[The combined effect of cisplatin and aclarubicin on human lymphocytes in vitro]

The combined effect of cisplatin (CDDP) and aclarubicin (ACR) which was reported to inhibit the repair of the sublethal and the potentially lethal X-ray damages, was studied with human lymphocytes. The cell kinetics during administration of CDDP or ACR were analysed by flow cytometry. CDDP at the concentration of 0.5 microgram/ml had no effect on the cell progression. ACR blocked the cell progression at G1 period at the concentrations of 100 and 200 ng/ml, but the number of dead cells was not increased. When these two agents were combined, the number of dead cells increased more than 10 times compared to that of ACR alone. In conclusion, it was found that the combination of CDDP with ACR had a synergistic effect.