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  • Title: Identification of novel PPARgamma target genes by integrated analysis of ChIP-on-chip and microarray expression data during adipocyte differentiation.
    Author: Nakachi Y, Yagi K, Nikaido I, Bono H, Tonouchi M, Schönbach C, Okazaki Y.
    Journal: Biochem Biophys Res Commun; 2008 Jul 25; 372(2):362-6. PubMed ID: 18489901.
    Abstract:
    PPARgamma (peroxisome proliferator-activated receptor gamma) acts as a key molecule of adipocyte differentiation, and transactivates multiple target genes involved in lipid metabolic pathways. Identification of PPARgamma target genes will facilitate to predict the extent to which the drugs can affect and also to understand the molecular basis of lipid metabolism. Here, we have identified five target genes regulated directly by PPARgamma during adipocyte differentiation in 3T3-L1 cells using integrated analyses of ChIP-on-chip and expression microarray. We have confirmed the direct PPARgamma regulation of five genes by luciferase reporter assay in NIH-3T3 cells. Of these five genes Hp, Tmem143 and 1100001G20Rik are novel PPARgamma targets. We have also detected PPREs (PPAR response elements) sequences in the promoter region of the five genes computationally. Unexpectedly, most of the PPREs detected proved to be atypical, suggesting the existence of more atypical PPREs than previously thought in the promoter region of PPARgamma regulated genes.
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