1
|
Dai J, Xing Y, Xiao L, Li J, Cao R, He Y, Fang H, Periasamy A, Oberhozler J, Jin L, Landers JP, Wang Y, Li X. Microfluidic Disc-on-a-Chip Device for Mouse Intervertebral Disc-Pitching a Next-Generation Research Platform To Study Disc Degeneration. ACS Biomater Sci Eng 2019; 5:2041-2051. [PMID: 31763444 DOI: 10.1021/acsbiomaterials.8b01522] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Low back pain is the most common cause of disability worldwide, and intervertebral disc degeneration is a major cause of low back pain. Unfortunately, discogenic low back pain is often treated with symptomatic relief interventions, as no disease-modifying medications are yet available. Both to-be-deciphered disc biology/pathology and inadequate in vitro research platform are major hurdles limiting drug discovery progress for disc degeneration. Here, we developed a microfluidic disc-on-a-chip device tailored for mouse disc organ as an in vitro research platform. We hypothesize that continuous nutrients empowered by a microfluidic device would improve biological performance of cultured mouse discs compared to those in static condition. This device permitted continuous media flow to mimic in vivo disc microenvironment. Intriguingly, mouse discs cultured on the microfluidic device exhibited much higher cell viability, better preserved structure integrity and anabolic-catabolic metabolism in both nucleus pulposus and annulus fibrosus, for up to 21 days compared to those in static culture. This first "disc-on-a-chip" device lays groundwork for future preclinical studies in a relative long-term organ culture given the chronic nature of intervertebral disc degeneration. In addition, this platform is readily transformable into a streamlined in vitro research platform to recapitulate physiological and pathophysiological microenvironment to accelerate disc research.
Collapse
Affiliation(s)
- Jun Dai
- Department of Orthopaedic Surgery, University of Virginia, 135 Hospital Drive, Charlottesville, Virginia 22908, United States.,Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue Qiaokou District, Wuhan 430030, P.R. China
| | - Yuan Xing
- Department of Surgery, University of Virginia, 345 Cripell Drive, Charlottesville, Virginia 22908, United States
| | - Li Xiao
- Department of Orthopaedic Surgery, University of Virginia, 135 Hospital Drive, Charlottesville, Virginia 22908, United States
| | - Jingyi Li
- ∥ Department of Chemistry, University of Virginia, 409 McCormick Road, Charlottesville, Virginia 22904, United States
| | - Ruofan Cao
- W.M. Keck Center for Cellular Imaging, University of Virginia, 90 Geldard Drive, Charlottesville, Virginia 22904, United States
| | - Yi He
- Department of Surgery, University of Virginia, 345 Cripell Drive, Charlottesville, Virginia 22908, United States
| | - Huang Fang
- Department of Orthopaedic Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue Qiaokou District, Wuhan 430030, P.R. China
| | - Ammasi Periasamy
- W.M. Keck Center for Cellular Imaging, University of Virginia, 90 Geldard Drive, Charlottesville, Virginia 22904, United States
| | - Jose Oberhozler
- Department of Surgery, University of Virginia, 345 Cripell Drive, Charlottesville, Virginia 22908, United States
| | - Li Jin
- Department of Orthopaedic Surgery, University of Virginia, 135 Hospital Drive, Charlottesville, Virginia 22908, United States
| | - James P Landers
- ∥ Department of Chemistry, University of Virginia, 409 McCormick Road, Charlottesville, Virginia 22904, United States.,Department of Mechanical and Aerospace Engineering, University of Virginia, 122 Engineer's Way, Charlottesville, Virginia 22904, United States.,Department of Pathology, University of Virginia, 415 Lane Road, Charlottesville, Virginia 22908, United States
| | - Yong Wang
- Department of Surgery, University of Virginia, 345 Cripell Drive, Charlottesville, Virginia 22908, United States
| | - Xudong Li
- Department of Orthopaedic Surgery, University of Virginia, 135 Hospital Drive, Charlottesville, Virginia 22908, United States.,Department of Biomedical Engineering, University of Virginia, 415 Lane Road, Charlottesville, Virginia 22908, United States
| |
Collapse
|
2
|
Nelson DA, Hughes JD, Engel CE, Haverstick DM, Landers JP. Use of Dual-Force Aggregation as a Multiplexed, Rapid Point-of-Care Screening Method for White Blood Cell Counting from Whole Blood Samples. J Appl Lab Med 2017; 2:92-97. [PMID: 33636970 DOI: 10.1373/jalm.2016.022475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 03/07/2017] [Indexed: 11/06/2022]
Abstract
