Linked Life Data

2562167

Source:http://linkedlifedata.com/resource/pubmed/id/2562167

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1991-4-18
pubmed:abstractText
The cataractogenicity of naphthalene derivatives was investigated in a lens culture system that included the lens with an intact capsule and epithelium. The in vivo cataractogenicity of naphthalene, 1000 or 2000 mg/kg ip, also was evaluated in New Zealand white and Chinchilla pigmented rabbits. A dose-related brunescence was observed in lenses incubated with 1,4-naphthoquinone in concentrations from 31.6 to 316 microM. With 316 microM naphthoquinone, lenses were totally opaque within 24 hr. No lenticular opacities were observed with 1-naphthol or 2-naphthol in incubations lasting up to 96 hr. The bioactivation of naphthalene derivatives to reactive free radical intermediates by lenses in organ culture was investigated by electron spin resonance spectrometry (ESR) using the spin trap alpha-phenyl-N-t-butylnitrone (PBN). Lenses were incubated with 316 microM naphthoquinone and 100 mM PBN for 0.25, 4 or 7 hr. A spin trapped radical product with unresolved peaks was observed with 0.25 and 7 hr incubation. No radicals were detected in the 4 hr incubation, nor in control cultures lacking either the lens, naphthoquinone or PBN. In the in vivo studies, naphthalene was cataractogenic in both albino and pigmented rabbits. The in vitro results indicate that naphthoquinone can be bioactivated by rabbit lens to a reactive free radical intermediate, which may contribute to cataractogenicity.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1042-6922
pubmed:author
pubmed:issnType
Print
pubmed:volume
6
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
203-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Cataractogenicity and bioactivation of naphthalene derivatives in lens culture and in vivo.
pubmed:affiliation
Faculty of Pharmacy, University of Toronto, Ontario, Canada.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't