1
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Le TN, Descanzo MJN, Hsiao WWW, Soo PC, Peng WP, Chang HC. Fluorescent nanodiamond immunosensors for clinical diagnostics of tuberculosis. J Mater Chem B 2024; 12:3533-3542. [PMID: 38526339 DOI: 10.1039/d3tb03038e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Fluorescent nanodiamonds (FNDs) are carbon nanoparticles containing a dense ensemble of nitrogen-vacancy defects as color centers. These centers have exceptional photostability and unique quantum properties, making them useful for ultrasensitive biosensing applications. This work employed FNDs conjugated with antibodies as magneto-optical immunosensors for tuberculosis (TB) diagnostics using competitive spin-enhanced lateral flow immunoassay (SELFIA). ESAT6 (6-kDa early secretory antigenic target) of Mycobacterium tuberculosis is a clinical marker of TB. We evaluated the assay's performance using the recombinant ESAT6 antigen and its antibodies noncovalently coated on FNDs. A detection limit of ∼0.02 ng mL-1 was achieved with the lateral flow membrane strip pre-structured with a narrow channel of 1 mm width. Adopting a cut-off value of 24.0 ng mm-1 for 100-nm FNDs on the strips, the method detected 49 out of 50 clinical samples with Mycobacterium tuberculosis complexes. In contrast, none of the assays for 10 clinical samples with non-tuberculous mycobacteria (NTM) isolates exhibited the presence of ESAT6. These results suggest that the SELFIA platform is applicable for TB detection and can differentiate TB from NTM infections, which also affect the human respiratory system. The FND-enabled immunosensing techniques are versatile and promising for early detection of TB and other diseases, opening a new avenue for biomedical applications of carbon-based nanomaterials.
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Affiliation(s)
- Trong-Nghia Le
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.
| | | | - Wesley W-W Hsiao
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Po-Chi Soo
- Department of Laboratory Medicine and Biotechnology, Tzu Chi University, Hualien 97004, Taiwan
- Department of Internal Medicine, Buddhist Tzu Chi General Hospital and Tzu Chi University, Hualien 97004, Taiwan
| | - Wen-Ping Peng
- Department of Physics, National Dong Hwa University, Shoufeng, Hualien 97401, Taiwan
| | - Huan-Cheng Chang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Department of Chemistry, National Taiwan Normal University, Taipei 106, Taiwan
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2
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Spicuzza L, Campagna D, Di Maria C, Sciacca E, Mancuso S, Vancheri C, Sambataro G. An update on lateral flow immunoassay for the rapid detection of SARS-CoV-2 antibodies. AIMS Microbiol 2023; 9:375-401. [PMID: 37091823 PMCID: PMC10113162 DOI: 10.3934/microbiol.2023020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 03/31/2023] [Accepted: 04/04/2023] [Indexed: 04/25/2023] Open
Abstract
Over the last three years, after the outbreak of the COVID-19 pandemic, an unprecedented number of novel diagnostic tests have been developed. Assays to evaluate the immune response to SARS-CoV-2 have been widely considered as part of the control strategy. The lateral flow immunoassay (LFIA), to detect both IgM and IgG against SARS-CoV-2, has been widely studied as a point-of-care (POC) test. Compared to laboratory tests, LFIAs are faster, cheaper and user-friendly, thus available also in areas with low economic resources. Soon after the onset of the pandemic, numerous kits for rapid antibody detection were put on the market with an emergency use authorization. However, since then, scientists have tried to better define the accuracy of these tests and their usefulness in different contexts. In fact, while during the first phase of the pandemic LFIAs for antibody detection were auxiliary to molecular tests for the diagnosis of COVID-19, successively these tests became a tool of seroprevalence surveillance to address infection control policies. When in 2021 a massive vaccination campaign was implemented worldwide, the interest in LFIA reemerged due to the need to establish the extent and the longevity of immunization in the vaccinated population and to establish priorities to guide health policies in low-income countries with limited access to vaccines. Here, we summarize the accuracy, the advantages and limits of LFIAs as POC tests for antibody detection, highlighting the efforts that have been made to improve this technology over the last few years.
