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PMID |
Sentence |
1 |
12832613
|
Coordinated reduction of genes of oxidative metabolism in humans with insulin resistance and diabetes: Potential role of PGC1 and NRF1.
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2 |
12832613
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We demonstrate that insulin resistance and DM associate with reduced expression of multiple nuclear respiratory factor-1 (NRF-1)-dependent genes encoding key enzymes in oxidative metabolism and mitochondrial function.
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3 |
12832613
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Although NRF-1 expression is decreased only in diabetic subjects, expression of both PPAR gamma coactivator 1-alpha and-beta (PGC1-alpha/PPARGC1 and PGC1-beta/PERC), coactivators of NRF-1 and PPAR gamma-dependent transcription, is decreased in both diabetic subjects and family history-positive nondiabetic subjects.
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4 |
12832613
|
Decreased PGC1 expression may be responsible for decreased expression of NRF-dependent genes, leading to the metabolic disturbances characteristic of insulin resistance and DM.
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5 |
12832613
|
Coordinated reduction of genes of oxidative metabolism in humans with insulin resistance and diabetes: Potential role of PGC1 and NRF1.
|
6 |
12832613
|
We demonstrate that insulin resistance and DM associate with reduced expression of multiple nuclear respiratory factor-1 (NRF-1)-dependent genes encoding key enzymes in oxidative metabolism and mitochondrial function.
|
7 |
12832613
|
Although NRF-1 expression is decreased only in diabetic subjects, expression of both PPAR gamma coactivator 1-alpha and-beta (PGC1-alpha/PPARGC1 and PGC1-beta/PERC), coactivators of NRF-1 and PPAR gamma-dependent transcription, is decreased in both diabetic subjects and family history-positive nondiabetic subjects.
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8 |
12832613
|
Decreased PGC1 expression may be responsible for decreased expression of NRF-dependent genes, leading to the metabolic disturbances characteristic of insulin resistance and DM.
|
9 |
12832613
|
Coordinated reduction of genes of oxidative metabolism in humans with insulin resistance and diabetes: Potential role of PGC1 and NRF1.
|
10 |
12832613
|
We demonstrate that insulin resistance and DM associate with reduced expression of multiple nuclear respiratory factor-1 (NRF-1)-dependent genes encoding key enzymes in oxidative metabolism and mitochondrial function.
|
11 |
12832613
|
Although NRF-1 expression is decreased only in diabetic subjects, expression of both PPAR gamma coactivator 1-alpha and-beta (PGC1-alpha/PPARGC1 and PGC1-beta/PERC), coactivators of NRF-1 and PPAR gamma-dependent transcription, is decreased in both diabetic subjects and family history-positive nondiabetic subjects.
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12 |
12832613
|
Decreased PGC1 expression may be responsible for decreased expression of NRF-dependent genes, leading to the metabolic disturbances characteristic of insulin resistance and DM.
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13 |
15294042
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Such adaptations are largely the result of a coordinated genetic response that increases mitochondrial proteins, fatty acid oxidation enzymes and the exercise- and insulin-stimulated glucose transporter GLUT4, and shifts the contractile and regulatory proteins to their more efficient isoforms.
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14 |
15294042
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The PPAR gamma co-activator (PGC) family of proteins have been identified as the central family of transcriptional co-activators for induction of mitochondrial biogenesis.
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15 |
15294042
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PGC-1 alpha is activated by exercise, and is sufficient to produce the endurance phenotype through direct interactions with NRF-1 and PPAR alpha, and potentially NRF-2.
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16 |
15479157
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The roles of Sp1, Sp3, USF1/USF2 and NRF-1 in the regulation and three-dimensional structure of the Fragile X mental retardation gene promoter.
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17 |
15479157
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We had previously shown that in mouse brain extracts two of these sites are bound by USF1/USF2 (upstream stimulatory factors 1 and 2) heterodimers and NRF-1 (nuclear respiratory factor-1).
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18 |
15479157
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In the present study, we show that Sp1 (specificity protein 1) and Sp3 are also strong positive regulators of FMR1 promoter activity.
