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Non-transcriptional regulation of NLRP3 inflammasome signaling by IL-4

Title
Non-transcriptional regulation of NLRP3 inflammasome signaling by IL-4
Authors
Inhwa Hwang;Jungmin Yang;Je-Wook Yu;Emad S Alnemri;Teresa Fernandes-Alnemri;Seung-Hyo Lee;Eun Ju Lee;Sujeong Hong
Issue Date
2015
Journal Title
Immunology and Cell Biology
ISSN
0818-9641
Citation
Immunology and Cell Biology, Vol.93(6) : 591~599, 2015
Abstract
Th2 cytokine IL-4 has been previously shown to suppress the production of proinflammatory cytokines in monocytes. However, the underlying molecular mechanism by which IL-4 signaling antagonizes proinflammatory responses is poorly characterized. In particular, whether IL-4 can modulate inflammasome signaling remains unknown. Here, we provide evidence that IL-4 suppresses NLRP3-dependent caspase-1 activation and the subsequent IL-1β secretion but does not inhibit absent in melanoma 2 (AIM2)- or NLRC4 (NOD-like receptor family, CARD domain-containing 4)-dependent caspase-1 activation in THP-1 and mouse bone marrow-derived macrophages. Upon lipopolysaccharide (LPS) or LPS/ATP stimulation, IL-4 markedly inhibited the assembly of NLRP3 inflammasome, including NLRP3-dependent ASC (apoptosis-associated speck-like protein containing a caspase recruitment domain) oligomerization, NLRP3-ASC interaction and NLRP3 speck-like oligomeric structure formation. The negative regulation of NLRP3 inflammasome by IL-4 was not due to the impaired mRNA or protein production of NLRP3 and proinflammatory cytokines. Supporting this observation, IL-4 attenuated NLRP3 inflammasome activation even in reconstituted NLRP3-expressing macrophages in which NLRP3 expression is not transcriptionally regulated by TLR-NF-κB signaling. Furthermore, the IL-4-mediated suppression of NLRP3 inflammasome was independent of STAT6-dependent transcription and mitochondrial reactive oxygen species (ROS). Instead, IL-4 inhibited subcellular redistribution of NLRP3 into mitochondria and microtubule polymerization upon NLRP3-activating stimulation. Our results collectively suggest that IL-4 could suppress NLRP3 inflammasome activation in a transcription-independent manner, thus providing an endogenous regulatory machinery to prevent excessive inflammasome activation.
URI
http://www.nature.com/icb/journal/v93/n6/full/icb2014125a.html

http://ir.ymlib.yonsei.ac.kr/handle/22282913/140552
DOI
10.1038/icb.2014.125
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Microbiology
Yonsei Authors
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