Two-Chains Tissue Plasminogen Activator Unifies Met and NMDA Receptor Signalling to Control Neuronal Survival.

Two-Chains Tissue Plasminogen Activator Unifies Met and NMDA Receptor Signalling to Control Neuronal Survival.
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双链组织纤溶酶原激活剂统一Met和NMDA受体信号传导以控制神经元存活。

DOI:
10.3390/ijms222413483
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发表时间:
2021-12-15
影响因子:
5.6
通讯作者:
Vivien D
Vivien D
中科院分区:
生物学2区
文献类型:
--
作者:
Hedou E;Douceau S;Chevilley A;Varangot A;Thiebaut AM;Triniac H;Bardou I;Ali C;Maillasson M;Crepaldi T;Comoglio P;Lemarchand E;Agin V;Roussel BD;Vivien D

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组织型纤溶酶原激活物(tPA)在神经系统的发育和可塑性中起重要作用。在这里,我们证明了在神经元中,通过反对单链形式(sc-tPA),tPA的双链形式(tc-tPA)激活MET受体,导致N-甲基-d-天冬氨酸受体(NMDAR)的招募和含有GluN 2B亚基的NMDAR的内吞作用和蛋白酶体依赖性降解。因此,tc-tPA下调GluN 2B-NMDAR驱动的信号传导,这是一个被HGFR/MET阻断剂阻止并被其激动剂模拟的过程,导致神经元死亡的调节。因此,我们目前的研究揭示了tPA的一种新的作用机制,其双链形式介导MET和NMDAR的GluN 2B亚基之间的串扰,以控制神经元的存活。
Tissue-type plasminogen activator (tPA) plays roles in the development and the plasticity of the nervous system. Here, we demonstrate in neurons, that by opposition to the single chain form (sc-tPA), the two-chains form of tPA (tc-tPA) activates the MET receptor, leading to the recruitment of N-Methyl-d-Aspartate receptors (NMDARs) and to the endocytosis and proteasome-dependent degradation of NMDARs containing the GluN2B subunit. Accordingly, tc-tPA down-regulated GluN2B-NMDAR-driven signalling, a process prevented by blockers of HGFR/MET and mimicked by its agonists, leading to a modulation of neuronal death. Thus, our present study unmasks a new mechanism of action of tPA, with its two-chains form mediating a crosstalk between MET and the GluN2B subunit of NMDARs to control neuronal survival.
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