keyword
MENU ▼
Read by QxMD icon Read
search

Intragastric pH

keyword
https://www.readbyqxmd.com/read/29411268/a-phase-1-pharmacokinetic-study-of-cysteamine-bitartrate-delayed-release-capsules-following-oral-administration-with-orange-juice-water-or-omeprazole-in-cystinosis
#1
Danielle Armas, Robert J Holt, Nils F Confer, Gregg C Checani, Mohammad Obaidi, Yuli Xie, Meg Brannagan
INTRODUCTION: Cystinosis is a rare, metabolic, autosomal recessive, genetic lysosomal storage disorder characterized by an accumulation of cystine in various organs and tissues. Cysteamine bitartrate (CB) is a cystine-depleting aminothiol agent approved in the United States and Europe in immediate-release and delayed-release (DR) formulations for the treatment of nephropathic cystinosis in children and adults. It is recommended that CBDR be administered with fruit juice (except grapefruit juice) for maximum absorption...
February 6, 2018: Advances in Therapy
https://www.readbyqxmd.com/read/29193126/pharmacokinetics-and-pharmacodynamics-of-azeloprazole-sodium-a-novel-proton-pump-inhibitor-in-healthy-japanese-volunteers
#2
Ryoko Toda, Masanari Shiramoto, Emi Komai, Kazuyoshi Yoshii, Masamichi Hirayama, Yoshihiro Kawabata
The pharmacokinetics (PK) and pharmacodynamics (PD) of proton pump inhibitors differ among cytochrome P450 (CYP) 2C19 genotypes. Therefore, we developed azeloprazole sodium (Z-215), a novel proton pump inhibitor, whose metabolism is not affected by CYP2C19 activity in vitro. However, the PK and PD of azeloprazole sodium have not been evaluated in Japanese subjects. We conducted an open-label, crossover study in healthy Japanese male volunteers to evaluate the plasma concentration and intragastric pH with respect to CYP2C19 genotype after repeated administration of 10, 20, and 40 mg azeloprazole sodium and 10 and 20 mg rabeprazole sodium (rabeprazole)...
November 28, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29167917/safety-pharmacokinetics-and-pharmacodynamics-of-s-pantoprazole-sodium-injections-after-single-and-multiple-intravenous-doses-in-healthy-chinese-subjects
#3
Hui-Wen Jiao, Lu-Ning Sun, Yue-Qi Li, Lei Yu, Hong-Wen Zhang, Mei-Feng Wang, Li-Yuan Yu, Zi-Qing-Yun Yuan, Li-Jun Xie, Juan Chen, Ling Meng, Xue-Hui Zhang, Yong-Qing Wang
PURPOSE: The objective of this study was to evaluate the safety, pharmacokinetics, and pharmacodynamics of S-(-)-pantoprazole (PPZ) sodium injections following single and multiple intravenous doses in healthy Chinese subjects. METHODS: The dosage groups were set as followed: 20 mg of single and multiple intravenous administration of S-(-)-PPZ, 40 mg of single and multiple intravenous administration of S-(-)-PPZ or pantoprazole, and 80 mg of single dosage group of S-(-)-PPZ...
November 22, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/29074349/structure-optimization-of-tetrahydropyridoindole-based-aldose-reductase-inhibitors-improved-their-efficacy-and-selectivity
#4
Magdalena Majekova, Jana Ballekova, Marta Prnova, Milan Stefek
In our previous study, tetrahydropyridoindoles carboxymethylated in position 8 were identified as aldose reductase (ALR2) inhibitors with mild efficacy and selectivity yet with significant antioxidant activity. In the present study we proceeded with optimization of the tetrahydropyridoindole scaffold by shifting the carboxymethyl pharmacophore from position 8 to position 5, with the aim to improve the biological activity. Commercial databases were screened for the presence of tetrahydropyridoindoles carboxymethylated in position 5 and an experimental set of eight compounds was created...
