TY - JOUR
T1 - No association between catechol-O-methyltransferase (COMT) gene polymorphism and attention deficit hyperactivity disorder (ADHD) in an Irish sample
AU - Hawi, Ziarih
AU - Millar, Niamh
AU - Daly, Grainne
AU - Fitzgerald, Michael
AU - Gill, Michael
PY - 2000/6/12
Y1 - 2000/6/12
N2 - Pharmacological and biochemical studies have indicated that imbalances in dopaminergic transmission may contribute to the aetiology of attention deficit hyperactivity disorder (ADHD). The enzyme catechol-O- methyltransferase (COMT) plays a key role in the degradation of catecholamines such as dopamine, L-DOPA, adrenaline, and noradrenaline and therefore could be considered as a candidate locus for ADHD susceptibility. We hypothesised that a proportion of the genetic susceptibility to ADHD may be a consequence of dopamine depletion in the synapses due to high-level activity of the COMT gene (allele 1). Using the haplotype-based haplotype relative risk method and 94 affected children and their parents genotyped for COMT alleles, we found no significant differences in the frequency of the transmitted and nontransmitted alleles to ADHD cases from their parents. The absence of association between COMT alleles and ADHD indicated that this locus does not play a significant role or at least a role independent of other genes, in predisposing to ADHD in the Irish population. (C) 2000 Wiley- Liss, Inc.
AB - Pharmacological and biochemical studies have indicated that imbalances in dopaminergic transmission may contribute to the aetiology of attention deficit hyperactivity disorder (ADHD). The enzyme catechol-O- methyltransferase (COMT) plays a key role in the degradation of catecholamines such as dopamine, L-DOPA, adrenaline, and noradrenaline and therefore could be considered as a candidate locus for ADHD susceptibility. We hypothesised that a proportion of the genetic susceptibility to ADHD may be a consequence of dopamine depletion in the synapses due to high-level activity of the COMT gene (allele 1). Using the haplotype-based haplotype relative risk method and 94 affected children and their parents genotyped for COMT alleles, we found no significant differences in the frequency of the transmitted and nontransmitted alleles to ADHD cases from their parents. The absence of association between COMT alleles and ADHD indicated that this locus does not play a significant role or at least a role independent of other genes, in predisposing to ADHD in the Irish population. (C) 2000 Wiley- Liss, Inc.
KW - Association
KW - Attention deficit hyperactivity disorder (ADHD)
KW - Catechol-O- methyltransferase (COMT)
KW - Dopamine
UR - http://www.scopus.com/inward/record.url?scp=0034640682&partnerID=8YFLogxK
U2 - 10.1002/1096-8628(20000612)96:3<282::AID-AJMG9>3.0.CO;2-R
DO - 10.1002/1096-8628(20000612)96:3<282::AID-AJMG9>3.0.CO;2-R
M3 - Article
C2 - 10898900
AN - SCOPUS:0034640682
VL - 96
SP - 282
EP - 284
JO - American Journal of Medical Genetics Part B: Neuropsychiatric Genetics
JF - American Journal of Medical Genetics Part B: Neuropsychiatric Genetics
SN - 1552-4841
IS - 3
ER -