Rare MET Gene Mutation Identified as a Direct Cause of Fatty Liver Disease Researchers at Mayo Clinic have discovered a rare mutation in the MET gene that can directly lead to metabolic dysfunction-associated steatotic liver disease, formerly known as nonalcoholic fatty liver disease. This mutation interferes with the liver's ability to process fat, causing fat accumulation, inflammation, fibrosis, and potentially cirrhosis or liver cancer. The discovery originated from a father-daughter pair who developed severe liver disease despite lacking common risk factors like diabetes or high cholesterol. Extensive genetic analysis revealed a single DNA letter change in the MET gene, disrupting liver fat metabolism. Subsequent examination of the Mayo Clinic Tapestry study, which includes DNA data from over 100,000 participants, found that about 1% of adults with fatty liver disease carried rare MET variants, with nearly 18% located in the same critical region as the original family. The findings highlight how rare genetic variants can underlie common diseases and emphasize the role of precision genomics in uncovering hidden causes. This discovery may guide future targeted therapies and improve diagnosis for millions at risk worldwide, showcasing the value of combining familial case studies with large-scale genomic research.

Rare MET Gene Mutation Identified as a Direct Cause of Fatty Liver Disease

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#genemutation #fattyliverdisease #genomics

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