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Related Experiment Videos

Inflammation, sepsis, and coagulation.

C T Esmon1, K Fukudome, T Mather

  • 1Oklahoma Medical Research Foundation Cardiovascular Biology Research, 825 N.E. 13th Street, Oklahoma City, Oklahoma 73104, USA. esmonc@omrf.ouhsc.edu

Haematologica
|April 6, 1999
PubMed
Summary
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Researchers identified a novel endothelial cell protein C receptor (EPCR) that regulates inflammation and coagulation. This discovery sheds light on the protein C pathway

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Immunology

Background:

  • Inflammation and coagulation are intricately linked, forming a cycle that can lead to vascular injury.
  • The protein C pathway is a key regulatory mechanism in this inflammation-coagulation cycle.
  • Existing knowledge on protein C pathway's anticoagulant function is more established than its role in regulating inflammation.

Purpose of the Study:

  • To identify novel receptors that modulate activated protein C (APC) specificity, similar to how thrombomodulin affects thrombin.
  • To elucidate the mechanisms by which the protein C pathway regulates inflammation and response to injury.

Main Methods:

  • Identification of endothelial cell protein C receptor (EPCR).
  • Determining the crystal structure of APC (Gla domain-deleted).

Related Experiment Videos

  • Assessing EPCR's effect on factor Va inactivation in solution.

    • Main Results:

    • The crystal structure of APC revealed a groove analogous to thrombin's anion binding exosite 1.
    • EPCR, like thrombomodulin, modulates specificity by blocking factor Va inactivation without affecting protease inhibitor interactions.
    • EPCR shares properties with thrombomodulin, including modulation by inflammatory cytokines.

    Conclusions:

    • EPCR is a novel receptor for the protein C system with functions analogous to thrombomodulin.
    • EPCR plays a role in regulating the inflammation-coagulation balance.
    • Further research is needed to identify the substrate for the APC-EPCR complex to fully understand its regulatory mechanisms.