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BACKGROUND: Nucleic acids are potent stimulators of type I interferon (IFN-I) and antiviral defense, but may also promote pathological inflammation. A range of diseases are characterized by elevated IFN-I, including systemic lupus erythematosus (lupus). The DNA-activated cGAS-STING pathway is a major IFN-I-inducing pathway, and activation of signaling is dependent on trafficking of STING from the ER to the Golgi.
METHODS: Here we used cell culture systems, a mouse lupus model, and material from lupus patients, to explore the mode of action of a STING antagonistic peptide, and its ability to modulate disease processes.
FINDINGS: We report that the peptide ISD017 selectively inhibits all known down-stream activities of STING, including IFN-I, inflammatory cytokines, autophagy, and apoptosis. ISD017 blocks the essential trafficking of STING from the ER to Golgi through a mechanism dependent on the STING ER retention factor STIM1. Importantly, ISD017 blocks STING activity in vivo and ameliorates disease development in a mouse model for lupus. Finally, ISD017 treatment blocks pathological cytokine responses in cells from lupus patients with elevated IFN-I levels.
INTERPRETATION: These data hold promise for beneficial use of STING-targeting therapy in lupus.
FUNDING: The Novo Nordisk Foundation, The European Research Council, The Lundbeck Foundation, European Union under the Horizon 2020 Research, Deutsche Forschungsgemeinschaft, Chulalongkorn University.
Originalsprog | Engelsk |
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Artikelnummer | 103314 |
Tidsskrift | EBioMedicine |
Vol/bind | 66 |
Antal sider | 13 |
DOI | |
Status | Udgivet - jun. 2021 |
Copyright © 2021 The Author(s). Published by Elsevier B.V. All rights reserved.
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