|
Tespa1 is involved in late thymocyte development through the regulation of TCR-mediated signaling! h; W; g2 t& S z4 t
8 n6 c% J* ~# h
Di Wang, Mingzhu Zheng, Lei Lei, Jian Ji, Yunliang Yao, Yuanjun Qiu, Lie Ma, Jun Lou, Chuan Ouyang, Xue Zhang, Yuewei He, Jun Chi, Lie Wang, Ying Kuang, Jianli Wang, Xuetao Cao & Linrong Lu
0 b% E/ t2 W8 J; z* A' F& H& r% j3 g% Y8 U/ ?9 e/ `' k" Q
Signaling via the T cell antigen receptor (TCR) during the CD4+CD8+ double-positive developmental stage determines thymocyte selection and lineage commitment. Here we describe a previously uncharacterized T cell–expressed protein, Tespa1, with critical functions during the positive selection of thymocytes. Tespa1−/− mice had fewer mature thymic CD4+ and CD8+ T cells, which reflected impaired thymocyte development. Tespa1 associated with the TCR signaling components PLC-γ1 and Grb2, and Tespa1 deficiency resulted in attenuated TCR signaling, as reflected by defective activation of the Erk–AP-1 and Ca2+-NFAT pathways. Our findings demonstrate that Tespa1 is a component of the TCR signalosome and is essential for T cell selection and maturation through the regulation of TCR signaling during T cell development.
, H5 Q! w/ N3 A5 W0 G- q4 N8 u% r1 v0 Q
鲁教授又出好文章了。 |
|