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Cheng Y, Gao Y, Zhang S, Zou Y, Zhao G, Zheng L, Hou B, Li M, Dong J. Detection of calcitonin gene-related peptide based on increased antigen-driven interaction with antibody variable regions. Front Bioeng Biotechnol 2024; 12:1395330. [PMID: 38882635 PMCID: PMC11176539 DOI: 10.3389/fbioe.2024.1395330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 05/08/2024] [Indexed: 06/18/2024] Open
Abstract
Introduction: Calcitonin gene-related peptide (CGRP) is involved in trigeminal neuralgia and migraine, and measuring the CGRP concentration in the serum is crucial for the early prediction of these conditions. Current methods for CGRP detection are primarily radioimmunoassay, which needs radioactive substances and enzyme-linked immunosorbent assays (ELISAs) which need long detection time and some have a narrow detection range. Methods: The genes of anti-CGRP antibody variable regions were cloned into pDong1 vector to obtain pDong1/Fab-CGRP, with which phage-Fab was prepared, and the concentration of CGRP was detected by competitive ELISA. The pDong1/Fab-CGRP was modified to obtain pDong1/OS-CGRP, with which the co-expression solution containing phage-displayed heavy chain variable fragments (phage-VH) and light chain was obtained. CGRP was detected by OS-ELISA based on phage-VH, antibody light chain, and anti-light chain antibody. The VL gene was cloned into the pMAL vector to obtain pMAL-VL (CGRP), with which maltose binding protein fused with VL (MBP-VL) was prepared. CGRP was detected by OS-ELISA employing MBP-VL and phage-VH. Results: OS-ELISAs that measure the CGRP concentration by quantifying the interaction between variable regions were investigated. OS-ELISA using phage-VH and secreted light chains in the same culture system exhibited a limit of detection (LOD) of 0.05 nM, offering higher sensitivity than competitive assay with an LOD of 0.75 nM, whereas using phage-VH and separately prepared MBP-VL exhibited an LOD of 0.15 nM and a broader detection range of 0.15-500 nM than competitive ELISA, whose detection range was 0.75-10 nM. Discussion: The combination of the two OS assays achieved high sensitivity and a broad detection range for CGRP, which may have significance in clinical applications.
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Affiliation(s)
- Yueqing Cheng
- School of Life Science and Technology, Shandong Second Medical University, Weifang, China
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Yujie Gao
- School of Life Science and Technology, Shandong Second Medical University, Weifang, China
| | - Shengshuo Zhang
- School of Life Science and Technology, Shandong Second Medical University, Weifang, China
| | - Yujie Zou
- School of Life Science and Technology, Shandong Second Medical University, Weifang, China
| | - Guangwei Zhao
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, China
- School of Basic Medical Sciences, Shandong University, Jinan, China
| | - Liyuan Zheng
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, China
| | - Binghui Hou
- Department of Neurology, the Affiliated Hospital of Qingdao University, Qingdao, China
| | - Mei Li
- School of Life Science and Technology, Shandong Second Medical University, Weifang, China
| | - Jinhua Dong
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, China
- International Research Frontiers Initiative, Tokyo Institute of Technology, Yokohama, Japan
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2
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Liang YF, Yang JY, Shen YD, Xu ZL, Wang H. A breakthrough of immunoassay format for hapten: recent insights into noncompetitive immunoassays to detect small molecules. Crit Rev Food Sci Nutr 2024:1-11. [PMID: 38356229 DOI: 10.1080/10408398.2024.2315473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Immunoassay based on the antibodies specific for targets has advantages of high sensitivity, simplicity and low cost, therefore it has received more attention in recent years, especially for the rapid detection of small molecule chemicals present in foods, diagnostics and environments. However, limited by low molecular weight and only one antigenic determinant existed, immunoassays for these small molecule chemicals, namely hapten substances, were commonly performed in a competitive immunoassay format, whose sensitivities were obviously lower than the sandwich enzyme-linked immunosorbent assay generally adaptable for the protein targets. In order to break through the bottleneck of detection format, researchers have designed and established several novel noncompetitive immunoassays for the haptens in the past few years. In this review, we focused on the four representative types of noncompetitive immunoassay formats and described their characteristics and applications in rapid detection of small molecules. Meanwhile, a systematic discussion on the current technologies challenges and the possible solutions were also summarized. This review aims to provide an updated overview of the current state-of-the-art in noncompetitive immunoassay for small molecules, and inspire the development of novel designs for small molecule detection.
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Affiliation(s)
- Yi-Fan Liang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Jin-Yi Yang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Yu-Dong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Zhen-Lin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou, Guangdong, China
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3
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Harmsen MM, Ackerschott B, de Smit H. Serum immunoglobulin or albumin binding single-domain antibodies that enable tailored half-life extension of biologics in multiple animal species. Front Immunol 2024; 15:1346328. [PMID: 38352869 PMCID: PMC10862077 DOI: 10.3389/fimmu.2024.1346328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/12/2024] [Indexed: 02/16/2024] Open
Abstract
Single-domain antibody fragments (sdAbs) can be isolated from heavy-chain-only antibodies that occur in camelids or the heavy chain of conventional antibodies, that also occur in camelids. Therapeutic application of sdAbs is often complicated by their low serum half-life. Fusion to sdAb that bind to long-lived serum proteins albumin or IgG can prolong serum half-life of fusion partners. Such studies mostly focused on human application. For half-life prolongation in multiple animal species novel species cross-reacting sdAb are needed. We here describe the isolation from immunized llamas of sdAbs G6 and G13 that bound IgG of 9-10 species analysed, including horse, dog, cat, and swine, as well as sdAb A12 that bound horse, dog, swine and cat albumin. A12 bound albumin with 13 to 271 nM affinity dependent on the species. G13 affinity was difficult to determine by biolayer interferometry due to low and heterogeneous signals. G13 and G6 compete for the same binding domain on Fab fragments. Furthermore, they both lack the hallmark residues typical of camelid sdAbs derived from heavy-chain antibodies and had sequence characteristics typical of human sdAbs with high solubility and stability. This suggests they are derived from conventional llama antibodies. They most likely bind IgG through pairing with VL domains at the VH-VL interface rather than a paratope involving complementarity determining regions. None of the isolated sdAb interfered with FcRn binding to albumin or IgG, and thus do not prevent endosomal albumin/IgG-sdAb complex recycling. Fusions of albumin-binding sdAb A12 to several tetanus neurotoxin (TeNT) binding sdAbs prolonged the terminal serum half-life in piglets to about 4 days, comparable to authentic swine albumin. However, G13 conferred a much lower half-life of 0.84 days. Similarly, in horse, G13 prolonged half-life to only 1.2 days whereas A12 fused to two TeNT binding domains (T6T16A12) had a half-life of 21 days. The high half-life of T6T16A12, which earlier proved to be a highly potent TeNT antitoxin, further supports its therapeutic value. Furthermore, we have identified several additional sdAbs that enable tailored half-life extension of biologicals in multiple animal species.
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Affiliation(s)
- Michiel M. Harmsen
- Wageningen Bioveterinary Research, Wageningen University & Research, Lelystad, Netherlands
| | | | - Hans de Smit
- Research and Development, Smivet B.V., Wijchen, Netherlands
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4
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Komatsu S, Ohno H, Saito H. Target-dependent RNA polymerase as universal platform for gene expression control in response to intracellular molecules. Nat Commun 2023; 14:7256. [PMID: 37978180 PMCID: PMC10656481 DOI: 10.1038/s41467-023-42802-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/23/2023] [Indexed: 11/19/2023] Open
Abstract
Controlling gene expression in response to specific molecules is an essential technique for regulating cellular functions. However, current platforms with transcription and translation regulators have a limited number of detectable molecules to induce gene expression. Here to address these issues, we present a Target-dependent RNA polymerase (TdRNAP) that can induce RNA transcription in response to the intracellular target specifically recognized by single antibody. By substituting the fused antibody, we demonstrate that TdRNAPs respond to a wide variety of molecules, including peptides, proteins, RNA, and small molecules, and produce desired transcripts in human cells. Furthermore, we show that multiple TdRNAPs can construct orthogonal and multilayer genetic circuits. Finally, we apply TdRNAP to achieve cell-specific genome editing that is autonomously triggered by detecting the target gene product. TdRNAP can expand the molecular variety for controlling gene expression and provide the genetic toolbox for bioengineering and future therapeutic applications.
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Affiliation(s)
- Shodai Komatsu
- Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
- Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hirohisa Ohno
- Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Hirohide Saito
- Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan.
- Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan.
