1
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Schmeltzer AJ, Peterson EM, Harris JM, Lathrop DK, German SR, White HS. Simultaneous Multipass Resistive-Pulse Sensing and Fluorescence Imaging of Liposomes. ACS NANO 2024; 18:7241-7252. [PMID: 38377597 DOI: 10.1021/acsnano.3c12627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Simultaneous multipass resistive-pulse sensing and fluorescence imaging have been used to correlate the size and fluorescence intensity of individual E. coli lipid liposomes composed of E. coli polar lipid extracts labeled with membrane-bound 3,3-dioctadecyloxacarbocyanine (DiO) fluorescent molecules. Here, a nanopipet serves as a waveguide to direct excitation light to the resistive-pulse sensing zone at the end of the nanopipet tip. Individual DiO-labeled liposomes (>50 nm radius) were multipassed back and forth through the orifices of glass nanopipets' 110-150 nm radius via potential switching to obtain subnanometer sizing precision, while recording the fluorescence intensity of the membrane-bound DiO molecules. Fluorescence was measured as a function of liposome radius and found to be approximately proportional to the total membrane surface area. The observed relationship between liposome size and fluorescence intensity suggests that multivesicle liposomes emit greater fluorescence compared to unilamellar liposomes, consistent with all lipid membranes of the multivesicle liposomes containing DiO. Fluorescent and nonfluorescent liposomes are readily distinguished from each other in the same solution using simultaneous multipass resistive-pulse sensing and fluorescence imaging. A fluorescence "dead zone" of ∼1 μm thickness just outside of the nanopipet orifice was observed during resistive-pulse sensing, resulting in "on/off" fluorescent behavior during liposome multipassing.
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Affiliation(s)
| | - Eric M Peterson
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Joel M Harris
- Department of Chemistry, University of Utah; Salt Lake City, Utah 84112, United States
| | - Daniel K Lathrop
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Sean R German
- Electronic BioSciences, Inc., 421 Wakara Way, Suite 328, Salt Lake City, Utah 84108, United States
| | - Henry S White
- Department of Chemistry, University of Utah; Salt Lake City, Utah 84112, United States
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2
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Murakami K, Kubota SI, Tanaka K, Tanaka H, Akabane K, Suzuki R, Shinohara Y, Takei H, Hashimoto S, Tanaka Y, Hojyo S, Sakamoto O, Naono N, Takaai T, Sato K, Kojima Y, Harada T, Hattori T, Fuke S, Yokota I, Konno S, Washio T, Fukuhara T, Teshima T, Taniguchi M, Murakami M. High-precision rapid testing of omicron SARS-CoV-2 variants in clinical samples using AI-nanopore. LAB ON A CHIP 2023; 23:4909-4918. [PMID: 37877206 DOI: 10.1039/d3lc00572k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
A digital platform that can rapidly and accurately diagnose pathogenic viral variants, including SARS-CoV-2, will minimize pandemics, public anxiety, and economic losses. We recently reported an artificial intelligence (AI)-nanopore platform that enables testing for Wuhan SARS-CoV-2 with high sensitivity and specificity within five minutes. However, which parts of the virus are recognized by the platform are unknown. Similarly, whether the platform can detect SARS-CoV-2 variants or the presence of the virus in clinical samples needs further study. Here, we demonstrated the platform can distinguish SARS-CoV-2 variants. Further, it identified mutated Wuhan SARS-CoV-2 expressing spike proteins of the delta and omicron variants, indicating it discriminates spike proteins. Finally, we used the platform to identify omicron variants with a sensitivity and specificity of 100% and 94%, respectively, in saliva specimens from COVID-19 patients. Thus, our results demonstrate the AI-nanopore platform is an effective diagnostic tool for SARS-CoV-2 variants.
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Affiliation(s)
- Kaoru Murakami
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Group of Quantum immunology, Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - Shimpei I Kubota
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Group of Quantum immunology, Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - Kumiko Tanaka
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
| | - Hiroki Tanaka
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
| | - Keiichiroh Akabane
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
| | - Rigel Suzuki
- Department of Microbiology and Immunology, Graduate School of Medicine, Hokkaido University, Sapporo, 060-0815, Japan
| | - Yuta Shinohara
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
| | - Hiroyasu Takei
- Aipore Inc., 26-1 Sakuragaokacho, Shibuya, Tokyo 150-8512, Japan
| | - Shigeru Hashimoto
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
| | - Yuki Tanaka
- Group of Quantum immunology, Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - Shintaro Hojyo
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Group of Quantum immunology, Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
| | - Osamu Sakamoto
- Aipore Inc., 26-1 Sakuragaokacho, Shibuya, Tokyo 150-8512, Japan
| | - Norihiko Naono
- Aipore Inc., 26-1 Sakuragaokacho, Shibuya, Tokyo 150-8512, Japan
| | - Takayui Takaai
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, 567-0047, Osaka, Japan
| | - Kazuki Sato
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Yuichi Kojima
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Toshiyuki Harada
- Department of Respiratory Medicine, Japan Community Healthcare Organization Hokkaido Hospital, Sapporo, 062-8618, Japan
| | - Takeshi Hattori
- Department of Respiratory Medicine, Hokkaido Medical Center, National Hospital Organization, Sapporo, 063-0005, Japan
| | - Satoshi Fuke
- Department of Respiratory Medicine, KKR Sapporo Medical Center, Sapporo, 062-0931, Japan
| | - Isao Yokota
- Department of Biostatistics, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Satoshi Konno
- Department of Respiratory Medicine, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Takashi Washio
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, 567-0047, Osaka, Japan
| | - Takasuke Fukuhara
- Department of Microbiology and Immunology, Graduate School of Medicine, Hokkaido University, Sapporo, 060-0815, Japan
| | - Takanori Teshima
- Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo, 060-8638, Japan
- Department of Hematology, Faculty of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, 567-0047, Osaka, Japan
| | - Masaaki Murakami
- Molecular Psychoimmunology, Institute for Genetic Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-0815, Japan
- Group of Quantum immunology, Institute for Quantum Life Science, National Institute for Quantum and Radiological Science and Technology (QST), Chiba 263-8555, Japan
- Institute for Vaccine Research and Development (HU-IVReD), Hokkaido University, Sapporo 001-0020, Japan
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3
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Ogundiran AI, Chang TL, Ivanov A, Kumari N, Nekhai S, Chandran PL. Shear-reversible clusters of HIV-1 in solution: stabilized by antibodies, dispersed by mucin. J Virol 2023; 97:e0075223. [PMID: 37712704 PMCID: PMC10617397 DOI: 10.1128/jvi.00752-23] [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: 05/22/2023] [Accepted: 07/03/2023] [Indexed: 09/16/2023] Open
Abstract
IMPORTANCE The phenomenon of reversible clustering is expected to further nuance HIV immune stealth because virus surfaces can escape interaction with antibodies (Abs) by hiding temporarily within clusters. It is well known that mucin reduces HIV virulence, and the current perspective is that mucin aggregates HIV-1 to reduce infections. Our findings, however, suggest that mucin is dispersing HIV clusters. The study proposes a new paradigm for how HIV-1 may broadly evade Ab recognition with reversible clustering and why mucin effectively neutralizes HIV-1.
