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Shi Y, Fan J, Li N, Lv Y, Yu S, Zhang Y, Ye Y, Wu R, Shen H, Li LS. Tailored different sizes of quantum dot nanobeads for sensitive and quantitative detection based on the competition fluorescence-linked immunosorbent assay platform. Talanta 2024; 276:126296. [PMID: 38795648 DOI: 10.1016/j.talanta.2024.126296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 04/23/2024] [Accepted: 05/20/2024] [Indexed: 05/28/2024]
Abstract
Highly stable and multicolor photoluminescent (PL) quantum dots (QDs) have attracted widespread attention as ideal probe materials in the field of in vitro diagnostics (IVD), especially the fluorescence-linked immunosorbent assay (FLISA), due to their advantages of high-throughput, high stability, and high sensitivity. However, the size of QDs as fluorescent probes have significant effects on antigen-antibody performance. Therefore, it is critical to design suitable QDs for obtain excellent quantitative detection-based biosensors. In this paper, we prepared different sizes of aqueous QDs (30 nm, 116 nm, 219 nm, and 320 nm) as fluorescent probes to optimize the competitive FLISA platform. The SARS-CoV-2 neutralizing antibody (NTAB) assay was used as an example, and it was found that the size of the QDs has a significant impact on the antigen-antibody binding efficiency and detection sensitivity in competitive FLISA platform. The results showed that these QD nanobeads (QBs, ∼219 nm) could be used as a labeled probe for competitive FLISA, with half-maximal inhibitory concentration (IC50) of 1.34 ng/mL and limit of detection (LOD) of 0.21 pg/mL for NTAB detection. More importantly, the results showed good specificity and accuracy, and the QB219 probe was able to efficiently bind NTAB without interference from other substances in the serum. Given the above advantages, the nanoprobe material (∼200 nm) offers considerable potential as a competitive FLISA platform in the field of IVD.
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Affiliation(s)
- Yangchao Shi
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Jinjin Fan
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Ning Li
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Yanbing Lv
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
| | - Shenping Yu
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Yuning Zhang
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Yingli Ye
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Ruili Wu
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Huaibin Shen
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China
| | - Lin Song Li
- Key Lab for Special Functional Materials of Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
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Chikkanayakanahalli Mukunda D, Rodrigues J, Chandra S, Mazumder N, Vitkin A, Kishore Mahato K. Protein classification by autofluorescence spectral shape analysis using machine learning. Talanta 2024; 267:125167. [PMID: 37714041 DOI: 10.1016/j.talanta.2023.125167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2023] [Revised: 08/23/2023] [Accepted: 09/04/2023] [Indexed: 09/17/2023]
Abstract
Depending on the relative numbers and spatial arrangement of Tryptophan (Trp; W) and Tyrosine (Tyr; Y) residues, different proteins produce distinct autofluorescence (AF) spectral shapes when excited at ∼280 nm. Yet, considering the vast number and heterogeneous forms in nature, visual analysis and precise identification of proteins based on their AF spectra is challenging and further compounded in cases when different proteins produce substantially similar AF spectral shapes. There is, thus, a serious need to develop a methodology to address this problem. The current study proposes a practical technology to quickly identify proteins using machine learning (ML) algorithms based on their AF spectra. Specifically, AF spectra of fifteen different standard proteins of varying origin with distinct structural and Trp/Tyr compositions were recorded; based on the spectral features selected by the Minimum-Redundancy-Maximum-Relevance (mRMR) algorithm, a multiclass Support Vector Machine (SVM) learning model with Radial Basis Function (RBF), Polynomial, and Linear kernels classified the proteins with high accuracy of 99.06%, 99.03%, and 98.29% respectively. Since protein identification is the key to understand biological functions and disease diagnosis, the proposed methodology could offer a viable alternative to and improve the existing protein identification techniques.
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Affiliation(s)
| | - Jackson Rodrigues
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Subhash Chandra
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Nirmal Mazumder
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
| | - Alex Vitkin
- Department of Medical Biophysics, University of Toronto, Toronto, Ontario, M5G 1L7, Canada
| | - Krishna Kishore Mahato
- Department of Biophysics, Manipal School of Life Sciences, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India.
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Lv Y, Fan J, Zhao M, Wu R, Li LS. Recent advances in quantum dot-based fluorescence-linked immunosorbent assays. NANOSCALE 2023; 15:5560-5578. [PMID: 36866747 DOI: 10.1039/d2nr07247e] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Fluorescence immunoassays have been given considerable attention among the quantitative detection methods in the clinical medicine and food safety testing fields. In particular, semiconductor quantum dots (QDs) have become ideal fluorescent probes for highly sensitive and multiplexed detection due to their unique photophysical properties, and the QD fluorescence-linked immunosorbent assay (FLISA) with high sensitivity, high accuracy, and high throughput has been greatly developed recently. In this manuscript, the advantages of applying QDs to FLISA platforms and some strategies for their application to in vitro diagnostics and food safety are discussed. Given the rapid development of this field, we classify these strategies based on the combination of QD types and detection targets, including traditional QDs or QD micro/nano-spheres-FLISA, and multiple FLISA platforms. In addition, some new sensors based on the QD-FLISA are introduced; this is one of the hot spots in this field. The current focus and future direction of QD-FLISA are also discussed, which provides important guidance for the further development of FLISA.
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Affiliation(s)
- Yanbing Lv
- Key Lab for Special Functional Materials of the Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
| | - Jinjin Fan
- Key Lab for Special Functional Materials of the Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
| | - Man Zhao
- Key Lab for Special Functional Materials of the Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
| | - Ruili Wu
- Key Lab for Special Functional Materials of the Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
| | - Lin Song Li
- Key Lab for Special Functional Materials of the Ministry of Education, and School of Materials, Henan University, Kaifeng, 475004, China.
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4
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Lv Y, Wang P, Li J, Li N, Xu D, Wu R, Shen H, Li LS. Establishment of a Ca(II) ion-quantum dots fluorescence signal amplification sensor for high-sensitivity biomarker detection. Anal Chim Acta 2022; 1237:340534. [DOI: 10.1016/j.aca.2022.340534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 10/05/2022] [Accepted: 10/16/2022] [Indexed: 11/01/2022]
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5
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Tang Q, Xu J, Wei S, Chen H, Chen J, Zhang H, Liu L. Label-free and highly sensitive detection of CRP based on the combination of nicking endonuclease-assisted signal amplification and capillary electrophoresis-UV assay. Anal Chim Acta 2022; 1221:340131. [DOI: 10.1016/j.aca.2022.340131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 01/08/2023]
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Lakshmanakumar M, Nesakumar N, Sethuraman S, S RK, Krishnan UM, Rayappan JBB. Fabrication of GQD-Electrodeposited Screen-Printed Carbon Electrodes for the Detection of the CRP Biomarker. ACS OMEGA 2021; 6:32528-32536. [PMID: 34901602 PMCID: PMC8655768 DOI: 10.1021/acsomega.1c04043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 10/27/2021] [Indexed: 05/24/2023]
Abstract
The traditional three-electrode electrochemical system used in the development of biosensors for detecting various biomarkers of interest necessitates the use of bulk electrodes, which precludes the deployment of handheld electrochemical devices in clinical applications. Affordable screen-printed carbon electrodes (SPCEs) modified with functional interfaces are being developed to enhance the sensitivity of a compact sensing system as a whole. In this work, SPCEs were fabricated on an overhead projection (OHP) sheet in three different active areas of 2 × 2, 3 × 3, and 4 × 4 mm2 using a screen printing technique, and then ∼2 nm sized graphene quantum dots (GQDs) were electrodeposited over the SPCE surface to add functionality for the detection of ultralow levels of one of the cardiac biomarkers, C-reactive protein (CRP). The proposed mediator-dependent voltammetric biosensor exhibited good sensitivity, a low detection limit, and a linear range of 2.45 μA ng-1 mL-1 cm-2, 0.036 ng mL-1, and 0.5-10 ng mL-1, respectively. The fabricated SPCE/GQDs/anti-CRP biosensor could rapidly detect CRP in less than 25 s. The intra- and interassays were performed with five sensor strips, which showed a minimum standard deviation of 1.85 and 2.8%, respectively. The SPCE/GQDs/anti-CRP electrode was used to detect CRP concentrations in a ringer lactate solution. Thus, the developed biosensor has all of the characteristics such as rapidity, inexpensive disposable electrodes, miniaturization, and a lower detection limit needed to evolve as a point-of-care (PoC) application.