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5
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Fei J, Jiang J, Bai Y, Wu W, Zhao X, Yu W, Wen K, Yu X, Shen J, Wang Z. A Proof-of-Concept Sandwich Enzyme-Linked Immunoassay Development for Small Molecules. Anal Chem 2023; 95:14665-14674. [PMID: 37679861 DOI: 10.1021/acs.analchem.3c02557] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A sandwich immunoassay theoretically exhibits higher sensitivity and specificity compared to a competitive counterpart; however, it is extremely difficult to obtain a pair of antibodies that can bind to a small molecule simultaneously, which is always thought to be a single epitope. In the present study, abamectin (ABM) was selected to prove the effect of hapten design and antibody recognition properties on the development of a sandwich immunoassay for small molecules. First, the epitopes of ABM were roughly located, and epitope distances were determined. Then, two haptens were designed by introducing spacer arms at the C4″-OH and C5-OH of ABM, respectively, aiming to provide the longest epitope distances. A total of seven rabbit polyclonal antibodies (pAbs) and 21 mouse monoclonal antibodies (mAbs) with various recognition properties were obtained. Extensive combinatorial associations of antibody pairs for simultaneously binding to ABM were performed, and only two mAb-mAb pairs were observed to achieve a sandwich immunoassay for ABM with a total success rate of 0.27%. The best mAb pair for sandwich immunoassay was confirmed by surface plasmon resonance, used to develop a sandwich immunoassay, and then evaluated by cross-reactivities and molecular docking with structurally similar analogues and abamectin. Altogether, the study provided a theoretical foundation as well as practical experience and demonstrated the importance of careful hapten design and extensive antibody screening to successfully establish the sandwich immunoassay for small molecules.
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Affiliation(s)
- Jie Fei
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Jiaqun Jiang
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Yuchen Bai
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Weilin Wu
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Xiangjun Zhao
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Wenbo Yu
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Kai Wen
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Xuezhi Yu
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Jianzhong Shen
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
| | - Zhanhui Wang
- National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, 100193 Beijing, People's Republic of China
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6
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Schneider MM, Scheidt T, Priddey AJ, Xu CK, Hu M, Meisl G, Devenish SRA, Dobson CM, Kosmoliaptsis V, Knowles TPJ. Microfluidic antibody affinity profiling of alloantibody-HLA interactions in human serum. Biosens Bioelectron 2023; 228:115196. [PMID: 36921387 DOI: 10.1016/j.bios.2023.115196] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 02/17/2023] [Accepted: 03/03/2023] [Indexed: 03/07/2023]
Abstract
Antibody profiling is a fundamental component of understanding the humoral response in a wide range of disease areas. Most currently used approaches operate by capturing antibodies onto functionalised surfaces. Such measurements of surface binding are governed by an overall antibody titre, while the two fundamental molecular parameters, antibody affinity and antibody concentration, are challenging to determine individually from such approaches. Here, by applying microfluidic diffusional sizing (MDS), we show how we can overcome this challenge and demonstrate reliable quantification of alloantibody binding affinity and concentration of alloantibodies binding to Human Leukocyte Antigens (HLA), an extensively used clinical biomarker in organ transplantation, both in buffer and in crude human serum. Capitalising on the ability to vary both serum and HLA concentrations during MDS, we show that both affinity and concentration of HLA-specific antibodies can be determined directly in serum when neither of these parameters is known. Finally, we provide proof of principle in clinical transplant patient sera that our assay enables differentiation of alloantibody reactivity against HLA proteins of highly similar structure, providing information not attainable through currently available techniques. These results outline a path towards detection and in-depth profiling of humoral immunity and may enable further insights into the clinical relevance of antibody reactivity in clinical transplantation and beyond.
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Affiliation(s)
- Matthias M Schneider
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Tom Scheidt
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Ashley J Priddey
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK
| | - Catherine K Xu
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Mengsha Hu
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Georg Meisl
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Sean R A Devenish
- Fluidic Analytics, Unit A, The Paddocks Business Centre, Cherry Hinton Rd, Cambridge, CB1 8DH, UK
| | - Christopher M Dobson
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
| | - Vasilis Kosmoliaptsis
- Department of Surgery, University of Cambridge, Addenbrooke's Hospital, Hills Road, Cambridge, CB2 0QQ, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, University of Cambridge, Hills Road, Cambridge, CB2 0QQ, UK; NIHR Cambridge Biomedical Research Centre, Hills Road, Cambridge, CB2 0QQ, UK.
| | - Tuomas P J Knowles
- Centre for Misfolding Diseases, Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK; Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Ave, Cambridge, CB3 0HE, UK.
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7
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Rani AQ, Zhu B, Ueda H, Kitaguchi T. Recent progress in homogeneous immunosensors based on fluorescence or bioluminescence using antibody engineering. Analyst 2023; 148:1422-1429. [PMID: 36916979 DOI: 10.1039/d2an01913b] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Homogeneous immunosensors integrate the advantages of both biosensors and immunoassays; they include speed, high sensitivity, and accuracy. They have been developed rapidly in the past few years and offer a cost-effective alternative technology with rapidity, sensitivity, and user-friendliness, which has been applied in a wide variety of applications. This review introduces the current directions of immunosensor development, focusing on fluorescent and bioluminescent immunosensors and highlighting the advantages, improvements, and key approaches to overcome the limitations of each.
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Affiliation(s)
- Abdul Qawee Rani
- Moon Creative Lab Inc., 3-10-5 Kitaaoyama, Minato-ku, Tokyo 107-0061, Japan
| | - Bo Zhu
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.
| | - Tetsuya Kitaguchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan.
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8
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Zhu B, Qian C, Tang H, Kitaguchi T, Ueda H. Creating a Thermostable β-Glucuronidase Switch for Homogeneous Immunoassay by Disruption of Conserved Salt Bridges at Diagonal Interfaces. Biochemistry 2023; 62:309-317. [PMID: 35849118 DOI: 10.1021/acs.biochem.2c00165] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Escherichia coli β-glucuronidase (GUS) has been used as a reporter enzyme in molecular biology and engineered as an enzyme switch for the development of homogeneous biosensors. In this study, we developed a thermostable GUS enzyme switch based on the thermostable GUS mutant TR3337 by disrupting a conserved salt bridge (H514-E523) between the diagonal subunits of its homotetramer. A combinatorial library (240 variants) was screened using a novel high-throughput strategy, which led to the identification of mutant DLW (H514D/M516L/Y517W) as a functional enzyme switch in a caffeine-recognizing immunosensor. Molecular dynamics simulations were performed to predict the topology change around position 514, and a side-chain flip of D514 (repulsion with E523) was observed in the DLW mutant. Up to 1.8-fold of signal-to-background ratio was confirmed when measured at up to 45 °C, thereby highlighting the DLW mutant as a versatile tool for developing thermostable immunosensors for in vitro and in cellulo applications.
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Affiliation(s)
- Bo Zhu
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Cheng Qian
- Graduate School of Life Science and Technology, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Haoxuan Tang
- Graduate School of Life Science and Technology, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Tetsuya Kitaguchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
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Su J, Zhu B, Inoue A, Oyama H, Morita I, Dong J, Yasuda T, Sugita-Konishi Y, Kitaguchi T, Kobayashi N, Miyake S, Ueda H. The Patrol Yeast: A new biosensor armed with antibody-receptor chimera detecting a range of toxic substances associated with food poisoning. Biosens Bioelectron 2023; 219:114793. [PMID: 36265251 DOI: 10.1016/j.bios.2022.114793] [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: 07/28/2022] [Revised: 10/03/2022] [Accepted: 10/06/2022] [Indexed: 11/19/2022]
Abstract
Baker's yeast is an attractive host with established safety and stability characteristics. Many yeast-based biosensors have been developed, but transmembrane signal transduction has not been used to detect membrane-impermeable substances using antigen-antibody interactions. Therefore, we created Patrol Yeast, a novel yeast-based immunosensor of various targets, particularly toxic substances in food. A membrane-based yeast two-hybrid system using split-ubiquitin was successfully used to detect practically important concentration ranges of caffeine and aflatoxins using separated variable regions of an antibody. Moreover, enterohemorrhagic Escherichia coli O157 was detected using a specific single-chain antibody, in which Zymolyase was added to partially destroy the cell wall. The incorporation of secreted Cypridina luciferase reporter further simplified the signal detection procedures without cell lysis. The methodology is more cost-effective and faster than using mammalian cells. The ability to detect various targets renders Patrol Yeast a valuable tool for ensuring food and beverage safety and addressing other environmental and technological issues.
