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  • Title: Experimental induction of two inner cell masses in mouse embryos by vinblastine treatment in vitro.
    Author: Naruse I, Kano S, Shoji R.
    Journal: Teratology; 1983 Oct; 28(2):215-8. PubMed ID: 6648826.
    Abstract:
    Induction of artificial fission of the inner cell mass in an in vitro embryonal culture system was attempted. Mouse blastocysts were collected from uteri on day 3 of gestation and exposed to vinblastine sulfate after removal of zona pellucida. Embryos in the control group had a single inner cell mass on the trophectoderm and developed to the postblastocyst stage. On the other hand, the inner cell masses of the embryos in experimental groups subdivided into two or more. The present results, therefore, revealed that the vinblastine treatment at the blastocyst stage induced fission of the inner cell mass in mouse embryos. Further studies are planned in improved culture conditions to determine whether each inner cell mass subdivision develops into independent embryos.
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