1
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Yuan D, Yadav S, Ta HT, Fallahi H, An H, Kashaninejad N, Ooi CH, Nguyen NT, Zhang J. Investigation of viscoelastic focusing of particles and cells in a zigzag microchannel. Electrophoresis 2021; 42:2230-2237. [PMID: 34396540 DOI: 10.1002/elps.202100126] [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] [Received: 04/30/2021] [Revised: 07/26/2021] [Accepted: 08/05/2021] [Indexed: 12/13/2022]
Abstract
Microfluidic particle focusing has been a vital prerequisite step in sample preparation for downstream particle separation, counting, detection, or analysis, and has attracted broad applications in biomedical and chemical areas. Besides all the active and passive focusing methods in Newtonian fluids, particle focusing in viscoelastic fluids has been attracting increasing interest because of its advantages induced by intrinsic fluid property. However, to achieve a well-defined focusing position, there is a need to extend channel lengths when focusing micrometer-sized or sub-microsized particles, which would result in the size increase of the microfluidic devices. This work investigated the sheathless viscoelastic focusing of particles and cells in a zigzag microfluidic channel. Benefit from the zigzag structure of the channel, the channel length and the footprint of the device can be reduced without sacrificing the focusing performance. In this work, the viscoelastic focusing, including the focusing of 10 μm polystyrene particles, 5 μm polystyrene particles, 5 μm magnetic particles, white blood cells (WBCs), red blood cells (RBCs), and cancer cells, were all demonstrated. Moreover, magnetophoretic separation of magnetic and nonmagnetic particles after viscoelastic pre-focusing was shown. This focusing technique has the potential to be used in a range of biomedical applications.
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Affiliation(s)
- Dan Yuan
- Centre for Regional and Rural Futures, Deakin University, Geelong, Victoria, 3216, Australia
| | - Sharda Yadav
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Hang T Ta
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Hedieh Fallahi
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Hongjie An
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Navid Kashaninejad
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Chin Hong Ooi
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
| | - Jun Zhang
- Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan, Queensland, 4111, Australia
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2
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Chakraborty S. Electrokinetics with blood. Electrophoresis 2018; 40:180-189. [DOI: 10.1002/elps.201800353] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/13/2018] [Accepted: 09/14/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Suman Chakraborty
- Department of Mechanical Engineering; Indian Institute of Technology Kharagpur; Kharagpur India
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3
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Yuan D, Tan SH, Sluyter R, Zhao Q, Yan S, Nguyen NT, Guo J, Zhang J, Li W. On-Chip Microparticle and Cell Washing Using Coflow of Viscoelastic Fluid and Newtonian Fluid. Anal Chem 2017; 89:9574-9582. [DOI: 10.1021/acs.analchem.7b02671] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Dan Yuan
- School
of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Say Hwa Tan
- Queensland
Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | - Ronald Sluyter
- School
of Biological Sciences, University of Wollongong, Wollongong, NSW 2522, Australia
- Illawarra Health and Medical Research Institute, Wollongong, NSW 2522 Australia
| | - Qianbin Zhao
- School
of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - Sheng Yan
- School
of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
| | - N. T. Nguyen
- Queensland
Micro- and Nanotechnology Centre, Griffith University, Brisbane, QLD 4111, Australia
| | - Jinhong Guo
- School
of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Jun Zhang
- School
of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Weihua Li
- School
of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia
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4
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Two-layer electro-osmotic flow and heat transfer in a hydrophobic micro-channel with fluid–solid interfacial slip and zeta potential difference. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.06.050] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Tarn MD, Elders LT, Peyman SA, Pamme N. Diamagnetic repulsion of particles for multilaminar flow assays. RSC Adv 2015. [DOI: 10.1039/c5ra21867e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A continuous multilaminar flow reaction was performed on functionalised polymer particlesviadiamagnetic repulsion forces, using a simple, inexpensive setup.
