Related Experiment Video

Updated: Jan 25, 2026

Activation and Measurement of NLRP3 Inflammasome Activity Using IL-1β in Human Monocyte-derived Dendritic Cells
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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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Fyn kinase regulates misfolded α-synuclein uptake and NLRP3 inflammasome activation in microglia

Nikhil Panicker1,2,3, Souvarish Sarkar1, Dilshan S Harischandra1

  • 1Parkinson Disorders Research Program, Iowa Center for Advanced Neurotoxicology, Department of Biomedical Sciences, Iowa State University, Ames, IA.

The Journal of Experimental Medicine
|May 1, 2019
PubMed

Insights

Persistent microglia activation drives Parkinson's disease (PD) progression. This study reveals Fyn kinase and CD36 control microglial uptake of alpha-synuclein, amplifying neuroinflammation via the NLRP3 inflammasome.

Area of Science:

  • Neuroscience
  • Immunology
  • Cell Biology

Background:

  • Persistent microglia-mediated neuroinflammation is a key driver of Parkinson's disease (PD) pathogenesis.
  • The precise cell-signaling pathways governing chronic microglial activation in PD remain incompletely understood.

Purpose of the Study:

  • To elucidate the signaling mechanisms by which microglia contribute to Parkinson's disease progression.
  • To investigate the role of Fyn kinase and CD36 in microglial response to aggregated alpha-synuclein (αSyn).

Main Methods:

  • Investigated the interaction between Fyn kinase, CD36, and aggregated αSyn in microglial activation.
  • Utilized LPS-independent priming and activation assays for the NLRP3 inflammasome.
  • Employed in vivo mouse models (A53T and viral-αSyn overexpression) and human PD brain tissue analysis.

Main Results:

  • Fyn kinase and CD36 regulate microglial uptake of aggregated αSyn, a key component of Lewy bodies.
  • αSyn triggers LPS-independent priming and activation of the microglial NLRP3 inflammasome.
  • Fyn kinase mediates PKCδ-dependent NF-κB-p65 nuclear translocation for inflammasome priming and facilitates αSyn import, leading to mitochondrial ROS generation and inflammasome activation.

Conclusions:

  • Identified a novel Fyn kinase-mediated signaling pathway that amplifies neuroinflammation in Parkinson's disease.
  • This pathway involves the regulation of αSyn uptake and NLRP3 inflammasome activation by Fyn kinase and CD36.

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