title: [Synergistic effect of amphotericin B and actinomycin-D against two human choriocarcinoma cell lines].
abstract: The sensitivity to actinomycin-D (Act-D) and the changes in survival rate of two human choriocarcinoma cell lines (BeWo and SCH) were studied in vitro and the following results were obtained. BeWo was shown to be more sensitive to Act-D than SCH, when the survival rate was compared in the two cell lines. 3H X Act-D uptake was 39 pmol/10(6) cells in BeWo and 12 pmol/10(6) cells in SCH after a two hours treatment. Those results suggested that the sensitivity to Act-D of choriocarcinoma cells was positively correlated with the intracellular Act-D concentration. The intracellular Act-D concentration was increased depending upon the concentrations of amphotericin B (AMB). After a two hours treatment with Act-D and AMB, the intracellular Act-D concentrations were twice in BeWo, and 2.3 times in SCH comparing with those treated with Act-D alone. The synergistic effects of Act-D and AMB on the survival rate were 1,000 times in BeWo and 100 times in SCH compared with those treated with Act-D alone. From the above, combination therapy with Act-D and AMB was supposed to be one of the trial methods in the treatment of drug resistant choriocarcinoma.
mesh_terms: D000666:Amphotericin B / Q000008:administration & dosage / Q000494:pharmacology*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D002822:Choriocarcinoma / Q000473:pathology*; D003114:Colony-Forming Units Assay; D003609:Dactinomycin / Q000008:administration & dosage / Q000494:pharmacology*; D004353:Drug Evaluation, Preclinical; D004357:Drug Synergism; D006801:Humans; D008297:Male; D013274:Stomach Neoplasms / Q000473:pathology*; D014410:Tumor Stem Cell Assay
chemical_list: D003609:Dactinomycin; D000666:Amphotericin B