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https://www.readbyqxmd.com/read/28742407/tlr5-polymorphisms-rs2072493-rs5744174-and-rs5744168-are-not-genetic-risk-factors-for-chronic-helicobacter-pylori-infection-in-indian-tamils
#1
Vaishnavi Goda, Megala Jayaraman, Rekha Loganathan, Mehnaz Nazeer, Mohammed Ali, Premkumar Karunakaran, Panneer Devaraju
The incidence of Helicobacter pylori (H. pylori) infection and gastric cancer is on the rise in India, and the genetic factors influencing the increased susceptibility in Indian population remain obscure. Toll-like receptors (TLRs) play a major role in innate immune system and genetic polymorphisms affecting their function were reported to enhance the risk for H. pylori infection. Seventy-seven patients (n = 77) diagnosed with H. pylori infection and 230 healthy subjects were recruited in this study. The rs2072493, rs5744174, and rs5744168 polymorphisms within TLR5 gene were genotyped using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and Tetra-ARMS PCR genotyping techniques...
July 25, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/28739826/interleukin-17c-in-human-helicobacter-pylori-gastritis
#2
Shingo Tanaka, Hiroyuki Nagashima, Modesto Cruz, Tomohisa Uchida, Takahiro Uotani, José A Jiménez Abreu, Varocha Mahachai, Ratha-Korn Vilaichone, Thawee Ratanachu-Ek, Lotay Tshering, David Y Graham, Yoshio Yamaoka
The interleukin-17 (IL-17) family of cytokines (IL-17A-F) is involved in many inflammatory diseases. Although IL-17A is recognized as being involved in the pathophysiology of H. pylori-associated diseases, the role of other IL-17 cytokine family members remains unclear. Microarray analysis of IL-17 family cytokines was performed in H. pylori-infected and uninfected gastric biopsy specimens. IL-17C mRNA was upregulated approximately 4.5-fold in H. pylori-infected gastric biopsies. This was confirmed by quantitative reverse transcriptase-polymerase chain reaction in infected and uninfected gastric mucosa obtained from Bhutan and from the Dominican Republic...
July 24, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28739267/h-pylori-seroprevalence-and-risk-of-diabetes-an-ancillary-case-control-study-nested-in-the-diabetes-prevention-program
#3
Saud Alzahrani, Jason Nelson, Steven F Moss, Jessica K Paulus, William C Knowler, Anastassios G Pittas
OBJECTIVE: To determine the association between H. pylori infection and risk of incident diabetes in adults at high risk for diabetes who participated in the Diabetes Prevention Program (DPP) study. METHODS: In a nested case-control study conducted among 421 adults with newly diagnosed diabetes and 421 matched controls, we examined the association between serological status of H. pylori at baseline and risk of incident diabetes over a mean follow-up period of 2...
June 3, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/28737284/antibody-reactivity-against-helicobacter-pylori-proteins-in-a-sample-of-the-spanish-adult-population-in-2008-2013
#4
Nerea Fernández-de-Larrea, Angelika Michel, Beatriz Romero, Julia Butt, Michael Pawlita, Beatriz Pérez-Gómez, Gemma Castaño-Vinyals, Victor Moreno, Vicente Martín, Pilar Amiano, Jesús Castilla, Guillermo Fernández-Tardón, Trinidad Dierssen-Sotos, Juan Clofent, Juan Alguacil, José María Huerta, José Juan Jiménez-Moleón, Aurelio Barricarte, Amaia Molinuevo, Tania Fernández-Villa, Delphine Casabonne, Ángeles Sierra, Manolis Kogevinas, Silvia de Sanjosé, Marina Pollán, Rosa Del Campo, Tim Waterboer, Nuria Aragonés
BACKGROUND: Differences in Helicobacter pylori protein expression have been related to the risk of severe gastric diseases. In Spain, a marked geographic pattern in gastric cancer mortality has long been reported. OBJECTIVE: To characterize antibody reactivity patterns against 16 H. pylori proteins, by age, sex, and region of birth, in a large sample of the Spanish adult population. MATERIALS AND METHODS: Antibody reactivity was quantified by H...