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Affiliation(s)
- Jiulong Su
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Bo Zhu
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Akihito Inoue
- Graduate School of Life Science and Technology, Tokyo Institute of Technology, Yokohama, Japan
| | | | | | - Jinhua Dong
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan; World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Takanobu Yasuda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | | | - Tetsuya Kitaguchi
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | | | - Shiro Miyake
- School of Life and Environmental Science, Azabu University, Sagamihara, Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan; World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.
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Shestopal SA, Parunov LA, Olivares P, Chun H, Ovanesov MV, Pettersson JR, Sarafanov AG. Isolated Variable Domains of an Antibody Can Assemble on Blood Coagulation Factor VIII into a Functional Fv-like Complex. Int J Mol Sci 2022; 23:ijms23158134. [PMID: 35897712 PMCID: PMC9330781 DOI: 10.3390/ijms23158134] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/19/2022] [Accepted: 07/21/2022] [Indexed: 11/29/2022] Open
Abstract
Single-chain variable fragments (scFv) are antigen-recognizing variable fragments of antibodies (FV) where both subunits (VL and VH) are connected via an artificial linker. One particular scFv, iKM33, directed against blood coagulation factor VIII (FVIII) was shown to inhibit major FVIII functions and is useful in FVIII research. We aimed to investigate the properties of iKM33 enabled with protease-dependent disintegration. Three variants of iKM33 bearing thrombin cleavage sites within the linker were expressed using a baculovirus system and purified by two-step chromatography. All proteins retained strong binding to FVIII by surface plasmon resonance, and upon thrombin cleavage, dissociated into VL and VH as shown by size-exclusion chromatography. However, in FVIII activity and low-density lipoprotein receptor-related protein 1 binding assays, the thrombin-cleaved iKM33 variants were still inhibitory. In a pull-down assay using an FVIII-affinity sorbent, the isolated VH, a mixture of VL and VH, and intact iKM33 were carried over via FVIII analyzed by electrophoresis. We concluded that the isolated VL and VH assembled into scFv-like heterodimer on FVIII, and the isolated VH alone also bound FVIII. We discuss the potential use of both protease-cleavable scFvs and isolated Fv subunits retaining high affinity to the antigens in various practical applications such as therapeutics, diagnostics, and research.
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11
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Sakamoto S, Uchiyama H, Yusakul G, Kyokong N, Pongkitwitoon B, Putalun W, Tanaka H, Morimoto S. Open sandwich fluorescence-linked immunosorbent assay for detection of soy isoflavone glycosides. Food Chem 2021; 361:129829. [PMID: 34087571 DOI: 10.1016/j.foodchem.2021.129829] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 03/12/2021] [Accepted: 04/11/2021] [Indexed: 10/21/2022]
Abstract
To detect major soy isoflavone glycosides, namely daidzin (DZ) and genistin (GEN), novel open sandwich fluorescence-linked immunosorbent assay (os-FLISA) was developed by taking advantage of enhanced interactions between variable regions of heavy (VH) and light chain (VL) domains in the presence of an antigen. The VH and VL genes were expressed in Escherichia coli as a chimera protein with green fluorescence protein (AcGFP1) and maltose-binding protein (MBP), respectively. Comprehensive characterization of os-FLISA displayed nearly the same specificity as parental DZ- and GEN-specific monoclonal antibody, demonstrating the potential of the developed assay for detection of both DZ and GEN. Their detectable range in this system exhibited at 0.1-12.5 μg mL-1. Subsequent validation analysis revealed that os-FLISA was reliable and accurate system for detection of total soy isoflavone glycosides. Notably, this is the first FLISA based on an open sandwich system, which can be employed for the detection of small molecules.
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Affiliation(s)
- Seiichi Sakamoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Hiroki Uchiyama
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Gorawit Yusakul
- School of Pharmacy, Walailak University, Nakhon Si Thammarat 80160, Thailand
| | - Napat Kyokong
- Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10330, Thailand
| | | | - Waraporn Putalun
- Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Hiroyuki Tanaka
- Faculty of Pharmaceutical Sciences, Sanyo-Onoda City University, 1-1-1 Daigaku-dori, Sanyo-Onoda City, 756-0884 Yamaguchi, Japan
| | - Satoshi Morimoto
- Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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12
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Zhao G, Li H, Li B, Li M, Xu W, Chen L, Wang B, Dong J. Rapid conversion of IgG to biosensor using an antibody-binding protein-based probe. Analyst 2021; 146:6114-6118. [PMID: 34636369 DOI: 10.1039/d1an01171e] [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
We successfully developed a fluorescent probe that can quickly convert full-length antibodies to Quenchbodies, which represent a type of fluorescent immunosensor with high binding affinity and specificity depending on the reaction of antigens and antibodies. An anti-testosterone IgG was successfully converted to an immunosensor that detects testosterone with a limit of detection (LOD) of 0.76 nM and concentration for 50% of maximal effect (EC50) of 61.5 nM. Another IgG-based immunosensor detected ractopamine with an LOD of 15.5 pM and EC50 of 48.6 nM.
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Affiliation(s)
- Guangwei Zhao
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Haimei Li
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Baowei Li
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Mei Li
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Wei Xu
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Limei Chen
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China.
| | - Baoqiang Wang
- Department of Clinical Laboratory, Affiliated Hospital of Weifang Medical University, Weifang, 261031, China
| | - Jinhua Dong
- Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China. .,World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
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13
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14
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Park HJ, Kim Y, Yoo TH. One-pot colorimetric detection of molecules based on proximity proteolysis reaction. Biosens Bioelectron 2021; 188:113349. [PMID: 34030090 DOI: 10.1016/j.bios.2021.113349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/10/2021] [Accepted: 05/12/2021] [Indexed: 01/06/2023]
Abstract
Various types of molecules serve as biomarkers of diseases, and numerous methods have been reported to detect and quantify them. Recently, research efforts have been made to develop point-of-care (POC) tests, which contribute to early diagnoses of diseases, particularly in resource-limited settings. An assay performed in a homogeneous phase is an obvious route to develop these methods. Here, simple homogeneous methods based on proximity proteolysis reactions (PPR) are reported to detect biological molecules. A typical PPR system has been designed such that the proteolysis reaction between protease and zymogen is enhanced in the presence of a target analyte. The activated zymogen generates a color signal by hydrolyzing a chromophore. A protease and zymogen are linked to target binders using specific hybridization between complementary single-stranded DNAs, and several molecules, including proteins, antibodies, aptamers, and small molecules, are used as target binders. The developed assay methods successfully detected several kinds of analytes at subnanomolar concentrations with the one-step procedure and color signal. The modular design of the PPR-based assay will enable the development of simple POC diagnostics for various biomarkers.
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Affiliation(s)
- Hyeon Ji Park
- Department of Molecular Science and Technology, Ajou University, 206 World Cup-ro, Yengtong-gu, Suwon, 16499, South Korea
| | - Yuseon Kim
- Department of Molecular Science and Technology, Ajou University, 206 World Cup-ro, Yengtong-gu, Suwon, 16499, South Korea
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, 206 World Cup-ro, Yengtong-gu, Suwon, 16499, South Korea; Department of Applied Chemistry and Biological Engineering, Ajou University, 206 World Cup-ro, Yengtong-gu, Suwon, 16499, South Korea.
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15
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Liang Y, Wang Y, Wang F, Li J, Wang C, Dong J, Ueda H, Xiao Z, Shen Y, Xu Z, Wang H. An enhanced open sandwich immunoassay by molecular evolution for noncompetitive detection of Alternaria mycotoxin tenuazonic acid. Food Chem 2021; 361:130103. [PMID: 34082388 DOI: 10.1016/j.foodchem.2021.130103] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 05/10/2021] [Accepted: 05/11/2021] [Indexed: 10/21/2022]
Abstract
Open sandwich enzyme-linked immunosorbent assay (OS-ELISA), a novel noncompetitive immunoassay format, has shown great potential in rapid detection for small molecules compared with traditional competitive format. Here, an enhanced OS-ELISA towards the mycotoxin tenuazonic acid (TeA) was developed for the first time based on heavy chain variable region (VH) and light chain variable region (VL) from the hybridoma cells (3F10) producing anti-TeA monoclonal antibody (mAb). The established OS-ELISA exhibited a limit of detection of 0.08 ng/mL, and was 13 times more sensitive than mAb-based indirect competitive ELISA (ic-ELISA). The proposed assay was also applied to detect TeA contents in juice, flour and tomato ketchup samples with satisfactory recoveries of 87.6%-111.3%. Finally, the great accuracy of the established OS-ELISA method was validated by the standard ultra-performance liquid chromatography/tandem mass spectrometry (UPLC-MS/MS).
