title: Reduction of cis-dichlorodiammineplatinum-induced cell inactivation by benzaldehyde.
abstract: The inactivating effect of a combined treatment of human cells (NHIK 3025) in culture with cis-dichlorodiammineplatinum(II) (cis-DDP) and the protein synthesis inhibitor benzaldehyde was tested. Cell inactivation was measured as loss of colony-forming ability following drug treatment. While 3.2 mM benzaldehyde had no effect on the cell survival when given alone, it reduced the effect of 10 microM cis-DDP significantly when the two drugs were added simultaneously. Scheduling experiments indicate that benzaldehyde must be present immediately before addition of, or simultaneously with, cis-DDP for optimal reduction of cell inactivation. Benzoic acid, benzyl alcohol or the protein synthesis inhibitor cycloheximide did not reduce the inactivating effect of cis-DDP. Cells synchronized by mitotic selection were used to determine the variation in the responses throughout the cell cycle. It was found that concomitant 2-hr treatment of synchronized cells with 3.2 mM benzaldehyde and 10 microM cis-DDP at various times during the cell cycle resulted in a consistently greater surviving fraction of cells than 10 microM cis-DDP alone. Benzaldehyde thus reduced the inactivating effect of cis-DDP in all phases of the cell cycle. The effect of benzaldehyde in combination with two alkylating agents, 1,3-bis(2-chloroethyl)-1-nitrosourea (BCNU) and nitrogen mustard (HN2), was also studied. Benzaldehyde was not found to influence the effects on cell survival induced by these drugs.
mesh_terms: D001547:Benzaldehydes / Q000494:pharmacology*; D001565:Benzoates / Q000494:pharmacology; D019817:Benzoic Acid; D019905:Benzyl Alcohol; D001592:Benzyl Alcohols / Q000494:pharmacology; D002453:Cell Cycle / Q000187:drug effects; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects*; D002945:Cisplatin / Q000494:pharmacology*; D003513:Cycloheximide / Q000494:pharmacology; D005260:Female; D006801:Humans; D002583:Uterine Cervical Neoplasms / Q000473:pathology
chemical_list: D001547:Benzaldehydes; D001565:Benzoates; D001592:Benzyl Alcohols; D019817:Benzoic Acid; D003513:Cycloheximide; D019905:Benzyl Alcohol; D002945:Cisplatin; C032175:benzaldehyde