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Sucupira MVF, Argondizzo APC, Miguez M, de Araujo AEV, Silva LBR, Mello MB, Marques CFS, Brito E Cunha DRA, Bastos RC, de Paula VS, Amado Leon LA. Approaches to produce and characterize recombinant protein VP1-2A of HAV for serological rapid test application. J Virol Methods 2024; 323:114839. [PMID: 37923063 DOI: 10.1016/j.jviromet.2023.114839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/26/2023] [Accepted: 10/29/2023] [Indexed: 11/07/2023]
Abstract
Studies reporting the expression of hepatitis A virus (HAV) structural proteins, specifically recombinant VP1-2A containing an immunogenic activity, use the Escherichia coli system. Recombinant HAV proteins may represent a source of less expensive antigens for application in different diagnostic platforms. However, the formation of insoluble aggregates is an obstacle to obtaining large amounts of HAV proteins in their native form. To overcome this obstacle, some approaches were applied in this study to improve purification, solubility, and protein expression levels. Critical properties were evaluated. The introduction of another insertion codon to increase the protein concentration and vector activity was observed and verified by SDS-PAGE. The expression was established with 0.4 mM IPTG for 4 h at 37 °C. The VP1 protein was partially soluble at an isoeletric point (pI) of 6.45. The majority of HAV VP1-2A proteins measured 45.19 kDa in size and had a homogeneity of 53.58%. Multi-antigen print immunoassay (MAPIA) showed antigenicity at different HAV VP1-2A concentrations, and microsphere-based immunoassays showed a specificity of 100% and a sensitivity of 84%. HAV VP1-2A was characterized using different sensitivity methods to prove its biological activity, indicating its use as a tool for the diagnosis of Hepatitis A virus infection.
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Affiliation(s)
- Michel V F Sucupira
- Diagnostic Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil; Technological Development in Virology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Ana P C Argondizzo
- Recombinant Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Mariana Miguez
- Recombinant Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Anna E V de Araujo
- Recombinant Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Leila B R Silva
- Diagnostic Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Marcelle B Mello
- Diagnostic Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Christiane F S Marques
- Diagnostic Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Danielle R A Brito E Cunha
- Immunological Technology Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Renata C Bastos
- Macromolecules Laboratory, Immunobiological Technology Institute (Bio-Manguinhos), Fiocruz, Rio de Janeiro, Brazil
| | - Vanessa S de Paula
- Molecular Virology and Parasitology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
| | - Luciane A Amado Leon
- Technological Development in Virology Laboratory, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil.
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2
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Rudenko NV, Karatovskaya AP, Zamyatina AV, Malogolovkin AS, Oleinikov VA, Brovko FA, Kol’tsov AU, Lapteva OG, Kolbasov DV, Shepelyakovskaya AO. Bluetongue Virus Detection Using Microspheres Conjugated with Monoclonal Antibodies against Group-Specific Protein Vp7 by Flow Virometry. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1068162022040173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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3
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Manohara Reddy YV, Shin JH, Hwang J, Kweon DH, Choi CH, Park K, Kim SK, Madhavi G, Yi H, Park JP. Fine-tuning of MXene-nickel oxide-reduced graphene oxide nanocomposite bioelectrode: Sensor for the detection of influenza virus and viral protein. Biosens Bioelectron 2022; 214:114511. [DOI: 10.1016/j.bios.2022.114511] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 06/21/2022] [Accepted: 06/23/2022] [Indexed: 11/30/2022]
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4
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Dronina J, Samukaite-Bubniene U, Ramanavicius A. Advances and insights in the diagnosis of viral infections. J Nanobiotechnology 2021; 19:348. [PMID: 34717656 PMCID: PMC8556785 DOI: 10.1186/s12951-021-01081-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 10/11/2021] [Indexed: 12/15/2022] Open
Abstract
Viral infections are the most common among diseases that globally require around 60 percent of medical care. However, in the heat of the pandemic, there was a lack of medical equipment and inpatient facilities to provide all patients with viral infections. The detection of viral infections is possible in three general ways such as (i) direct virus detection, which is performed immediately 1-3 days after the infection, (ii) determination of antibodies against some virus proteins mainly observed during/after virus incubation period, (iii) detection of virus-induced disease when specific tissue changes in the organism. This review surveys some global pandemics from 1889 to 2020, virus types, which induced these pandemics, and symptoms of some viral diseases. Non-analytical methods such as radiology and microscopy also are overviewed. This review overlooks molecular analysis methods such as nucleic acid amplification, antibody-antigen complex determination, CRISPR-Cas system-based viral genome determination methods. Methods widely used in the certificated diagnostic laboratory for SARS-CoV-2, Influenza A, B, C, HIV, and other viruses during a viral pandemic are outlined. A comprehensive overview of molecular analytical methods has shown that the assay's sensitivity, accuracy, and suitability for virus detection depends on the choice of the number of regions in the viral open reading frame (ORF) genome sequence and the validity of the selected analytical method.
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Affiliation(s)
- Julija Dronina
- Laboratory of Nanotechnology, Department of Functional Materials and Electronics, Center for Physical Sciences and Technology, Sauletekio av. 3, Vilnius, Lithuania
- Department of Physical Chemistry, Faculty of Chemistry and Geoscience, Vilnius University, Naugarduko str. 24, 03225, Vilnius, Lithuania
| | - Urte Samukaite-Bubniene
- Department of Physical Chemistry, Faculty of Chemistry and Geoscience, Vilnius University, Naugarduko str. 24, 03225, Vilnius, Lithuania
| | - Arunas Ramanavicius
- Department of Physical Chemistry, Faculty of Chemistry and Geoscience, Vilnius University, Naugarduko str. 24, 03225, Vilnius, Lithuania.
