic, wherein (1) the
insulin sensitivity enhancer is selected from the group consisting
of BRL-49653, pioglitazone hydrochloride, and troglitazone, and
wherein (2) the antidiabetic is selected from the group consisting
of an insulin preparation, a sulfonylurea, a biguanide, and an
.alpha.-glucosidase inhibitor.
66. The method of claim 65, wherein the antidiabetic is an orally
administrable antidiabetic.
67. The method of claim 66, wherein the antidiabetic is an insulin
preparation.
68. The method of claim 67, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 11wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
69. The method of claim 65, wherein the composition is formulated
for injection. PAGE 23.
70. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is an insulin
preparation.
71. The composition of claim 70, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 12wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
72. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is a sulfonylurea.
73. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is a biguanide.
74. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is BRL-49653,
and (b) a therapeutically effective amount of an antidiabetic,
wherein the antidiabetic is an insulin preparation.
75. The composition of claim 74, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 13wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
76. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is BRL-49653;
and (b) a therapeutically effective amount of an antidiabetic,
wherein the antidiabetic is a sulfonylurea.
77. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is BRL-49653,
and (b) a therapeutically effective amount of an antidiabetic,
wherein the antidiabetic is a biguanide.
78. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is pioglitazone
hydrochloride, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is an insulin
preparation.
79. The composition of claim 78, wherein the insulin sensitivity
enhancer is a compound represented by the formula: 14wherein R'
represents an optionally substituted hydrocarbon or heterocycle
group; Y represents a group represented by --CO--, --CH(OH)-- or
--NR.sup.3-- wherein R.sup.3 represents an optionally substituted
alkyl group; m is 0 or 1; n is 0, 1 or 2; X represents CH or N; A
represents a bond or a C.sub.1-7 divalent aliphatic hydrocarbon
group; Q represents oxygen atom or sulfur atom; R.sup.1 represents
hydrogen atom or an alkyl group; ring E may optionally have further
1 to 4 substituents, and the substituents may optionally be
combined with R.sup.1 to form a ring; L and M respectively
represent hydrogen atom, or L and M may optionally be combined with
each other to form a bond; wherein R' does not represent
benzopyranyl group when m and n are O, X represents CH, A
represents a bond, Q represents sulfur atom, R.sup.1, L and M
represent hydrogen atom, and ring E does not have further
substituents or a pharmacologically acceptable salt thereof.
80. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is pioglitazone
hydrochloride, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is an insulin preparation,
and wherein the composition is formulated for injection.
81. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is pioglitazone
hydrochloride, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is a sulfonylurea.
82. A composition for the treatment of diabetes comprising: (a) a
therapeutically effective amount of an insulin sensitivity
enhancer, wherein the insulin sensitivity enhancer is pioglitazone
hydrochloride, and (b) a therapeutically effective amount of an
antidiabetic, wherein the antidiabetic is a biguanide.
83. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an orally administrable antidiabetic, wherein (1) the
insulin sensitivity enhancer is BRL-49653, and wherein (2) the
antidiabetic is a sulfonylurea.
84. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an orally administrable antidiabetic, wherein (1) the
insulin sensitivity enhancer is BRL-49653, and wherein (2) the
antidiabetic is a biguanide.
85. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an orally administrable antidiabetic, wherein (1) the
insulin sensitivity enhancer is pioglitazone hydrochloride, and
wherein (2) the antidiabetic is a sulfonylurea.
86. A method for the treatment of diabetes comprising administering
to a mammal in need thereof a therapeutically effective amount of
an insulin sensitivity enhancer with a therapeutically effective
amount of an orally administrable antidiabetic, wherein (1) the
insulin sensitivity enhancer is pioglitazone hydrochloride, and
wherein (2) the antidiabetic is a biguanide.
Description
FIELD OF THE INVENTION
[0001] The present invention relates to a pharmaceutical
composition comprising an insulin sensitivity enhancer in
combination with one or more other antidiabetics differing from
said enhancer in the mechanism of action.
BACKGROUND OF THE INVENTION
[0002] Recent years, the pathology of diabetes has become more and
more understood and, in parallel, drugs specific for the respective
pathologic states have been developed. Accordingly a variety of
drugs having new mechanisms of action have appeared one after
another.
[0003] Insulin sensitivity enhancers are also known as insulin
resistance deblockers because they have the action to normalize the
impaired insulin receptor function, and are gathering much
attention in these years.
[0004] Regarding such insulin sensitivity enhancers, a very useful
compound such as pioglitazone has been developed [Fujita et al.,
Diabetes, 32, 804-810, 1983, JP-A S55(1980)-22636 (EP-A 8203), JP-A
S61(1986)-267580 (EP-A 193256)]. Pioglitazone restores the impaired
insulin receptor function to normalize the uneven distribution of
glucose transporters in cells, the cardinal enzyme systems
associated with glycometabolism, such as glucokinase, and enzyme
systems associated with lipidmetabolism, such as lipoprotein
lipase. As the results, insulin resistance are deblocked to improve
glucose tolerance, and lower the plasma concentrations of neutral
lipids and free fatty acids. Since these actions of pioglitazone
are comparatively gradual and the risk of side effect in long-term
administration is also low, this compound is useful for obese
patients who are presumed to be highly insulin-resistant.
[0005] Also, insulin sensitivity enhancers such as CS-045,
thiazolidinedione derivatives and substituted thiazolidinedione
derivatives are reported to be used in combination with insulin
[JP-A H4(1992)-66579, JP-A H4(1992)-69383, JP-A H5(1993)-202042].
However, the pharmaceutical composition having a specific
combination of the present invention is unknown.
[0006] Diabetes is a chronic disease with diverse pathologic
manifestations and is accompanied by lipidmetabolism disorders and
circulatory disorders as well as glycometabolism disorders. As the
results, diabetes tends to progress entailing various complications
in many cases. Therefore, it is necessary to select the drug of
choice for the prevailing disease state in each individual case.
However, this selection is often difficult in clinical settings
because single use of each individual drug can not bring sufficient
effects in some disease states and there are various problems such
as side effect which is caused by an increased dose or a long-term
administration.
SUMMARY OF THE INVENTION
[0007] In view of the above state of the art, the inventors of the
present invention did much research to develop antidiabetics which
would not virtually cause adverse reactions even on long-term
administration and could be effective for a large cohort of the
diabetic population. As a consequence, they discovered that the
above object can be accomplished by using an insulin sensitivity
enhancer, such as the drug described above, in combination with
other antidiabetics differing from said enhancer in the mechanism
of action, and accordingly have perfected the present
invention.
