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Wang C, Zhang K, Li D, Zhang X, Gu J, Long J, Cai Y, Bu Y, Sun H, Cai J, Ding Y, Chen D. Development of Colloidal Gold Test Strips for the Detection of Triadimenol Residues in Tobacco. Stud Health Technol Inform 2023; 308:179-190. [PMID: 38007739 DOI: 10.3233/shti230838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
The rapid and accurate determination of triadimenol residues is of great significance. In this study, based on the advantages of high efficiency, rapidity, reliability, simplicity and low cost of immunology, a test strip product for the rapid detection of triadimenol residues in tobacco was designed based on the optimization of conditions such as pH and dosage of diluent, concentration of antibody stock solution, type of confining solution and complex solution, with high specificity, accuracy and The results of 20 samples of fresh and first roasted tobacco were all consistent with the method of gas chromatography, which proved the reliability of the test strips. The detection limit for fresh and roasted tobacco was 5 mg/kg, and the test strips developed in this study are suitable for mass testing of tobacco samples in tobacco-related laboratories because of their short detection time, simple pre-treatment and detection methods, and good application prospects.
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Affiliation(s)
- Chunqiong Wang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Ke Zhang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Dan Li
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Xiaowei Zhang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Jianlong Gu
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Jie Long
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Yongzhan Cai
- Yunnan Tobacco Company Qujing City, Qujing, 655000
| | - Yunhong Bu
- Yunnan Tobacco Company Chuxiong Prefecture, Chuxiong, 675099
| | - Haowei Sun
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Jieyun Cai
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Yishu Ding
- Yunnan Tobacco Company Chuxiong Prefecture, Chuxiong, 675099
| | - Dan Chen
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
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Wang C, Zhang K, Cai Y, Zhang X, Long J, Gu J, Bu Y, Sun H, Li D, Ding Y, Cai J, Chen D. Development of Colloidal Gold Test Strips for the Detection of Oxamyl Residues in Tobacco. Stud Health Technol Inform 2023; 308:168-178. [PMID: 38007738 DOI: 10.3233/shti230837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
In this study, monoclonal antibodies against oxamyl were prepared, and colloidal gold immunochromatography was used to design a rapid test strip product for the detection of oxamyl in tobacco with high specificity, accuracy and stability without cross-reactivity to commonly used tobacco fungicides based on the optimization of conditions such as pH value of diluent, diluent dosage, concentration of antibody marker, type of confining solution and complex solution. 5 The results of five samples of post-harvest ready-to-bake tobacco and first-harvest tobacco were consistent with the gas chromatographic method, which proved the reliability of the test strips. The limits of detection for the post-harvest and first-harvest tobacco samples were 0.1 mg/kg, and the test strips developed in this study are suitable for mass testing in tobacco laboratories with good application prospects because of their short detection time, simple pre-treatment and detection methods.
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Affiliation(s)
- Chunqiong Wang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Ke Zhang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Yongzhan Cai
- Yunnan Tobacco Company Qujing City, Qujing, 655000
| | - Xiaowei Zhang
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Jie Long
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Jianlong Gu
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Yunhong Bu
- Yunnan Tobacco Company Chuxiong Prefecture, Chuxiong, 675099
| | - Haowei Sun
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Dan Li
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Yishu Ding
- Yunnan Tobacco Company Chuxiong Prefecture, Chuxiong, 675099
| | - Jieyun Cai
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
| | - Dan Chen
- Yunnan Provincial Tobacco Quality Supervision and Inspection Station, Kunming, 650106
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Lu C, Li S, Jiang W, Liu Q, Wang X, Yang C, Wang Q. Rapid quantitative detection of chloramphenicol in three food products by lanthanide-labeled fluorescent-nanoparticle immunochromatographic strips. Anal Methods 2022; 14:1705-1714. [PMID: 35438089 DOI: 10.1039/d2ay00291d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A rapid and sensitive fluorescence-based immunochromatographic test (ICT) was successfully developed to determine chloramphenicol (CAP) levels in three food products. In this method, lanthanide fluorescent microspheres were used as a label to detect CAP in food samples within 30 min quantitatively, and the result was displayed on the test strip reader. After optimizing detection conditions, the detection limit (LOD) for the three food products was 0.048-0.073 ng g-1, and the half-maximal inhibitory concentration (IC50) was 0.27 ng mL-1. Six other veterinary drugs were detected using the test strip, and no cross-reactivity was observed, indicating that the specificity of the method was satisfactory. This method was also successfully applied to determine CAP in honey, egg, and fish samples, with recoveries ranging from 78.73% to 121.12%. The results demonstrated that this test strip had high sensitivity and specificity, and could be used for field detection within 30 min.
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Affiliation(s)
- Chunhui Lu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Si Li
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Wei Jiang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Qi Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Xiaomei Wang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Chen Yang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
| | - Quan Wang
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 518 Ziyue Road, Minhang, Shanghai, 200241, PR China.
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Qiao Z, Cai Q, Fu Y, Lei C, Yang W. Visual and quantitative detection of E. coli O157:H7 by coupling immunomagnetic separation and quantum dot-based paper strip. Anal Bioanal Chem 2021; 413:4417-4426. [PMID: 34013400 DOI: 10.1007/s00216-021-03395-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 04/21/2021] [Accepted: 05/06/2021] [Indexed: 10/21/2022]
Abstract
Simple and visual quantitative detection of foodborne pathogens can effectively reduce the outbreaks of foodborne diseases. Herein, we developed a simple and sensitive quantum dot (QD)-based paper device for visual and quantitative detection of Escherichia coli (E. coli) O157:H7 based on immunomagnetic separation and nanoparticle dissolution-triggered signal amplification. In this study, E. coli O157:H7 was magnetically separated and labeled with silver nanoparticles (AgNPs), and the AgNP labels can be converted into millions of Ag ions, which subsequently quench the fluorescence of QDs in the paper strip, which along with the readout can be visualized and quantified by the change in length of fluorescent quenched band. Owing to the high capture efficiency and effective signal amplification, as low as 500 cfu mL-1 of E. coli O157:H7 could be easily detected by naked eyes. Furthermore, this novel platform was successfully applied to detect E. coli O157:H7 in spiked milk samples with good accuracy, indicating its potential in the detection of foodborne pathogens in real samples.
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Affiliation(s)
- Zhaohui Qiao
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China
| | - Qiqi Cai
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China
| | - Yingchun Fu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, Zhejiang, China
| | - Chunyang Lei
- State Key Laboratory of Chem/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, Zhejiang, China.
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, 315800, Zhejiang, China.
