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PMID |
Sentence |
1 |
11978637
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Here we show that the human GLUT2 gene is closely regulated by HNF-1alpha via sequences downstream of the transcriptional start site by interaction with transcriptional co-activator p300.
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2 |
11901161
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C/EBPalpha binding was associated with the recruitment of coactivators p300 and CREB-binding protein and a dramatic increase in histone acetylation in the vicinity of the resistin promoter.
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3 |
11901161
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Nevertheless, rosiglitazone treatment selectively decreased histone acetylation at the resistin promoter without a change in occupation by C/EBPalpha, CREB-binding protein, or p300.
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4 |
12586550
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HD transgenic mice develop an age-dependent reduction of insulin mRNA expression and diminished expression of key regulators of insulin gene transcription, including the pancreatic homeoprotein PDX-1, E2A proteins, and the coactivators CBP and p300.
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5 |
15001545
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PDX-1 interacts with multiple transcription factors and coregulators, including the coactivator p300, to activate the transcription of the insulin gene and other target genes within pancreatic beta-cells.
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6 |
15001545
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Several mutant PDX-1 proteins that are associated with heritable forms of diabetes in humans, in particular the mutant P63fsdelC, exhibited increased binding to a carboxy-terminal segment of p300 in the setting of decreased DNA-binding activities, suggesting that sequestration of p300 by mutant PDX-1 proteins may be an additional mechanism by which insulin gene expression is reduced in heterozygous carriers of pdx-1(ipf-1) mutations.
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7 |
15001545
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The introduction of the point mutations S66A/Y68A in the highly conserved amino-terminal PDX-1 transactivation domain reduced the ability of PDX-1 to interact with p300, substantially diminished the transcriptional activation of PDX-1, and reduced the synergistic activation of glucose-responsive insulin promoter enhancer sequences by PDX-1, E12, and E47.
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8 |
15001545
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Impairment of interactions between PDX-1 and p300 in pancreatic beta-cells may limit insulin production and lead to the development of diabetes.
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9 |
15743769
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Chromatin immunoprecipitation assays revealed that the decrease in insulin transcription was associated with decreases in the occupancies of Pdx-1 and p300 at the proximal insulin promoter.
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10 |
16293776
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We demonstrate that p300 and Bridge-1 proteins interact in immunopre-cipitation and glutathione-S-transferase (GST) pull-down assays.
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11 |
17065349
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We have previously shown that nuclear factor-kappaB (NF-kappaB) mediates fibronectin expression in endothelial cells and in organs affected by diabetes complications. p300, a transcription coactivator, may regulate NF-kappaB activity via poly(ADP-ribose) polymerase (PARP) activation.
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12 |
17065349
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High glucose induced fibronectin expression in the endothelial cells, which was associated with increased p300, PARP activity, and NF-kappaB activation.
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13 |
17065349
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We then used p300 small interfering RNA (siRNA) and showed decreased fibronectin and PARP expression, as well as NF-kappaB activation, in the endothelial cells.
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14 |
17065349
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These results indicate that transcriptional coactivator p300 may regulate fibronectin expression via PARP and NF-kappaB activation in diabetes.
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15 |
19843526
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Mechanistically, we find that KLF11 interacts with the coactivator p300 via its zinc finger domain in vivo to mediate Pdx-1 activation.
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16 |
19903865
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Histone H2AX phosphorylation and lysine acetylation were examined for oxidative DNA damage and p300 activation.
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17 |
19903865
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HUVECs in 25 mmol/l glucose showed increased p300 production accompanied by increased binding of p300 to ET-1 and FN promoters, augmented histone acetylation, H2AX phosphorylation, activation of multiple transcription factors, and increased mRNA expression of vasoactive factors and ECM proteins. p300 overexpression showed a glucose-like effect on the mRNA expression of ET-1, VEGF, and FN.
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18 |
21084751
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SIK2 inhibited p300 HAT activity by direct phosphorylation on Ser89, which in turn decreased ChREBP-mediated lipogenesis in hepatocytes and mice overexpressing SIK2.
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19 |
21084751
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Finally, in mouse models of type 2 diabetes and obesity, low SIK2 activity was associated with increased p300 HAT activity, ChREBP hyperacetylation, and hepatic steatosis.
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20 |
20655188
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Curcumin treatment also significantly reduced HAT activity, level of p300 and acetylated CBP/p300 gene expression, and induced HDAC2 expression by curcumin.
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21 |
19411249
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Furthermore, we found that the co-activator and histone acetyltransferase p300 co-immunoprecipitates with ChREBP and also binds to the txnip promoter in response to glucose.
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22 |
19411249
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In addition, the results reveal for the first time that ChREBP interacts with p300.
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23 |
22045654
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Curcumin also attenuated the expression of TGF-?1, CTGF, osteopontin, p300 and ECM proteins such as fibronectin and type IV collagen.
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24 |
21986529
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ATF3 interacted with PDX-1, and effectively inhibited p300-mediated transcriptional coactivation of the PBE-containing promoter, whereas C-terminal domain-deleted ATF3 did not inhibit the transcoactivation of p300.
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25 |
21986529
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ATF3 decreased the interaction of p300 with PDX-1 in MIN6N8 cells coexpressing PDX-1 and ATF3.
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26 |
21986529
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In addition, chromatin immunoprecipitation analysis demonstrated that both tunicamycin treatment and ATF3 overexpression inhibited the recruitment of p300 to PDX-1 on the insulin promoter in MIN6N8 cells.
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27 |
21986529
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Taken together, these results suggest that ATF3 inhibits PDX-1-mediated transactivation through the inhibition of p300-stimulated coactivation, which may lead to ?-cell dysfunction by ER stress.
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