title: Effect of temperature on the cytotoxicity of vindesine, amsacrine, and mitoxantrone.
abstract: The effect of elevated temperature on the cytotoxicity of three new anticancer drugs (vindesine, mitoxantrone, and amsacrine [AMSA]) was tested in Chinese hamster ovary cells in vitro. Three distinct patterns of interaction with hyperthermia were observed. Vindesine, tested at 37 degrees C, produced a 50% cell kill when concentrations of greater than or equal to 1.0 micrograms/ml (up to 3.0 micrograms/ml) for 1 hour were used. At 42.4 degrees C, concentrations greater than 1.0 micrograms/ml for 1 hour caused a 60% cell kill (an additive cytotoxic effect). Mitoxantrone produced concentration-dependent lethality at 37 degrees C (89% cell kill after 0.25 micrograms/ml for 1 hour; 99% cell kill after 1.0 micrograms/ml for 1 hour). Exposure to mitoxantrone at 42.4 degrees C resulted in synergistic cytotoxicity (97% cell kill after 0.25 micrograms/ml for 1 hour; 99.98% cell kill after 1.0 micrograms/ml for 1 hour). In contrast, treatment with AMSA at 42.4 degrees C inhibited cytotoxicity (99.98% cell kill after 5 micrograms/ml for 1 hour at 37 degrees C; 91% cell kill after 5 micrograms/ml for 1 hour at 42.4 degrees C). AMSA was not inactivated after being heated at 42.4 degrees C for 1 hour prior to treatment of cells at 37 degrees C.
mesh_terms: D000609:Aminoacridines / Q000633:toxicity*; D000677:Amsacrine; D000818:Animals; D000880:Anthraquinones / Q000633:toxicity*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D006224:Cricetinae; D003412:Cricetulus; D004305:Dose-Response Relationship, Drug; D006358:Hot Temperature; D008942:Mitoxantrone; D014747:Vinblastine / Q000031:analogs & derivatives* / Q000633:toxicity; D014751:Vindesine
chemical_list: D000609:Aminoacridines; D000880:Anthraquinones; D000677:Amsacrine; D014747:Vinblastine; D008942:Mitoxantrone; D014751:Vindesine