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H Pylori Cancer

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https://www.readbyqxmd.com/read/30513960/combined-gastric-and-colorectal-cancer-screening-a-new-strategy
#1
Michael Selgrad, Jan Bornschein, Arne Kandulski, Jochen Weigt, Albert Roessner, Thomas Wex, Peter Malfertheiner
BACKGROUND: Our aim was to evaluate the feasibility of a serological assessment of gastric cancer risk in patients undergoing colonoscopy in countries with low-to-moderate incidence rates. METHODS: Serum samples were prospectively collected from 453 patients (>50 years old) undergoing colonoscopies. Of these, 279 (61.6%) also underwent gastroscopy to correlate the results for serum pepsinogen I and II (sPG-I and sPG-II), sPG-I/II ratio, and anti- H. pylori antibodies with gastric histopathology findings (graded according to the updated Sydney classification and the Operative Link of Gastritis Assessment (OLGA) and the Operative Link for Gastric Intestinal Metaplasia assessment (OLGIM) systems)...
December 3, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/30513684/helicobacter-pylori-infection-induced-hepatoma-derived-growth-factor-regulates-the-differentiation-of-human-mesenchymal-stem-cells-to-myofibroblast-like-cells
#2
Chung-Jung Liu, Yao-Kuang Wang, Fu-Chen Kuo, Wen-Hung Hsu, Fang-Jung Yu, Shuchen Hsieh, Ming-Hong Tai, Deng-Chyang Wu, Chao-Hung Kuo
Hepatoma-derived growth factor (HDGF) plays a critical role in tumor cell proliferation, anti-apoptosis, VEGF expression, lymph node metastasis and poor prognosis in human gastric cancer. Gastric cancer, as one of the most prevalent cancers worldwide, is the second leading cause of cancer-related mortality in the world for the prognosis of gastric cancer is generally poor, especially in patients with advanced stage. Helicobacter pylori ( H. pylori ) infection causes the chronic inflammation of stomach as well as the development of gastric cancer, with a three to six-fold increased risk of gastric cancer...
November 30, 2018: Cancers
https://www.readbyqxmd.com/read/30511397/interferon-%C3%AE-directly-induces-gastric-epithelial-cell-death-and-is-required-for-progression-to-metaplasia
#3
Luciana H Osaki, Kevin A Bockerstett, Chun Fung Wong, Eric L Ford, Blair B Madison, Richard J DiPaolo, Jason C Mills
Chronic inflammation of the gastric mucosa, often caused by autoimmune gastritis and/or infection with Helicobacter pylori, can lead to atrophy of acid-secreting parietal cells with metaplasia of remaining cells. The histological pattern marks a critical step in the progression from chronic gastritis to gastric cancer, yet underlying mechanism(s) of inflammation-induced cell death of gastric epithelial cells are poorly understood. We investigated direct effects of a type 1 cytokine associated with autoimmunity and infection, interferon-γ (IFN-γ), on gastric epithelial cells...
December 3, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/30509760/correlation-between-expression-of-mmp-9-and-mmp-3-in-helicobacter-pylori-infected-patients-with-different-gastroduodenal-diseases
#4
Nader Bagheri, Marzieh Sadeghiani, Ghorbanali Rahimian, Majid Mahsa, Mohammedhadi Shafigh, Mahmoud Rafieian-Kopaei, Hedayatollah Shirzad
BACKGROUND AND STUDY AIMS: Helicobacter pylori (H. pylori) has been implicated in the pathogenesis of most important gastro-duodenal diseases, such as gastritis, peptic ulcer disease (PUD) and gastric cancer. H. pylori upregulates the expression and activity of several matrix metalloproteinases (MMPs) in the gastric mucosa, but the role of MMP-3 and MMP-9 in infected patients with H. pylori have not been clearly defined yet. We examined mucosal MMP-3 and MMP-9 mRNA levels in gastric mucosa of H...
