| Literature DB >> 7671237 |
C A Felix1, B J Lange, M R Hosler, J Fertala, M A Bjornsti.
Abstract
Human leukemias with 11q23 translocations occur sporadically and after cancer treatment with DNA topoisomerase II-targeted drugs. To investigate this process, we examined DNA topoisomerase II cleavage in vitro in subclones of the normal 11q23 genomic homologue and a t(9;11) translocation breakpoint junction. Cleavage was assayed with limiting dilutions of enzyme in the presence or absence of epipodophyllotoxin and ATP. The strongest sites of cleavage coincided with the t(9;11) breakpoint site and two other translocation breakpoint sites within the normal homologue. These results support the involvement of DNA topoisomerase II in the translocation process at chromosome band 11q23.Entities:
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Year: 1995 PMID: 7671237
Source DB: PubMed Journal: Cancer Res ISSN: 0008-5472 Impact factor: 12.701