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barrett's epithelium

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https://www.readbyqxmd.com/read/28212604/high-expression-of-claudin-2-in-esophageal-carcinoma-and-precancerous-lesions-is-significantly-associated-with-the-bile-salt-receptors-vdr-and-tgr5
#1
Sohaib Abu-Farsakh, Tongtong Wu, Amy Lalonde, Jun Sun, Zhongren Zhou
BACKGROUND: Claudins are a family of integral membrane proteins and are components of tight junctions (TJs). Many TJ proteins are known to tighten the cell structure and maintain a barrier. Claudin-2 forms gated paracellular channels and allows sodium ions and other small positively charged ions to cross between adjacent cells. Recently, we found that vitamin D receptor (VDR) enhanced Claudin-2 expression in colon and that bile salt receptors VDR and Takeda G-protein coupled receptor5 (TGR5) were highly expressed in esophageal adenocarcinoma (EAC) and precancerous lesions...
February 17, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28212575/upregulation-of-mucin-glycoprotein-muc1-in-the-progression-to-esophageal-adenocarcinoma-and-therapeutic-potential-with-a-targeted-photoactive-antibody-drug-conjugate
#2
Mohammed Adil Butt, Hayley Pye, Rehan J Haidry, Dahmane Oukrif, Saif-U-Rehman Khan, Ignazio Puccio, Michael Gandy, Halla W Reinert, Ellie Bloom, Mohammed Rashid, Gokhan Yahioglu, Mahendra P Deonarain, Rifat Hamoudi, Manuel Rodriguez-Justo, Marco R Novelli, Laurence B Lovat
BACKGROUND: Mucin glycoprotein 1 (MUC1) is a glycosylated transmembrane protein on epithelial cells. We investigate MUC1 as a therapeutic target in Barrett's epithelium (BE) and esophageal adenocarcinoma (EA) and provide proof of concept for a light based therapy targeting MUC1. RESULTS: MUC1 was present in 21% and 30% of significantly enriched pathways comparing BE and EA to squamous epithelium respectively. MUC1 gene expression was x2.3 and x2.2 higher in BE (p=<0...
February 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28206968/intratumoral-lactate-metabolism-in-barrett-s-esophagus-and-adenocarcinoma
#3
Heikki Huhta, Olli Helminen, Sami Palomäki, Joonas H Kauppila, Juha Saarnio, Petri P Lehenkari, Tuomo J Karttunen
BACKGROUND: Monocarboxylate transporters (MCTs) are cell membrane proteins which transport pyruvate, lactate and ketone bodies across the plasma membrane. MCTs are activated in various cancers, but their expression in esophageal adenocarcinoma is not known. The present study was conducted to elucidate the expression of MCTs in esophageal adenocarcinoma and its precursor lesions. RESULTS: Cytoplasmic MCT1, MCT4 and MTCO1 expression linearly increased from normal epithelium to Barrett's mucosa to dysplasia and cancer...
February 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28187035/hepatocyte-antigen-expression-in-barrett-esophagus-and-associated-neoplasia
#4
Sejal S Shah, Vishal S Chandan
Hepatocyte antigen or hepatocyte paraffin 1 (Hep Par 1) is widely used as a diagnostic immunomarker for hepatocellular carcinoma. It has also been identified as a rate-limiting enzyme of the urea cycle, carbamoyl phosphate synthetase 1. Hep Par 1 has been detected in non-neoplastic small intestinal epithelium, but its expression in Barrett esophagus and its related neoplasia has not been well investigated. We immunohistochemically evaluated expression of Hep Par 1 on 75 cases of Barrett esophagus (25 cases without dysplasia, 16 cases with low-grade dysplasia, 25 cases with high-grade dysplasia, and 9 cases with intramucosal adenocarcinoma) on endoscopic biopsies and endoscopic mucosal resections...
February 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28174399/-treatment-strategy-for-esophagogastric-junction-carcinoma-highly-controversial-topic-in-the-upper-gastrointestinal-malignancy
#5
Hiroharu Yamashita, Yasuyuki Seto
Among the 3 subtypes of adenocarcinoma of the esophagogastric junction (AEG), Siewert type I is basically consistent with esophageal adenocarcinoma arising from the Barrett epithelium( Barrett's adenocarcinoma), and type III is gastric carcinoma with esophageal invasion over the esophagogastric junction(EGJ). It is generally endorsed that type I is treated as an esophageal carcinoma, and type III as a gastric carcinoma. Siewert type II carcinoma, located just at the borderline between the esophagus and the stomach, has been a highly controversial topic regarding surgical approach, extent of esophagogastric resection and lymphadenectomy, type of reconstruction, and even the staging system...
