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Updated: Jul 10, 2026

Implementation of a Permeable Membrane Insert-based Infection System to Study the Effects of Secreted Bacterial Toxins on Mammalian Host Cells
Published on: August 19, 2016
Bacterial pore-forming toxins: the (w)hole story?
M R Gonzalez1, M Bischofberger, L Pernot
1Ecole Polytechnique Fédérale de Lausanne, Global Health Institute, Station 15, 1015 Lausanne, Switzerland.
Abstract:
Pore-forming toxins (PFTs) are the most common class of bacterial protein toxins and constitute important bacterial virulence factors. The mode of action of PFT is starting to be better understood. In contrast, little is known about the cellular response to this threat. Recent studies reveal that cells do not just swell and lyse, but are able to sense and react to pore formation, mount a defense, even repair the damaged membrane and thus survive. These responses involve a variety of signal-transduction pathways and sophisticated cellular mechanisms such as the pathway regulating lipid metabolism. In this review we discuss the different classes of bacterial PFTs and their modes of action, and provide examples of how the different bacteria use PFTs. Finally, we address the more recent field dealing with the eukaryotic cell response to PFT-induced damage.
Insights
Pore-forming toxins (PFTs) damage cells, but cells can sense and defend against this bacterial threat. Eukaryotic cells mount complex responses, including repairing membranes, to survive PFT-induced damage.
Area of Science:
- Microbiology
- Cell Biology
- Toxicology
Background:
- Pore-forming toxins (PFTs) are key bacterial virulence factors.
- Understanding PFT mechanisms is advancing, but cellular responses remain less understood.
Purpose of the Study:
- To review bacterial PFT classes and their action.
- To explore eukaryotic cellular defense and repair mechanisms against PFTs.
Main Methods:
- Literature review of PFTs and cellular responses.
- Discussion of signal-transduction pathways and lipid metabolism in cellular defense.
Main Results:
- Cells actively sense and react to PFT pore formation.
- Eukaryotic cells employ defense and repair strategies, including lipid metabolism regulation.
- Survival is possible through these sophisticated cellular responses.
Conclusions:
- Eukaryotic cells possess robust mechanisms to counteract PFTs.
- Cellular responses to PFTs involve complex signaling and metabolic pathways.
- This highlights a critical aspect of host-pathogen interactions.
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