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Chu X, Yang X, Shi Q, Dong X, Sun Y. Kinetic and molecular insight into immunoglobulin G binding to immobilized recombinant protein A of different orientations. J Chromatogr A 2022; 1671:463040. [DOI: 10.1016/j.chroma.2022.463040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/27/2022] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
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2
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Development of an enhanced immunoassay based on protein nanoparticles displaying an IgG-binding domain and luciferase. Anal Bioanal Chem 2022; 414:2079-2088. [PMID: 35037082 DOI: 10.1007/s00216-021-03842-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 12/02/2021] [Accepted: 12/08/2021] [Indexed: 11/01/2022]
Abstract
Detection of small amounts of target molecules with high sensitivity is important for the diagnosis of many diseases, including cancers, and is particularly important to detect early stages of disease. Here, we report the development of a temperature-responsive fusion protein (ELP-DCN) comprised of an elastin-like polypeptide (ELP), poly-aspartic acid (D), antibody-binding domain C (C), and NanoLuc luciferase (N). ELP-DCN proteins form nanoparticles above a certain threshold temperature that display an antibody-binding domain and NanoLuc luciferase on their surface. ELP-DCN nanoparticles can be applied for enhancement of immunoassay systems because they provide more antibody-binding sites and an increased number of luciferase molecules, resulting in an increase in assay signal. Here, we report the detection of human serum albumin (HSA) as a model protein using anti-HSA and ELP-DCN proteins. Upon formation of ELP-DCN nanoparticles, the detection limit improved tenfold compared to the monomeric form of ELP-DCN.
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3
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Gao S, Guisán JM, Rocha-Martin J. Oriented immobilization of antibodies onto sensing platforms - A critical review. Anal Chim Acta 2022; 1189:338907. [PMID: 34815045 DOI: 10.1016/j.aca.2021.338907] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/08/2021] [Accepted: 07/31/2021] [Indexed: 12/26/2022]
Abstract
The immunosensor has been proven a versatile tool to detect various analytes, such as food contaminants, pathogenic bacteria, antibiotics and biomarkers related to cancer. To fabricate robust and reproducible immunosensors with high sensitivity, the covalent immobilization of immunoglobulins (IgGs) in a site-specific manner contributes to better performance. Instead of the random IgG orientations result from the direct yet non-selective immobilization techniques, this review for the first time introduces the advances of stepwise yet site-selective conjugation strategies to give better biosensing efficiency. Noncovalently adsorbing IgGs is the first but decisive step to interact specifically with the Fc fragment, then following covalent conjugate can fix this uniform and antigens-favorable orientation irreversibly. In this review, we first categorized this stepwise strategy into two parts based on the different noncovalent interactions, namely adhesive layer-mediated interaction onto homofunctional support and layer-free interaction onto heterofunctional support (which displays several different functionalities on its surface that are capable to interact with IgGs). Further, the influence of ligands characteristics (synthesis strategies, spacer requirements and matrices selection) on the heterofunctional support has also been discussed. Finally, conclusions and future perspectives for the real-world application of stepwise covalent conjugation are discussed. This review provides more insights into the fabrication of high-efficiency immunosensor, and special attention has been devoted to the well-orientation of full-length IgGs onto the sensing platform.