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6
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Dudani JS, Go DE, Gossett DR, Tan AP, Di Carlo D. Mediating Millisecond Reaction Time around Particles and Cells. Anal Chem 2014; 86:1502-10. [DOI: 10.1021/ac402920m] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Jaideep S. Dudani
- Department
of Bioengineering, University of California Los Angeles, 420 Westwood Plaza, 5121
Engineering V, Box 951600, Los Angeles, California 90095, United States
| | - Derek E. Go
- Department
of Bioengineering, University of California Los Angeles, 420 Westwood Plaza, 5121
Engineering V, Box 951600, Los Angeles, California 90095, United States
| | - Daniel R. Gossett
- Department
of Bioengineering, University of California Los Angeles, 420 Westwood Plaza, 5121
Engineering V, Box 951600, Los Angeles, California 90095, United States
- California NanoSystems Institute, Los Angeles, California 90095, United States
| | - Andrew P. Tan
- Department
of Bioengineering, University of California Los Angeles, 420 Westwood Plaza, 5121
Engineering V, Box 951600, Los Angeles, California 90095, United States
| | - Dino Di Carlo
- Department
of Bioengineering, University of California Los Angeles, 420 Westwood Plaza, 5121
Engineering V, Box 951600, Los Angeles, California 90095, United States
- California NanoSystems Institute, Los Angeles, California 90095, United States
- Jonsson Comprehensive Cancer Center, Los
Angeles, California 90095, United States
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7
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Tarn MD, Lopez-Martinez MJ, Pamme N. On-chip processing of particles and cells via multilaminar flow streams. Anal Bioanal Chem 2013; 406:139-61. [DOI: 10.1007/s00216-013-7363-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Revised: 09/09/2013] [Accepted: 09/10/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Mark D Tarn
- Department of Chemistry, The University of Hull, Cottingham Road, Hull, HU6 7RX, UK
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8
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Sasso LA, Johnston IH, Zheng M, Gupte RK, Ündar A, Zahn JD. Automated microfluidic processing platform for multiplexed magnetic bead immunoassays. MICROFLUIDICS AND NANOFLUIDICS 2012; 13:603-612. [PMID: 26366143 PMCID: PMC4564126 DOI: 10.1007/s10404-012-0980-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
A microfluidic platform is presented which fully automates all incubation steps of a three-stage, multiplexed magnetic bead immunoassay, such as the Luminex® xMAP technology. Magnetic actuation is used to transfer the microbeads between co-infused adjacent laminar flow streams to transport the beads into and out of incubation and wash solutions, with extended incubation channels to allow sufficient bead incubation times (1-30 min, commonly 5 min per stage) to enable high-sensitivity. The serial incubation steps of the immunoassay are completed in succession within the device with no operator interaction, and the continuous flow operation with magnetic bead transfer defines the incubation sequencing requiring no external fluidic controls beyond syringe pump infusion. The binding kinetics of the assay is empirically characterized to determine the required incubation times for specific assay sensitivities in the range 1 pg/ml to 100 ng/ml. By using a Luminex® xMAP duplex assay, concurrent detection of IL-6 and TNF-α was demonstrated on-chip with a detection range 10 pg/ml to 1 ng/ml. This technology enables rapid automation of magnetic microbead assays, and has the potential to perform continuous concentration monitoring.
