We studied the capacity of the nuclei of rabbit fibroblasts taken from various developmental stages for reprogramming in the cytoplasm of mature aging enucleated oocytes and the development of the cloned embryos to the preimplantation stages. A negative correlation was found between the age of an animal donor of fibroblasts and the efficiency of the development of cloned embryos (r morula-blastocyst= –0.826, r blastocyst= –0.7139). A reliably decreased capacity for reprogramming of the nuclei of donor fibroblasts was shown upon the transition from prenatal development to postnatal development, as well as a trend to a decreased capacity of nuclei for reprogramming during aging. The aging of cells in the culture, at least until the tenth passage, did not affect the capacity of the nuclei of fetal fibroblasts for reprogramming and the development of cloned embryos.
Russian Journal of Developmental Biology – Springer Journals
Published: Oct 9, 2004
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