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https://www.readbyqxmd.com/read/29050283/omeprazole-promotes-carcinogenesis-of-fore-stomach-in-mice-with-co-stimulation-of-nitrosamine
#1
Lei Huang, Dong-Jiang Qi, Wei He, A-Man Xu
OBJECTIVES: To investigate if oral omeprazole application induces cancers of fore and glandular stomach in mice. METHODS: A total of 66 eligible male mice were randomly divided into 6 groups, which were treated with control reagent, low (6 mg/kg) and high dose omeprazole (30 mg/kg), N-methyl-N'-nitro-N-nitrosoguanidine (MNNG, 100 mg/L water), and MNNG plus low and high dose omeprazole, respectively. After 24 weeks, concentrations of acid phosphatase (ACP) and N-acetyl-β-D-glucosaminidase(NAG) in serum and spleen was examined, and p21 and mTOR levels in stomach were detected...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29050278/identification-of-core-genes-and-outcome-in-gastric-cancer-using-bioinformatics-analysis
#2
Chenhua Sun, Qi Yuan, Dongdong Wu, Xiaohu Meng, Baolin Wang
Gastric cancer (GC) is a common malignant neoplasm of gastrointestinal tract. We chose gene expression profile of GSE54129 from GEO database aiming to find key genes during the occurrence and development of GC. 132 samples, including 111 cancer and 21 normal gastric mucosa epitheliums, were included in this analysis. Differentially expressed genes (DEGs) between GC patients and health people were picked out using GEO2R tool, then we performed gene ontology (GO) analysis and Kyoto Encyclopedia of Gene and Genome (KEGG) pathway analysis using The Database for Annotation, Visualization and Integrated Discovery (DAVID)...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29048336/proanthocyanidin-characterization-antioxidant-and-cytotoxic-activities-of-three-plants-commonly-used-in-traditional-medicine-in-costa-rica-petiveria-alliaceae-l-phyllanthus-niruri-l-and-senna-reticulata-willd
#3
Mirtha Navarro, Ileana Moreira, Elizabeth Arnaez, Silvia Quesada, Gabriela Azofeifa, Diego Alvarado, Maria J Monagas
The phenolic composition of aerial parts from Petiveria alliaceae L., Phyllanthus niruri L. and Senna reticulata Willd., species commonly used in Costa Rica as traditional medicines, was studied using UPLC-ESI-TQ-MS on enriched-phenolic extracts. Comparatively, higher values of total phenolic content (TPC), as measured by the Folin-Ciocalteau method, were observed for P. niruri extracts (328.8 gallic acid equivalents/g) than for S. reticulata (79.30 gallic acid equivalents/g) whereas P. alliaceae extract showed the lowest value (13...
October 19, 2017: Plants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29043504/the-molecular-physiopathogenesis-of-islet-amyloidosis
#4
Diti Chatterjee Bhowmick, Sanghamitra Singh, Saurabh Trikha, Aleksandar M Jeremic
Human islet amyloid polypeptide or amylin (hA) is a 37-amino acid peptide hormone produced and co-secreted with insulin by pancreatic β-cells. Under physiological conditions, hA regulates a broad range of biological processes including insulin release and slowing of gastric emptying, thereby maintaining glucose homeostasis. However, under the pathological conditions associated with type 2 diabetes mellitus (T2DM), hA undergoes a conformational transition from soluble random coil monomers to alpha-helical oligomers and insoluble β-sheet amyloid fibrils or amyloid plaques...
