Tyrosine phosphatase SHP-2 mediates C-type lectin receptor–induced activation of the kinase Syk and anti-fungal TH17 responses

Z Deng, S Ma, H Zhou, A Zang, Y Fang, T Li, H Shi… - Nature …, 2015 - nature.com
Z Deng, S Ma, H Zhou, A Zang, Y Fang, T Li, H Shi, M Liu, M Du, PR Taylor, HH Zhu, J Chen…
Nature immunology, 2015nature.com
Fungal infection stimulates the canonical C-type lectin receptor (CLR) signaling pathway via
activation of the tyrosine kinase Syk. Here we identify a crucial role for the tyrosine
phosphatase SHP-2 in mediating CLR-induced activation of Syk. Ablation of the gene
encoding SHP-2 (Ptpn11; called'Shp-2'here) in dendritic cells (DCs) and macrophages
impaired Syk-mediated signaling and abrogated the expression of genes encoding pro-
inflammatory molecules following fungal stimulation. Mechanistically, SHP-2 operated as a …
Abstract
Fungal infection stimulates the canonical C-type lectin receptor (CLR) signaling pathway via activation of the tyrosine kinase Syk. Here we identify a crucial role for the tyrosine phosphatase SHP-2 in mediating CLR-induced activation of Syk. Ablation of the gene encoding SHP-2 (Ptpn11; called 'Shp-2' here) in dendritic cells (DCs) and macrophages impaired Syk-mediated signaling and abrogated the expression of genes encoding pro-inflammatory molecules following fungal stimulation. Mechanistically, SHP-2 operated as a scaffold, facilitating the recruitment of Syk to the CLR dectin-1 or the adaptor FcRγ, through its N-SH2 domain and a previously unrecognized carboxy-terminal immunoreceptor tyrosine-based activation motif (ITAM). We found that DC-derived SHP-2 was crucial for the induction of interleukin 1β (IL-1β), IL-6 and IL-23 and anti-fungal responses of the TH17 subset of helper T cells in controlling infection with Candida albicans. Together our data reveal a mechanism by which SHP-2 mediates the activation of Syk in response to fungal infection.
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