1
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Lee HS, Kim YC, Wang Z, Brenner JS, Muzykantov VR, Myerson JW, Composto RJ. Controlling spatial distribution of functional lipids in a supported lipid bilayer prepared from vesicles. J Colloid Interface Sci 2024; 664:1042-1055. [PMID: 38522178 PMCID: PMC11100466 DOI: 10.1016/j.jcis.2024.03.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 02/16/2024] [Accepted: 03/09/2024] [Indexed: 03/26/2024]
Abstract
Conjugating biomolecules, such as antibodies, to bioconjugate moieties on lipid surfaces is a powerful tool for engineering the surface of diverse biomaterials, including cells and nanoparticles. We developed supported lipid bilayers (SLBs) presenting well-defined spatial distributions of functional moieties as models for precisely engineered functional biomolecular-lipid surfaces. We used quartz crystal microbalance with dissipation (QCM-D) and atomic force microscopy (AFM) to determine how vesicles containing a mixture of 1,2-dipalmitoyl-sn-glycero-3-phosphatidylcholine (DPPC) and 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[azido(polyethylene glycol)-2000] (DSPE-PEG-N3) form SLBs as a function of the lipid phase transition temperature (Tm). Above the DPPC Tm, DPPC/DSPE-PEG-N3 vesicles form SLBs with functional azide moieties on SiO2 substrates via vesicle fusion. Below this Tm, DPPC/DSPE-PEG-N3 vesicles attach to SiO2 intact. Intact DPPC/DSPE-PEG-N3 vesicles on the SiO2 surfaces fuse and rupture to form SLBs when temperature is brought above the DPPC Tm. AFM studies show uniform and complete DPPC/DSPE-PEG-N3 SLB coverage of SiO2 surfaces for different DSPE-PEG-N3 concentrations. As the DSPE-PEG-N3 concentration increases from 0.01 to 6 mol%, the intermolecular spacing of DSPE-PEG-N3 in the SLBs decreases from 4.6 to 1.0 nm. The PEG moiety undergoes a mushroom to brush transition as DSPE-PEG-N3 concentration varies from 0.1 to 2.0 mol%. Via copper-free click reaction, IgG was conjugated to SLB surfaces with 4.6 nm or 1.3 nm inter-DSPE-PEG-N3 spacing. QCM-D and AFM data show; 1) uniform and complete IgG layers of similar mass and thickness on the two types of SLB; 2) a higher-viscosity/less rigid IgG layer on the SLB with 4.6 nm inter-DSPE-PEG-N3 spacing. Our studies provide a blueprint for SLBs modeling spatial control of functional macromolecules on lipid surfaces, including surfaces of lipid nanoparticles and cells.
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Affiliation(s)
- Hyun-Su Lee
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States.
| | - Ye Chan Kim
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Zhicheng Wang
- Division of Pulmonary and Critical Care Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Jacob S Brenner
- Division of Pulmonary and Critical Care Medicine, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Vladimir R Muzykantov
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Jacob W Myerson
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA 19104, United States.
| | - Russell J Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States; Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, United States; Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia, PA 19104, United States.
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2
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Zhou F, Pan W, Chang Y, Su X, Duan X, Xue Q. A Supported Lipid Bilayer-Based Lab-on-a-Chip Biosensor for the Rapid Electrical Screening of Coronavirus Drugs. ACS Sens 2022; 7:2084-2092. [PMID: 35735978 PMCID: PMC9236208 DOI: 10.1021/acssensors.2c00970] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 06/15/2022] [Indexed: 01/06/2023]
Abstract
With the rapid spread and multigeneration variation of coronavirus, rapid drug development has become imperative. A major obstacle to addressing this issue is adequately constructing the cell membrane at the molecular level, which enables in vitro observation of the cell response to virus and drug molecules quantitatively, shortening the drug experiment cycle. Herein, we propose a rapid and label-free supported lipid bilayer-based lab-on-a-chip biosensor for the screening of effective inhibition drugs. An extended gate electrode was prepared and functionalized by an angiotensin-converting enzyme II (ACE2) receptor-incorporated supported lipid bilayer (SLB). Such an integrated system can convert the interactions of targets and membrane receptors into real-time charge signals. The platform can simulate the cell membrane microenvironment in vitro and accurately capture the interaction signal between the target and the cell membrane with minimized interference, thus observing the drug action pathway quantitatively and realizing drug screening effectively. Due to these label-free, low-cost, convenient, and integrated advantages, it is a suitable candidate method for the rapid drug screening for the early treatment and prevention of worldwide spread of coronavirus.
