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Helicobacter pylori

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https://www.readbyqxmd.com/read/28927248/comparison-of-two-methods-for-the-in-vivo-diagnosis-of-helicobacter-pylori-infection-using-a-tablet-of-13c-urea
#1
Daniela Gilardi, Gionata Fiorino, Federica Furfaro, Marina F Alfieri, Ilaria Orlandi, Mariangela Allocca, Silvio Danese
BACKGROUND: The urea Breath-test is a widely-used method to detect the presence of Helicobacter pylori (HP) infection. Recently, new technologies were introduced, to obtain an immediate test result by continuous breath samples analysis after labeled urea intake. The total test duration is shorter than 20 minutes. METHODS: The study compared two diagnostic methods requiring the administration of EXPIROBACTER® (Sofar SpA, Trezzano Rosa, Milan, Italy) 100 mg as a source of labeled urea...
December 2017: Minerva Gastroenterologica e Dietologica
https://www.readbyqxmd.com/read/28927196/the-intricate-interplay-between-msi-and-polymorphisms-of-dna-repair-enzymes-in-gastric-cancer-h-pylori-associated
#2
Isabelle Joyce de Lima Silva-Fernandes, Emanuele Silva de Oliveira, Juliana Carvalho Santos, Marcelo Lima Ribeiro, Adriana Camargo Ferrasi, Maria Inês de Moura Campos Pardini, Rommel Mário Rodriguez Burbano, Silvia Helena Barem Rabenhorst
Gastric cancer is the fourth most common type of cancer worldwide. Helicobacter pylori is a well-established risk factor and may cause injuries to genomic integrity through an inefficient DNA repair. This study aimed to examine the influence of polymorphisms in DNA repair enzymes using markers for microsatellite instability (MSI). Polymorphisms of DNA repair enzymes were detected by PCR-RFLP and MSI, by high resolution melt (HRM) analysis. Helicobacter pylori detection and genotyping were accomplished by PCR...
July 1, 2017: Mutagenesis
https://www.readbyqxmd.com/read/28925075/understanding-the-catalytic-mechanism-and-the-nature-of-transition-state-of-an-attractive-drug-target-enzyme-shikimate-kinase-by-qm-mm-studies
#3
Jianzhuang Yao, Xia Wang, Haixia Luo, Pengfei Gu
Shikimate kinase (SK), is the fifth bacterial enzyme involved in the shikimate pathway for biosynthesis of life indispensable components, such as aromatic amino acids. Absence of shikimate pathway in human makes SK an attractive target for rational design of drug toward pathogenesis bacteria, such as Mycobacterium tuberculosis and Helicobacter pylori. However, effective inhibitor of SK (e.g., transition state analogue) is still not available in the market due to (at least partly) the lack of knowledge on the catalytic mechanism and the nature of the rate-limiting transition state...
September 18, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28924391/snp-rs3202538-in-3-utr-region-of-erbb3-regulated-by-mir-204-and-mir-211-promote-gastric-cancer-development-in-chinese-population
#4
Yaxiang Shi, Xuan Chen, Biao Xi, Xiaowen Yu, Jun Ouyang, Chunxia Han, Yucheng Qin, Defeng Wu, Hong Shen
BACKGROUND/AIMS: ErbB3 is an oncogene which has proliferation and metastasis promotion effects by several signaling pathways. However, the individual expression difference regulated by miRNA was almost still unknown. We focused on the miRNAs associated SNPs in the 3'-UTR of ErbB3 to investigate the further relationship of the SNPs with miRNAs among Chinese gastric cancer (GC) patients. METHODS: We performed case-control study including 851 GC patients and 799 cancer-free controls...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28924108/proton-pump-inhibitor-induction-of-gastric-cobblestone-like-lesions-in-the-stomach
#5
Kosuke Takahari, Ken Haruma, Hiroshi Ohtani, Sho Kiyoto, Akifumi Watanabe, Tomoari Kamada, Noriaki Manabe, Yu Hatano
Objective The long-term use of proton pump inhibitors (PPIs) may induce adverse events in many organs, including the stomach. The chronic use of PPIs has been associated with the growth of fundic gland polyps (FGPs) and of gastric black spots. This study assessed the incidence of gastric lesions with cobblestone-like appearance in PPI users. Methods The clinical characteristics and endoscopic findings of patients who underwent upper gastrointestinal endoscopy after using PPIs for at least six months were analyzed...