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Affiliation(s)
- Ayobami I. Ogundiran
- Department of Chemical Engineering, College of Engineering and Architecture, Howard University, Washington, DC, USA
| | - Tzu-Lan Chang
- Department of Chemical Engineering, College of Engineering and Architecture, Howard University, Washington, DC, USA
| | - Andrey Ivanov
- Center for Sickle Cell Disease, College of Medicine, Howard University, Washington, DC, USA
| | - Namita Kumari
- Center for Sickle Cell Disease, College of Medicine, Howard University, Washington, DC, USA
- Department of Medicine, College of Medicine, Howard University, Washington, DC, USA
| | - Sergei Nekhai
- Center for Sickle Cell Disease, College of Medicine, Howard University, Washington, DC, USA
- Department of Medicine, College of Medicine, Howard University, Washington, DC, USA
| | - Preethi L. Chandran
- Department of Chemical Engineering, College of Engineering and Architecture, Howard University, Washington, DC, USA
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4
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Kitta K, Sakamoto M, Hayakawa K, Nukazuka A, Kano K, Yamamoto T. Nanopore Impedance Spectroscopy Reveals Electrical Properties of Single Nanoparticles for Detecting and Identifying Pathogenic Viruses. ACS OMEGA 2023; 8:14684-14693. [PMID: 37125101 PMCID: PMC10134219 DOI: 10.1021/acsomega.3c00628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/17/2023] [Indexed: 05/03/2023]
Abstract
In the conventional nanopore method, direct current (DC) is used to study molecules and nanoparticles; however, it cannot easily discriminate between materials with similarly sized particles. Herein, we developed an alternating current (AC)-based nanopore method to measure the impedance of a single nanoparticle and distinguish between particles of the same size based on their material characteristics. We demonstrated the performance of this method using impedance measurements to determine the size and frequency characteristics of various particles, ranging in diameter from 200 nm to 1 μm. Furthermore, the alternating current method exhibited high accuracy for biosensing applications, identifying viruses with over 85% accuracy using single-particle measurement and machine learning. Therefore, this novel nanopore method is useful for applications in materials science, biology, and medicine.
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Affiliation(s)
- Kazuki Kitta
- Mechanical
Engineering, Tokyo Institute of Technology, Ishikawadai 1-314, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Maami Sakamoto
- Mechanical
Engineering, Tokyo Institute of Technology, Ishikawadai 1-314, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
| | - Kei Hayakawa
- Material
Research and Innovation Division, DENSO
CORPORATION, 1-1 Showa-cho, Kariya, Aichi 448-8661, Japan
| | - Akira Nukazuka
- Material
Research and Innovation Division, DENSO
CORPORATION, 1-1 Showa-cho, Kariya, Aichi 448-8661, Japan
| | - Kazuhiko Kano
- Material
Research and Innovation Division, DENSO
CORPORATION, 1-1 Showa-cho, Kariya, Aichi 448-8661, Japan
| | - Takatoki Yamamoto
- Mechanical
Engineering, Tokyo Institute of Technology, Ishikawadai 1-314, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550, Japan
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5
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O’Donohue M, Saharia J, Bandara N, Alexandrakis G, Kim MJ. Use of a solid-state nanopore for profiling the transferrin receptor protein and distinguishing between transferrin receptor and its ligand protein. Electrophoresis 2023; 44:349-359. [PMID: 36401829 PMCID: PMC9839655 DOI: 10.1002/elps.202200147] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 10/20/2022] [Accepted: 11/17/2022] [Indexed: 11/20/2022]
Abstract
A nanopore device is capable of providing single-molecule level information of an analyte as they translocate through the sensing aperture-a nanometer-sized through-hole-under the influence of an applied electric field. In this study, a silicon nitride (Six Ny )-based nanopore was used to characterize the human serum transferrin receptor protein (TfR) under various applied voltages. The presence of dimeric forms of TfR was found to decrease exponentially as the applied electric field increased. Further analysis of monomeric TfR also revealed that its unfolding behaviors were positively dependent on the applied voltage. Furthermore, a comparison between the data of monomeric TfR and its ligand protein, human serum transferrin (hSTf), showed that these two protein populations, despite their nearly identical molecular weights, could be distinguished from each other by means of a solid-state nanopore (SSN). Lastly, the excluded volumes of TfR were experimentally determined at each voltage and were found to be within error of their theoretical values. The results herein demonstrate the successful application of an SSN for accurately classifying monomeric and dimeric molecules while the two populations coexist in a heterogeneous mixture.
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Affiliation(s)
- Matthew O’Donohue
- Applied Science Program, Southern Methodist University, Dallas, TX 75275, USA
| | - Jugal Saharia
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX 75275, USA
| | - Nuwan Bandara
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX 75275, USA
| | - Georgios Alexandrakis
- Department of Bioengineering, University of Texas at Arlington, Arlington, TX 76019, USA
| | - Min Jun Kim
- Applied Science Program, Southern Methodist University, Dallas, TX 75275, USA
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX 75275, USA
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6
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Ju Y, Pu M, Sun K, Song G, Geng J. Nanopore Electrochemistry for Pathogen Detection. Chem Asian J 2022; 17:e202200774. [PMID: 36069587 DOI: 10.1002/asia.202200774] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 09/06/2022] [Indexed: 11/05/2022]
Abstract
Pathogen infections have seriously threatened human health, and there is an urgent demand for rapid and efficient pathogen identification to provide instructions in clinical diagnosis and therapeutic intervention. Recently, nanopore technology, a rapidly maturing technology which delivers ultrasensitive sensing and high throughput in real-time and at low cost, has achieved success in pathogen detection. Furthermore, the remarkable development of nanopore sequencing, for example, the MinION sequencer from Oxford Nanopore Technologies (ONT) as a competitive sequencing technology, has facilitated the rapid analysis of disease-related microbiomes at the whole-genome level and on a large scale. Here, we highlighted recent advances in nanopore approaches for pathogen detection at the single-molecule level. We also overviewed the applications of nanopore sequencing in pathogenic bacteria identification and diagnosis. In the end, we discussed the challenges and future developments of nanopore technology as promising tools for the management of infections, which may be helpful to aid understanding as well as decision-making.