November 30, 2018: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/30501144/immunohistochemical-analysis-of-lgr5-and-troy-expression-in-gastric-carcinogenesis-demonstrates-an-inverse-trend
#5
Samaneh Saberi, Abbas Piryaei, Esmat Mirabzadeh, Maryam Esmaeili, Toktam Karimi, Sara Momtaz, Afshin Abdirad, Niloofar Sodeifi, Mohammad Ali Mohagheghi, Hossein Baharvand, Marjan Mohammadi
Background: Two of the Wnt signaling pathway target genes; tumor necrosis factor receptor family member (TROY) and leucine-rich G-protein coupled receptor (LGR5), are involved in the generation and maintenance of gastrointestinal epithelium. A negative modulatory role has recently been assigned to TROY, in this pathway. Here, we have examined their simultaneous expression in gastric carcinogenesis. Methods: Tumor and paired adjacent tissues of intestinal-type gastric cancer (GC) patients (n = 30) were evaluated for LGR5 and TROY expression by immunohistochemistry...
December 3, 2018: Iranian Biomedical Journal
https://www.readbyqxmd.com/read/30489354/helicobacter-pylori-seroprevalence-in-spain-influence-of-adult-and-childhood-sociodemographic-factors
#6
Irene Lorenzo, Nerea Fernández-de-Larrea, Angelika Michel, Beatriz Romero, Virginia Lope, Xavier Bessa, Victor Moreno, Vicente Martín, Pilar Amiano, Jesús Castilla, Adonina Tardón, Trinidad Dierssen-Sotos, Rosana Peiró, Marian Díaz-Santos, Carmen Navarro, José J Jiménez-Moleón, Julia Butt, Aurelio Barricarte, Irune Ruiz, Antonio J Molina-de-la-Torre, Delphine Casabonne, Beatriz Pérez-Gómez, Manolis Kogevinas, Rosa Del Campo, Silvia de Sanjosé, Marina Pollán, Tim Waterboer, Nuria Aragonés
Helicobacter pylori (H. pylori) chronic infection causes severe digestive diseases, including gastric cancer, and certain strains entail a higher risk. Risk factors for this infection are still not fully understood. The aim of this study was to describe the association of adult and childhood sociodemographic factors with the seroprevalence of H. pylori, and with CagA and VacA antigen-specific seropositivity among H. pylori-seropositive individuals in the Spanish adult population. Serum antibody reactivity to H...
November 26, 2018: European Journal of Cancer Prevention
https://www.readbyqxmd.com/read/30488287/mael-cancer-testis-antigen-as-a-diagnostic-marker-in-primary-stages-of-gastric-cancer-with-helicobacter-pylori-infection
#7
Mohammad Reza Abbaszadegan, Negin Taghehchian, Azadeh Aarabi, Meysam Moghbeli
PURPOSE: Gastric cancer (GC) is the third leading cause of cancer related deaths in the world. Cancer testis antigens (CTAs) are involved in tumor progression of various cancers. These markers have not any expression or minimally expression in normal tissues, highlighting them as efficient methods for molecular targeted therapy. In the present study, we assessed the role of MAEL as a CTA in biology of GC and risk of Helicobacter Pylori (H pylori) infection. METHODS: Levels of MAEL mRNA expression in 80 GC tumor tissues were compared to their corresponding normal margins using the real-time polymerase chain reaction...
November 28, 2018: Journal of Gastrointestinal Cancer
https://www.readbyqxmd.com/read/30487702/association-between-helicobacter-pylori-epstein-barr-virus-human-papillomavirus-and-gastric-adenocarcinomas
#8
Carolina Rosal Teixeira de Souza, Marcelli Carolini Alves Almeida, André Salim Khayat, Emerson Lucena da Silva, Paulo Cardoso Soares, Luiz Cláudio Chaves, Rommel Mario Rodríguez Burbano
AIM: To correlate Helicobacter pylori ( H. pylori ), Epstein-Barr virus (EBV) and human papillomavirus (HPV) with gastric cancer (GC) cases in Pará State, Brazil. METHODS: Tissue samples were obtained from 302 gastric adenocarcinomas. A rapid urease test was used to detect the presence of H. pylori , and the presence of the cagA gene in the HP-positive samples was confirmed by PCR. An RNA in situ hybridization test designed to complement Eber1 RNA was used to detect the presence of EBV in the samples, and the L1 region of HPV was detected using nested PCR...
