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Kim Y, Abafogi AT, Tran BM, Kim J, Lee J, Chen Z, Bae PK, Park K, Shin YB, van Noort D, Lee NY, Park S. Integrated Microfluidic Preconcentration and Nucleic Amplification System for Detection of Influenza A Virus H1N1 in Saliva. MICROMACHINES 2020; 11:E203. [PMID: 32079062 PMCID: PMC7074655 DOI: 10.3390/mi11020203] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 02/10/2020] [Accepted: 02/13/2020] [Indexed: 12/27/2022]
Abstract
Influenza A viruses are often present in environmental and clinical samples at concentrations below the limit of detection (LOD) of molecular diagnostics. Here we report an integrated microfluidic preconcentration and nucleic amplification system (μFPNAS) which enables both preconcentration of influenza A virus H1N1 (H1N1) and amplification of its viral RNA, thereby lowering LOD for H1N1. H1N1 virus particles were first magnetically preconcentrated using magnetic nanoparticles conjugated with an antibody specific for the virus. Their isolated RNA was amplified to cDNA through thermocycling in a trapezoidal chamber of the μFPNAS. A detection limit as low as 100 TCID50 (50% tissue culture infective dose) in saliva can be obtained within 2 hours. These results suggest that the LOD of molecular diagnostics for virus can be lowered by systematically combining immunomagnetic separation and reverse transcriptase-polymerase chain reaction (RT-PCR) in one microfluidic device.
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Affiliation(s)
- Yonghee Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
| | - Abdurhaman Teyib Abafogi
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
| | - Buu Minh Tran
- Department of BioNano Technology, College of BioNano Technology, Gachon University, Seongnam 13120, Korea; (B.M.T.); (N.Y.L.)
| | - Jaewon Kim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
| | - Jinyeop Lee
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
| | - Zhenzhong Chen
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
| | - Pan Kee Bae
- BioNano Health Guard Research Center (H-GUARD), Daejeon 34141, Korea; (P.K.B.); (K.P.); (Y.-B.S.)
| | - Kyoungsook Park
- BioNano Health Guard Research Center (H-GUARD), Daejeon 34141, Korea; (P.K.B.); (K.P.); (Y.-B.S.)
| | - Yong-Beom Shin
- BioNano Health Guard Research Center (H-GUARD), Daejeon 34141, Korea; (P.K.B.); (K.P.); (Y.-B.S.)
- Bionanotechnology Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Korea
- Department of bioengineering, KRIBB School, University of science and Technology (UST), Daejeon 34141, Korea
| | - Danny van Noort
- Department of Physics, Chemistry and Biology, Linköping University, 581 83 Linköping, Sweden
- Chair of Micro Process Engineering and Technology (COMPETE), University of Ljubljana, 1000 Ljubljana, Slovenia
- Centro de Investigación en Bioingeniería -BIO, Universidad de Ingenieria y Tecnologia—UTEC, Barranco 15036, Peru
| | - Nae Yoon Lee
- Department of BioNano Technology, College of BioNano Technology, Gachon University, Seongnam 13120, Korea; (B.M.T.); (N.Y.L.)
| | - Sungsu Park
- School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Korea; (Y.K.); (A.T.A.); (J.K.); (J.L.); (Z.C.)
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea
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Development of a generic microfluidic device for simultaneous detection of antibodies and nucleic acids in oral fluids. BIOMED RESEARCH INTERNATIONAL 2013; 2013:543294. [PMID: 23509739 PMCID: PMC3586469 DOI: 10.1155/2013/543294] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Accepted: 12/30/2012] [Indexed: 12/03/2022]
Abstract
A prototype dual-path microfluidic device (Rheonix CARD) capable of performing simultaneously screening (antigen or antibody) and confirmatory (nucleic acid) detection of pathogens is described. The device fully integrates sample processing, antigen or antibody detection, and nucleic acid amplification and detection, demonstrating rapid and inexpensive “sample-to-result” diagnosis with performance comparable to benchtop analysis. For the chip design, a modular approach was followed allowing the optimization of individual steps in the sample processing process. This modular design provides great versatility accommodating different disease targets independently of the production method. In the detection module, a lateral flow (LF) protocol utilizing upconverting phosphor (UCP) reporters was employed. The nucleic acid (NA) module incorporates a generic microtube containing dry reagents. Lateral flow strips and PCR primers determine the target or disease that is diagnosed. Diagnosis of HIV infection was used as a model to investigate the simultaneous detection of both human antibodies against the virus and viral RNA. The serological result is available in less than 30 min, and the confirmation by RNA amplification takes another 60 min. This approach combines a core serological portable diagnostic with a nucleic acid-based confirmatory test.
