Our aim was to establish an efficient culture system to produce embryos by SCNT of the endangered Vietnamese Ỉ pig. Reducing the serum concentration from 10.0% to 0.2% during culture efficiently synchronized Ỉ pig fibroblasts used as donor cells at the G0/G1 stage. Oocyte maturation in a defined porcine oocyte medium (POM) supplemented with EGF and gonadotrophins resulted in higher cleavage and blastocyst rates compared with a non-defined POM containing pig follicular fluid (but without EGF) and both the defined and non-defined variants of NCSU-37. For embryo culture PZM3 and PZM5 media were superior to NCSU-37, in terms of the percentage of cleaved embryos. Addition of serum to PZM3 medium on Day 5 of culture (Day 0 ¼ SCNT) improved blastocyst development. When SCNT embryos were transferred at the blastocyst stage, 7 of 11 recipients became pregnant. However, live offspring were not obtained. In conclusion, we established a system for the production of Ỉ pig embryos by SCNT and achieved blastocyst production rate at 26.4% by improving culture systems for donor cells, oocytes and embryos culture. Transfer of embryos resulted in pregnancies; however, live offspring were not obtained.
Nguyen, V. K.; Somfai, T.; Salamone, D. F.; Thu Huong, V. T.; Nguyen, H. L. T.; Huu, Q. X.; Hoang, A. T.; & Pham, L. D. (2021). Optimization of donor cell cycle synchrony, maturation media and embryo culture system for somatic cell nuclear transfer in the critically endangered Vietnamese Ỉ pig. Theriogenology,166,p.21-28
Nguyen, Van Khanh,Somfai, Tamas,Salamone, Daniel Felipe,Thu Huong, Vu Thi,Nguyen, Huong Le Thi,Huu, Quan Xuan, et al.. 2021. "Optimization of donor cell cycle synchrony, maturation media and embryo culture system for somatic cell nuclear transfer in the critically endangered Vietnamese Ỉ pig". Theriogenology 166:21-28.
Recuperado de http://ri.agro.uba.ar/greenstone3/library/collection/arti/document/2021nguyen