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Helicobacter pylori and gastric cancer

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https://www.readbyqxmd.com/read/29454568/the-phenotypic-heterogeneity-of-hereditary-diffuse-gastric-cancer-the-report-of-one-family-with-early-onset-disease
#1
Irene Gullo, Vitor Devezas, Manuela Baptista, Luzia Garrido, Sérgio Castedo, Rui Morais, Xiaogang Wen, Elisabete Rios, Jorge Pinheiro, Inȇs Pinto-Ribeiro, Rui M Ferreira, John Preto, João Santos-Antunes, Margarida Marques, Miquel Campos, Filipe Almeida, Maria do Céu Espinheira, Jorge Amil Dias, Céu Figueiredo, Carla Oliveira, Eunice Trindade, Fátima Carneiro
BACKGROUND AND AIMS: The time-course for the development of clinically significant hereditary diffuse gastric cancer (HDGC) is unpredictable. Little is known about the progression from pre-clinical, indolent lesions to widely invasive, aggressive phenotypes. Gastro-endoscopy often fails to detect early lesions and risk-reducing/prophylactic total gastrectomy (PTG) is the only curative approach. We present a HDGC family with early-onset disease, in which clinical and histological findings provided insight into the understanding of different HDGC phenotypes...
February 15, 2018: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/29453165/endoscopic-submucosal-dissection-for-the-diagnosis-and-therapy-of-pedunculated-gastric-cancer-with-prolapse-into-the-duodenal-bulb-a-case-report
#2
Norihiko Suzuki, Masashi Yoshida, Hironori Ohdaira, Tomonori Imakita, Nobuhiro Tsutsui, Yasunobu Kobayashi, Junji Takahashi, Shinya Okada, Masaki Kitajima, Yutaka Suzuki
INTRODUCTION: Preoperative diagnosis of gastric cancer invasion is not always sufficiently accurate. Diagnostic endoscopic submucosal dissection (ESD) can be performed for the purpose of accurate decision making and to avoid partial treatment vs aggressive over-treatment. We present a patient with the gastric cancer with indeterminate pre-operative diagnosis for depth of the invasion. CASE PRESENTATION: A 70-year-old man presented at our hospital because both anti-Helicobacter pylori (Hp) IGG antibody and serum pepsinogen (PG) levels were classified as positive...
February 9, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29452293/genetic-diversity-and-functional-analysis-of-oipa-gene-in-association-with-other-virulence-factors-among-helicobacter-pylori-isolates-from-iranian-patients-with-different-gastric-diseases
#3
Nastaran Farzi, Abbas Yadegar, Hamid Asadzadeh Aghdaei, Yoshio Yamaoka, Mohammad Reza Zali
Helicobacter pylori (H. pylori) is one of the most genetically diverse bacterial pathogens that persistently colonizes the human gastric epithelium. This remarkable genomic plasticity may act as a driving force for successful adaptation and persistence of the bacteria in the harsh gastric environment. Outer inflammatory protein A (OipA) encoded by oipA gene (HP0638/hopH) is a member of the outer membrane proteins (OMPs) of H. pylori involved in induction of IL-8 secretion and is associated with development of peptic ulcer and gastric cancer...
February 13, 2018: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/29446491/characterization-of-morphological-conversions-of-helicobacter-pylori-under-anaerobic-conditions
#4
Sayaka Hirukawa, Hiroshi Sagara, Satoshi Kaneto, Tomoyo Kondo, Kotaro Kiga, Takahito Sanada, Hiroshi Kiyono, Hitomi Mimuro
Helicobacter pylori (H. pylori) is a Gram-negative microaerophilic bacterial pathogen which colonizes the stomach of more than half the human population, and is linked to chronic gastritis, peptic ulcers, and gastric cancer. Spiral-shaped H. pylori undergo morphologic conversion to the viable but not culturable (VBNC) coccoid form as they transit from the microaerobic stomach into the anaerobic intestinal tract. However, little is known about the morphological and pathogenic characteristics of H. pylori under prolonged anaerobic conditions...
February 15, 2018: Microbiology and Immunology
https://www.readbyqxmd.com/read/29445300/gastric-cancer-epidemiology-prevention-classification-and-treatment
#5
REVIEW
Robert Sitarz, Małgorzata Skierucha, Jerzy Mielko, G Johan A Offerhaus, Ryszard Maciejewski, Wojciech P Polkowski
Gastric cancer is the second most common cause of cancer-related deaths in the world, the epidemiology of which has changed within last decades. A trend of steady decline in gastric cancer incidence rates is the effect of the increased standards of hygiene, conscious nutrition, and Helicobacter pylori eradication, which together constitute primary prevention. Avoidance of gastric cancer remains a priority. However, patients with higher risk should be screened for early detection and chemoprevention. Surgical resection enhanced by standardized lymphadenectomy remains the gold standard in gastric cancer therapy...
