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Updated: Jun 28, 2025
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Double Emulsion Generation Using a Polydimethylsiloxane PDMS Co-axial Flow Focus Device
Published on: December 25, 2015
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High-precision screening and sorting of double emulsion droplets
Siyuan Zhuang1, Lucie Semenec2, Stephanie S Nagy3
1School of Engineering, Macquarie University, Sydney, New South Wales, Australia.
Summary
Double emulsion droplets enable flow cytometry (FC) to isolate cells secreting specific molecules. This study addresses technical challenges, presenting high-performance sorting for improved cell analysis.
Area of Science:
- Biotechnology
- Cell Biology
- Analytical Chemistry
Background:
- Cell populations exhibit significant heterogeneity, with individual cells performing distinct functions.
- Flow cytometry (FC) and fluorescence-activated cell sorting (FACS) are powerful tools for single-cell analysis, but cannot isolate cells based on secreted extracellular products.
- Double emulsion (DE) droplets offer a novel solution by encapsulating extracellular products, enabling their analysis and the isolation of producing cells via FC/FACS.
Purpose of the Study:
- To investigate the use of double emulsion (DE) droplets in conjunction with flow cytometry (FC) for the identification and isolation of single cells based on their secreted products.
- To address and overcome the technical challenges associated with DE-based screening and sorting, such as droplet rupture, accuracy, and sorting efficiency.
- To provide guidance for researchers utilizing DE-based FC for cell analysis and sorting.
Main Methods:
- Development and application of double emulsion (DE) droplet technology for encapsulating single cells and their secreted products.
- Integration of DE droplets with flow cytometry (FC) and fluorescence-activated cell sorting (FACS) for high-throughput screening.
- Utilized fluorescent beads as cell simulants to optimize and validate high-performance sorting protocols for DE-based systems.
Main Results:
- Demonstrated the feasibility of using DE droplets as pico-reactors for cell cultivation and monitoring within a flow cytometry system.
- Presented a high-performance sorting strategy for DE-based flow cytometry, achieving improved accuracy and efficiency.
- Successfully used fluorescent beads to simulate cells, validating the enhanced sorting capabilities for DE-based screening and isolation.
Conclusions:
- Double emulsion (DE) droplets are a promising technology for enabling the isolation of cells based on their secreted products using flow cytometry (FC) and fluorescence-activated cell sorting (FACS).
- The study provides crucial insights and practical solutions for overcoming technical hurdles in DE-based cell sorting, paving the way for broader applications.
- This approach enhances the capabilities of single-cell analysis, allowing for rare cell identification and characterization based on secreted factors.