September 15, 2017: Internal Medicine
https://www.readbyqxmd.com/read/28924022/pan-genomic-analyses-identify-key-helicobacter-pylori-pathogenic-loci-modified-by-carcinogenic-host-microenvironments
#6
Jennifer M Noto, Abha Chopra, John T Loh, Judith Romero-Gallo, M Blanca Piazuelo, Mark Watson, Shay Leary, Amber C Beckett, Keith T Wilson, Timothy L Cover, Simon Mallal, Dawn A Israel, Richard M Peek
OBJECTIVE: Helicobacter pylori is the strongest risk factor for gastric cancer; however, the majority of infected individuals do not develop disease. Pathological outcomes are mediated by complex interactions among bacterial, host and environmental constituents, and two dietary factors linked with gastric cancer risk are iron deficiency and high salt. We hypothesised that prolonged adaptation of H. pylori to in vivo carcinogenic microenvironments results in genetic modification important for disease...
September 18, 2017: Gut
https://www.readbyqxmd.com/read/28922727/the-relevance-of-gastric-cancer-biomarkers-in-prognosis-and-pre-and-post-chemotherapy-in-clinical-practice
#7
REVIEW
Muhammad Abbas, Murad Habib, Muhammad Naveed, Kumaragurubaran Karthik, Kuldeep Dhama, Meiqi Shi, Chen Dingding
Gastric cancer (GC) is one among the major cancer types, causing human deaths and present noticeable heterogeneity. The incidences and mortality rates are higher in males in comparison to females with a male to female ratio of 2.3:1. A lot of studies have revealed out the molecular basis, pathogenesis, invasion and metastasis related findings of gastric stomach cancer. Present review encompasses the salient information on various biomarkers for the early diagnosis, treatment and prognosis of gastric cancer elaborate the clinical importance of serum tumor markers in patients with this cancer as well as checking the growths, together with epigenetic changes and genetic polymorphisms...
September 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28922433/bismuth-based-quadruple-therapy-following-h-pylori-eradication-failures-a-multicenter-study-in-clinical-practice
#8
Angelo Zullo, Vincenzo De Francesco, Annamaria Bellesia, Roberto Vassallo, Audenzio D'Angelo, Giuseppe Scaccianoce, Rodolfo Sacco, Giampaolo Bresci, Annarita Eramo, Anna Tanzilli, Lorenzo Ridola, Domenico Alvaro, Claudio Londoni, Gianfranco Brambilla, Raffaele Manta, Agostino Di Ciaula, Piero Portincasa
BACKGROUND AND AIMS: Helicobacter pylori (H. pylori) eradication in patients who failed one or more therapeutic attempts remains challenging. This study aimed to assess the efficacy of three-in-one capsules bismuth-based quadruple therapy (Pylera®) in these patients managed in clinical practice. METHODS: This was a prospective, open-label, multicenter study enrolling consecutive, adult patients with persistent H. pylori infection following at least one standard therapy...
September 2017: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/28920420/metachronous-gastric-cancer-following-curative-endoscopic-resection-of-early-gastric-cancer
#9
Seiichiro Abe, Ichiro Oda, Takeyoshi Minagawa, Masau Sekiguchi, Satoru Nonaka, Haruhisa Suzuki, Shigetaka Yoshinaga, Amit Bhatt, Yutaka Saito
This review article summarizes knowledge about metachronous gastric cancer (MGC) occurring after curative endoscopic resection (ER) of early gastric cancer (EGC), treatment outcomes of patients who developed MGC, and efficacy of Helicobacter pylori eradication to prevent MGC. The incidence of MGC following curative ER increases over time and is higher than in patients undergoing gastrectomy. Increasing age and multifocal EGC are independent risk factors for developing MGC. An MGC following curative ER is usually a small (<20 mm) and differentiated intramucosal cancer...
September 18, 2017: Clinical Endoscopy
https://www.readbyqxmd.com/read/28919599/clinico-biochemical-profile-of-women-with-hyperemesis-gravidarum-admitted-in-a-tertiary-hospital
#10
S Kabir, M S Basher, H Akhter, T Latif, S N Akhter, R K Karmoker, S A Shaon, K Ahmed
Hyperemesis gravidarum is the most severe form of nausea and vomiting in pregnancy with poor pregnancy outcome. Hormonal changes, psychological and immunological factors are attributed to the condition. Recently, prevalence of Helicobacter pylori among women with Hyperemesis gravidarum has been revealed. A descriptive, cross-sectional study was carried out at antenatal ward, Department of Obstetrics and Gynaecology, Mymensingh Medical College Hospital, Mymensingh among thirty-six purposively selected patients with Hyperemesis gravidarum to assess the clinic-biochemical profile...
