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https://www.readbyqxmd.com/read/28206729/gut-microbiota-and-gastric-disease
#1
Dolores Sgambato, Agnese Miranda, Lorenzo Romano, Marco Romano
The gut microbiota may be considered a crucial "organ" of human body because of its role in the maintenance of the balance between health as well as disease. It is mainly located in the small bowel and colon, while, the stomach was long thought to be sterile in particular for its high acid production. In particular, stomach was considered "an hostile place" for bacterial growth until the identification of Helicobacter pylori (HP). Now, the stomach and its microbiota can be considered as two different "organs" that share the same place and they have an impact on each other...
15, 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28205554/the-oncoppi-network-of-cancer-focused-protein-protein-interactions-to-inform-biological-insights-and-therapeutic-strategies
#2
Zenggang Li, Andrei A Ivanov, Rina Su, Valentina Gonzalez-Pecchi, Qi Qi, Songlin Liu, Philip Webber, Elizabeth McMillan, Lauren Rusnak, Cau Pham, Xiaoqian Chen, Xiulei Mo, Brian Revennaugh, Wei Zhou, Adam Marcus, Sahar Harati, Xiang Chen, Margaret A Johns, Michael A White, Carlos Moreno, Lee A D Cooper, Yuhong Du, Fadlo R Khuri, Haian Fu
As genomics advances reveal the cancer gene landscape, a daunting task is to understand how these genes contribute to dysregulated oncogenic pathways. Integration of cancer genes into networks offers opportunities to reveal protein-protein interactions (PPIs) with functional and therapeutic significance. Here, we report the generation of a cancer-focused PPI network, termed OncoPPi, and identification of >260 cancer-associated PPIs not in other large-scale interactomes. PPI hubs reveal new regulatory mechanisms for cancer genes like MYC, STK11, RASSF1 and CDK4...
February 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28199735/novel-gastric-mucosal-findings-in-association-with-proton-pump-inhibitors
#3
EDITORIAL
Hajime Isomoto, Hiroki Kurumi
Proton pump inhibitors (PPIs) are prescribed worldwide as the treatment of choice for gastroesophageal reflux disease, and are known to exert preventive effects for upper gastrointestinal injuries due to aspirin or non-steroidal anti-inflammatory drugs. On the other hand, the long-term use of PPIs may cause such adverse events as fractures and enteric infections. Recently, they have been associated with mucosal changes including parietal cell protrusions, oxyntic gland dilatations and fundic gland polyps (FGPs)...
February 15, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28197557/doubly-charged-trimeric-cluster-ions-effective-in-mutual-chiral-recognition-of-tadalafil-and-three-proton-pump-inhibitors
#4
Lu Wang, Yunfeng Chai, Wenquan Zhu, Yuanjiang Pan, Cuirong Sun, Su Zeng
Mutual chiral recognition of four stereoisomers of tadalafil and three pairs of enantiomers of proton pump inhibitors (PPIs) including pantoprazole, lansoprazole, and omeprazole, as well as quantitative analysis of enantiomeric excess is achieved on the basis of the competitive fragmentation of doubly charged trimeric Ni(II) cluster ions. Compared with a singly charged trimeric cluster ion, a doubly charged trimeric cluster ion was proved efficient in the recognition of chiral drugs with one or multiple chiral centers, due to its rich fragmentation ions...
February 15, 2017: Analyst
https://www.readbyqxmd.com/read/28188977/lack-of-incremental-effect-of-histamine-receptor-antagonists-over-proton-pump-inhibitors-on-the-risk-of-neoplastic-progression-in-patients-with-barrett-s-esophagus-a-cohort-study
#5
Prashanthi N Thota, Kaveh Hajifathalian, Tanmayee Benjamin, Ashok Runkana, Rocio Lopez, Madhusudhan R Sanaka
AIMS: Long-term acid suppression lowers the risk of progression to esophageal adenocarcinoma (EAC) in patients with Barrett's esophagus (BE). With the recent reports about harmful effects of chronic proton pump inhibitor (PPI) use, there is renewed interest about alternative methods of acid suppression. Hence, our aim was to study the effect of H2 receptor antagonists (H2RA) on the risk of progression to neoplasia in our BE cohort. METHODS: This is a retrospective analysis of prospectively collected data of patients in our BE Registry from 2002 to 2015...