[0008] The present invention, therefore, relates to:
[0009] 1) Pharmaceutical composition which comprises an insulin
sensitivity enhancer in combination with at least one member of the
group consisting of an .alpha.-glucosidase inhibitor, an aldose
reductase inhibitor, a biguanide, a statin compound, a squalene
synthesis inhibitor, a fibrate compound, a LDL catabolism enhancer
and an angiotensin converting enzyme inhibitor;
[0010] 2) Pharmaceutical composition according to 1), wherein the
insulin sensitivity enhancer is a compound represented by the
formula: 1
[0011] wherein R represents an optionally substituted hydrocarbon
or heterocyclic group; Y represents a group represented by --CO--,
--CH(OH)-- or --NR.sup.3-- (wherein R.sup.3 represents an
optionally substituted alkyl group); m is 0 or 1; n is 0, 1 or 2; X
represents CH or N; A represents a bond or a C.sub.1-7 divalent
aliphatic hydrocarbon group; Q represents oxygen atom or sulfur
atom; R.sup.1 represents hydrogen atom or an alkyl group; ring E
may optionally have 1 to 4 substituents, and the substituents may
optionally be combined with R.sup.1 to form a ring, L and M
respectively represent hydrogen atom, or L and M may optionally be
combined with each other to form a bond; or a pharmacologically
acceptable salt thereof;
[0012] 3) Pharmaceutical composition according to 2), wherein the
compound represented by the formula (I) is pioglitazone;
[0013] 4) Pharmaceutical composition according to 1), which
comprises an insulin sensitivity enhancer in combination with an
.alpha.-glucosidase inhibitor;
[0014] 5) Pharmaceutical composition according to 4), wherein the
.alpha.-glucosidase inhibitor is voglibose;
[0015] 6) Pharmaceutical composition according to 4), wherein the
insulin sensitivity enhancer is pioglitazone and the
.alpha.-glucosidase inhibitor is voglibose;
[0016] 7) Pharmaceutical composition according to 1), which is for
prophylaxis or treatment of diabetes;
[0017] 8) Pharmaceutical composition which comprises a compound
represented by the formula: 2
[0018] wherein R' represents an optionally substituted hydrocarbon
or heterocyclic group; Y represents a group represented by --CO--,
--CH(OH)-- or --NR.sup.3-- (wherein R.sup.3 represents an
optionally substituted alkyl group); m is 0 or 1; n is 0, 1 or 2; X
represents CH or N; A represents a bond or a C.sub.1-7 divalent
aliphatic hydrocarbon group; Q represents oxygen atom or sulfur
atom; R.sup.1 represents hydrogen atom or an alkyl group; ring E
may optionally have 1 to 4 substituents, and the substituents may
optionally be combined with R.sup.1 to form a ring; L and M
respectively represent hydrogen atom, or L and M may optionally be
combined with each other to form a bond; with a proviso that R'
does not represent benzopyranyl group when m and n are O, X
represents CH, A represents a bond, Q represents sulfur atom,
R.sup.1, L and W represent hydrogen atom and ring E does not have
further substituents; or a pharmacologically acceptable salt
thereof in combination with an insulin secretion enhancer and/or an
insulin preparation;
[0019] 9) Pharmaceutical composition according to 8), wherein the
compound represented by the formula (II) is the compound
represented by the formula: 3
[0020] 10) Pharmaceutical composition according to 8), wherein the
compound represented by the formula (II) is pioglitazone;
[0021] 11) Pharmaceutical composition according to 8), wherein the
insulin secretion enhancer is glibenclamide;
[0022] 12) Pharmaceutical composition according to 8), wherein the
compound represented by the formula (II) is pioglitazone and the
insulin secretion enhancer is glibenclamide;
[0023] 13) Pharmaceutical composition according to 8), which is for
prophylaxis or treatment of diabetes.
DETAILED DESCRIPTION OF THE INVENTION
[0024] The term "insulin sensitivity enhancer" as used in this
specification means any and all drug substances that restore the
impaired insulin receptor function to deblock insulin resistance
and consequently enhance insulin sensitivity. As examples of the
insulin sensitivity enhancer, the compound represented by the
formula (I) or a pharmacologically acceptable salt thereof can be
mentioned.
[0025] In the formula (I), as the hydrocarbon group in the
optionally substituted hydrocarbon group represented by R, mention
is made of aliphatic hydrocarbon groups, alicyclic hydrocarbon
groups, alicyclic-aliphatic hydrocarbon groups, aromatic aliphatic
hydrocarbon groups and aromatic hydrocarbon groups. Number of
carbon atoms in these hydrocarbon groups is preferably 1 to 14.
[0026] The aliphatic hydrocarbon groups are preferably those having
1 to 8 carbon atoms. As the aliphatic hydrocarbon groups, mention
is made of C.sub.1-8 saturated aliphatic hydrocarbon groups (e.g.
alkyl group) as exemplified by methyl, ethyl, propyl, isopropyl,
butyl, isobutyl, sec.-butyl, t.-butyl, pentyl, isopentyl,
neopentyl, t.-pentyl, hexyl, isohexyl, heptyl and octyl, and
C.sub.2-8 unsaturated aliphatic hydrocarbon groups (e.g. alkenyl
group, alkadienyl group, alkynyl group, alkadiynyl group) as
exemplified by vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl,
3-butenyl, 2-methyl-1-propenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl,
4-pentenyl, 3-methyl-2-butenyl, 1-hexenyl, 3-hexenyl,
2,4-hexadienyl, 5-hexenyl, 1-heptenyl, 1-octenyl, ethynyl,
1-propynyl, 2-propynyl, 1-butynyl, 2-butynyl, 3-butynyl,
1-pentynyl, 2-pentynyl, 3-pentynyl, 4-pentynyl, 1-hexynyl,
3-hexynyl, 2,4-hexadiynyl, 5-hexynyl, 1-heptynyl and 1-octynyl.
[0027] The alicyclic hydrocarbon groups are preferably those having
3 to 7 carbon atoms. As the alicyclic hydrocarbon groups, mention
is made of C.sub.3-7 saturated alicyclic hydrocarbon groups (e.g.
cycloalkyl group) as exemplified by cyclopropyl, cyclobutyl,
cyclopentyl, cyclohexyl and cycloheptyl, and C.sub.5-7 unsaturated
alicyclic hydrocarbon groups (e.g. cycloalkenyl group,
cycloalkadienyl group) as exemplified by 1-cyclopentenyl,
2-cyclopentenyl, 3-cyclopentenyl, 1-cyclohexenyl, 2-cyclohexenyl,
3-cyclohexenyl, 1-cycloheptenyl, 2-cycloheptenyl, 3-cycloheptenyl
and 2,4-cycloheptadienyl.
[0028] As the alicyclic-aliphatic hydrocarbon groups, mention is
made of, among those formed by combination of the above-mentioned
alicyclic hydrocarbon groups with aliphatic hydrocarbon groups
(e.g. cycloalkyl-alkyl group, cycloalkenyl-alkyl group), ones
having 4 to 9 carbon atoms as exemplified by cyclopropylmethyl,
cyclopropylethyl, cyclobutylmethyl, cyclopentylmethyl,
2-cyclopentenylmethyl, 3-cyclopentenylmethyl, cyclolhexylmethyl,
2-cyclohexenylmethyl, 3-cyclohexenylmethyl, cyclohexylethyl,
cyclohexylpropyl, cycloheptylmethyl and cycloheptylethyl.
[0029] The aromatic aliphatic hydrocarbon groups are preferably
those having 7 to 13 carbon atoms (e.g. aralkyl group). As the
aromatic aliphatic hydrocarbon groups, mention is made of C.sub.7-9
phenylalkyl as exemplified by benzyl, phenethyl, 1-phenylethyl,
3-phenylpropyl, 2-phenylpropyl and 1-phenylpropyl, and C.sub.11-13
naphthylalkyl as exemplified by .alpha.-naphthylmethyl,
.alpha.-naphthylethyl, .beta.-naphthylmethyl and
.beta.-naphthylethyl.
[0030] As the aromatic hydrocarbon groups, mention is made of, ones
having 6 to 14 carbon atoms as exemplified by phenyl, naphthyl
(.alpha.-naphthyl, .beta.-naphthyl).
[0031] In the formula (I), as the heterocyclic group in the
optionally substituted heterocyclic group represented by R, mention
is made of, for example, 5- to 7-membered heterocyclic groups
containing, as a ring component atom, 1 to 4 hetero atoms selected
from oxygen atom, sulfur atom and nitrogen atom, and a condensed
ring group. As the condensed ring, mention is made of, for example,
these 5- to 7-membered heterocyclic groups condensed with
6-membered ring containing one or two nitrogen atoms, benzene ring
or 5-membered ring containing one sulfur atom.
