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• W2953112693 abstract "Abstract Membrane vesicles (MVs) serve as a vital source of virulence factors in many pathogenic organisms. The release of MVs by Listeria monocytogenes is only recently recognized, but its role in the pathogenesis is poorly understood. Here, we investigated the role of MVs of L. monocytogenes in virulence and host interactions. Proteomic analyses of whole cells and MVs of L. monocytogenes were performed using LC/MS/MS. A total of 1376 and 456 proteins were identified in the L. monocytogenes cells and MVs, respectively. Also, we have found that MVs contains active pore-forming listeriolysin (LLO), internalin B (inlB), phosphatidylinositol-specific phospholipase C (PI-PLC-A). We have previously reported that MVs of L. monocytogenes can infect and induce cytotoxicity in Caco-2 cells. In this study, we report the transcriptome response of Caco-2 cells upon infection with MVs as well as L. monocytogenes . In particular, we observed the up-regulation of autophagy-related genes in the early phase of infection with MVs. Transcription of inflammatory cytokines (CCL2, CXCL6, CXCL8, CXCL15, CXCL5, CXCL10) peaked at four h of infection. A large number of differentially expressed genes was associated with actin cytoskeleton rearrangement, autophagy, cell cycle arrest, and induction of oxidative stress. At a later time point, transcriptional programs generated upon infection with MVs point toward to evade innate immune signals, by modulating the expression of anti-inflammatory genes. KEGG pathway enrichment analysis revealed that MVs induce several signaling pathways such as PI3k-Akt signaling pathway, mitogen-activated protein kinase (MAPK) pathway, NOD-like receptor signaling pathway, cAMP signaling pathway, TNF, and NF-kB signaling pathway. Moreover, MVs induced the expression of cell cycle regulatory genes, which may result in the ability to prolong host cell survival, thus protecting the replicative niche for L. monocytogenes . Notably, we identified several non-coding RNAs (ncRNAs) are regulated during infection, suggesting that an early manipulation of the host gene expression may be essential for L. monocytogenes persistence and replication in host cells." @default.
• W2953112693 created "2019-06-27" @default.
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• W2953112693 date "2019-06-23" @default.
• W2953112693 modified "2023-09-27" @default.
• W2953112693 title "Transcriptome responses of intestinal epithelial cells induced by membrane vesicles of Listeria monocytogenes unveil novel insights into the host-pathogen cross talk" @default.
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• W2953112693 doi "https://doi.org/10.1101/679951" @default.
• W2953112693 hasPublicationYear "2019" @default.
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