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Nucleic acid lateral flow assay for simultaneous detection of hygiene indicator bacteria. Anal Bioanal Chem 2021; 413:5003-5011. [PMID: 34132819 DOI: 10.1007/s00216-021-03462-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/29/2021] [Accepted: 06/08/2021] [Indexed: 01/10/2023]
Abstract
A simple and rapid polymerase chain reaction (PCR)-based lateral flow assay (LFA) was developed for multiplex detection of hygiene indicator bacteria. Specifically, new PCR primers were designed for accurately detecting Escherichia coli, coliform bacteria, and total bacteria, and the results obtained as a colorimetric signal (generated by the accumulation of gold nanoparticles at distinct test zones on flow strips) could be identified by the naked eye in <10 min after the completion of PCR. The proposed LFA system did not exhibit any cross-reactivities with 8 distinct bacterial strains and can detect down to 1 colony forming unit (CFU)/mL. Furthermore, three species of cultured bacteria (Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa) inoculated onto sterilized ham were successfully analyzed using the LFA system, which demonstrated that this system shows sufficient sensitivity and specificity for food hygiene monitoring. The speed and simplicity of this LFA make it suitable for use in the food industry as part of routine screening analysis.
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2
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Efficacy of microbiological culturing in the diagnostics of joint and periprosthetic infections. Injury 2021; 52 Suppl 1:S48-S52. [PMID: 32122626 DOI: 10.1016/j.injury.2020.02.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 02/09/2020] [Indexed: 02/02/2023]
Abstract
OBJECTIVES To evaluate the efficacy of conventional microbiological examinations in the diagnostics of septic joint and periprosthetic inflammations. DESIGN AND SETTING Evidence Level IV, retrospective clinical study of case series. Patients treated with small and large joint septic inflammations or with periprosthetic joint infections (PJI) were entered into the study. Demographics, microbiological cultures and inflammatory mediators were evaluated. PARTICIPANTS Between 2012 and 2016, total of 1116 hip and 241 knee surgeries were performed at our Department in relation to prostheses; including primary and revision arthroplasties and further surgeries due to PJI. During this period, 72 patients were operated with large joints infections or PJI and another 65 patients were treated due to small joint infections. MAIN OUTCOME MEASURES The main outcome of interest was to evaluate the sensitivity of conventional microbiological cultures in the primary diagnostics of joint and periprosthetic infections. RESULTS The most frequent bacteria strains were the Staphylococci: in 43 cases (22.16%) Staphylococcus aureus, in 22 cases (11.34%) coagulase-negative Staphylococcus, in 3 cases (1.54%) Staphylococcus epidermidis and in 4 cases (2.06%) methicillin-resistant S. aureus (MRSA) were detected. In 30 cases (21.88%), the primary microbiological investigation could not reveal the presence of bacteria. CONCLUSION Based on our data, the efficacy of conventional microbiological testing in the diagnostics of different type of joint infections is questionable. Therefore, further studies are warranted to evaluate the efficacy of novel diagnostic testing tools in prospective randomized controlled trials.
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Toubanaki DK, Karagouni E. Paper Lateral Flow Biosensor for Nodavirus Reverse Transcribed RNA Detection. Bio Protoc 2020; 10:e3711. [PMID: 33659375 DOI: 10.21769/bioprotoc.3711] [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: 03/27/2020] [Revised: 05/31/2020] [Accepted: 06/24/2020] [Indexed: 11/02/2022] Open
Abstract
Paper nanobiosensors have been established as an excellent platform for analysis of veterinary and human pathogens causing various diseases. Especially, lateral flow assays or biosensors ideal for sensitive, rapid, robust and accurate analysis in laboratory setups and on-site analysis. Viral RNA detection is of great importance for public health as well as animal health protection. In that aspect, the present protocol focuses on the development of functionalized gold nanoparticle-based lateral flow biosensor for fish nervous necrosis virus (Nodavirus) nucleic acids detection. Total viral RNA, isolated from fish samples was subjected to reverse transcription PCR amplification and the amplification products were mixed with specific oligonucleotide probe. A red test line was formed when nodavirus product was present. The proposed assay has great implications on basic research since it eliminates the need for time-consuming, cumbersome electrophoresis protocols and could be adjusted for use on the site of fish culture by fish farmers. Disease monitoring by such bioanalytical platforms without time consuming and costly procedures would have great impact on the aquaculture and environmental safety.
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Affiliation(s)
| | - Evdokia Karagouni
- Department of Microbiology, Hellenic Pasteur Institute, Athens, Greece
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4
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R NV, G H T, R DV, M H, H H, N S. Lateral Flow Genochromatographic Strip for Naked-Eye Detection of Mycobacterium Tuberculosis PCR Products with Gold Nanoparticles as a Reporter. J Biomed Phys Eng 2020; 10:307-318. [PMID: 32637375 PMCID: PMC7321395 DOI: 10.31661/jbpe.v0i0.1912-1018] [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: 12/16/2019] [Accepted: 01/14/2020] [Indexed: 11/16/2022]
Abstract
Background Mycobacterium tuberculosis (MTB) is a pathogen causing tuberculosis (TB) in human, and TB can cause enormous social and economic disruptions. Lateral flow test strips (LFTSs) are inexpensive, portable, disposable, rapid, and easy-to-use analytical tools. Objective LFTSs were prepared for the detection of MTB. LFTSs were fabricated using a new specific probe for MTB H37Rv, based on IS6110 sequence gene, and tailed with poly deoxyadenine (dA). Material and Methods In this experimental study, to create test and control zones, streptavidin (STP) and a 150-mer dA were dotted on a nitrocellolose membrane. Gold nanoparticles (GNPs) were conjugated with poly deoxythymidine sequence and placed on the conjugate pad. The composition of immersion buffers for sample pad and conjugate pad, running solution, solutions of GNPs-S-dT150 and STP were introduced. DNA genome of MTB and Mycobacterium bovis in clinical samples was amplified with PCR, and then detected by the LFTSs. During the assay, samples were firstly hybridized in two steps and then placed on a conjugate pad in a manner that positive and negative samples provided two and one red lines, respectively, on the detection pad. Results After PCR reaction with biotinylated primer, hybridization process with specific MTB probe-dA70-100 toke 10 min, and running process on the strip was performed within 5 min. Conclusion We showed that LFTS can discriminate a particular bacteria strain from others. The LFTSs can be redesigned for detection of other pathogenic genomes.
