Related Experiment Video
Updated: May 30, 2026
08:24
Profiling Luminal pH in Three-Dimensional Gastrointestinal Organoids Using Microelectrodes
Published on: July 5, 2024
Helicobacter pylori Infection and Gastric Adenocarcinoma
Pelayo Correa1, M Blanca Piazuelo
1Anne Potter Wilson Professor of Medicine, Vanderbilt University School of Medicine, Nashville.
US Gastroenterology & Hepatology Review
|August 23, 2011
Summary
Helicobacter pylori infection causes chronic gastritis, a precursor to gastric adenocarcinoma. Identifying high-risk individuals for surveillance can reduce cancer mortality.
Area of Science:
- Gastroenterology
- Oncology
- Microbiology
Background:
- Gastric adenocarcinoma is a major global cause of cancer mortality.
- Helicobacter pylori infection is the primary risk factor for gastric adenocarcinoma.
- While H. pylori infects over half the world's population, only a small fraction develop cancer.
Purpose of the Study:
- To review the complex interplay of factors influencing H. pylori infection outcomes.
- To emphasize the multistep precancerous process in gastric adenocarcinoma development.
- To highlight strategies for reducing gastric cancer mortality.
Main Methods:
- Review of existing literature on H. pylori and gastric adenocarcinoma.
- Analysis of bacterial, host, and environmental factors.
- Discussion of precancerous progression and risk stratification.
Main Results:
- H. pylori infection leads to chronic gastritis, a long-term condition.
- A multistep precancerous process precedes intestinal-type gastric adenocarcinoma.
- Numerous factors modulate infection severity and long-term outcomes.
Conclusions:
- Early identification of individuals at high risk for gastric cancer is crucial.
- Surveillance programs and interventions during the precancerous stage are key.
- Reducing mortality from gastric adenocarcinoma requires a comprehensive approach to H. pylori management.
Related Concept Videos
01:26Gastritis 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...
01:27Peptic Ulcer
Peptic ulcers are erosive lesions of the gastric or duodenal lining, most commonly caused by Helicobacter pylori infection. This Gram-negative, helical bacterium has adapted to survive the stomach’s acidic environment by producing urease, which converts urea into ammonia and carbon dioxide. The ammonia neutralizes gastric acid in the bacterium’s immediate environment, allowing colonization of the gastric mucosa. H. pylori attaches to mucus-secreting epithelial cells, penetrates the mucus...
01:24Peptic Ulcer Disease II: Pathophysiology
Peptic ulcer disease develops when protective mechanisms of the gastrointestinal mucosa are overwhelmed by harmful factors, leading to localized erosions in the stomach or proximal duodenum. The main causes are Helicobacter pylori infection and chronic use of nonsteroidal anti-inflammatory drugs (NSAIDs).Helicobacter pylori–Induced InjuryBacterial Adaptation and Colonization:H. pylori is a spiral, Gram-negative bacterium adapted to the acidic stomach. and transmitted through oral-oral or...
01:28Peptic Ulcer Disease II: Pathophysiology
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.
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.
01:16Treating Helicobacter pylori in Peptic Ulcers: Antimicrobial Therapy
Helicobacter pylori, a resilient gram-negative bacterium, can thrive in the stomach's harsh, acidic environment. Infection with H. pylori leads to a cascade of events within the stomach lining. One of the critical disruptions caused by this bacterium is the interference with somatostatin production, a hormone responsible for regulating acid secretion. This interference tips the balance, escalating acid secretion and diminishing bicarbonate levels. This imbalance compromises the defensive...
01:17Gastritis-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...
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...