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Learn MoreFarnesoid X receptor (FXR) agonism is emerging as an important potential therapeutic mechanism of action for multiple chronic liver diseases. The bile acidderived FXR agonist obeticholic acid (OCA; 6-ethyl chenodeoxycholic acid) has shown promise in a phase 2 study in patients with nonalcoholic steatohepatitis (NASH). Here, we report efficacy of a novel, nonbile acid FXR agonist tropifexor (LJN452) in two distinct preclinical models of NASH. The efficacy of tropifexor at <1 mg/kg doses was superior to that of OCA at 25 mg/kg in the liver in both NASH models. In a chemical and dietary model of NASH (STAM model), tropifexor reversed established fibrosis and reduced nonalcoholic fatty liver disease activity score and hepatic triglycerides. In an insulin-resistant, obese NASH model (AMLN), tropifexor markedly reduced steatohepatitis, fibrosis, and profibrogenic gene expression. Transcriptome analysis of livers from AMLN mice revealed 461 differentially expressed genes following tropifexor treatment, which included a combination of signatures associated with reduction of oxidative stress, fibrogenesis, and inflammation. Conclusion: Based on the preclinical validation in animal models, tropifexor is a promising investigational therapy that is currently under phase 2 development for NASH. SOURCE: Bin Fang (bfang@gnf.org) - Genomics Institute of Novartis Foundation
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