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5
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Gao M, Lian H, Yu L, Gong M, Ma L, Zhou Y, Yu M, Yan X. Rolling circle amplification integrated with suspension bead array for ultrasensitive multiplex immunodetection of tumor markers. Anal Chim Acta 2019; 1048:75-84. [DOI: 10.1016/j.aca.2018.10.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 08/28/2018] [Accepted: 10/02/2018] [Indexed: 12/14/2022]
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6
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Camarasa CG, Cobo F. Application of MALDI-TOF Mass Spectrometry in Clinical Virology. THE USE OF MASS SPECTROMETRY TECHNOLOGY (MALDI-TOF) IN CLINICAL MICROBIOLOGY 2018. [PMCID: PMC7150354 DOI: 10.1016/b978-0-12-814451-0.00012-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Matrix-assisted laser desorption ionization–time-of-flight mass spectrometry (MALDI-TOF MS) is a diagnostic tool of microbial identification and characterization based on the detection of the mass of molecules. In the majority of clinical laboratories, this technology is currently being used mainly for bacterial diagnosis, but several approaches in the field of virology have been investigated. The introduction of this technology in clinical virology will improve the diagnosis of infections produced by viruses but also the discovery of mutations and variants of these microorganisms as well as the detection of antiviral resistance. This chapter is focused on the main current applications of MALDI-TOF MS techniques in clinical virology showing the state of the art with respect to this exciting new technology.
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7
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Zamora JLR, Aguilar HC. Flow virometry as a tool to study viruses. Methods 2017; 134-135:87-97. [PMID: 29258922 DOI: 10.1016/j.ymeth.2017.12.011] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Revised: 12/10/2017] [Accepted: 12/14/2017] [Indexed: 01/01/2023] Open
Abstract
In the last few decades, flow cytometry has redefined the field of biology, exponentially enhancing our understanding of cells, immunology, and microbiology. Flow cytometry recently gave birth to flow virometry, a new way to detect, analyze, and characterize single viral particles. Detection of viruses by flow cytometry is possible due to improvements in current flow cytometers, calibration, and tuning methods. We summarize the recent birth and novel uses of flow virometry and the progressive evolution of this tool to advance the field of virology. We also discuss the various flow virometry methods used to identify and analyze viruses. We briefly summarize other applications of flow virometry, including: virus detection, quantification, population discrimination, and viral particles' antigenic properties. Finally, we summarize how viral sorting will allow further progress of flow virometry to relate viral surface characteristics to infectivity properties.
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Affiliation(s)
| | - Hector C Aguilar
- Department of Microbiology and Immunology, Cornell University, Ithaca, NY 14853, USA.
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8
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Rapid Detection of Ochratoxin A in Malt by Cytometric Bead Array Based on Indirect Competition Principle. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2016. [DOI: 10.1016/s1872-2040(16)60927-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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9
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Li W, Jiang W, Dai S, Wang L. Multiplexed Detection of Cytokines Based on Dual Bar-Code Strategy and Single-Molecule Counting. Anal Chem 2016; 88:1578-84. [DOI: 10.1021/acs.analchem.5b03043] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Wei Li
- Key
Laboratory of Natural Products Chemical Biology, Ministry of Education,
School of Pharmacy, Shandong University, Jinan, 250012, P. R. China
| | - Wei Jiang
- School
of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China
| | - Shuang Dai
- Key
Laboratory of Natural Products Chemical Biology, Ministry of Education,
School of Pharmacy, Shandong University, Jinan, 250012, P. R. China
| | - Lei Wang
- Key
Laboratory of Natural Products Chemical Biology, Ministry of Education,
School of Pharmacy, Shandong University, Jinan, 250012, P. R. China
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10
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Lim JY, Nam JS, Yang SE, Shin H, Jang YH, Bae GU, Kang T, Lim KI, Choi Y. Identification of Newly Emerging Influenza Viruses by Surface-Enhanced Raman Spectroscopy. Anal Chem 2015; 87:11652-9. [DOI: 10.1021/acs.analchem.5b02661] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Jae-young Lim
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Jung-soo Nam
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Se-eun Yang
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Hyunku Shin
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
| | - Yoon-ha Jang
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Gyu-Un Bae
- Research
Center for Cell Fate Control, College of Pharmacy, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Taewook Kang
- Department of Chemical & Biomolecular Engineering, Sogang University, Seoul, 121-742, Korea
| | - Kwang-il Lim
- Department of Medical & Pharmaceutical Sciences, Sookmyung Women’s University, Seoul, 140-742, Korea
| | - Yeonho Choi
- Department
of Bio-convergence Engineering, Korea University, Seoul, 136-713, Korea
- School
of Biomedical Engineering, Korea University, Seoul, 136-713, Korea
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11
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Performance of a multiplexed serological microarray for the detection of antibodies against central nervous system pathogens. J Microbiol Methods 2014; 100:27-31. [PMID: 24594410 PMCID: PMC7172757 DOI: 10.1016/j.mimet.2014.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 12/31/2013] [Accepted: 02/20/2014] [Indexed: 01/11/2023]
Abstract
