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PMID |
Sentence |
1 |
10748204
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The MEF2A isoform is required for striated muscle-specific expression of the insulin-responsive GLUT4 glucose transporter.
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2 |
10748204
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Previously, we have demonstrated that an MEF2 consensus sequence located between -473/-464 in the human GLUT4 gene was essential for both tissue-specific and hormonal/metabolic regulation of GLUT4 expression (Thai, M.
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3 |
10748204
|
To identify the specific MEF2 isoform(s) responsible for GLUT4 expression, we studied the pattern of expression of the MEF2 isoforms in insulin-sensitive tissues.
|
4 |
10748204
|
Both heart and skeletal muscle were found to express the MEF2A, MEF2C, and MEF2D isoforms but not MEF2B.
|
5 |
10748204
|
However, only the MEF2A protein was selectively down-regulated in insulin-deficient diabetes.
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6 |
10748204
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Electrophoretic mobility shift assays revealed that nuclear extracts from diabetic animals had reduced binding to the MEF2 binding site compared with extracts from control or insulin-treated animals.
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7 |
10748204
|
However, addition of MEF2A to diabetic nuclear extracts fully restored binding activity to the MEF2 element.
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8 |
10748204
|
These data strongly suggest that the MEF2A-MEF2D heterodimer is selectively decreased in insulin-deficient diabetes and is responsible for hormonally regulated expression of the GLUT4 gene.
|
9 |
10748204
|
The MEF2A isoform is required for striated muscle-specific expression of the insulin-responsive GLUT4 glucose transporter.
|
10 |
10748204
|
Previously, we have demonstrated that an MEF2 consensus sequence located between -473/-464 in the human GLUT4 gene was essential for both tissue-specific and hormonal/metabolic regulation of GLUT4 expression (Thai, M.
|
11 |
10748204
|
To identify the specific MEF2 isoform(s) responsible for GLUT4 expression, we studied the pattern of expression of the MEF2 isoforms in insulin-sensitive tissues.
|
12 |
10748204
|
Both heart and skeletal muscle were found to express the MEF2A, MEF2C, and MEF2D isoforms but not MEF2B.
|
13 |
10748204
|
However, only the MEF2A protein was selectively down-regulated in insulin-deficient diabetes.
|
14 |
10748204
|
Electrophoretic mobility shift assays revealed that nuclear extracts from diabetic animals had reduced binding to the MEF2 binding site compared with extracts from control or insulin-treated animals.
|
15 |
10748204
|
However, addition of MEF2A to diabetic nuclear extracts fully restored binding activity to the MEF2 element.
|
16 |
10748204
|
These data strongly suggest that the MEF2A-MEF2D heterodimer is selectively decreased in insulin-deficient diabetes and is responsible for hormonally regulated expression of the GLUT4 gene.
|
17 |
10748204
|
The MEF2A isoform is required for striated muscle-specific expression of the insulin-responsive GLUT4 glucose transporter.
|
18 |
10748204
|
Previously, we have demonstrated that an MEF2 consensus sequence located between -473/-464 in the human GLUT4 gene was essential for both tissue-specific and hormonal/metabolic regulation of GLUT4 expression (Thai, M.
|
19 |
10748204
|
To identify the specific MEF2 isoform(s) responsible for GLUT4 expression, we studied the pattern of expression of the MEF2 isoforms in insulin-sensitive tissues.
|
20 |
10748204
|
Both heart and skeletal muscle were found to express the MEF2A, MEF2C, and MEF2D isoforms but not MEF2B.
|
21 |
10748204
|
However, only the MEF2A protein was selectively down-regulated in insulin-deficient diabetes.
|
22 |
10748204
|
Electrophoretic mobility shift assays revealed that nuclear extracts from diabetic animals had reduced binding to the MEF2 binding site compared with extracts from control or insulin-treated animals.
|
23 |
10748204
|
However, addition of MEF2A to diabetic nuclear extracts fully restored binding activity to the MEF2 element.
|
24 |
10748204
|
These data strongly suggest that the MEF2A-MEF2D heterodimer is selectively decreased in insulin-deficient diabetes and is responsible for hormonally regulated expression of the GLUT4 gene.
