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https://www.readbyqxmd.com/read/30453195/characterization-of-gastric-cells-infection-by-diverse-helicobacter-pylori-strains-through-fourier-transform-infrared-spectroscopy
#1
Vanda Marques, Bernardo Cunha, Andreia Couto, Pedro Sampaio, Luís P Fonseca, Sandra Aleixo, Cecília R C Calado
The infection of Helicobacter pylori, covering 50% of the world-population, leads to diverse gastric diseases as ulcers and cancer along the life-time of the human host. To promote the discovery of biomarkers of bacterial infection, in the present work, Fourier-transform infrared spectra were acquired from adenocarcinoma gastric cells, incubated with H. pylori strains presenting different genotypes concerning the virulent factors cytotoxin associated gene A and vacuolating cytotoxin A. Defined absorbance ratios were evaluated by diverse methods of statistical inference, according to the fulfillment of the tests assumptions...
November 5, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/30452960/predicting-protein-protein-interactions-by-fusing-various-chou-s-pseudo-components-and-using-wavelet-denoising-approach
#2
Baoguang Tian, Xue Wu, Cheng Chen, Wenying Qiu, Qin Ma, Bin Yu
Research on protein-protein interactions (PPIs) not only helps to reveal the nature of life activities but also plays a driving role in understanding the mechanisms of disease activity and the development of effective drugs. The rapid development of machine learning provides new opportunities and challenges for understanding the mechanism of PPIs. It plays an important role in the field of proteomics research. In recent years, an increasing number of computational methods for predicting PPIs have been developed...
November 16, 2018: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/30449800/relationship-of-helicobacter-pylori-infection-with-gastric-black-spots-shown-by-endoscopy
#3
Kyoichi Adachi, Takumi Notsu, Tomoko Mishiro, Yoshikazu Kinoshita
Objective The recently reported endoscopic finding of black spots is defined as black pigmentation in gastric mucosa. We attempted to clarify the relationship between the Helicobacter pylori infection status and black spot occurrence. Subjects and methods The study subjects were 1,600 individuals who underwent an annual medical checkup and whose H. pylori status could be determined. Upper endoscopic examinations were performed in all, and the presence of black spots in the stomach as well as the degree of gastric mucosal atrophy were determined...
November 19, 2018: Internal Medicine
https://www.readbyqxmd.com/read/30449773/gastric-xanthoma-is-a-predictive-marker-for-early-gastric-cancer-detected-after-helicobacter-pylori-eradication
#4
Narihiro Shibukawa, Shohei Ouchi, Shuji Wakamatsu, Yuhei Wakahara, Akira Kaneko
BACKGROUND: The detection of early gastric cancer (GC) after Helicobacter pylori eradication is expected to increase in Japan. However, the predictive markers for early GC detected after H. pylori eradication have not been extensively studied. We conducted a retrospective, single-center observational study to investigate the predictive markers for early GC detected after H. pylori eradiation. METHODS: A total of 421 patients underwent endoscopic submucosal dissection for early GC at NTT West Osaka Hospital between June 2006 and August 2017...
November 19, 2018: Internal Medicine
https://www.readbyqxmd.com/read/30449016/intensive-formation-of-coccoid-forms-as-a-feature-strongly-associated-with-highly-pathogenic-helicobacter-pylori-strains
#5
Paweł Krzyżek, Monika M Biernat, Grażyna Gościniak
The variability of Helicobacter pylori morphology and the heterogeneity of virulence factors expressed by these bacteria play a key role as a driving force for adaptation to the hostile stomach environment. The aim of the study was to determine the relationship between the presence of certain genes encoding virulence factors and H. pylori morphology. One reference and 13 clinical H. pylori strains with a known virulence profile (vacA, cagA, babA2, dupA, and iceA) were used in this study. Bacteria were cultured for 1 h and 24 h in stressogenic culture conditions, i...