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Affiliation(s)
- Nazari-Vanani R
- MSc, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Tondro G H
- MSc, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Dehdari Vais R
- MSc, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Haghkhah M
- PhD, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Heli H
- PhD, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sattarahmady N
- PhD, Nanomedicine and Nanobiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
- PhD, Department of Medical Physics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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5
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Shende P, Prabhakar B, Patil A. Color changing sensors: A multimodal system for integrated screening. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115687] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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6
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Song S, Choi S, Ryu S, Kim S, Kim T, Shin J, Jung HI, Joo C. Highly sensitive paper-based immunoassay using photothermal laser speckle imaging. Biosens Bioelectron 2018; 117:385-391. [PMID: 29960270 DOI: 10.1016/j.bios.2018.06.024] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 06/08/2018] [Accepted: 06/08/2018] [Indexed: 12/15/2022]
Abstract
Paper-based lateral-flow assay (LFA) is a simple and inexpensive point-of-care device that has become commonplace in medicine, environmental monitoring, and over-the-counter personal use. Some LFAs have demonstrated comparable analytical performance with laboratory-based methods, but the detection limit or sensitivity of most LFAs is significantly inferior to other molecular techniques by 10-100 × . Consequently, LFAs are not viable for the early detection of disease-relevant biomarkers that are present in extremely small amounts in clinical specimens. Herein, we present a simple, cost-effective, and highly sensitive LFA sensor based on photothermal laser speckle imaging (PT-LSI). Under the illumination of a photothermal excitation light, gold nanoparticles (AuNPs), a common signal transduction medium in LFAs, absorb the light energy to produce heat, which subsequently induces modulation of the optical property and thermal deformation of the membrane. We measured these fluctuations through laser speckle imaging to quantify the concentration of AuNP-biomarker complexes. We experimentally demonstrate that the detection limit of our technique is superior to that of colorimetric detector by 68-125 × . The capability of our sensor for highly sensitive detection of disease biomarkers is validated by using U.S. FDA-approved LFA kits for cryptococcal antigens (CrAg).
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Affiliation(s)
- Seungri Song
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea
| | - Seoyeon Choi
- Mirimedix Inc., 43, Geodudanji 1-gil, Chuncheon, Gangwon-do, Republic of Korea
| | - Suho Ryu
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea
| | - Soocheol Kim
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea
| | - Tongwha Kim
- Department of Mechanical & Industrial Engineering, University of Toronto, Ontario M5S 1A1, Canada
| | - Joonchul Shin
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea
| | - Hyo-Il Jung
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea
| | - Chulmin Joo
- Department of Mechanical Engineering, Yonsei University, 50 Yonsei-ro, Seodaemoon-gu, Seoul 03722, Republic of Korea.
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7
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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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8
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Campoccia D, Speziale P, An Y, Del Pozo J, Ceresa L, Pegreffi F, Montanaro L, Arciola C. Innovative Methods of Rapid Bacterial Quantification and Applicability in Diagnostics and in Implant Materials Assessment. Int J Artif Organs 2018; 30:842-51. [DOI: 10.1177/039139880703000914] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
In recent years, a variety of new technologies have been proposed that allow rapid qualitative and quantitative microbiological analyses. In this paper we discuss the urgent needs for reliable and rapid microbiological analytical techniques in different applicative fields involving the research, production and medical application of implant materials, and the potential benefits derived from the use of new methods for rapid bacterial quantification. Current compendial methods are easy to perform and have gained confidence over their long period of use, but the supplemental use of new technologies could represent real breakthroughs whenever sensitive and rapid responses are urgently required and not met by the tests currently in use. Overall, the new microbiological methods require critical evaluation depending on their specific type of application and they may still not be thought of as totally substitutive, but they certainly exhibit considerable potential for different areas of biomaterials, as well as for advanced therapy medicinal and tissue engineering treatments.
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Affiliation(s)
- D. Campoccia
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna - Italy
| | - P. Speziale
- Department of Biochemistry, University of Pavia, Pavia - Italy
| | - Y.H. An
- Orthopedic Research Laboratory, Medical University of South Carolina, Charleston, South Carolina - USA
| | - J.L. Del Pozo
- Division of Infectious Diseases and Clinical Microbiology, University Clinic of Navarra, Pamplona - Spain
| | - L. Ceresa
- Pall Life Science, Pall Italia srl, Buccinasco - Italy
| | - F. Pegreffi
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna - Italy
| | - L. Montanaro
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna - Italy
- Department of Experimental Pathology, University of Bologna, Bologna - Italy
| | - C.R. Arciola
- Research Unit on Implant Infections, Rizzoli Orthopedic Institute, Bologna - Italy
- Department of Experimental Pathology, University of Bologna, Bologna - Italy
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Taboada L, Sánchez A, Pérez-Martín RI, Sotelo CG. A new method for the rapid detection of Atlantic cod (Gadus morhua), Pacific cod (Gadus macrocephalus), Alaska pollock (Gadus chalcogrammus) and ling (Molva molva) using a lateral flow dipstick assay. Food Chem 2017; 233:182-189. [PMID: 28530564 DOI: 10.1016/j.foodchem.2017.04.087] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 10/25/2016] [Accepted: 04/15/2017] [Indexed: 10/19/2022]
Abstract
Species-specific lateral flow dipstick (LFD) assays for the identification of Atlantic cod (Gadus morhua), Pacific cod (Gadus macrocephalus), Alaska pollock (Gadus chalcogrammus) and ling (Molva molva) in food products were developed. The method comprises a PCR system with four sets of specific primers, for each target species. This step was also devised to dual-labeling of PCR products with biotin and 6-FAM, which are then easily read on a lateral flow dipstick, upon which these products are immobilized by a fixed biotin-ligand and visualized with anti-FAM antibody-coated gold nanoparticles. Sensitivity and selectivity were determined for each of the developed assays. Validation of the assays was performed with DNA extracted from commercial fish products, the identification of all samples by PCR-LFD was coherent with the results found with DNA sequencing. Target species were successfully detected in analyzed commercial samples, demonstrating the applicability of this method to the rapid analysis of food products.
