1
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Das D, Lin CW, Chuang HS. On-chip screening of SARS-CoV-2 cDNA by LAMP-integrated rotational diffusometry. Talanta 2024; 267:125253. [PMID: 37776805 DOI: 10.1016/j.talanta.2023.125253] [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: 09/10/2023] [Accepted: 09/26/2023] [Indexed: 10/02/2023]
Abstract
The unprecedented pandemic has raised the demand for prompt, precise, and large-scale virus detection techniques to control the transmission of contagious illnesses. In this study, a loop-mediated isothermal amplification (LAMP) based on-chip platform was developed to address this challenge using rotational diffusometry and functionalized Janus particles. A recombinant plasmid containing a cDNA sequence of the SARS-CoV-2 non-structural protein 2 (nsp2) gene was employed here as a proof-of-concept for COVID-19 detection. Specifically, designed primers and the functionalized Janus particles were simultaneously loaded on a microfluidic chip to perform the LAMP reaction on a hot plate. The optimal Janus particle concentrations for diffusometric analysis were thoroughly validated, and the performance of the on-chip LAMP reaction was assessed using thermal image analysis. Utilization of the highly sensitive rotational diffusometry achieved a limit of detection of 1 pg/μL in just 10 min with a sample volume of 20 μL. Our method delivered a tenfold higher sensitivity than the conventional method by utilizing only half of its usual required time. Overall, this study proposes a potential nucleic acid (NA) amplification device to aid the rapid diagnosis of various diseases by modifying the primers for different target genes.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan; Department of Medical Laboratory Science and Biotechnology, Asia University, Wufeng, Taichung, 413, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan; Medical Device Innovation Center, National Cheng Kung University, Tainan, 701, Taiwan.
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2
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Yun YS, Park DY, Oh IH, Shin WR, Ahn G, Ahn JY, Kim YH. Pathogenic Factors and Recent Study on the Rapid Detection of Shiga Toxin-Producing Escherichia coli (STEC). Mol Biotechnol 2023:10.1007/s12033-023-00985-8. [PMID: 38153662 DOI: 10.1007/s12033-023-00985-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 11/05/2023] [Indexed: 12/29/2023]
Abstract
This comprehensive review delves into the pathogenicity and detection of Shiga Toxin-Producing Escherichia coli (STEC), shedding light on its various genetic and clinical manifestations. STEC originating from E. coli acquires pathogenicity through mobility and genetic elements. The pathogenicity of STEC is explored in terms of clinical progression, complications, and key toxins such as Shiga toxin (Stx). Stx1 and Stx2 are two distinct Stx types exhibiting different toxicities, with Stx2 often associated with severe diseases. This review also delves into Subtilase cytotoxin, an additional cytotoxin produced by some STEC strains. Pathogenic mechanisms of STEC, such as attaching and effacing intestinal lesions, are discussed, with a focus on roles of genetic factors. Plasmids in STEC can confer unique pathogenicity. Hybridization with other pathogenic E. coli can create more lethal pathogens. This review covers a range of detection methods, ranging from DNA amplification to antigen detection techniques, emphasizing the need for innovative approaches to improve the sensitivity and speed of STEC diagnosis. In conclusion, understanding diverse aspects of STEC pathogenicity and exploring enhanced diagnostic methods are critical to addressing this foodborne pathogen effectively. Pathology of Shiga toxin toxicity. STEC-derived Shiga toxin consists of one A subunit and five B subunits. Pathological symptoms of the disease can progress to HUS within two weeks after the onset of diarrhea. Shiga toxin intoxication is also associated with many complications, such as neurological and cardiac complications. This figure was reconstructed based on data from Bruyand et al.
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Affiliation(s)
- Young-Sun Yun
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Dae-Young Park
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - In-Hwan Oh
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Woo-Ri Shin
- Department of Bioengineering, University of Pennsylvania, 210 S 33rd St., Philadelphia, PA, 19104, USA
| | - Gna Ahn
- Center for Ecology and Environmental Toxicology, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Ji-Young Ahn
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea.
| | - Yang-Hoon Kim
- Department of Microbiology, Chungbuk National University, 1 Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea.
