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https://www.readbyqxmd.com/read/28351117/clinical-characteristics-of-patients-with-untreated-achalasia
#1
Han Ho Jeon, Jie-Hyun Kim, Young Hoon Youn, Hyojin Park, Jeffrey L Conklin
Background/Aims: Patients with untreated achalasia frequently complain of heartburn and regurgitation. The diagnosis of achalasia might be delayed because these symptoms are misinterpreted as gastroesophageal reflux. We aim to evaluate the clinical presentation, radiologic, and manometric findings in patient untreated achalasia. Methods: The records of patients diagnosed with primary achalasia between July 2004 and January 2012 at Gangnam Severance Hospital, Seoul, Korea were evaluated...
March 28, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28350791/acid-suppressing-therapies-and-subsite-specific-risk-of-stomach-cancer
#2
E Christina M Wennerström, Jacob Simonsen, M Constanza Camargo, Charles S Rabkin
BACKGROUND: Associations of stomach cancer risk with histamine type-2 receptor antagonists (H2RA) and proton-pump inhibitors (PPI) are controversial. We hypothesised that proximal extension of Helicobacter pylori infection from acid suppression would disproportionately increase cancers at proximal subsites. METHODS: A total of 1 563 860 individuals in the Danish Prescription Drug Registry first prescribed acid-suppressive drugs 1995-2011 were matched to unexposed population-based controls...
March 28, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28350746/perceived-stress-as-a-risk-factor-for-dyspepsia-a-register-based-cohort-study
#3
Ulrik Deding, Christian Torp-Pedersen, Henrik Bøggild
OBJECTIVE: Dyspepsia is a common condition and has a huge impact on quality of life and working capacity, but its causes are not well understood. An association between stress and dyspepsia has been debated for decades, but the issue has not been resolved. We examined the 3-year risk of redeeming a proton-pump inhibitor or an H2-receptor antagonist as a proxy of dyspepsia according to the level of perceived stress. PARTICIPANTS AND METHODS: Perceived stress was measured in a general health survey of 16 124 Danes aged older than 16 years of age in 2010 using Cohen's Perceived Stress Scale...
May 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28350745/the-irish-helicobacter-pylori-working-group-consensus-for-the-diagnosis-and-treatment-of-h-pylori-infection-in-adult-patients-in-ireland
#4
Sinead Smith, Breida Boyle, Denise Brennan, Martin Buckley, Paul Crotty, Maeve Doyle, Richard Farrell, Mary Hussey, David Kevans, Peter Malfertheiner, Francis Megraud, Sean Nugent, Anthony O'Connor, Colm O'Morain, Shiobhan Weston, Deirdre McNamara
BACKGROUND: Irish eradication rates for Helicobacter pylori are decreasing and there is an increase in the prevalence of antibiotic-resistant bacteria. These trends call into question current management strategies. OBJECTIVE: To establish an Irish Helicobacter pylori Working Group (IHPWG) to assess, revise and tailor current available recommendations. METHODS: Experts in the areas of gastroenterology and microbiology were invited to join the IHPWG...
May 2017: European Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28346596/withholding-proton-pump-inhibitors-to-prevent-recurrent-clostridium-difficile-time-for-a-randomized-trial
#5
Scott R Bauer, Patrick O'Malley
No abstract text is available yet for this article.
March 27, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28346595/association-of-gastric-acid-suppression-with-recurrent-clostridium-difficile-infection-a-systematic-review-and-meta-analysis
#6
Raseen Tariq, Siddharth Singh, Arjun Gupta, Darrell S Pardi, Sahil Khanna
Importance: Gastric acid suppression has been associated with an increased risk of primary Clostridium difficile infection (CDI), but the risk of recurrent CDI in patients taking gastric acid suppressant medications is unclear. Objective: To perform a systematic review and meta-analysis to evaluate the association between gastric acid suppressants and recurrent CDI. Data Sources: MEDLINE, EMBASE, the Cochrane Central Register, the Cochrane Database, and Web of Science were searched from January 1, 1995, to September 30, 2015, for studies assessing the association between gastric acid suppressant exposure and recurrent CDI...
March 27, 2017: JAMA Internal Medicine
https://www.readbyqxmd.com/read/28346068/institutional-profile-university-of-florida-health-personalized-medicine-program
#7
Larisa H Cavallari, Kristin W Weitzel, Amanda R Elsey, Xinyue Liu, Scott A Mosley, Donald M Smith, Benjamin J Staley, Almut G Winterstein, Carol A Mathews, Francesco Franchi, Fabiana Rollini, Dominick J Angiolillo, Petr Starostik, Michael J Clare-Salzler, David R Nelson, Julie A Johnson
The University of Florida (UF) Health Personalized Medicine Program launched in 2012 with CYP2C19 genotyping for clopidogrel response at UF Health Shands Hospital. We have since expanded CYP2C19 genotyping to UF Health Jacksonville and established the infrastructure at UF Health to support clinical implementation for five additional gene-drug pairs: TPMT-thiopurines, IFNL3 (IL28B)-PEG IFN-α-based regimens, CYP2D6-opioids, CYP2D6/CYP2C19-antidepressants and CYP2C19-proton pump inhibitors. We are contributing to the evidence based on outcomes with genotype-guided therapy through pragmatic studies of our clinical implementations...
March 27, 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28345665/oscillating-electric-field-measures-the-rotation-rate-in-a-native-rotary-enzyme
#8
Csilla-Maria Ferencz, Pál Petrovszki, András Dér, Krisztina Sebők-Nagy, Zoltán Kóta, Tibor Páli
Rotary enzymes are complex, highly challenging biomolecular machines whose biochemical working mechanism involves intersubunit rotation. The true intrinsic rate of rotation of any rotary enzyme is not known in a native, unmodified state. Here we use the effect of an oscillating electric (AC) field on the biochemical activity of a rotary enzyme, the vacuolar proton-ATPase (V-ATPase), to directly measure its mean rate of rotation in its native membrane environment, without any genetic, chemical or mechanical modification of the enzyme, for the first time...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345008/insights-into-the-mechanism-of-membrane-pyrophosphatases-by-combining-experiment-and-computer-simulation
#9
Nita R Shah, Craig Wilkinson, Steven P D Harborne, Ainoleena Turku, Kun-Mou Li, Yuh-Ju Sun, Sarah Harris, Adrian Goldman
Membrane-integral pyrophosphatases (mPPases) couple the hydrolysis of pyrophosphate (PPi) to the pumping of Na(+), H(+), or both these ions across a membrane. Recently solved structures of the Na(+)-pumping Thermotoga maritima mPPase (TmPPase) and H(+)-pumping Vigna radiata mPPase revealed the basis of ion selectivity between these enzymes and provided evidence for the mechanisms of substrate hydrolysis and ion-pumping. Our atomistic molecular dynamics (MD) simulations of TmPPase demonstrate that loop 5-6 is mobile in the absence of the substrate or substrate-analogue bound to the active site, explaining the lack of electron density for this loop in resting state structures...
May 2017: Structural Dynamics (Melville, N.Y.)
https://www.readbyqxmd.com/read/28342789/enhanced-gastric-stability-of-esomeprazole-by-molecular-interaction-and-modulation-of-microenvironmental-ph-with-alkalizers-in-solid-dispersion
#10
Hien Van Nguyen, Namhyun Baek, Beom-Jin Lee
Due to the instability of esomeprazole magnesium dihydrate (EPM), a proton pump inhibitor, in gastric fluid, enteric-coated dosage form is commonly used for therapeutic application. In this study, we prepared new gastric fluid resistant solid dispersions (SDs) containing alkalizers. Then, new mechanistic evidence regarding the effects of pharmaceutical alkalizers on the aqueous stability of EPM in simulated gastric fluid was investigated. The alkalizer-loaded SD were prepared by dissolving or dispersing EPM, hydroxypropyl methylcellulose (HPMC) 6 cps, and an alkalizer, in ethanol 50% (v/v) followed by spray drying...
