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2009 ; 14
(3
): 1116-28
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Parthanatos, a messenger of death
#MMPMID19273119
David KK
; Andrabi SA
; Dawson TM
; Dawson VL
Front Biosci (Landmark Ed)
2009[Jan]; 14
(3
): 1116-28
PMID19273119
show ga
Poly-ADP-ribose polymerase-1 (PARP-1)'s roles in the cell span from maintaining
life to inducing death. The processes PARP-1 is involved in include DNA repair,
DNA transcription, mitosis, and cell death. Of PARP-1's different cellular
functions, its role in cell death is of particular interest to designing
therapies for diseases. Genetic deletion of PARP-1 revealed that PARP-1
overactivation underlies cell death in models of stroke, diabetes, inflammation
and neurodegeneration. Since interfering with PARP-1 mediated cell death will be
clinically beneficial, great effort has been invested into understanding
mechanisms downstream of PARP-1 overactivation. Recent evidence shows that
poly-ADP ribose (PAR) polymer itself can act as a cell death effector downstream
of PARP-1. We coined the term parthanatos after Thanatos, the personification of
death in Greek mythology, to refer to PAR-mediated cell death. In this review, we
will present evidence and questions raised by these recent findings, and
summarize the proposed mechanisms by which PARP-1 overactivation kills. It is
evident that further understanding of parthanatos opens up new avenues for
therapy in ameliorating diseases related to PARP-1 overactivation.