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Related Concept Videos

Peptic Ulcer01:27

Peptic 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...
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...
Peptic Ulcer Disease I: Introduction01:30

Peptic 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...
Peptic Ulcer Disease I: Introduction01:25

Peptic 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...
Peptic Ulcer Disease III: Clinical Manifestations and Complications01:25

Peptic 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...
What is Monogastric Digestion?01:50

What is Monogastric Digestion?

The human body contains a monogastric digestive system. In a monogastric digestive system, the stomach only contains one chamber in which it digests food. Several other animal species also have monogastric digestive systems, including pigs, horses, dogs, and birds. This chapter, however, focuses on the human digestive system.

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Related Experiment Video

Updated: Jul 20, 2026

Mouse Models Of Helicobacter Infection And Gastric Pathologies
07:43

Mouse Models Of Helicobacter Infection And Gastric Pathologies

Published on: October 18, 2018

Helicobacter and digestive malignancies.

Teresa Starzyñska1, Peter Malfertheiner

  • 1Department of Gastroenterology, Pomeranian Medical University, Szczecin, Poland.

Helicobacter
|August 24, 2006
PubMed
Summary

New research highlights Helicobacter infection’s role in gastric cancer, suggesting bone marrow cells drive neoplastic proliferation after mucosal damage. This infection may also elevate risks for liver and colon neoplasias.

Area of Science:

  • Gastroenterology
  • Oncology
  • Infectious Diseases

Background:

  • Helicobacter pylori infection is a known risk factor for gastric cancer.
  • The precise mechanisms linking H. pylori to gastric neoplasia are still under investigation.
  • Recent findings suggest a broader impact of H. pylori beyond the stomach.

Purpose of the Study:

  • To review recent data on the relationship between Helicobacter infection and gastric neoplasias.
  • To explore a novel hypothesis on the pathogenesis of gastric cancer involving bone marrow-derived cells.
  • To examine the role of inflammatory cytokine gene polymorphisms in H. pylori-associated malignancy.
  • To investigate the association of H. pylori infection with extragastric neoplasias.

Main Methods:

More Related Videos

Establishment and Evaluation of a Risk Prediction Model for Pathological Escalation of Gastric Low-Grade Intraepithelial Neoplasia
03:05

Establishment and Evaluation of a Risk Prediction Model for Pathological Escalation of Gastric Low-Grade Intraepithelial Neoplasia

Published on: February 16, 2024

Related Experiment Videos

Last Updated: Jul 20, 2026

Mouse Models Of Helicobacter Infection And Gastric Pathologies
07:43

Mouse Models Of Helicobacter Infection And Gastric Pathologies

Published on: October 18, 2018

Establishment and Evaluation of a Risk Prediction Model for Pathological Escalation of Gastric Low-Grade Intraepithelial Neoplasia
03:05

Establishment and Evaluation of a Risk Prediction Model for Pathological Escalation of Gastric Low-Grade Intraepithelial Neoplasia

Published on: February 16, 2024

  • Review of recently published data and animal experiments.
  • Focus on cellular and molecular mechanisms of gastric carcinogenesis.
  • Analysis of studies investigating inflammatory cytokine gene polymorphisms.
  • Examination of epidemiological evidence for extragastric neoplasias.

    • Main Results:

    • A new hypothesis suggests bone marrow-derived cells replace damaged gastric mucosa and undergo neoplastic proliferation.
    • Studies highlight the role of inflammatory cytokine gene polymorphisms in gastric malignancy development.
    • Emerging evidence links H. pylori infection to increased risk of liver and colon neoplasias.

    Conclusions:

    • Helicobacter pylori infection plays a critical role in gastric cancer pathogenesis through mucosal damage and potential neoplastic transformation of infiltrating cells.
    • Inflammatory responses and genetic factors influence cancer development in infected individuals.
    • H. pylori infection may increase the risk of cancers in organs outside the stomach, including the liver and colon.