Neurosci Lett. 1999 Jan 4;259(1):21-4.

Nicotinamide reduces infarction up to two hours after the onset of permanent focal cerebral ischemia in Wistar rats.

Ayoub IA, Lee EJ, Ogilvy CS, Beal MF, Maynard KI.

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Neurosurgical Service, Massachusetts General Hospital and Harvard Medical School, Boston 02114, USA.

Abstract

Ischemia depletes ATP and initiates cascades leading to irreversible tissue injury. Nicotinamide is a precursor of nicotinamide adenine dinucleotide (NAD+) which increases neuronal ATP concentration and protects against malonate-induced neurotoxicity, trauma and nitric oxide toxicity. We therefore examined whether nicotinamide could protect against stroke, using a model of permanent middle cerebral artery occlusion (MCA) occlusion in Wistar rats. Nicotinamide reduced neuronal infarction in a dose-specific manner. Furthermore, nicotinamide (500 mg/kg) reduced infarcts when administered up to 2 h after the onset of permanent MCA occlusion. The mechanism of action underlying the neuroprotection observed with nicotinamide remains to be clarified. These results are potentially important since nicotinamide is already used clinically, though not in the treatment of stroke.

PMID:: 10027546; [PubMed - indexed for MEDLINE]

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