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Affiliation(s)
- Shipeng Gao
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - José M Guisán
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
| | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
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4
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Tang JB, Yang HM, Gao XY, Zeng XZ, Wang FS. Directional immobilization of antibody onto magnetic nanoparticles by Fc-binding protein-assisted photo-conjugation for high sensitivity detection of antigen. Anal Chim Acta 2021; 1184:339054. [PMID: 34625272 DOI: 10.1016/j.aca.2021.339054] [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: 07/09/2021] [Revised: 09/02/2021] [Accepted: 09/09/2021] [Indexed: 11/24/2022]
Abstract
Immobilized antibodies with site-specific, oriented, and covalent pattern are of great significance to improve the sensitivity of solid-phase immunoassay. Here, we developed a novel antibody conjugation strategy that can immobilize antibodies in a directional and covalent manner. In this study, an IgG-Fc binding protein (Z domain) carrying a site-specific photo-crosslinker, p-benzoyl-L-phenylalanine, and a single C-terminal cysteine (Cys) handle was genetically engineered. Upon UV irradiation, the chimeric protein enables the Cys handle to couple with the native antibody in Fc-specific and covalent conjugation pattern, resulting in a novel thiolated antibody. Thus, an approach for the covalent, directional immobilization of antibodies to maleimide-modified magnetic nanoparticles (MNPs) was developed on the basis of the crosslinking between sulfhydryl and maleimide groups. The antibody-conjugated MNPs were applied in MNP-based enzyme-linked immunosorbent assay (ELISA) for the detection of carcinoembryonic antigen. The MNP-based ELISA presented a quantification linear range of 0.1-100 ng mL-1 and detection limit of 0.02 ng mL-1, which was approximately 100 times more sensitive than the traditional microplate ELISA (2.0 ng mL-1). Thus, the proposed antibody immobilization approach can be used in surface functionalization for the sensitive detection of various biomarkers.
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Affiliation(s)
- Jin-Bao Tang
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drugs, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China; Department of Biochemical Drugs, School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong, China; NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Hong-Ming Yang
- Department of Biochemical Drugs, School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Xiao-Yi Gao
- Department of Biochemical Drugs, School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Xian-Zhong Zeng
- Department of Biochemical Drugs, School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong, China
| | - Feng-Shan Wang
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drugs, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China; NMPA Key Laboratory for Quality Research and Evaluation of Carbohydrate-based Medicine, Shandong University, Jinan, 250012, Shandong, China.
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5
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Zhang XK, Yang HM, Li MR, Gao XY, Sun XW, Sun XF, Tang JB. Development of site-specific antibody-conjugated immunoliposomes for sensitive detection of disease biomarkers. NANOSCALE 2021; 13:17648-17654. [PMID: 34664606 DOI: 10.1039/d1nr04659d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Liposome-based immunoassay (LIA) is an attractive protocol for amplifying the detection signals because of the excellent ability of liposomes to encapsulate signal marker compounds. The antigen-binding activity of the conjugated antibodies on the liposomal surface is crucial for the specificity and sensitivity of LIA. We present here a general platform to ensure that antibodies can conjugate onto the surface of liposomes in a site-specific and oriented manner. A His-handle-modified antibody with Fc region-specific and covalent conjugation was first fabricated using a photoactivatable ZBpa-His tag that was engineered using the aminoacyl-tRNA synthetase/suppressor tRNA technique. Based on the high affinity between the His tag and divalent metal ions, the novel His-modified antibody was oriented onto the surface of nickel ion-modified liposomes encapsulating horseradish peroxidase. With the prostate-specific antigen as a model, the detection efficiency of the new immunoliposomes was evaluated by chemiluminescence immunoassay. The immunoliposomes exhibited a limit of detection of 0.2 pg mL-1, which was a six time improvement compared with that of the chemical-coupled antibody-liposome conjugates. Thus, the proposed immunoliposomes are expected to hold potential applications for the sensitive detection of various biomarkers in complicated serum samples.
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Affiliation(s)
- Xiao-Kun Zhang
- School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong Province, China.
| | - Hong-Ming Yang
- School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong Province, China.
| | - Meng-Ran Li
- School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong Province, China.
| | - Xiao-Yi Gao
- School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong Province, China.
| | - Xiao-Wei Sun
- Department of Clinical Laboratory, Affiliated Hospital of Weifang Medical University, Weifang, 261031, Shandong Province, China
| | - Xi-Feng Sun
- Department of Clinical Laboratory, The First Affiliated Hospital of Weifang Medical University, Weifang, 261031, Shandong Province, China
| | - Jin-Bao Tang
- School of Pharmacy, Weifang Medical University, Weifang, 261053, Shandong Province, China.
