PURPOSE: This study was undertaken to test the hypothesis that high concentrations of urea in gastric juice would have an influence on Helicobacter pylori infection in patients maintained on chronic hemodialysis (HD). MATERIAL AND METHODS: We investigated 30 patients (17 males, 13 females; mean age 50.8 +/- 2.9 years) with end-stage renal disease (ESRD) undergoing hemodialysis treatment (HD) for at least 6 months, who were compared to 31 patients (16 males, 15 females; mean age 61.3 +/- 2.2 years) with dyspeptic symptoms. Biopsies from the gastric antrum and body were taken for histological investigation. Urea and ammonia were measured in gastric juice, and the severity of gastritis was evaluated according to Sydney criteria. RESULTS: H. pylori infection was found in 19 (63%) HD patients and in 22 (71%) control subjects. Gastric juice urea concentration was significantly higher in HD patients than in controls and H. pylori infection caused a significant decrease in urea concentration in both groups. There was an inverse correlation between urea and ammonia concentration in gastric juice in both groups. Ammonia concentration in both groups was higher in H. pylori infected patients. In H. pylori negative subjects ammonia/urea ratio was lower in HD patients in comparison to controls. Ammonia/urea ratio was raised by H. pylori infection in both groups, and the difference between HD and control groups persisted. H. pylori infection was associated with polymorphonuclear infiltration of gastric mucosa. There was a significant correlation between gastric ammonia and mucosal polymorphonuclear leukocytes infiltration and gastritis score. CONCLUSIONS: Higher urea levels in the gastric juice of chronically hemodialyzed patients do not seem to be a risk factor for infection with Helicobacter pylori.
PURPOSE: This study was undertaken to test the hypothesis that high concentrations of urea in gastric juice would have an influence on Helicobacter pyloriinfection in patients maintained on chronic hemodialysis (HD). MATERIAL AND METHODS: We investigated 30 patients (17 males, 13 females; mean age 50.8 +/- 2.9 years) with end-stage renal disease (ESRD) undergoing hemodialysis treatment (HD) for at least 6 months, who were compared to 31 patients (16 males, 15 females; mean age 61.3 +/- 2.2 years) with dyspeptic symptoms. Biopsies from the gastric antrum and body were taken for histological investigation. Urea and ammonia were measured in gastric juice, and the severity of gastritis was evaluated according to Sydney criteria. RESULTS: H. pylori infection was found in 19 (63%) HDpatients and in 22 (71%) control subjects. Gastric juice urea concentration was significantly higher in HDpatients than in controls and H. pylori infection caused a significant decrease in urea concentration in both groups. There was an inverse correlation between urea and ammonia concentration in gastric juice in both groups. Ammonia concentration in both groups was higher in H. pyloriinfectedpatients. In H. pylori negative subjects ammonia/urea ratio was lower in HDpatients in comparison to controls. Ammonia/urea ratio was raised by H. pylori infection in both groups, and the difference between HD and control groups persisted. H. pylori infection was associated with polymorphonuclear infiltration of gastric mucosa. There was a significant correlation between gastric ammonia and mucosal polymorphonuclear leukocytes infiltration and gastritis score. CONCLUSIONS: Higher urea levels in the gastric juice of chronically hemodialyzed patients do not seem to be a risk factor for infection with Helicobacter pylori.
Authors: Mustafa Altay; Faruk Turgut; Hatice Akay; Mehmet Kanbay; Aysegul Babali; Ali Akcay; Murat Duranay; Ramazan Yigitoglu; Adrian Covic Journal: Int Urol Nephrol Date: 2008-01-15 Impact factor: 2.370
Authors: Julie Y Huang; Emily Goers Sweeney; Michael Sigal; Hai C Zhang; S James Remington; Michael A Cantrell; Calvin J Kuo; Karen Guillemin; Manuel R Amieva Journal: Cell Host Microbe Date: 2015-08-12 Impact factor: 31.316