title: Genetic variation at the TPH2 gene influences impulsivity in addition to eating disorders.
abstract: Genes are involved in eating disorders (EDs) and self-induced vomiting (SV), a key symptom of different types of EDs. Perfectionism and impulsivity are potential risk factors for EDs. TPH2 (tryptophan hydroxylase 2) SNP rs1473473 was previously associated with anorexia nervosa and EDs characterized by SV. Could perfectionism or impulsivity be underlying the association between rs1473473 and EDs? Genetic association between TPH2 SNP rs1473473 and perfectionism or impulsivity was first evaluated in a random control group (N = 512). The associations obtained in this control group were subsequently tested in a group of patients with an ED (N = 267). The minor allele of rs1473473 (OR = 1.49) was more frequent in impulsive controls, but also in impulsive patients with an ED (OR = 1.83). The largest effect was found in the patients with an ED characterized by SV (OR = 2.51, p = 0.02). Genetic variation at the TPH2 gene appeared to affect impulsivity which, in turn, might predispose to the SV phenotype.
authors.affiliation: Center for Eating Disorders Ursula, P. O. Box 422, 2260 AK Leidschendam, The Netherlands. r.optlandt@centrumeetstoornissen.nl
authors.forename: Margarita C T
authors.initials: MC
authors.lastname: Slof-Op't Landt
authors.forename: Meike
authors.initials: M
authors.lastname: Bartels
authors.forename: Christel M
authors.initials: CM
authors.lastname: Middeldorp
authors.forename: Catherina E M
authors.initials: CE
authors.lastname: van Beijsterveldt
authors.forename: P Eline
authors.initials: PE
authors.lastname: Slagboom
authors.forename: Dorret I
authors.initials: DI
authors.lastname: Boomsma
authors.forename: Eric F
authors.initials: EF
authors.lastname: van Furth
authors.forename: Ingrid
authors.initials: I
authors.lastname: Meulenbelt
mesh_terms: D000293:Adolescent; D000328:Adult; D000856:Anorexia Nervosa / Q000235:genetics; D052018:Bulimia Nervosa / Q000235:genetics; D016022:Case-Control Studies; D001068:Feeding and Eating Disorders / Q000235:genetics*; D005260:Female; D005819:Genetic Markers / Q000235:genetics; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D007175:Impulsive Behavior / Q000235:genetics*; D008875:Middle Aged; D010641:Phenotype; D014365:Tryptophan Hydroxylase / Q000235:genetics*; D055815:Young Adult
chemical_list: D005819:Genetic Markers; C494784:TPH2 protein, human; D014365:Tryptophan Hydroxylase