1
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Stark K, Kilani B, Stockhausen S, Busse J, Schubert I, Tran TD, Gaertner F, Leunig A, Pekayvaz K, Nicolai L, Fumagalli V, Stermann J, Stephan F, David C, Müller MB, Heyman B, Lux A, da Palma Guerreiro A, Frenzel LP, Schmidt CQ, Dopler A, Moser M, Chandraratne S, von Brühl ML, Lorenz M, Korff T, Rudelius M, Popp O, Kirchner M, Mertins P, Nimmerjahn F, Iannacone M, Sperandio M, Engelmann B, Verschoor A, Massberg S. Antibodies and complement are key drivers of thrombosis. Immunity 2024; 57:2140-2156.e10. [PMID: 39226900 DOI: 10.1016/j.immuni.2024.08.007] [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: 05/07/2024] [Revised: 05/17/2024] [Accepted: 08/07/2024] [Indexed: 09/05/2024]
Abstract
Venous thromboembolism (VTE) is a common, deadly disease with an increasing incidence despite preventive efforts. Clinical observations have associated elevated antibody concentrations or antibody-based therapies with thrombotic events. However, how antibodies contribute to thrombosis is unknown. Here, we show that reduced blood flow enabled immunoglobulin M (IgM) to bind to FcμR and the polymeric immunoglobulin receptor (pIgR), initiating endothelial activation and platelet recruitment. Subsequently, the procoagulant surface of activated platelets accommodated antigen- and FcγR-independent IgG deposition. This leads to classical complement activation, setting in motion a prothrombotic vicious circle. Key elements of this mechanism were present in humans in the setting of venous stasis as well as in the dysregulated immunothrombosis of COVID-19. This antibody-driven thrombosis can be prevented by pharmacologically targeting complement. Hence, our results uncover antibodies as previously unrecognized central regulators of thrombosis. These findings carry relevance for therapeutic application of antibodies and open innovative avenues to target thrombosis without compromising hemostasis.
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Affiliation(s)
- Konstantin Stark
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany.
| | - Badr Kilani
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Sven Stockhausen
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Johanna Busse
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Irene Schubert
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Thuy-Duong Tran
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Florian Gaertner
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany; Institute of Science and Technology Austria, Klosterneuburg, Austria
| | - Alexander Leunig
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Kami Pekayvaz
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Leo Nicolai
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Valeria Fumagalli
- Division of Immunology, Transplantation, and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - Julia Stermann
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Felix Stephan
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Christian David
- Institute for Cardiovascular Physiology and Pathophysiology, Walter Brendel Center for Experimental Medicine, Biomedical Center (BMC) LMU Munich, Munich, Germany
| | - Martin B Müller
- Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany; Department of Anaesthesiology, University Hospital, LMU Munich, Munich, Germany
| | - Birgitta Heyman
- Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden
| | - Anja Lux
- Department of Biology, Institute of Genetics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany; Medical Immunology Campus Erlangen (MICE), Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Alexandra da Palma Guerreiro
- Department I of Internal Medicine, University Hospital Cologne, Cologne 50937, Germany; Center of Integrated Oncology ABCD, University Hospital of Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne 50937, Germany
| | - Lukas P Frenzel
- Department I of Internal Medicine, University Hospital Cologne, Cologne 50937, Germany; Center of Integrated Oncology ABCD, University Hospital of Cologne, Cologne, Germany; Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, Cologne 50937, Germany
| | - Christoph Q Schmidt
- Institute of Experimental and Clinical Pharmacology, Toxicology and Pharmacology of Natural Products, University of Ulm Medical Center, Ulm, Germany
| | - Arthur Dopler
- Institute of Experimental and Clinical Pharmacology, Toxicology and Pharmacology of Natural Products, University of Ulm Medical Center, Ulm, Germany
| | - Markus Moser
- Department of Molecular Medicine, Max-Planck-Institute of Biochemistry, Martinsried, Germany; Institute of Experimental Hematology, TranslaTUM, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
| | - Sue Chandraratne
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Marie-Luise von Brühl
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Michael Lorenz
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
| | - Thomas Korff
- Division of Cardiovascular Physiology, Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Martina Rudelius
- Institute of Pathology, Ludwig-Maximilian University, Munich, Germany
| | - Oliver Popp
- Max Delbrück Center for Molecular Medicine (MDC) and Berlin Institute of Health (BIH), Berlin, Germany; German Center for Cardiovascular Research (DZHK), partner site Berlin, Berlin, Germany
| | - Marieluise Kirchner
- Max Delbrück Center for Molecular Medicine (MDC) and Berlin Institute of Health (BIH), Berlin, Germany; German Center for Cardiovascular Research (DZHK), partner site Berlin, Berlin, Germany
| | - Philipp Mertins
- Max Delbrück Center for Molecular Medicine (MDC) and Berlin Institute of Health (BIH), Berlin, Germany; German Center for Cardiovascular Research (DZHK), partner site Berlin, Berlin, Germany
| | - Falk Nimmerjahn
- Department of Biology, Institute of Genetics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany; Medical Immunology Campus Erlangen (MICE), Friedrich-Alexander University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Matteo Iannacone
- Division of Immunology, Transplantation, and Infectious Diseases, IRCCS San Raffaele Scientific Institute, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - Markus Sperandio
- Institute for Cardiovascular Physiology and Pathophysiology, Walter Brendel Center for Experimental Medicine, Biomedical Center (BMC) LMU Munich, Munich, Germany
| | - Bernd Engelmann
- Institut für Laboratoriumsmedizin, University Hospital, LMU Munich, Munich, Germany
| | - Admar Verschoor
- Department of Dermatology, Allergy, and Venereology, University of Lübeck, Lübeck, Germany; Department of Otorhinolaryngology, Technische Universität München and Klinikum Rechts der Isar, Munich, Germany.
| | - Steffen Massberg
- Medizinische Klinik und Poliklinik I, University Hospital, LMU Munich, Munich, Germany; German Center for Cardiovascular Research (DZHK), partner site Munich Heart Alliance, Munich, Germany; Walter-Brendel Center of Experimental Medicine, Faculty of Medicine, LMU Munich, Munich, Germany
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2
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Aymerich N, Schlotheuber LJ, Bucheli OTM, Portmann K, Baudry J, Eyer K. Antibody density on bacteria regulates C1q recruitment by monoclonal IgG but not IgM. Eur J Immunol 2024:e2451228. [PMID: 39233515 DOI: 10.1002/eji.202451228] [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: 04/30/2024] [Revised: 08/23/2024] [Accepted: 08/24/2024] [Indexed: 09/06/2024]
Abstract
Antibodies that trigger the complement system play a pivotal role in the immune defense against pathogenic bacteria and offer potential therapeutic avenues for combating antibiotic-resistant bacterial infections, a rising global concern. To gain a deeper understanding of the key parameters regulating complement activation by monoclonal antibodies, we developed a novel bioassay for quantifying classical complement activation at the monoclonal antibody level, and employed this assay to characterize rare complement-activating antibacterial antibodies on the single-antibody level in postimmunization murine antibody repertoires. We characterized monoclonal antibodies from various antibody isotypes against specific pathogenic bacteria (Bordetella pertussis and Neisseria meningitidis) to broaden the scope of our findings. We demonstrated activation of the classical pathway by individual IgM- and IgG-secreting cells, that is, monoclonal IgM and IgG2a/2b/3 subclasses. Additionally, we could observe different epitope density requirements for efficient C1q binding depending on antibody isotype, which is in agreement with previously proposed molecular mechanisms. In short, we found that antibody density most crucially regulated C1q recruitment by monoclonal IgG isotypes, but not IgM isotypes. This study provides additional insights into important parameters for classical complement initiation by monoclonal antibodies, a knowledge that might inform antibody screening and vaccination efforts.
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Affiliation(s)
- Nathan Aymerich
- Laboratoire Colloïdes et Matériaux Divisés (LCMD), ESPCI Paris, PSL Research University, CNRS UMR8231 Chimie Biologie Innovation, Paris, France
| | - Luca J Schlotheuber
- Laboratory for Functional Immune Repertoire Analysis, Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
| | - Olivia T M Bucheli
- Laboratory for Functional Immune Repertoire Analysis, Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
| | - Kevin Portmann
- Laboratory for Functional Immune Repertoire Analysis, Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
| | - Jean Baudry
- Laboratoire Colloïdes et Matériaux Divisés (LCMD), ESPCI Paris, PSL Research University, CNRS UMR8231 Chimie Biologie Innovation, Paris, France
| | - Klaus Eyer
- Laboratory for Functional Immune Repertoire Analysis, Institute of Pharmaceutical Sciences, Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich, Switzerland
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
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3
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Bellini N, Ye C, Ajibola O, Murooka TT, Lodge R, Cohen ÉA. Downregulation of miRNA-26a by HIV-1 Enhances CD59 Expression and Packaging, Impacting Virus Susceptibility to Antibody-Dependent Complement-Mediated Lysis. Viruses 2024; 16:1076. [PMID: 39066239 PMCID: PMC11281366 DOI: 10.3390/v16071076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Revised: 06/29/2024] [Accepted: 06/29/2024] [Indexed: 07/28/2024] Open
Abstract
MicroRNAs (miRNAs) play important roles in the control of HIV-1 infection. Here, we performed RNA-seq profiling of miRNAs and mRNAs expressed in CD4+ T lymphocytes upon HIV-1 infection. Our results reveal significant alterations in miRNA and mRNA expression profiles in infected relative to uninfected cells. One of the miRNAs markedly downregulated in infected cells is miRNA-26a. Among the putative targets of miRNA-26a are CD59 receptor transcripts, which are significantly upregulated in infected CD4+ T cells. The addition of miRNA-26a mimics to CD4+ T cells reduces CD59 at both the mRNA and surface protein levels, validating CD59 as a miRNA-26a target. Consistent with the reported inhibitory role of CD59 in complement-mediated lysis (CML), knocking out CD59 in CD4+ T cells renders both HIV-1-infected cells and progeny virions more prone to antibody-dependent CML (ADCML). The addition of miRNA-26a mimics to infected cells leads to enhanced sensitivity of progeny virions to ADCML, a condition linked to a reduction in CD59 packaging into released virions. Lastly, HIV-1-mediated downregulation of miRNA-26a expression is shown to be dependent on integrated HIV-1 expression but does not involve viral accessory proteins. Overall, these results highlight a novel mechanism by which HIV-1 limits ADCML by upregulating CD59 expression via miRNA-26a downmodulation.
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Affiliation(s)
- Nicolas Bellini
- Laboratory of Human Retrovirology, Institut de Recherches Cliniques de Montréal, Montreal, QC H2W 1R7, Canada; (N.B.); (C.Y.); (R.L.)
- Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Université de Montréal, Montreal, QC H3C 3J7, Canada
| | - Chengyu Ye
- Laboratory of Human Retrovirology, Institut de Recherches Cliniques de Montréal, Montreal, QC H2W 1R7, Canada; (N.B.); (C.Y.); (R.L.)
| | - Oluwaseun Ajibola
- Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0T5, Canada; (O.A.); (T.T.M.)
| | - Thomas T. Murooka
- Department of Immunology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0T5, Canada; (O.A.); (T.T.M.)
| | - Robert Lodge
- Laboratory of Human Retrovirology, Institut de Recherches Cliniques de Montréal, Montreal, QC H2W 1R7, Canada; (N.B.); (C.Y.); (R.L.)
| | - Éric A. Cohen
- Laboratory of Human Retrovirology, Institut de Recherches Cliniques de Montréal, Montreal, QC H2W 1R7, Canada; (N.B.); (C.Y.); (R.L.)
- Department of Microbiology, Infectious Diseases and Immunology, Faculty of Medicine, Université de Montréal, Montreal, QC H3C 3J7, Canada
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4
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Abendstein L, Noteborn WEM, Veenman LS, Dijkstra DJ, van de Bovenkamp FS, Trouw LA, Sharp TH. DNA Nanostructure-Templated Antibody Complexes Provide Insights into the Geometric Requirements of Human Complement Cascade Activation. J Am Chem Soc 2024; 146:13455-13466. [PMID: 38703132 PMCID: PMC11099972 DOI: 10.1021/jacs.4c02772] [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: 05/06/2024]
Abstract
The classical complement pathway is activated by antigen-bound IgG antibodies. Monomeric IgG must oligomerize to activate complement via the hexameric C1q complex, and hexamerizing mutants of IgG appear as promising therapeutic candidates. However, structural data have shown that it is not necessary to bind all six C1q arms to initiate complement, revealing a symmetry mismatch between C1 and the hexameric IgG complex that has not been adequately explained. Here, we use DNA nanotechnology to produce specific nanostructures to template antigens and thereby spatially control IgG valency. These DNA-nanotemplated IgG complexes can activate complement on cell-mimetic lipid membranes, which enabled us to determine the effect of IgG valency on complement activation without the requirement to mutate antibodies. We investigated this using biophysical assays together with 3D cryo-electron tomography. Our data revealed the importance of interantigen distance on antibody-mediated complement activation, and that the cleavage of complement component C4 by the C1 complex is proportional to the number of ideally spaced antigens. Increased IgG valency also translated to better terminal pathway activation and membrane attack complex formation. Together, these data provide insights into how nanopatterning antigen-antibody complexes influence the activation of the C1 complex and suggest routes to modulate complement activation by antibody engineering. Furthermore, to our knowledge, this is the first time DNA nanotechnology has been used to study the activation of the complement system.
