Document Detail

Does hydrostatic pressure have an effect on reactive oxygen species in the eel?
MedLine Citation:
PMID:  16869528     Owner:  NLM     Status:  MEDLINE    
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.
A Amérand; A Vettier; P Sébert; C Moisan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Undersea & hyperbaric medicine : journal of the Undersea and Hyperbaric Medical Society, Inc     Volume:  33     ISSN:  1066-2936     ISO Abbreviation:  Undersea Hyperb Med     Publication Date:    2006 May-Jun
Date Detail:
Created Date:  2006-07-27     Completed Date:  2006-08-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9312954     Medline TA:  Undersea Hyperb Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  157-60     Citation Subset:  IM; S    
UHPM-UPCI- EA3879, Faculty of Medicine, CS 93837 29238 Brest 3, France.
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MeSH Terms
Acclimatization / physiology*
Catalase / metabolism
Eels / physiology*
Hydrostatic Pressure
Hydroxyl Radical / metabolism
Oxygen Consumption / physiology*
Reactive Oxygen Species / metabolism*
Superoxide Dismutase / metabolism
Reg. No./Substance:
0/Reactive Oxygen Species; 3352-57-6/Hydroxyl Radical; EC; EC Dismutase

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

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