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Affiliation(s)
- Yifan Liang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Yu Wang
- Guangzhou Institute of Food Inspection, Guangzhou 510080, China
| | - Feng Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Jiadong Li
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Chenglong Wang
- Guangzhou Institute of Food Inspection, Guangzhou 510080, China
| | - Jinhua Dong
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang 261053, China
| | - Hiroshi Ueda
- World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Zhili Xiao
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Yudong Shen
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China
| | - Zhenlin Xu
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
| | - Hong Wang
- Guangdong Provincial Key Laboratory of Food Quality and Safety, College of Food Science, South China Agricultural University, Guangzhou 510642, China.
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16
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Zhang L, Cong Y, Li H, Chen L, Li B, Huang JX, Dong J. Construction of a full-length antibody phage display vector. J Immunol Methods 2021; 494:113052. [PMID: 33838171 DOI: 10.1016/j.jim.2021.113052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 03/25/2021] [Accepted: 04/03/2021] [Indexed: 10/21/2022]
Abstract
Antibody phage display technology plays an important role in the development of monoclonal antibodies, humanization, and affinity evolution of antibodies. Thus far, antibody phage display mainly focuses on the display of antibody variable region or antigen-binding fragments. In this study, we constructed a new phage display system that can display full-length IgG antibodies on M13 phage. The phage display vector contains open reading frames (ORFs) encoding full-length the heavy and light chains of the antibody. NcoI/XhoI restriction enzyme sites were used to clone the variable region of the heavy chain into the heavy chain ORF, and SalI/NotI sites were used to clone the light chain variable region. SnaBI and SbfI restriction enzyme sites were designed between the cloning sites of heavy and light chains, respectively, to increase the cloning efficiency. The full-length antibodies of nivolumab against programmed death factor 1, trastuzumab against human epidermal growth factor 2, diL2K against the cluster of differentiation 3 epsilon, and adalimumab against tumor necrosis factor- alpha were displayed on phage with the vector. Phage-displayed antibodies showed their original antigen-binding activity. An amber codon shifted the vector to express IgG in non-suppressed Escherichia coli. The heavy and light chains of the E. coli-expressed antibodies could be detected through western blotting, and the antigen-binding activity was confirmed using an enzyme-linked immunosorbent assay. Biopanning was carried out with a model phage display antibody library, and the results showed that the novel phage system could be used for antibody library construction and highly efficient antibody screening. The reported system is the first full-length antibody phage display system.
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Affiliation(s)
- Liqian Zhang
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Yang Cong
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Haimei Li
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Limei Chen
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Baowei Li
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Johnny X Huang
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Jinhua Dong
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China; World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
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17
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Chen L, Tan R, Zhou Y, Zhang L, Zhang S, Li X, Cong Y, Li H, Sun P, Ueda H, Dong J. Development of an Open sandwich ELISA for the detection of microcystin-LR. Microchem J 2020. [DOI: 10.1016/j.microc.2020.105325] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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18
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Dong J, Miyake C, Yasuda T, Oyama H, Morita I, Tsukahara T, Takahashi M, Jeong HJ, Kitaguchi T, Kobayashi N, Ueda H. PM Q-probe: A fluorescent binding protein that converts many antibodies to a fluorescent biosensor. Biosens Bioelectron 2020; 165:112425. [DOI: 10.1016/j.bios.2020.112425] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/22/2020] [Accepted: 07/02/2020] [Indexed: 12/14/2022]
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19
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Chen WL, Chuang HS. Trace Biomolecule Detection with Functionalized Janus Particles by Rotational Diffusion. Anal Chem 2020; 92:12996-13003. [PMID: 32933244 DOI: 10.1021/acs.analchem.0c01733] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cytokines are small proteins secreted by cells in innate and adaptive immune systems. Abnormal cytokine secretion is often regarded as an early cue of dysregulation of homeostasis due to diseases or infections. Early detection allows early medical intervention. In this study, a natural phenomenon called rotational Brownian motion was characterized by Janus particles and its potential use in detection of trace biomolecules explored. Through the functionalization of the Janus particles with an antibody, the target cytokine, that is, tumor necrosis factor-α, was measured in terms of rotational diffusion. Rotational diffusion is highly sensitive to the particle volume change according to the Stokes-Einstein-Debye relation and can be quantified by blinking signal. Accordingly, 1 μm half-gold and half-fluorescent microbeads were conjugated with 200 nm nanobeads through sandwiched immunocomplexes. The light source, lead time for stabilization, and purification were investigated for optimization. Particle images can be captured with green light at 5 Hz within 300 s. Under such conditions, the functionalized Janus particles eventually achieved a limit of detection of 1 pg/mL. The rotational diffusometry realized by Janus particles was power-free and feasible for ultrasensitive detection, such as early disease detection.
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Affiliation(s)
- Wei-Long Chen
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan
| | - Han-Sheng Chuang
- Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.,Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan 701, Taiwan
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20
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Application of phage-display developed antibody and antigen substitutes in immunoassays for small molecule contaminants analysis: A mini-review. Food Chem 2020; 339:128084. [PMID: 33152875 DOI: 10.1016/j.foodchem.2020.128084] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/06/2020] [Accepted: 09/11/2020] [Indexed: 12/19/2022]
Abstract
Toxic small molecule contaminants (SMCs) residues in food threaten human health. Immunoassays are popular and simple techniques for SMCs analysis. However, immunoassays based on polyclonal antibodies, monoclonal antibodies and chemosynthetic antigens have some defects, such as complicated preparation of antibodies, risk of toxic haptens using for antigen chemosynthesis and so on. Phage-display technique has been proven to be an attractive alternative approach to producing antibody and antigen substitutes of SMCs, and opened up new realms for developing immunoassays of SMCs. These substitutes contain five types, including anti-idiotypic recombinant antibody (AIdA), anti-immune complex peptide (AIcP), anti-immune complex recombinant antibody (AIcA) and anti-SMC recombinant antibody (anti-SMC RAb). In this review, the principle of immunoassays based on the five types of substitutes, as well as their application and advantages are summarized and discussed.
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21
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DNA Microsystems for Biodiagnosis. MICROMACHINES 2020; 11:mi11040445. [PMID: 32340280 PMCID: PMC7231314 DOI: 10.3390/mi11040445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 04/21/2020] [Accepted: 04/22/2020] [Indexed: 12/16/2022]
Abstract
Researchers are continuously making progress towards diagnosis and treatment of numerous diseases. However, there are still major issues that are presenting many challenges for current medical diagnosis. On the other hand, DNA nanotechnology has evolved significantly over the last three decades and is highly interdisciplinary. With many potential technologies derived from the field, it is natural to begin exploring and incorporating its knowledge to develop DNA microsystems for biodiagnosis in order to help address current obstacles, such as disease detection and drug resistance. Here, current challenges in disease detection are presented along with standard methods for diagnosis. Then, a brief overview of DNA nanotechnology is introduced along with its main attractive features for constructing biodiagnostic microsystems. Lastly, suggested DNA-based microsystems are discussed through proof-of-concept demonstrations with improvement strategies for standard diagnostic approaches.
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22
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Kanai Y, Ohmuro-Matsuyama Y, Tanioku M, Ushiba S, Ono T, Inoue K, Kitaguchi T, Kimura M, Ueda H, Matsumoto K. Graphene Field Effect Transistor-Based Immunosensor for Ultrasensitive Noncompetitive Detection of Small Antigens. ACS Sens 2020; 5:24-28. [PMID: 31922395 DOI: 10.1021/acssensors.9b02137] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Due to its high carrier mobility, graphene is considered a suitable material for use in field-effect transistors. However, its application to immunosensing of small molecules is still elusive. To investigate the potential of graphene field effect transistors (G-FET) as a sensor for small molecules with small or no charge, we applied the open-sandwich immunoassay (OS-IA), which detects low-molecular-weight antigens noncompetitively, to G-FET. Using an antibody variable fragment VL immobilized on graphene and a hyperacidic region of amyloid precursor protein fused to the other variable fragment VH, we successfully detected a small antigen peptide consisting of 7 amino acids (BGP-C7), with a more than 100-fold increase in sensitivity compared with that measured by enzyme-linked OS-IA. Furthermore, we succeeded in detecting BGP-C7 in the presence of human serum with similar sensitivity, suggesting its potential application in clinical diagnostics.
