Linked Life Data

16115541

Source:http://linkedlifedata.com/resource/pubmed/id/16115541

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2005-8-23
pubmed:abstractText
The interrelationship between physical exercise, antioxidant supplementation, oxidative stress and plasma levels of homocysteine (Hcy) has not been adequately examined. The purpose of this study was to examine the effect of 2 months of vitamin E supplementation (800 IU/day alpha-tocopherol) (E) or placebo (P) in 38 triathletes on plasma Hcy concentrations, antioxidant potential and oxidative stress. It was hypothesized that vitamin E supplementation would reduce plasma Hcy and oxidative stress markers compared to placebo. Blood samples were collected 1 day prior to the race, immediately postrace and 1.5 h postrace. Plasma alpha-tocopherol was 75% higher (P<.001) in E versus P prerace (24.1+/-1.1 and 13.8+/-1.1 micromol/L, respectively), and this group difference was maintained throughout the race. Cortisol was significantly increased in both E and P (P<.001), but there was no difference in the pattern of change. There were no significant time, group or interaction effects on plasma Hcy concentrations between E and P. Plasma F(2)-isoprostanes increased 181% versus 97% during the race in E versus P, and lipid hydroperoxides were significantly elevated (P=.009) 1.5 h postrace in E versus P. Plasma antioxidant potential was significantly higher 1.5 h postrace in E versus P (P=.039). This study indicates that prolonged large doses of alpha-tocopherol supplementation did not affect plasma Hcy concentrations and exhibited pro-oxidant characteristics in highly trained athletes during exhaustive exercise.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0955-2863
pubmed:author
pubmed:issnType
Print
pubmed:volume
16
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
530-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Effect of alpha-tocopherol supplementation on plasma homocysteine and oxidative stress in highly trained athletes before and after exhaustive exercise.
pubmed:affiliation
Department of Health, Leisure, and Exercise Science, Appalachian State University, Boone, NC 28608, USA. mcanltysr@appstate.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural