SSC Subcommittee on Factor XI and the Contact System

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This Subcommittee is focused on basic research, physiology, diagnostics and pharmacology of blood coagulation factor XI and the plasma contact system.

Definition:

When blood is exposed to surfaces, a series of proteolytic reactions are initiated that lead to formation of a blood clot. The surface-mediated reactions, collectively referred to as contact activation reactions, involve activation of the plasma serine protease zymogens factor XII, factor XI, and plasma prekallikrein and cleavage of high-molecular-weight-kininogen to release the inflammatory mediator bradykinin. In addition to blood coagulation, contact activation initiates several important plasma host-defense systems in vitro, including kinin generation, fibrinolysis, and complement activation.

If you are interested in the subcommittee and want to follow its activity, please click "join community."

Mandate:

  • To understand modes of regulation and structure-function correlation for these proteins
  • To understand associated reactions such as those of the kallikrein-kinin and complement systems
  • To understand the implications of FXI And the contact phase system for Immunology and Vascular Biology

If you are a member of the Society and would like to know how to participate in the work of this group, please join the group to receive updates on activity or submit an Expression of Interest Form to the Chairman or any of the Co-Chairmen. We would be pleased to learn of your interest.

Leadership

  • Chair - Helen Philippou
  • Co-chair - Ophira Salomon
  • Co-chair - Gillian Gidley
  • Co-chair - Thomas Renne
  • Co-chair - Aizhen Yang
  • Co-chair - Michael Pfeffer
  • Co-chair - Philip Christian Wenzel
  • Co-chair - Evi Stavrou
  • Co-chair - Jonas Emsley
  • Co-chair - Sandra Konrath

Projects:

Official Communications:

Factor XI Links and Resources:

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Announcements

  • Re: Your Participation in a Standardization of Laboratory Assays Survey is Requested

    Greetings, esteemed doctors and scientists. Your participation in the Standardization of Laboratory Assays to Measure FXII/FXIIa survey is being requested.

    This survey aims to collect information across SSC members on FXII methodology with the goal of optimizing and streamlining the best practices to measure FXII zymogen and protease levels. The survey's specific aims include:

    • Create a database to evaluate current practice in research involving FXII among researchers in the field of thrombosis and hemostasis.
    • Conduct exploratory and validation assays to harmonize FXII measurements.
    • Establish consensus guidance on the design and execution of laboratory tests to measure FXII antigen and activity.

    Your participation is greatly appreciated. 

    You may open the survey in your web browser by clicking the link below:
    SSC Project - Standardization of laboratory assays to measure FXII antigen and activity.

    If the link above does not work, try copying the link below into your web browser:
    https://redcap.isth.org/surveys/?s=FRJF7L37F7KDXPR7

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Univ. of Leeds
United Kingdom