Vps4B controls caspase-1 dynamics at the ASC speck to drive inflammasome activation.

Vps4B facilitates continuous caspase-1 recruitment and activation at the ASC speck, promoting inflammasome function and host defense in vivo.

• Why it matters: Understanding how caspase-1 is recruited and activated within the inflammasome is crucial for developing targeted therapies for inflammatory diseases.
• What they did: The study used endogenous interaction assays and structural analysis to show that Vps4B interacts with ASC and caspase-1, forming a ring-like structure that disassembles caspase-1 CARD domains, enabling ongoing activation.
• The result: This self-rejuvenating inflammasome process enhances host defense against Listeria and maintains blood-brain barrier integrity, suggesting new therapeutic avenues for inflammatory conditions.