Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke

  • Authors:
    • Galaleldin E. Abdelkarim
    • Karen Gertz
    • Christoph Harms
    • Juri Katchanov
    • Ulrich Dirnagl
    • Csaba Szabo
    • Matthias Endres
  • View Affiliations

  • Published online on: March 1, 2001     https://doi.org/10.3892/ijmm.7.3.255
  • Pages: 255-260
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Focal cerebral ischemia activates the nuclear protein poly(ADP-ribose) polymerase (PARP) by single DNA strand breaks which leads to energy depletion and cell necrosis. Deletion or inhibition of PARP protects against ischemic brain injury. Here we examined the neuroprotective effect of PJ34, a novel potent inhibitor of PARP in vitro and in vivo. Serum-free primary neuronal cultures derived from rat cortex (E15-17) and kept in culture for 10 days were exposed to oxygen glucose deprivation (OGD) in vitro. Neuronal injury was quantified by LDH release after 24 h. Pretreatment with 30-1000 nM PJ34 significantly protected from OGD-induced cell injury in a dose-dependent manner. For in vivo experiments SV/129 mice were treated with PJ34 (50 μg) by intraperitoneal injection 2 h before 1 h middle cerebral artery occlusion (MCAo) and again 6 h later. Twenty-three h after reperfusion ischemic injury was significantly decreased compared to vehicle-treated controls (infarct volume reduction of 40%, p<0.05). Similarly, in a rat model of MCAo (2 h occlusion followed by up to 22 h reperfusion), PJ34 administration (10 mg/kg i.v.) significantly reduced infarct size, and the effect of the drug was maintained even if it was given as late as 10 min prior to reperfusion time. PJ34 significantly protected in a 4 h, but not in a 24 h permanent occlusion model. In conclusion, PJ34, a novel, potent inhibitor of PARP exerts massive neuroprotective agents, with a significant therapeutic window of opportunity. The present work strengthens the concept that pharmacological PARP inhibition may be a suitable approach for the treatment of acute stroke in man.

Related Articles

Journal Cover

March 2001
Volume 7 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Abdelkarim GE, Gertz K, Harms C, Katchanov J, Dirnagl U, Szabo C and Endres M: Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke. Int J Mol Med 7: 255-260, 2001.
APA
Abdelkarim, G.E., Gertz, K., Harms, C., Katchanov, J., Dirnagl, U., Szabo, C., & Endres, M. (2001). Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke. International Journal of Molecular Medicine, 7, 255-260. https://doi.org/10.3892/ijmm.7.3.255
MLA
Abdelkarim, G. E., Gertz, K., Harms, C., Katchanov, J., Dirnagl, U., Szabo, C., Endres, M."Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke". International Journal of Molecular Medicine 7.3 (2001): 255-260.
Chicago
Abdelkarim, G. E., Gertz, K., Harms, C., Katchanov, J., Dirnagl, U., Szabo, C., Endres, M."Protective effects of PJ34, a novel, potent inhibitor of poly(ADP-ribose) polymerase (PARP) in in vitro and in vivo models of stroke". International Journal of Molecular Medicine 7, no. 3 (2001): 255-260. https://doi.org/10.3892/ijmm.7.3.255