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Helicobacter pylori and gastric cancer

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https://www.readbyqxmd.com/read/28096693/gastric-and-colon-metastasis-from-breast-cancer-case-report-review-of-the-literature-and-possible-underlying-mechanisms
#1
J Carlos Villa Guzmán, J Espinosa, R Cervera, M Delgado, R Patón, J M Cordero García
Gastrointestinal metastases from breast cancer are not common. We present a 58-year-old female diagnosed with lobular breast cancer some years before whose relapses were gastric and colonic mucosal. Simultaneous metastases are extremely rare. To our knowledge, no cases of initial dual affectation have been reported. The patient also showed gastritis by Helicobacter pylori. Invasive lobular breast carcinoma is the most frequent special type of breast cancer and carries some specific molecular alterations such as loss of expression of E-cadherin...
2017: Breast Cancer: Targets and Therapy
https://www.readbyqxmd.com/read/28093653/the-administrative-project-of-helicobacter-pylori-infection-screening-among-junior-high-school-students-in-an-area-of-japan-with-a-high-incidence-of-gastric-cancer
#2
Chika Kusano, Takuji Gotoda, Hideki Ishikawa, Mitsuhiko Moriyama
OBJECTIVE: Helicobacter pylori infection is a common chronic infection that is closely associated with gastric cancer, known to be decreasing worldwide. We set up an administrative project of screening examination for H. pylori infection in junior high school students in Akita Prefecture to investigate the current prevalence of H. pylori infection in childhood in an area where the incidence of gastric cancer is particularly high. SUBJECTS AND METHODS: All students in their second or third year of junior high school (13 to 15 years old) in two cities in Akita Prefecture were recruited...
January 16, 2017: Gastric Cancer
https://www.readbyqxmd.com/read/28087975/screening-and-treating-helicobacter-pylori-infection-for-gastric-cancer-prevention-on-the-population-level
#3
REVIEW
Yi-Chia Lee, Jaw-Town Lin
Helicobacter pylori infection is the major cause of gastric cancer, and removal of H. pylori infection from a population could theoretically decrease the number of cases by about 89%. However, in real-life settings, few studies have reported the effect of screening and treating this pathogen in population-based programs. This is mainly because of the lack of an adequate infrastructure for delivery of systematic screening services to asymptomatic individuals, the lack of standardization to ensure that each subject receives the correct diagnostic testing and antibiotic treatment, and limited resources...
January 14, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28071659/acg-clinical-guideline-treatment-of-helicobacter-pylori-infection
#4
William D Chey, Grigorios I Leontiadis, Colin W Howden, Steven F Moss
Helicobacter pylori (H. pylori) infection is a common worldwide infection that is an important cause of peptic ulcer disease and gastric cancer. H. pylori may also have a role in uninvestigated and functional dyspepsia, ulcer risk in patients taking low-dose aspirin or starting therapy with a non-steroidal anti-inflammatory medication, unexplained iron deficiency anemia, and idiopathic thrombocytopenic purpura. While choosing a treatment regimen for H. pylori, patients should be asked about previous antibiotic exposure and this information should be incorporated into the decision-making process...
January 10, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28070097/a-well-differentiated-early-gastric-cancer-in-a-patient-confirmed-negative-for-helicobacter-pylori
#5
Narihiro Shibukawa, Shuji Wakamatsu, Shohei Ouchi, Yuhei Wakahara, Nobuyuki Tatsumi, Akira Kaneko
A woman in her 70s was an outpatient at our hospital. Esophagogastroduodenoscopy revealed a slightly elevated lesion with erosion, 10mm in diameter, located at the greater curvature of the antrum. Helicobacter pylori testing yielded negative results, and there was no atrophy of the gastric mucosa. Biopsy revealed a well-differentiated tubular adenocarcinoma. Complete en bloc resection was performed via endoscopic submucosal dissection, in accordance with the current Japanese guidelines. The gastric adenocarcinoma of the fundic gland type and coexisting with a hyperplastic or fundic gland polyp was negative according to the histological examination...
