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Piao J, Liu L, Cai L, Ri HC, Jin X, Sun H, Piao X, Shang HB, Jin X, Pu Q, Cai Y, Yao Z, Nardiello D, Quinto M, Li D. High-Resolution Micro-object Separation by Rotating Magnetic Chromatography. Anal Chem 2022; 94:11500-11507. [PMID: 35943850 DOI: 10.1021/acs.analchem.2c01385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The development of new technologies for the separation, selection, and isolation of microparticles such as rare target cells, circulating tumor cells, cancer stem cells, and immune cells has become increasingly important in the last few years. Microparticle separation technologies are usually applied to the analysis of disease-associated cells, but these procedures often face a cell separation problem that is often insufficient for single specific cell analyses. To overcome these limitations, a highly accurate size-based microparticle separation technique, herein called "rotating magnetic chromatography", is proposed in this work. Magnetic nanoparticles, placed in a microfluidic separation channel, are forced to move in well-defined trajectories by an external magnetic field, colliding with microparticles that are in this way separated on the basis of their dimensions with high accuracy and reproducibility. The method was optimized by using fluorescein isothiocyanate-modified polystyrene particles (chosen as a reference standard) and then applied to the analysis of cancer cells like Hep-3B and SK-Hep-1, allowing their fast and high-resolution chromatographic separation as a function of their dimensions. Due to its unmatched sub-micrometer cell separation capabilities, RMC can be considered a break-through technique that can unlock new perspectives in different scientific fields, that is, in medical oncology.
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Affiliation(s)
- Jishou Piao
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Lu Liu
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Long Cai
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Hyok Chol Ri
- College of Pharmacy, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Xiangzi Jin
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Huaze Sun
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Xiangfan Piao
- Engineering College Department of Electronics, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Hai-Bo Shang
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Xuejun Jin
- College of Pharmacy, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
| | - Qiaosheng Pu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Yong Cai
- College of Life Science, Jilin University, Changchun City, Jilin province 130012, China
| | - Zhongping Yao
- State Key Laboratory of Chirosciences, Food Safety and Technology Research Centre and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR 999077, China
| | - Donatella Nardiello
- DAFNE─Department of Agriculture, Food, Natural resources and Engineering, University of Foggia, Via Napoli 25, I-71122 Foggia, Italy
| | - Maurizio Quinto
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China.,DAFNE─Department of Agriculture, Food, Natural resources and Engineering, University of Foggia, Via Napoli 25, I-71122 Foggia, Italy
| | - Donghao Li
- Department of Chemistry, Yanbian University, Park Road 977, Yanji City, Jilin Province 133002, China
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2
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Chong WH, Leong SS, Lim J. Design and operation of magnetophoretic systems at microscale: Device and particle approaches. Electrophoresis 2021; 42:2303-2328. [PMID: 34213767 DOI: 10.1002/elps.202100081] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/13/2021] [Accepted: 06/24/2021] [Indexed: 12/11/2022]
Abstract
Combining both device and particle designs are the essential concepts to be considered in magnetophoretic system development. Researcher efforts are often dedicated to only one of these design aspects and neglecting the interplay between them. Herein, to bring out importance of the idea of integration between device and particle, we reviewed the working principle of magnetophoretic system (includes both device and particle design concepts). Since, the magnetophoretic force is influenced by both field gradient and magnetization volume, hence, accurate prediction of the magnetophoretic force is relying on the availability of information on both parameters. In device design, we focus on the different strategies used to create localized high-field gradient. For particle design, we emphasize on the scaling between hydrodynamic size and magnetization volume. Moreover, we also briefly discussed the importance of magnetoshape anisotropy related to particle design aspect of magnetophoretic systems. Next, we illustrated the need for integration between device and particle design using microscale applications of magnetophoretic systems, include magnetic tweezers and microfluidic systems, as our working example. On the basis of our discussion, we highlighted several promising examples of microscale magnetophoretic systems which greatly utilized the interplay between device and particle design. Further, we concluded the review with several factors that possibly resulted in the lack of research efforts related to device and particle design integration.
