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https://www.readbyqxmd.com/read/28917897/reduction-of-au-iii-by-a-%C3%AE-cyclodextrin-polymer-in-acid-medium-a-stated-unattainable-reaction
#1
Rudy Martin-Trasanco, Roberto Cao, Hilda Esperanza Esparza-Ponce, Maria Elena Montero-Cabrera, Ramiro Arratia-Pérez
Gold nanoparticles (AuNPs) can be prepared from the reduction of Au(III) with cyclodextrins acting as both, reducing and capping agent. It has been stated that a basic medium (pH=9-12) is a mandatory condition to achieve such reduction. We demonstrated, for the first time, the reduction of Au(III) by a crosslinked β-cyclodextrin-epichlorohydrin polymer (βCDP) in acid medium (pH ∼3). The coordination of Au(III) to the βCD in βCDP polymer required a βCD:[AuCl4](-) ratio of 4:1. The same ratio was necessary to achieve a 50% of the reduction of Au(III) to Au(0) within the first 24h of reaction...
November 1, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28917362/a-comparative-study-of-the-antacid-effect-of-some-commonly-consumed-foods-for-hyperacidity-in-an-artificial-stomach-model
#2
Vandana Panda, Priyanka Shinde, Jyoti Deora, Pankaj Gupta
OBJECTIVES: The incorporation of certain alkalinizing vegetables, fruits, milk and its products in the diet has been known to alleviate hyperacidity. These foods help to restore the natural gastric balance and function, curb acid reflux, aid digestion, reduce the burning sensation due to hyperacidity and soothe the inflamed mucosa of the stomach. The present study evaluates and compares the antacid effect of broccoli, kale, radish, cucumber, lemon juice, cold milk and curd in an artificial stomach model...
October 2017: Complementary Therapies in Medicine
https://www.readbyqxmd.com/read/28916953/dexlansoprazole-for-heartburn-relief-in-adolescents-with-symptomatic-nonerosive-gastro-esophageal-reflux-disease
#3
Benjamin D Gold, Betsy Pilmer, Jaroslaw Kierkuś, Barbara Hunt, Maria Claudia Perez, David Gremse
BACKGROUND: Proton pump inhibitors are commonly used to treat gastro-esophageal reflux disease (GERD) and nonerosive GERD (NERD) in adolescents and adults. Despite the efficacy of available medications, many patients have persisting symptoms, indicating a need for more effective agents. AIMS: To assess the safety and efficacy of dexlansoprazole dual delayed-release capsules in adolescents for treatment of symptomatic NERD. METHODS: A phase 2, open-label, multicenter study was conducted in adolescents aged 12-17 years...
September 15, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28914696/the-overlap-of-gastroesophageal-reflux-disease-and-functional-constipation-in-children-the-efficacy-of-constipation-treatment
#4
Masallah Baran, Yeliz Cagan Appak, Miray Karakoyun, Sevda Yalcinkaya, Kayi Eliacik, Bumin N Dundar
OBJECTIVES: This study was designed to investigate the frequency of gastroesophageal reflux disease (GERD) in children with functional constipation (FC). It was structured to assess the improvement level in reflux symptoms by measuring the acid reflux in these patients after they had received FC treatment. METHODS: Ninety-four children who suffered from constipation were evaluated prospectively. Data forms were completed to assess the GERD symptoms in all the cases...
September 13, 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28911949/postprandial-high-resolution-impedance-manometry-identifies-mechanisms-of-non-response-to-proton-pump-inhibitors
#5
Rena Yadlapati, Michael Tye, Sabine Roman, Peter J Kahrilas, Katherine Ritter, John E Pandolfino
BACKGROUND & AIMS: Recognition of rumination and supragastric belching is often delayed as symptoms may be mistakenly attributed to gastroesophageal reflux disease (GERD). However, distinct from GERD, rumination and supragastric belching are more responsive to behavioral interventions than to acid-suppressive and anti-reflux therapies. Postprandial high-resolution impedance manometry (PP-HRIM) is an efficient method to identify rumination and belches. We investigated the distribution of postprandial profiles determined by PP-HRIM, and identified patient features associated with postprandial profiles among patients with non-response to proton pump inhibitors (PPIs)...
September 11, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28906377/reflux-episodes-and-esophageal-impedance-levels-in-patients-with-typical-and-atypical-symptoms-of-gastroesophageal-reflux-disease
#6
Bi Xing Ye, Liu Qin Jiang, Lin Lin, Ying Wang, Meifeng Wang
To determine the relationship between baseline impedance levels and gastroesophageal reflux, we retrospectively enrolled 110 patients (54 men and 56 female; mean age, 51 ± 14 years) with suspected gastroesophageal reflux disease (GERD) who underwent 24-h multichannel intraluminal impedance and pH monitoring. Patients were stratified according to symptom (typical or atypical) and reflux types (acid reflux, nonacid reflux [NAR], or no abnormal reflux). Mean nocturnal baseline impedance (MNBI) were measured 3 cm (distal esophagus) and 17 cm (proximal esophagus) above the lower esophageal sphincter...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28900178/uniformly-dispersed-platinum-cobalt-alloy-nanoparticles-with-stable-compositions-on-carbon-substrates-for-methanol-oxidation-reaction
#7
Hui Liu, Chengyin Li, Dong Chen, Penglei Cui, Feng Ye, Jun Yang
Alloying platinum (Pt) with suitable transition metals is effective way to enhance their catalytic performance for methanol oxidation reaction, and reduce their cost at mean time. Herein, we report our investigation on the synthesis of bimetallic platinum-cobalt (PtCo) alloy nanoparticles, their activation, as well as the catalytic evaluation for methanol oxidation reaction. The strategy starts with the synthesis of PtCo alloy nanoparticles in an organic medium, followed by loading on carbon substrates. We then remove the capping agent by refluxing the carbon-supported PtCo particles in acetic acid before electrochemical measurements...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28895583/psychosocial-distress-and-quality-of-life-impairment-are-associated-with-symptom-severity-in-ppi-non-responders-with-normal-impedance-ph-profiles
#8
Rena Yadlapati, Michael Tye, Laurie Keefer, Peter J Kahrilas, John E Pandolfino
OBJECTIVES: Up to 50% of patients with reflux symptoms do not manifest a satisfactory symptom response to proton pump inhibitor (PPI) therapy. Our primary aim in this study was to identify factors associated with symptom perception among PPI non-responder phenotypes. METHODS: This prospective observational cohort study was performed from September 2014 to January 2017 at a single academic medical center and included PPI non-responders who underwent 24-h impedance-pH monitoring and completed a questionnaire set measuring patient-reported symptom severity, quality of life (QOL), and psychosocial distress...
September 12, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28894571/vonoprazan-10-mg-daily-is-effective-for-the-treatment-of-patients-with-proton-pump-inhibitor-resistant-gastroesophageal-reflux-disease
#9
Satoshi Shinozaki, Hiroyuki Osawa, Yoshikazu Hayashi, Hirotsugu Sakamoto, Yasutoshi Kobayashi, Alan Kawarai Lefor, Hironori Yamamoto
Gastroesophageal reflux disease (GERD) is commonly treated by primary care physicians. Although proton pump inhibitors (PPI) have been the mainstay of GERD treatment for two decades, in some patients GERD is refractory to standard dose PPI for more than eight weeks and is referred to as PPI-resistant GERD. Vonoprazan, a novel competitive acid blocker, became available in Japan for the treatment of patients with GERD, and has greater acid inhibition than existing PPIs. The aim of the present study was to determine the effect of vonoprazan 10 mg daily on PPI-resistant GERD...
September 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28884817/association-between-cyp2c19-17-alleles-and-ph-probe-testing-outcomes-in-children-with-symptomatic-gastroesophageal-reflux
#10
James P Franciosi, Edward B Mougey, Andre Williams, Roberto A Gomez-Suarez, Cameron Thomas, Christa L Creech, Katherine George, Diana Corao, John J Lima
Esophageal pH monitoring remains a primary diagnostic tool for detecting gastroesophageal reflux disease (GERD). GERD that is refractory to proton pump inhibitor (PPI) medications may be related to CYP2C19 variants. Current PPI dosing practices in children do not take into account CYP2C19 allelic variants, which may lead to underdosing and subsequently to a misperception of PPI therapy failure. We hypothesized that pH probe acid exposure outcomes associate with CYP2C19*17 alleles among children with clinical concern for GERD...