November 21, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/30483568/nodular-gastritis-in-association-with-gastric-cancer-development-before-and-after-helicobacter-pylori-eradication
#9
Izumi Nishikawa, Jun Kato, Satoshi Terasoma, Hiroyoshi Matsutani, Hidehiko Tamaki, Tetsuya Tamaki, Fumiaki Kuwashima, Hiroya Nakata, Tatsuji Tomeki, Hideyuki Matsunaka, Yumiko Ibata, Yasunobu Yamashita, Takao Maekita, Katsuhiko Higashi, Masao Ichinose
Background and Aim: Nodular gastritis is caused by Helicobacter pylori infection and is associated with the development of diffuse-type gastric cancer. This study examined the clinical characteristics of patients with nodular gastritis, including cancer incidence before and after H. pylori eradication. Methods: This was a retrospective study of patients who underwent upper endoscopy and were positive for H. pylori infection. We examined the clinical findings and follow-up data after H...
June 2018: JGH open: an open access journal of gastroenterology and hepatology
https://www.readbyqxmd.com/read/30479570/polymorphisms-of-tgfbr1-tlr4-are-associated-with-prognosis-of-gastric-cancer-in-a-chinese-population
#10
Bangshun He, Tao Xu, Bei Pan, Yuqin Pan, Xuhong Wang, Jingwu Dong, Huiling Sun, Xueni Xu, Xiangxiang Liu, Shukui Wang
Background: Helicobacter pylori ( H. pylori )-induced gastric cancer is an intricate progression of immune response against H. pylori infection. IL-16, TGF-β1 and TLR4 pathways were the mediators involved in the immune response. We hypothesized that genetic variations in genes of these pathways have potential susceptibility to gastric cancer risk, and predict clinical outcomes of patients. Methods: To investigate the susceptibility and prognostic value of genetic variations of IL - 16 , TGFBR1 and TLR4 pathways to gastric cancer, we performed a case-control study combined a retrospective study in a Chinese population...
2018: Cancer Cell International
https://www.readbyqxmd.com/read/30478171/kinetic-and-catalytic-properties-of-m-hpyaxvii-a-phase-variable-dna-methyltransferase-from-helicobacter-pylori
#11
Yedu Prasad, Ritesh Kumar, Awanish Kumar Chaudhary, Rajkumar Dhanaraju, Soneya Majumdar, Desirazu N Rao
The bacterium Helicobacter pylori is one of the most common infectious agents found in the human stomach. H. pylori has an unusually large number of DNA methyltransferases (MTases), prompting speculation that they may be involved in the cancerization of epithelial cells. The mod-4a/4b locus, consisting of the hp1369 and hp1370 ORFs, encodes for a truncated and inactive MTase in H. pylori strain 26695. However, slipped-strand synthesis within the phase-variable poly-guanine track in hp1369 results in expression of an active HP1369-1370 fusion N6 -adenine methyltransferase, designated M...
