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Signal transduction mechanisms of CD137 ligand in human monocytes

机译:人单核细胞中CD137配体的信号转导机制

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Bidirectional signalling, i.e. simultaneous signalling through a receptor as well as its cell surface-bound ligand has been identified for several members of the TNF and TNF receptor family members. Reverse signalling through the ligands offers the advantage of an immediate feed-back and a more precise fine tuning of biological responses. Little is known about the molecular nature of reverse signalling through the ligands. CD137 ligand, member of the TNT family is expressed on monocytes and induces activation, migration, prolongation of survival and proliferation of monocytes. Here we show that reverse signalling by CD137 ligand is mediated by protein tyrosine kinases, p38 mitogen activated protein kinase (MAPK), extracellular signal-regulated kinase (ERK)1,2, MAP/ERK kinase (MEK), Phosphoinositide-3-kinase (P13-K) and protein kinase A (PKA) but not by protein kinase C (PKC). This study also shows that reverse signalling relies on the same signal transduction molecules as signalling through classical receptors and is in its nature not different from it. (c) 2007 Elsevier Inc. All rights reserved.
机译:已经针对TNF和TNF受体家族成员的几个成员鉴定了双向信号传递,即通过受体及其细胞表面结合配体的同时信号传递。通过配体的反向信号传导具有立即反馈和更精确地微调生物反应的优势。通过配体进行反向信号传递的分子性质知之甚少。 TNT家族成员CD137配体在单核细胞上表达,并诱导单核细胞的活化,迁移,存活延长和增殖。在这里我们显示CD137配体的反向信号传导是由蛋白酪氨酸激酶,p38丝裂原活化蛋白激酶(MAPK),细胞外信号调节激酶(ERK)1,2,MAP / ERK激酶(MEK),磷酸肌醇-3-激酶介导的(P13-K)和蛋白激酶A(PKA),而不是蛋白激酶C(PKC)。这项研究还表明,反向信号转导与通过经典受体的信号转导依赖于相同的信号转导分子,并且本质上与之不同。 (c)2007 Elsevier Inc.保留所有权利。

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