Send to

Choose Destination
Gene. 2012 Apr 1;496(2):97-102. doi: 10.1016/j.gene.2012.01.015. Epub 2012 Jan 24.

Association between the catechol-O-methyltransferase (rs4680: Val158Met) polymorphism and serum alanine aminotransferase activity.

Author information

Department of Preventive Medicine, Institute of Health Biosciences, the University of Tokushima Graduate School, Tokushima, Japan.


In our previous proteomic study in rat liver damaged by carbon tetrachloride, soluble catechol-O-methyltransferase (COMT) increased as a phosphorylated form and decreased as a dephosphorylated form. This finding raised the possibility that the COMT protein is associated with liver function. Thus, we hypothesized that (1) the COMT gene contributes to liver homeostasis and (2) a COMT polymorphism (rs4680: Val158Met) causing thermolability of enzymatic activity affects liver enzymes (e.g., aspartate aminotransferase (AST), alanine aminotransferase (ALT) and gamma-glutamyl transpeptidase (γ-GT)) in serum. To investigate (2), we statistically analyzed the association between COMT genotypes and serum ALT activity in a cross-sectional study using data from the Japan Multi-Institutional Collaborative Cohort (J-MICC) Study. We conducted a multiple logistic regression analysis for males (n=838) and females (n=970). Those participants having missing values or a past history of liver cirrhosis or liver cancer were excluded. ALT values were divided into two; elevated (30IU/L ≤; males n=239, females n=90) and normal (<30IU/L; males n=599, females n=880). In females, non-adjusted and adjusted odds ratios for ALT values in the rs4680 A/A homozygote (n=126) compared with the wild-type G/G homozygote (n=397) were 0.37 (95% CI 0.14-0.96) and 0.34 (95% CI 0.13-0.93), respectively. In males, an analysis of the population aged 35-69 did not reveal any significant difference, but the population aged 45-54 had a significant difference in the non-adjusted and adjusted odds ratio in the G/A heterozygote (n=89) (0.50 (95% CI 0.27-0.92) and 0.35 (95% CI 0.18-0.71)) and in the A/A homozygote (n=22) (0.34 (95% CI 0.11-0.99) and 0.22 (95% CI 0.07-0.72)), compared with the G/G homozygote (n=88). These data suggest that the COMT polymorphism affects serum ALT activity to maintain liver function.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center