Betulinic acid, a catalytic inhibitor of topoisomerase I, inhibits reactive oxygen species-mediated apoptotic topoisomerase I-DNA cleavable complex formation in prostate cancer cells but does not affect the process of cell death.


The ubiquitious enzyme topoisomerase I can be targeted by drugs which turn these enzymes into cellular poisons and subsequently induce cell death. Drugs like staurosporine, which do not target topoisomerase I directly, can also lead to stabilization of topoisomerase I-DNA cleavable complexes by an indirect process of reactive oxygen species (ROS) generation… (More)


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