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Shirani E, Razmjou A, Asadnia M, Nordon RE, Inglis DW. Surface Modification of Polystyrene with Boronic Acid for Immunoaffinity-Based Cell Enrichment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4361-4372. [PMID: 38357828 DOI: 10.1021/acs.langmuir.3c03644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Obtaining an enriched and phenotypically pure cell population from heterogeneous cell mixtures is important for diagnostics and biosensing. Existing techniques such as fluorescent-activated cell sorting (FACS) and magnetic-activated cell sorting (MACS) require preincubation with antibodies (Ab) and specialized equipment. Cell immunopanning removes the need for preincubation and can be done with no specialized equipment. The majority of the available antibody-mediated analyte capture techniques require a modification to the Abs for binding. In this work, no antibody modification is used because we take advantage of the carbohydrate chain in the Fc region of Ab. We use boronic acid as a cross-linker to bind the Ab to a modified surface. The process allows for functional orientation and cleavable binding of the Ab. In this study, we created an immunoaffinity matrix on polystyrene (PS), an inexpensive and ubiquitous plastic. We observed a 37% increase in Ab binding compared with that of a passive adsorption approach. The method also displayed a more consistent antibody binding with 17 times less variation in Ab loading among replicates than did the passive adsorption approach. Surface topography analysis revealed that a dextran coating reduced nonspecific antibody binding. Elemental analysis (XPS) was used to characterize the surface at different stages and showed that APBA molecules can bind upside-down on the surface. While upside-down antibodies likely remain functional, their elution behavior might differ from those bound in the desired way. Cell capture experiments show that the new surface has 43% better selectivity and 2.4-fold higher capture efficiency compared to a control surface of passively adsorbed Abs. This specific surface chemistry modification will allow the targeted capture of cells or analytes with the option of chemical detachment for further research and characterization.
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Affiliation(s)
- Elham Shirani
- School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Amir Razmjou
- Mineral Recovery Research Center (MRRC), School of Engineering, Edith Cowan University, Joondalup, Perth, Western Australia 6027, Australia
| | - Mohsen Asadnia
- School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
| | - Robert E Nordon
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - David W Inglis
- School of Engineering, Macquarie University, Sydney, New South Wales 2109, Australia
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2
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Martinez B, Leroux YR, Hapiot P, Henry CS. Surface Modification of Thermoplastic Electrodes for Biosensing Applications via Copper-Catalyzed Click Chemistry. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37874977 DOI: 10.1021/acsami.3c10013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Cu(I)-catalyzed 1,3-dipolar cycloaddition (CuAAC), also known as click chemistry, has been demonstrated to be highly robust while providing versatile surface chemistry. One specific application is biosensor fabrication. Recently, we developed thermoplastic electrodes (TPEs) as an alternative to traditional carbon composite electrodes in terms of cost, performance, and robustness. However, their applications in biosensing are currently limited due to a lack of facile methods for electrode modification. Here, we demonstrate the feasibility of using CuAAC following the diazonium grafting of TPEs to take advantage of two powerful technologies for developing a customizable and versatile biosensing platform. After a stepwise characterization of the electrode modification procedures was performed, electrodes were modified with model affinity reagents. Streptavidin and streptavidin-conjugated IgG antibodies were successfully immobilized on the TPE surface, as confirmed by electrochemical impedance spectroscopy and X-ray photoelectron spectroscopy.
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Affiliation(s)
- Brandaise Martinez
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Yann R Leroux
- Univ Rennes, CNRS, ISCR - UMR 6226, F-35000 Rennes, France
| | | | - Charles S Henry
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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3
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Jeon CH, Ha TH. Covalent and Oriented Immobilization of Antibodies through Systematic Modification of Photoactivatable RNA Hybrid Aptamers. Bioconjug Chem 2022; 33:1527-1535. [DOI: 10.1021/acs.bioconjchem.2c00274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chang Hoon Jeon
- Core Research Facility & Analysis Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, South Korea
| | - Tai Hwan Ha
- Core Research Facility & Analysis Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, South Korea
- Department of Nanobiotechnology, KRIBB School of Biotechnology, Korea University of Science and Technology (UST), Daejeon 34113, South Korea
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4
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Szittner Z, Péter B, Kurunczi S, Székács I, Horváth R. Functional blood cell analysis by label-free biosensors and single-cell technologies. Adv Colloid Interface Sci 2022; 308:102727. [DOI: 10.1016/j.cis.2022.102727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 05/25/2022] [Accepted: 06/27/2022] [Indexed: 11/01/2022]
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5
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Wu SY, Wu FG, Chen X. Antibody-Incorporated Nanomedicines for Cancer Therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2109210. [PMID: 35142395 DOI: 10.1002/adma.202109210] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Antibody-based cancer therapy, one of the most significant therapeutic strategies, has achieved considerable success and progress over the past decades. Nevertheless, obstacles including limited tumor penetration, short circulation half-lives, undesired immunogenicity, and off-target side effects remain to be overcome for the antibody-based cancer treatment. Owing to the rapid development of nanotechnology, antibody-containing nanomedicines that have been extensively explored to overcome these obstacles have already demonstrated enhanced anticancer efficacy and clinical translation potential. This review intends to offer an overview of the advancements of antibody-incorporated nanoparticulate systems in cancer treatment, together with the nontrivial challenges faced by these next-generation nanomedicines. Diverse strategies of antibody immobilization, formats of antibodies, types of cancer-associated antigens, and anticancer mechanisms of antibody-containing nanomedicines are provided and discussed in this review, with an emphasis on the latest applications. The current limitations and future research directions on antibody-containing nanomedicines are also discussed from different perspectives to provide new insights into the construction of anticancer nanomedicines.
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Affiliation(s)
- Shun-Yu Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing, 210096, P. R. China
| | - Fu-Gen Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2 Sipailou Road, Nanjing, 210096, P. R. China
| | - Xiaoyuan Chen
- Yong Loo Lin School of Medicine and Faculty of Engineering, National University of Singapore, Singapore, 119077, Singapore
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6
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Bai S, Zhang J, Zhu L, Gong X, Yu L, Sun Y. Characterization of a heptapeptide-modified microsphere for oriented antibody immobilization. J Pept Sci 2022; 28:e3411. [PMID: 35415855 DOI: 10.1002/psc.3411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 11/11/2022]
Abstract
Oriented immobilization of antibodies is important for the effective recognition of target antigens. In this paper, a heptapeptide ligand, HWRGWVC (HC7), was modified onto non-porous mono-sized poly (glyceryl methacrylate) (pGMA) microspheres (named pGMA-HC7) to explore the antibody immobilization behaviors. Characterization of the microspheres by particle size analyzer, scanning electron microscopy, Fourier transform infrared spectroscopy, and reversed-phase chromatography proved the success of each fabrication step. The capacity and activity of antibody immobilization through HC7 were studied using immunoglobulin G (IgG) as a model antibody and horseradish peroxidase (HRP) as a model antigen. Additionally, IgG immobilizations on pGMA microspheres by nonspecific adsorption and covalent coupling through carbodiimide chemistry were conducted for comparison. pGMA-HC7 exhibited an IgG adsorption capacity of 3-4 mg/g in 10 min by the specific binding of HC7 without nonspecific interactions. Notably, the ligand HC7 showed a by two orders of magnitude stronger affinity for IgG than its original hexapeptide ligand HWRGWV. Moreover, the capacity and activity of the immobilized anti-HRP antibody on pGMA-HC7 were 1.6-fold and 3-fold higher than those of the covalent coupling, respectively. The results proved the superior role of HWRGWVC in the affinity binding of antibody and the potential of pGMA-HC7-25 in immunoassay and immunodiagnostic applications.