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Affiliation(s)
- Lawrence A. Sasso
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Ian H. Johnston
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Mingde Zheng
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Rohit K. Gupte
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Akif Ündar
- Penn State Hershey Pediatric Cardiovascular Research Center, Department of Pediatrics, Surgery, and Bioengineering, Penn State Milton S. Hershey Medical Center, Penn State College of Medicine, Penn State Children’s Hospital, Hershey, PA, 17033-0850, USA
| | - Jeffrey D. Zahn
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Room 311, 599 Taylor Road, Piscataway, NJ 08854, USA
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Songjaroen T, Dungchai W, Chailapakul O, Henry CS, Laiwattanapaisal W. Blood separation on microfluidic paper-based analytical devices. LAB ON A CHIP 2012; 12:3392-8. [PMID: 22782449 DOI: 10.1039/c2lc21299d] [Citation(s) in RCA: 197] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
A microfluidic paper-based analytical device (μPAD) for the separation of blood plasma from whole blood is described. The device can separate plasma from whole blood and quantify plasma proteins in a single step. The μPAD was fabricated using the wax dipping method, and the final device was composed of a blood separation membrane combined with patterned Whatman No.1 paper. Blood separation membranes, LF1, MF1, VF1 and VF2 were tested for blood separation on the μPAD. The LF1 membrane was found to be the most suitable for blood separations when fabricating the μPAD by wax dipping. For blood separation, the blood cells (both red and white) were trapped on blood separation membrane allowing pure plasma to flow to the detection zone by capillary force. The LF1-μPAD was shown to be functional with human whole blood of 24-55% hematocrit without dilution, and effectively separated blood cells from plasma within 2 min when blood volumes of between 15-22 μL were added to the device. Microscopy was used to confirm that the device isolated plasma with high purity with no blood cells or cell hemolysis in the detection zone. The efficiency of blood separation on the μPAD was studied by plasma protein detection using the bromocresol green (BCG) colorimetric assay. The results revealed that protein detection on the μPAD was not significantly different from the conventional method (p > 0.05, pair t-test). The colorimetric measurement reproducibility on the μPAD was 2.62% (n = 10) and 5.84% (n = 30) for within-day and between day precision, respectively. Our proposed blood separation on μPAD has the potential for reducing turnaround time, sample volume, sample preparation and detection processes for clinical diagnosis and point-of care testing.
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Affiliation(s)
- Temsiri Songjaroen
- Graduate Program in Clinical Biochemistry and Molecular Medicine, Faculty of Allied Health Sciences, Chulalongkorn University, Patumwan, Bangkok, 10330, Thailand
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10
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Gossett DR, Tse HTK, Dudani JS, Goda K, Woods TA, Graves SW, Di Carlo D. Inertial manipulation and transfer of microparticles across laminar fluid streams. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:2757-64. [PMID: 22761059 DOI: 10.1002/smll.201200588] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Indexed: 05/08/2023]
Abstract
A general strategy for controlling particle movement across streams would enable new capabilities in single-cell analysis, solid-phase reaction control, and biophysics research. Transferring cells across streams is difficult to achieve in a well-controlled manner, since it requires precise control of fluid flow along with external force fields or precisely manufactured mechanical structures. Herein a strategy is introduced for particle transfer based on passive inertial lift forces and shifts in the distribution of these forces for channels with shifting aspect ratios. Uniquely, use of the dominant wall-effect lift parallel to the particle rotation direction is explored and utilized to achieve controllable cross-stream motion. In this way, particles are positioned to migrate across laminar streams and enter a new solution without significant disturbance of the interface at rates exceeding 1000 particles per second and sub-millisecond transfer times. The capabilities of rapid inertial solution exchange (RInSE) for preparation of hematological samples and other cellular assays are demonstrated. Lastly, improvements to inline flow cytometry after RInSE of excess fluorescent dye and focusing for downstream analysis are characterized. The described approach is simply applied to manipulating cells and particles and quickly exposing them to or removing them from a reacting solution, with broader applications in control and analysis of low affinity interactions on cells or particles.
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Affiliation(s)
- Daniel R Gossett
- Department of Bioengineering, University of California Los Angeles, 90095-1600, USA
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11
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Oh KW, Lee K, Ahn B, Furlani EP. Design of pressure-driven microfluidic networks using electric circuit analogy. LAB ON A CHIP 2012; 12:515-45. [PMID: 22179505 DOI: 10.1039/c2lc20799k] [Citation(s) in RCA: 248] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This article reviews the application of electric circuit methods for the analysis of pressure-driven microfluidic networks with an emphasis on concentration- and flow-dependent systems. The application of circuit methods to microfluidics is based on the analogous behaviour of hydraulic and electric circuits with correlations of pressure to voltage, volumetric flow rate to current, and hydraulic to electric resistance. Circuit analysis enables rapid predictions of pressure-driven laminar flow in microchannels and is very useful for designing complex microfluidic networks in advance of fabrication. This article provides a comprehensive overview of the physics of pressure-driven laminar flow, the formal analogy between electric and hydraulic circuits, applications of circuit theory to microfluidic network-based devices, recent development and applications of concentration- and flow-dependent microfluidic networks, and promising future applications. The lab-on-a-chip (LOC) and microfluidics community will gain insightful ideas and practical design strategies for developing unique microfluidic network-based devices to address a broad range of biological, chemical, pharmaceutical, and other scientific and technical challenges.
