Abstract
Vitamin K refers to a group of structurally similar vitamins that are essential for proper blood coagulation, as well as bone and cardiovascular health. Previous studies have indicated that vitamin K may also have anti-inflammatory properties, although the underlying mechanisms of its anti-inflammatory effects remain unclear. The NLRP3 inflammasome is a multiprotein complex, and its activation leads to IL-1β and IL-18 secretion and contributes to the pathogenesis of various human inflammatory diseases. Here, we show that synthetic vitamins K3 and K4 are selective, potent inhibitors of the NLRP3 inflammasome and specifically block the interaction between NLRP3 and ASC, thereby inhibiting NLRP3 inflammasome assembly. Moreover, we show that treatment with vitamin K3 or K4 attenuates the severity of inflammation in a mouse model of peritonitis. Our results demonstrate that vitamins K3 and K4 exert their anti-inflammatory effects by inhibiting NLRP3 inflammasome activation and indicate that vitamin K supplementation may be a treatment option for NLRP3-associated inflammatory diseases.
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Acknowledgements
This research was supported by the National Key Research and Development Program of China (grant number 2019YFA0508503), the Strategic Priority Research Program of the Chinese Academy of Sciences (grant number XDB29030102), the National Natural Science Foundation of China (grant numbers 81701549, 91742202, 81525013, 81722022, and 81821001), the Young Talent Support Program and Fundamental Research Funds for the Central Universities and the University Synergy Innovation Program of Anhui Province (GXXT-2019-026).
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C.Z., Y.H., B.H., Y.C., and X.W. performed the experiments. R.Z., X.W., T.G., and W.J. designed the research. T.G., W.J., and R.Z. wrote the manuscript. W.J. supervised the project.
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Zheng, X., Hou, Y., He, H. et al. Synthetic vitamin K analogs inhibit inflammation by targeting the NLRP3 inflammasome. Cell Mol Immunol 18, 2422–2430 (2021). https://doi.org/10.1038/s41423-020-00545-z
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DOI: https://doi.org/10.1038/s41423-020-00545-z