Linked Life Data

3967028

Source:http://linkedlifedata.com/resource/pubmed/id/3967028

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1985-3-7
pubmed:abstractText
We examined the possible role of calmodulin in the excision repair of ultraviolet light-induced pyrimidine dimers in damaged DNA by means of specialized assay systems. These assays included bromodeoxyuridine photolysis, dimer chromatography and cytosine arabinoside incorporation in conjunction with hydroxyurea. The calmodulin antagonist, trifluoperazine, and the calcium-chelating agent, EGTA, were employed to ascertain what affect calmodulin played in the repair process. Normal human fibroblast cells were used in all studies described in this report. After exposure to 10 J/m2 of 254 nm light, we observed a decrease of about 30% in the number of single-strand breaks produced in the presence of 25 microM trifluoperazine (1.9 vs. 3.3) in controls although the numbers of bases re-inserted in the repaired regions were similar (64 vs. 72). Measurement of thymine-containing dimers remaining throughout a 24 h time period indicated a 30% difference in the excision of dimers when tested with either EGTA or trifluoperazine. We also observed a significant decrease in the number of cytosine arabinoside arrested repair sites in the presence of either EGTA or trifluoperazine. The results are discussed with relation to the possibility of calmodulin altering the initial incision by repair endonuclease.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0006-3002
pubmed:author
pubmed:issnType
Print
pubmed:day
29
pubmed:volume
824
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
34-9
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Inhibition of DNA repair by trifluoperazine.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.