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Affiliation(s)
- Leoni Abendstein
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden 2300 RC, The Netherlands
| | - Willem E M Noteborn
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden 2300 RC, The Netherlands
| | - Luc S Veenman
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden 2300 RC, The Netherlands
| | - Douwe J Dijkstra
- Department of Immunology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands
| | | | - Leendert A Trouw
- Department of Immunology, Leiden University Medical Center, Leiden 2333 ZA, The Netherlands
| | - Thomas H Sharp
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden 2300 RC, The Netherlands
- School of Biochemistry, University of Bristol, Bristol BS8 1TD, U.K
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5
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Bryushkova EA, Mushenkova NV, Turchaninova MA, Lukyanov DK, Chudakov DM, Serebrovskaya EO. B cell clonality in cancer. Semin Immunol 2024; 72:101874. [PMID: 38508089 DOI: 10.1016/j.smim.2024.101874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 01/05/2024] [Accepted: 01/05/2024] [Indexed: 03/22/2024]
Abstract
Carcinogenesis in the process of long-term co-evolution of tumor cells and immune environment essentially becomes possible due to incorrect decisions made, remembered, and reproduced by the immune system at the level of clonal populations of antigen-specific T- and B-lymphocytes. Tumor-immunity interaction determines the nature of such errors and, consequently, delineates the possible ways of successful immunotherapeutic intervention. It is generally recognized that tumor-infiltrating B cells (TIL-B) can play both pro-tumor and anti-tumor roles. However, the exact mechanisms that determine the contribution of clonal B cell lineages with different specificities and functions remain largely unclear. This is due to the variability of cancer types, the molecular heterogeneity of tumor cells, and, to a large extent, the individual pattern of each immune response. Further progress requires detailed investigation of the functional properties and phenotypes of clonally heterogeneous B cells in relation to their antigenic specificities, which determine the functionality of both effector B lymphocytes and immunoglobulins produced in the tumor environment. Based on a real understanding of the role of clonal antigen-specific populations of B lymphocytes in the tumor microenvironment, we need to learn how to develop new methods of targeted immunotherapy, as well as adapt existing treatment options to the specific needs of different patients and patient subgroups. In this review, we will cover B cells functional diversity and their multifaceted roles in the tumor environment.
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Affiliation(s)
- E A Bryushkova
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia; Department of Molecular Biology, Lomonosov Moscow State University, Moscow, Russia
| | - N V Mushenkova
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia; Unicorn Capital Partners, Moscow, Russia
| | - M A Turchaninova
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia
| | - D K Lukyanov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia; Center of Life Sciences, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - D M Chudakov
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia; Center of Life Sciences, Skolkovo Institute of Science and Technology, Moscow, Russia; Central European Institute of Technology, Masaryk University, Brno, Czech Republic.
| | - E O Serebrovskaya
- Institute of Translational Medicine, Pirogov Russian National Research Medical University, Moscow, Russia; Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS, Moscow, Russia; Current position: Miltenyi Biotec B.V. & Co. KG, Bergisch Gladbach, Germany
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6
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Yang Y, Ivanov DG, Levin MD, Olenyuk B, Cordova-Robles O, Cederstrom B, Schnitzer JE, Kaltashov IA. Characterization of Large Immune Complexes with Size Exclusion Chromatography and Native Mass Spectrometry Supplemented with Gas Phase Ion Chemistry. Anal Chem 2024. [PMID: 38319243 DOI: 10.1021/acs.analchem.3c03278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
Large immune complexes formed by the cross-linking of antibodies with polyvalent antigens play critical roles in modulating cell-mediated immunity. While both the size and the shape of immune complexes are important determinants in Fc receptor-mediated signaling responsible for phagocytosis, degranulation, and, in some instances, autoimmune pathologies, their characterization remains extremely challenging due to their large size and structural heterogeneity. We use native mass spectrometry (MS) supplemented with limited charge reduction in the gas phase to determine the stoichiometry of immune complexes formed by a bivalent (homodimeric) antigen, a 163 kDa aminopeptidase P2 (APP2), and a monoclonal antibody (mAb) to APP2. The observed (APP2·mAb)n complexes populate a wide range of stoichiometries (n = 1-4) with the largest detected species exceeding 1 MDa, although the gas-phase dissociation products are also evident in the mass spectra. While frequently considering a nuisance that complicates interpretation of native MS data, limited dissociation provides an additional dimension for characterization of the immune complex quaternary structure. APP2/mAb associations with identical composition but slightly different elution times in size exclusion chromatography exhibit notable differences in their spontaneous fragmentation profiles. The latter indicates the presence of both extended linear and cyclized (APP2·mAb)n configurations. The unique ability of MS to distinguish between such isomeric structures will be invaluable for a variety of applications where the biological effects of immune complexes are determined by their ability to assemble Fc receptor clusters of certain density on cell surfaces, such as platelet activation by clustering the low-affinity receptors FcγRIIa on their surface.
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Affiliation(s)
- Yang Yang
- Department of Chemistry, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA
| | - Daniil G Ivanov
- Department of Chemistry, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA
| | - Michael D Levin
- Proteogenomics Research Institute for Systems Medicine, La Jolla, California 92037, USA
| | - Bogdan Olenyuk
- Proteogenomics Research Institute for Systems Medicine, La Jolla, California 92037, USA
| | - Oscar Cordova-Robles
- Proteogenomics Research Institute for Systems Medicine, La Jolla, California 92037, USA
| | - Brittany Cederstrom
- Proteogenomics Research Institute for Systems Medicine, La Jolla, California 92037, USA
| | - Jan E Schnitzer
- Proteogenomics Research Institute for Systems Medicine, La Jolla, California 92037, USA
| | - Igor A Kaltashov
- Department of Chemistry, University of Massachusetts-Amherst, Amherst, Massachusetts 01003, USA
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7
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Romei MG, Leonard B, Katz ZB, Le D, Yang Y, Day ES, Koo CW, Sharma P, Bevers Iii J, Kim I, Dai H, Farahi F, Lin M, Shaw AS, Nakamura G, Sockolosky JT, Lazar GA. i-shaped antibody engineering enables conformational tuning of biotherapeutic receptor agonists. Nat Commun 2024; 15:642. [PMID: 38245524 PMCID: PMC10799922 DOI: 10.1038/s41467-024-44985-x] [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: 03/22/2023] [Accepted: 01/11/2024] [Indexed: 01/22/2024] Open
Abstract
The ability to leverage antibodies to agonize disease relevant biological pathways has tremendous potential for clinical investigation. Yet while antibodies have been successful as antagonists, immune mediators, and targeting agents, they are not readily effective at recapitulating the biology of natural ligands. Among the important determinants of antibody agonist activity is the geometry of target receptor engagement. Here, we describe an engineering approach inspired by a naturally occurring Fab-Fab homotypic interaction that constrains IgG in a unique i-shaped conformation. i-shaped antibody (iAb) engineering enables potent intrinsic agonism of five tumor necrosis factor receptor superfamily (TNFRSF) targets. When applied to bispecific antibodies against the heterodimeric IL-2 receptor pair, constrained bispecific IgG formats recapitulate IL-2 agonist activity. iAb engineering provides a tool to tune agonist antibody function and this work provides a framework for the development of intrinsic antibody agonists with the potential for generalization across broad receptor classes.
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Affiliation(s)
- Matthew G Romei
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Brandon Leonard
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Zachary B Katz
- Department of Research Biology, Genentech Inc., South San Francisco, CA, USA
| | - Daniel Le
- Department of Microchemistry, Proteomic, Lipidomics, and Next Generation Sequencing, Genentech Inc., South San Francisco, CA, USA
| | - Yanli Yang
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Eric S Day
- Department of Pharma Technical Development, Genentech Inc., South San Francisco, CA, USA
| | - Christopher W Koo
- Department of Structural Biology, Genentech Inc., South San Francisco, CA, USA
| | - Preeti Sharma
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Jack Bevers Iii
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Ingrid Kim
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Huiguang Dai
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - Farzam Farahi
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | - May Lin
- Department of Protein Chemistry, Genentech Inc., South San Francisco, CA, USA
| | - Andrey S Shaw
- Department of Research Biology, Genentech Inc., South San Francisco, CA, USA
| | - Gerald Nakamura
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA
| | | | - Greg A Lazar
- Department of Antibody Engineering, Genentech Inc., South San Francisco, CA, USA.
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8
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Bowman KA, Kaplonek P, McNamara RP. Understanding Fc function for rational vaccine design against pathogens. mBio 2024; 15:e0303623. [PMID: 38112418 PMCID: PMC10790774 DOI: 10.1128/mbio.03036-23] [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: 12/21/2023] Open
Abstract
Antibodies represent the primary correlate of immunity following most clinically approved vaccines. However, their mechanisms of action vary from pathogen to pathogen, ranging from neutralization, to opsonophagocytosis, to cytotoxicity. Antibody functions are regulated both by antigen specificity (Fab domain) and by the interaction of their Fc domain with distinct types of Fc receptors (FcRs) present in immune cells. Increasing evidence highlights the critical nature of Fc:FcR interactions in controlling pathogen spread and limiting the disease state. Moreover, variation in Fc-receptor engagement during the course of infection has been demonstrated across a range of pathogens, and this can be further influenced by prior exposure(s)/immunizations, age, pregnancy, and underlying health conditions. Fc:FcR functional variation occurs at the level of antibody isotype and subclass selection as well as post-translational modification of antibodies that shape Fc:FcR-interactions. These factors collectively support a model whereby the immune system actively harnesses and directs Fc:FcR interactions to fight disease. By defining the precise humoral mechanisms that control infections, as well as understanding how these functions can be actively tuned, it may be possible to open new paths for improving existing or novel vaccines.
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Affiliation(s)
- Kathryn A. Bowman
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, Massachusetts, USA
- Division of Infectious Diseases, Brigham and Women’s Hospital, Boston, Massachusetts, USA
| | - Paulina Kaplonek
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, Massachusetts, USA
| | - Ryan P. McNamara
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, Massachusetts, USA
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9
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Damelang T, Brinkhaus M, van Osch TLJ, Schuurman J, Labrijn AF, Rispens T, Vidarsson G. Impact of structural modifications of IgG antibodies on effector functions. Front Immunol 2024; 14:1304365. [PMID: 38259472 PMCID: PMC10800522 DOI: 10.3389/fimmu.2023.1304365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 12/11/2023] [Indexed: 01/24/2024] Open
Abstract
Immunoglobulin G (IgG) antibodies are a critical component of the adaptive immune system, binding to and neutralizing pathogens and other foreign substances. Recent advances in molecular antibody biology and structural protein engineering enabled the modification of IgG antibodies to enhance their therapeutic potential. This review summarizes recent progress in both natural and engineered structural modifications of IgG antibodies, including allotypic variation, glycosylation, Fc engineering, and Fc gamma receptor binding optimization. We discuss the functional consequences of these modifications to highlight their potential for therapeutical applications.
