Outer membrane inflammatory protein A, a new virulence factor involved in the pathogenesis of Helicobacter pylori
Jinyong Zhang1, Jiajun Qian, Xiaoli Zhang
1Department of Microbiology and Biochemical Pharmacy, National Engineering Research Center of Immunological Products, College of Pharmacy, Third Military Medical University, Chongqing, 400038, People's Republic of China.
Abstract:
Outer membrane proteins (OMPs) represent an important class of proteins that are observed in gram-negative bacteria, mitochondria and chloroplasts. These proteins play diverse biological roles in protein translocation, cell-cell communication and signal transduction. A variety of OMPs have been identified in the gastrointestinal pathogen Helicobacter pylori (H. pylori) since it was first isolated in 1983. Among these proteins, outer membrane inflammatory protein A (OipA), which is encoded by hopH and unique to this pathogen, is a differentially expressed outer membrane protein that has been confirmed to be directly linked to H. pylori colonization, as well as to the pathogenesis of H. pylori and disease outcome. In this review, we will describe the progress of recent studies on OipA, particularly those on the functions and biological significance of this unique protein.
Insights
Outer membrane inflammatory protein A (OipA) is a unique protein in Helicobacter pylori. This review details OipA
Area of Science:
- Microbiology
- Molecular Biology
- Pathogenesis
Background:
- Outer membrane proteins (OMPs) are crucial in gram-negative bacteria, mitochondria, and chloroplasts.
- Helicobacter pylori (H. pylori), a gastrointestinal pathogen, possesses various OMPs.
- OipA, encoded by hopH, is a unique, differentially expressed OMP in H. pylori.
Purpose of the Study:
- To review recent studies on Outer membrane inflammatory protein A (OipA).
- To elucidate the functions and biological significance of OipA in H. pylori.
Main Methods:
- Literature review of studies on OipA.
- Analysis of OipA's role in H. pylori.
Main Results:
- OipA is directly linked to H. pylori colonization.
- OipA influences H. pylori pathogenesis and disease outcomes.
Conclusions:
- OipA is a key virulence factor in H. pylori.
- Further research on OipA's functions is warranted.
More Related Videos
Related Concept Videos
Gastritis II: Pathophysiology
Peptic Ulcer Disease II: Pathophysiology
Peptic Ulcer Disease II: Pathophysiology
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.
Pathophysiology of Peptic Ulcer Disease: Injurious Factors
In the antrum region, G cells secrete the gastrin hormone that binds to gastrin-cholecystokinin-B (CCK2) receptors on parietal and enterochromaffin-like (ECL) cells in the fundic glands. Simultaneously, the vagus nerve releases acetylcholine, which binds...
Peptic Ulcer
Gastritis-II: Pathophysiology
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...


