A type VI secretion system in species and triggers distinct macrophage death pathways independent of the pyrin inflammasome.

The complex contains opportunistic pathogens that cause chronic infections and inflammation in the lungs of people with cystic fibrosis. Two closely related species within this complex are and the recently classified and encode a type VI secretion system and the effector TecA, which is detected by the pyrin/caspase-1 inflammasome, and triggers macrophage inflammatory death. We previously showed that the pyrin inflammasome was dispensable for lung inflammation in mice infected with AU1054 indicating this species activates an alternative pathway of macrophage inflammatory death.

A Type VI Secretion System in Species and Triggers Distinct Macrophage Death Pathways Independent of the Pyrin Inflammasome.

The complex contains opportunistic pathogens that cause chronic infections and inflammation in lungs of people with cystic fibrosis. Two closely related species within this complex are and the recently classified and encode a type VI secretion system and the effector TecA, which is detected by the pyrin/caspase-1 inflammasome, and triggers macrophage inflammatory death. In our earlier study the pyrin inflammasome was dispensable for lung inflammation in mice infected with AU1054, indicating this species activates an alternative pathway of macrophage inflammatory death.