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

Male gender and smoking have an established discriminant value of increased risk for duodenal ulcers. The present analysis is focused on whether this could be generally enhanced by considering Helicobacter pylori status in dyspeptic patients consulting their primary physician. Patients were enrolled into our Dyspepsia Study if they met the following criteria: Symptoms for minimum one month, informed consent for drug trial, including upper gastrointestinal endoscopy (UGE), if required. All were prospectively screened for criteria suggesting an organic origin of the disorder such as nocturnal pain, severe pain, severe regurgitation or heartburn, loss of weight, pain relieved by food, age > 50 years. 16% of patients had one or more relevant lesion: 7.8% oesophagitis, 8.5% duodenal ulcers, and 1.8% gastric ulcers. Of the clinical criteria enumerated only nocturnal pain and/or severe regurgitation or heartburn had a marginal discriminant power (P < 0.1). In contrast smoking and/or positive CLO-urease test had a substantial and significant (P < 0.001), discriminant value both for oesophagitis and duodenal ulcers. Patients with both a positive CLO-urease test and who smoked accounted for only 16% of the population but for 46% of the lesions, but this was only 4% for the 42% subjects who were non-smokers and had a negative CLO-urease test. Positive H. pylori status and smoking appear to have an important and probably additive discriminant value to distinguish between organic and functional dyspepsia.
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PMID:Epidemiology of dyspepsia: discriminant value of smoking and Helicobacter pylori status as predictors of peptic lesions in primary care. 944 58

A novel helicobacter with the proposed name Helicobacter cetorum, sp. nov. (type strain MIT 99-5656; GenBank accession number AF 292378), was cultured from the main stomach of two wild, stranded Atlantic white-sided dolphins (Lagenorhynchus acutus) and from the feces of three captive cetaceans (a Pacific white-sided dolphin [Lagenorhynchus obliquidens]; an Atlantic bottlenose dolphin [Tursiops truncatus]; and a beluga whale [Delphinapterus leucas]). The infected captive cetaceans were either subclinical, or clinical signs included intermittent regurgitation, inappetance, weight loss, and lethargy. Ulcers were observed in the esophagus and forestomach during endoscopic examination in two of the three captive animals. In the third animal, esophageal linear erosions were visualized endoscopically, and histopathological evaluation of the main stomach revealed multifocal lymphoplasmacytic gastritis with silver-stained spiral-shaped bacteria. Helicobacter cetorum is a fusiform gram-negative bacterium with a single bipolar flagellum. The isolates grow under microaerobic conditions at 37 and 42 degrees C but not at 25 degrees C. H. cetorum is urease, catalase, and oxidase positive, and it is sensitive to cephalothin. The isolates from the wild, stranded dolphins were sensitive to nalidixic acid, whereas the isolates from the collection animals were resistant. By 16S rRNA sequencing it was determined that H. cetorum represented a distinct taxon that clusters most closely with H. pylori. Further studies are necessary to determine the role of H. cetorum in the development of gastric ulcers and gastritis of cetaceans. This is the first description and formal naming of a novel Helicobacter species from a marine mammal.
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PMID:Helicobacter cetorum sp. nov., a urease-positive Helicobacter species isolated from dolphins and whales. 1245 48