|
25 |
10748204
|
The MEF2A isoform is required for striated muscle-specific expression of the insulin-responsive GLUT4 glucose transporter.
|
26 |
10748204
|
Previously, we have demonstrated that an MEF2 consensus sequence located between -473/-464 in the human GLUT4 gene was essential for both tissue-specific and hormonal/metabolic regulation of GLUT4 expression (Thai, M.
|
27 |
10748204
|
To identify the specific MEF2 isoform(s) responsible for GLUT4 expression, we studied the pattern of expression of the MEF2 isoforms in insulin-sensitive tissues.
|
28 |
10748204
|
Both heart and skeletal muscle were found to express the MEF2A, MEF2C, and MEF2D isoforms but not MEF2B.
|
29 |
10748204
|
However, only the MEF2A protein was selectively down-regulated in insulin-deficient diabetes.
|
30 |
10748204
|
Electrophoretic mobility shift assays revealed that nuclear extracts from diabetic animals had reduced binding to the MEF2 binding site compared with extracts from control or insulin-treated animals.
|
31 |
10748204
|
However, addition of MEF2A to diabetic nuclear extracts fully restored binding activity to the MEF2 element.
|
32 |
10748204
|
These data strongly suggest that the MEF2A-MEF2D heterodimer is selectively decreased in insulin-deficient diabetes and is responsible for hormonally regulated expression of the GLUT4 gene.
|
33 |
11316766
|
The MEF2A and MEF2D isoforms are differentially regulated in muscle and adipose tissue during states of insulin deficiency.
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34 |
11316766
|
Previously we have demonstrated that striated muscle GLUT4 gene expression decreased following streptozotocin-induced diabetes due to a loss of MEF2A transcription factor expression without any significant effect on the MEF2D isoform (Mora, S. and J.
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35 |
11316766
|
However, addition of in vitro synthesized MEF2A to adipose nuclear extracts results in the formation of the expected MEF2/DNA complex.
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36 |
11316766
|
Furthermore, in vivo overexpression of MEF2A selectively in adipose tissue did not affect GLUT4 or MEF2D expression and was not sufficient to prevent GLUT4 down-regulation that occurred in insulin-deficient states.
|
37 |
11316766
|
The MEF2A and MEF2D isoforms are differentially regulated in muscle and adipose tissue during states of insulin deficiency.
|
38 |
11316766
|
Previously we have demonstrated that striated muscle GLUT4 gene expression decreased following streptozotocin-induced diabetes due to a loss of MEF2A transcription factor expression without any significant effect on the MEF2D isoform (Mora, S. and J.
|
39 |
11316766
|
However, addition of in vitro synthesized MEF2A to adipose nuclear extracts results in the formation of the expected MEF2/DNA complex.
|
40 |
11316766
|
Furthermore, in vivo overexpression of MEF2A selectively in adipose tissue did not affect GLUT4 or MEF2D expression and was not sufficient to prevent GLUT4 down-regulation that occurred in insulin-deficient states.
|
41 |
11316766
|
The MEF2A and MEF2D isoforms are differentially regulated in muscle and adipose tissue during states of insulin deficiency.
|
42 |
11316766
|
Previously we have demonstrated that striated muscle GLUT4 gene expression decreased following streptozotocin-induced diabetes due to a loss of MEF2A transcription factor expression without any significant effect on the MEF2D isoform (Mora, S. and J.
|
43 |
11316766
|
However, addition of in vitro synthesized MEF2A to adipose nuclear extracts results in the formation of the expected MEF2/DNA complex.
|
44 |
11316766
|
Furthermore, in vivo overexpression of MEF2A selectively in adipose tissue did not affect GLUT4 or MEF2D expression and was not sufficient to prevent GLUT4 down-regulation that occurred in insulin-deficient states.
|
45 |
11316766
|
The MEF2A and MEF2D isoforms are differentially regulated in muscle and adipose tissue during states of insulin deficiency.
|
46 |
11316766
|
Previously we have demonstrated that striated muscle GLUT4 gene expression decreased following streptozotocin-induced diabetes due to a loss of MEF2A transcription factor expression without any significant effect on the MEF2D isoform (Mora, S. and J.
|
47 |
11316766
|
However, addition of in vitro synthesized MEF2A to adipose nuclear extracts results in the formation of the expected MEF2/DNA complex.
|
48 |
11316766
|
Furthermore, in vivo overexpression of MEF2A selectively in adipose tissue did not affect GLUT4 or MEF2D expression and was not sufficient to prevent GLUT4 down-regulation that occurred in insulin-deficient states.
|
49 |
12097321
|
The Krüppel-like factor KLF15 regulates the insulin-sensitive glucose transporter GLUT4.
