title: Modulation of adipogenesis-related gene expression by estrogen-related receptor gamma during adipocytic differentiation.
abstract: Estrogen-related receptor gamma (ERRgamma) is an orphan nuclear receptor that regulates cellular energy metabolism by modulating gene expression involved in oxidative metabolism and mitochondrial biogenesis in brown adipose tissue and heart. However, the physiological role of ERRgamma in adipogenesis and the development of white adipose tissue has not been well studied. Here we show that ERRgamma was up-regulated in murine mesenchyme-derived cells, especially in ST2 and C3H10T1/2 cells, at mRNA levels under the adipogenic differentiation condition including the inducer of cAMP, glucocorticoid, and insulin. The up-regulation of ERRgamma mRNA was also observed in inguinal white adipose and brown adipose tissues of mice fed a high-fat diet. Gene knockdown by ERRgamma-specific siRNA results in mRNA down-regulation of adipogenic marker genes including fatty acid binding protein 4, PPARgamma, and PGC-1beta in a preadipocyte cell line 3T3-L1 preadipocytes and mesenchymal ST2 and C3H10T1/2 cells in the adipogenesis medium. In contrast, stable expression of ERRgamma in 3T3-L1 cells resulted in up-regulation of these adipogenic marker genes under the adipogenic condition. These results suggest that ERRgamma positively regulate the adipocyte differentiation with modulating the expression of various adipogenesis-related genes.
authors.affiliation: Division of Gene Regulation and Signal Transduction, Research Center for Genomic Medicine, Saitama Medical University, Saitama, Japan.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Kubo
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Ijichi
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Ikeda
authors.forename: Kuniko
authors.initials: K
authors.lastname: Horie-Inoue
authors.forename: Satoru
authors.initials: S
authors.lastname: Takeda
authors.forename: Satoshi
authors.initials: S
authors.lastname: Inoue
mesh_terms: D041721:3T3-L1 Cells; D017667:Adipocytes / Q000166:cytology* / Q000378:metabolism*; D050156:Adipogenesis / Q000235:genetics*; D000818:Animals; D002454:Cell Differentiation / Q000235:genetics / Q000502:physiology*; D002460:Cell Line; D005786:Gene Expression Regulation; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D034622:RNA Interference; D011960:Receptors, Estrogen / Q000235:genetics / Q000502:physiology*; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: C490916:Esrrg protein, mouse; D011960:Receptors, Estrogen