Journal: Journal of Extracellular Vesicles
Article Title: Hyaluronic Acid Decoration Facilitates CD44‐Mediated Targeting and Alters Protein Corona Formation of Extracellular Vesicles
doi: 10.1002/jev2.70263
Figure Lengend Snippet: MP‐SPR based CD9‐antibody capture of EVs and plasma‐derived corona formation. SPR responses with 670 nm (line) and 785 nm lasers (dashed line) and the ratio of the two wavelengths (dots) from CD9‐antibody captured MCF7‐EVs (A) and HAS3‐EVs (B) over 30‐min injections of EVs ( n = 3, STDEV). After EV capture, EV‐depleted plasma was injected to the system, causing a sharp increase in the SPR‐signal, followed by sharp decrease after washing with PBS (indicated with arrows). The corona refractive index and thickness were calculated from the remaining tail signal. SPR responses with 670 nm (line) and 785 nm lasers (dashed line) for plasma injection and protein corona formation on MCF7‐EVs (C) and HAS3‐EVs (D) ( n = 3, STDEV). The average ratio of the signals measured at 670 and 785 nm for the dual‐wavelength method to calculate the EV diameters, and refractive index (RI) and thickness of the protein corona determined with LayerSolver are shown in the table. EV, extracellular vesicle; HA, hyaluronic acid.
Article Snippet: The SPR reflectance spectrum was recorded between 58° and 77° with a scanning time of approximately 2.0 s. Data were exported in ASCII format with MP‐SPR Navi Data Viewer 6.7.0.1 software (BioNavis), and SPR peak angular positions were determined using the weighted centroid method.
Techniques: Clinical Proteomics, Derivative Assay, Injection, Refractive Index