cIAPs Block Ripoptosome Formation and Regulate Cell Death
Author Information
Author(s): Maria Feoktistova, Peter Geserick, Beate Kellert, Diana Panayotova Dimitrova, Claudia Langlais, Mike Hupe, Kelvin Cain, Marion MacFarlane, Georg Häcker, Martin Leverkus
Primary Institution: Medical Faculty Mannheim, University Heidelberg
Hypothesis
Loss of cIAPs promotes the spontaneous formation of an intracellular platform that activates either apoptosis or necroptosis.
Conclusion
The study demonstrates that the Ripoptosome is a critical signaling platform that influences the outcome of cell death pathways.
Supporting Evidence
- Loss of cIAPs leads to the formation of the Ripoptosome, which is necessary for cell death.
- cFLIPL prevents Ripoptosome formation, while cFLIPS promotes it.
- Cells with low RIP1 or high cFLIPL levels are resistant to Ripoptosome formation.
- cFLIPS can protect from apoptosis but promote necroptosis in the absence of cIAPs.
Takeaway
When certain proteins are missing, cells can accidentally trigger a process that leads to their death, and this process can happen in different ways depending on other proteins present.
Methodology
The study involved testing the effects of cIAPs on cell death pathways using various cell lines and inhibitors.
Limitations
The study primarily focuses on specific cell lines, which may not fully represent all cellular contexts.
Digital Object Identifier (DOI)
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