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Du Y, Xu CM, Zhang YM, Pan ZX, Wang FS, Yang HM, Tang JB. Fabrication of cysteine-modified antibodies with Fc-specific conjugation for covalent and oriented immobilization of native antibodies. Int J Biol Macromol 2024; 276:133962. [PMID: 39029833 DOI: 10.1016/j.ijbiomac.2024.133962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 07/02/2024] [Accepted: 07/16/2024] [Indexed: 07/21/2024]
Abstract
Covalent and oriented immobilization of antibodies (Abs) can substantially improve the sensitivity and stability of solid-phase immunoassays. By modifying the natural Abs with functional groups that provide unique handles for further conjugation, Abs could be immobilized onto the solid matrices with uniform orientation. Herein, an effective approach for Fc-specific modification of Abs was developed for the oriented and covalent immobilization of Abs. Twelve photoreactive Z-domain variants, incorporated with a photoactivable probe (p-benzoyl-L-phenylalanine, Bpa) at different positions and carrying a C-terminal Cys-tag (i.e. ZBpa-Cys variants), were individually constructed and produced in Escherichia coli and tested for photo-cross-linking to various IgGs. The different ZBpa-Cys variants demonstrated large differences in photo-conjugation efficiency for the tested IgGs. The conjugation efficiencies of 17thZBpa-Cys ranged from 90 % to nearly 100 % for rabbit IgG and mouse IgG2a, IgG2b and IgG3. Other variants, including 5thZBpa-Cys, 18thZBpa-Cys, 32thZBpa-Cys, and 35thZBpa-Cys, also displayed conjugation efficiencies of 61 %-83 % for mouse IgG1, IgG2a and IgG3. Subsequently, the photo-modified Abs, namely IgG-Cys conjugates, were covalently immobilized onto a maleimide group-functionalized solid-phase carrier on the basis of the reaction of sulfhydryl and maleimide. Thus, a generic platform for the controlled and oriented immobilization of Abs was developed, and the efficacy and potential of the proposed approach for sensitive immunoassays was demonstrated by detecting human α-fetoprotein.
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Affiliation(s)
- Yue Du
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China
| | - Chong-Mei Xu
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China
| | - Yu-Min Zhang
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China
| | - Zheng-Xuan Pan
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China
| | - Feng-Shan Wang
- Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drugs, School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, Shandong, China
| | - Hong-Ming Yang
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China.
| | - Jin-Bao Tang
- Department of Biochemical Drugs, School of Pharmacy, Shandong Second Medical University, Weifang, 261053, Shandong, China.
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Justiz-Vaillant A, Gopaul D, Soodeen S, Unakal C, Thompson R, Pooransingh S, Arozarena-Fundora R, Asin-Milan O, Akpaka PE. Advancements in Immunology and Microbiology Research: A Comprehensive Exploration of Key Areas. Microorganisms 2024; 12:1672. [PMID: 39203514 PMCID: PMC11357253 DOI: 10.3390/microorganisms12081672] [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: 04/24/2024] [Revised: 07/26/2024] [Accepted: 07/29/2024] [Indexed: 09/03/2024] Open
Abstract
Immunology and microbiology research has witnessed remarkable growth and innovation globally, playing a pivotal role in advancing our understanding of immune mechanisms, disease pathogenesis, and therapeutic interventions. This manuscript presents a comprehensive exploration of the key areas in immunology research, spanning from the utilisation of bacterial proteins as antibody reagents to the intricate realms of clinical immunology and disease management. The utilisation of bacterial immunoglobulin-binding proteins (IBPs), including protein A (SpA), protein G (SpG), and protein L (SpL), has revolutionised serological diagnostics, showing promise in early disease detection and precision medicine. Microbiological studies have shed light on antimicrobial resistance patterns, particularly the emergence of extended-spectrum beta-lactamases (ESBLs), guiding antimicrobial stewardship programmes and informing therapeutic strategies. Clinical immunology research has elucidated the molecular pathways underlying immune-mediated disorders, resulting in tailored management strategies for conditions such as severe combined immunodeficiency (SCID), neuropsychiatric systemic lupus erythematosus (NPSLE), etc. Additionally, significant efforts in vaccine development against tuberculosis and HIV are highlighted, underscoring the ongoing global pursuit of effective preventive measures against these infectious diseases. In summary, immunology and microbiology research have provided significant contributions to global healthcare, fostering collaboration, innovation, and improved patient outcomes.
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Affiliation(s)
- Angel Justiz-Vaillant
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
| | - Darren Gopaul
- Port of Spain General Hospital, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago;
| | - Sachin Soodeen
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
| | - Chandrashekhar Unakal
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
| | - Reinand Thompson
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
| | - Shalini Pooransingh
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
| | - Rodolfo Arozarena-Fundora
- Eric Williams Medical Sciences Complex, North Central Regional Health Authority, Champs Fleurs 00000, Trinidad and Tobago;
- Department of Clinical and Surgical Sciences, Faculty of Medical Sciences, University of the West Indies, St. Augustine 00000, Trinidad and Tobago
| | | | - Patrick Eberechi Akpaka
- Department of Para-Clinical Sciences, University of the West Indies, St. Augustine Campus, St. Augustine 00000, Trinidad and Tobago; (S.S.); (C.U.); (R.T.); (S.P.); (P.E.A.)
- Eric Williams Medical Sciences Complex, North Central Regional Health Authority, Champs Fleurs 00000, Trinidad and Tobago;
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Wulandari DA, Tsuru K, Minamihata K, Wakabayashi R, Egami G, Kawabe Y, Kamihira M, Goto M, Kamiya N. Design and validation of functionalized redox-responsive hydrogel beads for high-throughput screening of antibody-secreting mammalian cells. J Biosci Bioeng 2024; 138:89-95. [PMID: 38644063 DOI: 10.1016/j.jbiosc.2024.04.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 04/02/2024] [Accepted: 04/02/2024] [Indexed: 04/23/2024]
Abstract
Antibody drugs play a vital role in diagnostics and therapy. However, producing antibodies from mammalian cells is challenging owing to cellular heterogeneity, which can be addressed by applying droplet-based microfluidic platforms for high-throughput screening (HTS). Here, we designed an integrated system based on disulfide-bonded redox-responsive hydrogel beads (redox-HBs), which were prepared through enzymatic hydrogelation, to compartmentalize, screen, select, retrieve, and recover selected Chinese hamster ovary (CHO) cells secreting high levels of antibodies. Moreover, redox-HBs were functionalized with protein G as an antibody-binding module to capture antibodies secreted from encapsulated cells. As proof-of-concept, cells co-producing immunoglobulin G (IgG) as the antibody and green fluorescent protein (GFP) as the reporter molecule, denoted as CHO(IgG/GFP), were encapsulated into functionalized redox-HBs. Additionally, antibody-secreting cells were labeled with protein L-conjugated horseradish peroxidase using a tyramide amplification system, enabling fluorescence staining of the antibody captured inside the beads. Redox-HBs were then applied to fluorescence-activated droplet sorting, and selected redox-HBs were degraded by reducing the disulfide bonds to recover the target cells. The results indicated the potential of the developed HTS platform for selecting a single cell viable for biopharmaceutical production.
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Affiliation(s)
- Diah Anggraini Wulandari
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kyosuke Tsuru
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kosuke Minamihata
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Rie Wakabayashi
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Go Egami
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshinori Kawabe
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masamichi Kamihira
- Department of Chemical Engineering, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Division of Biotechnology, Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Noriho Kamiya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Division of Biotechnology, Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
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Ahmed A, Fujimura NA, Tahir S, Akram M, Abbas Z, Riaz M, Raza A, Abbas R, Ahmed N. Soluble and insoluble expression of recombinant human interleukin-2 protein using pET expression vector in Escherichia coli. Prep Biochem Biotechnol 2024:1-13. [PMID: 38824503 DOI: 10.1080/10826068.2024.2361146] [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: 06/03/2024]
Abstract
Interleukin-2 has emerged as a potent protein-based drug to treat various cancers, AIDS, and autoimmune diseases. Despite its immense requirement, the production procedures are inefficient to meet the demand. Therefore, efficient production procedures must be adopted to improve protein yield and decrease procedural loss. This study analyzed cytoplasmic and periplasmic IL-2 expression for increased protein yield and significant biological activity. The study is focused on cloning IL-2 into a pET-SUMO and pET-28a vector that expresses IL-2 in soluble form and inclusion bodies, respectively. Both constructs were expressed into different E. coli expression strains, but the periplasmic and cytoplasmic expression of IL-2 was highest in overnight culture in Rosetta 2 (DE3). Therefore, E. coli Rosetta 2 (DE3) was selected for large-scale production and purification. Purified IL-2 was characterized by SDS-PAGE and western blotting, while its biological activity was determined using MTT bioassay. The results depict that the periplasmic and cytoplasmic IL-2 achieved adequate purification, yielding 0.86 and 0.51 mg/mL, respectively, with significant cytotoxic activity of periplasmic and cytoplasmic IL-2. Periplasmic IL-2 has shown better yield and significant biological activity in vitro which describes its attainment of native protein structure and function.
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Affiliation(s)
- Atif Ahmed
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Nao Akusa Fujimura
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Saad Tahir
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Muhammad Akram
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Zaheer Abbas
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Maira Riaz
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Ali Raza
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Rabia Abbas
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
| | - Nadeem Ahmed
- Centre of Excellence in Molecular Biology, University of the Punjab, Lahore, Pakistan
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Lee H. Separation of protein corona from nanoparticles under intracellular acidic conditions: effect of protonation on nanoparticle-protein and protein-protein interactions. Phys Chem Chem Phys 2024; 26:4000-4010. [PMID: 38224098 DOI: 10.1039/d3cp04887j] [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: 01/16/2024]
Abstract
Protein coronas separate from nanoparticles under intracellular acidic conditions however, competitive adsorption of multiple proteins and their protein network formation under different pH conditions have not yet been systematically studied at the atomic scale. Herein, we report all-atom molecular dynamics simulations of plasma proteins (human serum albumin and immunoglobulin gamma-1 chain C) adsorbed to 10 nm-sized carboxyl-terminated polystyrene (PS) nanoparticles at different protonation states that mimic extracellular and intracellular pH conditions of 7, 6-5, and 4.5. Binding free energies are calculated from umbrella sampling simulations, showing the significantly weakened binding between PS particles and proteins at the protonation state at pH 4.5, in agreement with experiments showing the separation of protein corona from nanoparticles at pH 4.5. Mixtures of multiple proteins and PS particles are also simulated, showing much less protein adsorption and protein cluster formation at the protonation state at pH 4.5 than that at higher pH values, which are further confirmed by calculating the diffusivities and hydrodynamic radii of individual proteins. In particular, electrostatic particle-protein and protein-protein interactions are significantly weakened by a combination of particle and protein protonation rather than by particle protonation alone, to an extent dependent on different proteins. These findings help explain the experimental observations regarding separation of protein corona from nanoparticles under intracellular acidic conditions at pH 4.5 but not at higher pH, supporting that acidification cannot be the only reason for this separation during the process of endosome maturation.
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Affiliation(s)
- Hwankyu Lee
- Department of Chemical Engineering, Dankook University, Yongin-si, 16890, South Korea.
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Wulandari DA, Tsuru K, Minamihata K, Wakabayashi R, Goto M, Kamiya N. A Functional Hydrogel Bead-Based High-Throughput Screening System for Mammalian Cells with Enhanced Secretion of Therapeutic Antibodies. ACS Biomater Sci Eng 2024; 10:628-636. [PMID: 38048166 DOI: 10.1021/acsbiomaterials.3c01386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Droplet-based high-throughput screening systems are an emerging technology that provides a quick test to screen millions of cells with distinctive characteristics. Biopharmaceuticals, specifically therapeutic proteins, are produced by culturing cells that secrete heterologous recombinant proteins with different populations and expression levels; therefore, a technology to discriminate cells that produce more target proteins is needed. Here, we present a droplet-based microfluidic strategy for encapsulating, screening, and selecting target cells with redox-responsive hydrogel beads (HBs). As a proof-of-concept study, we demonstrate the enrichment of hybridoma cells with enhanced capability of antibody secretion using horseradish peroxidase (HRP)-catalyzed hydrogelation of tetra-thiolate poly(ethylene glycol); hybridoma cells were encapsulated in disulfide-bonded HBs. Recombinant protein G or protein M with a C-terminal cysteine residue was installed in the HBs via disulfide bonding to capture antibodies secreted from the cells. HBs were fluorescently stained by adding the protein L-HRP conjugate using a tyramide signal amplification system. HBs were then separated by fluorescence-activated droplet sorting and degraded by reducing the disulfide bonds to recover the target cells. Finally, we succeeded in the selection of hybridoma cells with enhanced antibody secretion, indicating the potential of this system in the therapeutic protein production.
