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Evidence for the involvement of the glucocorticoid receptor gene in bipolar disorder in an isolated northern Swedish population
Umeå universitet, Medicinska fakulteten, Institutionen för klinisk vetenskap, Psykiatri.
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2011 (Engelska)Ingår i: Bipolar Disorders, ISSN 1398-5647, E-ISSN 1399-5618, Vol. 13, nr 7-8, s. 614-623Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Objectives: Dysfunction of the hypothalamus-pituitary-adrenal (HPA) axis is one of the most consistent findings in the pathophysiology of mood disorders. The potential role of genes related to HPA axis function has been investigated extensively in major depression. However, in bipolar disorder (BPD) such studies are scarce. We performed a systematic HapMap-based association study of six genes crucial for HPA axis function in relation to BPD.

Methods: Haplotype tagging single nucleotide polymorphisms (htSNPs) were selected in order to identify all haplotypes with a frequency of more than 1% in the genes encoding the glucocorticoid receptor (GR), mineralocorticoid receptor (MR), corticotrophin releasing hormone receptor 1 (CRH-R1) and 2 (CRH-R2), CRH binding protein (CRH-BP), and FK binding protein 5 (FKBP5). This resulted in a total selection of 225 SNPs that were genotyped and analyzed in 309 BPD patients and 364 matched control individuals all originating from an isolated northern Swedish population.

Results: Consistent evidence for an association with BPD was found for NR3C1, the gene encoding GR. Almost all SNPs in two adjacent haplotype blocks contributed to the positive signal, comprised of significant single marker, sliding window, and haplotype-specific p-values. All these results point to a moderately frequent (10-15%) susceptibility haplotype covering the entire coding region and 3 > untranslated region (UTR) of NR3C1.

Conclusions: This study contributes to the growing evidence for a role of the glucocorticoid receptor gene (NR3C1) in vulnerability to mood disorders, and BPD in particular, and warrants further in vitro investigation of the at-risk haplotypes with respect to disease etiology. However, this association might be restricted to this specific population, as it is observed in a rather small sample from an isolated population without replication, and data from large meta-analyses for genome-wide association studies in BPD do not show the GR as a very strong candidate.

Ort, förlag, år, upplaga, sidor
Malden, USA: Wiley-Blackwell, 2011. Vol. 13, nr 7-8, s. 614-623
Nyckelord [en]
bipolar disorder, glucocorticoid receptor, HPA axis, isolated population, NR3C1
Nationell ämneskategori
Neurologi Neurovetenskaper
Identifikatorer
URN: urn:nbn:se:umu:diva-50696DOI: 10.1111/j.1399-5618.2011.00960.xISI: 000297053300004PubMedID: 22085474OAI: oai:DiVA.org:umu-50696DiVA, id: diva2:468124
Forskningsfinansiär
Vetenskapsrådet, 2006-4472Vetenskapsrådet, 2009-5269Västerbottens läns landstingRegion NorrbottenTillgänglig från: 2011-12-20 Skapad: 2011-12-19 Senast uppdaterad: 2019-01-30Bibliografiskt granskad

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Norrback, Karl-FredrikNordin, AnnelieAdolfsson, Rolf

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Norrback, Karl-FredrikNordin, AnnelieAdolfsson, Rolf
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Psykiatri
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Bipolar Disorders
NeurologiNeurovetenskaper

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