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Affiliation(s)
- Kwang W Oh
- SMALL (Sensors and MicroActuators Learning Lab), Department of Electrical Engineering, University at Buffalo, The State University of New York at Buffalo (SUNY-Buffalo), New York 14260, USA.
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12
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Yoo SK, Kim YM, Yoon SY, Kwon HS, Lee JH, Yang S. Bead packing and release using flexible polydimethylsiloxane membrane for semi-continuous biosensing. Artif Organs 2011; 35:E136-44. [PMID: 21658079 DOI: 10.1111/j.1525-1594.2011.01240.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The continuous or semi-continuous biosensing of systemic inflammatory responses is important both during and after cardiopulmonary bypass (CPB) procedures. A bead packing and release method, which is able repetitively to capture and release receptor-coated beads within microfluidic channels, is herein advanced for use in semi-continuous biosensing. The receptor-coated beads are compacted and concentrated at specific locations in the device using an elastomeric valve. This concentration creates a localized bioreactor in which the binding of the antigen with the functionalized beads can be made more effective. After the reaction and detection have taken place, the beads can be released and a new assay carried out. We demonstrated the operation of our device using streptavidin-coated beads and biotin-4-fluorescein (B4F). The high sensitivity of the device allows it to detect a B4F concentration of 50 pg/mL after an incubation time of 5 min. We also tested our device in the semi-continuous immunoassay of interleukin (IL)-6, which is one of the proinflammatory cytokines. The assay demonstrated the linear dependence of the intensity of fluorescence at concentrations of IL-6 from 10 to 250 pg/mL, which is a physiologically important range for CPB procedures.
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Affiliation(s)
- Sung Keun Yoo
- School of Mechatronics, Gwangju Institute of Science and Technology, Buk-gu, Gwangju, Korea
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13
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Sasso LA, Ündar A, Zahn JD. Autonomous magnetically actuated continuous flow microimmunofluorocytometry assay. MICROFLUIDICS AND NANOFLUIDICS 2010; 9:253-265. [PMID: 20694166 PMCID: PMC2916684 DOI: 10.1007/s10404-009-0543-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This article presents a microfluidic device which integrates autonomous serial immunofluorocytometry binding reactions of cytometric beads with fluorescence detection and quantification in a continuous flow environment. The microdevice assay is intended to alleviate the extensive benchwork and large sample volumes used when conducting traditional immunoassays, without requiring complex external controls. The technology is based on the miniaturization and automation of the serial processing steps of an antigen sandwich immunoassay, with integrated fluorescence detection using paramagnetic microbeads. The continuous flow design may enable temporal tracking of time-varying protein concentrations in a continuously infused sample for clinical applications, specifically for monitoring inflammation marker proteins in blood produced during cardiac surgeries involving cardiopulmonary bypass (CPB) procedures. The device operation was first validated via a single incubation device which measured the concentration of a fluorescently labeled biotin molecule using streptavidin-coated paramagnetic cytometric beads. Subsequently, a dual incubation device was tested with samples of the anaphylatoxin complement protein C3a, and was shown to be capable of differentiating between samples at typical systemic concentrations of the protein (1-5 mug/ml), with very low sample usage (<6 mul/h). It is believed that this continuous flow, automated microimmunosensor technology will be a platform for high sample rate immunoassays capable of tracking and more thoroughly characterizing the systemic inflammation process, and may aid in the development of better treatment options for systemic inflammation during and after CPB.
