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Gu H, Chen Y, Lüders A, Bertrand T, Hanedan E, Nielaba P, Bechinger C, Nelson BJ. Scalable high-throughput microfluidic separation of magnetic microparticles. DEVICE 2024; 2:100403. [PMID: 39081390 PMCID: PMC11285115 DOI: 10.1016/j.device.2024.100403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 01/05/2024] [Accepted: 05/01/2024] [Indexed: 08/02/2024]
Abstract
Surface-engineered magnetic microparticles are used in chemical and biomedical engineering due to their ease of synthesis, high surface-to-volume ratio, selective binding, and magnetic separation. To separate them from fluid suspensions, existing methods rely on the magnetic force introduced by the local magnetic field gradient. However, this strategy has poor scalability because the magnetic field gradient decreases rapidly as one moves away from the magnets. Here, we present a scalable high-throughput magnetic separation strategy using a rotating permanent magnet and two-dimensional arrays of micromagnets. Under a dynamic magnetic field, nickel micromagnets allow the surrounding magnetic microparticles to self-assemble into large clusters and effectively propel themselves through the flow. The collective speed of the microparticle swarm reaches about two orders of magnitude higher than the gradient-based separation method over a wide range of operating frequencies and distances from a rotating magnet.
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Affiliation(s)
- Hongri Gu
- Department of Physics, University of Konstanz, Konstanz 78464, Germany
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland
| | - Yonglin Chen
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland
| | - Anton Lüders
- Department of Physics, University of Konstanz, Konstanz 78464, Germany
| | - Thibaud Bertrand
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland
| | - Emre Hanedan
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland
| | - Peter Nielaba
- Department of Physics, University of Konstanz, Konstanz 78464, Germany
| | - Clemens Bechinger
- Department of Physics, University of Konstanz, Konstanz 78464, Germany
| | - Bradley J. Nelson
- Institute of Robotics and Intelligent Systems, ETH Zurich, Zurich CH-8092, Switzerland
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2
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Bracamonte AG. Current Advances in Nanotechnology for the Next Generation of Sequencing (NGS). BIOSENSORS 2023; 13:260. [PMID: 36832027 PMCID: PMC9954403 DOI: 10.3390/bios13020260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 02/03/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
This communication aims at discussing strategies based on developments from nanotechnology focused on the next generation of sequencing (NGS). In this regard, it should be noted that even in the advanced current situation of many techniques and methods accompanied with developments of technology, there are still existing challenges and needs focused on real samples and low concentrations of genomic materials. The approaches discussed/described adopt spectroscopical techniques and new optical setups. PCR bases are introduced to understand the role of non-covalent interactions by discussing about Nobel prizes related to genomic material detection. The review also discusses colorimetric methods, polymeric transducers, fluorescence detection methods, enhanced plasmonic techniques such as metal-enhanced fluorescence (MEF), semiconductors, and developments in metamaterials. In addition, nano-optics, challenges linked to signal transductions, and how the limitations reported in each technique could be overcome are considered in real samples. Accordingly, this study shows developments where optical active nanoplatforms generate signal detection and transduction with enhanced performances and, in many cases, enhanced signaling from single double-stranded deoxyribonucleic acid (DNA) interactions. Future perspectives on miniaturized instrumentation, chips, and devices aimed at detecting genomic material are analyzed. However, the main concept in this report derives from gained insights into nanochemistry and nano-optics. Such concepts could be incorporated into other higher-sized substrates and experimental and optical setups.
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Affiliation(s)
- Angel Guillermo Bracamonte
- Instituto de Investigaciones en Físicoquímica de Córdoba (INFIQC), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, 5000 Córdoba, Argentina; or
- Departement de Chimie et Centre d’Optique, Photonique et Laser (COPL), Université Laval, Québec, QC G1V 0A6, Canada
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3
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Gomez Palacios LR, Bracamonte AG. Development of nano- and microdevices for the next generation of biotechnology, wearables and miniaturized instrumentation. RSC Adv 2022; 12:12806-12822. [PMID: 35496334 PMCID: PMC9047444 DOI: 10.1039/d2ra02008d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 04/15/2022] [Indexed: 12/27/2022] Open
Abstract
This is a short communication based on recent high-impact publications related to how various chemical materials and substrate modifications could be tuned for nano- and microdevices, where their application for high point-of-care bioanalysis and further applications in life science is discussed. Hence, they have allowed different high-impact research topics in a variety of fields, from the control of nanoscale to functional microarchitectures embedded in various support materials to obtain a device for a given application or use. Thus, their incorporation in standard instrumentation is shown, as well as in new optical setups to record different classical and non-classical light, signaling, and energy modes at a variety of wavelengths and energy levels. Moreover, the development of miniaturized instrumentation was also contemplated. In order to develop these different levels of technology, the chemistry, physics and engineering of materials were discussed. In this manner, a number of subjects that allowed the design and manufacture of devices could be found. The following could be mentioned by way of example: (i) nanophotonics; (ii) design, synthesis and tuning of advanced nanomaterials; (iii) classical and non-classical light generation within the near field; (iv) microfluidics and nanofluidics; (v) signal waveguiding; (vi) quantum-, nano- and microcircuits; (vii) materials for nano- and microplatforms, and support substrates and their respective modifications for targeted functionalities. Moreover, nano-optics in in-flow devices and chips for biosensing were discussed, and perspectives on biosensing and single molecule detection (SMD) applications. In this perspective, new insights about precision nanomedicine based on genomics and drug delivery systems were obtained, incorporating new advanced diagnosis methods based on lab-on-particles, labs-on-a-chip, gene therapies, implantable devices, portable miniaturized instrumentation, single molecule detection for biophotonics, and neurophotonics. In this manner, this communication intends to highlight recent reports and developments of nano- and microdevices and further approaches towards the incorporation of developments in nanophotonics and biophotonics in the design of new materials based on different strategies and enhanced techniques and methods. Recent proofs of concept are discussed that could allow new substrates for device manufacturing. Thus, physical phenomena and materials chemistry with accurate control within the nanoscale were introduced into the discussion. In this manner, new potential sources of ideas and strategies for the next generation of technology in many research and development fields are showcased. This is a short communication based on recent high-impact publications related to how various chemical materials and substrate modifications could be tuned for nano- and microdevices, where their application for high point-of-care bioanalysis and further applications in life science is discussed.![]()