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Affiliation(s)
- Feng Zhou
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Wenwei Pan
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Ye Chang
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Xueyou Su
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Xuexin Duan
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
| | - Qiannan Xue
- State Key Laboratory of Precision Measuring Technology & Instruments,
School of Precision Instruments and Optoelectronics Engineering, Tianjin
University, Tianjin 300072, China
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3
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Ivanov YD, Goldaeva KV, Malsagova KA, Pleshakova TO, Galiullin RA, Popov VP, Kushlinskii NE, Alferov AA, Enikeev DV, Potoldykova NV, Archakov AI. Nanoribbon Biosensor in the Detection of miRNAs Associated with Colorectal Cancer. MICROMACHINES 2021; 12:1581. [PMID: 34945431 PMCID: PMC8705149 DOI: 10.3390/mi12121581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 12/10/2021] [Accepted: 12/17/2021] [Indexed: 02/07/2023]
Abstract
A nanoribbon biosensor (NRBS) was developed to register synthetic DNAs that simulate and are analogous to miRNA-17-3p associated with colorectal cancer. Using this nanoribbon biosensor, the ability to detect miRNA-17-3p in the blood plasma of a patient diagnosed with colorectal cancer has been demonstrated. The sensing element of the NRBS was a nanochip based on a silicon-on-insulator (SOI) nanostructure. The nanochip included an array of 10 nanoribbons and was designed with the implementation of top-down technology. For biospecific recognition of miRNA-17-3p, the nanochip was modified with DNA probes specific for miRNA-17-3p. The performance of the nanochip was preliminarily tested on model DNA oligonucleotides, which are synthetic analogues of miRNA-17-3p, and a detection limit of ~10-17 M was achieved. The results of this work can be used in the development of serological diagnostic systems for early detection of colorectal cancer.
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Affiliation(s)
- Yuri D. Ivanov
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
| | - Kristina V. Goldaeva
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
| | - Kristina A. Malsagova
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
| | - Tatyana O. Pleshakova
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
| | - Rafael A. Galiullin
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
| | - Vladimir P. Popov
- Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia;
| | - Nikolay E. Kushlinskii
- N.N. Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia; (N.E.K.); (A.A.A.)
| | - Alexander A. Alferov
- N.N. Blokhin National Medical Research Center of Oncology, 115478 Moscow, Russia; (N.E.K.); (A.A.A.)
| | - Dmitry V. Enikeev
- Institute of Urology and Reproductive Health, Sechenov University, 119992 Moscow, Russia; (D.V.E.); (N.V.P.)
| | - Natalia V. Potoldykova
- Institute of Urology and Reproductive Health, Sechenov University, 119992 Moscow, Russia; (D.V.E.); (N.V.P.)
| | - Alexander I. Archakov
- Laboratory of Nanobiotechnology, Institute of Biomedical Chemistry, 119121 Moscow, Russia; (K.V.G.); (K.A.M.); (T.O.P.); (R.A.G.); (A.I.A.)
