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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Caspase-1 activation of IL-1beta and IL-18 are essential for Shigella flexneri-induced inflammation.

Caspases are intracellular proteases that mediate mammalian cell apoptosis. Caspase-1 (Casp-1) is a unique caspase because it activates the proinflammatory cytokines interleukin (IL)-1beta and IL-18. Shigella flexneri, the etiological agent of bacillary dysentery, induces macrophage apoptosis, which requires Casp-1 and results in the release of mature IL-1beta and IL-18. Here we show that casp-1(-/-) mice infected with S. flexneri do not develop the acute inflammation characteristic of shigellosis and are unable to resolve the bacterial infection. Using casp-1(-/-) mice supplemented with recombinant cytokines and experiments with IL-1beta(-/-) and IL-18(-/-) mice, we show that IL-1beta and IL-18 are both required to mediate inflammation in S. flexneri infections. Together, these data demonstrate the importance of Casp-1 in acute inflammation and show the different roles of its substrates, IL-1beta and IL-18, in this response.[1]

References

  1. Caspase-1 activation of IL-1beta and IL-18 are essential for Shigella flexneri-induced inflammation. Sansonetti, P.J., Phalipon, A., Arondel, J., Thirumalai, K., Banerjee, S., Akira, S., Takeda, K., Zychlinsky, A. Immunity (2000) [Pubmed]
 
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