1
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Melodia D, Di Pietro Z, Cao C, Stenzel MH, Chapman R. Traceless pH-Sensitive Antibody Conjugation Inspired by Citraconic Anhydride. Biomacromolecules 2022; 23:5322-5329. [PMID: 36395470 DOI: 10.1021/acs.biomac.2c01125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We introduce a pH-sensitive amide bond, inspired by citraconic anhydride, for the reversible conjugation of polymers to the lysine residues of proteins and antibodies. The pH sensitivity arises from a conformation lock at the end of the polymer, which we introduce by means of a Diels-Alder reaction, that positions a carboxylic acid close to the amide after conjugation occurs. The amide is stable over weeks at pH 7.4 but sensitive to hydrolysis at pH 5.5 and below, returning the amine to its original state. The pH sensitivity can be tuned by positioning secondary amide groups nearby. We use this approach to PEGylate an antibody to human serum albumin at high dilution and demonstrate successful recovery of the activity after hydrolysis at pH 5.5. These results offer a convenient and traceless approach to protein and antibody functionalization.
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Affiliation(s)
- Daniele Melodia
- School of Chemistry, UNSW Sydney, Kensington, NSW 2052, Australia
| | - Zachary Di Pietro
- School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | - Cheng Cao
- School of Chemistry, UNSW Sydney, Kensington, NSW 2052, Australia
| | | | - Robert Chapman
- School of Chemistry, UNSW Sydney, Kensington, NSW 2052, Australia.,School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
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2
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Abstract
Click chemistry has been established rapidly as one of the most valuable methods for the chemical transformation of complex molecules. Due to the rapid rates, clean conversions to the products, and compatibility of the reagents and reaction conditions even in complex settings, it has found applications in many molecule-oriented disciplines. From the vast landscape of click reactions, approaches have emerged in the past decade centered around oxidative processes to generate in situ highly reactive synthons from dormant functionalities. These approaches have led to some of the fastest click reactions know to date. Here, we review the various methods that can be used for such oxidation-induced "one-pot" click chemistry for the transformation of small molecules, materials, and biomolecules. A comprehensive overview is provided of oxidation conditions that induce a click reaction, and oxidation conditions are orthogonal to other click reactions so that sequential "click-oxidation-click" derivatization of molecules can be performed in one pot. Our review of the relevant literature shows that this strategy is emerging as a powerful approach for the preparation of high-performance materials and the generation of complex biomolecules. As such, we expect that oxidation-induced "one-pot" click chemistry will widen in scope substantially in the forthcoming years.
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Affiliation(s)
- Bauke Albada
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6807 WE Wageningen, The Netherlands
| | - Jordi F Keijzer
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6807 WE Wageningen, The Netherlands
| | - Han Zuilhof
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6807 WE Wageningen, The Netherlands.,School of Pharmaceutical Sciences and Technology, Tianjin University, Tianjin 300072, China.,Department of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, 21589 Jeddah, Saudi Arabia
| | - Floris van Delft
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6807 WE Wageningen, The Netherlands.,Synaffix BV, Industrielaan 63, 5349 AE, Oss, The Netherlands
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3
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Suchý M, Kirby A, Sabloff T, Mulvihill EE, Shuhendler AJ. Dansyl–NA 3 conjugates for glycoprotein detection through fluorescent tagging and native gel electrophoresis. NEW J CHEM 2021. [DOI: 10.1039/d1nj02393d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An aldehyde-reactive fluorophore has been prepared that can afford the fluorescent detection of serum glycoproteins by native gel electrophoresis.
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Affiliation(s)
- Mojmír Suchý
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Alexia Kirby
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
| | - Tara Sabloff
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Erin E. Mulvihill
- University of Ottawa Heart Institute
- Ottawa
- Canada
- Department of Biochemistry, Microbiology and Immunology
- University of Ottawa
| | - Adam J. Shuhendler
- Department of Chemistry & Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
- University of Ottawa Heart Institute
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4
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Chou CH, Lin PC. Glycan-Directed Grafting-from Polymerization of Immunoglobulin G: Site-Selectively Modified IgG-Polymer Conjugates with Preserved Biological Activity. Biomacromolecules 2018; 19:3086-3095. [PMID: 29890078 DOI: 10.1021/acs.biomac.8b00669] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Antibody and related antibody drugs for the treatment of malignancies have led to progress in targeted cancer therapy. Preparation of diverse antibody conjugates is critical for preclinical and clinical applications. However, precise control in tagging molecules at specific locations on antibodies is essential to preserve their native function. In this study, a synthetic boronic acid (BA)-tosyl initiator was used to trigger a glycan-directed modification of IgGs, and the obtained IgG macroinitiators allowed a growth of the poly N-isopropylacrylamide (PNIPAAm) chains specifically at Fc-domains. Therefore, the PNIPAAm chains are located away from the critical antigen-binding domains (Fab), which could reasonably prevent the loss of biological activity after the attachment of polymer chains. According to the proposed strategy, a site-selectively modified anticoncanavalin A (Con A) antibody-PNIPAAm conjugate showed 6-times higher efficiency in the binding of targeted Con A antigen to a randomly conjugated anti-Con A antibody-PNIPAAm conjugate. In this study, we developed the first chemical strategy for the site-specific preparation of IgG-polymer conjugates with conserved biological activity as well as intact glycan structures.
