Linked Life Data

2909866

Source:http://linkedlifedata.com/resource/pubmed/id/2909866

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1989-2-8
pubmed:abstractText
We have studied the mutagenic effects of benzo[a]pyrene (BP) administered in a long-term, low-dose fashion to metabolically competent human lymphoblastoid cells. A continuous dose as low as 0.02 microM for 20 days produced a significant increase in mutant fraction at the 6TG-resistance (HGPRT) locus. The slope of the mutant fraction over time in the 0.02 microM BP-treated culture was twice that observed in the untreated concurrent control; 0.02 microM therefore represents the doubling dose of BP for gene mutation in this cell line. For higher doses of 0.1, 0.5 or 1 microM BP, the rate (or efficiency) of induced mutation was considerably higher for the first 5 or 6 days of exposure than for the last 14-15. This did not appear to be due to a growth disadvantage against early-arising mutants. Comparison to previously published data in the same cell system (Crespi and Thilly, 1984) revealed that the long-term , low-dose protocol (0-1 microM for up to 20 days) was significantly more efficient at inducing mutations than a short-term, high-dose protocol (0-10 microM for 1 day).
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0027-5107
pubmed:author
pubmed:issnType
Print
pubmed:volume
210
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
143-7
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Long-term, low-dose benzo[a]pyrene-induced mutation in human lymphoblasts competent in xenobiotic metabolism.
pubmed:affiliation
Center for Environmental Health Sciences, Massachusetts Institute of Technology, Cambridge 02139.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.