title: Absence of correlation between chemo- and radioresistance in a range of human tumour cell lines.
abstract: The correlation between cellular resistance to radiation and to chemotherapeutic drugs has been investigated in a number of solid tumour cell lines, and preliminary results indicate no direct relationship. The acquisition of a multidrug resistance (MDR) profile by adriamycin-selected variants of a human squamous lung carcinoma, an ovarian carcinoma, a cervical carcinoma and by a colchicine-selected variant of a Chinese hamster ovarian carcinoma resulted in alterations to their radiosensitivity. However, the degree of change in the radiosensitivity of the MDR cell lines could not be predicted from their level of resistance to adriamycin. Clonal populations derived from DLKP-A, an adriamycin-selected MDR variant of the human lung carcinoma cell line DLKP, exhibited individual radiosensitivity profiles, which did not correlate with their chemoresistance. Exposure of DLKP to consecutive increasing doses of radiation did not confer cross-resistance to chemotherapeutic drugs.
authors.affiliation: National Cell and Tissue Culture Centre/BioResearch Ireland, Dublin City University, Ireland.
authors.forename: M
authors.initials: M
authors.lastname: Heenan
authors.forename: K
authors.initials: K
authors.lastname: Kavanagh
authors.forename: A
authors.initials: A
authors.lastname: Redmond
authors.forename: M
authors.initials: M
authors.lastname: Maher
authors.forename: E
authors.initials: E
authors.lastname: Dolan
authors.forename: P
authors.initials: P
authors.lastname: O'Neill
authors.forename: M
authors.initials: M
authors.lastname: Moriarty
authors.forename: M
authors.initials: M
authors.lastname: Clynes
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000494:pharmacology; D000972:Antineoplastic Agents, Phytogenic / Q000494:pharmacology; D002277:Carcinoma / Q000473:pathology; D002294:Carcinoma, Squamous Cell / Q000473:pathology; D002455:Cell Division / Q000187:drug effects / Q000528:radiation effects; D002945:Cisplatin / Q000494:pharmacology; D002999:Clone Cells / Q000473:pathology; D006224:Cricetinae; D003412:Cricetulus; D004305:Dose-Response Relationship, Drug; D004307:Dose-Response Relationship, Radiation; D004317:Doxorubicin / Q000494:pharmacology; D018432:Drug Resistance, Multiple; D019008:Drug Resistance, Neoplasm; D005047:Etoposide / Q000494:pharmacology; D005260:Female; D006367:HeLa Cells / Q000187:drug effects / Q000528:radiation effects; D006801:Humans; D007822:Laryngeal Neoplasms / Q000473:pathology; D008175:Lung Neoplasms / Q000473:pathology; D009369:Neoplasms / Q000473:pathology*; D010051:Ovarian Neoplasms / Q000473:pathology; D011836:Radiation Tolerance; D012641:Selection, Genetic; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000528:radiation effects; D002583:Uterine Cervical Neoplasms / Q000473:pathology; D014750:Vincristine / Q000494:pharmacology
chemical_list: D000903:Antibiotics, Antineoplastic; D000972:Antineoplastic Agents, Phytogenic; D014750:Vincristine; D005047:Etoposide; D004317:Doxorubicin; D002945:Cisplatin