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Affiliation(s)
- Timon Damelang
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Sanquin Research, Department of Immunopathology, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Maximilian Brinkhaus
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Thijs L. J. van Osch
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Janine Schuurman
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Aran F. Labrijn
- Department of Antibody Research & Technologies’, Genmab, Utrecht, Netherlands
| | - Theo Rispens
- Sanquin Research, Department of Immunopathology, Amsterdam, Netherlands
| | - Gestur Vidarsson
- Sanquin Research, Department of Experimental Immunohematology and Landsteiner Laboratory, Amsterdam, Netherlands
- Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
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10
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van der Velden S, van Osch TLJ, Seghier A, Bentlage AEH, Mok JY, Geerdes DM, van Esch WJE, Pouw RB, Brouwer MC, Jongerius I, de Haas M, Porcelijn L, van der Schoot CE, Vidarsson G, Kapur R. Complement activation drives antibody-mediated transfusion-related acute lung injury via macrophage trafficking and formation of NETs. Blood 2024; 143:79-91. [PMID: 37801721 DOI: 10.1182/blood.2023020484] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 08/23/2023] [Accepted: 09/07/2023] [Indexed: 10/08/2023] Open
Abstract
ABSTRACT Transfusion-related acute lung injury (TRALI) is one of the leading causes of transfusion-related fatalities and, to date, is without available therapies. Here, we investigated the role of the complement system in TRALI. Murine anti-major histocompatibility complex class I antibodies were used in TRALI mouse models, in combination with analyses of plasma samples from patients with TRALI. We found that in vitro complement activation was related to in vivo antibody-mediated TRALI induction, which was correlated with increased macrophage trafficking from the lungs to the blood in a fragment crystallizable region (Fc)-dependent manner and that this was dependent on C5. Human immunoglobulin G 1 variants of the murine TRALI-inducing antibody 34-1-2S, either unable to activate complement and/or bind to Fcγ receptors (FcγRs), revealed an essential role for the complement system, but not for FcγRs, in the onset of 34-1-2S-mediated TRALI in mice. In addition, we found high levels of complement activation in the plasma of patients with TRALI (n = 53), which correlated with elevated neutrophil extracellular trap (NET) markers. In vitro we found that NETs could be formed in a murine, 2-hit model, mimicking TRALI with lipopolysaccharide and C5a stimulation. Collectively, this reveals a critical role of Fc-mediated complement activation in TRALI, with a direct relation to macrophage trafficking from the lungs to the blood and an association with NET formation, suggesting that targeting the complement system may be an attractive therapeutic approach for combating TRALI.
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Affiliation(s)
- Saskia van der Velden
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Thijs L J van Osch
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Amina Seghier
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Arthur E H Bentlage
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Juk Yee Mok
- Sanquin Reagents, Amsterdam, The Netherlands
| | | | | | - Richard B Pouw
- Department of Immunopathology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Mieke C Brouwer
- Department of Immunopathology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Ilse Jongerius
- Department of Immunopathology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, The Netherlands
- Department of Pediatric Immunology, Rheumatology and Infectious Diseases, Emma Children's Hospital, Amsterdam UMC, Amsterdam, The Netherlands
| | - Masja de Haas
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Department of Immunohematology Diagnostics, Sanquin Diagnostic Services, Amsterdam, The Netherlands
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, The Netherlands
| | - Leendert Porcelijn
- Department of Immunohematology Diagnostics, Sanquin Diagnostic Services, Amsterdam, The Netherlands
| | - C Ellen van der Schoot
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Gestur Vidarsson
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Rick Kapur
- Department of Experimental Immunohematology, Sanquin Research, and Landsteiner Laboratory, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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11
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Dijkstra DJ, van de Bovenkamp FS, Abendstein L, Zuijderduijn R, Pool J, Kramer CSM, Slot LM, Drijfhout JW, de Vor L, Gelderman KA, Rooijakkers SHM, Zaldumbide A, Vidarsson G, Sharp TH, Parren PWHI, Trouw LA. Human anti-C1q autoantibodies bind specifically to solid-phase C1q and enhance phagocytosis but not complement activation. Proc Natl Acad Sci U S A 2023; 120:e2310666120. [PMID: 38048459 PMCID: PMC10723154 DOI: 10.1073/pnas.2310666120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 10/27/2023] [Indexed: 12/06/2023] Open
Abstract
Autoantibodies directed against complement component C1q are commonly associated with autoimmune diseases, especially systemic lupus erythematosus. Importantly, these anti-C1q autoantibodies are specific for ligand-bound, solid-phase C1q and do not bind to fluid-phase C1q. In patients with anti-C1q, C1q levels are in the normal range, and the autoantibodies are thus not depleting. To study these human anti-C1q autoantibodies at the molecular level, we isolated C1q-reactive B cells and recombinantly produced nine monoclonal antibodies (mAbs) from four different healthy individuals. The isolated mAbs were of the IgG isotype, contained extensively mutated variable domains, and showed high affinity to the collagen-like region of C1q. The anti-C1q mAbs exclusively bound solid-phase C1q in complex with its natural ligands, including immobilized or antigen-bound IgG, IgM or CRP, and necrotic cells. Competition experiments reveal that at least 2 epitopes, also targeted by anti-C1q antibodies in sera from SLE patients, are recognized. Electron microscopy with hexameric IgG-C1q immune complexes demonstrated that multiple mAbs can interact with a single C1q molecule and identified the region of C1q targeted by these mAbs. The opsonization of immune complexes with anti-C1q greatly enhanced Fc-receptor-mediated phagocytosis but did not increase complement activation. We conclude that human anti-C1q autoantibodies specifically bind neo-epitopes on solid-phase C1q, which results in an increase in Fc-receptor-mediated effector functions that may potentially contribute to autoimmune disease immunopathology.
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Affiliation(s)
- Douwe J. Dijkstra
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Fleur S. van de Bovenkamp
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
- Lava Therapeutics, Utrecht3584 CM, The Netherlands
| | - Leoni Abendstein
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Rob Zuijderduijn
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Jos Pool
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Cynthia S. M. Kramer
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Linda M. Slot
- Department of Rheumatology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Jan W. Drijfhout
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Lisanne de Vor
- Department of Medical Microbiology, University Medical Center, Utrecht3584 CX, The Netherlands
| | | | - Suzan H. M. Rooijakkers
- Department of Medical Microbiology, University Medical Center, Utrecht3584 CX, The Netherlands
| | - Arnaud Zaldumbide
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Gestur Vidarsson
- Department of Experimental Immunohematology, Sanquin Research, Amsterdam1066 CX, The Netherlands
| | - Thomas H. Sharp
- Department of Cell and Chemical Biology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
| | - Paul W. H. I. Parren
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
- Gyes BV, Naarden1411 DC, The Netherlands
| | - Leendert A. Trouw
- Department of Immunology, Leiden University Medical Center, Leiden2300 RC, The Netherlands
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12
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Muts RM, den Boer MA, Bardoel BW, Aerts PC, de Haas CJC, Heck AJR, Rooijakkers SHM, Heesterbeek DAC. Artificial surface labelling of Escherichia coli with StrepTagII antigen to study how monoclonal antibodies drive complement-mediated killing. Sci Rep 2023; 13:18836. [PMID: 37914798 PMCID: PMC10620216 DOI: 10.1038/s41598-023-46026-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 10/26/2023] [Indexed: 11/03/2023] Open
Abstract
Antibodies play a key role in the immune defence against Gram-negative bacteria. After binding to bacterial surface antigens, IgG and IgM can activate the complement system and trigger formation of lytic membrane attack complex (MAC) pores. Molecular studies to compare functional activity of antibodies on bacteria are hampered by the limited availability of well-defined antibodies against bacterial surface antigens. Therefore, we genetically engineered E. coli by expressing the StrepTagII antigen into outer membrane protein X (OmpX) and validated that these engineered bacteria were recognised by anti-StrepTagII antibodies. We then combined this antigen-antibody system with a purified complement assay to avoid interference of serum components and directly compare MAC-mediated bacterial killing via IgG1 and pentameric IgM. While both IgG1 and IgM could induce MAC-mediated killing, we show that IgM has an increased capacity to induce complement-mediated killing of E. coli compared to IgG1. While Fc mutations that enhance IgG clustering after target binding could not improve MAC formation, mutations that cause formation of pre-assembled IgG hexamers enhanced the complement activating capacity of IgG1. Altogether, we here present a system to study antibody-dependent complement activation on E. coli and show IgM's enhanced capacity over IgG to induce complement-mediated lysis of E. coli.
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Affiliation(s)
- Remy M Muts
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Maurits A den Boer
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Netherlands Proteomic Center, 3584 CH, Utrecht, The Netherlands
| | - Bart W Bardoel
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Piet C Aerts
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Carla J C de Haas
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, 3584 CH, Utrecht, The Netherlands
- Netherlands Proteomic Center, 3584 CH, Utrecht, The Netherlands
| | - Suzan H M Rooijakkers
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Dani A C Heesterbeek
- Department of Medical Microbiology, University Medical Center Utrecht, 3584 CX, Utrecht, The Netherlands.
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13
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San PP, Jacob S. Role of complement in myasthenia gravis. Front Neurol 2023; 14:1277596. [PMID: 37869140 PMCID: PMC10585143 DOI: 10.3389/fneur.2023.1277596] [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: 08/14/2023] [Accepted: 09/18/2023] [Indexed: 10/24/2023] Open
Abstract
Myasthenia gravis is a prototypic neuroimmune disorder with autoantibodies targeting the acetylcholine receptor complex at the neuromuscular junction. Patients present with mainly ocular muscle weakness and tend to have a generalized muscle weakness later in the clinical course. The weakness can be severe and fatal when bulbar muscles are heavily involved. Acetylcholine receptor antibodies are present in the majority of patients and are of IgG1 and IgG3 subtypes which can activate the complement system. The complement involvement plays a major role in the neuromuscular junction damage and the supporting evidence in the literature is described in this article. Complement therapies were initially studied and approved for paroxysmal nocturnal hemoglobinuria and in the past decade, those have also been studied in myasthenia gravis. The currently available randomized control trial and real-world data on the efficacy and safety of the approved and investigational complement therapies are summarized in this review.
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Affiliation(s)
- Pyae Phyo San
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
| | - Saiju Jacob
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom
- Department of Neurology, Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
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14
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Lee W, Lee SM, Jung ST. Unlocking the Power of Complement-Dependent Cytotoxicity: Engineering Strategies for the Development of Potent Therapeutic Antibodies for Cancer Treatments. BioDrugs 2023; 37:637-648. [PMID: 37486566 DOI: 10.1007/s40259-023-00618-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
The complement system is a crucial part of the innate immune response, providing defense against invading pathogens and cancer cells. Recently, it has become evident that the complement system plays a significant role in anticancer activities, particularly through complement-dependent cytotoxicity (CDC), alongside antibody-dependent cell-mediated cytotoxicity (ADCC) and antibody-dependent cell-mediated phagocytosis (ADCP). With the discovery of new roles for serum complement molecules in the human immune system, various approaches are being pursued to develop CDC-enhanced antibody therapeutics. In this review, we focus on successful antibody engineering strategies for enhancing CDC, analyzing the lessons learned and the limitations of each approach. Furthermore, we outline potential pathways for the development of antibody therapeutics specifically aimed at enhancing CDC for superior therapeutic efficacy in the future.
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Affiliation(s)
- Wonju Lee
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea
| | - Sang Min Lee
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea
- Department of Applied Chemistry, Kookmin University, Seoul, 02707, Republic of Korea
| | - Sang Taek Jung
- Department of Biomedical Sciences, Graduate School of Medicine, Korea University, Seoul, 02841, Republic of Korea.
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul, Republic of Korea.
- Biomedical Research Center, Korea University Anam Hospital, Seoul, 02841, Republic of Korea.
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15
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Goldberg BS, Spencer DA, Pandey S, Ordonez T, Barnette P, Yu Y, Gao L, Dufloo J, Bruel T, Schwartz O, Ackerman ME, Hessell AJ. Complement contributes to antibody-mediated protection against repeated SHIV challenge. Proc Natl Acad Sci U S A 2023; 120:e2221247120. [PMID: 37155897 PMCID: PMC10193994 DOI: 10.1073/pnas.2221247120] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 04/10/2023] [Indexed: 05/10/2023] Open
Abstract
The first clinical efficacy trials of a broadly neutralizing antibody (bNAb) resulted in less benefit than expected and suggested that improvements are needed to prevent HIV infection. While considerable effort has focused on optimizing neutralization breadth and potency, it remains unclear whether augmenting the effector functions elicited by broadly neutralizing antibodies (bNAbs) may also improve their clinical potential. Among these effector functions, complement-mediated activities, which can culminate in the lysis of virions or infected cells, have been the least well studied. Here, functionally modified variants of the second-generation bNAb 10-1074 with ablated and enhanced complement activation profiles were used to examine the role of complement-associated effector functions. When administered prophylactically against simian-HIV challenge in rhesus macaques, more bNAb was required to prevent plasma viremia when complement activity was eliminated. Conversely, less bNAb was required to protect animals from plasma viremia when complement activity was enhanced. These results suggest that complement-mediated effector functions contribute to in vivo antiviral activity, and that their engineering may contribute to the further improvements in the efficacy of antibody-mediated prevention strategies.
