conclusions the study results showed that p53 expression increased in im, dys and gc cases with h. pylori infection compared to those without h. pylori infection. the results also suggested that, ki-67 expression was different in precancerous stages of gastric carcinogenesis, based on the infection with h. pylori. background helicobacter pylori (h. pylori) infection is considered as a carcinoge...

OBJECTIVE Chronic Helicobacter pylori (H. pylori) infection promotes non-cardia gastric cancer. Some mouse models suggest that bone marrow derived cells (BMDC) contribute to Helicobacter-associated gastric carcinogenesis. We determined whether this increased susceptibility to Helicobacter-induced gastric carcinogenesis of p27-deficient mice is dependent upon their p27-null BMDC or their p27-nul...

The stomach of pigs at slaughter age is often colonized by Helicobacter (H.) suis, which is also the most prevalent gastric non-H. pylori Helicobacter (NHPH) species in humans. It is associated with chronic gastritis, gastric ulceration and other gastric pathological changes in both hosts. Parietal cells are highly specialized, terminally differentiated epithelial cells responsible for gastric ...

Chronic ulceration of the gastroduodenal mucosa is one of the most common, so called "civilization diseases" of the gastrointestinal tract in industrially developed countries. Although the primary cause of gastric and duodenal peptic ulcers is unknown, gastric acid secretion is believed to play an important role in this major pathology. Gastric peptic ulcers, which represent 20% of all peptic u...

BACKGROUND/AIMS Gastric cancer (GC) is the second leading cause of cancer-related deaths worldwide and is the most frequent cancer in Iran. Epstein-Barr virus (EBV) has been shown to be associated with gastric cancer. The present study was carried out to investigate the prevalence of Epstein-Barr virus (EBV) associated gastric cancer among Iranian patients. METHODS Ninety formalin fixed paraf...

The Dsb protein family is responsible for introducing disulfide bonds into nascent proteins in prokaryotes, stabilizing the structure of many proteins. Helicobacter pylori HP0231 is a Dsb-like protein, shown to catalyze disulfide bond formation and to participate in redox homeostasis. Notably, many H. pylori virulence factors are stabilized by the formation of disulfide bonds. By employing H. p...

Biopsy specimens of gastric and duodenal mucosa from 326 patients were examined bacteriologically and histologically to determine the correlation between chronic gastritis and H. pylori colonization. H. pylori was identified in 111 (66.5%) patients with evidence of chronic gastritis and in 97 (82.2%) individuals who had gastritis associated with other pathology (gastric o duodenal ulcer, carcin...

A prospective search for gastro-oesophageal candidiasis was made by histological examination of all the biopsies taken from 465 patients endoscoped consecutively during a 12 month period. The criterion for diagnosis was the demonstration of infiltration of tissue or ulcer slough by yeasts and hyphae. Nineteen cases of candidiasis were found giving an overall incidence of 4%. There were 12 cases...

The gram negative, microaerophilic bacterium Helicobacter pylori colonizes the human gastric mucosa and establishes a chronic infection that is tightly associated with atrophic gastritis, peptic ulcer, and gastric carcinoma. Cloning of the H. pylori cytotoxin gene shows that the protein is synthesized as a 140-kD precursor that is processed to a 94-kD fully active toxin. Oral administration to ...