November 17, 2018: Folia Microbiologica
https://www.readbyqxmd.com/read/30446816/efficacy-of-lactobacillus-supplemented-triple-therapy-for-helicobacter-pylori-infection-in-children-a-meta-analysis-of-randomized-controlled-trials
#6
REVIEW
Hao-Ran Fang, Guo-Qiang Zhang, Jing-Yi Cheng, Zhong-Yue Li
Therapy-related side effects and severe antimicrobial resistance still remain an obstacle to Helicobacter pylori eradication. This meta-analysis aimed to investigate the efficacy of Lactobacillus-supplemented triple therapy on H. pylori eradication rates and therapy-related side effects in children. Five studies involving 484 pediatric patients were included in our analysis. The pooled relative risk (RR) for eradication rates in the Lactobacillus group versus the control group was 1.19 [95% confidence interval (CI) 1...
November 16, 2018: European Journal of Pediatrics
https://www.readbyqxmd.com/read/30445864/isolation-purification-and-identification-of-two-new-alkaloids-metabolites-from-marine-derived-verrucosispora-sp-fim06025
#7
Ming-Hong Chen, Wen-Long Zhang, Li Chen, Ru Lin, Yang Xie, Dong-Sheng Fang, Yun-Yang Lian, Hong Jiang
Chemical investigation of a marine-derived actinomycete strain Verrucosispora sp. FIM06025 isolated from a marine sponge sample collected from the East China Sea, resulted in the discovery of two new alkaloids, (2-(hydroxymethyl)-3-(2-(hydroxymethyl)-3-methylaziridin-1-yl) (2-hydroxyphenyl) methanone (1) and 2-(1-hydroxyethyl)-3,4-dihydrobenzo [f] [1,4]oxazepin-5(2H)-one (2). The structures of compounds 1 and 2 were determined by the detailed analysis of 1D, 2D NMR and HR-TOF-MS data, along with literature data analysis...
November 16, 2018: Natural Product Research
https://www.readbyqxmd.com/read/30440101/review-of-antimicrobial-peptides-with-anti-helicobacter-pylori-activity
#8
REVIEW
Alireza Neshani, Hosna Zare, Mohammad Reza Akbari Eidgahi, Amin Hooshyar Chichaklu, Aref Movaqar, Kiarash Ghazvini
BACKGROUND: The emergence of antibiotic-resistant Helicobacter pylori strains in recent years has increased the need for finding an alternative in the post-antibiotic era. One of the fields being considered for this purpose is antimicrobial peptides. The aim of this review was to provide an obvious scheme from the studied anti-H. pylori peptides and to investigate their common features. METHOD: First, all of the antimicrobial peptides with their anti-H. pylori effects have been proved up to September 2018 were selected and their information including structure, mechanism of action, and function was reviewed...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30440100/halitosis-helicobacter-pylori-or-oral-factors
#9
Fahimeh Anbari, Anahita Ashouri Moghaddam, Elham Sabeti, Azin Khodabakhshi
INTRODUCTION: Halitosis is a common complaint among people which has various socioeconomic effects. The prevalence of halitosis includes a variety of 22% up to 50% in different societies. According to studies, there have been reports of remarkable improvements in halitosis after Helicobacter pylori eradication treatment. In studies on the relationship between H. Pylori and halitosis, the role of oral factors as the most important cause of halitosis has been neglected. This study was conducted with the aim of investigating the effect of oral factors on halitosis in patients with H...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30440097/relative-potency-of-proton-pump-inhibitors-helicobacter-pylori-therapy-cure-rates-and-meaning-of-double-dose-ppi
#10
David Y Graham, Hong Lu, Maria Pina Dore
BACKGROUND: Helicobacter pylori treatment recommendations often recommend use of double-dose PPI or greater. This is confusing because PPIs very markedly in relative potency such that a double dose of one may not even be equivalent to the single dose of another. OBJECTIVE: To relate the concept of double-dose to specific amounts of the different PPIs METHODS: We used data standardizing PPI potency in terms of the duration of intragastric pH >4/24 hours (pH4-time) to rank PPIs...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30440093/evaluation-of-gastric-microbiome-and-metagenomic-function-in-patients-with-intestinal-metaplasia-using-16s-rrna-gene-sequencing
#11
Chan Hyuk Park, A-Reum Lee, Yu-Ra Lee, Chang Soo Eun, Sang Kil Lee, Dong Soo Han