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50 |
12097321
|
GLUT4 is the main insulin-responsive glucose transporter and is expressed predominantly in muscle and adipose tissues.
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51 |
12097321
|
This effect is specific to KLF15 as overexpression of two other Krüppel-like factors, KLF2/LKLF and KLF4/GKLF, did not induce GLUT4 expression.
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52 |
12097321
|
In co-transfection assays, KLF15 and MEF2A, a known activator of GLUT4, synergistically activates the GLUT4 promoter.
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53 |
15734836
|
Myocyte enhancer factor 2A (MEF2A) is a transcription factor that is involved in the regulation of GLUT4 expression.
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54 |
15734836
|
GLUT4 protein was increased approximately 80%, GLUT4 mRNA was increased approximately 2.5-fold, MEF2A protein was increased twofold, and hexokinase II protein was increased approximately 2.5-fold 18 h after the last exercise bout.
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55 |
15734836
|
The cyclosporin treatment completely inhibited calcineurin activity but did not affect the adaptive increases in GLUT4, MEF2A, or hexokinase expression.
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56 |
15734836
|
Myocyte enhancer factor 2A (MEF2A) is a transcription factor that is involved in the regulation of GLUT4 expression.
|
57 |
15734836
|
GLUT4 protein was increased approximately 80%, GLUT4 mRNA was increased approximately 2.5-fold, MEF2A protein was increased twofold, and hexokinase II protein was increased approximately 2.5-fold 18 h after the last exercise bout.
|
58 |
15734836
|
The cyclosporin treatment completely inhibited calcineurin activity but did not affect the adaptive increases in GLUT4, MEF2A, or hexokinase expression.
|
59 |
15734836
|
Myocyte enhancer factor 2A (MEF2A) is a transcription factor that is involved in the regulation of GLUT4 expression.
|
60 |
15734836
|
GLUT4 protein was increased approximately 80%, GLUT4 mRNA was increased approximately 2.5-fold, MEF2A protein was increased twofold, and hexokinase II protein was increased approximately 2.5-fold 18 h after the last exercise bout.
|
61 |
15734836
|
The cyclosporin treatment completely inhibited calcineurin activity but did not affect the adaptive increases in GLUT4, MEF2A, or hexokinase expression.
|
62 |
15834131
|
Despite a location between the p38 MAPK docking domain and Thr phosphoacceptors of MEF2A and MEF2C, inclusion of beta does not influence responses of these factors to this signaling pathway.
|
63 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
64 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
65 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
66 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
67 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
68 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
69 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
70 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
71 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
72 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
73 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
74 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
75 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
76 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
77 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
78 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
79 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
80 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
81 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
82 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
83 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
84 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
85 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
86 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
87 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
88 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
89 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
90 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
91 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
92 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
93 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
94 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
95 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
96 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
97 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
98 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
99 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
100 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
101 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
102 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
103 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
104 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
105 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
106 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
107 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
108 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
109 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
110 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
111 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
112 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
113 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
114 |
18222924
|
Nuclear respiratory factors NRF1 and NRF2 regulate the expression of nuclear genes encoding heme biosynthetic enzymes, proteins required for mitochondrial genome transcription and protein import, and numerous respiratory chain subunits.
|
115 |
18222924
|
Only two of the nuclear-encoded respiratory chain subunits have evolutionarily conserved tissue-specific forms: the cytochrome c oxidase (COX) subunits VIa and VIIa heart/muscle (H) and ubiquitous (L) isoforms.
|
116 |
18222924
|
We used genome comparisons to conclude that the promoter regions of COX6A(H) and COX7A(H) lack NRF sites but have conserved myocyte enhancer factor 2 (MEF2) elements.
