Article
Transfection of 9-hydroxyellipticine-resistant Chinese hamster fibroblasts with human topoisomerase IIalpha cDNA: selective restoration of the sensitivity to DNA religation inhibitors.
Cancer research - 1 Oct 1999
Khélifa T, René B, Le Mée S, Lambert B, Saucier J M, Markovits J, Jacquemin-Sablon H, Jacquemin-Sablon A
Abstract excerpt
In the Chinese hamster lung cell line DC-3F/9-OH-E, selected for resistance to 9-OH-ellipticine and cross-resistant to other topoisomerase II inhibitors, the amount of topoisomerase IIalpha is 4-5-fold lower than in the parental DC-3F cells, whereas topoisomerase IIbeta is undetectable. Cloning and sequencing of topoisomerase IIalpha cDNAs from DC-3F and DC-3F/9-OH-E cells revealed an allele polymorphism, one...
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