[0032] Examples of these heterocyclic groups include 2-pyridyl,
3-pyridyl, 4-pyridyl, 2-pyrimidinyl, 4-pyrimidinyl, 5-pyrimidinyl,
6-pyrimidinyl, 3-pyridazinyl, 4-pyridazinyl, 2-pyrazinyl,
2-pyrrolyl, 3-pyrrolyl, 2-imidazolyl, 4-imidazolyl, 5-imidazolyl,
3-pyrazolyl, 4-pyrazolyl, isothiazolyl, isoxazolyl, 2-thiazolyl,
4-thiazolyl, 5-thiazolyl, 2-oxazolyl, 4-oxazolyl, 5-oxazolyl,
1,2,4-oxadiazol-5-yl, 1,2,4-triazol-3-yl, 1,2,3-triazol-4-yl,
tetrazol-5-yl, benzimidazol-2-yl, indol-3-yl, 1H-indazol-3-yl,
1H-pyrrolo[2,3-b]pyrazin-2-yl, 1H-pyrrolo[2,3-b]pyridin-6-yl,
1H-imidazo[4,5-b]pyridin-2-yl, 1H-imidazo[4,5-c]pyridin-2-yl,
1H-imidazo[4,5-b]pyrazin-2-yl and benzopyranyl. Among them,
pyridyl, oxazolyl or thiazolyl group is preferable.
[0033] In the formula (I), the hydrocarbon group and heterocyclic
group represented by R may optionally have 1 to 5, preferably 1 to
3 substituents at any substitutable positions. Examples of such
substituents include aliphatic hydrocarbon group, alicyclic
hydrocarbon group, aryl group, aromatic heterocyclic group,
non-aromatic heterocyclic group, halogen atom, nitro group,
optionally substituted amino group, optionally substituted acyl
group, optionally substituted hydroxyl group, optionally
substituted thiol group, optionally esterified carboxyl group,
amidino group, carbamoyl group, sulfamoyl group, sulfo group, cyano
group, azido group and nitroso group.
[0034] Examples of the aliphatic hydrocarbon groups include
C.sub.1-15 straight-chain or branched aliphatic hydrocarbon groups
as exemplified by alkyl group, alkenyl group, and alkynyl
group.
[0035] Preferable examples of the alkyl group include C.sub.1-10
alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl,
isobutyl, sec.-butyl, t.-butyl, pentyl, isopentyl, neopentyl,
t.-pentyl, 1-ethylpropyl, hexyl, isohexyl, 1,1-dimethylbutyl,
2,2-dimethylbutyl, 3,3-dimethylbutyl, 2-ethylbutyl, hexyl, pentyl,
octyl, nonyl and decyl.
[0036] Preferable examples of the alkenyl group include C.sub.2-10
alkenyl groups such as vinyl, allyl, isopropenyl, 1-propenyl,
2-methyl-1-propenyl, 1-butenyl, 2-butenyl, 3-butenyl,
2-ethyl-1-butenyl, 3-methyl-2-butenyl, 1-pentenyl, 2-pentenyl,
3-pentenyl, 4-pentenyl, 4-methyl-3-pentenyl, 1-hexenyl, 2-hexenyl,
3-hexenyl, 4-hexenyl and 5-hexenyl.
[0037] Preferable examples of the alkynyl group include C.sub.2-10
alkynyl groups such as ethynyl, 1-propynyl, 2-propynyl, 1-butynyl,
2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3-pentynyl,
4-pentynyl, 1-hexynyl, 2-hexynyl, 3-hexynyl, 4-hexynyl and
5-hexynyl.
[0038] As the alicyclic hydrocarbon group, mention is made of
C.sub.3-12 saturated or unsaturated alicyclic hydrocarbon groups as
exemplified by cycloalkyl group, cycloalkenyl group and
cycloalkadienyl group.
[0039] Preferable examples of cycloalkyl group include C.sub.3-10
cycloalkyl groups such as cyclopropyl, cyclobutyl, cyclopentyl,
cyclohexyl, cycloheptyl, cyclooctyl, bicyclo[2.2.1]heptyl,
bicyclo[2.2.2]octyl, bicyclo[3.2.1]octyl, bicyclo[3.2.2]nonyl,
bicyclo[3.3.1]nonyl, bicyclo[4.2.1]nonyl and
bicyclo[4.3.1]decyl.
[0040] Preferable examples of the cycloalkenyl group include
C.sub.3-10 cycloalkenyl groups such as 2-cyclopenten-1-yl,
3-cyclopenten-1-yl, 2-cyclohexen-1-yl and 3-cyclohexen-1-yl.
[0041] Preferable examples of the cycloalkadienyl group include
C.sub.4-10 cycloalkadienyl groups such as 2,4-cyclopentadien-1-yl,
2,4-cyclohexadien-1-yl and 2,5-cyclohexadien-1-yl.
[0042] Preferable examples of the aryl group include C.sub.6-14
aryl groups Such as phenyl, naphthyl (1-naphthyl, 2-naphthyl),
anthryl, phenanthryl and acenaphthylenyl.
[0043] Preferable examples of the aromatic heterocyclic group
include aromatic monocyclic heterocyclic groups such as furyl,
thienyl, pyrrolyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl,
imidazolyl, pyrazolyl, 1,2,3-oxadiazolyl, 1,2,4-oxadiazolyl,
1,3,4-oxadiazolyl, furazanyl, 1,2,3-thiadiazolyl,
1,2,4-thiadiazolyl, 1,3,4-thiadiazolyl, 1,2,3-triazolyl,
1,2,4-triazolyl, tetrazolyl, pyridyl, pyridazinyl, pyrimidinyl,
pyrazinyl and triazinyl; and aromatic condensed heterocyclic groups
such as benzofuranyl, isobenzofuranyl, benzo[b]thienyl, indolyl,
isoindolyl, 1H-indazolyl, benzimidazolyl, benzoxazolyl,
1,2-benzoisoxazolyl, benzothiazolyl, 1,2-benzoisothiazolyl,
1H-benzotriazolyl, quinolyl, isoquinolyl, cinnolinyl, quinazolinyl,
quinoxalinyl, phthalazinyl, naphthylidinyl, purinyl, pteridinyl,
carbazolyl, .alpha.-carbolinyl, .beta.-carbolinyl,
.gamma.-carbolinyl, acridinyl, phenoxazinyl, phenothiazinyl,
phenazinyl, phenoxathiinyl, thianthrenyl, phenathridinyl,
phenathrolinyl, indolizinyl, pyrrolo[1,2-b]pyridazinyl,
pyrazolo[1,5-a]pyridyl, imidazo[1,2-a]pyridyl,
imidazo[1,5-a]pyridyl, imidazo[1,2-b]pyridazinyl,
imidazo[1,2-a]pyrimidin- yl, 1,2,4-triazolo[4,3-a]pyridyl and
1,2,4-triazolo[4,3-b]pyridazinyl.
[0044] Preferable examples of the non-aromatic heterocyclic group
include oxiranyl, azetidinyl, oxetanyl, thietanyl, pyrrolidinyl,
tetrahydrofuryl, thiolanyl, piperidyl, tetrahydropyranyl,
morpholinyl, thiomorpholinyl, piperazinyl, pyrrolidino, piperidino,
morpliolino and thiomorpholino.
[0045] Examples of the halogen atom include fluorine, chlorine,
bromine and iodine.
[0046] As the substituted amino group in the optionally substituted
amino group, mention is made of, N-monosubstituted amino group and
N,N-disubstituted amino group. Examples of the substituted amino
groups include amino groups having once or two substituents
selected from C.sub.1-10 alkyl group, C.sub.2-10 alkenyl group,
C.sub.2-10 alkynyl group, aromatic group, heterocyclic group and
C.sub.1-10 acyl group (e.g. methylamino, dimethylamino, ethylamino,
diethylamino, dibutylamino, diallylamino, cyclohexylamino,
phenylamino, N-methyl-N-phenyl-amino, acetylamino, propionylamino,
benzoylamino and nicotinoylamino)
[0047] As the acyl group, mention is made of C.sub.1-13 acyl groups
such as C.sub.1-10 alkanoyl group, C.sub.3-10 alkenoyl group,
C.sub.4-10 cycloalkanoyl group, C.sub.4-10 cycloalkenoyl group and
C.sub.6-12 aromatic carbonyl group.
[0048] Preferable examples of the C.sub.1-10 alkanoyl group include
formyl acetyl, propionyl, butyryl, isobutyryl, valeryl, isovaleryl,
pivaloyl, hexanoyl, heptanoyl and octanoyl. Preferable examples of
the C.sub.3-10 alkenoyl group include acryloyl, methacryloyl,
crotonoyl and isocrotonoyl. Preferable examples of C.sub.4-10
cycloalkanoyl group include cyclobutanecarbonyl,
cyclopentanecarbonyl, cyclohexanecarbonyl and cycloheptanecarbonyl.