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Functionalization of Cellulose-Based Hydrogels with Bi-Functional Fusion Proteins Containing Carbohydrate-Binding Modules. MATERIALS 2021; 14:ma14123175. [PMID: 34207652 PMCID: PMC8227779 DOI: 10.3390/ma14123175] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 01/14/2023]
Abstract
Materials with novel and enhanced functionalities can be obtained by modifying cellulose with a range of biomolecules. This functionalization can deliver tailored cellulose-based materials with enhanced physical and chemical properties and control of biological interactions that match specific applications. One of the foundations for the success of such biomaterials is to efficiently control the capacity to combine relevant biomolecules into cellulose materials in such a way that the desired functionality is attained. In this context, our main goal was to develop bi-functional biomolecular constructs for the precise modification of cellulose hydrogels with bioactive molecules of interest. The main idea was to use biomolecular engineering techniques to generate and purify different recombinant fusions of carbohydrate binding modules (CBMs) with significant biological entities. Specifically, CBM-based fusions were designed to enable the bridging of proteins or oligonucleotides with cellulose hydrogels. The work focused on constructs that combine a family 3 CBM derived from the cellulosomal-scaffolding protein A from Clostridium thermocellum (CBM3) with the following: (i) an N-terminal green fluorescent protein (GFP) domain (GFP-CBM3); (ii) a double Z domain that recognizes IgG antibodies; and (iii) a C-terminal cysteine (CBM3C). The ability of the CBM fusions to bind and/or anchor their counterparts onto the surface of cellulose hydrogels was evaluated with pull-down assays. Capture of GFP-CBM3 by cellulose was first demonstrated qualitatively by fluorescence microscopy. The binding of the fusion proteins, the capture of antibodies (by ZZ-CBM3), and the grafting of an oligonucleotide (to CBM3C) were successfully demonstrated. The bioactive cellulose platform described here enables the precise anchoring of different biomolecules onto cellulose hydrogels and could contribute significatively to the development of advanced medical diagnostic sensors or specialized biomaterials, among others.
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8
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Zhang X, Wang Y, Zhong T, Feng X. Optimal spacer arm microenvironment for the immobilization of recombinant Protein A on heterofunctional amino-epoxy agarose supports. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.11.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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9
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Covalent immobilization of Bacillus subtilis lipase A on Fe3O4 nanoparticles by aldehyde tag: An ideal immobilization with minimal chemical modification. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.03.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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10
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Site-specific immobilization of lysozyme upon affinity chromatography resin by forecasting lysine activity and controlling pH and epoxy group density. J Chromatogr A 2019; 1592:192-196. [DOI: 10.1016/j.chroma.2019.02.066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 02/25/2019] [Accepted: 02/27/2019] [Indexed: 12/13/2022]
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11
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Oriented covalent immobilization of recombinant protein A on the glutaraldehyde activated agarose support. Int J Biol Macromol 2018; 120:100-108. [DOI: 10.1016/j.ijbiomac.2018.08.074] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/11/2018] [Accepted: 08/15/2018] [Indexed: 12/21/2022]
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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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Zhang X, Duan Y, Han N, Wu Y. Increase in IgG-binding Capacity of Recombinant Protein a Immobilized on Heterofunctional Amino and Epoxy Agarose. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1757-899x/381/1/012042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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14
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Chen D, Mei Y, Hu W, Li CM. Electrochemically enhanced antibody immobilization on polydopamine thin film for sensitive surface plasmon resonance immunoassay. Talanta 2018; 182:470-475. [DOI: 10.1016/j.talanta.2018.02.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/02/2018] [Accepted: 02/08/2018] [Indexed: 12/31/2022]
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15
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Säll A, Corbee D, Vikström S, Ottosson F, Persson H, Waldemarson S. Advancing the immunoaffinity platform AFFIRM to targeted measurements of proteins in serum in the pg/ml range. PLoS One 2018; 13:e0189116. [PMID: 29438379 PMCID: PMC5810979 DOI: 10.1371/journal.pone.0189116] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 11/20/2017] [Indexed: 02/02/2023] Open
Abstract
There is a great need for targeted protein assays with the capacity of sensitive measurements in complex samples such as plasma or serum, not the least for clinical purposes. Proteomics keeps generating hundreds of biomarker candidates that need to be transferred towards true clinical application through targeted verification studies and towards clinically applicable analysis formats. The immunoaffinity assay AFFIRM (AFFInity sRM) combines the sensitivity of recombinant single chain antibodies (scFv) for targeted protein enrichment with a specific mass spectrometry readout through selected reaction monitoring (SRM) in an automated workflow. Here we demonstrate a 100 times improved detection capacity of the assay down to pg/ml range through the use of oriented antibody immobilization to magnetic beads. This was achieved using biotin-tagged scFv coupled to streptavidin coated magnetic beads, or utilizing the FLAG tag for coupling to anti-FLAG antibody coated magnetic beads. An improved multiplexing capacity with an 11-plex setup was also demonstrated compared to a previous 3-plex setup, which is of great importance for the analysis of panels of biomarker targets.
