Tissue factor encryption

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228 Scopus citations


Tissue factor (TF) encryption is the post-translational suppression of TF procoagulant activity (PCA) on the cell surface. There is emerging evidence of encrypted TF in normal blood associated with monocytes and platelets. Expression of this latent TF PCA during the propagation phase of blood coagulation may contribute to hemostasis. One pathway leading to the decryption of TF PCA begins with an increase in cytosolic calcium. A large calcium influx triggers both the exposure of phosphatidylserine and the expression of TF PCA on cell surfaces. The connections between these events are reviewed along with evidence that lipid raft association may also contribute to TF encryption. The last step in the decryption of TF PCA is the proteolytic activation of zymogen factor VII. This event may be a key to understanding the different roles of intravascular and extravascular TF in the process of blood coagulation.

Original languageEnglish (US)
Pages (from-to)456-461
Number of pages6
JournalArteriosclerosis, thrombosis, and vascular biology
Issue number3
StatePublished - Mar 2006


  • Coagulation
  • Cytosolic calcium
  • Factor VII
  • Phosphatidylserine
  • Tissue factor


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