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Affiliation(s)
| | - David A. Spencer
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR97006
| | - Shilpi Pandey
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR97006
| | - Tracy Ordonez
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR97006
| | - Philip Barnette
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR97006
| | - Yun Yu
- Biostatistics Shared Resources, Knight Cancer Institute, Oregon Health and Science University, Portland, OR97239
- Biostatistics & Bioinformatics Core, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR97006
| | - Lina Gao
- Biostatistics Shared Resources, Knight Cancer Institute, Oregon Health and Science University, Portland, OR97239
- Biostatistics & Bioinformatics Core, Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR97006
| | - Jérémy Dufloo
- Institut Pasteur, Université de Paris, CNRS UMR3569, Virus and Immunity Unit, 75015Paris, France
- Université de Paris, École doctorale BioSPC 562, 75013Paris, France
| | - Timothée Bruel
- Institut Pasteur, Université de Paris, CNRS UMR3569, Virus and Immunity Unit, 75015Paris, France
- Vaccine Research Institute, 94000Créteil, France
| | - Olivier Schwartz
- Institut Pasteur, Université de Paris, CNRS UMR3569, Virus and Immunity Unit, 75015Paris, France
- Vaccine Research Institute, 94000Créteil, France
| | - Margaret E. Ackerman
- Thayer School of Engineering, Dartmouth College, Hanover, NH03755
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth College, Hanover, NH03755
| | - Ann J. Hessell
- Division of Pathobiology and Immunology, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR97006
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16
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Diamos AG, Pardhe MD, Bergeman MH, Kamzina AS, DiPalma MP, Aman S, Chaves A, Lowe K, Kilbourne J, Hogue IB, Mason HS. A self-binding immune complex vaccine elicits strong neutralizing responses against herpes simplex virus in mice. Front Immunol 2023; 14:1085911. [PMID: 37205110 PMCID: PMC10186352 DOI: 10.3389/fimmu.2023.1085911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 04/18/2023] [Indexed: 05/21/2023] Open
Abstract
Introduction It has been known for over half a century that mixing an antigen with its cognate antibody in an immune complex (IC) can enhance antigen immunogenicity. However, many ICs produce inconsistent immune responses, and the use of ICs in the development new vaccines has been limited despite the otherwise widespread success of antibody-based therapeutics. To address this problem, we designed a self-binding recombinant immune complex (RIC) vaccine which mimics the larger ICs generated during natural infection. Materials and methods In this study, we created two novel vaccine candidates: 1) a traditional IC targeting herpes simplex virus 2 (HSV-2) by mixing glycoprotein D (gD) with a neutralizing antibody (gD-IC); and 2) an RIC consisting of gD fused to an immunoglobulin heavy chain and then tagged with its own binding site, allowing self-binding (gD-RIC). We characterized the complex size and immune receptor binding characteristics in vitro for each preparation. Then, the in vivo immunogenicity and virus neutralization of each vaccine were compared in mice. Results gD-RIC formed larger complexes which enhanced C1q receptor binding 25-fold compared to gD-IC. After immunization of mice, gD-RIC elicited up to 1,000-fold higher gD-specific antibody titers compared to traditional IC, reaching endpoint titers of 1:500,000 after two doses without adjuvant. The RIC construct also elicited stronger virus-specific neutralization against HSV-2, as well as stronger cross-neutralization against HSV-1, although the proportion of neutralizing antibodies to total antibodies was somewhat reduced in the RIC group. Discussion This work demonstrates that the RIC system overcomes many of the pitfalls of traditional IC, providing potent immune responses against HSV-2 gD. Based on these findings, further improvements to the RIC system are discussed. RIC have now been shown to be capable of inducing potent immune responses to a variety of viral antigens, underscoring their broad potential as a vaccine platform.
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Affiliation(s)
- Andrew G. Diamos
- Center for Immunotherapy, Vaccines, and Virotherapy, Biodesign Institute at Arizona State University (ASU), School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | | | | | | | | | | | | | | | | | - Ian B. Hogue
- Center for Immunotherapy, Vaccines, and Virotherapy, Biodesign Institute at Arizona State University (ASU), School of Life Sciences, Arizona State University, Tempe, AZ, United States
| | - Hugh S. Mason
- Center for Immunotherapy, Vaccines, and Virotherapy, Biodesign Institute at Arizona State University (ASU), School of Life Sciences, Arizona State University, Tempe, AZ, United States
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17
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He Y, Ma H, Wang C, Ai Z, Wu Q, Chen H, Lu D. A novel brick for bispecific antibody construction. Proteins 2023. [PMID: 36964928 DOI: 10.1002/prot.26492] [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: 08/02/2022] [Revised: 03/02/2023] [Accepted: 03/14/2023] [Indexed: 03/27/2023]
Abstract
In recent years, the development of bispecific antibodies (bsAbs) has become a major trend in the biopharmaceutical industry. By simultaneously engaging two molecular targets, bsAbs have exhibited unique mechanisms of action that could lead to clinical benefits unattainable by conventional monoclonal antibodies. The type of structure used to construct a bsAb directly influences the distance, angle, degree of freedom, and affinity between the two antibody binding sites and the interaction between the two antigens or the cells where the antigens are located, which have been bound by the antibody. Consequently, the structure of the bsAb is one of the most vital factors affecting its function. Herein, we reported for the first time a novel basic module bsAb format, VFV (Variable domain-Fab-Variable domain). And then, the feasibility of the VFV format was demonstrated by constructing a series of engager-like basic module bsAbs. Next, a series of VFV bsAbs containing Fc (VFV-Ig), Fab (VFV-Fab), or Hinge (VFV-Hinge) were developed based on Hxb module, and all of them had adequate purity and activity. Finally, a T cell engager bsAb with the potential to overcome on-target off-tumor activity was constructed according to the structural characteristics of VFV, which validated that the VFV module can be used as a new brick for the construction of various bsAbs. In a word, the successful construction of this bsAb format for the first time not only enriches the arsenal of the bsAb format, but also provides inspiration for the construction of new bsAbs. Nevertheless, we are fully aware that as a proof-of-concept study, this paper has many shortcomings, and there is still a lot of work to be done to determine whether VFV can serve as a platform for drug development.
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Affiliation(s)
- Yan He
- School of Life Sciences, Fudan University, Shanghai, China
| | - Haili Ma
- LongBio Pharma Co, Shanghai, China
| | - Cong Wang
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Zhilong Ai
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Qiao Wu
- School of Life Sciences, Fudan University, Shanghai, China
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Hongyan Chen
- School of Life Sciences, Fudan University, Shanghai, China
| | - Daru Lu
- School of Life Sciences, Fudan University, Shanghai, China
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18
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Aguinagalde Salazar L, den Boer MA, Castenmiller SM, Zwarthoff SA, de Haas C, Aerts PC, Beurskens FJ, Schuurman J, Heck AJR, van Kessel K, Rooijakkers SHM. Promoting Fc-Fc interactions between anti-capsular antibodies provides strong immune protection against Streptococcus pneumoniae. eLife 2023; 12:e80669. [PMID: 36947116 PMCID: PMC10032657 DOI: 10.7554/elife.80669] [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: 05/30/2022] [Accepted: 03/09/2023] [Indexed: 03/23/2023] Open
Abstract
Streptococcus pneumoniae is the leading cause of community-acquired pneumonia and an important cause of childhood mortality. Despite the introduction of successful vaccines, the global spread of both non-vaccine serotypes and antibiotic-resistant strains reinforces the development of alternative therapies against this pathogen. One possible route is the development of monoclonal antibodies (mAbs) that induce killing of bacteria via the immune system. Here, we investigate whether mAbs can be used to induce killing of pneumococcal serotypes for which the current vaccines show unsuccessful protection. Our study demonstrates that when human mAbs against pneumococcal capsule polysaccharides (CPS) have a poor capacity to induce complement activation, a critical process for immune protection against pneumococci, their activity can be strongly improved by hexamerization-enhancing mutations. Our data indicate that anti-capsular antibodies may have a low capacity to form higher-order oligomers (IgG hexamers) that are needed to recruit complement component C1. Indeed, specific point mutations in the IgG-Fc domain that strengthen hexamerization strongly enhance C1 recruitment and downstream complement activation on encapsulated pneumococci. Specifically, hexamerization-enhancing mutations E430G or E345K in CPS6-IgG strongly potentiate complement activation on S. pneumoniae strains that express capsular serotype 6 (CPS6), and the highly invasive serotype 19A strain. Furthermore, these mutations improve complement activation via mAbs recognizing CPS3 and CPS8 strains. Importantly, hexamer-enhancing mutations enable mAbs to induce strong opsonophagocytic killing by human neutrophils. Finally, passive immunization with CPS6-IgG1-E345K protected mice from developing severe pneumonia. Altogether, this work provides an important proof of concept for future optimization of antibody therapies against encapsulated bacteria.
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Affiliation(s)
| | - Maurits A den Boer
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht UniversityUtrechtNetherlands
- Netherlands Proteomics CenterUtrechtNetherlands
| | - Suzanne M Castenmiller
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
| | - Seline A Zwarthoff
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
| | - Carla de Haas
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
| | - Piet C Aerts
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
| | | | | | - Albert JR Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht UniversityUtrechtNetherlands
- Netherlands Proteomics CenterUtrechtNetherlands
| | - Kok van Kessel
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
| | - Suzan HM Rooijakkers
- Medical Microbiology, University Medical Center Utrecht, Utrecht UniversityUtrechtNetherlands
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19
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Hamdan F, Cerullo V. Cancer immunotherapies: A hope for the uncurable? FRONTIERS IN MOLECULAR MEDICINE 2023; 3:1140977. [PMID: 39086690 PMCID: PMC11285639 DOI: 10.3389/fmmed.2023.1140977] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 02/07/2023] [Indexed: 08/02/2024]
Abstract
The use of cancer immunotherapies is not novel but has been used over the decades in the clinic. Only recently have we found the true potential of stimulating an anti-tumor response after the breakthrough of checkpoint inhibitors. Cancer immunotherapies have become the first line treatment for many malignancies at various stages. Nevertheless, the clinical results in terms of overall survival and progression free survival were not as anticipated. Majority of cancer patients do not respond to immunotherapies and the reasons differ. Hence, further improvements for cancer immunotherapies are crucially needed. In the review, we will discuss various forms of cancer immunotherapies that are being tested or already in the clinic. Moreover, we also highlight future directions to improve such therapies.
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Affiliation(s)
- Firas Hamdan
- Laboratory of Immunovirotherapy, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Drug Delivery, Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Vincenzo Cerullo
- Laboratory of Immunovirotherapy, Drug Research Program, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- TRIMM, Translational Immunology Research Program, University of Helsinki, Helsinki, Finland
- Drug Delivery, Drug Research Program, Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
- iCAN Digital Precision Cancer Medicine Flagship, University of Helsinki, Helsinki, Finland
- Department of Molecular Medicine and Medical Biotechnology and CEINGE, Naples University Federico II, Naples, Italy
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20
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Lim K, Nishide G, Sajidah ES, Yamano T, Qiu Y, Yoshida T, Kobayashi A, Hazawa M, Ando T, Hanayama R, Wong RW. Nanoscopic Assessment of Anti-SARS-CoV-2 Spike Neutralizing Antibody Using High-Speed AFM. NANO LETTERS 2023; 23:619-628. [PMID: 36641798 PMCID: PMC9881159 DOI: 10.1021/acs.nanolett.2c04270] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Anti-spike neutralizing antibodies (S NAbs) have been developed for prevention and treatment against COVID-19. The nanoscopic characterization of the dynamic interaction between spike proteins and S NAbs remains difficult. By using high-speed atomic force microscopy (HS-AFM), we elucidate the molecular property of an S NAb and its interaction with spike proteins. The S NAb appeared as monomers with a Y conformation at low density and formed hexameric oligomers at high density. The dynamic S NAb-spike protein interaction at RBD induces neither RBD opening nor S1 subunit shedding. Furthermore, the interaction was stable at endosomal pH. These findings indicated that the S NAb could have a negligible risk of antibody-dependent enhancement. Dynamic movement of spike proteins on small extracellular vesicles (S sEV) resembled that on SARS-CoV-2. The sensitivity of variant S sEVs to S NAb could be evaluated using HS-AFM. Altogether, we demonstrate a nanoscopic assessment platform for evaluating the binding property of S NAbs.