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19 |
15479157
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We also show that, like Sp1 and E-box-binding proteins such as USF1 and USF2, NRF-1 causes DNA bending, in this case producing a bend of 57 degrees towards the major groove.
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20 |
15479157
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We can reconcile these observations with the positive effect of Sp1 and Sp3 if protein-induced bending acts, at least in part, to bring together distally spaced factors important for transcription initiation.
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21 |
15479157
|
The roles of Sp1, Sp3, USF1/USF2 and NRF-1 in the regulation and three-dimensional structure of the Fragile X mental retardation gene promoter.
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22 |
15479157
|
We had previously shown that in mouse brain extracts two of these sites are bound by USF1/USF2 (upstream stimulatory factors 1 and 2) heterodimers and NRF-1 (nuclear respiratory factor-1).
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23 |
15479157
|
In the present study, we show that Sp1 (specificity protein 1) and Sp3 are also strong positive regulators of FMR1 promoter activity.
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24 |
15479157
|
We also show that, like Sp1 and E-box-binding proteins such as USF1 and USF2, NRF-1 causes DNA bending, in this case producing a bend of 57 degrees towards the major groove.
|
25 |
15479157
|
We can reconcile these observations with the positive effect of Sp1 and Sp3 if protein-induced bending acts, at least in part, to bring together distally spaced factors important for transcription initiation.
|
26 |
15479157
|
The roles of Sp1, Sp3, USF1/USF2 and NRF-1 in the regulation and three-dimensional structure of the Fragile X mental retardation gene promoter.
|
27 |
15479157
|
We had previously shown that in mouse brain extracts two of these sites are bound by USF1/USF2 (upstream stimulatory factors 1 and 2) heterodimers and NRF-1 (nuclear respiratory factor-1).
|
28 |
15479157
|
In the present study, we show that Sp1 (specificity protein 1) and Sp3 are also strong positive regulators of FMR1 promoter activity.
|
29 |
15479157
|
We also show that, like Sp1 and E-box-binding proteins such as USF1 and USF2, NRF-1 causes DNA bending, in this case producing a bend of 57 degrees towards the major groove.
|
30 |
15479157
|
We can reconcile these observations with the positive effect of Sp1 and Sp3 if protein-induced bending acts, at least in part, to bring together distally spaced factors important for transcription initiation.
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31 |
16259958
|
Furthermore, expression of the mitochondrial biogenesis factors, nuclear respiratory factor-1 and mitochondrial transcription factor A, was significantly elevated in Hcy-treated cells.
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32 |
16326070
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Defective activation of the transcriptional coactivator PGC-1alpha may contribute to the gene expression pattern observed in diabetic and insulin-resistant skeletal muscle.
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33 |
16326070
|
We studied PPARGC1A (PGC-1alpha), PPARGC1B (PGC-1beta), NRF1, and a variety of mitochondrial DNA (mtDNA) and nuclear-encoded mitochondrial genes critical for oxidative phosphorylation in soleus muscle biopsies obtained from six healthy men and women before and after 5 weeks of local muscle inactivity.
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34 |
16326070
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Further, although diabetes patients are typically inactive, our analysis indicates that local muscle inactivity may not be expected to contribute to the decreased NRF1 and PGC-1beta expression noted in insulin-resistant and Type 2 diabetes patients, suggesting these changes may be more disease specific.
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35 |
16326070
|
Defective activation of the transcriptional coactivator PGC-1alpha may contribute to the gene expression pattern observed in diabetic and insulin-resistant skeletal muscle.
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36 |
16326070
|
We studied PPARGC1A (PGC-1alpha), PPARGC1B (PGC-1beta), NRF1, and a variety of mitochondrial DNA (mtDNA) and nuclear-encoded mitochondrial genes critical for oxidative phosphorylation in soleus muscle biopsies obtained from six healthy men and women before and after 5 weeks of local muscle inactivity.
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37 |
16326070
|
Further, although diabetes patients are typically inactive, our analysis indicates that local muscle inactivity may not be expected to contribute to the decreased NRF1 and PGC-1beta expression noted in insulin-resistant and Type 2 diabetes patients, suggesting these changes may be more disease specific.
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38 |
16380484
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Treatment with metformin and AICAR inhibited hyperglycemia-induced intracellular and mtROS production, stimulated AMP-activated protein kinase (AMPK) activity, and increased the expression of peroxisome proliferator-activated response-gamma coactivator-1alpha (PGC-1alpha) and manganese superoxide dismutase (MnSOD) mRNAs.
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39 |
16380484
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The dominant negative form of AMPKalpha1 diminished the effects of metformin and AICAR on these events, and an overexpression of PGC-1alpha completely blocked the hyperglycemia-induced mtROS production.
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40 |
16380484
|
In addition, metformin and AICAR increased the mRNA expression of nuclear respiratory factor-1 and mitochondrial DNA transcription factor A (mtTFA) and stimulated the mitochondrial proliferation.
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41 |
16644684
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Insulin increased phosphorylation of Akt and Akt substrate of 160 kDa (AS160) in a dose-dependent manner, with comparable responses between groups.
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42 |
16644684
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Skeletal muscle mRNA expression of peroxisome proliferator-activated receptor (PPAR) gamma coactivator (PGC)-1alpha, PGC-1beta, PPARdelta, nuclear respiratory factor-1, and uncoupling protein-3 was comparable between first-degree relatives and control subjects.
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43 |
16644684
|
In conclusion, the uncoupling of insulin action on Akt/AS160 signaling and glucose transport implicates defective GLUT4 trafficking as an early event in the pathogenesis of type 2 diabetes.
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44 |
16886907
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NF-Y, AP2, Nrf1 and Sp1 regulate the fragile X-related gene 2 (FXR2).
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45 |
16886907
|
The protein product of this gene, FMRP (fragile X mental retardation protein), is thought to be involved in the translational regulation of mRNAs important for learning and memory.
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46 |
16886907
|
Disruption of Fxr2 in mice produces learning and memory deficits, and Fmr1 and Fxr2 double-knockout mice have exaggerated impairments in certain neurobehavioral phenotypes relative to the single gene knockouts.
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47 |
16886907
|
This has led to the suggestion that FMR1 and FXR2 functionally overlap and that increasing the expression of FXR2P may ameliorate the symptoms of an FMRP deficiency.
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48 |
16886907
|
Interestingly, the region upstream of the FXR2 translation start site acts as a bidirectional promoter in rodents, driving transcription of an alternative transcript encoding the ABP (androgen-binding protein) [aABP (alternative ABP promoter)].
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49 |
16886907
|
Gel electrophoretic mobility-shift assays, chromatin immunoprecipitation studies and co-transfection experiments with plasmids expressing these transcription factors or dominant-negative versions of these factors showed that NF-YA (nuclear transcription factor Yalpha), AP2 (activator protein 2), Nrf1 (nuclear respiratory factor/alpha-Pal) and Sp1 (specificity protein 1) all bind to the FXR2 promoter both in vitro and in vivo and positively regulate the FXR2 promoter.
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50 |
16886907
|
NF-Y, AP2, Nrf1 and Sp1 regulate the fragile X-related gene 2 (FXR2).
|
51 |
16886907
|
The protein product of this gene, FMRP (fragile X mental retardation protein), is thought to be involved in the translational regulation of mRNAs important for learning and memory.
|
52 |
16886907
|
Disruption of Fxr2 in mice produces learning and memory deficits, and Fmr1 and Fxr2 double-knockout mice have exaggerated impairments in certain neurobehavioral phenotypes relative to the single gene knockouts.
|
53 |
16886907
|
This has led to the suggestion that FMR1 and FXR2 functionally overlap and that increasing the expression of FXR2P may ameliorate the symptoms of an FMRP deficiency.
|
54 |
16886907
|
Interestingly, the region upstream of the FXR2 translation start site acts as a bidirectional promoter in rodents, driving transcription of an alternative transcript encoding the ABP (androgen-binding protein) [aABP (alternative ABP promoter)].
|
55 |
16886907
|
Gel electrophoretic mobility-shift assays, chromatin immunoprecipitation studies and co-transfection experiments with plasmids expressing these transcription factors or dominant-negative versions of these factors showed that NF-YA (nuclear transcription factor Yalpha), AP2 (activator protein 2), Nrf1 (nuclear respiratory factor/alpha-Pal) and Sp1 (specificity protein 1) all bind to the FXR2 promoter both in vitro and in vivo and positively regulate the FXR2 promoter.
