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首页> 外文期刊>Cytokine >Transforming growth factor-β1 impairs lymph node homing of dendritic cells by downregulating C-type lectin receptor-2 expression
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Transforming growth factor-β1 impairs lymph node homing of dendritic cells by downregulating C-type lectin receptor-2 expression

机译：通过下调C型凝集素受体-2表达，转化生长因子-β1损害树突细胞的淋巴结归巢

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摘要

Trafficking of dendritic cells (DCs) from peripheral tissues to draining lymph nodes is a prerequisite for induction of adaptive immunity. An immunosuppressive cytokine transforming growth factor (TGF)-β1, however, inhibits migration of DCs by downregulating the expression of chemokine receptor CCR-7. Whether TGF-β1 engages any other receptor to mediate this inhibitory effect is currently unknown. In this article, we report that TGF-β1 attenuated the lymph node homing ability of mouse DCs by reducing C-type lectin receptor-2 (CLEC-2) expression. Notably, TGF-β1 inhibited CLEC-2 expression in DCs via c-Src. DCs silenced for c-Src were resistant to TGF-β1-induced inhibition of CLEC-2 expression. Furthermore, silencing of c-Src substantially improved the lymph node homing capacity of TGF-β1-treated DCs by restoring CLEC-2 expression. These results document a critical role for c-Src and CLEC-2 in TGF-β1-mediated impairment of DC migration and define a previously unknown mechanism by which TGF-β1 attenuates the lymph node homing ability of DCs.
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