Journal
TRENDS IN IMMUNOLOGY
Volume 32, Issue 3, Pages 110-116Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.it.2011.01.003
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Funding
- Netherlands Organization for Scientific Research
- NIH [AI-15614]
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Interleukin-1 beta (IL-1 beta) and IL-18 contribute to host defense against infection by augmenting antimicrobial properties of phagocytes and initiating Th1 and Th17 adaptive immune responses. Protein complexes called inflammasomes activate intracellular caspase-1 autocatalytically, which cleaves the inactive precursors of IL-1 beta and IL-18 into bioactive cytokines. In this review, we discuss the controversies regarding inflammasome activation and the role of the inflammasome during infection. We highlight alternative mechanisms for processing IL-1 beta and IL-18 during infection, which involve extracellular cleavage of the inactive cytokines by neutrophil-derived serine proteases or proteases released from cytotoxic T cells.
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