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Intragastric pH

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https://www.readbyqxmd.com/read/28207313/continuous-radiotelemetric-monitoring-of-intragastric-ph-in-a-dog-with-peptic-ulceration
#1
Michael B Lane, Jeanne C Larson, Jennifer E Stokes, M Katherine Tolbert
CASE DESCRIPTION A 6-year-old castrated male Boxer was evaluated for a 5-week history of frequent vomiting, melena, and signs of abdominal pain following accidental ingestion of 5 to ten 15-mg meloxicam tablets (approx ingested dose, 3.1 to 6.2 mg/kg [1.4 to 2.8 mg/lb]). CLINICAL FINDINGS Clinical signs persisted despite 3 weeks of treatment with sucralfate (41.8 mg/kg [19 mg/lb], PO, q 8 h) and omeprazole (0.8 mg/kg [0.36 mg/lb], PO, q 24 h). Results of a CBC and serum biochemical analysis were unremarkable...
March 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28163290/gastric-neuroendocrine-tumor-with-hypergastrinemia-following-type-b-chronic-atrophic-gastritis-a-case-report
#2
Eriko Yamaguchi, Tsutomu Iwasa, Eikichi Ihara, Yosuke Tomita, Akira Aso, Eiji Oki, Kayoko Nakano, Minako Hirahashi, Kazuhiko Nakamura
A man in his 60s was referred to our institution for the evaluation of a gastric neuroendocrine tumor (G-NET) located in the fornix and that measured 13mm in size. Blood test results revealed hypergastrinemia (up to 3376pg/ml). Additional tests, including esophagogastroduodenoscopy, computed tomography, and intragastric pH monitoring, indicated that hypergastrinemia was not associated with type A autoimmune gastritis or gastrinoma. The patient was positive for the immunoglobulin G antibody against Helicobacter pylori, suggesting type B chronic atrophic gastritis as the cause for the condition...
2017: Nihon Shokakibyo Gakkai Zasshi, the Japanese Journal of Gastro-enterology
https://www.readbyqxmd.com/read/28161707/pathogenesis-of-double-dose-proton-pump-inhibitor-resistant-non-erosive-reflux-disease-and-mechanism-of-reflux-symptoms-and-gastric-acid-secretion-suppressive-effect-in-the-presence-or-absence-of-helicobacter-pylori-infection
#3
Noriyuki Kawami, Nana Takenouchi, Mariko Umezawa, Shintaro Hoshino, Yuriko Hanada, Yoshimasa Hoshikawa, Hirohito Sano, Yoshio Hoshihara, Tsutomu Nomura, Eiji Uchida, Katsuhiko Iwakiri
BACKGROUND: Various mechanisms have been suggested to be responsible for contributing to the occurrence of proton pump inhibitor (PPI)-resistant non-erosive reflux disease (NERD). The aims of this study were to clarify the pathogenesis of PPI-resistant NERD. METHODS: Fifty-three patients with NERD, who had persistent reflux symptoms despite taking double-dose PPI, were included in this study. After excluding eosinophilic esophagitis (EoE) and primary esophageal motility disorder, esophageal impedance-pH monitoring was carried out...
February 4, 2017: Digestion
https://www.readbyqxmd.com/read/28138748/safety-tolerability-pharmacokinetics-and-pharmacodynamics-of-dexlansoprazole-injection-in-healthy-chinese-subjects
#4
Yue-Qi Li, Zheng-Yu Yan, Hong-Wen Zhang, Lu-Ning Sun, Hui-Wen Jiao, Mei-Feng Wang, Li-Yuan Yu, Lei Yu, Zi-Qing-Yun Yuan, Ling Meng, Yong-Qing Wang
PURPOSE: This study was conducted to evaluate the safety, tolerability, pharmacokinetics and pharmacodynamics of dexlansoprazole injection in healthy subjects. METHODS: Dexlansoprazole (20-90 mg) or lansoprazole (30 mg) was administrated intravenously to healthy male and female volunteers. All the subjects were sampled for pharmacokinetic (PK) analysis and 64 of them were monitored for 24-h intragastric pH prior to and after administration in the pharmacodynamic (PD) study...
January 31, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28125347/gastric-mixing-during-food-digestion-mechanisms-and-applications
#5
Gail M Bornhorst
Gastric mixing is a complex process that is governed by meal properties, such as food buffering capacity, physical properties, and the rate of breakdown as well as physiological factors, such as the rate of gastric secretions, gastric emptying, and gastric motility. Gastric mixing processes have been studied through the use of experimental and computational methods. Gastric mixing impacts the intragastric pH distribution and residence time in the stomach for ingested materials. Development of a fundamental understanding of the advective and diffusion processes and their roles in gastric mixing will be important in furthering our understanding of food breakdown, microbial survival, and drug dissolution during gastric digestion...
January 23, 2017: Annual Review of Food Science and Technology
https://www.readbyqxmd.com/read/28111929/acid-inhibitory-effect-of-a-combination-of-omeprazole-and-sodium-bicarbonate-cdfr0209-compared-with-delayed-release-omeprazole-40%C3%A2-mg-alone-in-healthy-adult-male-subjects
#6
Kyu-Nam Kim, Sung-Won Yang, Hyunil Kim, Seong Shin Kwak, Young-Sang Kim, Doo-Yeoun Cho
CDFR0209, a combination of an immediate-release formulation of omeprazole 40 mg and sodium bicarbonate 1100 mg, has been developed to treat acid-related disorders. We compared the acid inhibitory effects of CDFR0209 and delayed-release omeprazole (omeprazole-DR, Losec 40 mg) after repeated dosing in Helicobacter pylori-negative healthy adult male subjects. In this 2-period crossover study, 30 subjects were randomized to CDFR0209 or omeprazole-DR daily for 7 days. An ambulatory continuous 24-hour intragastric pH recording was performed at baseline and on days 1 and 7 of each administration period...
January 23, 2017: Clinical Pharmacology in Drug Development
https://www.readbyqxmd.com/read/28101705/tyrosine-kinase-inhibitors-and-proton-pump-inhibitors-an-evaluation-of-treatment-options
#7
Roelof W F van Leeuwen, Frank G A Jansman, Nicole G Hunfeld, Robert Peric, Anna K L Reyners, Alex L T Imholz, Jacobus R B J Brouwers, Joachim G Aerts, Teun van Gelder, Ron H J Mathijssen
Tyrosine kinase inhibitors (TKIs) have rapidly become an established factor in oncology, and have been shown to be effective in a wide variety of solid and hematologic malignancies. Use of the oral administration route of TKIs offers flexibility and is convenient for the patient; however, despite these advantages, the oral route of administration also causes a highly relevant new problem. Acid-inhibitory drugs, such as proton pump inhibitors (PPIs), increase the intragastric pH, which may subsequently decrease TKI solubility, bioavailability, and treatment efficacy...
January 18, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/27928793/-subtype-classification-and-clinicopathological-characteristics-of-gastric-neuroendocrine-neoplasms-an-analysis-of-241-cases
#8
Pan Zhang, Yu Zhang, Chi Zhang, Yanfen Shi, Jixi Liu, Qing Liu, Lili Yu, Miao Wang, Guoming Zou, Jie Lou, Jie Chen, Huangying Tan
OBJECTIVE: To study subtype classification of gastric neuroendocrine neoplasm (NEN) and their clinicopathological characteristics in order to provide reference for clinical practice. METHODS: Clinicopathological data of 241 gastric NEN patients (174 cases from China-Japan Friendship Hospital and 67 cases from The First Affiliated Hospital of Sun Yat-Sen University) between January 2011 and June 2016 were retrospectively summarized. According to serum gastrin, 24-hour intragastric pH monitoring and pathological grade, patients with gastric NEN were divided into 4 types: type I( (hypergastrinemia and achlorhydria, related to autoimmune chronic atrophic gastritis), type II( [hypergastrinemia and Zollinger-Ellison syndrome, related to gastrinoma or multiple endocrine neoplasia type I( (MEN-I()], type III( (sporadic disease with normal serum gastrin level), and type IIII( [poorly differentiated gastric neuroendocrine carcinoma (NEC) and mixed adenoneuroendocrine carcinoma (MANEC)]...
November 25, 2016: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/27916213/gastric-ph-and-therapeutic-responses-to-exsomeprazole-in-patients-with-functional-dyspepsia-potential-clinical-implications
#9
Marek Majewski, Irene Sarosiek, Chad J Cooper, Grzegorz Wallner, Richard W McCallum, Stanley A Edlavitch, Jerzy Sarosiek
BACKGROUND: Therapy for functional dyspepsia remains a challenge. This study aimed to evaluate esomeprazole (E) versus placebo (P) regarding (1) the effectiveness in providing relief of abdominal pain or discomfort during 16 weeks of therapy in patients with functional dyspepsia having moderate or severe symptoms; (2) the effects on gastric acid suppression and (3) the relationship between symptom relief and gastric pH. METHODS: Enrolled patients were randomized to E (n = 38) or P (n = 35) in a double-blind, placebo-controlled trial...
December 2016: American Journal of the Medical Sciences
https://www.readbyqxmd.com/read/27906465/repeated-famotidine-administration-results-in-a-diminished-effect-on-intragastric-ph-in-dogs
#10
M K Tolbert, A Graham, A Odunayo, J Price, J M Steiner, K Newkirk, S Hecht
BACKGROUND: Famotidine is an acid suppressant commonly administered to dogs. Prolonged famotidine use in people results in decreased efficacy, but the effect in dogs is unknown. HYPOTHESIS/OBJECTIVES: To compare the effect of repeated oral administration of famotidine or placebo on intragastric pH and serum gastrin in dogs. We hypothesized that famotidine would have a diminished effect on intragastric pH on day 13 compared to day 1. ANIMALS: Six healthy adult colony Beagles...
January 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/27875488/esomeprazole-fda-approval-in-children-with-gerd-exposure-matching-and-exposure-response
#11
Justin C Earp, Nitin Mehrotra, Kristina E Peters, Robert P Fiorentino, Donna Griebel, Sue Chih Lee, Andrew Mulberg, Kerstin Röhss, Marie Sandström, Amy Taylor, Christoffer W Tornøe, Erica L Wynn, Jan-Stefan Van der Walt, Christine Garnett
OBJECTIVES: FDA approval of proton-pump inhibitors for infantile GERD has been limited by intra-patient variability in the clinical assessment of GERD. For children 1-17 years old, extrapolating efficacy from adults for IV esomeprazole was accepted. The oral formulation was previously approved in children. Exposure-response and exposure matching analyses were sought to identify approvable pediatric doses. METHODS: Intragastric pH biomarker comparisons between children and adults were conducted...
November 19, 2016: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/27803732/bioavailability-safety-and-pharmacodynamics-of-delayed-release-dexlansoprazole-administered-as-two-30-mg-orally-disintegrating-tablets-or-one-60-mg-capsule
#12
Michael Kukulka, Sai Nudurupati, Maria Claudia Perez
BACKGROUND: Dual delayed-release dexlansoprazole is approved for use in adults as a 30 mg orally disintegrating tablet (ODT) or as 30 mg and 60 mg capsules. The pharmacokinetics, pharmacodynamics, and safety profile of two dexlansoprazole 30 mg ODTs were compared with one dexlansoprazole 60 mg capsule in this randomized, phase I, open-label, single-center, multiple-dose, two-period crossover study. METHODS: Participants were randomized in one of two treatment sequences, each comprised two 5-day treatment periods during which two dexlansoprazole 30 mg ODTs or one 60 mg capsule was administered once daily...
November 2016: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/27803731/pharmacokinetics-and-pharmacodynamics-of-an-orally-disintegrating-tablet-formulation-of-dexlansoprazole
#13
Michael Kukulka, Sai Nudurupati, Maria Claudia Perez
BACKGROUND: The pharmacokinetics and pharmacodynamics of a novel orally disintegrating tablet (ODT) formulation of delayed-release dexlansoprazole 30 mg was evaluated versus the dexlansoprazole 30 mg capsule in this phase I, open-label, multiple-dose, randomized, two-period crossover study. METHODS: Healthy adults received daily doses of 30 mg dexlansoprazole ODT or 30 mg dexlansoprazole delayed-release capsule for 5 days during two treatment periods, separated by a 7-day washout interval...
November 2016: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/27782887/comparison-of-the-effects-of-esomeprazole-40-mg-rabeprazole-20-mg-lansoprazole-30-mg-and-pantoprazole-40-mg-on-intragastr%C3%A4-c-ph-in-extensive-metabolizer-patients-with-gastroesophageal-reflux-disease
#14
Altay Çelebi, Dinçer Aydın, Orhan Kocaman, Buğra Tolga Konduk, Ömer Şentürk, Sadetin Hülagü
BACKGROUND/AIMS: Studies on the therapeutic efficacy of proton pump inhibitors (PPIs) in patients with gastroesophageal reflux disease (GERD) have been recently published. In most of these studies, comparison of only two PPIs have been made. There are few studies on the comparison of four or more PPIs. We aimed to compare the acid inhibitory effects of esomeprazole 40 mg, rabeprazole 20 mg, lansoprazole 30 mg, and pantoprazole 40 mg on days 1 and 5 of treatment in patients with GERD, who were extensive metabolizers in regard to the CYP2C19 genotype...
September 2016: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
https://www.readbyqxmd.com/read/27693678/gastrointestinal-dissolution-supersaturation-and-precipitation-of-the-weak-base-indinavir-in-healthy-volunteers
#15
Jari Rubbens, Joachim Brouwers, Jan Tack, Patrick Augustijns
This study investigated the impact of relevant gastrointestinal conditions on the intraluminal dissolution, supersaturation and precipitation behavior of the weakly basic drug indinavir. The influence of (i) concomitant PPI intake and (ii) the nutritional state on the gastrointestinal behavior of indinavir was assessed in order to identify the underlying mechanisms responsible for previously reported interactions. Five healthy volunteers were recruited into a crossover study containing the following arms: fasted state, fed state and fasted state with concomitant proton pump inhibitor (PPI) use...