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56 |
17609253
|
For this purpose, we studied the oxidative phosphorylation system (OXPHOS) enzymatic activities as well as the expression of genes involved in the coordinated regulation of both mitochondrial and nuclear genome (PGC-1alpha, NRF-1, NRF-2alpha, mtSSB, and TFAM) and mitochondrial function (COX-IV, COX-I, and beta-ATPase) in rat embryos from control and streptozotocin-induced diabetic mothers.
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57 |
18074631
|
ERRalpha, NRF1 and NRF2 are key targets of the PGC1s in mitochondrial biogenesis.
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58 |
18074631
|
This includes genes encoding mitochondrial proteins like SOD2, but also includes cytoplasmic proteins such as catalase and GPX1.
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59 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
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60 |
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.
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61 |
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.
|
62 |
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.
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63 |
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.
|
64 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
65 |
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.
|
66 |
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.
|
67 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
68 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
69 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
70 |
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.
|
71 |
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.
|
72 |
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.
|
73 |
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.
|
74 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
75 |
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.
|
76 |
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.
|
77 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
78 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
79 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
80 |
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.
|
81 |
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.
|
82 |
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.
|
83 |
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.
|
84 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
85 |
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.
|
86 |
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.
|
87 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
88 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
89 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
90 |
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.
|
91 |
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.
|
92 |
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.
|
93 |
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.
|
94 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
95 |
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.
|
96 |
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.
|
97 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
98 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
99 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
100 |
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.
|
101 |
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.
|
102 |
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.
|
103 |
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.
|
104 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
105 |
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.
|
106 |
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.
|
107 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
108 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
109 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
110 |
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.
|
111 |
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.
|
112 |
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.
|
113 |
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.
|
114 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
115 |
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.
|
116 |
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.
|
117 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
118 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
119 |
18222924
|
Nuclear respiratory factor 1 controls myocyte enhancer factor 2A transcription to provide a mechanism for coordinate expression of respiratory chain subunits.
|
120 |
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.
|
121 |
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.
|
122 |
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.
|
123 |
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.
|
124 |
18222924
|
NRF1 regulates MEF2A promoter-reporters according to overexpression, RNA interference underexpression, and promoter element mutation studies.
|
125 |
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.
|
126 |
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.
|
127 |
18222924
|
MEF2A also bound the MEF2A and PPARGC1A promoters in ChIP, placing it within a feedback loop with PGC1alpha in controlling NRF1 activity.
|
128 |
18222924
|
Our findings also account for the previously described indirect regulation by NRF1 of other MEF2 targets in muscle such as GLUT4.
|
129 |
18269170
|
ERRalpha, NRF1 and NRF2 are key targets of the PGC1s in mitochondrial biogenesis.
|
130 |
18269170
|
This includes genes encoding mitochondrial proteins like SOD2, but also includes cytoplasmic proteins like catalase and GPX1.
|
131 |
19429820
|
In CAECs resveratrol increased mitochondrial mass and mitochondrial DNA content, upregulated protein expression of electron transport chain constituents, and induced mitochondrial biogenesis factors (proliferator-activated receptor-coactivator-1alpha, nuclear respiratory factor-1, mitochondrial transcription factor A).
|
132 |
19429820
|
Sirtuin 1 (SIRT1) was induced, and endothelial nitric oxide (NO) synthase (eNOS) was upregulated in a SIRT1-dependent manner.
|
133 |
19429820
|
We propose that SIRT1, via a pathway that involves the upregulation of eNOS, induces mitochondrial biogenesis.
|
134 |
19477471
|
Increased expression of peroxisome proliferator-activated receptor-gamma coactivator-1alpha, nuclear respiratory factor-1, cytochrome c, cytochrome c oxidase-4, and glucose transporter 4 by KRG treatment indicates that activated AMPK also enhanced mitochondrial biogenesis and glucose utilization in skeletal muscle.
|
135 |
19477471
|
Although these findings suggest that KRG is likely to have beneficial effects on the amelioration of insulin resistance and the prevention of T2DM through the activation of AMPK, further clinical studies are required to evaluate the use of KRG as a supplementary agent for T2DM.
|
136 |
20369014
|
The identified transcription factors include members of the CREB, NRF1 and PPAR family, among others, and represent regulatory targets for further experimental analysis.
|
137 |
20533901
|
PGC-1alpha (peroxisome-proliferator-activated receptor gamma co-activator-1alpha) is a co-transcriptional regulation factor that induces mitochondrial biogenesis by activating different transcription factors, including nuclear respiratory factor 1 and nuclear respiratory factor 2, which activate mitochondrial transcription factor A.
|
138 |
20816089
|
Here, we show that SIRT1 forms a complex with FOXO3a and NRF1 on the SIRT6 promoter and positively regulates expression of SIRT6, which, in turn, negatively regulates glycolysis, triglyceride synthesis, and fat metabolism by deacetylating histone H3 lysine 9 in the promoter of many genes involved in these processes.
|
139 |
20981161
|
Low-Frequency Electroacupuncture Improves Insulin Sensitivity in Obese Diabetic Mice through Activation of SIRT1/PGC-1α in Skeletal Muscle.
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140 |
20981161
|
EA was likewise observed to decrease free fatty acid levels in db/db mice; it increased protein expression in skeletal muscle Sirtuin 1 (SIRT1) and induced gene expression of peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), nuclear respiratory factor 1 (NRF1), and acyl-CoA oxidase (ACOX).
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141 |
20981161
|
These results indicated that EA offers a beneficial effect on insulin resistance in obese and diabetic db/db mice, at least partly, via stimulation of SIRT1/PGC-1α, thus resulting in improved insulin signal.
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142 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
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143 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
144 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
145 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
146 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
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147 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
148 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
|
149 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
150 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
151 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
152 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
|
153 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
154 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
|
155 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
156 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
157 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
158 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
|
159 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
160 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
|
161 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
162 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
163 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
164 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
|
165 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
166 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
|
167 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
168 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
169 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
170 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
|
171 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
172 |
21146886
|
Association between polymorphisms in RAPGEF1, TP53, NRF1 and type 2 diabetes in Chinese Han population.
|
173 |
21146886
|
The aim of the present study was to investigate the association between the polymorphisms of RAPGEF1, TP53 and NRF1 and the risk of type 2 diabetes in the Chinese Han population.
|
174 |
21146886
|
We genotyped rs11243444 (RAPGEF1), rs1042522 (TP53) and rs1882095 (NRF1) in a case-control study, including 273 type 2 diabetes and 247 healthy controls.
|
175 |
21146886
|
A significant association was found in a variant of TP53 (rs1042522, odd ratio (OR)=1.28, 95% confidence interval (CI)=1.00-1.64; P=0.046), whereas polymorphisms in RAPGEF1, NRF1 were not associated with the risk of type 2 diabetes.
|
176 |
21146886
|
Furthermore, a potential gene-gene interaction showed the odds of being affected with type 2 diabetes was 2.54 times greater in subjects with the TP53 (rs1042522) and RAPGEF1 (rs11243444) risk alleles than those without either (95% CI=1.34-4.81; P=0.004) and the NRF1 gene polymorphism reached significance when paired with TP53:(OR=3.87, 95% CI=1.87-8.40; P=0.0006).
|
177 |
21146886
|
We demonstrated that the polymorphism in TP53 (rs1042522) was associated with type 2 diabetes, and that potential interaction of TP53 (rs1042522) and RAPGEF1 (rs11243444), or NRF1 (rs1882095) increased the risk of type 2 diabetes.
|
178 |
21784897
|
IHG-1 promotes mitochondrial biogenesis by stabilizing PGC-1α.
|
179 |
21784897
|
IHG-1 overexpression increased mitochondrial mass and stabilized peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α).
