Droplet microfluidic technology for single-cell high-throughput screening.

Proc Natl Acad Sci U S A 2009 Aug 15;106(34):14195-200. Epub 2009 Jul 15.

RainDance Technologies, Lexington, MA 02421, USA.

We present a droplet-based microfluidic technology that enables high-throughput screening of single mammalian cells. This integrated platform allows for the encapsulation of single cells and reagents in independent aqueous microdroplets (1 pL to 10 nL volumes) dispersed in an immiscible carrier oil and enables the digital manipulation of these reactors at a very high-throughput. Here, we validate a full droplet screening workflow by conducting a droplet-based cytotoxicity screen. To perform this screen, we first developed a droplet viability assay that permits the quantitative scoring of cell viability and growth within intact droplets. Next, we demonstrated the high viability of encapsulated human monocytic U937 cells over a period of 4 days. Finally, we developed an optically-coded droplet library enabling the identification of the droplets composition during the assay read-out. Using the integrated droplet technology, we screened a drug library for its cytotoxic effect against U937 cells. Taken together our droplet microfluidic platform is modular, robust, uses no moving parts, and has a wide range of potential applications including high-throughput single-cell analyses, combinatorial screening, and facilitating small sample analyses.

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http://dx.doi.org/10.1073/pnas.0903542106DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2732882PMC
August 2009
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