Abstract
This book chapter aims at providing an overview of all the aspects and procedures needed to develop a droplet-based workflow for single-cell analysis (see Fig. 10.1). The surfactant system used to stabilize droplets is a critical component of droplet microfluidics; its properties define the type of droplet-based assays and workflows that can be developed. The scope of this book chapter is limited to fluorinated surfactant systems that have proved to generate extremely stable droplets and allow to easily retrieve the encapsulated material. The formulation section discusses how the experimental parameters influence the choice of the surfactant system to use. The circuit design section presents recipes to design and integrate different droplet modules into a whole assay. The fabrication section describes the manufacturing of microfluidic chip including the surface treatment which is pivotal in droplet microfluidics. Finally, the last section reviews the experimental setup for fluorescence detection with an emphasis on cell injection and incubation.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsReferences
Huebner A, Sharma S, Srisa-Art M et al (2008) Microdroplets: a sea of applications? Lab Chip 8:1244–1254
Lindstrom S, Andersson-Svahn H (2010) Overview of single-cell analyses: microdevices and applications. Lab on a Chip 10: 3363–3372
Song H, Chen D L, Ismagilov R F (2006) Reactions in droplets in microfluidic channels. Angew Chem Int Ed Engl 45:7336–7356
Teh S Y, Lin R, Hung L H et al (2008) Droplet microfluidics. Lab Chip 8:198–220
Taly V, Kelly B T, Griffiths A D (2007) Droplets as microreactors for high-throughput biology. ChemBioChem 8:263–272
Brouzes E, Medkova M, Savenelli N et al (2009) Droplet microfluidic technology for single-cell high-throughput screening. Proc Natl Acad Sci USA 106:14195–14200
Clausell-Tormos J, Lieber D, Baret J C et al (2008) Droplet-based microfluidic platforms for the encapsulation and screening of Mammalian cells and multicellular organisms. Chem Biol 15:427–437
Holtze C, Rowat A C, Agresti J J et al (2008) Biocompatible surfactants for water-in-fluorocarbon emulsions. Lab Chip 8:1632–1639
Koster S, Angile F E, Duan H et al (2008) Drop-based microfluidic devices for encapsulation of single cells. Lab Chip 8:1110–1115
Ahn K, Agresti J, Chong H et al (2006) Electrocoalescence of drops synchronized by size-dependent flow in microfluidic channels. Applied Physics Letters 88:264105
Baroud C N, de Saint Vincent M R, Delville J P (2007) An optical toolbox for total control of droplet microfluidics. Lab Chip 7:1029–1033
Chabert M, Dorfman K D, Viovy J L (2005) Droplet fusion by alternating current (AC) field electrocoalescence in microchannels. Electrophoresis 26:3706–3715
Link D R, Grasland-Mongrain E, Duri A et al (2006) Electric control of droplets in microfluidic devices. Angew Chem Int Ed Engl 45:2556–2560
Niu X, Gulati S, Edel J B et al (2008) Pillar-induced droplet merging in microfluidic circuits. Lab Chip 8:1837–1841
Priest C, Herminghaus S, Seemann R (2006) Controlled electrocoalescence in microfluidics: Targeting a single lamella. Applied Physics Letters 89:134101
Abate A R, Hung T, Mary P et al (2010) High-throughput injection with microfluidics using picoinjectors. Proc Natl Acad Sci USA 107:19163–19166
Song H, Tice J D, Ismagilov R F (2003) A microfluidic system for controlling reaction networks in time. Angew Chem Int Ed Engl 42:768–772
Frenz L, Blank K, Brouzes E et al (2009) Reliable microfluidic on-chip incubation of droplets in delay-lines. Lab on a Chip 9:1344–1348
Ahn K, Kerbage K, Hunt T P et al (2006) Dielectrophoretic manipulation of drops for high-speed microfluidic sorting devices. Applied Physics Letters 88:024104
Sarrazin F, Prat L, Di Miceli N et al (2007) Mixing characterization inside microdroplets engineered on a microcoalescer. Chemical Engineering Science 62:1042–1048
Song H, Ismagilov R F (2003) Millisecond Kinetics on a Microfluidic Chip Using Nanoliters of Reagents. J. Am. Chem. Soc. 125:14613–14619
