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https://www.readbyqxmd.com/read/28437803/prevalence-of-helicobacter-pylori-infection-among-blood-donors-in-saxony-anhalt-germany-a-region-at-intermediate-risk-for-gastric-cancer
#1
Caspar Franck, Armin Hoffmann, Alexander Link, Christian Schulz, Kerstin Wuttig, Elke Becker, Marcell Heim, Marino Venerito, Peter Malfertheiner
Background In the federal state of Saxony-Anhalt, gastric cancer (GC) incidence ranks among the highest in Germany. Helicobacter pylori prevalence is a surrogate marker for GC risk in a given population. In 2010 we reported an H. pylori seroprevalence of 44.4 % in patients at the emergency ward of the University Hospital of Magdeburg, the capital of Saxony-Anhalt. Our aim is to update these findings in a cohort of healthy blood donors from the same region. Materials and methods The sera of 516 consecutive blood donors (40...
April 24, 2017: Zeitschrift Für Gastroenterologie
https://www.readbyqxmd.com/read/28436616/reduced-infectivity-of-waterborne-viable-but-nonculturable-helicobacter-pylori-strain-ss1-in-mice
#2
Kevin F Boehnke, Kathryn A Eaton, Clinton Fontaine, Rebecca Brewster, Jianfeng Wu, Joseph N S Eisenberg, Manuel Valdivieso, Laurence H Baker, Chuanwu Xi
BACKGROUND: Helicobacter pylori infection has been consistently associated with lack of access to clean water and proper sanitation, but no studies have demonstrated that the transmission of viable but nonculturable (VBNC) H. pylori can occur from drinking contaminated water. In this study, we used a laboratory mouse model to test whether waterborne VBNCH. pylori could cause gastric infection. MATERIALS AND METHODS: We performed five mouse experiments to assess the infectivity of VBNCH...
April 24, 2017: Helicobacter
https://www.readbyqxmd.com/read/28436598/the-expression-of-helicobacter-pylori-tfs-plasticity-zone-cluster-is-regulated-by-ph-and-adherence-and-its-composition-is-associated-with-differential-gastric-il-8-secretion
#3
Bruno Silva, Alexandra Nunes, Filipa F Vale, Raquel Rocha, João Paulo Gomes, Ricardo Dias, Mónica Oleastro
BACKGROUND: Helicobacter pylori virulence is associated with different clinical outcomes. The existence of an intact dupA gene from tfs4b cluster has been suggested as a predictor for duodenal ulcer development. However, the role of tfs plasticity zone clusters in the development of ulcers remains unclear. We studied several H. pylori strains to characterize the gene arrangement of tfs3 and tfs4 clusters and their impact in the inflammatory response by infected gastric cells. METHODS: The genome of 14 H...
April 24, 2017: Helicobacter
https://www.readbyqxmd.com/read/28434988/genotyping-of-helicobacter-pylori-shows-high-diversity-of-strains-circulating-in-central-vietnam
#4
Trung Nam Phan, Antonella Santona, Van Huy Tran, Thi Nhu Hoa Tran, Le Van An, Pietro Cappuccinelli, Salvatore Rubino, Bianca Paglietti
In Vietnam, the high prevalence of Helicobacter pylori infection represents a serious health problem. Virulence genes of H. pylori have been associated to increased risk of severe gastrointestinal diseases and the genetic background differs in geographical areas. We investigated cagA and vacA genotypes of H. pylori from dyspeptic patients from central Vietnam and the correlation with clinical outcomes; we also performed sequencing analysis of partial cagA gene. Overall, 84% of strains were cagA-positive, 75% were East-Asian type with a prevalence of vacAs1i1m1 and vacAs1i1m2 genotypes (66...
April 18, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28434172/lactobacillus-paracasei-strain-06tca19-suppresses-inflammatory-chemokine-induced-by-helicobacter-pylori-in-human-gastric-epithelial-cells
#5
Shiro Takeda, Keiji Igoshi, Chuluunbat Tsend-Ayush, Tsendesuren Oyunsuren, Ryoichi Sakata, Yasuhiro Koga, Yuo Arima, Masahiko Takeshita
Helicobacter (H.) pylori infection is an important risk factor for gastric cancer that causes gastric inflammation. Inflammatory chemokines such as interleukin (IL)-8 and regulated on activation normal T cell expressed and secreted (RANTES) are elevated in the gastric mucosa by H. pylori. This study aimed to investigate the effects of Lactobacillus paracasei strain 06TCa19, a probiotic strain, on IL-8 and RANTES expression and production induced by H. pylori using human gastric epithelial cell lines. Strain 06TCa19 was shown to suppress H...
