Search Results
Results 301 - 350 of 1707
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Stadler M - - 2003
In the present study, gastric juice resistant tablet formulations of lactic acid bacteria (LAB) were developed, using hydroxypropylmethylcellulose acetate succinate (HPMCAS) as well as alginates, apple pectin and Metolose as matrix forming components. To optimize the formulation-using survival rate in acid medium, and disintegration time in intestinal fluid as test ...
Simrén Magnus - - 2003
Duodenal acid has been suggested to be of importance for dyspeptic symptoms. We investigated the effects of acid on duodenal mechanosensitivity and antroduodenal motility in 10 healthy subjects before and during duodenal infusion of acid (0.1 N HCl) or water by using a combined barostat-manometry assembly. During acid infusion, increased ...
Järbur K - - 2003
BACKGROUND: Interdigestive pain relieved by food is a common feature of ulcer disease. We tested the hypothesis that the duodenal bulb is intermittently acidified in association with phase III of the interdigestive motility cycle, and tried to quantify the balance between acid and duodenal bicarbonate secretion during this particular period. ...
Gardner J D - - 2003
No current methods exist to determine meal-stimulated gastric acid secretion in humans under conditions that approximate those of daily living with the ingestion of breakfast, lunch and dinner. Gastric and oesophageal pH were measured in 26 healthy subjects and in 59 subjects with gastro-oesophageal reflux disease. Meal-stimulated gastric acid secretion ...
Nadeau Jenifer A - - 2003
OBJECTIVE: To identify the pathogenesis of gastric ulcers by comparing injury to the nonglandular gastric mucosa of horses caused by hydrochloric acid (HCl) or volatile fatty acids (VFAs). SAMPLE POPULATION: Gastric tissues from 30 horses. PROCEDURE: Nonglandular gastric mucosa was studied by use of Ussing chambers. Short-circuit current (Isc) and ...
Oksala Niku K J - - 2003
AIM: In restitution after superficial injury of the gastric mucosa, the epithelial continuity is restored by cellular migration. We have shown that heat shock preconditioning inhibits restitution after superficial injury. This study investigates the effect of heat shock preconditioning on tissue proliferation and apoptosis. EXPERIMENTAL DESIGN: Paired guinea pig gastric ...
Nadeau Jenifer A - - 2003
OBJECTIVE: To identify in vitro effects of hydrochloric acid, valeric acid, and other volatile fatty acids (VFAs) on the pathogenesis of ulcers in the nonglandular portion of the equine stomach. SAMPLE POPULATION: Gastric tissues from 13 adult horses. PROCEDURE: Nonglandular gastric mucosa was studied by use of Ussing chambers. Short-circuit ...
Paul Jayaraj A - - 2003
The varying geographical prevalence of duodenal ulceration has suggested a relationship to staple diet. Previous experiments on animal peptic ulcer models showed that certain foods, particularly the lipid fraction, are ulceroprotective. This paper reports experiments on animal models further to investigate the nature of the protective substances in the most ...
Annibale B B Digestive and Liver Disease Unit, II Medical School, University La Sapienza, Roma, Italy. Cellular Ageing Centre, IDI, Roma, Italy. - - 2003
Seroepidemiological and clinical studies suggest that Helicobacter pylori may cause iron deficiency anaemia (IDA) in the absence of peptic lesions by undefined mechanisms, which still remain to be fully elucidated. Gastric acidity and ascorbic acid (AA) promote iron absorption. AA is lowered in the presence of H pylori infection. H ...
Williams M P - - 2003
The eradication of Helicobacter pylori decreases the antisecretory activity of omeprazole and lansoprazole. Rabeprazole is a potent proton pump inhibitor that may not be affected as greatly by H. pylori status. To compare the effect of H. pylori eradication on intragastric acidity and plasma gastrin during dosing with lansoprazole, omeprazole, ...
Iijima K - - 2003
BACKGROUND: Saliva contains substantial concentrations of nitrite derived from the enterosalivary recirculation of dietary nitrate. METHODS: We have investigated factors in gastric juice influencing the fate of nitrite in swallowed saliva. When nitrite (100 microM) is added to human gastric juice pH 1.5 or pH 2.5 at 37 degrees C ...
Kinoshita Yoshikazu - - 2003
Gastroesophageal reflux disease (GERD) is caused by a combination of esophageal motor dysfunction accompanied by maintained gastric acid secretion. Noninvasive medical treatment of GERD is mainly provided by inhibiting gastric acid secretion, because this is easier than restoring esophageal motor function by administration of drugs. Proton pump inhibitors (PPIs) and ...
