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- W4386861503 abstract "Abstract Adherent-invasive Escherichia coli (AIEC) is isolated from patients with Crohn’s disease (CD). AIEC can invade the intestinal epithelium, suggesting that it is involved in the development and pathogenesis of CD. However, themechanism by which AIEC acquired the invasive phenotype remains unknown. This study was designed to examine the mechanisms of AIEC invasiveness. We found that the flagellin ( fliC ) expression in AIEC was two-fold higher than that in non-AIEC strains, and this overexpression induced the formation of long-filament flagellin. Deletion of fliC in the AIEC LF82 strain resulted in the disappearance of flagellar filamentsand attenuated the motility and invasive ability of the bacterium, suggesting that the formation of long filament flagellin induced by increased fliC expression is required by AIEC to invade the intestinal epithelium. In AIEC and non-AIEC K12 strains cultured in the presence of cyclic-di-AMP (c-di-AMP), the expression of fliC was enhanced, and flagellar filaments were elongated. Stimulation with c-di-AMP enhanced the bacterial motility and ability to invade epithelial cells, even in the non-AIEC K12 strain. Our findings show that c-di-AMP confers an AIEC-like phenotype on non-AIEC strains by enhancing the expression of fliC . The results should be useful for understanding the pathogenesis of CD." @default.
- W4386861503 created "2023-09-20" @default.
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- W4386861503 date "2023-09-19" @default.
- W4386861503 modified "2023-09-27" @default.
- W4386861503 title "Cyclic-di-AMP confers an invasive phenotype on Escherichia coli through elongation of flagellin filaments" @default.
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- W4386861503 doi "https://doi.org/10.21203/rs.3.rs-3323664/v1" @default.
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