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Updated: Nov 6, 2025

Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
Published on: August 7, 2018
MLKL in cancer: more than a necroptosis regulator
Sofie Martens1,2, Jolien Bridelance1,2, Ria Roelandt1
1Cell Death and Inflammation Lab, VIB Center for Inflammation Research, Ghent, Belgium.
Abstract:
Mixed lineage kinase domain-like protein (MLKL) emerged as executioner of necroptosis, a RIPK3-dependent form of regulated necrosis. Cell death evasion is one of the hallmarks of cancer. Besides apoptosis, some cancers suppress necroptosis-associated mechanisms by for example epigenetic silencing of RIPK3 expression. Conversely, necroptosis-elicited inflammation by cancer cells can fuel tumor growth. Recently, necroptosis-independent functions of MLKL were unraveled in receptor internalization, ligand-receptor degradation, endosomal trafficking, extracellular vesicle formation, autophagy, nuclear functions, axon repair, neutrophil extracellular trap (NET) formation, and inflammasome regulation. Little is known about the precise role of MLKL in cancer and whether some of these functions are involved in cancer development and metastasis. Here, we discuss current knowledge and controversies on MLKL, its structure, necroptosis-independent functions, expression, mutations, and its potential role as a pro- or anti-cancerous factor. Analysis of MLKL expression patterns reveals that MLKL is upregulated by type I/II interferon, conditions of inflammation, and tissue injury. Overall, MLKL may affect cancer development and metastasis through necroptosis-dependent and -independent functions.
Insights
Mixed lineage kinase domain-like protein (MLKL) executes necroptosis and has roles beyond cell death. This protein may influence cancer development and metastasis through both necroptosis-dependent and -independent functions.
Area of Science:
- Cell Biology
- Cancer Biology
- Molecular Oncology
Background:
- Mixed lineage kinase domain-like protein (MLKL) is the executioner of necroptosis, a regulated necrosis pathway.
- Cancer cells can evade cell death, including necroptosis, and inflammation from necroptosis can promote tumor growth.
- Emerging evidence highlights necroptosis-independent functions of MLKL in various cellular processes.
Purpose of the Study:
- To review current knowledge and controversies surrounding MLKL in cancer.
- To explore MLKL's structure, expression, mutations, and potential roles in cancer development and metastasis.
- To discuss both necroptosis-dependent and -independent functions of MLKL in oncology.
Main Methods:
- Literature review and analysis of existing research on MLKL.
- Examination of MLKL expression patterns in relation to inflammation and tissue injury.
- Discussion of reported MLKL mutations and their implications.
Main Results:
- MLKL expression is upregulated by type I/II interferon, inflammation, and tissue injury.
- MLKL exhibits diverse necroptosis-independent functions, including roles in receptor trafficking, autophagy, and immune regulation.
- The precise role of MLKL in cancer, as a pro- or anti-cancer factor, remains under investigation.
Conclusions:
- MLKL's multifaceted roles, encompassing both necroptosis execution and necroptosis-independent functions, suggest a complex involvement in cancer.
- Understanding MLKL's regulation and functions is crucial for deciphering its impact on tumor progression and metastasis.
- Further research is warranted to elucidate MLKL's precise contribution to cancer development and its potential as a therapeutic target.
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