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Helicobacter

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https://www.readbyqxmd.com/read/28805287/nongenetically-modified-lactococcus-lactis-adjuvanted-vaccination-enhanced-innate-immunity-against-helicobacter-pylori
#1
Wei Liu, Zhoulin Tan, Hai Liu, Zhiqin Zeng, Shuanghui Luo, Huimin Yang, Lufeng Zheng, Tao Xi, Yingying Xing
BACKGROUND: Gram-positive enhancer matrix particles (GEM) produced by Lactococcus lactis can enhance vaccine-induced immune response. However, the mechanism under which this adjuvant mounts the efficacy of orally administered vaccines remains unexplored. MATERIALS AND METHODS: We used a prophylactic mice model to investigate the mechanism of GEM-adjuvanted vaccination. Helicobacter pylori urease-specific antibody response was monitored and detected in murine serum by ELISA...
August 14, 2017: Helicobacter
https://www.readbyqxmd.com/read/28799687/upfront-immunohistochemistry-improves-specificity-of-helicobacter-pylori-diagnosis-a-french-pathology-laboratory-point-of-view
#2
Florent Ginestet, Briac Guibourg, Laurent Doucet, Jérémie Théreaux, Michel Robaszkiewicz, Pascale Marcorelles, Arnaud Uguen
BACKGROUND: There is no consensus about the histopathologic methods to detect Helicobacter pylori in gastric biopsies to date. We aimed to question about the value of upfront anti-H. pylori immunohistochemistry in this field. MATERIAL AND METHODS: We led a retrospective study about the rate of H. pylori-positive gastric biopsies before and after the implementation of upfront immunohistochemistry, the inter-rater and intermethods agreements in H. pylori identification about Hematoxylin-Eosin Saffron (HES), Giemsa, and immunohistochemistry stains and the histopathologic features associated with low amounts of H...
August 11, 2017: Helicobacter
https://www.readbyqxmd.com/read/28799681/genomic-and-clinical-evidence-uncovers-the-enterohepatic-species-helicobacter-valdiviensis-as-a-potential-human-intestinal-pathogen
#3
Pablo Fresia, Ronald Jara, Rafael Sierra, Ignacio Ferrés, Gonzalo Greif, Gregorio Iraola, Luis Collado
BACKGROUND: Helicobacter valdiviensis is a recently described enterohepatic species isolated from wild bird's fecal samples. Currently, its pathogenic potential and clinical significance are unknown mainly due to the lack of whole-genome sequences to compare with other helicobacters and the absence of specific screenings to determine its prevalence in humans. MATERIALS AND METHODS: The species type strain (WBE14(T) ) was whole-genome-sequenced, and comparative analyses were carried out including the genomes from other Helicobacter species to determine the exact phylogenetic position of H...
August 11, 2017: Helicobacter
https://www.readbyqxmd.com/read/28771894/effect-on-helicobacter-pylori-eradication-therapy-against-gastric-cancer-in-japan
#4
Momoko Tsuda, Masahiro Asaka, Mototsugu Kato, Rumiko Matsushima, Kenji Fujimori, Kozo Akino, Shogo Kikuchi, Yingsong Lin, Naoya Sakamoto
BACKGROUND: In Japan, there have been approximately 50 000 deaths from gastric cancer annually for over 40 years with little variation. It has been reported that most gastric cancers in Japan are caused by Helicobacter pylori infection. H. pylori eradication therapy was approved for patients with chronic gastritis by the Japanese national health insurance scheme in February 2013 for patients with an endoscopic diagnosis of chronic gastritis is positive for H. pylori. We examined the effect on gastric cancer death rate 4 years after expansion of health insurance coverage...