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Affiliation(s)
- Ledicia Taboada
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, E-36208 Vigo, Spain.
| | - Ana Sánchez
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, E-36208 Vigo, Spain.
| | - Ricardo I Pérez-Martín
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, E-36208 Vigo, Spain.
| | - Carmen G Sotelo
- Instituto de Investigaciones Marinas (IIM-CSIC), Eduardo Cabello 6, E-36208 Vigo, Spain.
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10
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Fraser S, Shih JY, Ware M, O'Connor E, Cameron MJ, Schwickart M, Zhao X, Regnstrom K. Current Trends in Ligand Binding Real-Time Measurement Technologies. AAPS JOURNAL 2017; 19:682-691. [PMID: 28321830 DOI: 10.1208/s12248-017-0067-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 02/24/2017] [Indexed: 01/01/2023]
Abstract
Numerous advances in ligand binding assay (LBA) real-time measurement technologies have been made within the last several years, ranging from the development of novel platforms to drive technology expansion to the adaptation of existing platforms to optimize performance and throughput. In this review, we have chosen to focus on technologies that provide increased value to two distinct segments of the LBA community. First, experimentally, by measuring real-time binding events, these technologies provide data that can be used to interrogate receptor/ligand binding interactions. While overall the platforms are not new, they have made significant advances in throughput, multiplexing, and/or sensitivity. Second, clinically, these point-of-care (POC) technologies provide instantaneous information which facilitates rapid treatment decisions.
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Affiliation(s)
| | - Judy Y Shih
- Amgen Inc., One Amgen Center Drive, Thousand Oaks, California, 91320, USA
| | - Mark Ware
- Janssen Research & Development, LLC, 1400 McKean Road, Spring House, Pennsylvania, 19477, USA
| | - Edward O'Connor
- AegisBioconsult, 78 Marbern Dr., Suffield, Connecticut, 06078, USA
| | - Mark J Cameron
- Lumigen, 22900 8 Mile Road, Southfield, Michigan, 48033, USA
| | - Martin Schwickart
- MedImmune, 319 N. Bernardo Ave, Mountain View, California, 94043, USA
| | - Xuemei Zhao
- Merck Research Laboratories, Rahway, New Jersey, 07065, USA
| | - Karin Regnstrom
- Boehringer Ingelheim, 6701 Kaiser Drive, Fremont, California, 94555, USA
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11
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Toubanaki DK, Athanasiou E, Karagouni E. Gold nanoparticle-based lateral flow biosensor for rapid visual detection of Leishmania-specific DNA amplification products. J Microbiol Methods 2016; 127:51-58. [PMID: 27255490 DOI: 10.1016/j.mimet.2016.05.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/26/2016] [Accepted: 05/28/2016] [Indexed: 01/22/2023]
Abstract
Leishmaniasis is a disease, caused by Leishmania parasites, which infect humans and animals, posing a major social and economic burden worldwide. The need for accurate and sensitive disease diagnosis led to the widespread adoption of PCR amplification. Detection of the amplification products (i.e. gel electrophoresis) require time-consuming protocols performed by trained personnel, with high cost. Aim of the present study was the simplification of PCR product detection, using a nucleic acid lateral flow, combined with functionalized gold nanoparticles. Amplification reactions targeting kinetoplastid DNA of Leishmania spp were performed on canine blood samples and a positive signal was formed as a red test zone. The visual detection was completed in 20min. Extensive optimization enabled the detection of 100fmol of target DNA. Clinical samples of infected dog blood were analyzed with high specificity. Overall, the proposed lateral flow biosensor can be considered an appealing alternative platform for Leishmania-specific amplification products detection with low cost and attractive simplicity.
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Affiliation(s)
- Dimitra K Toubanaki
- Laboratory of Cellular Immunology, Department of Microbiology, Hellenic Pasteur Institute, 127 Vas. Sofias Ave., 11521 Athens, Greece.
| | - Evita Athanasiou
- Laboratory of Cellular Immunology, Department of Microbiology, Hellenic Pasteur Institute, 127 Vas. Sofias Ave., 11521 Athens, Greece.
| | - Evdokia Karagouni
- Laboratory of Cellular Immunology, Department of Microbiology, Hellenic Pasteur Institute, 127 Vas. Sofias Ave., 11521 Athens, Greece.
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Development of a Nano-Gold Capillary Immunochromatographic Assay for Rapid and Semi-Quantitative Detection of Clenbuterol Residues. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0442-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Fountoglou N, Petropoulou M, Iliadi A, Christopoulos TK, Ioannou PC. Τwo-panel molecular testing for genetic predisposition for thrombosis using multi-allele visual biosensors. Anal Bioanal Chem 2016; 408:1943-52. [DOI: 10.1007/s00216-016-9310-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/25/2015] [Accepted: 01/04/2016] [Indexed: 01/29/2023]
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14
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Terao Y, Takeshita K, Nishiyama Y, Morishita N, Matsumoto T, Morimatsu F. Promising Nucleic Acid Lateral Flow Assay Plus PCR for Shiga Toxin-Producing Escherichia coli. J Food Prot 2015; 78:1560-8. [PMID: 26219371 DOI: 10.4315/0362-028x.jfp-14-495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Shiga toxin (Stx)-producing Escherichia coli (STEC) is a frequent cause of foodborne infections, and methods for rapid and reliable detection of STEC are needed. A nucleic acid lateral flow assay (NALFA) plus PCR was evaluated for detecting STEC after enrichment. When cell suspensions of 45 STEC strains, 14 non-STEC strains, and 13 non-E. coli strains were tested with the NALFA plus PCR, all of the STEC strains yielded positive results, and all of the non-STEC and non-E. coli strains yielded negative results. The lower detection limit for the STEC strains ranged from 0.1 to 1 pg of genomic DNA (about 20 to 200 CFU) per test, and the NALFA plus PCR was able to detect Stx1- and Stx2-producing E. coli strains with similar sensitivities. The ability of the NALFA plus PCR to detect STEC in enrichment cultures of radish sprouts, tomato, raw ground beef, and beef liver inoculated with 10-fold serially diluted STEC cultures was comparable to that of a real-time PCR assay (at a level of 100 to 100,000 CFU/ml in enrichment culture). The bacterial inoculation test in raw ground beef revealed that the lower detection limit of the NALFA plus PCR was also comparable to that obtained with a real-time PCR assay that followed the U.S. Department of Agriculture guidelines. Although further evaluation is required, these results suggest that the NALFA plus PCR is a specific and sensitive method for detecting STEC in a food manufacturing plant.
