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Gao F, Ye S, Huang L, Gu Z. A nanoparticle-assisted signal-enhancement technique for lateral flow immunoassays. J Mater Chem B 2024; 12:6735-6756. [PMID: 38920348 DOI: 10.1039/d4tb00865k] [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: 06/27/2024]
Abstract
Lateral flow immunoassay (LFIA), an affordable and rapid paper-based detection technology, is employed extensively in clinical diagnosis, environmental monitoring, and food safety analysis. The COVID-19 pandemic underscored the validity and adoption of LFIA in performing large-scale clinical and public health testing. The unprecedented demand for prompt diagnostic responses and advances in nanotechnology have fueled the rise of next-generation LFIA technologies. The utilization of nanoparticles to amplify signals represents an innovative approach aimed at augmenting LFIA sensitivity. This review probes the nanoparticle-assisted amplification strategies in LFIA applications to secure low detection limits and expedited response rates. Emphasis is placed on comprehending the correlation between the physicochemical properties of nanoparticles and LFIA performance. Lastly, we shed light on the challenges and opportunities in this prolific field.
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Affiliation(s)
- Fang Gao
- Institute of Energy Materials Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Shaonian Ye
- Institute of Energy Materials Science, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China
| | - Lin Huang
- Department of Clinical Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
- Shanghai Institute of Thoracic Oncology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
| | - Zhengying Gu
- Department of Clinical Laboratory Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China.
- Shanghai Institute of Thoracic Oncology, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030, China
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2
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Pei J, Jin Y, Ren C, Chen Y, Zou M, Qi X. Detection of carbofuran in fruits and vegetables by Raman spectroscopy combined with immunochromatography. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:3938-3948. [PMID: 38842108 DOI: 10.1039/d4ay00490f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2024]
Abstract
It has long been desired to develop rapid methods for the rapid identification and quantification of pesticides and their metabolites. Carbofuran, a representative pesticide of the carbamate group, is highly systemic and is used on vegetables, fruits and grains, which has led many countries to test for residues in food and the environment. In this study, gold and silver composite core-shell (Au@Ag) nanoparticles were used to label the carbofuran antibody and Raman molecule 5,5-dithiobis-2-nitrobenzoic acid (DTNB) to synthesize Raman immune probes. The signal value of DTNB was read using a Raman spectrometer, and the quantitative detection technology of carbofuran was established based on lateral flow immunochromatographic assay (ICA) combined with surface-enhanced Raman spectroscopy (SERS). SERS-ICA is a rapid, quantitative and ultrasensitive test for the determination of carbofuran in fruits and vegetables with a sensitivity of 0.1 pg mL-1. Consequently, the results demonstrate that the SERS-based lateral flow immunosensor developed in this study has the advantages of excellent assay sensitivity and remarkable multiplexing capability, and thus it will have great application potential in food safety monitoring.
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Affiliation(s)
- Jiahuan Pei
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
- School of Chemistry and Life Sciences, Beijing University of Technology, Beijing 100124, China
| | - Yong Jin
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
| | - Chunsheng Ren
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
| | - Yan Chen
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
| | - Mingqiang Zou
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
| | - Xiaohua Qi
- Chinese Academy of Inspection and Quarantine (CAIQ), No. A3, Gaobeidian Road, Chaoyang District, Beijing 100123, China.
