Brain Res. 1990 Apr 16;513(2):274-9.

Dopamine uptake inhibitors block long-term neurotoxic effects of methamphetamine upon dopaminergic neurons.

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Department of Pharmacological and Physiological Sciences, University of Chicago, IL 60637.

Abstract

A single large dose (100 mg/kg, s.c.) of methamphetamine (MA) is known to exert neurotoxic effects on dopaminergic neurons. The potency at which a series of dopamine (DA) uptake inhibitors blocked MA-induced neostriatal depletions (amfonelic acid (AFA) much greater than mazindol (MAZ) greater than or equal to bupropion (BUP) greater than benztropine (BENZ)) was similar to their potency at blocking 6-hydroxydopamine (6-OHDA) neurotoxicity in rats. Amfonelic acid was able to block long-term neostriatal DA depletions when given 8 h, but not 16 h, after a single large MA dose. These results suggest that an intact and functional DA uptake site is necessary for the development of MA-induced long-term DA depletions.

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