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Affiliation(s)
- Yoshitaka Terao
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan.
| | - Kana Takeshita
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
| | - Yasutaka Nishiyama
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
| | - Naoki Morishita
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
| | - Takashi Matsumoto
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
| | - Fumiki Morimatsu
- R&D Center, NH Foods Ltd., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
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Toubanaki DK, Margaroni M, Karagouni E. Nanoparticle-based lateral flow biosensor for visual detection of fish nervous necrosis virus amplification products. Mol Cell Probes 2015; 29:158-66. [DOI: 10.1016/j.mcp.2015.03.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/05/2015] [Accepted: 03/12/2015] [Indexed: 10/23/2022]
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16
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Lateral flow devices for nucleic acid analysis exploiting quantum dots as reporters. Anal Chim Acta 2015; 864:48-54. [PMID: 25732426 DOI: 10.1016/j.aca.2015.01.020] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/08/2015] [Accepted: 01/14/2015] [Indexed: 12/16/2022]
Abstract
There is a growing interest in the development of biosensors in the form of simple lateral flow devices that enable visual detection of nucleic acid sequences while eliminating several steps required for pipetting, incubation and washing out the excess of reactants. In this work, we present the first dipstick-type nucleic acid biosensors based on quantum dots (QDs) as reporters. The biosensors enable sequence confirmation of the target DNA by hybridization and simple visual detection of the emitted fluorescence under a UV lamp. The 'diagnostic' membrane of the biosensor contains a test zone (TZ) and a control zone (CZ). The CZ always fluoresces in order to confirm the proper function of the biosensor. Fluorescence is emitted from the TZ, only when the specific nucleic acid sequence is present. We have developed two general types of QD-based nucleic acid biosensors, namely, Type I and Type II, in which the TZ consists of either immobilized streptavidin (Type I) or immobilized oligodeoxynucleotides (Type II). The control zone consists of immobilized biotinylated albumin. No purification steps are required prior to the application of the DNA sample on the strip. The QD-based nucleic acid biosensors performed accurately and reproducibly when applied to (a) the visual detection of PCR amplification products and (b) visual genotyping of single nucleotide polymorphisms (SNPs) in human genomic DNA from clinical samples. As low as 1.5 fmol of double-stranded DNA were clearly detected by naked eye and the dynamic range extended to 200 fmol. The %CV were estimated to be 4.3-8.2.
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Is synovial C-reactive protein a useful marker for periprosthetic joint infection? Clin Orthop Relat Res 2014; 472:3997-4003. [PMID: 25070920 PMCID: PMC4397770 DOI: 10.1007/s11999-014-3828-y] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Accepted: 07/15/2014] [Indexed: 01/31/2023]
Abstract
BACKGROUND Serum C-reactive protein (CRP) is a general marker of inflammation, and recent studies suggest that measurement of CRP in synovial fluid may be a more accurate method for diagnosing periprosthetic joint infection (PJI). QUESTIONS/PURPOSES We aimed to (1) determine if there is a correlation between serum and synovial CRP values, (2) establish cutoff values for diagnosing infection based on serum and synovial CRP, and (3) compare the utility of measuring CRP in synovial fluid versus serum for the diagnosis of PJI using standard assay equipment available at most hospitals. METHODS Between February 2011 and March 2012, we invited all 150 patients scheduled for revision TKA (84) or THA (66) to participate in this prospective study, of whom 100% agreed. Data ultimately were missing for 31 patients, leaving 60 patients undergoing revision TKA and 59 undergoing revision THA (71% and 89% of the original group, respectively) for whom CRP level was measured in serum and synovial fluid samples. Patients were deemed to have a PJI (32) or no infection (87) using Musculoskeletal Infection Society criteria. Serum and synovial CRP levels were assayed using the same immunospectrophotometer and the correlation coefficient was calculated. Receiver operating characteristic curve analyses were performed to compare utility in diagnosing PJI, which included area under the curve, diagnostic threshold, and test sensitivity, specificity, predictive values, and accuracy. In 22 of 150 patients (14.7%), synovial CRP could not be measured because the sample was too viscous or hemolyzed. RESULTS In the analyzed 119 samples, there was a strong correlation (r = 0.76; p < 0.001) between synovial and serum CRP. The area under the curve was 0.90 both for the synovial fluid (95% CI, 0.82-0.97) and serum (95% CI, 0.84-0.96) CRP assays. The diagnostic thresholds were 6.6 mg/L for synovial fluid and 11.2 mg/L for serum. Sensitivities, specificities, positive predictive value, negative predictive value, and accuracies were similar for synovial fluid and serum assays. CONCLUSIONS Although recent studies have suggested a superiority of synovial fluid CRP over serum CRP for the diagnosis of PJI, we found that measurement of CRP in synovial fluid rather than serum using readily available assay equipment does not offer a diagnostic advantage in detection of PJIs. LEVEL OF EVIDENCE Level II, diagnostic study. See the Instructions to Authors for a complete description of levels of evidence.
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Lenski M, Scherer MA. Synovial IL-6 as inflammatory marker in periprosthetic joint infections. J Arthroplasty 2014; 29:1105-9. [PMID: 24559521 DOI: 10.1016/j.arth.2014.01.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 10/09/2013] [Accepted: 01/14/2014] [Indexed: 02/01/2023] Open
Abstract
We analyzed serum and synovial biomarkers of 69 patients. 31 of them suffered from a periprosthetic joint infection (PJI) and 38 from aseptic arthralgia after total joint arthroplasty. We used Receiver-Operating-Characteristic-curves to calculate the Area-under-the-curve (AUC), cutoff-values, positive (+LR), negative (-LR) and interval-Likelihood-Ratios (iLR) for predicting a PJI. The most significant parameter was synovial interleukin-6 (IL-6) (cutoff-value ≥ 30,750 pg/ml, AUC = 0.959, SE = 90.0%, SP = 94.7%, +LR = 17.27), followed by synovial lactate (cutoff-value ≥ 8.3 mmol/l, AUC = 0.844, SE = 71.4%, SP=88.0%, +LR = 5.95), and synovial glucose (cutoff-value ≤ 44 mg/dl, AUC = 0.829, SE = 79.2%, SP = 78.6%, +LR = 3.69). IL-6 ≥ 30,750 pg/ml and lactate ≥ 10 mmol/l make a PJI very likely, IL-6 <10,000pg/ml or lactate <4.3 mmol/l makes a PJI very unlikely. If none of these thresholds are met, physicians should use the iLR of IL-6, glucose and lactate to estimate the likelihood of PJI.
