Regional alterations of brain catecholamines by styrene exposure in rabbits.

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 alpha-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.

journal_name

Arch Toxicol

journal_title

Archives of toxicology

authors

Mutti A,Falzoi M,Romanelli A,Franchini I

doi

10.1007/BF00316123

subject

Has Abstract

pub_date

1984-09-01 00:00:00

pages

173-7

issue

3

eissn

0340-5761

issn

1432-0738

journal_volume

55

pub_type

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