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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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2
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Sasamoto K, Yasuda T, Zhu B, Ueda H, Kitaguchi T. Efficient and rapid linker optimization with heterodimeric coiled coils improves the response of fluorescent biosensors comprising antibodies and protein M. Analyst 2023; 148:5843-5850. [PMID: 37941425 DOI: 10.1039/d3an01499a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
We developed a coiled Q-probe (CQ-probe), a fluorescent probe containing a coiled-coil peptide pair E4/K4, to convert antibodies into biosensors for homogeneous immunoassays. This probe consists of an antibody-binding protein, protein M (PM) with the E4 peptide and the K4 peptide with a fluorescent dye. Compared to PM Q-probes, which are generated by modifying the C-terminus of PM with a fluorescent dye, CQ-probe variants with various linkers are easy to prepare and therefore enable the establishment of biosensors with a significant fluorescence response by localizing the fluorescent dye at the optimal position for quenching and antigen-dependent release. The fluorescence changes of biosensors converted from anti-BGP, anti-cortisol, and anti-testosterone antibodies using the rhodamine 6G (or TAMRA)-labeled CQ-probe upon antigen addition were 13 (or 2.6), 9.7 (or 1.5), and 2.1 (or 1.2) times larger than that of the biosensors converted using the PM Q-probe. Furthermore, the CQ-probe converted anti-digoxin IgG into a functional biosensor, whereas the PM Q-probe/antibody complex showed an insufficient response. This technology exhibits a promising capacity to convert antibodies into high-response biosensors, which are expected to be applied in a wide range of fields, including clinical diagnosis, environmental surveys, food analysis, and biological research.
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Affiliation(s)
- Kana Sasamoto
- Graduate School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Takanobu Yasuda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.
| | - Bo Zhu
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 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, Kanagawa 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, Kanagawa 226-8503, Japan.
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Jeong HJ. Quenchbodies That Enable One-Pot Detection of Antigens: A Structural Perspective. Bioengineering (Basel) 2023; 10:1262. [PMID: 38002387 PMCID: PMC10669387 DOI: 10.3390/bioengineering10111262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 10/21/2023] [Accepted: 10/25/2023] [Indexed: 11/26/2023] Open
Abstract
Quenchbody (Q-body) is a unique, reagentless, fluorescent antibody whose fluorescent intensity increases in an antigen-concentration-dependent manner. Q-body-based homogeneous immunoassay is superior to conventional immunoassays as it does not require multiple immobilization, reaction, and washing steps. In fact, simply mixing the Q-body and the sample containing the antigen enables the detection of the target antigen. To date, various Q-bodies have been developed to detect biomarkers of interest, including haptens, peptides, proteins, and cells. This review sought to describe the principle of Q-body-based immunoassay and the use of Q-body for various immunoassays. In particular, the Q-bodies were classified from a structural perspective to provide useful information for designing Q-bodies with an appropriate objective.
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Affiliation(s)
- Hee-Jin Jeong
- Department of Biological and Chemical Engineering, Hongik University, Sejong-si 30016, Republic of Korea
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4
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Immunosensor for realtime monitoring of the expression of recombinant proteins during bioprocess. Anal Biochem 2023; 665:115069. [PMID: 36716945 DOI: 10.1016/j.ab.2023.115069] [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: 12/10/2022] [Revised: 01/16/2023] [Accepted: 01/26/2023] [Indexed: 01/30/2023]
Abstract
Recombinant protein expression and purification are crucial in modern life sciences research. A fluorescent immunosensor termed Quenchbody (Q-body) was developed for real-time monitoring of FLAG-fused protein expression. Detection results showed that the limit of detection of the 3 × FLAG peptide detected by the TAMRA-labeled anti-FLAG Q-body was as low as 3.1 nM, with a half-maximal effective concentration of 21.4 nM. Furthermore, the anti-FLAG Q-body was used for detecting different proteins fused with a FLAG-tag at the N- or C-terminal. Subsequently, the constructed Q-body was used to monitor the real-time fermentation process of single-strand DNA-binding protein in Escherichia coli. Unlike previously reported Q-bodies that widely used Fab or scFv, the present study used a full-length anti-FLAG IgG for the first time. Owing to its excellent detection speed and sensitivity, the FLAG Q-body immunosensor has the potential to quantify and monitor target recombinant proteins in multiple biological processes in real-time.
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Li H, Zhu B, Li B, Chen L, Ning X, Dong H, Liang J, Yang X, Dong J, Ueda H. Isolation of a human SARS-CoV-2 neutralizing antibody from a synthetic phage library and its conversion to fluorescent biosensors. Sci Rep 2022; 12:15496. [PMID: 36109569 PMCID: PMC9476436 DOI: 10.1038/s41598-022-19699-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 09/02/2022] [Indexed: 11/21/2022] Open
Abstract
Since late 2019, the outbreak of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and the resultant spread of COVID-19 have given rise to a worldwide health crisis that is posing great challenges to public health and clinical treatment, in addition to serving as a formidable threat to the global economy. To obtain an effective tool to prevent and diagnose viral infections, we attempted to obtain human antibody fragments that can effectively neutralize viral infection and be utilized for rapid virus detection. To this end, several human monoclonal antibodies were isolated by bio-panning a phage-displayed human antibody library, Tomlinson I. The selected clones were demonstrated to bind to the S1 domain of the spike glycoprotein of SARS-CoV-2. Moreover, clone A7 in Fab and IgG formats were found to effectively neutralize the binding of S protein to angiotensin-converting enzyme 2 in the low nM range. In addition, this clone was successfully converted to quench-based fluorescent immunosensors (Quenchbodies) that allowed antigen detection within a few minutes, with the help of a handy fluorometer.
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Affiliation(s)
- Haimei Li
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Bo Zhu
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Baowei Li
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Limei Chen
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Xuerao Ning
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan
| | - Hang Dong
- School of Basic Medical Sciences, Peking University, Beijing, China
| | - Jingru Liang
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Xueying Yang
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China
| | - Jinhua Dong
- Weifang Key Laboratory for Antibodies Medicine, School of Life Science and Technology, Weifang Medical University, Weifang, China.
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.
- World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, China.
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.
- World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama, Japan.
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6
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Li H, Li X, Chen L, Li B, Dong H, Liu H, Yang X, Ueda H, Dong J. Quench-Release-Based Fluorescent Immunosensor for the Rapid Detection of Tumor Necrosis Factor α. ACS OMEGA 2021; 6:31009-31016. [PMID: 34841143 PMCID: PMC8613823 DOI: 10.1021/acsomega.1c03941] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 11/04/2021] [Indexed: 06/13/2023]
Abstract
Tumor necrosis factor α (TNF-α) is used as a biomarker for the diagnosis of various inflammatory and autoimmune diseases. In recent years, numerous approaches have been used for the qualitative and quantitative analyses of TNF-α. However, these methods have several drawbacks, such as a tedious and time-consuming process, high pH and temperature sensitivity, and increased chances of denaturation in vitro. Quenchbody (Q-body) is a fluorescence immunoprobe that functions based on the principle of photoinduced electron transfer and has been successful in detecting various substances. In this study, we constructed two Q-bodies based on a therapeutic antibody, adalimumab, to rapidly detect human TNF-α. Both sensors could detect TNF-α within 5 min. The results showed that the limit of detection (LOD) of TNF-α was as low as 0.123 ng/mL with a half-maximal effective concentration (EC50) of 25.0 ng/mL using the TAMRA-labeled Q-body, whereas the ATTO520-labeled Q-body had a LOD of 0.419 ng/mL with an EC50 of 65.6 ng/mL, suggesting that the Q-bodies could rapidly detect TNF-α with reasonable sensitivity over a wide detection range. These biosensors will be useful tools for the detection and monitoring of inflammatory biomarkers.
