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Related Experiment Videos

The complement system in xenotransplantation.

A P Dalmasso1

  • 1Department of Laboratory Medicine and Pathology, Veterans Affairs Medical Center, Minneapolis, MN 55417.

Immunopharmacology
|September 1, 1992
PubMed
Summary
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Hyperacute rejection, a major hurdle in xenotransplantation, involves complement activation. Inhibiting complement activation is a promising strategy to prevent this immune response and enable organ transplantation.

Area of Science:

  • Immunology
  • Transplantation Biology
  • Vascular Biology

Background:

  • Xenotransplantation faces immediate rejection due to natural immunity.
  • Complement (C) activation is central to hyperacute rejection of xenografts.
  • Natural antibodies and endothelial cells trigger C activation.

Purpose of the Study:

  • To review the role of complement in hyperacute rejection.
  • To explore strategies for inhibiting C activation in xenotransplantation.

Main Methods:

  • Review of recent findings on complement's role.
  • Analysis of evidence for C inhibition strategies.

Main Results:

  • Complement activation leads to endothelial damage and fibrin deposition.

Related Experiment Videos

  • C activation fragments and natural antibodies initiate rejection.
  • Inhibition of C activation is a key therapeutic target.

    • Conclusions:

    • Complement plays a critical pathophysiological role in xenograft hyperacute rejection.
    • Inhibiting complement activation is a crucial approach to prevent hyperacute rejection.
    • This strategy may overcome a major barrier in xenotransplantation.