Qu Xiusheng, Wang Qingdong, Qiu Hongbin
Key laboratory of Microecology-immune Regulatory Network and Related Diseases, School of Basic Medicine, Jiamusi University, Jiamusi, Heilongjiang Province, P.R. China.
Genes Immun. 2025 Jul 1. doi: 10.1038/s41435-025-00341-7.
Gouty arthritis (GA) is a common inflammatory disease which has no effective treatments. Pyroptosis has been reported to exacerbate the progression of GA. We aimed to explore the molecular mechanism by which S-nitrosylated NEDD4 accelerates GA progression by regulating pyroptosis. In our study, we found NOD1 knockdown inhibited pyroptosis and reduced c-Caspase-1, NLRP3, ASC, and GSDMD-N expression, IL-1β and IL-18 levels, and XOD activity in GA in vivo and in vitro. In addition, NOD1 knockdown alleviated inflammatory symptoms of joint tissues in GA mice model. Moreover, downregulation of NEDD4 caused by S-nitrosylation modification at C365 site upregulated NOD1 expression by reducing ubiquitination and degradation of NOD1. Furthermore, iNOS promoted NOD1 expression by mediating S-nitrosylation of NEDD4 thereby inducing GA in vitro. In conclusion, S-nitrosylation of NEDD4 promoted NLRP3-mediated pyroptosis by upregulating NOD1 expression, which ultimately accelerated the development of GA. We are the first to report the expression patterns of NEDD4 and NOD1 in GA, and demonstrated firstly that S-nitrosylation of NEDD4 inhibited ubiquitination-mediated degradation of NOD1, thereby modulating pyroptosis in GA. By elucidating how S-nitrosylation of NEDD4 orchestrates NOD1-mediated pyroptosis, this work opens avenues for developing first-in-class therapies for GA.
痛风性关节炎(GA)是一种常见的炎症性疾病,目前尚无有效的治疗方法。据报道,细胞焦亡会加剧GA的进展。我们旨在探索S-亚硝基化的NEDD4通过调节细胞焦亡加速GA进展的分子机制。在我们的研究中,我们发现敲低NOD1可抑制细胞焦亡,并降低GA体内和体外模型中c-半胱天冬酶-1、NLRP3、ASC和GSDMD-N的表达、IL-1β和IL-18水平以及XOD活性。此外,敲低NOD1可减轻GA小鼠模型关节组织的炎症症状。此外,C365位点的S-亚硝基化修饰导致的NEDD4下调通过减少NOD1的泛素化和降解上调了NOD1的表达。此外,iNOS通过介导NEDD4的S-亚硝基化促进NOD1表达,从而在体外诱导GA。总之,NEDD4的S-亚硝基化通过上调NOD1表达促进NLRP3介导的细胞焦亡,最终加速了GA的发展。我们首次报道了NEDD4和NOD1在GA中的表达模式,并首先证明NEDD4的S-亚硝基化抑制了泛素化介导的NOD1降解,从而调节GA中的细胞焦亡。通过阐明NEDD4的S-亚硝基化如何协调NOD1介导的细胞焦亡,这项工作为开发GA的一流疗法开辟了道路。
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