2017: Nihon Shokakibyo Gakkai Zasshi, the Japanese Journal of Gastro-enterology
https://www.readbyqxmd.com/read/28067243/association-of-polymorphisms-in-three-pri-mirnas-that-target-pepsinogen-c-with-the-risk-and-prognosis-of-gastric-cancer
#6
Ye-Feng Wu, Qian Xu, Cai-Yun He, Ying Li, Jing-Wei Liu, Na Deng, Li-Ping Sun, Yuan Yuan
We aimed to explore the associations of polymorphisms in three microRNAs (miRNAs) (let-7e rs8111742, miR-365b rs121224 and miR-4795 rs1002765) that target PGC with the risk and prognosis of gastric cancer/atrophic gastritis. Sequenom's MassArray was used to genotype the miRNA polymorphisms in 724 gastric cancer cases, 862 atrophic gastritis cases and 862 controls in a Chinese population. We found that let-7e rs8111742 and miR-4795 rs1002765 were associated with the risk of gastric cancer in the H. pylori-positive subgroup...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28066960/consensus-on-the-clinical-management-screening-to-treat-and-surveillance-of-helicobacter-pylori-infection-to-improve-gastric-cancer-control-on-a-nationwide-scale
#7
Bor-Shyang Sheu, Ming-Shiang Wu, Cheng-Tang Chiu, Jing-Chuan Lo, Deng-Chyang Wu, Jyh-Ming Liou, Chun-Ying Wu, Hsiu-Chi Cheng, Yi-Chia Lee, Ping-I Hsu, Chun-Chao Chang, Wei-Lun Chang, Jaw-Town Lin
BACKGROUND: Previous international consensus statements provided general policies for the management of Helicobacter pylori infection. However, there are geographic differences in the prevalence and antimicrobial resistance of H. pylori, and in the availability of medications and endoscopy. Thus, nationwide or regional consensus statements are needed to improve control of H. pylori infection and gastric cancer. MATERIALS AND METHODS: This consensus statement for management of H...
January 8, 2017: Helicobacter
https://www.readbyqxmd.com/read/28062361/redox-signaling-in-the-gastrointestinal-tract
#8
REVIEW
Salvador Pérez, Raquel Taléns-Visconti, Sergio Rius-Pérez, Isabela Finamor, Juan Sastre
Redox signaling regulates physiological self-renewal, proliferation, migration and differentiation in gastrointestinal epithelium by modulating Wnt/β-catenin and Notch signaling pathways mainly through NADPH oxidases (NOXs). In the intestine, intracellular and extracellular thiol redox status modulates the proliferative potential of epithelial cells. Furthermore, commensal bacteria contribute to intestine epithelial homeostasis through NOX1- and dual oxidase 2-derived reactive oxygen species (ROS). The loss of redox homeostasis is involved in the pathogenesis and development of a wide diversity of gastrointestinal disorders, such as Barrett's esophagus, esophageal adenocarcinoma, peptic ulcer, gastric cancer, ischemic intestinal injury, celiac disease, inflammatory bowel disease and colorectal cancer...
January 3, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28057446/long-term-follow-up-of-pepsinogen-i-ii-ratio-after-eradication-of-helicobacter-pylori-in-patients-who-underwent-endoscopic-mucosal-resection-for-gastric-cancer
#9
Su Youn Nam, Seong Woo Jeon, Hyun Seok Lee, Yong Hwan Kwon, Haeyoon Park, Jin Woo Choi
BACKGROUND: Although the pepsinogen I/II (PGI/II) ratio after Helicobacter pylori eradication is recovered at short-term follow-up, long-term follow-up studies of PGI/II are rare. METHODS: A total of 773 patients with gastric cancer who underwent endoscopic resection and pepsinogen and H. pylori tests were enrolled. H. pylori was eradicated in these patients. Endoscopic and pepsinogen tests were performed every year. A low PGI/II ratio was defined as ≤3. RESULTS: The PGI/II ratio was higher in non-infected patients (n=275, 4...
December 21, 2016: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28057411/helicobacter-pylori-a-paradigm-pathogen-for-subverting-host-cell-signal-transmission
#10
REVIEW
Michael Naumann, Olga Sokolova, Nicole Tegtmeyer, Steffen Backert
Helicobacter pylori colonizes the gastric mucosa in the human stomach and represents a major risk factor for peptic ulcer disease and gastric cancer. Here, we summarize our current knowledge of the complex impact of H. pylori on manipulating host signalling networks, that is, by the cag pathogenicity island (cagPAI)-encoded type IV secretion system (T4SS). We show that H. pylori infections reflect a paradigm for interspecies contact-dependent molecular communication, which includes the disruption of cell-cell junctions and cytoskeletal rearrangements, as well as proinflammatory, cell cycle-related, proliferative, antiapoptotic, and DNA damage responses...
