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Science. 2002 Aug 2;297(5582):843-5.

betaAR signaling required for diet-induced thermogenesis and obesity resistance.

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  • 1Department of Medicine, Division of Endocrinology, Beth Israel Deaconess Medical Center and Harvard Medical School, 99 Brookline Avenue, Boston, MA 02215, USA.

Abstract

Excessive caloric intake is thought to be sensed by the brain, which then activates thermogenesis as a means of preventing obesity. The sympathetic nervous system, through beta-adrenergic receptor (betaAR) action on target tissues, is likely the efferent arm of this homeostatic mechanism. To test this hypothesis, we created mice that lack the three known betaARs (beta-less mice). beta-less mice on a Chow diet had a reduced metabolic rate and were slightly obese. On a high-fat diet, beta-less mice, in contrast to wild-type mice, developed massive obesity that was due entirely to a failure of diet-induced thermogenesis. These findings establish that betaARs are necessary for diet-induced thermogenesis and that this efferent pathway plays a critical role in the body's defense against diet-induced obesity.

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PMID:
12161655
[PubMed - indexed for MEDLINE]
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