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Affiliation(s)
- Keesiang Lim
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Goro Nishide
- Division
of Nano Life Science in the Graduate School of Frontier Science Initiative,
WISE Program for Nano-Precision Medicine, Science and Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Elma Sakinatus Sajidah
- Division
of Nano Life Science in the Graduate School of Frontier Science Initiative, Kanazawa University, Kanazawa Ishikawa 920-1192, Japan
| | - Tomoyoshi Yamano
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
- Department
of Immunology, Kanazawa University Graduate
School of Medical Sciences, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8640, Japan
| | - Yujia Qiu
- Division
of Nano Life Science in the Graduate School of Frontier Science Initiative, Kanazawa University, Kanazawa Ishikawa 920-1192, Japan
| | - Takeshi Yoshida
- Department
of Immunology, Kanazawa University Graduate
School of Medical Sciences, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8640, Japan
| | - Akiko Kobayashi
- Cell-Bionomics
Research Unit, Institute for Frontier Science Initiative (INFINITI), Kanazawa University,
Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Masaharu Hazawa
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
- Cell-Bionomics
Research Unit, Institute for Frontier Science Initiative (INFINITI), Kanazawa University,
Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Toshio Ando
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Rikinari Hanayama
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
- Department
of Immunology, Kanazawa University Graduate
School of Medical Sciences, 13-1 Takara-machi, Kanazawa, Ishikawa 920-8640, Japan
| | - Richard W. Wong
- WPI-Nano
Life Science Institute, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
- Cell-Bionomics
Research Unit, Institute for Frontier Science Initiative (INFINITI), Kanazawa University,
Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
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21
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Buhre JS, Pongracz T, Künsting I, Lixenfeld AS, Wang W, Nouta J, Lehrian S, Schmelter F, Lunding HB, Dühring L, Kern C, Petry J, Martin EL, Föh B, Steinhaus M, von Kopylow V, Sina C, Graf T, Rahmöller J, Wuhrer M, Ehlers M. mRNA vaccines against SARS-CoV-2 induce comparably low long-term IgG Fc galactosylation and sialylation levels but increasing long-term IgG4 responses compared to an adenovirus-based vaccine. Front Immunol 2023; 13:1020844. [PMID: 36713457 PMCID: PMC9877300 DOI: 10.3389/fimmu.2022.1020844] [Citation(s) in RCA: 37] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 12/09/2022] [Indexed: 01/15/2023] Open
Abstract
Background The new types of mRNA-containing lipid nanoparticle vaccines BNT162b2 and mRNA-1273 and the adenovirus-based vaccine AZD1222 were developed against SARS-CoV-2 and code for its spike (S) protein. Several studies have investigated short-term antibody (Ab) responses after vaccination. Objective However, the impact of these new vaccine formats with unclear effects on the long-term Ab response - including isotype, subclass, and their type of Fc glycosylation - is less explored. Methods Here, we analyzed anti-S Ab responses in blood serum and the saliva of SARS-CoV-2 naïve and non-hospitalized pre-infected subjects upon two vaccinations with different mRNA- and adenovirus-based vaccine combinations up to day 270. Results We show that the initially high mRNA vaccine-induced blood and salivary anti-S IgG levels, particularly IgG1, markedly decrease over time and approach the lower levels induced with the adenovirus-based vaccine. All three vaccines induced, contrary to the short-term anti-S IgG1 response with high sialylation and galactosylation levels, a long-term anti-S IgG1 response that was characterized by low sialylation and galactosylation with the latter being even below the corresponding total IgG1 galactosylation level. Instead, the mRNA, but not the adenovirus-based vaccines induced long-term IgG4 responses - the IgG subclass with inhibitory effector functions. Furthermore, salivary anti-S IgA levels were lower and decreased faster in naïve as compared to pre-infected vaccinees. Predictively, age correlated with lower long-term anti-S IgG titers for the mRNA vaccines. Furthermore, higher total IgG1 galactosylation, sialylation, and bisection levels correlated with higher long-term anti-S IgG1 sialylation, galactosylation, and bisection levels, respectively, for all vaccine combinations. Conclusion In summary, the study suggests a comparable "adjuvant" potential of the newly developed vaccines on the anti-S IgG Fc glycosylation, as reflected in relatively low long-term anti-S IgG1 galactosylation levels generated by the long-lived plasma cell pool, whose induction might be driven by a recently described TH1-driven B cell response for all three vaccines. Instead, repeated immunization of naïve individuals with the mRNA vaccines increased the proportion of the IgG4 subclass over time which might influence the long-term Ab effector functions. Taken together, these data shed light on these novel vaccine formats and might have potential implications for their long-term efficacy.
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Affiliation(s)
- Jana Sophia Buhre
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Tamas Pongracz
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Inga Künsting
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Anne S. Lixenfeld
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Wenjun Wang
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Jan Nouta
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Selina Lehrian
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Franziska Schmelter
- Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Hanna B. Lunding
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Lara Dühring
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Carsten Kern
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Janina Petry
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Emily L. Martin
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Bandik Föh
- Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Moritz Steinhaus
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany,Department of Anesthesiology and Intensive Care, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Vera von Kopylow
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Christian Sina
- Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Tobias Graf
- Medical Department 2, University Heart Center of Schleswig-Holstein, Lübeck, Germany
| | - Johann Rahmöller
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany,Department of Anesthesiology and Intensive Care, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands,*Correspondence: Manfred Wuhrer, ; Marc Ehlers,
| | - Marc Ehlers
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Medical Center Schleswig-Holstein, Lübeck, Germany,Airway Research Center North (ARCN), University of Lübeck, German Center for Lung Research (DZL), Lübeck, Germany,*Correspondence: Manfred Wuhrer, ; Marc Ehlers,
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22
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Oskam N, Damelang T, Streutker M, Ooijevaar-de Heer P, Nouta J, Koeleman C, Van Coillie J, Wuhrer M, Vidarsson G, Rispens T. Factors affecting IgG4-mediated complement activation. Front Immunol 2023; 14:1087532. [PMID: 36776883 PMCID: PMC9910309 DOI: 10.3389/fimmu.2023.1087532] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/16/2023] [Indexed: 01/27/2023] Open
Abstract
Of the four human immunoglobulin G (IgG) subclasses, IgG4 is considered the least inflammatory, in part because it poorly activates the complement system. Regardless, in IgG4 related disease (IgG4-RD) and in autoimmune disorders with high levels of IgG4 autoantibodies, the presence of these antibodies has been linked to consumption and deposition of complement components. This apparent paradox suggests that conditions may exist, potentially reminiscent of in vivo deposits, that allow for complement activation by IgG4. Furthermore, it is currently unclear how variable glycosylation and Fab arm exchange may influence the ability of IgG4 to activate complement. Here, we used well-defined, glyco-engineered monoclonal preparations of IgG4 and determined their ability to activate complement in a controlled system. We show that IgG4 can activate complement only at high antigen and antibody concentrations, via the classical pathway. Moreover, elevated or reduced Fc galactosylation enhanced or diminished complement activation, respectively, with no apparent contribution from the lectin pathway. Fab glycans slightly reduced complement activation. Lastly, we show that bispecific, monovalent IgG4 resulting from Fab arm exchange is a less potent activator of complement than monospecific IgG4. Taken together, these results imply that involvement of IgG4-mediated complement activation in pathology is possible but unlikely.
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Affiliation(s)
- Nienke Oskam
- Sanquin Research and Landsteiner Laboratory, Department of Immunopathology, Academic Medical Center, Amsterdam, Netherlands
| | - Timon Damelang
- Sanquin Research and Landsteiner Laboratory, Department of Immunopathology, Academic Medical Center, Amsterdam, Netherlands.,Department of Immunohematology Experimental, Sanquin Research, Amsterdam, Netherlands.,Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Marij Streutker
- Sanquin Research and Landsteiner Laboratory, Department of Immunopathology, Academic Medical Center, Amsterdam, Netherlands
| | - Pleuni Ooijevaar-de Heer
- Sanquin Research and Landsteiner Laboratory, Department of Immunopathology, Academic Medical Center, Amsterdam, Netherlands
| | - Jan Nouta
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Carolien Koeleman
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Julie Van Coillie
- Department of Immunohematology Experimental, Sanquin Research, Amsterdam, Netherlands.,Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, Leiden, Netherlands
| | - Gestur Vidarsson
- Department of Immunohematology Experimental, Sanquin Research, Amsterdam, Netherlands.,Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, Netherlands
| | - Theo Rispens
- Sanquin Research and Landsteiner Laboratory, Department of Immunopathology, Academic Medical Center, Amsterdam, Netherlands
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23
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Anti-SARS-Cov-2 S-RBD IgG Formed after BNT162b2 Vaccination Can Bind C1q and Activate Complement. J Immunol Res 2022; 2022:7263740. [PMID: 36573216 PMCID: PMC9789906 DOI: 10.1155/2022/7263740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 11/19/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Background The ability of vaccine-induced antibodies to bind C1q could affect pathogen neutralization. In this study, we investigated C1q binding and subsequent complement activation by anti-spike (S) protein receptor-binding domain (RBD) specific antibodies produced following vaccination with either the mRNA vaccine BNT162b2 or the inactivated vaccine BBIBP-CorV. Methods Serum samples were collected in the period of July 2021-March 2022. Participants' demographic data, type of vaccine, date of vaccination, as well as adverse effects of the vaccine were recorded. The serum samples were incubated with S protein RBD-coated plates. Levels of human IgG, IgA, IgM, C1q, and mannose-binding lectin (MBL) that were bound to the plate, as well as formed C3d, and C5b-9 were compared between different groups of participants. Results A total of 151 samples were collected from vaccinated (n = 116) and nonvaccinated (n = 35) participants. Participants who received either one or two doses of BNT162b2 formed higher levels of anti-RBD IgG and IgA than participants who received BBIBP-CorV. The anti-RBD IgG formed following either vaccine bound C1q, but significantly more C1q binding was observed in participants who received BNT162b2. Subsequently, C5b-9 formation was significantly higher in participants who received BNT162b2, while no significant difference in C5b-9 formation was found between the nonvaccinated and BBIBP-CorV groups. The formation of C5b-9 was strongly correlated to C1q binding and not to MBL binding, additionally, the ratio of formed C5b-9/bound C1q was significantly higher in the BNT162b2 group. Conclusion Anti-RBD IgG formed following vaccination can bind C1q with subsequent complement activation, and the degree of terminal complement pathway activation differed between vaccines, which could play a role in the protection offered by COVID-19 vaccines. Further investigation into the correlation between vaccine protection and vaccine-induced antibodies' ability to activate complement is required.
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24
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Thomas S, Smatti MK, Ouhtit A, Cyprian FS, Almaslamani MA, Thani AA, Yassine HM. Antibody-Dependent Enhancement (ADE) and the role of complement system in disease pathogenesis. Mol Immunol 2022; 152:172-182. [PMID: 36371813 PMCID: PMC9647202 DOI: 10.1016/j.molimm.2022.11.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 11/01/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
Antibody-dependent enhancement (ADE) has been associated with severe disease outcomes in several viral infections, including respiratory infections. In vitro and in vivo studies showed that antibody-response to SARS-CoV and MERS-CoV could exacerbate infection via ADE. Recently in SARS CoV-2, the in vitro studies and structural analysis shows a risk of disease severity via ADE. This phenomenon is partially attributed to non-neutralizing antibodies or antibodies at sub-neutralizing levels. These antibodies result in antigen-antibody complexes' deposition and propagation of a chronic inflammatory process that destroys affected tissues. Further, antigen-antibody complexes may enhance the internalization of the virus into cells through the Fc gamma receptor (FcγR) and lead to further virus replication. Thus, ADE occur via two mechanisms; 1. Antibody mediated replication and 2. Enhanced immune activation. Antibody-mediated effector functions are mainly driven by complement activation, and the first complement in the cascade is complement 1q (C1q) which binds to the virus-antibody complex. Reports say that deficiency in circulating plasma levels of C1q, an independent predictor of mortality in high-risk patients, including diabetes, is associated with severe viral infections. Complement mediated ADE is reported in several viral infections such as dengue, West Nile virus, measles, RSV, Human immunodeficiency virus (HIV), and Ebola virus. This review discusses ADE in viral infections and the in vitro evidence of ADE in coronaviruses. We outline the mechanisms of ADE, emphasizing the role of complements, especially C1q in the outcome of the enhanced disease.
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Affiliation(s)
- Swapna Thomas
- Biomedical Research Center, Qatar University, Qatar; Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Qatar.
| | | | - Allal Ouhtit
- Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Qatar.
| | - Farhan S Cyprian
- Basic Medical Science Department, College of Medicine-QU Health, Qatar University, Qatar.
| | | | - Asmaa Al Thani
- Biomedical Research Center, Qatar University, Qatar; Department of Biomedical Sciences, College of Health Science-QU Health, Qatar University, Qatar.
| | - Hadi M Yassine
- Biomedical Research Center, Qatar University, Qatar; Department of Biomedical Sciences, College of Health Science-QU Health, Qatar University, Qatar.
