title: An approach to investigating linkage for bipolar disorder using large Costa Rican pedigrees.
abstract: Despite the evidence that major gene effects exist for bipolar disorder (BP), efforts to map BP loci have so far been unsuccessful. A strategy for mapping BP loci is described, focused on investigation of large pedigrees from a genetically homogenous population, that of Costa Rica. This approach is based on the use of a conservative definition of the BP phenotype in preparation for whole genome screening with polymorphic markers. Linkage simulation analyses are utilized to indicate the probability of detecting evidence suggestive of linkage, using these pedigrees. These analyses are performed under a series of single locus models, ranging from recessive to nearly dominant, utilizing both lod score and affected pedigree member analyses. Additional calculations demonstrate that with any of the models employed, most of the information for linkage derives from affected rather than unaffected individuals.
authors.affiliation: Center for Neurobiology and Psychiatry, University of California, San Francisco 94143, USA.
authors.forename: N B
authors.initials: NB
authors.lastname: Freimer
authors.forename: V I
authors.initials: VI
authors.lastname: Reus
authors.forename: M
authors.initials: M
authors.lastname: Escamilla
authors.forename: M
authors.initials: M
authors.lastname: Spesny
authors.forename: L
authors.initials: L
authors.lastname: Smith
authors.forename: S
authors.initials: S
authors.lastname: Service
authors.forename: A
authors.initials: A
authors.lastname: Gallegos
authors.forename: L
authors.initials: L
authors.lastname: Meza
authors.forename: S
authors.initials: S
authors.lastname: Batki
authors.forename: S
authors.initials: S
authors.lastname: Vinogradov
authors.forename: P
authors.initials: P
authors.lastname: Leon
authors.forename: L A
authors.initials: LA
authors.lastname: Sandkuijl
mesh_terms: D001714:Bipolar Disorder / Q000453:epidemiology / Q000235:genetics*; D002648:Child; D003364:Costa Rica / Q000453:epidemiology; D005260:Female; D008040:Genetic Linkage; D006801:Humans; D008297:Male; D008957:Models, Genetic; D010375:Pedigree