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Affiliation(s)
- Yasushi Kanai
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Yuki Ohmuro-Matsuyama
- Laboratory for Chemistry and Life Sciences, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho, Yokohama, Kanagawa 226-8503, Japan
| | - Masami Tanioku
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Shota Ushiba
- Murata Manufacturing Co. Ltd., Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Takao Ono
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Koichi Inoue
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuya Kitaguchi
- Laboratory for Chemistry and Life Sciences, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho, Yokohama, Kanagawa 226-8503, Japan
| | - Masahiko Kimura
- Murata Manufacturing Co. Ltd., Higashikotari, Nagaokakyo-shi, Kyoto 617-8555, Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Sciences, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta-cho, Yokohama, Kanagawa 226-8503, Japan
| | - Kazuhiko Matsumoto
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan
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23
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Zhang Y, Hess H. Inhibitors in Commercially Available 2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonate) Affect Enzymatic Assays. Anal Chem 2019; 92:1502-1510. [DOI: 10.1021/acs.analchem.9b04751] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yifei Zhang
- Department of Biomedical Engineering, Columbia University, 351L Engineering Terrace, 1210 Amsterdam Avenue, New York, New York 10027, United States
| | - Henry Hess
- Department of Biomedical Engineering, Columbia University, 351L Engineering Terrace, 1210 Amsterdam Avenue, New York, New York 10027, United States
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24
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Creation of stable and strictly regulated enzyme switch for signal-on immunodetection of various small antigens. J Biosci Bioeng 2019; 128:677-682. [DOI: 10.1016/j.jbiosc.2019.05.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/15/2019] [Accepted: 05/27/2019] [Indexed: 12/11/2022]
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25
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Banaszek A, Bumm TGP, Nowotny B, Geis M, Jacob K, Wölfl M, Trebing J, Kucka K, Kouhestani D, Gogishvili T, Krenz B, Lutz J, Rasche L, Hönemann D, Neuweiler H, Heiby JC, Bargou RC, Wajant H, Einsele H, Riethmüller G, Stuhler G. On-target restoration of a split T cell-engaging antibody for precision immunotherapy. Nat Commun 2019; 10:5387. [PMID: 31772172 PMCID: PMC6879491 DOI: 10.1038/s41467-019-13196-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 10/02/2019] [Indexed: 12/19/2022] Open
Abstract
T cell-engaging immunotherapies are changing the landscape of current cancer care. However, suitable target antigens are scarce, restricting these strategies to very few tumor types. Here, we report on a T cell-engaging antibody derivative that comes in two complementary halves and addresses antigen combinations instead of single molecules. Each half, now coined hemibody, contains an antigen-specific single-chain variable fragment (scFv) fused to either the variable light (VL) or variable heavy (VH) chain domain of an anti-CD3 antibody. When the two hemibodies simultaneously bind their respective antigens on a single cell, they align and reconstitute the original CD3-binding site to engage T cells. Employing preclinical models for aggressive leukemia and breast cancer, we show that by the combinatorial nature of this approach, T lymphocytes exclusively eliminate dual antigen-positive cells while sparing single positive bystanders. This allows for precision targeting of cancers not amenable to current immunotherapies. The restriction of appropriate tumour-specific antigens is a current limitation for T cell-engaging immunotherapy. Here, the authors have designed a new system constituted by two halve antibodies, which engage T cells once binding to two different antigens, to specifically eliminate double positive cells in preclinical leukemia and breast cancer mouse models.
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Affiliation(s)
- Agnes Banaszek
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Thomas G P Bumm
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Boris Nowotny
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Maria Geis
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Kim Jacob
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Matthias Wölfl
- University Clinic Würzburg, Children's Hospital, Pediatric Oncology, Hematology and Stem Cell Transplantation, Würzburg, Germany
| | - Johannes Trebing
- University Clinic Würzburg, Department of Internal Medicine II, Division of Molecular Internal Medicine, Würzburg, Germany
| | - Kirstin Kucka
- University Clinic Würzburg, Department of Internal Medicine II, Division of Molecular Internal Medicine, Würzburg, Germany
| | - Dina Kouhestani
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Tea Gogishvili
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Bastian Krenz
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Justina Lutz
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Leo Rasche
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Dirk Hönemann
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Hannes Neuweiler
- Department of Biotechnology and Biophysics, University Würzburg, Würzburg, Germany
| | - Julia C Heiby
- Department of Biotechnology and Biophysics, University Würzburg, Würzburg, Germany
| | - Ralf C Bargou
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany.,Comprehensive Cancer Center Mainfranken, Universitätsklinikum, Würzburg, Germany
| | - Harald Wajant
- University Clinic Würzburg, Department of Internal Medicine II, Division of Molecular Internal Medicine, Würzburg, Germany
| | - Hermann Einsele
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany
| | - Gert Riethmüller
- Ludwig-Maximilians-University, Institute for Immunology, Munich, Germany
| | - Gernot Stuhler
- University Clinic Würzburg, Department of Internal Medicine II, Hematology and Oncology, Würzburg, Germany.
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26
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Cong Y, Dong H, Wei X, Zhang L, Bai J, Wu J, Huang JX, Gao Z, Ueda H, Dong J. A novel murine antibody and an open sandwich immunoassay for the detection of clenbuterol. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 182:109473. [PMID: 31398783 DOI: 10.1016/j.ecoenv.2019.109473] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/29/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
Clenbuterol (CLEN) is a sympathomimetic amine used as a decongestant and bronchodilator while treating breathing disorders. It is also used in food-producing animals as it improves the rate of red meat production. However, it is prohibited in many countries nowadays due to human health and safety concerns. Unfortunately, the illegal use of CLEN is still rampant. Thus, monitoring it in food and livestock is important. Here, we report a novel murine antibody and an open sandwich enzyme linked immunosorbent assay (OS-ELISA) to detect CLEN based on antigen-antibody reactions. The genes of antibody variable regions in mice immunized with CLEN conjugated with bovine serum albumin were cloned into a phagemid (pDong1/Fab) to construct a phage-display antibody library, from which a novel antibody, A12, was selected. Then, an OS-ELISA was developed to detect CLEN using separated variable regions of the A12 antibody. The limit of detection of the assay was found to be 8 ng/mL, which was useful for monitoring CLEN usage.
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Affiliation(s)
- Yang Cong
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Hang Dong
- School of Basic Medical Sciences, Peking University, Beijing, 100191, China
| | - Xiaoyuan Wei
- School of Life Sciences, Tsinghua University, Beijing, 100000, China
| | - Liqian Zhang
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Jingkun Bai
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Jingliang Wu
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Johnny X Huang
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Zhiqin Gao
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, 226-8503, Japan; World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
| | - Jinhua Dong
- Key Laboratory for Biological Medicine in Shandong Universities, Weifang Key Laboratory for Antibody Medicine, School of Bioscience and Technology, Weifang Medical University, Weifang, 261053, China; World Research Hub Initiative, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
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Nishitani S, Sakata T. Polymeric Nanofilter Biointerface for Potentiometric Small-Biomolecule Recognition. ACS APPLIED MATERIALS & INTERFACES 2019; 11:5561-5569. [PMID: 30644715 DOI: 10.1021/acsami.8b20010] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In this paper, we propose a novel concept of a biointerface, a polymeric nanofilter, for the potentiometric detection of small biomolecules using an extended-Au-gate field-effect transistor (EG-Au-FET). A Au electrode has the potential capability to detect various small biomolecules with ultrasensitivity at nM levels on the basis of a surface redox reaction, but it exhibits no selective response to such biomolecules. Therefore, a suitable polymeric nanofilter is designed and modified on the Au electrode, so that a small target biomolecule reaches the Au surface, resulting in an electrical signal, whereas low-molecular-weight interferences not approaching the Au surface are captured in the polymeric nanofilter. The polymeric nanofilter is composed of two layers. The first layer is electrografted as an anchor layer by a cyclic voltammetry method. Then, a filtering layer is precisely polymerized as the second layer by a photo-mediated surface-initiated atom transfer radical polymerization method. The thickness and density of the polymeric nanofilter are controlled to specifically detect a small target biomolecule with high sensitivity. As a model case, l-cysteine as the small target biomolecule at nM levels is specifically detected by filtering l-DOPA as a low-molecular-weight interference using the polymeric nanofilter-grafted EG-Au-FET on the basis of the following mechanism. The phenylboronic acid (PBA) that copolymerizes with the polymeric nanofilter captures l-DOPA through diol binding, whereas l-cysteine reaches the Au surface through the filter layer. The polymeric nanofilter can also effectively prevent the interaction between biomacromolecules such as albumin and the Au electrode. A platform based on a polymeric nanofilter-grafted EG-Au-FET biosensor is suitable for the ultrasensitive and specific detection of a small biomolecule in biological samples such as tears and sweat, which include small amounts of low-molecular-weight interferences, which generate nonspecific electrical signals.