Lindberg P - - 2003
Esomeprazole, the S-isomer of omeprazole, is the first proton pump inhibitor available for clinical use as a single isomer. It demonstrates pharmacological and clinical benefits beyond those seen with the racemic omeprazole. Esomeprazole has higher and more consistent bio-availability than omeprazole, which results in a greater area under the plasma ...
Holzer P - - 2003
Functional dyspepsia can be associated with impaired gastric relaxation in response to food intake and delayed gastric emptying. In this study, we investigated whether luminal hydrochloric acid (HCl) may reproduce these motor alterations in phenobarbital-anaesthetized rats via activation of extrinsic neural pathways. Intragastric pressure (IGP) changes induced by a 2-mL ...
Hatlebakk J G - - 2003
Gastric acid suppression is the most effective medical therapy to control acidic gastro-oesophageal reflux: individuals in whom therapy fails usually have inadequate acid suppression. Twenty-four-hour intragastric pH-metry measures the percentage of time that gastric pH is above 4 or 3, the critical thresholds for tissue damage and symptom generation in ...
Gatta Luigi - - 2003
Esomeprazole is an enantiomorph of omeprazole, which inhibits gastric acid secretion more effectively than omeprazole. As proton pump inhibitors also exert an antibacterial activity, we aimed to compare esomeprazole and omeprazole for their antimicrobial activity against Helicobacter pylori in vitro. We studied 52 H. pylori isolates obtained from gastric biopsies ...
Thomson Alan B R - - 2003
BACKGROUND AND AIMS: The acid inhibitory effect of proton pump inhibitors is reported to be greater in the presence than in the absence of an H. pylori infection. This study was undertaken to test the hypothesis that the acid inhibitory effect of omeprazole given twice a day is greater in ...
Vastyan Attila M - - 2003
INTRODUCTION: The aim of this study was to investigate the feasibility of seromuscular gastrocystoplasty (SGCP) in an animal model and to compare it to conventional gastrocystoplasty (CGCP). MATERIALS AND METHODS: CGCP and SGCP (using gastric segments without mucosa) were each performed in 6 dogs. In both procedures, two-thirds of the ...
Goel R K - - 2003
Bacopa monniera is an Indian tratidional medicine widely used to improve intellectual functions. Earlier, we had reported the prophylactic and curative effects of standardized extract of Bacopa monniera (BME) in various gastric ulcer models. The effect was due to augmentation of the defensive mucosal factors like increase in mucin secretion, ...
Edmond Laurie M - - 2003
The toxic, bacterial metabolite sulfide is implicated in ulcerative colitis. Ulcerative colitis patients taking 5-aminosalicylic acid-containing drugs have lower fecal sulfide levels than those not taking these drugs. The effects of sulfasalazine, balsalazide, olsalazine, and 5-aminosalicylic acid on sulfide production were studied in a three-stage chemostat pulsed on days 1 ...
Johnson David A - - 2003
The target goal for all acid suppressive therapy is to optimize control of intragastric pH over extended periods of time. A somewhat axiomatic paradigm has been that effective control of gastric acid production is associated with optimal outcome in acid-related diseases. The proton pump inhibitor (PPI) class of therapy has ...
McKellar Mary E - - 2003
Leaf composts were studied for their suppressive effects on Pythium ultimum sporangium germination, cottonseed colonization, and the severity of Pythium damping-off of cotton. A focus of the work was to assess the role of fatty-acid-metabolizing microbial communities in disease suppression. Suppressiveness was expressed within the first few hours of seed ...
Hosseinzadeh Hossein - - 2002
As a folk remedy, Anethum graveolens seed (dill) is used for some gastrointestinal ailments. We aimed to evaluate aqueous and ethanolic extracts of anti-ulcer and acute toxicity effects of the Anethum graveolens in mice. Gastric mucosal lesions were induced by oral administration of HCl (1 N) and absolute ethanol in ...
Mollenhauer-Rektorschek Marina - - 2002
Helicobacter pylori colonizes the antral mucosa of the human stomach. There is a controversy as to whether the microorganism is exposed to acidity in its ecological niche. In vitro, the microorganism requires urease for gastric colonization and survival at pH < 4.0. UreI encodes an acid activated urea channel enabling ...
Sachs George - - 2002
The past 25 years have seen an amazing improvement in the treatment and understanding of acid-related disorders. In particular, the introduction of selective histamine receptor antagonists and proton pump inhibitors has made the medical control of acid secretion an effective means of therapy. The demonstration that infection with Helicobacter pylori ...
