Expression and Function of BMP and Activin Membrane-Bound Inhibitor (BAMBI) in Chronic Liver Diseases and Hepatocellular Carcinoma
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES(2023)
摘要
BAMBI (bone morphogenetic protein and activin membrane-bound inhibitor) is a transmembrane pseudoreceptor structurally related to transforming growth factor (TGF)-beta type 1 receptors (TGF-beta 1Rs). BAMBI lacks a kinase domain and functions as a TGF-beta 1R antagonist. Essential processes such as cell differentiation and proliferation are regulated by TGF-beta 1R signaling. TGF-beta is the best-studied ligand of TGF-beta Rs and has an eminent role in inflammation and fibrogenesis. Liver fibrosis is the end stage of almost all chronic liver diseases, such as non-alcoholic fatty liver disease, and at the moment, there is no effective anti-fibrotic therapy available. Hepatic BAMBI is downregulated in rodent models of liver injury and in the fibrotic liver of patients, suggesting that low BAMBI has a role in liver fibrosis. Experimental evidence convincingly demonstrated that BAMBI overexpression is able to protect against liver fibrosis. Chronic liver diseases have a high risk of hepatocellular carcinoma (HCC), and BAMBI was shown to exert tumor-promoting as well as tumor-protective functions. This review article aims to summarize relevant studies on hepatic BAMBI expression and its role in chronic liver diseases and HCC.
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关键词
liver fibrosis,immune cells,hepatic stellate cells,beta-catenin,bone morphogenetic proteins
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