|
117 |
18222924
|
We show that MEF2A mRNA is induced with forced expression of NRF1 and that the MEF2A 5'-regulatory region contains an evolutionarily conserved canonical element that binds endogenous NRF1 in chromatin immunoprecipitation (ChIP) assays.
|
118 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
119 |
18222924
|
As there are four mammalian MEF2 isotypes, we used an isoform-specific antibody in ChIP to confirm MEF2A binding to the COX6A(H) promoter.
|
120 |
18222924
|
These findings support a role for MEF2A as an intermediary in coordinating respiratory chain subunit expression in heart and muscle through a NRF1 --> MEF2A --> COX(H) transcriptional cascade.
|
121 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
122 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
123 |
18413674
|
We investigated the role of transcriptional coactivator p300 and its interaction with myocyte enhancer factor 2 (MEF2) in diabetes-induced cardiomyocyte hypertrophy.
|
124 |
18413674
|
Cardiomyocytes were analyzed with respect to their size. mRNA expression of p300, MEF2A, MEF2C, atrial natriuretic polypeptide (ANP), brain natriuretic polypeptide (BNP), angiotensinogen (ANG), cAMP-responsive element binding protein-binding protein (CBP), and protein analysis of MEF2 were done with or without p300 blockade.
|
125 |
18413674
|
The results were that cardiomyocytes, exposed to 25 mM glucose for 48 h, showed cellular hypertrophy and augmented mRNA expression of ANP, BNP, and ANG, molecular markers of cardiac hypertrophy.
|
126 |
18413674
|
Glucose caused a duration-dependent increase of mRNA and protein expression in MEF2A and MEF2C and transcriptional coactivator p300.
|
127 |
18413674
|
Similarly, ANP, BNP, and ANG mRNA expression was significantly higher in the hearts of diabetic rats compared with the controls, in association with increased p300, MEF2A, and MEF2C expression.
|
128 |
18413674
|
We investigated the role of transcriptional coactivator p300 and its interaction with myocyte enhancer factor 2 (MEF2) in diabetes-induced cardiomyocyte hypertrophy.
|
129 |
18413674
|
Cardiomyocytes were analyzed with respect to their size. mRNA expression of p300, MEF2A, MEF2C, atrial natriuretic polypeptide (ANP), brain natriuretic polypeptide (BNP), angiotensinogen (ANG), cAMP-responsive element binding protein-binding protein (CBP), and protein analysis of MEF2 were done with or without p300 blockade.
|
130 |
18413674
|
The results were that cardiomyocytes, exposed to 25 mM glucose for 48 h, showed cellular hypertrophy and augmented mRNA expression of ANP, BNP, and ANG, molecular markers of cardiac hypertrophy.
|
131 |
18413674
|
Glucose caused a duration-dependent increase of mRNA and protein expression in MEF2A and MEF2C and transcriptional coactivator p300.
|
132 |
18413674
|
Similarly, ANP, BNP, and ANG mRNA expression was significantly higher in the hearts of diabetic rats compared with the controls, in association with increased p300, MEF2A, and MEF2C expression.
|
133 |
18413674
|
We investigated the role of transcriptional coactivator p300 and its interaction with myocyte enhancer factor 2 (MEF2) in diabetes-induced cardiomyocyte hypertrophy.
|
134 |
18413674
|
Cardiomyocytes were analyzed with respect to their size. mRNA expression of p300, MEF2A, MEF2C, atrial natriuretic polypeptide (ANP), brain natriuretic polypeptide (BNP), angiotensinogen (ANG), cAMP-responsive element binding protein-binding protein (CBP), and protein analysis of MEF2 were done with or without p300 blockade.
|
135 |
18413674
|
The results were that cardiomyocytes, exposed to 25 mM glucose for 48 h, showed cellular hypertrophy and augmented mRNA expression of ANP, BNP, and ANG, molecular markers of cardiac hypertrophy.
|
136 |
18413674
|
Glucose caused a duration-dependent increase of mRNA and protein expression in MEF2A and MEF2C and transcriptional coactivator p300.