January 2, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28056089/helicobacter-pylori-promote-b7-h1-expression-by-suppressing-mir-152-and-mir-200b-in-gastric-cancer-cells
#11
Gengchen Xie, Wei Li, Ruidong Li, Ke Wu, Ende Zhao, Yu Zhang, Peng Zhang, Liang Shi, Di Wang, Yuping Yin, Rui Deng, Kaixiong Tao
The most common cause of gastric cancer is infection with helicobacter pylori (HP), but the associated molecular mechanism is not well understood. In the present study, we found a marked increase in the expression of B7-H1, a member of the B7 co-stimulatory family of molecules that bind to programmed death-1 (PD-1) and play a critical immunoregulatory role in the cell-mediated immune response, in HP-positive gastric cancer tissue. Infection of cultured gastric cancer cells with HP promoted B7-H1 expression and inhibited miR-152 and miR-200b expression...
2017: PloS One
https://www.readbyqxmd.com/read/28054971/the-development-of-urease-inhibitors-what-opportunities-exist-for-better-treatment-of-helicobacter-pylori-infection-in-children
#12
Sherif T S Hassan, Miroslava Šudomová
Stomach infection with Helicobacter pylori (H. pylori) causes severe gastroduodenal diseases in a large number of patients worldwide. The H. pylori infection breaks up in early childhood, persists lifelong if not treated, and is associated with chronic gastritis and an increased risk of peptic ulcers and gastric cancer. In recent years, the problem of drug-resistant strains has become a global concern that makes the treatment more complicated and the infection persistent at higher levels when the antibiotic treatment is stopped...
January 4, 2017: Children
https://www.readbyqxmd.com/read/28054779/n6-adenosine-dna-methyltransferase-from-h-pylori-98-10-strain-in-complex-with-dna-and-adomet-structural-insights-from-in-silico-studies
#13
Swati Singh, Lalitha Guruprasad
Helicobacter pylori is a primitive Gram-negative bacterium that resides in the acidic environment of the human gastrointestinal tract, and some strains of this bacterium cause gastric ulcers and cancer. DNA methyltransferases (MTases) are promising drug targets for the treatment of cancer and other diseases that are also caused by epigenetic alternations of the genome. The N6-adenine-specific DNA MTase from H. pylori (M. Hpy N6mA) catalyzes the transfer of a methyl group from the cofactor S-adenosyl-l-methionine (AdoMet) to the flipped adenine of the substrate DNA...
January 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28053340/population-screening-and-treatment-of-helicobacter-pylori-infection
#14
REVIEW
Anthony O'Connor, Colm A O'Morain, Alexander C Ford
Helicobacter pylori is an important human pathogen, associated with a substantial burden from both malignant and non-malignant diseases. The bacterium is classed as a human carcinogen, being strongly linked with gastric cancer, the third most common cause of cancer death worldwide and is also associated with common conditions such as dyspepsia and peptic ulcer. Eradication of H. pylori reduces the incidence of gastric cancer and peptic ulcer, as well as the prevalence and costs of managing dyspepsia. Economic analyses suggest that eradication of H...
January 5, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28036260/effects-of-alcohol-consumption-aldh2-rs671-polymorphism-and-helicobacter-pylori-infection-on-the-gastric-cancer-risk-in-a-korean-population
#15
Sarah Yang, Jeonghee Lee, Il Ju Choi, Young Woo Kim, Keun Won Ryu, Joohon Sung, Jeongseon Kim
The effect of alcohol consumption on the risk of gastric cancer (GC) has not yet been fully elucidated, and an aldehyde dehydrogenase 2 (ALDH2) polymorphism, rs671, is a genetic variant that influences alcohol consumption in East Asians. Additionally, the discrepancy between the Helicobacter pylori (H. pylori) infection prevalence and GC incidence across Asian countries has not been explained. This study evaluated the effects of alcohol consumption and genetic susceptibility to defective acetaldehyde metabolism on the GC risk and their interactions with H...