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Affiliation(s)
- Wai Hong Chong
- School of Chemical Engineering, Universiti Sains Malaysia, Penang, Malaysia
| | - Sim Siong Leong
- Department of Petrochemical Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Kampar, Perak, Malaysia
| | - JitKang Lim
- School of Chemical Engineering, Universiti Sains Malaysia, Penang, Malaysia.,Department of Physics, Carnegie Mellon University, Pittsburgh, PA, USA
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Abstract
With the rapid development of high technology, chemical science is not as it used to be a century ago. Many chemists acquire and utilize skills that are well beyond the traditional definition of chemistry. The digital age has transformed chemistry laboratories. One aspect of this transformation is the progressing implementation of electronics and computer science in chemistry research. In the past decade, numerous chemistry-oriented studies have benefited from the implementation of electronic modules, including microcontroller boards (MCBs), single-board computers (SBCs), professional grade control and data acquisition systems, as well as field-programmable gate arrays (FPGAs). In particular, MCBs and SBCs provide good value for money. The application areas for electronic modules in chemistry research include construction of simple detection systems based on spectrophotometry and spectrofluorometry principles, customizing laboratory devices for automation of common laboratory practices, control of reaction systems (batch- and flow-based), extraction systems, chromatographic and electrophoretic systems, microfluidic systems (classical and nonclassical), custom-built polymerase chain reaction devices, gas-phase analyte detection systems, chemical robots and drones, construction of FPGA-based imaging systems, and the Internet-of-Chemical-Things. The technology is easy to handle, and many chemists have managed to train themselves in its implementation. The only major obstacle in its implementation is probably one's imagination.
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Affiliation(s)
- Gurpur Rakesh D Prabhu
- Department of Chemistry, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan.,Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Pawel L Urban
- Department of Chemistry, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan.,Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, 101, Section 2, Kuang-Fu Road, Hsinchu, 30013, Taiwan
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Alnaimat F, Karam S, Mathew B, Mathew B. Magnetophoresis and Microfluidics: A Great Union. IEEE NANOTECHNOLOGY MAGAZINE 2020. [DOI: 10.1109/mnano.2020.2966029] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Xue M, Xiang A, Guo Y, Wang L, Wang R, Wang W, Ji G, Lu Z. Dynamic Halbach array magnet integrated microfluidic system for the continuous-flow separation of rare tumor cells. RSC Adv 2019; 9:38496-38504. [PMID: 35540230 PMCID: PMC9075830 DOI: 10.1039/c9ra08285a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/08/2019] [Indexed: 01/18/2023] Open
Abstract
Circulating tumor cells (CTCs), the most representative rare cells in peripheral blood, have received great attention due to their clinical utility in liquid biopsy. The downstream analysis of intact CTCs isolated from peripheral blood provides important clinical information for personalized medicine. However, current CTC isolation and detection methods have been challenged by their extreme rarity and heterogeneity. In this study, we developed a novel microfluidic system with a continuously moving Halbach array magnet (dHAMI microfluidic system) for negative isolation CTCs from whole blood, which aimed to capture non-target white blood cells (WBCs) and elute target CTCs. The dynamic and continuous movement of the Halbach array magnet generated a continuous magnetic force acting on the magnetic bead-labelled WBCs in the continuous-flow fluid to negatively exclude the WBCs from the CTCs. Furthermore, the continuously moving magnetic field effectively eliminated the effect of magnetic bead aggregation on the fluid flow to realize the continuous-flow separation of the CTCs without a sample loading volume limitation. The experimental procedure for CTC negative isolation using the dHAMI microfluidic system could be completed within 40 min. Under the optimized experimental conditions of the dHAMI microfluidic system, including the flow rate and concentration of the immunomagnetic bead, the average CTC capture rate over a range of spiked cell numbers (50–1000 cancer cells per mL) was up to 91.6% at a flow rate of 100 μL min−1. Finally, the CTCs were successfully detected in 10 of 10 (100%) blood samples from patients with cancer. Therefore, the dHAMI microfluidic system could effectively isolate intact and heterogeneous CTCs for downstream cellular and molecular analyses, and this robust microfluidic platform with an excellent magnetic manipulation performance also has great application potential for the separation of other rare cells. We develop a dynamic Halbach array magnet integrated microfluidic system for continuous-flow separation of circulating tumor cells from whole blood.![]()