March 22, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28340819/influence-of-proton-pump-inhibitors-on-mycophenolic-acid-pharmacokinetics-in-patients-with-renal-transplantation-and-the-relationship-with-cytochrome-2c19-gene-polymorphism
#11
H S Ciftci, M S Karadeniz, T Tefik, Y Caliskan, H Yazıcı, E Demir, A Turkmen, I Nane, F S Oguz, F Aydin
BACKGROUND: Most patients have serious digestive complications after renal transplantation. Therefore, it is important to protect gastrointestinal function to improve the survival rate of transplant patients. Proton pump inhibitors (PPIs) such as lansoprazole and rabeprazole are widely administered to renal transplant patients with mycophenolic acid (MPA) in the perioperative period. PPIs are metabolized by cytochrome (CYP) 2C19 enzymes. Mycophenolate sodium (MYF) and mycophenolate mofetil (MMF) have been used in immunosuppression...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28340510/the-diverse-family-of-mmpl-transporters-in-mycobacteria-from-regulation-to-antimicrobial-developments
#12
REVIEW
Albertus Viljoen, Violaine Dubois, Fabienne Girard-Misguich, Mickael Blaise, Jean-Louis Herrmann, Laurent Kremer
Mycobacterial genomes contain large sets of loci encoding membrane proteins that belong to a family of multidrug resistance pumps designated Resistance-Nodulation-Cell Division (RND) permeases. Mycobacterial membrane protein Large (MmpL) transporters represent a subclass of RND transporters known to participate in the export of lipid components across the cell envelope. These surface-exposed lipids with unusual structures play key roles in the physiology of mycobacteria and/or can act as virulence factors and immunomodulators...
March 24, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28339835/the-association-between-proton-pump-inhibitor-use-and-the-risk-of-adverse-kidney-outcomes-a-systematic-review-and-meta-analysis
#13
Surapon Nochaiwong, Chidchanok Ruengorn, Ratanaporn Awiphan, Kiatkriangkrai Koyratkoson, Chayutthaphong Chaisai, Kajohnsak Noppakun, Wilaiwan Chongruksut, Kednapa Thavorn
Background: Existing epidemiological studies illustrate that proton pump inhibitors (PPIs) may be related to adverse kidney outcomes. To date, no comprehensive meta-analysis has been conducted to evaluate and quantify this association. Methods: We performed a systematic review and meta-analysis of studies to assess the association between PPI use and the risk of adverse kidney outcomes. We searched MEDLINE, Embase, SCOPUS, Web of Science, CINAHL, Cochrane Library and grey literature with no language restrictions (through 31 October 2016)...
February 23, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339275/ultrafast-photoinduced-electric-polarization-switching-in-a-hydrogen-bonded-ferroelectric-crystal
#14
K Iwano, Y Shimoi, T Miyamoto, D Hata, M Sotome, N Kida, S Horiuchi, H Okamoto
Croconic acid crystals show proton displacive-type ferroelectricity with a large spontaneous polarization reaching 20  μC/cm^{2}, which originates from the strong coupling of proton and π-electron degrees of freedom. Such a coupling makes us expect a large polarization change by photoirradiations. Optical-pump second-harmonic-generation-probe experiments reveal that a photoexcited croconic-acid crystal loses the ferroelectricity substantially with a maximum quantum efficiency of more than 30 molecules per one absorbed photon...
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28337838/the-selective-metabotropic-glutamate-receptor-5-antagonist-mavoglurant-afq056-reduces-the-incidence-of-reflux-episodes-in-dogs-and-patients-with-moderate-to-severe-gastroesophageal-reflux-disease
#15
M-L Rouzade-Dominguez, N Pezous, O J David, R Tutuian, S Bruley des Varannes, J Tack, P Malfertheiner, H-D Allescher, M Ufer, A Rühl
BACKGROUND: Transient lower esophageal sphincter relaxations (TLESRs) induced by gastric distension are modulated by the metabotropic glutamate receptor 5 (mGluR5) that influences the vagal reflex loop. We therefore aimed to examine the effects of the selective mGluR5 antagonist mavoglurant (AFQ056) on the number of TLESRs in dogs and reflux episodes in patients with gastroesophageal reflux disease (GERD). METHODS: In a dog model, the number of meal-induced TLESRs was determined after intravenous (0...
March 23, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28336154/socioeconomic-and-therapy-factor-influence-on-self-reported-fatigue-anxiety-and-depression-in-rheumatoid-arthritis-patients
#16
Mirjana Lapčević, Mira Vuković, Branislav S Gvozdenović, Vesna Mioljević, Snežana Marjanović
INTRODUCTION: Fatigue, anxiety and depression are very frequent symptoms in patients with rheumatoid arthritis (RA). GOALS: In this study we evaluated the influence of socioeconomic characteristics, therapy and comorbidities on the self-reported high fatigue, anxiety and depression in patients with RA. METHOD: Multicenter cross-sectional study was performed in 22 health institutions in Serbia during the period from April-August 2014 in population of older RA patients...
