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Helicobacter pylori and gastric cancer

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https://www.readbyqxmd.com/read/28631728/acg-and-cag-clinical-guideline-management-of-dyspepsia
#1
Paul M Moayyedi, Brian E Lacy, Christopher N Andrews, Robert A Enns, Colin W Howden, Nimish Vakil
We have updated both the American College of Gastroenterology (ACG) and the Canadian Association of Gastroenterology (CAG) guidelines on dyspepsia in a joint ACG/CAG dyspepsia guideline. We suggest that patients ≥60 years of age presenting with dyspepsia are investigated with upper gastrointestinal endoscopy to exclude organic pathology. This is a conditional recommendation and patients at higher risk of malignancy (such as spending their childhood in a high risk gastric cancer country or having a positive family history) could be offered an endoscopy at a younger age...
June 20, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28631563/prognostic-significance-of-glutathione-peroxidase-2-in-gastric-carcinoma
#2
Dongzhe Liu, Liang Sun, Jinxue Tong, Xiuhui Chen, Hui Li, Qifan Zhang
Increasing evidence suggests that the glutathione peroxidase 2 may actually play important roles in tumorigenesis and progression in various human cancers such as colorectal carcinomas and lung adenocarcinomas. However, the role of glutathione peroxidase 2 in gastric carcinoma remains to be determined. In this study, the expression and prognostic significance of glutathione peroxidase 2 in gastric carcinoma were investigated and the well-known prognostic factor Ki-67 labeling index was also assessed as positive control...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28631561/proinflammatory-follicular-helper-t-cells-promote-immunoglobulin-g-secretion-suppress-regulatory-b-cell-development-and-correlate-with-worse-clinical-outcomes-in-gastric-cancer
#3
Hong Zhang, Rongxi Yue, Pengfei Zhao, Xuetao Yu, Junguo Li, Guoqing Ma, Jiahong Tang, Lixin Zhang, Liying Feng, Lidong Sun, Zongchang Song, Chunliang Guo, Ning Wang
Gastric cancer is one of the most common and aggressive malignancies. Both bacterial virulence factors and host chronic inflammation are thought to promote gastric cancer development. In this study, we investigated the potential involvement of follicular helper T cells in gastric cancer. Functions of follicular helper T subsets were examined in Helicobacter pylori-infected gastric cancer patients and H. pylori-infected but asymptomatic individuals. We found that the follicular helper T cells in gastric cancer individuals were skewed toward the Th1 and Th17 subsets compared to those in H...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28627614/caga-promotes-proliferation-and-inhibits-apoptosis-of-ges-1-cells-by-upregulating-traf1-4-1bb
#4
Fen Wang, Nanfang Qu, Jin Peng, Chun Yue, Lingzhi Yuan, Yi Yuan
Cytotoxin-associated gene A (CagA) is one of the most important virulence factors of Helicobacter pylori, and serves a role in H. pylori‑mediated tumorigenesis in gastric cancer. However, the underlying molecular mechanism remains to be elucidated. The present study aimed to investigate the effects of CagA on the proliferation and apoptosis of GES‑1 cells, and the underlying mechanism. A CagA eukaryotic expression plasmid was constructed and transfected into GES‑1 cells. The mRNA and protein levels of CagA, tumor necrosis factor receptor‑associated factor 1 (TRAF1) and tumor necrosis factor receptor superfamily member 9 (4‑1BB) were determined using the reverse transcription‑quantitative polymerase chain reaction and western blot analysis, respectively...
June 12, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28616610/current-approaches-to-gastric-cancer-in-peru-and-mexico
#5
REVIEW
Erlan Santos
In Peru, the incidence of gastric cancer is reported to be around 15.8 per 100,000 inhabitants and it is the second most common oncological disease in men and the third one in women. Additionally, a high mortality index was reported, especially among poor people. To address this issue, in 2008, Peru initiated several insurance treatment plans of oncological diseases with promising results. In Mexico, there is a high predominance of gastric cancer in male gender compared to female gender, even reaching a 2/1 ratio, and the detection rate of early gastric cancer is low (10% to 20%) which results in a mainly palliative treatment with an overall survival rate in 5 years about 10% to 15% only...