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Zheng QY, Li R, Ni M, Ren P, Ji QB, Sun JY, Li JC, Chen JY, Zhang GQ. What Is the Optimal Timing for Reading the Leukocyte Esterase Strip for the Diagnosis of Periprosthetic Joint Infection? Clin Orthop Relat Res 2021; 479:1323-1330. [PMID: 33492869 PMCID: PMC8133206 DOI: 10.1097/corr.0000000000001609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 11/24/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND The leucocyte esterase (LE) strip test often is used to diagnose periprosthetic joint infection (PJI). In accordance with the manufacturer's directions, the LE strip test result is read 3 minutes after exposing it to joint fluid, but this has not been supported by robust research. Moreover, we have noted that the results of the LE strip test might change over time, and our previous studies have found that centrifugation causes the results of the LE strip test to degrade. Still, there is no evidence-based recommendation as to when to read the LE strip test to maximize diagnostic accuracy, in general, and the best reading times for the LE strip test before and after centrifugation need to be determined separately, in particular. QUESTIONS/PURPOSES (1) What is the optimal timing for reading LE strip test results before centrifugation to diagnose PJI? (2) What is the optimal timing for reading LE strip test results after centrifugation to diagnose PJI? METHODS This study was a prospective diagnostic trial. In all, 120 patients who were scheduled for revision arthroplasty and had signs of infection underwent joint aspiration in the outpatient operating room between July 2018 and July 2019 and were enrolled in this single-center study. For inclusion, patients must have had a diagnosis of PJI or nonPJI, valid synovial fluid samples, and must not have received antibiotics within 2 weeks before arthrocentesis. As such, 36 patients were excluded; 84 patients were included for analysis, and all 84 patients agreed to participate. The 2018 International Consensus Meeting Criteria (ICM 2018) was used for the classification of 49 patients with PJI (score ≥ 6) and 35 without PJI (score ≤ 2). The classification was used as the standard against which the different timings for reading LE strips were compared. All patients without PJI were followed for more than 1 year, during which they did not report the occurrence of PJI. All patients were graded against the diagnostic criteria regardless of their LE strip test results. In 83 patients, one drop of synovial fluid (50 μL) was applied to LE strips before and after centrifugation, and in one patient (without PJI), the sample was not centrifuged because the sample volume was less than 1.5 mL. The results of the strip test were read on an automated colorimeter. Starting from 1 minute after centrifugation, these strips were automatically read once every minute, 15 times (over a period of 16 minutes), and the results were independently recorded by two observers. Results were rated as negative, ±, 1+, and 2+ upon the machine reading. Grade 2+ (dark purple) was used as the threshold for a positive result. An investigator who was blinded to the study performed the statistics. Optimal timing for reading the LE strip before and after centrifugation was determined by using receiver operative characteristic (ROC) analysis. The specificity, sensitivity, and positive predictive and negative predictive values were calculated for key timepoints. RESULTS Before centrifugation, the area under the curve was the highest when the results were read at 5 minutes (0.90 [95% CI 0.83 to 0.98]; sensitivity 0.88 [95% CI 0.75 to 0.95]; specificity 0.89 [95% CI 0.72 to 0.96]). After centrifugation, the area under the curve was the highest when the results were read at 10 minutes (0.92 [95% CI 0.86 to 0.98]; sensitivity 0.65 [95% CI 0.50 to 0.78]; specificity 0.97 [95% CI 0.83 to 1.00]). CONCLUSION The LE strip test results are affected by time and centrifugation. For samples without centrifugation, we found that 5 minutes after application was the best time to read LE strips. We cannot deny the use of centrifuges because this is an effective way to solve the sample-mingling problem at present. We recommend 10 minutes postapplication as the most appropriate time to read LE strips after centrifugation. Multicenter and large-sample size studies are warranted to further verify our conclusion. LEVEL OF EVIDENCE Level II, diagnostic study.
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Affiliation(s)
- Qing-yuan Zheng
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Rui Li
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Ming Ni
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Peng Ren
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Quan-bo Ji
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Jing-yang Sun
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Jun-cheng Li
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Ji-ying Chen
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
| | - Guo-qiang Zhang
- Q.-Y. Zheng, J.-Y. Sun, J.-C. Li, Medical School of Chinese People’s Liberation Army General Hospital, Beijing, China
- Q.-Y. Zheng, M. Ni, P. Ren, Q.-B. Ji, J.-Y. Sun, J-C. Li, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the First Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
- R. Li, M. Ni, J.-Y. Chen, G.-Q. Zhang, Department of Orthopedics, the Fourth Medical Center, Chinese People’s Liberation Army General Hospital, Beijing, China
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Wang Z, Zheng Z, Hu H, Zhou Q, Liu W, Li X, Liu Z, Wang Y, Ma Y. A point-of-care selenium nanoparticle-based test for the combined detection of anti-SARS-CoV-2 IgM and IgG in human serum and blood. Lab Chip 2020; 20:4255-4261. [PMID: 33064114 DOI: 10.1039/d0lc00828a] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
COVID-19 is a widespread and highly contagious disease in the human population. COVID-19 is caused by SARS-CoV-2 infection. There is still a great demand for point-of-care tests for detection, epidemic prevention and epidemiological investigation, both now and after the epidemic. We present a lateral flow immunoassay kit based on a selenium nanoparticle-modified SARS-CoV-2 nucleoprotein, which detects anti-SARS-CoV-2 IgM and anti-SARS-CoV-2 IgG in human serum, and the results can be read by the naked eye in 10 minutes. We expressed and purified the SARS-CoV-2 nucleoprotein in HEK293 cells, with a purity of 98.14% and a concentration of 5 mg mL-1. Selenium nanoparticles were synthesized by l-ascorbic acid reduction of seleninic acid at room temperature. After conjugation with the nucleoprotein, a lateral flow kit was successfully prepared. The IgM and IgG detection limits of the lateral flow kit reached 20 ng mL-1 and 5 ng mL-1, respectively, in human serum. A clinical study sample comprising 90 COVID-19-diagnosed patients and 263 non-infected controls was used to demonstrate a sensitivity and specificity of 93.33% and 97.34%, respectively, based on RT-PCR and clinical results. No cross-reactions with rheumatoid factor and positive serum for anti-nuclear antibodies, influenza A, and influenza B were observed. Moreover, the lateral flow kit remained stable after storage for 30 days at 37 °C. Our results demonstrate that the selenium nanoparticle lateral flow kit can conveniently, rapidly, and sensitively detect anti-SARS-CoV-2 IgM and IgG in human serum and blood; it can also be suitable for the epidemiological investigation of COVID-19.
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Affiliation(s)
- Zhizeng Wang
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
| | - Zhi Zheng
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
| | - Hangzhan Hu
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
| | - Qianwen Zhou
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
| | - Wei Liu
- The Institute for Disease Prevention and Control of People's Liberation Army, Beijing, 100071, China
| | - Xiaoquan Li
- The First Affiliated Hospital of Henan University, Kaifeng, 475004, China
| | - Zhigang Liu
- The First Affiliated Hospital of Henan University, Kaifeng, 475004, China
| | - Yaohui Wang
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
| | - Yuanfang Ma
- Joint National Laboratory for Antibody Drug Engineering, Key Laboratory of Cellular and Molecular Immunology of Henan Province, School of Basic Medical Sciences, Henan University, Kaifeng, 475004, China.
