Related Experiment Video

Updated: Mar 8, 2026

Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells
09:04

Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells

Published on: May 22, 2014

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MLKL Activation Triggers NLRP3-Mediated Processing and Release of IL-1β Independently of Gasdermin-D

Kimberley D Gutierrez1, Michael A Davis1, Brian P Daniels1

  • 1Department of Immunology, University of Washington, Seattle, WA 98109.

Journal of Immunology (Baltimore, Md. : 1950)
|January 29, 2017
PubMed

Insights

Mixed lineage kinase domain-like (MLKL) activation during necroptosis triggers IL-1β release. This process involves potassium efflux and NLRP3 inflammasome assembly, independent of gasdermin-D.

Area of Science:

  • Cellular Biology
  • Immunology
  • Molecular Biology

Background:

  • Necroptosis is programmed cell death initiated by RIPK3 and MLKL.
  • Activated MLKL disrupts the cell membrane, causing ion imbalance.
  • Interleukin-1 beta (IL-1β) is a key inflammatory cytokine.

Purpose of the Study:

  • To investigate if MLKL activation alone can induce IL-1β processing and release.
  • To elucidate the role of MLKL in IL-1β release during necroptosis.
  • To determine the mechanism of IL-1β release independent of gasdermin-D.

Main Methods:

  • Utilized a small-molecule ligand to specifically trigger MLKL activation.
  • Measured IL-1β processing and release.
  • Assessed potassium efflux and NLRP3 inflammasome assembly.
  • Investigated MLKL's role in membrane disruption and IL-1β release.

Main Results:

  • MLKL activation was sufficient to process and release bioactive IL-1β.
  • MLKL activation induced potassium efflux and NLRP3 inflammasome assembly.
  • Cell membrane disruption by MLKL facilitated IL-1β release independently of gasdermin-D.
  • MLKL acts as an endogenous activator of the NLRP3 inflammasome.

Conclusions:

  • MLKL activation is a key driver for IL-1β processing and release during necroptosis.
  • MLKL-mediated membrane disruption provides a pathway for IL-1β release independent of gasdermin-D.
  • This study identifies MLKL as a crucial component in regulating IL-1β secretion via the NLRP3 inflammasome.

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