The Inflammasome Drives GSDMD-Independent Secondary Pyroptosis and IL-1 Release in the Absence of Caspase-1 Protease Activity

Authors: Katharina S. Schneider, Christina J. Groß, Roland F. Dreier, Benedikt S. Saller, Ritu Mishra, Oliver Gorka, Rosalie Heilig, Étienne Meunier, Mathias S. Dick, Tamara Ćiković, Jan Sodenkamp, Guillaume Médard, Ronald Naumann, Jürgen Ruland, Bernhard Küster, Petr Brož, Olaf Groß - Cell Reports 2017 cited by 296

, we found that GSDMD-dependent pyroptosis prevented caspase-8 activation at the inflammasome. In the absence of GSDMD-dependent pyroptosis, the inflammasome engaged a delayed, alternative form of lytic cell death that was accompanied by the release of large amounts of mature IL-1 and contributed to host protection. Features of this cell death modality distinguished it from apoptosis, suggesting it may represent a distinct form of pro-inflammatory regulated necrosis.