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https://www.readbyqxmd.com/read/27914159/-molecular-mechanisms-for-adhesion-and-colonization-of-human-gastric-mucosa-by-helicobacter-pylori-and-its-clinical-implications
#1
REVIEW
Elisabete Coelho, Ana Magalhães, Mário Dinis-Ribeiro, Celso A Reis
INTRODUCTION: Helicobacter pylori infection is very prevalent worldwide and is associated with the progression of the gastric carcinogenesis cascade, being one of the main risk factors for the development of gastric carcinoma. Several factors are determinant for the infection and for the development of gastric disease, including environmental factors, host genetic factors and virulence factors of the bacteria. MATERIAL AND METHODS: In this review, we present an overview of the current knowledge on the determinants of the infection and on the recently described molecular mechanisms of Helicobacter pylori adhesion to the gastric mucosa, as well as its possible future therapeutic application...
August 2016: Acta Médica Portuguesa
https://www.readbyqxmd.com/read/27914074/common-challenges-in-studying-the-structure-and-function-of-bacterial-proteins-case-studies-from-helicobacter-pylori
#2
Daniel A Bonsor, Eric J Sundberg
Employing biophysical and structural methods is a powerful way to elucidate mechanisms of molecular recognition in bacterial pathogenesis. Such studies invariably depend on the production of pure, folded and stable proteins. Many proteins that can be expressed recombinantly ultimately fail to meet one or more of these criteria. The cag proteins from Helicobacter pylori form a secretion system that delivers the oncoprotein, CagA, into human gastric epithelial cells through an interaction between CagL and host cell integrins, where it can cause gastric adenocarcinoma...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27914028/suboptimal-weight-loss-and-weight-regain-after-gastric-bypass-surgery-postoperative-status-of-energy-intake-eating-behavior-physical-activity-and-psychometrics
#3
Tina Amundsen, Magnus Strømmen, Catia Martins
BACKGROUND: Suboptimal weight loss (SWL) and weight regain (WR) after gastric bypass surgery (GB) remains poorly understood. OBJECTIVES: This study aims to compare GB patients experiencing SWL or significant WR (SigWR) with successful controls, regarding postoperative food intake, eating behavior, physical activity (PA), and psychometrics. METHODS: Forty-nine patients with >1 year post-surgery were classified as either experiencing SWL (excess body weight loss, EWL, <50%, n = 22) or SigWR (total weight regain ≥15%, n = 38), with respective control groups...
December 2, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27913994/sox2-inhibition-promotes-promoter-demethylation-of-cdx2-to-facilitate-gastric-intestinal-metaplasia
#4
Haijing Niu, Yuchen Jia, Tao Li, Bingzhong Su
BACKGROUND: Gastric intestinal metaplasia (IM) is regarded as a premalignant lesion, conferring risks for gastric cancer development. An intestinal transcription factor, CDX2, plays a vital role in establishing and maintaining IM. SOX2, an HMG-box transcription factor, is expressed in normal gastric mucosa and downregulated in IM. Therefore, it is important to elucidate the mutual interaction of SOX2 and CDX2 in gastric IM. AIMS: This study aims to evaluate the negative correlation between SOX2 and CDX2 in mRNA expression and promoter methylation and to illuminate the effect of SOX2 on the promoter methylation of CDX2...
December 2, 2016: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/27913881/phase-ii-trial-of-s-1-plus-leucovorin-in-patients-with-advanced-gastric-cancer-and-clinical-prediction-by-s-1-pharmacogenetic-pathway
#5
Ming-Ming He, Dong-Sheng Zhang, Feng Wang, Zi-Xian Wang, Shu-Qiang Yuan, Zhi-Qiang Wang, Hui-Yan Luo, Chao Ren, Miao-Zhen Qiu, Ying Jin, De-Shen Wang, Dong-Liang Chen, Zhao-Lei Zeng, Yu-Hong Li, Yang-Yang He, Yuan-Tao Hao, Pi Guo, Feng-Hua Wang, Yi-Xin Zeng, Rui-Hua Xu
BACKGROUND: The first one-arm phase II trial aimed to evaluate and predict efficacy and safety of S-1 plus oral leucovorin (S-1/LV) as first-line chemotherapy for patients with advanced gastric cancer (AGC), using S-1 pharmacogenetic pathway approach. PATIENTS AND METHODS: A total of 39 patients orally took S-1 at conventional dose and LV simultaneously at a dose of 25 mg twice daily for a week, within a 2-week cycle. The primary endpoint was overall response rate (ORR), while the secondary endpoints were progression-free survival (PFS), time to failure (TTF), overall survival (OS), disease control rate (DCR), and adverse events (AEs)...
