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Cancer Resistance to Type II Topoisomerase Inhibitors

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Type II topoisomerases (TOPO2) are ubiquitously expressed enzymes that overcome topological problems in genomic DNA, which can result from DNA replication, transcription and repair. The class of compounds targeting TOPO2 includes some of the most active chemotherapy agents currently available for the treatment of patients with different cancer types. Therefore, understanding of the molecular mechanisms underlying resistance to these drugs is of pivotal importance to improve their efficacy and ultimately increase the life expectancy of cancer patients. The first aim of this review is to summarize the molecular biology of TOPO2 inhibitors, which is the key to understand cancer resistance to them; the second part of this work is dedicated to overview and discuss the available evidence on the mechanisms of resistance to these drugs, with special attention to the strategies that might be useful to circumvent this phenomenon on the clinical ground.
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Keywords: Cancer; DNA repair; Type II topoisomerases; biology of TOPO2 inhibitors; chemoresistance; chemotherapy; drugs; genomic DNA; topoisomerase; ubiquitously expressed enzymes

Document Type: Research Article

Publication date: 01 August 2012

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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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