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Affiliation(s)
- Luna R Gomez Palacios
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC) Ciudad Universitaria 5000 Córdoba Argentina
| | - A Guillermo Bracamonte
- Instituto de Investigaciones en Físico Química de Córdoba (INFIQC), Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba (UNC) Ciudad Universitaria 5000 Córdoba Argentina .,Department of Chemistry, University of Victoria (UVic) Vancouver Island V8W 2Y2 British Columbia (BC) Canada.,Département de chimie and Centre d'optique, photonique et laser (COPL), Université Laval Québec (QC) G1V 0A6 Canada
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Yucel M, Koc A, Ulgenalp A, Akkoc GD, Ceyhan M, Yildiz UH. PCR-Free Methodology for Detection of Single-Nucleotide Polymorphism with a Cationic Polythiophene Reporter. ACS Sens 2021; 6:950-957. [PMID: 33621051 DOI: 10.1021/acssensors.0c02130] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This study presents a nonamplification-based nucleic acid assay for the detection of single-nucleotide polymorphism (SNP) associated with familial Mediterranean fever (FMF) besides polymerase chain reaction (PCR)-based methodologies. The major objective is to show the potential of the proposed assay for rapid screening of FMF in a Mediterranean region of 400 million population. The assay relies on binding difference of specially designed wild and mutant primers to the target genomic DNA, followed by determination of unbound primers by quick titration of a cationic polythiophene reporter. The fluorescent reporter exhibits signal transition from 525 to 580 nm in the presence of unbound primers, and it correlates the binding affinity of label-free primers to the homozygous wild and mutant genomes. As a proof of concept, 26 real samples are studied relying on the ON and OFF fluorescence signals of the cationic polythiophene reporter. The results are analyzed by principal component analysis (PCA), which provides clear separation of healthy and patient individuals. The further analysis by support vector machine (SVM) classification has revealed that our assay converges to 96% overall accuracy. These results support that the PCR-free nucleic acid assay has a significant potential for rapid and cost-effective screening of familial Mediterranean fever.
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Affiliation(s)
- Muge Yucel
- Department of Bioengineering and Biotechnology, Izmir Institute of Technology, Izmir 35430, Turkey
| | - Altug Koc
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir 35330, Turkey
| | - Ayfer Ulgenalp
- Department of Medical Genetics, Faculty of Medicine, Dokuz Eylul University, Izmir 35330, Turkey
| | - Gun Deniz Akkoc
- Department of Chemistry, Izmir Institute of Technology, İzmir 35430, Turkey
| | - Metin Ceyhan
- Department of Basic Oncology, Institute of Oncology, Dokuz Eylul University, Izmir 35330, Turkey
| | - Umit Hakan Yildiz
- Department of Chemistry, Izmir Institute of Technology, İzmir 35430, Turkey
- Department of Photonic Science and Engineering, Izmir Institute of Technology, Izmir 35430, Turkey
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Fu J, Wu L, Qiao Y, Tu J, Lu Z. Microfluidic Systems Applied in Solid-State Nanopore Sensors. MICROMACHINES 2020; 11:mi11030332. [PMID: 32210148 PMCID: PMC7142662 DOI: 10.3390/mi11030332] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 03/08/2020] [Accepted: 03/20/2020] [Indexed: 01/04/2023]
Abstract
Microfluidic system, as a kind of miniature integrated operating platform, has been applied to solid-state nanopore sensors after many years of experimental study. In the process of introducing microfluidic into solid-state nanopore sensors, many novel device structures are designed due to the abundance of analytes and the diversity of detection methods. Here we review the fundamental setup of nanopore-based microfluidic systems and the developments and advancements that have been taking place in the field. The microfluidic systems with a multichannel strategy to elevate the throughput and efficiency of nanopore sensors are then presented. Multifunctional detection represented by optical-electrical detection, which is realized by microfluidic integration, is also described. A high integration microfluidic system with nanopore is further discussed, which shows the prototype of commercialization.
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Affiliation(s)
| | | | | | - Jing Tu
- Correspondence: (J.T.); (Z.L.); Tel.: +86-25-8379-2396 (J.T.); +86-25-8379-3779 (Z.L.)
| | - Zuhong Lu
- Correspondence: (J.T.); (Z.L.); Tel.: +86-25-8379-2396 (J.T.); +86-25-8379-3779 (Z.L.)
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Varongchayakul N, Hersey J, Squires A, Meller A, Grinstaff M. A Solid-State Hard Microfluidic-Nanopore Biosensor with Multilayer Fluidics and On-Chip Bioassay/Purification Chamber. ADVANCED FUNCTIONAL MATERIALS 2018; 28:1804182. [PMID: 31632230 PMCID: PMC6800661 DOI: 10.1002/adfm.201804182] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Indexed: 05/21/2023]
Abstract
Solid-state nanopores are an emerging biosensor for nucleic acid and protein characterization. For use in a clinical setting, solid-state nanopore sensing requires sample preparation and purification, fluid handling, a heating element, electrical noise insulators, and an electrical readout detector, all of which hamper its translation to a point-of-care diagnostic device. A stand-alone microfluidic-based nanopore device is described that combines a bioassay reaction/purification chamber with a solid-state nanopore sensor. The microfluidic device is composed of the high-temperature/solvent resistance Zeonex plastic, formed via micro-machining and heat bonding, enabling the use of both a heat regulator and a magnetic controller. Fluid control through the microfluidic channels and chambers is controlled via fluid port selector valves and allows up-to eight different solutions. Electrical noise measurements and DNA translocation experiments demonstrate the integrity of the device, with performance comparable to a conventional stand-alone nanopore setup. However, the microfluidic-nanopore setup is superior in terms of ease of use. To showcase the utility of the device, single molecule detection of a DNA PCR product, after magnetic bead DNA separation, is accomplished on chip.
