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Nature. 2011 Jan 13;469(7329):221-5. doi: 10.1038/nature09663. Epub 2010 Dec 1.

A role for mitochondria in NLRP3 inflammasome activation.

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1
Department of Biochemistry, Center of Immunity and Infection, University of Lausanne, Chemin des Boveresses 155, CH-1066 Epalinges, Switzerland.

Erratum in

  • Nature. 2011 Jul 7;475(7354):122.

Abstract

An inflammatory response initiated by the NLRP3 inflammasome is triggered by a variety of situations of host 'danger', including infection and metabolic dysregulation. Previous studies suggested that NLRP3 inflammasome activity is negatively regulated by autophagy and positively regulated by reactive oxygen species (ROS) derived from an uncharacterized organelle. Here we show that mitophagy/autophagy blockade leads to the accumulation of damaged, ROS-generating mitochondria, and this in turn activates the NLRP3 inflammasome. Resting NLRP3 localizes to endoplasmic reticulum structures, whereas on inflammasome activation both NLRP3 and its adaptor ASC redistribute to the perinuclear space where they co-localize with endoplasmic reticulum and mitochondria organelle clusters. Notably, both ROS generation and inflammasome activation are suppressed when mitochondrial activity is dysregulated by inhibition of the voltage-dependent anion channel. This indicates that NLRP3 inflammasome senses mitochondrial dysfunction and may explain the frequent association of mitochondrial damage with inflammatory diseases.

PMID:
21124315
DOI:
10.1038/nature09663
[Indexed for MEDLINE]
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