Coordinated seasonal regulation of metabolic and reproductive hypothalamic peptides in the desert jerboa.

Autor: Talbi R; Institute of Cellular and Integrative Neurosciences, Department of Neurobiology of Rhythms, CNRS UPR 3212, University of Strasbourg, Strasbourg, France.; Laboratory of Neuroendocrinology and Nutritional and Climatic Environment, Faculty of Sciences, University of Sidi Mohammed Ben Abdellah, BP 1796-ATLAS, FES, Morocco., Klosen P; Institute of Cellular and Integrative Neurosciences, Department of Neurobiology of Rhythms, CNRS UPR 3212, University of Strasbourg, Strasbourg, France., Laran-Chich MP; Institute of Cellular and Integrative Neurosciences, Department of Neurobiology of Rhythms, CNRS UPR 3212, University of Strasbourg, Strasbourg, France., El Ouezzani S; Laboratory of Neuroendocrinology and Nutritional and Climatic Environment, Faculty of Sciences, University of Sidi Mohammed Ben Abdellah, BP 1796-ATLAS, FES, Morocco., Simonneaux V; Institute of Cellular and Integrative Neurosciences, Department of Neurobiology of Rhythms, CNRS UPR 3212, University of Strasbourg, Strasbourg, France. simonneaux@inci-cnrs.unistra.fr.
Jazyk: angličtina
Zdroj: The Journal of comparative neurology [J Comp Neurol] 2016 Dec 15; Vol. 524 (18), pp. 3717-3728. Date of Electronic Publication: 2016 May 23.
DOI: 10.1002/cne.24026
Abstrakt: Jerboa (Jaculus orientalis) is a semi-desert rodent displaying strong seasonal variations in biological functions in order to survive harsh conditions. When environmental conditions become unfavorable in early autumn, it shuts down its reproductive axis, increases its body weight, and finally hibernates. In spring, the jerboa displays opposite regulations, with a reactivation of reproduction and reduction in body weight. This study investigated how genes coding for different hypothalamic peptides involved in the central control of reproduction (Rfrp and Kiss1) and energy homeostasis (Pomc, Npy, and Somatostatin) are regulated according to seasons in male jerboas captured in the wild in spring or autumn. Remarkably, a coordinated increase in the mRNA level of Rfrp in the dorso/ventromedial hypothalamus and Kiss1, Pomc, and Somatostatin in the arcuate nucleus was observed in jerboas captured in spring as compared to autumn animals. Only Npy gene expression in the arcuate nucleus displayed no significant variations between the two seasons. These variations appear in line with the jerboa's seasonal physiology, since the spring increase in Rfrp and Kiss1 expression might be related to sexual reactivation, while the spring increase in genes encoding anorexigenic peptides, POMC, and somatostatin may account for the reduced body weight reported at this time of the year. J. Comp. Neurol. 524:3717-3728, 2016. © 2016 Wiley Periodicals, Inc.
(© 2016 Wiley Periodicals, Inc.)
Databáze: MEDLINE
Externí odkaz: