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Related Experiment Videos

Complement C2 receptor inhibitor trispanning: a novel human complement inhibitory receptor.

Jameel M Inal1, Kwok-Min Hui, Sylvie Miot

  • 1Immunonephrology Lab 414, Department of Research, University Hospital Basel, Hebelstrasse 20, 4031 Basel, Switzerland. jameel.inal@unibas.ch

Journal of Immunology (Baltimore, Md. : 1950)
|December 22, 2004
PubMed
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We discovered complement C2 receptor inhibitor trispanning (CRIT), a novel regulator of the complement system. CRIT protects cells from complement-mediated damage by blocking C2 cleavage, preventing inflammation.

Area of Science:

  • Immunology
  • Molecular Biology

Background:

  • The complement system is crucial for innate immunity but requires strict regulation to prevent self-damage.
  • Existing regulators like C1 inhibitor control complement activation, but novel mechanisms are continually being discovered.

Purpose of the Study:

  • To identify and characterize novel regulators of the human complement system.
  • To elucidate the mechanism of action of complement C2 receptor inhibitor trispanning (CRIT).

Main Methods:

  • Described the novel receptor CRIT and its expression patterns.
  • Investigated the interaction between CRIT and complement component C2.
  • Utilized peptide inhibition and antibody blockade assays to assess CRIT function.

Main Results:

Related Experiment Videos

  • CRIT is a novel complement regulatory receptor expressed on hemopoietic cells and various tissues.
  • CRIT binds complement component C2, and its peptide form inhibits C3 convertase formation and inflammation.
  • Antibody blockade of CRIT reduced cytolysis inhibition, confirming its role in protecting autologous cells.

Conclusions:

  • CRIT is a novel complement regulator that protects host cells from complement-mediated damage.
  • CRIT represents a new target for therapeutic intervention in complement-mediated inflammatory diseases.