Potential Infectious Complications in Pig Xenograft Donors and Recipients

Area of Science:

• Xenotransplantation research
• Infectious disease control
• Veterinary virology

Background:

• Xenotransplantation, using animal organs in humans, faces challenges like disease transmission (xenozoonoses).
• Preclinical studies show pig viruses can transfer with transplanted organs, posing risks.
• Designated pathogen-free (DPF) donor animals are vital for pathogen elimination.

Purpose of the Study:

• To highlight the critical need for validated diagnostic regimens in xenotransplantation.
• To emphasize pathogen detection in donor animals and recipients for safety.
• To inform future xenotransplantation trials in Europe using existing data.

Main Methods:

• Review of preclinical and clinical xenotransplantation trial data.
• Analysis of pathogen detection challenges, particularly for latent viruses.
• Case study of pig-to-man cardiac transplantation involving porcine cytomegalovirus (PCMV) and porcine circovirus (PCV).

Main Results:

• Successful xenotransplantation outcomes are contingent on preventing xenozoonoses.
• PCMV and PCV were detected in a pig-to-man cardiac transplant, underscoring diagnostic needs.
• Validated, sensitive, and specific pathogen detection systems are required.

Conclusions:

• Rigorous diagnostic protocols are essential for safe xenotransplantation.
• Continuous improvement in pathogen detection is necessary for advancing xenotransplantation.
• Data from past trials must guide future diagnostic strategies for donor and recipient screening.