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Affiliation(s)
- Chih-Hung Chou
- Department of Chemistry , National Sun Yat-sen University 70, Lienhai Road , Kaohsiung 80424 , Taiwan
| | - Po-Chiao Lin
- Department of Chemistry , National Sun Yat-sen University 70, Lienhai Road , Kaohsiung 80424 , Taiwan
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5
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Nisal R, P. Jose G, Shanbhag C, Kalia J. Rapid and reversible hydrazone bioconjugation in cells without the use of extraneous catalysts. Org Biomol Chem 2018; 16:4304-4310. [DOI: 10.1039/c8ob00946e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Rapid, catalyst-free and reversible bioconjugation in mammalian cells.
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Affiliation(s)
- Rahul Nisal
- Indian Institute of Science Education and Research (IISER) Pune
- Pune-411008
- India
| | - Gregor P. Jose
- Indian Institute of Science Education and Research (IISER) Pune
- Pune-411008
- India
| | - Chitra Shanbhag
- Indian Institute of Science Education and Research (IISER) Pune
- Pune-411008
- India
| | - Jeet Kalia
- Indian Institute of Science Education and Research (IISER) Pune
- Pune-411008
- India
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6
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Lee Y, Jeong J, Lee G, Moon JH, Lee MK. Covalent and Oriented Surface Immobilization of Antibody Using Photoactivatable Antibody Fc-Binding Protein Expressed in Escherichia coli. Anal Chem 2016; 88:9503-9509. [DOI: 10.1021/acs.analchem.6b02071] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Yeolin Lee
- Hazards Monitoring Bionano Research
Center, ‡Disease Target Structure Research
Center, Korea Research Institute of Bioscience and Biotechnology, and §Department of
Nanobiotechnology, University of Science and Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jiyun Jeong
- Hazards Monitoring Bionano Research
Center, ‡Disease Target Structure Research
Center, Korea Research Institute of Bioscience and Biotechnology, and §Department of
Nanobiotechnology, University of Science and Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Gabi Lee
- Hazards Monitoring Bionano Research
Center, ‡Disease Target Structure Research
Center, Korea Research Institute of Bioscience and Biotechnology, and §Department of
Nanobiotechnology, University of Science and Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jeong Hee Moon
- Hazards Monitoring Bionano Research
Center, ‡Disease Target Structure Research
Center, Korea Research Institute of Bioscience and Biotechnology, and §Department of
Nanobiotechnology, University of Science and Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Myung Kyu Lee
- Hazards Monitoring Bionano Research
Center, ‡Disease Target Structure Research
Center, Korea Research Institute of Bioscience and Biotechnology, and §Department of
Nanobiotechnology, University of Science and Technology, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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7
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8
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McKay CS, Finn MG. Click chemistry in complex mixtures: bioorthogonal bioconjugation. CHEMISTRY & BIOLOGY 2014; 21:1075-101. [PMID: 25237856 PMCID: PMC4331201 DOI: 10.1016/j.chembiol.2014.09.002] [Citation(s) in RCA: 537] [Impact Index Per Article: 53.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 09/01/2014] [Accepted: 09/02/2014] [Indexed: 01/18/2023]
Abstract
The selective chemical modification of biological molecules drives a good portion of modern drug development and fundamental biological research. While a few early examples of reactions that engage amine and thiol groups on proteins helped establish the value of such processes, the development of reactions that avoid most biological molecules so as to achieve selectivity in desired bond-forming events has revolutionized the field. We provide an update on recent developments in bioorthogonal chemistry that highlights key advances in reaction rates, biocompatibility, and applications. While not exhaustive, we hope this summary allows the reader to appreciate the rich continuing development of good chemistry that operates in the biological setting.
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Affiliation(s)
- Craig S McKay
- School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - M G Finn
- School of Chemistry & Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, USA.
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9
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Adak AK, Li BY, Huang LD, Lin TW, Chang TC, Hwang KC, Lin CC. Fabrication of antibody microarrays by light-induced covalent and oriented immobilization. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10452-10460. [PMID: 24903424 DOI: 10.1021/am502011r] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Antibody microarrays have important applications for the sensitive detection of biologically important target molecules and as biosensors for clinical applications. Microarrays produced by oriented immobilization of antibodies generally have higher antigen-binding capacities than those in which antibodies are immobilized with random orientations. Here, we present a UV photo-cross-linking approach that utilizes boronic acid to achieve oriented immobilization of an antibody on a surface while retaining the antigen-binding activity of the immobilized antibody. A photoactive boronic acid probe was designed and synthesized in which boronic acid provided good affinity and specificity for the recognition of glycan chains on the Fc region of the antibody, enabling covalent tethering to the antibody upon exposure to UV light. Once irradiated with optimal UV exposure (16 mW/cm(2)), significant antibody immobilization on a boronic acid-presenting surface with maximal antigen detection sensitivity in a single step was achieved, thus obviating the necessity of prior antibody modifications. The developed approach is highly modular, as demonstrated by its implementation in sensitive sandwich immunoassays for the protein analytes Ricinus communis agglutinin 120, human prostate-specific antigen, and interleukin-6 with limits of detection of 7.4, 29, and 16 pM, respectively. Furthermore, the present system enabled the detection of multiple analytes in samples without any noticeable cross-reactivities. Antibody coupling via the use of boronic acid and UV light represents a practical, oriented immobilization method with significant implications for the construction of a large array of immunosensors for diagnostic applications.
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Affiliation(s)
- Avijit K Adak
- Department of Chemistry, National Tsing Hua University , Hsinchu 300, Taiwan
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10
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Kitov PI, Vinals DF, Ng S, Tjhung KF, Derda R. Rapid, Hydrolytically Stable Modification of Aldehyde-Terminated Proteins and Phage Libraries. J Am Chem Soc 2014; 136:8149-52. [DOI: 10.1021/ja5023909] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pavel I. Kitov
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Daniel F. Vinals
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Simon Ng
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Katrina F. Tjhung
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
| | - Ratmir Derda
- Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2G2
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11
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Medina-Casanellas S, Benavente F, Barbosa J, Sanz-Nebot V. Preparation and evaluation of an immunoaffinity sorbent for the analysis of opioid peptides by on-line immunoaffinity solid-phase extraction capillary electrophoresis–mass spectrometry. Anal Chim Acta 2012; 717:134-42. [DOI: 10.1016/j.aca.2011.11.057] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 11/23/2011] [Accepted: 11/26/2011] [Indexed: 12/25/2022]
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12
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Zelaya IA, Anderson JAH, Owen MDK, Landes RD. Evaluation of spectrophotometric and HPLC methods for shikimic acid determination in plants: models in glyphosate-resistant and -susceptible crops. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2011; 59:2202-12. [PMID: 21338087 DOI: 10.1021/jf1043426] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Endogenous shikimic acid determinations are routinely used to assess the efficacy of glyphosate in plants. Numerous analytical methods exist in the public domain for the detection of shikimic acid, yet the most commonly cited comprise spectrophotometric and high-pressure liquid chromatography (HPLC) methods. This paper compares an HPLC and two spectrophotometric methods (Spec 1 and Spec 2) and assesses the effectiveness in the detection of shikimic acid in the tissues of glyphosate-treated plants. Furthermore, the study evaluates the versatility of two acid-based shikimic acid extraction methods and assesses the longevity of plant extract samples under different storage conditions. Finally, Spec 1 and Spec 2 are further characterized with respect to (1) the capacity to discern between shikimic acid and chemically related alicyclic hydroxy acids, (2) the stability of the chromophore (t1/2), (3) the detection limits, and (4) the cost and simplicity of undertaking the analytical procedure. Overall, spectrophotometric methods were more cost-effective and simpler to execute yet provided a narrower detection limit compared to HPLC. All three methods were specific to shikimic acid and detected the compound in the tissues of glyphosate-susceptible crops, increasing exponentially in concentration within 24 h of glyphosate application and plateauing at approximately 72 h. Spec 1 estimated more shikimic acid in identical plant extract samples compared to Spec 2 and, likewise, HPLC detection was more effective than spectrophotometric determinations. Given the unprecedented global adoption of glyphosate-resistant crops and concomitant use of glyphosate, an effective and accurate assessment of glyphosate efficacy is important. Endogenous shikimic acid determinations are instrumental in corroborating the efficacy of glyphosate and therefore have numerous applications in herbicide research and related areas of science as well as resolving many commercial issues as a consequence of glyphosate utilization.