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Affiliation(s)
- Anna Säll
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Daniel Corbee
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Sara Vikström
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Filip Ottosson
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Helena Persson
- Department of Immunotechnology, Lund University, Lund, Sweden
| | - Sofia Waldemarson
- Department of Immunotechnology, Lund University, Lund, Sweden
- * E-mail:
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16
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Surface engineering of poly(methylmethacrylate): Effects on fluorescence immunoassay. Biointerphases 2017; 12:02C415. [PMID: 28587470 DOI: 10.1116/1.4984010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The authors present surface engineering modifications through chemistry of poly(methylmethacrylate) (PMMA) that have dramatic effects on the result of surface-bound fluorescence immunoassays, both for specific and nonspecific signals. The authors deduce the most important effect to be clustering of antibodies on the surface leading to significant self-quenching. Secondary effects are attributable to the formation of sparse multilayers of antibody. The authors compare PMMA as an antibody support surface with ultraviolet-ozone oxidized PMMA and also to substrates that were, after the oxidation, surface modified by a four-unit poly(ethyleneglycol) carboxylic acid (PEG4), a branched tricarboxylic acid, and a series of carboxylic acid-terminated dendrimers, from generation 1.5 to 5.5. Fluorescence immunoassay and neutron reflectometry were used to compare the apparent antibody surface loading, antigen binding and nonspecific binding on these various surfaces using anti-human IgG as a model antibody, chemically coupled to the surface by amide formation. Simple physical adsorption of the antibody on PMMA resulted in a thick antibody multilayer with small antigen binding capacity. On the carboxylated surfaces, with chemical coupling, a simple monolayer was formed. The authors deduce that antibody clustering was driven by conformational inflexibility and high carboxylate density. The PEG4-modified surface was the most conformationally flexible. The dendrimer-modified interfaces showed a collapse and densification. In fluorescence immunoassay, the optimal combination of high specific and low nonspecific fluorescence signal was found for the G3.5 dendrimer.
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Zhang X, Duan Y, Zeng X. Improved Performance of Recombinant Protein A Immobilized on Agarose Beads by Site-Specific Conjugation. ACS OMEGA 2017; 2:1731-1737. [PMID: 30023643 PMCID: PMC6044777 DOI: 10.1021/acsomega.7b00362] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 04/17/2017] [Indexed: 05/21/2023]
Abstract
Protein A affinity adsorbent with high antibody-binding capacity plays a prominent part in the purification of biopharmaceuticals to decrease the manufacturing costs. We describe a site-specific covalent conjugation strategy for protein A to immobilize on agarose beads. Recombinant protein A, which has one cysteine introduced at the C terminus through genetic engineering technology, was immobilized site-specifically on maleimide-functionalized agarose beads by the thiol-maleimide reaction. As a comparison, the recombinant protein A was randomly immobilized on the aldehyde-functionalized agarose beads via free amino groups on the protein surface. The site-specific conjugation of recombinant protein A on the agarose beads was validated through the assay of free SH groups on the adsorbents using the Ellman's reagent. Adsorbents containing various amounts of protein A were used to adsorb antibody from human plasma. Analysis of immunoturbidimetry showed that the adsorbed fractions contained the 90.1% IgG, 4.2% IgA, and 5.7% IgM. The maximal antibodies-binding capacities with static adsorption and dynamic adsorption were approximately 64 and 50 mg, respectively, per swollen gram for site-specifically conjugated adsorbent and 31 and 26 mg for randomly conjugated adsorbent. Remarkably, the high antibody-binding capacity for site-specifically conjugated adsorbent outperformed the existing commercial protein A Sepharose (approximately 30 mg/g). The orientation of a protein is crucial for its activity after immobilization, and these results demonstrate that the site-specifically conjugated protein molecule is in a functionally active form to interact with the antibody with weak steric hindrance. The proposed approach may be an attractive strategy to synthesize affinity adsorbents with high-binding capacity.
