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Updated: Dec 21, 2025
08:55
Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
Published on: August 7, 2018
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Targeting RIPK3 oligomerization blocks necroptosis without inducing apoptosis
Wenjuan Li1,2, Hengxiao Ni1,2, Shaofeng Wu1,2,3
1School of Life Sciences, Xiamen University, Xiamen, China.
FEBS Letters
|May 16, 2020
Summary
Receptor-interacting serine/threonine-protein kinase 3 (RIPK3) inhibition can treat diseases, but may cause apoptosis. PP2, a RIPK3 inhibitor, blocks necroptosis without inducing apoptosis by disrupting RIPK3 oligomerization.
Area of Science:
- Cellular biology
- Molecular mechanisms of cell death
- Drug discovery
Background:
- Receptor-interacting serine/threonine-protein kinase 3 (RIPK3) is crucial in necroptosis, a programmed cell death pathway implicated in diseases like Crohn's disease.
- Targeting RIPK3 kinase activity is a therapeutic strategy, but can paradoxically trigger apoptosis.
- Developing safe and effective RIPK3 inhibitors is essential for treating necroptosis-associated pathologies.
Discussion:
- PP2, a SRC inhibitor, effectively inhibits TNF-α-induced necroptosis without inducing apoptosis.
- PP2 functions as a dual inhibitor of SRC and RIPK3.
- PP2 disrupts RIPK3 oligomerization, a key step in necroptosis signaling, without affecting RIPK1-RIPK3-MLKL complex integrity or RIPK3 autophosphorylation.
Key Insights:
- RIPK3 oligomerization is essential for downstream MLKL phosphorylation and activation during necroptosis.
- PP2's mechanism involves inhibiting RIPK3 oligomerization rather than its kinase activity.
- This study reveals a novel therapeutic strategy targeting RIPK3 oligomerization.
Outlook:
- Targeting RIPK3 oligomerization offers a promising therapeutic avenue for necroptosis-associated diseases.
- Further research into PP2 and similar compounds could lead to new treatments with improved safety profiles.
- Understanding RIPK3 oligomerization dynamics is critical for advancing necroptosis-targeted therapies.
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