January 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28137494/characteristics-associated-with-clinical-severity-and-inflammatory-phenotype-of-naturally-occurring-virus-induced-exacerbations-of-asthma-in-adults
#6
Asger Bjerregaard, Ingrid A Laing, Nadia Poulsen, Vibeke Backer, Asger Sverrild, Markus Fally, Siew-Kim Khoo, Lucy Barrett, Svetlana Baltic, Philip J Thompson, Glenys Chidlow, Chisha Sikazwe, David W Smith, Yury A Bochkov, Peter Le Souëf, Celeste Porsbjerg
BACKGROUND: In experimental studies viral infections have been shown to induce type 2 inflammation in asthmatics, but whether this is a feature of naturally occurring virus-induced asthma exacerbations is unknown. Thymic stromal lymphopoietin (TSLP) released from the airway epithelium in response to damage, has been suggested as a link between viral infection and type 2 inflammation, but the role of TSLP in asthma exacerbations is unknown. OBJECTIVE: To assess whether type 2 inflammation, as measured by sputum eosinophils and fractional exhaled nitric oxide (FeNO), is a feature of naturally occurring virus-induced exacerbations of asthma and whether TSLP is associated with this type 2 inflammation...
February 2017: Respiratory Medicine
https://www.readbyqxmd.com/read/28122386/endoscopic-management-of-barrett-s-esophagus-european-society-of-gastrointestinal-endoscopy-esge-position-statement
#7
Bas Weusten, Raf Bisschops, Emanuel Coron, Mário Dinis-Ribeiro, Jean-Marc Dumonceau, José-Miguel Esteban, Cesare Hassan, Oliver Pech, Alessandro Repici, Jacques Bergman, Massimiliano di Pietro
Current practices for the management of Barrett's esophagus (BE) vary across Europe, as several national European guidelines exist. This Position Statement from the European Society of Gastrointestinal Endoscopy (ESGE) is an attempt to homogenize recommendations and, hence, patient management according to the best scientific evidence and other considerations (e.g. health policy). A Working Group developed consensus statements, using the existing national guidelines as a starting point and considering new evidence in the literature...
February 2017: Endoscopy
https://www.readbyqxmd.com/read/28062361/redox-signaling-in-the-gastrointestinal-tract
#8
REVIEW
Salvador Pérez, Raquel Taléns-Visconti, Sergio Rius-Pérez, Isabela Finamor, Juan Sastre
Redox signaling regulates physiological self-renewal, proliferation, migration and differentiation in gastrointestinal epithelium by modulating Wnt/β-catenin and Notch signaling pathways mainly through NADPH oxidases (NOXs). In the intestine, intracellular and extracellular thiol redox status modulates the proliferative potential of epithelial cells. Furthermore, commensal bacteria contribute to intestine epithelial homeostasis through NOX1- and dual oxidase 2-derived reactive oxygen species (ROS). The loss of redox homeostasis is involved in the pathogenesis and development of a wide diversity of gastrointestinal disorders, such as Barrett's esophagus, esophageal adenocarcinoma, peptic ulcer, gastric cancer, ischemic intestinal injury, celiac disease, inflammatory bowel disease and colorectal cancer...
January 3, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28058012/evolving-management-of-metaplasia-and-dysplasia-in-barrett-s-epithelium
#9
REVIEW
Richard P T Evans, Moustafa Mabrouk Mourad, Simon G Fisher, Simon R Bramhall
Oesophageal cancer affects more than 450000 people worldwide and despite continued medical advancements the incidence of oesophageal cancer is increasing. Oesophageal cancer has a 5 year survival of 15%-25% and now globally attempts are made to more aggressively diagnose and treat Barrett's oesophagus the known precursor to invasive disease. Currently diagnosis the of Barrett's oesophagus is predominantly made after endoscopic visualisation and histopathological confirmation. Minimally invasive techniques are being developed to improve the viability of screening programs...