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3
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Yang J, Liang Y, Li X, Zhang Y, Qian L, Ke Y, Zhang C. A Spatially Programmable DNA Nanorobot Arm to Modulate Anisotropic Gold Nanoparticle Assembly by Enzymatic Excision. Angew Chem Int Ed Engl 2023; 62:e202308797. [PMID: 37691009 DOI: 10.1002/anie.202308797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
Programmable assembly of gold nanoparticle superstructures with precise spatial arrangement has drawn much attention for their unique characteristics in plasmonics and biomedicine. Bio-inspired methods have already provided programmable, molecular approaches to direct AuNP assemblies using biopolymers. The existing methods, however, predominantly use DNA as scaffolds to directly guide the AuNP interactions to produce intended superstructures. New paradigms for regulating AuNP assembly will greatly enrich the toolbox for DNA-directed AuNP manipulation and fabrication. Here, we developed a strategy of using a spatially programmable enzymatic nanorobot arm to modulate anisotropic DNA surface modifications and assembly of AuNPs. Through spatial controls of the proximity of the reactants, the locations of the modifications were precisely regulated. We demonstrated the control of the modifications on a single 15 nm AuNP, as well as on a rectangular DNA origami platform, to direct unique anisotropic AuNP assemblies. This method adds an alternative enzymatic manipulation to DNA-directed AuNP superstructure assembly.
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Affiliation(s)
- Jing Yang
- School of Computer Science, Key Lab of High Confidence Software Technologies, Peking University, Beijing, 100871, China
- School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China
| | - Yuan Liang
- School of Computer Science, Key Lab of High Confidence Software Technologies, Peking University, Beijing, 100871, China
- School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China
- Center for Quantitative Biology, Peking University, Beijing, 100871, China
| | - Xiang Li
- School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China
| | - Yongpeng Zhang
- School of Control and Computer Engineering, North China Electric Power University, Beijing, 102206, China
| | - Long Qian
- Center for Quantitative Biology, Peking University, Beijing, 100871, China
| | - Yonggang Ke
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Emory University School of Medicine, Atlanta, GA 30322, USA
- Department of Chemistry, Emory University, Atlanta, GA, 30322, USA
| | - Cheng Zhang
- School of Computer Science, Key Lab of High Confidence Software Technologies, Peking University, Beijing, 100871, China
- Center for Quantitative Biology, Peking University, Beijing, 100871, China
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Yuan X, Cao H, Zhang H, Mao G, Wei L. Color-encoded Escherichia coli assay via enzyme-induced etching of Au@MnO 2 nanoparticles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 299:122888. [PMID: 37216818 DOI: 10.1016/j.saa.2023.122888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/12/2023] [Accepted: 05/13/2023] [Indexed: 05/24/2023]
Abstract
Au@MnO2 nanoparticles (NPs), as core-shell nanostructures, have been widely used in ions, molecules and enzyme activities detection due to their stable properties and easy preparation, but their application in bacterial pathogens detection is rarely reported. In this work, Au@MnO2 NPs is employed for Escherichia coli (E. coli) detection through monitoring and measuring β-galactosidase (β-gal) activity based enzyme-induced color-code single particle enumeration (SPE) method. In the existence of E. coli, p-aminophenylβ-D-galactopyranoside (PAPG) can be hydrolyzed to generate p-aminophenol (AP) by the endogenous β-gal of E. coli. MnO2 shell reacts with AP and produces Mn2+, causing the blue shift of the localized surface plasmon resonance (LSPR) peak and color change of the probe from bright yellow to green. With the SPE method, the amount of E. coli can be quantified readily. The detection limit reaches 15 CFU/mL with dynamic range from 100 to 2900 CFU/mL. Besides, this assay is effectively employed to monitor E. coli in river water sample. The designed sensing strategy provides an ultrasensitive and low cost way for E. coli detection and has the possibility to detect other bacteria in environmental monitoring and food quality analysis.
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Affiliation(s)
- Xiang Yuan
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, College of Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Huijuan Cao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, College of Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Huiling Zhang
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, College of Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Guojiang Mao
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, College of Chemical Engineering, Hunan Normal University, Changsha 410081, China
| | - Lin Wei
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research, National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, College of Chemical Engineering, Hunan Normal University, Changsha 410081, China.