BACKGROUND Enumeration of blood cells is an integral metric for evaluating patient health and can be used to screen for a wide range of diseases and conditions. Conventional methods rely on large, expensive, and complicated instrumentation that requires trained technicians and is not amenable to point-of-care analysis. This work demonstrates the use of a multiplexed, bead-based assay for both rapid white blood cell (WBC) count screening and accurate, multiplexed WBC counts for point-of-care analysis. METHODS Blood samples were lysed and diluted before being incubated with silica-coated magnetic particles under chaotropic conditions, a rotating magnetic field, and a source of agitation. The resulting bead aggregation was imaged and correlated to a known WBC count. After establishing standard curves, the WBC count for 18 whole blood samples were determined by this method and compared to values obtained conventionally. RESULTS When the optimal dilution factor for lysis of whole blood samples was established, 17 of 18 samples (94.4%) were correctly screened and categorized as having high, typical, or low WBC count, while 14 of 18 samples were within 16% of the reported clinical values. The developed system provides analysis of 13 samples in <3 min with a total analysis time of approximately 10 min (including incubation and dilution) and represents comparable throughput to conventional instrumentation, while providing point-of-care capability with reduced size (14 × 21 × 14 cm) and simplicity. CONCLUSIONS This work demonstrates the potential for a multiplexed, bead-based assay to be used as a rapid, point-of-care screening method for WBC counting from whole blood samples.
Collapse
Affiliation(s)
| | | | | | | | - James P Landers
- Departments of Chemistry.,Pathology, and.,Mechanical Engineering, University of Virginia, Charlottesville, VA
| |
Collapse
|
3
|
Ouyang Y, Li J, Haverstick DM, Landers JP. Rotation-Driven Microfluidic Disc for White Blood Cell Enumeration Using Magnetic Bead Aggregation. Anal Chem 2016; 88:11046-11054. [DOI: 10.1021/acs.analchem.6b02903] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Yiwen Ouyang
- Department
of Chemistry, University of Virginia, McCormick Road,
P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Jingyi Li
- Department
of Chemistry, University of Virginia, McCormick Road,
P.O. Box 400319, Charlottesville, Virginia 22904, United States
| | - Doris M. Haverstick
- Department
of Pathology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, United States
| | - James P. Landers
- Department
of Chemistry, University of Virginia, McCormick Road,
P.O. Box 400319, Charlottesville, Virginia 22904, United States
- Department
of Pathology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, United States
- Department
of Mechanical Engineering, University of Virginia, Engineer’s
Way, Charlottesville, Virginia 22904, United States
| |
Collapse
|
4
|
Schrittwieser S, Pelaz B, Parak WJ, Lentijo-Mozo S, Soulantica K, Dieckhoff J, Ludwig F, Guenther A, Tschöpe A, Schotter J. Homogeneous Biosensing Based on Magnetic Particle Labels. SENSORS 2016; 16:s16060828. [PMID: 27275824 PMCID: PMC4934254 DOI: 10.3390/s16060828] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 05/30/2016] [Accepted: 06/01/2016] [Indexed: 12/17/2022]
Abstract
The growing availability of biomarker panels for molecular diagnostics is leading to an increasing need for fast and sensitive biosensing technologies that are applicable to point-of-care testing. In that regard, homogeneous measurement principles are especially relevant as they usually do not require extensive sample preparation procedures, thus reducing the total analysis time and maximizing ease-of-use. In this review, we focus on homogeneous biosensors for the in vitro detection of biomarkers. Within this broad range of biosensors, we concentrate on methods that apply magnetic particle labels. The advantage of such methods lies in the added possibility to manipulate the particle labels by applied magnetic fields, which can be exploited, for example, to decrease incubation times or to enhance the signal-to-noise-ratio of the measurement signal by applying frequency-selective detection. In our review, we discriminate the corresponding methods based on the nature of the acquired measurement signal, which can either be based on magnetic or optical detection. The underlying measurement principles of the different techniques are discussed, and biosensing examples for all techniques are reported, thereby demonstrating the broad applicability of homogeneous in vitro biosensing based on magnetic particle label actuation.
