Linked Life Data

1922155

Source:http://linkedlifedata.com/resource/pubmed/id/1922155

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1991-11-15
pubmed:abstractText
We examined the effect of the oxidation of plasmid pZ189 by KMnO4, which does not produce free radicals, and H2O2/Fe(2+)-diethylenetriaminepentaacetic acid (DTPA), which does, on the mutation frequency of pZ189 transfected into monkey kidney CV-1 cells. Treatment with 1.5 mM KMnO4 increased the content of certain modified bases, principally Thy and Cyt modified at C-5 and C-6, by up to 300-fold, as measured by GC/MS; however, the mutation frequency increased only 5-fold above background. 1.0 mM H2O2/0.1 mM Fe(2+)-DTPA treatment, which increased the mutation frequency 10-fold above background, increased the content of certain modified bases by up to 4-fold. Sequence analysis revealed both deletions and point mutations, with a predominance of C-G substitutions, among H2O2/Fe(2+)-DTPA-associated mutations. These data suggest that KMnO4-modified DNA is only weakly mutagenic in DNA replicating in mammalian nuclei, despite substantial production of Thy glycol and other base modifications, whereas H2O2/Fe(2+)-DTPA-modified DNA is more mutagenic. H2O2/Fe(2+)-DTPA generated mutations occur predominantly at C-G base pairs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0027-5107
pubmed:author
pubmed:issnType
Print
pubmed:volume
261
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
123-30
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Mutation of potassium permanganate- and hydrogen peroxide-treated plasmid pZ189 replicating in CV-1 monkey kidney cells.
pubmed:affiliation
Department of Medical Oncology and Therapeutics Research, City of Hope National Medical Center, Duarte, CA 91010.
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.