December 27, 2016: Oncotarget
https://www.readbyqxmd.com/read/28030825/fas-associated-factor-1-inhibits-tumor-growth-by-suppressing-helicobacter-pylori-induced-activation-of-nf-%C3%AE%C2%BAb-signaling-in-human-gastric-carcinoma
#16
Ai-Qun Liu, Zhong-Qiu Xie, Xiao-Ni Chen, Jie Feng, Jia-Wei Chen, Fu-Jun Qin, Lian-Ying Ge
Loss of Fas-associated factor 1 (FAF1) may act as a pro-survival signal in diseased cells, but whether this is true in gastric carcinoma remains unclear. Here we report that FAF1 was expressed at low levels in gastric carcinoma tissues and cell lines, and its expression correlated with larger tumors, higher histology grade, higher TNM stage, tumor infiltration, and lymph node metastasis. Univariate analysis and survival curve analysis identified low FAF1 expression as a predictor of poor prognosis. FAF1 overexpression in HGC-27 gastric cancer cells induced cell apoptosis and inhibited cell proliferation and growth...
December 20, 2016: Oncotarget
https://www.readbyqxmd.com/read/28028359/role-of-dupa-in-virulence-of-helicobacter-pylori
#17
REVIEW
Amin Talebi Bezmin Abadi, Guillermo Perez-Perez
Helicobacter pylori (H. pylori) is a gastric human pathogen associated with acute and chronic gastritis, 70% of all gastric ulcers, 85% of all duodenal ulcers, and both forms of stomach cancer, mucosal-associated lymphoid tissue (MALT) lymphoma and adenocarcinoma. Recently, attention has focused on possible relationship between presence of certain virulence factor and H. pylori-associated diseases. Some contradictory data between this bacterium and related disorders has been observed since not all the colonized individuals develop to severe disease...
December 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28025702/characteristics-of-gastric-cancer-in-negative-test-of-serum-anti-helicobacter-pylori-antibody-and-pepsinogen-test-a-multicenter-study
#18
Mariko Kiso, Masaharu Yoshihara, Masanori Ito, Kazuhiko Inoue, Katsuaki Kato, Shigemi Nakajima, Katsuhiro Mabe, Masao Kobayashi, Naomi Uemura, Tomoyuki Yada, Masashi Oka, Takashi Kawai, Tomoyuki Boda, Takahiro Kotachi, Kazuhiko Masuda, Shinji Tanaka, Kazuaki Chayama
BACKGROUND AND AIM: The serological risk prediction system combines the pepsinogen test and anti-Helicobacter pylori (H. pylori) antibody determination. In this system, chronic atrophic gastritis (CAG) is diagnosed using the pepsinogen test. Patients who are H. pylori negative and pepsinogen negative are classified into group A, are assumed to be H. pylori uninfected, and are at an extremely low risk for gastric cancer. However, gastric cancers are detected in this group. The aim of this study is to clarify the clinicopathological status of group A patients with gastric cancer...
December 26, 2016: Gastric Cancer
https://www.readbyqxmd.com/read/28012316/the-effect-of-trimethylamine-n-oxide-on-helicobacter-pylori-induced-changes-of-immunoinflammatory-genes-expression-in-gastric-epithelial-cells
#19
Daoyan Wu, Mei Cao, Jingshan Peng, Ningzhe Li, Sijun Yi, Liju Song, Xuege Wang, Mao Zhang, Jian Zhao
Colonization of Helicobacter pylori (H. pylori) induces immune and inflammatory response in gastric mucosa. Trimethylamine N-oxide (TMAO), from diet and metabolite through the action of gut microbiota, has been linked to inflammatory diseases. To investigate the effects of TMAO and H. pylori infection on gene expression in gastric epithelial cells, Human gene chip Affymetrix HTA 2.0 was used in this study. 1312 genes were identified as differentially expressed genes in GES-1 cells with H. pylori and TMAO co-treatment compared to the control...
February 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28012218/met4-expression-predicts-poor-prognosis-of-gastric-cancers-with-helicobacter-pylori-infection
#20
Naoko Sakamoto, Hironori Tsujimoto, Risa Takahata, Cao Brian, Zhao Ping, Nozomi Ito, Hideyuki Shimazaki, Takashi Ichikura, Kazuo Hase, George F Vande Woude, Nariyoshi Shinomiya
Role of HGF/SF-MET signaling is important in cancer progression, but its relation with Helicobacter pylori-positive gastric cancers remains to be elucidated. In total, 201 patients with primary gastric carcinoma who underwent curative or debulking resection without preoperative chemotherapy were studied. MET4 and anti-HGF/SF mAbs were used for immunohistochemical analysis. Survival of gastric cancer patients was estimated by Kaplan-Meier method and compared with log-rank. Cox proportional hazards models were fit to determine the independent association of MET-staining status with outcome...
December 23, 2016: Cancer Science
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