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RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis

BACKGROUNDS: The stimulator of interferon genes (STING) is an important driver in various inflammatory diseases. METHODS AND RESULTS: Here, we have demonstrated that inhibition of RIPK3 and MLKL dampens STING signaling, indicating that necroptosis may be involved in sustaining STING signaling. Furth...

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Detalles Bibliográficos
Autores principales: Zhang, Xufei, Wu, Jie, Liu, Qinjie, Li, Xuanheng, Yang, Yiyu, Wu, Lei, Wu, Xiuwen, Zhao, Yun, Ren, Jianan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10359592/
https://www.ncbi.nlm.nih.gov/pubmed/37475188
http://dx.doi.org/10.1002/ctm2.1334
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author Zhang, Xufei
Wu, Jie
Liu, Qinjie
Li, Xuanheng
Yang, Yiyu
Wu, Lei
Wu, Xiuwen
Zhao, Yun
Ren, Jianan
author_facet Zhang, Xufei
Wu, Jie
Liu, Qinjie
Li, Xuanheng
Yang, Yiyu
Wu, Lei
Wu, Xiuwen
Zhao, Yun
Ren, Jianan
author_sort Zhang, Xufei
collection PubMed
description BACKGROUNDS: The stimulator of interferon genes (STING) is an important driver in various inflammatory diseases. METHODS AND RESULTS: Here, we have demonstrated that inhibition of RIPK3 and MLKL dampens STING signaling, indicating that necroptosis may be involved in sustaining STING signaling. Furthermore, RIPK3 knockout in HT‐29 cells significantly suppressed STING signaling. Mechanistically, RIPK3 inhibits autophagic flux during STING activation. RIPK3 knockout inhibits STING signaling by intensifying STING autophagy. In contrast, MLKL regulates the STING pathway bidirectionally. MLKL deficiency enhances STING signaling, whereas suppression of MLKL‐mediated pore formation restricts STING signaling. Mechanistically, upon abrogating the pro‐necroptotic activity of MLKL, MLKL bound to activated STING is secreted to the extracellular space, where it restricts TBK1 and IRF3 recruitment. Targeting necroptotic signaling ameliorates STING activation during DMXAA‐induced intestinal injury and sepsis. CONCLUSIONS: These findings elucidate molecular mechanisms linking necroptosis to the STING pathway, and suggest a potential benefit of therapeutic targeting of necroptosis in STING‐driven inflammatory diseases.
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spelling pubmed-103595922023-07-22 RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis Zhang, Xufei Wu, Jie Liu, Qinjie Li, Xuanheng Yang, Yiyu Wu, Lei Wu, Xiuwen Zhao, Yun Ren, Jianan Clin Transl Med Research Articles BACKGROUNDS: The stimulator of interferon genes (STING) is an important driver in various inflammatory diseases. METHODS AND RESULTS: Here, we have demonstrated that inhibition of RIPK3 and MLKL dampens STING signaling, indicating that necroptosis may be involved in sustaining STING signaling. Furthermore, RIPK3 knockout in HT‐29 cells significantly suppressed STING signaling. Mechanistically, RIPK3 inhibits autophagic flux during STING activation. RIPK3 knockout inhibits STING signaling by intensifying STING autophagy. In contrast, MLKL regulates the STING pathway bidirectionally. MLKL deficiency enhances STING signaling, whereas suppression of MLKL‐mediated pore formation restricts STING signaling. Mechanistically, upon abrogating the pro‐necroptotic activity of MLKL, MLKL bound to activated STING is secreted to the extracellular space, where it restricts TBK1 and IRF3 recruitment. Targeting necroptotic signaling ameliorates STING activation during DMXAA‐induced intestinal injury and sepsis. CONCLUSIONS: These findings elucidate molecular mechanisms linking necroptosis to the STING pathway, and suggest a potential benefit of therapeutic targeting of necroptosis in STING‐driven inflammatory diseases. John Wiley and Sons Inc. 2023-07-20 /pmc/articles/PMC10359592/ /pubmed/37475188 http://dx.doi.org/10.1002/ctm2.1334 Text en © 2023 The Authors. Clinical and Translational Medicine published by John Wiley & Sons Australia, Ltd on behalf of Shanghai Institute of Clinical Bioinformatics. https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Zhang, Xufei
Wu, Jie
Liu, Qinjie
Li, Xuanheng
Yang, Yiyu
Wu, Lei
Wu, Xiuwen
Zhao, Yun
Ren, Jianan
RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title_full RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title_fullStr RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title_full_unstemmed RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title_short RIPK3–MLKL necroptotic signalling amplifies STING pathway and exacerbates lethal sepsis
title_sort ripk3–mlkl necroptotic signalling amplifies sting pathway and exacerbates lethal sepsis
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10359592/
https://www.ncbi.nlm.nih.gov/pubmed/37475188
http://dx.doi.org/10.1002/ctm2.1334
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