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Apoptosis induced in small intestinal crypts by low doses of radiation protects the epithelium from genotoxic damage

International Congress Series, ISSN: 0531-5131, Vol: 1236, Issue: C, Page: 407-413
2002
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The ultimate stem cells in the small intestinal crypts divide about 1000 times in the lifetime of a mouse and through a series of transit dependent dividing cell generations produce about 2.5×10 11 intestinal epithelial cells in the 3-year life span. In spite of the large number of stem cells in the small intestine and their rapid and extensive cell cycles, genetic defects leading to cancer or age-related deterioration are rare, indicating that the cells are well protected against these changes. Here, discussed are three ways in which protection is afforded.

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