1. Hepatocyte-specific CCAAT/enhancer binding protein [alpha] restricts liver fibrosis progression
- Author
-
Yan, Tingting, Yan, Nana, Xia, Yangliu, Sawaswong, Vorthon, Zhu, Xinxin, Dias, Henrique Bregolin, Aibara, Daisuke, Takahashi, Shogo, Hamada, Keisuke, Saito, Yoshifumi, Li, Guangming, Liu, Hui, Yan, Hualong, Velenosi, Thomas J., Krausz, Kristopher W., Huang, Jing, Kimura, Shioko, Rotman, Yaron, Qu, Aijuan, Hao, Haiping, and Gonzalez, Frank J.
- Subjects
United States. National Institutes of Health ,Fibrosis -- Development and progression ,Carbon tetrachloride -- Health aspects ,Protein binding -- Health aspects ,Messenger RNA -- Health aspects ,Fructose -- Health aspects ,Liver -- Health aspects ,Liver diseases -- Development and progression ,Health care industry - Abstract
Metabolic dysfunction-associated steatohepatitis (MASH)--previously described as nonalcoholic steatohepatitis (NASH)--is a major driver of liver fibrosis in humans, while liver fibrosis is a key determinant of all-cause mortality in liver disease independent of MASH occurrence. CCAAT/enhancer binding protein [alpha] (CEBPA), as a versatile ligandindependent transcriptional factor, has an important function in myeloid cells, and is under clinical evaluation for cancer therapy. CEBPA is also expressed in hepatocytes and regulates glucolipid homeostasis; however, the role of hepatocytespecific CEBPA in modulating liver fibrosis progression is largely unknown. Here, hepatic CEBPA expression was found to be decreased during MASH progression both in humans and mice, and hepatic CEBPA mRNA was negatively correlated with MASH fibrosis in the human liver. [Cebpa.sup.[DELTA]Hep] mice had markedly enhanced liver fibrosis induced by a high-fat, high-cholesterol, high-fructose diet or carbon tetrachloride. Temporal and spatial hepatocyte-specific CEBPA loss at the progressive stage of MASH in [Cebpa.sup.[DELTA]Hep,ERT2] mice functionally promoted liver fibrosis. Mechanistically, hepatocyte CEBPA directly repressed Spp1 transactivation to reduce the secretion of osteopontin, a fibrogenesis inducer of hepatic stellate cells. Forced hepatocyte-specific CEBPA expression reduced MASH-associated liver fibrosis. These results demonstrate an important role for hepatocyte-specific CEBPA in liver fibrosis progression, and may help guide the therapeutic discoveries targeting hepatocyte CEBPA for the treatment of liver fibrosis., Introduction Growing clinical evidence revealed that liver fibrosis is a main determinant of outcomes or all-cause mortality in liver disease (1-6). Metabolic dysfunction-associated steatotic liver disease (MASLD), previously known as [...]
- Published
- 2024
- Full Text
- View/download PDF