December 21, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28042232/progression-of-barrett-s-esophagus-toward-esophageal-adenocarcinoma-an-overview
#10
REVIEW
Nele Schoofs, Raf Bisschops, Hans Prenen
In Barrett's esophagus, normal squamous epithelium is replaced by a metaplastic columnar epithelium as a consequence of chronic gastroesophageal reflux disease. There is a strong association with esophageal adenocarcinoma. In view of the increasing incidence of esophageal adenocarcinoma in the western world, it is important that more attention be paid to the progression of Barrett's esophagus toward esophageal adenocarcinoma. Recently, several molecular factors have been identified that contribute to the sequence towards adenocarcinoma...
2017: Annals of Gastroenterology: Quarterly Publication of the Hellenic Society of Gastroenterology
https://www.readbyqxmd.com/read/28012816/-small-white-sign-in-barrett-s-esophageal-cancer-under-the-squamous-epithelium
#11
Rintaro Hashimoto, Dai Hirasawa, Akimichi Chonan, Hajime Yamaoka, Masato Nakahori
No abstract text is available yet for this article.
December 21, 2016: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27995191/non-radical-stepwise-complete-endoscopic-resection-of-barrett-s-epithelium-in-short-segment-barrett-s-esophagus-has-a-low-stricture-rate
#12
Andreas Koutsoumpas, Lai Mun Wang, Adam A Bailey, Richard Gillies, Robert Marshall, Michael Booth, Bruno Sgromo, Nick Maynard, Barbara Braden
Background and aims: Radical endoscopic excision of Barrett's epithelium performing 4 - 6 endoscopic resections during the same endoscopic session results in complete Barrett's eradication but has a high stricture rate (40 - 80 %). Therefore radiofrequency ablation is preferred after endoscopic mucosal resection (EMR) of visible nodules. We investigated the clinical outcome of non-radical, stepwise endoscopic mucosal resection with a maximum of two endoscopic resections per endoscopic session. Methods: We analysed our prospectively maintained database of patients undergoing esophageal EMR for early neoplasia in Barrett's esophagus from 2009 to 2014...
December 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27875772/hnf4%C3%AE-is-a-key-gene-that-can-generate-columnar-metaplasia-in-oesophageal-epithelium
#13
Benjamin J Colleypriest, Zoë D Burke, Leonard P Griffiths, Yu Chen, Wei-Yuan Yu, Ramiro Jover, Michael Bock, Leigh Biddlestone, Jonathan M Quinlan, Stephen G Ward, J Mark Farrant, Jonathan M W Slack, David Tosh
Barrett's metaplasia is the only known morphological precursor to oesophageal adenocarcinoma and is characterized by replacement of stratified squamous epithelium by columnar epithelium. The cell of origin is uncertain and the molecular mechanisms responsible for the change in cellular phenotype are poorly understood. We therefore explored the role of two transcription factors, Cdx2 and HNF4α in the conversion using primary organ cultures. Biopsy samples from cases of human Barrett's metaplasia were analysed for the presence of CDX2 and HNF4α...
January 2017: Differentiation; Research in Biological Diversity
https://www.readbyqxmd.com/read/27874941/gastroesophageal-reflux-disease-are-we-acting-in-the-best-interest-of-our-patients
#14
G D Tebala
Oesophageal adenocarcinoma is strictly related to gastroesophageal reflux and cylindrical metaplasia of the epithelium of the distal esophagus (Barrett's esophagus) due to chronic inflammation. Worldwide incidence of oesophageal adenocarcinoma is rising despite the availability of precise international guidelines for the treatment of gastroesophageal reflux disease and the increasing use of proton-pump inhibitors (PPIs). While PPIs can control GERD symptoms in a significant amount of cases, still a large number of patients progress to Barrett's esophagus and adenocarcinoma...
November 2016: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/27771439/quantitative-extracellular-matrix-proteomics-to-study-mammary-and-liver-tissue-microenvironments
#15
Erica T Goddard, Ryan C Hill, Alexander Barrett, Courtney Betts, Qiuchen Guo, Ori Maller, Virginia F Borges, Kirk C Hansen, Pepper Schedin
Normal epithelium exists within a dynamic extracellular matrix (ECM) that is tuned to regulate tissue specific epithelial cell function. As such, ECM contributes to tissue homeostasis, differentiation, and disease, including cancer. Though it is now recognized that the functional unit of normal and transformed epithelium is the epithelial cell and its adjacent ECM, we lack a basic understanding of tissue-specific ECM composition and abundance, as well as how physiologic changes in ECM impact cancer risk and outcomes...