February 11, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28188528/lumier-a-discovery-tool-for-mammalian-protein-interaction-networks
#6
Miriam Barrios-Rodiles, Jonathan D Ellis, Benjamin J Blencowe, Jeffrey L Wrana
Protein-protein interactions (PPIs) play an essential role in all biological processes. In vivo, PPIs occur dynamically and depend on extracellular cues. To discover novel protein-protein interactions in mammalian cells, we developed a high-throughput automated technology called LUMIER (LUminescence-based Mammalian IntERactome). In this approach, we co-express a Luciferase (LUC)-tagged fusion protein along with a Flag-tagged protein in an efficiently transfectable cell line such as HEK-293T cells. The interaction between the two proteins is determined by co-immunoprecipitation using an anti-Flag antibody, and the presence of the LUC-tagged interactor in the complex is subsequently detected via its luciferase activity...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28184197/therapeutic-efficacy-of-esomeprazole-in-cotton-smoke-induced-lung-injury-model
#7
Christina Nelson, Jameisha Lee, Kang Ko, Andrew G Sikora, Mark D Bonnen, Perenlei Enkhbaatar, Yohannes T Ghebre
Proton pump inhibitors (PPIs) are well-known antacid drugs developed to treat gastric disorders. Emerging studies demonstrate that PPIs possess biological activities that extend beyond inhibition of H(+)/K(+) ATPase (proton pumps) expressed in parietal cells of the stomach. Some of the extra-gastric activities of PPIs include modulation of epithelial, endothelial, and immune cell functions. Recently, we reported that PPIs suppress the expression of several proinflammatory and profibrotic molecules, as well as enhance antioxidant mechanisms in order to favorably regulate lung inflammation and fibrosis in an animal model of bleomycin-induced lung injury...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28177671/the-effect-of-short-term-oral-treatment-with-omeprazole-or-pantoprazole-on-the-function-of-polymorphonuclear-neutrophils
#8
Maja Kostrzewska, Marzena Garley, Wioletta Ratajczak, Ewa Jablonska, Jacek Jamiołkowski, Andrzej Dabrowski
Recent studies report an increased risk of enteric infections in patients treated with proton pump inhibitors (PPIs). Polymorphonuclear neutrophils (PMNs) play a key role in host response to bacterial infection. We have evaluated the effect of omeprazole and pantoprazole treatment on the PMNs function. Fifteen patients were treated with omeprazole 20 mg daily and 15 patients with pantoprazole 40 mg daily for 7 days. Treatment with omeprazole or pantoprazole had no effect on spontaneous nitroblue tetrazolium (NBT) test results...
January 22, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28159656/influence-of-different-proton-pump-inhibitors-on-the-pharmacokinetics-of-voriconazole
#9
Fang Qi, Liqin Zhu, Na Li, Tingyue Ge, Gaoqi Xu, Shasha Liao
This study aimed to determine the influence of proton pump inhibitors (PPIs) on the pharmacokinetics of voriconazole and to characterise potential drug-drug interactions (DDIs) between voriconazole and various PPIs (omeprazole, esomeprazole, lansoprazole and rabeprazole). Using adjusted physicochemical data and the pharmacokinetic (PK) parameters of voriconazole and PPIs, physiologically based pharmacokinetic (PBPK) models were built and were verified in healthy subjects using GastroPlus(TM) to predict the plasma concentration-time profiles of voriconazole and PPIs...
January 31, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28159599/the-role-of-acid-suppression-in-barrett-s-esophagus
#10
REVIEW
Pooja S Elias, Don O Castell
BACKGROUND AND AIMS: In recent years, proton pump inhibitors (PPIs) have come under great scrutiny due to possible adverse long term side effects. At the same time, Barrett's esophagus a pre-malignant condition in the esophagus, continues to be a disease whose course is thought to be improved by the use of PPIs. METHODS: We review the impact of proton pump therapy on the esophagus and on Barrett'smucosa. In analyzing changes on a cellular level, we explore the effect of mixed gastric refluxate and the complex cascade that ensues with esophageal exposure of these contents...
