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New tools of Electrochemistry at the service of (bio)sensing: From rational designs to electrocatalytic mechanisms. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115097] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Sanjaya KC, Ranzoni A, Hung J, Blaskovich MAT, Watterson D, Young PR, Cooper MA. Flow-cytometry detection of fluorescent magnetic nanoparticle clusters increases sensitivity of dengue immunoassay. Anal Chim Acta 2020; 1107:85-91. [PMID: 32200905 DOI: 10.1016/j.aca.2020.02.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 01/03/2020] [Accepted: 02/04/2020] [Indexed: 01/10/2023]
Abstract
We report a flow-cytometry based method capable of detecting a range of analytes by monitoring the analyte-induced clustering of magnetic and fluorescent nanoparticles with flow cytometry. Using the dengue viral antigen (NS1) as an example, antibodies were conjugated to magnetic and fluorescent nanoparticles in a sandwich immunoassay format. These nanoparticles formed clusters when NS1 was present in a sample and the cluster formation was directly proportional to the concentration of antigen. Simultaneous flow cytometry measurement of cluster size, as detected by the forward scatter channel, combined with fluorescence intensity led to a reduction in the assay background signal, resulting in improved analytical sensitivity. We were able to detect 2.5 ng mL-1 of NS1 in serum samples by quantifying the clusters, a two-log fold improvement in the assay limit of detection over total fluorescence quantification alone.
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Affiliation(s)
- K C Sanjaya
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Andrea Ranzoni
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Jacky Hung
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Mark A T Blaskovich
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Daniel Watterson
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia; School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Paul R Young
- School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, 4072, QLD, Australia
| | - Matthew A Cooper
- Institute for Molecular Bioscience, 306 Carmody Road, The University of Queensland, Brisbane, 4072, QLD, Australia.
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Nsabimana A, Ma X, Yuan F, Du F, Abdussalam A, Lou B, Xu G. Nanomaterials-based Electrochemical Sensing of Cardiac Biomarkers for Acute Myocardial Infarction: Recent Progress. ELECTROANAL 2018. [DOI: 10.1002/elan.201800641] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Anaclet Nsabimana
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences No. 19A Yuquanlu; Beijing 100049 People's Republic of China
| | - Xiangui Ma
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
| | - Fan Yuan
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
| | - Fangxin Du
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
| | - Abubakar Abdussalam
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
| | - Baohua Lou
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
| | - Guobao Xu
- State Key Laboratory of Electroanalytical Chemistry; Changchun Institute of Applied Chemistry; Chinese Academy of Sciences; Changchun, Jilin 130022 People's Republic of China
- University of Chinese Academy of Sciences; Chinese Academy of Sciences No. 19A Yuquanlu; Beijing 100049 People's Republic of China
- University of Science and Technology of China Anhui; 230026 People's Republic of China
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