An apparently dominant bipolar affective disorder (BPAD) locus on chromosome 20p11.2–q11.2 in a large Turkish pedigree
- 12 January 2001
- journal article
- research article
- Published by Springer Nature in European Journal of Human Genetics
- Vol. 9 (1) , 39-44
- https://doi.org/10.1038/sj.ejhg.5200584
Abstract
Bipolar affective disorder (BPAD), also known as manic-depressive illness, is a common complex, polygenic disorder characterised by recurrent cyclic episodes of mania and depression. Family, twin, and adoption studies strongly suggest a genetic predisposition/susceptibility to BPAD, but no genes have yet been identified. We studied a large Turkish pedigree, with an apparently autosomal dominant BPAD, which contained 13 affected individuals. The age of onset ranged from 15–40 with a mean of 25 years. The phenotypes consisted of recurrent manic and major depressive episodes, including suicidal attempts; there was usually full remission with lithium treatment. A genome-wide linkage analysis using a dominant mode of inheritance showed strong evidence for a BPAD susceptibility locus on chromosome 20p11.2–q11.2. The highest 2-point lod score of 4.34 at θ = 0 was obtained with markers D20S604, D20S470, D20S836 and D20S838 using a dominant model with full penetrance. Haplotype analysis enabled the mapping of the BPAD locus in this family between markers D20S186 and D20S109, to a region of approximately 42 cM.Keywords
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