BACKGROUND: Despite recent advances in studies on the gastric microbiome, the role of the non-Helicobacter pylori gastric microbiome in gastric carcinogenesis remains unclear. We evaluated the characteristics of the gastric microbiome and metagenomic functions in patients with IM. METHODS: Participants were classified into six groups according to disease status (chronic superficial gastritis [CSG], intestinal metaplasia [IM], and cancer) and H. pylori- infection status (H...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30439429/molecular-interaction-between-human-sumo-i-and-histone-like-dna-binding-protein-of-helicobacter-pylori-hup-investigated-by-nmr-and-other-biophysical-tools
#12
Nancy Jaiswal, Nipanshu Agarwal, Anupreet Kaur, Sarita Tripathy, Gagandeep Kaur Gahlay, Ashish Arora, Venus Singh Mitthu, Krishna Mohan Poluri, Dinesh Kumar
The proteins secreted by bacteria contribute to immune mediated gastric inflammation and epithelial damage; thus aid bacterial invasion in host tissue, and may also interact with host proteins, conspirating a mechanism against host-immune system. The Histone-like DNA binding protein is one of the most abundant nucleoid-associated proteins in Helicobacter pylori (H. pylori). The protein -referred here as Hup- is also secreted in vitro by H. pylori, thus it may have its role in disease pathogenesis. This is possible only if Hup interact with some human proteins including Small-Ubiquitin-like-Modifier (SUMO) proteins...
November 12, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/30431691/prevalence-of-helicobacter-pylori-infection-among-junior-high-school-students-in-grudziadz-poland
#13
Anna Szaflarska-Popławska, Anetta Soroczyńska-Wrzyszcz
BACKGROUND: The purpose of the study was to assess the prevalence of Helicobacter pylori infection among the junior high school students in city Grudziądz, Poland. MATERIALS AND METHODS: A prospective cross-sectional study among second junior high school students was conducted from September 2008 to June 2015 during seven consecutive school years. The studied group was 3241 students 13-17 years old. The 13 C-urea breath test (UBT) was administered to all participants for current H...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30431685/helicobacter-pylori-infection-and-prevalence-of-stroke
#14
Tali Shindler-Itskovitch, Gabriel Chodick, Varda Shalev, Khitam Muhsen
BACKGROUND: Helicobacter pylori causes peptic ulcer disease; however, conflicting evidence exists regarding its role in extragastric conditions. We aimed to examine associations of H pylori infection and peptic ulcer disease with stroke. METHODS: A cross-sectional study was undertaken using data of 147 936 individuals aged 25-95 years who underwent the urea breath test during 2002-2012, based on the computerized database of the second largest health maintenance organization in Israel...
November 15, 2018: Helicobacter
https://www.readbyqxmd.com/read/30431613/the-associations-among-helicobacter-pylori-infection-white-blood-cell-count-and-nonalcoholic-fatty-liver-disease-in-a-large-chinese-population
#15
Ying-Ying Yu, Jian-Ting Cai, Zhen-Ya Song, Yu-Ling Tong, Jing-Hua Wang
Reported relationships among Helicobacter pylori infection, white blood cell (WBC) count and nonalcoholic fatty liver disease (NAFLD) are inconsistent and controversial. We, therefore, conducted a cross-sectional study to investigate the associations among the presence of NAFLD, WBC count and H pylori infection, as diagnosed using the C-urea breath test (UBT).This study included 20,389 subjects enrolled at the International Health Care Center of the Second Affiliated Hospital of the Zhejiang University School of Medicine from January 2015 to December 2015...
November 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/30431605/modified-quadruple-therapy-versus-bismuth-containing-quadruple-therapy-in-first-line-treatment-of-helicobacter-pylori-infection-in-korea-rationale-and-design-of-an-open-label-multicenter-randomized-controlled-trial
#16
Hyun Lim, Chang Seok Bang, Woon Geon Shin, Jae Ho Choi, Jae Seung Soh, Ho Suk Kang, Young Joo Yang, Ji Taek Hong, Suk Pyo Shin, Ki Tae Suk, Jae Jun Lee, Gwang Ho Baik, Dong Joon Kim
BACKGROUND: Clarithromycin-containing triple regimen for eradication of Helicobacter pylori is no longer acceptable in Korea due to high clarithromycin resistance. Concomitant therapy or bismuth-containing quadruple therapy is recommended as an alternative regimen. A recent study in Korea has shown that modified quadruple therapy has comparable efficacy and safety to concomitant therapy as a first-line regimen. However, there has been no comparative study of modified quadruple therapy with bismuth-containing quadruple therapy...