July 2017: Mymensingh Medical Journal: MMJ
https://www.readbyqxmd.com/read/28918609/associations-among-gastric-juice-ph-atrophic-gastritis-intestinal-metaplasia-and-helicobacter-pylori-infection
#11
Jihee Sung, Nayoung Kim, Jongchan Lee, Young-Jae Hwang, Hyoung Woo Kim, Jung Wha Chung, Jin-Wook Kim, Dong Ho Lee
Background/Aims: Gastric juice plays a crucial role in the physiology of the stomach. The aim of this study is to evaluate associations among the pH of gastric juice, atrophic gastritis (AG), intestinal metaplasia (IM), pepsinogen, and Helicobacter pylori infection. Methods: Gastric biopsies and juice were collected from 46 subjects who underwent endoscopies at Seoul National University Bundang Hospital between November 2011 and March 2013. H. pylori, AG and IM were evaluated, and pepsinogen I or II, I/II ratio and interleukin (IL)-1β levels were measured...
September 19, 2017: Gut and Liver
https://www.readbyqxmd.com/read/28917836/erythromycin-encapsulation-in-nanoemulsion-based-delivery-systems-for-treatment-of-helicobacter-pylori-infection-protection-and-synergy
#12
Le Tuyet Chau Tran, Claire Gueutin, Ghislaine Frebourg, Christophe Burucoa, Vincent Faivre
Poorly water-soluble and unstable compounds are difficult to develop as drug products using conventional formulation techniques. The aim of the present study was to develop and evaluate a nanoformulation prepared by a hot high-pressure homogenization method, which was a scalable and solvent-free process. We successfully prepared stable nanodispersions to protect a labile antibiotic, erythromycin. The mean diameter of the dispersed droplets was approximately 150 nm, and size distribution was unimodal. Dispersion was physically stable at room temperature for over six months...
September 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28914849/-analysis-of-the-clinical-efficiency-of-eradication-therapy-in-patients-with-coronary-heart-disease-associated-with-gastroduodenal-pathology
#13
Zh G Simonova, A K Martusevich, E I Tarlovskaya
AIM: To comparatively analyze the clinical efficiency of eradiation therapy (ET) in patients with coronary heart disease (CHD) concurrent with gastroduodenal pathology (GDP). SUBJECTS AND METHODS: The study was conducted in three steps. In Step 1, 1588 patients with chronic CHD were examined. In Step 2, the characteristics of the course of CHD concurrent with Helicobacter pylori-associated GDP in 147 patients with these conditions compared to the same number of CHD patients without GDP...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28914844/-molecular-genetic-predictors-of-resistance-to-anti-helicobacter-pylori-therapy
#14
I V Maev, D N Andreev
In current clinical practice, there is no optimal empirical therapy for Helicobacter pylori (H. pylori) infection and there is a progressive decrease in the efficiency of classical eradication therapy (ET) regimens. The variability in the efficiency of ET in a specific patient is largely due to the heterogeneous molecular genetic mechanisms underlying the resistance of the microorganism to the components of the treatment regimens. The basis of the mechanisms for antibiotic resistance in H. pylori is mainly the point mutations in some genes, which determine alterations in the mechanisms of action of drugs, such as clarithromycin (domain V of 23S rRNA), metronidazole (rdxA, frxA), amoxicillin (pbp1A), tetracycline (16S rRNA), and levofloxacin (gyrA)...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28913872/high-primary-antibiotic-resistance-of-helicobacter-pylori-strains-isolated-from-dyspeptic-patients-a-prevalence-cross-sectional-study-in-spain
#15
Fernando Macías-García, José Llovo-Taboada, Mario Díaz-López, Iria Bastón-Rey, Juan Enrique Domínguez-Muñoz
BACKGROUND: The rate of H. pylori resistance to different antibiotics is increasing and determines the selection of eradication therapy. The aim of this study was to determine the resistance patterns of H. pylori strains in our area. METHODS: Biopsies from gastric corpus for microbiological culture and antibiotic resistance were obtained in patients undergoing upper gastrointestinal endoscopy for dyspepsia. Selective Agar Pylori for isolation of the bacteria and Agar Mueller-Hinton supplemented with blood to test the sensitivity to antibiotics were used...
