首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Adapter proteins SLP-76 and BLNK both are expressed by murine macrophages and are linked to signaling via Fcγ receptors I and II/Ill
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Adapter proteins SLP-76 and BLNK both are expressed by murine macrophages and are linked to signaling via Fcγ receptors I and II/Ill

机译:衔接蛋白SLP-76和BLNK均由鼠巨噬细胞表达,并通过Fcγ受体I和II / III与信号转导相连

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The SLP-76 (Src homology 2 domain-containing leukocyte protein of 76 kDa) adapter protein is expressed in T cells and myeloid cells. whereas its homologue BLNK (B cell linker protein) is expressed in B cells. SLP-76 and BLNK link immunoreceptor tyrosine-based activation motif-containing receptors to signaling molecules that include phospholipase C-/100 mitogen-activated protein kinases. and the GTPases Ras and Rho. SLP-76 plays a critical role in T cell receptor, FcERI and gpVl collagen receptor signaling. and partici- pates in signaling via FcyR and killer cell inhibitory receptors. BLNK plays a critical role in B cell receptor signaling. We show that murine bone marrow-derived macrophages express both SLP-76 and BLNK. Selective ligation of FcyRl and FcyRll/lll resulted in tyrosine phosphorylation of both SLP-76 and BLNK. SLP-76--l-- bone marrow-derived macrophages' display FcTR-mediated tyrosine phosphorylation of Syk, phospholipase C-y2. and extracellular signaI regulated kinases 1 and 2, and normal FcyR-dependent phagocytosis. These data suggest that both SLP-76 and BLNK are coupled to FcyR signaling in murine macrophages.
机译:SLP-76(76 kDa的含有Src同源2域的白细胞蛋白)衔接蛋白在T细胞和髓样细胞中表达。而其同源物BLNK(B细胞接头蛋白)在B细胞中表达。 SLP-76和BLNK将基于免疫受体酪氨酸的活化基序受体连接到信号分子,该信号分子包括磷脂酶C- / 100丝裂原活化的蛋白激酶。以及GTPases Ras和Rho。 SLP-76在T细胞受体,FcERI和gpV1胶原受体信号传导中起关键作用。并通过FcyR和杀伤细胞抑制受体参与信号转导。 BLNK在B细胞受体信号传导中起关键作用。我们显示,鼠骨髓来源的巨噬细胞表达SLP-76和BLNK。 FcyR1和FcγR11/ III的选择性连接导致SLP-76和BLNK两者的酪氨酸磷酸化。 SLP-76--l--源自骨髓的巨噬细胞显示FcTR介导的Syk酪氨酸磷酸化,磷脂酶C-y2。和细胞外信号调节激酶1和2,以及正常的FcyR依赖性吞噬作用。这些数据表明,SLP-76和BLNK均与鼠巨噬细胞中的FcyR信号传导偶联。

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