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Growth and Plasma Leptin in Yearling Mares Fed a High-Fat Supplemented Diet

Published online by Cambridge University Press:  09 March 2007

PR Buff ,
CD Morrison ,
JA Reynolds  and
DH Keisler
PR Buff
Affiliation:
Division of Animal Sciences, 160 Animal Science Research Center, University of Missouri, Columbia, MO 65211, USA
CD Morrison
Affiliation:
Pennington Biomedical Research Center, Baton Rouge, LA 70817, USA
JA Reynolds
Affiliation:
ADM Alliance Nutrition, 1000 N 30th Street, Quincy, IL 62301, USA
DH Keisler*
Affiliation:
Division of Animal Sciences, 160 Animal Science Research Center, University of Missouri, Columbia, MO 65211, USA
*
*Corresponding author: [email protected]
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Abstract

Our objective was to determine if feeding a high-fat supplement versus a control supplement to growing yearling mares would affect growth an/r body composition parameters as assessed via body weight (BW), body condition scores (BCS) and concentrations of plasma hormones. Eight yearling mares were paired by initial BW (348±19kg) and maintained on pasture and supplemented with either a high-fat supplement (16% fat) or a control supplement (3% fat) at 0.8% of their BW in two daily meals for 8 weeks. Both BW and BCS increased for all mares throughout the study (each P<0.0001); however, no difference in BW or BCS could be attributed to treatment effects. Nonetheless, plasma concentrations of leptin were greater in mares fed the high-fat supplement (P = 0.0001) compared with the control supplement. Plasma concentrations of growth hormone tended to be greater in high-fat-fed mares (P = 0.06). Plasma concentrations of insulin did not differ between treatment groups (P = 0.96). Although no gross difference in BW or BCS was discernable among mares fed the control versus high-fat supplement, these data provide evidence that increasing fat content in the diet may alter leptin levels independent of changes in body composition.

Keywords

leptinequinehigh-fat dietbody condition
Type
Research Article
Information
Equine and Comparative Exercise Physiology , Volume 3 , Issue 3 , August 2006 , pp. 137 - 141
Copyright
Copyright © Cambridge University Press 2006

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