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Helicobacter pylori and gastric cancer

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https://www.readbyqxmd.com/read/28731617/in-vivo-diagnosis-of-early-stage-gastric-cancer-found-after-helicobacter-pylori-eradication-using-probe-based-confocal-laser-endomicroscopy
#1
Noriyuki Horiguchi, Tomomitsu Tahara, T Hyuga Yamada, Dai Yoshida, Masaaki Okubo, Mitsuo Nagasaka, Yoshihito Nakagawa, Tomoyuki Shibata, Tetsuya Tsukamoto, Makoto Kuroda, Naoki Ohmiya
BACKGROUND AND AIM: Early-stage gastric cancer (EGC) found after Helicobacter pylori (Hp) eradication often displays non-tumorous regenerative epithelium and/or maturated tumorous epithelium overlying the cancerous tissue, which may confuse endoscopic and histologic diagnosis. Probe-based confocal laser endomicroscopy (pCLE) enables in vivo real-time optical biopsy. We compared the diagnostic yields for these EGC cases using conventional white light endoscopy (WL), magnifying endoscopy with narrow-band imaging (ME-NBI), pCLE, and endoscopic biopsy; we also compared the accuracy of the horizontal extent diagnosis between ME-NBI and pCLE...
July 21, 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28730504/changing-trends-in-stomach-cancer-throughout-the-world
#2
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
#3
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/28730144/molecular-characterization-of-the-human-stomach-microbiota-in-gastric-cancer-patients
#4
Guoqin Yu, Javier Torres, Nan Hu, Rafael Medrano-Guzman, Roberto Herrera-Goepfert, Michael S Humphrys, Lemin Wang, Chaoyu Wang, Ti Ding, Jacques Ravel, Philip R Taylor, Christian C Abnet, Alisa M Goldstein
Helicobacter pylori (Hp) is the primary cause of gastric cancer but we know little of its relative abundance and other microbes in the stomach, especially at the time of gastric cancer diagnosis. Here we characterized the taxonomic and derived functional profiles of gastric microbiota in two different sets of gastric cancer patients, and compared them with microbial profiles in other body sites. Paired non-malignant and tumor tissues were sampled from 160 gastric cancer patients with 80 from China and 80 from Mexico...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28728313/the-effect-of-helicobacter-pylori-eradication-on-the-metachronous-neoplasm-after-endoscopic-resection-for-gastric-dysplasia
#5
Ji Hyun Song, Sun Young Yang, Joo Hyun Lim, Ji Min Choi, Sang Gyun Kim
Background/Aims: Helicobacter pylori (Hp) infection is an important risk factor for gastric carcinogenesis. Although several studies have investigated the effect of Hp eradication on the development of metachronous neoplasm after endoscopic resection of the gastric dysplasia, the evidence is still insufficient to make a clear conclusion. The aims of this study was to evaluate the risk factors for the development of metachronous neoplasm after endoscopic resection of gastric dysplasia and to investigate the effect of Hp eradication...
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
#6
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
#7
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/28715499/helicobacter-pylori-modulates-host-cell-responses-by-cagt4ss-dependent-translocation-of-an-intermediate-metabolite-of-lps-inner-core-heptose-biosynthesis
#8
Saskia C Stein, Eugenia Faber, Simon H Bats, Tatiana Murillo, Yvonne Speidel, Nina Coombs, Christine Josenhans
Highly virulent Helicobacter pylori cause proinflammatory signaling inducing the transcriptional activation and secretion of cytokines such as IL-8 in epithelial cells. Responsible in part for this signaling is the cag pathogenicity island (cagPAI) that codetermines the risk for pathological sequelae of an H. pylori infection such as gastric cancer. The Cag type IV secretion system (CagT4SS), encoded on the cagPAI, can translocate various molecules into cells, the effector protein CagA, peptidoglycan metabolites and DNA...
July 17, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28713064/novel-risk-stratification-for-metachronous-recurrence-after-curative-endoscopic-submucosal-dissection-for-early-gastric-cancer
#9
Hyo-Joon Yang, Sang Gyun Kim, Joo Hyun Lim, Ji Min Choi, Sooyeon Oh, Jae Yong Park, Seung Jun Han, Jung Kim, Hyunsoo Chung, Hyun Chae Jung
BACKGROUND AND AIMS: This study stratified the risk of developing metachronous gastric cancer (MGC) after curative endoscopic submucosal dissection (ESD) of early gastric cancer (EGC) to enable the customization of endoscopic surveillance for MGC. METHODS: A total of 1115 patients who underwent curative ESD based on the expanded criteria for differentiated EGC from 2005 to 2014 at a single tertiary hospital were enrolled in this retrospective cohort study. They were followed up with annual endoscopy for a median of 50...
