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ZAP facilitates NLRP3 inflammasome activation via promoting the oligomerization of NLRP3.
International Immunopharmacology 2024 April 25
The NOD-like receptor family protein 3 (NLRP3) inflammasome is a crucial complex for the host to establish inflammatory immune responses and plays vital roles in a series of disorders, including Alzheimer's disease and acute peritonitis. However, its regulatory mechanism remains largely unclear. Zinc finger antiviral protein (ZAP), also known as zinc finger CCCH-type antiviral protein 1 (ZC3HAV1), promotes viral RNA degradation and plays vital roles in host antiviral immune responses. However, the role of ZAP in inflammation, especially in NLRP3 activation, is unclear. Here, we show that ZAP interacts with NLRP3 and promotes NLRP3 oligomerization, thus facilitating NLRP3 inflammasome activation in peritoneal macrophages of C57BL/6 mice. The shorter isoform of ZAP (ZAPS) appears to play a greater role than the full-length isoform (ZAPL) in HEK293T cells. Congruously, Zap-deficient C57BL/6 mice may be less susceptible to alum-induced peritonitis and lipopolysaccharide-induced sepsis in vivo. Therefore, we propose that ZAP is a positive regulator of NLRP3 activation and a potential therapeutic target for NLRP3-related inflammatory disorders.
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