August 3, 2017: Helicobacter
https://www.readbyqxmd.com/read/28771880/limited-effectiveness-with-a-10-day-bismuth-containing-quadruple-therapy-pylera-%C3%A2-in-third-line-recue-treatment-for-helicobacter-pylori-infection-a-real-life-multicenter-study
#5
Enrique Rodríguez de Santiago, Carlos Martín de Argila de Prados, Hector Miguel Marcos Prieto, Miguel Ãngel Jorge Turrión, Eva Barreiro Alonso, Alvaro Flores de Miguel, Cristobal de la Coba Ortiz, Carlos Rodríguez Escaja, Gustavo Pérez Álvarez, Carlos Ferre Aracil, Lara Aguilera Castro, Ana García García de Paredes, Antonio Rodríguez Pérez, Agustin Albillos Martínez
BACKGROUND: Helicobacter pylori antibiotic resistance is an increasing problem worldwide. Pylera(®) may be an option as salvage therapy. AIM: To assess the effectiveness, safety, and tolerance of Pylera(®) as a third-line in clinical practice. MATERIALS AND METHODS: This was a multicenter, observational, prospective database study in four Spanish hospitals. Consecutive H. pylori-infected individuals treated with Pylera(®) and a proton-pump inhibitor (PPI) were invited to participate if they had failed to respond to PPI-clarithromycin-amoxicillin as first-line and to levofloxacin-amoxicillin-PPI as second-line therapy...
August 3, 2017: Helicobacter
https://www.readbyqxmd.com/read/28737284/antibody-reactivity-against-helicobacter-pylori-proteins-in-a-sample-of-the-spanish-adult-population-in-2008-2013
#6
Nerea Fernández-de-Larrea, Angelika Michel, Beatriz Romero, Julia Butt, Michael Pawlita, Beatriz Pérez-Gómez, Gemma Castaño-Vinyals, Victor Moreno, Vicente Martín, Pilar Amiano, Jesús Castilla, Guillermo Fernández-Tardón, Trinidad Dierssen-Sotos, Juan Clofent, Juan Alguacil, José María Huerta, José Juan Jiménez-Moleón, Aurelio Barricarte, Amaia Molinuevo, Tania Fernández-Villa, Delphine Casabonne, Ángeles Sierra, Manolis Kogevinas, Silvia de Sanjosé, Marina Pollán, Rosa Del Campo, Tim Waterboer, Nuria Aragonés
BACKGROUND: Differences in Helicobacter pylori protein expression have been related to the risk of severe gastric diseases. In Spain, a marked geographic pattern in gastric cancer mortality has long been reported. OBJECTIVE: To characterize antibody reactivity patterns against 16 H. pylori proteins, by age, sex, and region of birth, in a large sample of the Spanish adult population. MATERIALS AND METHODS: Antibody reactivity was quantified by H...
July 24, 2017: Helicobacter
https://www.readbyqxmd.com/read/28653787/antibacterial-resistance-and-the-success-of-tailored-triple-therapy-in-helicobacter-pylori-strains-isolated-from-slovenian-children
#7
Tita Butenko, Samo Jeverica, Rok Orel, Matjaž Homan
BACKGROUND: Primary Helicobacter pylori (H. pylori) infection occurs predominantly in childhood. Antimicrobial resistance is the leading cause for H. pylori eradication failure. The aims of this study were (i) to establish for the first time the antimicrobial resistance of H. pylori strains in infected Slovenian children not previously treated for H. pylori infection and (ii) to evaluate the effectiveness of tailored triple therapy, assuming that eradication rate with tailored triple therapy will be >90%...
June 27, 2017: Helicobacter
https://www.readbyqxmd.com/read/28643393/prevalence-and-dynamics-of-helicobacter-pylori-infection-during-childhood
#8
REVIEW
Beatriz Zabala Torrres, Yalda Lucero, Anne J Lagomarcino, Andrea Orellana-Manzano, Sergio George, Juan P Torres, Miguel O'Ryan
INTRODUCTION: Long-term persistent Helicobacter pylori infection has been associated with ulceropeptic disease and gastric cancer. Although H. pylori is predominantly acquired early in life, a clear understanding of infection dynamics during childhood has been obfuscated by the diversity of populations evaluated, study designs, and methods used. AIM: Update understanding of true prevalence of H. pylori infection during childhood, based on a critical analysis of the literature published in the past 5 years...
