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Site-specific labeling of antibodies with quantum dots could promote to retain the antigen binding capacity of antibodies. Food Chem 2023; 413:135655. [PMID: 36796266 DOI: 10.1016/j.foodchem.2023.135655] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 01/20/2023] [Accepted: 02/06/2023] [Indexed: 02/10/2023]
Abstract
A major concern with antibody labeling is the decreased antigen affinity binding capacity of antibodies, owing mainly to the randomly oriented binding of the marker. Herein, a universal approach for site-specific photocrosslinking of quantum dots (QDs) to the Fc-terminal of antibodies was investigated utilizing antibody Fc-terminal affinity proteins. Results showed that the QDs only bound to the heavy chain of the antibody. Further comparative tests confirmed that the site-specific directed labeling approach maximizes the retention of the antigen-binding capacity of the natural antibody. Compared with the commonly employed random orientation labeling approach, the directional labeling approach allows the labeled antibody showed 6 times greater binding affinity to antigen. QDs-labeled monoclonal antibodies were applied to fluorescent immunochromatographic test strips for the detection of shrimp tropomyosin (TM). The established procedure has a detection limit of 0.054 μg/mL. Thus, the site-specific labeling approach significantly improves the antigen binding capacity of the labeled antibody.
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2
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Li R, Zhang Y, Zhao J, Wang Y, Wang H, Zhang Z, Lin H, Li Z. Quantum-dot-based sandwich lateral flow immunoassay for the rapid detection of shrimp major allergen tropomyosin. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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3
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Li R, Shu M, Tian Y, Tian J, He Y, Song Z, Wang R, Liu J, Yu B. Quantum dots combined with a fluorescence-linked immunosorbent assay for detecting the metabolic balance of DT-13 excretion in rats. J Pharm Biomed Anal 2020; 190:113508. [PMID: 32798918 DOI: 10.1016/j.jpba.2020.113508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/27/2020] [Accepted: 07/25/2020] [Indexed: 01/07/2023]
Abstract
Saponin monomer 13 of the dwarf lilyturf tuber (DT-13) is a steroidal saponin component isolated from the tuber of Liriope muscari (Decne.) Bailey that exhibits multiple pharmacological activities. We used a liquid chromatography-tandem mass spectrometry method and MetaboLynx XS software to investigate the metabolites of DT-13 in vivo and obtained potential metabolites and changes in functional groups during the formation of metabolites from the substrate. The main metabolites obtained had the ruscogenin (RUS) backbone structure. We also report a competitive fluorescence-linked immunosorbent assay (FLISA) based on monoclonal antibodies (MABS) conjugated with quantum dots (QDs) for rapid and sensitive quantitative analysis of DT-13 and its metabolite levels in biological samples. Using this method, the DT-13 levels detected in rat urine and feces displayed a good linear relationship within the corresponding linear ranges. The DT-13 recovery rate ranged from 85.28 to 101.40%, with a relative standard deviation of 2.96-9.26%. The method was successfully applied to study the distribution of DT-13 excretion in rats after oral administration. DT-13 was primarily excreted in the urine after metabolism. This study provides a new tool for pharmacokinetic studies of DT-13 and other active substances for which the analysis efficacy does not match the bioavailability or that are difficult to study using isotope labeling.
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Affiliation(s)
- Ruiming Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China; State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Menglin Shu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Ye Tian
- State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Jiefeng Tian
- State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Yi He
- State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Zhaohui Song
- State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Ruijing Wang
- State Key Laboratory of Critical Technology in Innovative Chinese Medicine, Tasly Pharmaceutical Group Co Ltd, Tianjin, China
| | - Jihua Liu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China
| | - Boyang Yu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing, China.
