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Sonker M, Kim D, Egatz-Gomez A, Ros A. Separation Phenomena in Tailored Micro- and Nanofluidic Environments. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2019; 12:475-500. [PMID: 30699038 DOI: 10.1146/annurev-anchem-061417-125758] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Separations of bioanalytes require robust, effective, and selective migration phenomena. However, due to the complexity of biological matrices such as body fluids or tissue, these requirements are difficult to achieve. The separations field is thus constantly evolving to develop suitable methods to separate biomarkers and fractionate biospecimens for further interrogation of biomolecular content. Advances in the field of microfabrication allow the tailored generation of micro- and nanofluidic environments. These can be exploited to induce interactions and dynamics of biological species with the corresponding geometrical features, which in turn can be capitalized for novel separation approaches. This review provides an overview of several unique separation applications demonstrated in recent years in tailored micro- and nanofluidic environments. These include electrokinetic methods such as dielectrophoresis and electrophoresis, but also rather nonintuitive ratchet separation mechanisms, continuous flow separations, and fractionations such as deterministic lateral displacement, as well as methods employing entropic forces for separation.
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Affiliation(s)
- Mukul Sonker
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA;
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA
| | - Daihyun Kim
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA;
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA
| | - Ana Egatz-Gomez
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA;
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA
| | - Alexandra Ros
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287, USA;
- Center for Applied Structural Discovery, The Biodesign Institute, Arizona State University, Tempe, Arizona 85287, USA
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Bao P, Cartron ML, Sheikh KH, Johnson BRG, Hunter CN, Evans SD. Controlling transmembrane protein concentration and orientation in supported lipid bilayers. Chem Commun (Camb) 2018; 53:4250-4253. [PMID: 28361139 DOI: 10.1039/c7cc01023k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The trans-membrane protein - proteorhodopsin (pR) has been incorporated into supported lipid bilayers (SLB). In-plane electric fields have been used to manipulate the orientation and concentration of these proteins, within the SLB, through electrophoresis leading to a 25-fold increase concentration of pR.
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Affiliation(s)
- P Bao
- School of Physics & Astronomy, University of Leeds, LS2 9JT, UK.
| | - M L Cartron
- Department of Molecular Biology & Biotechnology, University of Sheffield, S10 2TH, UK
| | - K H Sheikh
- School of Biomedical Science, University of Leeds, LS2 9JT, UK
| | - B R G Johnson
- School of Physics & Astronomy, University of Leeds, LS2 9JT, UK.
| | - C N Hunter
- Department of Molecular Biology & Biotechnology, University of Sheffield, S10 2TH, UK
| | - S D Evans
- School of Physics & Astronomy, University of Leeds, LS2 9JT, UK.
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Motegi T, Yamazaki K, Ogino T, Tero R. Substrate-Induced Structure and Molecular Dynamics in a Lipid Bilayer Membrane. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14748-14755. [PMID: 29236511 DOI: 10.1021/acs.langmuir.7b03212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The solid-substrate-dependent structure and dynamics of molecules in a supported lipid bilayer (SLB) were directly investigated via atomic force microscopy (AFM) and single particle tracking (SPT) measurements. The appearance of either vertical or horizontal heterogeneities in the SLB was found to be strongly dependent on the underlying substrates. SLB has been widely used as a biointerface with incorporated proteins and other biological materials. Both silica and mica are popular substrates for SLB. Using single-molecule dynamics, the fluidity of the upper and lower membrane leaflets was found to depend on the substrate, undergoing coupling and decoupling on the SiO2/Si and mica substrates, respectively. The anisotropic diffusion caused by the locally destabilized structure of the SLB at atomic steps appeared on the Al2O3(0001) substrate because of the strong van der Waals interaction between the SLB and the substrate. Our finding that the well-defined surfaces of mica and sapphire result in asymmetry and anisotropy in the plasma membrane is useful for the design of new plasma-membrane-mimetic systems. The application of well-defined supporting substrates for SLBs should have similar effects as cell membrane scaffolds, which regulate the dynamic structure of the membrane.
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Affiliation(s)
| | - Kenji Yamazaki
- Division of Applied Physics, Graduate School of Engineering, Hokkaido University , Sapporo 060-8628, Japan
| | - Toshio Ogino
- Department of Engineering, Yokohama National University , Yokohama 240-8501, Japan
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Gunnarsson A, Simonsson Nyström L, Burazerovic S, Gunnarsson J, Snijder A, Geschwindner S, Höök F. Affinity Capturing and Surface Enrichment of a Membrane Protein Embedded in a Continuous Supported Lipid Bilayer. ChemistryOpen 2016; 5:445-449. [PMID: 27777836 PMCID: PMC5062009 DOI: 10.1002/open.201600070] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 11/26/2022] Open
Abstract
Investigations of ligand-binding kinetics to membrane proteins are hampered by their poor stability and low expression levels, which often translates into sensitivity-related limitations impaired by low signal-to-noise ratios. Inspired by affinity capturing of water-soluble proteins, which utilizes water as the mobile phase, we demonstrate affinity capturing and local enrichment of membrane proteins by using a fluid lipid bilayer as the mobile phase. Specific membrane-protein capturing and enrichment in a microfluidic channel was accomplished by immobilizing a synthesized trivalent nitrilotriacetic acid (tris-NTA)-biotin conjugate. A polymer-supported lipid bilayer containing His6-tagged β-secretase (BACE) was subsequently laterally moved over the capture region by using a hydrodynamic flow. Specific enrichment of His6-BACE in the Ni2+-NTA-modified region of the substrate resulted in a stationary three-fold increase in surface coverage, and an accompanied increase in ligand-binding response.
