The antagonistic roles of PDGF and integrin αvβ3 in regulating ROS production at focal adhesions.

The antagonistic roles of PDGF and integrin αvβ3 in regulating ROS production at focal adhesions.
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DOI:
10.1016/j.biomaterials.2013.01.092
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发表时间:
2013-05
期刊:
影响因子:
14
通讯作者:
Wang, Yingxiao
Wang, Yingxiao
中科院分区:
工程技术1区
文献类型:
--
作者:
Lin, Li-Jung;Grimme, Jill M.;Sun, Jie;Lu, Shaoying;Gai, Lisa;Cropek, Donald M.;Wang, Yingxiao

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活性氧(ROS)已被证明在调节各种细胞功能中起着至关重要的作用,例如在生长因子刺激下的粘着斑(FA)动力学和细胞迁移。然而,目前尚不清楚ROS如何在亚细胞FA位点调节以影响细胞迁移。我们已经开发了一种生物传感器,能够监测活性氧生产在FA网站在活细胞中具有高灵敏度和特异性,利用荧光共振能量转移(FRET)。结果表明,血小板衍生生长因子(PDGF)可以诱导活性氧的产生在FA网站,这是由Rac1激活介导。相反,整合素,特别是整合素αvβ3,抑制这种局部ROS的产生。RhoA活性可以介导整合素在调节ROS产生中的这种抑制作用。因此,PDGF和整合素αvβ3协同拮抗FA位点的ROS产生,调节细胞粘附和迁移。
Reactive oxygen species (ROS) have been shown to play crucial roles in regulating various cellular functions, e.g. focal adhesion (FA) dynamics and cell migration upon growth factor stimulation. However, it is not clear how ROS are regulated at subcellular FA sites to impact cell migration. We have developed a biosensor capable of monitoring ROS production at FA sites in live cells with high sensitivity and specificity, utilizing fluorescence resonance energy transfer (FRET). The results revealed that platelet derived growth factor (PDGF) can induce ROS production at FA sites, which is mediated by Rac1 activation. In contrast, integrins, specifically integrin αvβ3, inhibits this local ROS production. The RhoA activity can mediate this inhibitory role of integrins in regulating ROS production. Therefore, PDGF and integrin αvβ3 coordinate to have an antagonistic effect in the ROS production at FA sites to regulate cell adhesion and migration.
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