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Updated: Mar 11, 2026

Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation
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Processing of Factor XII during Inflammatory Reactions.

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The contact system, involving factor XII (FXII), plays a key role in inflammation, not coagulation. New models show FXII fragments activate inflammatory pathways, impacting immune responses.

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Area of Science:

  • Biochemistry
  • Immunology
  • Hematology

Background:

  • The plasma contact system, historically linked to coagulation, is increasingly recognized for its role in inflammatory conditions.
  • Factor XII (FXII) is a key component, but its procoagulant activity is minimal in inflammation, suggesting alternative functions.
  • Immune cells and pathogens interact with contact factors, influencing inflammatory processes.

Conclusions:

  • The contact system, particularly FXII, is a crucial mediator of inflammation rather than coagulation.
  • Enzymatic crosstalk between inflammatory cells and the plasma contact system drives inflammatory responses.
  • FXII fragments generated during inflammation are key activators of pro-inflammatory pathways.