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Affiliation(s)
- Yuan Ju
- Sichuan University, Sichuan University Library, CHINA
| | - Mengjun Pu
- Sichuan University, Department of Laboratory Medicine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, CHINA
| | - Ke Sun
- Sichuan University, Department of Laboratory Medicine, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University and Collaborative Innovation Center, CHINA
| | - Guiqin Song
- North Sichuan Medical College [Search North Sichuan Medical College]: North Sichuan Medical University, Shool of Basic Medical Sciences and Forensic Medicine, CHINA
| | - Jia Geng
- Sichuan University, State Key Laboratory of Biotherapy, No 17 Section 3 of South Renmin Rd, 610040, Chengdu, CHINA
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7
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Probing the Hepatitis B Virus E-Antigen with a Nanopore Sensor Based on Collisional Events Analysis. BIOSENSORS 2022; 12:bios12080596. [PMID: 36004992 PMCID: PMC9405897 DOI: 10.3390/bios12080596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 07/29/2022] [Accepted: 08/03/2022] [Indexed: 11/24/2022]
Abstract
Real-time monitoring, simple operation, and cheaper methods for detecting immunological proteins hold the potential for a solid influence on proteomics and human biology, as they can promote the onset of timely diagnoses and adequate treatment protocols. In this work we present an exploratory study suggesting the applicability of resistive-pulse sensing technology in conjunction with the α-hemolysin (α-HL) protein nanopore, for the detection of the chronic hepatitis B virus (HBV) e-antigen (HBeAg). In this approach, the recognition between HBeAg and a purified monoclonal hepatitis B e antibody (Ab(HBeAg)) was detected via transient ionic current spikes generated by partial occlusions of the α-HL nanopore by protein aggregates electrophoretically driven toward the nanopore’s vestibule entrance. Despite the steric hindrance precluding antigen, antibody, or antigen–antibody complex capture inside the nanopore, their stochastic bumping with the nanopore generated clear transient blockade events. The subsequent analysis suggested the detection of protein subpopulations in solution, rendering the approach a potentially valuable label-free platform for the sensitive, submicromolar-scale screening of HBeAg targets.
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8
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Ying C, Houghtaling J, Mayer M. Effects of off-axis translocation through nanopores on the determination of shape and volume estimates for individual particles. NANOTECHNOLOGY 2022; 33:275501. [PMID: 35320779 DOI: 10.1088/1361-6528/ac6087] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Resistive pulses generated by nanoparticles that translocate through a nanopore contain multi-parametric information about the physical properties of those particles. For example, non-spherical particles sample several different orientations during translocation, producing fluctuations in blockade current that relate to their shape. Due to the heterogenous distribution of electric field from the center to the wall of a nanopore while a particle travels through the pore, its radial position influences the blockade current, thereby affecting the quantification of parameters related to the particle's characteristics. Here, we investigate the influence of these off-axis effects on parameters estimated by performing finite element simulations of dielectric particles transiting a cylindrical nanopore. We varied the size, ellipsoidal shape, and radial position of individual particles, as well as the size of the nanopore. As expected, nanoparticles translocating near the nanopore wall produce increase current blockades, resulting in overestimates of particle volume. We demonstrated that off-axis effects also influence estimates of shape determined from resistive pulse analyses, sometimes producing a multiple-fold deviation in ellipsoidal length-to-diameter ratio between estimates and reference values. By using a nanopore with the minimum possible diameter that still allows the particle to rotate while translocating, off-axis effects on the determination of both volume and shape can be minimized. In addition, tethering the nanoparticles to a fluid coating on the nanopore wall makes it possible to determine an accurate particle shape with an overestimated volume. This work provides a framework to select optimal ratios of nanopore to nanoparticle size for experiments targeting free translocations.
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Affiliation(s)
- Cuifeng Ying
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
- Advanced Optics and Photonics Laboratory, Department of Engineering, School of Science &Technology, Nottingham Trent University, Nottingham, United Kingdom
| | - Jared Houghtaling
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
| | - Michael Mayer
- Adolphe Merkle Institute, University of Fribourg, Fribourg, Switzerland
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9
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Saharia J, Bandara YMNDY, Kim MJ. Investigating protein translocation in the presence of an electrolyte concentration gradient across a solid-state nanopore. Electrophoresis 2022; 43:785-792. [PMID: 35020223 DOI: 10.1002/elps.202100346] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/19/2021] [Accepted: 12/22/2021] [Indexed: 12/21/2022]
Abstract
Electrolyte chemistry plays an important role in the transport properties of analytes through nanopores. Here, we report the translocation properties of the protein human serum transferrin (hSTf) in asymmetric LiCl salt concentrations with either positive (Ctrans /Ccis < 1) or negative chemical gradients (Ctrans /Ccis > 1). The cis side concentration was fixed at 4 M for positive chemical gradients and at 0.5 M LiCl for negative chemical gradients, while the trans side concentration varied between 0.5 to 4 M which resulted in six different configurations, respectively, for both positive and negative gradient types. For positive chemical gradient conditions, translocations were observed in all six configurations for at least one voltage polarity whereas with negative gradient conditions, dead concentrations where no events at either polarity were observed. The flux of Li+ and Cl- ions and their resultant cation or anion enrichment zones, as well as the interplay of electrophoretic and electroosmotic transport directions, would determine whether hSTf can traverse across the pore.
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Affiliation(s)
- Jugal Saharia
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
| | - Y M Nuwan D Y Bandara
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA.,Department of Bioengineering, University of California, Riverside, CA, USA
| | - Min Jun Kim
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
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10
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Abstract
Cost-effective, rapid, and accurate virus detection technologies play key roles in reducing viral transmission. Prompt and accurate virus detection enables timely treatment and effective quarantine of virus carrier, and therefore effectively reduces the possibility of large-scale spread. However, conventional virus detection techniques often suffer from slow response, high cost or sophisticated procedures. Recently, two-dimensional (2D) materials have been used as promising sensing platforms for the high-performance detection of a variety of chemical and biological substances. The unique properties of 2D materials, such as large specific area, active surface interaction with biomolecules and facile surface functionalization, provide advantages in developing novel virus detection technologies with fast response and high sensitivity. Furthermore, 2D materials possess versatile and tunable electronic, electrochemical and optical properties, making them ideal platforms to demonstrate conceptual sensing techniques and explore complex sensing mechanisms in next-generation biosensors. In this review, we first briefly summarize the virus detection techniques with an emphasis on the current efforts in fighting again COVID-19. Then, we introduce the preparation methods and properties of 2D materials utilized in biosensors, including graphene, transition metal dichalcogenides (TMDs) and other 2D materials. Furthermore, we discuss the working principles of various virus detection technologies based on emerging 2D materials, such as field-effect transistor-based virus detection, electrochemical virus detection, optical virus detection and other virus detection techniques. Then, we elaborate on the essential works in 2D material-based high-performance virus detection. Finally, our perspective on the challenges and future research direction in this field is discussed.
