SRA

Nonalcoholic steatohepatitis (NASH) is epidemiologically associated with obesity and diabetes and can lead to liver cirrhosis and hepatocellular carcinoma if left untreated. The intricate signaling pathways that orchestrate hepatocyte energy metabolism and cellular stress, intrahepatic cell crosstalk, as well as interplay between peripheral tissues remain elusive and are crucial for the development of anti-NASH therapies. Herein, we reveal E3 ligase FBXW7 as a key factor regulating hepatic catabolism, stress responses, systemic energy homeostasis, and NASH pathogenesis, with attenuated FBXW7 expression as a feature of advanced NASH. Multiomics analysis and pharmacological intervention showed that loss of FBXW7 function in hepatocytes disrupts a metabolic transcriptional axis conjointly controlled by the nutrient-sensing nuclear receptors ERRa and PPARa, resulting in suppression of fatty acid oxidation, elevated ER stress, apoptosis, immune infiltration, fibrogenesis, and ultimately NASH progression. These results provide the foundation for developing alternative strategies co-targeting ERRa and PPARa for the treatment of NASH. Overall design: RNA-seq analysis of livers (n=4) isolated from WT and ERRa KO mice on a C57BL/6N genetic background fed either a chow or high-fat diet (HFD) for 15 weeks initiated from 6 weeks of age.