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Broto M, Salvador JP, Galve R, Marco MP. Biobarcode assay for the oral anticoagulant acenocoumarol. Talanta 2017; 178:308-314. [PMID: 29136827 DOI: 10.1016/j.talanta.2017.09.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 08/29/2017] [Accepted: 09/02/2017] [Indexed: 12/28/2022]
Abstract
A novel approach for therapeutic drug monitoring of oral anticoagulants (OA) in clinical samples is reported, based on a NP-based biobarcode assay. The proposed strategy uses specific antibodies for acenocumarol (ACL) covalently bound to magnetic particles (pAb236-MP) and a bioconjugate competitor (hACL-BSA) linked to encoded polystyrene probes (hACL-BSA-ePSP) on a classical competitive immunochemical format. By using this scheme ACL can be detected in low nM range (LOD, 0.96 ± 0.26, N = 3, in buffer) even in complex samples such as serum or plasma (LOD 4 ± 1). The assay shows a high reproducibility (%CV 1.1 day-to-day) and is robust, as it is demonstrated by the fact that ACL can be quantified in complex biological samples with a very good accuracy (slope = 0.97 and R2 = 0.91, of the linear regression obtained when analyzing spiked vs measured values). Moreover, we have demonstrated that the biobarcode approach has the potential to overcome one of the main challenges of the multiplexed diagnostic, which is the possibility to measure in a single run biomarker targets present at different concentration ranges. Thus, it has been proven that the signal and the detectability can be modulated by just modifying the oligonucleotide load of the encoded probes. This fact opens the door for combining in the same assay encoded probes with the necessary oligonucleotide load to achieve the detectability required for each biomarker target.
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Affiliation(s)
- Marta Broto
- Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia of the Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - J Pablo Salvador
- Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia of the Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Roger Galve
- Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia of the Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain.
| | - M Pilar Marco
- Nanobiotechnology for Diagnostics (Nb4D), Institute for Advanced Chemistry of Catalonia of the Spanish Council for Scientific Research (IQAC-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain; CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, 08034 Barcelona, Spain
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Yang B, Zhang Y, Chen B, He M, Hu B. Elemental-tagged immunoassay combined with inductively coupled plasma mass spectrometry for the detection of tumor cells using a lead sulfide nanoparticle label. Talanta 2017; 167:499-505. [DOI: 10.1016/j.talanta.2017.02.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 02/20/2017] [Accepted: 02/26/2017] [Indexed: 12/22/2022]
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Ni Y, Liu C, Chen J, Chen Q, Zhu X, Dou X. Effective length calibration method for processing the fluorescence signal detected by charge-coupled device in capillary electrophoresis. J Sep Sci 2017; 40:2054-2061. [PMID: 28252250 DOI: 10.1002/jssc.201601458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Revised: 02/18/2017] [Accepted: 02/19/2017] [Indexed: 01/05/2023]
Abstract
A novel method named effective length calibration method has been developed to process the fluorescence signal detected by charge-coupled device during capillary electrophoresis. The new method treated each pixel as an individual point detector, and effectively binned a large number of pixels into a final electropherogram without losing the narrow detection window defined by a single pixel. Capillary electrophoresis separations of DNA were carried out and detected by charge-coupled device and conventional detector (photomultiplier tube). Detection properties including signal-to-noise ratio, peak width, detection frequency, and tilt of detector were investigated. It was found that the new method achieved much higher signal-to-noise ratio and smaller peak width than the conventional detector did. A Detection width of 0.5 μm was easily achieved.
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Affiliation(s)
- Yi Ni
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P.R. China
| | - Chenchen Liu
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P.R. China
| | - Jin Chen
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P.R. China
| | - Qinmiao Chen
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P.R. China
| | - Xifang Zhu
- School of Optoelectronic Engineering, ChangZhou Institute of Technology, Changzhou, Jiangsu, P.R. China
| | - Xiaoming Dou
- Institute of Photonics and Bio-medicine, Graduate School of Science, East China University of Science and Technology, Shanghai, P.R. China.,School of Optoelectronic Engineering, ChangZhou Institute of Technology, Changzhou, Jiangsu, P.R. China
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Xie X, Li F, Zhang H, Lu Y, Lian S, Lin H, Gao Y, Jia L. EpCAM aptamer-functionalized mesoporous silica nanoparticles for efficient colon cancer cell-targeted drug delivery. Eur J Pharm Sci 2015; 83:28-35. [PMID: 26690044 DOI: 10.1016/j.ejps.2015.12.014] [Citation(s) in RCA: 118] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 12/03/2015] [Accepted: 12/08/2015] [Indexed: 01/06/2023]
Abstract
Targeted delivery of anticancer agents by functional nanoparticles is an attractive strategy to increase their therapeutic efficacy while reducing toxicity. In this work, doxorubicin (DOX)-loaded mesoporous silica nanoparticles (MSNs) were modified with aptamer (Ap) against the epithelial cell adhesion molecule (EpCAM) for targeted delivery of DOX to colon cancer cells. These nanoparticles (Ap-MSN-DOX) were characterized by particle size, zeta potential, aptamer conjugation efficiency, drug encapsulation efficiency, and drug release properties. The in vitro cell recognition, cellular uptake, EpCAM protein inhibition efficiency, and cytotoxicity of Ap-MSN-DOX were also studied. Results demonstrated that EpCAM conjugation increased binding of Ap-MSN-DOX to EpCAM over-expressing SW620 colon cancer cells but not EpCAM-negative Ramos cells, resulting in enhanced cellular uptake and increased cytotoxicity of the DOX in SW620 cells when compared to non-Ap-modified nanoparticles (MSN-DOX). Additionally, Ap-MSN-DOX exhibited significant inhibition effects on the expression of EpCAM on SW620 cells. These results suggested that Ap-MSN-DOX has the potential for the targeted delivery of therapeutic agents into EpCAM positive colon cancer cells to improve therapeutic index while reducing side effects.
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Affiliation(s)
- Xiaodong Xie
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Fengqiao Li
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Huijuan Zhang
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Yusheng Lu
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Shu Lian
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Hang Lin
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China
| | - Yu Gao
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
| | - Lee Jia
- Cancer Metastasis Alert and Prevention Center, and Pharmaceutical Photocatalysis of State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350002, China.
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