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Occlusion of arteries in the brain is a common cause of cerebral infarction which induces inflammatory response and oxidative stress resulting in neuronal apoptosis and disruption of neurological function. The present study investigated the protective roles of an nicotinamide adenine dinucleotide phosphate oxidase inhibitor, apocynin, against cerebral infarction. Rat went through a surgery of middle cerebral artery occlusion and a subset of rats was treated with apocynin by intraperitoneal injection. The volume of cerebral infarction and water content were measured. Neuronal apoptosis, inflammatory response, and oxidative stress were assessed following middle cerebral artery occlusion and apocynin treatment. We found that apocynin significantly improved neurological function, increased forelimb placement test scores, and suppressed balance beam walk latency in rats with cerebral infarction. Histological and biochemistry analysis revealed that apocynin lead to a significant reduction in the volume of cerebral infarction as well as cerebral water content, suppressed neuronal apoptosis, oxidative stress, and inflammatory response induced by middle cerebral artery occlusion. Finally, we found that apocynin suppressed Tlr4/nuclear factor-k-gene binding signaling pathway that was upregulated in rats with cerebral infarction. Our results indicate that apocynin may represent a potent therapeutic strategy in alleviating neurological dysfunctions in patients with cerebral infarction.

international journal of immunopathology and pharmacology

Apocynin promotes neural function recovery and suppresses neuronal apoptosis by inhibiting Tlr4/NF-κB signaling pathway in a rat model of cerebral infarction