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Helicobacter pylori secretes a pore-forming toxin, VacA, that can cause numerous alterations in gastric epithelial cells and T lymphocytes. In this issue of Cell Host & Microbe, Sewald and colleagues report that beta2 integrin (CD18) mediates entry of VacA into human T cells. Downregulation of T cell responses by VacA may allow H. pylori to evade the adaptive immune response and establish persistent infection.
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Released March 26, 2019