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Affiliation(s)
- Lawrence A. Sasso
- BioMEMS Laboratory, Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Room 370, 599 Taylor Road, Piscataway, NJ 08854, USA
| | - Akif Ündar
- Department of Pediatrics, Surgery, and Bioengineering, Penn State College of Medicine, Penn State Children’s Hospital, Penn State Hershey Pediatric Cardiovascular Research Center, Penn State Milton S. Hershey Medical Center, Room C6525, Hershey, PA 17033-0850, USA
| | - Jeffrey D. Zahn
- Department of Biomedical Engineering, Rutgers, The State University of New Jersey, Room 311, 599 Taylor Road, Piscataway, NJ 08854, USA
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Umstead TM, Lu CJK, Freeman WM, Myers JL, Clark JB, Thomas NJ, Chinchilli VM, Vrana KE, Undar A, Phelps DS. Dual-platform proteomics study of plasma biomarkers in pediatric patients undergoing cardiopulmonary bypass. Pediatr Res 2010; 67:641-9. [PMID: 20308938 DOI: 10.1203/pdr.0b013e3181dceef5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Plasma samples from pediatric cardiac patients undergoing cardiopulmonary bypass (CPB) procedures were used to identify and characterize patterns of changes in potential biomarkers related to tissue damage and inflammation. These included proteins associated with systemic inflammatory response syndrome. Potential biomarkers were identified using a dual-platform proteomics approach requiring approximately 150 microL of plasma, which included two-dimensional difference gel electrophoresis (2D-DIGE) and a multiplexed immunoassay. Methods used in the dual approach measured levels of 129 proteins in plasma from pediatric CPB patients. Of these, 70 proteins changed significantly (p<0.05) between time points, and 36 of these retained significance after the highly stringent Bonferroni correction [p<0.001 for 2D-DIGE and p<0.00056 for multianalyte profile (MAP) assays]. Many of the changing proteins were associated with tissue damage, inflammation, and oxidative stress. This study uses a novel approach that combines two discovery proteomics techniques to identify a pattern of potential biomarkers changing after CPB. This approach required only 150 microL of plasma per time point and provided quantitative information on 129 proteins. The changes in levels of expression of these proteins may provide insight into the understanding, treatment, and prevention of systemic inflammation, thereby helping to improve the outcomes of pediatric CPB patients.
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Affiliation(s)
- Todd M Umstead
- Department of Pediatrics, Pennsylvania State University College of Medicine, Hershey, Pennsylvania 17033, USA
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15
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Undar A, Pauliks L, Clark JB, Zahn J, Rosenberg G, Kunselman AR, Sun Q, Pekkan K, Saliba K, Carney E, Thomas N, Freeman W, Vrana K, El-Banayosy A, Ural SH, Wilson R, Umstead TM, Floros J, Phelps DS, Weiss W, Snyder A, Yang S, Kimatian S, Cyran SE, Chinchilli VM, Guan Y, Rider A, Haines N, Rogerson A, Alkan-Bozkaya T, Akcevin A, Sun K, Wang S, Cun L, Myers JL. Penn State Hershey--center for pediatric cardiovascular research. Artif Organs 2009; 33:883-7. [PMID: 20021467 PMCID: PMC2797544 DOI: 10.1111/j.1525-1594.2009.00889.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Ino K, Shiku H, Ozawa F, Yasukawa T, Matsue T. Manipulation of microparticles for construction of array patterns by negative dielectrophoresis using multilayered array and grid electrodes. Biotechnol Bioeng 2009; 104:709-18. [DOI: 10.1002/bit.22445] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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17
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Hemodynamic Energy Delivery of the Pulsatile Flow in a Simulated Pediatric Extracorporeal Circuit. ASAIO J 2009; 55:96-9. [DOI: 10.1097/mat.0b013e31818fb9fb] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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18
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Howell PB, Golden JP, Hilliard LR, Erickson JS, Mott DR, Ligler FS. Two simple and rugged designs for creating microfluidic sheath flow. LAB ON A CHIP 2008; 8:1097-103. [PMID: 18584084 PMCID: PMC2751611 DOI: 10.1039/b719381e] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
A simple design capable of 2-dimensional hydrodynamic focusing is proposed and successfully demonstrated. In the past, most microfluidic sheath flow systems have often only confined the sample solution on the sides, leaving the top and bottom of the sample stream in contact with the floor and ceiling of the channel. While relatively simple to build, these designs increase the risk of adsorption of sample components to the top and bottom of the channel. A few designs have been successful in completely sheathing the sample stream, but these typically require multiple sheath inputs and several alignment steps. In the designs presented here, full sheathing is accomplished using as few as one sheath input, which eliminates the need to carefully balance the flow of two or more sheath inlets. The design is easily manufactured using current microfabrication techniques. Furthermore, the sample and sheath fluid can be subsequently separated for recapture of the sample fluid or re-use of the sheath fluid. Designs were demonstrated in poly(dimethylsiloxane) (PDMS) using soft lithography and poly(methyl methacrylate) (PMMA) using micromilling and laser ablation.