June 23, 2017: Helicobacter
https://www.readbyqxmd.com/read/28598012/association-of-helicobacter-pylori-infection-with-parkinson-s-diseases-a-meta-analysis
#9
REVIEW
Xiaoli Shen, Huazhen Yang, Yili Wu, Dongfeng Zhang, Hong Jiang
BACKGROUND: The results from observational studies on the relationship between helicobacter pylori (H. pylori) infection and Parkinson's disease remain controversial. A meta-analysis was conducted to evaluate the association between helicobacter pylori infection and Parkinson's disease. METHODS: A comprehensive literature search was performed on relevant studies published from January 1983 to January 2017 in PubMed, Web of Science and EMBASE databases. The fixed or random effects model was used to pool the odds ratio with 95% confidence interval from individual studies...
June 9, 2017: Helicobacter
https://www.readbyqxmd.com/read/28557128/detection-of-gastric-atrophy-by-circulating-pepsinogens-a-comparison-of-three-assays
#10
Marcis Leja, M Constanza Camargo, Inese Polaka, Sergejs Isajevs, Inta Liepniece-Karele, Dainius Janciauskas, Dace Rudzite, Ilze Kikuste, Aigars Vanags, Ilona Kojalo, Valdis Folkmanis, Arnis Kirsners, Ivars Tolmanis, Charles S Rabkin
BACKGROUND: Circulating levels of pepsinogens have been used in high gastric cancer-risk Asian and European populations to triage endoscopic evaluation for more severe pathology. There are different analytic methods with uncertain correlations. We therefore compared diagnostic performance of three commonly used pepsinogen assays to detect histologically confirmed gastric atrophy. METHODS: We tested plasma samples from adult patients with (n=50) and without (n=755) moderate or severe gastric corpus atrophy, as determined histologically by consensus of three expert pathologists...
May 29, 2017: Helicobacter
https://www.readbyqxmd.com/read/28677898/helicobacter-pylori-modulates-cisplatin-sensitivity-in-gastric-cancer-by-down-regulating-mir-141-expression
#11
Xiaoying Zhou, Jing Su, Li Zhu, Guoxin Zhang
No abstract text is available yet for this article.
August 2017: Helicobacter
https://www.readbyqxmd.com/read/28464347/optimization-strategies-aimed-to-increase-the-efficacy-of-h-%C3%A2-pylori-eradication-therapies
#12
REVIEW
Javier P Gisbert, Adrian G McNicholl
BACKGROUND: As with any other infectious disease, we should aim for treatments offering ≥90% Helicobacter pylori eradication rates in clinical practice. AIM: To summarize optimization strategies aimed to increase the efficacy of H. pylori eradication therapies. METHODS: A systematic bibliographic search (in PubMed up to August 2016) was designed to identify studies investigating optimization strategies aimed to increase the efficacy of H...
August 2017: Helicobacter
https://www.readbyqxmd.com/read/28436616/reduced-infectivity-of-waterborne-viable-but-nonculturable-helicobacter-pylori-strain-ss1-in-mice
#13
Kevin F Boehnke, Kathryn A Eaton, Clinton Fontaine, Rebecca Brewster, Jianfeng Wu, Joseph N S Eisenberg, Manuel Valdivieso, Laurence H Baker, Chuanwu Xi
BACKGROUND: Helicobacter pylori infection has been consistently associated with lack of access to clean water and proper sanitation, but no studies have demonstrated that the transmission of viable but nonculturable (VBNC) H. pylori can occur from drinking contaminated water. In this study, we used a laboratory mouse model to test whether waterborne VBNCH. pylori could cause gastric infection. MATERIALS AND METHODS: We performed five mouse experiments to assess the infectivity of VBNCH...
August 2017: Helicobacter
https://www.readbyqxmd.com/read/28299869/helicobacter-pylori-infection-is-associated-with-reduced-prevalence-of-colonic-diverticular-disease
#14
Lars Erik Bartels, Peter Jepsen, Anders Tøttrup, Hendrik Vilstrup, Jens Frederik Dahlerup
BACKGROUND: Colonic diverticular disease is a common disorder with increasing incidence in Western societies. The intestinal microbiome may be among etiological factors. Helicobacter pylori may protect against some intestinal diseases, and incidence of H. pylori is decreasing in Western societies. Thus, we aimed to determine whether H. pylori is associated to decreased prevalence of registered colonic diverticular disease. MATERIALS AND METHODS: In a historical cohort study, patients were enrolled from primary health care centers after urea breath test for H...
