1
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Recent advances in the rapid detection of microRNA with lateral flow assays. Biosens Bioelectron 2022; 211:114345. [DOI: 10.1016/j.bios.2022.114345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/18/2022] [Accepted: 05/03/2022] [Indexed: 12/14/2022]
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2
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Hong D, Jo EJ, Kim K, Song MB, Kim MG. Ru(bpy) 32+ -Loaded Mesoporous Silica Nanoparticles as Electrochemiluminescent Probes of a Lateral Flow Immunosensor for Highly Sensitive and Quantitative Detection of Troponin I. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2004535. [PMID: 33048467 DOI: 10.1002/smll.202004535] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Indexed: 05/14/2023]
Abstract
The lateral flow immunosensor (LFI) is a widely used diagnostic tool for biomarker detection; however, its sensitivity is often insufficient for analyzing targets at low concentrations. Here, an electrochemiluminescent LFI (ECL-LFI) is developed for highly sensitive detection of troponin I (TnI) using Ru(bpy)32+ -loaded mesoporous silica nanoparticles (RMSNs). A large amount of Ru(bpy)32+ is successfully loaded into the mesoporous silica nanoparticles with excellent loading capacity and shows strong ECL signals in reaction to tripropylamine. Antibody-immobilized RMSNs are applied to detect TnI by fluorescence and ECL analysis after a sandwich immunoassay on the ECL-LFI strip. The ECL-LFI enables the highly sensitive detection of TnI-spiked human serum within 20 min at femtomolar levels (≈0.81 pg mL-1 ) and with a wide dynamic range (0.001-100 ng mL-1 ), significantly outperforming conventional fluorescence detection (>3 orders of magnitude). Furthermore, TnI concentrations in 35 clinical serum samples across a low range (0.01-48.31 ng mL-1 ) are successfully quantified with an excellent linear correlation (R2 = 0.9915) using a clinical immunoassay analyzer. These results demonstrate the efficacy of this system as a high-performance sensing strategy capable of capitalizing on future point-of-care testing markets for biomolecule detection.
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Affiliation(s)
- Donggu Hong
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science & Technology (GIST), 123 Cheomdan-gwagiro, Gwangju, 61005, Republic of Korea
| | - Eun-Jung Jo
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science & Technology (GIST), 123 Cheomdan-gwagiro, Gwangju, 61005, Republic of Korea
| | - Kihyeun Kim
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science & Technology (GIST), 123 Cheomdan-gwagiro, Gwangju, 61005, Republic of Korea
| | - Mun-Beom Song
- INGIbio Co. Ltd., R&D Center, Gwangju Institute of Science & Technology (GIST), 206, APRI, 123 Cheomdan-gwagiro, Gwangju, 61005, Republic of Korea
| | - Min-Gon Kim
- Department of Chemistry, School of Physics and Chemistry, Gwangju Institute of Science & Technology (GIST), 123 Cheomdan-gwagiro, Gwangju, 61005, Republic of Korea
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3
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Carbon nanotube-based lateral flow immunoassay for ultrasensitive detection of proteins: application to the determination of IgG. Mikrochim Acta 2019; 186:436. [DOI: 10.1007/s00604-019-3508-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 05/13/2019] [Indexed: 12/20/2022]
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4
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Nishat S, Awan FR, Bajwa SZ. Nanoparticle-based Point of Care Immunoassays for in vitro Biomedical Diagnostics. ANAL SCI 2019; 35:123-131. [PMID: 30224569 DOI: 10.2116/analsci.18r001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In resource-limited settings, the availability of medical practitioners and early diagnostic facilities are inadequate relative to the population size and disease burden. To address cost and delayed time issues in diagnostics, strip-based immunoassays, e.g. dipstick, lateral flow assay (LFA) and microfluidic paper-based analytical devices (microPADs), have emerged as promising alternatives to conventional diagnostic approaches. These assays rely on chromogenic agents to detect disease biomarkers. However, limited specificity and sensitivity have motivated scientists to improve the efficiency of these assays by conjugating chromogenic agents with nanoparticles for enhanced qualitative and quantitative output. Various nanomaterials, which include metallic, magnetic and luminescent nanoparticles, are being used in the fabrication of biosensors to detect and quantify biomolecules and disease biomarkers. This review discusses some of the principles and applications of such nanoparticle-based point of care biosensors in biomedical diagnosis.
