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Xiangpeng Dai State Key Laboratory of Reproductive Biology, Graduate School of the Chinese Academy of Sciences, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
State Key Laboratory of Reproductive Biology, Graduate School of the Chinese Academy of Sciences, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China

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Jie Hao State Key Laboratory of Reproductive Biology, Graduate School of the Chinese Academy of Sciences, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China
State Key Laboratory of Reproductive Biology, Graduate School of the Chinese Academy of Sciences, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China

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Qi Zhou State Key Laboratory of Reproductive Biology, Graduate School of the Chinese Academy of Sciences, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, People's Republic of China

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Many strategies have been established to improve the efficiency of somatic cell nuclear transfer (SCNT), but relatively few focused on improving culture conditions. The effect of different culture media on preimplantation development of mouse nuclear transfer embryos was investigated. A modified sequential media method, named D media (M16/KSOM and CZB-EG/KSOM), was successfully established that significantly improves SCNT embryo development. Our result demonstrated that while lacking any adverse effect on in vivo fertilized embryos, the D media dramatically improves the blastocyst development of SCNT embryos compared with other commonly used media, including KSOM, M16, CZB, and αMEM. Specifically, the rate of blastocyst formation was 62.3% for D1 (M16/KSOM) versus 10–30% for the other media. An analysis of media components indicated that removing EDTA and glutamine from the media can be beneficial for early SCNT embryo development. Our results suggest that in vitro culture environment plays an important role in somatic cell reprogramming, and D media represent the most efficient culture method reported to date to support mouse SCNT early embryo development in vitro.

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