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Li S, Zhang Q, Chen M, Zhang X, Liu P. Determination of veterinary drug residues in food of animal origin: Sample preparation methods and analytical techniques. J LIQ CHROMATOGR R T 2020. [DOI: 10.1080/10826076.2020.1798247] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Shuling Li
- Department of Hygiene Detection, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qiongyao Zhang
- Department of Hygiene Detection, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Mengdi Chen
- Department of Hygiene Detection, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xuejiao Zhang
- Department of Hygiene Detection, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Ping Liu
- Department of Hygiene Detection, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
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Wang Y, Li Z, Lin H, Siddanakoppalu PN, Zhou J, Chen G, Yu Z. Quantum-dot-based lateral flow immunoassay for the rapid detection of crustacean major allergen tropomyosin. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.106714] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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7
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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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8
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A Novel Fluoroimmunoassay for Detecting Ruscogenin with Monoclonal Antibodies Conjugated with CdSe/ZnS Quantum Dots. Molecules 2017; 22:molecules22081250. [PMID: 28933731 PMCID: PMC6152124 DOI: 10.3390/molecules22081250] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/20/2017] [Accepted: 07/23/2017] [Indexed: 11/18/2022] Open
Abstract
Ruscogenin (RUS) is a steroidal sapogenin found in Ruscus aculeatus and Ophiopogon japonicus with several pharmacological activities. In the work reported herein, a novel method termed competitive fluorescence-linked immunosorbent assay (cFLISA) based on monoclonal antibodies (mAbs) coupled with quantum dots (QDs) was developed for the quick and sensitive determination of RUS in biological samples. The mAbs against RUS were conjugated with CdSe/ZnS QDs by the crossing-linking reagents and an indirect cFLISA method was developed. There was a good linear relationship between inhibition efficiency and logarithm concentration of RUS which was varied from 0.1 to 1000 ng/mL. The IC50 and limit of detection (LOD) were 9.59 ng/mL and 0.016 ng/mL respectively, which much lower than the enzyme-linked immunosorbent assay (ELISA) method. The recoveries in plasma and tissues were ranged from 82.3% to 107.0% and the intra- and inter-day precision values were below 15%. The developed cFLISA has been successfully applied to the measurement of the concentrations of RUS in biological samples of rats, and showed great potential for the tissue distribution study of RUS. The cFLISA method may provide a valuable tool for the analysis of small molecules in biological samples and such an approach could be applied to other natural products.
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Yao J, Xing G, Han J, Sun Y, Wang F, Deng R, Hu X, Zhang G. Novel fluoroimmunoassays for detecting ochratoxin A using CdTe quantum dots. JOURNAL OF BIOPHOTONICS 2017; 10:657-663. [PMID: 27243787 DOI: 10.1002/jbio.201600005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 04/21/2016] [Accepted: 05/08/2016] [Indexed: 06/05/2023]
Abstract
Novel direct and indirect competitive fluorescence-linked immunosorbent assays (cFLISA and icFLISA) for detection of ochratoxin A (OTA) were described using CdTe quantum dots (QDs) as fluorescent label. CdTe QDs were successfully synthesized, which had an emission wavelength of 615 nm. The high purity monoclonal antibody against OTA was prepared through cell thawing and the octylic acid-ammonium sulfate method. The OTA MAbs were successfully coupled with CdTe QDs, and which also retained the original biological activity. The 50% inhibition values (IC50 ) of the cFLISA and icFLISA were 0.630 ng/mL, 0.234 ng/mL, the limits of detection (LOD) were 7.06 × 10-3 and 4.15 × 10-3 ng/mL, and detection ranges were 7.06 × 10-3 - 18.34 ng/mL and 4.15 × 10-3 - 4.88 ng/mL, in-order. The recoveries were 96.0-104.7% along with coefficients of variation (CVs) below 10%. The FLISA provided novel method for determination of OTA and the potential of MAb-CdTe QDs for the establishment of fluorescent immunochromatographic test strip.
