Gasdermin D: the long-awaited executioner of pyroptosis

Area of Science:

• Cellular biology
• Immunology
• Molecular mechanisms of cell death

Background:

• Inflammatory caspases mediate pyroptosis, a programmed lytic cell death pathway.
• Pyroptosis is activated by microbial infections and damage-associated signals.
• The precise role of substrate cleavage in pyroptosis initiation requires further elucidation.

Purpose of the Study:

• To investigate the role of gasdermin D cleavage in pyroptosis.
• To confirm the necessity of inflammatory caspase-mediated gasdermin D cleavage for pyroptosis.

Main Methods:

• Analysis of inflammatory caspase activity.
• Assessment of gasdermin D cleavage products.
• Monitoring of cell death markers.

Main Results:

• Two independent studies demonstrate that cleavage of gasdermin D is a critical step.
• Inflammatory caspases directly cleave gasdermin D.
• This cleavage event is indispensable for the execution of pyroptosis.

Conclusions:

• Gasdermin D cleavage by inflammatory caspases is a prerequisite for pyroptosis.
• This finding solidifies the molecular pathway linking inflammatory caspases to lytic cell death.