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Affiliation(s)
- Shoichi Nishitani
- Department of Materials Engineering, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Toshiya Sakata
- Department of Materials Engineering, School of Engineering , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku, Tokyo 113-8656 , Japan
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Michel E, Plückthun A, Zerbe O. Peptide binding affinity redistributes preassembled repeat protein fragments. Biol Chem 2018; 400:395-404. [DOI: 10.1515/hsz-2018-0355] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/21/2018] [Indexed: 01/21/2023]
Abstract
Abstract
Designed armadillo repeat proteins (dArmRPs) are modular peptide binders composed of N- and C-terminal capping repeats Y and A and a variable number of internal modules M that each specifically recognize two amino acids of the target peptide. Complementary fragments of dArmRPs obtained by splitting the protein between helices H1 and H2 of an internal module show conditional and specific assembly only in the presence of a target peptide (Michel, E., Plückthun, A., and Zerbe, O. (2018). Peptide-guided assembly of repeat protein fragments. Angew. Chem. Int. Ed. 57, 4576–4579). Here, we investigate dArmRP fragments that already spontaneously assemble with high affinity, e.g. those obtained from splits between entire modules or between helices H2 and H3. We find that the interaction of the peptide with the assembled fragments induces distal conformational rearrangements that suggest an induced fit on a global protein level. A population analysis of an equimolar mixture of an N-terminal and three C-terminal fragments with various affinities for the target peptide revealed predominant assembly of the weakest peptide binder. However, adding a target peptide to this mixture altered the population of the protein complexes such that the combination with the highest affinity for the peptide increased and becomes predominant when adding excess of peptide, highlighting the feasibility of peptide-induced enrichment of best binders from inter-modular fragment mixtures.
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Affiliation(s)
- Erich Michel
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zürich , Switzerland
| | - Andreas Plückthun
- Department of Biochemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zürich , Switzerland
| | - Oliver Zerbe
- Department of Chemistry , University of Zurich , Winterthurerstrasse 190 , CH-8057 Zürich , Switzerland
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Wang X, Cohen L, Wang J, Walt DR. Competitive Immunoassays for the Detection of Small Molecules Using Single Molecule Arrays. J Am Chem Soc 2018; 140:18132-18139. [PMID: 30495929 DOI: 10.1021/jacs.8b11185] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Small-molecule detection is important for many applications including clinical diagnostics, drug discovery, and measurements of environmental samples and agricultural products. Current techniques for small-molecule detection suffer from various limitations including low analytical sensitivity and complex sample processing. Furthermore, as a result of their small size, small molecules are difficult to detect using an antibody pair in a traditional sandwich assay format. To overcome these limitations, we developed an ultrasensitive competitive immunoassay for small-molecule detection using Single Molecule Arrays (Simoa). We show that the competitive Simoa assay is approximately 50-fold more sensitive than the conventional ELISA. We performed theoretical calculations to determine the factors that influence the sensitivity of competitive Simoa assays and used them to achieve maximal sensitivity. We also demonstrate detection of small molecules in complex biological samples. We show that the competitive Simoa assay is a simple, fast, and highly sensitive approach for ultrasensitive detection of small molecules.
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Affiliation(s)
- Xu Wang
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Limor Cohen
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
| | - Jun Wang
- School of Physical and Mathematical Sciences , Nanjing Tech University , Nanjing , Jiangsu 211816 , China
| | - David R Walt
- Department of Pathology, Brigham and Women's Hospital , Harvard Medical School , Boston , Massachusetts 02115 , United States
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30
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Kajisa T, Sakata T. Molecularly Imprinted Artificial Biointerface for an Enzyme-Free Glucose Transistor. ACS APPLIED MATERIALS & INTERFACES 2018; 10:34983-34990. [PMID: 30234958 DOI: 10.1021/acsami.8b13317] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A platform based on a highly selective and sensitive detection device functionalized with a well-designed artificial biointerface is required for versatile biosensors. We develop a molecularly imprinted polymer (MIP)-coated gate field-effect transistor (FET) biosensor for low-concentration glucose detection in biological fluid samples such as tears in an enzyme-free manner. The MIP includes glucose templates (GluMIP), in which glucose binds to vinylphenylboronic acid in the copolymerized membrane, resulting in the change in the density of molecular charges of the phenylboronic acid (PBA)/glucose complex. The FET biosensor can detect small biomolecules as long as biomolecular recognition events cause intrinsic changes in the density of molecular charges. As a result, the changes in the output voltage detected using the GluMIP-based FET sensor are fitted to the Langmuir adsorption isotherm equation at various concentrations of sugars, showing the low detection limit of 3 μM and the high sensitivity of 115 mV/decade from 100 μM to 4 mM glucose. On the basis of the equation, the stability constant ( Ka) of PBA with glucose is calculated and found to markedly increase to Ka = 1192 M-1, which is higher by a factor of a few hundreds than Ka = 4.6 M-1 obtained by nonelectrical detection methods. Moreover, the GluMIP-coated gate FET sensor shows an approximately 200-fold higher selectivity for glucose than for fructose. This is because glucose binds to PBA more selectively than fructose in the templates, resulting in the generation of negative charges. The electrical properties of the MIP-coated electrode are also evaluated by measuring capacitance. Our work suggests a new strategy of designing a platform based on the MIP-coated gate FET biosensor, which is suitable for a highly selective, sensitive, enzyme-free biosensing system.
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Li Y, Zhang G, Mao X, Yang S, De Ruyck K, Wu Y. High sensitivity immunoassays for small molecule compounds detection – Novel noncompetitive immunoassay designs. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.04.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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32
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Sanada H, Kobayashi K, Oyama K, Maru T, Nakanishi T, Umetsu M, Asano R, Kumagai I. Affinity maturation of humanized anti-epidermal growth factor receptor antibody using a modified phage-based open sandwich selection method. Sci Rep 2018; 8:5414. [PMID: 29615700 PMCID: PMC5882652 DOI: 10.1038/s41598-018-23796-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/21/2018] [Indexed: 11/09/2022] Open
Abstract
Affinity maturation is one of the cardinal strategies for improving antibody function using in vitro evolutionary methods; one such well-established method is phage display. To minimise gene deletion, we previously developed an open sandwich (OS) method wherein selection was performed using only phage-displaying VH fragments after mixing with soluble VL fragments. The decrease in anti-EGFR antibody 528 affinity through humanization was successfully recovered by selecting VH mutants using this OS method. However, the affinity was not similar to that of parental 528. For further affinity maturation, we aimed to isolate VL mutants that act in synergy with VH mutants. However, the OS method could not be applied for selecting VL fragments because the preparation of soluble VH fragments was hampered by their instability and insolubility. Therefore, we initially designed a modified OS method based on domain-swapping of VH fragments, from added soluble Fv fragments to phage-displaying VL fragments. Using this novel Fv-added OS selection method, we successfully isolated VL mutants, and one of the Fv comprising VH and VL mutants showed affinity almost equivalent to that of parental 528. This method is applicable for engineering other VL fragments for affinity maturation.
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Affiliation(s)
- Hideaki Sanada
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Kazuki Kobayashi
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Kenji Oyama
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Takamitsu Maru
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Takeshi Nakanishi
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Mitsuo Umetsu
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Ryutaro Asano
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan. .,Department of Biotechnology and Life Science, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Tokyo, 184-8588, Japan.
| | - Izumi Kumagai
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, Sendai, 980-8579, Japan.
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Ohmuro-Matsuyama Y, Ueda H. Homogeneous Noncompetitive Luminescent Immunodetection of Small Molecules by Ternary Protein Fragment Complementation. Anal Chem 2018; 90:3001-3004. [PMID: 29446920 DOI: 10.1021/acs.analchem.7b05140] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The homogeneous immunological detection of small molecules at high sensitivity is still a daunting task. Here, we tried sensitive noncompetitive detection of small peptides based on the open-sandwich immunoassay principle, which was combined with a bioluminescent protein-fragment complementation assay (PCA) in vitro. Since the detection of antigen-induced approximation of the two antibody variable region fragments VH and VL by the standard Nanoluc-based PCA utilizing larger (LgBiT) and shorter (SmBiT) fragments was not successful, we decided to further split LgBiT into two, yielding smaller N-terminal derivative (LnBiT) and two C-terminal, 11 residue peptides (LcBiT and SmBiT) corresponding to consecutive beta strands, to which VH and VL were each fused and expressed in Escherichia coli cells. Through the optimization of reaction conditions and peptide sequence, the antigen osteocalcin peptide can be noncompetitively detected with a low background signal and limit of detection, yielding a high light emission of 88% compared to that of the wild-type enzyme. Since the luminescence of this open sandwich bioluminescent immunoassay (OS-BLIA) can be observed with the naked eye, it could become the foundation of many point-of-care detection systems.