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Affiliation(s)
- Markus Lenski
- Department of Orthopedics and Trauma Surgery, Klinikum Dachau, Academic Teaching Hospital of the Ludwig-Maximilians-University of Munich, 7 Krankenhausstraße 15, 85221 Dachau, Germany; Faculty of Medicine, Technical University of Munich, Munich, Germany
| | - Michael A Scherer
- Department of Orthopedics and Trauma Surgery, Klinikum Dachau, Academic Teaching Hospital of the Ludwig-Maximilians-University of Munich, 7 Krankenhausstraße 15, 85221 Dachau, Germany
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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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20
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Thangavel H. Nanobiology in Medicine. Nanomedicine (Lond) 2014. [DOI: 10.1007/978-1-4614-2140-5_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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21
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Mao X, Wang W, Du TE. Dry-reagent nucleic acid biosensor based on blue dye doped latex beads and lateral flow strip. Talanta 2013; 114:248-53. [DOI: 10.1016/j.talanta.2013.04.044] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 04/17/2013] [Accepted: 04/21/2013] [Indexed: 02/07/2023]
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Li P, Zhang Z, Zhang Q, Zhang N, Zhang W, Ding X, Li R. Current development of microfluidic immunosensing approaches for mycotoxin detection via capillary electromigration and lateral flow technology. Electrophoresis 2012; 33:2253-65. [PMID: 22887149 DOI: 10.1002/elps.201200050] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mycotoxin contamination in the food chain has caused serious health issues in humans and animals. Thus, a rapid on-site and lab-independent detection method for mycotoxins, such as aflatoxins (AFTs), is desirable. Microfluidic chip based immunosensor technology is one of the most promising methods for fast mycotoxin assays. In this review, we cover the major microfluidic immunosensors used for mycotoxin analysis, via flow-through (capillary electromigration) and lateral flow technology. Sample preparation from different matrices of agricultural products and foodstuffs is summarized. The choice of materials, fabrication strategies, and detection methods for microfluidic immunosensors are further discussed in detail. The sensors application in mycotoxin determination is also outlined. Finally, future challenges and opportunities are discussed.
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Affiliation(s)
- Peiwu Li
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Wuhan, P. R. China.
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Parvizi J, McKenzie JC, Cashman JP. Diagnosis of periprosthetic joint infection using synovial C-reactive protein. J Arthroplasty 2012; 27:12-6. [PMID: 22560655 DOI: 10.1016/j.arth.2012.03.018] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2011] [Accepted: 03/13/2012] [Indexed: 02/01/2023] Open
Abstract
The diagnosis of periprosthetic joint infection (PJI) is a considerable challenge. This study examines the quantification of C-reactive protein (CRP) in synovial fluid for diagnosis of PJI. Synovial fluid samples were collected prospectively from 63 patients undergoing revision or primary joint arthroplasty. All patients were divided into septic vs aseptic groups. There were 43 patients in the aseptic group and 20 patients in the septic group. There was a statistically significant difference in the mean synovial CRP between the septic cohort at 40 mg/L vs a mean of 2 mg/L for aseptic failure (P < .0001). The sensitivity was 85% with 95% specificity at a threshold of 9.5 mg/L. The area under the curve was 0.92. We believe that synovial CRP assay holds great promise as a diagnostic marker for PJI.
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Affiliation(s)
- Javad Parvizi
- Rothman Institute of Orthopedics, Thomas Jefferson University Hospital, 925 Chestnut Street, Philadelphia, Pennsylvania 19107, USA
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24
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Wetters NG, Berend KR, Lombardi AV, Morris MJ, Tucker TL, Della Valle CJ. Leukocyte esterase reagent strips for the rapid diagnosis of periprosthetic joint infection. J Arthroplasty 2012; 27:8-11. [PMID: 22608686 DOI: 10.1016/j.arth.2012.03.037] [Citation(s) in RCA: 111] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Accepted: 03/20/2012] [Indexed: 02/01/2023] Open
Abstract
A total of 223 consecutive total hip or total knee arthroplasties were evaluated for periprosthetic joint infection (PJI) using leukocyte esterase reagent (LER) strips. Fifty-two LER strips were read as positive (23.3%), 106 were read as negative (47.5%), and 65 strips (29.2%) were unable to be read secondary to debris or blood in the aspiration. Using a synovial fluid white blood cell count of greater than 3000 white blood cell per microliter as an indicator of PJI, the sensitivity and specificity were 92.9% and 88.8%, respectively. When using positive cultures for diagnosis of PJI, sensitivity and specificity were 93.3% and 77.0% and 100% and 86.8% for the cases where a reoperation was performed and a combination of factors were used to define PJI. Leukocyte esterase reagent strips represent a rapid, inexpensive, and sensitive tool for the diagnosis of PJI. Their utility is limited, however, by blood or debris in the synovial fluid rendering them unreadable in one-third of cases.
