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Automated Lipid Bilayer Membrane Formation Using a Polydimethylsiloxane Thin Film
Published on: July 10, 2016
Black lipid membranes stabilized through substrate conjugation to a hydrogel
Tae-Joon Jeon1, Noah Malmstadt, Jason L Poulos
1Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, California 90095, USA.
Biointerphases
|April 23, 2010
Summary
This study stabilizes lipid bilayer membranes by creating a hydrogel mold to secure the solvent annulus, maintaining high membrane resistance for over 12 days. Ion channel function remained consistent with conventional membranes.
Area of Science:
- Biophysics
- Materials Science
Background:
- Lipid bilayer membranes are crucial in biological systems and research.
- Stabilizing lipid bilayers often involves solid supports or surface tethering.
- The solvent annulus is a key factor in maintaining lipid bilayer stability.
Purpose of the Study:
- To develop a novel method for stabilizing the solvent annulus in lipid bilayer membranes.
- To enhance the longevity and robustness of artificial lipid bilayers.
Main Methods:
- Functionalizing glass substrates with 3-methacryloxypropyltrimethoxysilane.
- Cross-linking the functionalized substrate with a polyethyleneglycol dimethacrylate hydrogel.
- Creating a conformal mold of the hydrogel around the lipid bilayer and solvent reservoir.
Main Results:
- The hydrogel effectively confined the solvent annulus to the aperture boundary.
- The stabilized lipid bilayer membranes maintained a resistance greater than 1 Gigaohm for 12 days.
- Incorporated ion channels (gramicidin A, alpha-hemolysin, alamethicin) exhibited normal conductance behavior.
Conclusions:
- The hydrogel-based approach successfully stabilizes lipid bilayer membranes by securing the solvent annulus.
- This method offers a robust platform for long-term lipid bilayer studies.
- The technique preserves the functional integrity of embedded ion channels.
