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https://www.readbyqxmd.com/read/28627413/modeling-esophagitis-using-human-three-dimensional-organotypic-culture-system
#1
Dorottya Laczkó, Fang Wang, F Bradley Johnson, Nirag Jhala, András Rosztóczy, Gregory G Ginsberg, Gary W Falk, Anil K Rustgi, John P Lynch
Esophagitis, whether caused by acid reflux, allergic responses, graft-versus-host disease, drugs, or infections, is a common condition of the gastrointestinal tract affecting nearly 20% of the US population. The instigating agent typically triggers an inflammatory response. The resulting inflammation is a risk factor for the development of esophageal strictures, Barrett esophagus, and esophageal adenocarcinoma. Research into the pathophysiology of these conditions has been limited by the availability of animal and human model systems...
June 13, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28593187/the-esophageal-squamous-epithelial-cell-still-a-reasonable-candidate-for-the%C3%A2-barrett-s-esophagus-cell-of%C3%A2-origin
#2
David H Wang
Barrett's esophagus is the metaplastic change of the squamous epithelium lining the distal esophagus into an intestinalized columnar epithelium that predisposes to esophageal adenocarcinoma development. The cell that gives rise to Barrett's esophagus has not been identified definitively, although several sources for the Barrett's esophagus cell of origin have been postulated. One possible source is a fully differentiated squamous epithelial cell or a squamous epithelial progenitor or stem cell native to the esophagus that, through molecular reprogramming, either transdifferentiation or transcommitment, could give rise to an intestinalized columnar cell...
July 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28593186/origin-of-barrett-s-epithelium-esophageal-submucosal-glands
#3
Katherine S Garman
The origin of the progenitor cell for Barrett's esophagus remains a major unsolved mystery. Understanding the source of this progenitor may improve strategies to prevent the development of esophageal adenocarcinoma. Esophageal submucosal glands (ESMGs) and ducts may serve as a potential source of progenitor cells that respond to esophageal injury. Through the use of human histologic and molecular analysis, ESMGs and ducts have been described in physical continuity with areas of columnar esophagus, and shared mutations have been described between ESMG ducts and Barrett's esophagus...
July 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28572084/ductular-and-proliferative-response-of-esophageal-submucosal-glands-in-a-porcine-model-of-esophageal-injury-and-repair
#4
Leandi Krüger, Liara M Gonzalez, Tiffany A Pridgen, Shannon J McCall, Richard von Furstenberg, Ivan Harnden, Gwendolyn E Carnighan, Abigail M Cox, Anthony T Blikslager, Katherine Schuver Garman
Esophageal injury is a risk factor for diseases such as Barrett's Esophagus (BE) and Esophageal Adenocarcinoma. In order to improve understanding of signaling pathways associated with both normal and abnormal repair, animal models are needed. Traditional rodent models of esophageal repair are limited by the absence of esophageal submucosal glands (ESMGs), which are present in human esophagus. Previously, we identified acinar ductal metaplasia in human ESMGs in association with both esophageal injury and cancer...
June 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28571591/dietary-inflammatory-index-and-risk-of-reflux-oesophagitis-barrett-s-oesophagus-and-oesophageal-adenocarcinoma-a-population-based-case-control-study
#5
Nitin Shivappa, James R Hebert, Lesley A Anderson, Martha J Shrubsole, Liam J Murray, Lauren B Getty, Helen G Coleman
The dietary inflammatory index (DIITM) is a novel composite score based on a range of nutrients and foods known to be associated with inflammation. DII scores have been linked to the risk of a number of cancers, including oesophageal squamous cell cancer and oesophageal adenocarcinoma (OAC). Given that OAC stems from acid reflux and that the oesophageal epithelium undergoes a metaplasia-dysplasia transition from the resulting inflammation, it is plausible that a high DII score (indicating a pro-inflammatory diet) may exacerbate risk of OAC and its precursor conditions...
