Alarming cargo: The role of exosomes in trauma-induced inflammation

Sarah A. Walsh, Benjamin W. Hoyt, Cassie J. Rowe, Devaveena Dey, Thomas A. Davis*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

22 Scopus citations


Severe polytraumatic injury initiates a robust immune response. Broad immune dysfunction in patients with such injuries has been well-documented; however, early biomarkers of immune dysfunction post-injury, which are critical for comprehensive intervention and can predict the clinical course of patients, have not been reported. Current circulating markers such as IL-6 and IL-10 are broad, non-specific, and lag behind the clinical course of patients. General blockade of the inflammatory response is detrimental to patients, as a certain degree of regulated inflammation is critical and necessary following trauma. Exosomes, small membrane-bound extracellular vesicles, found in a variety of biofluids, carry within them a complex functional cargo, comprised of coding and non-coding RNAs, proteins, and metabolites. Composition of circulating exosomal cargo is modulated by changes in the intra-and extracellular microenvironment, thereby serving as a homeostasis sensor. With its extensively documented involvement in immune regulation in multiple pathologies, study of exosomal cargo in polytrauma patients can provide critical insights on trauma-specific, temporal immune dysregulation, with tremendous potential to serve as unique biomarkers and therapeutic targets for timely and precise intervention.

Original languageEnglish
Article number522
Issue number4
StatePublished - Apr 2021
Externally publishedYes


  • Exosomes
  • Extracellular vesicles
  • Inflammation
  • Intercellular communication
  • Trauma


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