Altered Organization of GABA(A) Receptor mRNA Expression in the Depressed Suicide Brain.

Abstract:

:Inter-relationships ordinarily exist between mRNA expression of GABA(A) subunits in the frontopolar cortex (FPC) of individuals that had died suddenly from causes other than suicide. However, these correlations were largely absent in persons that had died by suicide. In the present investigation, these findings were extended by examining GABA(A) receptor expression patterns (of controls and depressed individuals that died by suicide) in the orbital frontal cortex (OFC), hippocampus, amygdala. locus coeruleus (LC) and paraventricular nucleus (PVN), all of which have been implicated in either depression, anxiety or stress responsivity. Using QPCR analysis, we found that in controls the inter-relations between GABA(A) subunits varied across brain regions, being high in the hippocampus and amygdala, intermediate in the LC, and low in the OFC and PVN. The GABA(A) subunit inter-relations were markedly different in persons that died by suicide, being reduced in hippocampus and amygdala, stable in the LC, but more coordinated in the OFC and to some extent in the PVN. It seems that altered brain region-specific inhibitory signaling, stemming from altered GABA(A) subunit coordination, are associated with depression/suicide. Although, it is unknown whether GABA(A) subunit re-organization was specifically tied to depression, suicide, or the accompanying distress, these data show that the coordinated expression of this transcriptome does vary depending on brain region and is plastic.

journal_name

Front Mol Neurosci

authors

Poulter MO,Du L,Zhurov V,Palkovits M,Faludi G,Merali Z,Anisman H

doi

10.3389/neuro.02.003.2010

subject

Has Abstract

pub_date

2010-03-29 00:00:00

pages

3

issn

1662-5099

journal_volume

3

pub_type

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