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Science 320 (5876): 674-677

Copyright © 2008 by the American Association for the Advancement of Science

Innate Immune Activation Through Nalp3 Inflammasome Sensing of Asbestos and Silica

Catherine Dostert,1 Virginie Pétrilli,1 Robin Van Bruggen,2 Chad Steele,3 Brooke T. Mossman,4 Jürg Tschopp1*

Abstract: The inhalation of airborne pollutants, such as asbestos or silica, is linked to inflammation of the lung, fibrosis, and lung cancer. How the presence of pathogenic dust is recognized and how chronic inflammatory diseases are triggered are poorly understood. Here, we show that asbestos and silica are sensed by the Nalp3 inflammasome, whose subsequent activation leads to interleukin-1β secretion. Inflammasome activation is triggered by reactive oxygen species, which are generated by a NADPH oxidase upon particle phagocytosis. (NADPH is the reduced form of nicotinamide adenine dinucleotide phosphate.) In a model of asbestos inhalation, Nalp3–/– mice showed diminished recruitment of inflammatory cells to the lungs, paralleled by lower cytokine production. Our findings implicate the Nalp3 inflammasome in particulate matter–related pulmonary diseases and support its role as a major proinflammatory "danger" receptor.

1 Department of Biochemistry, University of Lausanne, Chemin des Boveresses 155, 1066 Epalinges, Switzerland.
2 Department of Blood Cell Research, Sanquin Research and Landsteiner Laboratory, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands.
3 Department of Medicine, Division of Pulmonary, Allergy, and Critical Care Medicine, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294, USA.
4 Department of Pathology, University of Vermont College of Medicine, Burlington, VT 05405, USA.

* To whom correspondence should be addressed. E-mail: jurg.tschopp{at}unil.ch


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cutting Edge: Alum Adjuvant Stimulates Inflammatory Dendritic Cells through Activation of the NALP3 Inflammasome.
M. Kool, V. Petrilli, T. De Smedt, A. Rolaz, H. Hammad, M. van Nimwegen, I. M. Bergen, R. Castillo, B. N. Lambrecht, and J. Tschopp (2008)
J. Immunol. 181, 3755-3759
   Abstract »    Full Text »    PDF »

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Science Signaling. ISSN 1937-9145 (pre-2008: Science's STKE. ISSN 1525-8882)