Linked Life Data

2373173

Source:http://linkedlifedata.com/resource/pubmed/id/2373173

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1990-8-28
pubmed:abstractText
Perfusion of the bovine eye with a buffer solution containing t-butyl hydroperoxide and the glutathione reductase inhibitor nitrofurantoin caused significant decreases in reduced glutathione level in ciliary body and iris. The result was interpreted to suggest that the organic hydroperoxide was decomposed by the glutathione peroxidase-reductase system. The glutathione reductase reaction requires NADPH. Since the level of NADPH is maintained by the hexose monophosphate shunt in many tissues, we investigated whether this is also the case with bovine uveal tissues. CO2 formation from [1-14C]glucose but not from [6-14C]glucose was markedly stimulated by t-butyl hydroperoxide and was inhibited by the glutathione reductase inhibitor 1,3-bis(2-chloroethyl)-1-nitrosourea, thus supporting the importance of the hexose monophosphate shunt for hydroperoxide decomposition through the glutathione peroxidase-reductase system. The peroxidase-reductase activity was found both in non-pigmented and pigmented ciliary epithelial cells in culture. Purification studies isolated two forms of glutathione reductase [GR I (140 kDa) with subunit Mr of 70 kDa and GR II (greater than 670 kDa) with subunit Mr of 45 kDa] and a novel glutathione peroxidase (112 kDa with subunit Mr of 29 kDa). The peroxidase is active both with H2O2 and organic hydroperoxides, does not contain selenium and shows no glutathione S-transferase activity.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0014-4835
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
813-8
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Glutathione-dependent detoxification of peroxide in bovine ciliary body.
pubmed:affiliation
Kresge Eye Institute, Department of Ophthalmology, Wayne State University School of Medicine, Detroit, MI 48201.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.