April 22, 2017: Human Cell
https://www.readbyqxmd.com/read/28433795/helicobacter-pylori-cagl-amino-acid-polymorphism-d58e59-pave-the-way-toward-peptic-ulcer-disease-while-n58e59-is-associated-with-gastric-cancer-in-north-of-iran
#6
Mina Rezaee Cherati, Javad Shokri-Shirvani, Ahmad Karkhah, Ramzan Rajabnia, Hamid Reza Nouri
The cagL protein of Helicobacter pylori involving in pathogenesis of gastroduodenal disorders. Therefore, the current study was conducted to determine the cagL amino acid polymorphisms in patients with gastric diseases. One hundred gastric biopsies were collected from gastritis, peptic ulcer (PUD) and gastric cancer (GC) patients and were screened for cagL using polymerase chain reaction (PCR). Also, sequence variations of the cagL were assessed via sequence translation. The cagL geneopositivity was 71.6% in patients were infected with H...
April 19, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28430970/helicobacter-pylori-outer-membrane-vesicles-inhibit-human-t-cell-responses-via-induction-of-monocyte-cox-2-expression
#7
Barry D Hock, Judith L McKenzie, Jacqueline I Keenan
The modulation of T cell responses by Helicobacter pylori is thought to potentiate both H. pylori persistence and development of gastric pathologies including cancer. Release of outer membrane vesicles (OMV) by H. pylori provides a potential vehicle for modulation of the immune system. Although OMV are thought to have T cell suppressive activity this has not yet been demonstrated. Their suppressive activity was investigated in this study using the responses of peripheral blood mononuclear cells (PBMC) to T cell stimuli as a readout...
April 18, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28429247/a-review-of-the-novel-application-and-potential-adverse-effects-of-proton-pump-inhibitors
#8
REVIEW
Li-Yuan Yu, Lu-Ning Sun, Xue-Hui Zhang, Yue-Qi Li, Lei Yu, Zi-Qing-Yun Yuan, Ling Meng, Hong-Wen Zhang, Yong-Qing Wang
Proton pump inhibitors (PPIs) are known as a class of pharmaceutical agents that target H(+)/K(+)-ATPase, which is located in gastric parietal cells. PPIs are widely used in the treatment of gastric acid-related diseases including peptic ulcer disease, erosive esophagitis and gastroesophageal reflux disease, and so on. These drugs present an excellent safety profile and have become one of the most commonly prescribed drugs in primary and specialty care. Except for gastric acid-related diseases, PPIs can also be used in the treatment of Helicobacter pylori infection, viral infections, respiratory system diseases, cancer and so on...
April 20, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/28427896/toll-like-receptor-2-an-important-immunomodulatory-molecule-during-helicobacter-pylori-infection
#9
REVIEW
Maryam Nemati, Tiziana Larussa, Hossein Khorramdelazad, Merat Mahmoodi, Abdollah Jafarzadeh
Toll like receptors (TLRs) are an essential subset of pathogen recognition receptors (PRRs) which identify the microbial components and contribute in the regulation of innate and adaptive immune responses against the infectious agents. The TLRs, especially TLR2, TLR4, TLR5 and TLR9, participate in the induction of immune response against H. pylori. TLR2 is expressed on a number of immune and non-immune cells and recognizes a vast broad of microbial components due to its potential to form heterodimers with other TLRs, including TLR1, TLR6 and TLR10...
April 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/28427781/smoking-increases-the-likelihood-of-helicobacter-pylori-treatment-failure
#10
David Itskoviz, Doron Boltin, Haim Leibovitzh, Tsachi Tsadok Perets, Doron Comaneshter, Arnon Cohen, Yaron Niv, Zohar Levi
BACKGROUND AND AIMS: Data regarding the impact of smoking on the success of Helicobacter pylori (H. pylori) eradication are conflicting, partially due to the fact that sociodemographic status is associated with both smoking and H. pylori treatment success. We aimed to assess the effect of smoking on H. pylori eradication rates after controlling for sociodemographic confounders. METHODS: Included were subjects aged 15 years or older, with a first time positive C(13)-urea breath test (C(13)-UBT) between 2007 to 2014, who underwent a second C(13)-UBT after receiving clarithromycin-based triple therapy...