July 13, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28707297/functional-gastrointestinal-disorders-in-children-from-low-socio-economic-status-and-helicobacter-pylori-infection
#10
F Jaime, A Villagrán, C Hernández, M Ortiz, C Serrano, P R Harris
BACKGROUND: Most studies on functional gastrointestinal disorders (FGIDs) in children are based on data from the northern hemisphere. Scientific reports are arising in South American population, but little is still known about children from low socio-economic status (SES), where Helicobacter pylori infection is endemic. Our objective was to evaluate the prevalence of FGIDs in school children from low SES and its relationship with H. pylori infection. METHODS: Children from 3 public schools of low SES from Santiago de Chile were included...
July 14, 2017: Child: Care, Health and Development
https://www.readbyqxmd.com/read/28706140/positive-helicobacter-pylori-status-is-associated-with-better-overall-survival-for-gastric-cancer-patients-evidence-from-case-cohort-studies
#11
Xuqian Fang, Kun Liu, Jialin Cai, Fangxiu Luo, Fei Yuan, Peizhan Chen
Helicobacter pylori (H. pylori) infection increases the gastric cancer risk; however, the influences of H. pylori infection status on the outcomes for gastric cancer patients have not yet clearly defined. Herein, we systematically assessed the epidemiological studies regarding the associations between the H.pylori infection status at diagnosis and the prognosis for gastric cancer patients with the meta-analysis methods. Thirty-three eligibility studies with 8,199 participants that had determined the H.pylori infection status and the outcomes for gastric cancer patients were identified through searching the PubMed and MEDLINE databases updated to March 1st, 2017...
June 28, 2017: Oncotarget
https://www.readbyqxmd.com/read/28702753/magnifying-nbi-patterns-of-gastric-mucosa-after-helicobacter-pylori-eradication-and-its-potential-link-to-the-gastric-cancer-risk
#12
Tomomitsu Tahara, Sayumi Tahara, Tetsuya Tuskamoto, Noriyuki Horiguchi, Dai Yoshida, Tomohiko Kawamura, Masaaki Okubo, Mitsuo Nagasaka, Yoshihito Nakagawa, Makoto Urano, Makoto Kuroda, Tomoyuki Shibata, Naoki Ohmiya
BACKGROUND: Gastric cancer develops after successful H. pylori eradication in patients with severe atrophic gastritis. We classified atrophic and non-atrophic mucosa of gastric body using magnifying NBI endoscopy in patients after successful H. pylori eradication. MATERIALS AND METHODS: One hundred and twenty-five patients after successful H. pylori eradication (median period after eradication: 36 months) were enrolled. Magnifying NBI patterns in the uninvolved gastric body were divided into the following: restored-small, round pits, accompanied with honeycomb-like subepithelial capillary networks; atrophic-well-demarcated oval or tubulovillous pits with clearly visible coiled or wavy vessels...
July 12, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28700998/a-decrease-of-histone-deacetylase-6-expression-caused-by-helicobacter-pylori-infection-is-associated-with-oncogenic-transformation-in-gastric-cancer
#13
Qing He, Guoqiang Li, Xin Wang, Shubin Wang, Jiang Hu, Lang Yang, Yuqi He, Yuanming Pan, Dedong Yu, Yun Wu
BACKGROUND: Histone deacetylase 6 (HDAC6) plays a role in the progression of many tumors. However, the relationship between the level of HDAC6 expression and gastric tumorigenesis is still unclear. Here, we illustrate the potential correlation between Helicobacter pylori (HP) infection and the variation of HDAC6 expression in different gastric lesions, as well as the clinical significance of HDAC6 expression in gastric cancer (GC) patients. MATERIALS AND METHODS: Between 2011 and 2016, 364 patients with different types of gastric lesions were enrolled in Baotou City Central Hospital...
July 13, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28698866/analysis-of-gastric-body-microbiota-by-pyrosequencing-possible-role-of-bacteria-other-than-helicobacter-pylori-in-the-gastric-carcinogenesis
#14
Sung-Hwa Sohn, Nayoung Kim, Hyun Jin Jo, Jaeyeon Kim, Ji Hyun Park, Ryoung Hee Nam, Yeong-Jae Seok, Yeon-Ran Kim, Dong Ho Lee
BACKGROUND: Gastric microbiota along with Helicobacter pylori (HP) plays a key role in gastric disease. The aim of our study is to investigate the difference of human gastric microbiota between antrum and body according to disease (control vs. gastric cancer) and HP status. METHODS: Each antrum and body biopsy was collected from 12 subjects at Seoul National University Bundang Hospital. Gastric microbiota was analyzed by bar-coded 454 pyrosequencing of the 16S rRNA gene...
