[Show abstract][Hide abstract] ABSTRACT: Catechol-O-methyltransferase (COMT) and dopamine-beta hydroxylase (DBH) are key enzymes to breakdown dopamine. Some previous studies have indicated that val158met in COMT and 19 bp insertion/deletion in 5' flank of DBH are related to the performance of executive function. To further investigate the associations of the two genes with executive function, we performed a population-based study in a Chinese Han population. The results indicated that val158met in COMT and the 19 bp insertion/deletion of DBH were associated with the average reaction time of response inhibition in female group (P = 0.01, P = 0.03), respectively. Furthermore, there was a significant interaction of the two genes on the reaction time (P = 0.006). This present study suggests that not only do COMT and DBH influence independently on response inhibition in females, but also exert a significant interaction on response inhibition.
[Show abstract][Hide abstract] ABSTRACT: 5-hydroxytryptamine receptor 2A (5-HT2A) participates in diverse psychiatric disorders by regulating the activity of serotonin. Some previous studies have also suggested that the receptor is involved in cognitive abilities of disease groups. We hypothesize that some functional genetic variants in 5-HT2A have certain specific influences on cognitive abilities in a normal population.
To confirm this hypothesis, two polymorphisms (rs6313 and rs4941573) in 5-HT2A were selected, and a population-based study was performed in a young healthy Chinese Han cohort.
The results indicated that the rs6313 and rs4941573 were associated with touching blocks and mental rotation-3D error ratio in males, and the rs4941573 was associated with visuo-spatial working memory in the whole cohort.
All the findings suggest that 5-HT2A participates in human spatial cognitive abilities and spatial working memory.
The Canadian journal of neurological sciences. Le journal canadien des sciences neurologiques 03/2011; 38(2):303-8. DOI:10.1017/S0317167100011513 · 1.53 Impact Factor