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Affiliation(s)
- Mei Xue
- Center for Translational Medicine, The First Affiliated Hospital of Xi'an Jiaotong University Xi'an 710061 Shaanxi People's Republic of China
| | - An Xiang
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Yanhai Guo
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Li Wang
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Rou Wang
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Wenwen Wang
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Gang Ji
- Xijing Hospital of Digestive Diseases, Xijing Hospital, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
| | - Zifan Lu
- Department of Biopharmaceutics, School of Pharmacy, Air Force Medical University (The Fourth Military Medical University) Xi'an 710032 Shaanxi People's Republic of China
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Alnaimat F, Dagher S, Mathew B, Hilal‐Alnqbi A, Khashan S. Microfluidics Based Magnetophoresis: A Review. CHEM REC 2018; 18:1596-1612. [DOI: 10.1002/tcr.201800018] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/24/2018] [Indexed: 02/01/2023]
Affiliation(s)
- Fadi Alnaimat
- Mechanical Engineering DepartmentCollege of EngineeringUAE University Al Ain Abu Dhabi UAE
| | - Sawsan Dagher
- Mechanical Engineering DepartmentCollege of EngineeringUAE University Al Ain Abu Dhabi UAE
| | - Bobby Mathew
- Mechanical Engineering DepartmentCollege of EngineeringUAE University Al Ain Abu Dhabi UAE
| | - Ali Hilal‐Alnqbi
- Mechanical Engineering DepartmentCollege of EngineeringUAE University Al Ain Abu Dhabi UAE
- Abu Dhabi Polytechnic Abu Dhabi UAE
| | - Saud Khashan
- Mechanical Engineering DepartmentJordan University of Science and Technology Irbid Jordan
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Munaz A, Shiddiky MJA, Nguyen NT. Recent advances and current challenges in magnetophoresis based micro magnetofluidics. BIOMICROFLUIDICS 2018; 12:031501. [PMID: 29983837 PMCID: PMC6013300 DOI: 10.1063/1.5035388] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 06/11/2018] [Indexed: 05/12/2023]
Abstract
The combination of magnetism and microscale fluid flow has opened up a new era for handling and manipulation of samples in microfluidics. In particular, magnetophoresis, the migration of particles in a magnetic field, is extremely attractive for microfluidic handling due to its contactless nature, independence of ionic concentration, and lack of induced heating. The present paper focuses on recent advances and current challenges of magnetophoresis and highlights the key parameters affecting the manipulation of particles by magnetophoresis. The magnetic field is discussed according to their relative motion to the sample as stationary and dynamic fields. The migration of particles is categorized as positive and negative magnetophoresis. The applications of magnetophoresis are discussed according to the basic manipulation tasks such as mixing, separation, and trapping of particles or cells. Finally, the paper highlights the limitations of current approaches and provides the future perspective for this research area.
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Affiliation(s)
- Ahmed Munaz
- Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | | | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
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8
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Gencturk E, Mutlu S, Ulgen KO. Advances in microfluidic devices made from thermoplastics used in cell biology and analyses. BIOMICROFLUIDICS 2017; 11:051502. [PMID: 29152025 PMCID: PMC5654984 DOI: 10.1063/1.4998604] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/11/2017] [Indexed: 05/10/2023]
Abstract
Silicon and glass were the main fabrication materials of microfluidic devices, however, plastics are on the rise in the past few years. Thermoplastic materials have recently been used to fabricate microfluidic platforms to perform experiments on cellular studies or environmental monitoring, with low cost disposable devices. This review describes the present state of the development and applications of microfluidic systems used in cell biology and analyses since the year 2000. Cultivation, separation/isolation, detection and analysis, and reaction studies are extensively discussed, considering only microorganisms (bacteria, yeast, fungi, zebra fish, etc.) and mammalian cell related studies in the microfluidic platforms. The advantages/disadvantages, fabrication methods, dimensions, and the purpose of creating the desired system are explained in detail. An important conclusion of this review is that these microfluidic platforms are still open for research and development, and solutions need to be found for each case separately.
