formyl peptide receptor 1 modulates endothelial cell functions by nadph oxidase-dependent vegfr2 transactivation

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ID: 165200
2018
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Abstract
In the vasculature, NADPH oxidase is the main contributor of reactive oxygen species (ROS) which play a key role in endothelial signalling and functions. We demonstrate that ECV304 cells express p47phox, p67phox, and p22phox subunits of NADPH oxidase, as well as formyl peptide receptors 1 and 3 (FPR1/3), which are members of the GPCR family. By RT-PCR, we also detected Flt-1 and Flk-1/KDR in these cells. Stimulation of FPR1 by N-fMLP induces p47phox phosphorylation, which is the crucial event for NADPH oxidase-dependent superoxide production. Transphosphorylation of RTKs by GPCRs is a biological mechanism through which the information exchange is amplified throughout the cell. ROS act as signalling intermediates in the transactivation mechanism. We show that N-fMLP stimulation induces the phosphorylation of cytosolic Y951, Y996, and Y1175 residues of VEGFR2, which constitute the anchoring sites for signalling molecules. These, in turn, activate PI3K/Akt and PLC-γ1/PKC intracellular pathways. FPR1-induced ROS production plays a critical role in this cross-talk mechanism. In fact, inhibition of FPR1 and/or NADPH oxidase functions prevents VEGFR2 transactivation and the triggering of the downstream signalling cascades. N-fMLP stimulation also ameliorates cellular migration and capillary-like network formation ability of ECV304 cells.
Reference Key
cattaneo2018oxidativeformyl Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Fabio Cattaneo, Martina Castaldo, Melania Parisi, Raffaella Faraonio, Gabriella Esposito, Rosario Ammendola
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Journal journal of aoac international
Year 2018
DOI
10.1155/2018/2609847
URL
http://dx.doi.org/10.1155/2018/2609847
Keywords
cytology

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