June 2017: Journal of Cancer Prevention
https://www.readbyqxmd.com/read/28694295/in-vivo-analysis-of-the-viable-microbiota-and-helicobacter-pylori-transcriptome-in-gastric-infection-and-early-stages-of-carcinogenesis
#15
Kaisa Thorell, Johan Bengtsson-Palme, Oscar Hsin-Fu Liu, Reyna Victoria Palacios Gonzales, Intawat Nookaew, Linda Rabeneck, Lawrence Paszat, David Y Graham, Jens Nielsen, Samuel B Lundin, Åsa Sjöling
Emerging evidence shows that the human microbiota plays a larger role in disease progression and health than previously anticipated. Helicobacter pylori, the causative agent of gastric cancer and duodenal and gastric ulcers, was early associated with gastric disease, but it has also been proposed that the accompanying microbiota in Helicobacter pylori-infected individuals might affect disease progression and gastric cancer development. In this study, the composition of the transcriptionally active microbial community and the H...
July 10, 2017: Infection and Immunity
https://www.readbyqxmd.com/read/28693066/-fifth-chinese-national-consensus-report-on-the-management-of-helicobacter-pylori-infection
#16
G Liu, J Xie, Z R Lu, L Y Cheng, Y Zeng, J B Zhou, Y J Chen, N H Wang, Yiqi Du, Nonghua Lyu
The fifth national consensus conference on the management of Helicobacter pylori (H.pylori) infection organized by Chinese Medical Association, Chinese Society of Gastroenterology, H. pylori and Peptic Ulcer Study Group was held at Hangzhou, Zhejiang Province on December 15-16, 2016.More than 80 members of the study group and experts in the field of H. pylori research and gastroenterology attended the meeting.Consensus preparatory group was established to draft the related statements.The quality of evidence and strength of recommendation were evaluated by GRADE system...
July 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/28691004/population-knowledge-attitude-and-practice-regarding-helicobacter-pylori-transmission-and-outcomes-a-literature-review
#17
REVIEW
Lisa J Driscoll, Heidi E Brown, Robin B Harris, Eyal Oren
BACKGROUND: Helicobacter pylori infection is associated with the development of chronic gastritis, peptic ulcer disease, and gastric cancer. Current clinical recommendations are that H. pylori test-and-treat should be individualized based on comorbidities and patient preferences among populations at increased risk for certain morbidities. However, knowledge, attitudes and practices regarding H. pylori among potential patient populations are largely unknown. MATERIALS: We conducted a literature review to assess knowledge, attitudes, and practices of patients or community populations around H...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28690637/association-between-gastric-cancer-risk-and-serum-helicobacter-pylori-antibody-titers
#18
Mitsutaka Shuto, Toshio Fujioka, Osamu Matsunari, Kazuhisa Okamoto, Kazuhiro Mizukami, Tadayoshi Okimoto, Masaaki Kodama, Shigeru Takigami, Chuichi Seguchi, Yoshihito Nonaka, Ryugo Sato, Yoshio Yamaoka, Kazunari Murakami
BACKGROUND/AIMS: It is difficult to confirm the accurate cutoff value to diagnose Helicobacter pylori (Hp) infection using commercial serology kits. It is reported that there were many cases with present/past infection that even the serum Hp-IgG antibody (HpAb) titers were below the cutoff value (e.g., 10 U/mL for E-Plate®), suggesting that we might overlook many gastric cancer (GC). We investigated an association between gastric cancer risk and serum Helicobacter pylori antibody titers...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28690082/regulation-and-functions-of-inflammasome-mediated-cytokines-in-helicobacter-pylori-infection
#19
REVIEW
Le Son Tran, Michelle Chonwerawong, Richard L Ferrero
Persistent stomach infection with Helicobacter pylori causes chronic mucosal inflammation (gastritis), which is widely recognized as an essential precursor to gastric cancer. The IL-1 interleukin family cytokines IL-1β and IL-18 have emerged as central mediators of mucosal inflammation. Here, we review the regulation and function of these cytokines in H. pylori-induced inflammation and carcinogenesis.
July 6, 2017: Microbes and Infection
https://www.readbyqxmd.com/read/28685143/insights-from-the-redefinition-of-helicobacter-pylori-lipopolysaccharide-o-antigen-and-core-oligosaccharide-domains
#20
COMMENT
Hong Li, Tiandi Yang, Tingting Liao, Aleksandra W Debowski, Hans-Olof Nilsson, Stuart M Haslam, Anne Dell, Keith A Stubbs, Barry J Marshall, Mohammed Benghezal
H. pylori is a Gram-negative extracellular bacterium, first discovered by the Australian physicians Barry Marshall and Robin Warren in 1982, that colonises the human stomach mucosa. It is the leading cause of peptic ulcer and commonly infects humans worldwide with prevalence as high as 90% in some countries. H. pylori infection usually results in asymptomatic chronic gastritis, however 10-15% of cases develop duodenal or gastric ulcers and 1-3% develop stomach cancer. Infection is generally acquired during childhood and persists for life in the absence of antibiotic treatment...
April 25, 2017: Microbial Cell
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