[en] In heaves-affected horses the relation between oxidant status, airway inflammation (AI) and pulmonary function (PF) is unknown. The oxidant status of blood and pulmonary epithelial lining fluid (PELF) of healthy (H, n = 6) and heaves-affected horses in clinical remission (REM, n = 6) and in crisis (CR, n = 7) was assessed at rest, during and after standardised exercise test by measurement of reduced and oxidised glutathione, glutathione redox ratio [GRR%]; uric acid and 8-epi-PGF2alpha. Oxidant status was related to PF parameters (mechanics of breathing and arterial blood gas tension) and Al parameters (bronchoalveolar lavage [BAL] neutrophil % and AI score). Haemolysate glutathione was significantly different between groups and was correlated with PF and AI parameters; GRR in PELF was increased during CR and was correlated with PF and AI parameters. Exercise induced an increase of plasma uric acid that was significantly higher both in REM and CR. PELF 8-epi-PGF2alpha was significantly increased in CR and correlated with PF and AI parameters. These results suggest that oxidative stress occurring in heaves is correlated with PF and AI and may be locally assessed by PELF glutathione status, uric acid and 8-epi-PGF2alpha. Systemic repercussions are reflected by assay of GSH in resting horses and by uric acid in exercising horses.
Disciplines :
Veterinary medicine & animal health
Author, co-author :
Kirschvink, Nathalie; Université de Liège - ULiège
Smith, N.; Centre for Equine Studies, Animal Health Trust, Newmarket, UK
Fievez, Laurence ; Université de Liège - ULiège > Département de sciences fonctionnelles > Biochimie et biologie moléculaire
Bougnet, V.; Université de Liège - ULiège
Art, Tatiana ; Université de Liège - ULiège > Département de sciences fonctionnelles > Phys. neuro-muscul., de l'effort - Méd. sport. des animaux
Degand, Guy ; Université de Liège - ULiège > Département de sciences des denrées alimentaires > Analyse des denrées alimentaires
Marlin, D.; Centre for Equine Studies, Animal Health Trust, Newmarket, UK
Roberts, C.; Centre for Equine Studies, Animal Health Trust, Newmarket, UK
Lekeux, Pierre ; Université de Liège - ULiège > Département de sciences fonctionnelles > Physiologie
Language :
English
Title :
Effect of chronic airway inflammation and exercise on pulmonary and systemic antioxidant status of healthy and heaves-affected horses
Publication date :
2002
Journal title :
Equine Veterinary Journal
ISSN :
0425-1644
eISSN :
2042-3306
Publisher :
Equine Veterinary Journal Ltd, Newmarket, United Kingdom
Volume :
34
Issue :
6
Pages :
563-571
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture (Communauté française de Belgique) - FRIA & grants from the Home of Rest of Horses, United Kingdom and Equine Research Funds, Belgium
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