Abstract
STING (also known as MITA) is an adaptor protein that mediates cytoplasmic DNA-triggered signaling, and aberrant activation of STING/MITA by cytosolic self-DNA or gain-of-function mutations causes severe inflammation. Here, we show that STING-mediated inflammation and autoimmunity are promoted by RNF115 and alleviated by the RNF115 inhibitor disulfiram (DSF). Knockout of RNF115 or treatment with DSF significantly inhibit systemic inflammation and autoimmune lethality and restore immune cell development in Trex1–/– mice and STINGN153S/WT bone marrow chimeric mice. In addition, knockdown or pharmacological inhibition of RNF115 substantially downregulate the expression of IFN-α, IFN-γ and proinflammatory cytokines in PBMCs from patients with systemic lupus erythematosus (SLE) who exhibit high concentrations of dsDNA in peripheral blood. Mechanistically, knockout or inhibition of RNF115 impair the oligomerization and Golgi localization of STING in various types of cells transfected with cGAMP and in organs and cells from Trex1–/– mice. Interestingly, knockout of RNF115 inhibits the activation and Golgi localization of STINGN153S as well as the expression of proinflammatory cytokines in myeloid cells but not in endothelial cells or fibroblasts. Taken together, these findings highlight the RNF115-mediated cell type-specific regulation of STING and STINGN153S and provide potential targeted intervention strategies for STING-related autoimmune diseases.
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Data availability
All the other data supporting the findings of this study within the article and its Supplementary Information files are available from the corresponding author upon reasonable request. A reporting summary for this article is available as a Supplementary Information file.
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Acknowledgements
We thank Dr. Haojian Zhang (Wuhan University) for the reagents and the members of the Zhong laboratory and the core facilities of the Medical Research Institute for their technical help. This study was supported by grants from the National Key Research and Development Program of China (Grant Nos. 2022YFC3401500 and 2023YFC2306100), the Natural Science Foundation of China (Grant Nos. 31930040, 32070900, 82000670, 32270951, 32200710, and 823B1006), the Fundamental Research Funds for the Central Universities (Grant Nos. 2042022kf1187, 2042022kf1123 and 2042022dx0003), the Major Scientific and Technological Project of Hubei Province (Grant No. 2022ACA005), the Translational Medicine and Interdisciplinary Research Joint Found of Zhongnan Hospital of Wuhan University (Grant. No. ZNJC202218), and the Non-Profit Central Research Institute Fund of the Chinese Academy of Medical Sciences (Grant No. 2020PT320-004).
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BZ, DL, and XC designed and supervised the study; ZDZ performed the experiments; CRS, FXL, XSYLL and TCX helped with the mouse experiments; HG performed mass spectrometry analysis. YHW, QHZ, MC, and XC collected peripheral blood from the healthy donors and SLE patients; BZ, DL, and ZDZ wrote the paper. All the authors analyzed the data.
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Zhang, ZD., Shi, CR., Li, FX. et al. Disulfiram ameliorates STING/MITA-dependent inflammation and autoimmunity by targeting RNF115. Cell Mol Immunol 21, 275–291 (2024). https://doi.org/10.1038/s41423-024-01131-3
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DOI: https://doi.org/10.1038/s41423-024-01131-3