Barrett's oesophagus or columnar epithelium-lined oesophagus is a condition due to chronic gastro-oesophageal reflux. In addition to acid-peptic reflux, reflux of duodenal contents may have a role in its aetiology. The clinical importance of Barrett's oesophagus is the increased risk for development of oesophageal adenocarcinoma. Measures to prevent cancer development have so far been limited to regular screening and early oesophagectomy in the case of severe dysplasia or early cancer. Other modes of intervention, directed toward prevention of dysplasia and possibly regression of Barrett's epithelium, should be sought. Early markers of development toward dysplasia and cancer are necessary if we are to be able to evaluate such measures. Determination of epithelial cell proliferative activity has the potential to be such a marker. A study is now being performed to evaluate the effect of elimination of acid reflux on proliferative activity of Barrett's epithelium in conjunction with the effects of inflammation and development of dysplasia.
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Biologically-targeted discovery-replication scan identifies G×G interaction in relation to risk of Barrett's esophagus and esophageal adenocarcinoma.
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Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
Inherited genetics represents an important contributor to risk of esophageal adenocarcinoma (EAC), and its precursor Barrett's esophagus (BE). Genome-wide association studies have identified ∼30 susceptibility variants for BE/EAC, yet genetic interactions remain unexamined. To address challenges in large-scale G×G scans, we combined knowledge-guided filtering and machine learning approaches, focusing on genes with (A) known/plausible links to BE/EAC pathogenesis (n=493) or (B) prior evidence of biological interactions (n=4,196).
View Article and Find Full Text PDFContext-dependent effects of CDKN2A and other 9p21 gene losses during the evolution of esophageal cancer.
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January 2025
Cancer Systems Biology Laboratory, The Francis Crick Institute, London, UK.
CDKN2A is a tumor suppressor located in chromosome 9p21 and frequently lost in Barrett's esophagus (BE) and esophageal adenocarcinoma (EAC). How CDKN2A and other 9p21 gene co-deletions affect EAC evolution remains understudied. We explored the effects of 9p21 loss in EACs and cancer progressor and non-progressor BEs with matched genomic, transcriptomic and clinical data.
View Article and Find Full Text PDFRefining risk assessment in Barrett's esophagus: addressing follow-up and diagnostic limitations.
J Gastroenterol
January 2025
Institute of Gastroenterology, Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China.
Introduction: Endoscopic ablation is the mainstay treatment for dysplastic Barrett's esophagus (BE), of which radiofrequency ablation (RFA) and argon plasma coagulation (APC) are the most widely available options.
Objectives: We aimed to analyze the safety and outcomes of endoscopic ablation for BE within Polish centers.
Patients And Methods: We retrospectively analyzed data from three high-volume endoscopy units between 2002-2024.
The Mucosal Protection in the Treatment of Erosive Reflux Esophagitis: Mechanisms for Restoring Epithelial Permeability. A Randomized Clinical Trial.
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Omsk State Medical University, Omsk, Russia.
Background And Aims: Gastroesophageal reflux disease (GERD) is widespread in the population and is characterized by the risk of developing Barrett's esophagus and associated adenocarcinoma. Key factors in the progression of the disease are not only the frequency and duration of reflux episodes, but also the resistance of the esophageal mucosa to aggressive reflux molecules. Assessment of the state of tight junction proteins, the rate of their recovery under the influence of various treatment regimens is an urgent task for choosing optimal approaches to curing patients with GERD.
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