Chabert M, Viovy J L (2008) Microfluidic high-throughput encapsulation and hydrodynamic self-sorting of single cells. Proc Natl Acad Sci USA 105:3191–3196
Edd J F, Di Carlo D, Humphry K J et al (2008) Controlled encapsulation of single-cells into monodisperse picolitre drops. Lab Chip 8:1262–1264
Sgro A E, Allen P B, Chiu D T (2007) Thermoelectric manipulation of aqueous droplets in microfluidic devices. Anal Chem 79:4845–4851
Baret J C, Beck Y, Billas-Massobrio I et al (2010) Quantitative cell-based reporter gene assays using droplet-based microfluidics. Chem Biol 17:528–536
Huebner A, Srisa-Art M, Holt D et al (2007) Quantitative detection of protein expression in single cells using droplet microfluidics. Chem Commun 12:1218–1220
Boedicker J Q, Li L, Kline T R et al (2008) Detecting bacteria and determining their susceptibility to antibiotics by stochastic confinement in nanoliter droplets using plug-based microfluidics. Lab Chip 8:1265–1272
Luo C, Yang X, Fu Q et al (2006) Picoliter-volume aqueous droplets in oil: electrochemical detection and yeast cell electroporation. Electrophoresis 27:1977–1983
Xiao K, Zhang M, Chen S et al (2010) Electroporation of micro-droplet encapsulated HeLa cells in oil phase. ELECTROPHORESIS 31:3175–3180
Zhan Y, Wang J, Bao N et al (2009) Electroporation of cells in microfluidic droplets. Anal Chem 81:2027–2031
He M, Edgar J S, Jeffries G D et al (2005) Selective encapsulation of single cells and subcellular organelles into picoliter- and femtoliter-volume droplets. Anal Chem 77:1539–1544
Novak R, Zeng Y, Shuga J et al (2011) Single-cell multiplex gene detection and sequencing with microfluidically generated agarose emulsions. Angew Chem Int Ed Engl 50:390–395
Vijayakumar K, Gulati S, deMello A J et al (2010) Rapid cell extraction in aqueous two-phase microdroplet systems. Chemical Science 1:447–452
Konry T, Dominguez-Villar M, Baecher-Allan C et al (2011) Droplet-based microfluidic platforms for single T cell secretion analysis of IL-10 cytokine. Biosensors and Bioelectronics 26:2707–2710
Chen D, Du W, Liu Y et al (2008) The chemistrode: a droplet-based microfluidic device for stimulation and recording with high temporal, spatial, and chemical resolution. Proc Natl Acad Sci USA 105:16843–16848
Liu W, Kim H J, Lucchetta E M et al (2009) Isolation, incubation, and parallel functional testing and identification by FISH of rare microbial single-copy cells from multi-species mixtures using the combination of chemistrode and stochastic confinement. Lab Chip 9:2153–2162
Joensson H N, Samuels M L, Brouzes E R et al (2009) Detection and analysis of cell surface biomarkers expressed at extremely low levels using enzymatic amplification in microfluidic droplets. Angew Chem Int Ed Engl 48:2518–2521
Agresti J J, Antipov E, Abate A R et al (2010) Ultrahigh-throughput screening in drop-based microfluidics for directed evolution. Proc Natl Acad Sci USA 107:4004–4009
Baret J C, Miller O J, Taly V et al (2009) Fluorescence-activated droplet sorting (FADS): efficient microfluidic cell sorting based on enzymatic activity. Lab Chip 9:1850–1858
Kumaresan P, Yang C J, Cronier S A et al (2008) High-throughput single copy DNA amplification and cell analysis in engineered nanoliter droplets. Anal Chem 80:3522–3529
Zeng Y, Novak R, Shuga J et al (2010) High-Performance Single Cell Genetic Analysis Using Microfluidic Emulsion Generator Arrays. Anal Chem 82:3183–3190
Johnston K P, Harrison K L, Clarke M J et al (1996) Water-in-Carbon Dioxide Microemulsions: An Environment for Hydrophiles Including Proteins. Science 271:624–626
Schmitz C H, Rowat A C, Koster S et al (2009) Dropspots: a picoliter array in a microfluidic device. Lab Chip 9:44–49
Huebner A, Olguin L F, Bratton D et al (2008) Development of Quantitative Cell-Based Enzyme Assays in Microdroplets. Analytical Chemistry 80:3890–3896
Shim J-u, Olguin L F, Whyte G et al (2009) Simultaneous Determination of Gene Expression and Enzymatic Activity in Individual Bacterial Cells in Microdroplet Compartments. Journal of the American Chemical Society 131:15251–15256