December 2, 2016: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/27913816/genetic-ablation-or-pharmacologic-inhibition-of-autophagy-mitigated-nsaid-associated-gastric-damages
#6
Chan Young Ock, Jong-Min Park, Young-Min Han, Migyeong Jeong, Mi-Young Kim, Ho Jae Lee, Ki Baik Hahm
: Non-steroidal anti-inflammatory drug (NSAID)-associated endoplasmic reticulum (ER) stress (a cyclooxygenase-2-independent mechanism) and consequent autophagic cell death are responsible for NSAID-associated gastric damage. Therefore, alleviating cytotoxicity executed via ER stress and autophagy can be a strategy to prevent NSAID-associated gastric damage. Here, we explored whether genetic or pharmacologic inhibition of autophagy can mitigate NSAID-associated gastric damage in in vitro and in vivo models...
December 2, 2016: Journal of Molecular Medicine: Official Organ of the "Gesellschaft Deutscher Naturforscher und Ärzte"
https://www.readbyqxmd.com/read/27913793/inflammatory-signaling-pathways-induced-by-helicobacter-pylori-in-primary-human-gastric-epithelial-cells
#7
Cong Tri Tran, Magali Garcia, Martine Garnier, Christophe Burucoa, Charles Bodet
Inflammatory signaling pathways induced by Helicobacter pylori remain unclear, having been studied mostly on cell-line models derived from gastric adenocarcinoma with potentially altered signaling pathways and nonfunctional receptors. Here, H. pylori-induced signaling pathways were investigated in primary human gastric epithelial cells. Inflammatory response was analyzed on chemokine mRNA expression and production after infection of gastric epithelial cells by H. pylori strains, B128 and B128ΔcagM, a cag type IV secretion system defective strain...
December 1, 2016: Innate Immunity
https://www.readbyqxmd.com/read/27913235/laparoscopic-gastric-bypass-versus-laparoscopic-sleeve-gastrectomy-a-retrospective-multicenter-comparison-between-early-and-long-term-post-operative-outcomes
#8
Fabio Rondelli, Walter Bugiantella, Maria Cristina Vedovati, Enrico Mariani, Ruben Carlo Balzarotti Canger, Sara Federici, Adriano Guerra, Marcello Boni
BACKGROUND: Laparoscopic Roux-en-Y gastric bypass (LRYGB) and laparoscopic sleeve gastrectomy (LSG) are the most commonly performed procedures for morbid obesity. METHODS: We performed a retrospective review of patients undergoing LRYGB or LSG between August 2000 and November 2014. RESULTS: Data from 581 (280 LSG and 301 LRYGB) were gathered. Operating time (77.6 vs 250.5 min; p < 0.001), post-operative complication rate (3.9% vs 11...
November 29, 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27913121/loss-of-control-eating-after-sleeve-gastrectomy-surgery
#9
Valentina Ivezaj, Erin E Kessler, Janet A Lydecker, Rachel D Barnes, Marney A White, Carlos M Grilo
BACKGROUND: Postoperative loss-of-control (LOC) eating is related to poorer weight loss outcomes after bariatric surgery, but little is known about LOC eating after sleeve gastrectomy surgery. OBJECTIVES: To examine LOC eating severity and weight loss after sleeve gastrectomy SETTING: University School of Medicine, United States METHODS: Participants were 71 individuals (84.5% female; n = 60) who underwent sleeve gastrectomy surgery within the previous 4 to 9 months and reported LOC eating at least once weekly during the previous 28 days...
October 1, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/27912678/the-physiology-and-molecular-underpinnings-of-the-effects-of-bariatric-surgery-on-obesity-and-diabetes
#10
Simon S Evers, Darleen A Sandoval, Randy J Seeley
Bariatric surgeries, such as Roux-en-Y gastric bypass and vertical sleeve gastrectomy, produce significant and durable weight loss in both humans and rodents. Recently, these surgical interventions have also been termed metabolic surgery because they result in profound metabolic improvements that often surpass the expected improvement due to body weight loss alone. In this review we focus on the weight-loss independent effects of bariatric surgery, which encompass energy expenditure and macronutrient preference, the luminal composition of the gut (i...
