Linked Life Data

1879406

Source:http://linkedlifedata.com/resource/pubmed/id/1879406

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1991-10-1
pubmed:abstractText
In order to determine the relationships among the reduction in relative cloning efficiency (RCE), sister-chromatid exchange (SCE) formation, and interference with progression through the cell-cycle, human teratocarcinoma-derived (P3) cells were exposed to either ethyl methanesulfonate or to methyl methanesulfonate. The relationship between SCE and toxicity was quantified, the progression through the cell-cycle was evaluated with flow cytometric methods, and the effects of these chemicals on cell growth and average generation time (AGT) were determined. A strong correlation existed between RCE and SCE (r = -0.978, p less than .001) which was accompanied by an inhibition of growth as evidenced by a significant (p less than .0001) negative linear effect of concentration on the relative cell count from 24 to 72 hours after exposure and by a concentration-dependent increase (p less than .0001) in the AGT. Delays in the transit through S-phase were evident 4 hours after exposure to toxic concentrations of either carcinogen and by 8 to 12 hours post-exposure at the lower concentrations. Increases in the percentage of nuclei in G2 + M, indicative of G2 arrest, occurred from 12 to 24 hours after exposure. One interpretation of these results is that those effects of EMS and MMS exposure which result in S-phase delay and G2 arrest may be those elements common to the induction of SCE and cellular toxicity.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0893-6692
pubmed:author
pubmed:issnType
Print
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
139-49
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Flow cytometric evaluation of cell-cycle progression in ethyl methanesulfonate and methyl methanesulfonate-exposed P3 cells: relationship to the induction of sister-chromatid exchanges and cellular toxicity.
pubmed:affiliation
Division of Genetic Toxicology, Food and Drug Administration, National Center for Toxicological Research, Jefferson, Arkansas 72079.
pubmed:publicationType
Journal Article, In Vitro