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Mechanisms of Participation of the Urokinase Receptor in Directed Axonal Growth
Molecular Biology ( IF 1.2 ) Pub Date : 2020-02-25 , DOI: 10.1134/s0026893320010094
P. S. Klimovich , E. V. Semina

Abstract

The degradation of the extracellular matrix plays an important role in the processes of morphogenesis, angio- and neurogenesis, wound healing, inflammation, carcinogenesis and others. The urokinase receptor uPAR is an important participant in processes that regulate extracellular proteolysis, cell adhesion to the extracellular matrix, cell migration along the chemokine gradient, proliferation and survival involving growth factor receptors. The presence of the GPI anchor and the absence of transmembrane and cytoplasmic domains in uPAR promote involvement of membrane partners for the realization of uPAR signal effects. In some studies, involvement of the fMLP chemokine receptor FPRL in the regulation of uPAR-dependent directed migration has been shown. Moreover, the migration of neural progenitors and their maturation into neurons during the formation of brain structures are regulated by chemokine receptors. Despite the data on the role of uPAR in the processes of morphogenesis, little is known about the interactions between uPAR and chemokine receptors in guidance processes during nerve growth and regeneration. In the present work, it was shown for the first time that the soluble form of uPAR (suPAR) regulates the trajectory of axon outgrowth, and this effect does not depend on the presence of urokinase. It was also shown that regulation of the directed axon growth is based on the interaction of suPAR with the chemokine receptor FPRL1. These data show new mechanisms for the participation of the urokinase system in the regulation of axon guidance.


中文翻译:

尿激酶受体参与定向轴突生长的机制

摘要

细胞外基质的降解在形态发生,血管和神经发生,伤口愈合,炎症,癌变等过程中起重要作用。尿激酶受体uPAR在调节细胞外蛋白水解,细胞粘附于细胞外基质,沿趋化因子梯度的细胞迁移,涉及生长因子受体的增殖和存活的过程中是重要的参与者。uPAR中GPI锚点的存在以及跨膜和胞质域的缺失促进了膜伴侣参与uPAR信号效应的实现。在一些研究中,已经表明fMLP趋化因子受体FPRL参与uPAR依赖性定向迁移的调节。此外,在神经结构形成过程中神经祖细胞的迁移及其成熟为神经元受趋化因子受体调节。尽管有关于uPAR在形态发生过程中的作用的数据,但对于神经生长和再生过程中uPAR和趋化因子受体在指导过程中的相互作用知之甚少。在目前的工作中,首次显示出可溶形式的uPAR(suPAR)调节轴突生长的轨迹,这种作用并不取决于尿激酶的存在。还显示出定向轴突生长的调节是基于suPAR与趋化因子受体FPRL1的相互作用。这些数据显示了尿激酶系统参与轴突导向调节的新机制。尽管有关于uPAR在形态发生过程中的作用的数据,但对于神经生长和再生过程中uPAR和趋化因子受体在指导过程中的相互作用知之甚少。在目前的工作中,首次显示出可溶形式的uPAR(suPAR)调节轴突生长的轨迹,这种作用并不取决于尿激酶的存在。还显示出定向轴突生长的调节是基于suPAR与趋化因子受体FPRL1的相互作用。这些数据显示了尿激酶系统参与轴突导向调节的新机制。尽管有关于uPAR在形态发生过程中的作用的数据,但对于神经生长和再生过程中uPAR和趋化因子受体在指导过程中的相互作用知之甚少。在目前的工作中,首次显示出可溶形式的uPAR(suPAR)调节轴突生长的轨迹,这种作用并不取决于尿激酶的存在。还显示出定向轴突生长的调节是基于suPAR与趋化因子受体FPRL1的相互作用。这些数据显示了尿激酶系统参与轴突导向调节的新机制。在目前的工作中,首次显示出可溶形式的uPAR(suPAR)调节轴突生长的轨迹,这种作用并不取决于尿激酶的存在。还显示出定向轴突生长的调节是基于suPAR与趋化因子受体FPRL1的相互作用。这些数据显示了尿激酶系统参与轴突导向调节的新机制。在目前的工作中,首次显示出可溶形式的uPAR(suPAR)调节轴突生长的轨迹,这种作用并不取决于尿激酶的存在。还显示出定向轴突生长的调节是基于suPAR与趋化因子受体FPRL1的相互作用。这些数据显示了尿激酶系统参与轴突导向调节的新机制。
更新日期:2020-02-25
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