CARD-only Proteins Regulate In vivo Inflammasome Responses and Ameliorate Gout
Overview
Cell Biology
Molecular Biology
Authors
Affiliations
Inflammatory responses are crucial for controlling infections and initiating tissue repair. However, excessive and uncontrolled inflammation causes inflammatory disease. Processing and release of the pro-inflammatory cytokines interleukin-1β (IL-1β) and IL-18 depend on caspase-1 activation within inflammasomes. Assembly of inflammasomes is initiated upon activation of cytosolic pattern recognition receptors (PRRs), followed by sequential polymerization of pyrin domain (PYD)-containing and caspase recruitment domain (CARD)-containing proteins mediated by homotypic PYD and CARD interactions. Small PYD- or CARD-only proteins (POPs and COPs, respectively) evolved in higher primates to target these crucial interactions to limit inflammation. Here, we show the ability of COPs to regulate inflammasome activation by modulating homotypic CARD-CARD interactions in vitro and in vivo. CARD16, CARD17, and CARD18 displace crucial CARD interactions between caspase-1 proteins through competitive binding and ameliorate uric acid crystal-mediated NLRP3 inflammasome activation and inflammatory disease. COPs therefore represent an important family of inflammasome regulators and ameliorate inflammatory disease.
Inflammasomes and idiopathic inflammatory myopathies.
Sun R, Chu J, Li P Front Immunol. 2024; 15:1449969.
PMID: 39723212 PMC: 11668653. DOI: 10.3389/fimmu.2024.1449969.
CARD16 restores tumorigenesis and restraints apoptosis in glioma cells Via FOXO1/TRAIL axis.
Xuan R, Hu T, Cai L, Zhao B, Han E, Xia Z Cell Death Dis. 2024; 15(11):804.
PMID: 39516471 PMC: 11549220. DOI: 10.1038/s41419-024-07196-2.
Cytoplasmic DNA and AIM2 inflammasome in RA: where they come from and where they go?.
Xu C, Jing W, Liu C, Yuan B, Zhang X, Liu L Front Immunol. 2024; 15:1343325.
PMID: 39450183 PMC: 11499118. DOI: 10.3389/fimmu.2024.1343325.
Evolutionary Dynamics of Proinflammatory Caspases in Primates and Rodents.
Holland M, Rutkowski R, C Levin T Mol Biol Evol. 2024; 41(12).
PMID: 39431598 PMC: 11630849. DOI: 10.1093/molbev/msae220.
Evolutionary dynamics of pro-inflammatory caspases in primates and rodents.
Holland M, Rutkowski R, C Levin T bioRxiv. 2024; .
PMID: 39253439 PMC: 11383037. DOI: 10.1101/2024.06.19.599744.