Gastritis Atrophic
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Gastric giardiasis.
AIMS: To assess the prevalence of gastric giardiasis in patients undergoing upper gastrointestinal endoscopy, and to define the clinicopathological correlates of gastric Giardia lamblia infection. METHODS: Consecutive gastric biopsy specimens (n = 15,023) from 11,085 patients, taken at Feltre City Hospital (north eastern Italy) from January 1986 to December
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14. Phenotypic Variation of Helicobacter pylori Isolates from Geographically Distinct Regions Detected by Lectin Typing
A total of 309 Helicobacter pylori isolates from 18 different countries were analyzed with a previously developed lectin typing system. The system was developed by using a proteolytic pretreatment to enhance the carbohydrate fraction of the sample. Four lectins from Ulex europaeus, Lotus tetragonolobus, Erythrina cristigali, and Triticum vulgaris were used t
American Society for Microbiology.
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15. Intracellular Helicobacter pylori in gastric epithelial progenitors
Helicobacter pylori is generally viewed as an extracellular pathogen. We have analyzed the tropism of H. pylori clinical isolates in a gnotobiotic transgenic mouse model of human chronic atrophic gastritis, a preneoplastic condition. These mice lack acid-producing parietal cells and have an amplified population of dividing gastric epithelial progenitors (GEP
National Academy of Sciences.
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16. Campylobacter like organisms and reflux gastritis.
A total of 98 patients, who had undergone gastric surgery (23), or who had peptic ulcers (56), or who had normal endoscopic findings (19) underwent gastric biopsy, together with measurement of pH and total bile acid concentration, in their fasting gastric juice. The biopsy specimens were stained by the Warthin-Starry method for Campylobacter like organisms a
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17. Chronic Atrophic Gastritis in SCID Mice Experimentally Infected with Campylobacter fetus
Campylobacter fetus is a cause of enteritis and invasive extraintestinal disease in humans. In order to develop an animal model of C. fetus infection, outbred ICR SCID mice were orally challenged with a clinical isolate of C. fetus. The stomachs of SCID mice were heavily colonized with C. fetus, and colonization was associated with the development of chronic
American Society for Microbiology.
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18. Iron acquisition by Helicobacter pylori: importance of human lactoferrin.
Helicobacter pylori is known to be an etiologic agent of gastritis and peptic ulcer disease in humans. However, the mechanism by which this organism acquires iron has not been studied. For this investigation, H. pylori was grown in iron-restricted medium. Siderophore production was not detected by chemical assays, and the strains were unable to use enteroche
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19. Gastric polyposis caused by multiple carcinoids and early carcinoma.
A case of gastric polyposis caused by multiple carcinoids with concurrent gastric carcinoma is reported in a 70 year old woman with severe atrophic gastritis and intestinal metaplasia. On microscopic examination, the carcinoids and gastric carcinoma arose separately thus representing "double primaries". Long-standing hypergastrinaemia probably plays a causat
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20. Gastrin Is an Essential Cofactor for Helicobacter-Associated Gastric Corpus Carcinogenesis in C57BL/6 Mice
We have previously described a synergistic interaction between hypergastrinemia and Helicobacter felis infection on gastric corpus carcinogenesis in FVB/N mice housed under specific-pathogen-free conditions. However, gastrin-deficient (GAS-KO) mice on a mixed C57BL/6/129Sv genetic background maintained in conventional housing were reported to develop spontan
American Society for Investigative Pathology.
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21. Serum immunoreactive gastrin in rheumatoid arthritis. Further observations on its identity, clinical specificity, and relationship to gastric function.
Serum immunoreactive gastrin is raised in some patients with rheumatoid arthritis (RA). In this paper paired samples taken within 30 minutes of each other show that this phenomenon is reproducible. Dilution curves show identity between gastrin from RA patients and from patients with no RA, and the raised immunoreactive gastrin concentration is demonstrable i
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22. Enhanced Disease Severity in Helicobacter pylori-Infected Mice Deficient in Fas Signaling
Recent evidence suggests that immune-mediated gastric epithelial cell apoptosis through Fas-Fas ligand interactions participates in Helicobacter pylori disease pathogenesis. To define the role of Fas signaling in vivo, H. pylori strain SS1 infection in C57BL/6 mice was compared to that in mice deficient in the Fas ligand (gld). gld mice had a degree of gastr
American Society for Microbiology.
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23. Evaluation of Helicobacter pylori vacA genotype in Japanese patients with gastric cancer.
AIM: To examine the vacA genotypes of Helicobacter pylori strains in Japan and to define whether any specific genotype was associated with gastric cancer. METHODS: The allelic variation of vacA gene was studied using a recently introduced polymerase chain reaction based vacA genotyping system. RESULTS: 80 H pylori strains were isolated from gastric biopsies
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24. Estimation of prevalence of Helicobacter pylori infection in an asymptomatic elderly population comparing [14C] urea breath test and serology.
A non-invasive serological assay devised in this laboratory had a sensitivity and specificity of 100% as determined by culture and confirmed by histology in a group of 47 patients who had undergone endoscopy. The correlation between serology and the non-invasive [14C] breath test was very good. Only one of 24 culture positive patients was, while all 23 cultu