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Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis
08:55

Characterization of MLKL-mediated Plasma Membrane Rupture in Necroptosis

Published on: August 7, 2018

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MLKL regulates necrotic plasma membrane permeabilization

Lorenzo Galluzzi1, Oliver Kepp2, Guido Kroemer3

  • 11] Gustave Roussy, Villejuif, France [2] Université Paris Descartes/Paris V, Sorbonne Paris Cité, Paris, France [3] Equipe 11 labellisée Ligue Nationale contre le Cancer, Centre de Recherche des Cordeliers, Paris, France.

Cell Research
|January 15, 2014
PubMed

Insights

New research reveals how mixed lineage kinase domain-like (MLKL) triggers necroptosis. Phosphorylation by RIPK3 causes MLKL to form membrane-damaging oligomers, disrupting cell ion balance.

Area of Science:

  • Cellular biology
  • Molecular mechanisms of cell death

Background:

  • Necroptosis is a regulated form of necrosis.
  • The role of mixed lineage kinase domain-like (MLKL) in necroptosis is under investigation.

Purpose of the Study:

  • To elucidate the molecular mechanisms of MLKL-mediated necroptosis.
  • To understand how MLKL activation leads to plasma membrane permeabilization.

Main Methods:

  • Investigated MLKL oligomerization upon RIPK3 phosphorylation.
  • Examined the localization and function of MLKL oligomers at the plasma membrane.

Main Results:

  • MLKL phosphorylation by RIPK3 induces MLKL oligomer formation.
  • These MLKL oligomers accumulate at the plasma membrane.
  • MLKL oligomers disrupt the plasma membrane's ability to maintain ionic homeostasis, leading to necroptosis.

Conclusions:

  • MLKL oligomerization is a critical step in necroptosis.
  • RIPK3-mediated phosphorylation of MLKL is essential for its oligomerization and subsequent membrane damage.
  • The disruption of ionic homeostasis by MLKL oligomers is a key event in necroptotic cell death.

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