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Affiliation(s)
- Nathan G Wetters
- Department of Orthopaedic Surgery, Rush University Medical Center, Chicago, Illinois 60612, USA
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Ang GY, Yu CY, Yean CY. Ambient temperature detection of PCR amplicons with a novel sequence-specific nucleic acid lateral flow biosensor. Biosens Bioelectron 2012; 38:151-6. [PMID: 22705404 DOI: 10.1016/j.bios.2012.05.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2012] [Revised: 05/08/2012] [Accepted: 05/15/2012] [Indexed: 12/17/2022]
Abstract
In the field of diagnostics, molecular amplification targeting unique genetic signature sequences has been widely used for rapid identification of infectious agents, which significantly aids physicians in determining the choice of treatment as well as providing important epidemiological data for surveillance and disease control assessment. We report the development of a rapid nucleic acid lateral flow biosensor (NALFB) in a dry-reagent strip format for the sequence-specific detection of single-stranded polymerase chain reaction (PCR) amplicons at ambient temperature (22-25°C). The NALFB was developed in combination with a linear-after-the-exponential PCR assay and the applicability of this biosensor was demonstrated through detection of the cholera toxin gene from diarrheal-causing toxigenic Vibrio cholerae. Amplification using the advanced asymmetric PCR boosts the production of fluorescein-labeled single-stranded amplicons, allowing capture probes immobilized on the NALFB to hybridize specifically with complementary targets in situ on the strip. Subsequent visual formation of red lines is achieved through the binding of conjugated gold nanoparticles to the fluorescein label of the captured amplicons. The visual detection limit observed with synthetic target DNA was 0.3 ng and 1 pg with pure genomic DNA. Evaluation of the NALFB with 164 strains of V. cholerae and non-V. cholerae bacteria recorded 100% for both sensitivity and specificity. The whole procedure of the low-cost NALFB, which is performed at ambient temperature, eliminates the need for preheated buffers or additional equipment, greatly simplifying the protocol for sequence-specific PCR amplicon analysis.
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Affiliation(s)
- Geik Yong Ang
- Department of Medical Microbiology & Parasitology, School of Medical Sciences, Health Campus, Universiti Sains Malaysia, 16150 Kubang Kerian, Kelantan, Malaysia.
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26
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Parvizi J, Jacovides C, Adeli B, Jung KA, Hozack WJ. Mark B. Coventry Award: synovial C-reactive protein: a prospective evaluation of a molecular marker for periprosthetic knee joint infection. Clin Orthop Relat Res 2012; 470:54-60. [PMID: 21786056 PMCID: PMC3237977 DOI: 10.1007/s11999-011-1991-y] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND C-reactive protein (CRP) serum assays are a standard element of the diagnostic workup for periprosthetic joint infection (PJI). However, because CRP is a marker for systemic inflammation, this test is not specific to PJI. QUESTIONS/PURPOSES Our purpose was to assess whether synovial fluid and serum assays alone could differentiate between infected and uninfected revision knee arthroplasties and to determine which of these methods had the greatest diagnostic accuracy. METHODS We collected synovial fluid specimens from 66 patients undergoing revision total knee arthroplasty. Patients were judged uninfected or infected by standardized criteria. Synovial CRP levels were measured using an individual CRP assay (15 samples; 10 infected, five uninfected) and a multiplex immunoassay platform (59 samples; 25 infected, 34 uninfected). Results from preoperative standard serum CRP assays conducted were also collected (55 samples; 25 infected, 30 uninfected). Sensitivity, specificity, and receiver operating characteristic curve analyses were performed for each assay with a diagnosis of infection based on previously established criteria. RESULTS Synovial CRP concentrations differed between infected and uninfected joints in the multiplex and serum analyses. The area under the curve was 0.84 for the individual assay, 0.91 for the multiplex assay, and 0.88 for the serum CRP assay. Sensitivity and specificity were 70.0% and 100.0% for the individual enzyme-linked immunosorbent assay, 84.0% and 97.1% for the multiplex assay, and 76.0% and 93.3% for the serum CRP assay. CONCLUSIONS An assay measuring CRP in synovial fluid may be more accurate in diagnosing PJI than the standard serum CRP assay. We believe such an assay holds promise as a new diagnostic marker for PJI.
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Affiliation(s)
- Javad Parvizi
- Rothman Institute at Thomas Jefferson University, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107 USA
| | - Christina Jacovides
- Rothman Institute at Thomas Jefferson University, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107 USA
| | - Bahar Adeli
- Rothman Institute at Thomas Jefferson University, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107 USA
| | - Kwang Am Jung
- Rothman Institute at Thomas Jefferson University, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107 USA
| | - William J. Hozack
- Rothman Institute at Thomas Jefferson University, 925 Chestnut Street, 5th Floor, Philadelphia, PA 19107 USA
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27
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Detection of sulphathiazole in honey samples using a lateral flow immunoassay. Food Chem 2011; 129:624-629. [DOI: 10.1016/j.foodchem.2011.04.080] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 03/21/2011] [Accepted: 04/25/2011] [Indexed: 11/21/2022]
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28
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Jacovides CL, Parvizi J, Adeli B, Jung KA. Molecular markers for diagnosis of periprosthetic joint infection. J Arthroplasty 2011; 26:99-103.e1. [PMID: 21570803 DOI: 10.1016/j.arth.2011.03.025] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Accepted: 03/11/2011] [Indexed: 02/01/2023] Open
Abstract
Despite a battery of tests available for diagnosing periprosthetic joint infection, as yet, no gold standard has been identified. Our purpose was to measure inflammatory proteins in synovial fluid from patients undergoing revision arthroplasty for septic or aseptic failure. We analyzed 74 synovial fluid samples: 31 infected and 43 uninfected, based on clinical and laboratory criteria. Proteomics analysis and receiver operating characteristic curve analyses were conducted on 46 inflammatory proteins for each sample. Of 46 proteins, 5 (interleukin 6, interleukin 8, α(2)-macroglobulin, C-reactive protein, and vascular endothelial growth factor) had an area under the curve greater than 0.90. This prospective study has demonstrated promising results for the use of molecular markers in diagnosis of periprosthetic joint infection. Future studies will focus on designing assays with these proteins in mind.
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Affiliation(s)
- Christina L Jacovides
- Rothman Institute of Orthopaedics at Thomas Jefferson University Hospital, Philadelphia, Pennsylvania 19107, USA
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29
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Kalogianni DP, Boutsika LM, Kouremenou PG, Christopoulos TK, Ioannou PC. Carbon nano-strings as reporters in lateral flow devices for DNA sensing by hybridization. Anal Bioanal Chem 2011; 400:1145-52. [PMID: 21424520 DOI: 10.1007/s00216-011-4845-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Revised: 02/06/2011] [Accepted: 02/15/2011] [Indexed: 02/03/2023]
Abstract
Presently, there is a growing interest in the development of lateral flow devices for nucleic acid analysis that enable visual detection of the target sequence (analyte) while eliminating several steps required for pipetting, incubation, and washing out the excess of reactants. In this paper, we present, for the first time, lateral flow tests exploiting oligonucleotide-functionalized and antibody-functionalized carbon nanoparticles (carbon nano-strings, CBNS) as reporters that enable confirmation of the target DNA sequence by hybridization. The CBNS reporters were applied to (a) the detection of PCR products and (b) visual genotyping of single nucleotide polymorphisms in human genomic DNA. Biotinylated PCR product was hybridized with a dA-tailed probe. In one assay configuration, the hybrid is captured at the test zone of the strip by immobilized streptavidin and detected by (dT)(30)-CBNS. In a second configuration, the hybrids are captured from immobilized (dA) strands and detected by antibiotin-CBNS. As low as 2.5 fmol of amplified DNA can be detected. For visual genotyping, allele-specific primers with a 5' oligo(dA) segment are extended by DNA polymerase with a concomitant incorporation of biotin moieties. Extension products are detected either by (dT)(30)-CBNS or by antibiotin-CBNS. Only three cycles of extension reaction are sufficient for detection. No purification of the PCR products or the extension product is required.
