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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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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.
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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.
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Gastritis III: Clinical Manifestations and Management01:23

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The clinical manifestations of gastritis can vary depending on the cause and type of gastritis, but some common symptoms may include the following.
Clinical manifestations of acute gastritis
The patient with acute gastritis may have a rapid onset of symptoms, such as epigastric pain or discomfort, dyspepsia, anorexia, hiccups, or nausea and vomiting, which can last from a few hours to a few days. Erosive or hemorrhagic gastritis may cause bleeding, which may manifest as blood in vomit or as...
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Peptic Ulcer Disease IV: Management01:26

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Medical treatment strategies for peptic ulcers encompass various methods. The primary goal of treatment is to diminish gastric acidity and strengthen mucosal defense mechanisms.
The therapeutic approach involves ensuring adequate rest, implementing drug therapy, promoting smoking cessation, making dietary modifications, and emphasizing long-term follow-up care.
Pharmacological management
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Mucosal Barrier of the Stomach01:25

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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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Gastrin and upper GI cancers.

Yoku Hayakawa1, Wenju Chang2, Guangchun Jin3

  • 1Division of Digestive and Liver Diseases and Herbert Irving Cancer Research Center, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA; Department of Gastroenterology, Graduate School of Medicine, The University of Tokyo, Tokyo 1138655, Japan.

Current Opinion in Pharmacology
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This summary is machine-generated.

Gastrin, a hormone affecting stomach acid and growth, may influence upper gastrointestinal cancers. Long-term proton pump inhibitor use can increase gastrin levels, raising questions about its role in gastric cardia and esophageal cancers.

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Area of Science:

  • Gastroenterology
  • Oncology
  • Endocrinology

Background:

  • Gastrin, initially known for stimulating gastric acid, is also a growth factor for the proximal stomach via the CCK2R receptor.
  • Decades of research have investigated gastrin and its precursors' involvement in cancer development.
  • Long-term use of proton pump inhibitors (PPIs) is associated with elevated serum gastrin levels in patients with upper gastrointestinal diseases.

Purpose of the Study:

  • To review the potential roles of gastrin peptides in the development of upper gastrointestinal cancers.
  • To address emerging questions regarding gastrin's influence on gastric cardia cancer and esophageal adenocarcinoma.

Main Methods:

  • Literature review and synthesis of existing research on gastrin and upper GI cancer.
  • Analysis of the relationship between elevated gastrin levels (often due to PPI use) and cancer development.
  • Examination of gastrin's differential effects on distal versus proximal stomach and esophageal cancers.

Main Results:

  • Evidence suggests gastrin does not promote, and may suppress, distal gastric cancer.
  • Questions remain about gastrin's role in the development of gastric cardia cancer and esophageal adenocarcinoma at the gastroesophageal junction.
  • Elevated gastrin levels due to long-term PPI use warrant further investigation into their oncogenic potential in specific upper GI regions.

Conclusions:

  • The role of gastrin in upper gastrointestinal cancer is complex and region-specific.
  • Further research is needed to clarify the impact of elevated gastrin on gastric cardia and esophageal cancers.
  • Understanding gastrin's dual role as a growth factor and potential oncoprotein is crucial for managing upper GI diseases and associated cancers.