Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence

Olaf Gross, Hendrik Poeck, Michael Bscheider, Catherine Dostert, Nicole Hannesschläger, Stefan Endres, Gunther Hartmann, Aubry Tardivel, Edina Schweighoffer, Victor Tybulewicz, A. Mócsai, Jürg Tschopp, Jürgen Ruland

Research output: Contribution to journalArticle

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Abstract

Fungal infections represent a serious threat, particularly in immunocompromised patients. Interleukin-1Β (IL-1Β) is a key pro-inflammatory factor in innate antifungal immunity. The mechanism by which the mammalian immune system regulates IL-1Β production after fungal recognition is unclear. Two signals are generally required for IL-1Β production: an NF-B-dependent signal that induces the synthesis of pro-IL-1Β (p35), and a second signal that triggers proteolytic pro-IL-1Β processing to produce bioactive IL-1Β (p17) via Caspase-1-containing multiprotein complexes called inflammasomes. Here we demonstrate that the tyrosine kinase Syk, operating downstream of several immunoreceptor tyrosine-based activation motif (ITAM)-coupled fungal pattern recognition receptors, controls both pro-IL-1Β synthesis and inflammasome activation after cell stimulation with Candida albicans. Whereas Syk signalling for pro-IL-1Β synthesis selectively uses the Card9 pathway, inflammasome activation by the fungus involves reactive oxygen species production and potassium efflux. Genetic deletion or pharmalogical inhibition of Syk selectively abrogated inflammasome activation by C. albicans but not by inflammasome activators such as Salmonella typhimurium or the bacterial toxin nigericin. Nlrp3 (also known as NALP3) was identified as the critical NOD-like receptor family member that transduces the fungal recognition signal to the inflammasome adaptor Asc (Pycard) for Caspase-1 (Casp1) activation and pro-IL-1Β processing. Consistent with an essential role for Nlrp3 inflammasomes in antifungal immunity, we show that Nlrp3-deficient mice are hypersusceptible to Candida albicans infection. Thus, our results demonstrate the molecular basis for IL-1Β production after fungal infection and identify a crucial function for the Nlrp3 inflammasome in mammalian host defence in vivo.

Original languageEnglish
Pages (from-to)433-436
Number of pages4
JournalNature
Volume459
Issue number7245
DOIs
Publication statusPublished - May 21 2009

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Inflammasomes
Interleukin-1
Candida albicans
Caspase 1
Mycoses
Immunoreceptor Tyrosine-Based Activation Motif
Syk Kinase
Nigericin
Bacterial Toxins
Pattern Recognition Receptors
Multiprotein Complexes
Immunocompromised Host
Salmonella typhimurium
Innate Immunity
Protein-Tyrosine Kinases
Immune System
Immunity
Reactive Oxygen Species
Potassium
Fungi

ASJC Scopus subject areas

  • General

Cite this

Gross, O., Poeck, H., Bscheider, M., Dostert, C., Hannesschläger, N., Endres, S., ... Ruland, J. (2009). Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence. Nature, 459(7245), 433-436. https://doi.org/10.1038/nature07965

Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence. / Gross, Olaf; Poeck, Hendrik; Bscheider, Michael; Dostert, Catherine; Hannesschläger, Nicole; Endres, Stefan; Hartmann, Gunther; Tardivel, Aubry; Schweighoffer, Edina; Tybulewicz, Victor; Mócsai, A.; Tschopp, Jürg; Ruland, Jürgen.

In: Nature, Vol. 459, No. 7245, 21.05.2009, p. 433-436.

Research output: Contribution to journalArticle

Gross, O, Poeck, H, Bscheider, M, Dostert, C, Hannesschläger, N, Endres, S, Hartmann, G, Tardivel, A, Schweighoffer, E, Tybulewicz, V, Mócsai, A, Tschopp, J & Ruland, J 2009, 'Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence', Nature, vol. 459, no. 7245, pp. 433-436. https://doi.org/10.1038/nature07965
Gross O, Poeck H, Bscheider M, Dostert C, Hannesschläger N, Endres S et al. Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence. Nature. 2009 May 21;459(7245):433-436. https://doi.org/10.1038/nature07965
Gross, Olaf ; Poeck, Hendrik ; Bscheider, Michael ; Dostert, Catherine ; Hannesschläger, Nicole ; Endres, Stefan ; Hartmann, Gunther ; Tardivel, Aubry ; Schweighoffer, Edina ; Tybulewicz, Victor ; Mócsai, A. ; Tschopp, Jürg ; Ruland, Jürgen. / Syk kinase signalling couples to the Nlrp3 inflammasome for anti-fungal host defence. In: Nature. 2009 ; Vol. 459, No. 7245. pp. 433-436.
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