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• W2074069923 abstract "Background and Objectives. Intracellular location of Helicobacter pylori in human gastric epithelial cells has been observed in biopsies. Whether this reflects an ability to invade host cells and establish an intracellular niche remains to be determined. Methods. The interactions between a clinical isolate of H. pylori and primary cell cultures from human gastric epithelium or the human epithelial cell line HEp-2 were monitored using time-lapse photography. This technique allows studies of the dynamics of host-microbial interactions. Results. H. pylori cells readily approached and established close contacts with epithelial cells followed by uptake of the bacteria into the cellular cytoplasm. Entry into epithelial cells was achieved through an active process of bacterial motility and penetration of the cell membranes. In conventional invasion assays using HEp-2 cells, an increased internalization in a strain producing the vacuolating cytotoxin was observed, compared to the isogenic VacA knockout mutant. Conclusion. Invasion of gastric epithelium represents a hitherto unappreciated trait of H. pylori that could contribute to the bacterium's ability to establish persistent infection that evades the mucosal immune defense and sometimes also antimicrobial therapy. A small number of bacterial cells with a transient intracellular habitat could serve as a seeder population, providing a backup for a constantly challenged and fluctuating luminal population." @default.
• W2074069923 created "2016-06-24" @default.
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• W2074069923 date "2000-09-01" @default.
• W2074069923 modified "2023-10-11" @default.
• W2074069923 title "<i>Helicobacter pylori</i>Entry into Human Gastric Epithelial Cells: A Potential Determinant of Virulence, Persistence, and Treatment Failures¹" @default.
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• W2074069923 doi "https://doi.org/10.1046/j.1523-5378.2000.00023.x" @default.
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