Does hydrostatic pressure have an effect on reactive oxygen species in the eel?

Abstract : Eels are submitted to hydrostatic pressure (HP) during their spawning migration (about 6000 Km). Before migration, they change from the yellow to the silver stage (silvering process). The effects of HP in relation to the silvering process have been studied on aerobic metabolism and more precisely on reactive oxygen species (ROS) metabolism. HP acclimatization of yellow eels improves oxidative phosphorylation together with supposed concomitant changes in electron leak and ROS production. Therefore hydroxyl radical (OH*) production, superoxyde dismutase and catalase activities, malondialdehyde content and in parallel oxygen consumption were measured in the red muscle of long-term pressure exposed and control group yellow and silver eels. At atmospheric pressure, yellow eels exhibited significantly higher oxygen consumption and OH* production than silver eels; and significantly lower malondialdehyde content. This could be due to the increase in membrane fluidity induced by the silvering process. Long-term HP exposure decreases yellow eel oxygen consumption which becomes similar to that of the silver stage. In parallel there is a decrease in OH* production and concomitantly antioxidant enzyme activities follow the same tendency. Thus the respiratory chain improvement in pressure acclimatized yellow eels is accompanied by a ROS production decrease which could mean an electron leak decrease.
Type de document :
Article dans une revue
Undersea and Hyperbaric Medicine, Undersea and Hyperbaric Medical Society, Inc., 2006, 33 (3), pp.157-60
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http://hal.univ-brest.fr/hal-00750452
Contributeur : François Guerrero <>
Soumis le : vendredi 9 novembre 2012 - 23:37:50
Dernière modification le : jeudi 13 septembre 2018 - 15:17:14

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  • HAL Id : hal-00750452, version 1
  • PUBMED : 16869528

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A. Amérand, A. Vettier, P. Sébert, C. Moisan. Does hydrostatic pressure have an effect on reactive oxygen species in the eel?. Undersea and Hyperbaric Medicine, Undersea and Hyperbaric Medical Society, Inc., 2006, 33 (3), pp.157-60. 〈hal-00750452〉

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