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Affiliation(s)
- Xufeng Zhang
- College of Chemistry and
Chemical Engineering, Yunnan Normal University, Kunming 650092, PR China
| | - Ya Duan
- College of Chemistry and
Chemical Engineering, Yunnan Normal University, Kunming 650092, PR China
| | - Xi Zeng
- College of Chemistry and
Chemical Engineering, Yunnan Normal University, Kunming 650092, PR China
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18
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Shen M, Rusling J, Dixit CK. Site-selective orientated immobilization of antibodies and conjugates for immunodiagnostics development. Methods 2017; 116:95-111. [PMID: 27876681 PMCID: PMC5374010 DOI: 10.1016/j.ymeth.2016.11.010] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 01/11/2023] Open
Abstract
Immobilized antibody systems are the key to develop efficient diagnostics and separations tools. In the last decade, developments in the field of biomolecular engineering and crosslinker chemistry have greatly influenced the development of this field. With all these new approaches at our disposal, several new immobilization methods have been created to address the main challenges associated with immobilized antibodies. Few of these challenges that we have discussed in this review are mainly associated to the site-specific immobilization, appropriate orientation, and activity retention. We have discussed the effect of antibody immobilization approaches on the parameters on the performance of an immunoassay.
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Affiliation(s)
- Min Shen
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
| | - James Rusling
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
- Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269-3136
- Department of Cell Biology, University of Connecticut Health Center, Farmington, Connecticut 060
- School of Chemistry, National University of Ireland at Galway, Galway, Ireland
| | - Chandra K Dixit
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060
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19
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Scaffolds for oriented and close-packed immobilization of immunoglobulins. Biosens Bioelectron 2017; 89:810-821. [DOI: 10.1016/j.bios.2016.10.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/27/2016] [Accepted: 10/03/2016] [Indexed: 02/07/2023]
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20
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Fc-specific biotinylation of antibody using an engineered photoactivatable Z–Biotin and its biosensing application. Anal Chim Acta 2017; 949:76-82. [DOI: 10.1016/j.aca.2016.10.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 10/19/2016] [Accepted: 10/26/2016] [Indexed: 01/01/2023]
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21
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Vaghi V, Potrich C, Lunelli L, Facci P, Pasquardini L, Vanzetti L, Pederzolli C. Bio-functional surfaces for the immunocapture of AGO2-bound microRNAs. Colloids Surf B Biointerfaces 2016; 146:746-53. [PMID: 27449965 DOI: 10.1016/j.colsurfb.2016.06.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 06/28/2016] [Indexed: 12/17/2022]
Abstract
MicroRNAs (miRNAs) are endogenous, small (18-24nt), non-coding RNAs that regulate gene expression. Among miRNAs, those bound to the AGO2 protein are the functionally active fraction which mediates the cell regulatory processes and regulate messages exchanged by cells. Several methods have been developed to purify this fraction of microRNAs, such as immunoprecipitation and immunoprecipitation-derived techniques. However, all these techniques are generally recognized as technically complicated and time consuming. Here, a new bio-functional surface for the specific capture of AGO2-bound microRNAs is proposed. Starting from a silicon oxide surface, a protein A layer was covalently bound via epoxy chemistry to orient specific anti-AGO2 antibodies on the surface. The anti-AGO2 antibodies captured the AGO2 protein present in cell lysate and in human plasma. The AGO2-bound microRNAs were then released by enzymatic digestion and detected via RT-qPCR. Control surfaces were also prepared and tested. Every step in the preparation of the bio-functional surfaces was fully characterized from the chemical, morphological and functional point of view. The resulting bio-functional surface is able to specifically capture the AGO2-bound miRNAs from biologically-relevant samples, such as cell lysate and human plasma. These samples contain different proportions of AGO2-bound microRNAs, as reliably detected with the immunocapture method here proposed. This work opens new perspectives for a simple and faster method to isolate not only AGO2-bound microRNAs, but also the multiprotein complex containing AGO2 and miRNAs.
