title: Genome-wide scan of bipolar disorder in 65 pedigrees: supportive evidence for linkage at 8q24, 18q22, 4q32, 2p12, and 13q12.
abstract: The purpose of this study was to assess 65 pedigrees ascertained through a Bipolar I (BPI) proband for evidence of linkage, using nonparametric methods in a genome-wide scan and for possible parent of origin effect using several analytical methods. We identified 15 loci with nominally significant evidence for increased allele sharing among affected relative pairs. Eight of these regions, at 8q24, 18q22, 4q32, 13q12, 4q35, 10q26, 2p12, and 12q24, directly overlap with previously reported evidence of linkage to bipolar disorder. Five regions at 20p13, 2p22, 14q23, 9p13, and 1q41 are within several Mb of previously reported regions. We report our findings in rank order and the top five markers had an NPL>2.5. The peak finding in these regions were D8S256 at 8q24, NPL 3.13; D18S878 at 18q22, NPL 2.90; D4S1629 at 4q32, NPL 2.80; D2S99 at 2p12, NPL 2.54; and D13S1493 at 13q12, NPL 2.53. No locus produced statistically significant evidence for linkage at the genome-wide level. The parent of origin effect was studied and consistent with our previous findings, evidence for a locus on 18q22 was predominantly from families wherein the father or paternal lineage was affected. There was evidence consistent with paternal imprinting at the loci on 13q12 and 1q41.
authors.affiliation: Department of Psychiatry and Human Behavior, Johns Hopkins University, School of Medicine, Baltimore, MD, USA. mmcinnis@jhu.edu
authors.forename: M G
authors.initials: MG
authors.lastname: McInnis
authors.forename: T-H
authors.initials: TH
authors.lastname: Lan
authors.forename: V L
authors.initials: VL
authors.lastname: Willour
authors.forename: F J
authors.initials: FJ
authors.lastname: McMahon
authors.forename: S G
authors.initials: SG
authors.lastname: Simpson
authors.forename: A M
authors.initials: AM
authors.lastname: Addington
authors.forename: D F
authors.initials: DF
authors.lastname: MacKinnon
authors.forename: J B
authors.initials: JB
authors.lastname: Potash
authors.forename: A T
authors.initials: AT
authors.lastname: Mahoney
authors.forename: J
authors.initials: J
authors.lastname: Chellis
authors.forename: Y
authors.initials: Y
authors.lastname: Huo
authors.forename: T
authors.initials: T
authors.lastname: Swift-Scanlan
authors.forename: H
authors.initials: H
authors.lastname: Chen
authors.forename: R
authors.initials: R
authors.lastname: Koskela
authors.forename: O Colin
authors.initials: OC
authors.lastname: Stine
authors.forename: K R
authors.initials: KR
authors.lastname: Jamison
authors.forename: P
authors.initials: P
authors.lastname: Holmans
authors.forename: S E
authors.initials: SE
authors.lastname: Folstein
authors.forename: K
authors.initials: K
authors.lastname: Ranade
authors.forename: C
authors.initials: C
authors.lastname: Friddle
authors.forename: D
authors.initials: D
authors.lastname: Botstein
authors.forename: T
authors.initials: T
authors.lastname: Marr
authors.forename: T H
authors.initials: TH
authors.lastname: Beaty
authors.forename: P
authors.initials: P
authors.lastname: Zandi
authors.forename: J Raymond
authors.initials: JR
authors.lastname: DePaulo
mesh_terms: D000293:Adolescent; D000328:Adult; D001714:Bipolar Disorder / Q000235:genetics*; D002877:Chromosomes, Human; D002882:Chromosomes, Human, Pair 13; D002887:Chromosomes, Human, Pair 18; D002889:Chromosomes, Human, Pair 2; D002894:Chromosomes, Human, Pair 4; D002898:Chromosomes, Human, Pair 8; D005192:Family Health; D008040:Genetic Linkage; D015894:Genome, Human; D018392:Genomic Imprinting; D005838:Genotype; D006801:Humans; D010290:Parents; D010375:Pedigree