Central nervous system (CNS) infections have multiple potential causative agents for which simultaneous pathogen screening can provide a useful tool. This study evaluated a multiplexed microarray for the simultaneous detection of antibodies against CNS pathogens. The performance of selected microarray antigens for the detection of IgG antibodies against herpes simplex virus 1 and 2 (HSV-1 and HSV-2), varicella-zoster virus (VZV), adenovirus, Mycoplasma pneumoniae and Borrelia burgdorferi sensu lato, was evaluated using serum sample panels tested with reference assays used in a routine diagnostic laboratory. The microarray sensitivity for HSV-1, HSV-2, VZV, adenovirus and M. pneumonia ranged from 77% to 100%, and the specificity ranged from 74% to 97%. Very variable sensitivities and specificities were found for borrelial antigens of three different VlsE protein IR(6) peptide variants (IR6p1, IR6p2, IR6p4) and three recombinant decorin binding proteins A (DbpA; DbpAIa, DbpA91, DbpAG40). For single antigens, good specificity was shown for antigens of IR6p4 and DbpAIa (96%), while DbpA91, IR6p1 and IR6p2 were moderately specific (88–92%). The analytical sensitivity of the microarray was dependent on the borrelial IgG concentration of the specimen. The overall performance and technical features of the platform showed that the platform supports both recombinant proteins, whole viruses and peptides as antigens. This study showed diagnostic potential for all six CNS pathogens, including Borrelia burgdorferi sensu lato, using glutaraldehyde based microarray, and further highlighted the importance of careful antigen selection and the requirement for the use of multiple borrelial antigens in order to increase specificity without a major lack of sensitivity. To find a suitable microarray platform that supports different kinds of antigens To evaluate the feasibility of a multiplexed glutaraldehyde based microarray To detect simultaneously different viral and bacterial antibodies Performance of the platform proved promising
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12
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Cobo F. Application of maldi-tof mass spectrometry in clinical virology: a review. Open Virol J 2013; 7:84-90. [PMID: 24222805 PMCID: PMC3821086 DOI: 10.2174/1874357920130927003] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Revised: 08/01/2013] [Accepted: 08/02/2013] [Indexed: 01/05/2023] Open
Abstract
MALDI-TOF mass spectrometry is a diagnostic tool of microbial identification and characterization based on the detection of the mass of molecules. In the majority of clinical laboratories, this technology is currently being used mainly for bacterial diagnosis, but several approaches in the field of virology have been investigated. The introduction of this technology in clinical virology will improve the diagnosis of infections produced by viruses but also the discovery of mutations and variants of these microorganisms as well as the detection of antiviral resistance. This review is focused on the main current applications of MALDI-TOF MS techniques in clinical virology showing the state of the art with respect to this exciting new technology.
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Affiliation(s)
- Fernando Cobo
- Section of Microbiology (Integrated Biotechnology Area), Hospital de Poniente. El Ejido, Almería, Spain
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13
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Arakelyan A, Fitzgerald W, Margolis L, Grivel JC. Nanoparticle-based flow virometry for the analysis of individual virions. J Clin Invest 2013; 123:3716-27. [PMID: 23925291 PMCID: PMC3754246 DOI: 10.1172/jci67042] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 06/06/2013] [Indexed: 11/17/2022] Open
Abstract
While flow cytometry has been used to analyze the antigenic composition of individual cells, the antigenic makeup of viral particles is still characterized predominantly in bulk. Here, we describe a technology, "flow virometry," that can be used for antigen detection on individual virions. The technology is based on binding magnetic nanoparticles to virions, staining the virions with monoclonal antibodies, separating the formed complexes with magnetic columns, and characterizing them with flow cytometers. We used this technology to study the distribution of two antigens (HLA-DR and LFA-1) that HIV-1 acquires from infected cells among individual HIV-1 virions. Flow virometry revealed that the antigenic makeup of virions from a single preparation is heterogeneous. This heterogeneity could not be detected with bulk analysis of viruses. Moreover, in two preparations of the same HIV-1 produced by different cells, the distribution of antigens among virions was different. In contrast, HIV-1 of two different HIV-1 genotypes replicating in the same cells became somewhat antigenically similar. This nanotechnology allows the study of virions in bodily fluids without virus propagation and in principle is not restricted to the analysis of HIV, but can be applied to the analysis of the individual surface antigenic makeup of any virus.
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Affiliation(s)
- Anush Arakelyan
- Program in Physical Biology, Eunice Kennedy-Shriver National Institute of Child Health and Human Development, NIH, Bethesda, Maryland 20892, USA
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Chou J, Wong J, Christodoulides N, Floriano PN, Sanchez X, McDevitt J. Porous bead-based diagnostic platforms: bridging the gaps in healthcare. SENSORS (BASEL, SWITZERLAND) 2012; 12:15467-99. [PMID: 23202219 PMCID: PMC3522972 DOI: 10.3390/s121115467] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Revised: 10/25/2012] [Accepted: 11/01/2012] [Indexed: 01/11/2023]
Abstract
Advances in lab-on-a-chip systems have strong potential for multiplexed detection of a wide range of analytes with reduced sample and reagent volume; lower costs and shorter analysis times. The completion of high-fidelity multiplexed and multiclass assays remains a challenge for the medical microdevice field; as it struggles to achieve and expand upon at the point-of-care the quality of results that are achieved now routinely in remote laboratory settings. This review article serves to explore for the first time the key intersection of multiplexed bead-based detection systems with integrated microfluidic structures alongside porous capture elements together with biomarker validation studies. These strategically important elements are evaluated here in the context of platform generation as suitable for near-patient testing. Essential issues related to the scalability of these modular sensor ensembles are explored as are attempts to move such multiplexed and multiclass platforms into large-scale clinical trials. Recent efforts in these bead sensors have shown advantages over planar microarrays in terms of their capacity to generate multiplexed test results with shorter analysis times. Through high surface-to-volume ratios and encoding capabilities; porous bead-based ensembles; when combined with microfluidic elements; allow for high-throughput testing for enzymatic assays; general chemistries; protein; antibody and oligonucleotide applications.