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Affiliation(s)
- Shu Bai
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
| | - Jie Zhang
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
| | - Liyan Zhu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
| | - Xiaoxing Gong
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
| | - Linling Yu
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
| | - Yan Sun
- Department of Biochemical Engineering, School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology (Ministry of Education), Tianjin University, Tianjin, China
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Balderas-Valadez RF, Pacholski C. Plasmonic Nanohole Arrays on Top of Porous Silicon Sensors: A Win-Win Situation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:36436-36444. [PMID: 34297537 PMCID: PMC10015452 DOI: 10.1021/acsami.1c07034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Label-free optical sensors are attractive candidates, for example, for detecting toxic substances and monitoring biomolecular interactions. Their performance can be pushed by the design of the sensor through clever material choices and integration of components. In this work, two porous materials, namely, porous silicon and plasmonic nanohole arrays, are combined in order to obtain increased sensitivity and dual-mode sensing capabilities. For this purpose, porous silicon monolayers are prepared by electrochemical etching and plasmonic nanohole arrays are obtained using a bottom-up strategy. Hybrid sensors of these two materials are realized by transferring the plasmonic nanohole array on top of the porous silicon. Reflectance spectra of the hybrid sensors are characterized by a fringe pattern resulting from the Fabry-Pérot interference at the porous silicon borders, which is overlaid with a broad dip based on surface plasmon resonance in the plasmonic nanohole array. In addition, the hybrid sensor shows a significant higher reflectance in comparison to the porous silicon monolayer. The sensitivities of the hybrid sensor to refractive index changes are separately determined for both components. A significant increase in sensitivity from 213 ± 12 to 386 ± 5 nm/RIU is determined for the transfer of the plasmonic nanohole array sensors from solid glass substrates to porous silicon monolayers. In contrast, the spectral position of the interference pattern of porous silicon monolayers in different media is not affected by the presence of the plasmonic nanohole array. However, the changes in fringe pattern reflectance of the hybrid sensor are increased 3.7-fold after being covered with plasmonic nanohole arrays and could be used for high-sensitivity sensing. Finally, the capability of the hybrid sensor for simultaneous and independent dual-mode sensing is demonstrated.
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De Rycke E, Stove C, Dubruel P, De Saeger S, Beloglazova N. Recent developments in electrochemical detection of illicit drugs in diverse matrices. Biosens Bioelectron 2020; 169:112579. [PMID: 32947080 DOI: 10.1016/j.bios.2020.112579] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 08/20/2020] [Accepted: 08/31/2020] [Indexed: 01/24/2023]
Abstract
Drug abuse is a global problem, requiring an interdisciplinary approach. Discovery, production, trafficking, and consumption of illicit drugs have been constantly growing, leading to heavy consequences for environment, human health, and society in general. Therefore, an urgent need for rapid, sensitive, portable and easy-to-operate detection methods for numerous drugs of interest in diverse matrices, from police samples, biological fluids and hair to sewage water has risen. Electrochemical sensors are promising alternatives to chromatography and spectrometry. Last decades, electrochemical sensing of illegal drugs has experienced a very significant growth, driven by improved transducers and signal amplifiers helping to improve the sensitivity and selectivity. The present review summarizes recent advances (last 10 years) in electrochemical detection of the most prevailing illicit drugs (such as cocaine, heroin, and (meth)amphetamine), their precursors and derivatives in different matrices. Various electrochemical sensors making use of different transducers with their (dis)advantages were discussed, and their sensitivity and applicability were critically compared. In those cases where natural or synthetic recognition elements were included in the sensing system to increase specificity, selected recognition elements, their immobilization, working conditions, and analytical performance were discussed. Finally, an outlook is presented with suggestions and recommendations for future developments.
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Affiliation(s)
- Esther De Rycke
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium; Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-Bis, B-9000 Ghent, Belgium.
| | - Christophe Stove
- Laboratory of Toxicology, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Peter Dubruel
- Polymer Chemistry & Biomaterials Research Group, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, Building S4-Bis, B-9000 Ghent, Belgium
| | - Sarah De Saeger
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Natalia Beloglazova
- Centre of Excellence in Mycotoxicology and Public Health, Department of Bioanalysis, Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium; Nanotechnology Education and Research Center, South Ural State University, 454080 Chelyabinsk, Russia
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9
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Orlov A, Pushkarev A, Znoyko S, Novichikhin D, Bragina V, Gorshkov B, Nikitin P. Multiplex label-free biosensor for detection of autoantibodies in human serum: Tool for new kinetics-based diagnostics of autoimmune diseases. Biosens Bioelectron 2020; 159:112187. [DOI: 10.1016/j.bios.2020.112187] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 12/18/2022]
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10
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Abstract
Crosslinking of proteins for their irreversible immobilization on surfaces is a proven and popular method. However, many protocols lead to random orientation and the formation of undefined or even inactive by-products. Most concepts to obtain a more targeted conjugation or immobilization requires the recombinant modification of at least one binding partner, which is often impractical or prohibitively expensive. Here a novel method is presented, which is based on the chemical preactivation of Protein A or G with selected conventional crosslinkers. In a second step, the antibody is added, which is subsequently crosslinked in the Fc part. This leads to an oriented and covalent immobilization of the immunoglobulin with a very high yield. Protocols for Protein A and Protein G with murine and human IgG are presented. This method may be useful for the preparation of columns for affinity chromatography, immunoprecipitation, antibodies conjugated to magnetic particles, permanent and oriented immobilization of antibodies in biosensor systems, microarrays, microtitration plates or any other system, where the loss of antibodies needs to be avoided, and maximum binding capacity is desired. This method is directly applicable even to antibodies in crude cell culture supernatants, raw sera or protein-stabilized antibody preparations without any purification nor enrichment of the IgG. This new method delivered much higher signals as a traditional method and, hence, seems to be preferable in many applications.
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11
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Neumann AC, Melnik S, Niessner R, Stoeger E, Knopp D. Microcystin-LR Enrichment from Freshwater by a Recombinant Plant-derived Antibody Using Sol-Gel-Glass Immunoextraction. ANAL SCI 2019; 35:207-214. [PMID: 30318489 DOI: 10.2116/analsci.18p384] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 10/01/2018] [Indexed: 11/23/2022]
Abstract
Eutrophication of water bodies can promote cyanobacterial (blue-green algae) blooms, which has become a source of increasing concern for both recreational and drinking water use. Many bacterial species can produce toxins that pose threats to wildlife, domestic animals and humans. Microcystin-leucine-arginine (MC-LR) is the most frequent and most toxic microcystin congener. For the first time, lab-scale investigations were performed to test the application of a recombinant plant-derived anti-MC-LR antibody immobilized on an immunoaffinity support material to selectively extract the toxin from spiked freshwater samples. As a comparison, its hybridoma-derived counterpart (murine monoclonal antibody) was evaluated. The antibody-doped material was prepared via an optimized sol-gel process; its stability and binding efficiency of MC-LR in spiked freshwater samples were thoroughly tested using the ELISA and orthogonal LC-MS methods. For removal, two column-based procedures with sequential or continuous cyclic sample addition and a suspension mode (moving adsorbent) were tested. Noteworthy the results obtained with a crude antibody fraction were fully compatible with the highly purified preparation. This study paves the way for further investigation being focused on novel applications of plant-derived anti-MC-LR antibodies in bioremediation to selectively deplete the toxin from freshwater: a green and promising technology without secondary pollution.
