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Detection of Inflammasome Activation and Pyroptotic Cell Death in Murine Bone Marrow-derived Macrophages
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Exposing kinetic disparities between inflammasome readouts using time-resolved analysis.

Matthew Herring1,2,3, Alexander Persson1,2, Ryan Potter3,4

  • 1School of Medical Sciences, Faculty of Medicine and Health, Örebro University, Örebro, Sweden.

Heliyon
|June 13, 2024
PubMed
Summary
This summary is machine-generated.

Time-resolved analysis of the NLRP3 inflammasome reveals potential discrepancies between common readouts. This method offers new quantifiable metrics for inflammasome research, improving our understanding of host defense and disease.

Keywords:
ASC-SpecksCell responseCytokinesHuman macrophagesLDH leakageLive-cell imagingNLRP3 inflammasomeTHP-1 cells

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Area of Science:

  • Immunology
  • Cell Biology

Background:

  • The NLRP3 inflammasome, an intracellular multiprotein complex, plays a crucial role in host defense against pathogens and is implicated in various diseases.
  • Current research on NLRP3 inflammasome activation often relies on endpoint analyses of specific readouts like ASC-speck formation and IL-1β release, assessed independently.

Purpose of the Study:

  • To investigate the utility of time-resolved analysis for commonly measured NLRP3 inflammasome readouts.
  • To introduce novel quantifiable metrics, such as time-resolved absolute change and acceleration, for comparative analysis of inflammasome activation.

Main Methods:

  • Utilized a human macrophage model (differentiated THP-1-ASC-GFP cells) for time-resolved analysis.
  • Applied commonly accessible methods to quantify inflammasome activation over time.

Main Results:

  • The time-resolved approach revealed potential discrepancies between different inflammasome readouts that might be missed by traditional endpoint analysis.
  • Introduced new metrics (time-resolved absolute change and acceleration) enabling direct comparison between various inflammasome activation markers.

Conclusions:

  • Time-resolved data analysis is crucial for a comprehensive understanding of NLRP3 inflammasome dynamics.
  • This methodology can uncover subtle differences in inflammasome activation pathways and has broader applications in immunology and disease research.