PMID: 2493072Mar 1, 1989Paper

Reduction of brain glutathione by L-buthionine sulfoximine potentiates the dopamine-depleting action of 6-hydroxydopamine in rat striatum

Journal of Neurochemistry
E PilebladB Fornstedt

Abstract

Sprague-Dawley rats were anesthetized with chloral hydrate, and plastic cannulae were permanently implanted into the lateral ventricles. The animals then were allowed to recover for 1-2 days. L-Buthionine sulfoximine (L-BSO), a selective inhibitor of glutathione (GSH) synthesis, and 6-hydroxydopamine (6-OH-DA), a selective catecholaminergic neurotoxin, were administered intracerebroventricularly. The striatal concentrations of GSH and monoamines were determined by HPLC with electrochemical detection. Two injections of L-BSO (3.2 mg, at a 48-h interval) resulted in a 70% reduction of striatal GSH. 6-OH-DA (150 or 300 micrograms) reduced the concentrations of striatal dopamine and noradrenaline 7 days after the administration, but left the concentrations of 5-hydroxytryptamine unaltered. L-BSO treatment did not produce any changes in the levels of monoamines per se but it potentiated the catecholamine-depleting effect of 6-OH-DA in the striatum. Thus, GSH appears to suppress the toxicity of 6-OH-DA, probably by scavenging the toxic species formed during 6-OH-DA oxidation. In view of these results one may suggest an important role for GSH in catecholaminergic neurons: protecting against the oxidation of endogenous catechols.

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Citations

Jan 1, 1991·Journal of Neural Transmission. General Section·E PilebladE Hansson
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