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Development of a panel of recombinase polymerase amplification assays for detection of biothreat agents. J Clin Microbiol 2013; 51:1110-7. [PMID: 23345286 DOI: 10.1128/jcm.02704-12] [Citation(s) in RCA: 136] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Syndromic panels for infectious disease have been suggested to be of value in point-of-care diagnostics for developing countries and for biodefense. To test the performance of isothermal recombinase polymerase amplification (RPA) assays, we developed a panel of 10 RPAs for biothreat agents. The panel included RPAs for Francisella tularensis, Yersinia pestis, Bacillus anthracis, variola virus, and reverse transcriptase RPA (RT-RPA) assays for Rift Valley fever virus, Ebola virus, Sudan virus, and Marburg virus. Their analytical sensitivities ranged from 16 to 21 molecules detected (probit analysis) for the majority of RPA and RT-RPA assays. A magnetic bead-based total nucleic acid extraction method was combined with the RPAs and tested using inactivated whole organisms spiked into plasma. The RPA showed comparable sensitivities to real-time RCR assays in these extracts. The run times of the assays at 42°C ranged from 6 to 10 min, and they showed no cross-detection of any of the target genomes of the panel nor of the human genome. The RPAs therefore seem suitable for the implementation of syndromic panels onto microfluidic platforms.
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Abstract
Tuberculosis of the spine is one of the most common spine pathology in India. Over last 4 decades a lot has changed in the diagnosis, medical treatment and surgical procedures to treat this disorder. Further developments in diagnosis using molecular genetic techniques, more effective antibiotics and more aggressive surgical protocols have become essential with emergence of multidrug resistant TB. Surgical procedures such as single stage anterior and posterior stabilization, extrapleral dorsal spine anterior stabilization and endoscopic thoracoscopic surgeries have reduced the mortality and morbidity of the surgical procedures. is rapidly progressing. It is a challenge to treat MDR-TB Spine with late onset paraplegia and progressive deformity. Physicians must treat tuberculosis of spine on the basis of Culture and sensitivity.
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Affiliation(s)
- Vinod Agrawal
- Department of Orthopaedics, Lilavati Hospital and Research Centre, Mumbai, India
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Park S, Zhang Y, Lin S, Wang TH, Yang S. Advances in microfluidic PCR for point-of-care infectious disease diagnostics. Biotechnol Adv 2011; 29:830-9. [PMID: 21741465 DOI: 10.1016/j.biotechadv.2011.06.017] [Citation(s) in RCA: 218] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Revised: 05/14/2011] [Accepted: 06/22/2011] [Indexed: 12/20/2022]
Abstract
Global burdens from existing or emerging infectious diseases emphasize the need for point-of-care (POC) diagnostics to enhance timely recognition and intervention. Molecular approaches based on PCR methods have made significant inroads by improving detection time and accuracy but are still largely hampered by resource-intensive processing in centralized laboratories, thereby precluding their routine bedside- or field-use. Microfluidic technologies have enabled miniaturization of PCR processes onto a chip device with potential benefits including speed, cost, portability, throughput, and automation. In this review, we provide an overview of recent advances in microfluidic PCR technologies and discuss practical issues and perspectives related to implementing them into infectious disease diagnostics.
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Affiliation(s)
- Seungkyung Park
- Department of Emergency Medicine, Johns Hopkins University, Baltimore, MD 21205, USA
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Yeung SN, Butler A, Mackenzie PJ. Applications of the polymerase chain reaction in clinical ophthalmology. Can J Ophthalmol 2009; 44:23-30. [PMID: 19169309 DOI: 10.3129/i08-161] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Molecular biology has become a valuable component in many areas of medicine, including ophthalmology. Polymerase chain reaction (PCR) is the most widely used tool. It has proven to be a powerful technique in diagnosis and quantification of microorganisms and antibiotic resistance screening. For a growing number of ophthalmic conditions PCR testing can be conducted. It is therefore important that clinicians be knowledgeable about the indications, strengths, and limitations of the technique. The purpose of this review is to explore the current role of PCR in the diagnosis and management of eye disease.
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Affiliation(s)
- Sonia N Yeung
- Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, BC.
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