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• W2067421608 abstract "Campylobacter fetus is a recognized pathogen of cattle and sheep, though human infection has also been reported. Ingestion of contaminated food or water is a proposed route of transmission for both humans and animals. The subsequent detection of the organism from extra-intestinal and systemic locations implies an ability to translocate across epithelial barriers. To determine how C. fetus disseminates from the intestine, Caco-2 cells cultured on porous membrane supports, were used as model intestinal epithelial cell monolayers. C. fetus was found to translocate equally well in both apical-to-basolateral and basolateral-to-apical directions for up to 24 h without altering Caco-2 cell monolayer permeability as assessed by transepithelial resistance and absence of paracellular diffusion of FITC-inulin. Using modified antibiotic protection assays, C. fetus was also observed to invade and subsequently egress from Caco-2 cells. Caco-2 cell invasion and translocation occurred independently of C. fetus S layer expression. Scanning and transmission electron microscopy revealed the presence of C. fetus associated with both apical and basal surfaces as well as in intracellular locations. C. fetus was, however, never observed in paracellular locations nor associated with Caco-2 cells junctions. Neither C. fetus invasion nor translocation across Caco-2 cell monolayers was impacted by latrunculin A, though translocation was enhanced in the presence of cytochalasin D which disrupted tight junctions. Tubulin cytoskeleton disrupting agents, colchicine and vinblastine, did inhibit C. fetus translocation though entry into Caco-2 cells remained unaffected. Together, translocation without disrupting monolayer integrity, invasion and egression from Caco-2 cells, electron microscopy observations and the requirement of a functional tubulin cytoskeleton for translocation, support a transcellular mechanism of C. fetus translocation across Caco-2 cell monolayers. The ability to invade and subsequently egress would contribute to establishment of an infecting C. fetus population in the host, while the demonstrated ability to translocate across model intestinal epithelial barriers accounts for the observed in vivo recovery of C. fetus from extra-intestinal locations." @default.
• W2067421608 created "2016-06-24" @default.
• W2067421608 creator A5041853284 @default.
• W2067421608 creator A5064850866 @default.
• W2067421608 date "2010-11-01" @default.
• W2067421608 modified "2023-09-27" @default.
• W2067421608 title "Campylobacter fetus translocation across Caco-2 cell monolayers" @default.
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• W2067421608 doi "https://doi.org/10.1016/j.micpath.2010.06.008" @default.
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