Preferable examples of C.sub.4-10 cycloalkenoyl group include
2-cyclohexenecarbonyl. Preferable examples of C.sub.6-12 aromatic
carbonyl group include benzoyl, naphthoyl and nicotinoyl.
[0049] As the substituent in the substituted acyl group, mention is
made of, for example, C.sub.1-3 alkyl group, C.sub.1-3alkoxy group,
halogen atom (e.g. chlorine, fluorine, bromine, etc.), nitro group,
hydroxyl group and amino group.
[0050] As the substituted hydroxyl group in the optionally
substituted hydroxyl group, mention is made of, for example, alkoxy
group, cycloalkyloxy group, alkenyloxy group, cycloalkenyloxy
group, aralkyloxy group, acyloxy group and aryloxy group.
[0051] Preferable examples of the alkoxy group include C.sub.1-10
alkoxy groups such as methoxy, ethoxy, propoxy, isopropoxy, butoxy,
isobutoxy, sec.-butoxy, t.-butoxy, pentyloxy, isopentyloxy,
neopentyloxy, hexyloxy, heptyloxy and nonyloxy. Preferable examples
of the cycloalkyloxy group include C.sub.3-10 cycloalkyloxy groups
such as cyclobutoxy, cyclopentyloxy and cyclohexyloxy. Preferable
examples of the alkenyloxy group include C.sub.2-10 alkenyloxy
groups such as allyloxy, crotyloxy, 2-pentenyloxy and 3-hexenyloxy.
Preferable examples of the cycloalkenyloxy group include C.sub.3-10
cycloalkenyloxy groups such as 2-cyclopentenyloxy and
2-cyclohexenyloxy. Preferable examples of the aralkyloxy group
include C.sub.7-10 aryloxy groups such as phenyl-C.sub.1-4alkyloxy
(e.g. benzyloxy and phenethyloxy). Preferable examples of the
acyloxy group include C.sub.2-13 acyloxy group, more preferably
C.sub.2-4 alkanoyloxy groups (e.g. acetyloxy, propionyloxy,
butyryloxy and isobutyryloxy). Preferable examples of the aryloxy
group include C.sub.6-14 aryloxy groups such as phenoxy and
naphthyloxy. The aryloxy group may optionally have one or two
substituents such as halogen atom (e.g. chlorine, fluorine,
bromine). Examples of the substituted aryloxy group include
4-chlorophenoxy.
[0052] As the substituted thiol group in the optionally substituted
thiol group, mention is made of, alkylthio group, cycloalkylthio
group, alkenylthio group, cycloalkenylthio group, aralkylthio
group, acylthio group and arylthio group.
[0053] Preferable examples of the alkylthio group include
C.sub.1-10 alkylthio groups such as methylthio, ethylthio,
propylthio, isopropylthio, butylthio, isobutylthio, sec.-butylthio,
t.-butylthio, pentylthio, isopentylthio, neopentylthio, hexylthio,
heptylthio and nonylthio. Preferable examples of the cycloalkylthio
group include C.sub.3-10 cycloalkylthio groups such as
cyclobutylthio, cyclopentylthio and cyclohexylthio. Preferable
examples of the alkenylthio group include C.sub.2-10 alkenylthio
groups such as allylthio, crotylthio, 2-pentenylthio and
3-hexenylthio. Preferable examples of the cycloalkenylthio group
include C.sub.3-10 cycloalkenylthio groups such as
2-cyclopentenylthio and 2-cyclohexenylthio. Preferable examples of
the aralkylthio include C.sub.7-10 aralkylthio groups such as
phenyl-C.sub.1-4alkylthio (e.g. benzylthio and phenethylthio).
Preferable examples of the acylthio group include C.sub.2-13
acylthio group, more preferably C.sub.2-4 alkanoylthio groups (e.g.
acetylthio, propionylthio, butyrylthio and isobutyrylthio).
[0054] Preferable examples of the arylthio group include C.sub.6-14
arylthio groups such as phenylthio and naphthylthio. The arylthio
group may optionally have one or two substituents such as halogen
atom (e.g. chlorine, fluorine, bromine). Examples of the
substituted arylthio group include 4-chlorophenylthio.
[0055] As the optionally esterified carboxyl group, mention is made
of, for example, alkoxycarbonyl group, aralkyloxycarbonyl group and
aryloxycarbonyl group.
[0056] Preferable examples of the alkoxycarbonyl group include
C.sub.2-5 alkoxycarbonyl groups such as methoxycarbonyl,
ethoxycarbonyl, propoxycarbonyl and butoxycarbonyl. Preferable
examples of the aralkyloxycarbonyl group include C.sub.8-10
aralkyloxycarbonyl groups such as benzyloxycarbonyl. Preferable
examples of the aryloxycarbonyl group include C.sub.7-15
aryloxycarbonyl groups such as phenoxycarbonyl and
p-tolyloxycarbonyl.
[0057] Among the substituents on the hydrocarbon group and
heterocyclic group represented by R, C.sub.1-10 alkyl groups,
aromatic heterocyclic groups and C.sub.6-14 aryl groups are
preferable, and C.sub.1-3 alkyl, furyl, thienyl, phenyl and
naphthyl are especially preferable.
[0058] In the formula (I), substituents on the hydrocarbon group
and heterocyclic group which are represented by R, may, when they
are alicyclic hydrocarbon group, aryl group, aromatic heterocyclic
group or non-aromatic heterocyclic group, have one or more,
preferably 1 to 3, of suitable substituents respectively. Examples
of these substituents include C.sub.1-6 alkyl groups, C.sub.2-6
alkenyl groups, C.sub.2-6 alkynyl groups, C.sub.3-7 cycloalkyl
groups, C.sub.6-14 aryl groups, aromatic heterocyclic groups (e.g.
thienyl, furyl, pyridyl, oxazolyl and thiazolyl), non-aromatic
heterocyclic groups (e.g. tetrahydrofuryl, morpholino,
thiomorpholino, piperidino, pyrrolidino and piperazino), C.sub.7-9
aralkyl groups, amino group, N-mono-C.sub.1-4 alkylamino groups,
N,N-di-C.sub.1-4 alkylamino groups, C.sub.2-8 acylamino groups
(e.g. acetylamino, propionylamino and benzoylamino), amidino group,
C.sub.2-8 acyl group (e.g. C.sub.2-8 alkanoyl groups), carbamoyl
group, N-mono-C.sub.1-4 alkyl carbamoyl groups, N,N-di-C.sub.1-4
alkyl carbamoyl groups, sulfamoyl group, N-mono-C.sub.1-4 alkyl
sulfamoyl groups, N,N-di-C.sub.1-4 alkyl sulfamoyl groups, carboxyl
group, C.sub.2-8 alkoxycarbonyl groups, hydroxyl group, C.sub.1-4
alkoxy groups, C.sub.2-5 alkenyloxy groups, C.sub.3-7 cycloalkyloxy
groups, C.sub.7-9 aralkyloxy groups, C.sub.6-14 aryloxy groups,
mercapto group, C.sub.1-4 alkylthio groups, C.sub.7-9 aralkylthio
groups C.sub.6-14 arylthio groups, sulfo group, cyano group, azido
group, nitro group, nitroso group and halogen atom.
[0059] In the formula (I), R is preferably an optionally
substituted heterocyclic group. R is more preferably pyridyl,
oxazolyl or thiazolyl group which is optionally substituted by 1 to
3 substituents selected from C.sub.1-3 alkyl group, furyl group,
thienyl group, phenyl group and naphthyl group.
[0060] R' in the formula (II) has the same definition as R except
that R' does not represent benzopyranyl group when m and n are O; X
represents CH; A represents a bond; Q represents sulfur atom;
R.sup.1, L and M represent hydrogen atom; and ring E does not have
further substituents.