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Affiliation(s)
- Anna-Cathrine Neumann
- Institute of Hydrochemistry, Chair of Analytical Chemistry, Technical University Munich
| | - Stanislav Melnik
- Department for Applied Genetics and Cell Biology, Molecular Plant Physiology and Crop Biotechnology, University of Natural Resources and Life Sciences
| | - Reinhard Niessner
- Institute of Hydrochemistry, Chair of Analytical Chemistry, Technical University Munich
| | - Eva Stoeger
- Department for Applied Genetics and Cell Biology, Molecular Plant Physiology and Crop Biotechnology, University of Natural Resources and Life Sciences
| | - Dietmar Knopp
- Institute of Hydrochemistry, Chair of Analytical Chemistry, Technical University Munich
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12
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Yang XH, Huan LM, Chu XS, Sun Y, Shi QH. A comparative investigation of random and oriented immobilization of protein A ligands on the binding of immunoglobulin G. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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13
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Film bulk acoustic resonators (FBARs) as biosensors: A review. Biosens Bioelectron 2018; 116:1-15. [DOI: 10.1016/j.bios.2018.05.028] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 05/08/2018] [Accepted: 05/16/2018] [Indexed: 01/01/2023]
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14
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Morejón García G, García de la Rosa I, González Reyes EC, Rubio Torres A, Quintana Guerra JM, Hernández Marín M, Pérez Mora PL, Feal Carballo S, Lafita Delfino Y, Pupo Infante M, Castells Martínez EM, Rosabal Poloshkov A, Hernández Pérez L. Generation of monoclonal antibodies against 17α-hydroxyprogesterone for newborn screening of congenital adrenal hyperplasia. Clin Chim Acta 2018; 485:311-315. [PMID: 30006291 DOI: 10.1016/j.cca.2018.07.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 06/20/2018] [Accepted: 07/09/2018] [Indexed: 10/28/2022]
Abstract
Congenital adrenal hyperplasia (CAH) is an autosomal recessive disorder caused by the deficiency of one of the five enzymes involved in the biosynthesis of corticosteroids. The most common form of the disease is the lack of 21-hydroxylase which provokes an accumulation of high levels of 17α-hydroxyprogesterone (17-OHP), the main biochemical marker for illness detection. Given the significance of neonatal diagnosis for ensuring a timely treatment to patients suffering from CAH, newborn screening is worldwide performed for the determination of 17-OHP from dried blood spots on filter paper. The non-specificity of antisera employed in immunoassays and the cross-reaction with fetal adrenal hormones produce an overestimation in the 17-OHP quantification. Immunization of mice with 17-OHP-3-(O-carboxymethyl) oxime-bovine serum albumin led to the generation of 15 anti-17-OHP IgG1-and-IgG2b-secreting hybridomas. The 6E2G9 monoclonal antibody presents cross-reactivity values similar to those achieved by rabbit antibodies employed in the solid phase of UMELISA® 17-OH Progesterona Neonatal, assay for the newborn screening of CAH in Cuba. Additionally, the use of 6E2G9 in the evaluation of dried blood spots samples from newborns on filter paper showed a decrease in the mean 17-OHP levels, thus demonstrating it can replace the conventional rabbit antisera.
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Affiliation(s)
- Greilys Morejón García
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
| | - Iria García de la Rosa
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba.
| | | | - Anett Rubio Torres
- Center for Biotechnology and Bioengineering (CeBiB), University of Chile, Beaucheff 851, 7(th) floor, Santiago de Chile, Chile
| | - Joel M Quintana Guerra
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
| | | | - Pedro L Pérez Mora
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
| | - Sadys Feal Carballo
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
| | | | - Maylín Pupo Infante
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
| | | | - Alik Rosabal Poloshkov
- Center of Immunoassay, 134 Street and 25(th) Avenue, 11600, Cubanacán, Playa, Havana, Cuba
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Bioinspired detoxification of blood: The efficient removal of anthrax toxin protective antigen using an extracorporeal macroporous adsorbent device. Sci Rep 2018; 8:7518. [PMID: 29760471 PMCID: PMC5951949 DOI: 10.1038/s41598-018-25678-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 04/26/2018] [Indexed: 12/28/2022] Open
Abstract
Whilst various remedial human monoclonal antibodies have been developed to treat the potentially life-threatening systemic complications associated with anthrax infection, an optimal and universally effective administration route has yet to be established. In the later stages of infection when antibody administration by injection is more likely to fail one possible route to improve outcome is via the use of an antibody-bound, adsorbent haemoperfusion device. We report here the development of an adsorbent macroporous polymer column containing immobilised B. anthracis exotoxin-specific antibodies, PANG (a non-glycosylated, version of a plant-produced human monoclonal antibody) and Valortim (a fully human monoclonal N-linked glycosylated antibody), for removal of anthrax protective antigen (PA) from freshly frozen human plasma and human whole blood. In addition, we have demonstrated that continuous extracorporeal blood recirculation through a Valortim-bound haemoperfusion column significantly reduced the blood plasma concentration of anthrax PA over 2 hours using an in vivo PA rat infusion model. This work provides proof-of-concept evidence to support the development of such alternative detoxification platforms.
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16
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Faccio G. From Protein Features to Sensing Surfaces. SENSORS (BASEL, SWITZERLAND) 2018; 18:E1204. [PMID: 29662030 PMCID: PMC5948494 DOI: 10.3390/s18041204] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 04/08/2018] [Accepted: 04/12/2018] [Indexed: 12/25/2022]
Abstract
Proteins play a major role in biosensors in which they provide catalytic activity and specificity in molecular recognition. However, the immobilization process is far from straightforward as it often affects the protein functionality. Extensive interaction of the protein with the surface or significant surface crowding can lead to changes in the mobility and conformation of the protein structure. This review will provide insights as to how an analysis of the physico-chemical features of the protein surface before the immobilization process can help to identify the optimal immobilization approach. Such an analysis can help to preserve the functionality of the protein when on a biosensor surface.
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Affiliation(s)
- Greta Faccio
- Independent Scientist, St. Gallen 9000, Switzerland.
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17
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Ng WK, Lim TS, Lai NS. Human neonatal Fc receptor as a new potential antibody binding protein for antibody immobilization. Biotechnol Appl Biochem 2017; 65:547-553. [PMID: 29280199 DOI: 10.1002/bab.1636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 12/15/2017] [Indexed: 11/11/2022]
Abstract
A critical challenge in producing an antibody-based assay with the highest reproducibility and sensitivity is the strategy to immobilize antibodies to solid phase. To date, numerous methods of antibody immobilization were reported but each was subjected to its advantages and limitations. The current study proposes a new potential antibody binding protein, the human neonatal fragment crystallizable (Fc) receptor. This protein has shown its high affinity to the Fc of antibody either in vivo or in vitro. Human neonatal Fc receptor is a heterodimer constructed by p51 α-heavy chain and β2-microglobulin light chain; however, the binding sites toward the antibody are located in the p51 α-heavy chain. Hence, vector cloning and recombinant protein expression were carried out to express the p51 α-heavy chain of the human neonatal Fc receptor (hFcRn-α). The recombinant protein expressed, hFcRn-α, was adopted to pin rabbit IgG against hepatitis B virus surface antigen to a solid phase. A sandwich enzyme-linked immunosorbent assay was further developed to evaluate the efficiency of hFcRn-α-directed immobilization in antigen detection. The result was compared with the conventional physical adsorption method. The findings demonstrated that human neonatal Fc receptor was efficient in pinning antibodies and generating higher signals compared with the physical adsorption of antibody.
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Affiliation(s)
- Woei Kean Ng
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Theam Soon Lim
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
| | - Ngit Shin Lai
- Institute for Research in Molecular Medicine (INFORMM), Universiti Sains Malaysia, Pulau Pinang, Malaysia
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18
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Ta DT, Vanella R, Nash MA. Magnetic Separation of Elastin-like Polypeptide Receptors for Enrichment of Cellular and Molecular Targets. NANO LETTERS 2017; 17:7932-7939. [PMID: 29087202 DOI: 10.1021/acs.nanolett.7b04318] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Protein-conjugated magnetic nanoparticles (mNPs) are promising tools for a variety of biomedical applications, from immunoassays and biosensors to theranostics and drug-delivery. In such applications, conjugation of affinity proteins (e.g., antibodies) to the nanoparticle surface many times compromises biological activity and specificity, leading to increased reagent consumption and decreased assay performance. To address this problem, we engineered a biomolecular magnetic separation system that eliminates the need to chemically modify nanoparticles with the capture biomolecules or synthetic polymers of any kind. The system consists of (i) thermoresponsive magnetic iron oxide nanoparticles displaying poly(N-isopropylacrylamide) (pNIPAm), and (ii) an elastin-like polypeptide (ELP) fused with the affinity protein Cohesin (Coh). Proper design of pNIPAm-mNPs and ELP-Coh allowed for efficient cross-aggregation of the two distinct nanoparticle types under collapsing stimuli, which enabled magnetic separation of ELP-Coh aggregates bound to target Dockerin (Doc) molecules. Selective resolubilization of the ELP-Coh/Doc complexes was achieved under intermediate conditions under which only the pNIPAm-mNPs remained aggregated. We show that ELP-Coh is capable of magnetically separating and purifying nanomolar quantities of Doc as well as eukaryotic whole cells displaying the complementary Doc domain from diluted human plasma. This modular system provides magnetic enrichment and purification of captured molecular targets and eliminates the requirement of biofunctionalization of magnetic nanoparticles to achieve bioseparations. Our streamlined and simplified approach is amenable for point-of-use applications and brings the advantages of ELP-fusion proteins to the realm of magnetic particle separation systems.
