Cocaine challenge enhances release of neuroprotective amino acid taurine in the striatum of chronic cocaine treated rats: a microdialysis study.
作者信息
Yablonsky-Alter Elena, Agovic Mervan S, Gashi Eleonora, Lidsky Theodore I, Friedman Eitan, Banerjee Shailesh P
机构信息
Department of Physiology and Pharmacology, The City University of New York, Medical School, New York, 10031, USA.
出版信息
Brain Res Bull. 2009 May 29;79(3-4):215-8. doi: 10.1016/j.brainresbull.2008.12.014. Epub 2009 Jan 21.
Abstract
Drug addiction is a serious public health problem. There is increasing evidence on the involvement of augmented glutamatergic transmission in cocaine-induced addiction and neurotoxicity. We investigated effects of acute or chronic cocaine administration and cocaine challenge following chronic cocaine exposure on the release of excitotoxic glutamate and neuroprotective taurine in the rat striatum by microdialysis. Cocaine challenge, following withdrawal after repeated cocaine exposure markedly increased the release of glutamate, which may cause neurotoxicity. Simultaneously, cocaine challenge after withdrawal also significantly increased the release of taurine, which counteracts glutamate-mediated excitotoxicity and possibly cell death. Thus, the mammalian brain has an endogenous self-protective mechanism against cocaine-mediated neurotoxicity and potentially addiction.
摘要
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