Lung transplantation. Xenotransplantation

Area of Science:

• Transplantation immunology
• Xenotransplantation research
• Genetically engineered organs

Background:

• Lung allotransplantation success exacerbates donor organ shortages.
• Xenotransplantation offers a potential solution but faces substantial challenges.
• The lung is particularly vulnerable to xenograft rejection compared to other organs.

Purpose of the Study:

• To review the challenges and potential strategies for successful lung xenotransplantation.
• To highlight the unique difficulties associated with lung xenografts.
• To outline a comprehensive approach for clinical xenotransplantation.

Main Methods:

• Review of current advancements in xenotransplantation, particularly with genetically modified pigs (e.g., alpha-Gal knockout).
• Analysis of organ survival data from preclinical xenotransplantation models.
• Examination of immunological barriers specific to lung xenografts.

Main Results:

• Progress has been made in generating genetically modified donor animals, improving organ survival in some models.
• Lung xenografts demonstrate extreme sensitivity to rejection, resisting strategies successful in other organs.
• Significant investment has yielded incremental increases in organ survival times for most organs.

Conclusions:

• Lung xenotransplantation remains a formidable challenge due to intense immunological rejection.
• A complex, integrated strategy involving genetically modified organs, recipient conditioning, and targeted immunosuppression is necessary.
• Further research is critical to overcome the unique barriers to clinical lung xenotransplantation.