| ATO | arsenic trioxide |
| VPA | valproic acid |
| ATO/VPA | arsenic trioxide and valproic acid; NSCLC, non-small cell lung cancer; SCLC, small cell lung cancer |
| APL | acute promyelocytic leukemia |
| PARP-1 | anti-poly ADP ribose polymerase-1; FITC, fluorescein isothiocyanate |
| MTT | 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide |
| Z-VAD | benzyloxycarbonyl-Val-Ala-Asp-fluoromethylketone |
| MMP | mitochondrial membrane potential (∆Ψm) |