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3
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Lu X, Lu W, Hua D. A novel SERS-lateral flow assay (LFA) tray for monitoring of miR-155-5p during pyroptosis in breast cancer cells. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:3878-3894. [PMID: 38828902 DOI: 10.1039/d4ay00363b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2024]
Abstract
In the study, a novel surface-enhanced Raman scattering (SERS)-lateral flow assay (LFA) tray for the real-time detection of pyroptosis-associated miR-155-5p in breast cancer cells was established and validated. The SERS probe modified with monoclonal antibodies and functionalized HP1@5-FAM was first synthesized. When miR-155-5p was present, HP1@5-FAM on the SERS probe specifically recognized target miRNAs and hybridized with them, resulting in HP2 on the T line only capturing some SERS probes that were not bound to miR-155-5p. The T line appeared as a light orange band or there was no color change, and the corresponding Raman detection result showed a weak or insignificant Raman signal. The SERS probe showed high selectivity, satisfactory stability, and excellent reproducibility, and the limit of detection (LOD) for miR-155-5p was 7.26 aM. Finally, the proposed SERS-LFA tray was applied to detect miR-155-5p in MBA-MD-468 cells that underwent varying degrees of pyroptosis, and the detection results of SERS were consistent with those of the conventional real-time quantitative reverse transcription polymerase chain reaction (qRT-PCR) assay. The study demonstrated that the SERS-LFA tray was a convenient and ultrasensitive method for miR-155-5p real-time detection, which could provide more detailed information for pyroptosis and be of potential value in guiding the treatment of breast cancer.
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Affiliation(s)
- Xiaoxia Lu
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, 214122, China.
- Department of Oncology, The Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou, 225000, China
| | - Wenlong Lu
- Department of Pharmacy and Equipment, Taizhou Women's and Children's Hospital, Taizhou, Jiangsu Province, 225300, China
| | - Dong Hua
- Department of Oncology, The Second Affiliated Hospital of Soochow University, Suzhou, 214122, China.
- Wuxi People's Hospital of Nanjing Medical University, Wuxi, Jiangsu Province, 21411, China
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4
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Plebani M, Nichols JH, Luppa PB, Greene D, Sciacovelli L, Shaw J, Khan AI, Carraro P, Freckmann G, Dimech W, Zaninotto M, Spannagl M, Huggett J, Kost GJ, Trenti T, Padoan A, Thomas A, Banfi G, Lippi G. Point-of-care testing: state-of-the art and perspectives. Clin Chem Lab Med 2024; 0:cclm-2024-0675. [PMID: 38880779 DOI: 10.1515/cclm-2024-0675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Accepted: 06/10/2024] [Indexed: 06/18/2024]
Abstract
Point-of-care testing (POCT) is becoming an increasingly popular way to perform laboratory tests closer to the patient. This option has several recognized advantages, such as accessibility, portability, speed, convenience, ease of use, ever-growing test panels, lower cumulative healthcare costs when used within appropriate clinical pathways, better patient empowerment and engagement, and reduction of certain pre-analytical errors, especially those related to specimen transportation. On the other hand, POCT also poses some limitations and risks, namely the risk of lower accuracy and reliability compared to traditional laboratory tests, quality control and connectivity issues, high dependence on operators (with varying levels of expertise or training), challenges related to patient data management, higher costs per individual test, regulatory and compliance issues such as the need for appropriate validation prior to clinical use (especially for rapid diagnostic tests; RDTs), as well as additional preanalytical sources of error that may remain undetected in this type of testing, which is usually based on whole blood samples (i.e., presence of interfering substances, clotting, hemolysis, etc.). There is no doubt that POCT is a breakthrough innovation in laboratory medicine, but the discussion on its appropriate use requires further debate and initiatives. This collective opinion paper, composed of abstracts of the lectures presented at the two-day expert meeting "Point-Of-Care-Testing: State of the Art and Perspective" (Venice, April 4-5, 2024), aims to provide a thoughtful overview of the state-of-the-art in POCT, its current applications, advantages and potential limitations, as well as some interesting reflections on the future perspectives of this particular field of laboratory medicine.