2018: Cancer Management and Research
https://www.readbyqxmd.com/read/29442458/the-influence-of-vitamin-d-deficiency-on-eradication-rates-of-helicobacter-pylori
#6
Oguzhan Yildirim, Tulay Yildirim, Yuksel Seckin, Pelin Osanmaz, Yilmaz Bilgic, Rafet Mete
BACKGROUND: Helicobacter pylori eradication therapy improves the healing of various gastro-duodenal diseases such as chronic gastritis and peptic ulcer, and also reduces gastric cancer incidence. Several studies have reported on risk factors other than antibiotic resistance related to Helicobacter pylori eradication failure. OBJECTIVES: In this study, we aimed to investigate whether or not the serum levels of 25-hydroxy-vitamin D (25(OH)D) influence eradication rates of H...
December 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/29436014/comparison-of-dysplastic-fundic-gland-polyps-in-patients-with-and-without-familial-adenomatous-polyposis
#7
Shana F Straub, Michael G Drage, Raul S Gonzalez
AIM: Dysplastic FGPs (d-FGPs) typically arise in patients with familial adenomatous polyposis (FAP) but may occur in nonsyndromic patients. They rarely develop malignancy, but their significance is unclear, especially in nonsyndromic patients. APC/β-catenin alterations have been implicated in their pathogenesis, and β-catenin immunohistochemistry (IHC) may show nuclear positivity. METHODS AND RESULTS: We identified 124 FGPs with low-grade dysplasia (LGD) or high-grade dysplasia (HGD) or indefinite for dysplasia (IFD) from 66 patients (27 with FAP, 39 nonsyndromic)...
February 12, 2018: Histopathology
https://www.readbyqxmd.com/read/29434449/impact-of-snp-snp-interactions-of-dna-repair-gene-ercc5-and-metabolic-gene-gstp1-on-gastric-cancer-atrophic-gastritis-risk-in-a-chinese-population
#8
Liang Sang, Zhi Lv, Li-Ping Sun, Qian Xu, Yuan Yuan
AIM: To investigate the interactions of the DNA repair gene excision repair cross complementing group 5 (ERCC5) and the metabolic gene glutathione S-transferase pi 1 (GSTP1) and their effects on atrophic gastritis (AG) and gastric cancer (GC) risk. METHODS: Seven ERCC5 single nucleotide polymorphisms (SNPs) (rs1047768, rs2094258, rs2228959, rs4150291, rs4150383, rs751402, and rs873601) and GSTP1 SNP rs1695 were detected using the Sequenom MassARRAY platform in 450 GC patients, 634 AG cases, and 621 healthy control subjects in a Chinese population...
February 7, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29434176/associations-between-caga-vaca-and-the-clinical-outcomes-of-helicobacter-pylori-infections-in-okinawa-japan
#9
Tomoko Inagaki, Shin Nishiumi, Yoshiyuki Ito, Akiyo Yamakawa, Yukinao Yamazaki, Masaru Yoshida, Takeshi Azuma
Helicobacter pylori, which is involved in the pathogenesis of gastroduodenal disease, produces CagA and VacA as major virulence factors. CagA is classified into East Asian and Western types based on the number and sequences of its Glu-Pro-Ile-Tyr-Ala motifs. The vacA gene has three polymorphic regions: the signal (s), intermediate (i), and middle (m) regions. The lowest gastric cancer mortality rate is seen in Okinawa. On the Japanese mainland (Honshu), most H. pylori produce s1/m1-VacA, which exhibits strong toxicity, and East Asian-type CagA...
November 22, 2017: Kobe Journal of Medical Sciences
https://www.readbyqxmd.com/read/29434119/a-case-of-helicobacter-pylori-negative-advanced-gastric-cancer-with-massive-eosinophilia
#10
Atsushi Takagi, Hideki Ozawa, Masayuki Oki, Hidetaka Yanagi, Kazuhito Nabeshima, Naoto Nakamura
The incidence of Helicobacter pylori-negative gastric cancer is very low. A 60-year-old man was referred to Tokai University Hospital from a local clinic because of eosinophilia. The laboratory data revealed prominent eosinophilia, with a white blood cell count of 7,900/μl and increased eosinophil granulocyte level of 1,659/μl. After an examination for secondary eosinophilia, esophagogastroduodenoscopy showed an enlarged gastric fold in the corpus, suggesting type 4 gastric cancer. Repeated EGD and a re-biopsy demonstrated poorly differentiated adenocarcinoma and signet ring cell carcinoma...