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Affiliation(s)
- Jingjing Yao
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Guangxu Xing
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Junling Han
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang, 453100, China
| | - Yaning Sun
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Fangyu Wang
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Ruiguang Deng
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Xiaofei Hu
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
| | - Gaiping Zhang
- Henan Academy of Agriculture Science/Key laboratory of animal Immunology, Ministry of Agriculture/Henan key laboratory of animal Immunology, Zhengzhou, 450002, China
- Henan Agricultural University, Zhengzhou, 450002, China
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Wang J, Yang L, Liu L, Wu H, Wang J, Jiang P, Jiang X, Qiu L. Investigation of multivalent interactions between conjugate of quantum dots with c-Myc peptide tag and the anti-c-Myc antibody by capillary electrophoresis with fluorescence detection. J Sep Sci 2016; 39:4653-4659. [DOI: 10.1002/jssc.201600931] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 09/18/2016] [Accepted: 09/24/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Jianhao Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Li Yang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Li Liu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Hao Wu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Jianpeng Wang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
| | - Pengju Jiang
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
- Key Laboratory of Synthetic Biology, Shanghai Institutes for Biological Sciences; Chinese Academy of Sciences; Shanghai People's Republic of China
| | - Xiyuan Jiang
- Kunshan affiliated Hospital of Nanjing University of Chinese Medicine; Kunshan Jiangsu People's Republic of China
| | - Lin Qiu
- School of Pharmaceutical Engineering and Life Science; Changzhou University; Changzhou Jiangsu People's Republic of China
- State Key Laboratory of Coordination Chemistry; Nanjing University; Nanjing Jiangsu People's Republic of China
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12
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Abstract
At this post-genomic era, the focus of life science research has shifted from life genetic information to general biofunctions. Biomolecular sensors based on QDs will play an important role in the identification and detection of biomolecules.
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Affiliation(s)
| | - Jinzhi Lv
- Shanxi Normal University
- Linfen 041004
- PR China
| | - Yan Li
- Shanxi Normal University
- Linfen 041004
- PR China
| | - Guiqin Yan
- Shanxi Normal University
- Linfen 041004
- PR China
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Zhang Z, Li Y, Li P, Zhang Q, Zhang W, Hu X, Ding X. Monoclonal antibody-quantum dots CdTe conjugate-based fluoroimmunoassay for the determination of aflatoxin B1 in peanuts. Food Chem 2014; 146:314-9. [DOI: 10.1016/j.foodchem.2013.09.048] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 09/06/2013] [Accepted: 09/08/2013] [Indexed: 11/29/2022]
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14
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Sang F, Huang X, Ren J. Characterization and separation of semiconductor quantum dots and their conjugates by capillary electrophoresis. Electrophoresis 2014; 35:793-803. [DOI: 10.1002/elps.201300528] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Fuming Sang
- School of Marine Science and Technology; Harbin Institute of Technology; Weihai P. R. China
| | - Xiangyi Huang
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
| | - Jicun Ren
- College of Chemistry & Chemical Engineering; State Key Laboratory of Metal Matrix Composites; Shanghai Jiaotong University; Shanghai P. R. China
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15
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Wu J, Xu F, Zhu K, Wang Z, Wang Y, Zhao K, Li X, Jiang H, Ding S. Rapid and Sensitive Fluoroimmunoassay Based on Quantum Dots for Detection of Melamine in Milk. ANAL LETT 2013. [DOI: 10.1080/00032719.2012.713066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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16
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Au GHT, Shih WY, Shih WH. High-conjugation-efficiency aqueous CdSe quantum dots. Analyst 2013; 138:7316-25. [DOI: 10.1039/c3an01198d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Applications of quantum dots as probes in immunosensing of small-sized analytes. Biosens Bioelectron 2012; 41:12-29. [PMID: 23079338 DOI: 10.1016/j.bios.2012.09.025] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 09/11/2012] [Accepted: 09/17/2012] [Indexed: 01/23/2023]
Abstract
Quantum dots (QDs) are semiconductor nanoparticles with very interesting optical properties, like high quantum yield or narrow and size-tuneable fluorescence spectra. Current applications of QDs are widespread, their use as fluorescence labels in bioassays being one of the most promising. These nanoparticles are usually conjugated to highly specific biomolecules like antibodies, oligonucleotides, enzymes or aptamers to improve assay selectivity. In this review, QD surface passivation, conjugation to biomolecules, and purification strategies are discussed with special emphasis to the development of QD-based immunoassays for the detection of low molecular weight compounds given the relevance of this sort of analytes in health, food safety, pharmaceutical, or environmental monitoring areas. The aim of this review is to summarise the main achievements attained so far and to initialise researchers in the field of antibody-based assays employing QDs as labels, such as fluorescence-linked immunosorbent assay (FLISA), fluorescence (or Förster) resonance energy transfer (FRET), immunochromatographic methods, and immunosensors.
