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Identification of receptors for neuromedin U and its role in feeding 总被引:19,自引:0,他引:19
Howard AD Wang R Pong SS Mellin TN Strack A Guan XM Zeng Z Williams DL Feighner SD Nunes CN Murphy B Stair JN Yu H Jiang Q Clements MK Tan CP McKee KK Hreniuk DL McDonald TP Lynch KR Evans JF Austin CP Caskey CT Van der Ploeg LH Liu Q 《Nature》2000,406(6791):70-74
Neuromedin U (NMU) is a neuropeptide with potent activity on smooth muscle which was isolated first from porcine spinal cord and later from other species. It is widely distributed in the gut and central nervous system. Peripheral activities of NMU include stimulation of smooth muscle, increase of blood pressure, alteration of ion transport in the gut, control of local blood flow and regulation of adrenocortical function. An NMU receptor has not been molecularly identified. Here we show that the previously described orphan G-protein-coupled receptor FM-3 (ref. 15) and a newly discovered one (FM-4) are cognate receptors for NMU. FM-3, designated NMU1R, is abundantly expressed in peripheral tissues whereas FM-4, designated NMU2R, is expressed in specific regions of the brain. NMU is expressed in the ventromedial hypothalamus in the rat brain, and its level is significantly reduced following fasting. Intracerebroventricular administration of NMU markedly suppresses food intake in rats. These findings provide a molecular basis for the biochemical activities of NMU and may indicate that NMU is involved in the central control of feeding. 相似文献
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