Effects of astragaloside IV on the pharmacokinetics of omeprazole in rats.

This study investigates the effects of AS-IV on the pharmacokinetics of omeprazole in rats. Materials and methods: The pharmacokinetics of orally administered omeprazole (2 mg/kg), with or without AS-IV (100 mg/kg/day for 7 days) pretreatment, were investigated in male Sprague-Dawley rats (two groups of six animals each) using LC-MS/MS. A Caco-2 cell transwell model and rat liver microsome incubation systems were also used to support the in vivo pharmacokinetic data and investigate its potential mechanism. Results: The results indicated that co-administration of AS-IV could decrease the systemic exposure of omeprazole significantly (p 
Source: Pharmaceutical Biology - Category: Drugs & Pharmacology Tags: Pharm Biol Source Type: research

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In this study, a specific and sensitive LC-MS/MS method has been developed and validated, for the quantification of ilaprazole enantiomers in the rat plasma, using R-lansoprazole as the internal standard. The enantioseparation was achieved on a CHIRALPAK AS-RH column (4.6 mm × 150 mm, i.d. 5 μm), with a mobile phase composed of 10 mM ammonium acetate aqueous solution and acetonitrile (60:40, v/v), at a flow-rate of 0.5 mL/min. The method was validated over the concentration range of 0.5–300 ng/mL for both, R- and S -ilaprazole. The lower limit of quantification was 0.5 ng/mL for both enanti...
Source: Journal of Pharmaceutical Analysis - Category: Drugs & Pharmacology Source Type: research
ConclusionThe questioning skill of the  community pharmacists in this setting was poor. Few community pharmacists diagnosed the pseudo-patients’ minor ailment correctly. Also, recommendations were mostly inappropriate compared with the standard treatment guideline.
Source: International Journal of Clinical Pharmacy - Category: Drugs & Pharmacology Source Type: research
In conclusion, an enzymatic synthesis of 5’-OH tenatoprazole, a major human metabolite of tenatoprazole, was developed by using mutants of CYP102A1 from Bacillus megaterium as a biocatalyst and tenatoprazole as a substrate.Graphical abstract
Source: Process Biochemistry - Category: Biochemistry Source Type: research
Authors: Ishtiaq R, Wilhelm DM, Ahmad S Abstract CMV infections are asymptomatic in immunocompetent patients but in immunocompromised patients, CMV infections have varying manifestations depending on their location. Patient who are organ transplant recipients, taking immunosuppressive therapy for a long time are at increased risk of CMV infections. CMV induced gastric ulcer is very rare but many cases have been reported in the literature. No case describing association between CMV related gastric ulcer and glomerulonephritis has not been reported in the literature so far. In this manuscript, we describe a case of p...
Source: Postgraduate Medicine - Category: Internal Medicine Tags: Postgrad Med Source Type: research
The role of histamine H3 receptors (H3Rs) in the regulation of gastroprotection and production of prostaglandin E2 (PGE2) as well as somatostatin remains contradictory. Therefore, the effects of the H3R antagonist/inverse agonist M39 on in vivo acidified ethanol-induced gastric ulcers and gastric acid secretion in the C57BL/6 mice were assessed. Results showed that acute systemic administration of H3R agonist (R)-α-methylhistamine (RAMH, 100 mg/kg, i.g.) significantly reduced the severity of ulcer index, increased gastric acid output, and increased mucosal PGE2 production without any alteration of somatostatin concen...
Source: Frontiers in Pharmacology - Category: Drugs & Pharmacology Source Type: research
In this study, we analyzed the role of the NLRC4 inflammasome during H. pylori infection. Our results indicate that NLRC4 and a functional type IV secretion system are crucial for the production of IL-18 from human and murine gastric epithelial cells. In vivo, Nlrc4-/- mice failed to produce gastric IL-18 upon H. pylori infection. Compared with wild type mice, Nlrc4-/- mice controlled H. pylori better without showing strong inflammation. Moreover, H. pylori-induced IL-18 inhibits β-defensin 1 expression in a NF-κB-dependent manner, resulting in higher bacterial colonization. At the same time, inflammasome activa...
Source: Journal of Immunology - Category: Allergy & Immunology Authors: Tags: J Immunol Source Type: research
Publication date: November 2019Source: Human Pathology: Case Reports, Volume 18Author(s): Yiqin Xiong, Michelle X. YangAbstractPrimary gastric choriocarcinoma (PGC) is a rare gastric malignancy that accounts for
Source: Human Pathology: Case Reports - Category: Pathology Source Type: research
FINDINGSOne in eight older adults was prescribed proton pump inhibitor drugs, which are used to treat gastric ulcers or to prevent gastrointestinal bleeding in those taking blood thinners. About 36 percent of those prescriptions were potentially unnecessary, a study found, primarily because people took them far longer than the often-recommended eight weeks.BACKGROUNDOlder Americans frequently receive  low-value care, which is care that has no net benefit to the individual and has the potential to harm them. Low-value care contributes significantly to higher health costs. Most people are unaware of the potential toxici...
Source: UCLA Newsroom: Health Sciences - Category: Universities & Medical Training Source Type: news
AbstractBioactivity-guided investigation of the methanol extract ofCrepis sancta aerial parts, collected off Al-Tafilah, South Jordan, was applied, and in this study, the extract was explored for its phytochemical components and in vivo antiulcer activity. In addition, a docking study involving the purified compounds with the newly crystalized gastric proton pump (PDB # 5YLU) was performed. In-depth phytochemical investigation using the state-of-the-art chromatographic and analytical techniques was implemented resulting in the identification of two eudesmane-type sesquiterpenoids, 3-oxo-γ-costic acid (1) and its meth...
Source: Inflammopharmacology - Category: Drugs & Pharmacology Source Type: research
Publication date: Available online 23 August 2019Source: Carbohydrate PolymersAuthor(s): Juliane Carlotto, Daniele Maria-Ferreira, Lauro Mera de Souza, Bruna Barbosa da Luz, Jorge Luiz Dallazen, Maria Fernanda de Paula Werner, Thales Ricardo CiprianiAbstractA polysaccharide fraction from Handroanthus heptaphyllus leaves was obtained with a simple and quick purification method. Methylation analysis and NMR spectroscopy indicated the presence of a complex polysaccharide fraction mainly constituted by a type II arabinogalactan. This is the first report in literature on structural elucidation of polysaccharides of species from...
Source: Carbohydrate Polymers - Category: Biomedical Science Source Type: research
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