Clonal Lines of Transgenic Fibroblast Cells Derived from the Same Fetus Result in Different Development When Used for Nuclear Transfer in Pigs

Different factors are believed to influence the outcome of nuclear transfer (NT) experiments. Besides the cell cycle stage of both recipient cytoplast and donor karyoplast, the origin of the donor cells (embryonic, fetal, and adult) is of interest. We compared in vitro development of NT embryos deri...

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Bibliographic Details
Published in:Biology of reproduction 2001-06, Vol.64 (6), p.1695-1698
Main Authors: Kühholzer, B, Hawley, R J, Lai, L, Kolber-Simonds, D, Prather, R S
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
Blastocyst - physiology
Cells, Cultured
Cleavage Stage, Ovum
Clone Cells
Embryology: invertebrates and vertebrates. Teratology
Female
Fetus - cytology
Fibroblasts - ultrastructure
Fundamental and applied biological sciences. Psychology
Gestational Age
Morula - physiology
Nuclear Transfer Techniques
Oocytes - ultrastructure
Organogenesis. Physiological fonctions
Physiological fonctions
Swine
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Summary:Different factors are believed to influence the outcome of nuclear transfer (NT) experiments. Besides the cell cycle stage of both recipient cytoplast and donor karyoplast, the origin of the donor cells (embryonic, fetal, and adult) is of interest. We compared in vitro development of NT embryos derived from small serum-starved (G0) or small cycling (G1) porcine fetal fibroblast cells. Serum starvation did not have a positive effect on cleavage rate or the percentage of embryos that developed to the morula and blastocyst stages. Next, we investigated the development of porcine NT embryos derived from different transgenic clonal cell lines that had originated from the same fetus. When different clonal lines of fetal fibroblasts were fused to enucleated metaphase II oocytes, differences in fusion rates as well as in development to the morula and blastocyst stages were observed ( P < 0.05). When oocytes derived from sow ovaries were used as recipient cytoplasts, significantly better cleavage ( P = 0.03) and blastocyst formation ( P < 0.014) was obtained when compared with oocytes derived from gilts. Our data indicate that not only different cell lines, but also different clones derived from one primary cell line, result in different development when used for NT. In addition, the use of sow oocytes as a cytoplast source also improves the efficiency of NT experiments.
ISSN:0006-3363
1529-7268
DOI:10.1095/biolreprod64.6.1695