Collapse
Affiliation(s)
- Stefan Schrittwieser
- Molecular Diagnostics, AIT Austrian Institute of Technology, Vienna1220, Austria.
| | - Beatriz Pelaz
- Fachbereich Physik, Philipps-Universität Marburg, Marburg 35037, Germany.
| | - Wolfgang J Parak
- Fachbereich Physik, Philipps-Universität Marburg, Marburg 35037, Germany.
| | - Sergio Lentijo-Mozo
- Laboratoire de Physique et Chimie des Nano-objets (LPCNO), Université de Toulouse, INSA, UPS, CNRS, Toulouse 31077, France.
| | - Katerina Soulantica
- Laboratoire de Physique et Chimie des Nano-objets (LPCNO), Université de Toulouse, INSA, UPS, CNRS, Toulouse 31077, France.
| | - Jan Dieckhoff
- Institute of Electrical Measurement and Fundamental Electrical Engineering, TU Braunschweig, Braunschweig 38106, Germany.
| | - Frank Ludwig
- Institute of Electrical Measurement and Fundamental Electrical Engineering, TU Braunschweig, Braunschweig 38106, Germany.
| | - Annegret Guenther
- Experimentalphysik, Universität des Saarlandes, Saarbrücken 66123, Germany.
| | - Andreas Tschöpe
- Experimentalphysik, Universität des Saarlandes, Saarbrücken 66123, Germany.
| | - Joerg Schotter
- Molecular Diagnostics, AIT Austrian Institute of Technology, Vienna1220, Austria.
| |
Collapse
|
5
|
Liu Q, Chernish A, DuVall JA, Ouyang Y, Li J, Qian Q, Bazydlo LAL, Haverstick DM, Landers JP. The ARTμS: a novel microfluidic CD4+ T-cell enumeration system for monitoring antiretroviral therapy in HIV patients. LAB ON A CHIP 2016; 16:506-514. [PMID: 26687070 DOI: 10.1039/c5lc01153a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report on a novel and cost-effective microfluidic platform that integrates immunomagnetic separation and cell enumeration via DNA-induced bead aggregation. Using a two-stage immunocapture microdevice, 10 μL of whole blood was processed to isolate CD4+ T-cells. The first stage involved the immuno-subtraction of monocytes by anti-CD14 magnetic beads, followed by CD4+ T-cell capture with anti-CD4 magnetic beads. The super hydrophilic surface generated during polydimethylsiloxane (PDMS) plasma treatment allowed for accurate metering of the CD4+ T-cell lysate, which then interacted with silica-coated magnetic beads under chaotropic conditions to form aggregates. Images of the resulting aggregates were captured and processed to reveal the mass of DNA, which was used to back-calculate the CD4+ T-cell number. Studies with clinical samples revealed that the analysis of blood within 24 hours of phlebotomy yielded the best results. Under these conditions, an accurate cell count was achieved (R(2) = 0.98) when compared to cell enumeration via flow cytometry, and over a functional dynamic range from 106-2337 cells per μL.