|
137 |
18413674
|
Similarly, ANP, BNP, and ANG mRNA expression was significantly higher in the hearts of diabetic rats compared with the controls, in association with increased p300, MEF2A, and MEF2C expression.
|
138 |
19233164
|
CPT-1B is induced by the transcription factors peroxisome proliferator activated receptor-alpha (PPAR-alpha) and PPAR-gamma-coactivator 1alpha (PGC1alpha) and repressed by upstream stimulatory factor-2 (USF-2).
|
139 |
19233164
|
We therefore hypothesized that metoprolol represses CPT-1B by increasing USF-2-mediated repression of PGC1alpha.
|
140 |
19233164
|
After termination, the expression of CPT-1 isoforms, PPAR-alpha, PGC1alpha USF-1 and USF-2, as well as downstream targets were measured.
|
141 |
19233164
|
Binding of PPAR-alpha, PGC1alpha and USF-2 to PGC1alpha was measured using coimmunoprecipitation.
|
142 |
19233164
|
The occupation of PPAR-alpha and MEF-2A consensus sites in the CPT-1B promoter was measured using chromatin immunoprecipitation assays.
|
143 |
19233164
|
The expression of USF-2 was increased by metoprolol in both control and diabetic hearts, but the association of USF-2 with PGC1alpha was increased by metoprolol only in diabetic hearts.
|
144 |
19233164
|
Metoprolol prevented the increase in PGC1alpha occupation of the CPT-1B promoter region observed in the diabetic heart without affecting PPAR-alpha occupation.
|
145 |
19233164
|
Metoprolol decreases CPT-1B expression by decreasing PGC1alpha-mediated coactivation of PPAR-alpha and MEF-2A.
|
146 |
19233164
|
This is associated with increased PGC1alpha/ USF-2 binding, suggesting that USF-2 mediates the metoprolol-induced repression of PGC1alpha.
|
147 |
19233164
|
CPT-1B is induced by the transcription factors peroxisome proliferator activated receptor-alpha (PPAR-alpha) and PPAR-gamma-coactivator 1alpha (PGC1alpha) and repressed by upstream stimulatory factor-2 (USF-2).
|
148 |
19233164
|
We therefore hypothesized that metoprolol represses CPT-1B by increasing USF-2-mediated repression of PGC1alpha.
|
149 |
19233164
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After termination, the expression of CPT-1 isoforms, PPAR-alpha, PGC1alpha USF-1 and USF-2, as well as downstream targets were measured.
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150 |
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Binding of PPAR-alpha, PGC1alpha and USF-2 to PGC1alpha was measured using coimmunoprecipitation.
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151 |
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The occupation of PPAR-alpha and MEF-2A consensus sites in the CPT-1B promoter was measured using chromatin immunoprecipitation assays.
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152 |
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The expression of USF-2 was increased by metoprolol in both control and diabetic hearts, but the association of USF-2 with PGC1alpha was increased by metoprolol only in diabetic hearts.
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153 |
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Metoprolol prevented the increase in PGC1alpha occupation of the CPT-1B promoter region observed in the diabetic heart without affecting PPAR-alpha occupation.
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154 |
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Metoprolol decreases CPT-1B expression by decreasing PGC1alpha-mediated coactivation of PPAR-alpha and MEF-2A.
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155 |
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This is associated with increased PGC1alpha/ USF-2 binding, suggesting that USF-2 mediates the metoprolol-induced repression of PGC1alpha.
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156 |
23028138
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We found differential DNA methylation of genes in biological pathways including mitogen-activated protein kinase (MAPK), insulin, and calcium signaling (P ≤ 0.007) and of individual genes with known function in muscle, including MAPK1, MYO18B, HOXC6, and the AMP-activated protein kinase subunit PRKAB1 in skeletal muscle of FH(+) compared with FH(-) men.
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157 |
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DNA methylation of genes in retinol metabolism and calcium signaling pathways (P < 3 × 10(-6)) and with known functions in muscle and T2D including MEF2A, RUNX1, NDUFC2, and THADA decreased after exercise.
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158 |
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In addition, both expression and methylation of several genes, i.e., ADIPOR1, BDKRB2, and TRIB1, changed after exercise.
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