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Affiliation(s)
- Nitinun Varongchayakul
- Departments of Biomedical Engineering, Chemistry, and Medicine, Boston University, Boston MA, 02215, USA
| | - Joseph Hersey
- Departments of Biomedical Engineering, Chemistry, and Medicine, Boston University, Boston MA, 02215, USA
| | - Allison Squires
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Amit Meller
- Departments of Biomedical Engineering, Chemistry, and Medicine, Boston University, Boston MA, 02215, USA
| | - Mark Grinstaff
- Departments of Biomedical Engineering, Chemistry, and Medicine, Boston University, Boston MA, 02215, USA
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7
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Hosseini A, Philpott DN, Soleymani L. Enrichment of magnetic particles using temperature and magnetic field gradients induced by benchtop fabricated micro-electromagnets. LAB ON A CHIP 2017; 17:4097-4104. [PMID: 29076512 DOI: 10.1039/c7lc00825b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The active transport of analytes inside biosensing systems is important for reducing the response time and enhancing the limit-of-detection of these systems. Due to the ease of functionalization with bio-recognition agents and manipulation with magnetic fields, magnetic particles are widely used for active and directed transport of biological analytes. On-chip active electromagnets are ideally suited for manipulating magnetic particles in an automated and miniaturized fashion inside biosensing systems. Unfortunately, the magnetic force exerted by these devices decays rapidly as we move away from the device edges, and increasing the generated force to the levels necessary for particle manipulation requires a parallel increase in the applied current and the resultant Joule heating. In this paper, we designed a study to understand the combined role of thermal and magnetic forces on the movement of magnetic particles in order to extend the interaction distance of on-chip magnetic devices beyond the device edges. For this purpose, we used a rapid prototyping method to create an active/passive on-chip electromagnet with a micro/nano-structured active layer and a patterned ferromagnetic passive layer. We demonstrated that the measured terminal velocities of particles positioned near the electromagnet edge (∼5.5 μm) closely reflect the values obtained by multi-physics modelling. Interestingly, we observed a two orders of magnitude deviation between the experimental and modelling results for the terminal velocities of particles far from the electromagnet edge (∼55.5 μm). Heat modelling of the system using experimentally-measured thermal gradients indicates that this discrepancy is related to the enhanced fluid movement caused by thermal forces. This study enables the rational design of thermo-magnetic systems for thermally driving and magnetically capturing particles that are positioned at distances tens to hundreds of microns away from the edges of on-chip magnetic devices.
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Affiliation(s)
- A Hosseini
- School of Biomedical Engineering, McMaster University, Hamilton, ON L8S 4L8, Canada.
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8
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Serra M, Ferraro D, Pereiro I, Viovy JL, Descroix S. The power of solid supports in multiphase and droplet-based microfluidics: towards clinical applications. LAB ON A CHIP 2017; 17:3979-3999. [PMID: 28948991 DOI: 10.1039/c7lc00582b] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Multiphase and droplet microfluidic systems are growing in relevance in bioanalytical-related fields, especially due to the increased sensitivity, faster reaction times and lower sample/reagent consumption of many of its derived bioassays. Often applied to homogeneous (liquid/liquid) reactions, innovative strategies for the implementation of heterogeneous (typically solid/liquid) processes have recently been proposed. These involve, for example, the extraction and purification of target analytes from complex matrices or the implementation of multi-step protocols requiring efficient washing steps. To achieve this, solid supports such as functionalized particles (micro or nanometric) presenting different physical properties (e.g. magnetic, optical or others) are used for the binding of specific entities. The manipulation of such supports with different microfluidic principles has both led to the miniaturization of existing biomedical protocols and the development of completely new strategies for diagnostics and research. In this review, multiphase and droplet-based microfluidic systems using solid suspensions are presented and discussed with a particular focus on: i) working principles and technological developments of the manipulation strategies and ii) applications, critically discussing the level of maturity of these systems, which can range from initial proofs of concept to real clinical validations.
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Affiliation(s)
- M Serra
- Laboratoire Physico Chimie Curie, Institut Curie, PSL Research University, CNRS UMR168, Paris, France.
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Hybrid Magnetic-DNA Directed Immobilisation Approach for Efficient Protein Capture and Detection on Microfluidic Platforms. Sci Rep 2017; 7:194. [PMID: 28298637 PMCID: PMC5427967 DOI: 10.1038/s41598-017-00268-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/14/2017] [Indexed: 01/17/2023] Open
Abstract
In this study, a hybrid magnetic-DNA directed immobilisation approach is presented to enhance protein capture and detection on a microfluidic platform. DNA-modified magnetic nanoparticles are added in a solution to capture fluorescently labelled immunocomplexes to be detected optically. A magnetic set-up composed of cubic permanent magnets and a microchannel was designed and implemented based on finite element analysis results to efficiently concentrate the nanoparticles only over a defined area of the microchannel as the sensing zone. This in turn, led to the fluorescence emission localisation and the searching area reduction. Also, compared to processes in which the immunocomplex is formed directly on the surface, the proposed approach provides a lower steric hindrance, higher mass transfer, lower equilibrium time, and more surface concentration of the captured targets leading to a faster and more sensitive detection. As a proof-of-concept, the set-up is capable of detecting prostate-specific membrane antigen with concentrations down to 0.7 nM. Our findings suggest that the approach holds a great promise for applications in clinical assays and disease diagnosis.
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Gabardo CM, Hosseini A, Soleymani L. A New Wrinkle in Biosensors: Wrinkled electrodes could be a breakthrough for lab-on-a-chip devices. IEEE NANOTECHNOLOGY MAGAZINE 2016. [DOI: 10.1109/mnano.2016.2539999] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dasgupta S, Das B, Knapp M, Brand RA, Ehrenberg H, Kruk R, Hahn H. Intercalation-driven reversible control of magnetism in bulk ferromagnets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4639-4644. [PMID: 24591165 DOI: 10.1002/adma.201305932] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2013] [Revised: 01/23/2014] [Indexed: 06/03/2023]
Abstract
An extension in magnetoelectric effects is proposed to include reversible chemistry-controlled magnetization variations. This ion-intercalation-driven magnetic control can be fully reversible and pertinent to bulk material volumes. The concept is demonstrated for ferromagnetic iron oxide where the intercalated lithium ions cause valence change and partial redistribution of Fe(3+) cations yielding a large and fully reversible change in magnetization at room temperature.