November 26, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/30473688/afadin-downregulation-by-helicobacter-pylori-induces-epithelial-to-mesenchymal-transition-in-gastric-cells
#12
Miguel Sardinha Marques, Joana Melo, Bruno Cavadas, Nuno Mendes, Luísa Pereira, Fátima Carneiro, Ceu Figueiredo, Marina Leite
Afadin is a cytoplasmic protein of the adherens junctions, which regulates the formation and stabilization of both the adherens and the tight junctions. Aberrant expression of Afadin has been shown in cancer and its loss has been associated with epithelial-to-mesenchymal transition (EMT). EMT is characterized by the change from an epithelial to a mesenchymal phenotype, with modifications on the expression of adhesion molecules and acquisition of a migratory and invasive cell behavior. While it is known that Helicobacter pylori disrupts the tight and the adherens junctions and induces EMT, the effect of the bacteria on Afadin is still unknown...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/30468469/microbial-community-reshaped-in-gastric-cancer
#13
L-L Wang, J-X Liu, X-J Yu, J-L Si, Y-X Zhai, Q-J Dong
Patients with gastric cancer harbor distinct microbiota in the stomach. It features with lowered biodiversity, discrete structure, and varied composition. Some bacteria from gastric microbiota are potentially carcinogenic as they are enriched or depleted in gastric cancer. Distinct profile of microbial community in gastric cancer is possibly resulted from altered caused by pathophysiological and environmental factors. H. pylori is a carcinogen colonizing the human stomach. Although persisting for decades, it rarely causes compositional alteration of microbiota...
November 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/30468256/baicalin-baicalein-and-lactobacillus-rhamnosus-jb3-alleviated-helicobacter-pylori-infections-in-vitro-and-in-vivo
#14
Mu-En Chen, Chiu-Hsian Su, Jai-Sing Yang, Chi-Cheng Lu, Yu-Chi Hou, Jin-Bin Wu, Yuan-Man Hsu
Helicobacter pylori infection is associated with chronic gastritis, peptic ulcers, and gastric cancer. The flavonoid compounds baicalin and baicalein found in many medicinal plants exhibit an anti-inflammatory effect. The administration of Lactobacillus strains reducing the risk of H. pylori infection is well accepted. In this study, the therapeutic effects against H. pylori infection of baicalin, baicalein, and L. rhamnosus JB3 (LR-JB3), isolated from a dairy product, were investigated. Compared to baicalin, baicalein exhibited stronger anti-H...
November 23, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/30467699/assessment-of-gastritis-and-gastric-cancer-risk-in-the-chilean-population-using-the-olga-system
#15
Enrique Bellolio, Ismael Riquelme, Angela L Riffo-Campos, Carlos Rueda, Catterina Ferreccio, Miguel Villaseca, Priscilla Brebi, Sergio Muñoz, Juan Carlos Araya
Gastric cancer (GC) is the first cancer-related cause of death in Chile; however, no plan for GC early detection has been implemented in this country. The OLGA system characterizes gastritis from stages 0 to IV according to the risk of developing GC based on H. pylori infection, atrophy, metaplasia and GC. In this study, the performance of the OLGA system was evaluated in 485 Chilean patients receiving routine endoscopy to improve the detection of early GC or preneoplastic lesions. The results showed that OLGA scores, atrophy, metaplasia and GC increased significantly with age (p < 0...
November 22, 2018: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/30466467/helicobacter-pylori-caga-promotes-epithelial-mesenchymal-transition-in-gastric-carcinogenesis-via-triggering-oncogenic-yap-pathway
#16
Nianshuang Li, Yan Feng, Yi Hu, Cong He, Chuan Xie, Yaobin Ouyang, Stephen C Artim, Deqiang Huang, Yin Zhu, Zhijun Luo, Zhongming Ge, Nonghua Lu
BACKGROUND: Helicobacter pylori (H. pylori) delivers oncoprotein CagA into gastric epithelial cells via the T4SS and drives activation of multiple oncogenic signalling pathways. YAP, a core effector of the Hippo tumour suppressor pathway, is frequently overexpressed in human cancers, suggesting its potential tumor-promoting role. Although CagA is a casual factor in H. pylori induced gastric carcinogenesis, the link between CagA and YAP pathway has not been identified. In this work, we investigated the regulation of oncogenic YAP pathway by H...
