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Involvement of Mincle and Syk in the changes to innate immunity after ischemic stroke.


ABSTRACT: Accumulating evidence shows that post-ischemic inflammation originated by Toll-like receptors (TLR) plays critical roles in ischemic stroke. However, the functions of other innate immune receptors are poorly understood in cerebral ischemia. Macrophage-inducible C-type lectin, Mincle, is one of the innate immune receptor C-type lectin-like receptor (CLR) to response against dying cells. In the present study, we showed that Mincle, its ligand SAP130, and its downstream phospho-Syk/Syk were upregulated after ischemia, and that Mincle is expressed in immune and non-immune cells in the ischemic brains of mice and human. We treated mice with piceatannol, a Syk inhibitor, and consequently the infarct volume and swelling were suppressed by piceatannol. The levels of phospho-Syk, MMP9 and ICAM-1 were downregulated, and the level of Claudin5 was uplegurated in piceatannol-treated groups. These data indicate that innate immune system, such as Mincle and Syk plays a pivotal role in the pathogenesis after the ischemia and reperfusion.

SUBMITTER: Suzuki Y 

PROVIDER: S-EPMC3822396 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature

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Involvement of Mincle and Syk in the changes to innate immunity after ischemic stroke.

Suzuki Yukiya Y   Nakano Yusuke Y   Mishiro Keisuke K   Takagi Toshinori T   Tsuruma Kazuhiro K   Nakamura Mitsuhiro M   Yoshimura Shinichi S   Shimazawa Masamitsu M   Hara Hideaki H  

Scientific reports 20131111


Accumulating evidence shows that post-ischemic inflammation originated by Toll-like receptors (TLR) plays critical roles in ischemic stroke. However, the functions of other innate immune receptors are poorly understood in cerebral ischemia. Macrophage-inducible C-type lectin, Mincle, is one of the innate immune receptor C-type lectin-like receptor (CLR) to response against dying cells. In the present study, we showed that Mincle, its ligand SAP130, and its downstream phospho-Syk/Syk were upregul  ...[more]

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