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Affiliation(s)
- Haimei Li
- Key
Laboratory for Biological Medicine in Shandong Universities, Weifang
Key Laboratory for Antibody Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Xinyu Li
- Key
Laboratory for Biological Medicine in Shandong Universities, Weifang
Key Laboratory for Antibody 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 Antibody 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 Antibody Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Hang Dong
- School
of Basic Medical Sciences, Peking University, Beijing 100191, China
| | - Hongying Liu
- Key
Laboratory for Biological Medicine in Shandong Universities, Weifang
Key Laboratory for Antibody Medicine, School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Xueying Yang
- Key
Laboratory for Biological Medicine in Shandong Universities, Weifang
Key Laboratory for Antibody Medicine, School of Life Science 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
- Laboratory
for Chemistry and Life Science, 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 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
- Laboratory
for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503 Japan
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7
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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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8
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Sato S, Matsumura M, Ueda H, Nakamura H. Preparation of an antigen-responsive fluorogenic immunosensor by tyrosine chemical modification of the antibody complementarity determining region. Chem Commun (Camb) 2021; 57:9760-9763. [PMID: 34477721 DOI: 10.1039/d1cc03231c] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Full-length pharmaceutical antibodies, trastuzumab and rituximab, were chemically modified into Quenchbody, a fluorescent immunosensor, using a two-step reaction: (1) selective tyrosine residue modification of antibody complementarity determining regions (CDRs), and (2) introduction of fluorescent dye molecules by Cu-free click reaction. Without the need for genetic manipulation and time-consuming examination of protein expression conditions, the antibody-dye combination with good antigen response efficiency was examined in a simple two-hour operation.
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Affiliation(s)
- Shinichi Sato
- Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan.
| | - Masaki Matsumura
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259-R1-13, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan. .,School of Life Science and Engineering, Tokyo Institute of Technology, 4259-R1-13, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Hiroshi Ueda
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259-R1-13, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.
| | - Hiroyuki Nakamura
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, 4259-R1-13, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan.
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9
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Yasuda T, Inoue A, Kitaguchi T, Ueda H. Rapid construction of fluorescence quenching-based immunosensor Q-bodies using α-helical coiled-coil peptides. Chem Commun (Camb) 2021; 57:8206-8209. [PMID: 34308943 DOI: 10.1039/d1cc02605d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Here, we report a rapid and efficient method to fabricate Quenchbodies (Q-bodies) that can detect targets with antigen-dependent fluorescence augmentation using a stable coiled-coil peptide pair, E4 and K4 (coiled Q-body, CQ-body). The CQ-body allowed antigen detection not only in buffer but also in 50% plasma. Furthermore, we describe FRET-type CQ-bodies using a dual-coloured K4 peptide, which allowed a more precise antigen quantification. Lastly, successful fabrication of nanobody-based CQ-body shows its applicability to a range of antibody fragments.
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Affiliation(s)
- Takanobu Yasuda
- Graduate School of Life Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan
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Dong J, Ueda H. Recent Advances in Quenchbody, a Fluorescent Immunosensor. SENSORS 2021; 21:s21041223. [PMID: 33572319 PMCID: PMC7916128 DOI: 10.3390/s21041223] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2020] [Revised: 01/27/2021] [Accepted: 02/06/2021] [Indexed: 12/29/2022]
Abstract
The detection of viruses, disease biomarkers, physiologically active substances, drugs, and chemicals is of great significance in many areas of our lives. Immunodetection technology is based on the specificity and affinity of antigen–antibody reactions. Compared with other analytical methods such as liquid chromatography coupled with mass spectrometry, which requires a large and expensive instrument, immunodetection has the advantages of simplicity and good selectivity and is thus widely used in disease diagnosis and food/environmental monitoring. Quenchbody (Q-body), a new type of fluorescent immunosensor, is an antibody fragment labeled with fluorescent dyes. When the Q-body binds to its antigen, the fluorescence intensity increases. The detection of antigens by changes in fluorescence intensity is simple, easy to operate, and highly sensitive. This review comprehensively discusses the principle, construction, application, and current progress related to Q-bodies.
