title: A comparison of adriamycin and mAMSA in vitro: cell lethality and SCE studies.
abstract: We have compared the actions of ADM and mAMSA in Chinese hamster V79 cells in vitro, using cell survival and sister-chromatid exchange as end-points. Equimolar concentrations of ADM and mAMSA show similar toxicities to exponentially growing cells, and both drugs are less effective in killing chronically hypoxic and plateau-phase cells. Cytotoxicity to thermotolerant cells (41 degrees C for 16 h previously) shows little difference from that for exponential cells. Pre-treating cells with misonidazole under hypoxic conditions reduces the toxicity of both ADM and mAMSA. In addition, an ADM-resistant Chinese hamster cell line, 77A-177, was cross-resistant to mAMSA. Finally, low equimolar sub-toxic doses of both drugs were found to cause similar increases in the levels of sister-chromatid exchanges in V79 cells. These results reveal no major difference in activity between ADM and mAMSA in vitro.
mesh_terms: D000609:Aminoacridines / Q000494:pharmacology*; D000677:Amsacrine; D000818:Animals; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects*; D006224:Cricetinae; D003412:Cricetulus; D003434:Crossing Over, Genetic / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000494:pharmacology*; D006358:Hot Temperature; D007364:Intercalating Agents / Q000494:pharmacology*; D008920:Misonidazole / Q000494:pharmacology; D010100:Oxygen; D012854:Sister Chromatid Exchange / Q000187:drug effects*
chemical_list: D000609:Aminoacridines; D007364:Intercalating Agents; D000677:Amsacrine; D004317:Doxorubicin; D008920:Misonidazole; D010100:Oxygen