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. 2002 Jul 12;297(5579):259-63.
doi: 10.1126/science.1072221.

Mediation of poly(ADP-ribose) polymerase-1-dependent cell death by apoptosis-inducing factor

Seong-Woon Yu  1 , Hongmin Wang, Marc F Poitras, Carmen Coombs, William J Bowers, Howard J Federoff, Guy G Poirier, Ted M Dawson, Valina L Dawson
Affiliations

Mediation of poly(ADP-ribose) polymerase-1-dependent cell death by apoptosis-inducing factor

Seong-Woon Yu et al. Science. .

Abstract

Poly(ADP-ribose) polymerase-1 (PARP-1) protects the genome by functioning in the DNA damage surveillance network. PARP-1 is also a mediator of cell death after ischemia-reperfusion injury, glutamate excitotoxicity, and various inflammatory processes. We show that PARP-1 activation is required for translocation of apoptosis-inducing factor (AIF) from the mitochondria to the nucleus and that AIF is necessary for PARP-1-dependent cell death. N-methyl-N'-nitro-N-nitrosoguanidine, H2O2, and N-methyl-d-aspartate induce AIF translocation and cell death, which is prevented by PARP inhibitors or genetic knockout of PARP-1, but is caspase independent. Microinjection of an antibody to AIF protects against PARP-1-dependent cytotoxicity. These data support a model in which PARP-1 activation signals AIF release from mitochondria, resulting in a caspase-independent pathway of programmed cell death.

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