Family-based association study of serotonin transporter gene polymorphisms in attention deficit hyperactivity disorder: No evidence for association in UK and Taiwanese samples

TY - JOUR

T1 - Family-based association study of serotonin transporter gene polymorphisms in attention deficit hyperactivity disorder: No evidence for association in UK and Taiwanese samples

AU - Xu, X H

AU - Mill, J

AU - Chen, C K

AU - Brookes, K

AU - Taylor, E

AU - Asherson, P

PY - 2005/11/5

Y1 - 2005/11/5

N2 - Five independent studies have reported associations between serotonin transporter gene (5-HTT) polymorphisms and attention deficit hyperactivity disorder (ADHD). Four studies found evidence for association between the long-allele of a 44-base pair insertion/deletion polymorphism (5-HTTLPR), one of the studies found association to a variable number tandem repeat within intron 2, another to the T-allele of a single base pair substitution in the 3'-untranslated regions and another reported preferential transmission of a haplotype of the three markers (long-allele/10-repeat-allele/T-altele). One further study found no evidence for these associations. We investigated the association of these three markers in two samples of ADHD patients from the United Kingdom (n = 197) and Taiwan (n = 212), using within-family tests of association. No association was found between any of the three markers in either of the two populations. Although we found some evidence for the preferential transmission of a rare haplotype (iong-allele/9-repeat-allele/T-allele; X-2 = 4.5, P=0.034), we concluded that this most likely occurred by chance factors alone. (c) 2005 Wiley-Liss, Inc

AB - Five independent studies have reported associations between serotonin transporter gene (5-HTT) polymorphisms and attention deficit hyperactivity disorder (ADHD). Four studies found evidence for association between the long-allele of a 44-base pair insertion/deletion polymorphism (5-HTTLPR), one of the studies found association to a variable number tandem repeat within intron 2, another to the T-allele of a single base pair substitution in the 3'-untranslated regions and another reported preferential transmission of a haplotype of the three markers (long-allele/10-repeat-allele/T-altele). One further study found no evidence for these associations. We investigated the association of these three markers in two samples of ADHD patients from the United Kingdom (n = 197) and Taiwan (n = 212), using within-family tests of association. No association was found between any of the three markers in either of the two populations. Although we found some evidence for the preferential transmission of a rare haplotype (iong-allele/9-repeat-allele/T-allele; X-2 = 4.5, P=0.034), we concluded that this most likely occurred by chance factors alone. (c) 2005 Wiley-Liss, Inc

U2 - 10.1002/ajmg.b.30203

DO - 10.1002/ajmg.b.30203

M3 - Article

SN - 1552-485X

VL - 139B

SP - 11

EP - 13

JO - American Journal of Medical Genetics. Part B: Neuropsychiatric Genetics

JF - American Journal of Medical Genetics. Part B: Neuropsychiatric Genetics

IS - 1

ER -