Pin1 is involved in inflammatory diseases such as non-alcoholic steatohepatitis (NASH) (Nakatsu et al., 2012), atherosclerosis (Paneni et al., 2015), rheumatoid arthritis (Jeong et al., 2009), and biliary cholangitis (Asuri et al., 2018). Here, PIN1 is linked to metabolic dysfunction-associated steatohepatitis.