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- W2344907098 abstract "Background & Aims: Confocal endomicroscopy is an emerging technology that poses the endoscopist with challenges for identifying epithelial structures in the human intestine. We have shown previously that the murine intestinal epithelium is punctuated by gaps caused by cell shedding. The goals of this study were to determine if confocal endomicroscopy could resolve the presence of human epithelial gaps and whether a proinflammatory cytokine could increase cell shedding. Methods: Intestinal mucosa was imaged after staining with acriflavine. Confocal endomicroscopy of 17 patients yielded 6277 images from the human terminal ileum and rectum. Results were validated by parallel studies of anesthetized mice (wild-type and Math1 Intestine ) using rigid confocal probe microscopy, 2-photon/confocal microscopy, and scanning electron microscopy. Results: Human terminal ileal and rectal epithelium revealed unstained areas with the diameter of an individual epithelial cell, with 2 distinct morphologies. One had a “target” appearance, shown by mouse studies to be goblet cells. The other morphology had no nucleus and was observed by rigid confocal probe microscopy and scanning electron microscopy in the villi of Math1 Intestine mice, which lack goblet cells. In the mouse, tumor necrosis factor (0.33 g/g intraperitoneally) increases cell shedding by 27-fold and caused loss of barrier function across 20% of resultant gaps. Conclusions: Confocal endomicroscopy can distinguish between epithelial discontinuities (gaps) and goblet cells in human intestine. Results suggest that the sealing of epithelial gaps must be considered as a component of the intestinal barrier and has potential implications for intestinal barrier dysfunction in human disease." @default.
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- W2344907098 date "2007-01-01" @default.
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- W2344907098 title "CLINICAL-ALIMENTARY TRACT Identification of Epithelial Gaps in Human Small and Large Intestine by Confocal Endomicroscopy" @default.
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