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11
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Leong IW, Tsutsui M, Yokota K, Taniguchi M. Salt Gradient Control of Translocation Dynamics in a Solid-State Nanopore. Anal Chem 2021; 93:16700-16708. [PMID: 34860500 DOI: 10.1021/acs.analchem.1c04342] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tuning capture rates and translocation time of analytes in solid-state nanopores are one of the major challenges for their use in detecting and analyzing individual nanoscale objects via ionic current measurements. Here, we report on the use of salt gradient for the fine control of capture-to-translocation dynamics in 300 nm sized SiNx nanopores. We demonstrated a decrease up to a factor of 3 in the electrophoretic speed of nanoparticles at the pore exit along with an over 3-fold increase in particle detection efficiency by subjecting a 5-fold ion concentration difference across the dielectric membrane. The improvement in the sensor performance was elucidated to be a result of the salt-gradient-mediated electric field and electroosmotic flow asymmetry at nanochannel orifices. The present findings can be used to enhance nanopore sensing capability for detecting biomolecules such as amyloids and proteins.
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Affiliation(s)
- Iat Wai Leong
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Makusu Tsutsui
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Kazumichi Yokota
- National Institute of Advanced Industrial Science and Technology, Takamatsu, Kagawa 761-0395, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
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12
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Akhtarian S, Miri S, Doostmohammadi A, Brar SK, Rezai P. Nanopore sensors for viral particle quantification: current progress and future prospects. Bioengineered 2021; 12:9189-9215. [PMID: 34709987 PMCID: PMC8810133 DOI: 10.1080/21655979.2021.1995991] [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: 09/09/2021] [Revised: 10/16/2021] [Accepted: 10/16/2021] [Indexed: 12/24/2022] Open
Abstract
Rapid, inexpensive, and laboratory-free diagnostic of viral pathogens is highly critical in controlling viral pandemics. In recent years, nanopore-based sensors have been employed to detect, identify, and classify virus particles. By tracing ionic current containing target molecules across nano-scale pores, nanopore sensors can recognize the target molecules at the single-molecule level. In the case of viruses, they enable discrimination of individual viruses and obtaining important information on the physical and chemical properties of viral particles. Despite classical benchtop virus detection methods, such as amplification techniques (e.g., PCR) or immunological assays (e.g., ELISA), that are mainly laboratory-based, expensive and time-consuming, nanopore-based sensing methods can enable low-cost and real-time point-of-care (PoC) and point-of-need (PoN) monitoring of target viruses. This review discusses the limitations of classical virus detection methods in PoN virus monitoring and then provides a comprehensive overview of nanopore sensing technology and its emerging applications in quantifying virus particles and classifying virus sub-types. Afterward, it discusses the recent progress in the field of nanopore sensing, including integrating nanopore sensors with microfabrication technology, microfluidics and artificial intelligence, which have been demonstrated to be promising in developing the next generation of low-cost and portable biosensors for the sensitive recognition of viruses and emerging pathogens.
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Affiliation(s)
- Shiva Akhtarian
- Department of Mechanical Engineering, York University, Toronto, ON, Canada
| | - Saba Miri
- Department of Civil Engineering, York University, Toronto, ON, Canada
| | - Ali Doostmohammadi
- Department of Mechanical Engineering, York University, Toronto, ON, Canada
| | | | - Pouya Rezai
- Department of Mechanical Engineering, York University, Toronto, ON, Canada
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13
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Bandara YMNDY, Saharia J, Karawdeniya BI, Kluth P, Kim MJ. Nanopore Data Analysis: Baseline Construction and Abrupt Change-Based Multilevel Fitting. Anal Chem 2021; 93:11710-11718. [PMID: 34463103 DOI: 10.1021/acs.analchem.1c01646] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Solid-state nanopore technology delivers single-molecule resolution information, and the quality of the deliverables hinges on the capability of the analysis platform to extract maximum possible events and fit them appropriately. In this work, we present an analysis platform with four baseline fitting methods adaptive to a wide range of nanopore traces (including those with a step or abrupt changes where pre-existing platforms fail) to maximize extractable events (2× improvement in some cases) and multilevel event fitting capability. The baseline fitting methods, in the increasing order of robustness and computational cost, include arithmetic mean, linear fit, Gaussian smoothing, and Gaussian smoothing and regressed mixing. The performance was tested with ultra-stable to vigorously fluctuating current profiles, and the event count increased with increasing fitting robustness prominently for vigorously fluctuating profiles. Turning points of events were clustered using the dbscan method, followed by segmentation into preliminary levels based on abrupt changes in the signal level, which were then iteratively refined to deduce the final levels of the event. Finally, we show the utility of clustering for multilevel DNA data analysis, followed by the assessment of protein translocation profiles.
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Affiliation(s)
- Y M Nuwan D Y Bandara
- Department of Electronic Materials Engineering, Research School of Physics, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Jugal Saharia
- Department of Mechanical Engineering, Southern Methodist University, Dallas, Texas 75275, United States
| | - Buddini I Karawdeniya
- Department of Electronic Materials Engineering, Research School of Physics, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Patrick Kluth
- Department of Electronic Materials Engineering, Research School of Physics, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Min Jun Kim
- Department of Mechanical Engineering, Southern Methodist University, Dallas, Texas 75275, United States
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14
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Zeng X, Xiang Y, Liu Q, Wang L, Ma Q, Ma W, Zeng D, Yin Y, Wang D. Nanopore Technology for the Application of Protein Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:1942. [PMID: 34443773 PMCID: PMC8400292 DOI: 10.3390/nano11081942] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/23/2021] [Accepted: 07/27/2021] [Indexed: 01/19/2023]
Abstract
Protein is an important component of all the cells and tissues of the human body and is the material basis of life. Its content, sequence, and spatial structure have a great impact on proteomics and human biology. It can reflect the important information of normal or pathophysiological processes and promote the development of new diagnoses and treatment methods. However, the current techniques of proteomics for protein analysis are limited by chemical modifications, large sample sizes, or cumbersome operations. Solving this problem requires overcoming huge challenges. Nanopore single molecule detection technology overcomes this shortcoming. As a new sensing technology, it has the advantages of no labeling, high sensitivity, fast detection speed, real-time monitoring, and simple operation. It is widely used in gene sequencing, detection of peptides and proteins, markers and microorganisms, and other biomolecules and metal ions. Therefore, based on the advantages of novel nanopore single-molecule detection technology, its application to protein sequence detection and structure recognition has also been proposed and developed. In this paper, the application of nanopore single-molecule detection technology in protein detection in recent years is reviewed, and its development prospect is investigated.
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Affiliation(s)
- Xiaoqing Zeng
- Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China; (X.Z.); (Y.X.); (W.M.)
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Yang Xiang
- Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China; (X.Z.); (Y.X.); (W.M.)
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Qianshan Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Liang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Qianyun Ma
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
- School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, China
| | - Wenhao Ma
- Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, China; (X.Z.); (Y.X.); (W.M.)
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Delin Zeng
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
- School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
| | - Yajie Yin
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
| | - Deqiang Wang
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China; (Q.L.); (L.W.); (Q.M.); (D.Z.)