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25
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Buhre JS, Becker M, Ehlers M. IgG subclass and Fc glycosylation shifts are linked to the transition from pre- to inflammatory autoimmune conditions. Front Immunol 2022; 13:1006939. [PMID: 36405742 PMCID: PMC9669588 DOI: 10.3389/fimmu.2022.1006939] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022] Open
Abstract
A crucial factor for the development of inflammatory autoimmune diseases is the occurrence of antibodies directed against self-tissues and structures, which leads to damage and inflammation. While little is known about the cause of the development of mis-directed, disease-specific T and B cells and resulting IgG autoantibody responses, there is increasing evidence that their induction can occur years before disease symptoms appear. However, a certain proportion of healthy individuals express specific IgG autoantibodies without disease symptoms and not all subjects who generate autoantibodies may develop disease symptoms. Thus, the development of inflammatory autoimmune diseases seems to involve two steps. Increasing evidence suggests that harmless self-directed T and B cell and resulting IgG autoantibody responses in the pre-autoimmune disease stage might switch to more inflammatory T and B cell and IgG autoantibody responses that trigger the inflammatory autoimmune disease stage. Here, we summarize findings on the transition from the pre-disease to the disease stage and vice versa, e.g. by pregnancy and treatment, with a focus on low-/anti-inflammatory versus pro-inflammatory IgG autoantibody responses, including IgG subclass and Fc glycosylation features. Characterization of biomarkers that identify the transition from the pre-disease to the disease stage might facilitate recognition of the ideal time point of treatment initiation and the development of therapeutic strategies for re-directing inflammatory autoimmune conditions.
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Affiliation(s)
- Jana Sophia Buhre
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Mareike Becker
- Department of Dermatology, Allergology, and Venereology, University of Lübeck and University Hospital Schleswig-Holstein, Lübeck, Germany
| | - Marc Ehlers
- Laboratories of Immunology and Antibody Glycan Analysis, Institute of Nutritional Medicine, University of Lübeck and University Hospital Schleswig-Holstein, Lübeck, Germany
- Airway Research Center North, German Center for Lung Research (DZL), University of Lübeck, Lübeck, Germany
- *Correspondence: Marc Ehlers,
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26
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Moghimi SM, Haroon HB, Yaghmur A, Simberg D, Trohopoulos PN. Nanometer- and angstrom-scale characteristics that modulate complement responses to nanoparticles. J Control Release 2022; 351:432-443. [PMID: 36152807 PMCID: PMC10200249 DOI: 10.1016/j.jconrel.2022.09.039] [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: 07/12/2022] [Revised: 09/15/2022] [Accepted: 09/18/2022] [Indexed: 11/26/2022]
Abstract
The contribution of the complement system to non-specific host defence and maintenance of homeostasis is well appreciated. Many particulate systems trigger complement activation but the underlying mechanisms are still poorly understood. Activation of the complement cascade could lead to particle opsonisation by the cleavage products of the third complement protein and might promote inflammatory reactions. Antibody binding in a controlled manner and/or sensing of particles by the complement pattern-recognition molecules such as C1q and mannose-binding lectin can trigger complement activation. Particle curvature and spacing arrangement/periodicity of surface functional groups/ligands are two important parameters that modulate complement responses through multivalent engagement with and conformational regulation of surface-bound antibodies and complement pattern-recognition molecules. Thus, a better fundamental understanding of nanometer- and angstrom-scale parameters that modulate particle interaction with antibodies and complement proteins could portend new possibilities for engineering of particulate drug carriers and biomedical platforms with tuneable complement responses and is discussed here.
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Affiliation(s)
- S Moein Moghimi
- School of Pharmacy, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; Translational and Clinical Research Institute, Faculty of Health and Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK; Colorado Center for Nanomedicine and Nanosafety, University of Colorado Anschutz Medical Center, Aurora, CO, USA.
| | - Hajira B Haroon
- School of Pharmacy, Newcastle University, Newcastle upon Tyne NE1 7RU, UK; Translational and Clinical Research Institute, Faculty of Health and Medical Sciences, Newcastle University, Newcastle upon Tyne NE2 4HH, UK
| | - Anan Yaghmur
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, 2100 Copenhagen Ø, Denmark
| | - Dmitri Simberg
- Colorado Center for Nanomedicine and Nanosafety, University of Colorado Anschutz Medical Center, Aurora, CO, USA; Translational Bio-Nanosciences Laboratory, Department of Pharmaceutical Sciences, Skaggs School of Pharmacy, University of Colorado Anschutz Medical Center, Aurora, CO, USA
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27
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Oostindie SC, Rinaldi DA, Zom GG, Wester MJ, Paulet D, Al-Tamimi K, van der Meijden E, Scheick JR, Wilpshaar T, de Jong B, Hoff-van den Broek M, Grattan RM, Oosterhoff JJ, Vignau J, Verploegen S, Boross P, Beurskens FJ, Lidke DS, Schuurman J, de Jong RN. Logic-gated antibody pairs that selectively act on cells co-expressing two antigens. Nat Biotechnol 2022; 40:1509-1519. [PMID: 35879362 PMCID: PMC9546771 DOI: 10.1038/s41587-022-01384-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/02/2022] [Indexed: 01/11/2023]
Abstract
The use of therapeutic monoclonal antibodies is constrained because single antigen targets often do not provide sufficient selectivity to distinguish diseased from healthy tissues. We present HexElect®, an approach to enhance the functional selectivity of therapeutic antibodies by making their activity dependent on clustering after binding to two different antigens expressed on the same target cell. lmmunoglobulin G (lgG)-mediated clustering of membrane receptors naturally occurs on cell surfaces to trigger complement- or cell-mediated effector functions or to initiate intracellular signaling. We engineer the Fc domains of two different lgG antibodies to suppress their individual homo-oligomerization while promoting their pairwise hetero-oligomerization after binding co-expressed antigens. We show that recruitment of complement component C1q to these hetero-oligomers leads to clustering-dependent activation of effector functions such as complement mediated killing of target cells or activation of cell surface receptors. HexElect allows selective antibody activity on target cells expressing unique, potentially unexplored combinations of surface antigens.
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Affiliation(s)
- Simone C Oostindie
- Genmab, Utrecht, the Netherlands
- Department of Immunology, Leiden University Medical Center, Leiden, the Netherlands
| | - Derek A Rinaldi
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | | | - Michael J Wester
- Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
| | | | | | | | | | | | | | | | - Rachel M Grattan
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA
| | | | | | | | | | | | - Diane S Lidke
- Department of Pathology, University of New Mexico School of Medicine, Albuquerque, NM, USA
- Comprehensive Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM, USA
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28
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Gehlert CL, Rahmati P, Boje AS, Winterberg D, Krohn S, Theocharis T, Cappuzzello E, Lux A, Nimmerjahn F, Ludwig RJ, Lustig M, Rösner T, Valerius T, Schewe DM, Kellner C, Klausz K, Peipp M. Dual Fc optimization to increase the cytotoxic activity of a CD19-targeting antibody. Front Immunol 2022; 13:957874. [PMID: 36119088 PMCID: PMC9471254 DOI: 10.3389/fimmu.2022.957874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 08/12/2022] [Indexed: 12/02/2022] Open
Abstract
Targeting CD19 represents a promising strategy for the therapy of B-cell malignancies. Although non-engineered CD19 antibodies are poorly effective in mediating complement-dependent cytotoxicity (CDC), antibody-dependent cell-mediated cytotoxicity (ADCC) or antibody-dependent cellular phagocytosis (ADCP), these effector functions can be enhanced by Fc-engineering. Here, we engineered a CD19 antibody with the aim to improve effector cell-mediated killing and CDC activity by exchanging selected amino acid residues in the Fc domain. Based on the clinically approved Fc-optimized antibody tafasitamab, which triggers enhanced ADCC and ADCP due to two amino acid exchanges in the Fc domain (S239D/I332E), we additionally added the E345K amino acid exchange to favor antibody hexamerization on the target cell surface resulting in improved CDC. The dual engineered CD19-DEK antibody bound CD19 and Fcγ receptors with similar characteristics as the parental CD19-DE antibody. Both antibodies were similarly efficient in mediating ADCC and ADCP but only the dual optimized antibody was able to trigger complement deposition on target cells and effective CDC. Our data provide evidence that from a technical perspective selected Fc-enhancing mutations can be combined (S239D/I332E and E345K) allowing the enhancement of ADCC, ADCP and CDC with isolated effector populations. Interestingly, under more physiological conditions when the complement system and FcR-positive effector cells are available as effector source, strong complement deposition negatively impacts FcR engagement. Both effector functions were simultaneously active only at selected antibody concentrations. Dual Fc-optimized antibodies may represent a strategy to further improve CD19-directed cancer immunotherapy. In general, our results can help in guiding optimal antibody engineering strategies to optimize antibodies’ effector functions.
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Affiliation(s)
- Carina Lynn Gehlert
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Pegah Rahmati
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Ammelie Svea Boje
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Dorothee Winterberg
- Department of Pediatrics I, University Hospital Schleswig-Holstein and Christian-Albrechts-University Kiel, Kiel, Germany
| | - Steffen Krohn
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Thomas Theocharis
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Elisa Cappuzzello
- Oncology and Immunology Section, Department of Surgery Oncology and Gastroenterology, University of Padova, Padova, Italy
| | - Anja Lux
- Division of Genetics, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Falk Nimmerjahn
- Division of Genetics, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Ralf J. Ludwig
- Lübeck Institute of Experimental Dermatology, University of Lübeck, Lübeck, Germany
| | - Marta Lustig
- Division of Stem Cell Transplantation and Immunotherapy Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Thies Rösner
- Division of Stem Cell Transplantation and Immunotherapy Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Thomas Valerius
- Division of Stem Cell Transplantation and Immunotherapy Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Denis Martin Schewe
- Department of Pediatrics, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Christian Kellner
- Division of Transfusion Medicine, Cell Therapeutics and Haemostaseology, Ludwig-Maximilians-University (LMU) University Hospital Munich, Munich, Germany
| | - Katja Klausz
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
| | - Matthias Peipp
- Division of Antibody-Based Immunotherapy, Department of Medicine II, Christian Albrechts University Kiel and University Medical Center Schleswig-Holstein, Kiel, Germany
- *Correspondence: Matthias Peipp,
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29
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Oosterhoff JJ, Larsen MD, van der Schoot CE, Vidarsson G. Afucosylated IgG responses in humans - structural clues to the regulation of humoral immunity. Trends Immunol 2022; 43:800-814. [PMID: 36008258 PMCID: PMC9395167 DOI: 10.1016/j.it.2022.08.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 11/30/2022]
Abstract
Healthy immune responses require efficient protection without excessive inflammation. Recent discoveries on the degree of fucosylation of a human N-linked glycan at a conserved site in the immunoglobulin IgG-Fc domain might add an additional regulatory layer to adaptive humoral immunity. Specifically, afucosylation of IgG-Fc enhances the interaction of IgG with FcγRIII and thereby its activity. Although plasma IgG is generally fucosylated, afucosylated IgG is raised in responses to enveloped viruses and Plasmodium falciparum proteins expressed on infected erythrocytes, as well as during alloimmune responses. Moreover, while afucosylation can exacerbate some infectious diseases (e.g., COVID-19), it also correlates with traits of protective immunity against malaria and HIV-1. Herein we discuss the implications of IgG afucosylation for health and disease, as well as for vaccination.
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Affiliation(s)
- Janita J Oosterhoff
- Immunoglobulin Research Laboratory, Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands; Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - Mads Delbo Larsen
- Immunoglobulin Research Laboratory, Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands; Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands
| | - C Ellen van der Schoot
- Immunoglobulin Research Laboratory, Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands; Landsteiner Laboratory, Amsterdam University Medical Center (UMC), University of Amsterdam, Amsterdam, The Netherlands
| | - Gestur Vidarsson
- Immunoglobulin Research Laboratory, Department of Experimental Immunohematology, Sanquin Research, Amsterdam, The Netherlands; Department of Biomolecular Mass Spectrometry and Proteomics, Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, Utrecht University, Utrecht, The Netherlands.