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Affiliation(s)
- Diah Anggraini Wulandari
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kyosuke Tsuru
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kosuke Minamihata
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Rie Wakabayashi
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Division of Biotechnology, Centre for Future Chemistry, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
| | - Noriho Kamiya
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
- Division of Biotechnology, Centre for Future Chemistry, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka 819-0395, Japan
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Babl A, Greulich F. Cleavage Under Targets and Release Using Nuclease (CUT&RUN) in Macrophages. Methods Mol Biol 2024; 2846:151-167. [PMID: 39141235 DOI: 10.1007/978-1-0716-4071-5_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
Cleavage Under Targets and Release Using Nuclease (CUT&RUN) is a method to detect specific interactions between DNA and DNA-associated proteins. It is valuable for the characterization of the binding of transcription factors or co-regulators genome wide. Furthermore, it can be used for epigenetic profiling, chromatin accessibility assessment, and identification of regulatory elements. Compared to the more commonly used chromatin immunoprecipitation (ChIP), CUT&RUN has several advantages including an in situ approach as well as no need for sonication. However, the biggest advantage is the reduced cell amounts that are required for CUT&RUN, which makes it more attractive for experiments with limited cell numbers. In this chapter, we describe a reliable CUT&RUN protocol for macrophages that can be performed within 2 days and includes a library preparation so that the sample can be directly sequenced.
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Affiliation(s)
- Antonia Babl
- Metabolic Programming, TUM School of Life Sciences, Technical University of Munich, Freising, Germany
| | - Franziska Greulich
- Metabolic Programming, TUM School of Life Sciences, Technical University of Munich, Freising, Germany.
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Delaney S, Nagy Á, Karlström AE, Zeglis BM. Site-Specific Photoaffinity Bioconjugation for the Creation of 89Zr-Labeled Radioimmunoconjugates. Mol Imaging Biol 2023; 25:1104-1114. [PMID: 37052759 PMCID: PMC10570397 DOI: 10.1007/s11307-023-01818-5] [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: 02/06/2023] [Revised: 03/14/2023] [Accepted: 03/23/2023] [Indexed: 04/14/2023]
Abstract
PURPOSE Site-specific approaches to bioconjugation produce well-defined and homogeneous immunoconjugates with potential for superior in vivo behavior compared to analogs synthesized using traditional, stochastic methods. The possibility of incorporating photoaffinity chemistry into a site-specific bioconjugation strategy is particularly enticing, as it could simplify and accelerate the preparation of homogeneous immunoconjugates for the clinic. In this investigation, we report the synthesis, in vitro characterization, and in vivo evaluation of a site-specifically modified, 89Zr-labeled radioimmunoconjugate created via the reaction between an mAb and an Fc-binding protein bearing a photoactivatable 4-benzoylphenylalanine residue. PROCEDURES A variant of the Fc-binding Z domain of protein A containing a photoactivatable, 4-benzoylphenylalanine residue - Z(35BPA) - was modified with desferrioxamine (DFO), combined with the A33 antigen-targeting mAb huA33, and irradiated with UV light. The resulting immunoconjugate - DFOZ(35BPA)-huA33 - was purified and characterized via SDS-PAGE, MALDI-ToF mass spectrometry, surface plasmon resonance, and flow cytometry. The radiolabeling of DFOZ(35BPA)-huA33 was optimized to produce [89Zr]Zr-DFOZ(35BPA)-huA33, and the immunoreactivity of the radioimmunoconjugate was determined with SW1222 human colorectal cancer cells. Finally, the in vivo performance of [89Zr]Zr-DFOZ(35BPA)-huA33 in mice bearing subcutaneous SW1222 xenografts was interrogated via PET imaging and biodistribution experiments and compared to that of a stochastically labeled control radioimmunoconjugate, [89Zr]Zr-DFO-huA33. RESULTS HuA33 was site-specifically modified with Z(35BPA)-DFO, producing an immunoconjugate with on average 1 DFO/mAb, high in vitro stability, and high affinity for its target. [89Zr]Zr-DFOZ(35BPA)-huA33 was synthesized in 95% radiochemical yield and exhibited a specific activity of 2 mCi/mg and an immunoreactive fraction of ~ 0.85. PET imaging and biodistribution experiments revealed that high concentrations of the radioimmunoconjugate accumulated in tumor tissue (i.e., ~ 40%ID/g at 120 h p.i.) but also that the Z(35BPA)-bearing immunoPET probe produced higher uptake in the liver, spleen, and kidneys than its stochastically modified cousin, [89Zr]Zr-DFO-huA33. CONCLUSIONS Photoaffinity chemistry and an Fc-binding variant of the Z domain were successfully leveraged to create a novel site-specific strategy for the synthesis of radioimmunoconjugates. The probe synthesized using this method - DFOZ(35BPA)-huA33 - was well-defined and homogeneous, and the resulting radioimmunoconjugate ([89Zr]Zr-DFOZ(35BPA)-huA33) boasted high specific activity, stability, and immunoreactivity. While the site-specifically modified radioimmunoconjugate produced high activity concentrations in tumor tissue, it also yielded higher uptake in healthy organs than a stochastically modified analog, suggesting that optimization of this system is necessary prior to clinical translation.
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Affiliation(s)
- Samantha Delaney
- Department of Chemistry, Hunter College, City University of New York, New York, NY, USA
- Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY, USA
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ábel Nagy
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Amelie Eriksson Karlström
- Department of Protein Science, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden.
| | - Brian M Zeglis
- Department of Chemistry, Hunter College, City University of New York, New York, NY, USA.
- Ph.D. Program in Biochemistry, The Graduate Center of the City University of New York, New York, NY, USA.
- Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, NY, USA.
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York, NY, USA.
- Department of Radiology, Weill Cornell Medical College, New York, NY, USA.
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9
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Pareek A, Buddhiraju VS, Masampally VS, Premraj K, Runkana V. Comparison of multi-column chromatography configurations through model-based optimization. Biotechnol Prog 2023; 39:e3376. [PMID: 37454372 DOI: 10.1002/btpr.3376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 05/30/2023] [Accepted: 06/30/2023] [Indexed: 07/18/2023]
Abstract
Integrated continuous bioprocessing has been identified as the next important phase of evolution in biopharmaceutical manufacturing. Multiple platform technologies to enable continuous processing are being developed. Multi-column counter-current chromatography is a step in this direction to provide increased productivity and capacity utilization to capture biomolecules like monoclonal antibodies (mAbs) present in the reactor harvest and remove impurities. Model-based optimization of two prevalent multi-column designs, 3-column and 4-column periodic counter-current chromatography (PCC) was carried out for different concentrations of mAbs in the feed, durations of cleaning-in-place and equilibration protocols. The multi-objective optimization problem comprising three performance measures, namely, product yield, productivity, and capacity utilization was solved using the Radial basis function optimization technique. The superficial velocities during load, wash, and elute operations, along with durations of distinct stages present in the multi-column operations were considered as decision variables. Optimization results without the constraint on number of wash volumes showed that 3-Column PCC performs better than 4-Column PCC. For example, at a feed concentration of 1.2 mg/mL, productivity, yield and capacity utilization, respectively, were 0.024 mg/mL.s, 0.94, and 0.94 for 3-Column PCC and 0.017 mg/mL.s, 0.87, and 0.83 for 4-column PCC. Similar trends were observed at higher feed concentrations also. However, when the constraint on number of wash volumes is included, 4-Column PCC was found to result in consistent productivity and product yield under different operating conditions but at the expense of reduced capacity utilization.
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Affiliation(s)
- Aditya Pareek
- TCS Research, Tata Research Development and Design Centre, Tata Consultancy Services, Pune, India
| | | | | | - Karundev Premraj
- TCS Research, Tata Research Development and Design Centre, Tata Consultancy Services, Pune, India
| | - Venkataramana Runkana
- TCS Research, Tata Research Development and Design Centre, Tata Consultancy Services, Pune, India
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10
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Timofeeva AM, Sedykh SE, Sedykh TA, Nevinsky GA. Natural Antibodies Produced in Vaccinated Patients and COVID-19 Convalescents Recognize and Hydrolyze Oligopeptides Corresponding to the S-Protein of SARS-CoV-2. Vaccines (Basel) 2023; 11:1494. [PMID: 37766170 PMCID: PMC10535122 DOI: 10.3390/vaccines11091494] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/13/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
The S-protein is the major antigen of the SARS-CoV-2 virus, against which protective antibodies are generated. The S-protein gene was used in adenoviral vectors and mRNA vaccines against COVID-19. While the primary function of antibodies is to bind to antigens, catalytic antibodies can hydrolyze various substrates, including nucleic acids, proteins, oligopeptides, polysaccharides, and some other molecules. In this study, antibody fractions with affinity for RBD and S-protein (RBD-IgG and S-IgG) were isolated from the blood of COVID-19 patients vaccinated with Sputnik V. The fractions were analyzed for their potential to hydrolyze 18-mer oligopeptides corresponding to linear fragments of the SARS-CoV-2 S-protein. Here, we show that the IgG antibodies hydrolyze six out of nine oligopeptides efficiently, with the antibodies of COVID-19-exposed donors demonstrating the most significant activity. The IgGs of control donors not exposed to SARS-CoV-2 were found to be inactive in oligopeptide hydrolysis. The antibodies of convalescents and vaccinated patients were found to hydrolyze oligopeptides in a wide pH range, with the optimal pH range between 6.5 and 7.5. The hydrolysis of most oligopeptides by RBD-IgG antibodies is inhibited by thiol protease inhibitors, whereas S-IgG active centers generally combine several types of proteolytic activities. Ca2+ ions increase the catalytic activity of IgG preparations containing metalloprotease-like active centers. Thus, the proteolytic activity of natural antibodies against the SARS-CoV-2 protein is believed to be due to the similarity of catalytic antibodies' active centers to canonical proteases. This work raises the question of the possible physiological role of proteolytic natural RBD-IgG and S-IgG resulting from vaccination and exposure to COVID-19.
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Affiliation(s)
- Anna M. Timofeeva
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk 630090, Russia
- Faculty of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Sergey E. Sedykh
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk 630090, Russia
- Faculty of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Tatyana A. Sedykh
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk 630090, Russia
- Faculty of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
| | - Georgy A. Nevinsky
- SB RAS Institute of Chemical Biology and Fundamental Medicine, Novosibirsk 630090, Russia
- Faculty of Natural Sciences, Novosibirsk State University, Novosibirsk 630090, Russia
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11
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Su X, Huang Z, Xu W, Wang Q, Xing L, Lu L, Jiang S, Xia S. IgG Fc-Binding Peptide-Conjugated Pan-CoV Fusion Inhibitor Exhibits Extended In Vivo Half-Life and Synergistic Antiviral Effect When Combined with Neutralizing Antibodies. Biomolecules 2023; 13:1283. [PMID: 37759683 PMCID: PMC10526447 DOI: 10.3390/biom13091283] [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: 06/07/2023] [Revised: 08/13/2023] [Accepted: 08/16/2023] [Indexed: 09/29/2023] Open
Abstract
The peptide-based pan-coronavirus fusion inhibitor EK1 is in phase III clinical trials, and it has, thus far, shown good clinical application prospects against SARS-CoV-2 and its variants. To further improve its in vivo long-acting property, we herein developed an Fc-binding strategy by conjugating EK1 with human immunoglobulin G Fc-binding peptide (IBP), which can exploit the long half-life advantage of IgG in vivo. The newly engineered peptide IBP-EK1 showed potent and broad-spectrum inhibitory activity against SARS-CoV-2 and its variants, including various Omicron sublineages and other human coronaviruses (HCoVs) with low cytotoxicity. In mouse models, IBP-EK1 possessed potent prophylactic and therapeutic efficacy against lethal HCoV-OC43 challenge, and it showed good safety profile and low immunogenicity. More importantly, IBP-EK1 exhibited a significantly extended in vivo half-life in rhesus monkeys of up to 37.7 h, which is about 20-fold longer than that reported for EK1. Strikingly, IBP-EK1 displayed strong in vitro or ex vivo synergistic anti-HCoV effect when combined with monoclonal neutralizing antibodies, including REGN10933 or S309, suggesting that IBP-conjugated EK1 can be further developed as a long-acting, broad-spectrum anti-HCoV agent, either alone or in combination with neutralizing antibodies, to combat the current COVID-19 pandemic or future outbreaks caused by emerging and re-emerging highly pathogenic HCoVs.
