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- W2041487617 abstract "We have previously reported an association between the activator protein-2beta (AP-2beta) transcription factor gene and type 2 diabetes. This gene is preferentially expressed in adipose tissue, and subjects with a disease-susceptible allele of AP-2beta showed stronger AP-2beta expression in adipose tissue than those without the susceptible allele. Furthermore, overexpression of AP-2beta led to lipid accumulation and induced insulin resistance in 3T3-L1 adipocytes.We found that overexpression of AP-2beta in 3T3-L1 adipocytes decreased the promoter activity of leptin, and subsequently decreased both messenger RNA (mRNA) and protein expression and secretion. Furthermore, knockdown of endogenous AP-2beta by RNA-interference increased mRNA and protein expression of leptin. Electrophoretic mobility shift and chromatin immunoprecipitation assays revealed specific binding of AP-2beta to leptin promoter regions in vitro and in vivo. In addition, site-directed mutagenesis of the AP-2-binding site located between position +34 and +42 relative to the transcription start site abolished the inhibitory effect of AP-2beta. Our results clearly showed that AP-2beta directly inhibited insulin-sensitizing hormone leptin expression by binding to its promoter.AP-2beta modulated the expression of leptin through direct interaction with its promoter region." @default.
- W2041487617 created "2016-06-24" @default.
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- W2041487617 date "2010-01-12" @default.
- W2041487617 modified "2023-10-13" @default.
- W2041487617 title "Transcription factor AP-2β inhibits expression and secretion of leptin, an insulin-sensitizing hormone, in 3T3-L1 adipocytes" @default.
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- W2041487617 doi "https://doi.org/10.1038/ijo.2009.295" @default.
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