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

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

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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Crossref · 10.1016/s0021-9258(17)47282-6

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  • Anthracyclines exert antitumor activity mainly by inhibiting topoisomerase II.

    “Anthracyclines are among the most widely used antitumor antibiotics in the clinic and exert antitumor activity mainly by inhibiting topoisomerase II [215,216,217,218,219].”

    From Marine Natural Products: A Source of Novel Anticancer Drugs (2019) · cites this paper as [215]

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Authors
Tewey, K. M., Chen, G. L., Nelson, E. M., & Liu, L. F.
Affiliations
Johns Hopkins University (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1984-07
Volume
259
Issue
14
Pages
9182-9187
ISSN
0021-9258 (ISSN-L)
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
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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