Prevention of adriamycin-induced interphase death by 3-aminobenzamide and nicotinamide in a human promyelocytic leukemia cell line

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Summary

Adriamycin caused significant interphase death in HL-60 cells during six hours of incubation, which was abolished by the poly-(ADP-ribose) polymerase inhibitors, 3-aminobenzamide or nicotinamide. Neither agent changed adriamycin uptake by HL-60 cells. Although 3-aminobenzamide did not alter the number of DNA strand breaks caused by adriamycin, it prevented adriamycin-induced depletion of intracellular NAD+ and ATP, and maintained energy charge. These findings suggest that the activation of poly(ADP-ribose) synthesis plays an important role in the adriamycin-induced interphase death of proliferating HL-60 cells.

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