Histone methylation regulator PTIP is required for PPARgamma and C/EBPalpha expression and adipogenesis.
Histone methylation regulator PTIP is required for PPARgamma and C/EBPalpha expression and adipogenesis.
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DOI:
10.1016/j.cmet.2009.05.010
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发表时间:
2009-07
期刊:
影响因子:
29
通讯作者:
Ge K
中科院分区:
文献类型:
--
作者:
Cho YW;Hong S;Jin Q;Wang L;Lee JE;Gavrilova O;Ge K
PPARγ and C/EBPα cooperate to control preadipocyte differentiation (adipogenesis). However, the factors that regulate PPARγ and C/EBPα expression during adipogenesis remain largely unclear. Here we show PTIP, a protein that associates with histone H3K4 methyltransferases, regulates PPARγ and C/EBPα expression in mouse embryonic fibroblasts (MEFs) and during preadipocyte differentiation. PTIP deletion in MEFs leads to marked decreases of PPARγ expression and PPARγ-stimulated C/EBPα expression. Further, PTIP is essential for induction of PPARγ and C/EBPα expression during preadipocyte differentiation. Deletion of PTIP impairs the enrichment of H3K4 trimethylation and RNA polymerase II on PPARγ and C/EBPα promoters. Accordingly, PTIP−/− MEFs and preadipocytes all show striking defects in adipogenesis. Furthermore, rescue of the adipogenesis defect in PTIP−/− MEFs requires co-expression of PPARγ and C/EBPα. Finally, deletion of PTIP in brown adipose tissue significantly reduces tissue weight in mice. Thus, by regulating PPARγ and C/EBPα expression, PTIP plays a critical role in adipogenesis.
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影响因子:
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作者:
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通讯作者:
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DOI:
10.1073/pnas.0707292104
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