December 15, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29018343/impact-of-gastric-h-k-atpase-rs2733743-on-the-intragastric-ph-values-of-dexlansoprazole-injection-in-chinese-subjects
#5
Lu-Ning Sun, Yang Cao, Yue-Qi Li, Yun-Qian Fang, Hong-Wen Zhang, Mei-Feng Wang, Li-Jun Xie, Juan Chen, Zhi-Cheng Yang, Ming-Liang Bian, Hao Li, Pei-Pei Zhang, Ji-Fu Wei, Ling Meng, Xue-Hui Zhang, Ping Zhao, Yong-Qing Wang
Background: Not all patients with acid-related disorders receiving proton pump inhibitor (PP) treatment get adequate gastric pH control. The genetic variation of receptors, metabolic enzymes, and transporters are known to cause failures of therapies. We have conducted a study to evaluate the influence of gastric H + /K + -ATPase, CYP2C19 , and ABCB1 polymorphisms on the pharmacokinetic and pharmacodynamic profiles of dexlansoprazole injection in healthy Chinese subjects. Methods: A total of 51 subjects were enrolled for pharmacokinetic and pharmacodynamic study after a single intravenous administration of 20 or 30 mg dexlansoprazole...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28993985/gastroesophageal-reflux-after-sleeve-gastrectomy-a-prospective-mechanistic-study
#6
Muriel Coupaye, Caroline Gorbatchef, Daniela Calabrese, Ouidad Sami, Simon Msika, Benoit Coffin, Séverine Ledoux
BACKGROUND: Evolution of gastroesophageal reflux disease (GERD) after sleeve gastrectomy (SG) is controversial. Some authors report worsening or improvement of preoperative GERD, others the occurrence of de novo GERD between 5 and 69%. AIMS: The aims of this study are to evaluate the evolution of GERD after SG by ambulatory 24-h pH monitoring (APM) and to determine pre- and postoperative clinical and manometric factors associated with its evolution. METHODS: Between 2013 and 2015, 47 patients operated in our center performed APM before and 1 year (14...
October 9, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/28986609/comparison-of-effect-of-an-increased-dosage-of-vonoprazan-versus-vonoprazan-plus-lafutidine-on-gastric-acid-inhibition-and-serum-gastrin
#7
Takahiro Suzuki, Takuma Kagami, Takahiro Uotani, Mihoko Yamade, Yasushi Hamaya, Moriya Iwaizumi, Satoshi Osawa, Ken Sugimoto, Hiroaki Miyajima, Takahisa Furuta
BACKGROUND: Vonoprazan, a novel potassium-competitive acid blocker, elicits potent acid inhibition and hypergastrinemia at a dose of 20 mg. Its recommended maintenance dose for gastro-esophageal reflux disease is 10 mg, which is sometimes insufficient for preventing nocturnal acid breakthrough (NAB). Concomitant use of a histamine 2 receptor antagonist (H2 RA) is effective for NAB. However, further acid inhibition by addition of H2RA has concern of hypergastrinemia again. Lafutidine (H2RA) is known to stimulate somatostatin release...
January 2018: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28943870/gastrointestinal-tract-as-entry-route-for-hantavirus-infection
#8
Peter T Witkowski, Casey C Perley, Rebecca L Brocato, Jay W Hooper, Christian Jürgensen, Jörg-Dieter Schulzke, Detlev H Krüger, Roland Bücker
Background: Hantaviruses are zoonotic agents that cause hemorrhagic fevers and are thought to be transmitted to humans by exposure to aerosolized excreta of infected rodents. Puumala virus (PUUV) is the predominant endemic hantavirus in Europe. A large proportion of PUUV-infected patients suffer from gastrointestinal symptoms of unclear origin. In this study we demonstrate that PUUV infection can occur via the alimentary tract. Methods: We investigated susceptibility of the human small intestinal epithelium for PUUV infection and analyzed the resistance of virions to gastric juice...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28894373/curcumin-inhibits-apoptosis-by-modulating-bax-bcl-2-expression-and-alleviates-oxidative-stress-in-testes-of-streptozotocin-induced-diabetic-rats
#9
Lingling Zhao, Qianru Gu, Lanting Xiang, Xidan Dong, Huimin Li, Jinyao Ni, Li Wan, Guoping Cai, Guorong Chen
SCOPE: The present study was designed to examine the damage caused by high-fat diet and streptozotocin-induced diabetes on the testis of rats and the effects of curcumin against oxidative stress and apoptosis from high-fat diet and diabetes. METHODS: Diabetes was induced by intraperitoneal injection of streptozotocin (30 mg/kg in 0.1 M sodium citrate buffer, pH 4.5) in obese rats. The rats in the obese and diabetic groups were treated with a daily dose of curcumin by intragastric intubation (100 mg/kg body weight) for 8 weeks...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28881892/influence-of-esophagectomy-on-the-gastroesophageal-reflux-in-patients-with-esophageal-cancer
#10
D Kim, Y W Min, J G Park, H Lee, B-H Min, J H Lee, P-L Rhee, J J Kim, J I Zo
This study aims to assess the influence of esophagectomy with gastric transposition on the gastroesophageal reflux (GER) and gastric acidity in patients with esophageal cancer. Data on 53 esophageal cancer patients who underwent 24-hour impedance-pH monitoring after esophagectomy were retrospectively analyzed. We used a solid-state esophageal pH probe in which the esophageal pH sensor is placed 1.5 cm distal to the upper esophageal sphincter and the gastric pH sensor is located 15 cm distal to the esophageal pH channel...
December 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28655978/early-effect-on-intragastric-ph-of-oral-administration-of-rabeprazole-with-mosapride-compared-with-rabeprazole-alone
#11
Hiroshi Iida, Megumi Kaai, Yumi Inoh, Kenji Kanoshima, Kanji Ohkuma, Takashi Nonaka, Koji Fujita, Tomonori Ida, Akihiko Kusakabe, Shin Maeda, Atsushi Nakajima, Masahiko Inamori
BACKGROUND: An ideal medication for acid-related diseases would offer prompt stopping of blood flow as well as efficient symptom resolution. The aim of this study was to investigate the gastric acid suppression potency of a single oral dose of rabeprazole alone, compared with administration of rabeprazole plus mosapride. METHODS: Twelve male volunteers, Helicobacter pylori (H. pylori)-negative, participated in this randomized, three-way crossover study. After a single oral administration of rabeprazole, rabeprazole with mosapride, or rabeprazole administered 1 h after mosapride, we monitored their intragastric pH constantly for 6 h...
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28543183/a-novel-k-competitive-acid-blocker-yh4808-sustains-inhibition-of-gastric-acid-secretion-with-a-faster-onset-than-esomeprazole-randomised-clinical-study-in-healthy-volunteers
#12
S Yi, H Lee, S B Jang, H M Byun, S H Yoon, J-Y Cho, I-J Jang, K-S Yu
BACKGROUND: YH4808, a K(+) -competitive acid blocker, is under clinical development for the treatment of acid-related disorders, such as gastroesophageal reflux disease. AIMS: We aimed to determine the safety, tolerability, pharmacokinetics (PK), and pharmacodynamics (PD) of YH4808, compared to placebo and esomeprazole. METHODS: This double-blind, randomised, placebo- and active comparator (esomeprazole)-controlled study was conducted with 123 healthy male volunteers...
May 21, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28442261/identification-of-a-novel-fluoropyrrole-derivative-as-a-potassium-competitive-acid-blocker-with-long-duration-of-action
#13
Haruyuki Nishida, Yasuyoshi Arikawa, Keizo Hirase, Toshihiro Imaeda, Nobuhiro Inatomi, Yasunobu Hori, Jun Matsukawa, Yasushi Fujioka, Teruki Hamada, Motoo Iida, Mitsuyoshi Nishitani, Akio Imanishi, Hideo Fukui, Fumio Itoh, Masahiro Kajino
With the aim to find a novel long-lasting potassium-competitive acid blocker (P-CAB) that would perfectly overcome the limitations of proton pump inhibitors (PPIs), we tried various approaches based on pyrrole derivative 1b as a lead compound. As part of a comprehensive approach to identification of a new drug, we explored excellent compounds that have low lipophilicity by introducing a polar hetero-aromatic group at position 5 of the pyrrole ring. Among the compounds synthesized, fluoropyrrole derivative 37c, which has a 2-F-3-Py group at the fifth position, lower pKa , and much lower ClogP and logD values than 1b dose, showed potent gastric-acid suppressive action resulting from gastric H+ ,K+ -ATPase inhibition in animal models...
July 1, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28407418/pharmacokinetics-and-acid-suppressant-efficacy-of-esomeprazole-after-intravenous-oral-and-subcutaneous-administration-to-healthy-beagle-dogs
#14
RANDOMIZED CONTROLLED TRIAL
J-H Hwang, J-W Jeong, G-H Song, T-S Koo, K-W Seo
BACKGROUND: Esomeprazole is an S-enantiomer of omeprazole that has favorable pharmacokinetics and efficacious acid suppressant properties in humans. However, the pharmacokinetics and effects on intragastric pH of esomeprazole in dogs have not been reported. OBJECTIVE: To determine the pharmacokinetics of esomeprazole administered via various routes (PK study) and to investigate the effect of esomeprazole on intragastric pH with a Bravo pH monitoring system (PD study)...
May 2017: Journal of Veterinary Internal Medicine
https://www.readbyqxmd.com/read/28395823/gastric-toxicity-involving-alterations-of-gastritis-related-protein-expression-in-mice-following-long-term-exposure-to-nano-tio2
#15
Fashui Hong, Nan Wu, Yingjun Zhou, Li Ji, Ting Chen, Ling Wang
Nano TiO2 has been widely used in food industry as a coloring agent, whether the application has adverse effects on stomach for humans and animals is rarely concerned. This study determined whether intragastric administration with nano TiO2 every day for nine months cause gastric damages and dysfunction, and is associated with changes of stomach damage-related protein expression in mice. Our results suggested that nano TiO2 exposure resulted in significant titanium accumulation in the stomach, reductions in daily food intake and water intake, stomach weight, and stomach indices...
May 2017: Food Research International
https://www.readbyqxmd.com/read/28387464/a-novel-ph-controlled-hydrogen-sulfide-donor-protects-gastric-mucosa-from-aspirin-induced-injury
#16
Chun-Tao Yang, Zhen-Zhen Lai, Ze-Hang Zheng, Jian-Ming Kang, Ming Xian, Rui-Yu Wang, Kun Shi, Fu-Hui Meng, Xiang Li, Li Chen, Hui Zhang
Hydrogen sulphide (H2 S) serves as a vital gastric mucosal defence under acid condition. Non-steroidal anti-inflammatory drugs (NSAIDs) are among widely prescribed medications with effects of antipyresis, analgesia and anti-inflammation. However, their inappropriate use causes gastric lesions and endogenous H2 S deficiency. In this work, we reported the roles of a novel pH-controlled H2 S donor (JK-1) in NSAID-related gastric lesions. We found that JK-1 could release H2 S under mild acidic pH and increase solution pH value...
October 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28363598/p-p-methoxyl-diphenyl-diselenide-loaded-polymeric-nanocapsules-are-chemically-stable-and-do-not-induce-toxicity-in-mice
#17
Marcel Henrique Marcondes Sari, Luana Mota Ferreira, Vanessa Angonesi Zborowski, Paulo Cesar Oliveira Araujo, Verônica Ferrari Cervi, César Augusto Brüning, Letícia Cruz, Cristina Wayne Nogueira
Organoselenium compounds have been targeted to new therapeutic tools development due to their pharmacological actions. However, some toxicity issues and physicochemical limitations delay the clinical application of these compounds. The incorporation of organoselenium molecules into nanostructured systems arises as a promising alternative to overcome such restrictions. The current study proposed the characterization of the polymeric nanocapsules of p,p'-methoxyl-diphenyl diselenide [(OMePhSe)2] as well as the evaluation of the in vivo toxicity and biodistribution profile...
March 28, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28279347/helicobacter-pylori-adapts-to-chronic-infection-and-gastric-disease-via-ph-responsive-baba-mediated-adherence
#18
Jeanna A Bugaytsova, Oscar Björnham, Yevgen A Chernov, Pär Gideonsson, Sara Henriksson, Melissa Mendez, Rolf Sjöström, Jafar Mahdavi, Anna Shevtsova, Dag Ilver, Kristof Moonens, Macarena P Quintana-Hayashi, Roman Moskalenko, Christopher Aisenbrey, Göran Bylund, Alexej Schmidt, Anna Åberg, Kristoffer Brännström, Verena Königer, Susanne Vikström, Lena Rakhimova, Anders Hofer, Johan Ögren, Hui Liu, Matthew D Goldman, Jeannette M Whitmire, Jörgen Ådén, Justine Younson, Charles G Kelly, Robert H Gilman, Abhijit Chowdhury, Asish K Mukhopadhyay, G Balakrish Nair, Konstantinos S Papadakos, Beatriz Martinez-Gonzalez, Dionyssios N Sgouras, Lars Engstrand, Magnus Unemo, Dan Danielsson, Sebastian Suerbaum, Stefan Oscarson, Ludmilla A Morozova-Roche, Anders Olofsson, Gerhard Gröbner, Jan Holgersson, Anders Esberg, Nicklas Strömberg, Maréne Landström, Angela M Eldridge, Brett A Chromy, Lori M Hansen, Jay V Solnick, Sara K Lindén, Rainer Haas, Andre Dubois, D Scott Merrell, Staffan Schedin, Han Remaut, Anna Arnqvist, Douglas E Berg, Thomas Borén
The BabA adhesin mediates high-affinity binding of Helicobacter pylori to the ABO blood group antigen-glycosylated gastric mucosa. Here we show that BabA is acid responsive-binding is reduced at low pH and restored by acid neutralization. Acid responsiveness differs among strains; often correlates with different intragastric regions and evolves during chronic infection and disease progression; and depends on pH sensor sequences in BabA and on pH reversible formation of high-affinity binding BabA multimers. We propose that BabA's extraordinary reversible acid responsiveness enables tight mucosal bacterial adherence while also allowing an effective escape from epithelial cells and mucus that are shed into the acidic bactericidal lumen and that bio-selection and changes in BabA binding properties through mutation and recombination with babA-related genes are selected by differences among individuals and by changes in gastric acidity over time...
March 8, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28267445/abdominal-compression-by-waist-belt-aggravates-gastroesophageal-reflux-primarily-by-impairing-esophageal-clearance
#19
David R Mitchell, Mohammad H Derakhshan, Angela A Wirz, Stuart A Ballantyne, Kenneth E L McColl
BACKGROUND & AIMS: Central obesity promotes gastroesophageal reflux, which may be related to increased intra-abdominal pressure. We investigated the effect of increasing abdominal pressure by waist belt on reflux in patients with reflux disease. METHODS: We performed a prospective study of patients with esophagitis (n = 8) or Barrett's esophagus (n = 6); median age was 56 years and median body mass index was 26.8. Proton pump inhibitors were stopped at least 7 days before the study and H2 receptor antagonists were stopped for at least 24 hours before...
June 2017: Gastroenterology
https://www.readbyqxmd.com/read/28258834/the-effect-of-omeprazole-treatment-on-the-gut-microflora-and-neutrophil-function
#20
Maja Kostrzewska, Agnieszka Świdnicka-Siergiejko, Dorota Olszańska, Grażyna Jurkowska, Marzena Garley, Wioletta Ratajczak-Wrona, Ewa Jabłońska, Jacek Jamiołkowski, Andrzej Dabrowski
BACKGROUND AND AIM: Proton pump inhibitors (PPIs) may increase the risk of Clostridium difficile infections. There are interactions between gut microbiota and innate immune cells including neutrophils. We evaluated the effect of treatment with omeprazole on the gut microflora and neutrophil function. METHODS: In 50 patients, we evaluated the effect of 4-week omeprazole treatment (n=25 with 20mg per day and n=25 with 20mg twice daily) on intragastric pH, results of stool culture and lactulose hydrogen breath test (LHBT) and neutrophil function...
October 2017: Clinics and Research in Hepatology and Gastroenterology
keyword
keyword
51800
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"