Mitigation of influenza-mediated inflammation by immunomodulatory matrix-bound nanovesicles

Raphael J. Crum, Brydie R. Huckestien, Gaelen Dwyer, Lisa Mathews, David G. Nascari, George S. Hussey, Heth R. Turnquist, John F. Alcorn, Stephen F. Badylak*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Cytokine storm describes a life-threatening, systemic inflammatory syndrome characterized by elevated levels of proinflammatory cytokines and immune cell hyperactivation associated with multi-organ dysfunction. Matrix-bound nanovesicles (MBV) are a subclass of extracellular vesicle shown to down-regulate proinflammatory immune responses. The objective of this study was to assess the efficacy of MBV in mediating influenzainduced acute respiratory distress syndrome and cytokine storm in a murine model. Intravenous administration of MBV decreased influenza-mediated total lung inflammatory cell density, proinflammatory macrophage frequencies, and proinflammatory cytokines at 7 and 21 days following viral inoculation. MBV decreased longlasting alveolitis and the proportion of lung undergoing inflammatory tissue repair at day 21. MBV increased the proportion of activated anti-viral CD4+ and CD8+ T cells at day 7 and memory-like CD62L+ CD44+, CD4+, and CD8+ T cells at day 21. These results show immunomodulatory properties of MBV that may benefit the treatment of viral-mediated pulmonary inflammation with applicability to other viral diseases such as SARS-CoV-2.

Original languageEnglish
Article numbereadf9016
JournalScience Advances
Issue number20
StatePublished - 2023
Externally publishedYes


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