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, China
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15
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Taniguchi M, Minami S, Ono C, Hamajima R, Morimura A, Hamaguchi S, Akeda Y, Kanai Y, Kobayashi T, Kamitani W, Terada Y, Suzuki K, Hatori N, Yamagishi Y, Washizu N, Takei H, Sakamoto O, Naono N, Tatematsu K, Washio T, Matsuura Y, Tomono K. Combining machine learning and nanopore construction creates an artificial intelligence nanopore for coronavirus detection. Nat Commun 2021; 12:3726. [PMID: 34140500 PMCID: PMC8211865 DOI: 10.1038/s41467-021-24001-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Accepted: 05/28/2021] [Indexed: 02/08/2023] Open
Abstract
High-throughput, high-accuracy detection of emerging viruses allows for the control of disease outbreaks. Currently, reverse transcription-polymerase chain reaction (RT-PCR) is currently the most-widely used technology to diagnose the presence of SARS-CoV-2. However, RT-PCR requires the extraction of viral RNA from clinical specimens to obtain high sensitivity. Here, we report a method for detecting novel coronaviruses with high sensitivity by using nanopores together with artificial intelligence, a relatively simple procedure that does not require RNA extraction. Our final platform, which we call the artificially intelligent nanopore, consists of machine learning software on a server, a portable high-speed and high-precision current measuring instrument, and scalable, cost-effective semiconducting nanopore modules. We show that artificially intelligent nanopores are successful in accurately identifying four types of coronaviruses similar in size, HCoV-229E, SARS-CoV, MERS-CoV, and SARS-CoV-2. Detection of SARS-CoV-2 in saliva specimen is achieved with a sensitivity of 90% and specificity of 96% with a 5-minute measurement.
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Affiliation(s)
- Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan.
| | - Shohei Minami
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Chikako Ono
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Center for Infectious Diseases Education and Research, Osaka University, Suita, Osaka, Japan
| | - Rina Hamajima
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Ayumi Morimura
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan
| | - Shigeto Hamaguchi
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Osaka University Hospital, Osaka University, Suita, Osaka, Japan
| | - Yukihiro Akeda
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan.,Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Osaka University Hospital, Osaka University, Suita, Osaka, Japan
| | - Yuta Kanai
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Takeshi Kobayashi
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Wataru Kamitani
- Graduate School of Medicine, Gunma University, Maebashi, Gunma, Japan
| | - Yutaka Terada
- Center for Vaccine Research, University of Pittsburgh, Pittsburgh, PA, USA
| | - Koichiro Suzuki
- The Research Foundation for Microbial Diseases of Osaka University, Suita, Osaka, Japan
| | - Nobuaki Hatori
- The Research Foundation for Microbial Diseases of Osaka University, Suita, Osaka, Japan
| | - Yoshiaki Yamagishi
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan.,Osaka University Hospital, Osaka University, Suita, Osaka, Japan.,Medical Center for Translational and Clinical Research, Osaka University Hospital, Osaka University, Suita, Osaka, Japan
| | | | | | | | | | - Kenji Tatematsu
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan
| | - Takashi Washio
- The Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, Japan
| | - Yoshiharu Matsuura
- Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan. .,Center for Infectious Diseases Education and Research, Osaka University, Suita, Osaka, Japan.
| | - Kazunori Tomono
- Graduate School of Medicine, Osaka University, Suita, Osaka, Japan. .,Osaka University Hospital, Osaka University, Suita, Osaka, Japan.
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16
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Sethi K, Dailey GP, Zahid OK, Taylor EW, Ruzicka JA, Hall AR. Direct Detection of Conserved Viral Sequences and Other Nucleic Acid Motifs with Solid-State Nanopores. ACS NANO 2021; 15:8474-8483. [PMID: 33914524 PMCID: PMC8801185 DOI: 10.1021/acsnano.0c10887] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The rapid and reliable recognition of nucleic acid sequences is essential to a broad range of fields including genotyping, gene expression analysis, and pathogen screening. For viral detection in particular, the capability is critical for optimal therapeutic response and preventing disease transmission. Here, we report an approach for detecting identifying sequence motifs within genome-scale single-strand DNA and RNA based on solid-state nanopores. By designing DNA oligonucleotide probes with complementarity to target sequences within a target genome, we establish a protocol to yield affinity-tagged duplex molecules the same length as the probe only if the target is present. The product can subsequently be bound to a protein chaperone and analyzed quantitatively with a selective solid-state nanopore assay. We first use a model DNA genome (M13mp18) to validate the approach, showing the successful isolation and detection of multiple target sequences simultaneously. We then demonstrate the protocol for the detection of RNA viruses by identifying and targeting a highly conserved sequence within human immunodeficiency virus (HIV-1B).
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Affiliation(s)
- Komal Sethi
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA
| | - Gabrielle P. Dailey
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Osama K. Zahid
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA
| | - Ethan W. Taylor
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, USA
| | - Jan A. Ruzicka
- Department of Basic Pharmaceutical Sciences, Fred Wilson School of Pharmacy, High Point University, High Point, NC 27268, USA
| | - Adam R. Hall
- Virginia Tech-Wake Forest University School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Winston-Salem, NC 27101, USA
- Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
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17
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Antaw F, Anderson W, Wuethrich A, Trau M. On the Behavior of Nanoparticles beyond the Nanopore Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4772-4782. [PMID: 33870692 DOI: 10.1021/acs.langmuir.0c03083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Recent advances in solid-state and biological nanopore sensors have produced a deluge of analytical techniques for in situ characterization of bio-nano colloidal dispersions; however, the transport forces governing particle movement into and out of the nanopore are not yet fully understood. Herein, we study the motion of particles outside the smaller opening of an elastomeric size-tunable nanopore and relate this motion to existing transport forces known to act on particles within the pore. Subsequently, we develop a combined optoelectronic approach which allows the comparison of both resistive pulse sensing and single particle tracking-based techniques for particle size characterization and, intriguingly, measurements of the ensemble particle motion induced by a combination of particle electrophoresis as well as pressure-driven and electroosmotic flows through the sensor nanopore. We find evidence suggesting that although bulk fluid flow from the pore tends to drive particle motion, in certain circumstances, electrophoretically driven motion can dominate bulk fluid flow-driven motion even at large distances from the pore opening. By permitting direct observation of the behavior of fluids at the nanopore interface, this approach enables a greater understanding of the transport forces acting on particles as they migrate toward and move through nanopore sensors-with implications for future particle characterization systems and for nanopore methods in general.