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Affiliation(s)
- Muthaiyan Lakshmanakumar
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Noel Nesakumar
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Swaminathan Sethuraman
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Rajan K. S
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - Uma Maheswari Krishnan
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
| | - John Bosco Balaguru Rayappan
- Centre
for Nanotechnology & Advanced Biomaterials (CeNTAB), School of Electrical
& Electronics Engineering (SEEE), School of Chemical & Biotechnology
(SCBT), School of Arts, Science & Humanities (SASH), SASTRA Deemed University, Thanjavur 613 401, Tamil Nadu, India
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Lv Y, Yang Y, Wu R, Xu Y, Li J, Li N, Shen H, Chai Y, Li LS. A CdSe/ZnS core/shell competitive quantum dot-based fluorescence-linked immunosorbent assay for the sensitive and accurate detection of aflatoxin B1 in corn sample. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2021. [DOI: 10.1007/s11694-021-01223-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Moreira FTC, Correia BP, Sousa MP, Sales GF. Colorimetric cellulose-based test-strip for rapid detection of amyloid β-42. Mikrochim Acta 2021; 188:334. [PMID: 34498145 DOI: 10.1007/s00604-021-04996-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 08/13/2021] [Indexed: 11/30/2022]
Abstract
An innovative sensing assay is described for point-of-care (PoC) quantification of a biomarker of Alzheimer's disease, amyloid β-42 (Aβ-42). This device is based on a cellulose paper-dye test strip platform in which the corresponding detection layer is integrated by applying a molecularly imprinted polymer (MIP) to the cellulose paper surface. Briefly, the cellulose paper is chemically modified with a silane to subsequently apply the MIP detection layer. The imprinting process is confirmed by the parallel preparation of a control material, namely a non-imprinted polymer (NIP). The chemical changes of the surface were evaluated by Fourier transform infrared spectroscopy (FTIR), contact angle, and thermogravimetric analysis (TG). Proteins and peptides can be quantified by conventional staining methods. For this purpose, Coomassie blue (CB) was used as a staining dye for the detection and quantification of Aβ-42. Quantitative determination is made possible by taking a photograph and applying an appropriate mathematical treatment to the color coordinates provided by the ImageJ program. The MIP shows a linear range between 1.0 ng/mL and 10 μg/mL and a detection limit of 0.71 ng/mL. Overall, this cellulose-based assay is suitable for the detection of peptides or proteins in a sample by visual comparison of color change. The test strip provides a simple, instrument-free, and cost-effective method with high chemical stability, capable of detecting very small amounts of peptides or proteins in a sample, and can be used for the detection of any (bio)molecule of interest.
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Affiliation(s)
- Felismina T C Moreira
- BioMark@ISEP, School of Engineering, Polytechnic of Porto, R. Dr. António Bernardino de Almeida, 431, 4249-015, Porto, Portugal. .,CEB, Centre of Biological Engineering, Minho University, Braga, Portugal.
| | - Barbara P Correia
- BioMark@ISEP, School of Engineering, Polytechnic of Porto, R. Dr. António Bernardino de Almeida, 431, 4249-015, Porto, Portugal.,CEB, Centre of Biological Engineering, Minho University, Braga, Portugal
| | - Mariana P Sousa
- BioMark@ISEP, School of Engineering, Polytechnic of Porto, R. Dr. António Bernardino de Almeida, 431, 4249-015, Porto, Portugal.,CEB, Centre of Biological Engineering, Minho University, Braga, Portugal
| | - Goreti F Sales
- CEB, Centre of Biological Engineering, Minho University, Braga, Portugal.,BioMark@UC, Faculty of Sciences and Technology, University of Coimbra, R. Sílvio Lima, pólo II, 3030-790, Coimbra, Portugal
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Chen L, Li Y, Miao L, Pang X, Li T, Qian Y, Li H. "Lighting-up" curcumin nanoparticles triggered by pH for developing improved enzyme-linked immunosorbent assay. Biosens Bioelectron 2021; 188:113308. [PMID: 34030097 DOI: 10.1016/j.bios.2021.113308] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/30/2021] [Accepted: 05/03/2021] [Indexed: 02/08/2023]
Abstract
In the field of precision medicine, the anticipated features of ideal drug delivery systems (DDS) have high drug loading capacity and effective stimuli-triggered mechanism, which are fitting well with the expected merits of signal labels for enhanced enzyme-linked immunosorbent assay (ELISA). Inspired by this, poly (diallyldimethylammonium chloride)-capped curcumin nanoparticles (PDDA@CUR NPs) with high loading capacity were synthesized as signal labels and further applied to dual-model colorimetric and fluorescence ELISA for the detection of C-reactive protein (CRP). Curcumin (CUR) was elaborately selected as report molecule similar to the roles of drugs in DDS, which dispersed in neutral water exhibits a negligible fluorescence response due to the aggregation of CUR molecules induced quenching effect, stimulated by basic water (BW, pH 12.36), the allochroic effect from colorless to orange occurred and fluorescence restored because of the keto-enol tautomerism in the molecular structure of CUR, just like lighting-up (from signal "OFF" to signal "ON"), yielded a dual-model colorimetric and fluorescent signal readout. PDDA, as a polycationic electrolyte, provided a biological platform that is capable of interacting with CRP label antibodies by virtue of its positive centers. The results show that "lighting-up" CUR NPs-based dual-modal colorimetric and fluorescent ELISA for CRP detection has the merits of easy-to-use, good enough sensitivity and reliability. And more importantly, it brings innovative ideas for the precise identification and quantification of protein biomarkers.
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Affiliation(s)
- Lei Chen
- College of Optoelectronics Technology, Chengdu University of Information Technology, Chengdu 610225, China
| | - Yan Li
- College of Optoelectronics Technology, Chengdu University of Information Technology, Chengdu 610225, China
| | - Luyang Miao
- School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
| | - Xiaolong Pang
- College of Optoelectronics Technology, Chengdu University of Information Technology, Chengdu 610225, China
| | - Tao Li
- Department of Cardiovascular Surgery, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China
| | - Yongjun Qian
- Department of Cardiovascular Surgery, National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University, Chengdu 610041, Sichuan Province, China.
| | - He Li
- College of Optoelectronics Technology, Chengdu University of Information Technology, Chengdu 610225, China.
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Xu Y, Lv Y, Wu R, Li J, Shen H, Yang H, Zhang H, Li LS. Sensitive Immunoassay Based on Biocompatible and Robust Silica-Coated Cd-Free InP-Based Quantum Dots. Inorg Chem 2021; 60:6503-6513. [PMID: 33847486 DOI: 10.1021/acs.inorgchem.1c00304] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Low-toxic InP quantum dots (QDs) as an ideal candidate for Cd-based QDs have tremendous potential for next-generation commercial display and biological detection applications. However, the progress in biological detection is still far behind that of the Cd-based QDs. This is mainly because the InP-based QDs are of inferior stability and photoluminescence quantum yield (PL QY) in aqueous solution. Here, PL QY of 65% and excellent stability of InP/GaP/ZnS QD@SiO2 nanoparticles have been successfully synthesized via a silica coating method. The containing thiol-capped hydrophobic InP/GaP/ZnS QDs were pre-silanized with waterless, ammonia-free hydrolysis tetraethyl orthosilicate, and subsequently, an outer silica shell was generated in the reverse microemulsion. The corresponding QD-based fluorescence-linked immunosorbent assay exhibits a high sensitivity of 0.9 ng mL-1 for C-reactive protein and the broad detection range of 1-1000 ng mL-1, which was close to that of the state-of-the-art Cd-based QD@SiO2 nanoparticles and had the highest sensitivity of Cd-free QDs so far. This work provides a very successful silica coating method for the containing thiol-capped hydrophobic QDs and the QDs highly sensitive to water and oxygen, and the obtained InP/GaP/ZnS QD@SiO2 nanoparticles were considered as the robust, biocompatible, and promising Cd-free fluorescent labels for the further ultra-sensitive detection.
