[7][13] Caspase-1, normally in its physiologically inactive zymogen form, autoactivates when it is assembled into the filamentous inflammasome complex by autoproteolysis into the p10 and p20 subunits.
This allows the cell to have varying degrees of inflammatory responses based on the severity of the danger signal received.
Owing to the importance of CARD-CARD interactions in inflammasome formation, many COPs are known inhibitors of Caspase activation.
[13] Once matured, the cytokines initiate downstream signaling events to induce a proinflammatory response as well as to activate the expression of antiviral genes.
[24] The mature cytokines themselves do not contain the necessary sorting sequences to enter the ER–Golgi secretory pathway, and thus are not excreted from the cell by conventional methods.
However, it is theorized that the release of these proinflammatory cytokines is not reliant on cellular rupture via pyroptosis, and is in fact, an active process.
The fact that for many cell types, the cytokines are secreted despite them showing absolutely no signs of pyroptosis, supports this hypothesis.
[17] In order to induce pyroptosis, Caspase-1 cleaves Gasdermin D into fragments that form pores in the plasma membrane.