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- W1997359480 abstract "Embryonic stem (ES) cells are pluripotent cells from the inner cell mass (ICM) of the blastocyst. They are capable of differentiating to various cell types, such as neural cells, cardiocytes, hepatic cells, and germ cells. The aim of this study was to establish rabbit ES cell lines as an animal model for human diseases. Blastocysts were collected from New Zealand White rabbits during Days 4 to 5 after breeding. After removal of the mucin coat and the zona pellucida by pronase, the embryos were directly cultured in ES cell medium on mitomycin C-treated mouse embryonic fibroblast (MEF) or STO feeder layers. In Experiment 1, the efficiencies of 2 different feeder layers, MEF and STO, in generating rabbit ES cell lines were compared. Six blastocysts were used for each STO and MEF feeder group. The primary ICM colonies were formed in 67% (4/6) of the cultures on the STO and 83% (5/6) on the MEF. Sixty percent of those primary colonies (3/5) were successfully grown into ES-like cell lines in the MEF feeder group. However, no cell lines were established on the STO feeder. In Experiment 2, whole blastocysts or ICMs isolated by immunosurgery were cultured to establish ES cell lines. A total of 21 blastocysts were recovered from 2 does. Eighteen whole blastocysts and 3 isolated ICMs were cultured on the MEF feeders. Twelve (67%) of the cultured whole blastocysts formed primary ICM colonies, of which 5 (42%) of the cultures continuously propagated and formed ES-like cell lines. In the immunosurgical group, 2 of the 3 isolated ICMs formed primary colonies but only 1 ES-like cell line was established. A total of 9 ES-like cell lines maintained morphological undifferentiation after 14 passages and expressed alkaline phosphatase activity. Seven of the 9 ES-like cells expressed Oct-4 and the stage-specific embryonic antigen-4 (SSEA-4) as detected by immunocytochemical staining. Two cell lines were further induced to differentiate into embryoid bodies in suspension culture. Another 3 cell lines were injected into SCID mice and one of them formed a teratoma. The competence of generating chimeric rabbits and the teratogenicity of the established ES-like cell lines are under evaluation. In conclusion, rabbit ES-like cells were efficiently generated and whole-blastocyst culturing on the MEF feeder appeared to be a preferred method for the isolation and maintenance of rabbit ES-like cell lines." @default.
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- W1997359480 date "2007-01-01" @default.
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- W1997359480 title "228 ESTABLISHMENT OF EMBRYONIC STEM-LIKE CELL LINES IN RABBITS" @default.
- W1997359480 doi "https://doi.org/10.1071/rdv19n1ab228" @default.
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