NR1H4 and primary biliary cholangitis: For example, semi-synthetic or non-steroidal synthetic agonists of FXR, including obeticholic acid (OCA) and hammerhead-type agonists, such as tropifexor and cilofexor, are currently in clinical trials for NASH and PBC patients (Abenavoli et al., 2018; Kremoser, 2021; Sanyal et al., 2023; Tully et al., 2017).