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30
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Single-dose HPV vaccine immunity: is there a role for non-neutralizing antibodies? Trends Immunol 2022; 43:815-825. [PMID: 35995705 DOI: 10.1016/j.it.2022.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/28/2022] [Accepted: 07/30/2022] [Indexed: 11/22/2022]
Abstract
A single dose of human papillomavirus (HPV) vaccine against HPV infection (prerequisite for cervical cancer) appears to be as efficacious as two or three doses, despite inducing lower antibody titers. Neutralizing antibodies are thought to be the primary mediator of protection, but the threshold for protection is unknown. Antibody functions beyond neutralization have not been explored for HPV vaccines. Here, we discuss the immune mechanisms of HPV vaccines, with a focus on non-neutralizing antibody effector functions. In the context of single-dose HPV vaccination where antibody is limiting, we propose that non-neutralizing antibody functions may contribute to preventing HPV infection. Understanding the immunological basis of protection for single-dose HPV vaccination will provide a rationale for implementing single-dose HPV vaccine regimens.
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31
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de Vor L, Beudeker CR, Flier A, Scheepmaker LM, Aerts PC, Vijlbrief DC, Bekker MN, Beurskens FJ, van Kessel KPM, de Haas CJC, Rooijakkers SHM, van der Flier M. Monoclonal antibodies effectively potentiate complement activation and phagocytosis of Staphylococcus epidermidis in neonatal human plasma. Front Immunol 2022; 13:933251. [PMID: 35967335 PMCID: PMC9372458 DOI: 10.3389/fimmu.2022.933251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Accepted: 06/29/2022] [Indexed: 12/12/2022] Open
Abstract
Central line associated bloodstream infections (CLABSI) with Staphylococcus epidermidis are a major cause of morbidity in neonates, who have an increased risk of infection because of their immature immune system. As especially preterm neonates suffer from antibody deficiency, clinical studies into preventive therapies have thus far focused on antibody supplementation with pooled intravenous immunoglobulins from healthy donors (IVIG) but with little success. Here we study the potential of monoclonal antibodies (mAbs) against S. epidermidis to induce phagocytic killing by human neutrophils. Nine different mAbs recognizing Staphylococcal surface components were cloned and expressed as human IgG1s. In binding assays, clones rF1, CR5133 and CR6453 showed the strongest binding to S. epidermidis ATCC14990 and CR5133 and CR6453 bound the majority of clinical isolates from neonatal sepsis (19 out of 20). To study the immune-activating potential of rF1, CR5133 and CR6453, bacteria were opsonized with mAbs in the presence or absence of complement. We observed that activation of the complement system is essential to induce efficient phagocytosis of S. epidermidis. Complement activation and phagocytic killing could be enhanced by Fc-mutations that improve IgG1 hexamerization on cellular surfaces. Finally, we studied the ability of the mAbs to activate complement in r-Hirudin neonatal plasma conditions. We show that classical pathway complement activity in plasma isolated from neonatal cord blood is comparable to adult levels. Furthermore, mAbs could greatly enhance phagocytosis of S. epidermidis in neonatal plasma. Altogether, our findings provide insights that are crucial for optimizing anti-S. epidermidis mAbs as prophylactic agents for neonatal CLABSI.
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Affiliation(s)
- Lisanne de Vor
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Coco R. Beudeker
- Department of Paediatric Infectious Diseases and Immunology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Anne Flier
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Lisette M. Scheepmaker
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Piet C. Aerts
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Daniel C. Vijlbrief
- Department of Neonatology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Mireille N. Bekker
- Department of Obstetrics, University Medical Center Utrecht, Utrecht, Netherlands
| | | | - Kok P. M. van Kessel
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | - Carla J. C. de Haas
- Department of Medical Microbiology, University Medical Center Utrecht, Utrecht, Netherlands
| | | | - Michiel van der Flier
- Department of Paediatric Infectious Diseases and Immunology, University Medical Center Utrecht, Utrecht, Netherlands
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32
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Oostindie SC, Lazar GA, Schuurman J, Parren PWHI. Avidity in antibody effector functions and biotherapeutic drug design. Nat Rev Drug Discov 2022; 21:715-735. [PMID: 35790857 PMCID: PMC9255845 DOI: 10.1038/s41573-022-00501-8] [Citation(s) in RCA: 72] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2022] [Indexed: 12/16/2022]
Abstract
Antibodies are the cardinal effector molecules of the immune system and are being leveraged with enormous success as biotherapeutic drugs. A key part of the adaptive immune response is the production of an epitope-diverse, polyclonal antibody mixture that is capable of neutralizing invading pathogens or disease-causing molecules through binding interference and by mediating humoral and cellular effector functions. Avidity - the accumulated binding strength derived from the affinities of multiple individual non-covalent interactions - is fundamental to virtually all aspects of antibody biology, including antibody-antigen binding, clonal selection and effector functions. The manipulation of antibody avidity has since emerged as an important design principle for enhancing or engineering novel properties in antibody biotherapeutics. In this Review, we describe the multiple levels of avidity interactions that trigger the overall efficacy and control of functional responses in both natural antibody biology and their therapeutic applications. Within this framework, we comprehensively review therapeutic antibody mechanisms of action, with particular emphasis on engineered optimizations and platforms. Overall, we describe how affinity and avidity tuning of engineered antibody formats are enabling a new wave of differentiated antibody drugs with tailored properties and novel functions, promising improved treatment options for a wide variety of diseases.
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Affiliation(s)
- Simone C Oostindie
- Genmab, Utrecht, Netherlands.,Department of Immunology, Leiden University Medical Center, Leiden, Netherlands
| | - Greg A Lazar
- Department of Antibody Engineering, Genentech, San Francisco, CA, USA
| | | | - Paul W H I Parren
- Department of Immunology, Leiden University Medical Center, Leiden, Netherlands. .,Sparring Bioconsult, Odijk, Netherlands. .,Lava Therapeutics, Utrecht, Netherlands.
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33
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Oskam N, Ooijevaar-de Heer P, Derksen NIL, Kruithof S, de Taeye SW, Vidarsson G, Reijm S, Kissel T, Toes REM, Rispens T. At Critically Low Antigen Densities, IgM Hexamers Outcompete Both IgM Pentamers and IgG1 for Human Complement Deposition and Complement-Dependent Cytotoxicity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:16-25. [PMID: 35705253 DOI: 10.4049/jimmunol.2101196] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/21/2022] [Indexed: 06/15/2023]
Abstract
IgM is secreted as a pentameric polymer containing a peptide called the joining chain (J chain). However, integration of the J chain is not required for IgM assembly and in its absence IgM predominantly forms hexamers. The conformations of pentameric and hexameric IgM are remarkably similar with a hexagonal arrangement in solution. Despite these similarities, hexameric IgM has been reported to be a more potent complement activator than pentameric IgM, but reported relative potencies vary across different studies. Because of these discrepancies, we systematically investigated human IgM-mediated complement activation. We recombinantly generated pentameric and hexameric human IgM (IgM+J and IgM-J, respectively) mAbs and measured their ability to induce complement deposition and complement-dependent cytotoxicity when bound to several Ags at varying densities. At high Ag densities, hexameric and pentameric IgM activate complement to a similar extent as IgG1. However, at low densities, hexameric IgM outcompeted pentameric IgM and even more so IgG1. These differences became progressively more pronounced as antigenic density became critically low. Our findings highlight that the differential potency of hexameric and pentameric IgM for complement activation is profoundly dependent on the nature of its interactions with Ag. Furthermore, it underscores the importance of IgM in immunity because it is a more potent complement activator than IgG1 at low Ag densities.
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Affiliation(s)
- Nienke Oskam
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands;
| | - Pleuni Ooijevaar-de Heer
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands
| | - Ninotska I L Derksen
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands
| | - Simone Kruithof
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands
| | - Steven W de Taeye
- Department of Experimental Immunohematology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands; and
| | - Gestur Vidarsson
- Department of Experimental Immunohematology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands; and
| | - Sanne Reijm
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
| | - Theresa Kissel
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
| | - René E M Toes
- Department of Rheumatology, Leiden University Medical Center, Leiden, the Netherlands
| | - Theo Rispens
- Department of Immunopathology, Sanquin Research and Landsteiner Laboratory, Academic Medical Center, Amsterdam, the Netherlands
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34
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Nikitin PA, DiMuzio JM, Dowling JP, Patel NB, Bingaman-Steele JL, Heimbach BC, Henriquez N, Nicolescu C, Polley A, Sikorski EL, Howanski RJ, Nath M, Shukla H, Scheaffer SM, Finn JP, Liang LF, Smith T, Storm N, McKay LGA, Johnson RI, Malsick LE, Honko AN, Griffiths A, Diamond MS, Sarma P, Geising DH, Morin MJ, Robinson MK. IMM-BCP-01, a patient-derived anti-SARS-CoV-2 antibody cocktail, is active across variants of concern including Omicron BA.1 and BA.2. Sci Immunol 2022; 7:eabl9943. [PMID: 35771946 PMCID: PMC9273042 DOI: 10.1126/sciimmunol.abl9943] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Monoclonal antibodies are an efficacious therapy against SARS-CoV-2. However, rapid viral mutagenesis, led to escape from most of these therapies, outlining the need for an antibody cocktail with a broad neutralizing potency. Using an unbiased interrogation of the memory B cell repertoire of convalescent COVID-19 patients, we identified human antibodies with broad antiviral activity in vitro and efficacy in vivo against all tested SARS-CoV-2 variants of concern, including Delta, Omicron BA.1 and BA.2. Here, we describe an antibody cocktail IMM-BCP-01, that consists of three patient-derived broadly neutralizing antibodies directed at non-overlapping surfaces on the SARS-CoV-2 spike protein. Two antibodies, IMM20184 and IMM20190, directly blocked Spike binding to the ACE2 receptor. Binding of the third antibody, IMM20253, to its cryptic epitope on the outer surface of RBD, altered the conformation of the Spike Trimer, promoting release of Spike monomers. These antibodies decreased Omicron SARS-CoV-2 infection in the lungs of Syrian golden hamsters in vivo, and potently induced antiviral effector response in vitro, including phagocytosis, ADCC, and complement pathway activation. Our pre-clinical data demonstrated that the three antibody cocktail IMM-BCP-01 could be a promising means for preventing or treating infection of SARS-CoV-2 variants of concern, including Omicron BA.1 and BA.2, in susceptible individuals.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Suzanne M Scheaffer
- Departments of Medicine, Molecular Microbiology, Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | | | | | | | - Nadia Storm
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Lindsay G A McKay
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Rebecca I Johnson
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Lauren E Malsick
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Anna N Honko
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Anthony Griffiths
- Department of Microbiology, Boston University School of Medicine and National Emerging Infectious Diseases Laboratories, Boston, MA, USA
| | - Michael S Diamond
- Departments of Medicine, Molecular Microbiology, Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
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35
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Pre-Clinical In-Vitro Studies on Parameters Governing Immune Complex Formation. Pharmaceutics 2022; 14:pharmaceutics14061254. [PMID: 35745826 PMCID: PMC9227392 DOI: 10.3390/pharmaceutics14061254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/31/2022] [Accepted: 06/06/2022] [Indexed: 02/06/2023] Open
Abstract
The success of biotherapeutics is often challenged by the undesirable events of immunogenicity in patients, characterized by the formation of anti-drug antibodies (ADA). Under specific conditions, the ADAs recognizing the biotherapeutic can trigger the formation of immune complexes (ICs), followed by cascades of subsequent effects on various cell types. Hereby, the connection between the characteristics of ICs and their downstream impact is still not well understood. Factors governing the formation of ICs and the characteristics of these IC species were assessed systematically in vitro. Classic analytical methodologies such as SEC-MALS and SV-AUC, and the state-of-the-art technology mass photometry were applied for the characterization. The study demonstrates a clear interplay between (1) the absolute concentration of the involved components, (2) their molar ratios, (3) structural features of the biologic, (4) and of its endogenous target. This surrogate study design and the associated analytical tool-box is readily applicable to most biotherapeutics and provides valuable insights into mechanisms of IC formation prior to FIH studies. The applicability is versatile—from the detection of candidates with immunogenicity risks during developability assessment to evaluation of the impact of degraded or post-translationally modified biotherapeutics on the formation of ICs.