September 8, 2017: Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28884564/pattern-of-food-intolerance-in-patients-with-gastro-esophageal-reflux-symptoms
#11
Michele Caselli, Natalina Lo Cascio, Stefano Rabitti, Leonardo H Eusebi, Elena Zeni, Cecilia Soavi, Francesca Cassol, Giovanni Zuliani, Rocco M Zagari
BACKGROUND: Many food items have been involved in gastro-esophageal reflux disease pathogenesis and dietary modification has been proposed as first-line treatment. Test-based exclusion diets have shown to significantly reduce reflux symptoms. we aimed to assess the patterns of food intolerance in a series of patients with typical gastro-esophageal reflux symptoms (GERS). METHODS: We retrospectively evaluated all patients with typical reflux symptoms, attending the Centre Study Association on Food Intolerance and Nutrition of Ferrara from January 2010 to October 2015, who resulted positive to at least one food item at the leucocytotoxic test...
September 7, 2017: Minerva Medica
https://www.readbyqxmd.com/read/28882408/dental-and-oropharyngeal-lesions-in-rats-with-chronic-acid-reflux-esophagitis
#12
Rintaro Shimazu, Mihoko Yamamoto, Akimichi Minesaki, Yuichiro Kuratomi
OBJECTIVE: In this study, we evaluated pathological changes in the tooth and pharynx of GERD rats to elucidate the association between gastric acid reflux and oral and pharyngeal diseases. METHODS: An experimental rat model of chronic acid reflux esophagitis was surgically created. The oral cavities were observed histologically every 2 weeks until 20 weeks after surgery. RESULTS: At 10 weeks after surgery, molar crown heights in GERD rats were shorter than that in control rats, and inflammatory cell infiltration by gastric acid reflux was found in the periodontal mucosa of GERD rats...
September 4, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28881892/influence-of-esophagectomy-on-the-gastroesophageal-reflux-in-patients-with-esophageal-cancer
#13
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/28880273/tailored-therapy-guided-by-multichannel-intraluminal-impedance-ph-monitoring-for-refractory-non-erosive-reflux-disease
#14
Nunzio Ranaldo, Giuseppe Losurdo, Andrea Iannone, Mariabeatrice Principi, Michele Barone, Massimo De Carne, Enzo Ierardi, Alfredo Di Leo
A relevant percentage of non-erosive reflux disease (NERD) is refractory to proton pump inhibitors (PPIs) treatment. Multichannel intraluminal impedance pH (MII-pH) monitoring should give useful pathophysiological information about refractoriness. Therefore, our aim was to assess whether this technique could be useful to guide a 'tailored' therapy in refractory NERD. We retrospectively recruited NERD patients undergoing MII-pH monitoring for unsuccessful treatment. All patients had undergone upper endoscopy, and those with erosive esophagitis were excluded...
September 7, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28874049/understanding-the-capsanthin-tails-in-regulating-the-hydrophilic-lipophilic-balance-of-carbon-dots-for-a-rapid-crossing-cell-membrane
#15
Jing Chen, Xiang Zhang, Ye Zhang, Wei Wang, Shuya Li, Yucai Wang, Mengyue Hu, Li Liu, Hong Bi
Here we use natural Chinese paprika to prepare a new kind of amphiphilic carbon dot (A-Dot) that exhibits bright, multicolored fluorescence and contains hydrophilic groups as well as lipophilic capsanthin tails on the surface. It is found that the capsanthin tails in a phospholipid-like structure can promote cell internalization of the A-Dots via crossing cell membranes rapidly in an energy-independent fashion. Compared to highly hydrophilic carbon dots (H-Dots), a control sample prepared from the microwave thermolysis of citric acid and ethylenediamine, our synthesized A-Dots can be taken up by CHO, HeLa, and HFF cells more easily...