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Cui F, Zhou HS. Diagnostic methods and potential portable biosensors for coronavirus disease 2019. Biosens Bioelectron 2020; 165:112349. [PMID: 32510340 PMCID: PMC7266610 DOI: 10.1016/j.bios.2020.112349] [Citation(s) in RCA: 215] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 05/26/2020] [Accepted: 06/01/2020] [Indexed: 12/14/2022]
Abstract
Timely detection and diagnosis are urgently needed to guide epidemiological measures, infection control, antiviral treatment, and vaccine research. In this review, biomarkers/indicators for diagnosis of coronavirus disease 2019 (COVID-19) or detection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in the environment are summarized and discussed. It is concluded that the detection methods targeting antibodies are not suitable for screening of early and asymptomatic cases since most patients had an antibody response at about 10 days after onset of symptoms. However, antibody detection methods can be combined with quantitative real-time reverse transcriptase-polymerase chain reaction (RT-qPCR) to significantly improve the sensitivity and specificity of diagnosis, and boost vaccine research. Fast, sensitive and accurate detection methods targeting antigens need to be developed urgently. Various specimens for diagnosis or detection are compared and analyzed. Among them, deep throat saliva and induced sputum are desired for RT-qPCR test or other early detection technologies. Chest computerized tomography (CT) scan, RT-qPCR, lateral flow immunochromatographic strip (LFICS) for diagnosis of COVID-19 are summarized and compared. Specially, potential electrochemical (EC) biosensor, surface enhanced Raman scattering (SERS)-based biosensor, field-effect transistor (FET)-based biosensor, surface plasmon resonance (SPR)-based biosensor and artificial intelligence (AI) assisted diagnosis of COVID-19 are emphasized. Finally, some commercialized portable detection device, current challenges and future directions are discussed.
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Affiliation(s)
- Feiyun Cui
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, United States
| | - H Susan Zhou
- Department of Chemical Engineering, Worcester Polytechnic Institute, 100 Institute Road, Worcester, MA, 01609, United States.
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Li G, Rong Z, Wang S, Zhao H, Piao D, Yang X, Tian G, Jiang H. Rapid detection of brucellosis using a quantum dot-based immunochromatographic test strip. PLoS Negl Trop Dis 2020; 14:e0008557. [PMID: 32976512 PMCID: PMC7540878 DOI: 10.1371/journal.pntd.0008557] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 10/07/2020] [Accepted: 07/02/2020] [Indexed: 11/18/2022] Open
Abstract
Novel diagnostic tools are a major challenge for brucellosis research, especially in developing countries. Herein, we established a handheld quantum dot (QD) immunochromatographic device for the fast detection of brucellosis antibodies in the field. Total bacterial protein extracted from Brucella 104M served as labelling and coating antigen. QD labelling and immunochromatography methods were used to optimise reaction conditions, labelling conditions, reaction temperature and storage temperature. QD test strips were employed to test brucellosis serum to determine their sensitivity, specificity and stability. Test strips were compared with Rose Bengal test, standard agglutination test and colloidal gold immunochromatographic assay. Labelled Brucella total protein displayed good specificity and no cross-reactivity. The concentration of labelled total bacterial protein was 3.9 mg/ml, the coating concentration was 2.0 mg/ ml, and the serum titre with the lowest detection sensitivity was 1:25. The optimal reaction temperature for the test strip was 25-30°C. The test strip was stable after storage at room temperature and the repeatability was high, with a coefficient of variation of 4.0%. After testing 199 serum samples, the sensitivity of the QD test strip was 98.53%, the specificity was 93.57%, and the coincidence rate with the standard agglutination test was 96.98%. The developed QD immunochromatographic method can be used for rapid detection and preliminary screening of brucellosis in the field.
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Affiliation(s)
- Guangqiang Li
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
- Center for Disease Control and Prevention, Western Theater Command, Lanzhou, China
| | - Zhen Rong
- Beijing Institute of Radiation Medicine, Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing, China
| | - Shengqi Wang
- Beijing Institute of Radiation Medicine, Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing, China
| | - Hongyan Zhao
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Dongri Piao
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaowen Yang
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Guozhong Tian
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Hai Jiang
- State Key Laboratory for Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
- * E-mail:
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Vyas G, Bhatt S, Si MK, Jindani S, Suresh E, Ganguly B, Paul P. Colorimetric dual sensor for Cu(II) and tyrosine and its application as paper strips for detection in water and human saliva as real samples. Spectrochim Acta A Mol Biomol Spectrosc 2020; 230:118052. [PMID: 31955120 DOI: 10.1016/j.saa.2020.118052] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
A calix[4]arene based compound incorporating amide and morpholine moieties has been synthesized and its ion recognition property towards metal ions and application of its metal complex towards sensing of amino acids has been investigated. The synthesized compound interacts with Cu2+ with high selectivity and sensitivity (LOD, 0.1 ppb) in aqueous media with instant color change from colorless to yellow without interference from any other metal ions used in this study. The molecular structure of the calix compound (1) has been determined by single crystal X-ray study and the structure of its Cu2+ complex has been established by DFT calculation. The Cu2+ complex of 1 selectively detects tyrosine (LOD, 1.2 ppm) in water with distinct color change and without any interference from other 22 amino acids used in this study. The mechanism for detection of tyrosine with color change is also presented. For easy field application, paper based sensor strips have been prepared by coating compound 1 and its Cu2+ complex on filter paper, which have been used for semi-quantitative measurement of Cu2+ and tyrosine. Compound 1 and its Cu2+ complex have also been used for detection of Cu2+ and tyrosine, respectively in water and human saliva as real samples and satisfactory results are obtained.
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Affiliation(s)
- Gaurav Vyas
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shreya Bhatt
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Mrinal K Si
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sana Jindani
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eringathodi Suresh
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bishwajit Ganguly
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
| | - Parimal Paul
- Analytical and Environmental Science Division & Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364002, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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10
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Abstract
Cannabinoids present a unique set of analytical challenges. An increasing number of states have voted to decriminalize recreational marijuana use, creating a need for new kinds of rapid testing. At the same time, synthetic compounds with activity similar to THC, termed synthetic cannabinoids, have become more prevalent and pose significant health risks. A rapid method capable of detecting both natural and synthetic cannabinoids would be useful in cases of driving under the influence of drugs, where it might not be obvious whether the suspect consumed marijuana, a synthetic cannabinoid, or both. Paper spray mass spectrometry is an ambient ionization technique which allows for the direct ionization of analyte from a biofluid spot on a piece of paper. Natural cannabinoids like THC, however, are labile and rapidly disappear from dried sample spots, making it difficult to detect them at clinically relevant levels. Presented here is a method to concentrate and preserve THC and synthetic cannabinoids in urine and oral fluid on paper for analysis by paper spray mass spectrometry. Sesame seed oil was investigated both as a means of preserving THC and as part of a technique, termed paper strip extraction, wherein urine or oral fluid is flowed through an oil spot on a strip of paper to preconcentrate cannabinoids. This technique preserved THC in dried biofluid samples for at least 27 days at room temperature; paper spray MS/MS analysis of these preserved dried spots was capable of detecting THC and synthetic cannabinoids at low ng/mL concentrations, making it suitable as a rapid screening technique. The technique was adapted to be used with a commercially available autosampler.