July 24, 2017: Helicobacter
https://www.readbyqxmd.com/read/28736845/cytokine-expression-associated-with-helicobacter-pylori-and-epstein-barr-virus-infection-in-gastric-carcinogenesis
#5
Jung Yeon Kim, Byung-Noe Bae, Guhyun Kang, Hyun-Jung Kim, Kyeongmee Park
Helicobacter pylori and Epstein-Barr virus (EBV) infection, and associated cytokines are involved in gastric carcinogenesis. We investigated the expression of these cytokines and their relationship with clinicopathological characteristics. The study included specimens from 207 patients with gastric adenocarcinoma, 56 with chronic gastritis, 32 with metaplasia, and 30 with low-grade epithelial dysplasia. Tissue microarrays were constructed and immunohistochemical staining for IL-1β, IL-6, IL-10, IL-17, p16, p21, TNF-α, and TNFR1 was performed...
July 24, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28736645/effect-of-helicobacter-pylori-infection-on-outcomes-in-resected-gastric-and-gastroesophageal-junction-cancer
#6
Jennifer M Kolb, Umut Ozbek, Noam Harpaz, Randall F Holcombe, Celina Ang
BACKGROUND: Helicobacter pylori (H pylori) infection is a known risk factor for gastric cancer (GC) and has been linked with gastroesophageal junction (GEJ) cancer. Studies examining the relationship between H. pylori infection, GC characteristics and prognosis are limited and have yielded conflicting results. We report on the clinicopathologic characteristics and oncologic outcomes of gastric and GEJ cancer patients with and without a history of H. pylori treated at our institution. METHODS: We retrospectively reviewed the medical records of patients over the age of 18 years who underwent curative resection for GEJ and GC at Mount Sinai Hospital between 2007 and 2012 who had histopathologic documentation of the presence or absence of H pylori infection...
June 2017: Journal of Gastrointestinal Oncology
https://www.readbyqxmd.com/read/28736214/genetic-variants-in-gastric-cancer-risks-and-clinical-implications
#7
REVIEW
Carolina Oliveira Gigek, Danielle Queiroz Calcagno, Lucas Trevizani Rasmussen, Leonardo Caires Santos, Mariana Ferreira Leal, Fernanda Wisnieski, Rommel Rodriguez Burbano, Laercio Gomes Lourenço, Gaspar de Jesus Lopes-Filho, Marilia Arruda Cardoso Smith
Cancer is a multifactorial disease that involves many molecular alterations. Gastric cancer (GC) is the third leading cause of cancer death worldwide. GC is a highly heterogeneous disease with different molecular and genetics features. Therefore, this review focuses on an overview of the genetic aspects of gastric cancer by highlighting the important impact and role of deletions and/or duplications of chromosomal segments, genomic variants, H. pylori infection and interleukin variants, as found in gene expression and newly proposed molecular classification studies...
July 20, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28735449/therapy-with-omeprazole-modulates-regulatory-t-cell-t-helper-17-immune-response-in-children-with-duodenal-ulcers
#8
Chuan-Ying Li, Cheng Wu
The purpose of this study was to determine the effect of omeprazole on the regulatory T cell (Treg) and T helper 17 (Th17)-mediated response in patients with duodenal ulcers (DUs). DU patients were randomly divided into omeprazole and colloid bismuth subcitrate treatment groups. The ratios of Th17 and Treg in peripheral blood mononuclear cells (PBMCs) were measured. Cytokine production and Foxp3(+)- and RORγt-positive cells were detected. The expressions of STAT3, p-STAT3, STAT5 and p-STAT5 were detected by Western blot...
July 22, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28733944/the-gastric-and-intestinal-microbiome-role-of-proton-pump-inhibitors
#9
REVIEW
Artem Minalyan, Lilit Gabrielyan, David Scott, Jonathan Jacobs, Joseph R Pisegna
PURPOSE OF REVIEW: The discovery of Helicobacter pylori and other organisms colonizing the stomach and the intestines has shed some light on the importance of microbiome in maintaining overall health and developing pathological conditions when alterations in biodiversity are present. The gastric acidity plays a crucial role in filtering out bacteria and preventing development of enteric infections. In this article, we discuss the physiology of gastric acid secretion and bacterial contribution to the composition of gastric and intestinal barriers and review the current literature on the role of proton pump inhibitors (PPIs) in the microbial biodiversity of the gastrointestinal tract...
August 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28732793/characterization-of-clarithromycin-resistant-helicobacter-pylori-strains-in-iran-a-systematic-review-and-meta-analysis
#10
REVIEW
Farzad Khademi, Amir Hossein Sahebkar, Hamid Vaez, Mohsen Arzanlou, Hadi Peeridogaheh
BACKGROUND: The high prevalence of clarithromycin-resistant strains of H. pylori is a main challenge for the successful treatment of gastrointestinal infections. Point mutations in the 23S rRNA gene are one of the main mechanisms leading to the resistance to clarithromycin in Iran. The purpose of the present review was to evaluate the prevalence of clarithromycin-resistant H. pylori strains in Iran and to identify the major molecular mechanisms of resistance in the resistant isolates...
