Document Detail

Effects of dietary antioxidant supplementation on oxidative damage and resistance to oxidative damage during prolonged exercise in sled dogs.
MedLine Citation:
PMID:  10951977     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: To determine effects of dietary antioxidant supplementation on plasma concentrations of antioxidants, exercise-induced oxidative damage, and resistance to oxidative damage during exercise in Alaskan sled dogs. ANIMALS: 62 Alaskan sled dogs. PROCEDURE: Dogs were matched for age, sex, and ability and assigned to 1 of 3 groups: sedentary and nonsupplemented (control [C]; n = 21), exercised and supplemented (S; 22), and exercised and nonsupplemented (N; 19). Dogs in group S were given 400 units of alpha-tocopherol acetate, 3 mg of beta-carotene, and 20 mg of lutein orally per day for 1 month, then dogs in groups S and N completed 3 days of exercise. Blood samples were collected before and after 1 and 3 days of exercise and after 3 days of rest. Plasma antioxidant concentrations were determined, and oxidative damage to DNA (plasma 7,8 dihydro-8-oxo-2'deoxyguanosine [8-oxodG] concentration) and membrane lipids (plasma hydroperoxide concentration) and resistance of plasma lipoproteins to oxidation were assessed. RESULTS: Supplementation increased plasma concentrations of alpha-tocopherol, beta-carotene, and lutein. Plasma concentration of alpha-tocopherol increased and concentration of lutein decreased in group S with exercise. Concentration of 8-oxodG decreased in group S but increased in group N during and after exercise. Lag time of in vitro oxidation of lipoprotein particles increased with exercise in group S only. CONCLUSIONS AND CLINICAL RELEVANCE: Dietary supplementation with antioxidants resulted in increased plasma concentrations of antioxidants. Moreover, supplementation decreased DNA oxidation and increased resistance of lipoprotein particles to in vitro oxidation. Antioxidant supplementation of sled dogs may attenuate exercise-induced oxidative damage.
C R Baskin; K W Hinchcliff; R A DiSilvestro; G A Reinhart; M G Hayek; B P Chew; J R Burr; R A Swenson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of veterinary research     Volume:  61     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  2000 Aug 
Date Detail:
Created Date:  2000-12-21     Completed Date:  2000-12-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  886-91     Citation Subset:  IM    
Department of Veterinary Clinical Sciences, Veterinary Teaching Hospital, The Ohio State University, Columbus 43210, USA.
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MeSH Terms
Antioxidants / administration & dosage*
Deoxyguanosine / analogs & derivatives,  blood
Dietary Supplements*
Dogs / metabolism,  physiology*
Enzyme-Linked Immunosorbent Assay / veterinary
Linear Models
Lipid Peroxides / blood
Lipoproteins, LDL / blood
Lipoproteins, VLDL / blood
Lutein / administration & dosage,  blood
Oxidative Stress / physiology*
Physical Conditioning, Animal / adverse effects*
Regression Analysis
Vitamin A / blood
Vitamin E / administration & dosage,  blood
beta Carotene / administration & dosage,  blood
Reg. No./Substance:
0/Antioxidants; 0/Lipid Peroxides; 0/Lipoproteins, LDL; 0/Lipoproteins, VLDL; 11103-57-4/Vitamin A; 127-40-2/Lutein; 1406-18-4/Vitamin E; 7235-40-7/beta Carotene; 88847-89-6/8-oxo-7-hydrodeoxyguanosine; 961-07-9/Deoxyguanosine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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