Distribution of GABA(B(1a)), GABA(B(1b)) and GABA(B2) receptor protein in cerebral cortex and thalamus of adult rats

The distribution of GABA(B) receptor subunits GABA(B(1a)), GABA(B(1b)) and GABA(B2), has been examined in the cerebral cortex and thalamus of adult rats using an immunocytochemical technique. GABA(B(1a)) and GABA(B(1b)) subunits co-localized with GABA(B2) in the cortex, where afferent thalamic GABAe...

Full description

Saved in:
Bibliographic Details
Published inNeuroreport Vol. 12; no. 3; p. 591
Main Authors Princivalle, A P, Pangalos, M N, Bowery, N G, Spreafico, R
Format Journal Article
LanguageEnglish
Published England 05.03.2001
Subjects
Online AccessGet more information

Cover

Loading…
More Information
Summary:The distribution of GABA(B) receptor subunits GABA(B(1a)), GABA(B(1b)) and GABA(B2), has been examined in the cerebral cortex and thalamus of adult rats using an immunocytochemical technique. GABA(B(1a)) and GABA(B(1b)) subunits co-localized with GABA(B2) in the cortex, where afferent thalamic GABAergic axons project to pyramidal neurones. The expression patterns of GABA(B(1a)), GABA(B(1b)) and GABA(B2) were similar throughout the thalamus. The data suggest that the GABA(B(1b)) subunit might be the presynaptic isoform in the thalamo-cortical pathway with the GABA(B(1a)) subunit possibly present at postsynaptic sites on cell bodies. This contrasts with our previous data, obtained in cerebellum and spinal cord which indicate opposite locations. Thus, it seems unlikely that functional role along with cellular location can be assigned in a general manner to specific GABA(B) receptor subunit splice variants.
ISSN:0959-4965
DOI:10.1097/00001756-200103050-00032