February 27, 2017: Revista Brasileira de Reumatologia
https://www.readbyqxmd.com/read/28335325/nanoscale-electric-characteristics-and-oriented-assembly-of-halobacterium-salinarum-membrane-revealed-by-electric-force-microscopy
#17
Denghua Li, Yibing Wang, Huiwen Du, Shiwei Xu, Zhemin Li, Yanlian Yang, Chen Wang
Purple membranes (PM) of the bacteria Halobacterium salinarum are a unique natural membrane where bacteriorhodopsin (BR) can convert photon energy and pump protons. Elucidating the electronic properties of biomembranes is critical for revealing biological mechanisms and developing new devices. We report here the electric properties of PMs studied by using multi-functional electric force microscopy (EFM) at the nanoscale. The topography, surface potential, and dielectric capacity of PMs were imaged and quantitatively measured in parallel...
November 2, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334992/utility-of-chromogranin-b-compared-with-chromogranin-a-as-a-biomarker-in-japanese-patients-with-pancreatic-neuroendocrine-tumors
#18
Masami Miki, Tetsuhide Ito, Masayuki Hijioka, Lingaku Lee, Kohei Yasunaga, Keijiro Ueda, Takashi Fujiyama, Yuichi Tachibana, Ken Kawabe, Robert T Jensen, Yoshihiro Ogawa
Objective: Currently, serum chromogranin A is a well-established biomarker for pancreatic neuroendocrine tumors; however, other pancreatic diseases, oral use of a proton pump inhibitor and renal impairment can affect chromogranin A. Meanwhile, chromogranin B, belonging to the same granin family as chromogranin A, is not fully examined in these conditions. The present study aimed to evaluate the utility of chromogranin B as a pancreatic neuroendocrine tumor biomarker. Methods: Serum chromogranin B levels were determined by radioimmunoassay and serum chromogranin A levels by enzyme-linked immunosorbent assay in pancreatic neuroendocrine tumor (n = 91) and other pancreatic conditions, and in healthy people (n = 104), to assess the relationships with clinical features...
March 17, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28331640/a-case-of-hepatic-portal-venous-gas-hypothesis-of-a-transient-direct-communication-between-a-penetrating-antral-gastric-ulcer-and-mesenteric-varices
#19
Hassan M Ghoz, Shamlan M Sheikh, Kanika Khandelwal, Joseph Fiore, Nicholas James, Joel Weinstock
Hepatic portal venous gas (HPVG) is a rare radiological sign that usually signifies an acute intra-abdominal process, most commonly bowel ischemia and sepsis. Few reports described an association with underlying gastric pathologies. We report a 60-year-old patient who presented with melena and chills and was discovered to have a gastric ulcer that appeared to have penetrated into a mesenteric varix. This, in turn, likely caused development of HPVG associated with fungemia. Treatment with a proton pump inhibitor and bowel rest was sufficient to resolve symptoms and the HPVG...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/28331141/characteristics-and-outcomes-of-laparoscopic-surgery-in-patients-with-gastroesophageal-reflux-and-related-disease-a-single-center-experience
#20
Tsutomu Nomura, Katsuhiko Iwakiri, Takeshi Matsutani, Nobutoshi Hagiwara, Itsuo Fujita, Yoshiharu Nakamura, Yoshikazu Kanazawa, Hiroshi Makino, Noriyuki Kawami, Masao Miyashita, Eiji Uchida
BACKGROUND: Laparoscopic anti-reflux surgery (LARS) is generally the treatment of choice for patients with gastroesophageal reflux disease (GERD). This report describes our experiences in performing LARS on patients with GERD, and focuses retrospectively on the pathophysiology of individual patients and the current status of Japanese patients who have undergone LARS. We demonstrate that patients with non-erosive reflux disease resistant to proton pump inhibitors (PPI-resistant NERD) and high-risk giant hernia, whom we are sometimes hesitant to treat surgically, can be safely and successfully treated with LARS (depending on the pathophysiology of individual patients)...
2017: Journal of Nippon Medical School, Nippon Ika Daigaku Zasshi
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