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Affiliation(s)
- Subho Dasgupta
- Institute for Nanotechnology, Karlsruhe Institute of Technology (KIT), D-76344, Eggenstein-Leopoldshafen, Germany
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12
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Mathematical modeling of functionalized-microsphere based assays for rapid DNA detection: From sample preparation to results. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2014.03.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Preparation of Fe₃O₄-Embedded Poly(styrene)/Poly(thiophene) Core/Shell Nanoparticles and Their Hydrogel Patterns for Sensor Applications. MATERIALS 2014; 7:195-205. [PMID: 28788450 PMCID: PMC5453122 DOI: 10.3390/ma7010195] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2013] [Revised: 12/26/2013] [Accepted: 12/27/2013] [Indexed: 11/17/2022]
Abstract
This research describes the preparation and sensor applications of multifunctional monodisperse, Fe₃O₄ nanoparticles-embedded poly(styrene)/poly(thiophene) (Fe₃O₄-PSt/PTh), core/shell nanoparticles. Monodisperse Fe₃O₄-PSt/PTh nanoparticles were prepared by free-radical combination (mini-emulsion/emulsion) polymerization for Fe₃O₄-PSt core and oxidative seeded emulsion polymerization for PTh shell in the presence of FeCl₃/H₂O₂ as a redox catalyst, respectively. For applicability of Fe₃O₄-PSt/PTh as sensors, Fe₃O₄-PSt/PTh-immobilized poly(ethylene glycol) (PEG)-based hydrogels were fabricated by photolithography. The hydrogel patterns showed a good sensing performance under different H₂O₂ concentrations. They also showed a quenching sensitivity of 1 µg/mL for the Pd2+ metal ion within 1 min. The hydrogel micropatterns not only provide a fast water uptake property but also suggest the feasibility of both H₂O₂ and Pd2+ detection.
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Choi JY, Kim YT, Seo TS. Polymerase chain reaction-free variable-number tandem repeat typing using gold nanoparticle-DNA monoconjugates. ACS NANO 2013; 7:2627-2633. [PMID: 23402549 DOI: 10.1021/nn400004d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this work, we report a novel polymerase chain reaction (PCR)-free variable-number tandem repeat (VNTR) typing method using a T-shaped gold nanoparticle-DNA monoconjugate, called the "watching-gene assay". The T-shaped DNA probe was synthesized by "click" chemistry and linked with the gold nanoparticle to form the gold nanoparticle-DNA monoconjugate (a VNTR probe). Through a simple annealing and ligation reaction of the VNTR probe on a synthetic DNA template mimicking the human D1S80 VNTR locus, the number of tandem repeat units could be deciphered by counting the self-assembled gold nanoparticles. The number of tandem repeat units could be identified with more than 50% yield if the repeat number was less than four. In the case of the real human genomic DNA, the 18 repeat unit number could be successfully revealed by observing the 18-gold-nanoparticle cluster, which exactly corresponded to the number of tandem repeats of the real sample. Our "watching-gene assay" is rapid, simple, and direct for data interpretation, thereby providing an advanced PCR-free genetic polymorphism analysis platform.
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Affiliation(s)
- Jong Young Choi
- Department of Chemical and Biomolecular Engineering (BK21 Program) and KAIST Institute for the BioCentury, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Korea
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15
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Hosseini SH, Moloudi M. Synthesis, Magnetic, and Microwave Absorption Properties of Multi Core-Shell Structured BaxSr1–xFe12O19/Fe3O4/ Polyacrylic Acid Nanocomposites. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/15533174.2012.749904] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Seyed Hossein Hosseini
- a Department of Chemistry, Faculty of Science , Islamic Azad University , Islamshahr Branch, Tehran , I. R. Iran
| | - Maryam Moloudi
- b Department of Chemistry, Faculty of Technical and Engineering , Islamic Azad University , Saveh Unit, Saveh , I. R. Iran
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16
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He W, Zhang L, Han B, Cheng L, Zhou N, Liu Z, Cheng Z. Retracted article: Hydrophilic hybrid materials with magnetism & NIR fluorescence via surface-initiated RAFT polymerization. J Mater Chem B 2013; 1:3257-3266. [DOI: 10.1039/c3tb20262c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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17
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Kim G, Yoo CE, Kim M, Kang HJ, Park D, Lee M, Huh N. Noble polymeric surface conjugated with zwitterionic moieties and antibodies for the isolation of exosomes from human serum. Bioconjug Chem 2012; 23:2114-20. [PMID: 23025585 DOI: 10.1021/bc300339b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
New zwitterionic polymer-coated immunoaffinity beads were developed to resist nonspecific protein adsorption from undiluted human serum for diagnostic applications of exosomes. A zwitterionic sulfobetaine monomer with an amine functional group was employed for simple surface chemistry and antifouling properties. An exosomal biomarker protein, epithelial cell adhesion molecule (EpCAM), was selected as a target molecule in this work. The beads were coated with polyacrylic acids (PAA) for increasing biorecognition sites, and protein G was then conjugated with carboxylic acid groups on the surfaces for controlling EpCAM antibody orientation. The remaining free carboxylic acid groups were modified with sulfobetaine moieties, and anti-EpCAM antibody was finally introduced. The amount of anti-EpCAM on the beads was increased by 40% when compared with PAA-uncoated beads. The surfaces of the beads exhibited near-net-zero charge, and nonspecific protein adsorption was effectively suppressed by sulfobetaine moieties. EpCAM was captured from undiluted human serum with almost the same degree of efficiency as from PBS buffer solution using the newly developed immunoaffinity beads.
