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. 1991 Apr;87(4):1474–1477. doi: 10.1172/JCI115156

In vitro model of intestinal crypt abscess. A novel neutrophil-derived secretagogue activity.

S Nash 1, C Parkos 1, A Nusrat 1, C Delp 1, J L Madara 1
PMCID: PMC295203  PMID: 2010557

Abstract

In order to model crypt abscesses, a histological finding which correlates with disease activity in intestinal inflammation, human polymorphonuclear leukocytes (PMN) were layered onto monolayers of the human intestinal epithelial cell line T84, a crypt-like epithelium which is capable of Cl- secretion. Such PMN-epithelial interaction had no substantial effect on monolayer integrity or function. However, when PMN were stimulated by conditions including those present naturally in the human colonic lumen, monolayers responded with a bumetanide-sensitive short circuit current (Isc) indicative of Cl- secretion, the basis of secretory diarrhea. This Isc response was induced by a neutrophil-derived secretagogue (NDS), which was only active when applied to the luminal surface of monolayers and did not require PMN-epithelial contact. NDS activity is resistant to boiling, acid, and trypsin and passes a 500 nominal mol wt cutoff filter. NDS activity is not secondary to the respiratory burst products O2- or H2O2 and does not appear to be a myeloperoxidase product. We speculate NDS elicited Cl- secretion may contribute to the secretory diarrhea seen in patients with intestinal inflammation and crypt abscesses.

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Selected References

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