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Helicobacter pylori urease and flagellin alter mucin gene expression in human gastric cancer cells.
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BACKGROUND
Helicobacter pylori (Hp), which is one of the causative agents in human gastric adenocarcinoma, is known to interact with mucous gel and alter mucin gene expression. The aim of this work was to study, using an in vitro model of cell infection, the effects of urease, flagellin, and CagA
Urease-induced alkalinization of extracellular pH and its antitumor activity in human breast and lung cancers.
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Jack bean urease catalyzes the decomposition of urea into ammonia, which in turn increases the pH of the surrounding medium. Based on these two properties, we have investigated the antitumor effects of urease in vitro and in vivo on human lung and breast cancer cell lines either by the enzyme itself
Production and characterization of a camelid single domain antibody-urease enzyme conjugate for the treatment of cancer.
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A novel immunoconjugate (L-DOS47) was developed and characterized as a therapeutic agent for tumors expressing CEACAM6. The single domain antibody AFAIKL2, which targets CEACAM6, was expressed in the Escherichia coli BL21 (DE3) pT7-7 system. High purity urease (HPU) was extracted and purified from
Targeting 3D Bladder Cancer Spheroids with Urease-Powered Nanomotors.
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Cancer is one of the main causes of death around the world, lacking efficient clinical treatments that generally present severe side effects. In recent years, various nanosystems have been explored to specifically target tumor tissues, enhancing the efficacy of cancer treatment and minimizing the
(-)-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
Helicobacter pylori: the link with gastric cancer.
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Gastric cancer is the world's overall second most common cancer, and carries a bad prognosis. In the Correa model of gastric carcinogenesis, environmental factors (salt, nitrate, a lack of vitamin C and beta-carotene, bile reflux, bacterial overgrowth in atrophic gastritis with nitrosamine
Removal of urea from alcoholic beverages with an acid urease.
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Urethan, a cancer causing chemical, was reported to contaminate some alcoholic beverages. Since urethan is formed by heating urea with ethyl-alcohol, removal of urea is necessary to prevent urethan formation in alcoholic beverages. Acid urease, whose optimal pH lies around 4, lowered urea
Plant-Derived Urease Inhibitors as Alternative Chemotherapeutic Agents.
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Inhibition of the metalloenzyme urease has important pharmacologic applications in the field of antiulcer and antigastric cancer agents. Urease is involved in many serious infections caused by Helicobacter pylori in the gastric tract as well as by Proteus and related species in the urinary tract.
A cheap, simple high throughput method for screening native Helicobacter pylori urease inhibitors using a recombinant Escherichia coli, its validation and demonstration of Pistacia atlantica methanolic extract effectivity and specificity.
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Helicobacter pylori is the most frequent and persistent bacterial infection worldwide, and a risk factor for active gastritis, peptic ulcers, mucosa-associated lymphoid tissue lymphoma, and gastric cancer. Although combined antibiotics treatment is effective cases of antibiotic resistance are
[Polymorphism of Helicobacter pylori urease genes and gastric diseases].
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Helicobacter pylori (HP) is now recognized as a major etiologic agent of chronic gastritis and peptic ulcer and is recently presumed to be a cofactor in the occurrence of gastric cancer. HP has a high urease activity, which possibly plays a role in the pathogenesis of gastroduodenal diseases. In
Investigation of association between oipA and iceA1/iceA2 genotypes of Helicobacter pylori and gastric cancer in Iran.
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BACKGROUND
H pylori is the main causative agent of Gastric cancer and chronic gastritis. Genetic diversity of H. pylori has major contribution in its pathogenesis. We investigated the prevalence of oipA and iceA1/iceA2 positive strains of H. pylori among patients with gastric cancer and
Helicobacter pylori and gastric epithelial cells: from gastritis to cancer.
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Helicobacter pylori is a spiral, gram-negative rod-shaped pathogen that attaches to gastric epithelial cells in the human stomach and is a causative agent of chronic active gastritis, peptic ulcer and neoplasia. H. pylori is one of the most common pathogens afflicting humans and is the major
Risk of gastric cancer in children with Helicobacter pylori infection.
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BACKGROUND
Helicobacter pylori (H. pylori) is the most common chronic infectious agent in the stomach. Most importantly, it may lead to atrophy, metaplasia and cancer. The aim of this study was to investigate the incidence of H. pylori infection and to detect early mucosal changes that may lead to
[Importance of Helicobacter pylori in the pathogenesis of gastric cancer. Experimental models in rodents].
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We found that the seroprevalence in Cancer Institute of H. pylori infection was significantly more frequent in gastric cancer than in age- and gender-matched controls. This study suggested an epidemiological link between H. pylori infection and gastric cancer. H. pylori exhibits a complex system of
Robust therapeutic potential of carbazole-triazine hybrids as a new class of urease inhibitors: A distinctive combination of nitrogen-containing heterocycles.
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The inhibition of urease enzyme is very important as it plays a key role in the treatment of several urinary and gastrointestinal tract infections. This enzyme provides a suitable environment for Helicobacter pylori at the low pH of the stomach, a causative agent of gastric and peptic ulcer that may
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