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The role of extracellular vesicle fusion with target cells in triggering systemic inflammation

P. Papareddy, I. Tapken, K. Kroh, RK. Varma Bhongir, M. Rahman, M. Baumgarten, EI. Cim, L. Györffy, E. Smeds, A. Neumann, S. Veerla, J. Olinder, H. Thorlacus, C. Ryden, E. Bartakova, M. Holub, H. Herwald

. 2024 ; 15 (1) : 1150. [pub] 20240207

Language English Country England, Great Britain

Document type Journal Article

Persistent link   https://www.medvik.cz/link/bmc24007182

Grant support
20180506 and 202110908 Crafoordska Stiftelsen (Crafoord Foundation)
2019-01086 Vetenskapsrådet (Swedish Research Council)

Extracellular vesicles (EVs) play a crucial role in intercellular communication by transferring bioactive molecules from donor to recipient cells. As a result, EV fusion leads to the modulation of cellular functions and has an impact on both physiological and pathological processes in the recipient cell. This study explores the impact of EV fusion on cellular responses to inflammatory signaling. Our findings reveal that fusion renders non-responsive cells susceptible to inflammatory signaling, as evidenced by increased NF-κB activation and the release of inflammatory mediators. Syntaxin-binding protein 1 is essential for the merge and activation of intracellular signaling. Subsequent analysis show that EVs transfer their functionally active receptors to target cells, making them prone to an otherwise unresponsive state. EVs in complex with their agonist, require no further stimulation of the target cells to trigger mobilization of NF-κB. While receptor antagonists were unable to inhibit NF-κB activation, blocking of the fusion between EVs and their target cells with heparin mitigated inflammation in mice challenged with EVs.

References provided by Crossref.org

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