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Affiliation(s)
- Sumaira Nishat
- National Institute for Biotechnology and Genetic Engineering (NIBGE).,akistan Institute of Engineering and Applied Sciences (PIEAS).,Department of Computer Science, University of Agriculture
| | - Fazli Rabbi Awan
- National Institute for Biotechnology and Genetic Engineering (NIBGE).,akistan Institute of Engineering and Applied Sciences (PIEAS)
| | - Sadia Zafar Bajwa
- National Institute for Biotechnology and Genetic Engineering (NIBGE).,akistan Institute of Engineering and Applied Sciences (PIEAS)
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5
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A fluorometric lateral flow assay for visual detection of nucleic acids using a digital camera readout. Mikrochim Acta 2018; 185:314. [DOI: 10.1007/s00604-018-2856-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/26/2018] [Indexed: 10/14/2022]
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6
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Li S, Gu Y, Lyu Y, Jiang Y, Liu P. Integrated Graphene Oxide Purification-Lateral Flow Test Strips (iGOP-LFTS) for Direct Detection of PCR Products with Enhanced Sensitivity and Specificity. Anal Chem 2017; 89:12137-12144. [PMID: 29072445 DOI: 10.1021/acs.analchem.7b02769] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An integrated graphene oxide purification-lateral flow test strip (iGOP-LFTS) was developed for on-strip purifying and visually detecting polymerase chain reaction (PCR) products with an improved sensitivity as well as a more stringent specificity. PCR products amplified with a pair of biotin- and digoxin-labeled primers were directly pipetted onto GO pads, on which graphene oxide selectively adsorbed residual primers and primer-dimers with the aid of a running buffer containing MgCl2 and Tween 20. By stacking up three GO pads to increase the surface area for adsorption, 83.4% of double-stranded DNA with a length of 30 bp and 98.6% of 20-nt primers could be removed from a 10-μL DNA mixture. Since no primers interfered with detection, the increase of the sample loading volume from 5 to 20 μL could improve the signal-to-noise ratio of the test line 1.6 fold using the iGOP-LFTS while no changes were observed using the conventional LFTS. The limit of detection of the iGOP-LFTS was determined to be 30 copies of bacteriophage λ-DNA with naked eyes and this limit could be further decreased to 3 copies by loading 20 μL of the sample, which corresponded to a 1000-fold improvement compared to that of the LFTS detected by naked eyes. When the ImageJ analysis was employed, a 100-fold decrease of the detection limit can be obtained. In addition, due to the removal of the primer-dimers, the dim test line observed in the negative control of the LFTS was eliminated using the iGOP-LFTS. A mock clinical specimen spiked with defective HIV-1 (human immunodeficiency virus) viruses was successfully analyzed using a two-step reverse transcription-PCR with 30 amplification cycles followed by the iGOP-LFTS detection. These significant improvements were achieved without introducing any additional hands-on operations and instrumentations.
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Affiliation(s)
- Shanglin Li
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
| | - Yin Gu
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
| | - Yi Lyu
- National HIV/HCV Reference Laboratory, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention , Beijing, 102206, China
| | - Yan Jiang
- National HIV/HCV Reference Laboratory, National Center for AIDS/STD Control and Prevention, Chinese Center for Disease Control and Prevention , Beijing, 102206, China
| | - Peng Liu
- Department of Biomedical Engineering, School of Medicine, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University , Beijing, 100084, China
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7
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A rapid Salmonella detection method involving thermophilic helicase-dependent amplification and a lateral flow assay. Mol Cell Probes 2017; 34:37-44. [DOI: 10.1016/j.mcp.2017.05.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 05/15/2017] [Accepted: 05/15/2017] [Indexed: 11/21/2022]
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8
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Takalkar S, Baryeh K, Liu G. Fluorescent carbon nanoparticle-based lateral flow biosensor for ultrasensitive detection of DNA. Biosens Bioelectron 2017; 98:147-154. [PMID: 28668773 DOI: 10.1016/j.bios.2017.06.045] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/06/2017] [Accepted: 06/21/2017] [Indexed: 01/22/2023]
Abstract
We report a fluorescent carbon nanoparticle (FCN)-based lateral flow biosensor for ultrasensitive detection of DNA. Fluorescent carbon nanoparticle with a diameter of around 15nm was used as a tag to label a detection DNA probe, which was complementary with the part of target DNA. A capture DNA probe was immobilized on the test zone of the lateral flow biosensor. Sandwich-type hybridization reactions among the FCN-labeled DNA probe, target DNA and capture DNA probe were performed on the lateral flow biosensor. In the presence of target DNA, FCNs were captured on the test zone of the biosensor and the fluorescent intensity of the captured FCNs was measured with a portable fluorescent reader. After systematic optimizations of experimental parameters (the components of running buffers, the concentration of detection DNA probe used in the preparation of FCN-DNA conjugates, the amount of FCN-DNA dispensed on the conjugate pad and the dispensing cycles of the capture DNA probes on the test-zone), the biosensor could detect a minimum concentration of 0.4 fM DNA. This study provides a rapid and low-cost approach for DNA detection with high sensitivity, showing great promise for clinical application and biomedical diagnosis.
