[Transgenic pigs for xenotransplants for humans]

Area of Science:

• Biotechnology and Genetic Engineering
• Transgenic Animal Technology
• Xenotransplantation Research

Context:

• Microinjection is the primary method for gene transfer in farm animals, achieving low efficiency (1-3% transgenic offspring).
• Transgene integration is random, with expression influenced by integration site rather than copy number.
• Inheritance of transgenes typically follows Mendelian genetics.

Purpose:

• To develop transgenic pigs for xenotransplantation by integrating and expressing complement-regulating gene constructs.
• To assess the efficacy of transgenic pig organs in overcoming hyperacute rejection in primate recipients.

Summary:

• Gene constructs were integrated and expressed in transgenic pigs to mitigate immune rejection for xenotransplantation.
• Hearts from these transgenic pigs, when transplanted into primates, successfully overcame hyperacute rejection.
• An average survival of approximately 40 days was observed in primate recipients of transgenic pig hearts.

Impact:

• Transgenic pig organs demonstrate potential to overcome xenotransplantation barriers, specifically hyperacute rejection.
• Clinical availability of transgenic pig organs is anticipated within 5-10 years, pending resolution of pathogen transmission concerns.
• This research paves the way for advancing xenotransplantation as a viable therapeutic option.