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Affiliation(s)
- Lucia Spicuzza
- Department of Clinical and Experimental Medicine, University of Catania, Catania, Italy
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3
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Das D, Singh T, Ahmed I, Masetty M, Priye A. Effects of Relative Humidity and Paper Geometry on the Imbibition Dynamics and Reactions in Lateral Flow Assays. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:9863-9873. [PMID: 35913402 DOI: 10.1021/acs.langmuir.2c01017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Lateral flow assays and paper microfluidics have the potential to replace benchtop instrumented medical diagnostic systems with instrument-free systems that rely on passive transport of liquid through micro-porous paper substrates. Predicting the imbibition dynamics of liquid through dry paper substrates is mostly modeled through the Lucas-Washburn (LW) equations. However, the LW framework assumes that the fluid front exhibits a sharp boundary between the dry and wet phases across the liquid imbibition interface. Additionally, the relative humidity in the environment results in moisture trapped within the pores of the paper substrates as the paper attains an equilibrium with the ambient air. Here, we apply a two-phase transport framework based on Brooks and Corey's model to capture imbibition dynamics on partially saturated paper substrates. The model is experimentally validated and is then used to predict the liquid-paper imbibition dynamics in simulated environments with 1-70% relative humidity. The model was also used to determine the saturation gradient of liquid along the imbibition interface of the paper substrate. Insights from these studies enabled us to determine the mechanism of the liquid transport in partially saturated porous paper substrates. The model also enabled us to evaluate the optimal paper shapes and relative humidity of the environment that maximize imbibition rates and minimize imbibition front broadening. Finally, we evaluate the effect of moisture content of paper on the rate of paper-based biochemical reaction by amplifying a sequence of the SARS-CoV-2 RNA target via reverse transcriptase loop-mediated isothermal amplification. Taken together, this study provides some important guidelines to academic and applied researchers working in point-of-care diagnostics to develop paper-based testing platforms that are capable of functioning in a robust manner across multiple environmental conditions.
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Affiliation(s)
- Debayan Das
- Department of Chemical Engineering, Shiv Nadar University, Uttar Pradesh 201314, India
| | - Tarun Singh
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Isteaque Ahmed
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Manaswini Masetty
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Aashish Priye
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, Ohio 45221, United States
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4
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Hui YY, Tang Y, Azuma T, Lin H, Liao F, Chen Q, Kuo J, Wang Y, Chang H. Design and implementation of a low‐cost portable reader for thermometric lateral flow immunoassay. J CHIN CHEM SOC-TAIP 2022. [DOI: 10.1002/jccs.202200124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yuen Yung Hui
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
| | - Yi‐Xiu Tang
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
| | - Terumitsu Azuma
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
- Department of Physics National Taiwan University Taipei Taiwan
| | - Hsin‐Hung Lin
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
| | - Fang‐Zhen Liao
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
| | - Qing‐Ying Chen
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan
| | - Jen‐Hwa Kuo
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
- Institute of Brain Sciences National Yang Ming Chiao Tung University Taipei Taiwan
| | - Yuh‐Lin Wang
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
- Department of Physics National Taiwan University Taipei Taiwan
| | - Huan‐Cheng Chang
- Institute of Atomic and Molecular Sciences Academia Sinica Taipei Taiwan
- Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan
- Department of Chemistry National Taiwan Normal University Taipei Taiwan
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5
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Pinheiro T, Cardoso AR, Sousa CEA, Marques AC, Tavares APM, Matos AM, Cruz MT, Moreira FTC, Martins R, Fortunato E, Sales MGF. Paper-Based Biosensors for COVID-19: A Review of Innovative Tools for Controlling the Pandemic. ACS OMEGA 2021; 6:29268-29290. [PMID: 34778604 PMCID: PMC8577188 DOI: 10.1021/acsomega.1c04012] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 10/18/2021] [Indexed: 05/07/2023]
Abstract
The appearance and quick spread of the new severe acute respiratory syndrome coronavirus disease, COVID-19, brought major societal challenges. Importantly, suitable medical diagnosis procedures and smooth clinical management of the disease are an emergent need, which must be anchored on novel diagnostic methods and devices. Novel molecular diagnostic tools relying on nucleic acid amplification testing have emerged globally and are the current gold standard in COVID-19 diagnosis. However, the need for widespread testing methodologies for fast, effective testing in multiple epidemiological scenarios remains a crucial step in the fight against the COVID-19 pandemic. Biosensors have previously shown the potential for cost-effective and accessible diagnostics, finding applications in settings where conventional, laboratorial techniques may not be readily employed. Paper- and cellulose-based biosensors can be particularly relevant in pandemic times, for the renewability, possibility of mass production with sustainable methodologies, and safe environmental disposal. In this review, paper-based devices and platforms targeting SARS-CoV-2 are showcased and discussed, as a means to achieve quick and low-cost PoC diagnosis, including detection methodologies for viral genomic material, viral antigen detection, and serological antibody testing. Devices targeting inflammatory markers relevant for COVID-19 are also discussed, as fast, reliable bedside diagnostic tools for patient treatment and follow-up.
