I148M patatin-like phospholipase domain-containing 3 gene variant and severity of pediatric nonalcoholic fatty liver disease

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
L ValentiV Nobili

Abstract

Nonalcoholic fatty liver disease (NAFLD) is one of the most common causes of chronic liver disease in children. Genetic variability, which is a main player in NAFLD, is especially characterized by polymorphisms in genes involved in the development and progression of the disease to nonalcoholic steatohepatitis (NASH). Recently, the rs738409 C>G adiponutrin/patatin-like phospholipase domain-containing 3 (PNPLA3) polymorphism, which encodes the I148M protein variant in the catalytic domain, has been associated with severe steatosis, NASH, and liver fibrosis in adults. In this study, we investigated the association between the rs738409 PNPLA3 gene polymorphism and NAFLD in 149 consecutive children and adolescents (age = 6-13 years) with biopsy-proven NAFLD. We analyzed the rs738409 polymorphism by a 5'-nuclease TaqMan assay and assessed its association with NASH: 41% of the subjects with NAFLD showed heterozygosity and 15% showed homozygosity for the at-risk G allele. The rs738409 genotype did not influence the body mass, adiposity, lipid levels, or insulin resistance and was not associated with alanine aminotransferase levels. Interestingly, the rs738409 G allele was strongly associated with the severity of steatosis (P < 0.0001),...Continue Reading

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