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Affiliation(s)
- Duy Tien Ta
- Department of Chemistry, University of Basel , 4058 Basel, Switzerland
- Department of Biosystems Science and Engineering, Swiss Federal Institute of Technology (ETH Zurich) , 4058 Basel, Switzerland
| | - Rosario Vanella
- Department of Chemistry, University of Basel , 4058 Basel, Switzerland
- Department of Biosystems Science and Engineering, Swiss Federal Institute of Technology (ETH Zurich) , 4058 Basel, Switzerland
| | - Michael A Nash
- Department of Chemistry, University of Basel , 4058 Basel, Switzerland
- Department of Biosystems Science and Engineering, Swiss Federal Institute of Technology (ETH Zurich) , 4058 Basel, Switzerland
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Melo AMA, Alexandre DL, Oliveira MRF, Furtado RF, Borges MF, Ribeiro PRV, Biswas A, Cheng HN, Alves CR, Figueiredo EAT. Optimization and characterization of a biosensor assembly for detection of Salmonella Typhimurium. J Solid State Electrochem 2017. [DOI: 10.1007/s10008-017-3767-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Jeong S, Park JY, Cha MG, Chang H, Kim YI, Kim HM, Jun BH, Lee DS, Lee YS, Jeong JM, Lee YS, Jeong DH. Highly robust and optimized conjugation of antibodies to nanoparticles using quantitatively validated protocols. NANOSCALE 2017; 9:2548-2555. [PMID: 28150822 DOI: 10.1039/c6nr04683e] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Antibody-conjugated nanoparticles (NPs) have attracted great attention in diagnostic and therapeutic applications due to their high sensitivity and specificity for biotargets, as well as their wide applicability. Unfortunately, these features are significantly affected by antibody conjugation methods in terms of conjugation efficiency, orientation of the target binding site in the antibody, and denaturation during chemical conjugation reactions. Furthermore, the number of conjugated antibodies on each NP and the overall targeting efficacy are critical factors for a quantitative bioassay with antibody-conjugated NPs. Herein, we report a versatile and oriented antibody conjugation method using copper-free click chemistry. Moreover, the number of conjugated antibodies and their binding capacity were quantitatively and experimentally evaluated using fluorescently-labeled antibodies and antigens. The strong binding capability of antibody-conjugated NPs prepared using the copper-free click chemistry-based conjugation strategy was 8 times superior to the binding capability seen following the use of the EDC/NHS-coupling method. Additionally, the versatility of the developed antibody conjugation method was also demonstrated by conjugation of the antibody to three kinds of silica-encapsulated NPs.
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Affiliation(s)
- Sinyoung Jeong
- Department of Chemistry Education, Seoul National University, Seoul 08826, Korea.
| | - Ji Yong Park
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea. and Major in Biomedical Sciences, Department of Biomedical Sciences, Seoul National University Graduate School, Seoul 08826, Korea
| | - Myeong Geun Cha
- Department of Chemistry Education, Seoul National University, Seoul 08826, Korea.
| | - Hyejin Chang
- Department of Chemistry Education, Seoul National University, Seoul 08826, Korea.
| | - Yong-Il Kim
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea.
| | - Hyung-Mo Kim
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Bong-Hyun Jun
- Department of Bioscience and Biotechnology, Konkuk University, Seoul 05029, Korea
| | - Dong Soo Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea. and Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Yoon-Sik Lee
- School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Korea
| | - Jae Min Jeong
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea.
| | - Yun-Sang Lee
- Department of Nuclear Medicine, Seoul National University College of Medicine, Seoul 03080, Korea. and Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, and College of Medicine or College of Pharmacy, Seoul National University, Seoul 08826, Korea
| | - Dae Hong Jeong
- Department of Chemistry Education, Seoul National University, Seoul 08826, Korea.
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Wang X, Xu L, Mao R, Zhao X, Xu B, Tang C, He J, Zhang Y. An insertion/self-fusion mechanism for cell membrane immobilization on porous silica beads to fabricate biomimic carriers. Biomater Sci 2017. [DOI: 10.1039/c7bm00419b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An insertion/self-fusion mechanism for cell membrane immobilization on porous silica beads has been proposed to fabricate biomimic carriers.
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Affiliation(s)
- Xu Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Liang Xu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Ruizhi Mao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Xinchao Zhao
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Bei Xu
- School of Public Health
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Cheng Tang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Jiahui He
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics)
- School of Pharmacy
- Tianjin Medical University
- Tianjin 300070
- P. R. China
| | - Yanwen Zhang
- Tianjin Medical College
- Tianjin 300222
- P. R. China
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Li X, Liu X. A Microfluidic Paper-Based Origami Nanobiosensor for Label-Free, Ultrasensitive Immunoassays. Adv Healthc Mater 2016; 5:1326-35. [PMID: 27122227 DOI: 10.1002/adhm.201501038] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/20/2016] [Indexed: 11/09/2022]
Abstract
Microfluidic paper-based analytical devices (μPADs) represent a promising platform technology for point-of-care diagnosis. Highly sensitive, rapid, and easy-to-perform immunoassays implemented on μPADs are desirable to fulfill the promise of the μPAD technology. This article reports the first microfluidic paper-based origami nanobiosensor (origami μPAD), which integrates zinc oxide nanowires (ZnO NWs) and electrochemical impedance spectroscopy (EIS) biosensing mechanism, for label-free, ultrasensitive immunoassays. The EIS mechanism features simple and label-free assay operations which take less than 25 min to be finished, while the ZnO NWs allow covalent bonding for immobilizing probe proteins and improve the biosensing performance with such features as high surface-area-to-volume ratios and high sensitivity to surface binding. The calibration of the device reveals an ultralow limit of detection (LOD) of 60 fg mL(-1) (>100 times lower than those of existing μPADs) for rabbit immunoglobulin G in phosphate-buffered saline. The detection of human immunodeficiency virus p24 antigen in human serum with a low LOD of 300 fg mL(-1) (>33 times lower than that of a commercial p24 antigen test kit) is also demonstrated. This novel μPAD design offers ultrahigh sensitivity, short assay time, and ease of operation, and thus possesses significant potential for low-cost, rapid molecular diagnosis of early-stage diseases.
