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Effects of repeated inhalation of toluene on ionotropic GABA A and glutamate receptor subunit levels in rat brain.

Abstract：

:Toluene is a commonly abused solvent found in many industrial and commercial products. The neurobiological effects of toluene remain unclear, but many of them, like those of ethanol, may be mediated by gamma-aminobutyric acid (GABA) and glutamate receptors. Chronic ethanol administration has been shown to alter levels of specific subunits for GABA type A (GABA(A)), N-methyl-d-aspartate (NMDA) and alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptors. However, little is known about the effects of toluene on subunit levels of these receptors. To examine this, rats were exposed to toluene vapors (8000 ppm) or air for 10 days (30 min/day), and afterwards GABA(A) alpha1, NR1 and NR2B (NMDA) and GluR1 and GluR2/3 (AMPA) receptor subunit levels were determined in discrete brain regions of these animals by Western blotting. Toluene increased GABA(A) alpha1, NR1, NR2B and GluR2/3 subunits in the medial prefrontal cortex and decreased GABA(A) alpha1 and NR1 subunits in the substantia nigra compacta. Toluene inhalation produced modest increases in GABA(A) alpha1 subunits in the striatum, as well as slight decreases in this subunit in the ventral tegmental area. NR2B subunit levels were also slightly increased within the nucleus accumbens by toluene. These studies show that toluene differentially alters the levels of specific GABAergic and glutamatergic receptor subunits in a regionally selective manner.

journal_name

Neurochem Int

journal_title

Neurochemistry international

authors

Williams JM,Stafford D,Steketee JD

doi

10.1016/j.neuint.2004.07.006

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

1-10

issue

1

eissn

0197-0186

issn

1872-9754

pii

S0197-0186(04)00156-1

journal_volume

46

pub_type

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