2017: Translational Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28616085/helicobacter-pylori-infection-old-and-new
#6
REVIEW
S Diaconu, A Predescu, A Moldoveanu, C S Pop, C Fierbințeanu-Braticevici
Helicobacter pylori is a spiral-shaped bacterium that grows in the digestive tract and may be present in more than half of the world's population. The clinical features of Helicobacter pylori range from asymptomatic gastritis to gastrointestinal malignancy. Mucosa-associated lymphoid tissue (MALT) lymphoma is a low-grade B-cell marginal zone lymphoma and Helicobacter pylori has been detected in more than 75% of the patients with MALT lymphoma. Many tests for the detection of Helicobacter pylori are available, including antibody tests, urea breath tests, stool antigen tests and endoscopic biopsies...
April 2017: Journal of Medicine and Life
https://www.readbyqxmd.com/read/28612708/contribution-of-matrix-metalloproteinases-1-genotypes-to-gastric-cancer-susceptibility-in-taiwan
#7
Mei-Due Yang, Kuo-Cheng Lin, Meng-Chun Lu, Long-Bin Jeng, Chieh-Lun Hsiao, Te-Cheng Yueh, Chun-Kai Fu, Hsin-Ting Li, Shiou-Ting Yen, Chia-Wen Lin, Cin-Wun Wu, Su-Yi Pang, Da-Tian Bau, Fuu-Jen Tsai
Expression of matrix metalloproteinase-1 (MMP1), an interstitial collagenase regulating the extracellular matrix, plays a major role in carcinogenesis of gastric cancer, a leading cause of death worldwide. In literature, the single-nucleotide polymorphism (SNP) promoter -1607 1G/2G (rs1799750) at the MMP1 gene promoter has been reported to alter its own transcription level. While the importance's of the genotype of MMP1 promoter -1607 has not yet been studied in gastric cancer in Taiwan, our aim was to investigate MMP1 promoter -1607 genotypes and gastric cancer (GC) susceptibility in central Taiwan population...
June 2017: BioMedicine
https://www.readbyqxmd.com/read/28606845/effects-of-community-screening-for-helicobacter-pylori-13-year-follow-up-of-a-randomized-controlled-trial-hep-fyn
#8
Maria Bomme Høgh, Jane Møller Hansen, Mette Wildner-Christensen, Jesper Hallas, Ove B Schaffalitzky de Muckadell
BACKGROUND & AIMS: Helicobacter pylori (Hp) eradication improves the prognosis of peptic ulcer disease (PUD), dyspepsia, and possibly gastric cancer. Hp screening tests are accurate and eradication therapy is effective. Hp population screening seems attractive. The aim of this study was to evaluate the long-term effect of Hp population screening and eradication on dyspepsia prevalence and the incidence of PUD, and as secondary outcomes to assess the effect on health-care consumption and quality of life...
June 9, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28602400/novel-protein-interactions-with-an-actin-homolog-mreb-of-helicobacter-pylori-determined-by-bacterial-two-hybrid-system
#9
Reyna Cristina Zepeda Gurrola, Yajuan Fu, Isabel Cristina Rodríguez Luna, Claudia Guadalupe Benítez Cardoza, María de Jesús López López, Yolanda López Vidal, Germán Rubén Aguilar Gutíerrez, Mario A Rodríguez Pérez, Xianwu Guo
The bacterium Helicobacter pylori infects more than 50% of the world population and causes several gastroduodenal diseases, including gastric cancer. Nevertheless, we still need to explore some protein interactions that may be involved in pathogenesis. MreB, an actin homolog, showed some special characteristics in previous studies, indicating that it could have different functions. Protein functions could be realized via protein-protein interactions. In the present study, the MreB protein from H. pylori 26695 fused with two tags 10×His and GST in tandem was overexpressed and purified from Escherchia coli...
August 2017: Microbiological Research
https://www.readbyqxmd.com/read/28602053/effectiveness-of-gastric-cancer-screening-on-gastric-cancer-incidence-and-mortality-in-a-community-based-prospective-cohort
#10
Heewon Kim, Yunji Hwang, Hokyung Sung, Jieun Jang, Choonghyun Ahn, Sang Gyun Kim, Keun-Young Yoo, Sue K Park
Purpose: This study was performed to investigate the effectiveness of GC screening methods in a community-based prospective cohort of the Korean Multi-center Cancer Cohort (KMCC) with over a 10-year follow-up. Materials and Methods: A total 10,909 and 4,773 subjects from the KMCC with information on GE and UGIS were included in this study. Cox proportional hazard model adjusted for age, sex, Helicobacter pylori infection, cigarette smoking, and alcohol drinking was used to estimate the hazard ratios (HRs) and 95% confidence interval (CI)...
