Xenotransplantation: Where do we stand in 2016?

Area of Science:

• Transplantation immunology
• Genetics
• Bioethics

Background:

• Growing demand for organ transplants worldwide exceeds donor availability.
• Xenotransplantation, using animal organs, presents a potential solution but faces immunological challenges.
• Recent advancements have significantly improved xenotransplantation outcomes.

Purpose of the Study:

• To review the current status of xenotransplantation research.
• To highlight progress in overcoming immunological hurdles.
• To discuss regulatory and safety aspects for upcoming clinical trials.

Main Methods:

• Review of recent international congress findings (IXA 2015, ATC 2016).
• Analysis of outcomes in nonhuman primate models with multitransgenic pig organs.
• Evaluation of clinical trials with porcine islets and CRISPR/Cas9 gene editing.

Main Results:

• Significantly improved survival rates for pig organ xenografts in nonhuman primates using multitransgenic pigs.
• No safety issues observed in clinical trials involving porcine islets.
• CRISPR/Cas9 technology successfully removed porcine endogenous retroviruses, mitigating xenozoonosis risk.

Conclusions:

• Xenotransplantation research has seen remarkable progress, driven by genetic advancements and improved preclinical/clinical data.
• The use of multitransgenic pigs and gene editing technologies enhances graft survival and safety.
• Xenotransplantation is a promising field with increasing interest and potential for clinical application.