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SPI2 T3SS effectors facilitate enterocyte apical to basolateral transmigration of -containing vacuoles .
Fulde, Marcus van Vorst, Kira Zhang, Kaiyi Westermann, Alexander J Busche, Tobias Huei, Yong Chiun Welitschanski, Katharina Froh, Isabell Pägelow, Dennis Plendl, Johanna
Fulde, Marcus
van Vorst, Kira
Zhang, Kaiyi
Westermann, Alexander J
Busche, Tobias
Huei, Yong Chiun
Welitschanski, Katharina
Froh, Isabell
Pägelow, Dennis
Plendl, Johanna
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2021-09-20
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Abstract
Salmonella pathogenicity island (SPI) 2 type three secretion system (T3SS)-mediated effector molecules facilitate bacterial survival in phagocytes but their role in the intestinal epithelium in vivo remains ill-defined. Using our neonatal murine infection model in combination with SPI2 reporter technology and RNA-Seq of sorted primary enterocytes, we demonstrate expression of SPI2 effector molecules by intraepithelial Salmonella Typhimurium (S. Typhimurium). Contrary to expectation, immunostaining revealed that infection with SPI2 T3SS-mutants resulted in significantly enlarged intraepithelial Salmonella-containing vacuoles (SCV) with altered cellular positioning, suggesting impaired apical to basolateral transmigration. Also, infection with isogenic tagged S. Typhimurium strains revealed a reduced spread of intraepithelial SPI2 T3SS mutant S. Typhimurium to systemic body sites. These results suggest that SPI2 T3SS effector molecules contribute to enterocyte apical to basolateral transmigration of the SCV during the early stage of the infection.
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Gut Microbes. 2021 Jan-Dec;13(1):1973836. doi: 10.1080/19490976.2021.1973836.
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en
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1949-0984
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Attribution 4.0 International