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

Deng, Zihou; Ma, Shixin; Zhou, Hao; Zang, Aiping; Fang, Yiyuan; Li, Tiantian; Shi, Huanjing; Liu, Mei; Du, Min; Taylor, Patricia R; Zhu, Helen He; Chen, Jiangye; Meng, Guangxun; Li, Fubin; Chen, Changbin; Zhang, Yan; Jia, Xin-Ming; Lin, Xin; Zhang, Xiaoming; Pearlman, Eric; Li, Xiaoxia; Feng, Gen-Sheng; Xiao, Hui.
Nat Immunol; 16(6): 642-52, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25915733
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 1ß (IL-1ß), 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.
Selo DaSilva