|
180 |
21784897
|
Conversely, inhibition of IHG-1 expression decreased mitochondrial mass, downregulated mitochondrial proteins, and PGC-1α-regulated transcription factors, including nuclear respiratory factor 1 and mitochondrial transcription factor A (TFAM), and reduced activity of the TFAM promoter.
|
181 |
21784897
|
In the unilateral ureteral obstruction model, we observed higher PGC-1α protein expression and IHG-1 levels with fibrosis.
|
182 |
21784897
|
In a gene-expression database, we noted that renal biopsies of human diabetic nephropathy demonstrated higher expression of genes encoding key mitochondrial proteins, including cytochrome c and manganese superoxide dismutase, compared with control biopsies.
|
183 |
21784897
|
In summary, these data suggest that IHG-1 increases mitochondrial biogenesis by promoting PGC-1α-dependent processes, potentially contributing to the pathogenesis of renal fibrosis.
|
184 |
21911054
|
Damage of mtDNA, copy number, and biogenesis (PGC1, NRF1, TFAM) were analyzed in the retinas from streptozotocin-diabetic wild-type (WT) and MnSOD transgenic (Tg) mice.
|
185 |
21911054
|
Binding between TFAM and chaperone Hsp70 was quantified by coimmunoprecipitation.
|
186 |
21911054
|
The gene transcripts of PGC1, NRF1, and TFAM were increased, but mitochondrial accumulation of TFAM was significantly decreased, and the binding of Hsp70 and TFAM was subnormal compared to WT nondiabetic mice.
|
187 |
21911054
|
Damage of mtDNA, copy number, and biogenesis (PGC1, NRF1, TFAM) were analyzed in the retinas from streptozotocin-diabetic wild-type (WT) and MnSOD transgenic (Tg) mice.
|
188 |
21911054
|
Binding between TFAM and chaperone Hsp70 was quantified by coimmunoprecipitation.
|
189 |
21911054
|
The gene transcripts of PGC1, NRF1, and TFAM were increased, but mitochondrial accumulation of TFAM was significantly decreased, and the binding of Hsp70 and TFAM was subnormal compared to WT nondiabetic mice.
|
190 |
23073711
|
VSMCs subjected to hyperinsulinemia exhibited increased migration and proliferation, and this is paralleled by oxidative stress [increased NADPH oxidase activity, NADPH oxidase 1 mRNA expression, and reactive oxygen species (ROS) generation], alterations in mitochondrial physiology (membrane depolarization, decreased mitochondrial mass, and increased mitochondrial ROS), changes in mitochondrial biogenesis-related genes (mitofusin 1, mitofusin 2, dynamin-related protein 1, peroxisome proliferator-activated receptor gamma coactivator 1-alpha, peroxisome proliferator-activated receptor gamma coactivator 1-beta, nuclear respiratory factor 1, and uncoupling protein 2), and increased Akt phosphorylation.
|
191 |
23460046
|
Impaired mitochondrial biogenesis due to dysfunctional adiponectin-AMPK-PGC-1α signaling contributing to increased vulnerability in diabetic heart.
|
192 |
23460046
|
Whether adiponectin (APN), a potent cardioprotective molecule, regulates cardiac mitochondrial function has also not been previously investigated.
|
193 |
23460046
|
Moreover, mitochondrial biogenesis of ob/ob cardiomyocytes is significantly impaired, as evidenced by reduced Ppargc-1a/Nrf-1/Tfam mRNA levels, mitochondrial DNA content, ATP content, citrate synthase activity, complexes I/III/V activity, AMPK phosphorylation, and increased PGC-1α acetylation.
|
194 |
23460046
|
Since APN is an upstream activator of AMPK and APN plasma levels are significantly reduced in ob/ob mice, we further tested the hypothesis that reduced APN in ob/ob mice is causatively related to mitochondrial biogenesis impairment.
|
195 |
23700793
|
Apoptotic peaks, mitochondrial ultrastructure, ATP/ADP, mRNA levels of peroxisome proliferater activated receptor gamma coactivator-1 (PGC-1) and nucleus respiratory factor-1 (NRF-1) as well as insulin secretion were measured.