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Affiliation(s)
- Yuki Ohmuro-Matsuyama
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
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34
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Liu A, Anfossi L, Shen L, Li C, Wang X. Non-competitive immunoassay for low-molecular-weight contaminant detection in food, feed and agricultural products: A mini-review. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2017.11.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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35
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Sakamoto S, Putalun W, Vimolmangkang S, Phoolcharoen W, Shoyama Y, Tanaka H, Morimoto S. Enzyme-linked immunosorbent assay for the quantitative/qualitative analysis of plant secondary metabolites. J Nat Med 2018; 72:32-42. [PMID: 29164507 PMCID: PMC5775980 DOI: 10.1007/s11418-017-1144-z] [Citation(s) in RCA: 264] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 10/09/2017] [Indexed: 11/30/2022]
Abstract
Immunoassays are antibody-based analytical methods for quantitative/qualitative analysis. Since the principle of immunoassays is based on specific antigen-antibody reaction, the assays have been utilized worldwide for diagnosis, pharmacokinetic studies by drug monitoring, and the quality control of commercially available products. Berson and Yalow were the first to develop an immunoassay, known as radioimmunoassay (RIA), for detecting endogenous plasma insulin [1], a development for which Yalow was awarded the Nobel Prize in Physiology or Medicine in 1977. Even today, after half a century, immunoassays are widely utilized with some modifications from the originally proposed system, e.g., radioisotopes have been replaced with enzymes because of safety concerns regarding the use of radioactivity, which is referred to as enzyme immunoassay/enzyme-linked immunosorbent assay (ELISA). In addition, progress has been made in ELISA with the recent advances in recombinant DNA technology, leading to increase in the range of antibodies, probes, and even systems. This review article describes ELISA and its applications for the detection of plant secondary metabolites.
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Affiliation(s)
- Seiichi Sakamoto
- Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Waraporn Putalun
- Research Group for Pharmaceutical Activities of Natural Products using Pharmaceutical Biotechnology (PANPB), Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sornkanok Vimolmangkang
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phayathai Rd. Pathumwan, Bangkok, 10330, Thailand
| | - Waranyoo Phoolcharoen
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, 254 Phayathai Rd. Pathumwan, Bangkok, 10330, Thailand
| | - Yukihiro Shoyama
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagasaki International University, 2825-7 Huis Ten Bosch, Sasebo, Nagasaki, 859-3298, Japan
| | - Hiroyuki Tanaka
- Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Satoshi Morimoto
- Department of Pharmacognosy, Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
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36
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Su J, Dong J, Kitaguchi T, Ohmuro-Matsuyama Y, Ueda H. Noncompetitive homogeneous immunodetection of small molecules based on beta-glucuronidase complementation. Analyst 2018; 143:2096-2101. [DOI: 10.1039/c8an00074c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Small molecules can be sensitively detected with a positive signal by just mixing and measuring the β-glucuronidase activity within 20 min.
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Affiliation(s)
- Jiulong Su
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
| | - Jinhua Dong
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
- Key Laboratory of Biological Medicine in Universities of Shandong Province
| | - Tetsuya Kitaguchi
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
| | - Yuki Ohmuro-Matsuyama
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
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37
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Peltomaa R, Benito-Peña E, Moreno-Bondi MC. Bioinspired recognition elements for mycotoxin sensors. Anal Bioanal Chem 2017; 410:747-771. [PMID: 29127461 DOI: 10.1007/s00216-017-0701-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 10/05/2017] [Accepted: 10/10/2017] [Indexed: 12/16/2022]
Abstract
Mycotoxins are low molecular weight molecules produced as secondary metabolites by filamentous fungi that can be found as natural contaminants in many foods and feeds. These toxins have been shown to have adverse effects on both human and animal health, and are the cause of significant economic losses worldwide. Sensors for mycotoxin analysis have traditionally applied elements of biological origin for the selective recognition purposes. However, since the 1970s there has been an exponential growth in the use of genetically engineered or synthetic biomimetic recognition elements that allow some of the limitations associated with the use of natural receptors for the analyses of these toxins to be circumvented. This review provides an overview of recent advances in the application of bioinspired recognition elements, including recombinant antibodies, peptides, aptamers, and molecularly imprinted polymers, to the development of sensors for mycotoxins based on different transduction elements. Graphical abstract Novel analytical methods based on bioinspired recognition elements, such as recombinant antibodies, peptides, aptamers, and molecularly imprinted polymers, can improve the detection of mycotoxins and provide better tools than their natural counterparts to ensure food safety.
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Affiliation(s)
- Riikka Peltomaa
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain
| | - Elena Benito-Peña
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain
| | - María C Moreno-Bondi
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain.
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38
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Saita T, Yamamoto Y, Hosoya K, Yamamoto Y, Kimura S, Narisawa Y, Shin M. An ultra-specific and sensitive sandwich ELISA for imatinib using two anti-imatinib antibodies. Anal Chim Acta 2017; 969:72-78. [PMID: 28411632 DOI: 10.1016/j.aca.2017.03.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/13/2017] [Accepted: 03/17/2017] [Indexed: 11/19/2022]
Abstract
The development of an immunoassay for a low-molecular-weight drug first requires the identification of specific antibodies that do not cross-react with the drug's metabolites. If two antibodies can simultaneously recognize the entire structure of the drug, we can then utilize them to establish an ultra-specific sandwich ELISA, free from interference due to the metabolic products of the drug. This paper reports an ultra-specific and sensitive sandwich ELISA for determination of the tyrosine kinase inhibitor imatinib using two anti-imatinib antibodies. The anti-imatinib antibodies were obtained by two partial structures of imatinib as haptens (2-(5-amino-2-methylanilino)-4-(3-pyridyl)pyrimidine and 4-{(4-methyl-1-piperazinyl)-methyl}-benzoate). Under optimized conditions, this sandwich ELISA shows a linear detection range from 64 pg mL-1 to 8 ng mL-1, and a limit of detection of approximately 64 pg mL-1 for 100-μL samples. The ELISA is specific to imatinib and while there was no cross-reactivity with the major metabolite N-desmethyl-imatinib, slight cross-reactivity was found with metabolite pyridine-N-oxide-imatinib. This assay demonstrated significantly lower cross-reactivity with metabolites than competitive ELISAs. Using this assay, drug levels were easily measured in rat blood after oral administration of imatinib via a single dose of 30 mg kg-1 or 100 mg kg-1. The levels in rat serum measured by this ELISA were comparable with those measured by HPLC, and there was a strong correlation between the values determined by the two methods (y = 0.983x + 0.081, R2 = 0.948). Thus, we have successfully developed the first specific and sensitive sandwich ELISA for imatinib using two anti-imatinib antibodies. This sandwich ELISA will be a valuable tool for therapeutic drug monitoring and pharmacokinetic studies of imatinib.
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Affiliation(s)
- Tetsuya Saita
- Applied Life Science Department, Faculty of Biotechnology and Life Science, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan.
| | - Yuta Yamamoto
- Applied Life Science Department, Faculty of Biotechnology and Life Science, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Kazuhisa Hosoya
- Department of Pharmacy, Saga University Hospital, 5-1-1 Nabeshima, Saga 849-8501, Japan
| | - Yutaro Yamamoto
- Applied Life Science Department, Faculty of Biotechnology and Life Science, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
| | - Sakiko Kimura
- Department of Pharmacy, Saga University Hospital, 5-1-1 Nabeshima, Saga 849-8501, Japan
| | - Yutaka Narisawa
- Department of Pharmacy, Saga University Hospital, 5-1-1 Nabeshima, Saga 849-8501, Japan; Division of Dermatology, Department of Internal Medicine, Saga University, 5-1-1 Nabeshima, Saga 849-8501, Japan
| | - Masashi Shin
- Applied Life Science Department, Faculty of Biotechnology and Life Science, Sojo University, 4-22-1 Ikeda, Kumamoto 860-0082, Japan
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Dong J, Ueda H. ELISA-type assays of trace biomarkers using microfluidic methods. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2017; 9. [DOI: 10.1002/wnan.1457] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 11/15/2016] [Accepted: 12/17/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Jinhua Dong
- Shandong Provincial Key Laboratory of Detection Technology for Tumor Markers; College of Chemistry and Chemical Engineering, Linyi University; Linyi P.R. China
- Laboratory for Chemistry and Life Science, Institute of Innovative Research; Tokyo Institute of Technology; Yokohama Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research; Tokyo Institute of Technology; Yokohama Japan
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40
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Chung CI, Makino R, Ohmuro-Matsuyama Y, Ueda H. Development of a fluorescent protein-antibody Förster resonance energy transfer probe for the detection and imaging of osteocalcin. J Biosci Bioeng 2017; 123:272-276. [DOI: 10.1016/j.jbiosc.2016.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 09/04/2016] [Accepted: 09/07/2016] [Indexed: 11/27/2022]
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41
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Dong J, Shichiri M, Chung CI, Shibata T, Uchida K, Hagihara Y, Yoshida Y, Ueda H. An open sandwich immunoassay for detection of 13(R,S)-hydroxy-9(E),11(E)-octadecadienoic acid. Analyst 2017; 142:787-793. [DOI: 10.1039/c6an02437h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lipid peroxidation is involved in many disorders and diseases such as cardiovascular disease, cancers, neurodegenerative diseases, and even aging.
