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Animal Reproduction and Physiology
Asian-Australasian Journal of Animal Sciences 2000;13(10): 1367-1372.
DOI: https://doi.org/10.5713/ajas.2000.1367    Published online January 1, 2000.
Estimation of the Efficiency of Transgenic Rabbit Production Following GFP Gene Microinjection into Rabbit Zygotes
D. I. Jin, K. S. Im, D. K. Kim, W. S. Choi
The present study was conducted to evaluate the efficiency of transgenic rabbit production by DNA microinjection using EGFP (Enhanced Green Fluorescent Protein) gene. In this experiment EGFP coding sequences fused to CMV promoter were microinjected into rabbit one-cell embryos, and then GFP expression and gene integration were evaluated in preimplantation embryos and fetuses recovered on day 15 of pregnancy to determine efficiency of transgenic rabbit production. Effect of DNA concentration was also tested on development in vitro following microinjection and transgene integration in fetuses. Development of embryos in vitro was decreased by DNA microinjection, but the rates of pregnancy and implantation were not significantly affected by microinjection. As development progressed in vitro percentage of GFP expression in rabbit embryos was decreased, resulting GFP expression detected in 37.5% of blastocysts. The efficiencies for production of transgenic fetuses were 4.0% and 7.6%, respectively, when 10 ng/關l and 20 ng/關l of DNA concentration were microinjected. Transgenic fetuses were confirmed by GFP expression and PCR analysis of fetus genomic DNA. These results indicated that DNA microinjection itself damaged embryo development and DNA concentration affected the efficiency of transgenic rabbit production.
Keywords: GFP Gene; Microinjection; Transgenic Rabbit; DNA Concentration
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