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Affiliation(s)
- Jie Chou
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
| | - Jorge Wong
- Department of Chemistry, University of Texas at Austin, 1 University Station A5300, Austin, TX 78712, USA; E-Mail:
| | - Nicolaos Christodoulides
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Pierre N. Floriano
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - Ximena Sanchez
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
| | - John McDevitt
- Department of Bioengineering, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA; E-Mails: (J.C.); (N.C.); (P.N.F.); (X.S.)
- Department of Chemistry, Rice University, 6100 Main St MS-142, Houston, TX 77005, USA
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15
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Wang J, Cheng D, Chan JKL, Luo X, Wu H, Hsing IM. Yeast surface display-based microfluidic immunoassay. SENSORS AND ACTUATORS. B, CHEMICAL 2012; 166:878-883. [PMID: 32288242 PMCID: PMC7127699 DOI: 10.1016/j.snb.2012.02.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 02/16/2012] [Accepted: 02/19/2012] [Indexed: 05/28/2023]
Abstract
In this paper, we present a new microfluidic immunoassay platform, which is based on the synergistic combination of the yeast surface display (YSD) technique and the microfluidic technology. Utilizing the YSD technique, antigens specific to the target antibody are displayed on the surface of engineered yeast cells with intracellular fluorescent proteins. The displayed antigens are then used for the detection of the target antibody, with the yeast cells as fluorescent labels. Multiplex immunoassay can be readily realized by using yeast cells expressing different intracellular fluorescent proteins to display different antigens. The implementation of this YSD-based immunoassay on the microfluidic platform eliminates the need for the bulky, complex and expensive flow cytometer. To improve the detection sensitivity and to eliminate the need for pumping, a functionalized micro pillar array (MPA) is incorporated in the microfluidic chip, resulting in a detection limit of 5 ng/mL (or 1 ng in terms of amount) and enhanced compatibility with practical applications such as clinical biopsy. This new platform has a high potential to be integrated into microfluidic detection systems to enable portable diagnostics in the future.
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Affiliation(s)
- Jing Wang
- Bioengineering Graduate Program, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Danhui Cheng
- Bioengineering Graduate Program, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jay Kwok-Lun Chan
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Xiaoteng Luo
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Hongkai Wu
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - I-Ming Hsing
- Bioengineering Graduate Program, Division of Biomedical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
- Department of Chemical and Biomolecular Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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16
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Wang G, Zhang P, Dou H, Li W, Sun K, He X, Han J, Xiao H, Li Y. Efficient incorporation of quantum dots into porous microspheres through a solvent-evaporation approach. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6141-6150. [PMID: 22428794 DOI: 10.1021/la300066c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Quantum dot (QD)-encoded microspheres play an important role in suspension arrays by acting as supports for various reactions between biomolecules. With regard to QD-encoded microspheres utilized in suspension arrays, three key requirements are controllable size, abundant surface functional groups, and especially excellent fluorescence properties. In this paper, narrowly dispersed poly(styrene-co-divinylbenzene-co-methylacrylic acid) (PSDM) microspheres with specific size, surface carboxyl groups, and porous structures were synthesized by seeded copolymerization. In order to improve the incorporation efficiency of QDs within microspheres, we developed a swelling-evaporation approach in which the swelling process was combined with gradual evaporation of the solvent and thus gradual concentration of QDs in the dispersion solution. This approach was demonstrated to be an efficient method for improving the fluorescence intensity of resultant microspheres compared with the use of swelling alone. Moreover, the porous structure was shown to aid the penetration of QDs into the interiors of the microspheres. Through this approach, microspheres encoded with either single or multiple wavelength-emitting QDs were fabricated effectively. The suspension immunoassays were then founded based on the QD-encoded microspheres, by coating mouse antihuman chorionic gonadotropin as the probe for goat antimouse IgG detection. The positive results determined by Luminex 100 and the low cytotoxicity of the QD-encoded microspheres demonstrated their great potential in suspension arrays.
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Affiliation(s)
- Gang Wang
- The State Key Lab of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240 PR China
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17
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Zhao W, Zhang WP, Zhang ZL, He RL, Lin Y, Xie M, Wang HZ, Pang DW. Robust and Highly Sensitive Fluorescence Approach for Point-of-Care Virus Detection Based on Immunomagnetic Separation. Anal Chem 2012; 84:2358-65. [DOI: 10.1021/ac203102u] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Wei Zhao
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
| | - Wan-Po Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, P.
R. China
- State Key Laboratory
of Virology,
Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Zhi-Ling Zhang
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
| | - Rui-Li He
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
| | - Yi Lin
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
| | - Min Xie
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
| | - Han-Zhong Wang
- State Key Laboratory
of Virology,
Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Dai-Wen Pang
- Key Laboratory of Analytical
Chemistry for Biology and Medicine (Ministry of Education), College
of Chemistry and Molecular Sciences, Research Center for Nanobiology
and Nanomedicine (MOE 985 Innovative Platform) and State Key Laboratory
of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, 430072, P. R. China
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18
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Lai KK, Renneberg R, Mak WC. Multifunctional protein particles with dual analytical channels for colorimetric enzymatic bioassays and fluorescent immunoassays. Biosens Bioelectron 2012; 32:169-76. [PMID: 22204780 DOI: 10.1016/j.bios.2011.11.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 11/29/2011] [Accepted: 11/30/2011] [Indexed: 11/19/2022]
Abstract
Advanced multifunctional protein particles encapsulated enzymes and antibodies were developed for enzymatic bioassays and immunoassays with colorimetric and fluorescent channels. A colorimetric channel based on color-substrate precipitation was assigned for enzymatic bioassays for the measurement of hydrogen peroxide with the lowest detectable concentration of 10 μM. A fluorescent channel based on fluorescent labeled antibodies was assigned for immunoassays for the measurement of mouse immunoglobulin G (M IgG) with the lowest detectable concentration of 1.25 μgL(-1). The protein microparticles were fabricated with a template-assisted self-assembly technique termed "Protein Activation Spontaneous Self-assemble" (PASS). The multifunctional protein particles prepared with the PASS method have the advantages of high loading of analytical biomolecules, integrated biological functions, porous structure, and more importantly, they are optically transparent and fluorescence inactive. These unique features make our protein particles a new generation of bead-based platforms to perform enzyme bioassays and immunoassays.
