1991
DOI: 10.1172/jci115080
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Acquired cisplatin resistance in human ovarian cancer cells is associated with enhanced repair of cisplatin-DNA lesions and reduced drug accumulation.

Abstract: Studies were undertaken to investigate acquired resistance to cisplatin in human ovarian cancer cells. The cell lines A2780 and A2780/CP70 were studied to assess their respective characteristics of drug accumulation and efflux, cytosolic inactivation of drug, and DNA repair. All experiments were performed using 1-h drug exposures. The A2780/CP70 cell line was 13-fold more resistant to cisplatin than A2780 cells. When studied at their respective IC50 doses, drug accumulation rates were similar for the two cell … Show more

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Cited by 265 publications
(198 citation statements)
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“…Several molecules have been implicated in cisplatin resistance, including decreased cellular detoxication (3,4), increased DNA repair (5), and mutations of p53 tumor suppressor gene (6,7). However, the mechanisms involved in cisplatin resistance are still poorly understood.…”
mentioning
confidence: 99%
“…Several molecules have been implicated in cisplatin resistance, including decreased cellular detoxication (3,4), increased DNA repair (5), and mutations of p53 tumor suppressor gene (6,7). However, the mechanisms involved in cisplatin resistance are still poorly understood.…”
mentioning
confidence: 99%
“…Second, the assay measures the ability of the repair systems to complete all steps in the process and actually generate a functional protein. Third, the reporter gene reactivation assay has previously been validated for cisplatin adduct repair (Sheibani et al, 1989;Jennerwein et al, 1991;Parker et al, 1991;Ali-Osman et al, 1994). One limitation of this assay system is that it reflects repair processes occurring in an extrachromosomal segment of DNA rather than in an endogenous gene.…”
Section: Discussionmentioning
confidence: 99%
“…This has been attributed to both enhancement of DNA repair efficiencies [47] and cellular antioxidant potential [48]. Firstly, in order to identify differences in cisplatin resistance in cell line models used here, we exposed PEO1 and PEO4 ovarian cancer cell lines to varying concentrations of cisplatin for 24h.…”
Section: Cisplatin Induced Cytotoxicity Is Partially Relieved By Neutmentioning
confidence: 99%