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Affiliation(s)
- Ian A Zelaya
- Department of Agronomy, Iowa State University, Ames, Iowa 50011-1011, USA.
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13
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Lin PC, Chen SH, Wang KY, Chen ML, Adak AK, Hwu JRR, Chen YJ, Lin CC. Fabrication of oriented antibody-conjugated magnetic nanoprobes and their immunoaffinity application. Anal Chem 2010; 81:8774-82. [PMID: 19874051 DOI: 10.1021/ac9012122] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In an attempt to fabricate highly active immunoprobes for serum biomarker detection, we report a simple and effective method for site-specific and self-oriented immobilization of antibodies on magnetic nanoparticles (MNPs). Through boronate formation, the carbohydrate moiety within the constant domain, Fc, of the antibody can be specifically and covalently linked to a boronic acid-functionalized MNP (BA@MNP) without hindering the antigen binding domain, Fab. The performance was evaluated by immunoaffinity extraction of multiple serum antigens. Compared with the random immobilization of antibody on a MNP, the antibody self-oriented immunoprobe provides long-term stability (>2 months) and 5-fold extraction efficiency. It also provides 5-fold improved sensitivity at a low nM range (0.4 nM), presumably through enhanced antibody@MNP activity. In addition, false-positive detections arising from nonspecific binding can be completely minimized by effective surface protection using concentration-dependent dextran blocking. Compared with conventional antibody site-specific immobilization through protein G, this new BA-mediated covalent antibody immobilization provides interference-free extraction resulting from noncovalent immobilization of antibody by protein G. The new immunoassay was applied in comparative profiling of serum amyloid P (SAP), serum amyloid A (SAA), and C-reactive protein (CRP) in human serum. Our triple immunoassay revealed a distinct pattern among normal patients, patients with cancer, and patients with cardiovascular disease. Using the previously reported quantization capability of the MALDI MS readout, we expect that this site-specific immunonanoprobe-based immunoassay can be highly active, rapid, and accurate in nanodiagnosis.
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Affiliation(s)
- Po-Chiao Lin
- Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan
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14
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Mindt TL, Jungi V, Wyss S, Friedli A, Pla G, Novak-Hofer I, Grünberg J, Schibli R. Modification of Different IgG1 Antibodies via Glutamine and Lysine using Bacterial and Human Tissue Transglutaminase. Bioconjug Chem 2007; 19:271-8. [DOI: 10.1021/bc700306n] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas L. Mindt
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Vera Jungi
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Sara Wyss
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Alexandra Friedli
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Gloria Pla
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Ilse Novak-Hofer
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Jürgen Grünberg
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
| | - Roger Schibli
- Department of Chemistry and Applied Biosciences of the ETH Zurich, 8093 Zurich, Switzerland, Center for Radiopharmaceutical Science ETH-PSI-USZ, Paul Scherrer Institute, 5232 Villigen, Switzerland, and Facultat de Farmàcia, Universitat de Barcelona, 08028 Barcelona, Spain
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15
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Li L, Yan J, Zhao MP. Improvement of the performance of an immunoaffinity extraction method via region-specific immobilization of IgG. J Chromatogr A 2006; 1103:350-5. [PMID: 16387318 DOI: 10.1016/j.chroma.2005.12.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2005] [Revised: 12/02/2005] [Accepted: 12/06/2005] [Indexed: 10/25/2022]
Abstract
Using papaverine as a model target, an immunoaffinity column of high selectivity and binding capacity was prepared by utilizing covalent linkage between the Fc portion of IgG and the surface of Sepharose 4B support. Compared with the commonly used random coupling method, the binding capacity of the region-specific immobilized antibodies was increased from 0.04 to 0.2 mol of antigens/mol of antibodies and a much larger concentration factor was thus achieved. The obtained immunoaffinity column has been successfully used in pretreatment of pericarpium papaveris samples. The method offers an improved approach to immunoaffinity extraction that should be useful for purification and concentration of other targeted compounds in highly complex mixture.