July 18, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28732784/secondary-antibiotic-resistance-of-helicobacter-pylori-isolates-in-israeli-children-and-adults
#11
Johad Khoury, Yuval Geffen, Ron Shaul, Hisham Sholy, Yehuda Chowers, Tarek Saadi
BACKGROUND: Failure of standard therapy for H. pylori infections results primarily from increasing antibiotic resistance. Patients in Israel are referred for H. pylori culture after failure of at least two therapeutic regimens. OBJECTIVES: To estimate the prevalence of secondary antimicrobial resistance of H. pylori in Israel. METHODS: We retrospectively collected results of H. pylori cultures performed by gastric biopsies at Rambam Health Care Campus, Haifa, Israel, between the years 2012-2015...
July 18, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28732086/risk-of-stomach-cancer-in-aotearoa-new-zealand-a-m%C3%A4-ori-population-based-case-control-study
#12
Lis Ellison-Loschmann, Andrew Sporle, Marine Corbin, Soo Cheng, Pauline Harawira, Michelle Gray, Tracey Whaanga, Parry Guilford, Jonathan Koea, Neil Pearce
Māori, the indigenous people of New Zealand, experience disproportionate rates of stomach cancer, compared to non-Māori. The overall aim of the study was to better understand the reasons for the considerable excess of stomach cancer in Māori and to identify priorities for prevention. Māori stomach cancer cases from the New Zealand Cancer Registry between 1 February 2009 and 31 October 2013 and Māori controls, randomly selected from the New Zealand electoral roll were matched by 5-year age bands to cases...
2017: PloS One
https://www.readbyqxmd.com/read/28730504/changing-trends-in-stomach-cancer-throughout-the-world
#13
REVIEW
Maya Balakrishnan, Rollin George, Ashish Sharma, David Y Graham
PURPOSE OF REVIEW: The paper aims to discuss the global trends in gastric cancer incidence in relation to important factors involved in the pathogenesis of gastric cancer. RECENT FINDINGS: Despite a significant worldwide decline, gastric cancer remains a common cause of cancer death. The decline has been multifactorial and preceded the fall in Helicobacter pylori prevalence. The initial decline was associated with changes in food preservation and availability, especially of fresh fruits and vegetables, followed by a decline in the primary etiologic factor, H...
August 2017: Current Gastroenterology Reports
https://www.readbyqxmd.com/read/28730251/severe-upper-gastrointestinal-bleeding-determined-by-a-gastric-lymphoma-associated-with-helicobacter-pylori-positive-atrophic-gastritis
#14
Cosmin Vasile Obleagă, Cristin Constantin Vere, Ana Maria Pătraşcu, Emil Moraru, Antoanela Valentina Crafciuc, Maria Camelia Foarfă, Stelian ŞtefăniŢă Mogoantă, Costin Teodor Streba, Simona Bondari, Ştefan Paitici, Cecil Sorin Mirea, Ionică Daniel Vîlcea
The pathogenesis of gastric cancer regardless of histological structure is a classic example of gene-environment interaction, and an important epidemiological aspect was the recognized association with Helicobacter pylori infection. This paper describes a case of gastric mucosa-associated lymphoid tissue (MALT) lymphoma in a young patient whose first sign of the disease was upper gastrointestinal bleeding and associated hemorrhagic shock. The patient is a 31-year-old man, diagnosed by endoscopy 10 years ago with H...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28729760/structural-insight-into-the-binding-of-c60-derivatives-with-enoyl-pyruvate-transferase-from-helicobacter-pylori
#15
Mohammad Teimouri, Muhammad Junaid, Abbas Khan, Houjin Zhang
Helicobacter pylori (H. pylori) is a human pathogen associated with acute gastritis and peptic ulcer. The MurA enzyme is an important drug target for the identification of ligands with improved efficacy and acceptable pharmaco-kinetic properties. We developed a homology model of H. Pylori MurA followed by refinement and molecular dynamics (MD) simulations. A total of 16 C60-derivatives were docked and its docking score were compared. Some of the known inhibitors were also similarly characterized and compared...
