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Oxidative Medicine and Cellular Longevity
Volume 2012 (2012), Article ID 920932, 15 pages
http://dx.doi.org/10.1155/2012/920932
Research Article

Biomarkers of Antioxidant Status, Inflammation, and Cartilage Metabolism Are Affected by Acute Intense Exercise but Not Superoxide Dismutase Supplementation in Horses

Department of Animal Sciences, Rutgers the State University, 84 Lipman Drive, New Brunswick, NJ 08901-8525, USA

Received 17 March 2012; Accepted 6 May 2012

Academic Editor: Manfred Lamprecht

Copyright © 2012 Emily D. Lamprecht and Carey A. Williams. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objectives were to evaluate effects of (1) repetitive arthrocentesis on biomarkers of inflammation (prostaglandin E2, PGE2) and aggrecan synthesis (chondroitin sulfate-846; CS) in synovial fluid (SF); (2) exercise and superoxide dismutase (SOD) supplementation on biomarkers of inflammation, antioxidant status, and aggrecan synthesis, in horses. Preliminary trial. Standardbreds underwent four arthrocentesis procedures within 48 h and exhibited elevated CS and no changes in PGE2. Exercise trial. this randomized crossover design used twelve Standardbred mares which received either treatment (3000 IU d−1 oral SOD powder) or placebo (cellulose powder) for 6 wks which culminated with them running a repeated sprint exercise test (RSET). Samples were collected before (PRE), during (PEAK), and following exercise (POST). Exercise resulted in increased ( 𝑃 < 0 . 0 5 ) antioxidant defenses including erythrocyte SOD, total glutathione, glutathione peroxidase, gene transcripts for interferon-gamma, interleukin-10, and interleukin-1β in blood, and decreased plasma nitric oxide. Exercise increased ( 𝑃 < 0 . 0 5 ) SF CS and adjusted-PGE2, and higher ( 𝑃 < 0 . 0 5 ) CS and PGE2 were found in hock versus carpus joints. No treatment effects were detected. Results suggest normal adaptive responses likely due to exercise-induced tissue microdamage and oxidative stress. Additional research is needed to identify benefit(s) of SOD supplementation in horses.