mortality/aging
N |
• unlike mice with complete recombination of the floxed allele in the entire intestinal epithelium, mice with a mosaic pattern of recombination show no increase in mortality up to at least 1 year of age
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digestive/alimentary system
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• the small intestine contains patches of abnormal crypts with a recombined allele mixed with areas of normal crypts with an unrecombined allele
• crypts with the recombined allele completely lack goblet, Paneth, and enteroendocrine cells instead containing only absorptive enterocytes
• a significant increase in BrdU+ cells and mitotic figures is seen in crypts with a recombined allele
• crypts with a recombined allele are smaller than neighboring crypts in which recombination did not occur
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• the adaptive response following resection of the middle 50% of the small bowel is blunted with a smaller increase in crypt depth compared to control mice
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endocrine/exocrine glands
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• the small intestine contains patches of abnormal crypts with a recombined allele mixed with areas of normal crypts with an unrecombined allele
• crypts with the recombined allele completely lack goblet, Paneth, and enteroendocrine cells instead containing only absorptive enterocytes
• a significant increase in BrdU+ cells and mitotic figures is seen in crypts with a recombined allele
• crypts with a recombined allele are smaller than neighboring crypts in which recombination did not occur
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