title: Rare missense neuronal cadherin gene (CDH2) variants in specific obsessive-compulsive disorder and Tourette disorder phenotypes.
abstract: The recent finding that the neuronal cadherin gene CDH2 confers a highly significant risk for canine compulsive disorder led us to investigate whether missense variants within the human ortholog CDH2 are associated with altered susceptibility to obsessive-compulsive disorder (OCD), Tourette disorder (TD) and related disorders. Exon resequencing of CDH2 in 320 individuals identified four non-synonymous single-nucleotide variants, which were subsequently genotyped in OCD probands, Tourette disorder probands and relatives, and healthy controls (total N=1161). None of the four variants was significantly associated with either OCD or TD. One variant, N706S, was found only in the OCD/TD groups, but not in controls. By examining clinical data, we found there were significant TD-related phenotype differences between those OCD probands with and without the N845S variant with regard to the co-occurrence of TD (Fisher's exact test P=0.014, OR=6.03). Both N706S and N845S variants conferred reduced CDH2 protein expression in transfected cells. Although our data provide no overall support for association of CDH2 rare variants in these disorders considered as single entities, the clinical features and severity of probands carrying the uncommon non-synonymous variants suggest that CDH2, along with other cadherin and cell adhesion genes, is an interesting gene to pursue as a plausible contributor to OCD, TD and related disorders with repetitive behaviors, including autism spectrum disorders.
authors: Laboratory of Clinical Science, NIMH-Intramural Research Program, Bethesda, MD 20819, USA. moyap@mail.nih.gov
authors: Pablo R
authors: PR
authors: Moya
authors: Nicholas H
authors: NH
authors: Dodman
authors: Kiara R
authors: KR
authors: Timpano
authors: Liza M
authors: LM
authors: Rubenstein
authors: Zaker
authors: Z
authors: Rana
authors: Ruby L
authors: RL
authors: Fried
authors: Louis F
authors: LF
authors: Reichardt
authors: Gary A
authors: GA
authors: Heiman
authors: Jay A
authors: JA
authors: Tischfield
authors: Robert A
authors: RA
authors: King
authors: Marzena
authors: M
authors: Galdzicka
authors: Edward I
authors: EI
authors: Ginns
authors: Jens R
authors: JR
authors: Wendland
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000235:genetics* / Q000378:metabolism; D015153:Blotting, Western; D015820:Cadherins / Q000235:genetics* / Q000378:metabolism; D004252:DNA Mutational Analysis; D005838:Genotype; D057809:HEK293 Cells; D006801:Humans; D020125:Mutation, Missense; D009771:Obsessive-Compulsive Disorder / Q000235:genetics* / Q000523:psychology; D010641:Phenotype; D011569:Psychiatric Status Rating Scales; D005879:Tourette Syndrome / Q000235:genetics* / Q000523:psychology; D014162:Transfection
chemical_list: D015703:Antigens, CD; C050361:CDH2 protein, human; D015820:Cadherins