How Anthrax Edema Toxin Affects T Cell Signaling
Author Information
Author(s): Puhar Andrea, Dal Molin Federica, Horvath Stéphanie, Ladants Daniel, Montecucco Cesare
Primary Institution: Dipartimento di Scienze Biomediche Sperimentali, Università di Padova, Padova, Italy
Hypothesis
The study investigates how anthrax edema toxin modulates cAMP-dependent signaling in T cells.
Conclusion
The study concludes that anthrax edema toxin initially activates PKA-dependent signaling but later inhibits CREB phosphorylation, impairing T cell responses.
Supporting Evidence
- EdTx causes a prolonged increase in intracellular cAMP concentration.
- EdTx leads to nuclear translocation of PKA and phosphorylation of CREB.
- Pre-treatment with EdTx prevents CREB phosphorylation in response to other stimuli.
Takeaway
Anthrax toxin can trick T cells by first making them active and then shutting them down, which helps the bacteria avoid being attacked by the immune system.
Methodology
The study used Jurkat T cells to analyze the effects of anthrax edema toxin on cAMP levels and CREB phosphorylation.
Digital Object Identifier (DOI)
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