title: The cytotoxic activity of cisplatin, carboplatin and teniposide alone and combined determined on four human small cell lung cancer cell lines by the clonogenic assay.
abstract: Using the clonogenic assay to compare the cytotoxic activity of cisplatin and carboplatin on four human small cell lung cancer cell lines, cisplatin was shown to be equally or more potent than carboplatin at equitoxic doses with 1 h incubation. Increased potency of carboplatin was revealed when the drugs were tested with continuous incubation, although cisplatin still was the most potent drug when compared on a microgram to microgram basis. This relative increase in potency of carboplatin can at least partly be explained by the development of a more reactive form of the drug when stored in tissue culture medium. By combining either cisplatin or carboplatin with teniposide additive cell kill was obtained. Additivity was also obtained when cisplatin was combined with carboplatin. Since the two drugs have a different toxicity pattern a clinical synergy may be obtained by combined use of these two analogues.
authors.affiliation: Department of Oncology B, Finsen Institute, Copenhagen, Denmark.
authors.forename: H
authors.initials: H
authors.lastname: Roed
authors.forename: L L
authors.initials: LL
authors.lastname: Vindeløv
authors.forename: I J
authors.initials: IJ
authors.lastname: Christensen
authors.forename: M
authors.initials: M
authors.lastname: Spang-Thomsen
authors.forename: H H
authors.initials: HH
authors.lastname: Hansen
mesh_terms: D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use*; D016190:Carboplatin; D018288:Carcinoma, Small Cell / Q000188:drug therapy*; D002470:Cell Survival / Q000187:drug effects; D002945:Cisplatin / Q000008:administration & dosage; D004305:Dose-Response Relationship, Drug; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy*; D009944:Organoplatinum Compounds / Q000008:administration & dosage; D013713:Teniposide / Q000008:administration & dosage; D014407:Tumor Cells, Cultured / Q000187:drug effects; D014410:Tumor Stem Cell Assay
chemical_list: D009944:Organoplatinum Compounds; D013713:Teniposide; D016190:Carboplatin; D002945:Cisplatin