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Abstract
NADPH-oxidase is an enzyme responsible for reactive oxygen species production, and inhibition of this enzyme represents an attractive therapeutic target for the treatment of many diseases. The aim of this study was to investigate the effects of Apocynin, NADPH-oxidase inhibitor, in the modulation of secondary injury in the spinal cord. The injury was induced by application of vascular clips to the dura via a four-level T5–T8 laminectomy in mice. Treatment with Apocynin 1 and 6 h after the trauma significantly decreased (1) the degree of spinal cord inflammation and tissue injury, (2) neutrophil infiltration, (3) adhesion molecule expression, (4) nuclear transcription factor–κB expression, (5) nitrotyrosine and poly-ADP-ribose formation, (6) pro-inflammatory cytokines production, (7) apoptosis and (8) mitogen-activated protein kinase activation. Moreover, Apocynin significantly ameliorated the loss of limb function (evaluated by motor recovery score). Thus, it is proposed that Apocynin may be useful in the treatment of inflammation associated with spinal cord trauma.
This paper was first published online on Early Online on 21 October 2010.