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- W3200207789 abstract "Introduction: Campylobacter concisus is an oral bacterium that is associated with inflammatory bowel disease (IBD) and Barrett’s esophagus (BE). Programmed cell death ligand-1 (PD-L1) is an immune checkpoint protein that is used by tumor cells for immune evasion and has increased expression in patients with IBD and BE. We examined whether C. concisus upregulates PD-L1 expression in intestinal and esophageal epithelial cells.Methods: Human intestinal epithelial HT-29 cells and esophageal epithelial FLO-1 cells with and without interferon (IFN)-γ sensitization were incubated with C. concisus strains. The level of PD-L1 mRNA was quantified using quantitative real-time PCR. Cytokines were measured using Enzyme-Linked Immunosorbent Assay (ELISA). Apoptosis of HT-29 and FLO-1 cells were measured using caspase 3/7 assay.Results: We found that intestinal epithelial cells with IFN-γ sensitization incubated with C. concisus significantly upregulated PD-L1 expression and significantly increased the production of interleukin (IL)-8. Whereas, PD-L1 expression was significantly inhibited in IFN-γ sensitized FLO-1 cells incubated with C. concisus strains. Furthermore, FLO-1 cells with and without IFN-γ sensitization incubated with C. concisus strains both had significantly higher levels of cell death.Conclusion: C. concisushas the potential to cause damage to both intestinal and esophageal epithelial cells, however, with different pathogenic effects." @default.
- W3200207789 created "2021-09-27" @default.
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- W3200207789 date "2021-01-01" @default.
- W3200207789 modified "2023-10-17" @default.
- W3200207789 title "<i>Campylobacter concisus</i> upregulates PD-L1 mRNA expression in IFN-γ sensitized intestinal epithelial cells and induces cell death in esophageal epithelial cells" @default.
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- W3200207789 doi "https://doi.org/10.1080/20002297.2021.1978732" @default.
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