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Affiliation(s)
| | | | | | | | | | | | - Shibo Jiang
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Institute of Infectious Disease and Biosecurity, Shanghai Frontiers Science Center of Pathogenic Microbes and Infection, Fudan University, Shanghai 200032, China; (X.S.); (Z.H.); (W.X.); (Q.W.); (L.X.); (L.L.)
| | - Shuai Xia
- Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS), School of Basic Medical Sciences, Shanghai Institute of Infectious Disease and Biosecurity, Shanghai Frontiers Science Center of Pathogenic Microbes and Infection, Fudan University, Shanghai 200032, China; (X.S.); (Z.H.); (W.X.); (Q.W.); (L.X.); (L.L.)
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12
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Jukič M, Kralj S, Kolarič A, Bren U. Design of Tetra-Peptide Ligands of Antibody Fc Regions Using In Silico Combinatorial Library Screening. Pharmaceuticals (Basel) 2023; 16:1170. [PMID: 37631085 PMCID: PMC10459493 DOI: 10.3390/ph16081170] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/09/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023] Open
Abstract
Peptides, or short chains of amino-acid residues, are becoming increasingly important as active ingredients of drugs and as crucial probes and/or tools in medical, biotechnological, and pharmaceutical research. Situated at the interface between small molecules and larger macromolecular systems, they pose a difficult challenge for computational methods. We report an in silico peptide library generation and prioritization workflow using CmDock for identifying tetrapeptide ligands that bind to Fc regions of antibodies that is analogous to known in vitro recombinant peptide libraries' display and expression systems. The results of our in silico study are in accordance with existing scientific literature on in vitro peptides that bind to antibody Fc regions. In addition, we postulate an evolving in silico library design workflow that will help circumvent the combinatorial problem of in vitro comprehensive peptide libraries by focusing on peptide subunits that exhibit favorable interaction profiles in initial in silico peptide generation and testing.
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Affiliation(s)
- Marko Jukič
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
- Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška ulica 8, SI-6000 Koper, Slovenia
- Institute of Environmental Protection and Sensors, Beloruska ulica 7, SI-2000 Maribor, Slovenia
| | - Sebastjan Kralj
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Anja Kolarič
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
- Institute of Environmental Protection and Sensors, Beloruska ulica 7, SI-2000 Maribor, Slovenia
| | - Urban Bren
- Laboratory of Physical Chemistry and Chemical Thermodynamics, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, SI-2000 Maribor, Slovenia
- Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška ulica 8, SI-6000 Koper, Slovenia
- Institute of Environmental Protection and Sensors, Beloruska ulica 7, SI-2000 Maribor, Slovenia
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13
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Nethi SK, Li X, Bhatnagar S, Prabha S. Enhancing Anticancer Efficacy of Chemotherapeutics Using Targeting Ligand-Functionalized Synthetic Antigen Receptor-Mesenchymal Stem Cells. Pharmaceutics 2023; 15:1742. [PMID: 37376189 DOI: 10.3390/pharmaceutics15061742] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 06/08/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
Mesenchymal stem cells (MSCs) have been studied for their potential in facilitating tumor-targeted delivery of chemotherapeutics due to their tumor-homing characteristics. We hypothesized that targeting effectiveness of MSCs can be further enhanced by incorporating tumor-targeting ligands on MSC surfaces that will allow for enhanced arrest and binding within the tumor tissue. We utilized a unique strategy of modifying MSCs with synthetic antigen receptors (SARs), targeting specific antigens overexpressed on cancer cells. MSCs were surface-functionalized by first incorporating recombinant protein G (PG) on the surface, followed by binding of the targeting antibody to the PG handle. We functionalized MSCs with antibodies targeting a tyrosine kinase transmembrane receptor protein, epidermal growth factor receptor (EGFR), overexpressed in non-small-cell lung cancer (NSCLC). The efficacy of MSCs functionalized with anti-EGFR antibodies (cetuximab and D8) was determined in murine models of NSCLC. Cetuximab-functionalized MSCs demonstrated improved binding to EGFR protein and to EGFR overexpressing A549 lung adenocarcinoma cells. Further, cetuximab-functionalized MSCs loaded with paclitaxel nanoparticles were efficient in slowing orthotopic A549 tumor growth and improving the overall survival relative to that of other controls. Biodistribution studies revealed a six-fold higher retention of EGFR-targeted MSCs than non-targeted MSCs. Based on these results, we conclude that targeting ligand functionalization could be used to enhance the concentration of therapeutic MSC constructs at the tumor tissue and to achieve improved antitumor response.
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Affiliation(s)
- Susheel Kumar Nethi
- Fels Cancer Institute for Personalized Medicine, Lewis-Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Xiaolei Li
- Fels Cancer Institute for Personalized Medicine, Lewis-Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | | | - Swayam Prabha
- Fels Cancer Institute for Personalized Medicine, Lewis-Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
- Department of Cancer and Cellular Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
- Molecular Therapeutics Program, Fox Chase Cancer Center, Temple University, Philadelphia, PA 19111, USA
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14
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Kowalczyk A, Gajda-Walczak A, Ruzycka-Ayoush M, Targonska A, Mosieniak G, Glogowski M, Szumera-Cieckiewicz A, Prochorec-Sobieszek M, Bamburowicz-Klimkowska M, Nowicka AM, Grudzinski IP. Parallel SPR and QCM-D Quantitative Analysis of CD9, CD63, and CD81 Tetraspanins: A Simple and Sensitive Way to Determine the Concentration of Extracellular Vesicles Isolated from Human Lung Cancer Cells. Anal Chem 2023. [PMID: 37307147 DOI: 10.1021/acs.analchem.3c00772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Tetraspanins, including CD9, CD63, and CD81, are transmembrane biomarkers that play a crucial role in regulating cancer cell proliferation, invasion, and metastasis, as well as plasma membrane dynamics and protein trafficking. In this study, we developed simple, fast, and sensitive immunosensors to determine the concentration of extracellular vesicles (EVs) isolated from human lung cancer cells using tetraspanins as biomarkers. We employed surface plasmon resonance (SPR) and quartz crystal microbalance with dissipation (QCM-D) as detectors. The monoclonal antibodies targeting CD9, CD63, and CD81 were oriented vertically in the receptor layer using either a protein A sensor chip (SPR) or a cysteamine layer that modified the gold crystal (QCM-D) without the use of amplifiers. The SPR studies demonstrated that the interaction of EVs with antibodies could be described by the two-state reaction model. Furthermore, the EVs' affinity to monoclonal antibodies against tetraspanins decreased in the following order: CD9, CD63, and CD81, as confirmed by the QCM-D studies. The results indicated that the developed immunosensors were characterized by high stability, a wide analytical range from 6.1 × 104 particles·mL-1 to 6.1 × 107 particles·mL-1, and a low detection limit (0.6-1.8) × 104 particles·mL-1. A very good agreement between the results obtained using the SPR and QCM-D detectors and nanoparticle tracking analysis demonstrated that the developed immunosensors could be successfully applied to clinical samples.
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Affiliation(s)
- Agata Kowalczyk
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Warsaw, Pasteura Street 1, PL-02-093 Warsaw, Poland
| | - Aleksandra Gajda-Walczak
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Warsaw, Pasteura Street 1, PL-02-093 Warsaw, Poland
| | - Monika Ruzycka-Ayoush
- Department of Toxicology and Food Science, Faculty of Pharmacy, Medical University of Warsaw, Banacha Streer 1, PL-02-097 Warsaw, Poland
| | - Alicja Targonska
- Laboratory of Molecular Bases of Ageing, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Pasteura Street 3, PL-02-093 Warsaw, Poland
| | - Grazyna Mosieniak
- Laboratory of Molecular Bases of Ageing, Nencki Institute of Experimental Biology, Polish Academy of Sciences, Pasteura Street 3, PL-02-093 Warsaw, Poland
| | - Maciej Glogowski
- Department of Lung Cancer and Chest Tumors, Maria Sklodowska-Curie National Research Institute of Oncology, Roentgena Street 5, PL-02-781 Warsaw, Poland
| | - Anna Szumera-Cieckiewicz
- Department of Cancer Pathomorphology, Maria Sklodowska-Curie National Research Institute of Oncology, Roentgena Street 5, PL-02-781 Warsaw, Poland
| | - Monika Prochorec-Sobieszek
- Department of Cancer Pathomorphology, Maria Sklodowska-Curie National Research Institute of Oncology, Roentgena Street 5, PL-02-781 Warsaw, Poland
| | - Magdalena Bamburowicz-Klimkowska
- Department of Toxicology and Food Science, Faculty of Pharmacy, Medical University of Warsaw, Banacha Streer 1, PL-02-097 Warsaw, Poland
| | - Anna M Nowicka
- Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, University of Warsaw, Pasteura Street 1, PL-02-093 Warsaw, Poland
| | - Ireneusz P Grudzinski
- Department of Toxicology and Food Science, Faculty of Pharmacy, Medical University of Warsaw, Banacha Streer 1, PL-02-097 Warsaw, Poland
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15
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Qerqez AN, Silva RP, Maynard JA. Outsmarting Pathogens with Antibody Engineering. Annu Rev Chem Biomol Eng 2023; 14:217-241. [PMID: 36917814 PMCID: PMC10330301 DOI: 10.1146/annurev-chembioeng-101121-084508] [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] [Indexed: 03/16/2023]
Abstract
There is growing interest in identifying antibodies that protect against infectious diseases, especially for high-risk individuals and pathogens for which no vaccine is yet available. However, pathogens that manifest as opportunistic or latent infections express complex arrays of virulence-associated proteins and are adept at avoiding immune responses. Some pathogens have developed strategies to selectively destroy antibodies, whereas others create decoy epitopes that trick the host immune system into generating antibodies that are at best nonprotective and at worst enhance pathogenesis. Antibody engineering strategies can thwart these efforts by accessing conserved neutralizing epitopes, generating Fc domains that resist capture or degradation and even accessing pathogens hidden inside cells. Design of pathogen-resistant antibodies can enhance protection and guide development of vaccine immunogens against these complex pathogens. Here, we discuss general strategies for design of antibodies resistant to specific pathogen defense mechanisms.
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Affiliation(s)
- Ahlam N Qerqez
- Department of Chemical Engineering, The University of Texas, Austin, Texas, USA;
| | - Rui P Silva
- Department of Molecular Biosciences, The University of Texas, Austin, Texas, USA
| | - Jennifer A Maynard
- Department of Chemical Engineering, The University of Texas, Austin, Texas, USA;
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16
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Zhu C, Han H, Chen Z, Shen Y, Zhang Q, Bao C, Qu JH, Wang Q, Jiang Z. Tetrapeptide-based mimotope affinity monolith for the enrichment and analysis of anti-HER2 antibody and antibody-drug conjugate. Anal Chim Acta 2023; 1246:340892. [PMID: 36764776 DOI: 10.1016/j.aca.2023.340892] [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: 10/22/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Selective enrichment and analysis of therapeutic antibodies in biological fluids are crucial for the development of biopharmaceuticals. Recently, peptide-based affinity chromatography has exhibited fascinating prospects for antibody enrichment due to the high affinity and specificity of small peptides. However, the post-modification approach of peptide ligands on the material surface is complicated and time-consuming. In this study, a methacrylate modified tetrapeptide (m-EDPW) was firstly demonstrated as the affinity ligand of trastuzumab (Kd = 1.91 ± 1.81 μM). Next, the m-EDPW based affinity monolith was prepared using a facile one-step polymerization method, which could overcome the drawbacks of traditional post-modification preparation strategies. Based on the monolith as described above, a simple enrichment approach was developed under the optimal washing and elution conditions. Based on the excellent properties, such as high porosity (53.09%), weak electrostatic interaction and suitable affinity (1.00 ± 2.14 μM for anti-HER2 ADC), this novel monolith exhibited good specificity and recovery for antibodies (91.6% for trastuzumab, 98.37% for anti-HER2 ADC), and low nonspecific adsorption for human serum albumin (DBC10% = 0.5 mg/g polymer). Particularly, this material was successfully applied to enrich trastuzumab and its related antibody-drug conjugate (ADC) from different cell culture medias. The dynamic tracking analysis of ADC in the critical quality attributes (e.g., charge variants, drug to antibody ratio and subunit conjugation ratio) was also achieved by combining the enrichment approach, capillary electrophoresis or reversed phase liquid chromatography. In summary, the exploited peptide-based mimotope affinity materials showed a great potential for the application in biopharmaceutical analysis.