June 2, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28533674/impact-of-gastroesophageal-reflux-control-through-tailored-proton-pump-inhibition-therapy-or-fundoplication-in-patients-with-barrett-s-esophagus
#6
Francisco Baldaque-Silva, Michael Vieth, Mumen Debel, Bengt Håkanson, Anders Thorell, Nuno Lunet, Huan Song, Miguel Mascarenhas-Saraiva, Gisela Pereira, Lars Lundell, Hanns-Ulrich Marschall
AIM: To determine the impact of upwards titration of proton pump inhibition (PPI) on acid reflux, symptom scores and histology, compared to clinically successful fundoplication. METHODS: Two cohorts of long-segment Barrett's esophagus (BE) patients were studied. In group 1 (n = 24), increasing doses of PPI were administered in 8-wk intervals until acid reflux normalization. At each assessment, ambulatory 24 h pH recording, endoscopy with biopsies and symptom scoring (by a gastroesophageal reflux disease health related quality of life questionnaire, GERD/HRLQ) were performed...
May 7, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28502210/-esophageal-complications-of-gastroesophageal-reflux-disease-consequences-or-defensive-reactions
#7
Örs Péter Horváth, Laura Bognár, András Papp, András Vereczkei
Gastroesophageal reflux disease affects more than 10% of the adult population. Most patients can be effectively treated with lifestyle changes and adequate acid-reducing therapy. However, about 10% of the patients remain symptomatic despite treatment and severe complications may develop. Interestingly, some of these complications seem to be a sort of defensive mechanism that may either alleviate the patient's symptoms or prevent developing further complications. In Barrett's esophagus, which can be unambigously considered as a complication of gastroesophageal reflux disease, reflux symptoms ruining the quality of life may significantly improve, since the metaplastic Barrett epithelium is much more resistent to gastric acid, than the normal epithelial lining of the esophagus...
May 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28475729/ceacam-6-a-novel-marker-for-the-diagnosis-of-barrett-s-esophagus
#8
N Sharma, S Srivastava, F Kern, W Xian, K G Yeoh, T Ming, F McKeon, K Y Ho
Barrett's esophagus (BE) is a premalignant condition associated with the development of esophageal adenocarcinoma (EAC). Despite the low risk of progression to EAC, evidence highlights the notably poor survival rates of this malignancy. The mainstay form of diagnosis of BE is endoscopy and biopsy sampling. However, research emphasizes limitations with regards to the histological detection of BE and associated dysplasia. The aim of this study is to evaluate the clinical significance of CEACAM6 as a potential biomarker for the diagnosis of BE and beyond...
July 1, 2017: Diseases of the Esophagus: Official Journal of the International Society for Diseases of the Esophagus
https://www.readbyqxmd.com/read/28451845/reflux-esophagitis-and-its-role-in-the-pathogenesis-of-barrett-s-metaplasia
#9
REVIEW
Rhonda Frances Souza
Reflux esophagitis damages the squamous epithelium that normally lines the esophagus, and promotes replacement of the damaged squamous lining by the intestinal metaplasia of Barrett's esophagus, the precursor of esophageal adenocarcinoma. Therefore, to prevent the development of Barrett's metaplasia and esophageal adenocarcinoma, the pathogenesis of reflux esophagitis must be understood. We have reported that reflux esophagitis, both in a rat model and in humans, develops as a cytokine-mediated inflammatory injury (i...
April 27, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28442495/aspirin-prevents-nf-%C3%AE%C2%BAb-activation-and-cdx2-expression-stimulated-by-acid-and-bile-salts-in-oesophageal-squamous-cells-of-patients-with-barrett-s-oesophagus
#10
Xiaofang Huo, Xi Zhang, Chunhua Yu, Edaire Cheng, Qiuyang Zhang, Kerry B Dunbar, Thai H Pham, John P Lynch, David H Wang, Robert S Bresalier, Stuart J Spechler, Rhonda F Souza
OBJECTIVE: In previous studies using oesophageal squamous cells from patients with Barrett's oesophagus (normal oesophageal squamous (NES)-B cells) and from patients without Barrett's oesophagus (NES-G cells), we showed that acid and bile salts induced caudal-related homeobox transcription factor 2 (CDX2) expression only in NES-B cells. CDX2, a transcription factor required to form intestinal epithelium, is a target of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) signalling, which can be inhibited by aspirin...