August 2017: Helicobacter
https://www.readbyqxmd.com/read/28271597/population-genetic-structure-of-helicobacter-pylori-strains-from-portuguese-speaking-countries
#15
Mónica Oleastro, Raquel Rocha, Filipa F Vale
BACKGROUND: The human gastric colonizer Helicobacter pylori is useful to track human migrations given the agreement between the bacterium phylogeographic distribution and human migrations. As Portugal was an African and Brazilian colonizer for over 400 years, we hypothesized that Portuguese isolates were likely genetically closer with those from countries colonized by Portuguese in the past. We aimed to characterize the population structure of several Portuguese-speaking countries, including Portugal, Brazil, Angola, and Cape Verde...
August 2017: Helicobacter
https://www.readbyqxmd.com/read/28111844/autophagy-related-genes-in-helicobacter-pylori-infection
#16
Shingo Tanaka, Hiroyuki Nagashima, Takahiro Uotani, David Y Graham, Yoshio Yamaoka
BACKGROUND: In vitro studies have shown that Helicobacter pylori (H. pylori) infection induces autophagy in gastric epithelial cells. However, prolonged exposure to H. pylori reduces autophagy by preventing maturation of the autolysosome. The alterations of the autophagy-related genes in H. pylori infection are not yet fully understood. MATERIALS AND METHODS: We analyzed autophagy-related gene expression in H. pylori-infected gastric mucosa compared with uninfected gastric mucosa obtained from 136 Bhutanese volunteers with mild dyspeptic symptoms...
June 2017: Helicobacter
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
#17
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...
June 2017: Helicobacter
https://www.readbyqxmd.com/read/28544222/usefulness-of-detection-of-clarithromycin-resistant-helicobacter-pylori-from-fecal-specimens-for-young-adults-treated-with-eradication-therapy
#18
Takako Osaki, Katsuhiro Mabe, Cynthia Zaman, Hideo Yonezawa, Masumi Okuda, Kenji Amagai, Shinji Fujieda, Mitsuhide Goto, Wataru Shibata, Mototsugu Kato, Shigeru Kamiya
BACKGROUND: To prevent Helicobacter pylori infection in the younger generation, it is necessary to investigate the prevalence of antibiotic-resistant H. pylori. OBJECTIVE: The aim of this study was to evaluate the method of PCR-based sequencing to detect clarithromycin (CAM) resistance-associated mutations using fecal samples as a noninvasive method. METHODS: DNA extracted from fecal specimens and isolates from gastric biopsy specimens were collected from patients with H...
May 22, 2017: Helicobacter
https://www.readbyqxmd.com/read/28544172/phylogeographic-agreement-between-prophage-and-bacterial-housekeeping-genes-in-helicobacter-pylori-strains-from-the-gambia
#19
LETTER
Ousman Secka, Filipa F Vale, Alice Buissonnière, Julian E Thomas, Francis Mégraud, Philippe Lehours
No abstract text is available yet for this article.
May 22, 2017: Helicobacter
https://www.readbyqxmd.com/read/28524341/randomized-controlled-study-of-a-novel-triple-nitazoxanide-ntz-containing-therapeutic-regimen-versus-the-traditional-regimen-for-eradication-of-helicobacter-pylori-infection
#20
Mona Ah Shehata, Raghda Talaat, Samah Soliman, Huda Elmesseri, Shaimaa Soliman, Sherief Abd-Elsalam
BACKGROUND: Helicobacter pylori infection has become more and more resistant to conventional first-line treatment regimens. So, there is a considerable interest in evaluating new antibiotic combinations and regimens. Nitazoxanide is an anti-infective drug with demonstrated activity against protozoa and anaerobic bacteria including H. pylori. This work is designed to evaluate the efficacy and safety of a unique triple nitazoxanide-containing regimen as a treatment regimen in Egyptian patients with H...
May 19, 2017: Helicobacter
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