December 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27766003/dynamics-of-sox2-and-cdx2-expression-in-barrett-s-mucosa
#16
Rita Barros, Daniela Pereira, Catarina Callé, Vânia Camilo, Ana Isabel Cunha, Leonor David, Raquel Almeida, António Dias-Pereira, Paula Chaves
Barrett's esophagus (BE) is the replacement of the normal esophageal squamous epithelium by a columnar lining epithelium. It is a premalignant condition for the development of adenocarcinoma of the esophagus and esophagogastric junction. BE is associated with gastroesophageal reflux which might change the expression profile of key transcription factors involved in the establishment of tissue differentiation, namely, SOX2 (associated with esophageal and gastric differentiation) and CDX2 (associated with intestinal differentiation)...
2016: Disease Markers
https://www.readbyqxmd.com/read/27765341/unusual-presentation-of-squamous-cell-carcinoma-of-the-maxilla-in-an-8-year-old-child
#17
Marco A O Magalhaes, Gino R Somers, Paula Sikorski, Vito Forte, Moustafa Abouzgia, Edward Barrett, Grace Bradley
Oral squamous cell carcinoma (OSCC) is extremely rare in patients younger than 20 years of age. We present here a case of OSCC of the maxillary alveolar ridge in an otherwise healthy 8-year-old patient. The clinicohistologic presentation was not typical for mucosal SCC, and the possibility of an intrabony origin from the odontogenic epithelium was considered. The patient was treated with surgical resection, and treatment decisions were made with consideration of the need for eradication of tumor as well as tissue preservation to allow normal growth and development...
November 2016: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
https://www.readbyqxmd.com/read/27757487/-barrett-s-esophagus
#18
J Labenz
Barrett's esophagus is an endoscopically visible metaplasia of the columnar epithelium in the esophagus with histological detection of a specialized intestinal metaplasia. The circumferential and longitudinal extent are described endoscopically using the Prague classification. Barrett's esophagus mostly occurs as the result of gastroesophageal reflux disease. The risk of developing esophageal adenocarcinoma is increased but the absolute risk is low with 0.10-0.15 % per year. According to guideline recommendations, screening for Barrett's esophagus as well as endoscopic and biopsy surveillance should be limited to high risk groups...
November 2016: Der Internist
https://www.readbyqxmd.com/read/27747281/first-reports-of-esophageal-adenocarcinoma-with-white-globe-appearance-in-japanese-and-caucasian-patients
#19
Yusuke Tonai, Ryu Ishihara, Yasushi Yamasaki, Takashi Kanesaka, Sachiko Yamamoto, Tomofumi Akasaka, Noboru Hanaoka, Yoji Takeuchi, Koji Higashino, Noriya Uedo, Yasuhiko Tomita, Hiroyasu Iishi
Background and study aims: Better endoscopic diagnosis in case of Barrett's esophagus is still needed. White globe appearance (WGA) is a novel endoscopic marker for gastric adenocarcinoma, with high sensitivity for differentiating between gastric cancer/high-grade dysplasia and other lesions. We report 2 cases of esophageal adenocarcinoma with WGA. In Case 1, esophagogastroduodenoscopy (EGD) revealed a 10-mm esophageal adenocarcinoma in a 48-year-old Japanese woman with short-segment Barrett's esophagus. A small (< 1 mm) white globular lesion, typical of WGA, was observed under the epithelium by magnifying narrow-band imaging...
October 2016: Endoscopy International Open
https://www.readbyqxmd.com/read/27731371/transcriptional-regulation-by-normal-epithelium-of-premalignant-to-malignant-progression-in-barrett-s-esophagus
#20
Jia Zeng, Laimonas Kelbauskas, Aida Rezaie, Kristen Lee, Benjamin Ueberroth, Weimin Gao, Dmitry Derkach, Thai Tran, Dean Smith, Kimberly J Bussey, Deirdre R Meldrum
In carcinogenesis, intercellular interactions within and between cell types are critical but remain poorly understood. We present a study on intercellular interactions between normal and premalignant epithelial cells and their functional relevance in the context of premalignant to malignant progression in Barrett's esophagus. Using whole transcriptome profiling we found that in the presence of normal epithelial cells, dysplastic cells but not normal cells, exhibit marked down-regulation of a number of key signaling pathways, including the transforming growth factor beta (TGFβ) and epithelial growth factor (EGF)...
October 12, 2016: Scientific Reports
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