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J. Biol. Chem., Vol. 283, Issue 1, 541-553, January 4, 2008
Nuclear Receptor Coactivator PNRC2 Regulates Energy Expenditure and Adiposity* 1 1![]() ![]() ![]() 3
From the
PNRC2 was identified in our laboratory as a general cofactor for nuclear receptors. To better characterize the physiological function of PNRC2, we used gene-targeting technology to generate PNRC2-null mice (PNRC2-/- mice). These PNRC2-/- mice are viable and fertile. PNRC2-null mice, especially male mice, are lean and are resistant to high fat diet-induced obesity but without the induction of insulin resistance. Male mice devoid of PNRC2 protein have a higher metabolic rate than wild-type mice. They consume more oxygen and produce more heat. Consistent with reduced adipose mass, the levels of leptin are lower in PNRC2-/- mice. This study provides evidence that PNRC2 plays one or more important roles in controlling the energy balance between energy storage and energy expenditure. PNRC2 may be a new target in the treatment of obesity and related metabolic diseases.
Received for publication, April 17, 2007 , and in revised form, October 9, 2007. * This work was supported in part by National Institutes of Health Grant DK60560 (to S. C.). The Transgenic Mouse Facility and the Animal Resources Center at the Beckman Research Institute of the City of Hope are supported by the City of Hope Comprehensive Cancer Center (Grant CA33572). The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. Section 1734 solely to indicate this fact. 1 Both authors contributed equally to this work. 2 Supported by National Institutes of Health Grant DK59630. 3 To whom correspondence should be addressed: Tel.: 626-359-8111 (ext. 63454); Fax: 626-301-8972; E-mail: schen{at}coh.org.
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