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- Title
Label-free identification and chemical characterisation of single extracellular vesicles and lipoproteins by synchronous Rayleigh and Raman scattering.
- Authors
Enciso-Martinez, Agustin; Van Der Pol, Edwin; Hau, Chi M.; Nieuwland, Rienk; Van Leeuwen, Ton G.; Terstappen, Leon W.M.M.; Otto, Cees
- Abstract
Extracellular vesicles (EVs) present in blood originate from cells of different origins such as red blood cells (RBCs), platelets and leukocytes. In patients with cancer, a small portion of EVs originate from tumour cells and their load is associated with poor clinical outcome. Identification of these tumour-derived extracellular vesicles (tdEVs) is difficult as they are outnumbered by EVs of different tissue of origin as well a large number of lipoproteins (LPs) that are in the same size range. In order to detect tdEVs from the abundant presence of other particles, single-particle techniques are necessary. Here, synchronous Rayleigh and Raman scattering is used for that purpose. This combination of light scattering techniques identifies optically trapped single particles based on Rayleigh scattering and distinguishes differences in chemical composition of particle populations based on Raman scattering. Here, we show that tdEVs can be distinguished from RBC EVs and LPs in a label-free manner and directly in suspension.
- Subjects
RAYLEIGH scattering; RAMAN scattering; LIPOPROTEINS; ERYTHROCYTES; LIGHT scattering; EXTRACELLULAR vesicles; SERS spectroscopy
- Publication
Journal of Extracellular Vesicles, 2020, Vol 9, Issue 1, p1
- ISSN
2001-3078
- Publication type
Article
- DOI
10.1080/20013078.2020.1730134