InducedHelicobacter pylorivacuolating cytotoxin VacA expression after initial colonisation of human gastric epithelial cells
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چکیده
منابع مشابه
Helicobacter pylori cytotoxin VacA increases alkaline secretion in gastric epithelial cells.
Human infection by the bacterium Helicobacter pylori (Hp) may lead to severe gastric diseases by an ill-understood process involving several virulence factors. Among these, the cytotoxin VacA is associated with higher tissue damage. In this study, the isolated frog stomach model was used to characterize the acute effects of VacA on the gastric epithelium. Our results show that VacA partially in...
متن کاملExpression of CD44 and its variants on gastric epithelial cells of patients with Helicobacter pylori colonisation.
BACKGROUND Studies have suggested that expression of the adhesion molecule CD44 may be of prognostic importance in gastric cancer. In addition, there is strong evidence that Helicobacter pylori has a role in gastric cancer. AIMS To determine the expression of CD44 and its variants (v6, v9) and HLA class II molecules on human gastric epithelial cell and intraepithelial lymphocytes in patients ...
متن کاملHelicobacter pylori vacuolating cytotoxin, VacA.
Helicobacter pylori is the leading bacterial cause of food-borne illness worldwide and plays a major role in the development of chronic gastritis, peptic ulcer, and gastric cancer. Strains isolated from patients contain the cagA gene (cytotoxin-associated gene A) and produce the vacuolating cytotoxin, VacA. Recent molecular and cellular studies of VacA action have begun to unravel its structure...
متن کاملDynamin is involved in human epithelial cell vacuolation caused by the Helicobacter pylori-produced cytotoxin VacA.
The Helicobacter pylori-produced cytotoxin VacA induces intracellular vacuolation. To elucidate the molecular mechanism of vacuole formation by VacA, we examined the participation of dynamin, a GTPase functioning in intracellular vesicle formation, in human HeLa cells. Immunocytochemistry revealed that endogenous dynamin was localized to vacuoles induced by VacA. In cells transiently transfecte...
متن کاملHelicobacter pylori VacA cytotoxin associated with the bacteria increases epithelial permeability independently of its vacuolating activity.
Polarized epithelial monolayers of Madin-Darby canine kidney (MDCK) cells were used to study the pathogenicity of Helicobater pylori, with an emphasis on the effect of VacA. The adherence of H. pylori to MDCK monolayers resulted in a decrease in trans-epithelial resistance (TER) across the cell monolayer. Isogenic vacA mutants did not lower the TER, demonstrating that the effect is strictly lin...
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ژورنال
عنوان ژورنال: FEMS Immunology & Medical Microbiology
سال: 2003
ISSN: 0928-8244,1574-695X
DOI: 10.1016/s0928-8244(03)00226-8