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Title: Hydrodynamic trapping for rapid assembly and in situ electrical characterization of droplet interface bilayer arrays

Journal Article · · Lab on a Chip
DOI:https://doi.org/10.1039/C6LC00810K· OSTI ID:1334470
 [1];  [2];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. UT-Battelle, Oak Ridge, TN (United States)

The droplet interface bilayer (DIB) is a modular technique for assembling planar lipid membranes between water droplets in oil. The DIB method thus provides a unique capability for developing digital, droplet-based membrane platforms for rapid membrane characterization, drug screening and ion channel recordings. This paper demonstrates a new, low-volume microfluidic system that automates droplet generation, sorting, and sequential trapping in designated locations to enable the rapid assembly of arrays of DIBs. The channel layout of the device is guided by an equivalent circuit model, which predicts that a serial arrangement of hydrodynamic DIB traps enables sequential droplet placement and minimizes the hydrodynamic pressure developed across filled traps to prevent squeeze-through of trapped droplets. Furthermore, the incorporation of thin-film electrodes fabricated via evaporation metal deposition onto the glass substrate beneath the channels allows for the first time in situ, simultaneous electrical interrogation of multiple DIBs within a sealed device. Combining electrical measurements with imaging enables measurements of membrane capacitance and resistance and bilayer area, and our data show that DIBs formed in different trap locations within the device exhibit similar sizes and transport properties. Simultaneous, single channel recordings of ion channel gating in multiple membranes are obtained when alamethicin peptides are incorporated into the captured droplets, qualifying the thin-film electrodes as a means for measuring stimuli-responsive functions of membrane-bound biomolecules. Furthermore, this novel microfluidic-electrophysiology platform provides a reproducible, high throughput method for performing electrical measurements to study transmembrane proteins and biomembranes in low-volume, droplet-based membranes.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1334470
Journal Information:
Lab on a Chip, Vol. 16, Issue 18; ISSN 1473-0197
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

References (60)