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Affiliation(s)
- Lin Li
- Institute of Analytical Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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16
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Affiliation(s)
- Arthur S Perlin
- Department of Chemistry, McGill University, Montreal, Canada, PQ H3A 2K6
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17
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Kelly LS, Kozak M, Walker T, Pierce M, Puett D. Lectin immunoassays using antibody fragments to detect glycoforms of human chorionic gonadotropin secreted by choriocarcinoma cells. Anal Biochem 2005; 338:253-62. [PMID: 15745745 DOI: 10.1016/j.ab.2004.12.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2004] [Indexed: 11/24/2022]
Abstract
Immobilized antibodies are commonly used to recognize and bind proteins of interest from heterogeneous samples; however, subsequent probing of the glycan(s) of captured glycoproteins with lectins is limited by interference due to the competing oligosaccharides inherently present on antibodies. To prepare capture antibodies with significantly reduced binding of any lectin, the glycosylated protein domains (F(c)) of two anti-human chorionic gonadotropin antibodies were proteolytically removed. Depending on the individual antibody, usable fragments were generated either directly or effectively separated after cleavage through partial reduction and thiol coupling to an appropriate matrix. Importantly, neither method required additional purification of the antibody fragments before immobilization. Binding of a variety of lectins to the functional fragments was reduced by approximately 90% compared with intact immunoglobulin G in both an enzyme-linked immunosorbent assay and a biosensor format. These carbohydrate-free antibody fragments were used to bind the glycoprotein hormone, human chorionic gonadotropin, produced during normal pregnancy and that secreted by three human choriocarcinoma cell lines. Lectins bound to the unpurified gonadotropin glycoforms in distinct patterns consistent with glycan structures previously elucidated by others on hormone samples purified from the urine of pregnant women and of patients with choriocarcinoma. The methods described in this article are applicable for generating capture reagents universally suitable for lectin immunoassays of glycoproteins.
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Affiliation(s)
- Lisa S Kelly
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, GA 30602, USA
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18
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Guillemard V, Uri Saragovi H. Prodrug chemotherapeutics bypass p-glycoprotein resistance and kill tumors in vivo with high efficacy and target-dependent selectivity. Oncogene 2004; 23:3613-21. [PMID: 15034547 DOI: 10.1038/sj.onc.1207463] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Doxorubicin intercalates into DNA, causes double-strand breaks, and leads to apoptotic death. Limitations to the efficacy and therapeutic index of doxorubicin include poor tumor selectivity, high systemic toxicity, and the development of resistance, especially p-glycoprotein (p-gp)-mediated. We chemically coupled doxorubicin to a monoclonal antibody directed to the insulin-like growth factor-1 receptor, a receptor highly overexpressed in most tumors and validated as a tumor target. The prodrug conjugate bounded to tumor cells selectively, and accumulated efficiently and only in receptor-expressing cells. The conjugate was processed to release free doxorubicin inside target cells leading to selective toxicity, had >200-fold improved therapeutic index, and in vivo reduced tumor load with no systemic toxicity. Importantly, the prodrug conjugate is not subject to p-gp efflux and can bypass resistance in vivo. Our studies define a strategy to develop improved and more selective anticancer agents.
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Affiliation(s)
- Veronique Guillemard
- Department of Pharmacology and Therapeutics, McGill University, 3655 Drummond Ave., 1320 Montréal, QC, Canada H3G 1Y6
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19
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Bílková Z, Slováková M, Horák D, Lenfeld J, Churácek J. Enzymes immobilized on magnetic carriers: efficient and selective system for protein modification. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 770:177-81. [PMID: 12013224 DOI: 10.1016/s1570-0232(02)00037-5] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In order to obtain an economical, efficient and selective system for glycoprotein modification we prepared reactors with immobilized neuraminidase or (and) galactose oxidase. High storage and operational stability of the enzyme reactors was obtained by their immobilization through the carbohydrate parts of the enzyme molecules to hydrazide-modified supports. Magnetic and non-magnetic forms of bead cellulose and poly(HEMA-co-EDMA) microspheres were used for immobilization. These reactors can be used almost universally for the activation of ligands and for labelling of substances having a carbohydrate moiety.
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Affiliation(s)
- Z Bílková
- Department of Biological and Biochemical Sciences, University of Pardubice, Czech Republic.
