Enhancing Immunotolerance in Genetically Modified Pigs for Xenotransplantation: Mechanisms and Outcomes

The shortage of human organs for transplantation has driven significant interest in xenotransplantation, particularly using genetically modified pigs. This study explores the mechanisms and outcomes of enhancing immunotolerance in genetically modified pigs for xenotransplantation. Recent advancements in genetic engineering, such as the deletion of xenoantigens and the expression of human complement and coagulation regulatory proteins, have shown promise in reducing immune rejection and prolonging graft survival. Studies have demonstrated that genetically engineered pig hearts and kidneys can survive for extended periods in non-human primates, with some grafts functioning beyond one year. These findings suggest that targeted genetic modifications, combined with specific immunosuppressive regimens, can significantly improve the viability of pig organs for clinical xenotransplantation. However, challenges remain, including the need for further optimization of genetic modifications and immunosuppressive protocols to prevent chronic rejection and ensure long-term graft function.