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Nanomedicine and veterinary science: the reality and the practicality. Vet J 2012; 193:12-23. [PMID: 22365842 DOI: 10.1016/j.tvjl.2012.01.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Revised: 12/20/2011] [Accepted: 01/03/2012] [Indexed: 01/04/2023]
Abstract
Nanomedicine is a rapidly expanding field with a promising future that is already permeating veterinary science. This review summarises the current applications for nanoparticles in human medicine and explores their potential applicability for veterinary use. The principles underlying the use of nanoparticles in drug delivery, imaging and as vaccine adjuvants are explored along with the unique issues surrounding nanoparticle toxicity and regulatory approval. A brief overview of the properties of different nanoparticle systems including, liposomes, micelles, emulsions and inorganic nanoparticles, is provided, along with a description of their current and potential future applications in veterinary medicine.
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Wang YF, Wang DN, Zou MQ, Jin Y, Yun CL, Gao XW. Application of Suspension Array for Simultaneous Detection of Antibiotic Residues in Raw Milk. ANAL LETT 2011. [DOI: 10.1080/00032719.2011.553012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Ayyar BV, Arora S, Murphy C, O'Kennedy R. Affinity chromatography as a tool for antibody purification. Methods 2011; 56:116-29. [PMID: 22033471 DOI: 10.1016/j.ymeth.2011.10.007] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 10/11/2011] [Accepted: 10/12/2011] [Indexed: 11/29/2022] Open
Abstract
The global antibody market has grown exponentially due to increasing applications in research, diagnostics and therapy. Antibodies are present in complex matrices (e.g. serum, milk, egg yolk, fermentation broth or plant-derived extracts). This has led to the need for development of novel platforms for purification of large quantities of antibody with defined clinical and performance requirements. However, the choice of method is strictly limited by the manufacturing cost and the quality of the end product required. Affinity chromatography is one of the most extensively used methods for antibody purification, due to its high selectivity and rapidity. Its effectiveness is largely based on the binding characteristics of the required antibody and the ligand used for antibody capture. The approaches used for antibody purification are critically examined with the aim of providing the reader with the principles and practical insights required to understand the intricacies of the procedures. Affinity support matrices and ligands for affinity chromatography are discussed, including their relevant underlying principles of use, their potential value and their performance in purifying different types of antibodies, along with a list of commercially available alternatives. Furthermore, the principal factors influencing purification procedures at various stages are highlighted. Practical considerations for development and/or optimizations of efficient antibody-purification protocols are suggested.
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Affiliation(s)
- B Vijayalakshmi Ayyar
- Biomedical Diagnostics Institute, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland
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22
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Meng M, Xi R. Review: Current Development of Immunoassay for Analyzing Veterinary Drug Residue in Foods and Food Products. ANAL LETT 2011. [DOI: 10.1080/00032719.2011.551863] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Klepárník K, Voráčová I, Lišková M, Přikryl J, Hezinová V, Foret F. Capillary electrophoresis immunoassays with conjugated quantum dots. Electrophoresis 2011; 32:1217-23. [PMID: 21500216 DOI: 10.1002/elps.201000652] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 01/12/2011] [Accepted: 01/12/2011] [Indexed: 11/06/2022]
Abstract
Water-soluble CdTe quantum dots (QDs) and their conjugates with antibodies and antigenes were prepared by optimized procedures for applications in CE immunoassays. The QD size of 3.5 nm, excitation spectrum in the range of 300-500 nm, the maximum wavelength of the emission spectrum at 610 nm, quantum yield of 0.25 and luminescence lifetimes in the range of 3.6-43 ns were determined. The 0.1 M solution of TRIS/TAPS (pH 8.3) was found to be the optimum buffer for the separation of the antiovalbumin-ovalbumin immunocomplex from the free conjugates of QDs.
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Affiliation(s)
- Karel Klepárník
- Institute of Analytical Chemistry, Czech Academy of Sciences, Brno, Czech Republic.