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Affiliation(s)
- Fiach Antaw
- Centre for Personalized Nanomedicine, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner of College and Cooper Roads (Building 75), Brisbane, Queensland 4072, Australia
| | - Will Anderson
- Centre for Personalized Nanomedicine, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner of College and Cooper Roads (Building 75), Brisbane, Queensland 4072, Australia
| | - Alain Wuethrich
- Centre for Personalized Nanomedicine, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner of College and Cooper Roads (Building 75), Brisbane, Queensland 4072, Australia
| | - Matt Trau
- Centre for Personalized Nanomedicine, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Corner of College and Cooper Roads (Building 75), Brisbane, Queensland 4072, Australia
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18
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Lee JS, Oviedo JP, Bandara YMNDY, Peng X, Xia L, Wang Q, Garcia K, Wang J, Kim MJ, Kim MJ. Detection of nucleotides in hydrated ssDNA via 2D h-BN nanopore with ionic-liquid/salt-water interface. Electrophoresis 2021; 42:991-1002. [PMID: 33570197 DOI: 10.1002/elps.202000356] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/20/2021] [Accepted: 01/30/2021] [Indexed: 02/03/2023]
Abstract
Accomplishing slow translocation speed with high sensitivity has been the most critical mission for solid-state nanopore (SSN) device to electrically detect nucleobases in ssDNA. In this study, a method to detect nucleobases of ssDNA using a 2D SSN is introduced by considerably reducing the translocation speed and effectively increasing its sensitivity. The ultra-thin titanium dioxide coated hexagonal boron nitride nanopore was fabricated, along with an ionic-liquid 1-butyl-3-methylimidazolium hexafluorophosphate/2.0 M KCl aqueous (cis/trans) interface, for increasing both the spatial and the temporal resolutions. As the ssDNA molecules entered the nanopore, a brief surge of electrical conductivity occurred, which was followed by multiple resistive pulses from nucleobases during the translocation of ssDNA and another brief current surge flagging the exit of the molecule. The continuous detection of nucleobases using a 2D SSN device is a novel achievement: the water molecules bound to ssDNA increased the molecular conductivity and amplified electrical signals during the translocation. Along with the experiment, computational simulations using COMSOL Multiphysics are presented to explain the pivotal role of water molecules bound to ssDNA to detect nucleobases using a 2D SSN.
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Affiliation(s)
- Jung Soo Lee
- Applied Science Program, Lyle School of Engineering, Southern Methodist University, Dallas, TX, USA
| | - Juan Pablo Oviedo
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | | | - Xin Peng
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA.,Department of Physical Chemistry, University of Science and Technology, Beijing, P. R. China
| | - Longsheng Xia
- Department of Electrical Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Qingxiao Wang
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Kevin Garcia
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA.,Monterrey Institute of Technology and Higher Education, Mexico City, Mexico
| | - Jinguo Wang
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA
| | - Min Jun Kim
- Applied Science Program, Lyle School of Engineering, Southern Methodist University, Dallas, TX, USA.,Deparment of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
| | - Moon Jae Kim
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, USA.,Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX, USA
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19
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Saharia J, Bandara YMNDY, Karawdeniya BI, Alexandrakis G, Kim MJ. Assessment of 1/f noise associated with nanopores fabricated through chemically tuned controlled dielectric breakdown. Electrophoresis 2021; 42:899-909. [PMID: 33340118 DOI: 10.1002/elps.202000285] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/21/2020] [Accepted: 12/14/2020] [Indexed: 02/01/2023]
Abstract
Recently, we developed a fabrication method-chemically-tuned controlled dielectric breakdown (CT-CDB)-that produces nanopores (through thin silicon nitride membranes) surpassing legacy drawbacks associated with solid-state nanopores (SSNs). However, the noise characteristics of CT-CDB nanopores are largely unexplored. In this work, we investigated the 1/f noise of CT-CDB nanopores of varying solution pH, electrolyte type, electrolyte concentration, applied voltage, and pore diameter. Our findings indicate that the bulk Hooge parameter (αb ) is about an order of magnitude greater than SSNs fabricated by transmission electron microscopy (TEM) while the surface Hooge parameter (αs ) is ∼3 order magnitude greater. Theαs of CT-CDB nanopores was ∼5 orders of magnitude greater than theirαb , which suggests that the surface contribution plays a dominant role in 1/f noise. Experiments with DNA exhibited increasing capture rates with pH up to pH ∼8 followed by a drop at pH ∼9 perhaps due to the onset of electroosmotic force acting against the electrophoretic force. The1/f noise was also measured for several electrolytes and LiCl was found to outperform NaCl, KCl, RbCl, and CsCl. The 1/f noise was found to increase with the increasing electrolyte concentration and pore diameter. Taken together, the findings of this work suggest the pH approximate 7-8 range to be optimal for DNA sensing with CT-CDB nanopores.
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Affiliation(s)
- Jugal Saharia
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
| | - Y M Nuwan D Y Bandara
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
| | - Buddini I Karawdeniya
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
| | | | - Min Jun Kim
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, USA
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20
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Yilmaz D, Kaya D, Kececi K, Dinler A. Role of Nanopore Geometry in Particle Resolution by Resistive‐Pulse Sensing. ChemistrySelect 2021. [DOI: 10.1002/slct.202004425] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Durdane Yilmaz
- Nanoscience and Nanoengineering Program Istanbul Medeniyet University İstanbul Turkey
| | - Dila Kaya
- Department of Chemistry Istanbul Medeniyet University İstanbul Turkey
| | - Kaan Kececi
- Department of Chemistry Istanbul Medeniyet University İstanbul Turkey
| | - Ali Dinler
- Department of Mathematics Istanbul Medeniyet University İstanbul Turkey
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21
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Karawdeniya BI, Bandara YMNDY, Khan AI, Chen WT, Vu HA, Morshed A, Suh J, Dutta P, Kim MJ. Adeno-associated virus characterization for cargo discrimination through nanopore responsiveness. NANOSCALE 2020; 12:23721-23731. [PMID: 33231239 PMCID: PMC7735471 DOI: 10.1039/d0nr05605g] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Solid-state nanopore (SSN)-based analytical methods have found abundant use in genomics and proteomics with fledgling contributions to virology - a clinically critical field with emphasis on both infectious and designer-drug carriers. Here we demonstrate the ability of SSN to successfully discriminate adeno-associated viruses (AAVs) based on their genetic cargo [double-stranded DNA (AAVdsDNA), single-stranded DNA (AAVssDNA) or none (AAVempty)], devoid of digestion steps, through nanopore-induced electro-deformation (characterized by relative current change; ΔI/I0). The deformation order was found to be AAVempty > AAVssDNA > AAVdsDNA. A deep learning algorithm was developed by integrating support vector machine with an existing neural network, which successfully classified AAVs from SSN resistive-pulses (characteristic of genetic cargo) with >95% accuracy - a potential tool for clinical and biomedical applications. Subsequently, the presence of AAVempty in spiked AAVdsDNA was flagged using the ΔI/I0 distribution characteristics of the two types for mixtures composed of ∼75 : 25% and ∼40 : 60% (in concentration) AAVempty : AAVdsDNA.
