Journal
BRAIN RESEARCH
Volume 1041, Issue 2, Pages 149-156Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.brainres.2005.01.096
Keywords
inhibitors; neurological deficit; neuroprotection; poly(ADP-ribose) polymerase; rat; traumatic brain injury
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Funding
- NINDS NIH HHS [R44NS037985] Funding Source: Medline
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Traumatic brain injury produces peroxynitrite, a powerful oxidant which triggers DNA strand breaks, leading to the activation of poly(ADP-ribose)polymerase-1 (PARP-1). We previously demonstrated that 3-aminobenzamide, a PARP inhibitor, is neuroprotective in a model of traumatic brain injury induced by fluid percussion in rat, suggesting that PARP-1 could be a therapeutic target. In order to confirm this hypothesis, we investigated the effects of PJ34 and INO-1001, two PARP inhibitors from structural classes other than benzamide, on the post-traumatic consequences. Pre- and post-treatments with PJ34 (30 mg/kg/day) and INO-1001 (10 mg/kg/day) decrease the neurological deficit at 3 days post-injury and this deficit is still reduced at 7 days. These neurological recovery-promoting effects are associated with the inhibition of PARP-1 activation caused by trauma, as demonstrated by abolishment of immunostaining of poly(ADP-ribose). Thus, the present work strengthens strongly the concept that PARP-1 inhibition may be a suitable approach for the treatment of brain trauma. (c) 2005 Elsevier B.V. All rights reserved.
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