Hzf regulates adipogenesis through translational control of C/EBPalpha.

Hiroyuki Kawagishi, Takeshi Wakoh, Hatsume Uno, Mitsuo Maruyama, Ayako Moriya, Satoru Morikawa, Hideyuki Okano, Charles J Sherr, Masatoshi Takagi, Masataka Sugimoto

The EMBO journal 2008 May 21

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Adipocyte differentiation requires a well-defined programme of gene expression in which the transcription factor C/EBPalpha (CCAAT/enhancer-binding protein) has a central function. Here, we show that Hzf (haematopoietic zinc-finger), a previously identified p53 transcriptional target, regulates C/EBPalpha expression. Hzf is induced during differentiation of preadipocyte cell lines, and its suppression by short hairpin RNA disrupts adipogenesis. In Hzf's absence, expression of C/EBPalpha is severely impaired because of reduced translation of its mRNA. Hzf physically interacts with the 3' untranslated region of C/EBPalpha mRNA to enhance its translation. Taken together, these findings underscore a critical role of Hzf in the adipogenesis regulatory cascade.

Citation

Hiroyuki Kawagishi, Takeshi Wakoh, Hatsume Uno, Mitsuo Maruyama, Ayako Moriya, Satoru Morikawa, Hideyuki Okano, Charles J Sherr, Masatoshi Takagi, Masataka Sugimoto. Hzf regulates adipogenesis through translational control of C/EBPalpha. The EMBO journal. 2008 May 21;27(10):1481-90