e_re177( EMT ):
The gene expressions of MMP-1, MMP-3, and MMP-9 and gelatinolytic activity of MMP-9 were significantly increased in high ETS-1 expression cells.
Low ETS-1 expression cells could not spread on a vitronectin substratum, and the phosphorylation of focal adhesion kinase was markedly impaired because of the reduced expression of integrin b3
Integrin aVb3 plays an important role in angiogenesis. Bblocking of the binding of endothelial integrin aVb3 inhibits angiogenesis and forces neovascular ECs into apoptosis (Brooks et al., 1994a,b).
PTP4A3 is implicated in cell adhesion and the regulation of focal adhesion components including integrin beta-1, Src, paxillin and p130Cas
Similarly, PTP4A3 promotes cell invasion by increasing MMP2 activity and decreasing the expression of the MMP inhibitor, TIMP2.
PTP4A3 is also involved in EMT: PTP4A3 overexpression in colorectal carcinoma cells downregulates epithelial markers (E-cadherin, plakoglobin, and integrin beta-3) and upregulates expression of mesenchymal markers (fibronectin and snail1).
Src-mediated phosphorylation of PTP4A3 Is required for Rho activation, motility and invasion promoted by PTP4A3.
In compartment: Nucleus
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