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Affiliation(s)
- Gahee Kim
- Bio Research Center, Samsung Advanced Institute of Technology (SAIT), Mt. 14-1, Nongseo-dong, Yongin-si, 446-712, Gyeonggi-do, South Korea
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18
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Cannon B, Campos AR, Lewitz Z, Willets KA, Russell R. Zeptomole detection of DNA nanoparticles by single-molecule fluorescence with magnetic field-directed localization. Anal Biochem 2012; 431:40-7. [PMID: 22929698 DOI: 10.1016/j.ab.2012.08.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 08/19/2012] [Accepted: 08/20/2012] [Indexed: 01/05/2023]
Abstract
Single-molecule fluorescence methods offer the promise of ultrasensitive detection of biomolecules, but the passive immobilization methods commonly employed require analyte concentrations in the picomolar range. Here, we demonstrate that superparamagnetic Fe(3)O(4) nanoparticles (NPs) can be used with an external magnetic field as a simple strategy to enhance the immobilization efficiency and thereby decrease the detection limit. Inorganic NPs functionalized with streptavidin were bound to biotinylated single-stranded DNA oligonucleotides, which were in turn annealed to complementary oligonucleotides labeled with a Cy3 fluorescent dye. Using an external magnetic field, the superparamagnetic nanoparticles were localized to a specific region within the flow chamber surface. From the single-molecule fluorescence time traces, single-step photobleaching indicated that the surface-immobilized NPs were primarily bound with a single Cy3-labeled oligonucleotide. This strategy gave a concentration detection limit for the Cy3-labeled oligonucleotide of 100aM, 3000-fold lower than that from an analogous strategy with passive immobilization. With a sample volume of 25μl, this method achieved a mole detection limit of approximately 2.5zmol (∼1500 molecules). Together, the results support that idea that single-molecule fluorescence methods could be used for biological applications such as detection and measurements of nucleic acids from biological or clinical samples without polymerase chain reaction amplification.
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Affiliation(s)
- Brian Cannon
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
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Modak N, Pal A, Datta A, Ganguly R. Bioseparation in a Microfluidic Channel Using Magnetic Field Flow Fractionation. ACTA ACUST UNITED AC 2012. [DOI: 10.1260/1759-3093.3.1-2.21] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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20
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Basore JR, Baker LA. Applications of microelectromagnetic traps. Anal Bioanal Chem 2012; 403:2077-88. [DOI: 10.1007/s00216-012-6040-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Revised: 03/30/2012] [Accepted: 04/10/2012] [Indexed: 11/28/2022]
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21
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Sun Z, Tong L, Liu D, Shi J, Yang H. Preparation and properties of multifunctional Fe3O4 @YVO4:Eu3+ or Dy3+ core-shell nanocomposites as drug carriers. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15088c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Masarik M, Gumulec J, Sztalmachova M, Hlavna M, Babula P, Krizkova S, Ryvolova M, Jurajda M, Sochor J, Adam V, Kizek R. Isolation of metallothionein from cells derived from aggressive form of high-grade prostate carcinoma using paramagnetic antibody-modified microbeads off-line coupled with electrochemical and electrophoretic analysis. Electrophoresis 2011; 32:3576-88. [DOI: 10.1002/elps.201100301] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2011] [Revised: 06/30/2011] [Accepted: 07/02/2011] [Indexed: 12/18/2022]
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23
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Kell AJ, Pagé L, Tan S, Charlebois I, Boissinot M, Leclerc M, Simard B. The development of a silica nanoparticle-based label-free DNA biosensor. NANOSCALE 2011; 3:3747-3754. [PMID: 21789325 DOI: 10.1039/c1nr10435g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A silica nanoparticle-based DNA biosensor capable of detecting Bacillus anthracis bacteria through the use of unlabelled ss-oligonucleotides has been developed. The biosensor makes use of the optical changes that accompany a nanoparticle-immobilized cationic conjugated polymer (polythiophene) interacting with single-stranded vs. hybridized oligonucleotides, where a fluorescence signal appears only when hybridized DNA is present (i.e. only when the ss-oligonucleotide interacting with the polymer has hybridized with its complement). In order to enhance the sensitivity of the biosensor, two different nanoparticle architectures were developed and used to elucidate how the presence of neighboring fluorophores on the nanoparticle surface affects Förster-resonant energy transfer (FRET) between the polythiophene/oligonucleotide complex (FRET donor) and the fluorophores (FRET acceptors). We demonstrate that the silica nanoparticle-based FRET platform lowers the limit of detection at least 10-fold in comparison to the polythiophene itself, and allows the detection of ∼2 × 10(-12) moles of ss-oligonucleotide in a 100 μL sample with a standard fluorimeter (i.e. has a limit of detection of ∼2 nM ssDNA). Such nanoparticle-based biosensor platforms are beneficial because of the robustness and stability inherent to their covalent assembly and they provide a valuable new tool that may allow for the sensitive, label-free detection (the target DNA that produces the fluorescence signal is unlabelled) without the use of polymerase chain reaction.
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Affiliation(s)
- Arnold J Kell
- Steacie Institute for Molecular Sciences, National Research Council, 100 Sussex Drive, Ottawa, Ontario, Canada K1A 0R6.
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24
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Liu P, Hun X, Qing H. Dendrimer-based biosensor for chemiluminescent detection of DNA hybridization. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0637-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Brouard D, Viger ML, Bracamonte AG, Boudreau D. Label-free biosensing based on multilayer fluorescent nanocomposites and a cationic polymeric transducer. ACS NANO 2011; 5:1888-96. [PMID: 21344882 DOI: 10.1021/nn102776m] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
This study describes the preparation and characterization of a DNA sensing architecture combining the molecular recognition capabilities of a cationic conjugated polymer transducer with highly fluorescent core-shell nanoparticles (NPs). The very structure of the probe-labeled NPs and the polymer-induced formation of NP aggregates maximize the proximity between the polymer donor and acceptor NPs that is required for optimal resonant energy transfer. Each hybridization event is signaled by a potentially large number of excited reporters following the efficient plasmon-enhanced energy transfer between target-activated polymer transducer and fluorophores located in the self-assembled core-shell aggregates, resulting in direct molecular detection of target nucleic acids at femtomolar concentrations.