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Chen M, Ma E, Xing Y, Xu H, Chen L, Wang Y, Zhang Y, Li J, Wang H, Zheng S. Dual-Modal Lateral Flow Test Strip Assisted by Near-Infrared-Powered Nanomotors for Direct Quantitative Detection of Circulating MicroRNA Biomarkers from Serum. ACS Sens 2023; 8:757-766. [PMID: 36696535 DOI: 10.1021/acssensors.2c02315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Quantification of microRNA (miRNA) has attracted intense interest owing to its importance as a biomarker for the early diagnosis of multiple diseases. However, the inefficient capture of microRNAs from complex biological samples due to the passive diffusion of detection probes essentially restricts their accurate quantification. Herein, we report near-infrared (NIR)-powered Janus nanomotors composed of Au nanorods and periodic mesoporous organo-silica microspheres (AuNR/PMO JNMs) as "swimming probes" to assist a lateral flow test strip (LFTS) for direct, amplification-free, and quantitative miRNA-21 detection in serum and cell medium. The AuNR/PMO JNMs were conjugated with designed hDNA as a recognition probe for miRNA-21. Under NIR irradiation, the exposed AuNRs can generate asymmetric thermal gradients around the JNMs to achieve vigorous self-propelled thermophoretic motion. The active movement significantly accelerated the recognition of miRNA-21 targets, which greatly improved the capture efficiency from 59.39 to 86.12% in the reaction buffer. The enhanced miRNA-21 capture enabled direct quantitative miRNA-21 detection on the LFTS assay with both visual and thermal signals. Under the assistance of AuNR/PMO JNMs, a limit-of-detection of 18 fmol/L for miRNA-21 was achieved, which was 12.22-fold compared to that of LFTS assay with static probes. The constructed LFTS assay was further successfully deployed to directly sense the miRNA-21 in spiked serum samples and MDA-MB-231 medium. Overall, the AuNR/PMO JNM-assisted LFTS system unveils a concrete point-of-care testing strategy for precise miRNA detection in real biological samples, which holds great potential for early diagnosis and treatment of miRNA-related diseases.
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Affiliation(s)
- Minghui Chen
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Enhui Ma
- School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Yujuan Xing
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Hanbo Xu
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Liang Chen
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Yuxin Wang
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Yingying Zhang
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Jingjing Li
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
| | - Hong Wang
- School of Chemical Engineering & Technology, China University of Mining and Technology, Xuzhou 221116, China
| | - Shaohui Zheng
- School of Medical Imaging, Xuzhou Medical University, Xuzhou 221006, China
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Development of Janus Particles as Potential Drug Delivery Systems for Diabetes Treatment and Antimicrobial Applications. Pharmaceutics 2023; 15:pharmaceutics15020423. [PMID: 36839746 PMCID: PMC9967574 DOI: 10.3390/pharmaceutics15020423] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 01/12/2023] [Accepted: 01/24/2023] [Indexed: 02/03/2023] Open
Abstract
Janus particles have emerged as a novel and smart material that could improve pharmaceutical formulation, drug delivery, and theranostics. Janus particles have two distinct compartments that differ in functionality, physicochemical properties, and morphological characteristics, among other conventional particles. Recently, Janus particles have attracted considerable attention as effective particulate drug delivery systems as they can accommodate two opposing pharmaceutical agents that can be engineered at the molecular level to achieve better target affinity, lower drug dosage to achieve a therapeutic effect, and controlled drug release with improved pharmacokinetics and pharmacodynamics. This article discusses the development of Janus particles for tailored and improved delivery of pharmaceutical agents for diabetes treatment and antimicrobial applications. It provides an account of advances in the synthesis of Janus particles from various materials using different approaches. It appraises Janus particles as a promising particulate system with the potential to improve conventional delivery systems, providing a better loading capacity and targeting specificity whilst promoting multi-drugs loading and single-dose-drug administration.
