Linked Life Data

7188884

Source:http://linkedlifedata.com/resource/pubmed/id/7188884

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1980-5-23
pubmed:abstractText
Rat hepatocyte cultures (RL-PR-C) were tested with the (+)- or (-)-trans-7,8-dihydrodiol isomers of benzo(a)pyrene [B(a)P] and were assessed for growth inhibition, chromosomal damage, growth in soft agar, and tumor formation. Because early-passage cells have a noninducible low specific activity, aryl hydrocarbon hydroxylase parallel inhibition studies were performed on aryl hydrocarbon hydroxylase-inducible late-passage cultures. Early-passage cells exhibited little inhibition in the presence of B(a)P or either isomer. Comparable later-passage cells demonstrated inhibitory effects with B(a)P and the (+)- and (-)-trans-7,8-dihydrodiol metabolites. No treated cultures grew in soft agar, and the modal number of chromosomes was unaffected by carcinogen treatment. However, both (+) and (-) isomer-treated early-passage cells formed tumors in isogeneic animals, the (+) isomer being more efficient in this regard. These results indicate that noninhibitory doses of either the (+)- or (-)-trans-7,8-dihydrodiol isomer of B(a)P are nonetheless capable of malignantly transforming hepatocyte cells in vitro.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0008-5472
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1281-5
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1980
pubmed:articleTitle
Malignant transformation of cultured rat hepatocytes by (+)- and (-)-trans-7,8-dihydro-7,8-dihydroxybenzo(a)pyrene.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.