[0061] In the formulae (I) and (II), Y represents --CO--,
--CH(OH)-- or --NR-- (wherein R.sup.3 represents an optionally
substituted alkyl group), preferably --CH(OH)-- or --NR.sup.3--. As
the alkyl group in the optionally substituted alkyl group
represented by R.sup.3, mention is made of, for example, C.sub.1-4
alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl,
isobutyl, sec.-butyl and t.-butyl. Examples of the substituents
include halogen (e.g., fluorine, chlorine, bromine and iodine),
C.sub.1-4 alkoxy groups (e.g. methoxy, ethoxy, propoxy, butoxy,
isobutoxy, sec.-butoxy and t.-butoxy), hydroxyl group, nitro group
and C.sub.1-4 acyl groups (e.g. formyl, acetyl and propionyl).
[0062] The symbol m is 0 or 1, preferably 0.
[0063] The symbol n is 0, 1 or 2, preferably 0 or 1.
[0064] X represents CH or N, preferably CH.
[0065] In the formulae (I) and (II), A represents a bond or a
C.sub.1-7 divalent aliphatic hydrocarbon group. The aliphatic
hydrocarbon group may be straight-chain or branched, and saturated
or unsaturated. Specific examples of the aliphatic hydrocarbon
group include saturated ones [e.g. --CH.sub.2--, --CH(CH.sub.3)--,
--(CH.sub.2).sub.2--, --CH(C.sub.2H.sub.5)--, --(CH.sub.2).sub.3--,
--(CH.sub.2).sub.4--, --(CH.sub.2).sub.5--, --(CH.sub.2).sub.6--
and --(CH.sub.2).sub.7--] and unsaturated ones [e.g. --CH.dbd.CH--,
--C(CH.sub.3).dbd.CH--, --CH.dbd.CH--CH.sub.2--,
--C(C.sub.2H.sub.5).dbd.CH--, --CH.sub.2--CH.dbd.CH--CH.sub.2--,
--CH.sub.2--CH.sub.2--CH.dbd.CH--CH.su- b.2--.
--CH.dbd.CH--CH.dbd.CH--CH.sub.2-- and
--CH.dbd.CH--CH.dbd.CH--CH.d- bd.CH--CH.sub.2--. A is preferably a
bond or C.sub.1-4 divalent aliphatic hydrocarbon groups, the
aliphatic hydrocarbon groups preferably being saturated. A is more
preferably a bond or --(CH.sub.2).sub.2--.
[0066] As the alkyl group represented by R.sup.1, substantially the
same one as the alkyl group in the above-mentioned R.sup.3. R.sup.1
is preferably hydrogen atom.
[0067] In the formulae (I) and (II), the partial formula: 4
[0068] Ring E has 1 to 4 substituents at any substitutable
positions. Examples of such substituents include alkyl group,
optionally substituted hydroxyl group, halogen atom, optionally
substituted acyl group and optionally substituted amino group.
These substituents have substantially the same meaning as those
described as substituents of the hydrocarbon group and heterocyclic
group represented by R.
[0069] Ring E, namely the partial formula: 5
[0070] wherein R.sup.2 represents hydrogen atom, an alkyl group, an
optionally substituted hydroxyl group, a halogen atom, an
optionally substituted acyl group, nitro group or an optionally
substituted amino group.
[0071] As the alkyl group, optionally substituted hydroxyl group,
halogen atom, optionally substituted acyl group and optionally
substituted amino group represented by R.sup.2, mention is made of
those described as substituents of the hydrocarbon group and
heterocyclic group represented by R. R.sup.2 is preferably hydrogen
atom, optionally substituted hydroxyl group or halogen atom, more
preferably hydrogen atom or optionally substituted hydroxyl group,
especially preferably hydrogen atom or C.sub.1-4 alkoxy groups.
[0072] In the formulae (I) and (II), L and M represent hydrogen
atom, or they may optionally be combined with each other to form a
bond. L and M are preferably hydrogen atom.
[0073] In the compounds wherein L and M are combined with each
other to form a bond, there exist (E)- and (Z)-isomers relative to
the double bond at the 5-position of the azolidinedione ring.
[0074] And, in the compounds wherein L and M respectively represent
hydrogen atom, there exist (R)- and (S)-optical isomers due to the
asymmetric carbon at the 5-position of the azolidinedione ring. The
compounds include these (R)- and (S)-optical isomers and racemic
isomers.
[0075] Preferable examples of the compounds represented by the
formula (I) or (II) includes those in which R is pyridyl, oxazolyl
or thiazolyl group optionally having 1 to 3 substituents selected
from C.sub.1-3 alkyl, furyl, thienyl, phenyl and naphthyl; m is 0;
n is 0 or 1; X is CH; A is a bond or --(CH.sub.2).sub.2--; R.sup.1
is hydrogen atom; ring E, namely the partial formula: 6
[0076] and R.sup.2 is hydrogen atom or C.sub.1-4 alkoxy group; and
L and M are both hydrogen atom.
[0077] Preferable examples of the compound represented by the
formula (I) include
[0078] (1) the compound represented by the formula (III) such as
5-[4-[2-(3-ethyl-2-pyridyl)ethoxy]benzyl]-2,4-thiazolidinedione;
5-[4-[2-(4-ethyl-2-pyridyl)ethoxy]-benzyl]-2,4-thiazolidinedione;
5-[4-[2-(5-ethyl-2-pyridyl)ethoxy]benzyl]-2,4-thiazolidinedione
(generic name: pioglitazone); and
5-[4-[2-(6-ethyl-2-pyridyl)-ethoxy]benzyl]-2,4-t-
hiazolidinedione;
[0079] (2)
(R)-(+)-5-[3-[4-[2-(2-furyl)-5-methyl-4-oxazolylmethoxy]-3-meth-
oxyphenyl]propyl]-2,4-oxazolidinedione; and
[0080] (3)
5-[[4-[(3,4-dihydro-6-hydroxy-2,5,7,8-tetramethyl-2H-1-benzopyr-
an-2-yl)methoxy]phenyl]methyl]-2,4-thiazolidinedione (generic name:
troglitazone/CS-045).
[0081] The compound represented by the formula (I) is especially
preferably pioglitazone.
[0082] The compound represented by the formula (II) is preferably
the compound represented by the formula (III) and
(R)-(+)-5-[3-[4-[2-(2-furyl-
)-5-methyl-4-oxazolylmethoxy]-3-methoxyphenyl]propyl]-2,4-oxazolidinedione-
, more preferably pioglitazone.
[0083] The pharmacologically acceptable salt of the compound
represented by the formula (I) or (II) are exemplified by salts
with inorganic bases, salts with organic bases, salts with
inorganic acids, salts with organic acids, and salts with basic or
acidic amino acids.
[0084] Preferable examples of salts with inorganic bases include
salts with alkali metals such as sodium, potassium, etc., salts
with alkaline earth metals such as calcium, magnesium, etc., and
salts with aluminum, ammonium, etc.
[0085] Preferable examples of salts with organic bases include
salts with trimethylamine, triethylamine, pyridine, picoline,
ethanolamine, diethanolamine, triethanolamine, dicyclohexylamine,
N,N-dibenzylethylenediamine, etc.
[0086] Preferable examples of salts with inorganic acids include
salts with hydrochloric acid, hydrobromic acid, nitric acid,
sulfuric acid, phosphoric acid, etc.
[0087] Preferable examples of salts with organic acids include
salts with formic acid, acetic acid, trifluoroacetic acid, fumaric
acid, oxalic acid, tartaric acid, maleic acid, citric acid,
succinic acid, malic acid, methanesulfonic acid, benzenesulfonic
acid, p-toluenesulfonic acid, etc.
[0088] Preferable examples of salts with basic amino acids include
salts with arginine, lysine, ornithine, etc., and preferable
examples of salts with acidic amino acids include salts with
aspartic acid, glutamic acid, etc.
