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PMID |
Sentence |
1 |
16873678
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We have recently demonstrated that carbohydrate responsive element-binding protein (ChREBP) plays a key role in the control of lipogenesis through the transcriptional regulation of lipogenic genes, including acetyl-CoA carboxylase and fatty acid synthase.
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2 |
16891625
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Both ChREBP and SREBP-1c were required for the induction of the fatty acid synthase (FAS) promoter by glucose, and chromatin immunoprecipitation (ChIP) assay revealed that glucose induced the binding of both ChREBP and SREBP-1c to the FAS promoter without affecting USF2 binding.
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3 |
16891625
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By contrast, ChIP assay revealed that high glucose prompted direct binding of ChREBP, but not SREBP-1c or USF2, to the liver-type pyruvate kinase (L-PK) promoter.
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4 |
19680233
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Recent genome-wide association studies (GWAS) in Asian Indians reported strong associations of variants near melanocortin-4 receptor (MC4R) and MLX interacting protein-like (MLXIPL) genes with insulin resistance and several obesity-related quantitative traits (QTs).
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5 |
20934404
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We show here that ChREBP inactivation in clonal pancreatic MIN6 ?-cells results in an increase in Pdx-1 expression at low glucose and to a small, but significant, increase in Ins2, GcK and MafA gene expression at high glucose concentrations.
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6 |
20934404
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Conversely, adenovirus-mediated over-expression of ChREBP in mouse pancreatic islets results in decreases in Pdx-1, MafA, Ins1, Ins2 and GcK mRNA levels.
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7 |
21084751
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In this study, we have identified the histone acetyltransferase (HAT) coactivator p300 and serine/threonine kinase salt-inducible kinase 2 (SIK2) as key upstream regulators of ChREBP activity.
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8 |
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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9 |
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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10 |
19727214
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The expressions of ChREBP and its target genes including acetyl-coenzyme A carboxylase 1 (Acc-1), fatty acid synthase (Fas), glycerol-3-phosphate acyltransferase (Gpat) were analyzed by Real-time PCR and Western blot.
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11 |
19727214
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Consistent with increased nuclear ChREBP levels, expressions of ChREBP target genes involved in lipogenesis including Acc-1, Fas and Gpat were upregulated by 2-fold(P<0.05),1.7-fold (P<0.05) and 4.2-fold(P<0.05), respectively, in db/db mice.
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12 |
21471514
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To modulate ChREBP(OG) in vitro and in vivo, the OGT and OGA enzymes were overexpressed or inhibited via adenoviral approaches in mouse hepatocytes and in the liver of C57BL/6J or obese db/db mice.
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13 |
21471514
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Our study shows that ChREBP interacts with OGT and is subjected to O-GlcNAcylation in liver cells.
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14 |
21471514
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O-GlcNAcylation stabilizes the ChREBP protein and increases its transcriptional activity toward its target glycolytic (L-PK) and lipogenic genes (ACC, FAS, and SCD1) when combined with an active glucose flux in vivo.
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15 |
21471514
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Indeed, OGT overexpression significantly increased ChREBP(OG) in liver nuclear extracts from fed C57BL/6J mice, leading in turn to enhanced lipogenic gene expression and to excessive hepatic triglyceride deposition.
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16 |
21471514
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Interestingly, reducing ChREBP(OG) levels via OGA overexpression decreased lipogenic protein content (ACC, FAS), prevented hepatic steatosis, and improved the lipidic profile of OGA-treated db/db mice.
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17 |
20501667
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Under both experimental conditions in which insulin signaling to FoxO1 was impaired, we found increased activation of carbohydrate response element binding protein.
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18 |
21856285
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Here, we investigate whether ChREBP, a glucose-activated transcription factor, directly regulates Klf-10 mRNA expression in rat primary hepatocytes.
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19 |
21856285
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We found that both glucose stimulation and adenoviral overexpression of ChREBP induce Klf-10 mRNA expression in rat primary hepatocytes in a dose-dependent manner.
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20 |
21856285
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Conversely, adenoviral overexpression of KLF-10 partly inhibits glucose induction of ChREBP target genes in primary hepatocytes.
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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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Thus, with this study we have identified ChREBP as the transcription factor that mediates glucose-induced txnip expression in human islets and INS-1 beta cells and have characterized the chromatin modification associated with glucose-induced txnip transcription.
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23 |
19411249
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In addition, the results reveal for the first time that ChREBP interacts with p300.
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