Linked Life Data

17515324

Source:http://linkedlifedata.com/resource/pubmed/id/17515324

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2007-5-22
pubmed:abstractText
Topoisomerase II is ATP dependent enzyme that catalyzes DNA strand passage, the pivotal process in replication, transcription, recombination etc. As part of this breakage and religation process the intermediate generated is a cleavable complex between DNA and topoisomerase II. This complex is the target for topoisomerase II inhibitors like epipodophyllotoxins, actinomycin D or anthracyclines. Stabilization of cleavable complexes by the topoisomerase II inhibitors leading to DNA lesions and next to apoptosis is the most common mechanism of drug resistance reflected in reduced formation of the complexes due to decreased amounts and/or activity of topoisomerase II. The aim of this study was to characterize human melanoma and human cervix carcinoma cells differing in sensitivity to doxorubicin and anthracycline analogs, annamycin and WP903 for topoisomerase IIalpha protein and gene expression with use of Western blot and RT- PCR. As shown, no significant differences in topoisomerase IIalpha protein level were noted between the cell lines tested. These results were confirmed at the gene expression level. The current study points to the fact that topoisomerase IIalpha protein or gene expression are not the reliable marker of cell sensitivity to anthracyclines but these observations do not exclude the potential mutations in topoisomerase IIalpha gene or some postranslational changes in that protein which requires further studies.
pubmed:commentsCorrections
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0001-6837
pubmed:author
pubmed:issnType
Print
pubmed:volume
63
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
15-8
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:articleTitle
Topoisomerase II alpha expression and cytotoxicity of anthracyclines in human neoplastic cells.
pubmed:affiliation
National Institute of Public Health, Department of Biochemistry and Biopharmaceuticals, 30/34 Che?mska Str., 00-725 Warsaw. b-gruber@il.waw.pl
pubmed:publicationType
Journal Article