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Related Experiment Videos

Progress in xenotransplantation.

E Cozzi1, S Masroor, B Soin

  • 1Imutran Ltd., Cambridge, UK.

Clinical Nephrology
|May 16, 2000
PubMed
Summary
This summary is machine-generated.

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Xenotransplantation (XT) using genetically modified pigs expressing human decay-accelerating factor (hDAF) overcomes hyperacute rejection in primates. Further research is needed to address acute vascular rejection for long-term organ survival.

Area of Science:

  • Immunology
  • Transplantation Biology
  • Genetic Engineering

Background:

  • Xenotransplantation (XT) offers a solution to human organ shortages.
  • Porcine organs face hyperacute rejection (HR) due to anti-Gal antibodies and endothelial cell (EC) activation.
  • Genetically modified pigs expressing human decay-accelerating factor (hDAF) mitigate HR.

Purpose of the Study:

  • To evaluate strategies for overcoming acute vascular rejection (AVR) in pig-to-primate xenotransplantation.
  • To investigate methods to prevent EC activation and preserve antithrombotic properties.
  • To understand the role of cellular immune responses in xenograft survival.

Main Methods:

  • Utilizing genetically modified pigs expressing hDAF to reduce HR.
  • Investigating immunosuppressive agents targeting humoral responses.

Related Experiment Videos

  • Exploring inhibition of NF-kappaB and targeting adhesion molecules to prevent EC activation.
  • Examining platelet inhibitors and antibodies against adhesion molecules.

    • Main Results:

    • Organs from hDAF transgenic pigs survive in primates for up to 12 weeks.
    • Hyperacute rejection (HR) is overcome by hDAF expression.
    • Acute vascular rejection (AVR) remains a significant barrier to long-term graft survival.

    Conclusions:

    • hDAF transgenic pigs significantly improve xenograft survival by preventing HR.
    • Overcoming AVR is critical for achieving long-term success in pig-to-primate XT.
    • Further research into cellular immunity and tolerance induction is essential for clinical XT.