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Affiliation(s)
- Danny Brouard
- Département de chimie and Centre d'optique, photonique et laser (COPL), Université Laval, Québec (QC), Canada G1V 0A6
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Beveridge JS, Stephens JR, Williams ME. The use of magnetic nanoparticles in analytical chemistry. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2011; 4:251-73. [PMID: 21417723 DOI: 10.1146/annurev-anchem-061010-114041] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Magnetic nanoparticles uniquely combine superparamagnetic behavior with dimensions that are smaller than or the same size as molecular analytes. The integration of magnetic nanoparticles with analytical methods has opened new avenues for sensing, purification, and quantitative analysis. Applied magnetic fields can be used to control the motion and properties of magnetic nanoparticles; in analytical chemistry, use of magnetic fields provides methods for manipulating and analyzing species at the molecular level. In this review, we describe applications of magnetic nanoparticles to analyte handling, chemical sensors, and imaging techniques.
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Affiliation(s)
- Jacob S Beveridge
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16803, USA.
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Ranasinghe RT, Brown T. Ultrasensitive fluorescence-based methods for nucleic acid detection: towards amplification-free genetic analysis. Chem Commun (Camb) 2011; 47:3717-35. [DOI: 10.1039/c0cc04215c] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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28
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Jaganathan H, Wang P, Klein J, Lossie AC, Ivanisevic A. Detecting DNA methylation through changes in transverse proton relaxation. Analyst 2011; 136:2441-5. [DOI: 10.1039/c1an15146k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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29
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Beveridge JS, Stephens JR, Williams ME. Differential magnetic catch and release: experimental parameters for controlled separation of magnetic nanoparticles. Analyst 2011; 136:2564-71. [DOI: 10.1039/c1an15168a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Mistlberger G, Klimant I. Luminescent magnetic particles: structures, syntheses, multimodal imaging, and analytical applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s12566-010-0017-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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31
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Gu L, Park JH, Duong KH, Ruoslahti E, Sailor MJ. Magnetic luminescent porous silicon microparticles for localized delivery of molecular drug payloads. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2546-52. [PMID: 20814923 PMCID: PMC3033739 DOI: 10.1002/smll.201000841] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Magnetic manipulation, fluorescent tracking, and localized delivery of a drug payload to cancer cells in vitro is demonstrated, using nanostructured porous silicon microparticles as a carrier. The multifunctional microparticles are prepared by electrochemical porosification of a silicon wafer in a hydrofluoric acid-containing electrolyte, followed by removal and fracture of the porous layer into particles using ultrasound. The intrinsically luminescent particles are loaded with superparamagnetic iron oxide nanoparticles and the anti-cancer drug doxorubicin. The drug-containing particles are delivered to human cervical cancer (HeLa) cells in vitro, under the guidance of a magnetic field. The high concentration of particles in the proximity of the magnetic field results in a high concentration of drug being released in that region of the Petri dish, and localized cell death is confirmed by cellular viability assay (Calcein AM).
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Affiliation(s)
- Luo Gu
- Department of Chemistry and Biochemistry, Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093, USA
| | - Ji-Ho Park
- Department of Chemistry and Biochemistry, Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093, USA
| | - Kim H. Duong
- Department of Chemistry and Biochemistry, Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093, USA
| | - Erkki Ruoslahti
- Burnham Institute for Medical Research at UCSB, University of California, Santa Barbara, 1105 Life Sciences Technology Bldg. Santa Barbara, CA 93106, USA
| | - Michael J. Sailor
- Department of Chemistry and Biochemistry, Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman, La Jolla, CA 92093, USA
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32
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Magnetic solids in analytical chemistry: A review. Anal Chim Acta 2010; 674:157-65. [DOI: 10.1016/j.aca.2010.06.043] [Citation(s) in RCA: 346] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Revised: 06/24/2010] [Accepted: 06/25/2010] [Indexed: 12/21/2022]
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33
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Basore JR, Lavrik NV, Baker LA. Single-pore membranes gated by microelectromagnetic traps. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:2759-2763. [PMID: 20408136 DOI: 10.1002/adma.201000566] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Joseph R Basore
- Department of Chemistry, Indiana University, Bloomington, IN 47405, USA
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34
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Ganguly R, Puri IK. Microfluidic transport in magnetic MEMS and bioMEMS. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2010; 2:382-99. [DOI: 10.1002/wnan.92] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Fan A, Cai S, Cao Z, Lau C, Lu J. Hydroxylamine-amplified gold nanoparticles for the homogeneous detection of sequence-specific DNA. Analyst 2010; 135:1400-5. [PMID: 20407685 DOI: 10.1039/c0an00007h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the development of a simple, sensitive, inexpensive, and homogeneous detection method for the analysis of DNA hybridization based on the optical properties of hydroxylamine-amplified gold nanoparticles (Au NPs) in solution phase. The assay relies on a sandwich-type DNA hybridization in which DNA targets are first hybridized with capture DNA probes immobilized on the surface of magnetic beads and then sandwiched with Au NPs modified with biotinylated reporter DNA. Au NPs, after being anchored on the magnetic beads, are then dispersed in solution by the dehybridization and enlarged by using a mixture of HAuCl(4) and NH(2)OH. The Au NP growth signal which is used for the quantitative analysis of sequence-specific DNA can be easily monitored by the naked eye directly or an UV-vis spectrophotometer. Surface plasmonic signature of the enlarged Au NPs and the kinetics of the Au NP growth in the homogenous phase containing of HAuCl(4) and NH(2)OH have also been studied. As a result, such a homogeneous assay allows the detection of 30-base DNA targets down to the 100 amol level, which offers great promise for facilitating sensitive detection of other biorecognition events.
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Affiliation(s)
- Aiping Fan
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai, China
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36
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Gijs MAM, Lacharme F, Lehmann U. Microfluidic applications of magnetic particles for biological analysis and catalysis. Chem Rev 2010; 110:1518-63. [PMID: 19961177 DOI: 10.1021/cr9001929] [Citation(s) in RCA: 372] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Martin A M Gijs
- Laboratory of Microsystems, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne EPFL, Switzerland.