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30
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Noguera P, Posthuma-Trumpie GA, van Tuil M, van der Wal FJ, de Boer A, Moers APHA, van Amerongen A. Carbon nanoparticles in lateral flow methods to detect genes encoding virulence factors of Shiga toxin-producing Escherichia coli. Anal Bioanal Chem 2011; 399:831-8. [PMID: 21046083 PMCID: PMC3015178 DOI: 10.1007/s00216-010-4334-z] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Revised: 10/07/2010] [Accepted: 10/12/2010] [Indexed: 01/10/2023]
Abstract
The use of carbon nanoparticles is shown for the detection and identification of different Shiga toxin-producing Escherichia coli virulence factors (vt1, vt2, eae and ehxA) and a 16S control (specific for E. coli) based on the use of lateral flow strips (nucleic acid lateral flow immunoassay, NALFIA). Prior to the detection with NALFIA, a rapid amplification method with tagged primers was applied. In the evaluation of the optimised NALFIA strips, no cross-reactivity was found for any of the antibodies used. The limit of detection was higher than for quantitative PCR (q-PCR), in most cases between 10(4) and 10(5) colony forming units/mL or 0.1-0.9 ng/μL DNA. NALFIA strips were applied to 48 isolates from cattle faeces, and results were compared to those achieved by q-PCR. E. coli virulence factors identified by NALFIA were in very good agreement with those observed in q-PCR, showing in most cases sensitivity and specificity values of 1.0 and an almost perfect agreement between both methods (kappa coefficient larger than 0.9). The results demonstrate that the screening method developed is reliable, cost-effective and user-friendly, and that the procedure is fast as the total time required is <1 h, which includes amplification.
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Affiliation(s)
- P. Noguera
- Wageningen UR Food & Biobased Research, Biomolecular Sensing & Diagnostics, P.O. Box 17, 6700 AA Wageningen, the Netherlands
- Instituto de Reconocimiento Molecular y Desarrollo Tecnológico, Departamento de Química, Universidad Politécnica de Valencia, Camino de Vera, s/n, 46020 Valencia, Spain
| | - G. A. Posthuma-Trumpie
- Wageningen UR Food & Biobased Research, Biomolecular Sensing & Diagnostics, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - M. van Tuil
- Wageningen UR Food & Biobased Research, Biomolecular Sensing & Diagnostics, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - F. J. van der Wal
- Wageningen UR Central Veterinary Institute, Division Bacteriology and TSEs, P.O. Box 65, 8200 AB Lelystad, the Netherlands
| | - A. de Boer
- Wageningen UR Central Veterinary Institute, Division Bacteriology and TSEs, P.O. Box 65, 8200 AB Lelystad, the Netherlands
| | - A. P. H. A. Moers
- Wageningen UR Food & Biobased Research, Biomolecular Sensing & Diagnostics, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - A. van Amerongen
- Wageningen UR Food & Biobased Research, Biomolecular Sensing & Diagnostics, P.O. Box 17, 6700 AA Wageningen, the Netherlands
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Andrade TPD, Lightner DV. Development of a method for the detection of infectious myonecrosis virus by reverse-transcription loop-mediated isothermal amplification and nucleic acid lateral flow hybrid assay. JOURNAL OF FISH DISEASES 2009; 32:911-924. [PMID: 19531063 DOI: 10.1111/j.1365-2761.2009.01072.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report the development of a reverse-transcription loop-mediated isothermal amplification and nucleic acid lateral flow method (RT-LAMP-NALF) for detection of infectious myonecrosis virus (IMNV). The RT-LAMP-NALF method combines simplified nucleic acid extraction, a reverse-transcription loop-mediated isothermal amplification platform, and one-step visual colorimetric confirmation of the IMNV amplified sequences using a generic NALF qualitative detection test strip. The sensitivity of RT-LAMP (using two and three primer pairs) and nested RT-LAMP (using three primer pairs) was compared by real-time reverse-transcription-polymerase chain reaction (RT-PCR) using TaqMan probe. The detection of RT-LAMP (three primer pairs) products was accomplished by using a NALF-test strip. The RT-LAMP-NALF showed equivalent sensitivity to RT-LAMP (using three primer pairs), and it was found to be 100 and 10 times more sensitive than one-step RT-PCR and RT-LAMP (two primer pairs), respectively. On the other hand, the RT-LAMP-NALF was 10 and 100 times less sensitive than nested RT-PCR and real-time RT-PCR, respectively. The simplified RNA extraction method ranged from 4.4 x 10(6) to 2.2 x 10(8) IMNV copy numbers microL(-1) RNA, and it was similar with the standard RNA extraction (from 1.2 x 10(6) to 6.3 x 10(7) IMNV copy numbers microL(-1) RNA). These results clearly demonstrate that the RT-LAMP-NALF method is specific, sensitive, can shorten the time for analysis, and has potential application for IMNV diagnosis in resource-poor diagnostic settings.
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Affiliation(s)
- T P D Andrade
- Department of Veterinary Science and Microbiology, University of Arizona, Tucson, AZ 85721, USA.
