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• W2967419498 abstract "Shigella flexneri is an intracellular pathogen that disseminates in colonic epithelial cells through actin-based motility and formation of membrane protrusions at cell–cell contacts, that project into adjacent cells and resolve into vacuoles, from which the pathogen escapes, thereby achieving cell-to-cell spread. Actin nucleation at the bacterial pole relies on the recruitment of the nucleation-promoting factor N-WASP, which activates the actin nucleator ARP2/3. In cells, the vast majority of N-WASP exists as a complex with WIP. The involvement of WIP in N-WASP-dependent actin-based motility of various pathogens, including vaccinia virus and S. flexneri, has been highly controversial. Here, we show that WIPF2 was the only WIP family member expressed in the human colonic epithelial cell line HT-29, and its depletion impaired S. flexneri dissemination. WIPF2 depletion increased the number of cytosolic bacteria lacking actin tails (non-motile) and decreased the velocity of motile bacteria. This correlated with a decrease in the recruitment of N-WASP to the bacterial pole, and among N-WASP-positive bacteria, a decrease in actin tail-positive bacteria, suggesting that WIPF2 is required for N-WASP recruitment and activation at the bacterial pole. In addition, when motile bacteria formed protrusions, WIPF2 depletion decreased the number of membrane protrusions that successfully resolved into vacuoles." @default.
• W2967419498 created "2019-08-22" @default.
• W2967419498 creator A5016204010 @default.
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• W2967419498 date "2019-08-26" @default.
• W2967419498 modified "2023-09-25" @default.
• W2967419498 title "WIPF2 promotes<i>Shigella flexneri</i>actin‐based motility and cell‐to‐cell spread" @default.
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• W2967419498 doi "https://doi.org/10.1111/cmi.13098" @default.
• W2967419498 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31414511" @default.
• W2967419498 hasPublicationYear "2019" @default.
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