June 9, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28596787/clinical-usefulness-of-the-vs-classification-system-using-magnifying-endoscopy-with-blue-laser-imaging-for-early-gastric-cancer
#11
Yoshikazu Yoshifuku, Yoji Sanomura, Shiro Oka, Kazutaka Kuroki, Mio Kurihara, Takeshi Mizumoto, Yuji Urabe, Toru Hiyama, Shinji Tanaka, Kazuaki Chayama
BACKGROUND: Blue laser imaging (BLI) enables the acquisition of more information from tumors' surfaces compared with white light imaging. Few reports confirm the validity of magnifying endoscopy (ME) with BLI (ME-BLI) for early gastric cancer (EGC). We aimed to assess the detailed endoscopic findings from EGCs using ME-BLI. METHODS: We enrolled 386 consecutive patients with 417 EGCs that were diagnosed using ME-BLI and resected by endoscopic submucosal dissection...
2017: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/28588876/increased-risk-for-metachronous-gastric-adenocarcinoma-following-gastric-malt-lymphoma-a-us-population-based-study
#12
Carolina Palmela, Cristina Fonseca, Rita Faria, Rute Baeta Baptista, Sofia Ribeiro, Alexandre Oliveira Ferreira
BACKGROUND: Gastric mucosa-associated lymphoid tissue lymphoma (gMALT) and gastric adenocarcinoma (GC) are long-term complications of chronic Helicobacter pylori (HP) gastritis. Treatment of HP infection induces remission in most patients with gMALT. Endoscopic follow-up is not currently endorsed after complete remission. However, the risk of GC in these patients is unclear. OBJECTIVE: The objective of this study is to estimate GC risk in gMALT patients. METHODS: The National Cancer Institute Surveillance, Epidemiology and End Results 13 (SEER) database-Nov 2014 Sub (1992-2012) was used to identify adult patients diagnosed with gMALT between 1992 and 2012...
June 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28588701/aberrant-expression-of-aid-and-aid-activators-of-nf-%C3%AE%C2%BAb-and-pax5-is-irrelevant-to-ebv-associated-gastric-cancers-but-is-associated-with-carcinogenesis-in-certain-ebv-non-associated-gastric-cancers
#13
Takashi Mohri, Keiko Nagata, Satoshi Kuwamoto, Michiko Matsushita, Hirotsugu Sugihara, Masako Kato, Yasushi Horie, Ichiro Murakami, Kazuhiko Hayashi
Epstein-Barr virus-associated gastric carcinoma (EBVaGC) is a distinct subtype of gastric cancer characterized by clinicopathological features including lymphoepithelioma-like histology. Aberrant expression of activation-induced cytidine deaminase (AID) as a genomic modulator was demonstrated through pathogen-related nuclear factor κB (NF-κB) signaling in Helicobacter pylori-associated gastric cancer. To elucidate whether or not AID expression is relevant to carcinogenesis in EBVaGC, immunohistochemical expression of AID and AID-regulatory factors between EBVaGC and EBV-non-associated gastric carcinoma (GC) were evaluated, each using 15 cases of GC with lymphoid stroma (GCLS) and other types of GC...
June 2017: Oncology Letters
https://www.readbyqxmd.com/read/28587343/alteration-of-stomach-microbiota-compositions-in-the-progression-of-gastritis-induces-nitric-oxide-in-gastric-cell
#14
Tianyi Dong, Qiang Feng, Fengyan Liu, Lap Kam Chang, Xiangyu Zhou, Mingyong Han, Xingsong Tian, Ning Zhong, Shili Liu
Atrophic gastritis is considered to be an antecedent to intestinal metaplasia and gastric cancer. A previous study identified that Helicobacter pylori was absent at the severe atrophic gastritis stage, and alterations in the gastric microbial composition resembled those in gastric cancer. To explore the role of the bacteria absence of H. pylori in gastric carcinogenesis, in the current study, we compared the microbiota of clinically collected H. pylori-free gastric fluids from 30 patients with non-atrophic gastritis (N) and 22 patients with severe atrophic gastritis (S)...
June 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28585591/current-status-of-helicobacter-pylori-association-with-haematological-and-cardiovascular-diseases-a-mini-review
#15
Jibran Sualeh Muhammad, Syed Faisal Zaidi, Sheikh Abdul Saeed, Muhammad Ishaq
Helicobacter pylori infection is considered the most commonly prevalent gastrointestinal pathogen where it manages to survive despite the hostile environment of human stomach, leading to various gastric diseases including gastric cancer. Due to the chronic inflammatory state induced by H. pylori and its interaction with host immune system have diverted researchers to investigate its correlation with systemic diseases outside of the gastrointestinal tract. This literature review was done to explore the association of H...
