Contrasting cytotoxic mechanisms of similar antitumour diaziridinylbenzoquinones.
Affiliation
Department of Biophysical Chemistry, Paterson Institute for Cancer Research, Christie Hospital and Holt Radium Institute, Manchester, U.K.Issue Date
1990
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The mechanisms of cytotoxicity of the antitumour diaziridinylbenzoquinones, AZQ and BZQ, have been investigated. HPLC analysis has been used to study the products as well as the rate of decomposition of acid-assisted ring-opening in aqueous medium as a function of pH. Microconcentrators with a molecular weight cutoff of 30 kDa were utilised to study the covalent binding of both compounds to calf thymus DNA. Radical production of both compounds in K562 cell incubations was followed using ESR and their uptake into K562 cells was monitored using radiolabelled compounds. The results show that these two diaziridinylbenzoquinones, although very similar in structure, have diverse mechanisms of cytotoxicity. The implications of these findings are discussed in the light of antitumor action.Citation
Contrasting cytotoxic mechanisms of similar antitumour diaziridinylbenzoquinones. 1990, 8 (4-6):231-9 Free Radic. Res. Commun.Journal
Free Radical Research CommunicationsDOI
10.3109/10715769009053356PubMed ID
2162311Type
ArticleLanguage
enISSN
8755-0199ae974a485f413a2113503eed53cd6c53
10.3109/10715769009053356
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