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Affiliation(s)
- Tomás Pinheiro
- CENIMAT
i3N, Materials Science Department, Faculty of Science and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica 2829-516, Portugal
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
| | - A. Rita Cardoso
- CENIMAT
i3N, Materials Science Department, Faculty of Science and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica 2829-516, Portugal
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
- BioMark@ISEP,
School of Engineering, Polytechnic Institute
of Porto, R. Dr. António
Bernardino de Almeida, 431, Porto 4249-015, Portugal
- CEB,
Centre of Biological Engineering, University
of Minho, Braga 4710-057, Portugal
| | - Cristina E. A. Sousa
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
- BioMark@ISEP,
School of Engineering, Polytechnic Institute
of Porto, R. Dr. António
Bernardino de Almeida, 431, Porto 4249-015, Portugal
| | - Ana C. Marques
- CENIMAT
i3N, Materials Science Department, Faculty of Science and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica 2829-516, Portugal
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
| | - Ana P. M. Tavares
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
- BioMark@ISEP,
School of Engineering, Polytechnic Institute
of Porto, R. Dr. António
Bernardino de Almeida, 431, Porto 4249-015, Portugal
- CEB,
Centre of Biological Engineering, University
of Minho, Braga 4710-057, Portugal
| | - Ana Miguel Matos
- Faculty
of Pharmacy, University of Coimbra, Pólo das Ciências
da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
- Chemical
Engineering Processes and Forest Products Research Center, Coimbra 3000-548, Portugal
| | - Maria Teresa Cruz
- Faculty
of Medicine, Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, Polo I, 1st Floor, Coimbra 3004-504, Portugal
| | - Felismina T. C. Moreira
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
- BioMark@ISEP,
School of Engineering, Polytechnic Institute
of Porto, R. Dr. António
Bernardino de Almeida, 431, Porto 4249-015, Portugal
| | - Rodrigo Martins
- CENIMAT
i3N, Materials Science Department, Faculty of Science and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica 2829-516, Portugal
| | - Elvira Fortunato
- CENIMAT
i3N, Materials Science Department, Faculty of Science and Technology, Universidade NOVA de Lisboa and CEMOP/UNINOVA, Caparica 2829-516, Portugal
| | - M. Goreti F. Sales
- BioMark@UC,
Faculty of Sciences and Technology, University
of Coimbra R. Sílvio Lima, Pólo II, 3030-790 Coimbra, Portugal
- BioMark@ISEP,
School of Engineering, Polytechnic Institute
of Porto, R. Dr. António
Bernardino de Almeida, 431, Porto 4249-015, Portugal
- CEB,
Centre of Biological Engineering, University
of Minho, Braga 4710-057, Portugal
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6
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Liu G, Jiang C, Lin X, Yang Y. Point-of-care detection of cytokines in cytokine storm management and beyond: Significance and challenges. VIEW 2021; 2:20210003. [PMID: 34766163 PMCID: PMC8242812 DOI: 10.1002/viw.20210003] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/01/2021] [Accepted: 03/08/2021] [Indexed: 12/16/2022] Open
Abstract
Cytokines are signaling molecules between cells in immune system. Cytokine storm, due to the sudden acute increase in levels of pro‐inflammatory circulating cytokines, can result in disease severity and major‐organ damage. Thus, there is urgent need to develop rapid, sensitive, and specific methods for monitoring of cytokines in biology and medicine. Undoubtedly, point‐of‐care testing (POCT) will provide clinical significance in disease early diagnosis, management, and prevention. This review aims to summarize and discuss the latest technologies for detection of cytokines with a focus on POCT. The overview of diseases resulting from imbalanced cytokine levels, such as COVID‐19, sepsis and other cytokine release syndromes are presented. The clinical cut‐off levels of cytokine as biomarkers for different diseases are summarized. The challenges and perspectives on the development of cytokine POCT devices are also proposed and discussed. Cytokine POCT devices are expected to be the ongoing spotlight of disease management and prevention during COVID‐19 pandemic and also the post COVID‐19 pandemic era.