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Affiliation(s)
- Sunitha Takalkar
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND 58102, USA
| | - Kwaku Baryeh
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND 58102, USA
| | - Guodong Liu
- Department of Chemistry and Biochemistry, North Dakota State University, Fargo, ND 58102, USA.
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9
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Laurentius LB, Owens NA, Park J, Crawford AC, Porter MD. Advantages and limitations of nanoparticle labeling for early diagnosis of infection. Expert Rev Mol Diagn 2016; 16:883-95. [DOI: 10.1080/14737159.2016.1205489] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
| | - Nicholas A. Owens
- The Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
- Department of Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Jooneon Park
- The Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
- Department of Chemical Engineering, University of Utah, Salt Lake City, UT, USA
| | - Alexis C. Crawford
- The Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
- Department of Chemistry, University of Utah, Salt Lake City, UT, USA
| | - Marc D. Porter
- The Nano Institute of Utah, University of Utah, Salt Lake City, UT, USA
- Department of Chemistry, University of Utah, Salt Lake City, UT, USA
- Department of Chemical Engineering, University of Utah, Salt Lake City, UT, USA
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10
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Talbert JN, Alcaine SD, Nugen SR. Engineering bacteriophage for a pragmatic low-resource setting bacterial diagnostic platform. Bioengineered 2016; 7:132-6. [PMID: 27246532 PMCID: PMC4927197 DOI: 10.1080/21655979.2016.1184386] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 10/21/2022] Open
Abstract
Bacteriophages represent multifaceted building blocks that can be incorporated as substitutes for, or in unison with other detection methods, to create powerful new diagnostics for the detection of bacteria. The ease of phage manipulation, production, and detection speed clearly highlights that there remains unrealized opportunities to leverage these phage-based components in diagnostics amenable to resource-limited settings. The passage of regulations like the Food Safety Modernization act, and the ever increasing extent of global trade and travel, will create further demand for these types of diagnostics. While phage-based diagnostics have begun to entering the market place, further research is needed to ensure the potential benefits of phage-based technologies for public health are fully realized. We are just beginning to explore the possibilities that phage-based detection can offer us in the future. The combination of engineered phages as well as engineered enzymes could result in ultrasensitive detection systems for low-resource settings. Because the reporter enzyme is synthesized in vivo, we need to consider the options outside of normal enzyme reporters. In this case, common enzyme issues such as purification and long-term stability are less important. Phage-based diagnostics were conceptualized from out-of-the box thinking and the evolution of these systems should be as well.
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Affiliation(s)
- Joey N. Talbert
- Department of Food Science and Nutrition, Iowa State University, Ames, IA
| | | | - Sam R. Nugen
- Department of Food Science, Cornell University, Ithaca, NY, USA
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
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11
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Alcaine SD, Law K, Ho S, Kinchla AJ, Sela DA, Nugen SR. Bioengineering bacteriophages to enhance the sensitivity of phage amplification-based paper fluidic detection of bacteria. Biosens Bioelectron 2016; 82:14-9. [PMID: 27031186 DOI: 10.1016/j.bios.2016.03.047] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/10/2016] [Accepted: 03/18/2016] [Indexed: 10/22/2022]
Abstract
Bacteriophage (phage) amplification is an attractive method for the detection of bacteria due to a narrow phage-host specificity, short amplification times, and the phages' ability to differentiate between viable and non-viable bacterial cells. The next step in phage-based bacteria detection is leveraging bioengineered phages to create low-cost, rapid, and easy-to-use detection platforms such as lateral flow assays. Our work establishes the proof-of-concept for the use of bioengineered T7 phage strains to increase the sensitivity of phage amplification-based lateral flow assays. We have demonstrated a greater than 10-fold increase in sensitivity using a phage-based protein reporter, maltose-binding protein, over the detection of replicated T7 phage viron itself, and a greater then 100-fold increase in sensitivity using a phage-based enzymatic reporter, alkaline phosphatase. This increase in sensitivity enabled us to detect 10(3)CFU/mL of Escherichia coli in broth after 7h, and by adding a filter concentration step, the ability to detect a regulatory relevant E. coli concentration of 100CFU/100mL in inoculated river water after 9h, where the current standard requires days for results. The combination of the paper fluidic format with phage-based detection provides a platform for the development of novel diagnostics that are sensitive, rapid, and easy to use.