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Affiliation(s)
- Xiao Li
- Department of Mechanical Engineering; McGill University; 817 Sherbrooke Street West Montreal Quebec H3A 0C3 Canada
| | - Xinyu Liu
- Department of Mechanical Engineering; McGill University; 817 Sherbrooke Street West Montreal Quebec H3A 0C3 Canada
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23
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Min J, Song EK, Kim H, Kim KT, Park TJ, Kang S. A Recombinant Secondary Antibody Mimic as a Target-specific Signal Amplifier and an Antibody Immobilizer in Immunoassays. Sci Rep 2016; 6:24159. [PMID: 27063487 PMCID: PMC4827060 DOI: 10.1038/srep24159] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 03/21/2016] [Indexed: 11/09/2022] Open
Abstract
We construct a novel recombinant secondary antibody mimic, GST-ABD, which can bind to the Fc regions of target-bound primary antibodies and acquire multiple HRPs simultaneously. We produce it in tenth of mg quantities with a bacterial overexpression system and simple purification procedures, significantly reducing the manufacturing cost and time without the use of animals. GST-ABD is effectively conjugated with 3 HRPs per molecule on an average and selectively bind to the Fc region of primary antibodies derived from three different species (mouse, rabbit, and rat). HRP-conjugated GST-ABD (HRP-GST-ABD) is successfully used as an alternative to secondary antibodies to amplify target-specific signals in both ELISA and immunohistochemistry regardless of the target molecules and origin of primary antibodies used. GST-ABD also successfully serves as an anchoring adaptor on the surface of GSH-coated plates for immobilizing antigen-capturing antibodies in an orientation-controlled manner for sandwich-type indirect ELISA through simple molecular recognition without any complicated chemical modification.
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Affiliation(s)
- Junseon Min
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea
| | - Eun Kyung Song
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea
| | - Hansol Kim
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea
| | - Kyoung Taek Kim
- Department of Chemistry, Seoul National University, Seoul, 151-747, Korea
| | - Tae Joo Park
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea
| | - Sebyung Kang
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 689-798, Korea
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24
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Kim H, Kang YJ, Min J, Choi H, Kang S. Development of an antibody-binding modular nanoplatform for antibody-guided targeted cell imaging and delivery. RSC Adv 2016. [DOI: 10.1039/c6ra00233a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A polyvalent antibody-binding lumazine synthase protein cage nanoparticle (ABD–AaLS) is constructed by genetically fusing lumazine synthase and antibody-binding domains. ABD–AaLS effectively displays targeting antibodies in an orientation-controlled manner.
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Affiliation(s)
- Hansol Kim
- Department of Biological Sciences
- School of Life Sciences
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Korea
| | - Young Ji Kang
- Department of Biological Sciences
- School of Life Sciences
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Korea
| | - Junseon Min
- Department of Biological Sciences
- School of Life Sciences
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Korea
| | - Hyeokjune Choi
- Department of Biological Sciences
- School of Life Sciences
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Korea
| | - Sebyung Kang
- Department of Biological Sciences
- School of Life Sciences
- Ulsan National Institute of Science and Technology (UNIST)
- Ulsan
- Korea
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25
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Uhde‐Holzem K, McBurney M, Tiu BDB, Advincula RC, Fischer R, Commandeur U, Steinmetz NF. Production of Immunoabsorbent Nanoparticles by Displaying Single‐Domain Protein A on Potato Virus X. Macromol Biosci 2015; 16:231-41. [DOI: 10.1002/mabi.201500280] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2015] [Revised: 08/30/2015] [Indexed: 01/25/2023]
Affiliation(s)
- Kerstin Uhde‐Holzem
- Institute for Molecular BiotechnologyRWTH Aachen University, Worringer Weg 152074 AachenGermany
| | - Michael McBurney
- Department of Biomedical EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
| | - Brylee David B. Tiu
- Department of Macromolecular Science and EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
| | - Rigoberto C. Advincula
- Department of Macromolecular Science and EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
| | - Rainer Fischer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IMEForckenbeckstraße 652074AachenGermany
| | - Ulrich Commandeur
- Institute for Molecular BiotechnologyRWTH Aachen University, Worringer Weg 152074 AachenGermany
| | - Nicole F. Steinmetz
- Department of Biomedical EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
- Department of Macromolecular Science and EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
- Department of RadiologyCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
- Department of Materials Science and EngineeringCase Western Reserve University Schools of Medicine and EngineeringClevelandOhio 44106USA
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26
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A highly sensitive SPR biosensor based on a graphene oxide sheet modified with gold bipyramids, and its application to an immunoassay for rabbit IgG. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1497-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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27
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Ingavle GC, Baillie LWJ, Zheng Y, Lis EK, Savina IN, Howell CA, Mikhalovsky SV, Sandeman SR. Affinity binding of antibodies to supermacroporous cryogel adsorbents with immobilized protein A for removal of anthrax toxin protective antigen. Biomaterials 2015; 50:140-53. [PMID: 25736504 DOI: 10.1016/j.biomaterials.2015.01.039] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 12/21/2014] [Accepted: 01/20/2015] [Indexed: 01/17/2023]
Abstract
Polymeric cryogels are efficient carriers for the immobilization of biomolecules because of their unique macroporous structure, permeability, mechanical stability and different surface chemical functionalities. The aim of the study was to demonstrate the potential use of macroporous monolithic cryogels for biotoxin removal using anthrax toxin protective antigen (PA), the central cell-binding component of the anthrax exotoxins, and covalent immobilization of monoclonal antibodies. The affinity ligand (protein A) was chemically coupled to the reactive hydroxyl and epoxy-derivatized monolithic cryogels and the binding efficiencies of protein A, monoclonal antibodies to the cryogel column were determined. Our results show differences in the binding capacity of protein A as well as monoclonal antibodies to the cryogel adsorbents caused by ligand concentrations, physical properties and morphology of surface matrices. The cytotoxicity potential of the cryogels was determined by an in vitro viability assay using V79 lung fibroblast as a model cell and the results reveal that the cryogels are non-cytotoxic. Finally, the adsorptive capacities of PA from phosphate buffered saline (PBS) were evaluated towards a non-glycosylated, plant-derived human monoclonal antibody (PANG) and a glycosylated human monoclonal antibody (Valortim(®)), both of which were covalently attached via protein A immobilization. Optimal binding capacities of 108 and 117 mg/g of antibody to the adsorbent were observed for PANG attached poly(acrylamide-allyl glycidyl ether) [poly(AAm-AGE)] and Valortim(®) attached poly(AAm-AGE) cryogels, respectively, This indicated that glycosylation status of Valortim(®) antibody could significantly increase (8%) its binding capacity relative to the PANG antibody on poly(AAm-AGE)-protien-A column (p < 0.05). The amounts of PA which remained in the solution after passing PA spiked PBS through PANG or Valortim bound poly(AAm-AGE) cryogel were significantly (p < 0.05) decreased relative to the amount of PA remained in the solution after passing through unmodified as well as protein A modified poly(AAm-AGE) cryogel columns, indicates efficient PA removal from spiked PBS over 60 min of circulation. The high adsorption capacity towards anthrax toxin PA of the cryogel adsorbents indicated potential application of these materials for treatment of Bacillus anthracis infection.
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Affiliation(s)
- Ganesh C Ingavle
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK.
| | - Les W J Baillie
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, UK.
| | - Yishan Zheng
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK.
| | - Elzbieta K Lis
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Redwood Building, King Edward VII Avenue, Cardiff CF10 3NB, UK.
| | - Irina N Savina
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK.
| | - Carol A Howell
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK.
| | - Sergey V Mikhalovsky
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK; School of Engineering, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana 010000, Kazakhstan.
| | - Susan R Sandeman
- Biomaterials and Medical Devices Research Group, School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton, Brighton, East Sussex BN2 4GJ, UK.
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28
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Wang C, Feng B. Research progress on site-oriented and three-dimensional immobilization of protein. Mol Biol 2015. [DOI: 10.1134/s0026893315010173] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Reimhult E, Höök F. Design of surface modifications for nanoscale sensor applications. SENSORS (BASEL, SWITZERLAND) 2015; 15:1635-75. [PMID: 25594599 PMCID: PMC4327096 DOI: 10.3390/s150101635] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2014] [Accepted: 01/07/2015] [Indexed: 02/07/2023]
Abstract
Nanoscale biosensors provide the possibility to miniaturize optic, acoustic and electric sensors to the dimensions of biomolecules. This enables approaching single-molecule detection and new sensing modalities that probe molecular conformation. Nanoscale sensors are predominantly surface-based and label-free to exploit inherent advantages of physical phenomena allowing high sensitivity without distortive labeling. There are three main criteria to be optimized in the design of surface-based and label-free biosensors: (i) the biomolecules of interest must bind with high affinity and selectively to the sensitive area; (ii) the biomolecules must be efficiently transported from the bulk solution to the sensor; and (iii) the transducer concept must be sufficiently sensitive to detect low coverage of captured biomolecules within reasonable time scales. The majority of literature on nanoscale biosensors deals with the third criterion while implicitly assuming that solutions developed for macroscale biosensors to the first two, equally important, criteria are applicable also to nanoscale sensors. We focus on providing an introduction to and perspectives on the advanced concepts for surface functionalization of biosensors with nanosized sensor elements that have been developed over the past decades (criterion (iii)). We review in detail how patterning of molecular films designed to control interactions of biomolecules with nanoscale biosensor surfaces creates new possibilities as well as new challenges.
