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Updated: Jun 15, 2026
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Isolation and Analysis of Traceable and Functionalized Extracellular Vesicles from the Plasma and Solid Tissues
Published on: October 17, 2022
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Comparative Analysis of Plasma Extracellular Vesicle Isolation Methods for Purity Assessment and Biomarker Discovery
Alexandra T Star1,2, Melissa Hewitt1, Amanpreet Badhwar3
1Human Health Therapeutics Research Centre, National Research Council of Canada, Ottawa, ON K1A 0R6, Canada.
Proteomes
|September 22, 2025
Summary
Size-exclusion chromatography (SEC) offers the purest extracellular vesicle (EV) isolation from plasma for proteomics. This method enhances EV marker detection and minimizes protein contamination, improving biomarker discovery and therapeutic development.
Area of Science:
- Biochemistry
- Molecular Biology
- Biotechnology
Background:
- Extracellular vesicles (EVs) are crucial blood biomarkers and therapeutic agents.
- Ensuring EV purity is vital for proteomics and biomanufacturing.
- Evaluating EV isolation methods is key for reliable downstream applications.
Purpose of the Study:
- To systematically compare various EV isolation techniques from human plasma.
- To develop a robust scoring system for assessing EV preparation purity.
- To identify the optimal method for EV isolation for proteomics applications.
Main Methods:
- Compared size-exclusion chromatography (SEC) and precipitation methods against plasma.
- Assessed particle yield, size, proteomic overlap, and protein depletion.
- Utilized parallel reaction monitoring (PRM) mass spectrometry for purity assessment.
Main Results:
- SEC demonstrated superior enrichment of EV markers and unique proteins.
- SEC exhibited the lowest levels of contaminating plasma proteins.
- SEC achieved the highest purity scores and enabled detection of EV-free proteins.
Conclusions:
- SEC yields the most EV-enriched plasma isolates for proteomics, with minimal contamination.
- PRM-based purity scoring provides an objective benchmark for EV preparations.
- Standardized EV isolation quality is achievable for biomarker discovery and manufacturing.
