title: Association between polymorphisms in serotonin transporter gene and attention deficit hyperactivity disorder in Chinese Han subjects.
abstract: Prior work has shown reduced serotonin transmission to be associated with impulsivity and behavioral problems. The current study assessed the association between ADHD and two variants of the serotonin transporter gene: the 44-bp deletion/insertion polymorphism (5-HTTLPR) and the 17 bp-repeat polymorphism in intron 2 (STin2.VNTR). We hypothesized that ADHD phenotypes associated with impulsivity would show an association with these variants. Two-hundred and ninety-three ADHD trios were genotyped and analyzed using transmission disequilibrium test (TDT) analysis and haplotype analysis. We found no association between the STin2.VNTR and ADHD, but did find preferential transmission of the S allele of the 5-HTTLPR polymorphism (chi(2) = 5.751, P = 0.016) to probands with ADHD. Haplotype analysis found the L/10 haplotype was over-transmitted (chi(2) = 6.172, P = 0.013), while L/12 was under-transmitted to probands with ADHD (chi(2) = 4.866, P = 0.027).
authors.affiliation: Institute of Mental Health, Peking University, Peking University Sixth Hospital, Beijing, PR China.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Yufeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Rulun
authors.initials: R
authors.lastname: Zhou
authors.forename: Haobo
authors.initials: H
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Yang
authors.forename: Bing
authors.initials: B
authors.lastname: Wang
authors.forename: Stephen V
authors.initials: SV
authors.lastname: Faraone
mesh_terms: D000483:Alleles; D044466:Asian People / Q000235:genetics*; D001289:Attention Deficit Disorder with Hyperactivity / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D001483:Base Sequence; D002648:Child; D002681:China; D004247:DNA / Q000235:genetics; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006239:Haplotypes; D006801:Humans; D007438:Introns; D008297:Male; D018598:Minisatellite Repeats; D010641:Phenotype; D011110:Polymorphism, Genetic; D011985:Receptors, Serotonin / Q000235:genetics*
chemical_list: D011985:Receptors, Serotonin; D004247:DNA