ISSN:
1432-0738
Keywords:
Styrene
;
Dopamine
;
Norepinephrine
;
Homovanillic acid
;
Turnover
;
Striatum
;
Tuberoinfundibular system
;
Adult rabbits
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The regional distribution of dopamine, norepinephrine and homovanillic acid was assessed in adult male rabbits exposed to styrene vapours. The turnover of dopamine and norepinephrine was also measured in several brain regions by the decay in endogenous catecholamines after inhibition of tyrosine hydroxylase by α-methyl-p-tyrosine. Styrene exposure produced a marked and dose-dependent decrease in striatal and tuberoinfundibular dopamine, associated with a consistent increase in homovanillic acid content in the same regions. Norepinephrine levels were unaffected by styrene exposure. The observed increase in catabolism of dopamine cannot be explained by the turnover time, which was not significantly different in the exposed as compared to the control rabbits. Competition of a styrene metabolite with dopamine for the vesicular storage capacity or a selective destruction of dopaminergic terminals are suggested as the possible mechanisms for styrene neurotoxicity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00316123
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