November 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/30430119/-helicobacter-pylori-may-be-an-initiating-factor-in-newly-diagnosed-ulcerative-colitis-patients-a-pilot-study
#17
Loai Mansour, Ferial El-Kalla, Abdelrahman Kobtan, Sherief Abd-Elsalam, Mohamed Yousef, Samah Soliman, Lobna Abo Ali, Walaa Elkhalawany, Ibrahim Amer, Heba Harras, Maha M Hagras, Mohamed Elhendawy
AIM: To directly visualize Helicobacter pylori ( H. pylori ) by the highly sensitive and specific technique of immunohistochemical staining in colonic tissue from patients newly diagnosed with ulcerative colitis (UC). METHODS: Colonoscopic biopsies from thirty patients with newly diagnosed UC and thirty controls were stained with Giemsa stain and immunohistochemical stain for detection of H. pylori in the colonic tissue. Results were confirmed by testing H. pylori Ag in the stool then infected patients were randomized to receive either anti H...
November 6, 2018: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/30428917/highly-clarithromycin-resistant-helicobacter-pylori-infection-in-asymptomatic-children-from-a-rural-community-of-cajamarca-peru
#18
Miguel Angel Aguilar-Luis, Fernando Palacios-Cuervo, Fátima Espinal-Reyes, Andrea Calderón-Rivera, Saúl Levy-Blitchtein, Carlos Palomares-Reyes, Wilmer Silva-Caso, Victor Zavaleta-Gavidia, Jorge Bazán-Mayra, Angela Cornejo-Tapia, Juana Del Valle-Mendoza, Luis J Del Valle
OBJECTIVE: The objective of this study was to determine the prevalence of clarithromycin-resistant Helicobacter pylori in asymptomatic children in a rural community of Cajamarca (northern Peru). RESULTS: Helicobacter pylori was detected in 17.2% (49/285) of the samples. Unboiled water consumption the most frequent associated factor in patients with positive PCR for H. pylori infection (93.9%). Clarithromycin resistant mutations were found in 79.6% (39/49) of the positive samples for H...
November 14, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/30427843/gastroesophageal-reflux-disease-in-an-area-with-low-helicobacter-pylori-infection-prevalence
#19
Muhammad Miftahussurur, Dalla Doohan, Iswan Abbas Nusi, Pangestu Adi, Yudith Annisa Ayu Rezkitha, Langgeng Agung Waskito, Kartika Afrida Fauzia, Taufan Bramantoro, Ummi Maimunah, Husin Thamrin, Safitri Indah Masithah, Sukadiono Sukadiono, Tomohisa Uchida, Maria Inge Lusida, Yoshio Yamaoka
The association between gastroesophageal reflux disease (GERD) prevalence and its risk factors in an area with low Helicobacter pylori prevalence is important to clarify. We analyzed the prevalence of GERD and risk factors in an area of Indonesia with low prevalence of H. pylori infection. We recruited 104 dyspeptic patients who underwent endoscopy in Surabaya. Patients were diagnosed with GERD based on the Los Angeles classification. We evaluated gastric biopsy specimens and measured serum pepsinogen levels...
2018: PloS One
https://www.readbyqxmd.com/read/30424932/gastric-malt-lymphoma-and-helicobacter-pylori
#20
REVIEW
Antonio Salar
Marginal zone lymphomas of the MALT type are a type of B-cell neoplasms that involve extranodal tissues and have an indolent clinical behaviour. The stomach is the most common site and most patients are infected by Helicobacter pylori. An increase in the resistance of this bacterium to several antibiotics has been observed in the last years and this fact has determined the review of treatment guidelines. In areas with resistance to clarithromycin greater than 15%, classical triple therapy should be abandoned and quadruple regimens with or without bismuth are currently recommended...
November 10, 2018: Medicina Clínica
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