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Updated: May 19, 2026
Enrichment and Detection of Clostridium perfringens Toxinotypes in Retail Food Samples
Published on: October 18, 2019
[New insight from basic research of Clostridium perfringens alpha-toxin]
1Department of Microbiology, Faculty of Pharmaceutical Sciences, Tokushima Bunri University.
Abstract:
Clostridium perfringens causes gas gangrene with inflammatory myopathies and infrequently septicemia associated with massive intravascular hemolysis. The microorganism is known to produce a variety of toxins and enzymes that are responsible for severe myonecrotic lesions. Notably, alpha-toxin, which possesses hemolytic, necrotic and lethal activities, and phospholipase C and sphingomyelinase activities, is an important agent for the diseases. The cytokine storm induced by alpha-toxin, mainly the release of TNF-alpha, plays an important role in the death and massive hemolysis. The toxin-induced release of TNF-alpha from neutrophils and macrophages is dependent on the activation of ERK1/2 signal transduction via TrkA receptor. In addition, 14- and 15-membered macrolides specifically block the toxin-induced events through the activation of neutrophils and macrophages.
Insights
Clostridium perfringens alpha-toxin causes severe disease by inducing a cytokine storm. Macrolide antibiotics can block these harmful toxin effects by modulating immune cell responses.
Area of Science:
- Microbiology
- Immunology
- Toxicology
Background:
- Clostridium perfringens is a bacterium causing gas gangrene and septicemia.
- Alpha-toxin is a key virulence factor responsible for myonecrosis and hemolysis.
- Cytokine storm, particularly TNF-alpha release, contributes to disease severity.
Purpose of the Study:
- To investigate the mechanism of alpha-toxin-induced cytokine storm.
- To explore the role of ERK1/2 signaling and TrkA receptors in toxin effects.
- To evaluate the potential of macrolides in mitigating toxin-induced pathology.
Main Methods:
- In vitro studies using neutrophils and macrophages.
- Analysis of cytokine release (TNF-alpha).
- Assessment of signal transduction pathways (ERK1/2).
- Evaluation of macrolide effects on toxin-induced cellular responses.
Main Results:
- Alpha-toxin induces TNF-alpha release via ERK1/2 activation through TrkA receptors.
- This pathway is crucial for toxin-mediated hemolysis and lethality.
- 14- and 15-membered macrolides inhibit these toxin-induced events.
Conclusions:
- Alpha-toxin triggers a detrimental cytokine storm dependent on specific signaling pathways.
- Macrolides show therapeutic potential by blocking key steps in the toxin's mechanism of action.
- Targeting these pathways could offer new strategies for treating C. perfringens infections.