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Affiliation(s)
- V Vaghi
- Fondazione Bruno Kessler, Laboratory of Biomolecular Sequence and Structure Analysis for Health, via Sommarive 18, I-38123 Povo (Trento), Italy
| | - C Potrich
- Fondazione Bruno Kessler, Laboratory of Biomolecular Sequence and Structure Analysis for Health, via Sommarive 18, I-38123 Povo (Trento), Italy; CNR - Consiglio Nazionale delle Ricerche, Istituto di Biofisica, via alla Cascata 56/C, I-38123 Povo (Trento), Italy.
| | - L Lunelli
- Fondazione Bruno Kessler, Laboratory of Biomolecular Sequence and Structure Analysis for Health, via Sommarive 18, I-38123 Povo (Trento), Italy; CNR - Consiglio Nazionale delle Ricerche, Istituto di Biofisica, via alla Cascata 56/C, I-38123 Povo (Trento), Italy
| | - P Facci
- CNR - Consiglio Nazionale delle Ricerche, Istituto di Biofisica, via De Marini 6, I-16149 Genova, Italy
| | - L Pasquardini
- Fondazione Bruno Kessler, Laboratory of Biomolecular Sequence and Structure Analysis for Health, via Sommarive 18, I-38123 Povo (Trento), Italy
| | - L Vanzetti
- Fondazione Bruno Kessler, Center for Materials and Microsystems, MNF-MateC, via Sommarive 18, I-38123 Povo (Trento), Italy
| | - C Pederzolli
- Fondazione Bruno Kessler, Laboratory of Biomolecular Sequence and Structure Analysis for Health, via Sommarive 18, I-38123 Povo (Trento), Italy
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22
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Säll A, Persson H, Ohlin M, Borrebaeck CAK, Wingren C. Advancing the global proteome survey platform by using an oriented single chain antibody fragment immobilization approach. N Biotechnol 2016; 33:503-13. [PMID: 26703809 DOI: 10.1016/j.nbt.2015.12.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 11/27/2015] [Accepted: 12/03/2015] [Indexed: 11/17/2022]
Abstract
Increasing the understanding of a proteome and how its protein composition is affected by for example different diseases, such as cancer, has the potential to improve strategies for early diagnosis and therapeutics. The Global Proteome Survey or GPS is a method that combines mass spectrometry and affinity enrichment with the use of antibodies. The technology enables profiling of complex proteomes in a species independent manner. The sensitivity of GPS, and other methods relying on affinity enrichment, is largely affected by the activity of the exploited affinity reagent. We here present an improvement of the GPS platform by utilizing an antibody immobilization approach which ensures a controlled immobilization process of the antibody to the magnetic bead support. More specifically, we make use of an antibody format that enables site-directed biotinylation and use this in combination with streptavidin coated magnetic beads. The performance of the expanded GPS platform was evaluated by profiling yeast proteome samples. We demonstrate that the oriented antibody immobilization strategy increases the ability of the GPS platform and results in larger fraction of functional antibodies. Additionally, we show that this new antibody format enabled in-solution capture, i.e. immobilization of the antibodies after sample incubation. A workflow has been established that permit the use of an oriented immobilization strategy for the GPS platform.