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22
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Berkenbrock JA, Grecco-Machado R, Achenbach S. Microfluidic devices for the detection of viruses: aspects of emergency fabrication during the COVID-19 pandemic and other outbreaks. Proc Math Phys Eng Sci 2020; 476:20200398. [PMID: 33363440 PMCID: PMC7735301 DOI: 10.1098/rspa.2020.0398] [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: 05/19/2020] [Accepted: 10/05/2020] [Indexed: 12/17/2022] Open
Abstract
Extensive testing of populations against COVID-19 has been suggested as a game-changer quest to control the spread of this contagious disease and to avoid further disruption in our social, healthcare and economical systems. Nonetheless, testing millions of people for a new virus brings about quite a few challenges. The development of effective tests for the new coronavirus has become a worldwide task that relies on recent discoveries and lessons learned from past outbreaks. In this work, we review the most recent publications on microfluidics devices for the detection of viruses. The topics of discussion include different detection approaches, methods of signalling and fabrication techniques. Besides the miniaturization of traditional benchtop detection assays, approaches such as electrochemical analyses, field-effect transistors and resistive pulse sensors are considered. For emergency fabrication of quick test kits, the local capabilities must be evaluated, and the joint work of universities, industries, and governments seems to be an unequivocal necessity.
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Affiliation(s)
- José Alvim Berkenbrock
- Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada
| | - Rafaela Grecco-Machado
- Department of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, SK, Canada
| | - Sven Achenbach
- Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, SK, Canada
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23
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D Y Bandara YMN, Saharia J, Karawdeniya BI, Hagan JT, Dwyer JR, Kim MJ. Beyond nanopore sizing: improving solid-state single-molecule sensing performance, lifetime, and analyte scope for omics by targeting surface chemistry during fabrication. NANOTECHNOLOGY 2020; 31:335707. [PMID: 32357346 DOI: 10.1088/1361-6528/ab8f4d] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Solid-state nanopores (SSNs) are single-molecule resolution sensors with a growing footprint in real-time bio-polymer profiling-most prominently, but far from exclusively, DNA sequencing. SSNs accessibility has increased with the advent of controlled dielectric breakdown (CDB), but severe fundamental challenges remain: drifts in open-pore current and (irreversible) analyte sticking. These behaviors impede basic research and device development for commercial applications and can be dramatically exacerbated by the chemical complexity and physical property diversity of different analytes. We demonstrate a SSN fabrication approach attentive to nanopore surface chemistry during pore formation, and thus create nanopores in silicon nitride (SiNx) capable of sensing a wide analyte scope-nucleic acid (double-stranded DNA), protein (holo-human serum transferrin) and glycan (maltodextrin). In contrast to SiNx pores fabricated without this comprehensive approach, the pores are Ohmic in electrolyte, have extremely stable open-pore current during analyte translocation (>1 h) over a broad range of pore diameters ([Formula: see text]3- ∼30 nm) with spontaneous current correction (if current deviation occurs), and higher responsiveness (i.e. inter-event frequency) to negatively charged analytes (∼6.5 × in case of DNA). These pores were fabricated by modifying CDB with a chemical additive-sodium hypochlorite-that resulted in dramatically different nanopore surface chemistry including ∼3 orders of magnitude weaker Ka (acid dissociation constant of the surface chargeable head-groups) compared to CDB pores which is inextricably linked with significant improvements in nanopore performance with respect to CDB pores.
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Affiliation(s)
- Y M Nuwan D Y Bandara
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX 75275, United States of America
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24
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Application of Solid-State Nanopore in Protein Detection. Int J Mol Sci 2020; 21:ijms21082808. [PMID: 32316558 PMCID: PMC7215903 DOI: 10.3390/ijms21082808] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/11/2020] [Accepted: 04/14/2020] [Indexed: 11/17/2022] Open
Abstract
A protein is a kind of major biomacromolecule of life. Its sequence, structure, and content in organisms contains quite important information for normal or pathological physiological process. However, research of proteomics is facing certain obstacles. Only a few technologies are available for protein analysis, and their application is limited by chemical modification or the need for a large amount of sample. Solid-state nanopore overcomes some shortcomings of the existing technology, and has the ability to detect proteins at a single-molecule level, with its high sensitivity and robustness of device. Many works on detection of protein molecules and discriminating structure have been carried out in recent years. Single-molecule protein sequencing techniques based on solid-state nanopore are also been proposed and developed. Here, we categorize and describe these efforts and progress, as well as discuss their advantages and drawbacks.
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Morshed A, Karawdeniya BI, Bandara Y, Kim MJ, Dutta P. Mechanical characterization of vesicles and cells: A review. Electrophoresis 2020; 41:449-470. [PMID: 31967658 PMCID: PMC7567447 DOI: 10.1002/elps.201900362] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 12/05/2019] [Accepted: 12/08/2019] [Indexed: 12/30/2022]
Abstract
Vesicles perform many essential functions in all living organisms. They respond like a transducer to mechanical stress in converting the applied force into mechanical and biological responses. At the same time, both biochemical and biophysical signals influence the vesicular response in bearing mechanical loads. In recent years, liposomes, artificial lipid vesicles, have gained substantial attention from the pharmaceutical industry as a prospective drug carrier which can also serve as an artificial cell-mimetic system. The ability of these vesicles to enter through pores of even smaller size makes them ideal candidates for therapeutic agents to reach the infected sites effectively. Engineering of vesicles with desired mechanical properties that can encapsulate drugs and release as required is the prime challenge in this field. This requirement has led to the modifications of the composition of the bilayer membrane by adding cholesterol, sphingomyelin, etc. In this article, we review the manufacturing and characterization techniques of various artificial/synthetic vesicles. We particularly focus on the electric field-driven characterization techniques to determine different properties of vesicle and its membranes, such as bending rigidity, viscosity, capacitance, conductance, etc., which are indicators of their content and mobility. Similarities and differences between artificial vesicles, natural vesicles, and cells are highlighted throughout the manuscript since most of these artificial vesicles are intended for cell mimetic functions.
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Affiliation(s)
- Adnan Morshed
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920
| | - Buddini Iroshika Karawdeniya
- Department of Mechanical Engineering, Lyle School of Engineering, Southern Methodist University, Dallas, Texas, USA
| | - Y.M.NuwanD.Y. Bandara
- Department of Mechanical Engineering, Lyle School of Engineering, Southern Methodist University, Dallas, Texas, USA
| | - Min Jun Kim
- Department of Mechanical Engineering, Lyle School of Engineering, Southern Methodist University, Dallas, Texas, USA
| | - Prashanta Dutta
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920
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Taniguchi M. Analysis Method of the Ion Current-Time Waveform Obtained from Low Aspect Ratio Solid-state Nanopores. ANAL SCI 2020; 36:161-165. [PMID: 31813895 DOI: 10.2116/analsci.19r009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Low aspect ratio nanopores are expected to be applied to the detection of viruses and bacteria because of their high spatial resolution. Multiphysics simulations have revealed that the ion current-time waveform obtained from low aspect ratio nanopores contains information on not only the volume of viruses and bacteria, but also the structure, surface charge, and flow dynamics. Analysis using machine learning extracts information about these analytes from the ion current-time waveform. The combination of low aspect ratio nanopores, multiphysics simulation, and machine learning has made it possible to distinguish different types of viruses and bacteria with high accuracy.