[0089] The pharmacologically acceptable salt of the compound
represented by the formula (III) is preferably a salt with an
inorganic acid, more preferably a salt with hydrochloric acid.
Especially, pioglitazone is preferably used in the form of salt
with hydrochloric acid.
[0090] The compounds represented by the formula (I) or (II) or a
salt thereof can be produced in accordance with, for example,
methods described in JPA S55(1980)-22636(EP-A 8203), JPA
S60(1985)-208980(EP-A 155845), JPA S61(1986)-286376(EP-A 208420),
JPA S61(1986)-85372(EP-A 177353), JPA S61(1986)-267580(EP-A
193256), JPA H5(1993)-86057(WO 92/18501), JPA H7(1995)-82269(EP-A
605228), JPA H7(1995)-101945(EP-A 612743), EP-A. 643050, EP-A
710659, etc. or methods analogous thereto.
[0091] Insulin sensitivity enhancers include
5-[[3,4-dihydro-2-(phenylmeth-
yl)-2H-1-benzopyran-6-yl]methyl]-2,4-thiazolidinedione (generic
name: englitazone) or its sodium salt;
[0092]
5-[[4-[3-(5-methyl-2-phenyl-4-oxazolyl)-1-oxopropyl]phenyl]methyl]--
2,4-thiazolidinedione (generic name: darglitazone/CP-86325) or its
sodium salt;
[0093]
5-[2-(5-methyl-2-phenyl-4-oxazolylmethyl)benzofuran-5-ylmethyl]-2,4-
-oxazolidinedione (CP-92768);
[0094] 5-(2-naphthalenylsulfonyl)-2,4-thiazolidinedione
(AY-31637);
[0095] 4-[(2-naphthalenyl)methyl]-3H-1,2,3,5-oxathiadiazol-2-oxide
(AY-30711); and
[0096]
5-[[4-[2-(methyl-2-pyridylamino)ethoxy]phenyl]-methyl]2,4-thiazolin-
edione (BRL-49653), etc. in addition to compounds mentioned
hereinbefore.
[0097] In the present invention, examples of the drug which is used
in combination with the above-mentioned insulin sensitivity
enhancer include an .alpha.-glucosidase inhibitor, an aldose
reductase inhibitor, a biguanide, a statin compound, a squalene
synthesis inhibitor, a fibrate compound, a LDL catabolism enhancer
and an angiotensin converting enzyme inhibitor.
[0098] .alpha.-Glucosidase inhibitors are drugs which inhibit
digestive enzymes such as amylase, maltase, .alpha.-dextrinase,
sucrase, etc. to retard digestion of starch and sugars. Examples of
the .alpha.-glucosidase inhibitors include acarbose,
N-(1,3-dihydroxy-2-propy- l)valiolamine (generic name; voglibose),
miglitol, etc. with preferance given to voglibose.
[0099] Aldose reductase inhibitors are drugs which inhibit the
first-stage rate-limiting enzyme in the polyol pathway to prevent
or arrest diabetic complications. In the hyperglycemic state of
diabetes, the utilization of glucose in the polyol pathway is
increased and the excess sorbitol accumulated intracellularly as a
consequence acts as a tissue toxin and hence evokes the onset of
complications such as diabetic neuropathy, retinopathy, and
nephropathy. Examples of the aldose reductase inhibitors include
tolurestat; epalrestat; 3,4-dihydro-2,8-diisopropyl-3-thioxo-2H-1-
,4-benzoxazine-4-acetic acid;
2,7-difluoro-spiro(9H-fluorene-9,4'-imidazol- idine)-2',5'-dione
(generic name: imirestat);
[0100]
3-[(4-bromo-2-fluorophenyl)methyl]-7-chloro-3,4-dihydro-2,4-dioxo-1-
(2H)-quinazoline acetic acid (generic name: zenarestat);
[0101]
6-fluoro-2,3-dihydro-2',5'-dioxo-spiro[4H-1-benzopyran-4,4'-imidazo-
lidine]-2-carboxamide (SNK-860);
[0102] zopolrestat; sorbinil; and
[0103] 1-[(3-bromo-2-benzofuranyl)sulfonyl]-2,4-imidazolidinedione
(M-16209), etc.
[0104] Biguanides are drugs having actions of stimulation of
anaerobic glycolysis, increase of the sensitivity to insulin in the
peripheral tissues, inhibition of glucose absorption from the
intestine, suppression of hepatic gluconeogenesis, and inhibition
of fatty acid oxidation. Examples of the biguanides include
phenformin, metformin, buformin etc.
[0105] Statin compounds are drugs having actions of lowering-blood
cholesterol levels by inhibiting hydroxymethylglutalyl CoA
(HMG-CoA) reductase. Examples of the statin compounds include
pravastatin and its sodium salt, simvastatin, lovastatin,
atorvastatin, fluvastatin, etc.
[0106] Squalene synthesis inhibitors are drugs having actions of
lowering blood cholesterol levels by inhibiting synthesis of
squalene. Examples of the squalene synthesis inhibitors include
(S)-.alpha.-[Bis[2,2-dimethyl-1-
-oxopropoxy)methoxy]phosphinyl]-3-phenoxybenzenebutanesulfonic
acid, mono potassium salt (BMS-188494).
[0107] Fibrate compounds are drugs having actions of lowering blood
cholesterol levels by inhibiting synthesis and secretion of
triglycerides in liver and activating a lipoprotein lipase.
[0108] Examples of the fibrate compounds include bezafibrate,
beclobrate, binifibrate, ciplofibrate, clinofibrate, clofibrate,
clofibric acid, etofibrate, fenofibrate, gemfibrozil, nicofibrate,
pirifibrate, ronifibrate, simfibrate, theofibrate, etc.
[0109] LDL catabolism enhancers are drugs having actions of
lowering blood cholesterol levels by increasing the number of LDL
(low-density lipoprotein) receptors.
[0110] Examples of the LDL catabolism enhancers include the
compound which is described in JPA H7(1995)-316144 and represented
by the formula: 7
[0111] wherein R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are the same
or different, and represent hydrogen atom, a halogen atom, a lower
alkyl group or a lower alkoxy group; r is 0-2; s is 2-4; p is 1-2;
or a salt thereof; specifically
N-[2-[4-bis(4-fluorophenyl)methyl-1-piperazinyl]eth-
yl]-7,7-diphenyl-2,4,6-heptatrienic acid amide, etc.
[0112] The above-mentioned statin compounds, squalene synthesis
inhibitors, fibrate compounds and LDL, catabolism enhancers can be
substituted with other drugs having the property to lower blood
cholesterol and triglyceride levels. Examples of these drugs
include nicotinic acid derivatives such as nicomol and niceritrol;
antioxidants such as probucol; and ion-exchange resins such as
colestyramin.
[0113] Angiotensin converting enzyme inhibitors are drugs having
actions of partially lowering blood glucose levels as well as
lowering blood pressure by inhibiting angiotensin converting
enzymes. Examples of the angiotensin converting enzyme inhibitors
include captopril, enalapril, alacepril, delapril, ramipril,
lisinopril, imidapril, benazepril, ceronapril, cilazapril,
enalaprilat, fosinopril, moveltopril, perindopril, quinapril,
spirapril, temocapril, trandolapril, etc.
[0114] In the present invention, especially preferred is the
pharmaceutical composition which comprises an insulin sensitivity
enhancer in combination with an .alpha.-glucosidase inhibitor. The
insulin sensitivity enhancer is especially preferably pioglitazone,
and the .alpha.-glucosidase inhibitor is especially preferably
voglibose.
[0115] In the present invention, examples of the drug which is used
in combination with the compound represented by the formula (II) or
a pharmacologically acceptable salt thereof include an insulin
secretion enhancer and/or an insulin preparation.
