Abstract
Summary
In 6 experiments, minced fragments of normal adult human epithelium implanted subcutaneously in previously x-irradiated heterologous hosts (rats and hamsters) became vascularized, proliferated and increased for approximately 15 days. After this period they died suddenly. In un-irradiated control animals the epithelial material survived in poor condition for 3-7 days but did not become vascularized. When transferred every 10 days to new groups of x-irradiated animals, human epithelium remained viable and in active mitosis for the duration of the experiment (3 generations or 31 days).
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