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Affiliation(s)
- Yanxia Xu
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Yanbing Lv
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Ruili Wu
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Jinjie Li
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Huaibin Shen
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Huawei Yang
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Han Zhang
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Lin Song Li
- Key Lab for Special Functional Materials, Ministry of Education, National and Local Joint Engineering Research Center for High-Efficiency Display and Lighting Technology, School of Materials Science and Engineering, and Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
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Gupta PK, Son SE, Seong GH. Functionalized ultra-fine bimetallic PtRu alloy nanoparticle with high peroxidase-mimicking activity for rapid and sensitive colorimetric quantification of C-reactive protein. Mikrochim Acta 2021; 188:119. [PMID: 33751231 DOI: 10.1007/s00604-021-04775-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Accepted: 02/22/2021] [Indexed: 01/08/2023]
Abstract
The in situ synthesis is reported of citric acid-functionalized ultra-fine bimetallic PtRu alloy nanoparticles (CA@PtRu ANPs) through a simple one-pot wet chemical method. The cost-efficient CA@PtRu ANPs with an average diameter of 3.2 nm revealed to have enhanced surface area, peroxidase-like activity, high stability, and adequate availability of functional groups to bind biomolecules. Along with nanoparticle surface area, the surface charge has also significantly affected the peroxidase-like activity and the colloidal suspension stability. As an excellent immobilization matrix and peroxidase mimic, the CA@PtRu ANPs were utilized to develop non-enzymatic colorimetric immunoassay for rapid, selective, and sensitive quantification of C-reactive protein (CRP) biomarkers. In this immunoassay, CA@PtRu ANPs serve as enzyme mimic that significantly amplifies the color signals, and amine-functionalized silica-coated magnetic microbeads (APTES/SiO2@Fe3O4) act as CRP-recognizing capture probes. The absorbance curves of colorimetric immunoassay were measured in wavelengths between 550 and 750 nm, and the maximum absorbance at 652 nm was used to establish a linear relationship between absorbance and CRP concentrations. The developed colorimetric immunoassay showed rapid and sensitive quantification of CRP levels from 0.01 to 180 μg mL-1 with a LOD of 0.01 μg mL-1. Moreover, the mean recovery of CRP from spiked human serum samples lies between 97 and 109% (n = 3), which indicates that the proposed nanozyme-linked immunoassay has the potential to be used in rapid point-of-care applications.
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Affiliation(s)
- Pramod K Gupta
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 426-791, South Korea
| | - Seong Eun Son
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 426-791, South Korea
| | - Gi Hun Seong
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, 426-791, South Korea.
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Aboeldalyl S, James C, Seyam E, Ibrahim EM, Shawki HED, Amer S. The Role of Chronic Inflammation in Polycystic Ovarian Syndrome-A Systematic Review and Meta-Analysis. Int J Mol Sci 2021; 22:ijms22052734. [PMID: 33800490 PMCID: PMC7962967 DOI: 10.3390/ijms22052734] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 02/07/2023] Open
Abstract
Although the current literature associates polycystic ovarian syndrome (PCOS) with chronic inflammation, the evidence for this link remains inconclusive and its causal nature remains unclear. The purpose of this systematic review was to assess the inflammatory status in PCOS women and to determine whether it is related to PCOS or to its associated adiposity. We searched electronic databases including PUBMED, EMBASE and MEDLINE, SCOPUS, DynaMed plus, TRIP, ScienceDirect and Cochrane Library, for studies investigating C-reactive protein (CRP) and other inflammatory makers in PCOS women versus healthy controls. Quality and risk of bias for selected studies were assessed using the modified Newcastle-Ottawa scale. CRP data were extracted and pooled using RevMan for calculation of the standardized mean difference (SMD) and 95% confidence interval (CI). Eighty-five eligible studies were included in the systematic review, of which 63 were included in the meta-analysis. Pooled analysis of the 63 studies revealed significantly higher circulating CRP in PCOS women (n = 4086) versus controls (n = 3120) (SMD 1.26, 95%CI, 0.99, 1.53). Sensitivity meta-analysis of 35 high quality studies including non-obese women showed significantly higher circulating CRP in PCOS women versus controls (SMD 1.80, 95%CI, 1.36, 2.25). In conclusion, circulating CRP is moderately elevated in PCOS women independent of obesity, which is indicative of low-grade chronic inflammation.
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Affiliation(s)
- Shaimaa Aboeldalyl
- Academic Unit of Translational Medical Sciences, School of Medicine, Royal Derby Hospital Centre, University of Nottingham, Derby DE22 3DT, UK;
- Faculty of Medicine, Obstetrics and Gynaecology, University of Minia, Minia 61519, Egypt; (E.S.); (E.M.I.); (H.E.-D.S.)
| | - Cathryn James
- University Hospitals of Derby and Burton NHS Foundation Trust, Library & Knowledge Service, Derby DE22 3NT, UK;
| | - Emaduldin Seyam
- Faculty of Medicine, Obstetrics and Gynaecology, University of Minia, Minia 61519, Egypt; (E.S.); (E.M.I.); (H.E.-D.S.)
| | - Emad Moussa Ibrahim
- Faculty of Medicine, Obstetrics and Gynaecology, University of Minia, Minia 61519, Egypt; (E.S.); (E.M.I.); (H.E.-D.S.)
| | - Hossam El-Din Shawki
- Faculty of Medicine, Obstetrics and Gynaecology, University of Minia, Minia 61519, Egypt; (E.S.); (E.M.I.); (H.E.-D.S.)
| | - Saad Amer
- Academic Unit of Translational Medical Sciences, School of Medicine, Royal Derby Hospital Centre, University of Nottingham, Derby DE22 3DT, UK;
- Correspondence: ; Tel.: +44-(1332)-786773
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Lv Y, Jin Q, Li J, Xu Y, Li LS, Shen H, Wu R. A CdSe/ZnS Core/Shell Quantum Dot-based Fluorescence-linked Immunosorbent Assay for the Sensitive and Accurate Detection of Procalcitonin. CHEM LETT 2021. [DOI: 10.1246/cl.200655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yanbing Lv
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Qiaoli Jin
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Jinjie Li
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Yanxia Xu
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Lin Song Li
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Huaibin Shen
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
| | - Ruili Wu
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology, School of Materials and Engineering, Collaborative Innovation Centre of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, Henan, P. R. China
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14
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Matray T, Singh S, Sherif H, Farber K, Kwang E, VanBrunt M, Matsui E, Yada H. A novel class of polymeric fluorescent dyes assembled using a DNA synthesizer. PLoS One 2020; 15:e0243218. [PMID: 33275644 PMCID: PMC7717558 DOI: 10.1371/journal.pone.0243218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 11/17/2020] [Indexed: 12/02/2022] Open
Abstract
In the pursuit of a novel class of fluorescent dyes we have developed a programmable polymer system that enables the rational design and control of macromolecular constructs through simple control of polymer primary sequence. These polymers are assembled using standard phosphoramidite chemistry on a DNA synthesizer which allows for extremely rapid prototyping and enables many permutations due to the large selection of phosphoramidite monomers presently available on the market. This programmability to some extent allows us to control the interactions/spacing of payload molecules distributed along the designed polymeric backbone. Control of molecular architecture using this technology has allowed us to address the long-standing technical issue of contact quenching between fluorescent dyes offering new possibilities in the life sciences arena. Much like peptidic sequences coding for enzymes, cofactors, and receptors (all needing control of tertiary structure for proper function via primary sequence) our programmable system approaches a similar endpoint using a phosphate based polymeric backbone assembled in a completely automated fashion. Using this novel technology, we have efficiently synthesized several types of fluorescent dyes and demonstrated the programmability in molecule design, including the increases in brightness of the fluorescence emission.
