Leptin concentration in plasma and in milk during the interpartum period in the mare

Animal Reproduction Science
U RomagnoliM Baratta

Abstract

The aim of this work is to investigate on plasma profiles of leptin and estradiol 17beta during the interpartum period and leptin concentrations in the milk and in the colostrum during the period from parturition to the successive delivery in mare. Leptin plasma concentration varied from 5.1+/-2.3 ng/ml after the first parturition (week 0) to 3.0+/-0.7 at week 21 (p<0.05), then it increased to maximal level at week 49 (6.9+/-1.0 ng/ml, p<0.05). Leptin concentration in the colostrum and in the milk has been significantly (p<0.05) higher than that in plasma samples at week 1 (milk 8.8+/-2.3 versus plasma 5.2+/-0.6 ng/ml) and between week 12 and 17. This difference may be explained with a local leptin production at mammary level and supports a role of leptin in the mammary gland and/or in foal intestine. Estradiol 17beta increased from week 15 (17.9+/-2.3 pg/ml) up to 487.9+/-67.7 pg/ml at week 43. Plasma estradiol 17beta rise anticipated by 4 weeks plasma leptin increase and it does not seem to be positively correlated to leptin secretion.

References

May 8, 1997·Nature·F ZhangR W Schevitz
Oct 6, 1997·Proceedings of the National Academy of Sciences of the United States of America·N HoggardJ G Mercer
Feb 24, 1998·Biology of Reproduction·L J Spicer, C C Francisco
Sep 2, 1998·European Journal of Endocrinology·E MannucciC M Rotella
Nov 26, 1999·Obesity Research·S Wu-PengR L Leibel
Apr 11, 2003·Regulatory Peptides·Mario BarattaCarlo Tamanini
Jun 2, 2005·Domestic Animal Endocrinology·G Ferreira-DiasJ Robalo Silva

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Citations

Apr 28, 2009·Veterinary Clinical Pathology·M Judith RadinBethany J Holycross
Jul 7, 2009·Animal Reproduction Science·Amal M Abo El-Maaty, Faten I Gabr
Nov 20, 2016·Equine Veterinary Journal·S SmithN J Menzies-Gow
Jun 23, 2010·Reproduction in Domestic Animals = Zuchthygiene·W KędzierskiS Kowalik

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