Oct 11, 1996

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

Neuroscience Letters
A CintraK Fuxe


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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Mentioned in this Paper

Lentiform Nucleus Structure
Catecholamines Measurement
3,4-Dihydroxyphenylacetic Acid, Monosodium Salt
Substantia Nigra Structure
Norepinephrine, (+, -)-Isomer
Dopamine Measurement
Entire Substantia Nigra

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