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Affiliation(s)
- Tracy Matray
- R and D Department, Sony Biotechnology, Bothell, Washington, United States of America
- * E-mail:
| | - Sharat Singh
- Independent Consultant, Sony Biotechnology, Bothell, Washington, United States of America
| | - Hesham Sherif
- R and D Department, Sony Biotechnology, Bothell, Washington, United States of America
| | - Kenneth Farber
- R and D Department, Sony Biotechnology, Bothell, Washington, United States of America
| | - Erin Kwang
- R and D Department, Sony Biotechnology, Bothell, Washington, United States of America
| | - Michael VanBrunt
- R and D Department, Sony Biotechnology, Bothell, Washington, United States of America
| | - Eriko Matsui
- Medical Business Group, Sony Imaging Products & Solutions Inc., Atsugi-shi, Kanagawa, Japan
| | - Hiroaki Yada
- Medical Business Group, Sony Imaging Products & Solutions Inc., Atsugi-shi, Kanagawa, Japan
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15
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Impedimetric detection of Banana bunchy top virus using CdSe quantum dots for signal amplification. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2345-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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16
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Tan Z, Li L, Ma Y, Geng X. Clinical Significance of Cys-C and hs-CRP in Coronary Heart Disease Patients Undergoing Percutaneous Coronary Intervention. Braz J Cardiovasc Surg 2019; 34:17-21. [PMID: 30810669 PMCID: PMC6385828 DOI: 10.21470/1678-9741-2018-0171] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 07/31/2018] [Indexed: 11/16/2022] Open
Abstract
Objective To investigate the clinical significance of serum cystatin C (Cys-C) and
high-sensitivity C-reactive protein (hs-CRP) in coronary heart disease (CHD)
patients undergoing percutaneous coronary intervention (PCI). Methods One hundred and twenty-eight CHD patients were divided into drug treatment
(56 cases) and PCI treatment (72 cases) groups, receiving conventional drug
treatment and PCI plus conventional drug treatment, respectively. At
admission time and 4 weeks after treatment, the left ventricular ejection
fraction (LVEF), left ventricular end diastolic diameter, and left
ventricular end systolic diameter were measured. At admission time and 24h,
72h, 1 week, and 4 weeks after treatment, the serum levels of Cys-C and
hs-CRP were determined. Results After 4 weeks of treatment, LVEF in the PCI treatment group was significantly
higher than that before treatment (P<0.01) and it was
significantly higher than in the drug treatment group at the same time
(P<0.01). Cys-C and hs-CRP level in the PCI
treatment group were significantly higher than in the drug treatment group
72h and 1 week after treatment (P<0.05 or
P<0.01), respectively, but they were significantly
lower than in the drug treatment group 4 weeks after treatment
(P<0.01). There were obvious interaction effects
between grouping factor and time factor in Cys-C (F=3.62,
P<0.05) and hs-CRP (F=17.85,
P<0.01). Conclusion Serum levels of Cys-C and hs-CRP are closely related to the heart function in
CHD patients undergoing PCI, and they may be used for predicting the outcome
of PCI.
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Affiliation(s)
- Zheng Tan
- Second Department of Cardiovasology, Tangshan Gongren Hospital, Hebei, China
| | - Li Li
- Second Department of Cardiovasology, Tangshan Gongren Hospital, Hebei, China
| | - Yi Ma
- Second Department of Cardiovasology, Tangshan Gongren Hospital, Hebei, China
| | - Xuebin Geng
- Second Department of Cardiovasology, Tangshan Gongren Hospital, Hebei, China
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17
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Chern M, Kays JC, Bhuckory S, Dennis AM. Sensing with photoluminescent semiconductor quantum dots. Methods Appl Fluoresc 2019; 7:012005. [PMID: 30530939 PMCID: PMC7233465 DOI: 10.1088/2050-6120/aaf6f8] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fluorescent sensors benefit from high signal-to-noise and multiple measurement modalities, enabling a multitude of applications and flexibility of design. Semiconductor nanocrystal quantum dots (QDs) are excellent fluorophores for sensors because of their extraordinary optical properties. They have high thermal and photochemical stability compared to organic dyes or fluorescent proteins and are extremely bright due to their large molar cross-sections. In contrast to organic dyes, QD emission profiles are symmetric, with relatively narrow bandwidths. In addition, the size tunability of their emission color, which is a result of quantum confinement, make QDs exceptional emitters with high color purity from the ultra-violet to near infrared wavelength range. The role of QDs in sensors ranges from simple fluorescent tags, as used in immunoassays, to intrinsic sensors that utilize the inherent photophysical response of QDs to fluctuations in temperature, electric field, or ion concentration. In more complex configurations, QDs and biomolecular recognition moieties like antibodies are combined with a third component to modulate the optical signal via energy transfer. QDs can act as donors, acceptors, or both in energy transfer-based sensors using Förster resonance energy transfer (FRET), nanometal surface energy transfer (NSET), or charge or electron transfer. The changes in both spectral response and photoluminescent lifetimes have been successfully harnessed to produce sensitive sensors and multiplexed devices. While technical challenges related to biofunctionalization and the high cost of laboratory-grade fluorimeters have thus far prevented broad implementation of QD-based sensing in clinical or commercial settings, improvements in bioconjugation methods and detection schemes, including using simple consumer devices like cell phone cameras, are lowering the barrier to broad use of more sensitive QD-based devices.
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Affiliation(s)
- Margaret Chern
- Department of Materials Science and Engineering, Boston University, Boston, United States of America
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18
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Zou M, Samiullah M, Xu P, Wang S, He J, Wu T, Luo F, Yan J. Construction of novel procoagulant protein targeting neuropilin-1 on tumour vasculature for tumour embolization therapy. J Drug Target 2019; 27:885-895. [PMID: 30628471 DOI: 10.1080/1061186x.2019.1566337] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The cellular transmembrane receptor Neuropilin-1(NRP-1) is overexpressed in tumour tissue and endothelial cells of tumour vessels, whereas it has limited expression in normal tissues. This study aimed to design a novel recombinant protein tTF-EG3287, which consisting of the truncated tissue factor (tTF) and the NRP-1 targeting peptide EG3287. The procoagulant protein selectively activates blood coagulation in tumour vessels once bound to the cell surface of the tumour vasculature by a targeting peptide EG3287. In this study, procoagulant activity of the recombinant protein tTF-EG3287 was evaluated by Spectozyme FXa assay. NRP-1 targeting ability was analysed by fluorescence confocal microscopy and flow cytometry. The living imaging system was used to assess the tumour targeting ability of recombinant proteins tTF-EG3287 in vivo. Tumour growth inhibition showed effective antitumor activity in HepG2 tumour-bearing nude mice. Histological study showed obvious thrombosis and thromboembolism in tumour vessels and cell necrosis of tumour tissue, without any clear side effect such as thrombosis in other organs.
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Affiliation(s)
- Mingyuan Zou
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Malik Samiullah
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Peilan Xu
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Shengyu Wang
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Jie He
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Ting Wu
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Fanghong Luo
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
| | - Jianghua Yan
- a Cancer Research Center, Medical College , Xiamen University , Xiamen , China
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19
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Lv Y, Li J, Wu R, Wang G, Wu M, Shen H, Li LS. Silica-encapsulated quantum dots for highly efficient and stable fluorescence immunoassay of C-reactive protein. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.06.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Label-Free Electrochemical Immunoassay for C-Reactive Protein. BIOSENSORS-BASEL 2018; 8:bios8020034. [PMID: 29601504 PMCID: PMC6022967 DOI: 10.3390/bios8020034] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 03/27/2018] [Accepted: 03/27/2018] [Indexed: 12/27/2022]
Abstract
C-reactive protein (CRP) is one of the most expressed proteins in blood during acute phase inflammation, and its minute level increase has also been recognized for the clinical diagnosis of cardio vascular diseases. Unfortunately, the available commercial immunoassays are labour intensive, require large sample volumes, and have practical limitations, such as low stability and high production costs. Hence, we have developed a simple, cost effective, and label-free electrochemical immunoassay for the measurement of CRP in a drop of serum sample using an immunosensor strip made up of a screen printed carbon electrode (SPE) modified with anti-CRP functionalized gold nanoparticles (AuNPs). The measurement relies on the decrease of the oxidation current of the redox indicator Fe3+/Fe2+, resulting from the immunoreaction between CRP and anti-CRP. Under optimal conditions, the present immunoassay measures CRP in a linear range from 0.4–200 nM (0.047–23.6 µg mL−1), with a detection limit of 0.15 nM (17 ng mL−1, S/N = 3) and sensitivity of 90.7 nA nM−1, in addition to a good reproducibility and storage stability. The analytical applicability of the presented immunoassay is verified by CRP measurements in human blood serum samples. This work provides the basis for a low-priced, safe, and easy-to-use point-of-care immunosensor assay to measure CRP at clinically relevant concentrations.
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21
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Sonuç Karaboğa MN, Sezgintürk MK. A novel silanization agent based single used biosensing system: Detection of C-reactive protein as a potential Alzheimer's disease blood biomarker. J Pharm Biomed Anal 2018; 154:227-235. [PMID: 29558723 DOI: 10.1016/j.jpba.2018.03.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 03/06/2018] [Accepted: 03/07/2018] [Indexed: 11/19/2022]
Abstract
This paper illustrates a new and sensitive electrochemical immunosensor for the analysis of C-reactive protein. Indium Tin Oxide (ITO) disposable sheets were modified by using 3-cyanopropyltrimethoxysilane (CPTMS) self-assembled monolayers (SAMs) for the first time for immobilizing the anti-CRP antibody via covalent interactions without the need for any cross-linking agent. Cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS), as well as square wave voltammetry (SWV) methods were applied to characterize immobilization steps of anti-CRP and to determine the CRP concentration. The optimization of the fabricated parameters and the analytical performance of the biosensor were widely evaluated. Charge transfer resistance changes were highly linear and sensitive with CRP concentration of 3.25-208 fg mL-1 range and associated with a limit of detection of 0.455 fg mL-1. This impedimetric biosensing system have excellent repeatability, reproducibility and reusability. Moreover, the binding characterization of CRP to anti-CRP was monitored by a single frequency impedance technique. The amount of CRP in human serum samples were analyzed by fabricated biosensor to determine the feasibility of the biosensing system in medical purposes. We suggest that CPTMS, a new silanization agent, is ideal in biosensor applications.
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22
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Wang S, Li JJ, Lv Y, Wu R, Xing M, Shen H, Wang H, Li LS, Chen X. Synthesis of Reabsorption-Suppressed Type-II/Type-I ZnSe/CdS/ZnS Core/Shell Quantum Dots and Their Application for Immunosorbent Assay. NANOSCALE RESEARCH LETTERS 2017; 12:380. [PMID: 28582961 PMCID: PMC5457375 DOI: 10.1186/s11671-017-2135-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/10/2017] [Indexed: 06/07/2023]
Abstract
We report a phosphine-free one-pot method to synthesize ZnSe/CdS/ZnS core-shell quantum dots (QDs) with composite type-II/type-I structures and consequent reabsorption suppression properties. The as-synthesized QDs possess high efficient red emission (with quantum yield of 82%) and high optical stability. Compared to type-I QDs, the ZnSe/CdS/ZnS QDs show larger Stokes shift and lower reabsorption which can reduce the emission loss and improve the level of fluorescence output. The ZnSe/CdS/ZnS QDs are used as fluorescent labels to exploit their application in fluorescence-linked immunosorbent assay (FLISA) for the first time in the detection of C-reactive protein (CRP) with a limit of detection (LOD) of 0.85 ng/mL, which is more sensitive than that of CdSe/ZnS type-I QDs based FLISA (1.00 ng/mL). The results indicate that the ZnSe/CdS/ZnS type-II/type-I QDs may be good candidates for applications in biomedical information detection.
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Affiliation(s)
- Sheng Wang
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun City, 130021 People’s Republic of China
| | - Jin Jie Li
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Yanbing Lv
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Ruili Wu
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Ming Xing
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun City, 130021 People’s Republic of China
| | - Huaibin Shen
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Hongzhe Wang
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Lin Song Li
- Key Laboratory for Special Functional Materials, Henan University, Kaifeng, 475004 People’s Republic of China
| | - Xia Chen
- National & Local United Engineering Laboratory for Chinese Herbal Medicine Breeding and Cultivation, School of Life Sciences, Jilin University, Changchun City, 130021 People’s Republic of China
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23
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Rajesh, Singal S, Kotnala RK. Single Frequency Impedance Analysis on Reduced Graphene Oxide Screen-Printed Electrode for Biomolecular Detection. Appl Biochem Biotechnol 2017; 183:672-683. [DOI: 10.1007/s12010-017-2510-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 05/09/2017] [Indexed: 12/29/2022]
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24
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Lv Y, Wu R, Feng K, Li J, Mao Q, Yuan H, Shen H, Chai X, Li LS. Highly sensitive and accurate detection of C-reactive protein by CdSe/ZnS quantum dot-based fluorescence-linked immunosorbent assay. J Nanobiotechnology 2017; 15:35. [PMID: 28464873 PMCID: PMC5414212 DOI: 10.1186/s12951-017-0267-4] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 04/10/2017] [Indexed: 11/10/2022] Open
Abstract
Background The conventional and widely used enzyme-linked immunosorbent assays (ELISA), due to specificity and high-sensitivity, were suitable in vitro diagnosis. But enzymes are vulnerable to the external conditions, and the complex operation steps limit its application. Semiconductor quantum dots have been successfully used in biological and medical research due to the high photoluminescence and high resistance to photobleaching. In this study, we have developed a novel quantum dot-labeled immunosorbent assay for rapid disease detection of C-reactive protein (CRP). Results The assay for the detection of CRP can provide a wide analytical range of 1.56–400 ng/mL with the limit of detection (LOD) = 0.46 ng/mL and the limit of quantification = 1.53 ng/mL. The precision of the assay has been confirmed for low coefficient of variation, less than 10% (intra-assay) and less than 15% (inter-assay). The accuracy of assay meets the requirements with the recoveries of 95.4–105.7%. Furthermore, clinical samples have been collected and used for correlation analysis between this FLISA and gold standard Roche immunoturbidimetry. It shows excellent accurate concordance and the correlation coefficient value (R) is as high as 0.989 (n = 34). Conclusions This in vitro quantum dot-based detection method offers a lower LOD and a wide liner detection range than ELISA. The total reaction time is only 50 min, which is much shorter than the commercialization ELISA (about 120 min). All of the results show that a convenient, sensitive, and accurate fluorescence-linked immunosorbent assay method has been well established for the detection of CRP samples. Therefore, this method has immense potential for the development of rapid and cost-effective in vitro diagnostic kits. Electronic supplementary material The online version of this article (doi:10.1186/s12951-017-0267-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yanbing Lv
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, China
| | - Ruili Wu
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, China.
| | | | - Jinjie Li
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, China
| | - Qing Mao
- NepQD Biotech Corp, Taizhou, 225300, China
| | - Hang Yuan
- NepQD Biotech Corp, Taizhou, 225300, China
| | - Huaibin Shen
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, China
| | | | - Lin Song Li
- Key Laboratory for Special Functional Materials of Ministry of Education, Henan University, Kaifeng, 475004, China.
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25
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Ciaurriz P, Fernández F, Tellechea E, Moran JF, Asensio AC. Comparison of four functionalization methods of gold nanoparticles for enhancing the enzyme-linked immunosorbent assay (ELISA). BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2017; 8:244-253. [PMID: 28243563 PMCID: PMC5301989 DOI: 10.3762/bjnano.8.27] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 01/02/2017] [Indexed: 05/08/2023]
Abstract
The enzyme-linked immunosorbent assay (ELISA) technique is based on the specific recognition ability of the molecular structure of an antigen (epitope) by an antibody and is likely the most important diagnostic technique used today in bioscience. With this methodology, it is possible to diagnose illness, allergies, alimentary fraud, and even to detect small molecules such as toxins, pesticides, heavy metals, etc. For this reason, any procedures that improve the detection limit, sensitivity or reduce the analysis time could have an important impact in several fields. In this respect, many methods have been developed for improving the technique, ranging from fluorescence substrates to methods for increasing the number of enzyme molecules involved in the detection such as the biotin-streptavidin method. In this context, nanotechnology has offered a significant number of proposed solutions, mainly based on the functionalization of nanoparticles from gold to carbon which could be used as antibody carriers as well as reporter enzymes like peroxidase. However, few works have focused on the study of best practices for nanoparticle functionalization for ELISA enhancement. In this work, we use 20 nm gold nanoparticles (AuNPs) as a vehicle for secondary antibodies and peroxidase (HRP). The design of experiments technique (DOE) and four different methods for biomolecule loading were compared using a rabbit IgG/goat anti-rabbit IgG ELISA model (adsorption, directional, covalent and a combination thereof). As a result, AuNP probes prepared by direct adsorption were the most effective method. AuNPs probes were then used to detect gliadin, one of the main components of wheat gluten, the protein composite that causes celiac disease. With this optimized approach, our data showed a sensitivity increase of at least five times and a lower detection limit with respect to a standard ELISA of at least three times. Additionally, the assay time was remarkably decreased.
