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Related Concept Videos

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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Peptic Ulcer Disease I: Introduction01:30

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Peptic Ulcer Disease (PUD) is characterized by mucosal excavation in the esophagus, stomach, pylorus, or duodenum. It can manifest as acute or chronic based on the extent and duration of mucosal involvement.
An acute ulcer, marked by superficial erosion and minimal inflammation, swiftly resolves upon identifying and addressing the underlying cause. In contrast, a chronic ulcer persists, potentially eroding through the muscular wall and forming fibrous tissue.
Peptic ulcers can also be...
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Other Disorders of Digestive System01:30

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The gastrointestinal tract is susceptible to various disorders. If the lower esophageal sphincter is damaged, stomach acid can flow back into the esophagus, causing irritation and inflammation of the lining. This condition is called gastroesophageal reflux disease (known as heartburn) and may cause chest pain and difficulty swallowing. In the stomach, prolonged use of nonsteroidal anti-inflammatory drugs like aspirin, chronic alcohol consumption, bacterial infections such as Helicobacter...
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Gastritis-II: Pathophysiology01:17

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Gastritis is marked by disruption of the mucosal barrier that usually protects the stomach tissue from digestive juices and manifests in acute and chronic forms.
In acute gastritis, the gastric mucosa becomes swollen and red and undergoes superficial erosion. Superficial ulceration may lead to bleeding.
In chronic gastritis, persistent or repeated insults lead to chronic inflammatory changes and, eventually, thinning or atrophy of the gastric tissue.
Gastritis can stem from various causes, each...
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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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Gastroesophageal Reflux Disease I: Meaning and Pathophysiology01:29

Gastroesophageal Reflux Disease I: Meaning and Pathophysiology

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Gastroesophageal Reflux Disease (GERD) involves the recurrent backflow of the stomach or duodenal contents into the esophagus, leading to troublesome symptoms and potential esophageal mucosal damage. Although GERD is often referred to as a disease, it is more accurately described as a syndrome, as it encompasses a range of symptoms and complications rather than a singular pathological entity, impacting a large number of individuals as the most prevalent upper gastrointestinal problem. Roughly...
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Related Experiment Video

Updated: Dec 29, 2025

In Vitro Recording of Mesenteric Afferent Nerve Activity in Mouse Jejunal and Colonic Segments
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Upper Gastrointestinal Sensitization And Symptom Generation.

Alina Suciu1, Stefan-Lucian Popa1, Dan-Lucian Dumitrascu1

  • 1Second Medical Department "Iuliu Hatieganu" University of Medicine and Pharmacy Cluj-Napoca, Romania.

Journal of Medicine and Life
|February 7, 2020
PubMed
Summary
This summary is machine-generated.

Functional gastrointestinal disorders (FGIDs) are common and diagnosed by symptoms, not anatomical issues. This study reviews pathways involved in visceral sensitization, crucial for understanding FGID symptom generation.

Keywords:
ASICs - Acid-sensing ion channelsBrain-Gut InteractionCHS - Cannabinoid hyperemesis syndromeCNS - Central nervous systemCNVS - Chronic nausea vomiting syndromeCVS - Cyclic vomiting syndromeEPS- Epigastric pain syndromeFGIDFGID - Functional gastrointestinal disordersFunctional Gastrointestinal DisordersGNB3 - G-protein-coupled receptor in the brain-gut axisHPA - Hypothalamic-pituitary-adrenalNMDA N-methyl-D-aspartate receptorPDS - Postprandial distress syndromePTSD - Posttraumatic stress disorderSensitizationTRPV1 - The transient receptor potential vanilloid 1.Visceral Hypersensitivity

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Area of Science:

  • Gastroenterology
  • Neurogastroenterology
  • Visceral Pain Research

Background:

  • Functional gastrointestinal disorders (FGIDs) are prevalent, heterogeneous conditions diagnosed via symptom-based criteria without identifiable anatomical or biochemical abnormalities.
  • Chronic visceral symptoms, common in FGIDs and organic diseases, significantly impact patient quality of life.
  • Upper FGID symptoms include early satiety, postprandial fullness, bloating, nausea, vomiting, and epigastric pain, posing diagnostic challenges.

Purpose of the Study:

  • To provide an updated summary of the key pathways involved in visceral sensitization.
  • To review recent literature on the mechanisms underlying gastrointestinal symptom generation and sensitization in FGIDs.

Main Methods:

  • Systematic literature review of recent studies.
  • Focused search on mechanisms of gastrointestinal symptom generation.
  • Analysis of evidence regarding visceral sensitization pathways.

Main Results:

  • FGIDs represent a significant gastroenterological challenge due to prevalence and diagnostic complexity.
  • Visceral sensitization plays a critical role in the generation and persistence of gastrointestinal symptoms.
  • Multiple pathways contribute to altered visceral sensory processing in FGID patients.

Conclusions:

  • Understanding visceral sensitization pathways is essential for advancing FGID diagnosis and treatment.
  • Further research into these mechanisms can improve patient outcomes and quality of life.
  • FGIDs remain an emerging and important area of focus in gastroenterology.