Epidermal Growth Factor (EGF) Autocrine Activation of Human Platelets Promotes EGF Receptor-Dependent Oral Squamous Cell Carcinoma Invasion, Migration, and Epithelial Mesenchymal Transition

The Journal of Immunology : Official Journal of the American Association of Immunologists
Rui ChenThomas M McIntyre

Abstract

Activated platelets release functional, high m.w. epidermal growth factor (HMW-EGF). In this study, we show platelets also express epidermal growth factor (EGF) receptor (EGFR) protein, but not ErbB2 or ErbB4 coreceptors, and so might respond to HMW-EGF. We found HMW-EGF stimulated platelet EGFR autophosphorylation, PI3 kinase-dependent AKT phosphorylation, and a Ca2+ transient that were blocked by EGFR tyrosine kinase inhibition. Strong (thrombin) and weak (ADP, platelet-activating factor) G protein-coupled receptor agonists and non-G protein-coupled receptor collagen recruited EGFR tyrosine kinase activity that contributed to platelet activation because EGFR kinase inhibition reduced signal transduction and aggregation induced by each agonist. EGF stimulated ex vivo adhesion of platelets to collagen-coated microfluidic channels, whereas systemic EGF injection increased initial platelet deposition in FeCl3-damaged murine carotid arteries. EGFR signaling contributes to oral squamous cell carcinoma (OSCC) tumorigenesis, but the source of its ligand is not established. We find individual platelets were intercalated within OSCC tumors. A portion of these platelets expressed stimulation-dependent Bcl-3 and IL-1β and so had been act...Continue Reading

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Citations

Jun 20, 2019·International Journal of Molecular Sciences·Pierre HaenLaurence Panicot-Dubois
Aug 31, 2019·Environmental and Molecular Mutagenesis·Kelly L HarrisBarbara L Parsons
Mar 29, 2020·Laboratory Investigation; a Journal of Technical Methods and Pathology·Rong JiangTingting Yu
Mar 3, 2020·Frontiers in Immunology·Stefanie MaurerKorbinian N Kropp
Feb 6, 2021·Environmental Toxicology and Pharmacology·Rong JiangJie Chao
Feb 20, 2021·Journal of Hepatocellular Carcinoma·Tingting ShiTsutomu Masaki
May 11, 2021·Clinical and Applied Thrombosis/hemostasis : Official Journal of the International Academy of Clinical and Applied Thrombosis/Hemostasis·Emily BontekoeAmir Darki

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