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Affiliation(s)
- Kwok Kei Lai
- Department of Chemistry, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
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19
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Chen CH, Yang KL. Liquid crystal-based immunoassays for detecting hepatitis B antibody. Anal Biochem 2011; 421:321-3. [PMID: 22178912 DOI: 10.1016/j.ab.2011.11.007] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2011] [Revised: 10/30/2011] [Accepted: 11/08/2011] [Indexed: 11/16/2022]
Abstract
Conventional immunoassays are often fluorescence- or enzyme-based and require additional readout systems. Here, we report a liquid crystal (LC)-based immunoassay that features a new signal transduction mechanism, whereby the test results appear as colorful spots and can be viewed with the naked eye directly. By using the different colors of LC spots, we can estimate the range of anti-hepatitis B surface antigen concentrations between 300 and 15 nM. Because additional labeling process and readout systems are not required in this immunoassay, it is more suitable for point-of-care diagnosis of hepatitis B in resource-limited regions.
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Affiliation(s)
- Chih-Hsin Chen
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576, Singapore
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20
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Chou TC, Hsu W, Wang CH, Chen YJ, Fang JM. Rapid and specific influenza virus detection by functionalized magnetic nanoparticles and mass spectrometry. J Nanobiotechnology 2011; 9:52. [PMID: 22088100 PMCID: PMC3248366 DOI: 10.1186/1477-3155-9-52] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Accepted: 11/16/2011] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The timely and accurate diagnosis of specific influenza virus strains is crucial to effective prophylaxis, vaccine preparation and early antiviral therapy. The detection of influenza A viruses is mainly accomplished using polymerase chain reaction (PCR) techniques or antibody-based assays. In conjugation with the immunoassay utilizing monoclonal antibody, mass spectrometry is an alternative to identify proteins derived from a target influenza virus. Taking advantage of the large surface area-to-volume ratio, antibody-conjugated magnetic nanoparticles can act as an effective probe to extract influenza virus for sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) and on-bead mass spectrometric analysis. RESULTS Iron oxide magnetic nanoparticles (MNP) were functionalized with H5N2 viral antibodies targeting the hemagglutinin protein and capped with methoxy-terminated ethylene glycol to suppress nonspecific binding. The antibody-conjugated MNPs possessed a high specificity to H5N2 virus without cross-reactivity with recombinant H5N1 viruses. The unambiguous identification of the captured hemagglutinin on magnetic nanoparticles was realized by SDS-PAGE visualization and peptide sequence identification using liquid chromatography-tandem mass spectrometry (LC-MS/MS). CONCLUSIONS The assay combining efficient magnetic separation and MALDI-MS readout offers a rapid and sensitive method for virus screening. Direct on-MNP detection by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) provided high sensitivity (~10(3) EID(50) per mL) and a timely diagnosis within one hour. The magnetic nanoparticles encapsulated with monoclonal antibodies could be used as a specific probe to distinguish different subtypes of influenza.
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Affiliation(s)
- Tzu-Chi Chou
- Department of Chemistry, National Taiwan University, Taipei, 106, Taiwan
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21
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Chou CS, Lin LY, Chen KM, Lai SC. FlowCytomix analysis for Toxoplasma gondii infection in pregnant women in central Taiwan. J OBSTET GYNAECOL 2011; 31:375-9. [PMID: 21627416 DOI: 10.3109/01443615.2011.568073] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The study was to determine the seroprevalence of toxoplasmosis in the sera of pregnant women in central Taiwan and to investigate the levels of cytokine in the sera of pregnant women with Toxoplasma gondii infection. The 220 blood samples were collected from pregnant women. The haematological parameters of peripheral blood were analysed by a haematology analyser. Serum samples of the pregnant women were analysed by a commercially available anti-T. gondii IgM/IgG antibody enzyme-linked immunosorbent assay (ELISA) kit and FlowCytomix assays. Six (2.7%) of the sera samples had IgM anti-T. gondii antibodies, and twenty (9.1%) had T. gondii IgG seropositive. All six IgM seropositive samples had low IgG avidity, indicative of acute infection. Total white blood cells and eosinophils were statistically significantly increased (p<0.05) in pregnant women with T. gondii infection, as compared with healthy pregnant women. Th1 cytokines IFN-γ, IL-1β, IL-2 and IL-12 p70, and Th2 cytokines IL-10 in pregnant women with T. gondii IgM/IgG seropositive were significantly increased (p<0.05), as compared with healthy pregnant women. These results showed that both of Th1 and Th2 cytokines play an important role in the toxoplasmosis of pregnant women.
