Silent information regulators are a family of highly conserved nicotinamide adenine dinucleotide( NAD+)-dependent deacetylases and has seven members( Sirt1-7). Silent information regulator 4( Sirt4),localized in the mitochondria,possesses the activity of deacetylase,ADP-ribosyltransferase,NAD+-dependent lipoamidase,and deacylase,participates in post-translational modification of mitochondrial proteins,and regulates multiple metabolic processes. Since metabolic dysfunction is closely associated with liver diseases,the role and regulatory mechanism of Sirt4 in liver diseases has attracted more and more attention. This article elaborates on the role of Sirt4 in viral hepatitis,nonalcoholic fatty liver disease,liver fibrosis,and hepatocellular carcinoma,in order to provide new perspectives for the prevention and treatment of these liver diseases.
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