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37
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Cai S, Xin L, Lau C, Lu J. Highly sensitive non-stripping gold nanoparticles-based chemiluminescent detection of DNA hybridization coupled to magnetic beads. Analyst 2010; 135:615-20. [DOI: 10.1039/b927359j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Xin L, Cao Z, Lau C, Kai M, Lu J. G-rich sequence-functionalized polystyrene microsphere-based instantaneous derivatization for the chemiluminescent amplified detection of DNA. LUMINESCENCE 2009; 25:336-42. [DOI: 10.1002/bio.1159] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Electrochemical detection of DNA hybridization based on bio-bar code method. Biosens Bioelectron 2009; 24:3140-3. [DOI: 10.1016/j.bios.2009.03.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2008] [Revised: 02/21/2009] [Accepted: 03/11/2009] [Indexed: 01/30/2023]
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40
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Hu K, Liu P, Ye S, Zhang S. Ultrasensitive electrochemical detection of DNA based on PbS nanoparticle tags and nanoporous gold electrode. Biosens Bioelectron 2009; 24:3113-9. [PMID: 19419853 DOI: 10.1016/j.bios.2009.04.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2009] [Revised: 03/09/2009] [Accepted: 04/02/2009] [Indexed: 11/30/2022]
Abstract
An electrochemical stripping assay for ultrasensitive detection of target DNA was reported in this work. The protocol involved nanoporous gold (NPG) electrode modified with single-stranded DNA (ssDNA) and Au nanoparticles (Au-NPs) co-loaded with two kinds of ssDNA, one was reporter DNA which was complementary to the target DNA, the other modified with PbS nanoparticles (PbS-NPs) was signal DNA which was non-complemented, reducing the cross-reaction between the targets and reporter DNA on the same Au-NP. The amount of target DNA was determined by indirect determination of the amount of lead ions through differential pulse anodic stripping voltammetry (DPASV). This protocol could detect target DNA of as low as femtomolar and exhibited excellent selectivity against one-base mismatched DNA and non-complementary DNA. Under the optimum conditions, the anodic stripping peak current of lead demonstrated a good linear relationship with the target DNA concentration in the range of 9.0x10(-16) to 7.0x10(-14) M. A detection limit of 2.6x10(-16) M of target DNA was achieved.
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Affiliation(s)
- Kongcheng Hu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China
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41
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Magnetically assisted fluorescence ratiometric assays for adenosine deaminase using water-soluble conjugated polymers. Sci Bull (Beijing) 2009. [DOI: 10.1007/s11434-009-0195-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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42
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DNA-based amplified electrical bio-barcode assay for one-pot detection of two target DNAs. Biosens Bioelectron 2009; 24:2730-4. [DOI: 10.1016/j.bios.2008.12.032] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2008] [Revised: 12/07/2008] [Accepted: 12/22/2008] [Indexed: 11/21/2022]
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43
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Nagao D, Yokoyama M, Yamauchi N, Matsumoto H, Kobayashi Y, Konno M. Synthesis of highly monodisperse particles composed of a magnetic core and fluorescent shell. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:9804-8. [PMID: 18652421 DOI: 10.1021/la801364w] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Highly monodisperse particles composed of a magnetic silica core and fluorescent polymer shell were synthesized with a combined technique of heterocoagulation and soap-free emulsion polymerization. Prior to heterocoagulation, monodisperse, submicrometer-sized silica particles were prepared with the Stober method, and magnetic nanoparticles were prepared with a modified Massart method in which a cationic silane coupling agent of N-trimethoxysilylpropyl- N, N, N-trimethylammonium chloride was added just after coprecipitation of Fe (2+) and Fe (3+). The silica particles with negative surface potential were heterocoagulated with the magnetic nanoparticles with positive surface potential. The magnetic silica particles obtained with the heterocoagulation were treated with sodium silicate to modify their surfaces with silica. In the formation of a fluorescent polymer shell onto the silica-coated magnetic silica cores, an amphoteric initiator of 2,2'-azobis[ N-(2-carboxyethyl)-2-2-methylpropionamidine] (VA-057) was used to control the colloidal stability of the magnetic cores during the polymer coating. The polymerization of St in the presence of a hydrophobic fluorophore of pyrene could coat the cores with fluorescent polymer shells, resulting in monodisperse particles with a magnetic silica core and fluorescent polymer shell. Measurements of zeta potential for the composite particles in different pH values indicated that the composite particles had an amphoteric property originating from VA-057 initiator.
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Affiliation(s)
- Daisuke Nagao
- Department of Chemical Engineering, Graduate School of Engineering, Tohoku University, 6-6-07, Aoba, Aramaki-aza, Aoba-ku, Sendai 980-8579, Japan
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44
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Zhu D, Tang Y, Xing D, Chen WR. PCR-free quantitative detection of genetically modified organism from raw materials. An electrochemiluminescence-based bio bar code method. Anal Chem 2008; 80:3566-71. [PMID: 18386909 PMCID: PMC5978678 DOI: 10.1021/ac0713306] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A bio bar code assay based on oligonucleotide-modified gold nanoparticles (Au-NPs) provides a PCR-free method for quantitative detection of nucleic acid targets. However, the current bio bar code assay requires lengthy experimental procedures including the preparation and release of bar code DNA probes from the target-nanoparticle complex and immobilization and hybridization of the probes for quantification. Herein, we report a novel PCR-free electrochemiluminescence (ECL)-based bio bar code assay for the quantitative detection of genetically modified organism (GMO) from raw materials. It consists of tris-(2,2'-bipyridyl) ruthenium (TBR)-labeled bar code DNA, nucleic acid hybridization using Au-NPs and biotin-labeled probes, and selective capture of the hybridization complex by streptavidin-coated paramagnetic beads. The detection of target DNA is realized by direct measurement of ECL emission of TBR. It can quantitatively detect target nucleic acids with high speed and sensitivity. This method can be used to quantitatively detect GMO fragments from real GMO products.