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4
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Uribe J, Traberg WC, Hama A, Druet V, Mohamed Z, Ooi A, Pappa AM, Huerta M, Inal S, Owens RM, Daniel S. Dual Mode Sensing of Binding and Blocking of Cancer Exosomes to Biomimetic Human Primary Stem Cell Surfaces. ACS Biomater Sci Eng 2021; 7:5585-5597. [PMID: 34802228 DOI: 10.1021/acsbiomaterials.1c01056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cancer-derived exosomes (cEXOs) facilitate transfer of information between tumor and human primary stromal cells, favoring cancer progression. Although the mechanisms used during this information exchange are still not completely understood, it is known that binding is the initial contact established between cEXOs and cells. Hence, studying binding and finding strategies to block it are of great therapeutic value. However, such studies are challenging for a variety of reasons, including the need for human primary cell culture, the difficulty in decoupling and isolating binding from internalization and cargo delivery, and the lack of techniques to detect these specific interactions. In this work, we created a supported biomimetic stem cell membrane incorporating membrane components from human primary adipose-derived stem cells (ADSCs). We formed the supported membrane on glass and on multielectrode arrays to offer the dual option of optical or electrical detection of cEXO binding to the membrane surface. Using our platform, we show that cEXOs bind to the stem cell membrane and that binding is blocked when an antibody to integrin β1, a component of ADSC surface, is exposed to the membrane surface prior to cEXOs. To test the biological outcome of blocking this interaction, we first confirm that adding cEXOs to cultured ADSCs leads to the upregulation of vascular endothelial growth factor, a measure of proangiogenic activity. Next, when ADSCs are first blocked with anti-integrin β1 and then exposed to cEXOs, the upregulation of proangiogenic activity and cell proliferation are significantly reduced. This biomimetic membrane platform is the first cell-free label-free in vitro platform for the recapitulation and study of cEXO binding to human primary stem cells with potential for therapeutic molecule screening as it is compatible with scale-up and multiplexing.
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Affiliation(s)
- Johana Uribe
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853-0001, United States
| | - Walther C Traberg
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
| | - Adel Hama
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 3955, Kingdom of Saudi Arabia
| | - Victor Druet
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 3955, Kingdom of Saudi Arabia
| | - Zeinab Mohamed
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853-0001, United States
| | - Amanda Ooi
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 3955, Kingdom of Saudi Arabia
| | - Anna-Maria Pappa
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom.,Department of Biomedical Engineering, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Miriam Huerta
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853-5201, United States
| | - Sahika Inal
- Biological and Environmental Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 3955, Kingdom of Saudi Arabia
| | - Róisín M Owens
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom
| | - Susan Daniel
- Meinig School of Biomedical Engineering, Cornell University, Ithaca, New York 14853-0001, United States.,School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York 14853-5201, United States
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Trybala E, Peerboom N, Adamiak B, Krzyzowska M, Liljeqvist JÅ, Bally M, Bergström T. Herpes Simplex Virus Type 2 Mucin-Like Glycoprotein mgG Promotes Virus Release from the Surface of Infected Cells. Viruses 2021; 13:v13050887. [PMID: 34065826 PMCID: PMC8150390 DOI: 10.3390/v13050887] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/05/2021] [Accepted: 05/08/2021] [Indexed: 01/08/2023] Open
Abstract
The contribution of virus components to liberation of herpes simplex virus type 2 (HSV-2) progeny virions from the surface of infected cells is poorly understood. We report that the HSV-2 mutant deficient in the expression of a mucin-like membrane-associated glycoprotein G (mgG) exhibited defect in the release of progeny virions from infected cells manifested by ~2 orders of magnitude decreased amount of infectious virus in a culture medium as compared to native HSV-2. Electron microscopy revealed that the mgG deficient virions were produced in infected cells and present at the cell surface. These virions could be forcibly liberated to a nearly native HSV-2 level by the treatment of cells with glycosaminoglycan (GAG)-mimicking oligosaccharides. Comparative assessment of the interaction of mutant and native virions with surface-immobilized chondroitin sulfate GAG chains revealed that while the mutant virions associated with GAGs ~fourfold more extensively, the lateral mobility of bound virions was much poorer than that of native virions. These data indicate that the mgG of HSV-2 balances the virus interaction with GAG chains, a feature critical to prevent trapping of the progeny virions at the surface of infected cells.
