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Tissue factor around dermal vessels has bound factor VII in the absence of injury.

Publication ,  Journal Article
Hoffman, M; Colina, CM; McDonald, AG; Arepally, GM; Pedersen, L; Monroe, DM
Published in: J Thromb Haemost
July 2007

BACKGROUND: 'Idling' or ongoing low-level activity of the tissue factor (TF) pathway is a postulated mechanism by which the coagulation process can become active without a lag period at sites of injury. OBJECTIVE: To determine whether TF around cutaneous vessels has bound factor VIIa in the absence of injury, and thus could participate in the idling process. METHODS: Immunostaining of mouse skin with antibodies against a 15-residue peptide from the sequence of mouse TF, and against the whole extracellular portion of TF. RESULTS: The whole TF antibody recognized TF in squamous epithelium and around vessels in the dermis. By contrast, the monospecific antibody only recognized TF in the squamous epithelium, but not around vessels. We also found that biotinylated, active site-inhibited FVIIa (FVIIai) bound to tissue sections in the same areas in which TF was recognized by the monospecific antibody (squamous epithelium), but did not bind around vessels. Molecular modeling revealed that FVIIa and FX binding to TF masked a significant part of the surface of the target peptide. CONCLUSIONS: In the aggregate, these data are most consistent with the interpretation that TF in perivascular sites has bound FVIIa, even in the absence of any injury. The presence of endogenously bound FVIIa prevents the subsequent binding of the monospecific antibody or exogenous FVIIai to perivascular TF.

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Published In

J Thromb Haemost

DOI

ISSN

1538-7933

Publication Date

July 2007

Volume

5

Issue

7

Start / End Page

1403 / 1408

Location

England

Related Subject Headings

  • Tissue Distribution
  • Thromboplastin
  • Skin
  • Protein Binding
  • Multiprotein Complexes
  • Mice, Inbred C57BL
  • Mice
  • Immunohistochemistry
  • Factor VIIa
  • Factor VII
 

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Hoffman, M., Colina, C. M., McDonald, A. G., Arepally, G. M., Pedersen, L., & Monroe, D. M. (2007). Tissue factor around dermal vessels has bound factor VII in the absence of injury. J Thromb Haemost, 5(7), 1403–1408. https://doi.org/10.1111/j.1538-7836.2007.02576.x
Hoffman, M., C. M. Colina, A. G. McDonald, G. M. Arepally, L. Pedersen, and D. M. Monroe. “Tissue factor around dermal vessels has bound factor VII in the absence of injury.J Thromb Haemost 5, no. 7 (July 2007): 1403–8. https://doi.org/10.1111/j.1538-7836.2007.02576.x.
Hoffman M, Colina CM, McDonald AG, Arepally GM, Pedersen L, Monroe DM. Tissue factor around dermal vessels has bound factor VII in the absence of injury. J Thromb Haemost. 2007 Jul;5(7):1403–8.
Hoffman, M., et al. “Tissue factor around dermal vessels has bound factor VII in the absence of injury.J Thromb Haemost, vol. 5, no. 7, July 2007, pp. 1403–08. Pubmed, doi:10.1111/j.1538-7836.2007.02576.x.
Hoffman M, Colina CM, McDonald AG, Arepally GM, Pedersen L, Monroe DM. Tissue factor around dermal vessels has bound factor VII in the absence of injury. J Thromb Haemost. 2007 Jul;5(7):1403–1408.
Journal cover image

Published In

J Thromb Haemost

DOI

ISSN

1538-7933

Publication Date

July 2007

Volume

5

Issue

7

Start / End Page

1403 / 1408

Location

England

Related Subject Headings

  • Tissue Distribution
  • Thromboplastin
  • Skin
  • Protein Binding
  • Multiprotein Complexes
  • Mice, Inbred C57BL
  • Mice
  • Immunohistochemistry
  • Factor VIIa
  • Factor VII