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Wang J, Cao Y, Li Z, Dong M, Dou W, Xu X, He S. Bridge-DNA synthesis triggered by an allosteric aptamer for the colorimetric detection of pathogenic bacteria. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:275-283. [PMID: 36594811 DOI: 10.1039/d2ay01844f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Rapid and sensitive quantification of pathogenic bacteria is highly desired for environmental health supervision and food safety control. Yet, the amplification and detection of bacteria with a concentration lower than 102 cfu mL-1 remains a great challenge. Here, we combined an allosteric aptamer (AAP) with a gold nanoparticle (AuNP) for assembling a bridge-DNA synthesis system (named as AuNP-BDS) to amplify the bacterial signals. The AAP and its paired primer (PP) were covalently linked to two different AuNPs, respectively: one named as AAP-AuNP and the other PP-AuNP. Upon recognition of the antigen from the pathogenic bacteria, AAP alters its conformation to initiate DNA synthesis on the AuNP surface. The DNA products from AAP-AuNP and PP-AuNP form bridges to each other through base pairing, resulting in the aggregation and colorimetric response of the AuNPs. By using E. coli O157:H7 as an example, the AuNP-BDS could quantify pathogenic bacteria in water with a concentration as low as 10 cfu mL-1 within 60 min and without any enrichment. The colorimetric response values of AuNP-BDS were found to be linearly related to the bacterial concentrations in the range of 10 to 103 cfu mL-1. Good practicability of the AuNP-BDS in quantifying E. coli O157:H7 from tap water, juices, and milks was demonstrated. The AuNP-BDS could be exploited to facilitate the rapid and sensitive quantification of pathogenic bacteria for food safety control.
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Affiliation(s)
- Jingtong Wang
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
| | - Yongqiang Cao
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
| | - Zhao Li
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
| | - Meiling Dong
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
| | - Wei Dou
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
| | - Xiaoping Xu
- College of Chemistry, Fuzhou University, Fuzhou, Fujian, 350108, P. R. China
| | - Shengbin He
- Key Laboratory of Longevity and Aging-related Diseases of Chinese Ministry of Education, Guangxi Colleges and Universities Key Laboratory of Biological Molecular Medicine Research, School of Basic Medical Sciences, Guangxi Medical University, Nanning, Guangxi 530021, P. R. China.
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Das D, Lin CW, Chuang HS. LAMP-Based Point-of-Care Biosensors for Rapid Pathogen Detection. BIOSENSORS 2022; 12:bios12121068. [PMID: 36551035 PMCID: PMC9775414 DOI: 10.3390/bios12121068] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 06/01/2023]
Abstract
Seeking optimized infectious pathogen detection tools is of primary importance to lessen the spread of infections, allowing prompt medical attention for the infected. Among nucleic-acid-based sensing techniques, loop-mediated isothermal amplification is a promising method, as it provides rapid, sensitive, and specific detection of microbial and viral pathogens and has enormous potential to transform current point-of-care molecular diagnostics. In this review, the advances in LAMP-based point-of-care diagnostics assays developed during the past few years for rapid and sensitive detection of infectious pathogens are outlined. The numerous detection methods of LAMP-based biosensors are discussed in an end-point and real-time manner with ideal examples. We also summarize the trends in LAMP-on-a-chip modalities, such as classical microfluidic, paper-based, and digital LAMP, with their merits and limitations. Finally, we provide our opinion on the future improvement of on-chip LAMP methods. This review serves as an overview of recent breakthroughs in the LAMP approach and their potential for use in the diagnosis of existing and emerging diseases.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 404, Taiwan
- Department of Medical Laboratory Science and Biotechnology, Asia University, Wufeng, Taichung 413, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan
- Medical Device Innovation Center, National Cheng Kung University, Tainan 701, Taiwan
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Wang Y, Zhao P, Zhang S, Zhu K, Shangguan X, Liu L, Zhang S. Application of Janus Particles in Point-of-Care Testing. BIOSENSORS 2022; 12:bios12090689. [PMID: 36140074 PMCID: PMC9496037 DOI: 10.3390/bios12090689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 08/20/2022] [Accepted: 08/22/2022] [Indexed: 06/01/2023]
Abstract
Janus particles (JPs), named after the two-faced Roman god, are asymmetric particles with different chemical properties or polarities. JPs have been widely used in the biomedical field in recent years, including as drug carriers for targeted controlled drug release and as biosensors for biological imaging and biomarker detection, which is crucial in the early detection and treatment of diseases. In this review, we highlight the most recent advancements made with regard to Janus particles in point-of-care testing (POCT). Firstly, we introduce several commonly used methods for preparing Janus particles. Secondly, we present biomarker detection using JPs based on various detection methods to achieve the goal of POCT. Finally, we discuss the challenges and opportunities for developing Janus particles in POCT. This review will facilitate the development of POCT biosensing devices based on the unique properties of Janus particles.