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Litos IK, Ioannou PC, Christopoulos TK, Traeger-Synodinos J, Kanavakis E. Multianalyte, dipstick-type, nanoparticle-based DNA biosensor for visual genotyping of single-nucleotide polymorphisms. Biosens Bioelectron 2009; 24:3135-9. [PMID: 19349158 DOI: 10.1016/j.bios.2009.03.010] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2008] [Revised: 03/09/2009] [Accepted: 03/09/2009] [Indexed: 12/14/2022]
Abstract
DNA biosensors involve molecular recognition of the target sequence by hybridization with specific probes and detection by electrochemical, optical or gravimetric transduction. Disposable, dipstick-type biosensors have been developed recently, which enable visual detection of DNA without using instruments. In this context, we report a multianalyte DNA biosensor for visual genotyping of two single-nucleotide polymorphisms (SNPs). As a model, the biosensor was applied to the simultaneous genotyping of two SNPs, entailing the detection of four alleles. A PCR product that flanks both polymorphic sites is subjected to a single primer extension (PEXT) reaction employing four allele-specific primers, each containing a region complementary to an allele and a characteristic segment that enables subsequent capture on a test zone of the biosensor. The primers are extended with dNTPs and biotin-dUTP only if there is perfect complementarity with the interrogated sequence. The PEXT mixture is applied to the biosensor. As the developing buffer migrates along the strip, all the allele-specific primers are captured by immobilized oligonucleotides at the four test zones of the biosensor and detected by antibiotin-functionalized gold nanoparticles. As a result, the test zones are colored red if extension has occurred denoting the presence of the corresponding allele in the original sample. The excess nanoparticles are captured by immobilized biotinylated albumin at the control zone of the sensor forming another red zone that indicates the proper performance of the system. The assay was applied successfully to the genotyping of twenty clinical samples for two common SNPs of MBL2 gene.
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Affiliation(s)
- Ioannis K Litos
- Department of Chemistry, University of Athens, Athens 15771, Greece
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Mao X, Ma Y, Zhang A, Zhang L, Zeng L, Liu G. Disposable Nucleic Acid Biosensors Based on Gold Nanoparticle Probes and Lateral Flow Strip. Anal Chem 2009; 81:1660-8. [PMID: 19159221 DOI: 10.1021/ac8024653] [Citation(s) in RCA: 285] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Xun Mao
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
| | - Yunqing Ma
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
| | - Aiguo Zhang
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
| | - Lurong Zhang
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
| | - Lingwen Zeng
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
| | - Guodong Liu
- Department of Chemistry and Molecular Biology, North Dakota State University, Fargo, North Dakota 58105, DiaCarta LLC, 6519 Dumbarton Circle, Fremont, California 94555, Panomics, Inc., 6519 Dumbarton Circle, Fremont, California 94555, Department of Radiation Oncology, University of Rochester Medical Center, Rochester, New York 14642-8647, and Laboratory of Molecular Diagnostics, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, Guangdong, China, 510663
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Dipstick-type biosensor for visual detection of DNA with oligonucleotide-decorated colored polystyrene microspheres as reporters. Biosens Bioelectron 2008; 24:1811-5. [PMID: 18951010 DOI: 10.1016/j.bios.2008.08.056] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2008] [Revised: 07/31/2008] [Accepted: 08/28/2008] [Indexed: 11/22/2022]
Abstract
In recent years, there is a continuously growing interest in the development of biosensors for rapid, simple and inexpensive DNA tests suitable for the small laboratory or for on-site testing. Detection is accomplished through electrochemical, optical or gravimetric transduction. We report on the development of disposable dipstick-type DNA biosensors that employ oligonucleotide-decorated colored polystyrene microspheres as reporters and enable visual detection of DNA sequences without the use of instrumentation. The biosensors have been designed to detect DNA molecules that contain both, a biotin moiety and a segment that is complementary to the oligonucleotide attached on the surface of blue or red microspheres. Capture of the hybrids by immobilized streptavidin at the test zone results in the formation of a colored line. The biosensors were applied to: (a) detection of single-stranded DNA, (b) detection of PCR-amplified double-stranded DNA and (c) genotyping of single nucleotide polymorphisms (SNP). The results were compared with sensors based on gold nanoparticle reporters. It is also demonstrated that the microspheres offer the potential for multicolor detection of specific DNA sequences.
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Lateral flow (immuno)assay: its strengths, weaknesses, opportunities and threats. A literature survey. Anal Bioanal Chem 2008; 393:569-82. [PMID: 18696055 DOI: 10.1007/s00216-008-2287-2] [Citation(s) in RCA: 931] [Impact Index Per Article: 58.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 07/01/2008] [Accepted: 07/03/2008] [Indexed: 10/21/2022]
Abstract
Lateral flow (immuno)assays are currently used for qualitative, semiquantitative and to some extent quantitative monitoring in resource-poor or non-laboratory environments. Applications include tests on pathogens, drugs, hormones and metabolites in biomedical, phytosanitary, veterinary, feed/food and environmental settings. We describe principles of current formats, applications, limitations and perspectives for quantitative monitoring. We illustrate the potentials and limitations of analysis with lateral flow (immuno)assays using a literature survey and a SWOT analysis (acronym for "strengths, weaknesses, opportunities, threats"). Articles referred to in this survey were searched for on MEDLINE, Scopus and in references of reviewed papers. Search terms included "immunochromatography", "sol particle immunoassay", "lateral flow immunoassay" and "dipstick assay".
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Abstract
The widespread use of gold nanoparticles (GNPs) as labels in diagnostics and detection is due to a unique combination of chemical and physical properties that allow biological molecules to be detected at low concentrations. In this critical review detection methods based on GNPs are divided up and discussed based on the way in which signals are generated in response to specific target molecules. Particular attention is devoted to methods that allow target molecules to be detected with the unaided eye because these, more than any other, harness the full range of properties that make GNPs unique. Methods that are discussed include those in which specific target molecules induce a visible colour change, chromatographic methods that allow non-specialized users to perform sophisticated tests without additional equipment and methods in which trace amounts of GNPs are rendered visible to the unaided eye by catalytic deposition of a metal such as silver. The use of metal deposition as a means of enhancing the signal for optical and electrical detection is also reviewed. The other detection methods included in this review are based on interactions between GNPs and molecules located in close proximity to their surface. These include methods in which light emission from such molecules is enhanced (surface enhanced Raman scattering) or quenched (fluorescence), and methods in which the accumulation of specific target molecules induce subtle changes in the extinction spectra of GNPs that can be followed in real time with inexpensive equipment (166 references).
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Affiliation(s)
- Robert Wilson
- Department of Chemistry, Liverpool University, Liverpool, UK L69 7ZD
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