March 27, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28427431/from-inflammation-to-gastric-cancer-the-importance-of-hedgehog-gli-signaling-in-helicobacter-pylori-induced-chronic-inflammatory-and-neoplastic-diseases
#11
REVIEW
Silja Wessler, Linda M Krisch, Dominik P Elmer, Fritz Aberger
Infections with the human pathogen Helicobacter pylori (H. pylori) are closely associated with the development of inflammatory disorders and neoplastic transformation of the gastric epithelium. Drastic changes in the micromilieu involve a complex network of H. pylori-regulated signal transduction pathways leading to the release of proinflammatory cytokines, gut hormones and a wide range of signaling molecules. Besides controlling embryonic development, the Hedgehog/GLI signaling pathway also plays important roles in epithelial proliferation, differentiation, and regeneration of the gastric physiology, but also in the induction and progression of inflammation and neoplastic transformation in H...
April 20, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28425653/endoscopic-gastric-mucosal-atrophy-distinguishes-the-characteristics-of-superficial-esophagogastric-junction-adenocarcinoma
#12
Noriya Uedo, Toshiyuki Yoshio, Shigetaka Yoshinaga, Manabu Takeuchi, Waku Hatta, Tomonori Yano, Tokuma Tanuma, Osamu Goto, Akiko Takahashi, Daniel Tong, Yeong Yeh Lee, Yoshiko Nakayama, Shin Ichihara, Takuji Gotoda
BACKGROUND AND AIM: Western studies have suggested two distinct etiologies of esophagogastric junction (EGJ) cancer: Helicobacter pylori-associated atrophic gastritis and non-atrophic gastric mucosa resembling esophageal adenocarcinoma. The present study investigated whether endoscopic gastric mucosal atrophy can distinguish between these two types of EGJ adenocarcinoma. METHODS: Data were collected from patients with Siewert type II, T1 EGJ adenocarcinoma who underwent endoscopic or surgical resection at eight Japanese institutions in 2010-2015...
April 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28425268/efficient-production-of-nanobodies-against-urease-activity-ofhelicobacter-pylori-in-pichia-pastoris
#13
Shahrbanoo Pourasadi, Seyed Latif Mousavi Gargari, Masoumeh Rajabibazl, Shahram Nazarian
BACKGROUND/AIM: Helicobacter pylori is a major health problem. One of the therapeutic approaches is administration of antibody against H. pylori. The methylotrophic Pichia pastoris is a suitable host for expression of recombinant antibody fragments. The aims of this study were the expression and the evaluation of camelid nanobody in the yeast Pichia pastoris. MATERIALS AND METHODS: The camelid-derived heavy-chain antibody (nanobody) against the UreC subunit of urease from H...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28425257/role-of-hygienic-factors-in-the-etiology-of-allergic-disorders-in-children
#14
Şule Yeşil, Ahmet Kan, Olkar Abdulmajed, Arzu Bakirtaş, Nedim Sultan, Sadık M Demirsoy
BACKGROUND/AIM: We investigated the role of body flora and chronic inflammatory infections in the etiology of allergic disorders in Turkish children. MATERIALS AND METHODS: Forty pediatric asthma patients with positive skin prick tests and 40 age-matched healthy subjects with negative skin prick tests were enrolled in this cross-sectional study. Serum H. pylori IgG, viral hepatitis serology, IL-10, and TGF-beta levels were measured. Stool and throat cultures were taken and tested for occurrence of microorganisms...
April 18, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/28425141/efficacy-of-helicobacter-pylori-eradication-therapies-in-korea-a-systematic-review-and-network-meta-analysis
#15
REVIEW
Yoon Suk Jung, Chan Hyuk Park, Jung Ho Park, Eunwoo Nam, Hang Lak Lee
BACKGROUND: The efficacy of Helicobacter pylori eradication regimens may depend on the country where the studies were performed because of the difference in antibiotic resistance. We aimed to analyze the efficacy of H. pylori eradication regimens in Korea where clarithromycin resistance rate is high. METHODS: We searched for all relevant randomized controlled trials published until November 2016 that investigated the efficacy of H. pylori eradication therapies in Korea...
April 19, 2017: Helicobacter
https://www.readbyqxmd.com/read/28424674/global-fecal-and-plasma-metabolic-dynamics-related-to-helicobacter-pylori-eradication
#16
Theresa Wan-Chen Yap, Alex Hwong-Ruey Leow, Ahmad Najib Azmi, Damien L Callahan, Guillermo I Perez-Perez, Mun-Fai Loke, Khean-Lee Goh, Jamuna Vadivelu
Background:Helicobacter pylori colonizes the gastric mucosa of more than half of the world's population. There is increasing evidence H. pylori protects against the development of obesity and childhood asthma/allergies in which the development of these diseases coincide with transient dysbiosis. However, the mechanism underlying the association of H. pylori eradication with human metabolic and immunological disorders is not well-established. In this study, we aimed to investigate the local and systemic effects of H...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28423569/accurate-prediction-of-protein-protein-interactions-by-integrating-potential-evolutionary-information-embedded-in-pssm-profile-and-discriminative-vector-machine-classifier
#17
Zheng-Wei Li, Zhu-Hong You, Xing Chen, Li-Ping Li, De-Shuang Huang, Gui-Ying Yan, Ru Nie, Yu-An Huang
Identification of protein-protein interactions (PPIs) is of critical importance for deciphering the underlying mechanisms of almost all biological processes of cell and providing great insight into the study of human disease. Although much effort has been devoted to identifying PPIs from various organisms, existing high-throughput biological techniques are time-consuming, expensive, and have high false positive and negative results. Thus it is highly urgent to develop in silico methods to predict PPIs efficiently and accurately in this post genomic era...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28423364/increased-expression-of-deleted-in-malignant-brain-tumors-dmbt1-gene-in-precancerous-gastric-lesions-findings-from-human-and-animal-studies
#18
Jone Garay, M Blanca Piazuelo, Lizbeth Lopez-Carrillo, Yelda A Leal, Sumana Majumdar, Li Li, Nataly Cruz-Rodriguez, Silvia J Serrano-Gomez, Carlos S Busso, Barbara G Schneider, Alberto G Delgado, Luis E Bravo, Angela M Crist, Stryder M Meadows, M Constanza Camargo, Keith T Wilson, Pelayo Correa, Jovanny Zabaleta
Helicobacter pylori infection triggers a cascade of inflammatory stages that may lead to the appearance of non-atrophic gastritis, multifocal atrophic, intestinal metaplasia, dysplasia, and cancer. Deleted in malignant brain tumors 1 (DMBT1) belongs to the group of secreted scavenger receptor cysteine-rich proteins and is considered to be involved in host defense by binding to pathogens. Initial studies showed its deletion and loss of expression in a variety of tumors but the role of this gene in tumor development is not completely understood...
April 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/28422951/helicobacter-pylori-infection-and-serum-leptin-obestatin-and-ghrelin-levels-in-mexican-schoolchildren
#19
Carolina Romo-González, Eugenia Mendoza, Robertino M Mera, Rafael Coria-Jiménez, Patricia Chico-Aldama, Rita Gomez-Diaz, Ximena Duque
BACKGROUND: There is little information about the possible role of H. pylori infection on appetite-regulating peptides in children. This study evaluated the association between H. pylori infection and serum levels of ghrelin, leptin, and obestatin in schoolchildren. METHODS: One hundred seventy-eight schoolchildren, students at boarding schools in Mexico City, participated. H. pylori infection status was determined every six months for one year by a breath test using (13)C-urea; schoolchildren with consistently positive or negative results were selected to participate...
April 19, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28421114/status-of-epstein-barr-virus-coinfection-with-helicobacter-pylori-in-gastric-cancer
#20
REVIEW
Shyam Singh, Hem Chandra Jha
Epstein-Barr virus is a ubiquitous human herpesvirus whose primary infection causes mononucleosis, Burkett's lymphoma, nasopharyngeal carcinoma, autoimmune diseases, and gastric cancer (GC). The persistent infection causes malignancies in lymph and epithelial cells. Helicobacter pylori causes gastritis in human with chronic inflammation. This chronic inflammation is thought to be the cause of genomic instability. About 45%-word population have a probability of having both pathogens, namely, H. pylori and EBV...
2017: Journal of Oncology
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