Development potential of transgenic somatic cell nuclear transfer embryos according to various factors of donor cell

被引:15
作者
Cho, J
Bhuiyan, MMU
Shin, S
Park, E
Jang, G
Kang, S
Lee, B
Hwang, W
机构
[1] Seoul Natl Univ, Coll Vet Med, Dept Theriogenol & Biotechnol, Seoul 151742, South Korea
[2] Seoul Natl Univ, Sch Agr Biotechnol, Seoul 151742, South Korea
[3] Chungnam Natl Univ, Coll Vet Med, Dept Theriogenol, Taejon 305764, South Korea
关键词
D O I
10.1292/jvms.66.1567
中图分类号
S85 [动物医学(兽医学)];
学科分类号
0906 ;
摘要
The present study was conducted to establish an efficient production system for bovine transgenic somatic cell nuclear transfer (SCNT) embryos, the effect of various conditions of donor cells including cell type, size, and passage number on the developmental competence of transgenic SCNT embryos were examined with their expression rates of a marker gene. An expression plasmid for human prourokinase was constructed by inserting a bovine beta-casein promoter, a green fluorescent protein (GFP) marker gene, and a human prourokinase target gene into a pcDNA3 plasmid. Three types of bovine somatic cells including two adult cells (cumulus cells and ear fibroblasts) and fetal fibroblasts were prepared and transfected with the expression plasmid using a liposomal transfection reagent, Fugene6((R)), as a carrier. In Experiment 1, three types of bovine cells were transfected at passages 2 to 4, and then trypsinized and GFP-expressing cells were randomly selected and used for SCNT. Developmental competence and rates of GFP expression in bovine transgenic SCNT embryos reconstructed with cumulus cells were significantly higher than those from fetal and ear fibroblasts. In all cell types used, GFP expression rates of SCNT embryos gradually decreased with the progression of embryo development. In Experiment 2, the effect of passage number of cumulus cells in early (2 to 4) and late (8 to 12) passages was investigated. No significant differences in the development of transgenic SCNT embryos were observed, but significantly higher GFP expression was shown in blastocysts reconstructed with cumulus cells at early passage. In Experiment 3, different sizes of GFP-expressing transfected cumulus cells [large (>30 mum) or small cell (<30 mum)] at passages 2 to 4 were used for SCNT. A significant improvement in embryo development and GFP expression was observed when small cumulus cells were used for SCNT. Taken together, these results demonstrate that (1) adult somatic cells as well as fetal cells could serve as donor cells in transgenic SCNT embryo production and cumulus cells with small size at early passage were the optimal cell type, and (2) transgenic SCNT embryos derived from adult somatic cells have embryonic development potential.
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收藏
页码:1567 / 1573
页数:7
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