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Affiliation(s)
- Elif Gencturk
- Department of Chemical Engineering, Biosystems Engineering Laboratory, Bogazici University, 34342 Istanbul, Turkey
| | - Senol Mutlu
- Department of Electrical and Electronics Engineering, BUMEMS Laboratory, Bogazici University, 34342 Istanbul, Turkey
| | - Kutlu O Ulgen
- Department of Chemical Engineering, Biosystems Engineering Laboratory, Bogazici University, 34342 Istanbul, Turkey
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9
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Sonker M, Yang R, Sahore V, Kumar S, Woolley AT. On-Chip Fluorescent Labeling using Reversed-phase Monoliths and Microchip Electrophoretic Separations of Selected Preterm Birth Biomarkers. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2016; 8:7739-7746. [PMID: 28496521 PMCID: PMC5421993 DOI: 10.1039/c6ay01803c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
On-chip preconcentration, purification, and fluorescent labeling are desirable sample preparation steps to achieve complete automation in integrated microfluidic systems. In this work, we developed electrokinetically operated microfluidic devices for solid-phase extraction and fluorescent labeling of preterm birth (PTB) biomarkers. Reversed-phase monoliths based on different acrylate monomers were photopolymerized in cyclic olefin copolymer microdevices and studied for the selective retention and elution of a fluorescent dye and PTB biomarkers. Octyl methacrylate-based monoliths with desirable retention and elution characteristics were chosen and used for on-chip fluorescent labeling of three PTB biomarkers. Purification of on-chip labeled samples was done by selective elution of unreacted dye prior to sample. Automated and rapid on-chip fluorescent labeling was achieved with similar efficiency to that obtained for samples labeled off chip. Additionally, protocols for microchip electrophoresis of several off-chip-labeled PTB biomarkers were demonstrated in poly(methyl methacrylate) microfluidic devices. This study is an important step toward the development of integrated on-chip labeling and separation microfluidic devices for PTB biomarkers.
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Affiliation(s)
- Mukul Sonker
- Department of Chemistry and Biochemistry, Brigham Young University, Provo 84602, UT, USA
| | - Rui Yang
- Department of Chemistry and Biochemistry, Brigham Young University, Provo 84602, UT, USA
| | - Vishal Sahore
- Department of Chemistry and Biochemistry, Brigham Young University, Provo 84602, UT, USA
| | - Suresh Kumar
- Department of Chemistry and Biochemistry, Brigham Young University, Provo 84602, UT, USA
| | - Adam T Woolley
- Department of Chemistry and Biochemistry, Brigham Young University, Provo 84602, UT, USA
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10
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Affiliation(s)
- Darryl A. Boyd
- Optical Sciences Division; US Naval Research Laboratory; 4555 Overlook Dr., SW Washington DC USA
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11
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Boyd DA. Sulfur and Its Role In Modern Materials Science. Angew Chem Int Ed Engl 2016; 55:15486-15502. [PMID: 27860133 DOI: 10.1002/anie.201604615] [Citation(s) in RCA: 225] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Indexed: 02/03/2023]
Abstract
Although well-known and studied for centuries, sulfur continues to be at the center of an extensive array of scientific research topics. As one of the most abundant elements in the Universe, a major by-product of oil refinery processes, and as a common reaction site within biological systems, research involving sulfur is both broad in scope and incredibly important to our daily lives. Indeed, there has been renewed interest in sulfur-based reactions in just the past ten years. Sulfur research spans the spectrum of topics within the physical sciences including research on improving energy efficiency, environmentally friendly uses for oil refinery waste products, development of polymers with unique optical and mechanical properties, and materials produced for biological applications. This Review focuses on some of the latest exciting ways in which sulfur and sulfur-based reactions are being utilized to produce materials for application in energy, environmental, and other practical areas.