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Affiliation(s)
- C S Chou
- Institute of Medicine, Chung San Medical University, Taichung 402, Taiwan
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22
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Lien KY, Hung LY, Huang TB, Tsai YC, Lei HY, Lee GB. Rapid detection of influenza A virus infection utilizing an immunomagnetic bead-based microfluidic system. Biosens Bioelectron 2011; 26:3900-7. [PMID: 21466957 PMCID: PMC7127465 DOI: 10.1016/j.bios.2011.03.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 02/26/2011] [Accepted: 03/08/2011] [Indexed: 11/29/2022]
Abstract
This study reports a new immunomagnetic bead-based microfluidic system for the rapid detection of influenza A virus infection by performing a simple two-step diagnostic process that includes a magnetic bead-based fluorescent immunoassay (FIA) and an end-point optical analysis. With the incorporation of monoclonal antibody (mAb)-conjugated immunomagnetic beads, target influenza A viral particles such as A/H1N1 and A/H3N2 can be specifically recognized and are bound onto the surface of the immunomagnetic beads from the specimen sample. This is followed by labeling the fluorescent signal onto the virus-bound magnetic complexes by specific developing mAb with R-phycoerythrin (PE). Finally, the optical intensity of the magnetic complexes can be analyzed immediately by the optical detection module. Significantly, the limit of detection (LOD) of this immunomagnetic bead-based microfluidic system for the detection of influenza A virus in a specimen sample is approximately 5×10(-4) hemagglutin units (HAU), which is 1024 times better than compared to conventional bench-top systems using flow cytometry. More importantly, the entire diagnostic protocol, from the purification of target viral particles to optical detection of the magnetic complexes, can be automatically completed within 15 min in this immunomagnetic bead-based microfluidic system, which is only 8.5% of the time required when compared to a manual protocol. As a whole, this microfluidic system may provide a powerful platform for the rapid diagnosis of influenza A virus infection and may be extended for diagnosis of other types of infectious diseases with a high specificity and sensitivity.
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Key Words
- 2d, two-dimensional
- 3d, three-dimensional
- a.u., arbitrary unit
- aids, acquired immunodeficiency syndrome
- aiv, avian influenza virus
- bp, band-pass
- bsa, bovine serum albumin
- cdc, center for disease control
- cft, complement fixation test
- di, deionized
- dv, dengue virus
- dc, direct current
- dmem, dulbecco's modified eagle's medium
- elisa, enzyme-linked immunosorbent assay
- ev, enterovirus
- f/p, fluorochrome per mole of protein
- fia, fluorescent immunoassay
- ha, hemagglutinin
- hau, hemagglutin unit
- hi, hemagglutination inhibition
- if, immunofluorescence
- iu, international unit
- lod, limit of detection
- lp, long-pass
- mab, monoclonal antibody
- mems, micro-electro-mechanical-systems
- na, neuraminidase
- np, nucleoprotein
- pbs, phosphate-buffered saline
- pcr, polymerase chain reaction
- pdms, polydimethylsiloxane
- pe, r-phycoerythrin
- pfu, plaque-forming unit
- pmt, photo-multiplier tube
- rt-pcr, reverse-transcription polymerase chain reaction
- s, streptavidin
- sars, severe acute respiratory syndrome
- influenza virus
- magnetic bead
- fluorescent immunoassay
- microfluidics
- mems
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Affiliation(s)
- Kang-Yi Lien
- Institute of Nanotechnology and Microsystems Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Lien-Yu Hung
- Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan
| | - Tze-Bin Huang
- Department of Engineering Science, National Cheng Kung University, Tainan 701, Taiwan
| | - Yi-Che Tsai
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan 701, Taiwan
| | - Huan-Yao Lei
- Department of Microbiology and Immunology, National Cheng Kung University, Tainan 701, Taiwan
| | - Gwo-Bin Lee
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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23
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Oleinikov VA. Fluorescent semiconductor nanocrystals (quantum dots) in protein biochips. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2011; 37:171-89. [DOI: 10.1134/s1068162011020117] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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24
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Guo Y, Cheng D, Lee TY, Wang J, Hsing IM. New Immunoassay Platform Utilizing Yeast Surface Display and Direct Cell Counting. Anal Chem 2010; 82:9601-5. [DOI: 10.1021/ac102241k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yongchao Guo
- Department of Chemical and Biomolecular Engineering, Fok Ying Tung Graduate School, and Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Danhui Cheng
- Department of Chemical and Biomolecular Engineering, Fok Ying Tung Graduate School, and Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Tsz Yan Lee
- Department of Chemical and Biomolecular Engineering, Fok Ying Tung Graduate School, and Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jing Wang
- Department of Chemical and Biomolecular Engineering, Fok Ying Tung Graduate School, and Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - I-Ming Hsing
- Department of Chemical and Biomolecular Engineering, Fok Ying Tung Graduate School, and Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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25
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Jang KJ, Lee H, Jin HL, Park Y, Nam JM. Restriction-enzyme-coded gold-nanoparticle probes for multiplexed DNA detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:2665-8. [PMID: 19722184 DOI: 10.1002/smll.200901105] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- Kyung-Jin Jang
- Interdisciplinary Program in Nano-Science and Technology, Seoul National University, Seoul, South Korea
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26
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Foti L, Fonseca BDPFE, Nascimento LD, Marques CDFS, Silva EDD, Duarte CAB, Probst CM, Goldenberg S, Pinto AG, Krieger MA. Viability study of a multiplex diagnostic platform for Chagas disease. Mem Inst Oswaldo Cruz 2009; 104 Suppl 1:136-41. [DOI: 10.1590/s0074-02762009000900019] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Accepted: 06/16/2009] [Indexed: 01/20/2023] Open
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27
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Flow Cytometry: A Multipurpose Technology for a Wide Spectrum of Global Biosecurity Applications. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.jala.2009.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Flow cytometry, and its offspring-flow sorting, are extremely useful technologies for biosecurity and public health studies related to infectious disease. Applications range from environmental surveillance of pathogens to diagnosis and the development of vaccines and therapeutics for prevention and control of infectious diseases. Flow cytometers have been developed for laboratory analysis and field deployment. The current state of the art could enjoy more widespread use if instruments and data analysis were made simpler and had more automated functions, and if technology was modified to reduce biosafety concerns related to analysis and sorting of infectious organisms. The full spectrum of possible applications of flow cytometry technology to global biosecurity challenges has not yet been realized.
