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Assessment of Extracellular Vesicles Purity Using Proteomic Standards
Tingting Wang1,2, Kyle W Anderson1,2, Illarion V Turko1,2
1Biomolecular Measurement Division, National Institute of Standards and Technology , Gaithersburg, Maryland 20899, United States.
Analytical Chemistry
|September 27, 2017
Summary
Researchers developed a new method using mass spectrometry to assess the purity of extracellular vesicles (EVs) preparations. This technique accurately quantifies EV and non-EV proteins, addressing a key challenge in EV isolation and analysis for disease research.
Area of Science:
- Biochemistry
- Cell Biology
- Nanotechnology
Background:
- Extracellular vesicles (EVs) are crucial for intercellular communication, carrying proteins and nucleic acids.
- EVs are implicated in the development of various human diseases.
- Current EV isolation methods lack purity assessment, hindering accurate cargo analysis.
Purpose of the Study:
- To develop a quantitative method for assessing the purity of extracellular vesicle (EV) preparations.
- To address the challenge of separating EVs from non-EV contaminants in isolation protocols.
- To evaluate polymer-based precipitation techniques against ultracentrifugation for EV isolation.
Main Methods:
- Utilized multiple reaction monitoring (MRM) assay with internal standards.
- Quantified specific EV and non-EV proteins to determine purity.
- Compared polymer-based precipitation methods with traditional ultracentrifugation.
Main Results:
- The MRM assay provides a suitable approach for assessing EV preparation purity.
- Demonstrated the ability to quantify both EV and non-EV proteins.
- Evaluated and compared different EV isolation techniques.
Conclusions:
- A quantitative purity assessment method is essential for advancing EV isolation protocols.
- MRM assays offer a promising solution for standardizing EV purity analysis.
- Further development of EV isolation and purification is critical for reliable downstream applications.