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Affiliation(s)
- Guozhen Liu
- School of Life and Health Sciences The Chinese University of Hong Kong Shenzhen 518172 P.R. China.,Graduate School of Biomedical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Cheng Jiang
- Nuffield Department of Clinical Neurosciences John Radcliffe Hospital University of Oxford Oxford OX3 9DU United Kingdom
| | - Xiaoting Lin
- Graduate School of Biomedical Engineering University of New South Wales Sydney NSW 2052 Australia
| | - Yang Yang
- School of Life and Health Sciences The Chinese University of Hong Kong Shenzhen 518172 P.R. China
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7
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Shirshahi V, Liu G. Enhancing the analytical performance of paper lateral flow assays: From chemistry to engineering. Trends Analyt Chem 2021. [DOI: 10.1016/j.trac.2021.116200] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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8
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Garg M, Sharma AL, Singh S. Advancement in biosensors for inflammatory biomarkers of SARS-CoV-2 during 2019-2020. Biosens Bioelectron 2021; 171:112703. [PMID: 33049563 PMCID: PMC7544635 DOI: 10.1016/j.bios.2020.112703] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 10/03/2020] [Accepted: 10/06/2020] [Indexed: 01/08/2023]
Abstract
COVID-19 pandemic has affected everyone throughout the world and has resulted in the loss of lives of many souls. Due to the restless efforts of the researchers working hard day and night, some success has been gained for the detection of virus. As on date, the traditional polymerized chain reactions (PCR), lateral flow devices (LFID) and enzyme linked immunosorbent assays (ELISA) are being adapted for the detection of this deadly virus. However, a more exciting avenue is the detection of certain biomarkers associated with this viral infection which can be done by simply re-purposing our existing infrastructure. SARS-CoV-2 viral infection triggers various inflammatory, biochemical and hematological biomarkers. Because of the infection route that the virus follows, it causes significant inflammatory response. As a result, various inflammatory markers have been reported to be closely associated with this infection such as C-reactive proteins, interleukin-6, procalcitonin and ferritin. Sensing of these biomarkers can simultaneously help in understanding the illness level of the affected patient. Also, by monitoring these biomarkers, we can predict the viral infections in those patients who have low SARS-CoV-2 RNA and hence are missed by traditional tests. This can give more targets to the researchers and scientists, working in the area of drug development and provide better prognosis. In this review, we propose to highlight the conventional as well as the non-conventional methods for the detection of these inflammatory biomarkers which can act as a single platform of knowledge for the researchers and scientists working for the treatment of COVID-19.