September 15, 2017: Helicobacter
https://www.readbyqxmd.com/read/28913339/ulcerative-gastritis-and-esophagitis-in-two-children-with-sarcina-ventriculi-infection
#16
Tim G J de Meij, Michiel P van Wijk, Aart Mookhoek, Andries E Budding
Sarcina ventriculi is a Gram-positive, obligate anaerobic coccus, with a characteristic morphology. Only 22 cases of human infections by this microorganism, including 7 in children, have been reported in literature so far. Affected subjects usually present with abdominal pain, nausea, vomiting, and delayed gastric emptying. However, life-threatening complications, like emphysematous gastritis and gastric perforation have also been described. Gastroparesis and gastric outlet obstruction have been considered as a potential etiologic factor...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28912838/phylogenomics-of-colombian-helicobacter-pylori-isolates
#17
Andrés Julián Gutiérrez-Escobar, Esperanza Trujillo, Orlando Acevedo, María Mercedes Bravo
BACKGROUND: During the Spanish colonisation of South America, African slaves and Europeans arrived in the continent with their corresponding load of pathogens, including Helicobacter pylori. Colombian strains have been clustered with the hpEurope population and with the hspWestAfrica subpopulation in multilocus sequence typing (MLST) studies. However, ancestry studies have revealed the presence of population components specific to H. pylori in Colombia. The aim of this study was to perform a thorough phylogenomic analysis to describe the evolution of the Colombian urban H...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28912586/three-dimensional-combined-biomarkers-assay-could-improve-diagnostic-accuracy-for-gastric-cancer
#18
Liping Sun, Huakang Tu, Tiejun Chen, Quan Yuan, Jingwei Liu, Nannan Dong, Yuan Yuan
So far, stomach-specific biomarkers, gastric cancer(GC)-related environmental factors, and cancer-associated biomarkers are three major classes of serological biomarkers with GC warning potential, joint detection of which is expected to increase the diagnosis efficiency. We investigated whether the combination of serum pepsinogens(PGs), IgG anti-Helicobacter pylori (HpAb), and osteopontin (OPN) can be used as a panel for GC diagnose. Serum was collected from 365 GC patients and 729 healthy individuals,furtherly 332 cases and 332 age- and sex-matched controls were selected for the matched analysis...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28910871/-mucosa-associated-lymphoid-tissue-lymphoma-in-children-and-adolescents-a-clinicopathologic-study-of-5-cases
#19
J Hu, J L Xie, Z J Zhou, X G Zhou
Objective: To investigate the pathological features and clinical manifestations of mucosa-associated lymphoid tissue (MALT) lymphoma in children and adolescents. Methods: Five cases of MALT lymphoma in children were investigated by morphology and immunophenotyping along with clinical follow-up. Results: Five cases of MALT lymphoma occurred in the antrum, orbit, parotid gland and nasopharynx. All patients had no B symptoms and only one patient showed a local mass with ulcer. One case presented with cervical lymph node enlargement, and 4 cases showed no evidence of lymphadenopathy...
September 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28902909/the-cytoprotective-protein-clusterin-is-overexpressed-in-hypergastrinemic-rodent-models-of-oxyntic-preneoplasia-and-promotes-gastric-cancer-cell-survival
#20
Pål Vange, Torunn Bruland, Berit Doseth, Reidar Fossmark, Mirta M L Sousa, Vidar Beisvag, Øystein Sørdal, Gunnar Qvigstad, Helge L Waldum, Arne K Sandvik, Ingunn Bakke
The cytoprotective protein clusterin is often dysregulated during tumorigenesis, and in the stomach, upregulation of clusterin marks emergence of the oxyntic atrophy (loss of acid-producing parietal cells)-associated spasmolytic polypeptide-expressing metaplasia (SPEM). The hormone gastrin is important for normal function and maturation of the gastric oxyntic mucosa and hypergastrinemia might be involved in gastric carcinogenesis. Gastrin induces expression of clusterin in adenocarcinoma cells. In the present study, we examined the expression patterns and gastrin-mediated regulation of clusterin in gastric tissue from: humans; rats treated with proton pump (H+/K+-ATPase) inhibitors and/or a gastrin receptor (CCK2R) antagonist; H+/K+-ATPase β-subunit knockout (H/K-β KO) mice; and Mongolian gerbils infected with Helicobacter pylori and given a CCK2R antagonist...
2017: PloS One
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