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The in vivo response of the intestinal epithelium to bacterial infection

Subject Area Parasitology and Biology of Tropical Infectious Disease Pathogens
Term from 2017 to 2022
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 327545802
 

Final Report Abstract

In vitro studies during the last decades have illustrated the intricate interaction of the enteric pathogen Salmonella (Salmonella Typhimurium) with the intestinal epithelium. However, immortalized cell lines lack final cell differentiation, fail to display the many different epithelial cell types of the gut epithelium and to replicate their interaction and are deprived of environmental signals from the gut lumen such as e.g. the microbiota or the diet and stimuli from the underlying immune cells. We therefore used our recently established neonatal mouse infection model that allows visualization of intraepithelial Salmonella and the analysis of the induced host response. We studied the role of important Salmonella pathogenicity island (SPI)1 and 2 type three secretion system (T3SS) effector molecules during enterocyte invasion, intraepithelial proliferation and cell egress. Also, we analyzed the mucosal response to gut colonization and invasive infection in order to better understand the pathogenesis of Salmonella infection in vivo and identify age-dependent differences in the host-microbial interaction.

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