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Affiliation(s)
- Mayank Garg
- CSIR- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh, 160030, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Amit L Sharma
- CSIR- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh, 160030, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
| | - Suman Singh
- CSIR- Central Scientific Instruments Organisation, Sector 30-C, Chandigarh, 160030, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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9
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Ross GMS, Filippini D, Nielen MWF, Salentijn GI. Unraveling the Hook Effect: A Comprehensive Study of High Antigen Concentration Effects in Sandwich Lateral Flow Immunoassays. Anal Chem 2020; 92:15587-15595. [PMID: 33185097 PMCID: PMC7711776 DOI: 10.1021/acs.analchem.0c03740] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sandwich lateral flow immunoassays (LFIAs) are limited at high antigen concentrations by the hook effect, leading to a contradictory decrease in the test line (T) intensity and false-negative results. The hook effect is mainly associated with the loss of T, and research focuses on minimizing this effect. Nevertheless, the control line (C) intensity is also affected at higher analyte concentrations, undesirably influencing the T/C ratio in LFIA readers. The main aim of this work is to identify and understand these high antigen concentration effects in order to develop ubiquitous strategies to interpret and mitigate such effects. Four complementary experiments were performed: performance assessment of three different allergen LFIAs (two for hazelnut, one for peanut) over 0.075-3500 ppm, LFIAs with C only, surface plasmon resonance (SPR) binding experiments on the immobilized control antibody, and smartphone video recording of LFIAs during their development. As antigen concentrations increase, the C signal decreases before the T signal does, suggesting that distinct mechanisms underlie these intensity reductions. Reduced binding at the C occurred even in the absence of T, so the upfront T does not explain the loss of C. SPR confirmed that the C antibody favors binding with free labeled antibody compared with a labeled antibody-analyte complex, indicating that in antigen excess, binding is reduced at C before T. Finally, a smartphone-based video method was developed for dynamically monitoring the LFIA development in real time to distinguish between different concentration-dependent effects. Digitally analyzing the data allows clear differentiation of highly positive samples and false-negative samples and can indicate whether the LFIA is in the dynamic working range or at critically high concentrations. The aim of this work is to identify and understand such high antigen concentration effects in order to develop ubiquitous strategies to interpret and mitigate such effects.
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Affiliation(s)
- Georgina M S Ross
- Wageningen Food Safety Research (WFSR), Wageningen University & Research, P.O. Box 230, Wageningen 6700 AE, The Netherlands
| | - Daniel Filippini
- Optical Devices Laboratory, Division of Sensor and Actuator Systems, IFM-Linköping University, Linköping S58183, Sweden
| | - Michel W F Nielen
- Wageningen Food Safety Research (WFSR), Wageningen University & Research, P.O. Box 230, Wageningen 6700 AE, The Netherlands.,Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen 6708 WE, The Netherlands
| | - Gert Ij Salentijn
- Wageningen Food Safety Research (WFSR), Wageningen University & Research, P.O. Box 230, Wageningen 6700 AE, The Netherlands.,Laboratory of Organic Chemistry, Wageningen University, Stippeneng 4, Wageningen 6708 WE, The Netherlands
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10
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Han GR, Koo HJ, Ki H, Kim MG. Paper/Soluble Polymer Hybrid-Based Lateral Flow Biosensing Platform for High-Performance Point-of-Care Testing. ACS APPLIED MATERIALS & INTERFACES 2020; 12:34564-34575. [PMID: 32666783 DOI: 10.1021/acsami.0c07893] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
As a global shift continues to occur in high burden diseases toward developing countries, the importance of medical diagnostics based on point-of-care testing (POCT) is rapidly increasing. However, most diagnostic tests that meet clinical standards rely on high-end analyzers in central hospitals. Here, we report the development of a simple, low-cost, mass-producible, highly sensitive/quantitative, automated, and robust paper/soluble polymer hybrid-based lateral flow biosensing platform, paired with a smartphone-based reader, for high-performance POCT. The testing architecture incorporates a polymeric barrier that programs/automates sequential reactions via a polymer dissolving mechanism. The smartphone-based reader with simple opto-mechanical parts offers a stable framework for accurate quantification. Analytical performance of this platform was evaluated by testing human cardiac troponin I (cTnI), a preferred biomarker for the diagnosis of myocardial infarction, in serum/plasma samples. Coupled with catalytic/colorimetric gold-ion amplification, this platform produced results within 20 min with a detection limit of 0.92 pg mL-1 and a coefficient of variation <10%, which is equivalent to the performance of a high-sensitivity standard analyzer, and operated within acceptable levels stipulated by clinical guidelines. Moreover, cTnI clinical sample tests indicate a high correlation (r = 0.981) with the contemporary analyzers, demonstrating the clinical utility of this platform in high-performance POCT.