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11
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Akter S, Kustila T, Leivo J, Muralitharan G, Vehniäinen M, Lamminmäki U. Noncompetitive Chromogenic Lateral-Flow Immunoassay for Simultaneous Detection of Microcystins and Nodularin. Biosensors (Basel) 2019; 9:E79. [PMID: 31216673 PMCID: PMC6627203 DOI: 10.3390/bios9020079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 06/04/2019] [Accepted: 06/11/2019] [Indexed: 01/29/2023]
Abstract
Cyanobacterial blooms cause local and global health issues by contaminating surface waters. Microcystins and nodularins are cyclic cyanobacterial peptide toxins comprising numerous natural variants. Most of them are potent hepatotoxins, tumor promoters, and at least microcystin-LR is possibly carcinogenic. In drinking water, the World Health Organization (WHO) recommended the provisional guideline value of 1 µg/L for microcystin-LR. For water used for recreational activity, the guidance values for microcystin concentration varies mostly between 4-25 µg/L in different countries. Current immunoassays or lateral flow strips for microcystin/nodularin are based on indirect competitive method, which are generally more prone to sample interference and sometimes hard to interpret compared to two-site immunoassays. Simple, sensitive, and easy to interpret user-friendly methods for first line screening of microcystin/nodularin near water sources are needed for assessment of water quality and safety. We describe the development of a two-site sandwich format lateral-flow assay for the rapid detection of microcystins and nodularin-R. A unique antibody fragment capable of broadly recognizing immunocomplexes consisting of a capture antibody bound to microcystins/nodularin-R was used to develop the simple lateral flow immunoassay. The assay can visually detect the major hepatotoxins (microcystin-LR, -dmLR, -RR, -dmRR, -YR, -LY, -LF -LW, and nodularin-R) at and below the concentration of 4 µg/L. The signal is directly proportional to the concentration of the respective toxin, and the use of alkaline phosphatase activity offers a cost efficient alternative by eliminating the need of toxin conjugates or other labeling system. The easy to interpret assay has the potential to serve as a microcystins/nodularin screening tool for those involved in water quality monitoring such as municipal authorities, researchers, as well as general public concerned of bathing water quality.
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Affiliation(s)
- Sultana Akter
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
| | - Teemu Kustila
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
| | - Janne Leivo
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
| | - Gangatharan Muralitharan
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
- Department of Microbiology, School of Life Sciences, Bharathidasan University, Palkalaiperur, Tiruchirappalli 620024, Tamilnadu, India.
| | - Markus Vehniäinen
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
| | - Urpo Lamminmäki
- Molecular Biotechnology and Diagnostics, Department of Biochemistry, University of Turku, FIN-20520 Turku, Finland.
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12
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Dojder A, Vuljanić D, Špoljarić V, Saračević A, Dukić L, Leniček-Krleža J, Vlašić-Tanasković J, Maradin I, Grzunov A, Šimundić AM. Reporting categories in urine test strip analysis: Croatian survey and call for action. Biochem Med (Zagreb) 2019; 29:020709. [PMID: 31223263 PMCID: PMC6559610 DOI: 10.11613/bm.2019.020709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 04/18/2019] [Indexed: 11/18/2022] Open
Abstract
Introduction In line with the national recommendations, Croatian medical laboratories report urine test strip qualitative analysis results using a categorized scale with defined number of categories. Since concentration ranges for measured analytes have not been provided by national professional authority, it is up to the laboratories to define their own categories. The aim of study was to assess the comparability of concentrations assigned to different categories used in reporting the results of dipstick urinalysis in Croatian laboratories. Material and methods A questionnaire was e-mailed to all Croatian medical laboratories (N = 195). They were asked to provide the number of categories and respective concentrations for each parameter. Data were described as numbers and percentages. Values above the upper reference range limit, which were assigned as normal and/or trace category, were considered as false negative. Results Response rate was 71% (139/195). Seventy percent (98/139) of laboratories report their results with either higher (77/98; 79%) or lower (2/98; 2%) number of categories, relative to the national recommendation, whereas 19/98 (19%) report their results as concentrations. Great heterogeneity of reporting categories was observed. Multiple categories were assigned to same concentrations and there was a large overlap of concentrations for most categories. Considerable proportion of laboratories reported false negative results for ketones (42%), leukocytes (30%) and glucose (21%). Conclusions The concentrations assigned to categories used to report the results of dipstick urinalysis are not comparable among Croatian medical laboratories. There is an urgent need for harmonization and standardization of reporting the results of urine dipstick analysis in Croatia.
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Affiliation(s)
- Ana Dojder
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
- Corresponding author:
| | - Dora Vuljanić
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
| | - Valentina Špoljarić
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
| | - Andrea Saračević
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
| | - Lora Dukić
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
| | - Jasna Leniček-Krleža
- Department of Laboratory Diagnostics, Children’s Hospital Zagreb, Zagreb, Croatia
- Croatian Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatian Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia
| | - Jelena Vlašić-Tanasković
- Department of Laboratory Diagnostics, General Hospital Pula, Pula, Croatia
- Croatian Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatian Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia
| | - Ivana Maradin
- Medical-biochemistry Laboratory “Mirjana Plavetić and Ivana Maradin”, Karlovac, Croatia
- Croatian Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatian Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia
| | - Ana Grzunov
- Department of Laboratory Diagnostics, Children’s Hospital Zagreb, Zagreb, Croatia
- Croatian Centre for Quality Assessment in Laboratory Medicine (CROQALM), Croatian Society of Medical Biochemistry and Laboratory Medicine, Zagreb, Croatia
| | - Ana-Maria Šimundić
- Department of Medical Laboratory Diagnostics, University Hospital “Sveti Duh”, Zagreb, Croatia
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb, Croatia
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Huang WC, Wu KH, Hung HC, Wang JC, Chang SC. Magnetic Nanoparticle-Based Lateral Flow Immunochromatographic Strip as a Reporter for Rapid Detection of Melamine. J Nanosci Nanotechnol 2018; 18:7190-7196. [PMID: 29954557 DOI: 10.1166/jnn.2018.16020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Magnetite nanoparticles (MNPs) Fe3O4 and r-Fe2O3 were surface-modified with poly(ethylene glycol) (PEG) in order to improve their specificity and bioactivity. PEG and the anti-MEL monoclonal antibody (mAb) were successfully immobilized on the surface of MNPs and characterized using FTIR, UV-Vis and TEM analyses. Surface modification of MNPs-PEG-mAb conjugates of a variety of sizes and magnetite types was employed to design and prepare labels for use in a lateral flow immunoassay (LFIA) to test whether the size of the conjugate can affect the performance of the assay. The results showed that the detection limit was mainly determined by the size of the MNPs-PEG-mAb conjugate. Under optimized conditions, a detection limit of 0.4 ppm for melamine was achieved using Fe2O3-PEG-mAb, which was almost 5-fold lower than that of the Fe3O4-PEG-mAb conjugate (2.2 ppm).
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14
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Abstract
RIDA®QUICK Gliadin is an immuno-chromatographic test for the detection of gluten in foods, on surfaces, and in Cleaning-in-Place (CIP) waters. This test kit has been adopted as Final Action AOAC INTERNATIONAL Official Methods of AnalysisSM 2015.16 for gluten in corn products. The assay is based on the monoclonal antibody R5, which recognizes gluten in wheat, barley, and rye. Four different surfaces were contaminated with a gliadin material and analyzed by a direct swabbing of the surface with the dip-stick. The outcome was an LOD95% concentration of the assay between 1.6 and 3.0 μg/100 cm2 gluten. For CIP waters that contain cleansing reagents, 100% positive results were obtained for minimum gluten concentration between 50 and 100 ng/mL. If the CIP water does not contain these reagents, the minimum detectable gluten level is 10 ng/mL. The independent validation study consisted of a method comparison study of recovery from a CIP solution and from a stainless-steel surface. The test kit was evaluated at six different concentration levels for both matrices, with 20 or 30 replicates per concentration level. The probability of detection was calculated for each contamination level. Additionally, the LOD95% concentration was estimated for each matrix analyzed.