June 2017: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/28577915/histo-blood-group-carbohydrates-as-facilitators-for-infection-by-helicobacter-pylori
#16
REVIEW
Cinara Cássia Brandão de Mattos, Luiz Carlos de Mattos
Helicobacter pylori infect millions of people around the world. It occupies a niche in the human gastrointestinal tract characterized by high expression of a repertoire of carbohydrates. ABO and Lewis histo-blood group systems are controlled by genes coding for functional glycosyltransferases which synthesize great diversity of related fucosylated carbohydrate in different tissues, including gastrointestinal mucosa, and exocrine secretions. The structural diversity of histo-blood group carbohydrates is highly complex and depends on epistatic interactions among gene-encoding glycosyltransferases...
May 31, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28571523/association-of-heterogenicity-of-helicobacter-pylori-cag-pathogenicity-island-with-peptic-ulcer-diseases-and-gastric-cancer
#17
J Khatoon, K N Prasad, R Prakash Rai, U C Ghoshal, N Krishnani
OBJECTIVE: To investigate the frequency and integrity of certain cag pathogenicity island genes (cagPAI) in Helicobacter pylori strains and their association with peptic ulcer disease (PUD) and gastric cancer. MATERIAL AND METHODS: We enrolled 240 adult patients [120 with functional dyspepsia (FD), 50 with PUD and 70 with gastric cancer] undergoing upper gastrointestinal endoscopy. H. pylori infection was diagnosed when either culture or any two of the three tests (rapid urease test, histopathology and specific ureA PCR) were positive...
June 2, 2017: British Journal of Biomedical Science
https://www.readbyqxmd.com/read/28571035/serological-evaluation-of-gastric-cancer-risk-based-on-pepsinogen-and-helicobacter-pylori-antibody-relationship-to-endoscopic-findings
#18
Takahiro Kotachi, Masanori Ito, Masaharu Yoshihara, Tomoyuki Boda, Mariko Kiso, Kazuhiko Masuda, Taiji Matsuo, Shinji Tanaka, Kazuaki Chayama
BACKGROUNDS AND AIMS: The serological risk-prediction system combined the pepsinogen (PG) test, and anti-Helicobacter pylori antibody is available for evaluation of gastric cancer risk. In this system, chronic atrophic gastritis (CAG) or H. pylori infection is diagnosed. Subjects with H. pylori negative and PG test negative (group A) are supposed to be those who have never been infected with H. pylori and are at extremely low risk for gastric cancer. However, a certain proportion of patients with CAG has been identified as the extremely low-risk group (group A)...
June 2, 2017: Digestion
https://www.readbyqxmd.com/read/28569272/gastric-adenocarcinoma
#19
REVIEW
Jaffer A Ajani, Jeeyun Lee, Takeshi Sano, Yelena Y Janjigian, Daiming Fan, Shumei Song
Gastric cancers, with gastric adenocarcinoma (GAC) as the most common histological type, impose a considerable global health burden. Although the screening strategies for early detection have been shown to be successful in Japan and South Korea, they are either not implemented or not feasible in most of the world, leading to late diagnosis in most patients. Helicobacter pylori infection contributes to the development of many endemic GACs, and pre-emptive eradication or early treatment of this bacterial infection might provide effective primary prevention...
June 1, 2017: Nature Reviews. Disease Primers
https://www.readbyqxmd.com/read/28561675/gastric-cancer-in-asia-unique-features-and-management
#20
Tomoyuki Irino, Hiroya Takeuchi, Masanori Terashima, Toshifumi Wakai, Yuko Kitagawa
Gastric cancer (GC) poses a burden to patients across the globe as the third leading cause of cancer deaths worldwide. Incidence of GC is particularly high in Asian countries, which is attributed to the prevalence of Helicobacter pylori (H. pylori) infection and has prompted the establishment of unique treatment strategies. D2 gastrectomy, which was established in the 1950s in Japan, has served as a gold standard for locally advanced GC for over half a century. Since the beginning of the 21st century, endoscopic resection (ER) techniques and minimally invasive laparoscopic surgery have greatly changed the treatment of patients with early GC...
2017: American Society of Clinical Oncology Educational Book
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