title: Immuno-characterization of Exosomes Using Nanoparticle Tracking Analysis.
abstract: Due to their size, small extracellular vesicles such as exosomes have been difficult to identify and to quantify. As the roles that exosomes play in intercellular signalling become clearer, so does their potential utility as both diagnostic biomarkers for disease and as therapeutic vectors. Accurate assessment of exosomes, both their number and their cargo, is important for continued advancement in the field of vesicle research. To that end, several technologies, including nanoparticle tracking analysis, have been developed to define the physical characteristics of vesicle preparations and determine their concentration. This chapter describes a method for identifying the size and concentration of a subpopulation of vesicles in biological samples, using nanoparticle tracking analysis. Characterization of distinct exosomes is enabled by specific marker antibodies, coupled to fluorescent quantum dots.
authors.affiliation: Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, PO Box 2100, Adelaide, SA, 5001, Australia.
authors.forename: Kym
authors.initials: K
authors.lastname: McNicholas
authors.affiliation: Flinders Centre for Innovation in Cancer, School of Medicine, Flinders University, PO Box 2100, Adelaide, SA, 5001, Australia. michael.michael@flinders.edu.au.|Department of Gastroenterology and Hepatology, Flinders Medical Centre, Bedford Park, SA, 5042, Australia. michael.michael@flinders.edu.au.
authors.forename: Michael Z
authors.initials: MZ
authors.lastname: Michael
mesh_terms: D015415:Biomarkers; D015374:Biosensing Techniques; D045744:Cell Line, Tumor; D055252:Cell-Derived Microparticles / Q000737:chemistry / Q000378:metabolism; D017077:Culture Media, Conditioned; D055354:Exosomes / Q000737:chemistry / Q000378:metabolism; D000067128:Extracellular Vesicles / Q000737:chemistry / Q000378:metabolism; D005455:Fluorescent Antibody Technique; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D045663:Quantum Dots
chemical_list: D015415:Biomarkers; D017077:Culture Media, Conditioned
keywords: CD63; Exosomes; Microvesicles; NanoSight; Qdots®; Quantum dots