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Affiliation(s)
- Edward Trybala
- Department of Infectious Diseases, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, SE-413 46 Göteborg, Sweden; (E.T.); (B.A.); (M.K.); (J.-Å.L.)
| | - Nadia Peerboom
- Department of Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;
| | - Beata Adamiak
- Department of Infectious Diseases, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, SE-413 46 Göteborg, Sweden; (E.T.); (B.A.); (M.K.); (J.-Å.L.)
| | - Malgorzata Krzyzowska
- Department of Infectious Diseases, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, SE-413 46 Göteborg, Sweden; (E.T.); (B.A.); (M.K.); (J.-Å.L.)
| | - Jan-Åke Liljeqvist
- Department of Infectious Diseases, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, SE-413 46 Göteborg, Sweden; (E.T.); (B.A.); (M.K.); (J.-Å.L.)
| | - Marta Bally
- Department of Clinical Microbiology, Umeå University, SE-901 85 Umeå, Sweden;
- Wallenberg Centre for Molecular Medicine, Umeå University, SE-901 85 Umeå, Sweden
| | - Tomas Bergström
- Department of Infectious Diseases, Section for Clinical Virology, Institute of Biomedicine, University of Gothenburg, SE-413 46 Göteborg, Sweden; (E.T.); (B.A.); (M.K.); (J.-Å.L.)
- Correspondence:
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6
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A Survey of Analytical Techniques for Noroviruses. Foods 2020; 9:foods9030318. [PMID: 32164213 PMCID: PMC7142446 DOI: 10.3390/foods9030318] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Revised: 03/07/2020] [Accepted: 03/07/2020] [Indexed: 12/17/2022] Open
Abstract
As the leading cause of acute gastroenteritis worldwide, human noroviruses (HuNoVs) have caused around 685 million cases of infection and nearly $60 billion in losses every year. Despite their highly contagious nature, an effective vaccine for HuNoVs has yet to become commercially available. Therefore, rapid detection and subtyping of noroviruses is crucial for preventing viral spread. Over the past half century, there has been monumental progress in the development of techniques for the detection and analysis of noroviruses. However, currently no rapid, portable assays are available to detect and subtype infectious HuNoVs. The purpose of this review is to survey and present different analytical techniques for the detection and characterization of noroviruses.
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Akkilic N, Geschwindner S, Höök F. Single-molecule biosensors: Recent advances and applications. Biosens Bioelectron 2019; 151:111944. [PMID: 31999573 DOI: 10.1016/j.bios.2019.111944] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/26/2019] [Accepted: 11/29/2019] [Indexed: 02/07/2023]
Abstract
Single-molecule biosensors serve the unmet need for real time detection of individual biological molecules in the molecular crowd with high specificity and accuracy, uncovering unique properties of individual molecules which are hidden when measured using ensemble averaging methods. Measuring a signal generated by an individual molecule or its interaction with biological partners is not only crucial for early diagnosis of various diseases such as cancer and to follow medical treatments but also offers a great potential for future point-of-care devices and personalized medicine. This review summarizes and discusses recent advances in nanosensors for both in vitro and in vivo detection of biological molecules offering single-molecule sensitivity. In the first part, we focus on label-free platforms, including electrochemical, plasmonic, SERS-based and spectroelectrochemical biosensors. We review fluorescent single-molecule biosensors in the second part, highlighting nanoparticle-amplified assays, digital platforms and the utilization of CRISPR technology. We finally discuss recent advances in the emerging nanosensor technology of important biological species as well as future perspectives of these sensors.
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Affiliation(s)
- Namik Akkilic
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden.
| | - Stefan Geschwindner
- Structure, Biophysics and Fragment-based Lead Generation, Discovery Sciences, R&D, AstraZeneca, Gothenburg, Sweden
| | - Fredrik Höök
- Department of Applied Physics, Division of Biological Physics, Chalmers University of Technology, Gothenburg, Sweden.
