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CELLULAR AND MOLECULAR BIOLOGY

Inhibition of Poly(ADP-Ribose) Polymerase (PARP) Induces Apoptosis in Lung Cancer Cell Lines

, , , , , & show all
Pages 608-616 | Published online: 19 Oct 2011
 

Abstract

We have tested PJ34, a potent inhibitor of poly(ADP-ribose) polymerase (PARP), against various lung cancer cell lines (Calu-6, A549, and H460) and normal human bronchial epithelial cells (HBECs). While using WST1 dye assay, lung cancer cells exhibited LD50 values of approximately 30 μM PJ34 (72-hr assay). Molecular data showed that the effect of PJ34-induced apoptosis on lung cancer cells occurs via a caspase-dependent pathway. The present study has clearly shown that (a) PARP inhibitor can independently kill tumor cells, (b) caspase-3 has modest influence on PARP-inhibitor-mediated cancer-specific toxicity, and (c) a pan-caspase inhibitor decreases the apoptotic effect of PJ34.

ACKNOWLEDGMENTS

We thank Dr. Daniel Johnson for reviewing the manuscript.

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