[0116] Insulin secretion enhancers are drugs having the property to
promote secretion of insulin from pancreatic .beta. cells. Examples
of the insulin secretion enhancers include sulfonylureas (SU). The
sulfonylureas (SU) are drugs which promote secretion of insulin
from pancreatic .beta. cells by transmitting signals of insulin
secretion via SU receptors in the cell membranes. Examples of the
SU include tolbutamide; chlorpropamide; tolazamide; acetohexamide;
4-chloro-N-[(1-pyrolidinylamino)carbonyl]-benzenesulfonamide
(generic name: glycopyramide) or its ammonium salt; glibenclamide
(glyburide); gliclazide; 1-butyl-3-metanilylurea; carbutamide;
glibonuride; glipizide; gliquidone; glisoxepid; glybuthiazole;
glibuzole; glyhexamide; glymidine; glypinamide; phenbutamide;
tolcyclamide, etc.
[0117] Insulin secretion enhancers include
N-[[4-(1-methlylethyl)cyclohexy- l)carbonyl]-D-phenylalanine
(AY-4166); calcium (2S)-2-benzyl-3-(cis-hexahy-
dro-2-isoindolinylcarbonyl)propionate dihydrate (KAD-1229); and
glimepiride (Hoe 490), etc. in addition to compounds mentioned
hereinbefore. The insulin secretion enhancer is especially
preferably glibenclamide.
[0118] Examples of the insulin preparations include animal insulin
preparations typically extracted from bovine or porcine pancreas
and human insulin preparations synthesized by genetic engineering
techniques typically using Escherichia coli or yeasts. While
insulin preparations are available in a variety of types, e.g.
immediate-acting, bimodal-acting, intermediate-acting, and
long-acting, these types of preparations can be selectively
administered according to the patient's condition.
[0119] In the present invention, especially preferred is the
pharmaceutical composition which comprises the compound represented
by the formula (II) or a pharmacologically acceptable salt thereof
in combination with an insulin secretion enhancer. The compound
represented by the formula (II) or a pharmacologically acceptable
salt thereof is especially preferably pioglitazone, and the insulin
secretion enhancer is especially preferably glibenclamide.
[0120] The pharmaceutical composition comprising an insulin
sensitivity enhancer in combination with at least one member
selected from the group consisting of an .alpha.-glucosidase
inhibitor, an aldose reductase inhibitor, a biguanide, a statin
compound, a squalene synthesis inhibitor, a fibrate compound, a LDL
catabolism enhancer and an angiotensin converting enzyme inhibitor;
and the pharmaceutical composition comprising the compound
represented by the formula (II) or a pharmacologically acceptable
salt thereof in combination with an insulin secretion enhancer
and/or an insulin preparation, both provided in accordance with the
present invention, can be respectively put to use by mixing the
respective active components either all together or independently
with a physiologically acceptable carrier, excipient, binder,
diluent, etc. and administering the mixture or mixtures either
orally or non-orally as a pharmaceutical composition. When the
active components are formulated independently, the respective
formulations can be extemporaneously admixed using a diluent or the
like and administered or can be administered independently of each
other, either concurrently or at staggered times to the same
subject.
[0121] The dosage form for said pharmaceutical composition includes
such oral dosage forms as granules, powders, tablets, capsules,
syrups, emulsions, suspensions, etc. and such non-oral dosage forms
as injections (e.g. subcutaneous, intravenous, intramuscular and
intraperitoneal injections), drip infusions, external application
forms (e.g. nasal spray preparations, transdermal preparations,
ointments, etc.), and suppositories (e.g. rectal and vaginal
suppositories).
[0122] These dosage forms can be manufactured by the per se known
technique conventionally used in pharmaceutical procedures. The
specific manufacturing procedures are as follows.
[0123] To manufacture an oral dosage form, an excipient (e.g.
lactose, sucrose, starch, mannitol, etc.), a disintegrator (e.g.
calcium carbonate, carboxymethylcellulose calcium, etc.), a binder
(e.g. .alpha.-starch, gum arabic, carboxymethylcellulose,
polyvinylpyrrolidone, hydroxypropylcellulose, etc.), and a
lubricant (e.g. talc, magnesium stearate, polyethylene glycol 6000,
etc.), for instance, are added to the active component or
components and the resulting composition is compressed. Where
necessary, the compressed product is coated, by the per se known
technique, for masking the taste or for enderic dissolution or
sustained release. The coating material that can be used includes,
for instance, ethylcellulose, hydroxymethylcellulose;
polyoxyethylene glycol, cellulose acetate phthalate,
hydroxypropylmethylcellulose phthalate, and Eudragit (Rohm &
Haas, Germany, methacrylic-acrylic copolymer).
[0124] Injections can be manufactured typically by the following
procedure. The active component or components are dissolved,
suspended or emulsified in an aqueous vehicle (e.g. distilled
water, physiological saline, Ringer's solution, etc.) or an oily
vehicle (e.g. vegitable oil such as olive oil, sesame oil,
cottonseed oil, corn oil, etc. or propylene glycol) together with a
dispersant (e.g. Tween 80 (Atlas Powder, U.S.A.), HCO 60 (Nikko
Chemicals), polyethylene glycol, carboxymethylcellulose, sodium
alginate, etc.), a preservative. (e.g. methyl p-hydroxybenzoate,
propyl p-hydroxybenzoate, benzyl alcohol, chlorobutanol, phenol,
etc.), an isotonizing agent (e.g. sodium chloride, glycerol,
sorbitol, glucose, inverted sugar, etc.) and other additives. If
desired, a solubilizer (e.g. sodium salicylate, sodium acetate,
etc.), a stabilizer (e.g. human serum albumin), a soothing agent
(e.g. benzalkonium chloride, procaine hydrochloride, etc.) and
other additives can also be added.
[0125] A dosage form for external application can be manufactured
by processing the active component or components into a solid,
semi-solid or liquid composition. To manufacture a solid
composition, for instance, the active component or components,
either as they are or in admixture with an excipient (e.g. lactose,
mannitol, starch, microcrystalline cellulose, sucrose, etc.), a
thickener (e.g. natural gums, cellulose derivatives, acrylic
polymers, etc.), etc., are processed into powders. The liquid
composition can be manufactured in substantially the same manner as
the injections mentioned above. The semi-solid composition is
preferably provided in a hydrous or oily gel form or an ointment
form. These compositions may optionally contain a pH control agent
(e.g. carbonic acid, phosphoric acid, citric acid, hydrochloric
acid, sodium hydroxide, etc.), and a preservative (e.g.
p-hydroxybenzoic acid esters, chlorobutanol, benzalkonium chloride,
etc.), among other additives.
[0126] Suppositories can be manufactured by processing the active
component or components into an oily or aqueous composition,
whether solid, semi-solid or liquid. The oleaginous base that can
be used includes, for instance, higher fatty acid glycerides [e.g.
cacao butter, Witepsols (Dinamit-Nobel), etc.], medium-chain fatty
acids [e.g. Migriols (Dinamit-Nobel), etc.], vegetable oils (e.g.
sesame oil, soybean oil, cottonseed oil, etc.), etc. The
water-soluble base includes, for instance, polyethylene glycols,
propylene-glycol, etc. The hydrophilic base includes, for instance,
natural gums, cellulose derivatives, vinyl polymers, and acrylic
polymers, etc.
[0127] The pharmaceutical composition of the present invention is
low in toxicity and can be safely used in mammals (e.g. humans,
mice, rats, rabbits, dogs, cats, bovines, horses, swines,
monkeys).
[0128] The dosage of the pharmaceutical composition of the present
invention may be appropriately determined with reference to the
dosages recommended for the respective active components and can be
selected appropriately according to the recipient, the recipient's
age and body weight, current clinical status, administration time,
dosage form, method of administration, and combination of the
active components, among other factors. For example, the dosage of
the insulin sensitivity enhancer for an adult can be selected from
the clinical oral dose range of 0.01 to 10 mg/kg body weight
(preferably 0.05 to 10 mg/kg boday weight, more preferably 0.05 to
5 mg/kg body weight) or the clinical parenteral dose range of 0.005
to 10 mg/kg body weight (preferably 0.01 to 10 mg/kg body weight,
more preferably 0.01 to 1 mg/kg body weight). The other active
component or components having different modes of action for use in
combination can also be used in dose ranges selected by referring
to the respective recommended clinical dose ranges. The preferred
frequency of administration is 1 to 3 times a day.