February 9, 2018: Internal Medicine
https://www.readbyqxmd.com/read/29432909/influence-of-helicobacter-pylori-virulence-factors-caga-and-vaca-on-pathogenesis-of-gastrointestinal-disorders
#11
REVIEW
Shima Nejati, Ahmad Karkhah, Hossein Darvish, Majid Validi, Soheil Ebarhimpour, Hamid Reza Nouri
Helicobacter Pylori (H. pylori) is a gram-negative bacteria infecting numerous people all over the world. It has been established that H. pylori play an important role in pathogenesis of gastritis, peptic ulcer and gastric cancer. Pathogenic features of this bacterium are mainly attributes to the existence of pathogenic islands (PAI) genes. The most known genes in these islands are cytotoxin-associated gene A (CagA) and vacuolating cytotoxin gene (VacA). Most studies demonstrated various frequency of CagA and VacA in patient with peptic ulcer or gastritis in different countries...
February 9, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29428426/first-line-treatment-of-helicobacter-pylori-in-lebanon-comparison-of-bismuth-containing-quadruple-therapy-versus-14-days-sequential-therapy
#12
Mahdi Tarhini, Mohammad Fayyad-Kazan, Hussein Fayyad-Kazan, Mahmoud Mokbel, Mohammad Nasreddine, Bassam Badran, Ghada Kchour
Helicobacter Pylori (H. Pylori) is the most common cause of peptic ulcer disease (PUD) and represents a strong risk factor for gastric cancer. Treatment of H. Pylori is, therefore, a persistent need to avoid serious medical complications. Resistance to antibiotics remains to be the major challenge for H. Pylori eradication. In this study, we determined the prevalence of H. pylori infection and evaluated H. pylori eradication efficacy of bismuth-containing quadruple therapy (Pylera) versus 14-days sequential therapy in treatment naïve-Lebanese patients...
February 8, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29427040/novel-epigenetic-markers-for-gastric-cancer-risk-stratification-in-individuals-after-helicobacter-pylori-eradication
#13
Masahiro Maeda, Satoshi Yamashita, Taichi Shimazu, Naoko Iida, Hideyuki Takeshima, Takeshi Nakajima, Ichiro Oda, Sohachi Nanjo, Chika Kusano, Akiko Mori, Hiroshi Moro, Harumi Yamada, Shoichiro Tsugane, Toshiro Sugiyama, Yoshiharu Sakai, Toshikazu Ushijima
BACKGROUND: The risk stratification of healthy individuals after Helicobacter pylori eradication is an urgent issue. The assessment of aberrant DNA methylation accumulated in gastric tissues with normal appearance, which can reflect overall epigenomic damage, is a promising strategy. We aimed to establish novel epigenetic cancer risk markers for H. pylori-eradicated individuals. METHODS: Gastric mucosa was collected from eight healthy volunteers without H. pylori infection (G1), 75 healthy individuals with gastric atrophy (G2), and 94 gastric cancer patients (G3) after H...
February 9, 2018: Gastric Cancer
https://www.readbyqxmd.com/read/29423095/decrease-in-psca-expression-caused-by-helicobacter-pylori-infection-may-promote-progression-to-severe-gastritis
#14
Osamu Toyoshima, Chizu Tanikawa, Ryuta Yamamoto, Hidenobu Watanabe, Hiroharu Yamashita, Kosuke Sakitani, Shuntaro Yoshida, Michiaki Kubo, Keitaro Matsuo, Hidemi Ito, Kazuhiko Koike, Yasuyuki Seto, Koichi Matsuda
SNP rs2294008 in Prostate Stem Cell Antigen (PSCA) and decreased PSCA expression are associated with gastric cancer. The objective of this study is to investigate the role of rs2294008 and PSCA expression in the gastritis-gastric cancer carcinogenic pathway. We conducted a case-control association study of H. pylori-infected gastritis and gastric cancer. rs2294008 was associated with the progression to chronic active gastritis (P = 9.4 × 10-5; odds ratio = 3.88, TT + TC vs CC genotype), but not with H. pylori infection per se nor with the progression from active gastritis to gastric cancer...