October 18, 2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/29042978/antiplatelet-drug-ticagrelor-delays-gastric-ulcer-healing-in-rats
#5
Jing-Jing Li, Xin-Ying Wu, Jing-Lou Chen, Guan-Rong Chen, Jun Xu, Ye Gu, Hong-Ping Song
Adenosine diphosphate P2Y12 receptor antagonist clopidogrel is not sufficiently safe for the gastric mucosa in patients with high risk of peptic ulcer, since it may impair healing of gastric erosions. However, the safety of the novel P2Y12 receptor antagonist ticagrelor in the gastric mucosa has not been elucidated to date. The present study aimed to examine whether ticagrelor delays gastric ulcer healing and to elucidate the involved mechanisms. Gastric kissing ulcers were produced in rats by luminal application of acetic acid solution, and ticagrelor was administered at dose of 10 or 20 mg/kg/day orally for 7 days...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29039494/internal-driving-factors-leading-to-extrahepatic-manifestation-of-the-hepatitis%C3%A2-c-virus-infection
#6
Zhou-Yi Wu, Jian-Rui Li, Meng-Hao Huang, Jun-Jun Cheng, Hu Li, Jin-Hua Chen, Xiao-Qin Lv, Zong-Gen Peng, Jian-Dong Jiang
The hepatitis C virus (HCV) infection is associated with various extrahepatic manifestations, which are correlated with poor outcomes, and thus increase the morbidity and mortality of chronic hepatitis C (CHC). Therefore, understanding the internal linkages between systemic manifestations and HCV infection is helpful for treatment of CHC. Yet, the mechanism by which the virus evokes the systemic diseases remains to be elucidated. In the present study, using gene set enrichment analysis (GSEA) and signaling pathway impact analysis (SPIA), a comprehensive analysis of microarray data of mRNAs was conducted in HCV-infected and -uninfected Huh7...
October 5, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29038503/gastric-acid-suppression-promotes-alcoholic-liver-disease-by-inducing-overgrowth-of-intestinal-enterococcus
#7
Cristina Llorente, Peter Jepsen, Tatsuo Inamine, Lirui Wang, Sena Bluemel, Hui J Wang, Rohit Loomba, Jasmohan S Bajaj, Mitchell L Schubert, Masoumeh Sikaroodi, Patrick M Gillevet, Jun Xu, Tatiana Kisseleva, Samuel B Ho, Jessica DePew, Xin Du, Henrik T Sørensen, Hendrik Vilstrup, Karen E Nelson, David A Brenner, Derrick E Fouts, Bernd Schnabl
Chronic liver disease is rising in western countries and liver cirrhosis is the 12th leading cause of death worldwide. Simultaneously, use of gastric acid suppressive medications is increasing. Here, we show that proton pump inhibitors promote progression of alcoholic liver disease, non-alcoholic fatty liver disease, and non-alcoholic steatohepatitis in mice by increasing numbers of intestinal Enterococcus spp. Translocating enterococci lead to hepatic inflammation and hepatocyte death. Expansion of intestinal Enterococcus faecalis is sufficient to exacerbate ethanol-induced liver disease in mice...
October 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/29038353/cell-cycle-dependent-expression-of-the-cck2-receptor-by-gastrointestinal-myofibroblasts-putative-role-in-determining-cell-migration
#8
Akos Varga, Jothi Dinesh Kumar, Alec W M Simpson, Steven Dodd, Peter Hegyi, Graham J Dockray, Andrea Varro
The well-known action of the gastric hormone gastrin in stimulating gastric acid secretion is mediated by activation of cholecystokinin-2 receptors (CCK2R). The latter are expressed by a variety of cell types suggesting that gastrin is implicated in multiple functions. During wound healing in the stomach CCK2R may be expressed by myofibroblasts. We have now characterized CCK2R expression in cultured myofibroblasts. Immunocytochemistry showed that a relatively small proportion (1-6%) of myofibroblasts expressed the receptor regardless of the region of the gut from which they were derived, or whether from cancer or control tissue...
October 2017: Physiological Reports
https://www.readbyqxmd.com/read/29037331/preload-of-slowly-digestible-carbohydrate-microspheres-decreases-gastric-emptying-rate-of-subsequent-meal-in-humans
#9
Fatimata Cisse, Elizabeth A Pletsch, Daniel P Erickson, Mohammad Chegeni, Anna M R Hayes, Bruce R Hamaker
Gastric emptying rate influences how fast the nutrients of a meal are delivered to the body, and when slow, it moderates glycemic response and may impact satiety. Carbohydrates are one of the macronutrients that trigger the ileal brake, and we hypothesized that slowly digestible carbohydrate (SDC) administered in a premeal load would delay gastric emptying. A crossover design study was conducted with 10 healthy adults using fabricated SDC-microspheres (cooked) that were given 20 minutes before a non-nutritive viscous paste meal...
