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© A-M. Pais-Correia, M-I. Thoulouze, A. Alcover, A. Gessain
Mise en évidence de structures de type "biofilm ", formées par le rétrovirus HTLV-1 générés par des cellules infectées (cellules du haut), qui ont été transmis à un autre lymphocyte (cellule du bas). Micrographie en microscopie électronique à balayage. Image colorisée.
Publication : Cell metabolism

STING orchestrates the crosstalk between polyunsaturated fatty acid metabolism and inflammatory responses.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Cell metabolism - 04 Jan 2022

Vila IK, Chamma H, Steer A, Saccas M, Taffoni C, Turtoi E, Reinert LS, Hussain S, Marines J, Jin L, Bonnefont X, Hubert M, Schwartz O, Paludan SR, Van Simaeys G, Doumont G, Sobhian B, Vlachakis D, Turtoi A, Laguette N,

Link to Pubmed [PMID] – 34986331

Link to DOI – S1550-4131(21)00626-410.1016/j.cmet.2021.12.007

Cell Metab 2022 01; 34(1): 125-139.e8

Concerted alteration of immune and metabolic homeostasis underlies several inflammation-related pathologies, ranging from metabolic syndrome to infectious diseases. Here, we explored the coordination of nucleic acid-dependent inflammatory responses and metabolic homeostasis. We reveal that the STING (stimulator of interferon genes) protein regulates metabolic homeostasis through inhibition of the fatty acid desaturase 2 (FADS2) rate-limiting enzyme in polyunsaturated fatty acid (PUFA) desaturation. STING ablation and agonist-mediated degradation increased FADS2-associated desaturase activity and led to accumulation of PUFA derivatives that drive thermogenesis. STING agonists directly activated FADS2-dependent desaturation, promoting metabolic alterations. PUFAs in turn inhibited STING, thereby regulating antiviral responses and contributing to resolving STING-associated inflammation. Thus, we have unveiled a negative regulatory feedback loop between STING and FADS2 that fine-tunes inflammatory responses. Our results highlight the role of metabolic alterations in human pathologies associated with aberrant STING activation and STING-targeting therapies.

https://pubmed.ncbi.nlm.nih.gov/34986331