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Updated: Jun 10, 2025
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A Porcine Heterotopic Heart Transplantation Protocol for Delivery of Therapeutics to a Cardiac Allograft
Published on: February 14, 2022
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Progress in Orthotopic Pig Heart Transplantation in Nonhuman Primates.
Matthias Längin1, Martin Bender1, Michael Schmoeckel2
1Department of Anesthesiology, LMU University Hospital, LMU Munich, Munich, Germany.
Summary
Porcine heart xenotransplantation shows promise for overcoming human organ shortages. Recent advances in genetic modification and immunosuppression have achieved 6-9 month survival in a pig-to-primate model, paving the way for clinical trials.
Area of Science:
- Transplantation immunology
- Xenotransplantation research
- Cardiovascular surgery
Background:
- Human organ transplant demand significantly exceeds availability.
- Porcine heart xenotransplantation is a potential solution.
- The pig-to-nonhuman primate model is crucial for assessing feasibility.
Purpose of the Study:
- To review three decades of cardiac xenotransplantation research.
- To detail recent advances in overcoming xenograft rejection and dysfunction.
- To assess the readiness of xenotransplantation for clinical trials.
Main Methods:
- Genetic modification of donor pigs to prevent rejection and coagulation issues.
- Advanced organ preservation techniques to avoid perioperative dysfunction.
- Immunosuppressive and immunomodulatory therapies to manage recipient immune responses.
- Growth control strategies to prevent detrimental overgrowth.
- Screening donor pigs for porcine cytomegalovirus.
Main Results:
- Consistent survival of 6-9 months achieved in orthotopic pig-to-primate xenotransplantation.
- Genetic modifications successfully addressed hyperacute rejection and coagulation.
- New preservation and immunosuppression methods improved xenograft function.
- Growth control and infection prevention strategies were implemented.
Conclusions:
- Recent advancements have significantly improved outcomes in cardiac xenotransplantation.
- The pig-to-nonhuman primate model demonstrates consistent long-term survival.
- Prerequisites for initiating clinical trials in cardiac xenotransplantation have been met.
