Abstract
Inflammasomes are large multiprotein complexes that assemble mainly in innate immune cells after detection of microbial or sterile insults. Activation of inflammasomes is a key proinflammatory event during infection, and many pathogens have evolved specific evasion mechanisms to evade or inhibit inflammasome activation. One such pathogen is the common bacterium group A Streptococcus (GAS), which causes a wide range of diseases of varying severity. GAS secretes a multitude of virulence factors whereof the pore-forming protein streptolysin O (SLO) is the main inflammasome activation determinant. Here we provide a protocol for reliable evaluation of inflammasome activation in murine bone marrow-derived macrophages (BMDM) infected with GAS, including instructions for generating BMDMs and growing the bacterium. This protocol can easily be modified to other bacterial pathogens, or human macrophages.
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