Related Experiment Video
Updated: Jul 1, 2026
07:43
Mouse Models Of Helicobacter Infection And Gastric Pathologies
Published on: October 18, 2018
Helicobacter and gastric malignancies.
António Carlos Ferreira1, Hajime Isomoto, Masatsugu Moriyama
1IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal.
Helicobacter
|September 12, 2008
Summary
Helicobacter pylori infection increases gastric cancer risk due to stomach changes. Recent research explores environmental, genetic, and bacterial factors, plus cellular interactions, to understand this link.
Area of Science:
- Gastroenterology
- Oncology
- Microbiology
Background:
- Helicobacter pylori (H. pylori) is a stomach bacterium linked to increased gastric cancer risk.
- The development of cancer is associated with physiological and histological alterations caused by H. pylori infection.
Purpose of the Study:
- To review recent research on the association between H. pylori infection and gastric cancer.
- To summarize findings from epidemiologic, molecular, and cell biology studies.
Main Methods:
- Review of studies published within the last year.
- Analysis of epidemiologic approaches identifying risk factors (environmental, host genetics, bacterial).
- Examination of molecular and cell biology studies investigating H. pylori-epithelial cell interactions.
Main Results:
- Numerous studies have characterized the H. pylori-gastric cancer association.
- Research spans diverse methodologies, from population-level epidemiology to cellular mechanisms.
- Focus on factors influencing cancer risk and the bacteria's interaction with host cells.
Conclusions:
- Recent research has significantly advanced the understanding of H. pylori's role in gastric carcinogenesis.
- A comprehensive view integrating epidemiological and molecular findings is crucial.
- Continued investigation is needed to fully elucidate the complex relationship and inform prevention strategies.
More Related Videos
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...
01:16Treating 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...
01:30Peptic Ulcer Disease I: Introduction
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...
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...
01:25Peptic Ulcer Disease I: Introduction
Peptic ulcer disease (PUD) involves breaks in the gastrointestinal tract's mucosal lining, primarily in the stomach and duodenum, with less frequent occurrences in the lower esophagus or near the pylorus.Ulcers can be acute or chronic. Acute ulcers are short-lived with minimal inflammation and heal quickly after the irritant is removed. Chronic ulcers persist, may recur, and often cause scarring due to ongoing tissue damage. Superficial erosions affect only the mucosal layer and are called...
01:25Peptic Ulcer Disease III: Clinical Manifestations and Complications
Duodenal UlcersDuodenal ulcers are the most common form of peptic ulcer disease, presenting with chronic, intermittent epigastric pain. Pain typically appears 2–3 hours after meals, especially when the stomach is empty, often waking patients at night. It is characteristically relieved by food or antacids (“pain–food–relief”). Some patients remain asymptomatic until complications like bleeding or perforation emerge, particularly with NSAID or anticoagulant use.Gastric UlcersGastric ulcers share...