Pathogen blockade of TAK1 triggers caspase-8–dependent cleavage of gasdermin D and cell death
2018; American Association for the Advancement of Science; Volume: 362; Issue: 6418 Linguagem: Inglês
10.1126/science.aau2818
ISSN1095-9203
AutoresPontus Ørning, Dan Weng, Kristian K. Starheim, Dmitry Ratner, Zachary Best, Bettina Lee, Alexandria Brooks, Shiyu Xia, Hao Wu, Michelle A. Kelliher, Scott B. Berger, Peter J. Gough, John Bertin, Megan K. Proulx, Jon D. Goguen, Nobuhiko Kayagaki, Katherine A. Fitzgerald, Egil Lien,
Tópico(s)interferon and immune responses
ResumoCaspase-8 is a player in pyroptosis The activation of certain pattern-recognition receptors by pathogen-associated molecular patterns results in the formation of inflammasome complexes. Inflammasome complexes can initiate both the maturation of inflammatory cytokines and pyroptotic cell death via the caspase-mediated cleavage of gasdermin D (GSDMD). As of now, the only known regulators of GSDMD in macrophages are caspase-1 and caspase-11. Orning et al. report an additional pathway controlling GSDMD processing. YopJ, an effector molecule produced by Yersinia (the causative agent of plague), inhibits TAK1–IκB kinase signaling. This, in turn, results in caspase-8–directed cleavage of GSDMD, pyroptosis, and the release of interleukin 1β (IL-1β) and IL-18. Thus, in the arms race between host and pathogen, the host recognizes signaling disturbances as pathogenic and counters with inflammation and cell death. Science , this issue p. 1064
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