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Published on: April 13, 2018
Protocol for large-scale, high-yield, high-purity extracellular vesicle purification from human plasma
Saba Zanganeh1, Gabriel F Arias2, Allaura S Cone3
1Joint Department of Biomedical Engineering, The University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC 27599, USA; Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
This study introduces a new, scalable method for purifying extracellular vesicles (EVs) from human plasma without ultracentrifugation, improving their potential as biomarkers and drug delivery vehicles.
Area of Science:
- Biochemistry
- Biotechnology
- Nanomedicine
Background:
- Extracellular vesicles (EVs) show potential as biomarkers and for drug delivery.
- Current purification methods, like ultracentrifugation, are not scalable or efficient.
- Lack of effective purification limits broader clinical and research applications of EVs.
Purpose of the Study:
- To develop and present a novel, scalable protocol for purifying EVs from human plasma.
- To offer an alternative to ultracentrifugation for EV isolation.
- To enable robust biochemical, biophysical, and functional characterization of purified EVs.
Main Methods:
- Tangential flow filtration (TFF) for volume reduction.
- Polyethylene glycol (PEG)-based precipitation for EV enrichment.
- Nuclease treatment to remove contaminating nucleic acids.
- Multimodal and affinity chromatography for impurity removal.
Main Results:
- A detailed protocol for EV purification from human plasma is established.
- The method avoids the need for ultracentrifugation.
- The protocol includes comprehensive characterization steps for the purified EVs.
Conclusions:
- The presented protocol offers an effective and scalable method for EV purification from plasma.
- This advancement facilitates the wider use of EVs in diagnostics and therapeutics.
- The method supports standardized and reliable EV research.