January 9, 2018: Oncotarget
https://www.readbyqxmd.com/read/29410309/gastroprotective-effects-of-hwanglyeonhaedok-tang-against-helicobacter-pylori-induced-gastric-cell-injury
#15
Hee-Seon Park, Charith Ub Wijerathne, Hye-Yun Jeong, Chang-Seob Seo, Hyekyung Ha, Hyo-Jung Kwun
ETHNOPHARMACOLOGICAL RELEVANCE: Helicobacter pylori, which is found in the stomachs of approximately half of the world's population, has been associated with the development of chronic gastritis and gastric cancer. Hwanglyeonhaedok-tang (HHT) is a popular traditional medicine for the therapies of gastric ulcers and gastritis. AIM OF THE STUDY: The emerging resistance of H. pylori to antibiotics arouses requirement on alternative nonantibiotic-based therapies. In the present study, we investigated the anti-inflammatory activity and anti-microbial activity of HHT against H...
February 1, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29409307/prevalence-and-implications-of-bone-marrow-involvement-in-patients-with-gastric-mucosa-associated-lymphoid-tissue-lymphoma
#16
Sang Il Choi, Myeong-Cherl Kook, Sanghyun Hwang, Young-Il Kim, Jong Yeul Lee, Chan Gyoo Kim, Il Ju Choi, Hyewon Lee, Hyeon Seok Eom, Soo-Jeong Cho
Background/Aims: Mucosa-associated lymphoid tissue (MALT) lymphoma of the stomach is an uncommon disease. Bone marrow involvement is reported even in patients with only a mucosal lesion. We evaluated the prevalence and risk factors of marrow involvement and its implications for diagnosis and treatment. Methods: In total, 132 patients who were diagnosed with gastric MALT lymphoma at the National Cancer Center in Korea between January 2001 and December 2016 were enrolled in the study...
February 8, 2018: Gut and Liver
https://www.readbyqxmd.com/read/29407232/t-cell-subsets-play-an-important-role-in-the-determination-of-the-clinical-outcome-of-helicobacter-pylori-infection
#17
REVIEW
Abdollah Jafarzadeh, Tiziana Larussa, Maryam Nemati, Shila Jalapour
Helicobacter pylori (H. pylori) is one of the most prevalent human pathogen and a persistent infection with this bacterium causes common pathologies, such as gastritis or peptic ulcers, and also less common but more serious pathologies, such as gastric cancer or gastric mucosa-associated lymphoid tissue (MALT) lymphoma. The clinical outcome of gastrointestinal infection sustained by H. pylori is determined by the reciprocal interactions between virulence factors of the bacterium and host factors, including immune response genes...
January 30, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29403459/-helicobacter-pylori-and-gastric-cancer-adaptive-cellular-mechanisms-involved-in-disease-progression
#18
REVIEW
Paula Díaz, Manuel Valenzuela Valderrama, Jimena Bravo, Andrew F G Quest
Helicobacter pylori ( H. pylori ) infection is the major risk factor associated with the development of gastric cancer. The transition from normal mucosa to non-atrophic gastritis, triggered primarily by H. pylori infection, initiates precancerous lesions which may then progress to atrophic gastritis and intestinal metaplasia. Further progression to dysplasia and gastric cancer is generally believed to be attributable to processes that no longer require the presence of H. pylori . The responses that develop upon H...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29399610/deep-learning-analyzes-helicobacter-pylori-infection-by-upper-gastrointestinal-endoscopy-images
#19
Takumi Itoh, Hiroshi Kawahira, Hirotaka Nakashima, Noriko Yata
Background and study aims : Helicobacter pylori (HP)-associated chronic gastritis can cause mucosal atrophy and intestinal metaplasia, both of which increase the risk of gastric cancer. The accurate diagnosis of HP infection during routine medical checks is important. We aimed to develop a convolutional neural network (CNN), which is a machine-learning algorithm similar to deep learning, capable of recognizing specific features of gastric endoscopy images. The goal behind developing such a system was to detect HP infection early, thus preventing gastric cancer...
February 2018: Endoscopy International Open
https://www.readbyqxmd.com/read/29393912/common-variable-immunodeficiency-and-gastric-malignancies
#20
REVIEW
Patrizia Leone, Angelo Vacca, Franco Dammacco, Vito Racanelli
Common variable immunodeficiency (CVID) is an immunodeficiency disorder with a high incidence of gastrointestinal manifestations and an increased risk of gastric carcinoma and lymphoma. This review discusses the latest advancements into the immunological, clinical and diagnostic aspects of gastric malignancies in patients with CVID. The exact molecular pathways underlying the relationships between CVID and gastric malignancies remain poorly understood. These include genetics, immune dysregulation and chronic infections by Helicobacter pylori ...
February 2, 2018: International Journal of Molecular Sciences
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