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https://www.readbyqxmd.com/read/28432224/a-bacterial-cause-of-cancer-an-historical-essay
#1
Marshall A Lichtman
This article reviews the history of the discovery of microbes that increase the risk of cancer of some tissues with a special emphasis on the bacterium Helicobacter pylori and the role played by two Australian physicians, neither schooled in research, who had open minds about the shibboleth that mycobacteria (acid-fast organisms) can survive the acid environment of the stomach, but that other pathogenic bacteria cannot. They discovered one of the most important human pathogens, Helicobacter pylori, and showed it capable of inducing severe gastric inflammatory disease...
April 21, 2017: Oncologist
https://www.readbyqxmd.com/read/28430970/helicobacter-pylori-outer-membrane-vesicles-inhibit-human-t-cell-responses-via-induction-of-monocyte-cox-2-expression
#2
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/28430952/a-strategy-for-helicobacter-immunohistochemistry-utilization-in-pediatric-practice-%C3%A2-insights-from-morphologic-and-cost-benefit-analyses
#3
Miriam R Conces, Christina A Arnold, Peter B Baker, Christopher M Carter, Bonita Fung, Vinay Prasad, Michael A Arnold
Objectives: Recent studies in adults have examined the utility of immunohistochemistry (IHC) in detecting Helicobacter in gastric biopsy specimens and reached differing conclusions. Dedicated cost-benefit analysis of Helicobacter IHC in pediatric gastric biopsy specimens has not been performed. Methods: From 1,955 pediatric gastric biopsies in a 1-year period, we identified 63 Helicobacter -positive and 120 Helicobacter -negative biopsy specimens. All cases were scored according to the Updated Sydney System for the severity of inflammation...
November 1, 2016: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28429247/a-review-of-the-novel-application-and-potential-adverse-effects-of-proton-pump-inhibitors
#4
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
#5
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
#6
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
#7
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/28426827/correction-helicobacter-pylori-bab-paralog-distribution-and-association-with-caga-vaca-and-homa-b-genotypes-in-american-and-south-korean-clinical-isolates
#8
Aeryun Kim, Stephanie L Servetas, Jieun Kang, Jinmoon Kim, Sungil Jang, Ho Jin Cha, Wan Jin Lee, June Kim, Judith Romero-Gallo, Richard M Peek, D Scott Merrell, Jeong-Heon Cha
[This corrects the article DOI: 10.1371/journal.pone.0137078.].
2017: PloS One
https://www.readbyqxmd.com/read/28425653/endoscopic-gastric-mucosal-atrophy-distinguishes-the-characteristics-of-superficial-esophagogastric-junction-adenocarcinoma
#9
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
#10
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/28425141/efficacy-of-helicobacter-pylori-eradication-therapies-in-korea-a-systematic-review-and-network-meta-analysis
#11
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
#12
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/28423364/increased-expression-of-deleted-in-malignant-brain-tumors-dmbt1-gene-in-precancerous-gastric-lesions-findings-from-human-and-animal-studies
#13
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
#14
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/28422853/gastritis-in-patients-undergoing-sleeve-gastrectomy-prevalence-ethnic-distribution-and-impact-on-glycemic
#15
Lea Rath-Wolfson, Roy Varona, Golan Bubis, Alexander Tatarov, Rumelia Koren, Edward Ram
Laparoscopic sleeve gastrectomy (LSG) is a therapeutic option in severely obese patients. The aim of this study was to evaluate the presence of Helicobacter pylori (HP) gastritis and non-Helicobacter gastritis in the gastrectomy specimens, and its association to other variables.One hundred six sleeve gastrectomy specimens were examined histopathologically for the presence of gastritis and its relation to other factors like ethnicity, glycemic control, and postoperative complications.Twelve patients had HP gastritis, 39 had non-HP gastritis, and 55 had normal mucosa...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28422059/mismatch-between-probiotic-benefits-in-trials-versus-food-products
#16
Mary J Scourboutakos, Beatriz Franco-Arellano, Sarah A Murphy, Sheida Norsen, Elena M Comelli, Mary R L'Abbé
Probiotic food products contain a variety of different bacterial strains and may offer different health effects. The objective was to document the prevalence and dosage of probiotic strains in the Canadian food supply and to review the literature investigating these strains in order to understand what health benefits these products may offer. The Food Label Information Program was used to identify probiotic-containing products in the food supply. PubMed, Web of Science, and Embase were searched for randomized controlled trials that tested the health effects of these strains in humans...
April 19, 2017: Nutrients
https://www.readbyqxmd.com/read/28421114/status-of-epstein-barr-virus-coinfection-with-helicobacter-pylori-in-gastric-cancer
#17
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
https://www.readbyqxmd.com/read/28419119/plasma-ghrelin-level-and-plasma-ghrelin-obestatin-ratio-are-related-to-intestinal-metaplasia-in-elderly-patients-with-functional-dyspepsia
#18
Su Hwan Kim, Ji Won Kim, Junsu Byun, Ji Bong Jeong, Byeong Gwan Kim, Kook Lae Lee
BACKGROUND: Whether plasma ghrelin/obestatin levels are associated with Helicobacter pylori (H. pylori) infection, subtypes of functional dyspepsia (FD), and gastric mucosal histology has not yet been established in elderly patients. OBJECTIVE: The aim of this study was to determine whether plasma ghrelin and obestatin levels are related to gastric mucosal histology, H. pylori infection, and FD subtypes in elderly patients with FD. METHODS: Ninety-two patients diagnosed with FD and older than 60 years (median age 69...
2017: PloS One
https://www.readbyqxmd.com/read/28418469/management-of-helicobacter-pylori-infection
#19
Robert T Kavitt, Adam S Cifu
No abstract text is available yet for this article.
April 18, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28418004/host-determinants-of-expression-of-the-helicobacter-pylori-baba-adhesin
#20
Mary E Kable, Lori M Hansen, Cathy M Styer, Samuel L Deck, Olena Rakhimova, Anna Shevtsova, Kathryn A Eaton, Miriam E Martin, Pär Gideonsson, Thomas Borén, Jay V Solnick
Expression of the Helicobacter pylori blood group antigen binding adhesin A (BabA) is more common in strains isolated from patients with peptic ulcer disease or gastric cancer, rather than asymptomatic colonization. Here we used mouse models to examine host determinants that affect H. pylori BabA expression. BabA expression was lost by phase variation as frequently in WT mice as in RAG2-/- mice that do not have functional B or T cells, and in MyD88-/-, TLR2-/- and TLR4-/- mice that are defective in toll like receptor signaling...
April 18, 2017: Scientific Reports
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