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Nathan L, Daniel S. Single Virion Tracking Microscopy for the Study of Virus Entry Processes in Live Cells and Biomimetic Platforms. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1215:13-43. [PMID: 31317494 PMCID: PMC7122913 DOI: 10.1007/978-3-030-14741-9_2] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The most widely-used assays for studying viral entry, including infectivity, cofloatation, and cell-cell fusion assays, yield functional information but provide low resolution of individual entry steps. Structural characterization provides high-resolution conformational information, but on its own is unable to address the functional significance of these conformations. Single virion tracking microscopy techniques provide more detail on the intermediate entry steps than infection assays and more functional information than structural methods, bridging the gap between these methods. In addition, single virion approaches also provide dynamic information about the kinetics of entry processes. This chapter reviews single virion tracking techniques and describes how they can be applied to study specific virus entry steps. These techniques provide information complementary to traditional ensemble approaches. Single virion techniques may either probe virion behavior in live cells or in biomimetic platforms. Synthesizing information from ensemble, structural, and single virion techniques ultimately yields a more complete understanding of the viral entry process than can be achieved by any single method alone.
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Affiliation(s)
- Lakshmi Nathan
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, USA.
| | - Susan Daniel
- Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY, USA.
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9
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DNA-functionalized photonic crystal microspheres for multiplex detection of toxic metal ions. Colloids Surf B Biointerfaces 2017; 154:142-149. [DOI: 10.1016/j.colsurfb.2017.03.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 02/20/2017] [Accepted: 03/03/2017] [Indexed: 01/23/2023]
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10
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Lee DW, Hsu HL, Bacon KB, Daniel S. Image Restoration and Analysis of Influenza Virions Binding to Membrane Receptors Reveal Adhesion-Strengthening Kinetics. PLoS One 2016; 11:e0163437. [PMID: 27695072 PMCID: PMC5047597 DOI: 10.1371/journal.pone.0163437] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/08/2016] [Indexed: 11/19/2022] Open
Abstract
With the development of single-particle tracking (SPT) microscopy and host membrane mimics called supported lipid bilayers (SLBs), stochastic virus-membrane binding interactions can be studied in depth while maintaining control over host receptor type and concentration. However, several experimental design challenges and quantitative image analysis limitations prevent the widespread use of this approach. One main challenge of SPT studies is the low signal-to-noise ratio of SPT videos, which is sometimes inevitable due to small particle sizes, low quantum yield of fluorescent dyes, and photobleaching. These situations could render current particle tracking software to yield biased binding kinetic data caused by intermittent tracking error. Hence, we developed an effective image restoration algorithm for SPT applications called STAWASP that reveals particles with a signal-to-noise ratio of 2.2 while preserving particle features. We tested our improvements to the SPT binding assay experiment and imaging procedures by monitoring X31 influenza virus binding to α2,3 sialic acid glycolipids. Our interests lie in how slight changes to the peripheral oligosaccharide structures can affect the binding rate and residence times of viruses. We were able to detect viruses binding weakly to a glycolipid called GM3, which was undetected via assays such as surface plasmon resonance. The binding rate was around 28 folds higher when the virus bound to a different glycolipid called GD1a, which has a sialic acid group extending further away from the bilayer surface than GM3. The improved imaging allowed us to obtain binding residence time distributions that reflect an adhesion-strengthening mechanism via multivalent bonds. We empirically fitted these distributions using a time-dependent unbinding rate parameter, koff, which diverges from standard treatment of koff as a constant. We further explain how to convert these models to fit ensemble-averaged binding data obtained by assays such as surface plasmon resonance.
