Tissue Factor (TF), the cellular receptor for the serine protease factor VIIa (FVIIa), besides the activation of the coagulation cascade, plays a major role in angiogenesis, tumour metastasis, inflammation, cell adhesion and cell migration. The signal pathways and the molecular mechanisms are however for the most part not yet fully researched. In this study it is shown that the binding of FVIIa to TF, depending on the cytoplasmatic domain of TF, leads to the activation of the mitogen-activated protein kinase (MAPK) p38. p38 activation was independent of the proteolytic activity of FVIIa. The results show for the first time, the exclusive receptor-function of TF during signal transduction. Simultaneously a TF-mediated increase in the migration can be seen. TF-mediated migration is dependent on the MAPK p38. TF can thus influence the migration via MAPK p38 independently of the proteolytic activity of FVIIa.
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Tissue Factor (TF), the cellular receptor for the serine protease factor VIIa (FVIIa), besides the activation of the coagulation cascade, plays a major role in angiogenesis, tumour metastasis, inflammation, cell adhesion and cell migration. The signal pathways and the molecular mechanisms are however for the most part not yet fully researched. In this study it is shown that the binding of FVIIa to TF, depending on the cytoplasmatic domain of TF, leads to the activation of the mitogen-activated p...
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