April 25, 2017: Gut
https://www.readbyqxmd.com/read/28441152/cryoablation-in-the-management-of-barrett-s-esophagus
#11
Anouk Overwater, Bas L A M Weusten
PURPOSE OF REVIEW: Providing an overview on types of cryotherapy for esophageal application and their role in the management of Barrett's esophagus. RECENT FINDINGS: Recent studies have involved multiple types of cryotherapy including cryospray techniques that use either liquid nitrogen or carbon dioxide as the cryogenic fluid, and the CryoBalloon focal ablation device that uses nitrous oxide. Overall, studies report cryotherapy to be safe and effective in eradicating Barrett's epithelium...
July 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28425652/endoscopic-findings-of-esophagogastric-junction-in-children
#12
Yoshiko Nakayama, Shinobu Ida
Esophagogastric landmarks are recognizable in the same way both in children and in adults, and palisade-shaped vessels can be observed at the distal position of esophageal mucosa, even in infants. Few studies have been done in respect to Barrett's esophagus (BE) in children. Incidence of endoscopically suspected BE among all children undergoing esophagogastroduodenoscopy (EGD) is approximately 0.25-1.4%, but can be up to 9.7% in patients with gastroesophageal reflux disease (GERD). Some data suggest that BE is an acquired disorder and point to the possibility of a congenital component in combination with severe mucosal injury...
April 2017: Digestive Endoscopy: Official Journal of the Japan Gastroenterological Endoscopy Society
https://www.readbyqxmd.com/read/28404744/the-role-of-cb1-in-intestinal-permeability-and-inflammation
#13
Mustafa A Karwad, Daniel G Couch, Elena Theophilidou, Sarir Sarmad, David A Barrett, Michael Larvin, Karen L Wright, Jonathan N Lund, Saoirse E O'Sullivan
The endocannabinoid system has previously been shown to play a role in the permeability and inflammatory response of the human gut. The goal of our study was to determine the effects of endogenous anandamide (AEA) and 2-arachidonoyl glycerol (2-AG) on the permeability and inflammatory response of intestinal epithelium under normal, inflammatory, and hypoxic conditions. Human intestinal mucosa was modeled using Caco-2 cells. Human tissue was collected from planned colorectal resections. Accumulation of AEA and 2-AG was achieved by inhibiting their metabolizing enzymes URB597 (a fatty acid amide hydrolase inhibitor) and JZL184 (a monoacylglycerol lipase inhibitor)...
April 12, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28370911/esophageal-sensitivity-to-acid-in-patients-with-barrett-s-esophagus-is-not-related-to-preserved-esophageal-mucosal-integrity
#14
P W Weijenborg, A J P M Smout, K K Krishnadath, J G H M Bergman, J Verheij, A J Bredenoord
BACKGROUND: Patients with Barrett's esophagus (BE) usually have severe gastroesophageal reflux. However, they often have surprisingly few reflux symptoms. We hypothesized that BE patients are less sensitive to acid than gastroesophageal reflux disease (GERD) patients without Barrett and that this is due to an unusual preservation of mucosal integrity of the squamous epithelium prohibiting transepithelial acid diffusion. METHODS: We prospectively analyzed esophageal sensitivity and esophageal mucosal integrity in GERD patients with and without BE and healthy subjects...
March 30, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/28336546/barrett-s-metaplasia-develops-from-cellular-reprograming-of-esophageal-squamous-epithelium-due-to-gastroesophageal-reflux
#15
Carlos D Minacapelli, Manisha Bajpai, Xin Geng, Christina L Cheng, Abhishek A Chouthai, Rhonda Souza, Stuart J Spechler, Kiron M Das
Gastroesophageal reflux disease (GERD) clinically predisposes to columnar Barrett's metaplasia (BM) in the distal esophagus. We demonstrate evidence supporting the cellular origin of BM from reprograming or transcommitment of resident normal esophageal squamous (NES) epithelial cells in response to acid and bile (A + B) exposure using an in vitro cell culture model. The hTERT-immortalized NES cell line NES-B10T was exposed 5 min/day to an A + B mixture for 30 wk. Morphological changes, mRNA, and protein expression levels for the inflammatory marker cyclooxygenase-2; the lineage-determining transcription factors TAp63 (squamous), CDX2, and SOX9 (both columnar); and the columnar lineage markers Villin, Muc-2, CK8, and mAb Das-1 (incomplete phenotype of intestinal metaplasia) were assessed every 10 wk...