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Affiliation(s)
- Peter B. Howell
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375-5348, USA
| | - Joel P. Golden
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375-5348, USA
| | - Lisa R. Hilliard
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375-5348, USA
| | - Jeffrey S. Erickson
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375-5348, USA
| | - David R. Mott
- Laboratory for Computational Physics and Fluid Dynamics, Naval Research Laboratory, Washington, DC 20375, USA
| | - Frances S. Ligler
- Center for Bio/Molecular Science and Engineering, Naval Research Laboratory, Washington, DC 20375-5348, USA
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19
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Yamada M, Kobayashi J, Yamato M, Seki M, Okano T. Millisecond treatment of cells using microfluidic devices via two-step carrier-medium exchange. LAB ON A CHIP 2008; 8:772-778. [PMID: 18432348 DOI: 10.1039/b718281c] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We present herein a simple but versatile microfluidic system for the treatment of cells with millisecond chemical stimulus, by rapidly exchanging the carrier-medium of cells twice in a microchannel. A technique we refer to as 'hydrodynamic filtration' has been employed for the exchange of medium, in which the virtual width of flow in the microchannel determines the size of filtered cells/particles. The treatment time of cells could be rigidly adjusted by controlling the inlet flow rates and by changing the volume of the stimulating area in the microchannel. In the experiment, two types of microdevices were designed and fabricated, and at first, the ability for carrier-medium exchange was confirmed. As an application of the presented system, we examined the influence of the treatment time of HeLa cells with Triton X-100, a non-ionic surfactant used to solubilize the cellular membrane, on cell viability, varying the average treatment time from 17 to 210 ms. Both quantitative and qualitative analyses were performed to estimate the damage on cell membrane, demonstrating that the cell viability dramatically decreased when the treatment time was longer than approximately 40 ms. The obtained results demonstrated the ability of the presented system to conduct the rapid stimulation of cells, which would be useful for the analysis of biochemical reactions at the cell surface.
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Affiliation(s)
- Masumi Yamada
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
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20
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Tornay R, Braschler T, Demierre N, Steitz B, Finka A, Hofmann H, Hubbell JA, Renaud P. Dielectrophoresis-based particle exchanger for the manipulation and surface functionalization of particles. LAB ON A CHIP 2008; 8:267-73. [PMID: 18231665 DOI: 10.1039/b713776a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We present a microfluidic device where micro- and nanoparticles can be continuously functionalized in flow. This device relies on an element called "particle exchanger", which allows for particles to be taken from one medium and exposed to some reagent while minimizing mixing of the two liquids. In the exchanger, two liquids are brought in contact and particles are pushed from one to the other by the application of a dielectrophoretic force. We determined the maximum flow velocity at which all the particles are exchanged for a range of particle sizes. We also present a simple theory that accounts for the behaviour of the device when the particle size is scaled. Diffusion mixing in the exchanger is also evaluated. Finally, we demonstrate particle functionalization within the microfluidic device by coupling a fluorescent tag to avidin-modified 880 nm particles. The concept presented in this paper has been developed for synthesis of modified particles but is also applicable to on-chip bead-based chemistry or cellular biology.
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Affiliation(s)
- Raphaël Tornay
- Microsystem Laboratory, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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