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Syk kinase-coupled C-type lectin receptors engage protein kinase C-δ to elicit Card9 adaptor-mediated innate immunity.
Immunity 36, 32-42 (2012)
C-type lectin receptors (CLRs) that couple with the kinase Syk are major pattern recognition receptors for the activation of innate immunity and host defense. CLRs recognize fungi and other forms of microbial or sterile danger, and they induce inflammatory responses through the adaptor protein Card9. The mechanisms relaying CLR proximal signals to the core Card9 module are unknown. Here we demonstrated that protein kinase C-δ (PKCδ) was activated upon Dectin-1-Syk signaling, mediated phosphorylation of Card9 at Thr231, and was responsible for Card9-Bcl10 complex assembly and canonical NF-κB control. Prkcd(-/-) dendritic cells, but not those lacking PKCα, PKCβ, or PKCθ, were defective in innate responses to Dectin-1, Dectin-2, or Mincle stimulation. Moreover, Candida albicans-induced cytokine production was blocked in Prkcd(-/-) cells, and Prkcd(-/-) mice were highly susceptible to fungal infection. Thus, PKCδ is an essential link between Syk activation and Card9 signaling for CLR-mediated innate immunity and host protection.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Pattern-recognition receptor; Fungal-infections; Candida-albicans; Tyrosine kinase; T-lymphocytes; Host-Defense; Cells; Activation; Dectin-2; Responses
ISSN (print) / ISBN
1074-7613
e-ISSN
1097-4180
Zeitschrift
Immunity
Quellenangaben
Band: 36,
Heft: 1,
Seiten: 32-42
Verlag
Cell Press
Verlagsort
Cambridge, Mass.
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed