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Burn Injury Rewires Immune and Neuronal Extracellular Vesicle Communication
Kristin N Grimsrud1,2, Tajia Green2, Yirui Tang1
1Department of Pathology and Laboratory Medicine, School of Medicine, University of California, Davis, Sacramento, CA.
Annals of Surgery
|July 29, 2026
Summary
Burn injury significantly alters proteins within extracellular vesicles (EVs), impacting immune and neural communication. These EV changes offer potential biomarkers for improved burn patient diagnostics and therapeutics.
Area of Science:
- Biochemistry
- Immunology
- Neuroscience
Background:
- Severe burn injury induces systemic inflammation and metabolic dysfunction.
- Extracellular vesicles (EVs) are key mediators of intercellular communication, influencing inflammation, metabolism, and neuronal signaling.
- EV protein cargo may reflect burn-induced physiological alterations.
Purpose of the Study:
- To investigate alterations in extracellular vesicle (EV) protein profiles following burn injury.
- To identify molecular pathways involved in immune-neural communication in burn pathophysiology.
- To explore the potential of EVs as diagnostic and therapeutic biomarkers in burn care.
Main Methods:
- Plasma EVs were isolated from burn patients (n=37) and nonburn controls (n=21).
- Proteomic profiling was performed on EVs, with functional enrichment analyses including Gene Ontology (GO) and Ingenuity Pathway Analysis (IPA).
- Cell type-specific EV enrichment was conducted on a subset for exploratory analysis.
Main Results:
- Burn injury significantly altered EV proteomic profiles, with 593 proteins increased and 326 decreased.
- Key proteins distinguishing burn patients included CRP, ITGA11, MYH9, CALR, and ANTXR2.
- Enrichment analyses revealed significant alterations in immune activation, inflammatory regulation, coagulation, and cellular stress pathways.
Conclusions:
- Burn injury profoundly impacts EV protein cargo, reflecting proinflammatory and neuroimmune signaling.
- Coordinated EV remodeling suggests a role in hyperinflammatory responses and altered healing processes.
- EVs hold promise as biomarkers for improved diagnostics and therapeutics in burn management.
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