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• W1949857534 abstract "A variety of bacterial enterocolitis in their active stages are characterized by the migration of polymorphonuclear leukocytes (PMNs) across epithelial surfaces. These mechanisms could explain some effects of enterotoxins observed in the intestinal mucosae. Here, using specific inhibitors, we investigated the potential role of CD10 (E.C. 3.4.24.11), present at the surface of human neutrophils, on formyl-Met-Leu-Phe (fMLP)-induced PMN migration across cultured monolayers of the human intestinal cell line T84. Transmigration of human neutrophils across T84 epithelial cells was observed for concentrations of fMLP as low as 10(-9) M, whereas maximal effect was achieved at 10(-7) M as determined by transepithelial resistances and PMN myeloperoxidase assays. RB25, a CD10 inhibitor, reduced by two orders of magnitude the concentration of fMLP required to obtain full neutrophil transmigration across T84 epithelial cell line. RB25 response was concentration dependent with half-maximal and maximal effect occurring at 10(-9) and 10(-7) M, respectively. These concentrations of RB25 corresponded exactly to the half-maximal and maximal inhibition of endopeptidase 24.11 at the neutrophil cell surface. However, the effect of CD10 inhibitors on PMN transmigration cannot be accounted for by a direct action on T84 epithelial cells, since these cells fail to express any detectable endopeptidase 24.11 activity. Moreover, blocking of CD10 enzymatic activity by various and selective inhibitors potentiated the effect of low concentrations of fMLP on PMN transmigration. Finally, RB25 failed to affect interleukin-8 (IL-8)-induced PMN transmigration across T84 epithelial cells, in agreement with the preference of CD10 for small peptidic substrates. Taken together, these results demonstrate that inhibition of CD10 significantly reduced the concentration of fMLP needed for eliciting transmigration of PMN across intestinal epithelia." @default.
• W1949857534 created "2016-06-24" @default.
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• W1949857534 date "1998-03-01" @default.
• W1949857534 modified "2023-10-13" @default.
• W1949857534 title "CD10 inhibitors increase f-Met-Leu-Phe-induced neutrophil transmigration" @default.
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• W1949857534 doi "https://doi.org/10.1002/jlb.63.3.312" @default.
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