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Affiliation(s)
- Paula Ciaurriz
- Cemitec (Multidisciplinary Center of Technologies for Industry), Polígono Mocholí, Plaza Cein 3, Noain 31110, Spain
| | - Fátima Fernández
- Cemitec (Multidisciplinary Center of Technologies for Industry), Polígono Mocholí, Plaza Cein 3, Noain 31110, Spain
| | - Edurne Tellechea
- Cemitec (Multidisciplinary Center of Technologies for Industry), Polígono Mocholí, Plaza Cein 3, Noain 31110, Spain
| | - Jose F Moran
- IdAB-CSIC-UPNA-GN (Institute of Agro-Biotechnology), Public University of Navarre, Campus Arrosadía s/n, Pamplona 31006, Spain
| | - Aaron C Asensio
- Cemitec (Multidisciplinary Center of Technologies for Industry), Polígono Mocholí, Plaza Cein 3, Noain 31110, Spain
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26
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Naz S, Ghafoor F, Iqbal IA, Saqlan Naqvi SM. Development of a high sensitivity C-reactive protein immunoassay and comparison with a commercial kit. J Immunoassay Immunochem 2016; 38:10-20. [PMID: 27366878 DOI: 10.1080/15321819.2016.1206565] [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] [Indexed: 01/11/2023]
Abstract
C-reactive protein (CRP) is intricately sensitive marker of inflammation, infection, and tissue damage. Role in the prognosis of heart diseases has been recently discovered. This study aimed to develop a cost-effective and high-sensitivity CRP immunoassay for use in cardiac risk assessment. Assay was optimized for coating, blocking of capturing antibody, dilution, and reaction time of the conjugate and sample volume. For normal reference range, CRP was determined in serum samples from apparently healthy volunteers. For clinical validation, CRP was determined in samples of acute coronary syndrome patients by in-house and commercial assays. The lower detection limit of in-house assay was 0.16 µg/L. Intra and inter assay imprecision was 4.39%, 4.6% and 8.6%, 9.3%, respectively. The correlation between the CRP levels by the two assays was r = 0.861. Sensitivity, specificity, predictive value for a positive test, and a negative test of in-house assay was 95.3%, 92.8%, 95.3%, and 92.8%, respectively. At lower-end CRP levels of both kits correlated very well but showed variation at upper end. In-house assay showed high sensitivity and reliability at lower end and it is hoped that will help to evaluate cardiac risk assessment (after improvement at upper end) in clinically poor settings.
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Affiliation(s)
- Saima Naz
- a National Health Research Complex , Shaikh Zayed Hospital , Lahore , Pakistan
| | - Farkhanda Ghafoor
- a National Health Research Complex , Shaikh Zayed Hospital , Lahore , Pakistan
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27
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Steffen P, Kwiatkowski M, Robertson WD, Zarrine-Afsar A, Deterra D, Richter V, Schlüter H. Protein species as diagnostic markers. J Proteomics 2016; 134:5-18. [DOI: 10.1016/j.jprot.2015.12.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Revised: 11/28/2015] [Accepted: 12/09/2015] [Indexed: 02/07/2023]
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28
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Chamorro-Garcia A, Merkoçi A. Nanobiosensors in diagnostics. Nanobiomedicine (Rij) 2016; 3:1849543516663574. [PMID: 29942385 PMCID: PMC5998262 DOI: 10.1177/1849543516663574] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 07/20/2016] [Indexed: 01/09/2023] Open
Abstract
Medical diagnosis has been greatly improved thanks to the development of new techniques capable of performing very sensitive detection and quantifying certain parameters. These parameters can be correlated with the presence of specific molecules and their quantity. Unfortunately, these techniques are demanding, expensive, and often complicated. On the other side, progress in other fields of science and technology has contributed to the rapid growth of nanotechnology. Although being an emerging discipline, nanotechnology has raised huge interest and expectations. Most of the enthusiasm comes from new possibilities and properties of nanomaterials. Biosensors (simple, robust, sensitive, cost-effective) combined with nanomaterials, also called nanobiosensors, are serving as bridge between advanced detection/diagnostics and daily/routine tests. Here we review some of the latest applications of nanobiosensors in diagnostics field.
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Affiliation(s)
- Alejandro Chamorro-Garcia
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technolgy, Campus UAB, Bellaterra, 08193 Barcelona, Spain
| | - Arben Merkoçi
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technolgy, Campus UAB, Bellaterra, 08193 Barcelona, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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Zhang P, Bao Y, Draz MS, Lu H, Liu C, Han H. Rapid and quantitative detection of C-reactive protein based on quantum dots and immunofiltration assay. Int J Nanomedicine 2015; 10:6161-73. [PMID: 26491289 PMCID: PMC4598213 DOI: 10.2147/ijn.s89307] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Convenient and rapid immunofiltration assays (IFAs) enable on-site "yes" or "no" determination of disease markers. However, traditional IFAs are commonly qualitative or semi-quantitative and are very limited for the efficient testing of samples in field diagnostics. Here, we overcome these limitations by developing a quantum dots (QDs)-based fluorescent IFA for the quantitative detection of C-reactive proteins (CRP). CRP, the well-known diagnostic marker for acute viral and bacterial infections, was used as a model analyte to demonstrate performance and sensitivity of our developed QDs-based IFA. QDs capped with both polyethylene glycol (PEG) and glutathione were used as fluorescent labels for our IFAs. The presence of the surface PEG layer, which reduced the non-specific protein interactions, in conjunction with the inherent optical properties of QDs, resulted in lower background signal, increased sensitivity, and ability to detect CRP down to 0.79 mg/L with only 5 µL serum sample. In addition, the developed assay is simple, fast and can quantitatively detect CRP with a detection limit up to 200 mg/L. Clinical test results of our QD-based IFA are well correlated with the traditional latex enhance immune-agglutination aggregation. The proposed QD-based fluorescent IFA is very promising, and potentially will be adopted for multiplexed immunoassay and in field point-of-care test.