September 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28870413/esophageal-baseline-impedance-levels-allow-the-identification-of-esophageal-involvement-in-patients-with-systemic-sclerosis
#16
Patrizia Zentilin, Vincenzo Savarino, Elisa Marabotto, Giuseppe Murdaca, Alberto Sulli, Carmen Pizzorni, Francesco Puppo, Edoardo Savarino
INTRODUCTION: Distal esophageal baseline impedance (BI) levels reflect the esophageal mucosal integrity in reflux disease. Systemic sclerosis (SSc) could potentially affect the integrity of esophageal mucosa and consequently impair distal and proximal BI levels, but data in this regard are lacking. AIM AND METHODS: We aimed to prospectively investigate and compare BI levels among non-erosive reflux disease (NERD), SSc patients, and healthy controls (HCs). Consecutive patients with reflux symptoms and well-defined diagnosis of SSc underwent upper endoscopy and, in case of no lesions encountered, manometry and impedance-pH testing off-therapy...
August 9, 2017: Seminars in Arthritis and Rheumatism
https://www.readbyqxmd.com/read/28859384/symptom-association-latency-during-ambulatory-reflux-monitoring-a-review-of-1445-symptoms
#17
M Abdul-Hussein, D Castell
To determine the optimal time window of symptom association in GERD patient, a 2-minute time window is nonapplicable for all gastroesophageal reflux (GERD) symptoms and 5 minutes remains an arbitrary choice. Symptom association analysis is a critical component in pH-impedance (imp) testing. Symptom index (SI) and symptom association probability (SAP) are the two widely accepted methods. Both were introduced in the preimpedance era and initially tested in patients with typical GERD symptoms. We reviewed ambulatory pH-imp studies of (294) patients referred for evaluation of possible GERD symptoms from January 2012 to August 2015...
October 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28859383/effect-of-alginate-in-patients-with-gerd-hiatal-hernia-matters
#18
R Vardar, M Keskin, E Valitova, B Bayrakci, E Yildirim, S Bor
Alginate-based formulations are frequently used as add-on proton pump inhibitor (PPI) therapy to help control of heartburn and regurgitation. There are limited data regarding the mechanisms and effects of alginate-based formulations. We aimed to evaluate the effects of the sodium alginate intake and its likely temporal relations on intraesophageal reflux events by MII-pH in patients with and without hiatal hernia (HH). Fifty GERD patients (18 with HH, 32 without HH) with heartburn or regurgitation once a week or more common were included...
October 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28859358/a-review-of-medical-therapy-for-proton-pump-inhibitor-nonresponsive-gastroesophageal-reflux-disease
#19
L Hillman, R Yadlapati, A J Thuluvath, M A Berendsen, J E Pandolfino
Up to 40% of patients report persistent gastroesophageal reflux disease (GERD) symptoms despite proton pump inhibitor (PPI) therapy. This review outlines the evidence for medical therapy for PPI nonresponsive GERD. A literature search for GERD therapies from 2005 to 2015 in PubMed, EMBASE, Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews identified 2928 unique citations. Of those, 40 unique articles specific to the impact of PPI metabolizer genotype on PPI response and the use adjunctive medical therapies were identified...
September 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28855537/activation-of-nadph-oxidases-leads-to-dna-damage-in-esophageal-cells
#20
Vikas Bhardwaj, Ravindran Caspa Gokulan, Andela Horvat, Liudmila Yermalitskaya, Olga Korolkova, Kay M Washington, Wael El-Rifai, Sergey I Dikalov, Alexander I Zaika
Gastroesophageal reflux disease (GERD) is the strongest known risk factor for esophageal adenocarcinoma. In the center of tumorigenic events caused by GERD is repeated damage of esophageal tissues by the refluxate. In this study, we focused on a genotoxic aspect of exposure of esophageal cells to acidic bile reflux (BA/A). Analyzing cells generated from patients with Barrett's esophagus and human esophageal specimens, we found that BA/A cause significant DNA damage that is mediated by reactive-oxygen species...
August 30, 2017: Scientific Reports
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