Elsevier

Neuroscience Letters

Volume 217, Issue 1, 11 October 1996, Pages 61-65
Neuroscience Letters

Subacute toluene exposure increases DA dysfunction in the 6-OH dopamine lesioned nigrostriatal dopaminergic system of the rat

https://doi.org/10.1016/0304-3940(96)13049-4Get rights and content

Abstract

The potential neurotoxicity of the solvent toluene to the nigrostriatal dopaminergic system was assessed in a rat model of Parkinson's disease. Rats, 1 day after a unilateral injection of 6-hydroxydopamine (6-OH DA) into the substantia nigra, inhaled air or different concentrations of toluene (80, 300 or 1000 ppm), 6 h/day for 3 days. The animals were sacrificed 2 days after the last exposure and biochemical measurements of catecholamines and 3,4-dihydroxyphenylacetic acid (DOPAC) were performed in the neostriatum and substantia nigra. Toluene at 80 and 1000 ppm significantly enhanced the depletion of striatal DOPAC levels induced by the lesion and produced at 80 and 300 ppm a trend for intensifying the 6-OH DA-induced depletion of striatal DA stores. The alterations induced after the combined challenge to the dopaminergic nigrostriatal system may reflect endangering actions of toluene.

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This work has been supported by a grant from the Swedish Work Environmental Health Fund (93-0586).

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