PMID: 11926075Apr 3, 2002Paper

The neurobiology of bipolar disorder: focus on signal transduction pathways and the regulation of gene expression

Canadian Journal of Psychiatry. Revue Canadienne De Psychiatrie
Yarema Bezchlibnyk, L Trevor Young

Abstract

This article presents an overview of signal transduction pathways and reviews the research undertaken to study these systems in clinically relevant samples from patients with bipolar disorder (BD). We reviewed the published findings from studies of postmortem brain tissue and blood samples from patients with BD. Although the exact biochemical abnormalities have yet to be identified, the presented findings strongly suggest that BD may be due, at least in part, to abnormalities in signal transduction mechanisms. In particular, altered levels or function, or both, of G-protein alpha subunits and effector molecules such as protein kinase A (PKA) and protein kinase C (PKC) have consistently been associated with BD both in peripheral cells and in postmortem brain tissue, while more recent studies implicate disruption in novel second-messenger cascades, such as the ERK/MAPK pathway. Despite the difficulties inherent in biochemical studies of clinically relevant tissue samples, numerous investigations have illuminated the signal transduction mechanisms in patients with BD. These studies also suggest that BD may be due to the interaction of many abnormalities. In this context, novel techniques enabling the study of gene expression promi...Continue Reading

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