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Affiliation(s)
- Debin Zhu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China
| | - Yabing Tang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China
| | - Da Xing
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China
| | - Wei R. Chen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, China
- Department of Engineering and Physics, College of Mathematics and Science, University of Central Oklahoma, Edmond, Oklahoma 73034, USA
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45
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Nagao D, Yokoyama M, Saeki S, Kobayashi Y, Konno M. Preparation of composite particles with magnetic silica core and fluorescent polymer shell. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1855-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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46
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Corr SA, Rakovich YP, Gun’ko YK. Multifunctional Magnetic-fluorescent Nanocomposites for Biomedical Applications. NANOSCALE RESEARCH LETTERS 2008. [PMCID: PMC3244791 DOI: 10.1007/s11671-008-9122-8] [Citation(s) in RCA: 243] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Nanotechnology is a fast-growing area, involving the fabrication and use of nano-sized materials and devices. Various nanocomposite materials play a number of important roles in modern science and technology. Magnetic and fluorescent inorganic nanoparticles are of particular importance due to their broad range of potential applications. It is expected that the combination of magnetic and fluorescent properties in one nanocomposite would enable the engineering of unique multifunctional nanoscale devices, which could be manipulated using external magnetic fields. The aim of this review is to present an overview of bimodal “two-in-one” magnetic-fluorescent nanocomposite materials which combine both magnetic and fluorescent properties in one entity, in particular those with potential applications in biotechnology and nanomedicine. There is a great necessity for the development of these multifunctional nanocomposites, but there are some difficulties and challenges to overcome in their fabrication such as quenching of the fluorescent entity by the magnetic core. Fluorescent-magnetic nanocomposites include a variety of materials including silica-based, dye-functionalised magnetic nanoparticles and quantum dots-magnetic nanoparticle composites. The classification and main synthesis strategies, along with approaches for the fabrication of fluorescent-magnetic nanocomposites, are considered. The current and potential biomedical uses, including biological imaging, cell tracking, magnetic bioseparation, nanomedicine and bio- and chemo-sensoring, of magnetic-fluorescent nanocomposites are also discussed.
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Affiliation(s)
- Serena A Corr
- The School of Chemistry, Trinity College, University of Dublin, Dublin, Ireland
| | - Yury P Rakovich
- The School of Physics, Trinity College, University of Dublin, Dublin, Ireland
| | - Yurii K Gun’ko
- The School of Chemistry, Trinity College, University of Dublin, Dublin, Ireland
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47
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Miao J, Cao Z, Zhou Y, Lau C, Lu J. Instantaneous Derivatization Technology for Simultaneous and Homogeneous Determination of Multiple DNA Targets. Anal Chem 2008; 80:1606-13. [DOI: 10.1021/ac7022553] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Juru Miao
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
| | - Zhijuan Cao
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
| | - Yang Zhou
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
| | - Choiwan Lau
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
| | - Jianzhong Lu
- School of Pharmacy, Fudan University, 138 Yixueyuan Road, Shanghai 200032, China
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48
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Ho HA, Najari A, Leclerc M. Optical detection of DNA and proteins with cationic polythiophenes. Acc Chem Res 2008; 41:168-78. [PMID: 18198841 DOI: 10.1021/ar700115t] [Citation(s) in RCA: 388] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In recent years, intense research has been carried out worldwide with the goal of developing simple, sensitive, and specific detection tools for biomedical applications. Along these lines, we reported in 2002 on cationic polythiophene derivatives able to provide ultrasensitive detection levels and the capability to distinguish perfect matches from oligonucleotides having as little as a single base mismatch. It was shown that the intrinsic fluorescence of the random-coil polymers quenches as a result of the planar, highly conjugated conformation adopted by the polymers when complexed with a single-strand DNA (ssDNA) capture probe but increases again after hybridization with the perfectly matched complementary strand. This change in fluorescence intensity is mainly due to a modification in the delocalization of pi electrons along the carbon chain backbone that occurs when switching between the two conformations. Thus, by monitoring, via the change in fluorescence intensity, the hybridization of the complementary ssDNA target with the "duplex", one could detect as little as 220 complementary target molecules in a 150 microL sample volume (0.36 zmol) in less than 1 hour. Building on this initial concept, we then reported that tagging the DNA probe with a suitable fluorophore dramatically increases the detection sensitivity. This novel molecular system involves the self-assembly of aggregates of duplexes in solution, prior to the introduction of the target, which allows a highly efficient resonance energy transfer (RET) between a "donor" (being the complex formed of the DNA double helix and the polymer chain wrapped around it) and a large number of neighboring "acceptors" (the fluorophores attached to the DNA probes). The massive intrinsic signal amplification (fluorescence chain reaction or FCR) provided by this novel integrated molecular system allows the specific detection of as little as five dsDNA copies in a 3 mL sample volume in only 5 minutes, without the need for prior amplification of the target. Clearly, direct and reliable detection of DNA hybridization without prior PCR amplification or chemical tagging of the genetic target is now possible with this methodology. We have also shown that proteins can be detected following a similar strategy. Impressive results have also been reported by direct and specific staining of targeted proteins. All these features have recently allowed the development of responsive polymeric supports for the detection of DNA and proteins. All these assays that do not require any chemical manipulation of the biological targets or sophisticated experimental procedures should soon lead to major advances in genomics and proteomics.
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Affiliation(s)
- Hoang-A. Ho
- Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec G1K 7P4, Canada
| | - Ahmed Najari
- Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec G1K 7P4, Canada
| | - Mario Leclerc
- Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec G1K 7P4, Canada
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Li H, Lau C, Lu J. Carrier-resolved technology for homogeneous and multiplexed DNA assays in a ‘one-pot reaction’. Analyst 2008; 133:1229-36. [DOI: 10.1039/b804096f] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Quinn EJ, Hernandez-Santana A, Hutson DM, Pegrum CM, Graham D, Smith WE. A SERRS-active bead/microelectromagnet system for small-scale sensitive molecular identification and quantitation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2007; 3:1394-7. [PMID: 17492746 DOI: 10.1002/smll.200700022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Affiliation(s)
- Edward J Quinn
- Centre for Molecular Nanometrology, WestCHEM, Department of Pure & Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, UK
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