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Affiliation(s)
- Jinhua Dong
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
| | - Mototada Shichiri
- Health Research Institute
- National Institute of Advanced Industrial Science and Technology
- Japan
| | - Chan-I. Chung
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
| | - Takahiro Shibata
- Graduate School of Bioagricultural Sciences
- Nagoya University
- Japan
| | - Koji Uchida
- Graduate School of Bioagricultural Sciences
- Nagoya University
- Japan
| | - Yoshihisa Hagihara
- Health Research Institute
- National Institute of Advanced Industrial Science and Technology
- Japan
| | - Yasukazu Yoshida
- Health Research Institute
- National Institute of Advanced Industrial Science and Technology
- Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science
- Institute of Innovative Research
- Tokyo Institute of Technology
- Japan
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42
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Affiliation(s)
- Yi Zhang
- Department of Applied Chemistry, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiroyuki Noji
- Department of Applied Chemistry, School of Engineering, The University of Tokyo , 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.,Japan Science and Technology Agency , Tokyo 102-0076, Japan
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43
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Ohashi H, Matsumoto T, Jeong HJ, Dong J, Abe R, Ueda H. Insight into the Working Mechanism of Quenchbody: Transition of the Dye around Antibody Variable Region That Fluoresces upon Antigen Binding. Bioconjug Chem 2016; 27:2248-2253. [DOI: 10.1021/acs.bioconjchem.6b00217] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroyuki Ohashi
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Ushio Incorporated, 6409 Motoishikawa-cho, Aoba-ku, Yokohama 225-0004, Japan
| | - Takashi Matsumoto
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hee-Jin Jeong
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Laboratory
for Chemistry and Life Science, Tokyo Institute of Technology, 4259-R1-18,
Nagatsuta-cho, Midori-ku, Yokoyama, Kanagawa 226-8503, Japan
| | - Jinhua Dong
- Laboratory
for Chemistry and Life Science, Tokyo Institute of Technology, 4259-R1-18,
Nagatsuta-cho, Midori-ku, Yokoyama, Kanagawa 226-8503, Japan
| | - Ryoji Abe
- Ushio Incorporated, 6409 Motoishikawa-cho, Aoba-ku, Yokohama 225-0004, Japan
| | - Hiroshi Ueda
- Department
of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Laboratory
for Chemistry and Life Science, Tokyo Institute of Technology, 4259-R1-18,
Nagatsuta-cho, Midori-ku, Yokoyama, Kanagawa 226-8503, Japan
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44
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Dong J, Jeong HJ, Ueda H. Preparation of Quenchbodies by protein transamination reaction. J Biosci Bioeng 2016; 122:125-30. [DOI: 10.1016/j.jbiosc.2015.12.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 12/14/2015] [Accepted: 12/15/2015] [Indexed: 12/27/2022]
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45
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Iwai H, Kojima-Misaizu M, Dong J, Ueda H. Creation of a Ligand-Dependent Enzyme by Fusing Circularly Permuted Antibody Variable Region Domains. Bioconjug Chem 2016; 27:868-73. [DOI: 10.1021/acs.bioconjchem.6b00040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hiroto Iwai
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Miki Kojima-Misaizu
- Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Jinhua Dong
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - Hiroshi Ueda
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
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46
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Arola HO, Tullila A, Kiljunen H, Campbell K, Siitari H, Nevanen TK. Specific Noncompetitive Immunoassay for HT-2 Mycotoxin Detection. Anal Chem 2016; 88:2446-52. [DOI: 10.1021/acs.analchem.5b04591] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Henri O. Arola
- VTT Technical
Research Centre of Finland, Tietotie
2, FI-02150 Espoo, Finland
| | - Antti Tullila
- VTT Technical
Research Centre of Finland, Tietotie
2, FI-02150 Espoo, Finland
| | - Harri Kiljunen
- VERIFIN, Finnish
Institute for Chemical Weapons Convention, Department of Chemistry, University of Helsinki, A. I. Virtasen
aukio 1, FI-00014 Helsinki, Finland
| | - Katrina Campbell
- Institute for Global
Food Security, Queen’s University Belfast, School of Biological Sciences, 8 Cloreen Park, Malone Road, Belfast BT7 1NN, United Kingdom
| | - Harri Siitari
- Faculty
of Pharmacy, University of Helsinki, Viikinkaari 5 E, FI-00014 Helsinki, Finland
| | - Tarja K. Nevanen
- VTT Technical
Research Centre of Finland, Tietotie
2, FI-02150 Espoo, Finland
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47
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Sensitive ligand-based protein quantification using immuno-PCR: A critical review of single-probe and proximity ligation assays. Biotechniques 2015; 56:217-28. [PMID: 24919231 DOI: 10.2144/000114164] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Quantitative PCR (qPCR) of reverse-transcribed mRNA has revolutionized gene expression analyses. qPCR analysis is based on the prevalent assumption that mRNA transcript numbers provide an adequate measure of specific biomarker expression. However, taking the complexity of protein turnover into account, there is a need to correlate qPCR-derived transcriptional patterns with protein translational patterns so as to not leave behind important pathobiological details. One emerging approach in protein analysis is PCR-coupled protein quantification, often denoted as immuno-PCR (iPCR), which targets soluble proteins. Here we review recent trends and applications in iPCR assays that may bridge the gap between classical enzyme-linked immunosorbent assays and mass spectrometry methodologies in terms of sensitivity and multiplexing.
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48
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Optimal fusion of antibody binding domains resulted in higher affinity and wider specificity. J Biosci Bioeng 2015; 120:504-9. [PMID: 25910963 DOI: 10.1016/j.jbiosc.2015.03.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 03/21/2015] [Accepted: 03/23/2015] [Indexed: 11/20/2022]
Abstract
Antibody is a very important protein in biotechnological and biomedical fields because of its high affinity and specificity to various antigens. Due to the rise of human antibody therapeutics, its cost-effective purification is an urgent issue for bio-industry. In this study, we made novel fusion proteins PAxPG with a flexible (DDAKK)n linker between the two Ig binding domains derived from Staphylococcus protein A and Streptococcus protein G. The fusion proteins bound human and mouse IgGs and their fragments with up to 58-times higher affinity and wider specificity than the parental binding domains. Interestingly, the optimal linker for human Fab fragment was n = 4, which was close to the modeled distance between the termini of domains bound to heavy chain, implying increased avidity as a possible mechanism. For binding to Fc, the longest n=6 linker gave the highest affinity, implying longer interchain distance between the two binding sites. The novel fusion protein with optimized interdomain linker length will be a useful tool for the purification and detection of various IgGs including mouse IgG1 that binds only weakly to natural protein A.
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49
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Chung CI, Makino R, Dong J, Ueda H. Open Flower Fluoroimmunoassay: A General Method To Make Fluorescent Protein-Based Immunosensor Probes. Anal Chem 2015; 87:3513-9. [DOI: 10.1021/acs.analchem.5b00088] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chan-I Chung
- Department
of Chemistry and Biotechnology, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Ryoji Makino
- Department
of Chemistry and Biotechnology, School of Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Jinhua Dong
- Chemical
Resources Laboratory, Tokyo Institute of Technology, 4259-R1-18, Nagatsuta-cho, Midori-ku, Yokoyama, Kanagawa 226-8503, Japan
| | - Hiroshi Ueda
- Chemical
Resources Laboratory, Tokyo Institute of Technology, 4259-R1-18, Nagatsuta-cho, Midori-ku, Yokoyama, Kanagawa 226-8503, Japan
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50
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Créminon C, Taran F. Enzyme immunoassays as screening tools for catalysts and reaction discovery. Chem Commun (Camb) 2015; 51:7996-8009. [DOI: 10.1039/c5cc00599j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This feature article summarizes the development and use of immunoassay techniques (ELISA) as screening tools for fast identification of efficient catalysts in libraries and for the discovery of new chemical reactions.
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Affiliation(s)
| | - Frédéric Taran
- CEA
- iBiTecS
- Service de Chimie Bioorganique et de Marquage
- Gif sur Yvette
- France
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