Stage 2 of the Wellcome Trust UK-Irish bipolar affective disorder sibling-pair genome screen: evidence for linkage on chromosomes 6q16-q21, 4q12-q21, 9p21, 10p14-p12 and 18q22

Lambert, D., Middle, F., Hamshere, Marian Lindsay ORCID: https://orcid.org/0000-0002-8990-0958, Segurado, Ricardo, Raybould, Rachel, Corvin, A., Green, Elaine Karen, O'Mahony, E., Nikolov, Ivan, Mulcahy, T., Haque, S., Bort, S., Bennett, P., Norton, Nadine ORCID: https://orcid.org/0000-0002-3848-4288, Owen, Michael John ORCID: https://orcid.org/0000-0003-4798-0862, Kirov, George ORCID: https://orcid.org/0000-0002-3427-3950, Lendon, C., Jones, Lisa Anne, Jones, Ian Richard ORCID: https://orcid.org/0000-0001-5821-5889, Holmans, Peter Alan ORCID: https://orcid.org/0000-0003-0870-9412, Gill, M. and Craddock, Nicholas John ORCID: https://orcid.org/0000-0003-2171-0610 2005. Stage 2 of the Wellcome Trust UK-Irish bipolar affective disorder sibling-pair genome screen: evidence for linkage on chromosomes 6q16-q21, 4q12-q21, 9p21, 10p14-p12 and 18q22. Molecular psychiatry 10 (9) , pp. 831-841. 10.1038/sj.mp.4001684

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Abstract

Bipolar affective disorder (BPAD) is a common psychiatric disorder with complex genetic aetiology. We have undertaken a genome-wide scan in one of the largest samples of bipolar affected sibling pairs (ASPs) using a two-stage approach combining sample splitting and marker grid tightening. In this second stage analysis, we have examined 17 regions that achieved a nominally significant maximum likelihood LOD score (MLS) threshold of 0.74 (or 1.18 for the X-chromosome) in stage one. The second stage has added 135 ASP families to bring the total stage 2 sample to 395 ASPs. In total, 494 microsatellite markers have been used to screen the human genome at a density of 10 cM in the first stage sample (260 ASPs) and 5 cM in the second stage. Under the broad diagnostic model, two markers gave LOD scores exceeding 3 with two-point analysis: D4S392 (LOD=3.30) and D10S197 (LOD=3.18). Multipoint analysis demonstrated suggestive evidence of linkage between BPAD and chromosomal regions 6q16–q21 (MLS=2.61) and 4q12–q21 (MLS=2.38). 6q16–q21 is of particular interest because our data, together with those from two recent genome scans, make this the best supported linkage region in BPAD. Further, our data show evidence of a gender effect at this locus with increased sharing predominantly within the male–male pairs. Our scan also provides support for linkage (MLS1.5) at several other regions that have been implicated in meta-analyses of bipolar disorder and/or schizophrenia including 9p21, 10p14–p12 and 18q22.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Medicine Systems Immunity Research Institute (SIURI) MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG) Neuroscience and Mental Health Research Institute (NMHRI)
Uncontrolled Keywords:	Genetics ; Genome scan ; Linkage ; LOD score ; Manic-depressive ; Microsatellite repeats
Publisher:	Nature Publishing Group
ISSN:	13594184
Last Modified:	17 Oct 2022 08:36
URI:	https://orca.cardiff.ac.uk/id/eprint/583

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