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Zhu K, Li J, Wang Z, Jiang H, Beier RC, Xu F, Shen J, Ding S. Simultaneous detection of multiple chemical residues in milk using broad-specificity antibodies in a hybrid immunosorbent assay. Biosens Bioelectron 2011; 26:2716-9. [DOI: 10.1016/j.bios.2010.09.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Revised: 09/06/2010] [Accepted: 09/06/2010] [Indexed: 10/19/2022]
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Abstract
Quantum dots (QDs) are novel photostable semiconductor nanocrystals possessing wide excitation spectra and narrow, symmetrical emission spectra and can be conjugated to a wide range of biological targets, including proteins, antibodies and nucleic acid probes. These characteristics have provoked considerable interest in their use for bioimaging. Much investigation has been performed into their use for multiplex immunohistochemistry and in situ hybridisation which, when combined with multispectral imaging, has enabled quantitation and colocalisation of gene expression in clinical tissue. Many advances have recently been made using QDs for live cell and in vivo imaging, in which QD-labelled molecules can be tracked and visualised in 3-D. This review aims to outline the beneficial properties presented by QDs along with important advances in their biological application.
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Affiliation(s)
- Richard J Byers
- School of Cancer and Enabling Sciences, University of Manchester, Manchester, UK.
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Composite of CdTe quantum dots and molecularly imprinted polymer as a sensing material for cytochrome c. Biosens Bioelectron 2010; 26:2553-8. [PMID: 21145227 DOI: 10.1016/j.bios.2010.11.004] [Citation(s) in RCA: 182] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 10/29/2010] [Accepted: 11/07/2010] [Indexed: 11/20/2022]
Abstract
A newly designed molecularly imprinted polymer (MIP) material was fabricated and successfully utilized as recognition element to develop a quantum dots (QDs) based MIP-coated composite for selective recognition of the template cytochrome c (Cyt). The composites were synthesized by sol-gel reaction (imprinting process). The imprinting process resulted in an increased affinity of the composites toward the corresponding template. The fluorescence of MIP-coated QDs was stronger quenched by the template versus that of non-imprinted polymer (NIP)-coated QDs, which indicated the composites could recognize the corresponding template. The results of specific experiments further exhibited the recognition ability of the composites. Under optimum conditions, the linear range for Cyt is from 0.97 μM to 24 μM, and the detection limit is 0.41 μM. The new composites integrated the high selectivity of molecular imprinting technology and fluorescence property of QDs and could convert the specific interactions between imprinted cavities and corresponding template to the obvious changes of fluorescence signal. Therefore, a simple and selective sensing system for protein recognition has been realized.
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Chen Y, Ren HL, Liu N, Sai N, Liu X, Liu Z, Gao Z, Ning BA. A fluoroimmunoassay based on quantum dot-streptavidin conjugate for the detection of chlorpyrifos. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:8895-8903. [PMID: 23654227 DOI: 10.1021/jf101778t] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A rapid and sensitive competitive fluorescence-linked immunosorbent assay (cFLISA) based on quantum dot-streptavidin conjugate (QDs-SA) was developed for the detection of chlorpyrifos in drinking water. The QDs-SA conjugate, which consists of 3-mercaptopropyl acid-stabilized CdTe nanoparticle QDs and streptavidin (SA) made through the active ester method, was employed to improve the sensitivity of QDs-SA-cFLISA. The 50% inhibition concentration (IC50) and the limit of detection (LOD) were 28.5 and 3.8 ng mL(-1), respectively. QDs-SA-cFLISA increased sensitivity 5.5-fold and reduced detection time by 1 h compared with conventional enzyme-linked immunosorbent assay (ELISA). With chlorpyrifos concentrations of 100, 50, and 20 ng mL(-1), recoveries ranged from 85.9% to 105.3% with coefficients of variation ranging from 6.3% to 13.5%. This study demonstrated that QDs-SA-cFLISA was more rapid and sensitive than conventional ELISA. Therefore, it can be used as a novel screening method for the detection of pesticide residues.
