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- W2048789096 abstract "Non specific esterases (NSE) are a group of cellular carboxylesterases, enzyme markers of monocytes/macrophages, whose tissue distribution in the human body and changes in various disease states have not been adequately studied. We investigate the presence and localization of NSE, in the normal and inflamed human colonic mucosa.NSE were studied histochemically and biochemically using alpha-naphthyl acetate as the substrate, in the colonic mucosa from 67 patients with colitis of various aetiologies and 10 normal controls. In addition, esterase activity was studied biochemically in serum from colitic patients and normal controls.Histochemical study of the colonic tissue demonstrated that NSE were localised in the epithelial brush border, the goblet cells of the glands and a macrophage population of the lamina propria in the colonic mucosa of normal controls and patients with non specific colitis. In active ulcerative colitis, esterase depletion and esterase negative macrophages were identified in parallel with goblet cell disappearance. Gradual reappearance of esterase activity was found after successful treatment. Biochemical study of NSE activity showed that serum and colonic tissue esterase levels were greatly (P < 0.001) reduced in active ulcerative colitis compared to the normal controls or non specific colitis patients and they were increased after successful treatment. Despite this increase, the esterase activity in the colonic tissue from ulcerative colitis patients after treatment was significantly reduced compared to the normal controls. Interestingly, the enzyme levels from non-inflamed areas of the bowel of patients with ulcerative colitis were also significantly (P < 0.01) decreased compared to the normal controls.These data suggest that esterase reduction in ulcerative colitis is not a simple result of the inflammatory process but rather it precedes its development. This enzyme depletion might have an important pathogenetic implication in the inflammatory process." @default.
- W2048789096 created "2016-06-24" @default.
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- W2048789096 date "2002-04-01" @default.
- W2048789096 modified "2023-10-18" @default.
- W2048789096 title "Depletion of non specific esterase activity in the colonic mucosa of patients with ulcerative colitis" @default.
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- W2048789096 doi "https://doi.org/10.1046/j.1365-2362.2002.00969.x" @default.
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