title: [DNA topoisomerase inhibitor].
abstract: DNA topoisomerases are enzymes involved in various aspects of genetic processes by catalyzing a topological change of DNA. Topoisomerase is now viewed as an important cellular target of antitumor drugs. These drugs targeting topoisomerase have been used to establish a relationship between drug-induced cleavable complex formation and cytotoxicity. Topoisomerase I is shown to be the cellular target of camptothecin and its derivatives. And topoisomerase II targeting drugs are both intercalative drugs (acridines, ellipticines, anthracyclines) and non-intercalative drugs (epipodophyllotoxin derivatives). And then Irinotecan, topotecan, sobuzoxane and IST-622 are unique topoisomerase inhibitors and are under investigation in Japan, the new antitumor drugs targeting topoisomerases are reviewed.
authors.affiliation: Fourth division of Internal Medicine, Nippon Medical School.
authors.forename: M
authors.initials: M
authors.lastname: Hino
authors.forename: H
authors.initials: H
authors.lastname: Niitani
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology; D006801:Humans; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors
chemical_list: D000970:Antineoplastic Agents; D059004:Topoisomerase I Inhibitors; D059005:Topoisomerase II Inhibitors