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A Rapid and High-Recovery Extracellular Vesicle (EVs) Isolation Technique from Blood Samples
Aryan N Sankpal1, Narendra V Sankpal2
1Washington University in St Louis, MO, USA.
Bio-Protocol
|March 12, 2026
Summary
Researchers developed a simple, fast method to isolate extracellular vesicles (EVs) from small blood volumes. This technique yields concentrated EVs for biomarker discovery, aiding in early disease diagnosis and treatment monitoring.
Area of Science:
- Biotechnology
- Molecular Biology
- Biomarker Discovery
Background:
- Extracellular vesicles (EVs) in blood act as liquid biopsies, reflecting cellular states and holding diagnostic potential.
- Current EV isolation methods like ultracentrifugation, size exclusion chromatography, and immunoaffinity capture have limitations.
- Efficient EV isolation is critical for biomarker discovery in diseases like cancer and neurological disorders, and for monitoring organ transplantation.
Purpose of the Study:
- To present a simplified, rapid, and reproducible method for isolating extracellular vesicles (EVs) from small blood samples.
- To enable direct downstream analysis of EVs for biomarker identification and disease monitoring.
- To provide a cost-effective and scalable EV isolation protocol adaptable for various downstream applications.
Main Methods:
- Utilized Ficoll-isolated plasma or centrifuged serum from human, porcine, and murine blood samples (50-200 μL).
- Developed a simplified protocol for rapid EV pellet concentration, yielding 50-300 nm EVs.
- Validated the method's reproducibility and efficiency for downstream analyses like Western blotting.
Main Results:
- The protocol consistently isolates a concentrated pellet of 50-300 nm EVs, enriched with relevant markers and nucleic acids.
- The method is fast, easy to handle, and requires fewer technical steps compared to traditional techniques.
- Isolated EVs are suitable for direct downstream analysis and can be further purified or enriched.
Conclusions:
- This novel, simplified EV isolation method offers a rapid and reproducible approach for biomarker discovery from small blood volumes.
- The protocol's adaptability, cost-effectiveness, and scalability make it valuable for clinical applications in diagnostics and prognostics.
- This technique facilitates the identification of EV-based biomarkers for predicting outcomes, particularly in organ transplantation.
