We successfully brought nanoFACS, a method for analyzing and sorting naonoscale particles, to NIH, by modifying the Influx flow cytometer in a NCI/CCR core FACS facility in Building 10. This now allows us to analyze and sort exosomes and microparticles as small as approximately 100nm. We have developed and tested numerous modifications of the technique and instrument configuration to improve the detection limits, and hope to have methods in place within the next 6 months to routinely analyze and sort particles as small as 40nm (which would span the full range of biologically significant exosome sizes). Over the next year, we will continue 1) to use this technology to identify novel biomarkers that we can use to guide and monitor the effects of cancer therapies and immune responses (to vaccines or other immunotherapies), and 2) to identify subsets of these nanoparticles and determine their functions in tumor biology, immunobiology, and other aspects of biology.

National Institute of Health (NIH)
National Cancer Institute (NCI)
Investigator-Initiated Intramural Research Projects (ZIA)
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National Cancer Institute Division of Basic Sciences
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Morales-Kastresana, Aizea; Telford, Bill; Musich, Thomas A et al. (2017) Labeling Extracellular Vesicles for Nanoscale Flow Cytometry. Sci Rep 7:1878
Musich, Thomas; Jones, Jennifer C; Keele, Brandon F et al. (2017) Flow virometric sorting and analysis of HIV quasispecies from plasma. JCI Insight 2:e90626
Watson, Dionysios C; Bayik, Defne; Srivatsan, Avinash et al. (2016) Efficient production and enhanced tumor delivery of engineered extracellular vesicles. Biomaterials 105:195-205
Danielson, Kirsty M; Estanislau, Jessica; Tigges, John et al. (2016) Diurnal Variations of Circulating Extracellular Vesicles Measured by Nano Flow Cytometry. PLoS One 11:e0144678