November 22, 2018: Journal of Experimental & Clinical Cancer Research: CR
https://www.readbyqxmd.com/read/30458609/association-between-body-mass-index-and-gastric-cancer-risk-according-to-effect-modification-by-helicobacter-pylori-infection
#17
Jieun Jang, Eun-Jung Cho, Yunji Hwang, Elisabete Weiderpass, Choonghyun Ahn, Jeoungbin Choi, Soung-Hoon Chang, Hai-Rim Shin, Min Kyung Lim, Keun-Young Yoo, Sue K Park
Purpose: Few studies investigated roles of body mass index (BMI) on gastric cancer (GC) risk according to Helicobacter pylori infection status. This study was conducted to evaluate associations between BMI and GC risk with consideration of H. pylori infection information. Materials and Methods: We performed a case-cohort study (n=2,458) that consists of a subcohort, (n=2,193 including 67 GC incident cases) randomly selected from the Korean Multicenter Cancer Cohort (KMCC) and 265 incident GC cases outside of the subcohort...
November 21, 2018: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/30455751/overview-of-mdm2-and-b-raf-expression-in-gastric-lesions
#18
Tarek Aboushousha, Noha Helal, Olfat Hammam, Manar Ibrahim, Samar Khaled, Amr Mostafa, Amgad Anas
BACKGROUND: Globally, gastric cancer (GC) it is the fourth most common cancer and the third cause of cancer-related deaths. Overexpression of MDM2 and B-RAF appeared to be increased in malignancy and associated with poor prognosis in several human tumours, but their role in gastric cancer remains controversial. AIM: We had investigated the immunohistochemical expression of MDM2 and B-RAF in 136 gastric lesions with/without H. pylori association. MATERIAL AND METHODS: Studied specimens include chronic gastritis (32), intestinal type GC (70), diffuse GC (22) and gastrointestinal stromal tumours (GIST) (12)...
October 25, 2018: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/30455363/carcinogenic-helicobacter-pylori-strains-selectively-dysregulate-the-in-vivo-gastric-proteome-which-may-be-associated-with-stomach-cancer-progression
#19
Jennifer M Noto, Kristie Rose, Amanda J Hachey, Alberto G Delgado, Judith Romero-Gallo, Lydia E Wroblewski, Barbara G Schneider, Shailja C Shah, Timothy L Cover, Keith T Wilson, Dawn A Israel, Juan Carlos Roa, Kevin L Schey, Yana Zavros, M Blanca Piazuelo, Richard M Peek
Helicobacter pylori is the strongest risk factor for gastric cancer. Initial interactions between H. pylori and its host originate at the microbial-gastric epithelial cell interface, and contact between H. pylori and gastric epithelium activates signaling pathways that drive oncogenesis. One microbial constituent that increases gastric cancer risk is the cag pathogenicity island, which encodes a type IV secretion system that translocates the effector protein, CagA, into host cells. We previously demonstrated that infection of Mongolian gerbils with a carcinogenic cag+ H...
November 19, 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/30454658/helicobacter-pylori-evasion-strategies-of-the-host-innate-and-adaptive-immune-responses-to-survive-and-develop-gastrointestinal-diseases
#20
REVIEW
Ahmad Karkhah, Soheil Ebrahimpour, Maryam Rostamtabar, Veerendra Koppolu, Sorena Darvish, Veneela Krishna Rekha Vasigala, Majid Validi, Hamid Reza Nouri
Helicobacter pylori (H. pylori) is a bacterial pathogen that resides in more than half of the human population and has co-evolved with humans for more than 58,000 years. This bacterium is orally transmitted during childhood and is a key cause of chronic gastritis, peptic ulcers and two malignant cancers including MALT (mucosa-associated lymphoid tissue) lymphoma and adenocarcinoma. Despite the strong innate and adaptive immune responses, H. pylori has a long-term survival in the gastric mucosa. In addition to the virulence factors, survival of H...
January 2019: Microbiological Research
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