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Affiliation(s)
- S D Alcaine
- Department of Food Science, University of Massachusetts, Amherst, MA, United States
| | - K Law
- Department of Microbiology, University of Massachusetts, Amherst, MA, United States
| | - S Ho
- Department of Microbiology, University of Massachusetts, Amherst, MA, United States
| | - A J Kinchla
- Department of Food Science, University of Massachusetts, Amherst, MA, United States
| | - D A Sela
- Department of Food Science, University of Massachusetts, Amherst, MA, United States; Department of Microbiology, University of Massachusetts, Amherst, MA, United States
| | - S R Nugen
- Department of Food Science, University of Massachusetts, Amherst, MA, United States; Department of Microbiology, University of Massachusetts, Amherst, MA, United States.
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12
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Pihlasalo S, Mariani L, Härmä H. Quantitative and discriminative analysis of nucleic acid samples using luminometric nonspecific nanoparticle methods. NANOSCALE 2016; 8:5902-5911. [PMID: 26912463 DOI: 10.1039/c5nr09252c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Homogeneous simple assays utilizing luminescence quenching and time-resolved luminescence resonance energy transfer (TR-LRET) were developed for the quantification of nucleic acids without sequence information. Nucleic acids prevent the adsorption of a protein to europium nanoparticles which is detected as a luminescence quenching of europium nanoparticles with a soluble quencher or as a decrease of TR-LRET from europium nanoparticles to the acceptor dye. Contrary to the existing methods based on fluorescent dye binding to nucleic acids, equal sensitivities for both single- (ssDNA) and double-stranded DNA (dsDNA) were measured and a detection limit of 60 pg was calculated for the quenching assay. The average coefficient of variation was 5% for the quenching assay and 8% for the TR-LRET assay. The TR-LRET assay was also combined with a nucleic acid dye selective to dsDNA in a single tube assay to measure the total concentration of DNA and the ratio of ssDNA and dsDNA in the mixture. To our knowledge, such a multiplexed assay is not accomplished with commercially available assays.
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Affiliation(s)
- S Pihlasalo
- Laboratory of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, Vatselankatu 2, 20500 Turku, Finland.
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13
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Wang S, Lifson MA, Inci F, Liang LG, Sheng YF, Demirci U. Advances in addressing technical challenges of point-of-care diagnostics in resource-limited settings. Expert Rev Mol Diagn 2016; 16:449-59. [PMID: 26777725 DOI: 10.1586/14737159.2016.1142877] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The striking prevalence of HIV, TB and malaria, as well as outbreaks of emerging infectious diseases, such as influenza A (H7N9), Ebola and MERS, poses great challenges for patient care in resource-limited settings (RLS). However, advanced diagnostic technologies cannot be implemented in RLS largely due to economic constraints. Simple and inexpensive point-of-care (POC) diagnostics, which rely less on environmental context and operator training, have thus been extensively studied to achieve early diagnosis and treatment monitoring in non-laboratory settings. Despite great input from material science, biomedical engineering and nanotechnology for developing POC diagnostics, significant technical challenges are yet to be overcome. Summarized here are the technical challenges associated with POC diagnostics from a RLS perspective and the latest advances in addressing these challenges are reviewed.