2017: Bioinformation
https://www.readbyqxmd.com/read/28728310/the-effect-of-h2-receptor-antagonist-in-acid-inhibition-and-its-clinical-efficacy
#16
REVIEW
Young Kwang Shim, Nayoung Kim
The first histamine H2 receptor antagonists (H2RAs) were developed in the early 1970s. They played a dominant role in treating peptic ulcer disease and gastroesophageal reflux disease (GERD). H2RAs block the production of acid by H(+), K(+)-ATPase at the parietal cells and produce gastric luminal anacidity for varying periods. H2RAs are highly selective, and they do not affect H1 receptors. Moreover, they are not anticholinergic agents. Sequential development of H2RAs, proton pump inhibitors (PPIs), and discovery of Helicobacter pylori infection changed the paradigm of peptic ulcer disease with marked decrease of morbidity and mortality...
July 25, 2017: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
https://www.readbyqxmd.com/read/28727656/potential-association-of-il1b-polymorphism-with-iron-deficiency-risk-in-childhood-helicobacter-pylori-infection
#17
Szu-Ta Chen, Yen-Hsuan Ni, Shing-Hwa Liu
OBJECTIVE: Helicobacter pylori (H. pylori) infection occurs predominantly in childhood. Host immune response gene polymorphism is reported to affect the susceptibility to H. pylori infection and the outcome of H. pylori-related gastric cancer. However, not all H. pylori-infected patients exhibit iron deficiency. The relationship between host genetic polymorphisms and iron deficiency mediated by H. pylori infection is not well understood. METHODS: Subjects (n = 644) from the general population aged 10 to 18 years were divided into two groups based on serology testing for anti-H...
July 19, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28725964/toward-early-detection-of-helicobacter-pylori-associated-gastric-cancer
#18
Rachel Walker, Jan Poleszczuk, Jaime Mejia, Jae K Lee, Jose M Pimiento, Mokenge Malafa, Anna R Giuliano, Heiko Enderling, Domenico Coppola
BACKGROUND: Gastric cancer is typically diagnosed at a late stage, leading to poor prognoses. Helicobacter pylori is responsible for 70% of gastric cancers globally, and patients with this bacterial infection often present with early stages of the carcinogenic pathway such as inflammation or gastritis. Although many patients continue to progress to advanced-stage disease after antibacterial treatment, there are no follow-up screening protocols for patients with a history of H. pylori...
July 19, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28725170/helicobacter-pylori-infection-status-had-no-influence-on-upper-gastrointestinal-symptoms-a-cross-sectional-analysis-of-3-005-japanese-subjects-without-upper-gastrointestinal-lesions-undergoing-medical-health-checkups
#19
Tomomi Yoshioka, Eri Takeshita, Yasuhisa Sakata, Megumi Hara, Kayo Akutagawa, Natsuko Sakata, Hiroyoshi Endo, Takashi Ohyama, Keiji Matsunaga, Yuichiro Tanaka, Shinpei Shirai, Yoichiro Ito, Nanae Tsuruoka, Ryuichi Iwakiri, Motoyasu Kusano, Kazuma Fujimoto
BACKGROUND: This study aimed to evaluate the influence of Helicobacter pylori infection and its eradication on the upper gastrointestinal symptoms of relatively healthy Japanese subjects. METHODS: A total of 3,005 subjects (male/female: 1,549/1,456) undergoing medical health checkups were enrolled in the present study, at five hospitals in Saga, Japan, from January to December 2013. They had no significant findings following upper gastrointestinal endoscopy. All subjects completed a questionnaire that addressed a frequency scale for symptoms of gastroesophageal reflux disease...
2017: Esophagus: Official Journal of the Japan Esophageal Society
https://www.readbyqxmd.com/read/28724047/correlation-between-virulence-markers-of-helicobacter-pylori-in-the-oral-cavity-and-gastric-biopsies
#20
Myriam Lucrecia Medina, Marcelo Gabriel Medina, Luis Antonio Merino
BACKGROUND: The clinical outcome of Helicobacter pylori infection has been associated with virulence factors. The presence of these factors is useful as molecular markers in the identification of the high risk for developing severe gastric pathologies. OBJECTIVE: To correlate the presence of virulence markers cagA and bab2A of H. pylori in oral and gastric biopsy samples. METHODS: An observational, prospective, descriptive, and cross-sectional study was carried out between September 2011 and September 2012...
July 13, 2017: Arquivos de Gastroenterologia
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