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Affiliation(s)
- Mario Plebani
- Department of Medicine, University of Padova, Padova, Italy
| | - James H Nichols
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Peter B Luppa
- Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Dina Greene
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Laura Sciacovelli
- Laboratory Medicine Unit, University Hospital of Padova, Padova, Italy
| | - Julie Shaw
- Eastern Ontario Regional Laboratories Association (EORLA), Department of Pathology and Laboratory Medicine, The Ottawa Hospital and University of Ottawa, Ottawa, Canada
| | - Adil I Khan
- Department of Pathology & Laboratory Medicine, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Paolo Carraro
- Department of Laboratory Medicine, Venice Hospital, Venice, Italy
| | - Guido Freckmann
- Institut für Diabetes-Technologie, Forschungs- und Entwicklungsgesellschaft mbH an der Universität Ulm, Ulm, Germany
| | - Wayne Dimech
- National Serology Reference Laboratory, Melbourne, Australia
| | | | - Michael Spannagl
- Institute of Laboratory Medicine, University Hospital, LMU Munich, Munich, Germany
| | - Jim Huggett
- National Measurement Laboratory, LGC, Teddington, UK
| | - Gerald J Kost
- POCT - CTR, Pathology and Laboratory Medicine, School of Medicine, University of California, CA, USA
| | - Tommaso Trenti
- Laboratory Medicine and Pathology Department AUSL e AOU Modena, Modena, Italy
| | - Andrea Padoan
- Department of Medicine, DIMED, University of Padova, Padova, Italy
| | - Annette Thomas
- National PoCT Clinical Lead, National Pathology Programme, NHS Wales Executive, Cardiff, Wales, UK
| | - Giuseppe Banfi
- IRCCS Galeazzi-Sant'Ambrogio and Università Vita e Salute San Raffaele, Milan, Italy
| | - Giuseppe Lippi
- Section of Clinical Biochemistry, University of Verona, Verona, Italy
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Angela S, Fadhilah G, Hsiao WWW, Lin HY, Ko J, Lu SCW, Lee CC, Chang YS, Lin CY, Chang HC, Chiang WH. Nanomaterials in the treatment and diagnosis of rheumatoid arthritis: Advanced approaches. SLAS Technol 2024; 29:100146. [PMID: 38844139 DOI: 10.1016/j.slast.2024.100146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 04/06/2024] [Accepted: 05/22/2024] [Indexed: 06/11/2024]
Abstract
Rheumatoid arthritis (RA), a chronic inflammatory condition that affects persons between the ages of 20 and 40, causes synovium inflammation, cartilage loss, and joint discomfort as some of its symptoms. Diagnostic techniques for RA have traditionally been split into two main categories: imaging and serological tests. However, significant issues are associated with both of these methods. Imaging methods are costly and only helpful in people with obvious symptoms, while serological assays are time-consuming and require specialist knowledge. The drawbacks of these traditional techniques have led to the development of novel diagnostic approaches. The unique properties of nanomaterials make them well-suited as biosensors. Their compact dimensions are frequently cited for their outstanding performance, and their positive impact on the signal-to-noise ratio accounts for their capacity to detect biomarkers at low detection limits, with excellent repeatability and a robust dynamic range. In this review, we discuss the use of nanomaterials in RA theranostics. Scientists have recently synthesized, characterized, and modified nanomaterials and biomarkers commonly used to enhance RA diagnosis and therapy capabilities. We hope to provide scientists with the promising potential that nanomaterials hold for future theranostics and offer suggestions on further improving nanomaterials as biosensors, particularly for detecting autoimmune disorders.
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Affiliation(s)
- Stefanny Angela
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Gianna Fadhilah
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Wesley Wei-Wen Hsiao
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Hsuan-Yi Lin
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - Joshua Ko
- The Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Steven Che-Wei Lu
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Cheng-Chung Lee
- The Ph.D. Program for Translational Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Yu-Sheng Chang
- Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, Shuang Ho Hospital, New Taipei City, Taiwan; Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Ching-Yu Lin
- The Ph.D. Program in Medical Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan; School of Medical Laboratory Science and Biotechnology, College of Medical Science and Technology, Taipei Medical University, Taipei, Taiwan
| | - Huan-Cheng Chang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan; Department of Chemistry, National Taiwan Normal University, Taipei, Taiwan
| | - Wei-Hung Chiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Sustainable Electrochemical Energy Development (SEED) Center, National Taiwan University of Science and Technology, Taipei, Taiwan; Advanced Manufacturing Research Center, National Taiwan University of Science and Technology, Taipei, Taiwan.
