Hostname: page-component-76fb5796d-2lccl Total loading time: 0 Render date: 2024-04-29T08:25:33.044Z Has data issue: false hasContentIssue false
  • English
  • Français

Absence of plasma leptin or metabolite variation after subcutaneous melatonin release in adult ewe

Published online by Cambridge University Press:  20 November 2017

C. Delavaud ,
A. Daveau ,
M. Tourret ,
B. Malpaux  and
Y. Chilliard
C. Delavaud
Affiliation:
Unité de Recherche sur les Herbivores, Equipe Tissu Adipeux et Lipides du Lait, INRA-Theix, 63122 Saint-Genès-Champanelle, France
A. Daveau
Affiliation:
Unité Mixte de Recherches, Physiologie de la Reproduction et des Comportements 6073, INRA-CNRS-Université Tours, 37380 Nouzilly, France
M. Tourret
Affiliation:
Unité de Recherche sur les Herbivores, Equipe Tissu Adipeux et Lipides du Lait, INRA-Theix, 63122 Saint-Genès-Champanelle, France
B. Malpaux
Affiliation:
Unité Mixte de Recherches, Physiologie de la Reproduction et des Comportements 6073, INRA-CNRS-Université Tours, 37380 Nouzilly, France
Y. Chilliard
Affiliation:
Unité de Recherche sur les Herbivores, Equipe Tissu Adipeux et Lipides du Lait, INRA-Theix, 63122 Saint-Genès-Champanelle, France
Get access

Extract

Leptin is mainly secreted by adipose tissue and plays an important role in body homeostasis and in a great number of physiological functions, particularly in reproduction. Sheep is a seasonal ruminant whose reproductive period is initiated during decreasing day lengths. Leptin expression and secretion have shown to be decreased during short days, independently of adipose cell size, feed intake and ovarian activity (Bocquier et al., 1998). The mechanism by which leptin could be modulated is not well understood (Chilliard and Bocquier, 2000). As nocturnal pineal melatonin secretion is increased during short days, it appears as a potential mediator in the regulation of plasma leptin by photoperiod. The aim of this study was to test this hypothesis by comparing plasma leptin and metabolite concentrations in adult ewes exposed to long days treated (M), or not (LD), with melatonin after 20 and 69 days.

Type
Poster Presentations
Information
Proceedings of the British Society of Animal Science , Volume 2002 , 2002 , pp. 90
Copyright
Copyright © The British Society of Animal Science 2002

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bocquier, F., Bonnet, M., Faulconnier, Y., Guerre-Millo, M., Martin, P. and Chilliard, Y. 1998. Reproduction Nutrition Development 38: 489–498.Google Scholar
Chilliard, Y. and Bocquier, F. 2000. In Ruminant Physiology: Digestion, Metabolism, Growth and Reproduction (ed. Cronjé, P.B.), pp. 205–223. CABI Publishing, New York.CrossRefGoogle Scholar
Delavaud, C., Bocquier, F., Chilliard, Y., Keisler, D.H., Gertler, A. and Kann, G. 2000. Journal of Endocrinology 165: 519–526.CrossRefGoogle Scholar
Faulconnier, Y., Bonnet, M., Bocquier, F., Leroux, C. and Chilliard, Y. 2001. British Journal of Nutrition 85: 299–306.CrossRefGoogle Scholar
Kann, G. 1971. Comptes Rendus de l’académie des Sciences III 272 2808–2811.Google Scholar
Rasmussen, D.D., Mitton, D.R., Larsen, S.A. and Yellon, S.M. 2001. Journal of Pineal Research 31: 89–94.CrossRefGoogle Scholar