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Affiliation(s)
- Chendi Zhu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Hai Han
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Zhiwei Chen
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Yuan Shen
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Qiaoxuan Zhang
- Department of Laboratory Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, China
| | - Cai Bao
- Bio-Thera Solutions, Ltd., Guangzhou, 510700, China
| | - Jia-Huan Qu
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China
| | - Qiqin Wang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China.
| | - Zhengjin Jiang
- Institute of Traditional Chinese Medicine & Natural Products, College of Pharmacy/Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou, 510632, China.
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17
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Antibody Immobilization. Methods Mol Biol 2023; 2612:33-44. [PMID: 36795357 DOI: 10.1007/978-1-0716-2903-1_3] [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: 02/17/2023]
Abstract
In the ELISA format(s), the capture antibody is usually affixed to a solid phase, commonly referred to as the immunosorbent. How to tether the antibody most effectively will depend upon the physical properties of the support (plate well, latex bead, flow cell, etc.) as well as its chemical nature (hydrophobic, hydrophilic, the presence of reactive groups such as epoxide, etc.). Of course, it is ultimately the suitability of the antibody to withstand the linking process while preserving its antigen-binding efficiency that must be determined. In this chapter, the antibody immobilization processes and their consequences are described.
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18
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Nifontova G, Petrova I, Gerasimovich E, Konopsky VN, Ayadi N, Charlier C, Fleury F, Karaulov A, Sukhanova A, Nabiev I. Label-Free Multiplexed Microfluidic Analysis of Protein Interactions Based on Photonic Crystal Surface Mode Imaging. Int J Mol Sci 2023; 24:ijms24054347. [PMID: 36901779 PMCID: PMC10002048 DOI: 10.3390/ijms24054347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 02/16/2023] [Accepted: 02/20/2023] [Indexed: 02/24/2023] Open
Abstract
High-throughput protein assays are crucial for modern diagnostics, drug discovery, proteomics, and other fields of biology and medicine. It allows simultaneous detection of hundreds of analytes and miniaturization of both fabrication and analytical procedures. Photonic crystal surface mode (PC SM) imaging is an effective alternative to surface plasmon resonance (SPR) imaging used in conventional gold-coated, label-free biosensors. PC SM imaging is advantageous as a quick, label-free, and reproducible technique for multiplexed analysis of biomolecular interactions. PC SM sensors are characterized by a longer signal propagation at the cost of a lower spatial resolution, which makes them more sensitive than classical SPR imaging sensors. We describe an approach for designing label-free protein biosensing assays employing PC SM imaging in the microfluidic mode. Label-free, real-time detection of PC SM imaging biosensors using two-dimensional imaging of binding events has been designed to study arrays of model proteins (antibodies, immunoglobulin G-binding proteins, serum proteins, and DNA repair proteins) at 96 points prepared by automated spotting. The data prove feasibility of simultaneous PC SM imaging of multiple protein interactions. The results pave the way to further develop PC SM imaging as an advanced label-free microfluidic assay for the multiplexed detection of protein interactions.
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Affiliation(s)
- Galina Nifontova
- Laboratoire de Recherche en Nanosciences, LRN-EA4682, Structure Fédérative de Recherche Cap Santé, UFR de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France
| | - Irina Petrova
- Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, 115522 Moscow, Russia
| | - Evgeniia Gerasimovich
- Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, 115522 Moscow, Russia
| | | | - Nizar Ayadi
- DNA Repair Groupe, CNRS UMR 6286, US2B, Nantes Université, 44000 Nantes, France
| | - Cathy Charlier
- IMPACT Platform “Interactions Moléculaires Puces ACTivités”, UMR CNRS 6286 UFIP, Université de Nantes, 44000 Nantes, France
| | - Fabrice Fleury
- DNA Repair Groupe, CNRS UMR 6286, US2B, Nantes Université, 44000 Nantes, France
| | - Alexander Karaulov
- Department of Clinical Immunology and Allergology, Institute of Molecular Medicine, Sechenov First Moscow State Medical University (Sechenov University), 119146 Moscow, Russia
| | - Alyona Sukhanova
- Laboratoire de Recherche en Nanosciences, LRN-EA4682, Structure Fédérative de Recherche Cap Santé, UFR de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France
- Correspondence: (A.S.); (I.N.)
| | - Igor Nabiev
- Laboratoire de Recherche en Nanosciences, LRN-EA4682, Structure Fédérative de Recherche Cap Santé, UFR de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France
- Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, National Research Nuclear University MEPhI, 115522 Moscow, Russia
- Department of Clinical Immunology and Allergology, Institute of Molecular Medicine, Sechenov First Moscow State Medical University (Sechenov University), 119146 Moscow, Russia
- Correspondence: (A.S.); (I.N.)
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19
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Kim SG, Kim J, Kim MY, Park JM, Jose J, Park M. Autodisplay of streptococcal protein G for construction of an orientation-controlled immunoaffinity layer. Analyst 2023; 148:742-751. [PMID: 36692311 DOI: 10.1039/d2an01753a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An immunoaffinity layer with orientation-controlled antibodies was constructed to express streptococcal protein G in Escherichia coli cells using autodisplay technology. The sequence of protein G, a specific IgG-binding protein, was inserted into the autodisplay vector using recombinant technology and the constructed plasmid vector was transformed into E. coli cells. Protein G was confirmed to be autodisplayed with a high density of 2 × 105 copies per cell by SDS-PAGE analysis, and its IgG-binding affinity was confirmed by fluorescence microscopy. Autodisplayed protein G showed higher affinity than the IgG-binding Z-domain for goat IgG. Immunoassays based on E. coli cells were established to detect horseradish peroxidase (HRP) and C-reactive protein (CRP). Protein G autodisplaying E. coli cells were utilized as a solid support and immunoassays showed improved sensitivity by orientation control of autodisplayed protein G. The outer membrane (OM) of protein G autodisplaying E. coli was isolated and layered to construct an immunoaffinity layer. The OM was coated on a microplate to perform the immunoassays, which showed limits of detection of 5 and 0.2 ng mL-1 for HRP and CRP, respectively. An OM layer with autodisplayed protein G was applied as the immunoaffinity layer of a surface plasmon resonance (SPR) biosensor. After CRP detection, the SPR responses showed good linearity, with an R2 value of 0.99. The immunoaffinity layer with orientation control by autodisplayed protein G was confirmed to be applicable in immunoassays and immunosensors to improve sensitivity.
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Affiliation(s)
- Seong Gi Kim
- Major in Materials Science and Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea. .,Integrative Materials Research Institute, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea.,Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea
| | - JeeYoung Kim
- Major in Materials Science and Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea. .,Integrative Materials Research Institute, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea.,Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea
| | - Mi Yeon Kim
- Major in Materials Science and Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea. .,Integrative Materials Research Institute, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea.,Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea
| | - Jong-Min Park
- Major in Materials Science and Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea. .,Integrative Materials Research Institute, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea.,Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea
| | - Joachim Jose
- Institute of Pharmaceutical and Medicinal Chemistry, PharmaCampus, Westfälische Wilhelms-Universität, 48 Corrensstraβe, Münster, 48149, Germany
| | - Min Park
- Major in Materials Science and Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea. .,Integrative Materials Research Institute, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea.,Interdisciplinary Program of Nano-Medical Device Engineering, Hallym University, 1 Hallymdaehak-gil, Chuncheon-si, Gangwon-do, 24252, Republic of Korea
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20
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Obozina AS, Komedchikova EN, Kolesnikova OA, Iureva AM, Kovalenko VL, Zavalko FA, Rozhnikova TV, Tereshina ED, Mochalova EN, Shipunova VO. Genetically Encoded Self-Assembling Protein Nanoparticles for the Targeted Delivery In Vitro and In Vivo. Pharmaceutics 2023; 15:231. [PMID: 36678860 PMCID: PMC9861179 DOI: 10.3390/pharmaceutics15010231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/30/2022] [Accepted: 01/05/2023] [Indexed: 01/13/2023] Open
Abstract
Targeted nanoparticles of different origins are considered as new-generation diagnostic and therapeutic tools. However, there are no targeted drug formulations within the composition of nanoparticles approved by the FDA for use in the clinic, which is associated with the insufficient effectiveness of the developed candidates, the difficulties of their biotechnological production, and inadequate batch-to-batch reproducibility. Targeted protein self-assembling nanoparticles circumvent this problem since proteins are encoded in DNA and the final protein product is produced in only one possible way. We believe that the combination of the endless biomedical potential of protein carriers as nanoparticles and the standardized protein purification protocols will make significant progress in "magic bullet" creation possible, bringing modern biomedicine to a new level. In this review, we are focused on the currently existing platforms for targeted self-assembling protein nanoparticles based on transferrin, lactoferrin, casein, lumazine synthase, albumin, ferritin, and encapsulin proteins, as well as on proteins from magnetosomes and virus-like particles. The applications of these self-assembling proteins for targeted delivery in vitro and in vivo are thoroughly discussed, including bioimaging applications and different therapeutic approaches, such as chemotherapy, gene delivery, and photodynamic and photothermal therapy. A critical assessment of these protein platforms' efficacy in biomedicine is provided and possible problems associated with their further development are described.
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Affiliation(s)
| | | | | | - Anna M. Iureva
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Vera L. Kovalenko
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Fedor A. Zavalko
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | | | | | - Elizaveta N. Mochalova
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
- Nanobiomedicine Division, Sirius University of Science and Technology, 354340 Sochi, Russia
| | - Victoria O. Shipunova
- Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
- Nanobiomedicine Division, Sirius University of Science and Technology, 354340 Sochi, Russia
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21
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IgG Fc Affinity Ligands and Their Applications in Antibody-Involved Drug Delivery: A Brief Review. Pharmaceutics 2023; 15:pharmaceutics15010187. [PMID: 36678816 PMCID: PMC9862274 DOI: 10.3390/pharmaceutics15010187] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 12/30/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023] Open
Abstract
Antibodies are not only an important class of biotherapeutic drugs, but also are targeting moieties for achieving active targeting drug delivery. Meanwhile, the rapidly increasing application of antibodies and Fc-fusion proteins has inspired the emerging development of downstream processing technologies. Thus, IgG Fc affinity ligands have come into being and have been widely exploited in antibody purification strategies. Given the high binding affinity and specificity to IgGs, binding stability in physiological medium conditions, and favorable toxicity and immunogenicity profiles, Fc affinity ligands are gradually applied to antibody delivery, non-covalent antibody-drug conjugates or antibody-mediated active-targeted drug delivery systems. In this review, we will briefly introduce IgG affinity ligands that are widely used at present and summarize their diverse applications in the field of antibody-involved drug delivery. The challenges and outlook of these systems are also discussed.
