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Updated: Feb 1, 2026

Quantification of Circulating Pig-Specific DNA in the Blood of a Xenotransplantation Model

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Published on: September 22, 2020

Xenotransplantation: Progress Along Paths Uncertain from Models to Application.

Jeffrey L Platt¹, Marilia Cascalho¹, Jorge A Piedrahita²

¹Surgery, Microbiology & Immunology, and Transplantation Biology, University of Michigan, Ann Arbor, Michigan.

|December 13, 2018

Summary

Xenotransplantation, using animal organs for humans, faces biological barriers but shows promise. Genetic engineering in pigs is improving outcomes and enabling new approaches like reverse xenotransplantation.

Keywords:

adaptive immunity clinical xenotransplantation gene editing innate immunity molecular incompatibility nonhuman primate reverse xenograft transgenic pig xenotransplantation zoonosis

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Area of Science:

Biomedical Engineering
Transplantation Science
Immunology

Background:

Xenotransplantation (animal-to-human organ transplantation) offers a solution to human organ scarcity.
Allotransplantation (human-to-human) success fueled interest in xenotransplantation.
Significant biological barriers hinder clinical xenotransplantation.

Purpose of the Study:

To explore genetic engineering as a method to overcome xenotransplantation barriers.
To review advancements in genetically modifying pigs for xenotransplantation.
To discuss the potential of reverse xenotransplantation using human stem cells in pigs.

Main Methods:

Review of genetic engineering techniques applied to large animals, particularly pigs.
Analysis of experimental xenograft outcomes in nonhuman primates.
Examination of conditions supporting human stem cell differentiation in pigs.

Main Results:

Genetic engineering has significantly improved experimental xenograft outcomes.
Development of reverse xenotransplantation models using pigs.
Progress in overcoming immune and biological incompatibilities.

Conclusions:

Genetic engineering holds potential for advancing xenotransplantation and reverse xenotransplantation.
Current models require further development for clinical application.
Addressing biological barriers remains crucial for successful xenotransplantation.