PMID: 11932935Apr 5, 2002Paper

GABA(A) receptor changes in delta subunit-deficient mice: altered expression of alpha4 and gamma2 subunits in the forebrain

The Journal of Comparative Neurology
Z PengC R Houser

Abstract

The delta subunit is a novel subunit of the pentameric gamma-aminobutyric acid (GABA)(A) receptor that conveys special pharmacological and functional properties to recombinant receptors and may be particularly important in mediating tonic inhibition. Mice that lack the delta subunit have been produced by gene-targeting technology, and these mice were studied with immunohistochemical and immunoblot methods to determine whether changes in GABA(A) receptors were limited to deletion of the delta subunit or whether alterations in other GABA(A) receptor subunits were also present in the delta subunit knockout (delta-/-) mice. Immunohistochemical studies of wild-type mice confirmed the restricted distribution of the delta subunit in the forebrain. Regions with moderate to high levels of delta subunit expression included thalamic relay nuclei, caudate-putamen, molecular layer of the dentate gyrus, and outer layers of the cerebral cortex. Virtually no delta subunit labeling was evident in adjacent regions, such as the thalamic reticular nucleus, hypothalamus, and globus pallidus. Comparisons of the expression of other subunits in delta-/- and wild-type mice demonstrated substantial changes in the alpha4 and gamma2 subunits of the GABA(A...Continue Reading

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Citations

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