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22
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Tramontano C, Martins JP, De Stefano L, Kemell M, Correia A, Terracciano M, Borbone N, Rea I, Santos HA. Microfluidic-Assisted Production of Gastro-Resistant Active-Targeted Diatomite Nanoparticles for the Local Release of Galunisertib in Metastatic Colorectal Cancer Cells. Adv Healthc Mater 2023; 12:e2202672. [PMID: 36459471 DOI: 10.1002/adhm.202202672] [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: 10/16/2022] [Revised: 11/17/2022] [Indexed: 12/03/2022]
Abstract
The oral route is highly desirable for colorectal cancer (CRC) treatment because it allows concentrating the drug in the colon and achieving a localized effect. However, orally administered drugs are often metabolized in the liver, resulting in reduced efficacy and the need for higher doses. Nanoparticle-based drug delivery systems can be engineered to prevent the diffusion of the drug in the stomach, addressing the release at the target site, and enhancing the efficacy of the delivered drug. Here, an orally administrable galunisertib delivery system is developed with gelatin-covered diatomite nanoparticles targeting the ligand 1-cell adhesion molecule (L1-CAM) on metastatic cells, and further encapsulated in an enteric matrix by microfluidics. The gastro-resistant polymer protects the nanoparticles from the action of the digestive enzymes and allows for a sustained release of galunisertib at the intestinal pH. The efficacy of antibody-antigen interactions to drive the internalization of nanoparticles in the targeted cells is investigated in CRC cells expressing abnormal (SW620) or basal levels (Caco-2, HT29-MTX) of L1-CAM. The combination of local drug release and active targeting enhances the effect of the delivered galunisertib, which inhibits the migration of the SW620 cells with greater efficiency compared to the free drug.
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Affiliation(s)
- Chiara Tramontano
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, Naples, 80131, Italy.,Department of Pharmacy, University of Naples Federico II, Naples, 80131, Italy
| | - João Pedro Martins
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Luca De Stefano
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, Naples, 80131, Italy
| | - Marianna Kemell
- Department of Chemistry, University of Helsinki, Helsinki, FI-00014, Finland
| | - Alexandra Correia
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland
| | - Monica Terracciano
- Department of Pharmacy, University of Naples Federico II, Naples, 80131, Italy
| | - Nicola Borbone
- Department of Pharmacy, University of Naples Federico II, Naples, 80131, Italy
| | - Ilaria Rea
- Institute of Applied Sciences and Intelligent Systems, Unit of Naples, National Research Council, Naples, 80131, Italy
| | - Hélder A Santos
- Drug Research Program, Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, FI-00014, Finland.,Department of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Groningen, 9713 AV, The Netherlands.,W.J. Kolff Institute for Biomedical Engineering and Materials Science, University Medical Center Groningen, University of Groningen, Groningen, 9713 AV, The Netherlands
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23
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Development of an Antibody Delivery Method for Cancer Treatment by Combining Ultrasound with Therapeutic Antibody-Modified Nanobubbles Using Fc-Binding Polypeptide. Pharmaceutics 2022; 15:pharmaceutics15010130. [PMID: 36678759 PMCID: PMC9861716 DOI: 10.3390/pharmaceutics15010130] [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: 11/29/2022] [Revised: 12/17/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
A key challenge in treating solid tumors is that the tumor microenvironment often inhibits the penetration of therapeutic antibodies into the tumor, leading to reduced therapeutic efficiency. It has been reported that the combination of ultrasound-responsive micro/nanobubble and therapeutic ultrasound (TUS) enhances the tissue permeability and increases the efficiency of delivery of macromolecular drugs to target tissues. In this study, to facilitate efficient therapeutic antibody delivery to tumors using this combination system, we developed therapeutic antibody-modified nanobubble (NBs) using an Fc-binding polypeptide that can quickly load antibodies to nanocarriers; since the polypeptide was derived from Protein G. TUS exposure to this Herceptin®-modified NBs (Her-NBs) was followed by evaluation of the antibody's own ADCC activity, resulting the retained activity. Moreover, the utility of combining therapeutic antibody-modified NBs and TUS exposure as an antibody delivery system for cancer therapy was assessed in vivo. The Her-NBs + TUS group had a higher inhibitory effect than the Herceptin and Her-NBs groups. Overall, these results suggest that the combination of therapeutic antibody-modified NBs and TUS exposure can enable efficient antibody drug delivery to tumors, while retaining the original antibody activity. Hence, this system has the potential to maximize the therapeutic effects in antibody therapy for solid cancers.
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24
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Puumala LS, Grist SM, Morales JM, Bickford JR, Chrostowski L, Shekhar S, Cheung KC. Biofunctionalization of Multiplexed Silicon Photonic Biosensors. BIOSENSORS 2022; 13:53. [PMID: 36671887 PMCID: PMC9855810 DOI: 10.3390/bios13010053] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/10/2022] [Accepted: 12/23/2022] [Indexed: 05/28/2023]
Abstract
Silicon photonic (SiP) sensors offer a promising platform for robust and low-cost decentralized diagnostics due to their high scalability, low limit of detection, and ability to integrate multiple sensors for multiplexed analyte detection. Their CMOS-compatible fabrication enables chip-scale miniaturization, high scalability, and low-cost mass production. Sensitive, specific detection with silicon photonic sensors is afforded through biofunctionalization of the sensor surface; consequently, this functionalization chemistry is inextricably linked to sensor performance. In this review, we first highlight the biofunctionalization needs for SiP biosensors, including sensitivity, specificity, cost, shelf-stability, and replicability and establish a set of performance criteria. We then benchmark biofunctionalization strategies for SiP biosensors against these criteria, organizing the review around three key aspects: bioreceptor selection, immobilization strategies, and patterning techniques. First, we evaluate bioreceptors, including antibodies, aptamers, nucleic acid probes, molecularly imprinted polymers, peptides, glycans, and lectins. We then compare adsorption, bioaffinity, and covalent chemistries for immobilizing bioreceptors on SiP surfaces. Finally, we compare biopatterning techniques for spatially controlling and multiplexing the biofunctionalization of SiP sensors, including microcontact printing, pin- and pipette-based spotting, microfluidic patterning in channels, inkjet printing, and microfluidic probes.
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Affiliation(s)
- Lauren S. Puumala
- School of Biomedical Engineering, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
| | - Samantha M. Grist
- School of Biomedical Engineering, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Dream Photonics Inc., Vancouver, BC V6T 0A7, Canada
| | - Jennifer M. Morales
- Army Research Laboratory, US Army Combat Capabilities Development Command, 2800 Powder Mill Rd., Adelphi, MD 20783, USA
| | - Justin R. Bickford
- Army Research Laboratory, US Army Combat Capabilities Development Command, 2800 Powder Mill Rd., Adelphi, MD 20783, USA
| | - Lukas Chrostowski
- Dream Photonics Inc., Vancouver, BC V6T 0A7, Canada
- Department of Electrical and Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, BC V6T 1Z4, Canada
- Stewart Blusson Quantum Matter Institute, University of British Columbia, 2355 East Mall, Vancouver, BC V6T 1Z4, Canada
| | - Sudip Shekhar
- Dream Photonics Inc., Vancouver, BC V6T 0A7, Canada
- Department of Electrical and Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, BC V6T 1Z4, Canada
| | - Karen C. Cheung
- School of Biomedical Engineering, University of British Columbia, 2222 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Centre for Blood Research, University of British Columbia, 2350 Health Sciences Mall, Vancouver, BC V6T 1Z3, Canada
- Department of Electrical and Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, BC V6T 1Z4, Canada
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25
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Capkin E, Kurt H, Gurel B, Bicak D, Akgun Bas S, Daglikoca DE, Yuce M. Characterization of FcγRIa (CD64) as a Ligand Molecule for Site-Specific IgG1 Capture: A Side-By-Side Comparison with Protein A. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:14623-14634. [PMID: 36416530 PMCID: PMC9730901 DOI: 10.1021/acs.langmuir.2c02022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 11/12/2022] [Indexed: 06/16/2023]
Abstract
Fc γ receptors (FcγRs) are one of the structures that can initiate effector function for monoclonal antibodies. FcγRIa has the highest affinity toward IgG1-type monoclonal antibodies among all FcγRs. In this study, a comprehensive characterization was performed for FcγRIa as a potential affinity ligand for IgG1-type monoclonal antibody binding. The binding interactions were assessed with the SPR technique using different immobilization techniques such as EDC-NHS coupling, streptavidin-biotin interaction, and His-tagged FcγRIa capture. The His-tagged FcγRIa capture was the most convenient method based on assay repeatability. Next, a crude IgG1 sample and its fractions with different monomer contents obtained from protein A affinity chromatography were used to evaluate FcγRIa protein in terms of monoclonal antibody binding capacity. The samples were also compared with a protein A-immobilized chip (a frequently used affinity ligand) for IgG1 binding responses. The antibody binding capacity of the protein A-immobilized chip surface was significantly better than that of the FcγRIa-immobilized chip surface due to its 5 Ig binding domains. The antibody binding responses changed similarly with protein A depending on the monomer content of the sample. Finally, a different configuration was used to assess the binding affinity of free FcγRs (FcγRIa, FcγRIIa, and FcγRIIIa) to three different immobilized IgGs by immobilizing protein L to the chip surface. Unlike previous immobilization techniques tested where the FcγRIa was utilized as a ligand, nonimmobilized or free FcγRIa resulted in a significantly higher antibody binding response than free protein A. In this configuration, kinetics data of FcγRI revealed that the association rate (ka 50-80 × 105 M-1 s-1) increased in comparison to His capture method (1.9-2.4 × 105 M-1 s-1). In addition, the dissociation rate (kd 10-5 s-1) seemed slower over the His capture method (10-4 s-1) and provided stability on the chip surface during the dissociation phase. The KD values for FcγRIa were found in the picomolar range (2.1-10.33 pM from steady-state affinity analysis and 37.5-46.2 pM from kinetic analysis) for IgG1-type antibodies. FcγRIa possesses comparable ligand potential as well as protein A. Even though the protein A-immobilized surface bound more antibodies than the FcγRIa-captured surface, FcγRIa presented a significant antibody binding capacity in protein L configuration. The results suggest FcγRIa protein as a potential ligand for site-oriented immobilization of IgG1-type monoclonal antibodies, and it needs further performance investigation on different surfaces and interfaces for applications such as sensing and antibody purification.
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Affiliation(s)
- Eda Capkin
- Faculty
of Engineering and Natural Sciences, Sabanci
University, Tuzla 34956, Istanbul, Turkey
| | - Hasan Kurt
- School
of Engineering and Natural Sciences, Istanbul
Medipol University, Beykoz 34810, Istanbul, Turkey
- SABITA
Research Institute for Health Sciences and Technologies, Istanbul Medipol University, Beykoz 34810, Istanbul, Turkey
- Nanosolar
Plasmonics Ltd., Gebze 41400, Kocaeli, Turkey
| | - Busra Gurel
- SUNUM
Nanotechnology Research and Application Center, Sabanci University, Tuzla 34956, Istanbul, Turkey
| | - Dilan Bicak
- ILKO ARGEM
Biotechnology R&D Center, Pendik 34906, Istanbul, Turkey
| | - Sibel Akgun Bas
- ILKO ARGEM
Biotechnology R&D Center, Pendik 34906, Istanbul, Turkey
| | | | - Meral Yuce
- SUNUM
Nanotechnology Research and Application Center, Sabanci University, Tuzla 34956, Istanbul, Turkey
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26
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Goncalves AG, Hartzell EJ, Sullivan MO, Chen W. Recombinant protein polymer-antibody conjugates for applications in nanotechnology and biomedicine. Adv Drug Deliv Rev 2022; 191:114570. [PMID: 36228897 DOI: 10.1016/j.addr.2022.114570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 09/03/2022] [Accepted: 10/04/2022] [Indexed: 01/24/2023]
Abstract
Currently, there are over 100 antibody-based therapeutics on the market for the treatment of various diseases. The increasing importance of antibody treatment is further highlighted by the recent FDA emergency use authorization of certain antibody therapies for COVID-19 treatment. Protein-based materials have gained momentum for antibody delivery due to their biocompatibility, tunable chemistry, monodispersity, and straightforward synthesis and purification. In this review, we discuss progress in engineering the molecular features of protein-based biomaterials, in particular recombinant protein polymers, for introducing novel functionalities and enhancing the delivery properties of antibodies and related binding protein domains.
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Affiliation(s)
- Antonio G Goncalves
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, United States
| | - Emily J Hartzell
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, United States
| | - Millicent O Sullivan
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, United States.
| | - Wilfred Chen
- Department of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, United States.