Granieri L, Baret J-C, Griffiths A D et al (2010) High-Throughput Screening of Enzymes by Retroviral Display Using Droplet-Based Microfluidics. Chemistry & biology 17:229–235
Srisa-Art M, Bonzani I C, Williams A et al (2009) Identification of rare progenitor cells from human periosteal tissue using droplet microfluidics. Analyst 134:2239–2245
Abbyad P, Tharaux P-L, Martin J-L et al (2010) Sickling of red blood cells through rapid oxygen exchange in microfluidic drops. Lab on a Chip 10:2505–2512
Bai Y, He X, Liu D et al (2010) A double droplet trap system for studying mass transport across a droplet-droplet interface. Lab on a Chip 10:1281–1285
Courtois F, Olguin L F, Whyte G et al (2009) Controlling the Retention of Small Molecules in Emulsion Microdroplets for Use in Cell-Based Assays. Analytical Chemistry 81:3008–3016
Wootton R C, Demello A J (2010) Microfluidics: Exploiting elephants in the room. Nature 464:839–840
Wu N, Courtois F, Zhu Y et al (2010) Management of the diffusion of 4-methylumbelliferone across phases in microdroplet-based systems for in vitro protein evolution. ELECTROPHORESIS 31:3121–3128
Kreutz J E, Shukhaev A, Du W et al (2010) Evolution of catalysts directed by genetic algorithms in a plug-based microfluidic device tested with oxidation of methane by oxygen. J Am Chem Soc 132:3128–3132
Tewhey R, Warner J B, Nakano M et al (2010) Microdroplet-based PCR enrichment for large-scale targeted sequencing. Nat Biotechnol 27:1025–1031
Holt D J, Payne R J, Abell C (2010) Synthesis of novel fluorous surfactants for microdroplet stabilisation in fluorous oil streams. Journal of Fluorine Chemistry 131:398–407
Holt D J, Payne R J, Chow W Y et al (2010) Fluorosurfactants for microdroplets: Interfacial tension analysis. Journal of Colloid and Interface Science 350:205–211
Roach L S, Song H, Ismagilov R F (2005) Controlling nonspecific protein adsorption in a plug-based microfluidic system by controlling interfacial chemistry using fluorous-phase surfactants. Anal Chem 77:785–796
Baroud C N, Gallaire F, Dangla R (2010) Dynamics of microfluidic droplets. Lab Chip 10:2032–2045
Di Carlo D, Irimia D, Tompkins R G et al (2007) Continuous inertial focusing, ordering, and separation of particles in microchannels. Proc Natl Acad Sci USA 104:18892–18897
Humphry K J, Kulkarni P M, Weitz D A et al (2010) Axial and lateral particle ordering in finite Reynolds number channel flows. Phys. Fluids 22:081703
Niu X, Gielen F, deMello A J et al (2009) Electro-Coalescence of Digitally Controlled Droplets. Analytical Chemistry 81:7321–7325
Abate A R, Chen C H, Agresti J J et al (2009) Beating Poisson encapsulation statistics using close-packed ordering. Lab Chip 9:2628–2631
Srisa-Art M, deMello A J, Edel J B (2009) High-throughput confinement and detection of single DNA molecules in aqueous microdroplets. Chemical Communications6548–6550
Rowat A C, Weitz D A (2008) How to easily punch holes in a PDMS microfluidic device. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/punching_holes.asp.
Eddings M A, Johnsson M A, Gale B K (2008) Determining the optimal PDMS–PDMS bonding technique for microfluidic devices. Journal of Micromechanics and Microengineering 18:067001
Fuerstman M J, Lai A, Thurlow M E et al (2007) The pressure drop along rectangular microchannels containing bubbles. Lab Chip 7:1479–1489
Duffy D C, McDonald J C, Schueller O J A et al (1998) Rapid Prototyping of Microfluidic Systems in Poly(dimethylsiloxane). Anal. Chem. 70:4974–4984
McDonald J C, Duffy D C, Anderson J R et al (2000) Fabrication of microfluidic systems in poly(dimethylsiloxane). Electrophoresis 21:27–40
Qin D, Xia Y, Whitesides G M (1996) Rapid prototyping of complex structures with feature sizes larger than 20 μm. Advanced Materials 8:917–919
Microchem. PROCESSING GUIDELINES FOR: SU-8 2025, SU-8 2035, SU-8 2050 and SU-8 2075. Data Sheet. http://www.microchem.com/products/pdf/SU-82000DataSheet82025thru82075Ver82004.pdf.