December 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27689190/a-novel-potassium-competitive-acid-blocker-improves-the-efficacy-of-clarithromycin-containing-7-day-triple-therapy-against-helicobacter-pylori
#16
Hisatsugu Noda, Seiji Noguchi, Takashi Yoshimine, Shigeki Goji, Kazunori Adachi, Yasuhiro Tamura, Shinya Izawa, Masahide Ebi, Sayuri Yamamoto, Naotaka Ogasawara, Yasushi Funaki, Makoto Sasaki, Kunio Kasugai
BACKGROUND AND AIMS: In Japan, 7-day triple therapy for Helicobacter pylori including clarithromycin (CAM) was approved in 2000. However, antibiotic resistance subsequently reduced this rate to an unacceptable level (70%). Vonoprazan, an orally bioavailable potassium-competitive acid blocker (P-CAB), was approved in Japan in 2014. This could improve eradication rates by increasing the intragastric pH, thus increasing bacterial antibiotic susceptibility. This study compared the efficacy of 7-day triple therapies that included CAM and vonoprazan or proton pump inhibitor (PPI)...
September 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/27663505/the-gastric-acid-pocket-is-attenuated-in-h-pylori-infected-subjects
#17
David R Mitchell, Mohammad H Derakhshan, Angela A Wirz, Clare Orange, Stuart A Ballantyne, James J Going, Kenneth E L McColl
OBJECTIVE: Gastric acid secretory capacity in different anatomical regions, including the postprandial acid pocket, was assessed in Helicobacter pylori positive and negative volunteers in a Western population. DESIGN: We studied 31 H. pylori positive and 28 H. pylori negative volunteers, matched for age, gender and body mass index. Jumbo biopsies were taken at 11 predetermined locations from the gastro-oesophageal junction and stomach. Combined high-resolution pH metry (12 sensors) and manometry (36 sensors) was performed for 20 min fasted and 90 min postprandially...
September 23, 2016: Gut
https://www.readbyqxmd.com/read/27639346/resolving-the-physiological-conditions-in-bioavailability-and-bioequivalence-studies-comparison-of-fasted-and-fed-state
#18
Felix Schneider, Michael Grimm, Mirko Koziolek, Christiane Modeß, Anne Dokter, Tarek Roustom, Werner Siegmund, Werner Weitschies
In the present study temperature, pH and pressure profiles of nine healthy human volunteers were investigated after ingestion of the SmartPill® under conditions simulating the fasted state treatment in bioavailability and bioequivalence studies. In a previously published study the same subjects received the SmartPill® under fed conditions as recommended by the FDA. Since large non-digestible objects are mainly emptied during phase III of the interdigestive migrating motor complex, the gastric residence time of the SmartPill® was found to be clearly shorter under fasting conditions...
November 2016: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27628008/proton-pump-inhibitors-in-cardiovascular-disease-drug-interactions-with-antiplatelet-drugs
#19
Morten Würtz, Erik L Grove
Aspirin and P2Y12 receptor antagonists are widely used across the spectrum of cardiovascular diseases. Upper gastrointestinal complications, including ulcer and bleeding, are relatively common during antiplatelet treatment and, therefore, concomitant proton pump inhibitor (PPI) treatment is often prescribed.PPIs provide gastroprotection by changing the intragastric milieu, essentially by raising intragastric pH. In recent years, it has been heavily discussed whether PPIs may reduce the cardiovascular protection by aspirin and, even more so, clopidogrel...
September 15, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27518195/effects-of-different-omeprazole-dosing-on-gastric-ph-in-non-variceal-upper-gastrointestinal-bleeding-a-randomized-prospective-study
#20
Adam Chwiesko, Radoslaw Charkiewicz, Jacek Niklinski, Wojciech Luczaj, Elzbieta Skrzydlewska, Robert Milewski, Andrzej Baniukiewicz, Eugeniusz Wroblewski, Mariusz Rosolowski, Andrzej Dabrowski
OBJECTIVE: We aimed to identify the best method of omeprazole (OME) application with respect to intragastric pH, cytochrome P450 2C19 (CYP2C19) genotype and phenotype. METHODS: The patients with non-variceal upper gastrointestinal bleeding (NVUGIB) were prospectively enrolled. After the achievement of endoscopic hemostasis, the patients were randomized to 40-mg intravenous (i.v.) OME bolus injection every 12 h or 8-mg/h continuous i.v. infusion for 72 h after an 80-mg i...
September 2016: Journal of Digestive Diseases
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