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CCETS Basic Science Lecture. Transplantation tolerance

D H Sachs1

  • 1Harvard Medical School, Boston, Massachusetts.

The Annals of Thoracic Surgery
|December 1, 1993
PubMed
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Researchers are developing mixed chimerism to induce specific tolerance in transplantation, aiming to reduce complications and increase organ availability through xenogeneic strategies.

Area of Science:

  • Transplantation immunology
  • Regenerative medicine

Background:

  • Transplantation is limited by treatment complications and donor organ shortages.
  • Nonspecific immunosuppression causes significant side effects.

Purpose of the Study:

  • To review laboratory progress in overcoming transplantation limitations.
  • To explore mixed chimerism for inducing specific tolerance.
  • To investigate xenogeneic transplantation for organ availability.

Main Methods:

  • Utilizing mixed chimerism by infusing donor bone marrow elements.
  • Employing nonmyeloablative preparative regimens.
  • Testing regimens in allogeneic murine and xenogeneic rat-to-mouse models.
  • Extending studies to discordant pig-to-monkey xenograft models.

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Main Results:

  • Established a nonmyeloablative regimen for mixed chimerism and tolerance in murine and rat-to-mouse models.
  • Current research focuses on applying this to pig-to-monkey xenografts.

Conclusions:

  • Mixed chimerism offers a pathway to specific transplantation tolerance, reducing reliance on immunosuppressants.
  • Successful xenogeneic transplantation could provide an abundant source of organs.