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Affiliation(s)
- Markus Lacorn
- R-Biopharm AG, An der neuen Bergstrasse 17, D-64297 Darmstadt, Germany
| | - Thomas Weiss
- R-Biopharm AG, An der neuen Bergstrasse 17, D-64297 Darmstadt, Germany
| | - Nicole Klass
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | - Patrick Bird
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | | | - James Agin
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
| | - David Goins
- Q Laboratories, Inc., 1400 Harrison Ave, Cincinnati, OH 45214
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15
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Zhang S, Zhao S, Wang S, Liu J, Dong Y. Development of Lateral Flow Immunochromatographic Strips for Micropollutant Screening Using Colorants of Aptamer-Functionalized Nanogold Particles, Part II: Experimental Verification with Aflatoxin B1 and Chloramphenicol. J AOAC Int 2018; 101:1408-1414. [PMID: 29743135 DOI: 10.5740/jaoacint.18-0056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lateral flow immunochromatographic strips based on colorants of aptamer-functionalized nanogold particles were developed for the detection of micropollutants aflatoxin B1 (AFB1) and chloramphenicol (CAP). The lateral flow immunochromatographic strip was based on a competitive reaction of thiolated-aptamer between micropollutants and bio-DNA probe-streptavidin as capture material immobilized at the test line. General crucial parameters that might influence the sensitivity have been systematically investigated. To test the effectiveness and applicability of the optimized conditions, two structurally unrelated micropollutants, that is, AFB1 and CAP, were chosen for detection. In the present study, lateral flow immunochromatographic strips for AFB1 and CAP analysis by combining the high selectivity and affinity of aptamers with the unique optical properties of nanogold in municipal water samples were reported for the first time. With the optimized conditions, the immunochromatographic strip showed a visual LOD of 10 ppb and a quantitative LOD of 1.05 ppb using an immunochromatographic reader for AFB1 detection and a quantitative LOD of 63.4 ppb using an immunochromatographic reader for CAP detection. Furthermore, the sensitive strip provided a good linear detection range of approximately 0-50 ppm for AFB1 detection and a wider liner detection range of approximately 0-160 ppm for CAP detection. Moreover, the immunochromatographic strip provided recovery rates for water samples of 90-110% in the AFB1 analysis and 84-108% in the CAP analysis. The results demonstrated that the immunochromatographic strip has excellent potential for wide applicability and verified that the strip methods for the optimized conditions are applicable to a variety of micropollutants. The lateral flow immunochromatographic strip could be used as a simple, rapid, and efficient screening tool for rapid on-site detection of a variety of micropollutants.
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Affiliation(s)
- Shan Zhang
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Shuai Zhao
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Sai Wang
- Ocean University of China, College of Food Science and Engineering, Lab of Nucleic Acid Chemistry and Biotechnology, Qingdao 266003, China
| | - Jiahui Liu
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Yiyang Dong
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
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16
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Zhao S, Zhang S, Wang S, Liu J, Dong Y. Development of Lateral Flow Immunochromatographic Strips for Micropollutants Screening Using Colorants of Aptamer Functionalized Nanogold Particles Part I Methodology and Optimization. J AOAC Int 2018; 101:1402-1407. [PMID: 29724260 DOI: 10.5740/jaoacint.18-0055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A methodology of lateral flow immunochromatographic strip based on aptamer was developed for on-site detection of the small molecule micropollutants. In the present study, we try for the first time to investigate the feasibility of developing a strip assay for the analysis of micropollutants as methodological prototypes by combining the high selectivity and affinity of aptamers with the unique optical properties of nanogolds. This quantitative method was based on the competition for the aptamer between targets and DNA probes. Crucial parameters that might influence the sensitivity, such as the size of nanogolds, amount of aptamer, type and pH of streptavidin, type of nitrocellulose (NC) membrane, blocking procedure, and reading time, were systematically investigated to obtain the optimum assay performance. With the optimized conditions [nanogolds 25 nm, 50 μM aptamer, pH 8 of GSA (a type of streptavidin named "SA Gold," which is a sulfhydrylization streptavidin), Millipore HFC 135 NC membrane, 1% bovine serum albumin as the blocking agent and added in the running buffer and sample pad soakage agents, and 20 min reading time] the aptamer-based lateral flow assay will show a low visual limit of detection and scanning reader LOD. The strip for on-site screening using colorants of aptamer functionalized nanogold particles did not require any complicated equipment and was a potential portable tool for rapid identification of micropollutants.
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Affiliation(s)
- Shuai Zhao
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Shan Zhang
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Sai Wang
- Ocean University of China, College of Food Science and Engineering, Lab of Nucleic Acid Chemistry and Biotechnology, Qingdao 266003, China
| | - Jiahui Liu
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
| | - Yiyang Dong
- Beijing University of Chemical Technology, College of Life Science and Technology, Beijing 100029, People's Republic of China
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17
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Brangel P, Sobarzo A, Parolo C, Miller BS, Howes PD, Gelkop S, Lutwama JJ, Dye JM, McKendry RA, Lobel L, Stevens MM. A Serological Point-of-Care Test for the Detection of IgG Antibodies against Ebola Virus in Human Survivors. ACS Nano 2018; 12:63-73. [PMID: 29303554 DOI: 10.1021/acsnano.7b07021] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Ebola virus disease causes widespread and highly fatal epidemics in human populations. Today, there is still great need for point-of-care tests for diagnosis, patient management and surveillance, both during and post outbreaks. We present a point-of-care test comprising an immunochromatographic strip and a smartphone reader, which detects and semiquantifies Ebola-specific antibodies in human survivors. We developed a Sudan virus glycoprotein monoplex platform and validated it using sera from 90 human survivors and 31 local noninfected controls. The performance of the glycoprotein monoplex was 100% sensitivity and 98% specificity compared to standard whole antigen enzyme-linked immunosorbent assay (ELISA), and it was validated with freshly collected patient samples in Uganda. Moreover, we constructed a multiplex test for simultaneous detection of antibodies against three recombinant Sudan virus proteins. A pilot study comprising 15 survivors and 5 noninfected controls demonstrated sensitivity and specificity of 100% compared to standard ELISA. Finally, we developed a second multiplex subtype assay for the identification of exposure to three related EVD species: Sudan virus, Bundibugyo virus and Ebola virus (formerly Zaire) using recombinant viral glycoprotein. This multiplex test could distinguish between the host's immunity to specific viral species and identify cross-reactive immunity. These developed serological platforms consisted of capture ligands with high specificity and sensitivity, in-house developed strips and a compatible smartphone application. These platforms enabled rapid and portable testing, data storage and sharing as well as geographical tagging of the tested individuals in Uganda. This platform holds great potential as a field tool for diagnosis, vaccine development, and therapeutic evaluation.
