Basic research on uterus transplantation in nonhuman primates in Japan

Area of Science:

• Reproductive Medicine
• Transplantation Surgery
• Primate Research

Background:

• Uterus transplantation (UTx) offers a potential solution for uterine factor infertility.
• UTx remains experimental, necessitating extensive animal research, particularly in nonhuman primates.
• Accumulating data from primate models is vital for establishing safe and effective human UTx procedures.

Purpose of the Study:

• To summarize experiences and results from cynomolgus macaque UTx studies.
• To promote further development of UTx research in nonhuman primates.
• To provide a basis for future clinical applications of UTx.

Main Methods:

• Review of accumulated data from UTx research in cynomolgus macaques since 2009.
• Examination of uterine blood flow, surgical procedures (autologous and allogeneic), organ perfusion, and immunological responses.
• Analysis of ischemia/reperfusion injury in UTx models.

Main Results:

• Achieved the first delivery after autologous UTx in primates.
• Reported the first periodic menstruation recovery after allogeneic UTx in nonhuman primates.
• Compiled significant data on surgical techniques, immunological responses, and injury management.

Conclusions:

• Basic animal studies, especially in nonhuman primates, are essential for the clinical establishment of UTx.
• Accumulated data and experience in cynomolgus macaques are valuable for future human UTx trials.
• Further validation in nonhuman primate models is required to address medical challenges and advance human UTx.