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Affiliation(s)
- Pengfei Zhang
- Center for Translational Medicine, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Yan Bao
- Center for Translational Medicine, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Mohamed Shehata Draz
- Zhejiang-California International Nanosystems Institute, Zhejiang University, Hangzhou, Zhejiang, People's Republic of China ; Faculty of Science, Tanta University, Tanta, Egypt
| | - Huiqi Lu
- Center for Translational Medicine, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Chang Liu
- Center for Translational Medicine, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Huanxing Han
- Center for Translational Medicine, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
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Kokkinos C, Prodromidis M, Economou A, Petrou P, Kakabakos S. Disposable integrated bismuth citrate-modified screen-printed immunosensor for ultrasensitive quantum dot-based electrochemical assay of C-reactive protein in human serum. Anal Chim Acta 2015; 886:29-36. [DOI: 10.1016/j.aca.2015.05.035] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 05/25/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
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Yuan JP, Wang LW, Qu AP, Chen JM, Xiang QM, Chen C, Sun SR, Pang DW, Liu J, Li Y. Quantum dots-based quantitative and in situ multiple imaging on ki67 and cytokeratin to improve ki67 assessment in breast cancer. PLoS One 2015; 10:e0122734. [PMID: 25856425 PMCID: PMC4391934 DOI: 10.1371/journal.pone.0122734] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 02/12/2015] [Indexed: 01/16/2023] Open
Abstract
Background As a marker for tumor cell proliferation, Ki67 has important impacts on breast cancer (BC) prognosis. Although immunohistochemical staining is the current standard method, variations in analytical practice make it difficult for pathologists to manually measure Ki67 index. This study was to develop a fluorescent spectrum-based quantitative analysis of Ki67 expression by quantum-dots (QDs) multiple imaging technique. Methods A QDs-based in situ multiple fluorescent imaging method was developed, which stained nuclear Ki67 as red signal and cytoplasmic cytokeratin (CK) as green signal. Both Ki67 and CK signals were automatically separated and quantified by professional spectrum analysis software. This technique was applied to tissue microarrays from 240 BC patients. Both Ki67 and CK values, and Ki67/CK ratio were obtained for each patient, and their prognostic value on 5-year disease free survival was assessed. Results This method simultaneously stains nuclear Ki67 and cytoplasmic CK with clear signal contrast, making it easy for signal separation and quantification. The total fluorescent signal intensities of both Ki67 sum and CK sum were obtained, and Ki67/CK ratio calculated. Ki67 sum and Ki67/CK ratio were each attributed into two grades by X-tile software based on the best P value principle. Multivariate analysis showed Ki67 grade (P = 0.047) and Ki67/CK grade (P = 0.004) were independent prognostic factors. Furthermore, area under curve (AUC) of ROC analysis for Ki67/CK grade (AUC: 0.683, 95%CI: 0.613–0.752) was higher than Ki67 grade (AUC: 0.665, 95%CI: 0.596–0.734) and HER-2 gene (AUC: 0.586, 95%CI: 0.510–0.661), but lower than N stage (AUC: 0.760, 95%CI: 0.696–0.823) and histological grade (AUC: 0.756, 95%CI: 0.692–0.820) on predicting the risk for recurrence. Conclusions A QDs-based quantitative and in situ multiple imaging on Ki67 and CK was developed to improve Ki67 assessment in BC, and Ki67/CK grade had better performance than Ki67 grade in predicting prognosis.
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Affiliation(s)
- Jing Ping Yuan
- Department of Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors and Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
| | - Lin Wei Wang
- Department of Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors and Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
| | - Ai Ping Qu
- School of Computer, Wuhan University, Wuhan, Hubei, China
| | - Jia Mei Chen
- Department of Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors and Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
| | - Qing Ming Xiang
- Department of Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors and Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
| | - Chuang Chen
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Sheng-Rong Sun
- Department of Breast and Thyroid Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Dai-Wen Pang
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, State Key Laboratory of Virology, and Wuhan Institute of Biotechnology, Wuhan University, Wuhan, Hubei, China
| | - Juan Liu
- School of Computer, Wuhan University, Wuhan, Hubei, China
| | - Yan Li
- Department of Oncology, Zhongnan Hospital of Wuhan University, Hubei Key Laboratory of Tumor Biological Behaviors and Hubei Cancer Clinical Study Center, Wuhan, Hubei, China
- * E-mail:
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Han H, Pyun JC, Yoo H, Seo HS, Jung BH, Yoo YS, Woo K, Kang MJ. Highly Sensitive Immunoassay for the Diagnosis of Acute Myocardial Infarction Using Silica Spheres Encapsulating a Quantum Dot Layer. Anal Chem 2014; 86:10157-63. [DOI: 10.1021/ac502412x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hyojeong Han
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
| | - Jae-Chul Pyun
- Department
of Materials Science and Engineering, Yonsei University, Seoul 120-749, Republic of Korea
| | - Hyein Yoo
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
| | - Hong Seog Seo
- Cardiovascular
Center, Korea University Guro Hospital, Korea University College of Medicine, Seoul 152-703, Republic of Korea
| | - Byung Hwa Jung
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
| | - Young Sook Yoo
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
| | - Kyoungja Woo
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
| | - Min-Jung Kang
- Molecular
Recognition Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
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Speranskaya ES, Beloglazova NV, Abé S, Aubert T, Smet PF, Poelman D, Goryacheva IY, De Saeger S, Hens Z. Hydrophilic, bright CuInS2 quantum dots as Cd-free fluorescent labels in quantitative immunoassay. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:7567-7575. [PMID: 24892375 DOI: 10.1021/la501268b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report on the synthesis of core-shell CuInS2/ZnS quantum dots (QDs) in organic solution, their encapsulation with a PEG-containing amphiphilic polymer, and the application of the resulting water-soluble QDs as fluorescent label in quantitative immunoassay. By optimizing the methods for core synthesis and shell growth, CuInS2/ZnS QDs were obtained with a quantum yield of 50% on average after hydrophilization. After conjugation with an aflatoxin B1-protein derivative, the obtained QDs were used as fluorescent labels in microplate immunoassay for the quantitative determination of the mycotoxin aflatoxin B1. QDs-based immunoassay showed higher sensitivity compared to enzyme-based immunoassay.
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Affiliation(s)
- Elena S Speranskaya
- Laboratory of Food Analysis, Faculty of Pharmaceutical Sciences, Ghent University , Harelbekestraat 72, 9000 Gent, Belgium
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Surface Modifications Technology of Quantum Dots Based Biosensors and Their Medical Applications. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2014. [DOI: 10.1016/s1872-2040(14)60753-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Janu L, Stanisavljevic M, Krizkova S, Sobrova P, Vaculovicova M, Kizek R, Adam V. Electrophoretic study of peptide-mediated quantum dot-human immunoglobulin bioconjugation. Electrophoresis 2014; 34:2725-32. [PMID: 23712472 DOI: 10.1002/elps.201300088] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Revised: 03/26/2013] [Accepted: 03/27/2013] [Indexed: 11/07/2022]
Abstract
The bioconjugation of quantum dots (QDs) is a key process in their application for bioanalysis as well as imaging. The coupling of QDs with biologically active molecules such as peptides, nucleic acids, and/or antibodies enables their fluorescent labeling, and therefore, selective and sensitive tracking during the bioanalytical process, however, the efficiency of the labeling and preservation of the biological activity of the bioconjugate have to be considered. In this study, a new approach of the bioconjugation of CdTe-QDs and human immunoglobulin employing a small peptide is described. The heptapeptide (HWRGWVC) was synthesized and characterized by mass spectrometry, liquid chromatography, and capillary electrophoresis. Moreover, the peptide was used as a capping agent for QDs synthesis. The CdTe-QDs were synthesized by microwave synthesis (600 W, 20 min) using 3.2 mM CdCl2 and 0.8 mM Na2TeO3. The bioconjugation of QDs capped by this peptide with immunoglobulin was investigated by capillary electrophoresis and magnetic immunoextraction coupled with electrochemical detection by differential pulse voltammetry. Furthermore, the applicability of prepared bioconjugates for fluorescent immunodetection was verified using immobilized goat antihuman IgG antibody.
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Zhang J, Zhao SQ, Zhang K, Zhou JQ. Cd-doped ZnO quantum dots-based immunoassay for the quantitative determination of bisphenol A. CHEMOSPHERE 2014; 95:105-110. [PMID: 24034823 DOI: 10.1016/j.chemosphere.2013.08.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 08/01/2013] [Accepted: 08/08/2013] [Indexed: 06/02/2023]
Abstract
Bisphenol A (BPA) is a ubiquitous environmental contaminant in food products and aquatic ecosystems. Its endocrine and developmental toxicity presents a serious concern to human health and an effective high-throughput method for its detection is desirable. In this paper, water-soluble quantum dots (QDs) have been conjugated covalently with BPA antibodies and the conjugate has been utilized in a competitive fluorescence-linked immunoassay (FLISA). Cd-doped ZnO QDs were functionalized with poly(amidoamine) (PAMAM) dendrimers, as evidenced by ultraviolet absorption spectrum and fluorescence emission spectra analyses, and this led to their successful transfer into aqueous solution. Biological mass spectrometry demonstrated that the bisphenol A antibodies were successfully coupled to the water-soluble QDs, and the structures of these conjugates kept intact. The FLISA method allowed for BPA determination in a linear working range of 20.8-330.3 ng mL(-1) with the limit of detection (LOD) of 13.1 ng mL(-1). The recoveries of BPA from water samples were from 85.92% to 109.62%. In conclusion, a rapid and sensitive FLISA was developed by utilizing novel QD coupling method and validated for use in aqueous samples.
