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Related Concept Videos

Cholecystitis01:20

Cholecystitis

Cholecystitis is inflammation of the gallbladder, most commonly caused by obstruction of the cystic duct. This blockage prevents bile from draining, leading to gallbladder distension, inflammation, and potentially serious complications. This condition may present acutely or chronically and can happen with or without gallstones.EtiologyAbout 95% of cholecystitis cases are calculous, caused by gallstones blocking the cystic duct, leading to bile accumulation and inflammation of the gallbladder...
Gastritis-II: Pathophysiology01:17

Gastritis-II: Pathophysiology

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...
Gastritis II: Pathophysiology01:26

Gastritis II: Pathophysiology

The pathophysiology of gastritis begins with the colonization of the stomach lining by Helicobacter pylori (H. pylori). This bacterium spreads mainly via the oral-oral route through saliva or shared utensils, and can also be transmitted in overcrowded or unhygienic environments through contaminated water, despite its brief survival outside the body.ColonizationOnce ingested, H. pylori enters the stomach and begins colonization by navigating through the mucus layer lining the stomach wall. It...
Chronic Pancreatitis II: Pathophysiology01:21

Chronic Pancreatitis II: Pathophysiology

Chronic pancreatitis is a progressive and irreversible inflammation of the pancreas, most often caused by long-term alcohol abuse, but it can also be related to ductal obstruction, smoking, or genetic factors.Chronic pancreatitis occurs when the pancreas is repeatedly exposed to harmful agents like alcohol, smoking, ductal obstruction, or genetic predisposition. These factors lead to the release of toxic metabolites and inflammatory cytokines, sustaining chronic inflammation in the pancreatic...
Cholesterol: Significance and Regulation01:29

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Acute Pancreatitis II: Pathophysiology01:21

Acute Pancreatitis II: Pathophysiology

The pathophysiology of acute pancreatitis centers on injury to pancreatic acinar cells, which initiates a cascade of harmful intracellular events.This injury leads to premature activation of trypsinogen to trypsin in the pancreas. Trypsin then activates other digestive enzymes, such as chymotrypsin, elastase, and phospholipase A2, which begin breaking down pancreatic tissue. The resulting autodigestion causes local inflammation, tissue swelling, hemorrhage, and fat necrosis.Injured acinar cells...

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Related Experiment Video

Updated: Jun 25, 2026

Sodium Taurocholate Induced Severe Acute Pancreatitis in C57BL/6 Mice
06:35

Sodium Taurocholate Induced Severe Acute Pancreatitis in C57BL/6 Mice

Published on: June 28, 2021

[Cholesterol gallstone pathogenesis].

N Méndez1, M Uribe, J Jessurun

  • 1Departamento de Gastroenterología, Instituto Nacional de la Nutrición "Salvador Zubirán", Vasco de Quiroga núm. 15, México 14000, DF México.

Revista De Investigacion Clinica; Organo Del Hospital De Enfermedades De La Nutricion
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

Cholesterol gallstone formation involves four key steps: metabolic defects, bile supersaturation, nucleation, and crystal growth. This review examines biliary physiology and gallbladder changes during gallstone development.

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Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol
10:12

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Published on: March 25, 2020

Related Experiment Videos

Last Updated: Jun 25, 2026

Sodium Taurocholate Induced Severe Acute Pancreatitis in C57BL/6 Mice
06:35

Sodium Taurocholate Induced Severe Acute Pancreatitis in C57BL/6 Mice

Published on: June 28, 2021

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol
10:12

Enrichment of Mammalian Tissues and Xenopus Oocytes with Cholesterol

Published on: March 25, 2020

Area of Science:

  • Gastroenterology
  • Biliary Physiology
  • Pathophysiology

Context:

  • Gallstones are a common ailment with significant health implications.
  • Understanding the multi-step process of gallstone formation is crucial for effective treatment strategies.
  • Current research focuses on the intricate details of each stage in lithogenesis.

Purpose:

  • To provide a comprehensive review of the theoretical steps in cholesterol gallstone formation.
  • To examine the physiological and pathological alterations of the gallbladder during lithogenesis.
  • To synthesize current knowledge on metabolic defects, bile supersaturation, nucleation, and crystal growth.

Summary:

  • Cholesterol gallstone formation is a sequential process initiated by metabolic or genetic defects leading to supersaturated bile.
  • Subsequent nucleation and growth of cholesterol crystals within the gallbladder result in gallstone development.
  • This review details each of these four essential steps and associated gallbladder alterations.

Impact:

  • Enhances understanding of cholesterol gallstone pathogenesis.
  • Provides a foundation for further research into preventative and therapeutic interventions.
  • Aids clinicians in diagnosing and managing patients with gallstones.