Related Experiment Video
Updated: May 29, 2026
10:44
One-step Negative Chromatographic Purification of Helicobacter pylori Neutrophil-activating Protein Overexpressed in Escherichia coli in Batch Mode
Published on: June 18, 2016
Helicobacter pylori and nonmalignant diseases
Alaa Alakkari1, Angelo Zullo, Humphrey J O'Connor
1Department of Gastroenterology, Adelaide and Meath Hospital, Faculty of Health Sciences of Trinity College, Dublin, Ireland.
Helicobacter
|September 8, 2011
Summary
Peptic ulcer disease (PUD) linked to Helicobacter pylori is declining, yet complications persist. Research explores idiopathic ulcers, functional dyspepsia, and the inverse link between H. pylori and GERD.
Area of Science:
- Gastroenterology
- Microbiology
Background:
- Helicobacter pylori-related peptic ulcer disease (PUD) prevalence is decreasing.
- Non-H. pylori, non-NSAID (idiopathic) ulcers are increasingly recognized.
- Ulcer complication and mortality rates remain high despite reduced PUD incidence.
Purpose of the Study:
- To review recent research on peptic ulcer disease trends and related conditions.
- To explore the unclear role of H. pylori in functional dyspepsia.
- To investigate the inverse relationship between H. pylori and gastroesophageal reflux disease (GERD).
Main Methods:
- Literature review of research published over the past year.
- Analysis of trends in H. pylori-related vs. idiopathic ulcers.
- Examination of factors influencing the H. pylori-GERD relationship.
Main Results:
- Continued decline in H. pylori-related PUD.
- Increased identification of idiopathic ulcers.
- Persistent high rates of ulcer complications and mortality.
- Unclear role of H. pylori in functional dyspepsia, with some viewing it as organic.
- Growing acceptance of an inverse H. pylori-GERD relationship.
Conclusions:
- While H. pylori-PUD declines, ulcer complications and mortality remain a concern.
- The relationship between H. pylori, functional dyspepsia, and GERD requires further investigation.
- Factors like H. pylori phenotypes, post-eradication weight gain, and hormonal changes are areas of focus.
Related Concept Videos
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...
01:26Gastritis 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...
01:30Peptic 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...
01:24Peptic 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.