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Affiliation(s)
- Polina Brangel
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London , London SW7 2AZ, U.K
| | - Ariel Sobarzo
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev , Beer-Sheva 8410501, Israel
| | - Claudio Parolo
- London Centre for Nanotechnology and Div. of Medicine, University College London , London WC1E 6B, U.K
| | - Benjamin S Miller
- London Centre for Nanotechnology and Div. of Medicine, University College London , London WC1E 6B, U.K
| | - Philip D Howes
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London , London SW7 2AZ, U.K
| | - Sigal Gelkop
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev , Beer-Sheva 8410501, Israel
| | - Julius J Lutwama
- Department of Arbovirology, Emerging and Re-emerging Infection, Uganda Virus Research Institute , Entebbe P.O Box 49, Uganda
| | - John M Dye
- Virology Division, US Army Medical Research Institute of Infectious Diseases , Fort Detrick, Frederick, Maryland 21702, United States
| | - Rachel A McKendry
- London Centre for Nanotechnology and Div. of Medicine, University College London , London WC1E 6B, U.K
| | - Leslie Lobel
- Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev , Beer-Sheva 8410501, Israel
- Department of Arbovirology, Emerging and Re-emerging Infection, Uganda Virus Research Institute , Entebbe P.O Box 49, Uganda
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute for Biomedical Engineering, Imperial College London , London SW7 2AZ, U.K
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18
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Wen-de W, Min L, Ming C, Li-Ping L, Rui W, Hai-Lan C, Fu-Yan C, Qiang M, Wan-Wen L, Han-Zhong C. Development of a colloidal gold immunochromatographic strip for rapid detection of Streptococcus agalactiae in tilapia. Biosens Bioelectron 2016; 91:66-69. [PMID: 27992801 DOI: 10.1016/j.bios.2016.11.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Revised: 11/10/2016] [Accepted: 11/14/2016] [Indexed: 11/17/2022]
Abstract
A colloidal gold immunochromatographic strip was developed for rapid detection of Streptococcus agalactiae (S. agalactiae) infection in tilapia. The monoclonal antibodies (mAb) 4C12 and 3A9 were used to target S. agalactiae as colloidal gold-mAb conjugate and captured antibody, respectively. The colloidal gold immunochromatographic strip was assembled via routine procedures. Optimal pH and minimum antibody levels in the reaction system for gold colloidal-mAb 4C12 conjugation were pH 7.4 and 18μg/mL, respectively. Optimal concentrations of the captured antibody 3A9 and goat anti-mouse antibody were 0.6mg/mL and 2mg/mL, respectively. The sensitivity of the strip for detecting S. agalactiae was 1.5×105 colony forming units (CFU). No cross-reaction was observed with other commonly encountered bacteria, including Pseudomonas fluorescens, Aeromonas hydrophila, Vibrio anguillarum and Streptococcus iniae. The assay time for S. agalactiae was less than 15min. Tilapia samples artificially infected with S. agalactiae were tested using the newly developed strip. The results indicated that blood, brain, kidney, spleen, metanephros and intestine specimens of infected fish can be used for S. agalactiae detection. The validity of the strip was maintained for 6 months at 4°C. These findings suggested that the immunochromatographic strip was effective for spot and rapid detection of S. agalactiae infected tilapia.
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Affiliation(s)
- Wu Wen-de
- Animal Science and Technology College, Guangxi University, 100 Daxue Road, Xixiangtang District, Nanning, Guangxi 530005, China
| | - Li Min
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China
| | - Chen Ming
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China
| | - Li Li-Ping
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China
| | - Wang Rui
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China
| | - Chen Hai-Lan
- Animal Science and Technology College, Guangxi University, 100 Daxue Road, Xixiangtang District, Nanning, Guangxi 530005, China
| | - Chen Fu-Yan
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China
| | - Mi Qiang
- Guangxi Aquaculture and Animal Husbandry School, 7 Qingshan Road, Nanning, Guangxi 530021, China
| | - Liang Wan-Wen
- Guangxi Key Laboratory of Aqua tic Genetic Breeding and Healthy Aquaculture,Guangxi Academy of Fishery Science, 8 Qingshan Road, Nanning, Guangxi 530021 China.
| | - Chen Han-Zhong
- Animal Science and Technology College, Guangxi University, 100 Daxue Road, Xixiangtang District, Nanning, Guangxi 530005, China.
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Guo S, Zhang W, He L, Tan G, Min M, Kyaw MP, Wang B, Cui L. Rapid evaluation of artesunate quality with a specific monoclonal antibody-based lateral flow dipstick. Anal Bioanal Chem 2016; 408:6003-8. [PMID: 26873200 DOI: 10.1007/s00216-016-9363-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/14/2016] [Accepted: 01/25/2016] [Indexed: 11/25/2022]
Abstract
Artesunate is a frontline antimalarial drug for treating Plasmodium falciparum malaria. To produce specific antibodies to artesunate, the carboxyl group of artesunate was directly conjugated to carrier protein as the immunogen. A specific monoclonal antibody (mAb) 3D82G6 against artesunate was obtained by high-throughput screening of positive hybridoma clones. This monoclonal antibody had 4.0, 0.5, and 0.9 % cross reactivities with artemisinin, dihydroartemisinin, and artemether, respectively. A dipstick immunoassay was developed, and the indicator range for artesunate was 1000-2000 ng mL(-1). No interference was observed with artemisinin, dihydroartemisinin, artemether, and other commonly used antimalarial drugs for up to 20,000 ng mL(-1). The dipsticks were used for determination of artesunate contents in commercial drugs, and the results were agreeable with those determined by high-performance liquid chromatography. This dipstick, with its specificity and sensitivity for artesunate and simplicity to use, makes it a potential point-of-care device for rapid quality evaluation of artesunate-containing antimalarial drugs. Graphical Abstract Specific monoclonal antibody-based lateral flow dipstick for artesunate.
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Affiliation(s)
- Suqin Guo
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Wei Zhang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Lishan He
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Guiyu Tan
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Myo Min
- Myanmar Medical Association, No. 249, Thein Phyu Road, Mingalartaungnyunt Township, Yangon, Myanmar
| | - Myat Phone Kyaw
- Department of Medical Research, Ministry of Health, No. 5, Ziwaka Road, Dagon Township, Yangon, Myanmar
| | - Baomin Wang
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China.
| | - Liwang Cui
- Department of Entomology, Pennsylvania State University, University Park, PA, 16802, USA.
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20
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Su X, Guo L, Ma Y, Li X. A mercuric ensemble based on a cycloruthenated complex as a visual probe for iodide in aqueous solution. Spectrochim Acta A Mol Biomol Spectrosc 2016; 152:468-474. [PMID: 26253438 DOI: 10.1016/j.saa.2015.07.087] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 05/22/2015] [Accepted: 07/23/2015] [Indexed: 06/04/2023]
Abstract
A new water-soluble cycloruthenated complex Ru(bthiq)(dcbpy)2(+) (1, Hbthiq=1-(2-benzo[b]thiophenyl)isoquinoline, dcbpy=4,4'-dicarboxylate-2,2'-bipyridine) was designed and synthesized to form its mercuric ensemble (1-Hg(2+)) to achieve visual detection of iodide anions. The binding constant of 1-Hg(2+) is calculated to be 2.40×10(4)M(-1), which is lower than that of HgI2. Therefore, the addition of I(-) to the aqueous solution of 1-Hg(2+)lead to significant color changes from yellow to deep-red by the release of 1. The results showed that iodide anions could be easily detected by the naked eyes. The detection limit of iodide anion is calculated as 0.77μM. In addition, an easily-prepared test strip of 1-Hg(2+) was obtained successfully to detect iodide anions.
