Antioxidant therapies for traumatic brain injury.

Neurotherapeutics : the Journal of the American Society for Experimental NeuroTherapeutics
E D HallAyman G Mustafa

Abstract

Free radical-induced oxidative damage reactions, and membrane lipid peroxidation (LP), in particular, are among the best validated secondary injury mechanisms in preclinical traumatic brain injury (TBI) models. In addition to the disruption of the membrane phospholipid architecture, LP results in the formation of cytotoxic aldehyde-containing products that bind to cellular proteins and impair their normal functions. This article reviews the progress of the past three decades in regard to the preclinical discovery and attempted clinical development of antioxidant drugs designed to inhibit free radical-induced LP and its neurotoxic consequences via different mechanisms including the O(2)(*-) scavenger superoxide dismutase and the lipid peroxidation inhibitor tirilazad. In addition, various other antioxidant agents that have been shown to have efficacy in preclinical TBI models are briefly presented, such as the LP inhibitors U83836E, resveratrol, curcumin, OPC-14177, and lipoic acid; the iron chelator deferoxamine and the nitroxide-containing antioxidants, such as alpha-phenyl-tert-butyl nitrone and tempol. A relatively new antioxidant mechanistic strategy for acute TBI is aimed at the scavenging of aldehydic LP byproducts that a...Continue Reading

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