September 2017: Nutrition Research
https://www.readbyqxmd.com/read/29033568/in-vivo-evaluation-of-cetuximab-conjugated-poly-%C3%AE-glutamic-acid-docetaxel-nanomedicines-in-egfr-overexpressing-gastric-cancer-xenografts
#10
Maya Sreeranganathan, Saji Uthaman, Bruno Sarmento, Chethampadi Gopi Mohan, In-Kyu Park, Rangasamy Jayakumar
Epidermal growth factor receptor (EGFR), upregulated in gastric cancer patients, is an oncogene of interest in the development of targeted cancer nanomedicines. This study demonstrates in silico modeling of monoclonal antibody cetuximab (CET MAb)-conjugated docetaxel (DOCT)-loaded poly(γ-glutamic acid) (γ-PGA) nanoparticles (Nps) and evaluates the in vitro/in vivo effects on EGFR-overexpressing gastric cancer cells (MKN-28). Nontargeted DOCT-γ-PGA Nps (NT Nps: 110±40 nm) and targeted CET MAb-DOCT-γ-PGA Nps (T Nps: 200±20 nm) were prepared using ionic gelation followed by 1-Ethyl-3-(3-dimethyl aminopropyl)carbodiimide-N-Hydoxysuccinimide (EDC-NSH) chemistry...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29032300/gastric-cathepsin-d-exception-or-the-rule-in-decapods-crustaceans
#11
Diana Martínez-Alarcón, Reinhard Saborowski, Liliana Rojo-Arreola, Fernando García-Carreño
Cathepsin D is an aspartic endopetidase with typical characteristics of lysosomal enzymes. Cathepsin D activity has been reported in the gastric fluid of clawed lobsters where it acts as an extracellular digestive enzyme. Here we investigate whether cathepsin D is unique in clawed lobsters or, instead, common in decapod crustaceans. Eleven species of decapods belonging to six infraorders were tested for cathepsin D activity in the midgut gland, the muscle tissue, the gills, and when technically possible, in the gastric fluid...
October 11, 2017: Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/29031770/effects-of-three-major-amino-acids-found-in-japanese-broth-on-glucose-metabolism-and-gastric-emptying
#12
Fumika Mano, Kaori Ikeda, Erina Joo, Shunsuke Yamane, Norio Harada, Nobuya Inagaki
OBJECTIVES: To our knowledge, the effect of the broth of dried kelp and dried bonito, dashi, on glucose metabolism and digestion has rarely been studied. Based on the component analysis of three actual broths served in traditional restaurants, a chemically synthesized broth with three free amino acids (histidine, glutamate, aspartate) and salt was prepared to investigate their effect on glucose metabolism, glucose-dependent insulinotropic polypeptide (GIP), and glucagon-like peptide 1 (GLP-1) secretion, and digestion...
August 10, 2017: Nutrition
https://www.readbyqxmd.com/read/29028286/doppler-guided-goal-directed-fluid-therapy-does-not-affect-intestinal-cell-damage-but-increases-global-gastrointestinal-perfusion-in-colorectal-surgery-a-randomized-controlled-trial
#13
Kostan W Reisinger, Henriette M Willigers, Jochen Jansen, Wim A Buurman, Maarten F Von Meyenfeldt, Geerard L Beets, Martijn Poeze
Individualized, goal-directed fluid therapy (GDFT) based on Doppler measurements of stroke volume has been proposed as a treatment strategy in terms of reducing complications, mortality and length of hospital stay in major bowel surgery. We studied the effect of Doppler guided GDFT on intestinal damage as compared with standard post-operative fluid replacement. STUDY DESIGN: Patients undergoing elective colorectal resection for malignancy were randomized to standard intra- and postoperative fluid therapy or standard fluid therapy with additional Doppler guided GDFT...
October 13, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/29026731/not-all-children-with-cystic-fibrosis-have-abnormal-esophageal-neutralization-during-chemical-clearance-of-acid-reflux
#14
Frederick W Woodley, Melissa Moore-Clingenpeel, Rodrigo Strehl Machado, Christopher J Nemastil, Sudarshan R Jadcherla, Don Hayes, Benjamin T Kopp, Ajay Kaul, Carlo Di Lorenzo, Hayat Mousa
PURPOSE: Acid neutralization during chemical clearance is significantly prolonged in children with cystic fibrosis, compared to symptomatic children without cystic fibrosis. The absence of available reference values impeded identification of abnormal findings within individual patients with and without cystic fibrosis. The present study aimed to test the hypothesis that significantly more children with cystic fibrosis have acid neutralization durations during chemical clearance that fall outside the physiological range...