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20
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Bílková Z, Slováková M, Lycka A, Horák D, Lenfeld J, Turková J, Churácek J. Oriented immobilization of galactose oxidase to bead and magnetic bead cellulose and poly(HEMA-co-EDMA) and magnetic poly(HEMA-co-EDMA) microspheres. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 770:25-34. [PMID: 12013233 DOI: 10.1016/s0378-4347(01)00439-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
In order to obtain an active and stable oxidation reactor for daily use in biochemical laboratory we decided to immobilize galactose oxidase orientedly through a carbohydrate chain to the magnetic carriers. We used hydrazide derivatives of non-magnetic and magnetic bead cellulose and of magnetic and non-magnetic poly(HEMA-co-EDMA) microspheres. Activation of the enzyme molecules was done by sodium periodate in the presence of supplements (fucose, CuSO4, catalase). Orientedly immobilized galactose oxidase presents high storage stability and lower susceptibility to inappropriate microenvironmental conditions. Reactor reactivated by three pulses of D-galactose retained practically 100% of its native activity after 6 months. The positive properties of both magnetic carriers were entirely confirmed.
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Affiliation(s)
- Zuzana Bílková
- Department of Biological and Biochemical Sciences, University of Pardubice, Czech Republic.
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21
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Nisnevitch M, Firer MA. The solid phase in affinity chromatography: strategies for antibody attachment. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2001; 49:467-80. [PMID: 11694295 DOI: 10.1016/s0165-022x(01)00214-7] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Antibodies (Ab) are commonly used in affinity chromatography (AC) as a versatile and specific means of isolating target molecules from complex mixtures. A number of procedures have been developed to immobilize antibodies on the solid matrix. Some of these methods couple the antibody via chemical groups that may be important for specific recognition of antigen, resulting in loss of functionality in a proportion of the antibodies. In other methods, the outcome of immobilization is coupling via unique sites in the Fc region of the antibody molecule, ensuring orientation of the antibody combining sites (Fab) towards the mobile phase. This review discusses the advantages and disadvantages of the various methods available for immobilization and outlines protocols for site-directed, covalent coupling of the antibody to the solid phase that essentially retains the activity of the antibody.
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Affiliation(s)
- M Nisnevitch
- Immunology Laboratory, E. Katzir Biotechnology Program, Research Institute, College of Judea and Samaria, P.O. Box 3, Ariel, 44837, Israel
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22
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Abstract
A calorimetric approach is described for analysing the kinetics of periodate oxidation on a series of monosaccharidic substrates. Rate constants at several temperatures were calculated from the calorimetric decay curves that are proportional to the rate of conversion. Arrhenius plots provided the activation parameters for the various carbohydrates and a linear correlation was found between the values of enthalpy and entropy of activation. The dependence of the values of kinetic rates on stereochemistry is interpreted in terms of conformational probability of the reactive state. The suitability of the calorimetric method to track the kinetic process of slow reactions is emphasised, in particular its ability to monitor, directly and continuously, the course of the reaction.
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Affiliation(s)
- F Sussich
- Department of Biochemistry, Biophysics and Macromolecular Chemistry, University of Trieste, Italy
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Hage DS. Periodate oxidation of antibodies for site-selective immobilization in immunoaffinity chromatography. Methods Mol Biol 2000; 147:69-82. [PMID: 10857086 DOI: 10.1007/978-1-60327-261-2_7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- D S Hage
- Department of Chemistry, University of Nebraska, Lincoln, USA
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25
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Nisnevitch M, Kolog-Gulco M, Trombka D, Green BS, Firer MA. Immobilization of antibodies onto glass wool. JOURNAL OF CHROMATOGRAPHY. B, BIOMEDICAL SCIENCES AND APPLICATIONS 2000; 738:217-23. [PMID: 10718639 DOI: 10.1016/s0378-4347(99)00514-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The immobilization of antibodies onto solid phases in an efficient and activity-retaining form is an important goal for both research and industry. Methods have been developed for the site-directed attachment of antibodies to agarose by oxidation of the carbohydrate moieties in their Fc region. Similar attachment to silianized supports have not been as successful. Here we describe a novel combination protocol for the site-directed attachment of periodate oxidized, goat polyclonal antibodies to glass wool fibers activated with 3-aminopropyltriethoxysilane. The study demonstrates that this procedure results in effective immobilization of polyclonal antibodies that retain their antigen-binding capacity. This protocol should prove useful in the development of more efficient and effective glass-based immunosupports.
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Affiliation(s)
- M Nisnevitch
- E. Katzir Biotechnology Program, Research Institute, College of Judea and Samaria, Ariel, Israel
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