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Identification and Characterization of Metastatic Factors by Gene Transfer into the Novel RIP-Tag; RIP-tva Murine Model
Published on: October 16, 2017
RIP Kinases in Liver Cell Death, Inflammation and Cancer
Vangelis Kondylis1, Manolis Pasparakis1
1Institute for Genetics, University of Cologne, D-50674 Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, D-50931 Cologne, Germany; Center for Molecular Medicine (CMMC), University of Cologne, D-50931, Cologne, Germany.
Abstract:
Cell death is intrinsically linked to inflammatory liver disease and cancer development. Recent genetic studies have suggested that receptor-interacting protein kinase (RIPK)1 is implicated in liver disease pathogenesis by regulating caspase-dependent hepatocyte apoptosis induced by tumor necrosis factor (TNF) or other stimuli. In contrast, the contribution of caspase-independent RIPK3/mixed lineage kinase like (MLKL)-mediated hepatocyte necroptosis remains debatable. Hepatocyte apoptosis depends on the balance between RIPK1 prosurvival scaffolding functions and its kinase-activity-mediated proapoptotic function. Several regulatory steps promote the prosurvival role of RIPK1, including phosphorylation and ubiquitination of RIPK1 itself and other molecules involved in RIPK1 signaling. Pharmacological inhibition of liver damage by targeting RIPK1 signaling emerges as a potential therapeutic strategy to prevent chronic liver inflammation and hepatocarcinogenesis.
Insights
Receptor-interacting protein kinase 1 (RIPK1) regulates liver cell death, impacting inflammatory liver disease and cancer. Targeting RIPK1 signaling offers a potential therapeutic strategy for liver damage and associated diseases.
Area of Science:
- * Hepatology and molecular biology research.
- * Investigating cell death pathways in liver disease pathogenesis.
Background:
- * Cell death is closely linked to inflammatory liver disease and cancer.
- * Receptor-interacting protein kinase 1 (RIPK1) plays a role in liver disease by regulating hepatocyte apoptosis.
- * The role of RIPK1/RIPK3/MLKL-mediated necroptosis in hepatocytes is not fully understood.
Purpose of the Study:
- * To elucidate the role of RIPK1 in hepatocyte apoptosis and necroptosis.
- * To explore the balance between RIPK1's scaffolding and kinase functions in cell death.
- * To assess the therapeutic potential of targeting RIPK1 signaling in liver disease.
Main Methods:
- * Review of genetic studies and signaling pathways.
- * Analysis of RIPK1 phosphorylation and ubiquitination.
- * Discussion of pharmacological inhibition strategies.
Main Results:
- * RIPK1 regulates both caspase-dependent apoptosis and potentially necroptosis in hepatocytes.
- * The balance between RIPK1's prosurvival scaffolding and proapoptotic kinase activity is crucial.
- * Regulatory mechanisms like phosphorylation and ubiquitination influence RIPK1's function.
Conclusions:
- * RIPK1 signaling is a key regulator of liver cell death pathways.
- * Targeting RIPK1 offers a promising therapeutic avenue for chronic liver inflammation and cancer.
- * Further research into RIPK1-mediated necroptosis is warranted.
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