Document Detail


Neuroendocrine Regulatory Peptide-1 and Neuroendocrine Regulatory Peptide-2 influence differentially feeding and penile erection in male rats: Sites of action in the brain.
MedLine Citation:
PMID:  22561139     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The effect of NERP-1 and NERP-2, two recently discovered VGF-derived peptides, on feeding and penile erection was studied after injection into the lateral ventricles, the lateral hypothalamus, the arcuate nucleus or the paraventricular nucleus of the hypothalamus. NERP-2 (1-5nmol), but not NERP-1 (2-4nmol), increased feeding in a dose-dependent manner when injected into the lateral ventricles or bilaterally into the lateral hypothalamus but not into the arcuate or the paraventricular nucleus. The effect of NERP-2 given into the lateral ventricles was found in the first, but not in the second 60min after treatment, and was antagonized by SB-408124, an orexin-1 receptor antagonist given into the lateral ventricles or the arcuate nucleus, but not into the paraventricular nucleus. However, SB-408124 was unable to reduce NERP-2-induced feeding when injected bilaterally into the lateral hypothalamus before NERP-2 given also bilaterally into the lateral hypothalamus. In contrast, NERP-1, but not NERP-2, induced penile erection in a dose-dependent manner when injected into the lateral ventricles or the arcuate nucleus, but not into the paraventricular nucleus or the lateral hypothalamus. The pro-erectile effect of NERP-1 was not prevented by the prior injection of d(CH(2))(5)Tyr (Me)(2)-Orn(8)-oxytocin or SB-408124 into the lateral ventricles. The present results suggest that while NERP-2 facilitates feeding by acting in the lateral hypothalamus, possibly by increasing orexin activity in the arcuate nucleus, NERP-1 facilitates penile erection by acting in the arcuate nucleus with a mechanism not related to orexin or oxytocin.
Authors:
Maria Rosaria Melis; Fabrizio Sanna; Salvatora Succu; Gian Luca Ferri; Antonio Argiolas
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-2
Journal Detail:
Title:  Regulatory peptides     Volume:  -     ISSN:  1873-1686     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8100479     Medline TA:  Regul Pept     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier B.V.
Affiliation:
Bernard B Brodie Department of Neuroscience and Centre of Excellence for the Neurobiology of Addictions, University of Cagliari, and Institute of Neuroscience, National Research Council, Cagliari Section, 09042 Monserrato, Cagliari, Italy.
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