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Related Concept Videos

Barrett Esophagus-II: Clinical Manifestations and Management01:21

Barrett Esophagus-II: Clinical Manifestations and Management

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Individuals with Barrett's esophagus are often asymptomatic, but they may experience symptoms commonly associated with GERD, such as heartburn and acid regurgitation. Additional symptoms can include difficulty swallowing, chest pain, unintentional weight loss, blood in the stool (which may appear black, tarry, or bloody), and episodes of vomiting.
To diagnose Barrett's esophagus, healthcare providers often recommend an endoscopy for those showing symptoms of acid reflux. The procedure...
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Barrett Esophagus-I: Introduction01:21

Barrett Esophagus-I: Introduction

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Barrett's esophagus is a medical condition where the esophageal mucosa is significantly damaged by stomach acid or other digestive fluids, often due to long-term exposure associated with gastroesophageal reflux disease (GERD). In GERD, a weakened or abnormally relaxed lower esophageal sphincter allows stomach acid to flow persistently into the esophagus.
This constant acid exposure transforms the esophagus's pink mucosal lining (stratified squamous epithelium) into a type of lining more...
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Esophageal Strictures-I: Introduction01:30

Esophageal Strictures-I: Introduction

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Esophageal strictures involve abnormal narrowing or tightening of the esophagus. They vary in length and severity, ranging from mild constriction to complete obstruction, and are classified as benign (noncancerous) or malignant (cancerous).
Etiology
The primary cause of esophageal strictures is long-standing gastroesophageal reflux disease (GERD), accounting for about 70 to 80% of adult cases. Chronic acid reflux can lead to injury and scarring of the esophageal lining, culminating in...
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Esophageal Strictures-II: Clinical Features and Management01:26

Esophageal Strictures-II: Clinical Features and Management

77
Patients with esophageal strictures often experience a range of symptoms. Initially, they may have difficulty swallowing solid foods, which can progress to include liquids. Additional symptoms may involve chest pain or discomfort, regurgitating food and fluids, heartburn, unintentional weight loss, coughing or choking during meals, and hoarseness.
Healthcare providers should gather a comprehensive medical history and conduct a physical examination for diagnosis. If esophageal stricture is...
77
Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

683
The gastric glands contain parietal cells that secrete hydrochloric acid (HCl) for digestion. The cells secrete HCl because it is highly corrosive and essential for breaking down food. To achieve this, they secrete hydrogen and chloride ions into the lumen of the gastric glands, which combine to form HCl.
Within parietal cells, carbonic acid is first formed through the reaction of water and carbon dioxide. The dissociation of carbonic acid releases bicarbonate and hydrogen ions. The bicarbonate...
683
Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors01:24

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors

438
Peptic ulcer disease, commonly called PUD, represents a multifaceted condition characterized by disruptions in the lining of the gastrointestinal (GI)  tract. Central to the protection of the gastrointestinal lining is the mucosal-bicarbonate barrier. This physiological defense mechanism is a formidable shield against the corrosive effects of gastric acid and pepsin secretion in the stomach. Its role is pivotal in maintaining the structural integrity of the stomach's inner lining.
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Related Experiment Video

Updated: Jul 11, 2025

Author Spotlight: Investigating the Pathophysiology of Eosinophilic Esophagitis
03:23

Author Spotlight: Investigating the Pathophysiology of Eosinophilic Esophagitis

Published on: May 10, 2024

791

Barrier Dysfunction in Eosinophilic Esophagitis.

Emily C McGowan1, Roopesh Singh2, David A Katzka3

  • 1Division of Allergy and Immunology, University of Virginia School of Medicine, PO Box 801355, Charlottesville, VA, 22908, USA. ekc5v@virginia.edu.

Current Gastroenterology Reports
|November 11, 2023
PubMed
Summary
This summary is machine-generated.

Epithelial barrier dysfunction is key in eosinophilic esophagitis (EoE). Factors like genetics and environment worsen this, promoting inflammation and suggesting new therapeutic targets.

Keywords:
Eosinophilic EsophagitisEpithelial cellEsophageal barrierTSLP

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Area of Science:

  • Gastroenterology
  • Immunology
  • Cell Biology

Background:

  • Epithelial barrier dysfunction is increasingly recognized as central to eosinophilic esophagitis (EoE) pathophysiology.
  • Understanding the drivers of this dysfunction is crucial for developing effective treatments.

Purpose of the Study:

  • To review genetic, environmental, and immunologic factors contributing to epithelial barrier dysfunction in EoE.
  • To explore how impaired epithelial barriers exacerbate inflammation in EoE.

Main Methods:

  • Literature review of studies investigating epithelial barrier function in EoE.
  • Analysis of genetic, environmental, and immunological factors.
  • Examination of molecular mechanisms, including cytokine effects and microbial alterations.

Main Results:

  • Environmental exposures (e.g., detergents) directly impact the esophageal barrier.
  • IL-13-induced barrier dysfunction may be mitigated by 17β-estradiol, Vitamin D, and short-chain fatty acids (butyrate, propionate).
  • Multiple factors converge to impair the epithelial barrier, promoting a "Th2" immune response, dysbiosis, and antigen penetration.

Conclusions:

  • Epithelial barrier dysfunction is a critical, multifactorial component of EoE.
  • Therapeutic strategies targeting barrier repair and mitigating inflammatory pathways show promise.
  • Further research into these factors could lead to novel treatment approaches for EoE.