Description
Iniparib was initially discovered as an inhibitor of poly(ADP-ribose) polymerase (PARP 1), but has since been found to only weakly modulate PARP in an indirect manner. The exact mechanism of iniparib is unknown, but it is known to form adducts with cysteine-containing proteins. In vitro, iniparib inhibited single-stranded DNA break repair mechanisms. Clinical trials of this compound have shown mixed results in the treatment of cancers.