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Updated: Aug 17, 2026
Quantitative Polymerase Chain Reaction (qPCR)-Based Rapid Diagnosis of Helicobacter pylori Infection and Antibiotic Resistance
Published on: July 28, 2023
Adherence of Helicobacter pylori
1Division of Gastroenterology, Queens Medical Centre, Nottingham, UK.
Abstract:
Helicobacter pylori infects only gastric type epithelium, to which it adheres closely and forms attaching-effacing lesions. Similar lesions are also seen in ferrets infected with Helicobacter mustelae, the only other host in which peptic ulcer occurs during the course of infection. These observations imply a specific interaction between bacterial adhesin(s) and host receptor(s). They account for the adherence of H. pylori to the gastric epithelium and suggest that adherence is an important virulence factor. Numerous experimental methods, each with their own advantages or disadvantages, are available to study the interaction and characterize the nature of bacterial adhesins and their receptors. Many studies have shown that H. pylori is able to agglutinate red blood cells. Amongst several bacterial lectins, at least one adhesin has a sialic acid receptor specificity. However, the gene encoding this putative adhesin is larger than originally thought, whilst the function and location of its product is unclear. Adherence of H. pylori to a wide variety of cell lines (gastric and non-gastric) has also been shown, and is necessary for the induction of pro-inflammatory responses. However, there is little evidence to support an association between haemagglutination and extent or pattern of adherence to gastric epithelium or gastric-derived cell lines.
Insights
Helicobacter pylori adherence to gastric cells is crucial for virulence. While H. pylori can agglutinate red blood cells, this hemagglutination doesn't directly correlate with its adherence to gastric epithelium.
Area of Science:
- Microbiology
- Pathogenesis
- Cell Biology
Background:
- Helicobacter pylori specifically infects gastric epithelium, forming attaching-effacing lesions, similar to Helicobacter mustelae in ferrets, suggesting specific host-pathogen interactions.
- Bacterial adherence is a key virulence factor for H. pylori, necessitating studies on bacterial adhesins and host receptors.
- Peptic ulcer disease is associated with H. pylori and H. mustelae infections.
Purpose of the Study:
- To investigate the specific interactions between Helicobacter pylori adhesins and host receptors.
- To characterize the nature of bacterial adhesins and their role in H. pylori adherence and virulence.
- To explore the relationship between hemagglutination and adherence to gastric epithelial cells.
Main Methods:
- Review of experimental methods for studying bacterial adhesin-host receptor interactions.
- Analysis of studies on Helicobacter pylori hemagglutination properties.
- Examination of evidence linking hemagglutination to adherence patterns in gastric cell lines.
Main Results:
- Helicobacter pylori exhibits adherence to gastric epithelium, forming attaching-effacing lesions.
- H. pylori can agglutinate red blood cells, with some adhesins showing sialic acid receptor specificity.
- No strong evidence supports a direct association between hemagglutination and the extent or pattern of adherence to gastric epithelium.
Conclusions:
- Specific adhesin-receptor interactions mediate H. pylori adherence to gastric epithelium, a critical step in pathogenesis.
- While hemagglutination occurs, its role in H. pylori's interaction with gastric mucosa remains unclear.
- Further research is needed to elucidate the function and location of putative adhesins involved in H. pylori virulence.
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