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Das D, Lin CW, Kwon JS, Chuang HS. Rotational diffusometric sensor with isothermal amplification for ultra-sensitive and rapid detection of SARS-CoV-2 nsp2 cDNA. Biosens Bioelectron 2022; 210:114293. [PMID: 35477152 PMCID: PMC9020650 DOI: 10.1016/j.bios.2022.114293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/08/2022] [Accepted: 04/15/2022] [Indexed: 11/24/2022]
Abstract
In the wake of a pandemic, the development of rapid, simple, and accurate molecular diagnostic tests can significantly aid in reducing the spread of infections. By combining particle imaging with molecular assays, a quick and highly sensitive biosensor can readily identify a pathogen at low concentrations. Here, we implement functionalized particle-enabled rotational diffusometry in combination with loop-mediated isothermal amplification for the rapid detection of the SARS-CoV-2 nsp2 gene in the recombinant plasmid as a proof of concept for COVID-19 diagnostics. By analyzing the images of blinking signals generated by these modified particles, the change in micro-level viscosity due to nucleic acid amplification was measured. The high sensitivity of rotational diffusometry enabled facile detection within 10 min, with a limit of detection of 70 ag/μL and a sample volume of 2 μL. Tenfold higher detection sensitivity was observed for rotational diffusometry in comparison with real-time PCR. In addition, the system stability and the effect of temperature on rotational diffusometric measurements were studied and reported. These results demonstrated the utility of a rotational diffusometric platform for the rapid and sensitive detection of SARS-CoV-2 cDNA fragments.
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Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung, Taiwan; Department of Medical Laboratory Science and Biotechnology, Asia University, Wufeng, Taichung 413, Taiwan
| | - Jae-Sung Kwon
- Department of Mechanical Engineering, Incheon National University, Incheon, Republic of Korea.
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan, 701, Taiwan; Medical Device Innovation Center, National Cheng Kung University, Tainan, 701, Taiwan; Core Facility Center, National Cheng Kung University, Tainan, 701, Taiwan.
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11
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Palladium-platinum bimetallic nanomaterials and their application in Staphylococcus aureus detection on paper-based devices. Biosens Bioelectron 2022; 216:114669. [DOI: 10.1016/j.bios.2022.114669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 11/22/2022]
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12
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Yu Q, Chen X, Qi L, Yang H, Wang Y, Zhang M, Huang K, Yuan X. Smartphone readable colorimetry and ICP-MS dual-mode sensing platform for ultrasensitive and label-free detection of Escherichia coli based on filter-assisted separation. Talanta 2022; 251:123760. [DOI: 10.1016/j.talanta.2022.123760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 10/16/2022]
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13
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Das D, Hsieh HC, Chen CS, Chen WL, Chuang HS. Ultrafast and Sensitive Screening of Pathogens by Functionalized Janus Microbeads‐Enabled Rotational Diffusometry in Combination with Isothermal Amplification. SMALL SCIENCE 2022. [DOI: 10.1002/smsc.202200010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Dhrubajyoti Das
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
| | - Hui-Chen Hsieh
- Department of Biochemistry and Molecular Biology National Cheng Kung University Tainan city 70101 Taiwan
- Institute of Basic Medical Sciences College of Medicine National Cheng Kung University Tainan city 70101 Taiwan
| | - Chang-Shi Chen
- Department of Biochemistry and Molecular Biology National Cheng Kung University Tainan city 70101 Taiwan
- Institute of Basic Medical Sciences College of Medicine National Cheng Kung University Tainan city 70101 Taiwan
| | - Wei-Long Chen
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering National Cheng Kung University Tainan city 70101 Taiwan
- Medical Device Innovation Center National Cheng Kung University Tainan city 70101 Taiwan
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