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Diehl JN, Ray A, Collins LB, Peterson A, Alexander KC, Boutros JG, Ikonomidis JS, Akerman AW. A standardized method for plasma extracellular vesicle isolation and size distribution analysis. PLoS One 2023; 18:e0284875. [PMID: 37115777 PMCID: PMC10146456 DOI: 10.1371/journal.pone.0284875] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
The following protocol describes our workflow for isolation and quantification of plasma extracellular vesicles (EVs). It requires limited sample volume so that the scientific value of specimens is maximized. These steps include isolation of vesicles by automated size exclusion chromatography and quantification by tunable resistive pulse sensing. This workflow optimizes reproducibility by minimizing variations in processing, handling, and storage of EVs. EVs have significant diagnostic and therapeutic potential, but clinical application is limited by disparate methods of data collection. This standardized protocol is scalable and ensures efficient recovery of physiologically intact EVs that may be used in a variety of downstream biochemical and functional analyses. Simultaneous measurement quantifies EV concentration and size distribution absolutely. Absolute quantification corrects for variations in EV number and size, offering a novel method of standardization in downstream applications.
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Affiliation(s)
- J Nathaniel Diehl
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Amelia Ray
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Lauren B Collins
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Andrew Peterson
- Department of Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- Division of Cardiothoracic Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Kyle C Alexander
- Department of Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- Division of Cardiothoracic Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Jacob G Boutros
- Campbell University School of Osteopathic Medicine, Lillington, North Carolina, United States of America
| | - John S Ikonomidis
- Department of Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- Division of Cardiothoracic Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
| | - Adam W Akerman
- Department of Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
- Division of Cardiothoracic Surgery, University of North Carolina-Chapel Hill, Chapel Hill, North Carolina, United States of America
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