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Affiliation(s)
| | | | - Sabina Burazerovic
- Department of Applied PhysicsChalmers University of Technology412 96GöteborgSweden
| | | | - Arjan Snijder
- Discovery SciencesAstraZeneca R&D Mölndal43183MölndalSweden
| | | | - Fredrik Höök
- Department of Applied PhysicsChalmers University of Technology412 96GöteborgSweden
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Motegi T, Nabika H, Fu Y, Chen L, Sun Y, Zhao J, Murakoshi K. Effective Brownian ratchet separation by a combination of molecular filtering and a self-spreading lipid bilayer system. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7496-7501. [PMID: 24913260 DOI: 10.1021/la500943k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new molecular manipulation method in the self-spreading lipid bilayer membrane by combining Brownian ratchet and molecular filtering effects is reported. The newly designed ratchet obstacle was developed to effectively separate dye-lipid molecules. The self-spreading lipid bilayer acted as both a molecular transport system and a manipulation medium. By controlling the size and shape of ratchet obstacles, we achieved a significant increase in the separation angle for dye-lipid molecules compared to that with the previous ratchet obstacle. A clear difference was observed between the experimental results and the simple random walk simulation that takes into consideration only the geometrical effect of the ratchet obstacles. This difference was explained by considering an obstacle-dependent local decrease in molecular diffusivity near the obstacles, known as the molecular filtering effect at nanospace. Our experimental findings open up a novel controlling factor in the Brownian ratchet manipulation that allow the efficient separation of molecules in the lipid bilayer based on the combination of Brownian ratchet and molecular filtering effects.
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Affiliation(s)
- Toshinori Motegi
- Department of Chemistry, Faculty of Science, Hokkaido University , Sapporo 060-0810, Japan
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Fu Y, Chen L, Sun W, Chen T, Sun Y, Zhao J. Simulation for diffusion behaviour of molecules in nanopattern-supported lipid bilayers based on random walk theory. MOLECULAR SIMULATION 2014. [DOI: 10.1080/08927022.2013.803553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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MOTEGI T, TAKIMOTO B, NABIKA H, MURAKOSHI K. Molecule Manipulation at Electrified Interfaces using Metal Nanogates. ELECTROCHEMISTRY 2014. [DOI: 10.5796/electrochemistry.82.712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Substrate Effects on the Formation Process, Structure and Physicochemical Properties of Supported Lipid Bilayers. MATERIALS 2012. [PMCID: PMC5449048 DOI: 10.3390/ma5122658] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Supported lipid bilayers are artificial lipid bilayer membranes existing at the interface between solid substrates and aqueous solution. Surface structures and properties of the solid substrates affect the formation process, fluidity, two-dimensional structure and chemical activity of supported lipid bilayers, through the 1–2 nm thick water layer between the substrate and bilayer membrane. Even on SiO2/Si and mica surfaces, which are flat and biologically inert, and most widely used as the substrates for the supported lipid bilayers, cause differences in the structure and properties of the supported membranes. In this review, I summarize several examples of the effects of substrate structures and properties on an atomic and nanometer scales on the solid-supported lipid bilayers, including our recent reports.
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Bao P, Cheetham MR, Roth JS, Blakeston AC, Bushby RJ, Evans SD. On-Chip Alternating Current Electrophoresis in Supported Lipid Bilayer Membranes. Anal Chem 2012; 84:10702-7. [DOI: 10.1021/ac302446w] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Peng Bao
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Matthew R. Cheetham
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Johannes S. Roth
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Anita C. Blakeston
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Richard J. Bushby
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
| | - Stephen D. Evans
- School of Physics and
Astronomy, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, United Kingdom
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Tamura M, Iida T. Fluctuation-mediated optical screening of nanoparticles. NANO LETTERS 2012; 12:5337-5341. [PMID: 22928781 DOI: 10.1021/nl302716c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Inspired by biological motors, we propose a guiding principle for selectively separating nanoparticles (NPs) by efficiently using the light-induced force (LIF) and thermal fluctuations. We demonstrate the possibility of transporting metallic NPs of different sizes with a size-selection accuracy of less than 10 nm even at room temperature by designing asymmetric spatiotemporal light fields. This technique will lead to unconventional nanoextraction processes based on light and fluctuations.
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Affiliation(s)
- Mamoru Tamura
- Nanoscience and Nanotechnology Research Center, Osaka Prefecture University, 1-2, Gakuencho, Nakaku, Sakai, Osaka 599-8570, Japan
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Nabika H, Murakoshi K. Electric-field-assisted Control of Lipid Bilayer Stacking Structure. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hideki Nabika
- Department of Chemistry, Faculty of Science, Hokkaido University
| | - Kei Murakoshi
- Department of Chemistry, Faculty of Science, Hokkaido University
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