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Page 1 od 605 rezultati
(-)-Patchouli alcohol protects against Helicobacter pylori urease-induced apoptosis, oxidative stress and inflammatory response in human gastric epithelial cells.
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(-)-Patchouli alcohol (PA), the major active principle of Pogostemonis Herba, has been reported to have anti-Helicobacter pylori and gastroprotective effects. In the present work, we aimed to investigate the possible protective effect of PA on H. pylori urease (HPU)-injured human gastric epithelial
Cholangiohepatitis and inflammatory bowel disease induced by a novel urease-negative Helicobacter species in A/J and Tac:ICR:HascidfRF mice.
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Helicobacter bilis and H. hepaticus, both urease-positive intestinal helicobacters of mice, have been shown experimentally to induce proliferative typhlocolitis in scid mice. We recently isolated a urease-negative Helicobacter sp. (H. sp.) that also induced proliferative typhlocolitis in pilot
Pro-inflammatory properties and neutrophil activation by Helicobacter pylori urease.
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The gastric pathogen Helicobacter pylori produces large amounts of urease, whose enzyme activity enables the bacterium to survive in the stomach. We have previously shown that ureases display enzyme-independent effects in mammalian models, most through lipoxygenases-mediated pathways. Here, we
Helicobacter pylori urease is a potent stimulus of mononuclear phagocyte activation and inflammatory cytokine production.
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OBJECTIVE
Helicobacter pylori surface proteins induce the production of proinflammatory mediators by mononuclear phagocytes, but the protein responsible for this stimulation has not been identified. This study determined whether urease, the major component of the soluble proteins extracted from H.
The Impact of Helicobacter pylori Urease upon Platelets and Consequent Contributions to Inflammation.
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Gastric infection by Helicobacter pylori is considered a risk factor for gastric and duodenal cancer, and extragastric diseases. Previous data have shown that, in a non-enzymatic way, H. pylori urease (HPU) activates neutrophils to produce ROS and also induces platelet aggregation, requiring ADP
Helicobacter pylori urease induces pro-inflammatory effects and differentiation of human endothelial cells: Cellular and molecular mechanism.
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A multi-target therapeutic potential of Prunus domestica gum stabilized nanoparticles exhibited prospective anticancer, antibacterial, urease-inhibition, anti-inflammatory and analgesic properties.
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BACKGROUND
Phytotherapeutics exhibit diverse pharmacological effects that are based on the combined action of a mixture of phytoconstituents. In this study, Prunus domestica gum-loaded, stabilized gold and silver nanoparticles (Au/Ag-NPs) were evaluated for their prospective anticancer,
Studies on Isoniazid Derivatives through a Medicinal Chemistry Approach for the Identification of New Inhibitors of Urease and Inflammatory Markers.
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A library of thiosemicarbazide derivatives of isoniazid 3-27, was synthesized and evaluated for their anti-inflammatory and urease inhibition activities, by using in vitro bioassays. Among these compounds 9, 10, 12, 21, and 26 were identified as new derivatives. Prolonged use of non-steroidal
Helicobacter hepaticus urease is not required for intestinal colonization but promotes hepatic inflammation in male A/JCr mice.
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Urease activity contributes to bacterial survival in the acidic environment of the stomach and is essential for persistent infection by known gastric helicobacters such as the human pathogen Helicobacter pylori. Several enterohepatic Helicobacter species (EHS) that primarily infect the less acidic
[Use of the enzyme urease and urea in some inflammatory diseases of the otorhinolaryngologic organs].
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Rapid urease test is less sensitive than histology in diagnosing Helicobacter pylori infection in patients with non-variceal upper gastrointestinal bleeding.
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OBJECTIVE
The validity of the rapid urease (CLO) test to diagnose Helicobacter pylori infection in patients with bleeding ulcers has been questioned. The aim of this paper is to evaluate the validity of the CLO test in comparison with histology in diagnosing H. pylori infection in patients with
Role of the Helicobacter pylori virulence factors vacuolating cytotoxin, CagA, and urease in a mouse model of disease.
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The pathogenic role of Helicobacter pylori virulence factors has been studied with a mouse model of gastric disease. BALB/c mice were treated orally with different amounts of sonic extracts of cytotoxic H. pylori strains (NCTC 11637, 60190, 84-183, and 87A300 [CagA+/Tox+]). The pathological effects
Auraptene attenuates gastritis via reduction of Helicobacter pylori colonization and pro-inflammatory mediator production in C57BL/6 mice.
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Helicobacter pylori is a major human pathogen that plays central roles in chronic gastritis and gastric cancer. Recently, we reported that auraptene suppressed H. pylori adhesion via expression of CD74, which has been identified as a new receptor for H. pylori urease. In this study, we attempted to
Helicobacter pylori urease suppresses bactericidal activity of peroxynitrite via carbon dioxide production.
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Helicobacter pylori can produce a persistent infection in the human stomach, where chronic and active inflammation, including the infiltration of phagocytes such as neutrophils and monocytes, is induced. H. pylori may have a defense system against the antimicrobial actions of phagocytes. We studied
The usefulness of inflammatory biomarkers in diagnosing child and adolescent's gastritis: STROBE compliant article.
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Neutrophil to lymphocyte ratio (NLR) is a simple, noninvasive, inexpensive inflammatory marker that can useful in the assessment of inflammatory activity, especially in pediatric ages. The aim of our study was to establish correlations between the presence of Helicobacter pylori (HP) proved
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