Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:6.3.4.6 (urease)
 7,490 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Peptic ulcer lesions are the most frequent cause of upper gastrointestinal bleeding and are responsible for more than 50 per cent of cases. Several etiologic factors of peptic ulcer are known, the principle one being Helicobacter pylori (H. pylori). Recent studies indicate that H. pylori eradication is associated with the marked reduction in rebleeding rate. In peptic ulcer bleeding which requires surgical intervention, knowledge H. pylori status may help to determine the choice of procedure (simple sewing in H. pylori positive patients vs full-blown ulcer surgery in H. pylori negative patients). We suggest to use the invasive combination of histology and biopsy-rapid urease test in stable bleeding peptic ulcer patients without coagulopathy for H. pylori diagnosis. Cases with positive result do not need further investigation for H. pylori diagnosis. If negative, the serology test was suggested to confirm the absence of H. pylori. However, in unstable patients, the serology test seem to effectively detect H. pylori infection.
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PMID:Diagnosis method of Helicobacter pylori infection in bleeding peptic ulcer. 1218 99

The aim of the study was to demonstrate the sensitivity, specificity and accuracy of gastric juice urease test and brushing-urease test compared to the biopsy-urease test for Helicobacter pylori (H. pylori) detection. For each patient, two milliliters of gastric juice was collected and one milliliter in the supernatant was tested for rapid urease reactions. One gastric mucus brushing and two biopsies were taken from the body and the antrum. The brushing specimens were tested for rapid urease reaction by shaking the brush into the urea broth. The gold standards for diagnosing of H. pylori are positive H. pylori upon specimen culture or positive identification of H. pylori from polymerase chain reaction (PCR) assay using primer for vac A gene. Forty patients were enrolled in the study including ten patients with gastric ulcer, six patients with duodenal ulcer and twenty four patients with non-ulcer dyspepsia. Brushing-urease test and biopsy-urease test were not different sensitivity (87.50% vs 93.20%), specificity (100% vs 100%) and accuracy (90.25% vs 95.50%). The gastric juice urease test had a sensitivity of 65.25 per cent, specificity of 100 per cent and accuracy of 75 per cent for detecting of H. pylori infection. In conclusion, gastric juice urease test had low sensitivity in the diagnosis of H. pylori infection. Brushing-urease test is as accurate as biopsy-urease test in detecting H. pylori infection. However, the brushing method had lower gastric tissue injury than the biopsy and so should be used for detecting H. pylori infection in patients with coagulopathy.
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PMID:Gastric juice urease test and brushing urease test for Helicobacter pylori detection. 1218 55