Abstract
Non-alcoholic fatty liver disease (NAFLD) is a multifactorial disorder with complicated pathophysiology. Trimethylamine-N-oxide (TMAO) has been thought to be correlated with the pathogenesis of NAFLD. The single nucleotide polymorphisms (SNPs) of hepatic flavin-containing monooxygenase 3 (FMO3) regulate the concentration of TMAO. This case-control study investigated the plasma levels of TMAO as well as its possible correlation with the frequency of specific genotype of FMO3 (-2650C>G, -2543T>A, -2177G>C, -2589C>T, -2106G>A polymorphisms) in Kurdish patients with NAFLD. METHODS ANDRESULTS: In 85 confirmed NAFLD patients and 30 healthy individuals, triglycerides (TG), total cholesterol (Chol), low-density lipoprotein (LDL), high-density lipoprotein (HDL), alanine aminotransferase (ALT), and aspartate aminotransferase (AST) activities were measured. TMAO was also measured using the LC-MS/MS method. High-resolution melting analysis was applied to determine FMO3 genotypes. Plasma TMAO levels were significantly higher in patients (p = 0.030). A CC genotype with a frequency of 12.9% for SNP -2177G>C was found in Kurdish NAFLD patients. The distribution of the GC genotype was also significantly different (p = 0.017). The current results provide documentation for high circulatory levels of TMAO and its possible correlation with the presence of the specific genotype -2177G>C FMO3 in Kurdish NAFLD patients.
Published Version
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