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27
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Philip AA, Patton JT. Generation of Recombinant Rotaviruses Expressing Human Norovirus Capsid Proteins. J Virol 2022; 96:e0126222. [PMID: 36314817 PMCID: PMC9682992 DOI: 10.1128/jvi.01262-22] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/21/2022] [Indexed: 11/24/2022] Open
Abstract
Rotavirus, a segmented double-stranded RNA virus of the Reoviridae family, is a primary cause of acute gastroenteritis in young children. In countries where rotavirus vaccines are widely used, norovirus (NoV) has emerged as the major cause of acute gastroenteritis. Towards the goal of creating a combined rotavirus-NoV vaccine, we explored the possibility of generating recombinant rotaviruses (rRVs) expressing all or portions of the NoV GII.4 VP1 capsid protein. This was accomplished by replacing the segment 7 NSP3 open reading frame with a cassette encoding, sequentially, NSP3, a 2A stop-restart translation element, and all or portions (P, P2) of NoV VP1. In addition to successfully recovering rRVs with modified SA11 segment 7 RNAs encoding NoV capsid proteins, analogous rRVs were recovered through modification of the segment 7 RNA of the RIX4414 vaccine strain. An immunoblot assay confirmed that rRVs expressed NoV capsid proteins as independent products. Moreover, VP1 expressed by rRVs underwent dimerization and was recognized by conformational-dependent anti-VP1 antibodies. Serially passaged rRVs that expressed the NoV P and P2 were genetically stable, retaining additional sequences of up to 1.1 kbp without change. However, serially passaged rRVs containing the longer 1.6-kb VP1 sequence were less stable and gave rise to virus populations with segment 7 RNAs lacking VP1 coding sequences. Together, these studies suggest that it may be possible to develop combined rotavirus-NoV vaccines using modified segment 7 RNA to express NoV P or P2. In contrast, development of potential rotavirus-NoV vaccines expressing NoV VP1 will need additional efforts to improve genetic stability. IMPORTANCE Rotavirus (RV) and norovirus (NoV) are the two most important causes of acute viral gastroenteritis (AGE) in infants and young children. While the incidence of RV AGE has been brought under control in many countries through the introduction of universal mass vaccination with live attenuated RV vaccines, similar highly effective NoV vaccines are not available. To pursue the development of a combined RV-NoV vaccine, we examined the potential of using RV as an expression vector of all or portions of the NoV capsid protein VP1. Our results showed that by replacing the NSP3 open reading frame in RV genome segment 7 RNA with a coding cassette for NSP3, a 2A stop-restart translation element, and VP1, recombinant RVs can be generated that express NoV capsid proteins. These findings raise the possibility of developing new generations of RV-based combination vaccines that provide protection against a second enteric pathogen, such as NoV.
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Affiliation(s)
- Asha A. Philip
- Department of Biology, Indiana University, Bloomington, Indiana, USA
| | - John T. Patton
- Department of Biology, Indiana University, Bloomington, Indiana, USA
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28
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Tran T, Martinsson E, Vargas S, Lundström I, Mandenius CF, Aili D. Nanoplasmonic Avidity-Based Detection and Quantification of IgG Aggregates. Anal Chem 2022; 94:15754-15762. [DOI: 10.1021/acs.analchem.2c03446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Thuy Tran
- Laboratory of Molecular Materials, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | | | - Sergio Vargas
- Wolfram MathCore AB, Teknikringen 1E, Linköping 583 30, Sweden
| | - Ingemar Lundström
- Sensor and Actuator Systems, Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | - Carl-Fredrik Mandenius
- Biotechnology, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
| | - Daniel Aili
- Laboratory of Molecular Materials, Division of Biophysics and Bioengineering, Department of Physics, Chemistry and Biology, Linköping University, Linköping 581 83, Sweden
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29
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David S, Munteanu RE, Tițoiu AM, Petcu IC, Cernat IC, Leancu C, Gheorghiu M, Gheorghiu E. Direct, Rapid Detection of Pathogens from Urine Samples. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15217640. [PMID: 36363232 PMCID: PMC9656601 DOI: 10.3390/ma15217640] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 10/17/2022] [Accepted: 10/26/2022] [Indexed: 06/02/2023]
Abstract
The problem of rapidly detecting pathogens directly from clinical samples poses significant analytical challenges. Addressing this issue in relation to urinary tract infections, we propose an effective protocol and related immunomagnetic test kits enabling versatile screening for the presence of pathogenic bacteria in unprocessed urine samples. To achieve this, the components of a typical immunomagnetic separation protocol were optimized towards the sensitive assessment of the aggregates formed out of immunomagnetically tagged target pathogens collected from clinical samples. Specifically, a dedicated immunomagnetic material was developed via the functionalization of standardized, micron-sized magnetic beads with generic antibodies against gram-specific bacterial constituents with mannan binding lectin. As such, we demonstrate efficient procedures for achieving the enhanced, specific, and pathogen-mediated cluster formation of these tailored affinity-coated magnetic beads in complex samples. We further show how cluster analysis, in conjunction with the use of nonspecific, inexpensive fluorescent dye, allows for a straightforward optical assessment of the bacterial load directly from urine samples. The optimized sensing protocol and related kits provide, in less than 60 min, qualitative (positive/negative) information on the bacterial load with 85% specificity and 96% sensitivity, which is appropriate to empower clinical microscopy with a new analytic dimension. The procedure is prone to automation, can be conveniently used in clinical microbiology laboratories and, since it preserves the viability of the captured bacteria, can be interfaced with downstream analyses and antimicrobial susceptibility testing. Moreover, the study emphasizes a suite of practical validation assays that are useful for bringing the tool-box of immunomagnetic materials outside the academic laboratory and into real-life applications.
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Affiliation(s)
- Sorin David
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
| | - Raluca-Elena Munteanu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
- Faculty of Biology, University of Bucharest, Splaiul Independenței 91-95, 050095 Bucharest, Romania
| | - Ana-Maria Tițoiu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
| | - Ionela-Cristina Petcu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
| | - Ioana-Cristina Cernat
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
| | - Corina Leancu
- Laboratoarele SynLab, Bld. Tudor Vladimirescu nr.29, 050881 Bucharest, Romania
| | - Mihaela Gheorghiu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
- Faculty of Biology, University of Bucharest, Splaiul Independenței 91-95, 050095 Bucharest, Romania
| | - Eugen Gheorghiu
- International Centre of Biodynamics, Intrarea Portocalelor 1B, 060101 Bucharest, Romania
- Faculty of Biology, University of Bucharest, Splaiul Independenței 91-95, 050095 Bucharest, Romania
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30
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Badgujar SB, Rane AM, Palav AA, Kumar S, Dabholkar AP, Sawant SA, Tandale BU, Daftary SB, Sawant NP, Lala S. A simple scheme for large scale purification of urine - Derived Bence Jones Kappa protein. J Chromatogr B Analyt Technol Biomed Life Sci 2022; 1210:123452. [PMID: 36108402 DOI: 10.1016/j.jchromb.2022.123452] [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: 07/13/2022] [Revised: 09/02/2022] [Accepted: 09/03/2022] [Indexed: 10/31/2022]
Abstract
We have investigated and optimized purification process, suitable for industrial scale, to obtain high purity grade Bence Jones Kappa Protein ('BJK-Protein'), while preserving its physiological properties and functions. BJK-Protein was obtained from a biological waste product i.e. human urine of renal failure patients. Isolated 'BJK-Protein' was analyzed by electrophoresis, western blotting, double immunodiffusion, SEC-HPLC assay and Mass Spectrometry (MS). The relative molecular mass of 'BJK-Protein' is 23054.2 Da. Moreover, dimer forms of 'BJK-Protein' were also detected in SDS-PAGE and mass spectrum corresponding to 46054.4 Da. The results of western blotting, immunoelectrophoresis, SEC-HPLC assay, and mass spectrometry analysis indicate a high purity (>99 %) of 'BJK-Protein'. Peptide mass fingerprint analysis of 'BJK-Protein' yielded peptides that partially matches the known database sequences of kappa variable region (KV139_HUMAN) of immunoglobulin. This protein was found to be stable up to 20 months at 2-8 °C temperature and also found negative for major undesirable viral markers as well as bacterial endotoxin. With this purification approach, the cost of purified 'BJK-Protein' is significantly reduced as compared to the current market price of Kappa light chain available in international market.
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Affiliation(s)
- Shamkant B Badgujar
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India.
| | - Arti M Rane
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Aditi A Palav
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Saurabh Kumar
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Anil P Dabholkar
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Satish A Sawant
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Babasaheb U Tandale
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Siddharth B Daftary
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Narendra P Sawant
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
| | - Sanjeev Lala
- Laboratory of Native Antigens, Research and Development Division, Advy Chemical Private Limited, Thane 400604, Maharashtra, India
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31
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Bioaffinity-based surface immobilization of antibodies to capture endothelial colony-forming cells. PLoS One 2022; 17:e0269316. [PMID: 36040884 PMCID: PMC9426933 DOI: 10.1371/journal.pone.0269316] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 05/18/2022] [Indexed: 11/19/2022] Open
Abstract
Maximizing the re-endothelialization of vascular implants such as prostheses or stents has the potential to significantly improve their long-term performance. Endothelial progenitor cell capture stents with surface-immobilized antibodies show significantly improved endothelialization in the clinic. However, most current antibody-based stent surface modification strategies rely on antibody adsorption or direct conjugation via amino or carboxyl groups which leads to poor control over antibody surface concentration and/or molecular orientation, and ultimately bioavailability for cell capture. Here, we assess the utility of a bioaffinity-based surface modification strategy to immobilize antibodies targeting endothelial cell surface antigens. A cysteine-tagged truncated protein G polypeptide containing three Fc-binding domains was conjugated onto aminated polystyrene substrates via a bi-functional linking arm, followed by antibody immobilization. Different IgG antibodies were successfully immobilized on the protein G-modified surfaces. Covalent grafting of the protein G polypeptide was more effective than surface adsorption in immobilizing antibodies at high density based on fluorophore-labeled secondary antibody detection, as well as endothelial colony-forming cell capture through anti-CD144 antibodies. This work presents a potential avenue for enhancing the performance of cell capture strategies by using covalent grafting of protein G polypeptides to immobilize IgG antibodies.
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Lu H, Jin Y, Yang H, Tao Z, Chen J, Chen S, Feng Y, Xin H, Lu X. A trimeric immunoglobin G-binding domain outperforms recombinant protein G and protein L as a ligand for fragment antigen-binding purification. J Chromatogr A 2022; 1681:463464. [DOI: 10.1016/j.chroma.2022.463464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 11/25/2022]
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Emerging affinity ligands and support materials for the enrichment of monoclonal antibodies. Trends Analyt Chem 2022. [DOI: 10.1016/j.trac.2022.116744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Xue A, Fan S. Matrices and Affinity Ligands for Antibody Purification and Corresponding Applications in Radiotherapy. Biomolecules 2022; 12:biom12060821. [PMID: 35740946 PMCID: PMC9221399 DOI: 10.3390/biom12060821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/09/2022] [Accepted: 06/10/2022] [Indexed: 02/05/2023] Open
Abstract
Antibodies have become an important class of biological products in cancer treatments such as radiotherapy. The growing therapeutic applications have driven a demand for high-purity antibodies. Affinity chromatography with a high affinity and specificity has always been utilized to separate antibodies from complex mixtures. Quality chromatographic components (matrices and affinity ligands) have either been found or generated to increase the purity and yield of antibodies. More importantly, some matrices (mainly particles) and affinity ligands (including design protocols) for antibody purification can act as radiosensitizers or carriers for therapeutic radionuclides (or for radiosensitizers) either directly or indirectly to improve the therapeutic efficiency of radiotherapy. This paper provides a brief overview on the matrices and ligands used in affinity chromatography that are involved in antibody purification and emphasizes their applications in radiotherapy to enrich potential approaches for improving the efficacy of radiotherapy.
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Drozd M, Duszczyk A, Ivanova P, Pietrzak M. Interactions of proteins with metal-based nanoparticles from a point of view of analytical chemistry - Challenges and opportunities. Adv Colloid Interface Sci 2022; 304:102656. [PMID: 35367856 DOI: 10.1016/j.cis.2022.102656] [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: 12/29/2021] [Revised: 03/18/2022] [Accepted: 03/23/2022] [Indexed: 11/01/2022]
Abstract
Interactions of proteins with nanomaterials draw attention of many research groups interested in fundamental phenomena. However, alongside with valuable information regarding physicochemical aspects of such processes and their mechanisms, they more and more often prove to be useful from a point of view of bioanalytics. Deliberate use of processes based on adsorption of proteins on nanoparticles (or vice versa) allows for a development of new analytical methods and improvement of the existing ones. It also leads to obtaining of nanoparticles of desired properties and functionalities, which can be used as elements of analytical tools for various applications. Due to interactions with nanoparticles, proteins can also gain new functionalities or lose their interfering potential, which from perspective of bioanalytics seems to be very inviting and attractive. In the framework of this article we will discuss the bioanalytical potential of interactions of proteins with a chosen group of nanoparticles, and implementation of so driven processes for biosensing. Moreover, we will show both positive and negative (opportunities and challenges) aspects resulting from the presence of proteins in media/samples containing metal-based nanoparticles or their precursors.