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Affiliation(s)
- Yiping Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China
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28
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Chen YP, Ning B, Liu N, Feng Y, Liu Z, Liu X, Gao ZX. A rapid and sensitive fluoroimmunoassay based on quantum dot for the detection of chlorpyrifos residue in drinking water. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2010; 45:508-515. [PMID: 20574871 DOI: 10.1080/03601234.2010.493476] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A rapid and sensitive indirect competitive fluorescence-linked immunosorbent assay (cFLISA) method based on quantum dots as the fluorescence label coupled with secondary antibody (Ab(2)) for the detection of chlorpyrifos in drinking water has been developed. The cFLISA method allowed for chlorpyrifos determination in a liner working range of 15.2-205.5 ng mL(-1). The 50 % inhibition value (IC(50)) and the limit of detection (LOD) of the cFLISA were 50.2 ng mL(-1) and 8.4 ng mL(-1), while the IC(50) and the LOD of the conventional enzyme linked immunosorbent assay (ELISA) were 95.3 ng- mL(-1) and 16.2 ng mL(-1), respectively. When the concentrations of chlorpyrifos were 200, 100 and 50 ng mL(-1), the recoveries ranged from 90.8 % to 108.2 % with a coefficient of variation (CV) of 7.5 %-15.2 %. In water sample analysis, the results of cFLISA were similar to those obtained from a cELISA and a high performance liquid chromatography (HPLC) method, while the detection time by cFLISA was reduced 0.5 h compared with ELISA. It showed that cFLISA could be used as a new screening method for the detection of pesticide residue.
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Affiliation(s)
- Yi Ping Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan, China
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29
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Chen L, Sheng Z, Zhang A, Guo X, Li J, Han H, Jin M. Quantum-dots-based fluoroimmunoassay for the rapid and sensitive detection of avian influenza virus subtype H5N1. LUMINESCENCE 2009; 25:419-23. [DOI: 10.1002/bio.1167] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 05/25/2009] [Accepted: 06/20/2009] [Indexed: 11/09/2022]
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30
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Chen W, Xu D, Liu L, Peng C, Zhu Y, Ma W, Bian A, Li Z, Jin Z, Zhu S, Xu C, Wang L. Ultrasensitive Detection of Trace Protein by Western Blot Based on POLY-Quantum Dot Probes. Anal Chem 2009; 81:9194-8. [DOI: 10.1021/ac901429a] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Wei Chen
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Dinghua Xu
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Liqiang Liu
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Chifang Peng
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Yingyue Zhu
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Wei Ma
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Ai Bian
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Zhe Li
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Zhengyu Jin
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Shuifang Zhu
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Chuanlai Xu
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
| | - Libing Wang
- School of Food Science and Technology, State Key Lab of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu Province, China
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31
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Review on immunoanalytical determination of tetracycline and sulfonamide residues in edible products. Anal Bioanal Chem 2009; 395:907-20. [DOI: 10.1007/s00216-009-2901-y] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2009] [Revised: 05/25/2009] [Accepted: 06/09/2009] [Indexed: 10/20/2022]
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32
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Nesterenko IS, Nokel MA, Eremin SA. Immunochemical methods for the detection of sulfanylamide drugs. JOURNAL OF ANALYTICAL CHEMISTRY 2009. [DOI: 10.1134/s1061934809050025] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Tholouli E, Sweeney E, Barrow E, Clay V, Hoyland JA, Byers RJ. Quantum dots light up pathology. J Pathol 2008; 216:275-85. [PMID: 18814189 DOI: 10.1002/path.2421] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Quantum dots (QDs) are novel nanocrystal fluorophores with extremely high fluorescence efficiency and minimal photobleaching. They also possess a constant excitation wavelength together with sharp and symmetrical tunable emission spectra. These unique optical properties make them near-perfect fluorescent markers and there has recently been rapid development of their use for bioimaging. QDs can be conjugated to a wide range of biological targets, including proteins, antibodies, and nucleic acid probes, rendering them of particular interest to pathology researchers. They have been used in multiplex immunohistochemistry and in situ hybridization, which when combined with multispectral imaging, has enabled quantitative measurement of gene expression in situ. QDs have also been used for live in vivo animal imaging and are now being applied to an ever-increasing range of biological problems. These are detailed in this review, which also acts to outline the important advances that have been made in their range of applications. The relative novelty of QDs can present problems in their practical use and guidelines for their application are given.
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Affiliation(s)
- E Tholouli
- Department of Clinical Haematology, Manchester Royal Infirmary, Oxford Road, Manchester, UK
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