Xenotransplantation in Nephrology: A Narrative Review

Area of Science:

• Nephrology
• Transplantation immunology
• Biotechnology

Background:

• End-stage kidney disease (ESKD) presents a significant global health burden, characterized by a critical shortage of donor kidneys for transplantation.
• Current kidney allotransplantation, while effective, faces limitations due to organ scarcity, leading to extended wait times and increased patient mortality.

Purpose of the Study:

• To review the historical development and current state of xenotransplantation as a viable alternative for kidney replacement therapy.
• To examine the scientific breakthroughs in overcoming immunological barriers and assess emerging clinical evidence in porcine kidney xenotransplantation.

Main Methods:

• Review of scientific literature on xenotransplantation, focusing on genetic modifications in porcine donors and advancements in immunosuppressive strategies.
• Analysis of preclinical and early clinical trial data evaluating the efficacy and safety of porcine kidney xenografts.
• Discussion of novel approaches like central immune tolerance induction and risk assessment for zoonotic infections.

Main Results:

• Significant progress has been made in genetic engineering of pigs to reduce hyperacute rejection and improve graft survival.
• Emerging clinical data from early trials suggest feasibility, with ongoing monitoring for long-term outcomes and safety.
• Key challenges remain, including immunological compatibility, risk of cross-species pathogen transmission, and ethical considerations.

Conclusions:

• Xenotransplantation, particularly using genetically modified porcine kidneys, represents a promising avenue to address the global organ shortage for kidney transplantation.
• Continued research, clinical trials, and ethical deliberation are crucial for realizing the full potential of xenotransplantation and its societal impact.