The antagonistic roles of PDGF and integrin alpha v beta 3 in regulating ROS production at focal adhesions

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...

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Bibliographic Details
Published in:Biomaterials 2013-05, Vol.34 (15), p.3807-3815
Main Authors: Lin, Li-Jung, Grimme, Jill M, Sun, Jie, Lu, Shaoying, Gai, Lisa, Cropek, Donald M, Wang, Yingxiao
Format: Article
Language:English
Subjects:
Adhesion
Biomedical materials
Energy transfer
Fretting
Growth factors
Migration
Monitoring
Stimulation
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Summary: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 alpha v beta 3, inhibits this local ROS production. The RhoA activity can mediate this inhibitory role of integrins in regulating ROS production. Therefore, PDGF and integrin alpha v beta 3 coordinate to have an antagonistic effect in the ROS production at FA sites to regulate cell adhesion and migration.
ISSN:0142-9612
DOI:10.1016/j.biomaterials.2013.01.092