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Affiliation(s)
- Erik Reimhult
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology, University of Natural Resources and Life Sciences, Vienna, Muthgasse 11, A-1190 Vienna, Austria.
| | - Fredrik Höök
- Biological Physics, Department of Applied Physics, Chalmers University of Technology, Fysikgränd 3, SE-411 33 Göteborg, Sweden.
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30
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Marciello M, Filice M, Olea D, Velez M, Guisan JM, Mateo C. Useful oriented immobilization of antibodies on chimeric magnetic particles: direct correlation of biomacromolecule orientation with biological activity by AFM studies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:15022-15030. [PMID: 25420004 DOI: 10.1021/la502972v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The preparation and performance of a suitable chimeric biosensor based on antibodies (Abs) immobilized on lipase-coated magnetic particles by means of a standing orienting strategy are presented. This novel system is based on hydrophobic magnetic particles coated with modified lipase molecules able to orient and further immobilize different Abs in a covalent way without any previous site-selective chemical modification of biomacromolecules. Different key parameters attending the process were studied and optimized. The optimal preparation was performed using a controlled loading (1 nmol Ab g(-1) chimeric support) at pH 9 and a short reaction time to recover a biological activity of about 80%. AFM microscopy was used to study and confirm the Abs-oriented immobilization on lipase-coated magnetic particles and the final achievement of a highly active and recyclable chimeric immune sensor. This direct technique was demonstrated to be a powerful alternative to the indirect immunoactivity assay methods for the study of biomacromolecule-oriented immobilizations.
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Affiliation(s)
- Marzia Marciello
- Departamento de Biomateriales y Materiales Bioinspirados, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Campus UAM Cantoblanco , 28049 Madrid, Spain
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31
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Peng L, Damschroder MM, Wu H, Dall’Acqua WF. Bi-epitope SPR surfaces: a solution to develop robust immunoassays. PLoS One 2014; 9:e112070. [PMID: 25372291 PMCID: PMC4221230 DOI: 10.1371/journal.pone.0112070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 10/10/2014] [Indexed: 11/18/2022] Open
Abstract
Surface plasmon resonance (SPR)-based immunoassays have numerous applications and require high affinity reagents for sensitive and reliable measurements. We describe a quick approach to turn low affinity antibodies into appropriate capture reagents. We used antibodies recognizing human ephrin type A receptor 2 (EphA2) and a ProteOn XPR36 as a model system. We generated so-called 'bi-epitope' sensor surfaces by immobilizing various pairs of anti-EphA2 antibodies using standard amine coupling. The apparent binding affinities to EphA2 and EphA2 detection sensitivities of the bi-epitope and 'single-epitope' surfaces were then compared. For all antibody pairs tested, bi-epitope surfaces exhibited an ∼ 10-100-fold improvement in apparent binding affinities when compared with single-epitope ones. When pairing 2 antibodies of low intrinsic binding affinities (∼ 10(-8) M) and fast dissociation rates (∼ 10(-2) s(-1)), the apparent binding affinity and dissociation rate of the bi-epitope surface was improved up to ∼ 10(-10) M and 10(-4) s(-1), respectively. This led to an ∼ 100-200-fold enhancement in EphA2 limit of detection in crude cell supernatants. Our results show that the use of antibody mixtures in SPR applications constitutes a powerful approach to develop sensitive immunoassays, as previously shown for non-SPR formats. As SPR-based assays have significantly expanded their reach in the last decade, such an approach promises to further accelerate their development.
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Affiliation(s)
- Li Peng
- Department of Antibody Discovery and Protein Engineering, MedImmune, One MedImmune Way, Gaithersburg, MD, 20878, United States of America
| | - Melissa M. Damschroder
- Department of Antibody Discovery and Protein Engineering, MedImmune, One MedImmune Way, Gaithersburg, MD, 20878, United States of America
| | - Herren Wu
- Department of Antibody Discovery and Protein Engineering, MedImmune, One MedImmune Way, Gaithersburg, MD, 20878, United States of America
| | - William F. Dall’Acqua
- Department of Antibody Discovery and Protein Engineering, MedImmune, One MedImmune Way, Gaithersburg, MD, 20878, United States of America
- * E-mail:
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32
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Yu Q, Wang Q, Li B, Lin Q, Duan Y. Technological Development of Antibody Immobilization for Optical Immunoassays: Progress and Prospects. Crit Rev Anal Chem 2014. [DOI: 10.1080/10408347.2014.881249] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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33
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Phenylboronic acid polymer brush-enabled oriented and high density antibody immobilization for sensitive microarray immunoassay. Colloids Surf B Biointerfaces 2014; 121:21-6. [DOI: 10.1016/j.colsurfb.2014.05.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 05/18/2014] [Accepted: 05/20/2014] [Indexed: 12/30/2022]
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34
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Ertürk G, Mattiasson B. Cryogels-versatile tools in bioseparation. J Chromatogr A 2014; 1357:24-35. [DOI: 10.1016/j.chroma.2014.05.055] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/20/2014] [Accepted: 05/20/2014] [Indexed: 11/26/2022]
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Seo JS, Poulter CD. Sandwich antibody arrays using recombinant antibody-binding protein L. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6629-6635. [PMID: 24841983 PMCID: PMC4059220 DOI: 10.1021/la500822w] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 05/16/2014] [Indexed: 06/01/2023]
Abstract
Antibody arrays are a useful for detecting antigens and other antibodies. This technique typically requires a uniform and well-defined orientation of antibodies attached to a surface for optimal performance. A uniform orientation can be achieved by modification of antibodies to include a single site for attachment. Thus, uniformly oriented antibody arrays require a bioengineered modification for the antibodies directly immobilization on the solid surface. In this study, we describe a "sandwich-type" antibody array where unmodified antibodies are oriented through binding with regioselectively immobilized recombinant antibody-binding protein L. Recombinant proL-CVIA bearing C-terminal CVIA motif is post-translationally modified with an alkyne group by protein farnesyltransferase (PFTase) at the cysteine residue in the CVIA sequence to give proL-CVIApf, which is covalently attached to an azido-modified glass slide by a Huisgen [3 + 2] cycloaddition reaction. Slides bearing antibodies bound to slides coated with regioselectively immobilized proL-CVIApf gave stronger fluorescence outputs and those where the antibody-binding protein was immobilized in random orientations on an epoxy-modified slide. Properly selected capture and detection antibodies did not cross-react with immobilized proL-CVIApf in sandwich arrays, and the proL-CVIApf slides can be used for multiple cycles of detected over a period of several months.