Collapse
Affiliation(s)
- Qian Liu
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Center For Microsystems For The Life Sciences, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Alexis Chernish
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA.
| | - Jacquelyn A DuVall
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Center For Microsystems For The Life Sciences, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Yiwen Ouyang
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Center For Microsystems For The Life Sciences, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Jingyi Li
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Center For Microsystems For The Life Sciences, University of Virginia, Charlottesville, Virginia 22904, USA
| | - Qiang Qian
- Department of Chemical Engineering, University of Virginia, Charlottesville, VA 22904, USA
| | - Lindsay A L Bazydlo
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Department of Pathology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, USA
| | - Doris M Haverstick
- Department of Pathology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, USA
| | - James P Landers
- Department of Chemistry, University of Virginia, McCormick Road, P. O. Box 400319, Charlottesville, Virginia 22904, USA. and Department of Pathology, University of Virginia Health Science Center, Charlottesville, Virginia 22908, USA
| |
Collapse
|
6
|
DuVall JA, Borba JC, Shafagati N, Luzader D, Shukla N, Li J, Kehn-Hall K, Kendall MM, Feldman SH, Landers JP. Optical Imaging of Paramagnetic Bead-DNA Aggregation Inhibition Allows for Low Copy Number Detection of Infectious Pathogens. PLoS One 2015; 10:e0129830. [PMID: 26068926 PMCID: PMC4466016 DOI: 10.1371/journal.pone.0129830] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 05/13/2015] [Indexed: 11/18/2022] Open
Abstract
DNA-paramagnetic silica bead aggregation in a rotating magnetic field facilitates the quantification of DNA with femtogram sensitivity, but yields no sequence-specific information. Here we provide an original description of aggregation inhibition for the detection of DNA and RNA in a sequence-specific manner following loop-mediated isothermal amplification (LAMP). The fragments generated via LAMP fail to induce chaotrope-mediated bead aggregation; however, due to their ability to passivate the bead surface, they effectively inhibit bead aggregation by longer 'trigger' DNA. We demonstrate the utility of aggregation inhibition as a method for the detection of bacterial and viral pathogens with sensitivity that approaches single copies of the target. We successfully use this methodology for the detection of notable food-borne pathogens Escherichia coli O157:H7 and Salmonella enterica, as well as Rift Valley fever virus, a weaponizable virus of national security concern. We also show the concentration dependence of aggregation inhibition, suggesting the potential for quantification of target nucleic acid in clinical and environmental samples. Lastly, we demonstrate the ability to rapidly detect infectious pathogens by utilizing a cell phone and custom-written application (App), making this novel detection modality fully portable for point-of-care use.
Collapse
Affiliation(s)
- Jacquelyn A. DuVall
- Department of Chemistry, University of Virginia, Charlottesville, VA, United States of America
| | - Juliane C. Borba
- Department of Chemistry, University of Virginia, Charlottesville, VA, United States of America
| | - Nazly Shafagati
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA, United States of America
| | - Deborah Luzader
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, United States of America
| | - Nishant Shukla
- Department of Computer Science, University of Virginia, Charlottesville, VA, United States of America
| | - Jingyi Li
- Department of Chemistry, University of Virginia, Charlottesville, VA, United States of America
| | - Kylene Kehn-Hall
- National Center for Biodefense and Infectious Diseases, George Mason University, Manassas, VA, United States of America
| | - Melissa M. Kendall
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, United States of America
| | - Sanford H. Feldman
- Center for Comparative Medicine, University of Virginia, Charlottesville, VA, United States of America
| | - James P. Landers
- Department of Chemistry, University of Virginia, Charlottesville, VA, United States of America
- Department of Mechanical Engineering, University of Virginia, Charlottesville, VA, United States of America
- Department of Pathology, University of Virginia, Charlottesville, VA, United States of America
- * E-mail:
| |
Collapse
|
7
|
Inexpensive, rapid prototyping of microfluidic devices using overhead transparencies and a laser print, cut and laminate fabrication method. Nat Protoc 2015; 10:875-86. [DOI: 10.1038/nprot.2015.051] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|