Abstract
The mechanism of calicheamicin γ1-mediated cytotoxicity was studied in human promyelocytic HL-60 leukemic cells. Calicheamicin γ1 caused an increase in poly(ADP-ribose) polymerase activity in HL-60 cells parallel to cell death. This effect of the drug correlated with a decrease in intracellular NAD+ level. 3-Aminobenzamide, an inhibitor of poly(ADP-ribosylation), prevented the calicheamicin γ1-triggered cytotoxicity in a dose-dependent manner. Simultaneous with the reversal of cytotoxicity, the addition of 3-aminobenzamide to drug-treated cells also inhibited the increase in poly(ADP-ribosylation) and the reduction in cellular NAD+ content. These results indicate that poly(ADP-ribosylation) activation and the subsquent perturbations in NAD+-dependent metabolic reactions are associated with the cytotoxic properties of the antitumor antibiotic calicheamicin γ1.
Original language | English (US) |
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Pages (from-to) | 141-147 |
Number of pages | 7 |
Journal | Cancer Letters |
Volume | 50 |
Issue number | 2 |
DOIs | |
State | Published - Apr 20 1990 |
Keywords
- calicheamicin
- leukemia
- poly(ADP-ribosylation)
ASJC Scopus subject areas
- Oncology
- Cancer Research