Wada Shun-ichi - - 2002
The effects of theonellamide F, a marine bicyclic peptide, on vacuolar formation in cultured cells were studied. Theonellamide F induced large vacuoles in 6 types of mammalian cells. The vacuoles induced by theonellamide F in 3Y1 cells accumulated acridine orange, a fluorescent probe indicating the presence of an acidic organelle. ...
Chen Monica C - - 2002
In previous studies, we found that apical and basolateral EGF receptors (EGFR) on primary canine gastric monolayers decreased paracellular permeability, evident by increased transepithelial electrical resistance (TER) and decreased flux of [(3)H]mannitol (MF). After studying monolayers in Ussing chambers, we now report that treatment with apical, but not basolateral, EGF ...
Ozutemiz A Omer - - 2002
BACKGROUND: The intestines are the major site of zinc absorption and excretion. Reduced gastric acid secretion and elevated gastric pH is an important factor affecting intestinal mineral absorption. METHODS: Gastric pH and volume, and basal and maximal acid outputs were measured in 14 healthy volunteers. Plasma zinc levels were then ...
Guedes M M - - 2002
Centipedic acid and 12-acetoxy-hawtriwaic acid lactone, diterpenes isolated from the flower buds of Egletes viscosa (Asteraceae) were assayed for antinociceptive and gastroprotective activities in animal models of nociception and gastric ulcer. In the chemical nociception induced in mice by intraperitoneal acetic acid and subplantar formalin injections, both diterpenes (25 and ...
Leung Felix W - - 2002
Intestinal mucosal capsaicin-sensitive afferent nerves mediate, in part, the protective mesenteric hyperemia after intraduodenal acidification. Mechanisms associated the sensory neuropeptides, e.g. calcitonin gene-related peptide (CGRP), substance P, and ruthenium red-sensitive cation channels contribute to acid-induced mesenteric hyperemia, but whether they play a role in protection against acid-induced duodenal villous damage ...
Gardner J D - - 2002
BACKGROUND AND AIMS: KCNQ1 potassium channels in human gastric parietal cells are thought to be involved in gastric acid secretion. As cisapride can inhibit similar channels in other tissues and is an effective treatment for nocturnal heartburn, we examined the effects of cisapride on gastric and oesophageal acidity, gastric emptying ...
Sherwood P V - - 2002
The success of Helicobacter pylori eradication regimens depends on gastric pH, inflammation, and mucus thickness. Our aim was to investigate the effects of acid secretion, inflammation, and mucolysis on gastric antibiotic transfer. A total of 134 anaesthetised rats were given metronidazole, amoxicillin, or clarithromycin intravenously and gastric contents were aspirated ...
Wormser Uri - - 2002
In this study, the protective prophylactic and post-exposure effects of novel topical iodine preparations were demonstrated upon heat- and hydrofluoric acid-induced skin lesions in the haired guinea pig. Prophylactic treatment of thermal bums with a liquid iodine preparation resulted in statistically significant reductions of 39% and 30%, respectively, in acute ...
Meyer Albiero Adriana L - - 2002
Extracts of leaves and fruits of Sapindus saponaria L. were orally administered to rats and the parameters of gastric secretion (volume, pH and acidity) were evaluated after pylorus ligature. The inhibitory effect of the extracts on lesions induced by stress was compared to that of cimetidine. The volume and concentration ...
Annibale B - - 2002
Recent studies have suggested a relationship between Helicobacter pylori infection and various important micronutrients, including iron and vitamin B12, suggesting likely biological factors in the association between Helicobacter pylori and microcytic or macrocytic anaemia. There is some evidence that direct or indirect consequences of Helicobacter pylori gastritis on acid secretion ...
Ogülener Nuran - - 2002
Mouse gastric fundus strips were relaxed by ultraviolet light (UV) irradiation, exogenous nitric oxide (NO), isoproterenol, S-nitrosoglutathione, S-nitroso-L-cysteine and S-nitroso-N-acetyl-penicillamine. Glutathione did not affect relaxations in response to UV irradiation, exogenous NO and isoproterenol while inhibiting that with S-nitrosoglutathione. L-Cysteine inhibited responses to UV irradiation and exogenous NO, but not ...
Oderda Giuseppina - - 2002
Acid inhibition after proton pump inhibitors in children is variable, and to measure it by a noninvasive method may help to tailor treatment. To study gastric acid inhibition after a single dose of PPI, by measuring urinary acid output (UAO), which decreases as parietal cells release acid into the stomach ...
