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Science 13 September 1996:
Vol. 273. no. 5281, pp. 1561 - 1564
DOI: 10.1126/science.273.5281.1561

Reports

Appetite-Suppressing Effects of Urocortin, a CRF-Related Neuropeptide

Mariarosa Spina, Emilio Merlo-Pich, * Raymond K. W. Chan, Ana Maria Basso, Jean Rivier, Wylie Vale, George F. Koob dagger

The neuropeptide corticotropin-releasing factor (CRF) is well known to act on the central nervous system in ways that mimic stress and result in decreases in exploration, increases in sympathetic activity, decreases in parasympathetic outflow, and decreases in appetitive behavior. Urocortin, a neuropeptide related to CRF, binds with high affinity to the CRF2 receptor, is more potent than CRF in suppressing appetite, but is less potent than CRF in producing anxiety-like effects and activation. Doses as low as 10 nanograms injected intracerebroventricularly were effective in decreasing food intake in food-deprived and free-feeding rats. These results suggest that urocortin may be an endogenous CRF-like factor in the brain responsible for the effects of stress on appetite.

M. Spina, E. Merlo-Pich, A. M. Basso, G. F. Koob, Department of Neuropharmacology, The Scripps Research Institute, 10666 North Torrey Pines Road, La Jolla, CA 92037, USA.
R. K. W. Chan, Laboratory of Neuronal Structure and Function, The Salk Institute, La Jolla, CA 92037, USA.
J. Rivier and W. Vale, Clayton Foundation Laboratories for Peptide Biology, The Salk Institute, La Jolla, CA 92037, USA.
*   Present address: Geneva Biomedical Research Institute, Glaxo-Wellcome R&D, 14, Chemin des Aulx, 1228 Plan-les-Ouates, Case Postale 674, Geneva, Switzerland.

dagger    To whom correspondence should be addressed.



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Corticotropin-releasing factor-binding protein ligand inhibitor blunts excessive weight gain in genetically obese Zucker rats and rats during nicotine withdrawal.
S. C. Heinrichs, J. Lapsansky, D. P. Behan, R. K. W. Chan, P. E. Sawchenko, M. Lorang, N. Ling, W. W. Vale, and E. B. De Souza (1996)
PNAS 93, 15475-15480
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The inhibitory effect of hormones associated with stress on Na appetite of sheep.
R. S. Weisinger, J. R. Blair-West, P. Burns, D. A. Denton, M. J. McKinley, B. Purcell, W. Vale, J. Rivier, and K. Sunagawa (2000)
PNAS 97, 2922-2927
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Science. ISSN 0036-8075 (print), 1095-9203 (online)