|
196 |
23700793
|
Palmitate could increase apoptotic peaks, decrease ATP/ADP ratio, enhance the expression of PGC-1 mRNA and NRF-1 mRNA, and decrease glucose stimulated insulin secretion (GSIS).
|
197 |
23700793
|
In contrast, PIO could decrease apoptotic peaks, restore partly ATP/ADP ratio, decrease the expression of PGC-1 mRNA and NRF-1 mRNA, and increase GSIS level.
|
198 |
23700793
|
These results demonstrate that PIO could ameliorate palmitate induced damage to mitochondrion ultrastructure and function and restore GSIS, accompanied by the modulation of PGC-1 and NRF-1 expression.
|
199 |
23700793
|
Apoptotic peaks, mitochondrial ultrastructure, ATP/ADP, mRNA levels of peroxisome proliferater activated receptor gamma coactivator-1 (PGC-1) and nucleus respiratory factor-1 (NRF-1) as well as insulin secretion were measured.
|
200 |
23700793
|
Palmitate could increase apoptotic peaks, decrease ATP/ADP ratio, enhance the expression of PGC-1 mRNA and NRF-1 mRNA, and decrease glucose stimulated insulin secretion (GSIS).
|
201 |
23700793
|
In contrast, PIO could decrease apoptotic peaks, restore partly ATP/ADP ratio, decrease the expression of PGC-1 mRNA and NRF-1 mRNA, and increase GSIS level.
|
202 |
23700793
|
These results demonstrate that PIO could ameliorate palmitate induced damage to mitochondrion ultrastructure and function and restore GSIS, accompanied by the modulation of PGC-1 and NRF-1 expression.
|
203 |
23700793
|
Apoptotic peaks, mitochondrial ultrastructure, ATP/ADP, mRNA levels of peroxisome proliferater activated receptor gamma coactivator-1 (PGC-1) and nucleus respiratory factor-1 (NRF-1) as well as insulin secretion were measured.
|
204 |
23700793
|
Palmitate could increase apoptotic peaks, decrease ATP/ADP ratio, enhance the expression of PGC-1 mRNA and NRF-1 mRNA, and decrease glucose stimulated insulin secretion (GSIS).
|
205 |
23700793
|
In contrast, PIO could decrease apoptotic peaks, restore partly ATP/ADP ratio, decrease the expression of PGC-1 mRNA and NRF-1 mRNA, and increase GSIS level.
|
206 |
23700793
|
These results demonstrate that PIO could ameliorate palmitate induced damage to mitochondrion ultrastructure and function and restore GSIS, accompanied by the modulation of PGC-1 and NRF-1 expression.
|
207 |
23700793
|
Apoptotic peaks, mitochondrial ultrastructure, ATP/ADP, mRNA levels of peroxisome proliferater activated receptor gamma coactivator-1 (PGC-1) and nucleus respiratory factor-1 (NRF-1) as well as insulin secretion were measured.
|
208 |
23700793
|
Palmitate could increase apoptotic peaks, decrease ATP/ADP ratio, enhance the expression of PGC-1 mRNA and NRF-1 mRNA, and decrease glucose stimulated insulin secretion (GSIS).
|
209 |
23700793
|
In contrast, PIO could decrease apoptotic peaks, restore partly ATP/ADP ratio, decrease the expression of PGC-1 mRNA and NRF-1 mRNA, and increase GSIS level.
|
210 |
23700793
|
These results demonstrate that PIO could ameliorate palmitate induced damage to mitochondrion ultrastructure and function and restore GSIS, accompanied by the modulation of PGC-1 and NRF-1 expression.
|
211 |
23936397
|
PGC-1α, a transcriptional coactivator, controls inflammation and mitochondrial gene expression in insulin-sensitive tissues following exercise intervention.
|
212 |
23936397
|
However, attributing such effects to PGC-1α is counfounded by exercise-induced fluctuations in blood glucose, insulin or bodyweight in diabetic patients.
|
213 |
23936397
|
Curiously, such an anti-inflammatory effect was also linked to attenuated expression of downstream transcription factors of PGC-1α such as NRF-1 and several respiratory genes.
|