Bashir S - - 2002
BACKGROUND: Chronic hypergastrinaemia causes gastric enterochromaffin cell proliferation and carcinoid tumours. The only reliable means to diagnose enterochromaffin cell changes/carcinoids is by biopsy. AIM: To assess whether serum histamine, chromogranin A or serotonin and urinary N-methylimidazoleacetic acid or 5-hydroxyindoleacetic acid correlate with advanced enterochromaffin cell changes or gastric carcinoids in ...
Scott David R - - 2002
BACKGROUND & AIMS: Helicobacter pylori, a neutralophile, uses acid neutralization by urease to combat gastric acidity, allowing gastric colonization. Both acute and chronic acid resistance mechanisms are present. Acute mechanisms of acid adaptation could be due to surface urease, increased inner-membrane urea permeability via UreI, or both. Slower mechanisms may ...
Tho Ingunn - - 2002
A very low soluble pectin-derivative (pectinic acid, degree of methoxylation 4%) was found to be well suited as an excipient for pelletisation by extrusion/spheronisation. Formulations containing pectinic acid and lactose in the following ratios were evaluated: 99/1, 80/20, 50/50 and 20/80. The capacity as an extrusion aid was found to ...
Uesugi Takanobu - - 2002
Acid aspiration syndrome remains a potentially critical perioperative complication. We compared lafutidine, ranitidine, and rabeprazole for reduction of preoperative gastric fluid acidity and volume in elective surgery and found that these variables were minimized with a single morning dose of lafutidine 20 mg compared with ranitidine or rabeprazole. Preoperative oral ...
Jacobson Ingemar - - 2002
In the present paper we studied early acid-induced changes in the passive electrical properties of the rabbit esophageal epithelium in vivo by measurements of the transluminal potential difference (PD) during acid perfusion and by estimating the transmucosal electrical resistance (Rm) using cable analysis. Perfusion with acid (pH 1) for 45 ...
Pisegna Joseph R - - 2002
The more potent and longer-lasting inhibition of gastric acid secretion provided by proton pump inhibitors (PPIs) as compared with histamine-2-receptor antagonists is caused in large part by differences in their mechanism of action. PPIs block histamine-2-, gastrin-, and cholinergic-mediated sources of acid production and inhibit gastric secretion at the final ...
Talley N J - - 2002
Dyspepsia is a common condition in the general population but data are lacking on the benefits of effective acid inhibition with proton pump inhibitors in functional dyspepsia. The results of the large, randomised, double blind clinical trials, BOND and OPERA, the Scandinavian PILOT study, and a follow up study, ENCORE, ...
Tanaka S - - 2002
Gastroduodenal mucus may play a critical role in defending the epithelium from luminal acid and in the creation of a microenvironment suitable for H. pylori. We measured transmucus permeation of H+, HCO3-, and CO2 with an in vitro perfusion chamber through freshly harvested or partially purified porcine gastric mucin. pH ...
Widenhouse Tamara Vetro - - 2002
OBJECTIVE: To determine the effect of pH with or without pepsin or taurocholic acid on the bioelectric properties of gastric squamous mucosa in horses. SAMPLE POPULATION: Gastric tissues obtained from 16 adult horses that did not have evidence of gastric disease. PROCEDURE: Bioelectric properties of squamous mucosa were determined, using ...
Waldum Helge L - - 2002
After Helicobacter pylori eradication was introduced and largely eliminated the need for maintenance therapy for peptic ulcer disease, gastroesophageal reflux disease (GERD) became the main indication for prolonged gastric acid inhibition. The drug effect on GERD depends on the degree of acid inhibition, thus the efficacious proton pump inhibitors are ...
Livingston Edward H - - 2002
Acid induced duodenal injury occurs immediately following exposure to strong acid but does not worsen despite continuous perfusion with the acid. A thick gelatinous cap is found overlying the duodenum when examined histologically. The purpose of this study was to quantitate the resistance to acid diffusion by native duodenal mucus ...
Tashima Kimihito - - 2002
BACKGROUND: Acid back-diffusion activates capsaicin-sensitive sensory neurons (CSN), leading to gastric hyperemic response. We examined the role of vanilloid type-1 receptor (VR1) in gastric hyperemic and ulcerogenic responses in rat stomach following exposure to taurocholate (TC). MATERIAL/METHODS: Under urethane anesthesia, a rat stomach was mounted on an ex-vivo chamber, perfused ...
Pafumi Yan - - 2002
In the human stomach, gastric lipase hydrolyzes only 10 to 30% of ingested triacylglycerols because of an inhibition process induced by the long chain free fatty acids generated, which are mostly protonated at gastric pH. The aim of this work was to elucidate the mechanisms by which free fatty acids ...
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