Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0038358 (gastric ulcer)
 5,179 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The effects of aspirin, salicylate formulations and substitutes, smoking (nicotine), indomethacin, corticosteroids, phenylbutazone, ethanol, caffeine and reserpine on the gastric mucosa are discussed. The damaging effects of the drugs are considered in terms of the gastric mucosal barrier, gastric erosions, microbleeding and haematemesis and melaena and finally whether they cause peptic ulcer. There is suggestive evidence that unbuffered aspirin is a cause of haematemesis and melaena and of gastric ulcer but the incidence rates for hospital admission are low, being 10 to 15 per 100,000 heavy users per year. Aspirin in solution as acetylsalicylate buffered to maintain a neutral pH protects against gastric damage. Newer aspirin substitutes (mefenamic acid, fenoprofen, naproxen, tolmetin and ibuprofen) appear to cause less faecal blood loss than aspirin but their long-term effects have not been fully evaluated. Smoking is definitely associated with peptic ucler but the mechanism is unknown. Corticosteroids are probably not ulcerogenic despite clinical bias that they are. Indomethacin and phenylbutazone may be ulcerogenic but there is insufficient evidence to make firm judgements. Ethanol, caffeine and reserpine, on available evidence, are probably not ulcerogenic.
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PMID:Drugs and gastric damage. 126 29

The efficacy of misoprostol (a synthetic analogue of prostaglandin E1) and cimetidine in the treatment of gastric ulcer was evaluated. Thirty-two patients with endoscopically proven gastric ulcer were randomized, in a double-blind manner, in one of three groups that received four daily doses of either misoprostol, 50 or 200 micrograms, or cimetidine, 300 mg. Ulcer healing was assessed endoscopically after 4 weeks of treatment. The three groups were fairly comparable in their alcohol and caffeine intake, previous ulcer history and ulcer size. A relatively high proportion of patients in the cimetidine-treated group was smokers. Only one patient was withdrawn from the study. On the misoprostol low dose, healing of the ulcer was observed in 20% of the patients. In contrast, healing on the high dose of misoprostol (70%) was not significantly different from that on cimetidine (73%). No important clinical side effects were observed in any of the patients. These results (part of a multicenter, international study) suggest that the divided daily dose of 800 micrograms misoprostol is safe and effective in the short-term treatment of gastric ulcer.
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PMID:Comparison of misoprostol and cimetidine in the treatment of gastric ulcer. 393 20

Pregnant rats were given caffeine (0.0%, 0.017%, 0.034% or 0.05%) in their drinking water throughout gestation. Offspring were cross-fostered to non-caffeine-treated mothers at birth. A dose-related increase in offspring mortality was observed at 24 hr and at 10 days post partum. Prenatal caffeine exposure did not significantly influence open-field ambulation or defecation when tested at 48, 68, or 196 days of age. A significant dose-related increase in restraint-stress gastric ulcer susceptibility was detected at 200 days of age. Offspring from rats treated with 0.05% caffeine during pregnancy, developed significantly more frequent and significantly more severe gastric lesions than did offspring from control rats or from rats prenatally exposed to 0.017% and 0.034% caffeine. Prenatal caffeine exposure may: (1) predispose organisms to increased gastric disease susceptibility as adults and (2) interfere with neonatal feeding ability and thereby produce infant mortality.
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PMID:Effects of prenatal caffeine administration on offspring mortality, open-field behavior and adult gastric ulcer susceptibility. 400 Mar 67

Tea polyphenolics such as catechins are known to have the potential to inhibit many bacterial pathogens. Helicobacter pylori has been identified as an etiologic agent in the development of gastric ulcer, peptic ulcer, gastritis, and many other stomach-related diseases. In this study, we investigated the effect of 9 tea extracts--3 different brands representing 4 different processed types (white, green, oolong, and black)--on the inhibition of H. pylori. Extraction times of 2 and 5 minutes were compared. Most 5-minute extracts showed H. pylori inhibition, whereas 2-minute extracts only of Choice darjeeling black and Tazo white showed inhibition. No recovery was observed after the addition of 0.5 and 5 mM proline, indicating that tea polyphenols do not inhibit H. pylori by inhibition of proline oxidation via proline dehydrogenase. Extracts that showed inhibition were further evaluated for their effect on beneficial lactic acid bacteria. None of the samples showed inhibition, suggesting that tea might be able to inhibit H. pylori without affecting the beneficial lactic acid bacteria. High-performance liquid chromatography indicated the presence of gallic acid, quercetin, caffeine, and tea catechins (including catechin, epicatechin, and epigallocatechin) in all the tea samples. Our study indicates that tea can be potentially used as a low-cost dietary support to combat H. pylori-linked gastric diseases without affecting the beneficial intestinal bacteria.
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PMID:Inhibitory potential of tea polyphenolics and influence of extraction time against Helicobacter pylori and lack of inhibition of beneficial lactic acid bacteria. 2166 84

Probably due to caffeine-induced gastric acid secretion, negative effects of coffee upon various upper-gastrointestinal diseases have been precariously accepted, despite the inadequate epidemiological evidence. Our aim is to evaluate the effect of coffee consumption on four major acid-related diseases: gastric ulcer (GU), duodenal ulcer (DU), reflux esophagitis (RE), and non-erosive reflux disease (NERD) based on the large-scale multivariate analysis. Of the 9,517 healthy adults, GU, DU, and RE were diagnosed by endoscopy, and NERD was diagnosed by the symptoms of heartburn and regurgitation without esophageal erosion. Associations between coffee consumption and the four disorders were evaluated, together with age, gender, body mass index (BMI), Helicobacter pylori (HP) infection status, pepsinogen I/II ratio, smoking, and alcohol. We further performed meta-analysis using the random effects model to redefine the relationship between coffee intake and peptic ulcer disease. The eligible 8,013 study subjects comprised of 5,451 coffee drinkers and 2,562 non-coffee drinkers. By univariate analysis, age, BMI, pepsinogen I/II ratio, smoking, and alcohol showed significant associations with coffee consumption. By multiple logistic regression analysis, positively correlated factors with significance were HP infection, current smoking, BMI, and pepsinogen I/II ratio for GU; HP infection, pepsinogen I/II ratio, and current smoking for DU; HP non-infection, male, BMI, pepsinogen I/II ratio, smoking, age, and alcohol for RE; younger age, smoking, and female for NERD. The meta-analyses could detect any association of coffee consumption with neither GU nor DU. In conclusion, there are no significant relationship between coffee consumption and the four major acid-related upper gastrointestinal disorders.
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PMID:No association of coffee consumption with gastric ulcer, duodenal ulcer, reflux esophagitis, and non-erosive reflux disease: a cross-sectional study of 8,013 healthy subjects in Japan. 2377 88