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- W1965254865 abstract "Helicobacter pylori is a highly successful human-specific gastric pathogen that colonizes more than half the world's population. Infection with this bacterium can induce gastric pathologies ranging from chronic gastritis to peptic ulcers and even cancer. Virulent H. pylori isolates harbour the cag (cytotoxin-associated genes) pathogenicity island, a 40 kb stretch of DNA that encodes components of a type IV secretion system (T4SS). This T4SS forms a pilus for the injection of virulence factors into host target cells such as the CagA oncoprotein. This is accomplished by a specialized adhesin of the pilus surface, the CagL protein, which binds to and activates host cell integrins for subsequent delivery of CagA across the host cell membrane. Injected CagA becomes tyrosine-phosphorylated by Src and Abl family kinases and mimics a host cell protein in binding and activation of multiple signalling factors. Here we review the recent advances in the characterization of phosphorylation-dependent and phosphorylation-independent signalling activities of CagA and the T4SS which include the induction of membrane dynamics, actin cytoskeletal rearrangements and the disruption of cell-to-cell junctions as well as proliferative, pro-inflammatory and anti-apoptotic nuclear responses. The contribution of these signalling cascades to H. pylori pathogenesis is discussed." @default.
- W1965254865 created "2016-06-24" @default.
- W1965254865 creator A5042757297 @default.
- W1965254865 creator A5056524563 @default.
- W1965254865 date "2008-08-01" @default.
- W1965254865 modified "2023-10-17" @default.
- W1965254865 title "Role of type IV secretion in<i>Helicobacter pylori</i>pathogenesis" @default.
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- W1965254865 doi "https://doi.org/10.1111/j.1462-5822.2008.01156.x" @default.
- W1965254865 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18410539" @default.
- W1965254865 hasPublicationYear "2008" @default.
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