[0129] The proportions of the active components in the
pharmaceutical composition of the present invention can be
appropriately selected according to the recipient, the recipient's
age and body weight, current clinical status, administration time,
dosage form, method of administration, and combination of active
components, among other factors. When, for example, the compound
represented by the formula (I) or a pharmacologically acceptable
salt thereof (e.g. pioglitazone) which is the insulin sensitivity
enhancer and voglibose which is an .alpha.-glucosidase inhibitor
are to be administered in combination to a human subject, voglibose
is used in a proportion of usually about 0.0001 to 0.2 weight parts
and preferably about 0.001 to 0.02 weight parts relative to 1
weight part of the compound or a salt thereof. When, for example,
the compound represented by the formula (II) or a pharmacologically
acceptable salt thereof and glibenclamide which is an insulin
secretion enhancer are to be administered in combination to a human
subject, glibenclamide is used in a proportion of usually about
0.002 to 5 weight parts and preferably about 0.025 to 0.5 weight
parts, relative to 1 weight part of the compound or a
pharmacologically acceptable salt thereof.
[0130] The pharmaceutical composition of the present invention
shows a marked synergistic effect compared with administration of
either active component alone. For example, compared with cases in
which each of these active components was administered to diabetic
Wistar fatty rats with genetical obsesity, administration of these
active components in combination resulted in marked improvements in
both hyperglycemia and reduced glucose tolerance. Thus, the
pharmaceutical composition of the present invention lowers blood
glucose in diabetics more effectively than it is the case with
administration of each component drug alone and, therefore, can be
used advantageously for the prophylaxis and treatment of diabetic
complications.
[0131] Furthermore, since the pharmaceutical composition of the
present invention develops sufficient efficacy with reduced doses
as compared with the administration of any one of the active
components alone, the side effects of the respective components
(e.g. gastrointestinal disorders such as diarrhea, etc.) can be
reduced.
[0132] The following working examples and experimental examples are
merely intended to illustrate the present invention in further
detail but should by no means be construed as defining the scope of
the invention.
[0133] The pharmaceutical composition of the present invention can
be prepared according to the following formulations.
WORKING EXAMPLE 1
[0134]
1 Capsules (1) Pioglitazone hydrochloride 30 mg (2) Voglibose 0.2
mg (3) Lactose 60 mg (4) Microcrystalline cellulose 79.8 mg (5)
Magnesium stearate 10 mg Total 180 mg
[0135] The whole amounts of (1), (2), (3) and (4) and half the
amount of (5) are mixed well and granulated in the conventional
manner. Then, the balance of (5) is added and, after mixing, the
whole composition is filled in a gelatin hard capsule shell.
WORKING EXAMPLE 2
[0136]
2 Tablets (1) Pioglitazone hydrochloride 10 mg (2) Glibenclamide
1.25 mg (3) Lactose 86.25 mg (4) Corn starch 20 mg (5) Polyethylene
glycol 2.5 mg (6) Hydroxypropylcellulose 4 mg (7) Carmellose
calcium 5.5 mg (8) Magnesium stearate 0.5 mg 130 mg (per
tablet)
[0137] The whole amounts of (1), (2), (3), (4), and (5), 2/3
amounts of (6) and (7), and 1/2 amount of (8) are mixed well and
granulated in the conventional manner. Then, the balances of (6),
(7) and (8) are added to the granules, which is mixed well and the
whole composition is compressed with a tablet machine. The adult
dosage is 3 tablets/day, to be taken in 1 to 3 divided doses.
WORKING EXAMPLE 3
[0138]
3 Capsules (1) Pioglitazone hydrochloride 10 mg (2) Epalrestat 50
mg (3) Lactose 55 mg (4) Microcrystalline cellulose 55 mg (5)
Magnesium stearate 10 mg Total 180 mg
[0139] The whole amounts of (1); (2), (3) and (4) and 1/2 amount of
(5) are mixed well and granulated in the conventional manner. Then,
the balance of (5) is added and the whole composition is filled in
gelatin capsule shell. The adult dosage is 3 capsules/day, to be
taken in 1 to 3 divided doses.
EXPERIMENTAL EXAMPLE 1
[0140] Effect of pioglitazone hydrochloride in combination with
.alpha.-glucosidase inhibitor in genetically obese and diabetic
Wistar fatty rats
[0141] Male Wistar fatty rats aged 14-19 weeks were divided into 4
groups of 5-6, and pioglitazone hydrochloride (1 mg/kg body
wt./day, p.o.) and/or voglibose (an .alpha.-glucosidase inhibitor)
(0.31 mg/kg body wt./day; administered by mixing in commercial diet
at a rate of 5 ppm) was administered for 14 days. The blood was
then collected from the tail vein and the plasma glucose and
hemoglobin A.sub.1 were determined by the enzymatic method (Encore
Chemical System, Baker) and using a commercial kit (NC-ROPET,
Nippon Chemiphar Co.), respectively. The results were expressed in
mean .+-. standard deviation for each group (n=5-6) and analyzed by
Dunnett's test, which are shown in Table 1. The 1% level of
significance was used.
4 TABLE 1 Plasma glucose Hemoglobin A.sub.1 Group (mg/dl) (%)
Control 345 .+-. 29 5.7 .+-. 0.4 Pioglitazone 215 .+-. 50* 5.2 .+-.
0.3 Voglibose 326 .+-. 46 6.0 .+-. 0.6 Pioglitazone + voglibose 114
.+-. 23* 4.5 .+-. 0.4* *P < 0.01 vs. control group
[0142] It is apparent from Table 1 that both the blood glucose and
hemoglobin A.sub.1 levels were remarkably lowered by combined
administration of pioglitazone and voglibose as compared with the
administration of either drug alone.
EXPERIMENTAL EXAMPLE 2
[0143] Effect of pioglitazone hydrochloride in combination with an
insulin secretion enhancer in genetically obese arid diabetic
Wistar fatty rats
[0144] Male Wistar fatty rats aged 13-14 weeks were divided into 4
groups of 5, and pioglitazone hydrochloride (3 mg/kg/day, p.o.)
and/or glibenclamide (an insulin secretion enhancer) (3 mg/kg/day,
p.o.) was administered for 7 days. Following an overnight fast, the
oral glucose loading test (2 g glucose/kg/5 ml, p.o.) was carried
out. Prior to glucose loading and 120 and 240 minutes after the
loading, blood was collected from the tail vein and the plasma
glucose was assayed by the enzymatic method (Encore Chemical
System, Baker). The results were expressed in mean .+-. SD for each
group (n=5) and analyzed by Dunnett's test, which are shown in
Table 2.
5 TABLE 2 Plasma glucose (mg/dl) Group 0 min. 120 min. 240 min.
Control 119 .+-. 9 241 .+-. 58 137 .+-. 10 Pioglitazone 102 .+-. 12
136 .+-. 17* 102 .+-. 9* Glibenclamide 118 .+-. 12 222 .+-. 61 106
.+-. 24* Pioglitazone + glibenclamide 108 .+-. 3 86 .+-. 10* 60
.+-. 5* *P < 0.01 vs. control group
[0145] It is apparent from Table 2 that the increase of blood sugar
following glucose loading was remarkably inhibited by the combined
administration of pioglitazone and glibenclamide as compared with
the administration of either drug alone.
[0146] The pharmaceutical composition of the present invention
shows a potent depressive effect on diabetic hyperglycemia and is
useful for prophylaxis and treatment of diabetes. Moreover, this
pharmaceutical composition is useful for prophylaxis and treatment
of diabetic complications such as diabetic neuropathy, nephropathy,
retinopathy, macroangiopathy, and osteopenia. In addition, by
appropriately selecting the kinds of component drugs,
administration route, dosage, etc. according to clinical status,
stable hypoglycemic efficacy in long-term therapy can be expected
with an extremely low risk of side effect.
* * * * *