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RIPK3 promoter hypermethylation in hepatocytes protects from bile acid-induced inflammation and necroptosis
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RIPK3 promoter hypermethylation in hepatocytes protects from bile acid-induced inflammation and necroptosis
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RIPK3 promoter hypermethylation in hepatocytes protects from bile acid-induced inflammation and necroptosis
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Journal Article
RIPK3 promoter hypermethylation in hepatocytes protects from bile acid-induced inflammation and necroptosis
2023
Overview
Necroptosis facilitates cell death in a controlled manner and is employed by many cell types following injury. It plays a significant role in various liver diseases, albeit the cell-type-specific regulation of necroptosis in the liver and especially hepatocytes, has not yet been conceptualized. We demonstrate that DNA methylation suppresses RIPK3 expression in human hepatocytes and HepG2 cells. In diseases leading to cholestasis, the RIPK3 expression is induced in mice and humans in a cell-type-specific manner. Overexpression of RIPK3 in HepG2 cells leads to RIPK3 activation by phosphorylation and cell death, further modulated by different bile acids. Additionally, bile acids and RIPK3 activation further facilitate JNK phosphorylation, IL-8 expression, and its release. This suggests that hepatocytes suppress RIPK3 expression to protect themselves from necroptosis and cytokine release induced by bile acid and RIPK3. In chronic liver diseases associated with cholestasis, induction of RIPK3 expression may be an early event signaling danger and repair through releasing IL-8.
Publisher
Nature Publishing Group UK,Springer Nature B.V,Nature Publishing Group
Subject
/ 13/109
/ 13/51
/ 14/19
/ 38/23
/ 38/39
/ 38/70
/ 38/77
/ 64/60
/ 82/58
/ 82/80
/ Animals
/ Bile
/ Bile Acids and Salts - metabolism
/ Biomedical and Life Sciences
/ Humans
/ Mice
/ Receptor-Interacting Protein Serine-Threonine Kinases - genetics
/ Receptor-Interacting Protein Serine-Threonine Kinases - metabolism
