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Related Concept Videos

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors01:24

Pathophysiology of Peptic Ulcer Disease: Mucosal Defense Factors

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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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Mucosal Barrier of the Stomach01:25

Mucosal Barrier of the Stomach

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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...
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Peptic Ulcer Disease II: Pathophysiology01:28

Peptic Ulcer Disease II: Pathophysiology

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Peptic Ulcer Disease (PUD) is characterized by the development of ulcers in the stomach or duodenal mucosa. Its pathophysiology is complex, involving a balance between damaging and protective elements.
Damaging agents such as Helicobacter pylori, gastric acid, pepsin, and nonsteroidal anti-inflammatory drugs (NSAIDs) can weaken the mucosal defense, allowing hydrogen ions to infiltrate back and harm epithelial cells.
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Drugs Used in Upper Respiratory Disorders: Overview01:16

Drugs Used in Upper Respiratory Disorders: Overview

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Upper respiratory tract disorders, including viral infections and allergic rhinitis, cause significant discomfort and disrupt daily life. Managing these conditions involves a variety of drugs, such as antihistamines, intranasal steroids, decongestants, antitussives, expectorants, and mucolytics. Specific examples of drugs in each category are provided.
Antihistamines (e.g., Benadryl) block histamines from binding. Histamines are chemicals released during an allergic reaction in the body. As a...
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Pathophysiology of Peptic Ulcer Disease: Injurious Factors01:22

Pathophysiology of Peptic Ulcer Disease: Injurious Factors

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Peptic ulcers are sores on the stomach's inner lining and the upper small intestine, which are the result of disruptions in the mucosal layer that houses parietal cells which produce gastric acid, and chief cells which secrete pepsinogen.
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds...
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Chronic Obstructive Pulmonary Disease-II: Pathophysiology01:20

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

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Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
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Related Experiment Video

Updated: Oct 9, 2025

Rapid Viscoelastic Characterization of Airway Mucus Using a Benchtop Rheometer
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Mucins Dynamics in Physiological and Pathological Conditions.

Hassan Melhem1, Daniel Regan-Komito2, Jan Hendrik Niess1,3

  • 1Department of Biomedicine, University of Basel, 4031 Basel, Switzerland.

International Journal of Molecular Sciences
|December 24, 2021
PubMed
Summary

Goblet cells (GCs) produce the intestinal mucus layer, crucial for gut health. Dysfunctional mucus barriers are linked to inflammatory bowel disease (IBD), but GC regulation mechanisms require further study.

Keywords:
Muc2 mucinglycangoblet cellinflammatory bowel diseasesmicrobiotamucus barrier

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Mucin Agarose Gel Electrophoresis: Western Blotting for High-molecular-weight Glycoproteins
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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging
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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging
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Three-dimensional Quantification of Intestinal Mucus Using Whole-mount Tissue Imaging

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Area of Science:

  • Gastroenterology and Immunology
  • Epithelial Biology
  • Microbiome Research

Background:

  • The intestinal mucus layer, secreted by goblet cells (GCs), is vital for separating gut microbes from epithelial cells.
  • Defects in mucin production (e.g., Muc2 deficiency) lead to colitis and increased susceptibility to pathogens.
  • GC and mucus layer dysfunction are implicated in inflammatory bowel disease (IBD) pathogenesis.

Purpose of the Study:

  • To review novel findings on divergent goblet cell subtypes and their functions.
  • To discuss factors influencing mucus layer physiology, including host, diet, and microbial factors.
  • To explore the role of altered mucus barriers in the development of IBD.

Main Methods:

  • Literature review of recent studies on goblet cell physiology and mucus layer dynamics.
  • Analysis of findings related to goblet cell subtypes and their expression profiles.
  • Synthesis of information on internal and external modulators of the mucus barrier.

Main Results:

  • Goblet cells exhibit diverse functionalities and expression patterns within intestinal crypts.
  • Host factors, diet, and gut bacteria significantly modulate mucus layer properties.
  • Impaired mucus barrier function is a key contributor to IBD onset.

Conclusions:

  • Understanding goblet cell heterogeneity is crucial for elucidating mucus barrier regulation.
  • A comprehensive view of factors affecting the mucus layer is essential for IBD research.
  • Targeting mucus barrier integrity may offer therapeutic strategies for IBD.