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28
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Apweiler R, Aslanidis C, Deufel T, Gerstner A, Hansen J, Hochstrasser D, Kellner R, Kubicek M, Lottspeich F, Maser E, Mewes HW, Meyer HE, Müllner S, Mutter W, Neumaier M, Nollau P, Nothwang HG, Ponten F, Radbruch A, Reinert K, Rothe G, Stockinger H, Tarnok A, Taussig MJ, Thiel A, Thiery J, Ueffing M, Valet G, Vandekerckhove J, Verhuven W, Wagener C, Wagner O, Schmitz G. Approaching clinical proteomics: current state and future fields of application in fluid proteomics. Clin Chem Lab Med 2009; 47:724-44. [DOI: 10.1515/cclm.2009.167] [Citation(s) in RCA: 98] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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29
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Ayriss J, Valero R, Bradbury ARM, Pavlik P. Multiplexed flow cytometry: high-throughput screening of single-chain antibodies. Methods Mol Biol 2009; 525:241-xiii. [PMID: 19252858 DOI: 10.1007/978-1-59745-554-1_12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The development of high-throughput screening (HTS) technologies has become essential for initial characterization of recombinant antibodies and alternative affinity reagents, selected from large combinatorial libraries. Such binding ligands are routinely selected against a single antigen and screened for desired binding specificities. Recent progress with genome sequencing projects has led to widespread efforts to study corresponding proteomes; requiring selection of ligands against large numbers of gene products in a highly parallel manner. The capabilities of many routine HTS methods such as enzyme-linked immunosorbent assay (ELISA), or array-based methods, are limited to analysis of numerous different antibody clones against a single target or, individual antibody clones against many different targets. We have developed a multiplexed flow cytometry screening method that allows analysis of individual binding ligands against numerous targets in the same analytical sample. The method produces a complex analytical profile for each antibody clone in the primary screen, by allowing simultaneous determination of relative expression levels, identification of non-specific binding, and discrimination of fine specificities. The quality and quantity of data, combined with significant reductions in analysis time and antigen consumption, provide notable advantages over other standard screening methods, such as ELISA. By combining HT screening capabilities with multiplex technology, we have redefined the parameters for the initial identification of affinity reagents recovered from combinatorial libraries and removed a significant bottleneck in the generation of affinity reagents on a proteomic scale.
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30
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Sukhanova A, Nabiev I. Fluorescent nanocrystal-encoded microbeads for multiplexed cancer imaging and diagnosis. Crit Rev Oncol Hematol 2008; 68:39-59. [PMID: 18621543 DOI: 10.1016/j.critrevonc.2008.05.006] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2008] [Revised: 05/19/2008] [Accepted: 05/22/2008] [Indexed: 11/25/2022] Open
Abstract
Bead-based assays on very large numbers of molecules in proteomics, genomics, drug screening and clinical diagnostics require encoding of each of the microbeads according to the particular ligand bound to its surface. The benefits of using optically encoded microbeads (instead of the solid-state two-dimensional arrays) are derived from the freedom of bead to move in three dimensions. Polymeric beads optically encoded with organic dyes allow for a limited number of unique codes whereas the use of semiconductor nanocrystals as fluorescent tags improves the beads multiplexed imaging capabilities, photostability and sensitivity of the antigen detection. Additionally, an employment of the recently demonstrated Förster resonance energy transfer (FRET) from the microbeads nanocrystal codes to the nearby antibody dye label allows for the very specific detection of the interaction between the microbead and the antibody. This interaction turns the fluorescence signal from dye label off and on thus effectively discriminating between the occurrence and the non-occurrence of antibody binding. The absence of fluorescent background from non-interacting with the beads dye-labelled antibodies additionally increases the sensitivity of detection and further facilitates the multiplexing capabilities of nanocrystals-based detection and diagnostics. This paper reviews the state-of-the-art results of development of microbeads optically encoded with the fluorescent nanocrystals "quantum dots" and their applications to proteomics for cancer antigens and autoantibodies imaging and diagnosis.
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Affiliation(s)
- Alyona Sukhanova
- EA no 3798 Détection et Approches Thérapeutiques Nanotechnologiques dans les Mécanismes Biologiques de Défense, Université de Reims Champagne-Ardenne, 51 rue Cognacq Jay, 51100 Reims, France
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31
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Schulze-Horsel J, Genzel Y, Reichl U. Flow cytometric monitoring of influenza A virus infection in MDCK cells during vaccine production. BMC Biotechnol 2008; 8:45. [PMID: 18447925 PMCID: PMC2408585 DOI: 10.1186/1472-6750-8-45] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2007] [Accepted: 04/30/2008] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In cell culture-based influenza vaccine production the monitoring of virus titres and cell physiology during infection is of great importance for process characterisation and optimisation. While conventional virus quantification methods give only virus titres in the culture broth, data obtained by fluorescence labelling of intracellular virus proteins provide additional information on infection dynamics. Flow cytometry represents a valuable tool to investigate the influences of cultivation conditions and process variations on virus replication and virus yields. RESULTS In this study, fluorescein-labelled monoclonal antibodies against influenza A virus matrix protein 1 and nucleoprotein were used for monitoring the infection status of adherent Madin-Darby canine kidney cells from bioreactor samples. Monoclonal antibody binding was shown for influenza A virus strains of different subtypes (H1N1, H1N2, H3N8) and host specificity (human, equine, swine). At high multiplicity of infection in a bioreactor, the onset of viral protein accumulation in adherent cells on microcarriers was detected at about 2 to 4 h post infection by flow cytometry. In contrast, a significant increase in titre by hemagglutination assay was detected at the earliest 4 to 6 h post infection. CONCLUSION It is shown that flow cytometry is a sensitive and robust method for the monitoring of viral infection in fixed cells from bioreactor samples. Therefore, it is a valuable addition to other detection methods of influenza virus infection such as immunotitration and RNA hybridisation. Thousands of individual cells are measured per sample. Thus, the presented method is believed to be quite independent of the concentration of infected cells (multiplicity of infection and total cell concentration) in bioreactors. This allows to perform detailed studies on factors relevant for optimization of virus yields in cell cultures. The method could also be used for process characterisation and investigations concerning reproducibility in vaccine manufacturing.