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Affiliation(s)
- Gyeo-Re Han
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Hee Joon Koo
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Hangil Ki
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Min-Gon Kim
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea
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11
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Lim H, Jafry AT, Lee J. Fabrication, Flow Control, and Applications of Microfluidic Paper-Based Analytical Devices. Molecules 2019; 24:E2869. [PMID: 31394856 PMCID: PMC6721703 DOI: 10.3390/molecules24162869] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 11/20/2022] Open
Abstract
Paper-based microfluidic devices have advanced significantly in recent years as they are affordable, automated with capillary action, portable, and biodegradable diagnostic platforms for a variety of health, environmental, and food quality applications. In terms of commercialization, however, paper-based microfluidics still have to overcome significant challenges to become an authentic point-of-care testing format with the advanced capabilities of analyte purification, multiplex analysis, quantification, and detection with high sensitivity and selectivity. Moreover, fluid flow manipulation for multistep integration, which involves valving and flow velocity control, is also a critical parameter to achieve high-performance devices. Considering these limitations, the aim of this review is to (i) comprehensively analyze the fabrication techniques of microfluidic paper-based analytical devices, (ii) provide a theoretical background and various methods for fluid flow manipulation, and iii) highlight the recent detection techniques developed for various applications, including their advantages and disadvantages.
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Affiliation(s)
- Hosub Lim
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea
| | - Ali Turab Jafry
- Faculty of Mechanical Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi 23640, Pakistan.
| | - Jinkee Lee
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea.
- Institute of Quantum Biophysics, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Korea.
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12
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Meng L, Turner APF, Mak WC. Soft and flexible material-based affinity sensors. Biotechnol Adv 2019; 39:107398. [PMID: 31071431 DOI: 10.1016/j.biotechadv.2019.05.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Revised: 05/01/2019] [Accepted: 05/04/2019] [Indexed: 01/11/2023]
Abstract
Recent advances in biosensors and point-of-care (PoC) devices are poised to change and expand the delivery of diagnostics from conventional lateral-flow assays and test strips that dominate the market currently, to newly emerging wearable and implantable devices that can provide continuous monitoring. Soft and flexible materials are playing a key role in propelling these trends towards real-time and remote health monitoring. Affinity biosensors have the capability to provide for diagnosis and monitoring of cancerous, cardiovascular, infectious and genetic diseases by the detection of biomarkers using affinity interactions. This review tracks the evolution of affinity sensors from conventional lateral-flow test strips to wearable/implantable devices enabled by soft and flexible materials. Initially, we highlight conventional affinity sensors exploiting membrane and paper materials which have been so successfully applied in point-of-care tests, such as lateral-flow immunoassay strips and emerging microfluidic paper-based devices. We then turn our attention to the multifarious polymer designs that provide both the base materials for sensor designs, such as PDMS, and more advanced functionalised materials that are capable of both recognition and transduction, such as conducting and molecularly imprinted polymers. The subsequent content discusses wearable soft and flexible material-based affinity sensors, classified as flexible and skin-mountable, textile materials-based and contact lens-based affinity sensors. In the final sections, we explore the possibilities for implantable/injectable soft and flexible material-based affinity sensors, including hydrogels, microencapsulated sensors and optical fibers. This area is truly a work in progress and we trust that this review will help pull together the many technological streams that are contributing to the field.
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Affiliation(s)
- Lingyin Meng
- Biosensors and Bioelectronics Centre, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden
| | | | - Wing Cheung Mak
- Biosensors and Bioelectronics Centre, Department of Physics, Chemistry and Biology, Linköping University, SE-581 83 Linköping, Sweden.
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