September 2017: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/29023522/microencapsulation-of-clostridium-difficile-specific-bacteriophages-using-microfluidic-glass-capillary-devices-for-colon-delivery-using-ph-triggered-release
#15
Gurinder K Vinner, Goran T Vladisavljević, Martha R J Clokie, Danish J Malik
The prevalence of pathogenic bacteria acquiring multidrug antibiotic resistance is a global health threat to mankind. This has motivated a renewed interest in developing alternatives to conventional antibiotics including bacteriophages (viruses) as therapeutic agents. The bacterium Clostridium difficile causes colon infection and is particularly difficult to treat with existing antibiotics; phage therapy may offer a viable alternative. The punitive environment within the gastrointestinal tract can inactivate orally delivered phages...
2017: PloS One
https://www.readbyqxmd.com/read/29023421/helicobacter-pylori-vacuolating-toxin-and-gastric-cancer
#16
REVIEW
Mark S McClain, Amber C Beckett, Timothy L Cover
Helicobacter pylori VacA is a channel-forming toxin unrelated to other known bacterial toxins. Most H. pylori strains contain a vacA gene, but there is marked variation among strains in VacA toxin activity. This variation is attributable to strain-specific variations in VacA amino acid sequences, as well as variations in the levels of VacA transcription and secretion. In this review, we discuss epidemiologic studies showing an association between specific vacA allelic types and gastric cancer, as well as studies that have used animal models to investigate VacA activities relevant to gastric cancer...
October 12, 2017: Toxins
https://www.readbyqxmd.com/read/29019930/biological-evaluation-and-molecular-docking-of-protocatechuic-acid-from-hibiscus-sabdariffa-l-as-a-potent-urease-inhibitor-by-an-esi-ms-based-method
#17
Sherif T S Hassan, Emil Švajdlenka
Studies on enzyme inhibition remain a crucial area in drug discovery since these studies have led to the discoveries of new lead compounds useful in the treatment of several diseases. In this study, protocatechuic acid (PCA), an active compound from Hibiscus sabdariffa L. has been evaluated for its inhibitory properties against jack bean urease (JBU) as well as its possible toxic effect on human gastric epithelial cells (GES-1). Anti-urease activity was evaluated by an Electrospray Ionization-Mass Spectrometry (ESI-MS) based method, while cytotoxicity was assayed by the MTT method...
October 11, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29018360/adenosine-direct-and-indirect-actions-on-gastric-acid-secretion
#18
REVIEW
Rosa M Arin, Adriana Gorostidi, Hiart Navarro-Imaz, Yuri Rueda, Olatz Fresnedo, Begoña Ochoa
Composed by a molecule of adenine and a molecule of ribose, adenosine is a paradigm of recyclable nucleoside with a multiplicity of functions that occupies a privileged position in the metabolic and regulatory contexts. Adenosine is formed continuously in intracellular and extracellular locations of all tissues. Extracellular adenosine is a signaling molecule, able to modulate a vast range of physiologic responses in many cells and organs, including digestive organs. The adenosine A1, A2A, A2B, and A3 receptors are P1 purinergic receptors, G protein-coupled proteins implicated in tissue protection...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29018343/impact-of-gastric-h-k-atpase-rs2733743-on-the-intragastric-ph-values-of-dexlansoprazole-injection-in-chinese-subjects
#19
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/29018259/clinicopathological-and-molecular-characteristics-of-synchronous-gastric-adenocarcinoma-and-gastrointestinal-stromal-tumors
#20
Jun-Ming Luo, Fa-Long Cao, Chen Meng, Li-Jun Lin, Si-Qing Ma, Shao-Hua Peng, Hong-Ling Gao, Sara Javidiparsijani, Gui-Rong Wang, Meng-Lan Zhang, Jian-Guo Xin, Yi-Chun Wang, Shu-Kun Zhang
Synchronous gastric tumors that consist of both gastrointestinal stromal tumor (GIST) and adenocarcinoma are rare. We studied the clinicopathological and molecular characteristics of six cases containing both gastric adenocarcinoma and GIST. By means of immunohistochemical analysis, all GIST cells expressed CD117, CD34 and Dog1 in all six synchronous gastric adenocarcinomas with GIST, and in GIST alone. Sequencing analysis demonstrated that exon 11 c-kit mutations were present in two of six synchronous tumors and four of five GISTs...
October 10, 2017: Scientific Reports
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