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Affiliation(s)
- Darryl A Boyd
- Optical Sciences Division, US Naval Research Laboratory, 4555 Overlook Dr., SW, Washington, DC, USA
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Jussen D, Soltner H, Stute B, Wiechert W, von Lieres E, Pohl M. μMORE: A microfluidic magnetic oscillation reactor for accelerated parameter optimization in biocatalysis. J Biotechnol 2016; 231:174-182. [PMID: 27288595 DOI: 10.1016/j.jbiotec.2016.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 06/06/2016] [Accepted: 06/07/2016] [Indexed: 12/15/2022]
Abstract
Enzymatic parameter determination is an essential step in biocatalytic process development. Therefore higher throughput in miniaturized devices is urgently needed. An ideal microfluidic device should combine easy immobilization and retention of a minimal amount of biocatalyst with a well-mixed reaction volume. Together, all criteria are hardly met by current tools. Here we describe a microfluidic reactor (μMORE) which employs magnetic particles for both enzyme immobilization and efficient mixing using two permanent magnets placed in rotating cylinders next to the a glass chip reactor. The chip geometry and agitation speed was optimized by investigation of the mixing and retention characteristics using simulation and dye distribution analysis. Subsequently, the μMORE was successfully applied to determine critical biocatalytic process parameters in a parallelized manner for the carboligation of benzaldehyde and acetaldehyde to (S)-2-hydroxy-1-phenylpropan-1-one with less than 5μg of benzoylformate decarboxylase from Pseudomonas putida immobilized on magnetic beads. Here, one run of the device in six parallelized glass reactors took only 2-3h for an immobilized enzyme with very low activity (∼2U/mg). The optimized parameter set was finally tested in a 10mL enzyme membrane reactor, demonstrating that the μMORE provides a solid data base for biocatalytic process optimization.
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Affiliation(s)
- Daniel Jussen
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
| | - Helmut Soltner
- ZEA-1: Engineering and Technology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
| | - Birgit Stute
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
| | - Wolfgang Wiechert
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
| | - Eric von Lieres
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
| | - Martina Pohl
- IBG-1: Biotechnology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany.
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14
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Dai J, Li W, Gong B, Wang H, Xia M, Yang K. Measurement of the light scattering of single micrometer-sized particles captured with a microfluidic trap. OPTICS EXPRESS 2015; 23:30204-30215. [PMID: 26698501 DOI: 10.1364/oe.23.030204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Light scattering detection of a single particle is significant to both theoretical developments and application progresses of particle scattering. In this work, a new method employing the polydimethylsiloxane microfluidic catcher with self-regulation was developed to detect the light scattering of an individual micro particle (20.42, 23.75, and 31.10 μm) in a wide angular range. This system can rapidly (<2 min) immobilize single particles without aggregations and continuously analyze its light scattering ranging from 2° to 162°. The high success ratio of the capture, good agreement with the anticipation, and moderate time and cost make this method a promising candidate in single-particle-scattering applications.
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Abstract
This minireview discusses universal electronic modules (generic programmable units) and their use by analytical chemists to construct inexpensive, miniature or automated devices. Recently, open-source platforms have gained considerable popularity among tech-savvy chemists because their implementation often does not require expert knowledge and investment of funds. Thus, chemistry students and researchers can easily start implementing them after a few hours of reading tutorials and trial-and-error. Single-board microcontrollers and micro-computers such as Arduino, Teensy, Raspberry Pi or BeagleBone enable collecting experimental data with high precision as well as efficient control of electric potentials and actuation of mechanical systems. They are readily programmed using high-level languages, such as C, C++, JavaScript or Python. They can also be coupled with mobile consumer electronics, including smartphones as well as teleinformatic networks. More demanding analytical tasks require fast signal processing. Field-programmable gate arrays enable efficient and inexpensive prototyping of high-performance analytical platforms, thus becoming increasingly popular among analytical chemists. This minireview discusses the advantages and drawbacks of universal electronic modules, considering their application in prototyping and manufacture of intelligent analytical instrumentation.
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Affiliation(s)
- Pawel L Urban
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan
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16
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Hejazian M, Li W, Nguyen NT. Lab on a chip for continuous-flow magnetic cell separation. LAB ON A CHIP 2015; 15:959-70. [PMID: 25537573 DOI: 10.1039/c4lc01422g] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Separation of cells is a key application area of lab-on-a-chip (LOC) devices. Among the various methods, magnetic separation of cells utilizing microfluidic devices offers the merits of biocompatibility, efficiency, and simplicity. This review discusses the fundamental physics involved in using magnetic force to separate particles, and identifies the optimisation parameters and corresponding methods for increasing the magnetic force. The paper then elaborates the design considerations of LOC devices for continuous-flow magnetic cell separation. Examples from the recently published literature illustrate these state-of-the-art techniques.
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Affiliation(s)
- Majid Hejazian
- Queensland Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia.
