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Development of porcine tetraploid somatic cell nuclear transfer embryos is influenced by oocyte nuclei
Author(s) -
Fu Bo,
Liu Di,
Ma Hong,
Guo ZhenHua,
Wang Liang,
Li ZhongQiu,
Peng FuGang,
Bai Jing
Publication year - 2016
Publication title -
cell biology international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.932
H-Index - 77
eISSN - 1095-8355
pISSN - 1065-6995
DOI - 10.1002/cbin.10554
Subject(s) - somatic cell nuclear transfer , oocyte , reprogramming , somatic cell , biology , blastocyst , embryo , microbiology and biotechnology , pronucleus , zygote , cloning (programming) , oocyte activation , genetics , embryogenesis , andrology , cell , gene , medicine , computer science , programming language
Abstract Cloning efficiency in mammalian systems remains low because reprogramming of donor cells is frequently incomplete. Nuclear factors in the oocyte are removed by enucleation, and this removal may adversely affect reprogramming efficiency. Here, we investigated the role of porcine oocyte nuclear factors during reprogramming. We introduced somatic cell nuclei into intact MII oocytes to establish tetraploid somatic cell nuclear transfer (SCNT) embryos containing both somatic nuclei and oocyte nuclei. We then examined the influence of the oocyte nucleus on tetraploid SCNT embryo development by assessing characteristics including pronucleus formation, cleavage rate, and blastocyst formation. Overall, tetraploid SCNT embryos have a higher developmental competence than do standard diploid SCNT embryos. Therefore, we have established an embryonic model in which a fetal fibroblast nucleus and an oocyte metaphase II plate coexist. Tetraploid SCNT represents a new research platform that is potentially useful for examining interactions between donor nuclei and oocyte nuclei. This platform should facilitate further understanding of the roles played by nuclear factors during reprogramming.