Transplantation of male pronucleus derived from in vitro fertilization of enucleated oocyte into parthenogenetically activated oocyte results in live offspring in mouse.
In this study, inter-strain reconstructed embryos were produced by combining the female pronucleus of Kunming mouse (white) with male pronucleus of C57BL/6 strain (black). Metaphase II (MII) oocytes of Kunming mouse were enucleated and the zona pellucida was removed. Then, the enucleated oocytes were inseminated by capacitated sperm of C57BL/6 mouse in vitro. At the same time, MII oocytes of Kunming mouse were artificially activated using strontium chloride solution, which did not contain cytochalasin B. Finally, we removed the male pronucleus derived from C57BL/6 sperm and injected it into a parthenogenetically activated one-pronucleus oocyte by micromanipulation. The reconstructed 2-cell embryos were transplanted into the oviducts of 22 foster mother mice, each receiving about 20 embryos. In the end, seven healthy and live pups were born from one recipient.
State Key Laboratory of Reproductive Biology, Institute of Zoology, The Chinese Academy of Sciences, Beijing, China.
Feng-Yun
FY
Kong
Gang
G
Zhang
Zhi-Sheng
ZS
Zhong
Yun-Long
YL
Li
Qing-Yuan
QY
Sun
Da-Yuan
DY
Chen
D000818:Animals; D002467:Cell Nucleus / Q000235:genetics*; D004624:Embryo Transfer; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D008815:Mice, Inbred Strains; D008846:Micromanipulation; D009865:Oocytes / Q000502:physiology*; D010312:Parthenogenesis / Q000235:genetics; D011247:Pregnancy; D018873:Pregnancy Rate; D015044:Zona Pellucida