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Protein Digestion, Ultrafiltration, and Size Exclusion Chromatography to Optimize the Isolation of Exosomes from Human Blood Plasma and Serum
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Chapters
- 00:04Title
- 01:06Preparation of Crude Sample (Either Plasma or Serum) by Pelleting Larger Vesicles and Cellular Debris
- 02:04Digestion of Non-exosomal Blood Proteins and Removal of Small Proteins/Peptides by Centrifuge Ultrafiltration
- 04:21Purification of Vesicles by Size Exclusion Chromatography (SEC)
- 05:45Concentration of Purified Exosomes/Total Protein Quantification and Quantification/Sizing of Exosomes by Nanoparticle Tracking Analysis (NTA)
- 07:09Results: Increased Vesicle Yield and Exosome-specific Markers After Purification
- 08:15Conclusion
Here, we present a protocol to purify exosomes from both plasma and serum with reduced co-purification of non-exosomal blood proteins. The optimized protocol includes ultrafiltration, protease treatment, and size exclusion chromatography. Enhanced purification of exosomes benefits downstream analyses, including more accurate quantification of vesicles and proteomic characterization.