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36
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Wang W, Jing Y, He S, Wang JP, Zhai JP. Surface modification and bioconjugation of FeCo magnetic nanoparticles with proteins. Colloids Surf B Biointerfaces 2013; 117:449-56. [PMID: 24373979 DOI: 10.1016/j.colsurfb.2013.11.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 11/27/2013] [Accepted: 11/29/2013] [Indexed: 02/01/2023]
Abstract
Magnetic Fe70Co30 nanoparticles with a cubic shape and a mean size of 15±1.5 nm were fabricated using a magnetron-sputtering-based gas phase condensation deposition method. The particles had a high saturation magnetization of 220 emu/g, which is much higher than that of commercially available iron oxide nanoparticles. The FeCo nanoparticles were modified by 3-aminopropyltriethoxy silane and subsequently activated by glutaraldehyde, leading to successful attachment of aldehyde groups onto nanoparticle surfaces. Three proteins, namely streptavidin, PAPP-A antibody and Nectin-4 antibody, were immobilized on glutaraldehyde activated FeCo nanoparticles, and their loading levels were quantitatively evaluated. Our results show that loading capabilities are 95 μg of streptavidin, 128 μg of PAPP-A, and 125 μg of Nectin-4 antibody per milligram of FeCo nanoparticles, and that the three immobilized proteins retain their binding bioactivity. The protein-FeCo conjugates may find valuable applications involving magnetic separation and purification of proteins and cells, and the magnetic detection of biomolecules.
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Affiliation(s)
- Wei Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA; State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China
| | - Ying Jing
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Shihai He
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Jian-Ping Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Jian-Ping Zhai
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China.
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Liao WC, Annie Ho JA. Improved activity of immobilized antibody by paratope orientation controller: probing paratope orientation by electrochemical strategy and surface plasmon resonance spectroscopy. Biosens Bioelectron 2013; 55:32-8. [PMID: 24355463 DOI: 10.1016/j.bios.2013.10.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Revised: 10/16/2013] [Accepted: 10/26/2013] [Indexed: 01/22/2023]
Abstract
Electrochemical method and surface plasmon resonance (SPR) spectroscopic analysis are utilized herein to investigate antibody immobilization without and with orientation control for site-positioning paratopes (antigen binding site) of the antibody molecules. Biotin and its antibody were selected in current study as model. Such an approach employed thiophene-3-boronic acid (T3BA) as paratope orientation controller, (i) enabled site orientation of the antibody molecules reducing the hiding of paratopes, and (ii) maintained the activity of the captured antibodies, as confirmed by electrochemical and SPR analysis. Anti-biotin antibody (a glycoprotein) was covalently bound to a self-assembled monolayer of T3BA modified on a nanogold-electrodeposited screen-printed electrode through boronic acid-saccharide interactions, with the boronic acid units specifically binding to the glycosylation sites of the antibody molecules. The immunosensor functioned based on competition between the analyte biotin and biotin-tagged, potassium hexacyanoferrate(II)-encapsulated liposomes. The current signal produced by the released liposomal Fe(CN)6(4-), measured using square wave voltammetry, yielded a sigmoidally shaped dose-response curve that was linear over eight orders of magnitude (from 10(-11) to 10(-3)M). Furthermore this biosensing system fabricated based on T3BA approach was found to possess significantly improved sensitivity, and the limit of detection toward biotin was calculated as 0.102 ng mL(-1) (equivalent to 6 μL of 4.19 × 10(-10)M biotin).
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Affiliation(s)
- Wei-Ching Liao
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Department of Chemistry, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Ja-An Annie Ho
- BioAnalytical Chemistry and Nanobiomedicine Laboratory, Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan; Department of Chemistry, National Tsing Hua University, No. 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan.
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Yao C, Hedrick M, Pareek G, Renzulli J, Haleblian G, Webster TJ. Nanostructured polyurethane-poly-lactic-co-glycolic acid scaffolds increase bladder tissue regeneration: an in vivo study. Int J Nanomedicine 2013; 8:3285-96. [PMID: 24039415 PMCID: PMC3770520 DOI: 10.2147/ijn.s44901] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Although showing much promise for numerous tissue engineering applications, polyurethane and poly-lactic-co-glycolic acid (PLGA) have suffered from a lack of cytocompatibility, sometimes leading to poor tissue integration. Nanotechnology (or the use of materials with surface features or constituent dimensions less than 100 nm in at least one direction) has started to transform currently implanted materials (such as polyurethane and PLGA) to promote tissue regeneration. This is because nanostructured surface features can be used to change medical device surface energy to alter initial protein adsorption events important for promoting tissue-forming cell functions. Thus, due to their altered surface energetics, the objective of the present in vivo study was to create nanoscale surface features on a new polyurethane and PLGA composite scaffold (by soaking the polyurethane side and PLGA side in HNO₃ and NaOH, respectively) and determine bladder tissue regeneration using a minipig model. The novel nanostructured scaffolds were further functionalized with IKVAV and YIGSR peptides to improve cellular responses. Results provided the first evidence of increased in vivo bladder tissue regeneration when using a composite of nanostructured polyurethane and PLGA compared with control ileal segments. Due to additional surgery, extended potentially problematic healing times, metabolic complications, donor site morbidity, and sometimes limited availability, ileal segment repair of a bladder defect is not optimal and, thus, a synthetic analog is highly desirable. In summary, this study indicates significant promise for the use of nanostructured polyurethane and PLGA composites to increase bladder tissue repair for a wide range of regenerative medicine applications, such as regenerating bladder tissue after removal of cancerous tissue, disease, or other trauma.
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Affiliation(s)
| | | | - Gyan Pareek
- Section of Minimally Invasive Urology, Alpert Medical School, Brown University, Providence, RI
| | - Joseph Renzulli
- Section of Minimally Invasive Urology, Alpert Medical School, Brown University, Providence, RI
| | - George Haleblian
- Section of Minimally Invasive Urology, Alpert Medical School, Brown University, Providence, RI
| | - Thomas J Webster
- Department of Chemical Engineering and Program in Bioengineering, Northeastern University, Boston, MA, USA
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Seo JS, Lee S, Poulter CD. Regioselective covalent immobilization of recombinant antibody-binding proteins A, G, and L for construction of antibody arrays. J Am Chem Soc 2013; 135:8973-80. [PMID: 23746333 PMCID: PMC3716362 DOI: 10.1021/ja402447g] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Immobilized antibodies are useful for the detection of antigens in highly sensitive microarray diagnostic applications. Arrays with the antibodies attached regioselectively in a uniform orientation are typically more sensitive than those with random orientations. Direct regioselective immobilization of antibodies on a solid support typically requires a modified form of the protein. We now report a general approach for the regioselective attachment of antibodies to a surface using truncated forms of antibody-binding proteins A, G, and L that retain the structural motifs required for antibody binding. The recombinant proteins have a C-terminal CVIX protein farnesyltransferase recognition motif that allows us to append a bioorthogonal azide or alkyne moiety and use the Cu(I)-catalyzed Huisgen cycloaddition to attach the binding proteins to a suitably modified glass surface. This approach offers several advantages. The recombinant antibody-binding proteins are produced in Escherichia coli, chemoselectively modified posttranslationally in the cell-free homogenate, and directly attached to the glass surface without the need for purification at any stage of the process. Complexes between immobilized recombinant proteins A, G, and L and their respective strongly bound antibodies were stable to repeated washing with PBST buffer at pH 7.2. However, the antibodies could be stripped from the slides by treatment with 0.1 M glycine·HCl buffer, pH 2.6, for 30 min and regenerated by shaking with PBS buffer, pH 7.2, at 4 °C overnight. The recombinant forms of proteins A, G, and L can be used separately or in combination to give glass surfaces capable of binding a wide variety of antibodies.
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Affiliation(s)
- Jin-soo Seo
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112
| | | | - C. Dale Poulter
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112
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40
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Characterization of the optimized C2 domain of protein G: finding its additional chicken IgY-binding ability. Biotechnol Lett 2013; 35:1441-7. [DOI: 10.1007/s10529-013-1221-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 04/24/2013] [Indexed: 11/26/2022]
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41
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Hu X, Hortigüela MJ, Robin S, Lin H, Li Y, Moran AP, Wang W, Wall JG. Covalent and oriented immobilization of scFv antibody fragments via an engineered glycan moiety. Biomacromolecules 2012; 14:153-9. [PMID: 23215344 DOI: 10.1021/bm301518p] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Antibody-derived fragments have enormous potential application in solid-phase assays such as biomarker detection and protein purification. Controlled orientation of the immobilized antibody molecules is a critical requirement for the sensitivity and efficacy of such assays. We present an approach for covalent, correctly oriented attachment of scFv antibody fragments on solid supports. Glycosylated scFvs were expressed in Escherichia coli and the C-terminal, binding pocket-distal glycan tag was oxidized for covalent attachment to amine-functionalized beads. The glycosylated scFvs could be immobilized at salt concentrations that precluded nonspecific adsorption of unglycosylated molecules and the covalently attached antibody fragments exhibited 4-fold higher functional activity than ionically adsorbed scFvs. The glyco-tethered scFvs were stable in NaCl concentrations that removed greater than 90% of adsorbed scFvs and they exhibited improved stability of antigen binding over both adsorbed scFvs and soluble, nonimmobilized scFvs in accelerated degradation tests. The simple expression and immobilization approach reported is likely to find broad application in in vitro antibody tests.
