Journal
FEBS LETTERS
Volume 588, Issue 23, Pages 4404-4412Publisher
WILEY
DOI: 10.1016/j.febslet.2014.10.010
Keywords
Arcuate nucleus; Feeding; Obesity; Oxytocin; Proopiomelanocortin
Funding
- Japan Society for the Promotion of Science (JSPS) [24591341]
- Memorial Foundation for Female Natural Scientists
- Kowa Life Science Foundation, Japan
- JSPS [23390044, 22659044, 26670453]
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) [10036069]
- MEXT-Supported Program for the Strategic Research Foundation at Private Universities
- Salt Science Research Foundation [1434]
- KEIRIN RACE
- Grants-in-Aid for Scientific Research [26461366, 23240057, 24591341, 22659044, 26670453, 23390044] Funding Source: KAKEN
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Intracerebroventricular injection of oxytocin (Oxt), a neuropeptide produced in hypothalamic paraventricular (PVN) and supraoptic nuclei (SON), melanocortin-dependently suppresses feeding. However, the underlying neuronal pathway is unclear. This study aimed to determine whether Oxt regulates propiomelanocortin (POMC) neurons in the arcuate nucleus (ARC) of the hypothalamus. Intra-ARC injection of Oxt decreased food intake. Oxt increased cytosolic Ca2+ in POMC neurons isolated from ARC. ARC POMC neurons expressed Oxt receptors and were contacted by Oxt terminals. Retrograde tracer study revealed the projection of PVN and SON Oxt neurons to ARC. These results demonstrate the novel oxytocinergic signaling from PVN/SON to ARC POMC, possibly regulating feeding. (C) 2014 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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