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Multitasking Kinase RIPK1 Regulates Cell Death and Inflammation
1Department of Physiological Chemistry, Genentech, South San Francisco, California 94080, USA.
Abstract:
Receptor-interacting serine threonine kinase 1 (RIPK1) is a widely expressed kinase that is essential for limiting inflammation in both mice and humans. Mice lacking RIPK1 die at birth from multiorgan inflammation and aberrant cell death, whereas humans lacking RIPK1 are immunodeficient and develop very early-onset inflammatory bowel disease. In contrast to complete loss of RIPK1, inhibiting the kinase activity of RIPK1 genetically or pharmacologically prevents cell death and inflammation in several mouse disease models. Indeed, small molecule inhibitors of RIPK1 are in phase I clinical trials for amyotrophic lateral sclerosis, and phase II clinical trials for psoriasis, rheumatoid arthritis, and ulcerative colitis. This review focuses on which signaling pathways use RIPK1, how activation of RIPK1 is regulated, and when activation of RIPK1 appears to be an important driver of inflammation.
Insights
Receptor-interacting serine threonine kinase 1 (RIPK1) is crucial for preventing inflammation and cell death. Inhibiting RIPK1 kinase activity shows therapeutic potential for inflammatory diseases.
Area of Science:
- Immunology
- Molecular Biology
- Cell Biology
Background:
- Receptor-interacting serine threonine kinase 1 (RIPK1) is vital for regulating inflammation and cell death.
- Complete RIPK1 deficiency causes severe inflammatory phenotypes in mice and humans.
- RIPK1 kinase activity inhibition offers a therapeutic strategy for inflammatory conditions.
Purpose of the Study:
- To review the signaling pathways involving RIPK1.
- To explore the regulation of RIPK1 activation.
- To identify the role of RIPK1 activation in driving inflammation.
Main Methods:
- Literature review of RIPK1 signaling.
- Analysis of genetic and pharmacological inhibition studies.
- Examination of RIPK1's role in disease models.
Main Results:
- RIPK1 is essential for limiting inflammation and preventing aberrant cell death.
- Inhibiting RIPK1 kinase activity ameliorates disease phenotypes in mouse models.
- RIPK1 inhibitors are under clinical investigation for neurodegenerative and autoimmune diseases.
Conclusions:
- RIPK1 plays a critical role in inflammatory and cell death pathways.
- Targeting RIPK1 kinase activity is a promising therapeutic approach for inflammatory diseases.
- Further research is needed to understand RIPK1 regulation and its specific roles in various inflammatory conditions.
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