Cited by 889Cancer therapeutics and mechanismsBioactive Compounds and Antitumor AgentsMetal complexes synthesis and properties

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Intercalative antitumor drugs interfere with the breakage-reunion reaction of mammalian DNA topoisomerase II

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Tewey, K M, Chen, G L, Nelson, E M, Liu, L F·1984·Journal of Biological Chemistry

DOI 10.1016/s0021-9258(17)47282-6

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Abstract

Many intercalative antitumor drugs have been shown to induce reversible protein-linked DNA breaks in cultured mammalian cells. Using purified mammalian DNA topoisomerase II, we have demonstrated that the antitumor drugs ellipticine and 2-methyl-9-hydroxyellipticine (2-Me-9-OH-E+) can produce reversible protein-linked DNA breaks in vitro. 2-Me-9-OH-E+ which is more cytotoxic toward L1210 cells and more active against experimental tumors than ellipticine is also more effective in stimulating DNA cleavage in vitro. Similar to the effect of 4'-(9-acridinylamino)-methanesulfon-m-anisidide (m-AMSA) on topoisomerase II in vitro, the mechanism of DNA breakage induced by ellipticines is most likely due to the drug stabilization of a cleavable complex formed between topoisomerase II and DNA. Protein denaturant treatment of the cleavable complex results in DNA breakage and covalent linking of one topoisomerase II subunit to each 5'-end of the cleaved DNA. Cleavage sites on pBR322 DNA produced by ellipticine or 2-Me-9-OH-E+ treatment mapped at the same positions. However, many of these cleavage sites are distinctly different from those produced by the antitumor drug m-AMSA which also targets at topoisomerase II. Our results thus suggest that although mammalian DNA topoisomerase II may be a common target of these antitumor drugs, drug-DNA-topoisomerase interactions for different antitumor drugs may be different.

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Authors: Tewey, K. M., Chen, G. L., Nelson, E. M., & Liu, L. F.
Affiliations: Johns Hopkins University (US)
ORCID: Liu, L F
Venue: Journal of Biological Chemistry
Publisher: Elsevier BV
Published: 1984-07
Volume: 259
Issue: 14
Pages: 9182-9187
ISSN: 0021-9258 (ISSN-L)
DOI: 10.1016/s0021-9258(17)47282-6
OpenAlex: W1514525963
Cited by: 887
References: 39
Citations by year: 2026: 2 · 2025: 6 · 2024: 4 · 2023: 4 · 2022: 6 · 2021: 9 · 2020: 10 · 2019: 16 · 2018: 9 · 2017: 15 · 2016: 19 · 2015: 14 · 2014: 14 · 2013: 16 · 2012: 14
FWCI: 15.02
Type: journal article
Language: en
Open access: hybrid
doi.org
Licence: cc-by
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
creativecommons.org/licenses/by/4.0/ (vor, 13270 d)
Locations: Journal of Biological Chemistry (publishedVersion, cc-by)
PubMed (publishedVersion)
Topics: Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer therapeutics and mechanisms
Life Sciences › Pharmacology, Toxicology and Pharmaceutics › Toxicology › Bioactive Compounds and Antitumor Agents
Health Sciences › Medicine › Oncology › Metal complexes synthesis and properties
Keywords: topoisomerase II, epipodophyllotoxins, etoposide, doxorubicin, cleavable complex, drug-enzyme interaction, nalidixic acid, DNA gyrase, cytotoxicity mechanism
MeSH terms: Alkaloids, Animals, Antineoplastic Agents, Cattle, DNA, DNA Topoisomerases, Type II, DNA Topoisomerases, Type I, DNA, Viral, Ellipticines, HeLa Cells, Humans, Intercalating Agents, Kinetics, Osmolar Concentration, Plasmids, Protein Binding, Thymus Gland

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Intercalative antitumor drugs interfere with the breakage-reunion reaction of mammalian DNA topoisomerase II

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