November 28, 2016: Annual Review of Physiology
https://www.readbyqxmd.com/read/27912030/perinatal-outcomes-and-the-influence-of-maternal-characteristics-after-roux-en-y-gastric-bypass-surgery
#11
Cristiane Chagas, Cláudia Saunders, Silvia Pereira, Jacqueline Silva, Carlos Saboya, Andréa Ramalho
OBJECTIVE: Assess the perinatal outcomes and identify what maternal characteristics can influence them in women who had undergone Roux-en-Y gastric bypass (RYGB). MATERIALS AND METHODS: Analytical, prospective, and longitudinal study with pregnant adult women. INCLUSION CRITERIA: chronological age >20 years; singleton pregnancy; RYGB surgery before pregnancy. EXCLUSION CRITERIA: prior malabsorptive or restrictive surgeries; malabsorption syndrome...
December 2, 2016: Journal of Women's Health
https://www.readbyqxmd.com/read/27911869/paclitaxel-oxaliplatin-fluorouracil-tof-regimen-versus-s-1-oxaliplatin-sox-regimen-for-metastatic-gastric-cancer-patients
#12
Xichao Dai, Xizhi Zhang, Chaomin Wang, Jingting Jiang, Changping Wu
AIMS AND BACKGROUND: This study was designed to compare the efficacy and safety of paclitaxel/oxaliplatin/fluorouracil (TOF) regimen and S-1/oxaliplatin (SOX) regimen for metastatic gastric cancer (GC) patients. METHODS: Sixty patients were divided into TOF group and SOX groups randomly. Patients in the TOF group received paclitaxel (135 mg/m2 iv) on day 1, oxaliplatin (100 mg/m2 iv) on day 1, fluorouracil (500 mg/m2 continuous iv) on day 1-5. The patients in the SOX group received oxaliplatin (130 mg/m2 iv) on day 1 and S-1 (40 mg~60mg orally twice/day based on body surface area) on days 1-14...
November 30, 2016: Oncotarget
https://www.readbyqxmd.com/read/27911861/pyruvate-kinase-m2-pkm2-expression-correlates-with-prognosis-in-solid-cancers-a-meta-analysis
#13
Haiyan Zhu, Hui Luo, Xuejie Zhu, Xiaoli Hu, Lihong Zheng, Xueqiong Zhu
Pyruvate kinase M2 (PKM2) is the key enzyme in the Warburg effect and plays a central role in cancer cell metabolic reprogramming. Recently, quite a few studies have investigated the correlation between PKM2 expression and prognosis in multiple cancer patients, but results were inconsistent. We therefore performed a meta-analysis to explore the prognostic value of PKM2 expression in patients with solid cancer. Here twenty-seven individual studies from 25 publications with a total of 4796 cases were included to explore the association between PKM2 and overall survival (OS) or disease-free survival (DFS)/ progression-free survival (PFS)/ recurrent-free survival (RFS) in subjects with solid cancer...
November 29, 2016: Oncotarget
https://www.readbyqxmd.com/read/27911852/long-non-coding-rna-xist-promotes-cell-growth-and-invasion-through-regulating-mir-497-macc1-axis-in-gastric-cancer
#14
Lei Ma, Yongjian Zhou, Xiaojun Luo, Hai Gao, Xubin Deng, Yingjie Jiang
Abnormal expression of long non-coding RNA (lncRNAs) often contributes to unrestricted growth and invasion of cancer cells. LncRNA XIST expression is up-regulated in several cancers, however, its modulatory mechanism in gastric cancer (GC) has not been elucidated. In the present study, we found that XIST expression was significantly increased in GC tissues and cell lines. LncRNA XIST promoted cell cycle progression from the G1 phase to the S phase and protected cells from apoptosis, which contributed to GC cell growth...
November 28, 2016: Oncotarget
https://www.readbyqxmd.com/read/27911104/upregulation-of-t-cell-immunoglobulin-and-mucin-domain-containing-3-tim-3-in-monocytes-macrophages-associates-with-gastric-cancer-progression
#15
Zhenxin Wang, Ni Yin, Zixiang Zhang, Yi Zhang, Guangbo Zhang, Weichang Chen
T-cell immunoglobulin and mucin-domain containing-3 (Tim-3) is an important immune regulatory molecule in cancer immune system. However, expression and function of Tim-3 in monocytes/macrophages in cancer progression mainly remain unclear. In this study, we analyzed Tim-3 levels in peripheral blood mononuclear cells (PBMCs) from 62 gastric cancer patients and 45 healthy controls using flow cytometry and then associated Tim-3 levels with clinical pathological data from patients. We found Tim-3 level was significantly upregulated in monocytes from gastric cancer patients compared with those from healthy controls, and that upregulated Tim-3 levels associated with depth of tumor invasion and tumor lymph node metastasis and advanced clinical stages of gastric cancer patients...