Hung L H, Lin R, Lee A P (2008) Rapid microfabrication of solvent-resistant biocompatible microfluidic devices. Lab Chip 8:983–987
Tan J L, Tien J, Pirone D M et al (2003) Cells lying on a bed of microneedles: an approach to isolate mechanical force. Proc Natl Acad Sci USA 100:1484–1489
Wang J, Zheng M, Wang W et al (2010) Optimal Protocol for Molding PDMS with a PDMS master. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/moldingPDMS.asp.
Desai S P, Freeman D M, Voldman J (2009) Plastic masters-rigid templates for soft lithography. Lab Chip 9:1631–1637
Estevez-Torres A, Yamada A, Wang L (2009) An inexpensive and durable epoxy mold for PDMS. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/epoxy_mould.asp.
LaFratta C N (2010) Degas PDMS in Two Minutes Using a Centrifuge. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/degas_PDMS.asp.
O’Neil A, Soo Hoo J, Walker G (2006) Rapid curing of PDMS for microfluidic applications. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/index.asp.
Siegel A C, Shevkoplyas S S, Weibel D B et al (2006) Cofabrication of electromagnets and microfluidic systems in poly(dimethy-lsiloxane). Angew Chem Int Ed Engl 45:6877–6882
Clausell-Tormos J, Griffiths A D, Merten C A (2010) An automated two-phase microfluidic system for kinetic analyses and the screening of compound libraries. Lab on a Chip 10:1302–1307
Ward T, Faivre M, Abkarian M et al (2005) Microfluidic flow focusing: drop size and scaling in pressure versus flow-rate-driven pumping. Electrophoresis 26:3716–3724
Lindmo T, Steen H B (1979) Characteristics of a simple, high-resolution flow cytometer based o a new flow configuration. Biophys J 28:33–44
Steen H B, Lindmo T (1979) Flow cytometry: a high-resolution instrument for everyone. Science 204:403–404
Baret J C (2009) A remote syringe for cells, beads and particle injection in microfluidic channels. Lab on a Chip. Chips & Tips. http://www.rsc.org/Publishing/Journals/lc/Chips_and_Tips/remote_syringe.asp.
Hinderliter P M, DeLorme M P, Kennedy G L (2006) Perfluorooctanoic acid: relationship between repeated inhalation exposures and plasma PFOA concentration in the rat. Toxicology 222:80–85
So M K, Yamashita N, Taniyasu S et al (2006) Health risks in infants associated with exposure to perfluorinated compounds in human breast milk from Zhoushan, China. Environ Sci Technol 40:2924–2929
Frenz L, Blouwolff J, Griffiths A D et al (2008) Microfluidic production of droplet pairs. Langmuir 24:12073–12076
Hashimoto M, Shevkoplyas S S, Zasonska B et al (2008) Formation of bubbles and droplets in parallel, coupled flow-focusing geometries. Small 4:1795–1805
Hong J, Choi M, Edel J B et al (2010) Passive self-synchronized two-droplet generation. Lab on a Chip 10:2702–2709
Prat L, Sarrazin F, Tasseli J et al (2006) Increasing and decreasing droplets velocity in microchannels. Microfluidics and Nanofluidics Volume 2:271–274
Begolo S, Colas G, Viovy J L et al (2011) New family of fluorinated polymer chips for droplet and organic solvent microfluidics. Lab Chip 11:508–512
Shapiro H M (2003) Practical flow cytometry. Wiley-Liss, New York
Acknowledgments
I am greatly indebted to all my former colleagues from Raindance Technologies, particularly Dr Darren Link, for introducing me to droplet microfluidics. I would like to thank Professor Helmut Strey for useful discussions and Dr Phenix-Lan Quan for her great support. This research was supported by funds from The Center for Biotechnology, an Empire State Development, Division of Science, Technology and Innovation (NYSTAR), Center for Advanced Technology and a grant from NIH-NHGRI (1 R21 HG006206-01)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2012 Springer Science+Business Media, LLC
About this protocol
Cite this protocol
Brouzes, E. (2012). Droplet Microfluidics for Single-Cell Analysis. In: Lindström, S., Andersson-Svahn, H. (eds) Single-Cell Analysis. Methods in Molecular Biology, vol 853. Humana Press. https://doi.org/10.1007/978-1-61779-567-1_10
Download citation
DOI: https://doi.org/10.1007/978-1-61779-567-1_10
Published:
Publisher Name: Humana Press
Print ISBN: 978-1-61779-566-4
Online ISBN: 978-1-61779-567-1
eBook Packages: Springer Protocols