Comparison of human tumour cell responses to cisplatin and ZD0473 with and without irradiation.
Three pairs of human tumour cell lines, with one line of each pair resistant to cisplatin, were used to compare the effects of cisplatin and ZD0473 on cellular toxicity and radiosensitization. Whilst all three cell line pairs had one line that was resistant to cisplatin, for ZD0473 the lung tumour HTB56cp and cervical carcinoma ME180 cell lines did not express resistance to their HTB56 and SHA counterparts, respectively. Only the ovarian carcinoma line A2780cp showed resistance to ZD0473 compared to its counterpart A2780S. For radiosensitization both cisplatin and ZD0473 show additive and subadditive effects in the ovarian carcinoma lines, and additive and superadditive effects in the cervical carcinoma and lung tumour cell lines. In fact in the lung tumour cell lines ZD0473 appeared to be a more effective radiosensitizer than cisplatin.
Raaphorst
G P
GP
Ottawa Regional Cancer Centre, 503 Smyth Rd., Ottawa, Ontario K1H 1C4, Canada. graaphorst@orcc.on.ca
Yang
D P
DP
Li
L F
LF
Malone
S
S
D000230:Adenocarcinoma / Q000188:drug therapy / Q000532:radiotherapy; D000970:Antineoplastic Agents / Q000494:pharmacology*; D045744:Cell Line, Tumor; D002945:Cisplatin / Q000494:pharmacology*; D003131:Combined Modality Therapy; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy / Q000532:radiotherapy; D009369:Neoplasms / Q000188:drug therapy* / Q000532:radiotherapy*; D009944:Organoplatinum Compounds / Q000494:pharmacology*; D010051:Ovarian Neoplasms / Q000188:drug therapy / Q000532:radiotherapy; D011838:Radiation-Sensitizing Agents / Q000494:pharmacology*; D002583:Uterine Cervical Neoplasms / Q000188:drug therapy / Q000532:radiotherapy
D000970:Antineoplastic Agents; D009944:Organoplatinum Compounds; D011838:Radiation-Sensitizing Agents; C110525:amminedichloro(2-methylpyridine)platinum(II); D002945:Cisplatin