December 2, 2016: Immunological Investigations
https://www.readbyqxmd.com/read/27911065/-gastric-tube-esophagoplasty-using-the-retroesternal-route-in-children
#16
L García Martínez, J A Molino Gahete, S Redecillas Ferreiro, E Bordón Cabrera, J Bueno Recio, G Guillén Burrieza, C Giné Prades, A Lara Valtueña, J Lloret Roca
INTRODUCTION: Esophageal replacement is a surgical alternative once native esophagus can't be preserved. Different organs and routes for the replacement have been described, being the retroesternal route the least used. The aim is to present our results using gastric tube esophagoplasty with a retroesternal approach. PATIENTS AND METHODS: We performed a retrospective and descriptive study of 11 patients operated from 2000 to 2015. Median age at surgery was 2.2 years (5 months-9 years) and median weight was 11...
January 25, 2016: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
https://www.readbyqxmd.com/read/27910777/gastric-adenocarcinoma-biomarker-expression-profiles-and-their-prognostic-value
#17
Serkan Senol, Abdullah Aydin, Duygu Kosemetin, Dilek Ece, Ibrahim Akalin, Hasan Abuoglu, Esra Akdeniz Duran, Dincer Aydin, Burcak Erkol
Expression levels of several molecules implicated in carcinogenesis were examined by immunohistochemical staining, and the prognostic significance of their expression levels in gastric adenocarcinoma (GA) was evaluated. A total of 115 GA and 20 control gastric tissue samples were evaluated by immunohistochemistry using 33 antibodies targeting molecules known to play a part in the development of various tumors. Overexpression of carbonic anhydrase IX (CAIX) and loss of AT-rich interactive domain-containing protein 1A (ARID1A), aldehyde dehydrogenase 1 (ALDH1), and CD44 expression in GA patients were significantly correlated with lymph node (LN) metastasis, advanced tumor stage, and poor prognosis...
2016: Journal of Environmental Pathology, Toxicology and Oncology
https://www.readbyqxmd.com/read/27909998/bilateral-transcutaneous-electroacupuncture-for-overdilation-of-gastric-tube-after-esophagectomy-report-of-a-case
#18
Zhi Wang, Jin-Cheng Liu, Qi-Liang Chen, Jun-Xiao Li, Qian-Hong Wu, Qiong Wu, Kang Li, Cheng-Xue Dang
No abstract text is available yet for this article.
December 1, 2016: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/27909899/obesity-and-risk-of-cancer-an-introductory-overview
#19
Tobias Pischon, Katharina Nimptsch
The prevalence of obesity has increased substantially in the past in almost all countries of the world, and a further increase is expected for the future. Besides the well-established effects on type 2 diabetes and cardiovascular disease, there is convincing evidence today that obesity also increases the risk of several types of cancer, including colorectal cancer, postmenopausal breast cancer, endometrial cancer, renal cell carcinoma, esophageal adenocarcinoma, pancreatic cancer, and liver cancer. Obesity probably also increases the risk of ovarian cancer, advanced prostate cancer, gallbladder cancer, and gastric cardia cancer...
2016: Recent Results in Cancer Research
https://www.readbyqxmd.com/read/27909884/differential-role-of-wnt-signaling-and-base-excision-repair-pathways-in-gastric-adenocarcinoma-aggressiveness
#20
Alireza Korourian, Raheleh Roudi, Ahmad Shariftabrizi, Elham Kalantari, Kambiz Sotoodeh, Zahra Madjd
Aberrant activation of Wnt and base excision repair (BER) signaling pathways are implicated in tumor progression and chemotherapy resistance in gastric adenocarcinoma. This study was conducted to clarify the role of E2F6 and RhoA, components of the Wnt signaling pathway, and SMUG1, a component of the BER pathway in gastric adenocarcinoma. Expression levels and clinicopathological significance of three biomarkers, namely E2F6, RhoA, and SMUG1, as potential signaling molecules involved in tumorigenesis and aggressive behavior, were examined using tissue microarray...
December 1, 2016: Clinical and Experimental Medicine
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