Direct in situ measurement of specific capacitance, monolayer tension, and bilayer tension in a droplet interface bilayer journal January 2015
Hair cell inspired mechanotransduction with a gel-supported, artificial lipid membrane journal January 2011
Droplet based microfluidics journal December 2011
Voltage Control of Droplet Interface Bilayer Lipid Membrane Dimensions journal January 2011
Air-stable droplet interface bilayers on oil-infused surfaces journal May 2014
Extracting the hydrodynamic resistance of droplets from their behavior in microchannel networks journal March 2009
Microfluidic methods for generating continuous droplet streams journal September 2007
Electrowetting on dielectric-based microfluidics for integrated lipid bilayer formation and measurement journal July 2009
Interdroplet bilayer arrays in millifluidic droplet traps from 3D-printed moulds journal January 2014
Microfluidic array platform for simultaneous lipid bilayer membrane formation journal January 2009
Kinetics and stability of alamethicin conducting channels in lipid bilayers journal July 1976
Nanopore-Based Single-Molecule Mass Spectrometry on a Lipid Membrane Microarray journal September 2011
Dynamic and Reversible Control of 2D Membrane Protein Concentration in a Droplet Interface Bilayer journal August 2011
Heating-Enabled Formation of Droplet Interface Bilayers Using Escherichia coli Total Lipid Extract journal December 2014
Stochastic sensors inspired by biology journal September 2001
Electrical Behavior of Droplet Interface Bilayer Networks:  Experimental Analysis and Modeling journal September 2007
Functional Bionetworks from Nanoliter Water Droplets journal July 2007
Droplet Split-and-Contact Method for High-Throughput Transmembrane Electrical Recording journal November 2013
Automated Parallel Recordings of Topologically Identified Single Ion Channels journal June 2013
Ultrasensitive detection of protein translocated through toxin pores in droplet-interface bilayers journal September 2011
Microfluidic passive permeability assay using nanoliter droplet interface lipid bilayers journal January 2013
Asymmetric Droplet Interface Bilayers journal May 2008
Microchip Technology for Automated and Parallel Patch-Clamp Recording journal July 2006
Formation of artificial lipid bilayers using droplet dielectrophoresis journal January 2008
Behavior of a train of droplets in a fluidic network with hydrodynamic traps journal December 2010
Electrical Properties of Supported Lipid Bilayer Membranes journal April 2002
Whole Cell Patch Clamp Recording Performed on a Planar Glass Chip journal June 2002
Characterization of the Prokaryotic Sodium Channel NavSp Pore with a Microfluidic Bilayer Platform journal July 2015
Biological transport processes for microhydraulic actuation journal May 2007
Scalable micro-cavity bilayer lipid membrane arrays for parallel ion channel recording journal August 2014
Supported Membranes: Scientific and Practical Applications journal January 1996
Regulated Attachment Method for Reconstituting Lipid Bilayers of Prescribed Size within Flexible Substrates journal February 2010
A microdroplet-based shift register journal January 2010
Lipid Bilayer Microarray for Parallel Recording of Transmembrane Ion Currents journal January 2008
Dynamic morphologies of microscale droplet interface bilayers journal January 2014
Determining Membrane Capacitance by Dynamic Control of Droplet Interface Bilayer Area journal December 2011
Tailored Current—Voltage Relationships of Droplet-Interface Bilayers Using Biomolecules and External Feedback Control journal April 2009
A dynamic microarray device for paired bead-based analysis journal January 2010
A microfluidic platform for size-dependent generation of droplet interface bilayer networks on rails journal November 2015
Formation of Bimolecular Membranes from Lipid Monolayers and a Study of Their Electrical Properties journal December 1972
A droplet microfluidic system for sequential generation of lipid bilayers and transmembrane electrical recordings journal January 2015
Tunable crystallization via osmosis-driven transport across a droplet interface bilayer journal January 2012
Construction and Manipulation of Functional Three-Dimensional Droplet Networks journal December 2013
Formation of "solvent-free" black lipid bilayer membranes from glyceryl monooleate dispersed in squalene journal September 1978
Lipid bilayer array for simultaneous recording of ion channel activities journal July 2012
Physical encapsulation of droplet interface bilayers for durable, portable biomolecular networks journal January 2010
Activity of single ion channel proteins detected with a planar microstructure journal December 2002
Lipid Bilayer Formation by Contacting Monolayers in a Microfluidic Device for Membrane Protein Analysis journal December 2006
Synthetic Protocells to Mimic and Test Cell Function journal January 2010
Poly(dimethylsiloxane) as a Material for Fabricating Microfluidic Devices journal April 2002
Effect of Monoglyceride Structure and Cholesterol Content on Water Permeability of the Droplet Bilayer journal December 2013
Reversible, voltage-activated formation of biomimetic membranes between triblock copolymer-coated aqueous droplets in good solvents journal January 2016
Evaporation-Induced Buckling and Fission of Microscale Droplet Interface Bilayers journal April 2013
Droplet interface bilayers journal January 2008
A trap-and-release integrated microfluidic system for dynamic microarray applications journal January 2007
Alamethicin-induced current-voltage curve asymmetry in lipid bilayers journal April 1983
Formation of lipid bilayers inside microfluidic channel array for monitoring membrane-embedded nanopores of phi29 DNA packaging nanomotor journal July 2012
A double droplet trap system for studying mass transport across a droplet-droplet interface journal January 2010
3D stochastic microsensors for molecular recognition and determination of heregulin-α in biological samples journal March 2021
Microfluidic Passive Permeability Assay using Nanoliter Droplet Interface Lipid Bilayers journal January 2013

Cited By (8)

Formation of Polarized, Functional Artificial Cells from Compartmentalized Droplet Networks and Nanomaterials, Using One‐Step, Dual‐Material 3D‐Printed Microfluidics journal October 2019
Encapsulating Networks of Droplet Interface Bilayers in a Thermoreversible Organogel journal April 2018
In vitro synthesis of a Major Facilitator Transporter for specific active transport across Droplet Interface Bilayers journal December 2016
Droplet microfluidics for the construction of compartmentalised model membranes journal January 2018
Reconfiguring droplet interface bilayer networks through sacrificial membranes journal May 2018
Effects of magnetic nanoparticles on mixing in droplet-based microfluidics journal March 2019
Microfluidic Systems Applied in Solid-State Nanopore Sensors journal March 2020
Microfluidic Formation of Double-Stacked Planar Bilayer Lipid Membranes by Controlling the Water-Oil Interface journal May 2018

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