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Affiliation(s)
- ShuQi Wang
- a State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases , Hangzhou , China.,c Institute for Translational Medicine , Zhejiang University , Hangzhou , China.,d The Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Department of Radiology , Stanford School of Medicine, Stanford University , Palo Alto , CA , USA
| | - Mark A Lifson
- d The Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Department of Radiology , Stanford School of Medicine, Stanford University , Palo Alto , CA , USA
| | - Fatih Inci
- d The Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Department of Radiology , Stanford School of Medicine, Stanford University , Palo Alto , CA , USA
| | - Li-Guo Liang
- a State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases , Hangzhou , China.,c Institute for Translational Medicine , Zhejiang University , Hangzhou , China
| | - Ye-Feng Sheng
- a State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, First Affiliated Hospital, College of Medicine , Zhejiang University , Hangzhou , China.,b Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases , Hangzhou , China.,c Institute for Translational Medicine , Zhejiang University , Hangzhou , China.,d The Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Department of Radiology , Stanford School of Medicine, Stanford University , Palo Alto , CA , USA
| | - Utkan Demirci
- d The Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Canary Center at Stanford for Cancer Early Detection, Department of Radiology , Stanford School of Medicine, Stanford University , Palo Alto , CA , USA
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14
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Choi JR, Hu J, Tang R, Gong Y, Feng S, Ren H, Wen T, Li X, Wan Abas WAB, Pingguan-Murphy B, Xu F. An integrated paper-based sample-to-answer biosensor for nucleic acid testing at the point of care. LAB ON A CHIP 2016; 16:611-21. [PMID: 26759062 DOI: 10.1039/c5lc01388g] [Citation(s) in RCA: 209] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
With advances in point-of-care testing (POCT), lateral flow assays (LFAs) have been explored for nucleic acid detection. However, biological samples generally contain complex compositions and low amounts of target nucleic acids, and currently require laborious off-chip nucleic acid extraction and amplification processes (e.g., tube-based extraction and polymerase chain reaction (PCR)) prior to detection. To the best of our knowledge, even though the integration of DNA extraction and amplification into a paper-based biosensor has been reported, a combination of LFA with the aforementioned steps for simple colorimetric readout has not yet been demonstrated. Here, we demonstrate for the first time an integrated paper-based biosensor incorporating nucleic acid extraction, amplification and visual detection or quantification using a smartphone. A handheld battery-powered heating device was specially developed for nucleic acid amplification in POC settings, which is coupled with this simple assay for rapid target detection. The biosensor can successfully detect Escherichia coli (as a model analyte) in spiked drinking water, milk, blood, and spinach with a detection limit of as low as 10-1000 CFU mL(-1), and Streptococcus pneumonia in clinical blood samples, highlighting its potential use in medical diagnostics, food safety analysis and environmental monitoring. As compared to the lengthy conventional assay, which requires more than 5 hours for the entire sample-to-answer process, it takes about 1 hour for our integrated biosensor. The integrated biosensor holds great potential for detection of various target analytes for wide applications in the near future.
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Affiliation(s)
- Jane Ru Choi
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China. and Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - Jie Hu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China. and Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Ruihua Tang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China. and Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yan Gong
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China. and Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Shangsheng Feng
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China and MOE Key Laboratory of Multifunctional Materials and Structures (LMMS), School of Aerospace, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Hui Ren
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China and Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, PR China
| | - Ting Wen
- Xi'an Diandi Biotech Company, Xi'an 710049, PR China
| | - XiuJun Li
- Department of Chemistry, College of Health Sciences; Biomedical Engineering; & Border Biomedical Research Center, University of Texas at El Paso, El Paso, Texas 79968, USA
| | - Wan Abu Bakar Wan Abas
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - Belinda Pingguan-Murphy
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia.
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, PR China. and Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
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15
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Pöhlmann C, Dieser I, Sprinzl M. A lateral flow assay for identification of Escherichia coli by ribosomal RNA hybridisation. Analyst 2014; 139:1063-71. [PMID: 24443718 DOI: 10.1039/c3an02059b] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Existing technologies for analysis of microbiological contaminants in food or clinical samples are often expensive and require laboratory settings and trained personnel. Here we present a lateral flow assay employing gold nanoparticle-oligodeoxynucleotide conjugates and four-component sandwich hybridisation for direct detection of specific sequences in bacterial 16S ribosomal RNA. Combined with rapid "one step" lysis the developed procedure allows detection of 5 × 10(4) colony forming units per mL Escherichia coli within less than 25 minutes. Several Escherichia coli strains were detected successfully, whereas non-related as well as closely related bacterial species produced no signal. The developed nucleic acid lateral flow assay is inexpensive, rapid to perform and requires no nucleic acid amplification step.
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Affiliation(s)
- Christopher Pöhlmann
- University of Bayreuth, Department of Biochemistry, Universitätsstr. 30, 95440 Bayreuth, Germany.
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