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6
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Kongpreecha P, Siri S. A new colorimetric aptasensor for paraquat detection based on the designed aptamer with multiple paraquat binding sites in combination with gold nanoparticles. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:2340-2348. [PMID: 38562104 DOI: 10.1039/d4ay00053f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
The presence of paraquat in the environment poses a danger to human health, leading to a growing demand for an uncomplicated and highly responsive method to detect paraquat. This work reports a new, simple, and sensitive colorimetric aptasensor based on the designed aptamers containing 1-5 paraquat binding sites (R1-R5) in combination with gold nanoparticles (AuNPs). Although the aptamers with more binding sites exhibited greater paraquat interaction capability, the aptasensor based on the R3 aptamer showed the highest detection sensitivity for paraquat in a linear range of 5-50 nM with a limit of detection of 1.29 nM, meaning that it is 2.14 fold more sensitive than the R1-aptasensor. This R3-aptasensor selectively detected paraquat but not the other tested herbicides, including difenzoquat, 2,4-D, ametryn, atrazine, and glufosinate. Also, it efficiently detected paraquat spiked in water samples within the precision acceptance criterion of recovery rates (96.8-105.0%) and the relative standard deviations (1.50-3.81%). These results demonstrated the development of a new aptasensor for paraquat detection, in which the multiple paraquat binding sites of the aptamers could enhance detection sensitivity.
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Affiliation(s)
- Pakawat Kongpreecha
- School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
| | - Sineenat Siri
- School of Biology, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
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Li T, Yang N, Pan X, Zhang X, Xu L. A portable microfluidic photometric detection method based on enzyme linked immunoscatter enhancement. Biosens Bioelectron 2024; 244:115794. [PMID: 37918048 DOI: 10.1016/j.bios.2023.115794] [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: 07/06/2023] [Revised: 10/17/2023] [Accepted: 10/26/2023] [Indexed: 11/04/2023]
Abstract
Currently, the combination of smart phones and microfluidic chips is a commonly used device for point-of-care testing (POCT) detection. Enzyme linked immunosorbent assay (ELISA) is an effective way to detect specific proteins in disease. Because the detection accuracy of smartphone cameras is difficult to directly replace high-precision spectral devices, the combination of smartphones and ELISA has not been widely used. Therefore, this paper proposes a microfluidic photometric detection method based on ELISA scattering enhancement. Firstly, the scattering characteristics of IMB are mined, and the optimal value of absorbance error compensation parameter is obtained. Secondly, the absorbance error compensation model based on scattering enhancement characteristics is established to improve the image acquisition accuracy of smart phones. Finally, the microfluidic photometric detection chip is developed, and the optical path system, optical path adjustment system and POCT detection App of smart phone are designed. The optimal compensation parameters of IMB were obtained based on simulated samples, and the linearity of absorbance and concentration increased by 22.6% after compensation. In the IL-6 sample experiment, the detection results of the platform in this paper had a good linear correlation with IL-6 sample concentration, and the linear correlation coefficient was above 0.95459. At the same time, the detection limit and accuracy meet the detection requirements. Therefore, with the participation of smart phones and microfluidic chips, problems such as difficult carrying and complex operation in traditional ELISA daily detection have been solved, laying a foundation for the future promotion and application of ELISA based POCT platform.
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Affiliation(s)
- Tongge Li
- School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, China
| | - Ning Yang
- School of Electrical and Information Engineering, Jiangsu University, Zhenjiang, China.
| | - Xiaoqing Pan
- Jiangsu Academy of Agricultural Sciences, Nanjing, 210000, China
| | - Xiaodong Zhang
- School of Agricultural Engineering, Jiangsu University, Zhenjiang, China
| | - Lijia Xu
- School of Mechanical and Electrical Engineering, Sichuan Agricultural University, Chengdu, China
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8
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Popov A, Ramanaviciene A. Special Issue "Immunoanalytical and Bioinformatics Methods in Immunology Research". Int J Mol Sci 2024; 25:979. [PMID: 38256053 PMCID: PMC10815663 DOI: 10.3390/ijms25020979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
To effectively control and prevent diseases on a global scale, it is essential to employ precise, sensitive, selective, and rapid immunoanalytical methods [...].