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Affiliation(s)
- Donald W. Lee
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America
| | - Hung-Lun Hsu
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America
| | - Kaitlyn B. Bacon
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America
| | - Susan Daniel
- School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, New York, United States of America
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11
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Tabaei SR, Jackman JA, Kim M, Yorulmaz S, Vafaei S, Cho NJ. Biomembrane Fabrication by the Solvent-assisted Lipid Bilayer (SALB) Method. J Vis Exp 2015. [PMID: 26650537 PMCID: PMC4692765 DOI: 10.3791/53073] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
In order to mimic cell membranes, the supported lipid bilayer (SLB) is an attractive platform which enables in vitro investigation of membrane-related processes while conferring biocompatibility and biofunctionality to solid substrates. The spontaneous adsorption and rupture of phospholipid vesicles is the most commonly used method to form SLBs. However, under physiological conditions, vesicle fusion (VF) is limited to only a subset of lipid compositions and solid supports. Here, we describe a one-step general procedure called the solvent-assisted lipid bilayer (SALB) formation method in order to form SLBs which does not require vesicles. The SALB method involves the deposition of lipid molecules onto a solid surface in the presence of water-miscible organic solvents (e.g., isopropanol) and subsequent solvent-exchange with aqueous buffer solution in order to trigger SLB formation. The continuous solvent exchange step enables application of the method in a flow-through configuration suitable for monitoring bilayer formation and subsequent alterations using a wide range of surface-sensitive biosensors. The SALB method can be used to fabricate SLBs on a wide range of hydrophilic solid surfaces, including those which are intractable to vesicle fusion. In addition, it enables fabrication of SLBs composed of lipid compositions which cannot be prepared using the vesicle fusion method. Herein, we compare results obtained with the SALB and conventional vesicle fusion methods on two illustrative hydrophilic surfaces, silicon dioxide and gold. To optimize the experimental conditions for preparation of high quality bilayers prepared via the SALB method, the effect of various parameters, including the type of organic solvent in the deposition step, the rate of solvent exchange, and the lipid concentration is discussed along with troubleshooting tips. Formation of supported membranes containing high fractions of cholesterol is also demonstrated with the SALB method, highlighting the technical capabilities of the SALB technique for a wide range of membrane configurations.
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Affiliation(s)
- Seyed R Tabaei
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University
| | - Joshua A Jackman
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University
| | - Minchul Kim
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University
| | - Saziye Yorulmaz
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University
| | - Setareh Vafaei
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University
| | - Nam-Joon Cho
- School of Materials Science and Engineering, Nanyang Technological University; Centre for Biomimetic Sensor Science, Nanyang Technological University; School of Chemical and Biomedical Engineering, Nanyang Technological University;
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12
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Hagström AEV, Garvey G, Paterson AS, Dhamane S, Adhikari M, Estes MK, Strych U, Kourentzi K, Atmar RL, Willson RC. Sensitive detection of norovirus using phage nanoparticle reporters in lateral-flow assay. PLoS One 2015; 10:e0126571. [PMID: 25978622 PMCID: PMC4433186 DOI: 10.1371/journal.pone.0126571] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 04/06/2015] [Indexed: 12/21/2022] Open
Abstract
Noroviruses are recognized worldwide as the principal cause of acute, non-bacterial gastroenteritis, resulting in 19-21 million cases of disease every year in the United States. Noroviruses have a very low infectious dose, a short incubation period, high resistance to traditional disinfection techniques and multiple modes of transmission, making early, point-of-care detection essential for controlling the spread of the disease. The traditional diagnostic tools, electron microscopy, RT-PCR and ELISA require sophisticated and expensive instrumentation, and are considered too laborious and slow to be useful during severe outbreaks. In this paper we describe the development of a new, rapid and sensitive lateral-flow assay using labeled phage particles for the detection of the prototypical norovirus GI.1 (Norwalk), with a limit of detection of 107 virus-like particles per mL, one hundred-fold lower than a conventional gold nanoparticle lateral-flow assay using the same antibody pair.
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Affiliation(s)
- Anna E. V. Hagström
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, United States of America
| | - Gavin Garvey
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, United States of America
| | - Andrew S. Paterson
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, United States of America
| | - Sagar Dhamane
- Department of Biology and Biochemistry, University of Houston, Houston, Texas, United States of America
| | - Meena Adhikari
- Department of Biology and Biochemistry, University of Houston, Houston, Texas, United States of America
| | - Mary K. Estes
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ulrich Strych
- Department of Biology and Biochemistry, University of Houston, Houston, Texas, United States of America
| | - Katerina Kourentzi
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, United States of America
| | - Robert L. Atmar
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Medicine, Baylor College of Medicine, Houston, Texas, United States of America
| | - Richard C. Willson
- Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas, United States of America
- Department of Biology and Biochemistry, University of Houston, Houston, Texas, United States of America
- Houston Methodist Research Institute, Houston, Texas, United States of America
- Tecnológico de Monterrey, Departamento de Biotecnología e Ingeniería de Alimentos, Centro de Biotecnología FEMSA, Monterrey, Nuevo León, Mexico
- * E-mail:
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