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Studies on the Efficient Embryo Transfer Methods using Inbred Embryos in Generation of Transgenic Mice  

Wang A. G (Korea Research Institute of Bioscience and Biotechnology)
Kim, S. U. (Korea Research Institute of Bioscience and Biotechnology)
Y. H. Han (Korea Research Institute of Bioscience and Biotechnology)
Kim, S. K. (College of Vet. Med., Chungnam National University)
D. Y. Yu (Korea Research Institute of Bioscience and Biotechnology)
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Abstract
The objective of this study is to improve the efficiency of embryo transfer in generation of transgenic mice using inbred mouse (C57BL/6J) embryos. The embryos of C57BL/6J and BCF1 mice were superovulated by the standard protocol. One-cell stage of embryos were microinjected and the resulted one-or two-cell were transferred into one-or two-side oviducts of foster mother, respectively. When one-cell stage of embryos were transferred into one-side oviduct of 0.75 d.p.c. foster mother, the results were not ideal because of showing pregnancy ratios of 68.8$\pm$7.83% for C57BL/6J and 48.3$\pm$14.22% for BCF1, and development ratios of pups vs transferred embryos of 11.9$\pm$5.51% for C57BL/6J and 10.5$\pm$8.03% fur BCF1 . However, when two-cell stage of embryos were transferred into two-side oviducts of 0.5 d.p.c. foster mother, we got better results of 94.4$\pm$9.64% and 100$\pm$0% pregnancy ratio, and 22.1$\pm$0.4% and 21.8$\pm$0.38% development ratio for C57BL/6J and BCF1, respectively. Therefore, transferring two-cell stage of C57BL/6J embryos into two-side oviducts of 0.5 d.p.c. foster mother may be competitive to the result in BCF1 embryos. Even if there are a lot of other factors affecting these results, we conclude from these experiments that transfer of two-cell embryos into two-side oviducts of 0.5 d.p.c. foster mother is a more efficient and safe method than others in generating transgenic mice using inbred mice embryos.
Keywords
Inbred mouse; Embryo transfer; Superovulation;
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