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Immunohistochemical and immunoblot analysis of gamma-aminobutyric acid B receptor in the prefrontal cortex of subjects with schizophrenia and bipolar disorder.

Abstract：

:Immunohistochemical and immunoblot techniques were employed to examine the distribution and expression of GABA(B) receptors in the prefrontal cortex of postmortem subjects with schizophrenia and bipolar disorder. GABA(B)R1a/b immunoreactivity was observed in the neuronal soma and dendrites as well as in the neuropil in the control subjects. GABA(B)R1a/b immunolabeling in neurons from the subjects with schizophrenia and bipolar disorder was less intense than in those from the control subjects. In control subjects, the distribution of GABA(B)R2 immunoreactivity was found to be similar to that of GABA(B)R1a/b. GABA(B)R2 immunolabeling in neurons from the bipolar disorder group appeared less intense than that of the normal controls as well as that in schizophrenic groups. Immunoblot analysis demonstrated a significant decrease in GABA(B)R1a levels in schizophrenic subjects, while there was a significant decrease in GABA(B)R1a, GABA(B)R1b, and GABA(B)R2 levels in bipolar subjects compared with the controls. The present study suggests that the GABA(B) receptor is involved in the pathophysiology of schizophrenia and bipolar disorder, and further suggests that the patterns of changes in GABA(B) receptor subtypes are different between these two disorders.

journal_name

Neurosci Lett

journal_title

Neuroscience letters

authors

Ishikawa M,Mizukami K,Iwakiri M,Asada T

doi

10.1016/j.neulet.2005.04.025

keywords:

subject

Has Abstract

pub_date

2005-08-05 00:00:00

pages

272-7

issue

3

eissn

0304-3940

issn

1872-7972

pii

S0304-3940(05)00417-9

journal_volume

383

pub_type

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