January 31, 2017: American Journal of Medicine
https://www.readbyqxmd.com/read/28155718/improved-protein-protein-interactions-prediction-via-weighted-sparse-representation-model-combining-continuous-wavelet-descriptor-and-pseaa-composition
#11
Yu-An Huang, Zhu-Hong You, Xing Chen, Gui-Ying Yan
BACKGROUND: Protein-protein interactions (PPIs) are essential to most biological processes. Since bioscience has entered into the era of genome and proteome, there is a growing demand for the knowledge about PPI network. High-throughput biological technologies can be used to identify new PPIs, but they are expensive, time-consuming, and tedious. Therefore, computational methods for predicting PPIs have an important role. For the past years, an increasing number of computational methods such as protein structure-based approaches have been proposed for predicting PPIs...
December 23, 2016: BMC Systems Biology
https://www.readbyqxmd.com/read/28154800/eosinophilic-esophagitis-current-understanding-and-evolving-concepts
#12
REVIEW
Hamish Philpott, Barry Kweh, Francis Thien
Eosinophilic esophagitis (EoE) is now considered to represent a form of food allergy and this is demonstrated by a response to elimination diet in many patients. A critical additional factor may be an inherent impairment in epithelial barrier integrity, possibly worsened by reflux of gastric contents and improved with proton pump inhibitor (PPI) use. Key clinic challenges are posed by the absence of reliable allergy tests to guide elimination diet, and the subsequent need for invasive endoscopic assessment following empirical food challenge, meaning that corticosteroids will remain the mainstay of therapy for many...
January 2017: Asia Pacific Allergy
https://www.readbyqxmd.com/read/28151870/are-gastric-hyperplastic-polyps-an-additional-manifestation-in-celiac-disease-results-from-a-retrospective-study
#13
Maria Pina Dore, Giovanni Mario Pes, Chiara Rocchi, Maria Francesca Loria, Sara Soro, Gabrio Bassotti
Gastric polyps are frequently reported in patients undergoing upper endoscopic procedures. In this retrospective study, the association between hyperplastic polyps and celiac disease in Northern Sardinia was estimated.Age, gender, body mass index, and medications taken in the 2 preceding months, including proton-pump inhibitors (PPIs), H2 receptor blockers (anti-H2), Helicobacter pylori status, endoscopic findings, and histology from charts of patients undergoing esophago-gastro-duodenoscopy were reviewed. Polyps were classified as hyperplastic, fundic gland, inflammatory, and adenomatous...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28150242/prediction-of-protein-interactions-by-structural-matching-prediction-of-ppi-networks-and-the-effects-of-mutations-on-ppis-that-combines-sequence-and-structural-information
#14
Nurcan Tuncbag, Ozlem Keskin, Ruth Nussinov, Attila Gursoy
Structural details of protein interactions are invaluable to the understanding of cellular processes. However, the identification of interactions at atomic resolution is a continuing challenge in the systems biology era. Although the number of structurally resolved complexes in the Protein Databank increases exponentially, the complexes only cover a small portion of the known structural interactome. In this chapter, we review the PRISM system that is a protein-protein interaction (PPI) prediction tool-its rationale, principles, and applications...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28150240/analysis-of-protein-phosphorylation-and-its-functional-impact-on-protein-protein-interactions-via-text-mining-of-the-scientific-literature
#15
Qinghua Wang, Karen E Ross, Hongzhan Huang, Jia Ren, Gang Li, K Vijay-Shanker, Cathy H Wu, Cecilia N Arighi
Post-translational modifications (PTMs) are one of the main contributors to the diversity of proteoforms in the proteomic landscape. In particular, protein phosphorylation represents an essential regulatory mechanism that plays a role in many biological processes. Protein kinases, the enzymes catalyzing this reaction, are key participants in metabolic and signaling pathways. Their activation or inactivation dictate downstream events: what substrates are modified and their subsequent impact (e.g., activation state, localization, protein-protein interactions (PPIs))...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28148651/an-intramolecular-interaction-within-the-lipid-kinase-fab1-regulates-cellular-phosphatidylinositol-3-5-bisphosphate-lipid-levels
#16
Michael J Lang, Bethany S Strunk, Nadia Azad, Jason L Petersen, Lois S Weisman
Phosphorylated phosphoinositide lipids (PPIs) are low-abundance signaling molecules that control signal transduction pathways and are necessary for cellular homeostasis. The PPI phosphatidylinositol (3,5)-bisphosphate (PI(3,5)P2) is essential in multiple organ systems. PI(3,5)P2 is generated from PI3P by the conserved lipid kinase Fab1/PIKfyve. Defects in the dynamic regulation of PI(3,5)P2 are linked to human diseases. However, few mechanisms that regulate PI(3,5)P2 have been identified. Here we report an intramolecular interaction between the yeast Fab1 kinase region and an upstream conserved cysteine-rich (CCR) domain...
