Abstract
ANALYSIS of early mammalian development is complicated by technical difficulties. The initial processes of cellular determination and differentiation in the mouse embryo take place in small populations of cells1,2, and major embryogenic events occur after uterine implantation when the embryo is largely inaccessible. Recent work, however, suggests that murine teratocarcinomas may provide a convenient model for studying mammalian development3–6. These are transplantable tumours of germ cell or embryonic cell origin3–6, typically consisting of a variety of differentiated tissues and undifferentiated stem cells. The stem cells, called embryonal carcinoma, resemble cells of early embryos in morphological, biochemical and cell surface properties, and in developmental potential3–6. They can be propagated in tissue culture to provide sufficient material for biochemical analysis. After inoculation into histocompatible adult hosts they form differentiated teratocarcinomas. They also differentiate in vitro7,8 where the first stages of their differentiation seem to parallel normal embryonic development. We show here that embryonal carcinoma cells can participate in normal embryogenesis, thus providing further evidence for the validity of the use of these cultures as a model of normal embryonic development.
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PAPAIOANNOU, V., MCBURNEY, M., GARDNER, R. et al. Fate of teratocarcinoma cells injected into early mouse embryos. Nature 258, 70–73 (1975). https://doi.org/10.1038/258070a0
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DOI: https://doi.org/10.1038/258070a0
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