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Simultaneous amplification of multiple immunofluorescence signals via cyclic staining of target molecules using mutually cross-adsorbed antibodies. Sci Rep 2022; 12:8780. [PMID: 35610501 PMCID: PMC9130514 DOI: 10.1038/s41598-022-12808-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 05/11/2022] [Indexed: 11/09/2022] Open
Abstract
Amplification of immunofluorescence (IF) signals is becoming increasingly critical in cancer research and neuroscience. Recently, we put forward a new signal amplification technique, which we termed fluorescent signal amplification via cyclic staining of target molecules (FRACTAL). FRACTAL amplifies IF signals by repeatedly labeling target proteins with a pair of secondary antibodies that bind to each other. However, simultaneous amplification of multiple IF signals via FRACTAL has not yet been demonstrated because of cross-reactivity between the secondary antibodies. In this study, we show that mutual cross-adsorption between antibodies can eliminate all forms of cross-reactions between them, enabling simultaneous amplification of multiple IF signals. First, we show that a typical cross-adsorption process-in which an antibody binds to proteins with potential cross-reactivity with the antibody-cannot eliminate cross-reactions between antibodies in FRACTAL. Next, we show that all secondary antibodies used in FRACTAL need to be mutually cross-adsorbed to eliminate all forms of cross-reactivity, and then we demonstrate simultaneous amplification of multiple IF signals using these antibodies. Finally, we show that multiplexed FRACTAL can be applied to expansion microscopy to achieve higher fluorescence intensities after expansion. Multiplexed FRACTAL is a highly versatile tool for standard laboratories, as it amplifies multiple IF signals without the need for custom antibodies.
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Hwang J, Jung Y, Moon S, Yu S, Oh H, Kim S, Kim KW, Yoon JH, Chun J, Kim SJ, Chung WJ, Kweon DH. Nanodisc-Mediated Conversion of Virustatic Antiviral Antibody to Disrupt Virus Envelope in Infected Cells. SMALL METHODS 2022; 6:e2101516. [PMID: 35107214 DOI: 10.1002/smtd.202101516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Many antibody-based antivirals, including broadly neutralizing antibodies (bnAbs) against various influenza virus strains, suffer from limited potency. A booster of the antiviral activity of an antibody is expected to facilitate development of antiviral therapeutics. In this study, a nanodisc (ND), a discoidal lipid bilayer encircled by membrane scaffold proteins, is engineered to provide virucidal properties to antibodies, thereby augmenting their antiviral activity. NDs carrying the Fc-binding peptide sequence form an antibody-ND complex (ANC), which can co-endocytose into cells infected with influenza virus. ANC efficiently inhibits endosome escape of viral RNA by dual complimentary mode of action. While the antibody moiety in an ANC inhibits hemagglutinin-mediated membrane fusion, its ND moiety destroys the viral envelope using free hemagglutinins that are not captured by antibodies. Providing virus-infected host cells with the ability to self-eliminate by the synergistic effect of ANC components dramatically amplifies the antiviral efficacy of a bnAb against influenza virus. When the efficacy of ANC is assessed in mouse models, administration of ANCs dramatically reduces morbidity and mortality compared to bnAb alone. This study is the first to demonstrate the novel nanoparticle ANC and its role in combating viral infections, suggesting that ANC is a versatile platform applicable to various viruses.
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Affiliation(s)
- Jaehyeon Hwang
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Younghun Jung
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Seokoh Moon
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Seokhyeon Yu
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hyunseok Oh
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Soomin Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Kyeong Won Kim
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jeong Hyeon Yoon
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jihwan Chun
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sang Jick Kim
- Synthetic Biology and Bioengineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Woo-Jae Chung
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Dae-Hyuk Kweon
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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Boero E, Cruz AR, Pansegrau W, Giovani C, Rooijakkers SHM, van Kessel KPM, van Strijp JAG, Bagnoli F, Manetti AGO. Natural Human Immunity Against Staphylococcal Protein A Relies on Effector Functions Triggered by IgG3. Front Immunol 2022; 13:834711. [PMID: 35359919 PMCID: PMC8963248 DOI: 10.3389/fimmu.2022.834711] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 02/17/2022] [Indexed: 12/02/2022] Open
Abstract
Staphylococcal protein A (SpA) is a multifunctional, highly conserved virulence factor of Staphylococcus aureus. By binding the Fc portion of all human IgG subclasses apart from IgG3, SpA interferes with antibody and complement deposition on the bacterial surface, impairing staphylococcal clearance by phagocytosis. Because of its anti-opsonic properties, SpA is not investigated as a surface antigen to mediate bacterial phagocytosis. Herein we investigate human sera for the presence of SpA-opsonizing antibodies. The screening revealed that sera containing IgG3 against SpA were able to correctly opsonize the target and drive Fcγ receptor-mediated interactions and phagocytosis. We demonstrated that IgG3 Fc is significantly more efficient in inducing phagocytosis of SpA-expressing S. aureus as compared to IgG1 Fc in an assay resembling physiological conditions. Furthermore, we show that the capacity of SpA antibodies to induce phagocytosis depends on the specific epitope recognized by the IgGs on SpA molecules. Overall, our results suggest that anti-SpA IgG3 antibodies could favor the anti-staphylococcal response in humans, paving the way towards the identification of a correlate of protection against staphylococcal infections.
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Affiliation(s)
- Elena Boero
- GSK, Siena, Italy
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Ana Rita Cruz
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | | | | | - Suzan H. M. Rooijakkers
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Kok P. M. van Kessel
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
| | - Jos A. G. van Strijp
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht University, Utrecht, Netherlands
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Sotnikov DV, Barshevskaya LV, Zherdev AV, Dzantiev BB. Conjugates of Immunoglobulin-Binding Protein and Gold Nanoparticle: Determination of Composition and Application in Immunochromatographic Analysis of Sulfonylamide. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822010082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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40
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Tontanahal A, Sperandio V, Kovbasnjuk O, Loos S, Kristoffersson AC, Karpman D, Arvidsson I. IgG Binds Escherichia coli Serine Protease EspP and Protects Mice From E. coli O157:H7 Infection. Front Immunol 2022; 13:807959. [PMID: 35250980 PMCID: PMC8894809 DOI: 10.3389/fimmu.2022.807959] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 01/31/2022] [Indexed: 12/05/2022] Open
Abstract
Shiga toxin-producing Escherichia coli O157:H7 is a virulent strain causing severe gastrointestinal infection, hemolytic uremic syndrome and death. To date there are no specific therapies to reduce progression of disease. Here we investigated the effect of pooled immunoglobulins (IgG) on the course of disease in a mouse model of intragastric E. coli O157:H7 inoculation. Intraperitoneal administration of murine IgG on day 3, or both on day 3 and 6, post-inoculation improved survival and decreased intestinal and renal pathology. When given on both day 3 and 6 post-inoculation IgG treatment also improved kidney function in infected mice. Murine and human commercially available IgG preparations bound to proteins in culture filtrates from E. coli O157:H7. Bound proteins were extracted from membranes and peptide sequences were identified by mass spectrometry. The findings showed that murine and human IgG bound to E. coli extracellular serine protease P (EspP) in the culture filtrate, via the IgG Fc domain. These results were confirmed using purified recombinant EspP and comparing culture filtrates from the wild-type E. coli O157:H7 strain to a deletion mutant lacking espP. Culture filtrates from wild-type E. coli O157:H7 exhibited enzymatic activity, specifically associated with the presence of EspP and demonstrated as pepsin cleavage, which was reduced in the presence of murine and human IgG. EspP is a virulence factor previously shown to promote colonic cell injury and the uptake of Shiga toxin by intestinal cells. The results presented here suggest that IgG binds to EspP, blocks its enzymatic activity, and protects the host from E. coli O157:H7 infection, even when given post-inoculation.
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Affiliation(s)
- Ashmita Tontanahal
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Vanessa Sperandio
- Departments of Microbiology and Biochemistry, University of Texas Southwestern Medical Center, Dallas, TX, United States
| | - Olga Kovbasnjuk
- Division of Gastroenterology, Department of Internal Medicine, University of New Mexico Health Science Center, Albuquerque, NM, United States
| | - Sebastian Loos
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Diana Karpman
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund, Sweden
- *Correspondence: Diana Karpman,
| | - Ida Arvidsson
- Department of Pediatrics, Clinical Sciences Lund, Lund University, Lund, Sweden
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41
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Ling WL, Yeo JY, Ng YL, Wipat A, Gan SKE. More Than Meets the Kappa for Antibody Superantigen Protein L (PpL). Antibodies (Basel) 2022; 11:14. [PMID: 35225872 PMCID: PMC8883962 DOI: 10.3390/antib11010014] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 02/04/2022] [Accepted: 02/07/2022] [Indexed: 02/04/2023] Open
Abstract
Immunoglobulin superantigens play an important role in affinity purification of antibodies and the microbiota-immune axis at mucosal areas. Based on current understanding, Staphylococcal Protein A (SpA), Streptococcal Protein G (SpG) and Finegoldia Protein L (PpL) are thought to only bind specific regions of human antibodies, allowing for selective purification of antibody isotypes and chains. Clinically, these superantigens are often classified as toxins and increase the virulence of the producing pathogen through unspecific interactions with immune proteins. To perform an in-depth interaction study of these three superantigens with antibodies, bio-layer interferometry (BLI) measurements of their interactions with a permutation panel of 63 IgG1 variants of Pertuzumab and Trastuzumab CDRs grafted to the six human Vκ and seven human VH region families were tested. Through this holistic and systemic analysis of IgG1 variants with various antibody regions modified, comparisons revealed novel PpL-antibody interactions influenced by other non-canonical antibody known light-chain framework regions, whereas SpA and SpG showed relatively consistent interactions. These findings have implications on PpL-based affinity antibody purification and design that can guide the engineering and understanding of PpL-based microbiota-immune effects.
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Affiliation(s)
- Wei-Li Ling
- Antibody & Product Development Laboratory, Experimental Drug Development Centre—Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), Singapore 138672, Singapore; (W.-L.L.); (J.Y.Y.)
- Newcastle Research and Innovation Institute (NewRIIS), Singapore 609607, Singapore;
| | - Joshua Yi Yeo
- Antibody & Product Development Laboratory, Experimental Drug Development Centre—Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), Singapore 138672, Singapore; (W.-L.L.); (J.Y.Y.)
| | - Yuen-Ling Ng
- Newcastle Research and Innovation Institute (NewRIIS), Singapore 609607, Singapore;
| | - Anil Wipat
- School of Computing, Newcastle University, Newcastle upon Tyne NE1 7RU, UK;
| | - Samuel Ken-En Gan
- Antibody & Product Development Laboratory, Experimental Drug Development Centre—Bioinformatics Institute, Agency for Science, Technology and Research (A*STAR), Singapore 138672, Singapore; (W.-L.L.); (J.Y.Y.)
- James Cook University, Singapore 387380, Singapore
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Mukai H, Ogawa K, Kato N, Kawakami S. Recent advances in lipid nanoparticles for delivery of nucleic acid, mRNA, and gene editing-based therapeutics. Drug Metab Pharmacokinet 2022; 44:100450. [PMID: 35381574 PMCID: PMC9363157 DOI: 10.1016/j.dmpk.2022.100450] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/30/2022] [Accepted: 02/01/2022] [Indexed: 12/26/2022]
Abstract
Lipid nanoparticles (LNPs) are becoming popular as a means of delivering therapeutics, including those based on nucleic acids and mRNA. The mRNA-based coronavirus disease 2019 vaccines are perfect examples to highlight the role played by drug delivery systems in advancing human health. The fundamentals of LNPs for the delivery of nucleic acid- and mRNA-based therapeutics, are well established. Thus, future research on LNPs will focus on addressing the following: expanding the scope of drug delivery to different constituents of the human body, expanding the number of diseases that can be targeted, and studying the change in the pharmacokinetics of LNPs under physiological and pathological conditions. This review article provides an overview of recent advances aimed at expanding the application of LNPs, focusing on the pharmacokinetics and advantages of LNPs. In addition, analytical techniques, library construction and screening, rational design, active targeting, and applicability to gene editing therapy have also been discussed.