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Affiliation(s)
- Xianlong Su
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Lieping Guo
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Yajuan Ma
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China
| | - Xianghong Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan 430074, China.
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21
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Choi JR, Hu J, Feng S, Wan Abas WAB, Pingguan-Murphy B, Xu F. Sensitive biomolecule detection in lateral flow assay with a portable temperature-humidity control device. Biosens Bioelectron 2015; 79:98-107. [PMID: 26700582 DOI: 10.1016/j.bios.2015.12.005] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/30/2015] [Accepted: 12/04/2015] [Indexed: 12/30/2022]
Abstract
Lateral flow assays (LFAs) have currently attracted broad interest for point-of-care (POC) diagnostics, but their application has been restricted by poor quantification and limited sensitivity. While the former has been currently solved to some extent by the development of handheld or smartphone-based readers, the latter has not been addressed fully, particularly the potential influences of environmental conditions (e.g., temperature and relative humidity (RH)), which have not yet received serious attention. The present study reports the use of a portable temperature-humidity control device to provide an optimum environmental requirement for sensitivity improvement in LFAs, followed by quantification by using a smartphone. We found that a RH beyond 60% with temperatures of 55-60°C and 37-40°C produced optimum nucleic acid hybridization and antigen-antibody interaction in LFAs, respectively representing a 10-fold and 3-fold signal enhancement over ambient conditions (25°C, 60% RH). We envision that in the future the portable device could be coupled with a fully integrated paper-based sample-to-answer biosensor for sensitive detection of various target analytes in POC settings.
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Affiliation(s)
- Jane Ru Choi
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia; 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; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - 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; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Shangsheng Feng
- 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; MOE Key Laboratory for Multifunctional Materials and Structures (LMMS), School of Aerospace, Xi'an Jiaotong University, Xi'an, PR China; State Key Laboratory of Mechanical Structure Strength and Vibration, School of Aerospace, Xi'an Jiaotong University, Xi'an, PR China
| | - 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; Bioinspired Engineering and Biomechanics Center (BEBC), Xi'an Jiaotong University, Xi'an 710049, PR China.
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Chen A, Yang S. Replacing antibodies with aptamers in lateral flow immunoassay. Biosens Bioelectron 2015; 71:230-242. [PMID: 25912679 DOI: 10.1016/j.bios.2015.04.041] [Citation(s) in RCA: 326] [Impact Index Per Article: 36.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 04/12/2015] [Accepted: 04/13/2015] [Indexed: 12/30/2022]
Abstract
Aptamers have been identified against various targets as a type of chemical or nucleic acid ligand by systematic evolution of ligands by exponential enrichment (SELEX) with high sensitivity and specificity. Aptamers show remarkable advantages over antibodies due to the nucleic acid nature and target-induced structure-switching properties and are widely used to design various fluorescent, electrochemical, or colorimetric biosensors. However, the practical applications of aptamer-based sensing and diagnostics are still lagging behind those of antibody-based tests. Lateral flow immunoassay (LFIA) represents a well established and appropriate technology among rapid assays because of its low cost and user-friendliness. The antibody-based platform is utilized to detect numerous targets, but it is always hampered by the antibody preparation time, antibody stability, and effect of modification on the antibody. Seeking alternatives to antibodies is an area of active research and is of tremendous importance. Aptamers are receiving increasing attention in lateral flow applications because of a number of important potential performance advantages. We speculate that aptamer-based LFIA may be one of the first platforms for commercial use of aptamer-based diagnosis. This review first gives an introduction to aptamer including the selection process SELEX with its focus on aptamer advantages over antibodies, and then depicts LFIA with its focus on aptamer opportunities in LFIA over antibodies. Furthermore, we summarize the recent advances in the development of aptamer-based lateral flow biosensing assays with the aim to provide a general guide for the design of aptamer-based lateral flow biosensing assays.
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Affiliation(s)
- Ailiang Chen
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China.
| | - Shuming Yang
- Institute of Quality Standards and Testing Technology for Agro-products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China; Key Laboratory of Agri-food Quality and Safety, Ministry of Agriculture, Beijing 100081, China
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Gomes HIAS, Sales MGF. Development of paper-based color test-strip for drug detection in aquatic environment: Application to oxytetracycline. Biosens Bioelectron 2014; 65:54-61. [PMID: 25461138 DOI: 10.1016/j.bios.2014.10.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Revised: 09/24/2014] [Accepted: 10/01/2014] [Indexed: 11/19/2022]
Abstract
The wide use of antibiotics in aquaculture has led to the emergence of resistant microbial species. It should be avoided/minimized by controlling the amount of drug employed in fish farming. For this purpose, the present work proposes test-strip papers aiming at the detection/semi-quantitative determination of organic drugs by visual comparison of color changes, in a similar analytical procedure to that of pH monitoring by universal pH paper. This is done by establishing suitable chemical changes upon cellulose, attributing the paper the ability to react with the organic drug and to produce a color change. Quantitative data is also enabled by taking a picture and applying a suitable mathematical treatment to the color coordinates given by the HSL system used by windows. As proof of concept, this approach was applied to oxytetracycline (OXY), one of the antibiotics frequently used in aquaculture. A bottom-up modification of paper was established, starting by the reaction of the glucose moieties on the paper with 3-triethoxysilylpropylamine (APTES). The so-formed amine layer allowed binding to a metal ion by coordination chemistry, while the metal ion reacted after with the drug to produce a colored compound. The most suitable metals to carry out such modification were selected by bulk studies, and the several stages of the paper modification were optimized to produce an intense color change against the concentration of the drug. The paper strips were applied to the analysis of spiked environmental water, allowing a quantitative determination for OXY concentrations as low as 30ng/mL. In general, this work provided a simple, method to screen and discriminate tetracycline drugs, in aquaculture, being a promising tool for local, quick and cheap monitoring of drugs.
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Affiliation(s)
- Helena I A S Gomes
- BioMark, Sensor Research, School of Engineering of the Polytechnique Institute of Porto, Portugal; Industrial Laborum Ibérica, Lab Integrated Systems, Portugal
| | - M Goreti F Sales
- BioMark, Sensor Research, School of Engineering of the Polytechnique Institute of Porto, Portugal.
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24
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Lo C, Chin LT, Chu CS, Wang YT, Chan KW, Yang WC. Rapid immune colloidal gold strip for cetacean meat restraining illegal trade and consumption: implications for conservation and public health. PLoS One 2013; 8:e60704. [PMID: 23556001 PMCID: PMC3610871 DOI: 10.1371/journal.pone.0060704] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2012] [Accepted: 03/01/2013] [Indexed: 11/18/2022] Open
Abstract
The consumption of cetacean meat is geographically common and often of undetermined sustainability. Besides, it can expose humans to contaminants and zoonotic pathogens. The illegality of possessing cetacean meat was likely under-reported in some countries due to lack of attention paid by the officials although DNA analysis of market products helped to show such practices. We developed two monoclonal antibodies against synthetic peptides of myoglobin (Mb) for constructing a rapid immune colloidal gold strip. Only cetacean Mb is capable of binding to both antibodies and presents positive signal while the Mb from other animals can bind only 1 of the antibodies and presents negative result. The strip for cetacean meat would be an applicable and cost-effective test for field inspectors and even the general public. It contributes to increase the reporting capacity and coverage of illegal cetacean meat possession, which has implications for global cetacean conservation and public health.
