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

作者：Hiyoshi Mineyoshi^*; Uemura Hirokazu; Arisawa Kokichi; Nakamoto Mariko; Hishida Asahi; Okada Rieko; Matsuo Keitaro; Kita Yoshikuni; Niimura Hideshi; Kuriyama Nagato; Nanri Hinako; Ohnaka Keizo; Suzuki Sadao; Mikami Haruo; Kubo Michiaki; Tanaka Hideo; Hamajima Nobuyuki

来源：Gene, 2012, 496(2): 97-102.

DOI：10.1016/j.gene.2012.01.015

• Liver function
• Proteomic observation
• Lifestyle
• COMT polymorphism
• Estrogen metabolism
• Tyrosine metabolism

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 (gamma-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 (30 IU/L %26lt;=; males n = 239, females n = 90) and normal (%26lt;30 IU/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 034 (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.

• 出版日期2012-4-1