February 1, 2017: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/28139495/efficacy-of-proton-pump-inhibitors-for-patients-with-duodenal-ulcers-a-pairwise-and-network-meta-analysis-of-randomized-controlled-trials
#17
REVIEW
Zhan-Hong Hu, Ai-Ming Shi, Duan-Min Hu, Jun-Jie Bao
BACKGROUND/AIM: To compare the efficacy and tolerance of different proton pump inhibitors (PPIs) in different doses for patients with duodenal ulcers. MATERIALS AND METHODS: An electronic database was searched to collect all randomized clinical trials (RCTs), and a pairwise and network meta-analysis were performed. RESULTS: A total of 24 RCTs involving 6188 patients were included. The network meta-analysis showed that there were no significant differences for the 4-week healing rate of duodenal ulcer treated with different PPI regimens except pantoprazle 40 mg/d versus lansoprazole 15 mg/d [Relative risk (RR) = 3...
January 2017: Saudi Journal of Gastroenterology: Official Journal of the Saudi Gastroenterology Association
https://www.readbyqxmd.com/read/28134397/-review-update-on-magnesium-metabolism
#18
Pasquale Fatuzzo, Luca Zanoli, Viviana Scollo, Grazia Portale, Agostino Gaudio, Alessandra Pani, Antonio Granata
Magnesium is the second intracellular cation and the fourth most abundant mineral in the body. Low levels of magnesium have been associated with insulin resistance and type-2 diabetes mellitus, asthma, osteoporosis and chronic kidney disease (CKD). The use of proton pump inhibitors (PPIs) represents the most common cause of hypomagnesemia. The risk of hypomagnesemia, and consequently worsening of the renal function, is increased when diuretics are added to therapy in subjects treated with PPIs. Interestingly, diuretics and PPIs are two of the most used drugs in subjects with CKD...
November 2016: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28130652/clinical-implications-of-emerging-data-on-the-safety-of-proton-pump-inhibitors
#19
REVIEW
Felice Schnoll-Sussman, Philip O Katz
Proton pump inhibitors (PPI) are among the safest class of drugs used by all care providers, including gastroenterologists. They are the mainstay in treatment of acid-related disease, in particular, gastroesophageal reflux disease. Without them, many patients would experience a major decrement in their quality of life. However, no drug is without side effects or adverse events. In the past decade, numerous reports, principally case control studies and meta-analyses, have raised questions about important adverse events related to the use of PPIs...
January 27, 2017: Current Treatment Options in Gastroenterology
https://www.readbyqxmd.com/read/28128476/dementia-cognitive-impairment-and-proton-pump-inhibitor-therapy-a-systematic-review
#20
Riley Batchelor, Julia Fiona-Maree Gilmartin, William Kemp, Ingrid Hopper, Danny Liew
BACKGROUND: Proton pump inhibitors (PPIs) are among the most widely used medications worldwide. Dementia is an increasingly common cause of disability in older populations. Recent studies have suggested an increased risk of cognitive impairment and dementia diagnosis among people who consume PPIs. This systematic review explores dementia, cognitive impairment and the use of PPIs. METHODS: Systematic searches were conducted in the databases of MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials (CENTRAL), PSYCinfo, Scopus, Web of Science and ClinicalTrials...
January 27, 2017: Journal of Gastroenterology and Hepatology
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