June 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28315927/hla-dr-expression-in-tumor-epithelium-is-an-independent-prognostic-indicator-in-esophageal-adenocarcinoma-patients
#16
Margaret R Dunne, Adriana J Michielsen, Katie E O'Sullivan, Mary Clare Cathcart, Ronan Feighery, Brendan Doyle, Jenny A Watson, Naoimh J O'Farrell, Narayanasamy Ravi, Elaine Kay, John V Reynolds, Elizabeth J Ryan, Jacintha O'Sullivan
Esophageal adenocarcinoma (EAC) is an aggressive cancer with poor prognosis, and incidence is increasing rapidly in the Western world. Measurement of immune markers has been shown to have prognostic significance in a growing number of cancers, but whether this is true for EAC has yet to be evaluated. This study aimed to characterize HLA-DR expression in the esophagus across the inflammation to cancer progression sequence and to assess the prognostic significance of HLA-DR expression in EAC. Tissue microarrays (TMA) were constructed from esophageal tissue taken from patients at different stages in the cancer progression sequence; normal, esophagitis, Barrett's esophagus (BE), low- and high-grade dysplasia (LGD, HGD) and EAC...
March 18, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28258457/from-heartburn-to-barrett-s-esophagus-and-beyond
#17
Francisco Schlottmann, Marco G Patti, Nicholas J Shaheen
BACKGROUND: Gastroesophageal reflux disease (GERD) affects an estimated 20% of the population in the USA, and its prevalence is increasing worldwide. About 10-15% of patients with GERD will develop Barrett's esophagus (BE). AIMS: The aims of this study were to review the available evidence of the pathophysiology of BE and the role of anti-reflux surgery in the treatment of this disease. RESULTS: The transformation of the squamous epithelium into columnar epithelium with goblet cells is due to the chronic injury produced by repeated reflux episodes...
July 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28223834/bile-salt-receptor-tgr5-is-highly-expressed-in-esophageal-adenocarcinoma-and-precancerous-lesions-with-significantly-worse-overall-survival-and-gender-differences
#18
Chunhong Pang, Amy LaLonde, Tony E Godfrey, Jianwen Que, Jun Sun, Tong Tong Wu, Zhongren Zhou
Bile acid reflux in the esophagus plays an important role in the carcinogenesis of esophageal adenocarcinoma (EAC). The G-protein coupled bile acid receptor (TGR5) has been associated with the development of gastrointestinal cancer. However, little is known regarding the role of TGR5 in esophageal carcinoma and precancerous lesions. We analyzed genomic DNA from 116 EACs for copy number aberrations via Affymetrix SNP6.0 microarrays. The TGR5 gene locus was amplified in 12.7% (14/116) of the EACs. The TGR5 protein expression was also assessed using immunohistochemistry from tissue microarrays, including Barrett's esophagus (BE), low-(LGD) and high-grade dysplasia (HGD), columnar cell metaplasia (CM), squamous epithelium (SE), EAC and squamous cell carcinoma...
2017: Clinical and Experimental Gastroenterology
https://www.readbyqxmd.com/read/28216140/expression-profiles-of-cancer-stem-cell-markers-cd133-cd44-musashi-1-and-epcam-in-the-cardiac-mucosa-barrett-s-esophagus-early-esophageal-adenocarcinoma-advanced-esophageal-adenocarcinoma-sequence
#19
Anna Mokrowiecka, Lothar Veits, Christina Falkeis, Jacek Musial, Radzislaw Kordek, Mariusz Lochowski, Jozef Kozak, Agnieszka Wierzchniewska-Lawska, Michael Vieth, Ewa Malecka-Panas
INTRODUCTION: Barrett's esophagus (BE), which develops as a result of gastroesophageal reflux disease, is a preneoplastic condition for esophageal adenocarcinoma (EAC). A new hypothesis suggests that cancer is a disease of stem cells, however, their expression and pathways in BE - EAC sequence are not fully elucidated yet. AIMS: We used a panel of putative cancer stem cells markers to identify stem cells in consecutive steps of BE-related cancer progression. METHODS: Immunohistochemistry was performed on formalin-fixed, paraffin-embedded blocks from 58 patients with normal cardiac mucosa (n=5), BE (n=14), early EAC (pT1) from mucosal resection (n=17) and advanced EAC (pT1-T4) from postoperative specimens (n=22)...
March 2017: Pathology, Research and Practice
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
#20
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
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