Infectious disease issues in xenotransplantation

Area of Science:

• Transplantation immunology
• Infectious diseases
• Genetic engineering

Background:

• Xenotransplantation, using animal organs/tissues in humans, addresses the critical shortage of human organs.
• While whole-organ xenotransplantation is preclinical, cellular xenotransplantation shows early clinical promise.
• Advances in immunosuppression and genetic engineering are advancing xenotransplantation protocols.

Purpose of the Study:

• To review the potential for infectious disease transmission in xenotransplantation.
• To assess the risks associated with using genetically engineered pigs as a source.
• To emphasize the need for rigorous monitoring in xenotransplantation trials.

Main Methods:

• Literature review focusing on xenotransplantation and zoonotic/xenogeneic infections.
• Analysis of risks associated with different animal sources, particularly pigs.
• Evaluation of current clinical trial data and preclinical findings.

Main Results:

• Immunologic rejection remains a primary challenge in xenotransplantation.
• The potential for introducing infections across species barriers is a significant concern.
• Genetically engineered pigs are the favored source, but carry risks of xenotropic retroviruses and microchimerism.

Conclusions:

• Despite no current evidence of human infections from pig xenotransplantation, potential risks exist.
• Long-term clinical and laboratory monitoring is essential for xenotransplantation safety.
• Regulatory oversight is critical for ongoing xenotransplantation research and trials.