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Affiliation(s)
- Hidefumi Mukai
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8588, Japan; Laboratory for Molecular Delivery and Imaging Technology, RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo, 650-0047, Japan.
| | - Koki Ogawa
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8588, Japan
| | - Naoya Kato
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8588, Japan
| | - Shigeru Kawakami
- Department of Pharmaceutical Informatics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki-shi, Nagasaki, 852-8588, Japan.
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43
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Yun YR, Lee SY, Seo B, Kim H, Shin MG, Yang S. Sensitive electrochemical immunosensor to detect prohibitin 2, a potential blood cancer biomarker. Talanta 2022; 238:123053. [PMID: 34801909 DOI: 10.1016/j.talanta.2021.123053] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 10/19/2021] [Accepted: 11/07/2021] [Indexed: 11/28/2022]
Abstract
Blood cancers are difficult to cure completely and frequently show a poor prognosis. Recently, prohibitin 2 (PHB2) has been shown to be a potential biomarker for blood cancers. Sandwich ELISA can be used as a reference method for quantitative analysis of PHB2; however, ELISA can be challenging for early diagnosis and continuous monitoring method due to the need for large sample volumes (25 μL <), technical expertise, complex procedure, relative high cost, and non-portability. Thus, this study developed a sensitive and time efficient electrochemical immunosensor for detecting PHB2 from a blood cancer patient. It is a simple and portable platform consisting of a disposable electrode and blood sample volume of 4 μL. The sensor uses a gold nanostructured electrode and square wave voltammetry (SWV) measurement of a horseradish peroxidase (HRP) label to amplify the electrochemical signal. The immunosensor could quantitatively detect PHB2 with high sensitivity (limit of detection [LoD] = 0.04 ng/mL) and satisfactory reproducibility (relative standard deviation [RSD] <5.2%). The sensor achieved an LoD of 0.63 ng/mL with satisfactory recovery (89.1-104.7%) and reproducibility (RSD <6.4%) with PHB2 spiked into white blood cell (WBC) lysates. When the sensor was compared to a reference ELISA to determine the PHB2 concentrations in WBC lysate samples from healthy patients and those with blood cancer, the correlation coefficient (R2) was 0.996. A 3.3-fold difference was detected in the measured PHB2 concentration between blood cancer patients and healthy individuals. Accordingly, this study suggests a sensitive and accurate analytical method for quantitatively detecting the PHB2 in blood samples.
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Affiliation(s)
- Young-Ran Yun
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
| | - Seung Yeob Lee
- Department of Laboratory Medicine, Jeonbuk National University Medical School and Hospital, Jeonju, Republic of Korea
| | - Bokyung Seo
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea
| | - Hojin Kim
- Department of Mechatronics Engineering, Dongseo University, Busan, Republic of Korea
| | - Myung Geun Shin
- Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hwasun Hospital (CNUHH), Hwasun, Republic of Korea
| | - Sung Yang
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea; School of Mechanical Engineering, GIST, Gwangju, Republic of Korea.
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44
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Ojha R, Gurjar K, Ratnakar TS, Mishra A, Prajapati VK. Designing of a bispecific antibody against SARS-CoV-2 spike glycoprotein targeting human entry receptors DPP4 and ACE2. Hum Immunol 2022; 83:346-355. [PMID: 35042653 PMCID: PMC8744466 DOI: 10.1016/j.humimm.2022.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 12/24/2022]
Abstract
COVID-19 originated in Wuhan city, China, in 2019 erupted a global pandemic that had put down nearly 3 million lives and hampered the socio-economic conditions of all nations. Despite the available treatments, this disease is not being controlled totally and spreading swiftly. The deadly virus commences infection by hACE2 receptor and its co-receptors (DPP4) engagement with the viral spike protein in the lung alveolar epithelial cells, indicating a primary therapeutic target. The current research attempts to design an in-silico Bispecific antibody (BsAb) against viral spike glycoprotein and DPP4 receptors. Regdanvimab and Begelomab were identified to block the D614G mutated spike glycoprotein of SARS-CoV-2 and host DPP4 receptor, respectively. The designed BsAb was modified by using KIH (Knobs into Holes) and CrossMAb techniques to prevent heavy chain and light chain mispairings. Following the modifications, the site-specific molecular docking studies were performed, revealing a relatively higher binding affinity of BsAb with spike glycoprotein and DPP4 co-receptor than control BsAb. Also, for blocking the primary entry receptor, hACE2, an anti-viral peptide was linked to the Fc region of BsAb that blocks the hACE2 receptor by linker cleavage inside the infected host. Thus, the designed BsAb and anti-viral peptide therapy could be a promising triumvirate way to obstruct the viral entry by blocking the receptor engagement.
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Affiliation(s)
- Rupal Ojha
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, 305817 Ajmer, Rajasthan, India
| | - Kiran Gurjar
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, 305817 Ajmer, Rajasthan, India
| | - Tadi Sai Ratnakar
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, 305817 Ajmer, Rajasthan, India
| | - Amit Mishra
- Cellular and Molecular Neurobiology Unit, Indian Institute of Technology Jodhpur, Jodhpur 342011, Rajasthan, India
| | - Vijay Kumar Prajapati
- Department of Biochemistry, School of Life Sciences, Central University of Rajasthan, NH-8, Bandarsindri, Kishangarh, 305817 Ajmer, Rajasthan, India.
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45
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Gao S, Guisán JM, Rocha-Martin J. Oriented immobilization of antibodies onto sensing platforms - A critical review. Anal Chim Acta 2022; 1189:338907. [PMID: 34815045 DOI: 10.1016/j.aca.2021.338907] [Citation(s) in RCA: 70] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/08/2021] [Accepted: 07/31/2021] [Indexed: 12/26/2022]
Abstract
The immunosensor has been proven a versatile tool to detect various analytes, such as food contaminants, pathogenic bacteria, antibiotics and biomarkers related to cancer. To fabricate robust and reproducible immunosensors with high sensitivity, the covalent immobilization of immunoglobulins (IgGs) in a site-specific manner contributes to better performance. Instead of the random IgG orientations result from the direct yet non-selective immobilization techniques, this review for the first time introduces the advances of stepwise yet site-selective conjugation strategies to give better biosensing efficiency. Noncovalently adsorbing IgGs is the first but decisive step to interact specifically with the Fc fragment, then following covalent conjugate can fix this uniform and antigens-favorable orientation irreversibly. In this review, we first categorized this stepwise strategy into two parts based on the different noncovalent interactions, namely adhesive layer-mediated interaction onto homofunctional support and layer-free interaction onto heterofunctional support (which displays several different functionalities on its surface that are capable to interact with IgGs). Further, the influence of ligands characteristics (synthesis strategies, spacer requirements and matrices selection) on the heterofunctional support has also been discussed. Finally, conclusions and future perspectives for the real-world application of stepwise covalent conjugation are discussed. This review provides more insights into the fabrication of high-efficiency immunosensor, and special attention has been devoted to the well-orientation of full-length IgGs onto the sensing platform.
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Affiliation(s)
- Shipeng Gao
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain
| | - José M Guisán
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
| | - Javier Rocha-Martin
- Department of Biocatalysis, Institute of Catalysis and Petrochemistry (ICP) CSIC, Campus UAM, Cantoblanco, 28049, Madrid, Spain.
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Abstract
Antibodies are an integral part of many biological assays and biotherapeutics. However, the sources from which antibodies are derived frequently contain other contaminants which may interfere with assays or cause adverse reactions if administered in vivo. Therefore, a means of isolating these antibodies from their source at high levels of purity is critical. Affinity chromatography is currently one of the most widely applied methods for the purification of antibodies. This method relies on specific and reversible, interactions between antibody structures, or recombinant tags fused to these structures, and ligands immobilized on solid support matrices, generally within a column. Herein, common chromatographic methods applied to antibody purification are described. These include the purification of IgG, and its recombinant forms, through protein A, protein G and immobilized metal affinity chromatography.
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Affiliation(s)
- Arabelle Cassedy
- School of Biotechnology, Dublin City University, Dublin, Ireland
| | - Richard O'Kennedy
- School of Biotechnology, Dublin City University, Dublin, Ireland.
- Hamad Bin Khalifa University, Doha, Qatar.
- Qatar Foundation, Doha, Qatar.
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47
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Irani V, Soliman C, Raftis MA, Guy AJ, Elbourne A, Ramsland PA. Expression of monoclonal antibodies for functional and structural studies. METHODS IN MICROBIOLOGY 2022. [DOI: 10.1016/bs.mim.2022.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Song SJ, Diao HP, Moon B, Yun A, Hwang I. The B1 Domain of Streptococcal Protein G Serves as a Multi-Functional Tag for Recombinant Protein Production in Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:878677. [PMID: 35548280 PMCID: PMC9083265 DOI: 10.3389/fpls.2022.878677] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 03/21/2022] [Indexed: 05/17/2023]
Abstract
Plants have long been considered a cost-effective platform for recombinant production. A recently recognized additional advantage includes the low risk of contamination of human pathogens, such as viruses and bacterial endotoxins. Indeed, a great advance has been made in developing plants as a "factory" to produce recombinant proteins to use for biopharmaceutical purposes. However, there is still a need to develop new tools for recombinant protein production in plants. In this study, we provide data showing that the B1 domain of Streptococcal protein G (GB1) can be a multi-functional domain of recombinant proteins in plants. N-terminal fusion of the GB1 domain increased the expression level of various target proteins ranging from 1.3- to 3.1-fold at the protein level depending on the target proteins. GB1 fusion led to the stabilization of the fusion proteins. Furthermore, the direct detection of GB1-fusion proteins by the secondary anti-IgG antibody eliminated the use of the primary antibody for western blot analysis. Based on these data, we propose that the small GB1 domain can be used as a versatile tag for recombinant protein production in plants.
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The Retropepsin-Type Protease APRc as a Novel Ig-Binding Protein and Moonlighting Immune Evasion Factor of Rickettsia. mBio 2021; 12:e0305921. [PMID: 34872352 PMCID: PMC8649778 DOI: 10.1128/mbio.03059-21] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Rickettsiae are obligate intracellular Gram-negative bacteria transmitted by arthropod vectors. Despite their reduced genomes, the function(s) of the majority of rickettsial proteins remains to be uncovered. APRc is a highly conserved retropepsin-type protease, suggested to act as a modulator of other rickettsial surface proteins with a role in adhesion/invasion. However, APRc’s function(s) in bacterial pathogenesis and virulence remains unknown. This study demonstrates that APRc targets host serum components, combining nonimmune immunoglobulin (Ig)-binding activity with resistance to complement-mediated killing. We confirmed nonimmune human IgG binding in extracts of different rickettsial species and intact bacteria. Our results revealed that the soluble domain of APRc is capable of binding to human (h), mouse, and rabbit IgG and different classes of human Ig (IgG, IgM, and IgA) in a concentration-dependent manner. APRc-hIgG interaction was confirmed with total hIgG and normal human serum. APRc-hIgG displayed a binding affinity in the micromolar range. We provided evidence of interaction preferentially through the Fab region and confirmed that binding is independent of catalytic activity. Mapping the APRc region responsible for binding revealed the segment between amino acids 157 and 166 as one of the interacting regions. Furthermore, we demonstrated that expression of the full-length protease in Escherichia coli is sufficient to promote resistance to complement-mediated killing and that interaction with IgG contributes to serum resistance. Our findings position APRc as a novel Ig-binding protein and a novel moonlighting immune evasion factor of Rickettsia, contributing to the arsenal of virulence factors utilized by these intracellular pathogens to aid in host colonization.
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Lin T, Huang X, Guo L, Zhou S, Li X, Liu Y, Hu J, Chen X, Xiong Y. Boronate affinity-assisted oriented antibody conjugation on quantum dot nanobeads for improved detection performance in lateral flow immunoassay. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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