title: Analysis of epistasis in linked regions in the Irish study of high-density schizophrenia families.
abstract: Epistasis may be important in the etiology of schizophrenia. Analysis of epistasis has been important in the positional cloning of a gene involved in the etiology of type II diabetes mellitus. We investigated the importance of epistasis among six linked regions in 268 multiplex pedigrees in the Irish Study of High-Density Schizophrenia Families (ISHDSF) by computing pairwise correlations between nonparametric linkage scores for narrow, intermediate, and broad diagnostic definitions. The linked regions were on chromosomes 2, 4, 5, 6, 8, and 10. No correlation reached our a priori level of statistical significance. Using this statistical approach, we did not find evidence of important epistatic effects among these six regions in the ISHDSF.
authors.affiliation: Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, Richmond, Virginia 23298, USA. sullivan@psycho.psi.vcu.edu
authors.forename: P F
authors.initials: PF
authors.lastname: Sullivan
authors.forename: F A
authors.initials: FA
authors.lastname: O'Neill
authors.forename: D
authors.initials: D
authors.lastname: Walsh
authors.forename: Y
authors.initials: Y
authors.lastname: Ma
authors.forename: K S
authors.initials: KS
authors.lastname: Kendler
authors.forename: R E
authors.initials: RE
authors.lastname: Straub
mesh_terms: D002877:Chromosomes, Human; D004843:Epistasis, Genetic; D005192:Family Health; D008040:Genetic Linkage; D005820:Genetic Testing; D006801:Humans; D007494:Ireland; D008957:Models, Genetic; D010375:Pedigree; D012559:Schizophrenia / Q000453:epidemiology / Q000209:etiology / Q000235:genetics*