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Affiliation(s)
- Jun Zhang
- Department of Pharmaceutical Engineering, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
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Luo Y, Liu X, Jiang T, Liao P, Fu W. Dual-aptamer-based biosensing of toxoplasma antibody. Anal Chem 2013; 85:8354-60. [PMID: 23899133 DOI: 10.1021/ac401755s] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A panel of seven aptamers to antitoxoplasma IgG is first discovered in this report. The aptamers are selected using systematic evolution of ligands by exponential enrichment (SELEX) technology, cloned, and identified by sequencing and affinity assay. Among them, two aptamers (TGA6 and TGA7) with the highest affinities are employed as capture probe and detection probe in developing a quantum dots-labeled dual aptasensor (Q-DAS). In the presence of antitoxoplasma IgG, an aptamer-protein-aptamer sandwich complex (TGA6-IgG-TGA7) is formed and captured on a multiwell microplate, whose fluorescence can be read out using quantum dots as the fluorescence label, ensuring highly sensitive and specific sensing of antitoxoplasma IgG. The operating characteristics of the proposed assay are guaranteed using dual aptamers as the recognizing probes when compared with antibody-based immunoassay. Q-DAS has a linearity within the range of 0.5-500 IU with a lowest detection of 0.1 IU. Receiver operating curves of 212 clinical samples show a 94.8% sensitivity and 95.7% specificity when the cutoff value is set as 6.5 IU, indicating the proposed Q-DAS is a promising assay in large-scale screening of toxoplasmosis.
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Affiliation(s)
- Yang Luo
- Department of Laboratory Medicine, Southwest Hospital, the Third Military Medical University, Chong Qing 400038, China
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Luo Y, Wang C, Jiang T, Zhang B, Huang J, Liao P, Fu W. Interference-free determination of ischemia-modified albumin using quantum dot coupled X-ray fluorescence spectroscopy. Biosens Bioelectron 2013; 51:136-42. [PMID: 23948244 DOI: 10.1016/j.bios.2013.07.046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 07/22/2013] [Indexed: 11/25/2022]
Abstract
Ischemia-modified protein (IMA) is the most sensitive diagnostic biomarker of ischemic heart disease, but differentiation of IMA from human serum albumin (HSA), a ubiquitous serum protein, is still challenging owing to the shared antigenicity. In this investigation, we developed a rapid and interference-free approach for IMA determination using quantum dots-coupled X-ray Fluorescence Spectroscopy (Q-XRF). In a typical Q-XRF assay, serum total HSA is quantified using quantum dot-coupled sandwich immunoassay, and intact HSA (iHSA) is determined using a XRF spectroscopy, by measuring XRF intensity of Co (II) bonded to iHSA. IMA concentration is automatically determined within 30 min by calculating the difference between total HSA and iHSA. This strategy can effectively eliminate the interference from native HSA level. Results show that no significant influences have been observed from hemolysis or high levels of cholesterol (7 mg/L), triglyceride (5.2 mg/L), IgG (10 g/L), and fibrinogen (4 g/L). A linearity of 1-100mg/mL is obtained in iHSA determination using XRF (r(2)=0.979). The proposed Q-XRF assay demonstrates a lowest detection limit of 0.05 U/mL. Receiver-operating characteristic (ROC) curves reveal that Q-XRF assay provide an improved sensitivity than ACB assay (95.9% vs. 82.9%) in differentiating ischemic patients from health individuals, at an optimal cutoff point of 79.2U/mL. The proposed approach provides a new strategy for interference-free, simple and rapid evaluation of IMA concentration by combining sandwich immunoassay and XRF spectroscopy.
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Affiliation(s)
- Yang Luo
- Department of Laboratory Medicine, Southwest Hospital, the Third Military Medical University, Chong Qing 400038, China.
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Samir TM, Mansour MMH, Kazmierczak SC, Azzazy HME. Quantum dots: heralding a brighter future for clinical diagnostics. Nanomedicine (Lond) 2013; 7:1755-69. [PMID: 23210715 DOI: 10.2217/nnm.12.147] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Quantum dots (QDs) are semiconductor nanocrystals that possess unique optical properties including broad-range excitation, size-tunable narrow emission spectra and high photostability, giving them considerable value in various biomedical applications. The size and composition of QDs can be varied to obtain the desired emission properties and make them amenable to simultaneous detection of multiple targets. Furthermore, numerous surface functionalizations can be used to adapt QDs to the needed application. The successful use of QDs has been reported in the areas of in vitro diagnostics and imaging. There is also potential for multimodal applications for simultaneous imaging. Toxicity issues are still a prime concern with regards to in vivo applications on account of the toxic constituents of QDs.
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Affiliation(s)
- Tamer M Samir
- Yousef Jameel Science & Technology Research Center, The American University in Cairo, New Cairo, Egypt
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Prasad S, Selvam AP, Reddy RK, Love A. Silicon Nanosensor for Diagnosis of Cardiovascular Proteomic Markers. ACTA ACUST UNITED AC 2013; 18:143-51. [DOI: 10.1177/2211068212460038] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Characterization of the ovine complement 4 binding protein-beta (C4BPB) chain as a serum biomarker for enhanced diagnosis of sheep scab. Mol Cell Probes 2013; 27:158-63. [PMID: 23542335 DOI: 10.1016/j.mcp.2013.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 03/18/2013] [Accepted: 03/18/2013] [Indexed: 11/23/2022]
Abstract
Sheep scab, caused by the highly contagious mite Psoroptes ovis, is endemic in a number of sheep-producing countries worldwide, and is a major animal welfare and economic concern. Recent developments in the diagnosis of sheep scab include a highly sensitive and specific serum antibody-based assay which can be used to indicate exposure to the parasite but not necessarily current disease status. Here, a transcriptomic and bioinformatics analysis of the circulating leukocytes of sheep with active P. ovis infestation indicated that the transcription levels of complement 4 binding protein beta (C4BPB) increased by 12 fold from pre-infestation to 6 weeks post-infestation. Semi-quantitative studies confirmed increased serum C4BPB protein levels in sheep infested with P. ovis. To quantify this serum protein response and characterize ovine C4BPB as a biomarker for active P. ovis infestation, the ovine C4BPB gene was sequenced, a recombinant protein expressed, antibodies against this protein were raised in rabbits and a sandwich ELISA developed. The results from this assay indicated that serum C4BPB protein levels increased 4-fold from pre-infestation to 6 weeks post-infestation, which demonstrated the potential of the assay to quantify C4BPB in sheep sera and indicated the potential of C4BPB as a biomarker of current disease status in sheep post-infestation and post-treatment.
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Wu HF, Gopal J, Abdelhamid HN, Hasan N. Quantum dot applications endowing novelty to analytical proteomics. Proteomics 2013; 12:2949-61. [PMID: 22930415 DOI: 10.1002/pmic.201200295] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review surveys all the state-of-art applications of quantum dots (QDs) in conventional and modern analytical methods in proteomic studies. A brief introduction of QDs and their properties is initially presented followed by outlining the application of QDs in fluorescence, MS, imaging, and cancer-based proteomics. The in-depth application of QDs in MALDI-MS and surface assisted laser desorption/ionization-MS has been elaborately discussed, summarizing the speculated mechanism behind the protein-QDs interactions during QD matrix applications leading to enhanced detection sensitivity.
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Affiliation(s)
- Hui-Fen Wu
- Department of Chemistry, National Sun Yat Sen University, Kaohsiung, Taiwan.
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Morales-Narváez E, Montón H, Fomicheva A, Merkoçi A. Signal Enhancement in Antibody Microarrays Using Quantum Dots Nanocrystals: Application to Potential Alzheimer’s Disease Biomarker Screening. Anal Chem 2012; 84:6821-7. [DOI: 10.1021/ac301369e] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eden Morales-Narváez
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, 08193, Bellaterra, Barcelona, Spain
- Polytechnic University of Catalonia, ESAII department, 08028, Barcelona, Spain
| | - Helena Montón
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, 08193, Bellaterra, Barcelona, Spain
- Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Anna Fomicheva
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, 08193, Bellaterra, Barcelona, Spain
- Autonomous University of Barcelona, 08193, Bellaterra, Barcelona, Spain
| | - Arben Merkoçi
- Nanobioelectronics & Biosensors Group, Catalan Institute of Nanotechnology, 08193, Bellaterra, Barcelona, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), 08010, Barcelona,
Spain
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