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Saharia J, Bandara YMNDY, Lee JS, Wang Q, Kim MJ, Kim MJ. Fabrication of hexagonal boron nitride based 2D nanopore sensor for the assessment of electro‐chemical responsiveness of human serum transferrin protein. Electrophoresis 2019; 41:630-637. [DOI: 10.1002/elps.201900336] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2019] [Revised: 10/29/2019] [Accepted: 10/31/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Jugal Saharia
- Department of Mechanical Engineering Lyle School of Engineering Southern Methodist University Dallas Texas USA
| | - Y. M. Nuwan D. Y. Bandara
- Department of Mechanical Engineering Lyle School of Engineering Southern Methodist University Dallas Texas USA
| | - Jung Soo Lee
- Department of Mechanical Engineering Lyle School of Engineering Southern Methodist University Dallas Texas USA
| | - Qingxiao Wang
- Department of Materials Science and Engineering The University of Texas at Dallas Richardson Texas USA
| | - Moon J. Kim
- Department of Materials Science and Engineering The University of Texas at Dallas Richardson Texas USA
| | - Min Jun Kim
- Department of Mechanical Engineering Lyle School of Engineering Southern Methodist University Dallas Texas USA
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D Y Bandara YMN, Tang J, Saharia J, Rogowski LW, Ahn CW, Kim MJ. Characterization of Flagellar Filaments and Flagellin through Optical Microscopy and Label-Free Nanopore Responsiveness. Anal Chem 2019; 91:13665-13674. [PMID: 31525946 DOI: 10.1021/acs.analchem.9b02874] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In this study, we investigated the translocation characteristics of flagellar filaments (Salmonella typhimurium) and flagellin subunits through silicon nitride nanopores in tandem with optical microscopy analysis. Even though untagged flagella are dark to the optical method, the label-free nature of the nanopore sensor allows it to characterize both tagged (Cy3) and pristine forms of flagella (including real-time developments). Flagella were depolymerized to flagellin subunits at ∼65 °C (most commonly reported temperature), ∼70 °C, ∼75 °C, and ∼80 °C to investigate the effect of temperature (Tdepol) on depolymerization. The change in conductance (ΔG) profiles corresponding to Tdepol ∼65 °C and ∼70 °C were bracketed within the flagellin monomer profile whereas those of ∼75 °C and ∼80 °C extended beyond this profile, suggesting a change to the native protein state. The molecular radius calculated from the excluded electrolyte volume of flagellin through nanopore-based ΔG characteristics for each Tdepol of ∼65 °C, ∼70 °C, ∼75 °C, and ∼80 °C yielded ∼4.2 ± 0.2 nm, ∼4.3 ± 0.3 nm, ∼4.1 ± 0.2 nm, and ∼4.7 ± 0.5 nm, respectively. This, along with ΔG (plateaued values) and translocation time profiles, points to the possibility of flagellin misfolding at ∼80 °C.
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Affiliation(s)
- Y M Nuwan D Y Bandara
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Jiannan Tang
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Jugal Saharia
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Louis William Rogowski
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Chi Won Ahn
- Nano-Materials Laboratory , National NanoFab Center , Daejeon 34141 , Republic of Korea
| | - Min Jun Kim
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
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Morshed A, Dutta P, Kim MJ. Electrophoretic transport and dynamic deformation of bio-vesicles. Electrophoresis 2019; 40:2584-2591. [PMID: 30993726 PMCID: PMC6718350 DOI: 10.1002/elps.201900025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 03/21/2019] [Accepted: 04/01/2019] [Indexed: 11/06/2022]
Abstract
Study of the deformation dynamics of cells and other sub-micron vesicles, such as virus and neurotransmitter vesicles are necessary to understand their functional properties. This mechanical characterization can be done by submerging the vesicle in a fluid medium and deforming it with a controlled electric field, which is known as electrodeformation. Electrodeformation of biological and artificial lipid vesicles is directly influenced by the vesicle and surrounding media properties and geometric factors. The problem is compounded when the vesicle is naturally charged, which creates electrophoretic forcing on the vesicle membrane. We studied the electrodeformation and transport of charged vesicles immersed in a fluid media under the influence of a DC electric field. The electric field and fluid-solid interactions are modeled using a hybrid immersed interface-immersed boundary technique. Model results are verified with experimental observations for electric field driven translocation of a virus through a nanopore sensor. Our modeling results show interesting changes in deformation behavior with changing electrical properties of the vesicle and the surrounding media. Vesicle movement due to electrophoresis can also be characterized by the change in local conductivity, which can serve as a potential sensing mechanism for electrodeformation experiments in solid-state nanopore setups.
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Affiliation(s)
- Adnan Morshed
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
| | - Prashanta Dutta
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164
| | - Min Jun Kim
- Department of Mechanical Engineering, Southern Methodist University, Dallas, TX, 75275
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Saharia J, Bandara YMNDY, Goyal G, Lee JS, Karawdeniya BI, Kim MJ. Molecular-Level Profiling of Human Serum Transferrin Protein through Assessment of Nanopore-Based Electrical and Chemical Responsiveness. ACS NANO 2019; 13:4246-4254. [PMID: 30844233 DOI: 10.1021/acsnano.8b09293] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this study, we investigated the voltage and pH responsiveness of human serum transferrin (hSTf) protein using silicon nitride (Si xN y) nanopores. The Fe(III)-rich holo form of hSTf was dominant when pH > pI, while the Fe(III)-free apo form was dominant when pH < pI. The translocations of hSTf were purely in an electrophoretic sense, thus depended on its pI and the solution pH. With increasing voltage, voltage driven protein unfolding became prominent which was indicated by the trends associated with change in conductance, due to hSTf translocation, and in the excluded electrolyte volume. Additionally, analysis of the translocation events of the pure apo form of hSTf showed a clear difference in the event population compared to that of the holo form. The results obtained demonstrate the successful application of nanopore devices to distinguish between the holo and apo forms of hSTf in a mixture and to analyze its folding and unfolding phenomenon over a range of pH and applied voltages.
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Affiliation(s)
- Jugal Saharia
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Y M Nuwan D Y Bandara
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | - Gaurav Goyal
- Department of Biological Engineering , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden
| | - Jung Soo Lee
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
| | | | - Min Jun Kim
- Department of Mechanical Engineering , Southern Methodist University , Dallas , Texas 75275 , United States
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Arima A, Harlisa IH, Yoshida T, Tsutsui M, Tanaka M, Yokota K, Tonomura W, Yasuda J, Taniguchi M, Washio T, Okochi M, Kawai T. Identifying Single Viruses Using Biorecognition Solid-State Nanopores. J Am Chem Soc 2018; 140:16834-16841. [DOI: 10.1021/jacs.8b10854] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akihide Arima
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Ilva Hanun Harlisa
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takeshi Yoshida
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Makusu Tsutsui
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Masayoshi Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Kazumichi Yokota
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Wataru Tonomura
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Jiro Yasuda
- Department of Emerging Infectious Disease, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki 852-8523, Japan
| | - Masateru Taniguchi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Takashi Washio
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Mina Okochi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Tomoji Kawai
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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