Identification of peroxisome-proliferator responsive element in the mouse HSL gene
- Central Laboratories for Frontier Technology, Kirin Brewery Co., Ltd., Kanazawa-ku Fukuura 1-13-5, Yokohama 236-0004 (Japan)
Hormone-sensitive lipase (HSL) catalyzes the rate-limiting step of lipolysis in adipose tissue. Several studies suggest that protein phosphorylation regulates the HSL enzymatic activity. On the other hand, the precise mechanism of the transcriptional regulation of the HSL gene remains to be elucidated. Here, we identified a functional peroxisome-proliferator responsive element (PPRE) in the mouse HSL promoter by reporter assay in CV-1 cells using serial deletion and point mutants of the 5'-flanking region. Chromatin immunoprecipitation (ChIP) analysis revealed that both peroxisome-proliferator activated receptor (PPAR{gamma}) and retinoid X receptor (RXR{alpha}) interacted with the region. Binding of the PPAR{gamma}/RXR{alpha} heterodimer to the PPRE sequence was also confirmed by electrophoretic mobility shift assay. These results indicate that the HSL gene is transcriptionally regulated by PPAR{gamma}/RXR{alpha} heterodimer, and suggest that a cis-acting element regulates the HSL gene expression.
- OSTI ID:
- 20857959
- Journal Information:
- Biochemical and Biophysical Research Communications, Vol. 352, Issue 2; Other Information: DOI: 10.1016/j.bbrc.2006.11.054; PII: S0006-291X(06)02525-3; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0006-291X
- Country of Publication:
- United States
- Language:
- English
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