PMID- 9794487 OWN - NLM STAT- MEDLINE DCOM- 19981106 LR - 20061115 IS - 0013-7227 (Print) IS - 0013-7227 (Linking) VI - 139 IP - 11 DP - 1998 Nov TI - Leptin decreases food intake induced by melanin-concentrating hormone (MCH), galanin (GAL) and neuropeptide Y (NPY) in the rat. PG - 4739-42 AB - Recent evidence suggests that leptin reduces food intake (FI) by acting at the hypothalamic level. Leptin decreases hypothalamic neuropeptide Y (NPY), melanin-concentrating hormone (MCH) and galanin (GAL) gene expression in rats. The purpose of the present study was to test the hypothesis that leptin decreases FI by additionally modulating the action of NPY, MCH or GAL in the hypothalamus. Intracerebroventricular (i.c.v.) administration of NPY, MCH or GAL induced FI in satiated rats. A prior i.c.v. injection of leptin (4 microg) completely prevented the increase of FI either by MCH, GAL or NPY. These results suggest that modulation of post-synaptic actions of MCH, GAL and NPY is one of the mechanisms of leptin signaling in the hypothalamus. FAU - Sahu, A AU - Sahu A AD - Department of Cell Biology and Physiology, University of Pittsburgh School of Medicine, PA 15261, USA. asahu@vms.cis.pitt.edu LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Endocrinology JT - Endocrinology JID - 0375040 RN - 0 (Appetite Stimulants) RN - 0 (Hypothalamic Hormones) RN - 0 (Leptin) RN - 0 (Melanins) RN - 0 (Neuropeptide Y) RN - 0 (Pituitary Hormones) RN - 0 (Proteins) RN - 67382-96-1 (melanin-concentrating hormone) RN - 88813-36-9 (Galanin) SB - IM MH - Animals MH - Appetite Stimulants/*antagonists & inhibitors/*pharmacology MH - Eating/*drug effects MH - Galanin/*antagonists & inhibitors/*pharmacology MH - Hypothalamic Hormones/*antagonists & inhibitors/*pharmacology MH - Injections, Intraventricular MH - Leptin MH - Male MH - Melanins/*antagonists & inhibitors/*pharmacology MH - Neuropeptide Y/*antagonists & inhibitors/*pharmacology MH - Obesity/physiopathology MH - Pituitary Hormones/*antagonists & inhibitors/*pharmacology MH - Proteins/*pharmacology MH - Rats MH - Rats, Sprague-Dawley EDAT- 1998/10/30 00:00 MHDA- 1998/10/30 00:01 CRDT- 1998/10/30 00:00 PHST- 1998/10/30 00:00 [pubmed] PHST- 1998/10/30 00:01 [medline] PHST- 1998/10/30 00:00 [entrez] AID - 10.1210/endo.139.11.6432 [doi] PST - ppublish SO - Endocrinology. 1998 Nov;139(11):4739-42. doi: 10.1210/endo.139.11.6432.