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Affiliation(s)
- Chieh Lo
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan (R.O.C.)
| | - Li-Te Chin
- Department of Microbiology, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi, Taiwan (R.O.C.)
| | - Chi-Shih Chu
- Department of Microbiology, Immunology and Biopharmaceuticals, National Chiayi University, Chiayi, Taiwan (R.O.C.)
| | - Yu-Ting Wang
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan (R.O.C.)
| | - Kun-Wei Chan
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan (R.O.C.)
| | - Wei-Cheng Yang
- Department of Veterinary Medicine, National Chiayi University, Chiayi, Taiwan (R.O.C.)
- * E-mail:
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Baumstark A, Pleus S, Schmid C, Link M, Haug C, Freckmann G. Lot-to-lot variability of test strips and accuracy assessment of systems for self-monitoring of blood glucose according to ISO 15197. J Diabetes Sci Technol 2012; 6:1076-86. [PMID: 23063033 PMCID: PMC3570841 DOI: 10.1177/193229681200600511] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Accurate and reliable blood glucose (BG) measurements require that different test strip lots of the same BG monitoring system provide comparable measurement results. Only a small number of studies addressing this question have been published. METHODS In this study, four test strip lots for each of five different BG systems [Accu-Chek® Aviva (system A), FreeStyle Lite® (system B), GlucoCheck XL (system C), Pura™/mylife™ Pura (system D), and OneTouch® Verio™ Pro (system E)] were evaluated with procedures according to DIN EN ISO 15197:2003. The BG system measurement results were compared with the manufacturer's measurement procedure (glucose oxidase or hexokinase method). Relative bias according to Bland and Altman and system accuracy according to ISO 15197 were analyzed. A BG system consists of the BG meter itself and the test strips. RESULTS The maximum lot-to-lot difference between any two of the four evaluated test strip lots per BG system was 1.0% for system E, 2.1% for system A, 3.1% for system C, 6.9% for system B, and 13.0% for system D. Only two systems (systems A and B) fulfill the criteria of DIN EN ISO 15197:2003 with each test strip lot. CONCLUSIONS Considerable lot-to-lot variability between test strip lots of the same BG system was found. These variations add to other sources of inaccuracy with the specific BG system. Manufacturers should regularly and effectively check the accuracy of their BG meters and test strips even between different test strip lots to minimize risk of false treatment decisions.
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Affiliation(s)
- Annette Baumstark
- Institut für Diabetes-Technologie Forschungs- und Entwicklungsgesellschaft mbH an der Universität Ulm, Ulm, Germany.
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Ng R, Koo S, Johnston R. Multicenter evaluation of bacterial contamination of glucose test strips. Clin Chim Acta 2012; 413:1485-7. [PMID: 22728213 DOI: 10.1016/j.cca.2012.06.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Revised: 06/12/2012] [Accepted: 06/12/2012] [Indexed: 11/15/2022]
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Zhao Y, Zhang G, Liu Q, Teng M, Yang J, Wang J. Development of a lateral flow colloidal gold immunoassay strip for the rapid detection of enrofloxacin residues. J Agric Food Chem 2008; 56:12138-12142. [PMID: 19053394 DOI: 10.1021/jf802648z] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A rapid immunochromatographic lateral flow test strip of competitive format has been developed using a gold-conjugated monoclonal antibody for the specific determination of enrofloxacin (ENR) residues in chicken muscles. For this purpose, a specific monoclonal antibody (mAb) for ENR was generated and characterized. The mAb showed negligible cross-reactivity with other related compounds. Using ENR standards prepared in chicken muscle extracts from 0 to 24.3 ng/mL (microg/kg), the method indicated that the detection limit of the test strip, as measured in a strip scanner, was as low as 0.138 microg/kg of ENR and the half-maximal inhibition concentration (IC(50)) was 0.935 microg/kg. For samples spiked at 10, 20, and 30 microg/kg, the recovery was between 85.3 and 96.1% and the coefficient of variation [CV (%)] was between 4.5 and 7.91%. Parallel analysis of muscle samples from chickens fed ENR showed good comparable results obtained from the test strip and LC-MS. Each test requires 5-10 min. The data indicate that the method has high sensitivity, specificity, and the advantages of simplicity and speed of performance. Therefore, the test strip provides a useful screening method for quantitative, semiquantitative, or qualitative detection of ENR residues in chicken muscles.
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Affiliation(s)
- Yinli Zhao
- The Provincial Key Laboratory of Animal Immunology, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
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Shariff Z, Lam WL, Lambert ME. Leakage following anastomosis. Surgeon 2005; 3:300. [PMID: 16121780 DOI: 10.1016/s1479-666x(05)80097-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
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Dary CC, Blancato JN, Saleh MA. Chemomorphic analysis of malathion in skin layers of the rat: implications for the use of dermatopharmacokinetic tape stripping in exposure assessment to pesticides. Regul Toxicol Pharmacol 2001; 34:234-48. [PMID: 11754528 DOI: 10.1006/rtph.2001.1462] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The dermatopharmacokinetic (DPK) method of dermal tape stripping may prove to be a valuable addition to risk assessment protocols for toxic substances as it has been for the assessment of bioequivalence and bioavailability of topical dermatologic drugs. The measurement of drug penetration into stratum corneum (SC) with respect to time is thought to be comparable with drug distribution in underlying tissues. To examine this possibility, the dermal penetration and absorption characteristics of [(14)C]malathion in the Sprague-Dawley rat was examined by three analytical techniques. [(14)C]Malathion was applied in different vehicles for 30-min and 1-h periods of exposure. Penetration into the SC was assessed by tape stripping followed by instant electronic autoradiography (IEA). Also, the (14)C activity retained in three successive 16 microm sections of the skin application site was determined by IEA and malathion was identified by Fourier transform infrared microscopy (FTIR microscopy). Absorbed [(14)C]malathion was measured in selected tissues, organs, and the residual carcass by liquid scintillation counting (LSC). Penetration into the SC followed a linear trend. The capacity of the SC reservoir for malathion amounted to approximately 1% of the dermal dose, while approximately 6% of the dose was absorbed. Results from this study support the view that LSC remains the method of choice to efficiently and reliably quantify absorption of a radiolabeled test substance. IEA offers the ability of the user to visualize the extent and profile of dermal absorption. When IEA is combined with FTIR microscopy, an effectual tool for studying the penetration of chemicals into layers of the skin emerges. The combined use of the three analytical techniques can be used to test the validity of the DPK method in hazard evaluation and exposure assessment of the organophosphorus insecticides.
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Affiliation(s)
- C C Dary
- United States Environmental Protection Agency, National Exposure Research Laboratory, Las Vegas, NV 89119, USA
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