Open Veterinary Journal

Open Veterinary Journal

Peer-Reviewed Journal 
ISSN 2218-6050 (Online), ISSN 2226-4485 (Print) 


Aging effect on plasma metabolites and hormones concentrations in riding horses

K. Kawasumi1, M. Yamamoto1, M. Koide2, Y. Okada1, N. Mori1, I. Yamamoto1 and T. Arai1,*

1Department of Basic Veterinary Medicine, School of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonancho, Musashino, Tokyo 180-8602, Japan

2Japan Horseback Riding Club, 685-1 Kitanagai Miyoshicho, Iruma-gun, Saitama 354-0044, Japan



Age effects on plasma metabolites, hormone concentrations, and enzyme activities related to energy metabolism were investigated in 20 riding horses. Animals were divided into two groups: Young (3-8 years) and aged (11-18 years). They were clinically healthy, and not obese. Plasma adiponectin (ADN) concentrations in aged horses were significantly lower than those in young horses (mean±SE, 6.5±1.3 μg mL-1 vs, 10.9±1.7 μg mL-1, Mann-Whitney U test, respectively; P=0.0233). Plasma non-esterified fatty acid levels and Insulin and malondialdehyde concentrations in aged group tended to increase compared to those in young group although there were not significant differences statistically. In aged group, malate dehydrogenase/lactate dehydrogenase (M/L) ratio, which is considered an energy metabolic indicator, did not change significantly compared to that in young group. Present data suggest that aging may negatively affect nutrition metabolism, but not induce remarkable changes in M/L ratio in riding horses.

Keywords: Adiponectin, Aging, Horses.


Cite this paper:

Kawasumi, K., Yamamoto, M., Koide, M., Okada, Y., Mori, N., Yamamoto, I. and Arai, T. 2015. Aging effect on plasma metabolites and hormones concentrations in riding horses. Open Vet. J. 5(2), 154-157.