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Affiliation(s)
- Anton Popov
- NanoTechnas—Center of Nanotechnology and Materials Science, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko St. 24, LT-03225 Vilnius, Lithuania;
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, LT-08406 Vilnius, Lithuania
| | - Almira Ramanaviciene
- NanoTechnas—Center of Nanotechnology and Materials Science, Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko St. 24, LT-03225 Vilnius, Lithuania;
- Department of Immunology and Bioelectrochemistry, State Research Institute Centre for Innovative Medicine, LT-08406 Vilnius, Lithuania
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Farka Z, Brandmeier JC, Mickert MJ, Pastucha M, Lacina K, Skládal P, Soukka T, Gorris HH. Nanoparticle-Based Bioaffinity Assays: From the Research Laboratory to the Market. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2307653. [PMID: 38039956 DOI: 10.1002/adma.202307653] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 11/16/2023] [Indexed: 12/03/2023]
Abstract
Advances in the development of new biorecognition elements, nanoparticle-based labels as well as instrumentation have inspired the design of new bioaffinity assays. This review critically discusses the potential of nanoparticles to replace current enzymatic or molecular labels in immunoassays and other bioaffinity assays. Successful implementations of nanoparticles in commercial assays and the need for rapid tests incorporating nanoparticles in different roles such as capture support, signal generation elements, and signal amplification systems are highlighted. The limited number of nanoparticles applied in current commercial assays can be explained by challenges associated with the analysis of real samples (e.g., blood, urine, or nasal swabs) that are difficult to resolve, particularly if the same performance can be achieved more easily by conventional labels. Lateral flow assays that are based on the visual detection of the red-colored line formed by colloidal gold are a notable exception, exemplified by SARS-CoV-2 rapid antigen tests that have moved from initial laboratory testing to widespread market adaption in less than two years.
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Affiliation(s)
- Zdeněk Farka
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Julian C Brandmeier
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
- Institute of Analytical Chemistry, Chemo- and Biosensors, University of Regensburg, Universitätsstr. 31, 93053, Regensburg, Germany
| | | | - Matěj Pastucha
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
- TestLine Clinical Diagnostics, Křižíkova 188, Brno, 612 00, Czech Republic
| | - Karel Lacina
- CEITEC-Central European Institute of Technology, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Petr Skládal
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Tero Soukka
- Department of Life Technologies/Biotechnology, University of Turku, Kiinamyllynkatu 10, Turku, 20520, Finland
| | - Hans H Gorris
- Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
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Nguyen HA, Lee NY. Pipette-Free and Fully Integrated Paper Device Employing DNA Extraction, Isothermal Amplification, and Carmoisine-Based Colorimetric Detection for Determining Infectious Pathogens. SENSORS (BASEL, SWITZERLAND) 2023; 23:9112. [PMID: 38005500 PMCID: PMC10675313 DOI: 10.3390/s23229112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 11/07/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023]
Abstract
A pipette-free and fully integrated device that can be used to accurately recognize the presence of infectious pathogens is an important and useful tool in point-of-care testing, particularly when aiming to decrease the unpredictable threats posed by disease outbreak. In this study, a paper device is developed to integrate the three main processes required for detecting infectious pathogens, including DNA extraction, loop-mediated isothermal amplification (LAMP), and detection. All key reagents, including sodium dodecyl sulfate (SDS), NaOH, LAMP reagents, and carmoisine, are placed on the paper device. The paper device is operated simply via sliding and folding without using any bulky equipment, and the results can be directly observed by the naked eye. The optimized concentrations of sodium dodecyl sulfate (SDS), sodium hydroxide (NaOH), and carmoisine were found to be 0.1%, 0.1 M, and 0.5 mg/mL, respectively. The paper device was used to detect Enterococcus faecium at concentrations as low as 102 CFU/mL within 60 min. Also, E. faecium spiked in milk was successfully detected using the paper device, demonstrating the feasible application in real sample analysis.