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Berenguel-Alonso M, Granados X, Faraudo J, Alonso-Chamarro J, Puyol M. Magnetic actuator for the control and mixing of magnetic bead-based reactions on-chip. Anal Bioanal Chem 2014; 406:6607-16. [DOI: 10.1007/s00216-014-8100-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Revised: 08/07/2014] [Accepted: 08/08/2014] [Indexed: 10/24/2022]
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Yang R, Pagaduan JV, Yu M, Woolley AT. On chip preconcentration and fluorescence labeling of model proteins by use of monolithic columns: device fabrication, optimization, and automation. Anal Bioanal Chem 2014; 407:737-47. [PMID: 25012353 DOI: 10.1007/s00216-014-7988-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 06/16/2014] [Accepted: 06/20/2014] [Indexed: 12/20/2022]
Abstract
Microfluidic systems with monolithic columns have been developed for preconcentration and on-chip labeling of model proteins. Monoliths were prepared in microchannels by photopolymerization, and their properties were optimized by varying the composition and concentration of the monomers to improve flow and extraction. On-chip labeling of proteins was achieved by driving solutions through the monolith by use of voltage then incubating fluorescent dye with protein retained on the monolith. Subsequently, the labeled proteins were eluted, by applying voltages to reservoirs on the microdevice, and then detected, by monitoring laser-induced fluorescence. Monoliths prepared from octyl methacrylate combine the best protein retention with the possibility of separate elution of unattached fluorescent label with 50% acetonitrile. Finally, automated on-chip extraction and fluorescence labeling of a model protein were successfully demonstrated. This method involves facile sample pretreatment, and therefore has potential for production of integrated bioanalysis microchips.
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Affiliation(s)
- Rui Yang
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA
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Yoo JJ, Anderson MJ, Alligrant TM, Crooks RM. Electrochemical detection of insulating beads at subattomolar concentration via magnetic enrichment in a microfluidic device. Anal Chem 2014; 86:4302-7. [PMID: 24745602 DOI: 10.1021/ac404093c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We report electrochemical detection of collisions between individual magnetic microbeads, present at subattomolar concentrations, and electrode surfaces. This limit of detection is 4 orders of magnitude lower than has been reported previously, and it is enabled by using a magnetic field to preconcentrate the microbeads prior to detection in a microfluidic electrochemical cell. Importantly, the frequency of collisions between the microbeads and the electrode is not compromised by the low concentration of microbeads. These findings represent an unusual case of detecting individual electrochemical events at very low analyte concentration. In addition to experiments supporting these claims, finite-element simulations provide additional insights into the nature of the interactions between flowing microbeads and their influence on electrochemical processes.
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Affiliation(s)
- Jason J Yoo
- Department of Chemistry, Center for Electrochemistry, and the Center for Nano- and Molecular Science and Technology, The University of Texas at Austin , 105 East 24th Street Stop A5300, Austin, Texas 78712-1224, United States
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Kirleis MA, Mathews SA, Verbarg J, Erickson JS, Piqué A. Reconfigurable acquisition system with integrated optics for a portable flow cytometer. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:115109. [PMID: 24289439 DOI: 10.1063/1.4831835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Portable and inexpensive scientific instruments that are capable of performing point of care diagnostics are needed for applications such as disease detection and diagnosis in resource-poor settings, for water quality and food supply monitoring, and for biosurveillance activities in autonomous vehicles. In this paper, we describe the development of a compact flow cytometer built from three separate, customizable, and interchangeable modules. The instrument as configured in this work is being developed specifically for the detection of selected Centers for Disease Control (CDC) category B biothreat agents through a bead-based assay: E. coli O157:H7, Salmonella, Listeria, and Shigella. It has two-color excitation, three-color fluorescence and light scattering detection, embedded electronics, and capillary based flow. However, these attributes can be easily modified for other applications such as cluster of differentiation 4 (CD4) counting. Proof of concept is demonstrated through a 6-plex bead assay with the results compared to a commercially available benchtop-sized instrument.
