Linked Life Data

8582664

Source:http://linkedlifedata.com/resource/pubmed/id/8582664

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1996-3-21
pubmed:abstractText
The effects of the partial pressure of oxygen (pO2) on antioxidant efficiency of beta-carotene in inhibiting 2,2'-azobis(2-amindinopropane) (AAPH)-induced lipid peroxidation are investigated in rat liver microsomal membranes. The rate of peroxyl radicals generated by thermolysis of AAPH at 37 degrees C is markedly higher at 150 than 760 mm Hg pO2. At 150 mm Hg Po2 beta-carotene acts as an antioxidant, inhibiting 2,2'-azobis(2-amidinopropane) 9AAPH0-induced Malonidaldehyde (MDA) formation. At 760 mm Hg Po2, it loses its antioxidant activity and shows a prooxidant effect, increasing lipid peroxidation products. alpha-Tocopherol prevents the prooxidant effect of beta-carotene in a dose-dependent manner. Our data provide the first evidence of a prooxidant effect of beta-carotene under 100% oxygen pressure in a biological membrane model and point out the existence of cooperative interactions between beta-carotene and alpha-tocopherol.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0891-5849
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
887-92
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Prooxidant activity of beta-carotene under 100% oxygen pressure in rat liver microsomes.
pubmed:affiliation
Institute of General Pathology, Catholic University, Rome, Italy.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't