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Affiliation(s)
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si 13120, Republic of Korea;
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Moon S. Extending the Shelf-Life of Immunoassay-Based Microfluidic Chips through Freeze-Drying Sublimation Techniques. SENSORS (BASEL, SWITZERLAND) 2023; 23:8524. [PMID: 37896617 PMCID: PMC10610996 DOI: 10.3390/s23208524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023]
Abstract
Point-of-care testing (POCT) platforms utilizing immunoassay-based microfluidic chips offer a robust and specific method for detecting target antibodies, demonstrating a wide range of applications in various medical and research settings. Despite their versatility and specificity, the adoption of these immunoassay chips in POCT has been limited by their short shelf-life in liquid environments, attributed to the degradation of immobilized antibodies. This technical limitation presents a barrier, particularly for resource-limited settings where long-term storage and functionality are critical. To address this challenge, we introduce a novel freeze-dry sublimation process aimed at extending the shelf-life of these microfluidic chips without compromising their functional integrity. This study elaborates on the mechanisms by which freeze-drying preserves the bioactivity of the immobilized antibodies, thereby maintaining the chip's performance over an extended period. Our findings reveal significant shelf-life extension, making it possible for these POCT platforms to be more widely adopted and practically applied, especially in settings with limited resources. This research paves the way for more accessible, long-lasting, and effective POCT solutions, breaking down previous barriers to adoption and application.
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Affiliation(s)
- Sangjun Moon
- Department of Mechanical Convergence Engineering, Gyeongsang National University, Changwon 51391, Gyeongsangnam-do, Republic of Korea; ; Tel.: +82-55-250-7304; Fax: +82-55-250-7399
- Cybernetics Imaging Systems Co., Ltd., Changwon 51391, Gyeongsangnam-do, Republic of Korea
- Department of Mechanical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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12
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Kwon Y, Kim D, Kim S. Quantitative injection strip platform using water-soluble paper and magnet based on a lateral flow assay. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4168-4178. [PMID: 37577848 DOI: 10.1039/d3ay01021j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Quantitative analysis for lateral flow immunoassay (LFA) strips was conducted continuously. Quantitative analysis means measuring concentration, which represents the number of molecules per unit volume. In this study, we designed a quantitative injection (QI) strip by modifying the structure of general LFA strips to inject the same unit volume. To achieve the injection of the same unit volume, we used water-soluble paper and magnet. In addition, the QI strip was fabricated to enable the physical separation of the gold conjugate pad from the nitrocellulose membrane (NC membrane) at the optimized time after sample injection. The optimized time refers to the time from the point at which the sample started flowing on the NC membrane to the point at which the strip was separated. At the samples of same concentration, the LFA strip increases detection signals as the volume of injected sample increases. In contrast to the LFA strip, the QI strip maintained consistent detection signals even with increasing volume of injected sample. Furthermore, the QI strip demonstrated an 11-fold lower deviation compared to the LFA strip. These results are attributed to the separation function of the QI strip. In conclusion, the QI strip is more suitable for quantitative analysis compared to the LFA strip due to the same unit volume without additional equipment such as a pipette. This study is expected to contribute to the development of user-friendly POCT and strip-based quantitative analysis.
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Affiliation(s)
- Yewon Kwon
- Department of Bionanotechnology, Gachon University, Seongnam 13120, Republic of Korea.
| | - Dami Kim
- Philmedi R&D Center, Philmedi Incorporation, 33, Sangimakol-ro, 62beon-gil, Jungwon-gu, Seognam, 13211, Republic of Korea
| | - Sanghyo Kim
- Department of Bionanotechnology, Gachon University, Seongnam 13120, Republic of Korea.
- Philmedi R&D Center, Philmedi Incorporation, 33, Sangimakol-ro, 62beon-gil, Jungwon-gu, Seognam, 13211, Republic of Korea
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