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Proc Natl Acad Sci U S A. 2001 Sep 25;98(20):11485-90.

Fine-scale mapping of a locus for severe bipolar mood disorder on chromosome 18p11.3 in the Costa Rican population.

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  • 1Neurogenetics Laboratory, Center for Neurobiology and Psychiatry, and Department of Psychiatry, University of California, San Francisco, CA 94143, USA.

Abstract

We have searched for genes predisposing to bipolar disorder (BP) by studying individuals with the most extreme form of the affected phenotype, BP-I, ascertained from the genetically isolated population of the Central Valley of Costa Rica (CVCR). The results of a previous linkage analysis on two extended CVCR BP-I pedigrees, CR001 and CR004, and of linkage disequilibrium (LD) analyses of a CVCR population sample of BP-I patients implicated a candidate region on 18p11.3. We further investigated this region by creating a physical map and developing 4 new microsatellite and 26 single-nucleotide polymorphism markers for typing in the pedigree and population samples. We report the results of fine-scale association analyses in the population sample, as well as evaluation of haplotypes in pedigree CR001. Our results suggest a candidate region containing six genes but also highlight the complexities of LD mapping of common disorders.

PMID:
11572994
[PubMed - indexed for MEDLINE]
PMCID:
PMC58756
Free PMC Article

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