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Affiliation(s)
- Xuejun Hu
- Medical College, Dalian University, Xuefu Avenue No.10, Dalian Economical and Technological Development Zone, Liaoning 116622, China.
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Batalla P, Bolívar JM, Lopez-Gallego F, Guisan JM. Oriented covalent immobilization of antibodies onto heterofunctional agarose supports: A highly efficient immuno-affinity chromatography platform. J Chromatogr A 2012; 1262:56-63. [DOI: 10.1016/j.chroma.2012.08.058] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 08/14/2012] [Accepted: 08/19/2012] [Indexed: 11/30/2022]
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43
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Jung J, Yi SY, Jang HH, Lee CS, Chung BH. Facile and oriented antibody immobilization on α-cyclodextrin-modified sensors surfaces. Macromol Res 2012. [DOI: 10.1007/s13233-013-1030-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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44
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Developing an antibody-binding protein cage as a molecular recognition drug modular nanoplatform. Biomaterials 2012; 33:5423-30. [DOI: 10.1016/j.biomaterials.2012.03.055] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 03/15/2012] [Indexed: 11/21/2022]
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Shimazaki Y, Kohno Y, Fukui I, Koyashiki T. Epitope analysis using membrane-immobilized avidin and protein A. Protein Expr Purif 2012; 83:177-81. [DOI: 10.1016/j.pep.2012.03.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2012] [Revised: 03/27/2012] [Accepted: 03/29/2012] [Indexed: 10/28/2022]
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Wang DS, Chang CC, Shih SC, Lin CW. AN ELLIPSOMETRIC STUDY ON THE DENSITY AND FUNCTIONALITY OF ANTIBODY LAYERS IMMOBILIZED BY A RANDOMLY COVALENT METHOD AND A PROTEIN A-ORIENTED METHOD. BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS 2012. [DOI: 10.4015/s1016237209001386] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Ellipsometry is used to quantitatively evaluate the antigen-sensing capability of immuno-surfaces. The ellipsometric measurement is a rapid, label-free, and in situ detection; however, quantification of analytes by ellipsometry is not unambiguous. The proper use of the effective thickness as a measure for the amount of analytes is addressed in this article. Taking the effective thickness as the quantification reference, we find that employing protein A to immobilize antibodies makes the antigen capture two to three times higher than the covalent immobilization technique using N-succinimidyl 4-maleimidobutyrate (GMBS). Besides, the results also suggest a uniform orientation of antibodies achieved by protein A. Increasing the density of surface antibodies would improve the sensitivity as well; however, the effect is more crucial for the protein A immuno-surface and appears to be less important for the GMBS immuno-surface. Therefore, the optimal immobilization strategy should include an orientation layer, such as protein A, and maximize the amount of oriented antibodies on the surface to further improve the efficiency for antigen detection.
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Affiliation(s)
- Da-Shin Wang
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
- Center of Nanoscience and Technology, National Taiwan University, Taipei, Taiwan
| | - Chia-Chen Chang
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
| | - Shiue-Ching Shih
- Center for Measurement Standards, Industrial Technology Research Institute, Hsinchu, Taiwan
| | - Chii-Wann Lin
- Institute of Biomedical Engineering, National Taiwan University, Taipei, Taiwan
- Center of Nanoscience and Technology, National Taiwan University, Taipei, Taiwan
- Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
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Optimization of DNA-directed immobilization on mixed oligo(ethylene glycol) monolayers for immunodetection. Anal Biochem 2012; 423:26-35. [DOI: 10.1016/j.ab.2011.12.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 12/29/2011] [Accepted: 12/29/2011] [Indexed: 11/20/2022]
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48
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Oriented immobilization of the tobacco etch virus protease for the cleavage of fusion proteins. J Biotechnol 2012; 158:97-103. [PMID: 22300512 DOI: 10.1016/j.jbiotec.2012.01.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 12/23/2011] [Accepted: 01/13/2012] [Indexed: 10/14/2022]
Abstract
The tobacco etch virus (TEV) protease is a useful tool for the removal of fusion tags from recombinant proteins. The difficulty in obtaining this enzyme led us to look for an optimal method for its use. In this work, we produced both the wild-type and the S219V mutant TEV proteases fused to the Streptag II affinity sequence (Streptag II-TEV(WT), and Streptag II-TEV(S219V), respectively). The two enzymes were affinity immobilized on a streptavidin-agarose matrix and compared to their respective free forms. Both immobilized Streptag II-TEV(WT) and Streptag II-TEV(S219V) were active on the 74-kDa Streptag II substrate with a retained activity of 83.5% and 81%, respectively compared to their free corresponding forms. The slight enzyme activity decrease caused by the immobilization was balanced by the enhanced stability and the successful repetitive use of the proteolytic columns. Thus, the wild-type and the mutant immobilized proteases were used, during a period of 18 months, for nine batch reactions with retention of 38% and 51% of their initial activities, respectively. The present results demonstrate that immobilized TEV protease on streptavidin-agarose is an attractive and efficient tool for fusion protein cleavage, especially when the target protein is fused to a streptagged fusion partner. Using this strategy, the total process can be shortened by performing the cleavage and the recovery of the purified target protein in one step.
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Abstract
Protein chips are becoming a key technology in proteomic research and medical diagnostics. Surface chemistry for immobilization of proteins forms the basis for assay design and determines the properties of protein microarrays. Optimal substrates provide a homogeneous environment for probes, preventing loss of biological activity and unspecific adsorption. Numerous immobilization approaches, based on covalent binding, affinity, or adsorption, have been proposed thus far, and these represent the toolbox for choosing optimized strategies for each individual application.
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Specific peptides as alternative to antibody ligands for biomagnetic separation of Clostridium tyrobutyricum spores. Anal Bioanal Chem 2011; 402:3219-26. [PMID: 22160206 DOI: 10.1007/s00216-011-5621-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 11/15/2011] [Accepted: 11/28/2011] [Indexed: 10/14/2022]
Abstract
Nowadays, the reference method for the detection of Clostridium tyrobutyricum in milk is the most-probable-number method, a very time-consuming and non-specific method. In this work, the suitability of the use of superparamagnetic beads coated with specific antibodies and peptides for bioseparation and concentration of spores of C. tyrobutyricum has been assessed. Peptide or antibody functionalized nanoparticles were able to specifically bind C. tyrobutyricum spores and concentrate them up to detectable levels. Moreover, several factors, such as particle size (200 nm and 1 μm), particle derivatization (aminated and carboxylated beads), coating method, and type of ligand have been studied in order to establish the most appropriate conditions for spore separation. Results show that concentration of spore is favored by a smaller bead size due to the wider surface of interaction in relation to particle volume. Antibody orientation, related to the binding method, is also critical in spore recovery. However, specific peptides seem to be a better ligand than antibodies, not only due to the higher recovery ratio of spores obtained but also due to the prolonged stability over time, allowing an optimal recovery of spores up to 3 weeks after bead coating. These results demonstrate that specific peptides bound to magnetic nanoparticles can be used instead of traditional antibodies to specifically bind C. tyrobutyricum spores being a potential basis for a rapid method to detect this bacterial target.
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