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Affiliation(s)
- Jinhua Dong
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan;
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
- School of Life Science and Technology, Weifang Medical University, Weifang 261053, China
| | - Hiroshi Ueda
- Tokyo Tech World Research Hub Initiative (WRHI), Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan;
- Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Yokohama 226-8503, Japan
- Correspondence: ; Tel.: +81-45-924-5256
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11
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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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12
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Komatsu K, Kumon K, Arita M, Onitsuka M, Omasa T, Yohda M. Effect of the disulfide isomerase PDIa4 on the antibody production of Chinese hamster ovary cells. J Biosci Bioeng 2020; 130:637-643. [PMID: 32878739 DOI: 10.1016/j.jbiosc.2020.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 07/22/2020] [Accepted: 08/02/2020] [Indexed: 12/30/2022]
Abstract
Therapeutic monoclonal antibodies recognize and bind specific molecules on the surface of target cells, stimulating the immune system, which can attack these targeted cells. These antibodies are produced by mammalian cells, including Chinese hamster ovary (CHO) cells, because the formation of antibodies requires complicated posttranslational modifications, including peptidyl-prolyl cis/trans isomerization, disulfide bond formation, and glycosylation. Currently, it is thought that the efficient production of secretory proteins is limited by posttranslational processes. The ER is the biosynthesis site of all secreted and membrane proteins. The accumulation of unfolded proteins in the ER causes the ER stress response. During the ER stress state, various molecular chaperones are expressed to prevent proteins from the aggregate formation. The molecular chaperone involved in ER stress likely plays an essential role in the production of secretory proteins. The purpose of this study was to improve the production of monoclonal antibodies by cells. We elucidated the function of ER chaperones in the production of a monoclonal antibody. First, we quantitatively measured the mRNA expression levels of protein disulfide-isomerase family members. In CHO HcD6 cells treated with tunicamycin, the expression level of pdia4 was significantly increased. Second, we investigated the relationship between PDIa4 and antibody productivity in pdia4-knockdown cells. Both a decrease in the amount of secreted antibody and the accumulation of immature antibodies inside the cells were observed. Recombinant PDIa4 was able to refold the antibodies and Fabs. These results indicate that PDIa4 affects the production of monoclonal antibodies by catalyzing disulfide bond formation in these antibodies in CHO cells.
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Affiliation(s)
- Kei Komatsu
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Kento Kumon
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Mayuno Arita
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
| | - Masayoshi Onitsuka
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, 2-1 Minamijosanjima-cho, Tokushima 770-8513, Japan
| | - Takeshi Omasa
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Masafumi Yohda
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan.
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Single-Step Detection of the Influenza Virus Hemagglutinin Using Bacterially-Produced Quenchbodies. SENSORS 2018; 19:s19010052. [PMID: 30583603 PMCID: PMC6338965 DOI: 10.3390/s19010052] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 12/05/2018] [Accepted: 12/20/2018] [Indexed: 01/07/2023]
Abstract
We have successfully generated a Quenchbody that enables the detection of the influenza virus hemagglutinin (HA), in a simple and convenient manner. By two-site labeling of the bacterially-produced anti-HA Fab with ATTO520, its fluorescence intensity was increased to 4.4-fold, in the presence of a nanomolar concentration of H1N1 HA. Our results indicate the potential use of this Quenchbody, as a sensor for the simple in situ detection of influenza A virus.
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14
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Fukunaga K, Watanabe T, Novitasari D, Ohashi H, Abe R, Hohsaka T. Antigen-responsive fluorescent antibody probes generated by selective N-terminal modification of IgGs. Chem Commun (Camb) 2018; 54:12734-12737. [DOI: 10.1039/c8cc07827k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Fluorescent antibody probes showing antigen-dependent fluorescence responses were developed by N-terminal-selective reductive alkylation of IgGs.
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Affiliation(s)
- Keisuke Fukunaga
- School of Materials Science
- Japan Advanced Institute of Science and Technology (JAIST)
- Ishikawa 923-1292
- Japan
| | - Takayoshi Watanabe
- School of Materials Science
- Japan Advanced Institute of Science and Technology (JAIST)
- Ishikawa 923-1292
- Japan
| | - Dian Novitasari
- School of Materials Science
- Japan Advanced Institute of Science and Technology (JAIST)
- Ishikawa 923-1292
- Japan
| | | | - Ryoji Abe
- Ushio Incorporated
- Yokohama 225-0004
- Japan
| | - Takahiro Hohsaka
- School of Materials Science
- Japan Advanced Institute of Science and Technology (JAIST)
- Ishikawa 923-1292
- Japan
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