title: Cytoplasts from two-cell embryos for nuclear transplantation in the mouse.
abstract: Cytoplasts for nuclear transplantation were prepared by microsurgical enucleation of one or both blastomeres of C57BL/6J and 129/Sv-ter 2-cell embryos. The survival of cytoplasts was high (85 to 97%) in both inbred strains. When cytoplasts with a "doubled" amount of cytoplasm were prepared by electrofusion of enucleated blastomeres in individual embryos, the fusion rate in C57BL/6J embryos was 93% while in 129/Sv-ter only 2%. Similar fusion rates were obtained for C57BL/6J (100%) and 129/Sv-ter (7%) embryos when enucleated and intact blastomeres were fused. The live foetuses and young born after transfer of manipulated embryos into day-1 recipients showed that enucleation and electrofusion were compatible with normal pre- and post-natal development.
authors.affiliation: Institute of Molecular Genetics, Czechoslovak Academy of Sciences, Praha.
authors.forename: V
authors.initials: V
authors.lastname: Landa
mesh_terms: D000818:Animals; D001757:Blastomeres / Q000502:physiology / Q000648:ultrastructure*; D002467:Cell Nucleus / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D004624:Embryo Transfer; D005260:Female; D051379:Mice; D008810:Mice, Inbred C57BL; D053652:Nuclear Transfer Techniques