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Affiliation(s)
- Matthew A Kirleis
- Naval Research Laboratory, 4555 Overlook Ave. SW, Washington, DC 20375, USA
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Verbarg J, Plath WD, Shriver-Lake LC, Howell PB, Erickson JS, Golden JP, Ligler FS. Catch and release: integrated system for multiplexed detection of bacteria. Anal Chem 2013; 85:4944-50. [PMID: 23631439 DOI: 10.1021/ac303801v] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An integrated system with automated immunomagnetic separation and processing of fluidic samples was demonstrated for multiplexed optical detection of bacterial targets. Mixtures of target-specific magnetic bead sets were processed in the NRL MagTrap with the aid of rotating magnet arrays that entrapped and moved the beads within the channel during reagent processing. Processing was performed in buffer and human serum matrixes with 10-fold dilutions in the range of 10(2)-10(6) cells/mL of target bacteria. Reversal of magnets' rotation post-processing released the beads back into the flow and moved them into the microflow cytometer for optical interrogation. Identification of the beads and the detection of PE fluorescence were performed simultaneously for multiplexed detection. Multiplexing was performed with specifically targeted bead sets to detect E. coli 0157.H7, Salmonella Common Structural Antigen, Listeria sp., and Shigella sp., dose-response curves were obtained, and limits of detection were calculated for each target in the buffer and clinical matrix. Additional tests demonstrated the potential for using the MagTrap to concentrate target from larger volumes of sample prior to the addition of assay reagents.
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Affiliation(s)
- Jasenka Verbarg
- Center for Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, DC 20375, United States
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Nge PN, Pagaduan JV, Yu M, Woolley AT. Microfluidic chips with reversed-phase monoliths for solid phase extraction and on-chip labeling. J Chromatogr A 2012; 1261:129-35. [PMID: 22995197 PMCID: PMC3463737 DOI: 10.1016/j.chroma.2012.08.095] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 08/28/2012] [Accepted: 08/29/2012] [Indexed: 01/13/2023]
Abstract
The integration of sample preparation methods into microfluidic devices provides automation necessary for achieving complete micro total analysis systems. We have developed a technique that combines on-chip sample enrichment with fluorescence labeling and purification. Polymer monoliths made from butyl methacrylate were fabricated in cyclic olefin copolymer microdevices and used for solid phase extraction. We studied the retention of fluorophores, amino acids and proteins on these columns. The retained samples were subsequently labeled with both Alexa Fluor 488 and Chromeo P503, and unreacted dye was rinsed off the column before sample elution. Additional purification was obtained from the differential retention of proteins and fluorescent labels. A linear relation between the eluted peak areas and concentrations of on-chip labeled heat shock protein 90 samples demonstrated the utility of this method for on-chip quantitation. Our fast and simple method of simultaneously concentrating and labeling samples on-chip is compatible with miniaturization and desirable for automated analysis.
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Affiliation(s)
- Pamela N. Nge
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Jayson V. Pagaduan
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Ming Yu
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
| | - Adam T. Woolley
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602
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Golden JP, Verbarg J, Howell PB, Shriver-Lake LC, Ligler FS. Automated processing integrated with a microflow cytometer for pathogen detection in clinical matrices. Biosens Bioelectron 2012; 40:10-6. [PMID: 22960010 DOI: 10.1016/j.bios.2012.08.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 08/04/2012] [Accepted: 08/07/2012] [Indexed: 02/01/2023]
Abstract
A spinning magnetic trap (MagTrap) for automated sample processing was integrated with a microflow cytometer capable of simultaneously detecting multiple targets to provide an automated sample-to-answer diagnosis in 40 min. After target capture on fluorescently coded magnetic microspheres, the magnetic trap automatically concentrated the fluorescently coded microspheres, separated the captured target from the sample matrix, and exposed the bound target sequentially to biotinylated tracer molecules and streptavidin-labeled phycoerythrin. The concentrated microspheres were then hydrodynamically focused in a microflow cytometer capable of 4-color analysis (two wavelengths for microsphere identification, one for light scatter to discriminate single microspheres and one for phycoerythrin bound to the target). A three-fold decrease in sample preparation time and an improved detection limit, independent of target preconcentration, was demonstrated for detection of Escherichia coli 0157:H7 using the MagTrap as compared to manual processing. Simultaneous analysis of positive and negative controls, along with the assay reagents specific for the target, was used to obtain dose-response curves, demonstrating the potential for quantification of pathogen load in buffer and serum.
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Affiliation(s)
- J P Golden
- Center for Bio/Molecular Science & Engineering, Naval Research Laboratory, Washington, DC 20375, USA
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