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Affiliation(s)
- Anna Säll
- Department of Immunotechnology, Lund University, Medicon Village (House 406), SE-223 81 Lund, Sweden
| | - Helena Persson
- Department of Immunotechnology, Lund University, Medicon Village (House 406), SE-223 81 Lund, Sweden; Science for Life Laboratory, Royal Institute of Technology, Stockholm, Sweden
| | - Mats Ohlin
- Department of Immunotechnology, Lund University, Medicon Village (House 406), SE-223 81 Lund, Sweden
| | - Carl A K Borrebaeck
- Department of Immunotechnology, Lund University, Medicon Village (House 406), SE-223 81 Lund, Sweden.
| | - Christer Wingren
- Department of Immunotechnology, Lund University, Medicon Village (House 406), SE-223 81 Lund, Sweden.
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Vashist SK, Schneider EM, Barth E, Luong JH. Surface plasmon resonance-based immunoassay for procalcitonin. Anal Chim Acta 2016; 938:129-36. [DOI: 10.1016/j.aca.2016.08.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/02/2016] [Accepted: 08/04/2016] [Indexed: 01/23/2023]
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24
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Oriented Covalent Immobilization of Engineered ZZ-Cys onto Maleimide-Sepharose: An Affinity Platform for IgG Purification. Chromatographia 2016. [DOI: 10.1007/s10337-016-3146-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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25
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Wronska MA, O'Connor IB, Tilbury MA, Srivastava A, Wall JG. Adding Functions to Biomaterial Surfaces through Protein Incorporation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:5485-5508. [PMID: 27164952 DOI: 10.1002/adma.201504310] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 03/16/2016] [Indexed: 06/05/2023]
Abstract
The concept of biomaterials has evolved from one of inert mechanical supports with a long-term, biologically inactive role in the body into complex matrices that exhibit selective cell binding, promote proliferation and matrix production, and may ultimately become replaced by newly generated tissues in vivo. Functionalization of material surfaces with biomolecules is critical to their ability to evade immunorecognition, interact productively with surrounding tissues and extracellular matrix, and avoid bacterial colonization. Antibody molecules and their derived fragments are commonly immobilized on materials to mediate coating with specific cell types in fields such as stent endothelialization and drug delivery. The incorporation of growth factors into biomaterials has found application in promoting and accelerating bone formation in osteogenerative and related applications. Peptides and extracellular matrix proteins can impart biomolecule- and cell-specificities to materials while antimicrobial peptides have found roles in preventing biofilm formation on devices and implants. In this progress report, we detail developments in the use of diverse proteins and peptides to modify the surfaces of hard biomaterials in vivo and in vitro. Chemical approaches to immobilizing active biomolecules are presented, as well as platform technologies for isolation or generation of natural or synthetic molecules suitable for biomaterial functionalization.
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Affiliation(s)
- Małgorzata A Wronska
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Iain B O'Connor
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Maura A Tilbury
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - Akshay Srivastava
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
| | - J Gerard Wall
- Microbiology and Center for Research in Medical Devices (CÚRAM), National University of Ireland, Galway, Ireland
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26
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Liu Y, Yu J. Oriented immobilization of proteins on solid supports for use in biosensors and biochips: a review. Mikrochim Acta 2015. [DOI: 10.1007/s00604-015-1623-4] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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27
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Vashist SK, Schneider EM, Luong JHT. Surface plasmon resonance-based immunoassay for human C-reactive protein. Analyst 2015; 140:4445-52. [DOI: 10.1039/c5an00690b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A rapid and highly-sensitive surface plasmon resonance (SPR)-based immunoassay (IA) has been developed and validated for detecting human C-reactive protein (CRP), a specific biomarker for inflammatory and metabolic disorders, and infections.
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Affiliation(s)
- S. K. Vashist
- HSG-IMIT – Institut für Mikro- und Informationstechnik
- 79110 Freiburg
- Germany
- Laboratory for MEMS Applications
- Department of Microsystems Engineering – IMTEK
| | - E. M. Schneider
- Sektion Experimentelle Anaesthesiologie
- University Hospital Ulm
- 89081 Ulm
- Germany
| | - J. H. T. Luong
- Innovative Chromatography Group
- Irish Separation Science Cluster (ISSC)
- Department of Chemistry and Analytical
- Biological Chemistry Research Facility (ABCRF)
- University College Cork
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