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Affiliation(s)
- Josef Schulze-Horsel
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106 Magdeburg, Germany
| | - Yvonne Genzel
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106 Magdeburg, Germany
| | - Udo Reichl
- Bioprocess Engineering, Max Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106 Magdeburg, Germany
- Lehrstuhl fuer Bioprozesstechnik, Otto-von-Guericke-Universitaet Magdeburg, P.O. box 4120, 39016 Magdeburg, Germany
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32
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Li J, Zhong W. A two-dimensional suspension array system by coupling field flow fractionation to flow cytometry. J Chromatogr A 2008; 1183:143-9. [PMID: 18243223 DOI: 10.1016/j.chroma.2008.01.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2007] [Revised: 01/08/2008] [Accepted: 01/14/2008] [Indexed: 10/22/2022]
Abstract
Flow field flow fractionation (Fl-FFF) was coupled to flow cytometry to improve the performance of suspension arrays. Size-based separation of the protein-conjugated microspheres by Fl-FFF was performed and the results demonstrated that, the separation could tolerate a wide range of carrier fluid conditions (pH values, salt concentrations, and buffer compositions) favorable for immunoassays. The immuno-complex remained intact during Fl-FFF, as revealed by fluorescence measurements before and after the Fl-FFF separation, and SDS-PAGE of the eluted proteins. The sample throughput of the suspension array can be increased several folds by using particles of different sizes and separating them with Fl-FFF before flow cytometric measurement. Moreover, the gel result hinted that the continuous wash inside the Fl-FFF system may lower the assay background, another possible advantage of the two-dimensional suspension array system.
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Affiliation(s)
- Jishan Li
- Department of Chemistry, University of California, Riverside, CA 92521, USA
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33
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Matsunaga T, Maeda Y, Yoshino T, Takeyama H, Takahashi M, Ginya H, Aasahina J, Tajima H. Fully automated immunoassay for detection of prostate-specific antigen using nano-magnetic beads and micro-polystyrene bead composites, ‘Beads on Beads’. Anal Chim Acta 2007; 597:331-9. [PMID: 17683747 DOI: 10.1016/j.aca.2007.05.065] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Revised: 05/21/2007] [Accepted: 05/23/2007] [Indexed: 11/29/2022]
Abstract
Magnetic beads have served as a conventional bioassay platform in biotechnology. In this study, a fully automated immunoassay was performed using novel nano- and microbead-composites constructed by assembling nano-magnetic beads onto polystyrene microbeads, designated 'Beads on Beads'. Nano-sized bacterial magnetic particles (BacMPs) displaying the immunoglobulin G (IgG)-binding domain of protein A (ZZ domain) were used for the construction of 'Beads on Beads' via the interaction of biotin-streptavidin. The efficient assembly of 'Beads on Beads' was performed by gradual addition of biotin-labeled BacMPs onto streptavidin-coated polystyrene microbeads. Approximately 2000 BacMPs were uniformly assembled on a single microbead without aggregation. The constructed 'Beads on Beads' were magnetized and separated from the suspension by using an automated magnetic separation system with a higher efficiency than BacMPs alone. Furthermore, fully automated detection of prostate-specific antigens was performed with the detection limit of 1.48 ng mL(-1). From this preliminary assay, it can be seen that 'Beads on Beads' could be a powerful tool in the development of high-throughput, fully automated multiplexed bioassays.
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Affiliation(s)
- Tadashi Matsunaga
- Department of Biotechnology, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan.
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Wilson R, Cossins AR, Spiller DG. Encoded microcarriers for high-throughput multiplexed detection. Angew Chem Int Ed Engl 2007; 45:6104-17. [PMID: 16941506 DOI: 10.1002/anie.200600288] [Citation(s) in RCA: 326] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Since the decoding of the human genome, the quest to obtain more and more molecular information from smaller and smaller samples is intensifying. Today the burden of this challenge is being borne by planar arrays, but the quality of the data provided by this approach is limited by variations in performance between different arrays. Suspension arrays of encoded microspheres provide higher quality data, but the amount of molecular information that can be acquired with them is limited by the number of codes that can be distinguished in the same sample. New methods of preparing encoded particles promise to alleviate this problem, but in the face of a growing number of new technologies it is sometimes difficult to decide which, if any, will succeed. Herein we appraise these new forms of encoded particle critically, and ask if they can deliver the necessary multiplexing power and whether they will perform well in multiplexed assays.
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Affiliation(s)
- Robert Wilson
- Department of Chemistry, Liverpool University, Liverpool L69 7ZD, UK.
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35
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Parallel processing in microbiology: Detection of infectious pathogens by Luminex xMAP multiplexed suspension array technology. ACTA ACUST UNITED AC 2007. [DOI: 10.1016/j.clinmicnews.2007.05.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Wilson R, Cossins AR, Spiller DG. Codierte Mikropartikel für Hochdurchsatz-Mehrfachanalysen. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200600288] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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