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36
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Wu D, Robinson CV. Understanding glycoprotein structural heterogeneity and interactions: Insights from native mass spectrometry. Curr Opin Struct Biol 2022; 74:102351. [DOI: 10.1016/j.sbi.2022.102351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 11/25/2022]
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37
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Pande K, Hollingsworth SA, Sam M, Gao Q, Singh S, Saha A, Vroom K, Ma XS, Brazell T, Gorman D, Chen SJ, Raoufi F, Bailly M, Grandy D, Sathiyamoorthy K, Zhang L, Thompson R, Cheng AC, Fayadat-Dilman L, Geierstanger BH, Kingsley LJ. Hexamerization of Anti-SARS CoV IgG1 Antibodies Improves Neutralization Capacity. Front Immunol 2022; 13:864775. [PMID: 35603164 PMCID: PMC9114490 DOI: 10.3389/fimmu.2022.864775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/08/2022] [Indexed: 11/13/2022] Open
Abstract
The SARS-CoV-2 pandemic and particularly the emerging variants have deepened the need for widely available therapeutic options. We have demonstrated that hexamer-enhancing mutations in the Fc region of anti-SARS-CoV IgG antibodies lead to a noticeable improvement in IC50 in both pseudo and live virus neutralization assay compared to parental molecules. We also show that hexamer-enhancing mutants improve C1q binding to target surface. To our knowledge, this is the first time this format has been explored for application in viral neutralization and the studies provide proof-of-concept for the use of hexamer-enhanced IgG1 molecules as potential anti-viral therapeutics.
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Affiliation(s)
- Kalyan Pande
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | | | - Miranda Sam
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Qinshan Gao
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Sujata Singh
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Anasuya Saha
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Karin Vroom
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Xiaohong Shirley Ma
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Tres Brazell
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Dan Gorman
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Shi-Juan Chen
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Fahimeh Raoufi
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - Marc Bailly
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | - David Grandy
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
| | | | - Lan Zhang
- Infectious Disease and Vaccine Discovery, Merck & Co., Inc., West Point, PA, United States
| | - Rob Thompson
- Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, United States
| | - Alan C. Cheng
- Discovery Chemistry, Merck & Co., Inc., South San Francisco, CA, United States
| | | | | | - Laura J. Kingsley
- Discovery Biologics, Merck & Co., Inc., South San Francisco, CA, United States
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38
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Abstract
Native mass spectrometry (MS) involves the analysis and characterization of macromolecules, predominantly intact proteins and protein complexes, whereby as much as possible the native structural features of the analytes are retained. As such, native MS enables the study of secondary, tertiary, and even quaternary structure of proteins and other biomolecules. Native MS represents a relatively recent addition to the analytical toolbox of mass spectrometry and has over the past decade experienced immense growth, especially in enhancing sensitivity and resolving power but also in ease of use. With the advent of dedicated mass analyzers, sample preparation and separation approaches, targeted fragmentation techniques, and software solutions, the number of practitioners and novel applications has risen in both academia and industry. This review focuses on recent developments, particularly in high-resolution native MS, describing applications in the structural analysis of protein assemblies, proteoform profiling of─among others─biopharmaceuticals and plasma proteins, and quantitative and qualitative analysis of protein-ligand interactions, with the latter covering lipid, drug, and carbohydrate molecules, to name a few.
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Affiliation(s)
- Sem Tamara
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Maurits A. den Boer
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
| | - Albert J. R. Heck
- Biomolecular
Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular
Research and Utrecht Institute for Pharmaceutical Sciences, University of Utrecht, Padualaan 8, 3584
CH Utrecht, The Netherlands
- Netherlands
Proteomics Center, Padualaan
8, 3584 CH Utrecht, The Netherlands
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39
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A Factor H-Fc fusion protein increases complement-mediated opsonophagocytosis and killing of community associated methicillin-resistant Staphylococcus aureus. PLoS One 2022; 17:e0265774. [PMID: 35324969 PMCID: PMC8946749 DOI: 10.1371/journal.pone.0265774] [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: 08/23/2021] [Accepted: 03/07/2022] [Indexed: 11/19/2022] Open
Abstract
Staphylococcus aureus employs a multitude of immune-evasive tactics to circumvent host defenses including the complement system, a component of innate immunity central to controlling bacterial infections. With antibiotic resistance becoming increasingly common, there is a dire need for novel therapies. Previously, we have shown that S. aureus binds the complement regulator factor H (FH) via surface protein SdrE to inhibit complement. To address the need for novel therapeutics and take advantage of the FH:SdrE interaction, we examined the effect of a fusion protein comprised of the SdrE-interacting domain of FH coupled with IgG Fc on complement-mediated opsonophagocytosis and bacterial killing of community associated methicillin-resistant S. aureus. S. aureus bound significantly more FH-Fc compared to Fc-control proteins and FH-Fc competed with serum FH for S. aureus binding. FH-Fc treatment increased C3-fragment opsonization of S. aureus for both C3b and iC3b, and boosted generation of the anaphylatoxin C5a. In 5 and 10% serum, FH-Fc treatment significantly increased S. aureus killing by polymorphonuclear cells. This anti-staphylococcal effect was evident in 75% (3/4) of clinical isolates tested. This study demonstrates that FH-Fc fusion proteins have the potential to mitigate the protective effects of bound serum FH rendering S. aureus more vulnerable to the host immune system. Thus, we report the promise of virulence-factor-targeted fusion-proteins as an avenue for prospective anti-staphylococcal therapeutic development.
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40
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High-valency Anti-CD99 Antibodies Toward the Treatment of T Cell Acute Lymphoblastic Leukemia. J Mol Biol 2022; 434:167402. [PMID: 34958778 PMCID: PMC8897262 DOI: 10.1016/j.jmb.2021.167402] [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: 10/18/2021] [Accepted: 12/07/2021] [Indexed: 11/21/2022]
Abstract
T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive form of leukemia that currently requires intensive chemotherapy. While childhood T-ALL is associated with high cure rates, adult T-ALL is not, and both are associated with significant short- and long-term morbidities. Thus, less toxic and effective strategies to treat T-ALL are needed. CD99 is overexpressed on T-ALL blasts at diagnosis and at relapse. Although targeting CD99 with cytotoxic antibodies has been proposed, the molecular features required for their activity are undefined. We identified human antibodies that selectively bound to the extracellular domain of human CD99, and the most potent clone, 10A1, shared an epitope with a previously described cytotoxic IgM antibody. We engineered clone 10A1 in bivalent, trivalent, tetravalent, and dodecavalent formats. Increasing the antibody valency beyond two had no effects on binding to T-ALL cells. In contrast, a valency of ≥3 was required for cytotoxicity, suggesting a mechanism of action in which an antibody clusters ≥3 CD99 molecules to induce cytotoxicity. We developed a human IgG-based tetravalent version of 10A1 that exhibited cytotoxic activity to T-ALL cells but not to healthy peripheral blood cells. The crystal structure of the 10A1 Fab in complex with a CD99 fragment revealed that the antibody primarily recognizes a proline-rich motif (PRM) of CD99 in a manner reminiscent of SH3-PRM interactions. This work further validates CD99 as a promising therapeutic target in T-ALL and defines a pathway toward the development of a selective therapy against T-ALL.
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41
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Frequency chasing of individual megadalton ions in an Orbitrap analyser improves precision of analysis in single-molecule mass spectrometry. Nat Chem 2022; 14:515-522. [PMID: 35273389 PMCID: PMC9068510 DOI: 10.1038/s41557-022-00897-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 01/25/2022] [Indexed: 12/14/2022]
Abstract
To enhance the performance of charge-detection mass spectrometry, we investigated the behaviour of macromolecular single ions on their paths towards and within the Orbitrap analyser. Ions with a mass beyond one megadalton reach a plateau of stability and can be successfully trapped for seconds, travelling a path length of multiple kilometres, thereby enabling precise mass analysis with an effective resolution of greater than 100,000 at a mass-to-charge ratio of 35,000. Through monitoring the frequency of individual ions, we show that these high-mass ions, rather than being lost from the trap, can gradually lose residual solvent molecules and, in rare cases, a single elementary charge. We also demonstrate that the frequency drift of single ions due to desolvation and charge stripping can be corrected, which improves the effective ion sampling 23-fold and gives a twofold improvement in mass precision and resolution. ![]()
The mass precision and resolution in charge-detection mass spectrometry can be improved by correcting frequency drifts of single ions. Now, chasing these individual ions for seconds in an Orbitrap mass spectrometer has revealed the exceptional stability of ultra-high-mass ions, culminating in an effective resolution of greater than 100,000 at m/z = 35,000.
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42
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van Kampen MD, Kuipers-De Wilt LH, van Egmond ML, Reinders-Blankert P, van den Bremer ET, Wang G, Heck AJ, Parren PW, Beurskens FJ, Schuurman J, de Jong RN. Biophysical characterization and stability of modified IgG1 antibodies with different hexamerization propensities. J Pharm Sci 2022; 111:1587-1598. [DOI: 10.1016/j.xphs.2022.02.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 12/18/2022]
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43
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Muneeruddin K, Kaltashov IA, Wang G. Characterizing Soluble Protein Aggregates Using Native Mass Spectrometry Coupled with Temperature-Controlled Electrospray Ionization and Size-Excl usion Chromatography. Methods Mol Biol 2022; 2406:455-468. [PMID: 35089574 DOI: 10.1007/978-1-0716-1859-2_27] [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: 06/14/2023]
Abstract
Characterization of soluble protein aggregates provides valuable information for revealing mechanisms of protein aggregation process and assessing the activity and safety of protein therapeutics. However, the noncovalent interaction, the transient nature and higher degree of structural heterogeneity of the soluble aggregation system hinders precise characterization at the molecular level. Here, we describe methods using native mass spectrometry coupled with temperature-control electrospray ionization and size-exclusion chromatography to monitor the aggregation process and profile the aggregates in detail.
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Affiliation(s)
- Khaja Muneeruddin
- The Mass Spectrometry Facility, University of Massachusetts Medical School, Shrewsbury, MA, USA
| | - Igor A Kaltashov
- Department of Chemistry, University of Massachusetts-Amherst, Amherst, MA, USA
| | - Guanbo Wang
- Biomedical Pioneering Innovation Center, Peking University, Beijing, China.
- Institute for Cell Analysis, Shenzhen Bay Laboratory, Shenzhen, China.
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44
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Larsen MD, Bayarri-Olmos R, Garred P, Hviid L. Enzyme-Linked Immunosorbent Assay for Activation of the Classical Complement Pathway by Plasmodium falciparum-Infected Erythrocyte Surface Antigen-Specific Antibodies. Methods Mol Biol 2022; 2470:673-678. [PMID: 35881382 DOI: 10.1007/978-1-0716-2189-9_50] [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: 06/15/2023]
Abstract
Enzyme-linked immunosorbent assays (ELISA) have a wide range of applications, ranging from specific antibody titer determination to quantification of any biological or non-biological substance with a specific binding partner (usually an antibody). The activity of biological cascades, such as the complement cascade of the innate immune system, can also be assessed by ELISA. We present here an assay optimized for the detection of the activation of the classical complement pathway by polyclonal and monoclonal antibodies (mAbs) specific for Plasmodium falciparum-infected erythrocyte surface antigens.
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Affiliation(s)
- Mads Delbo Larsen
- Department of Experimental Immunohematology, Sanquin Research and Landsteiner Laboratory, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Rafael Bayarri-Olmos
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, Copenhagen, Denmark
| | - Peter Garred
- Laboratory of Molecular Medicine, Department of Clinical Immunology, Rigshospitalet, Copenhagen, Denmark
| | - Lars Hviid
- Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
- Department of Infectious Diseases, Rigshospitalet, Copenhagen, Denmark.
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45
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Yamaguchi Y, Wakaizumi N, Irisa M, Maruno T, Shimada M, Shintani K, Nishiumi H, Yogo R, Yanaka S, Higo D, Torisu T, Kato K, Uchiyama S. The Fab portion of immunoglobulin G has sites in the CL domain that interact with Fc gamma receptor IIIa. MAbs 2022; 14:2038531. [PMID: 35291930 PMCID: PMC8932917 DOI: 10.1080/19420862.2022.2038531] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/16/2022] [Accepted: 02/02/2022] [Indexed: 02/02/2023] Open
Abstract
The interaction between IgG and Fc gamma receptor IIIa (FcγRIIIa) is essential for mediating immune responses. Recent studies have shown that the antigen binding fragment (Fab) and Fc are involved in IgG-FcγRIII interactions. Here, we conducted bio-layer interferometry (BLI) and isothermal titration calorimetry to measure the kinetic and thermodynamic parameters that define the role of Fab in forming the IgG-FcγRIII complex using several marketed therapeutic antibodies. Moreover, hydrogen/deuterium exchange mass spectrometry (HDX-MS) and crosslinking mass spectrometry (XL-MS) were used to clarify the interaction sites and structural changes upon formation of these IgG-FcγRIII complexes. The results showed that Fab in IgG facilitates the interaction via slower dissociation and a larger enthalpy gain. However, a larger entropy loss led to only a marginal change in the equilibrium dissociation constant. Combined HDX-MS and XL-MS analysis revealed that the CL domain of Fab in IgG was in close proximity to FcγRIIIa, indicating that this domain specifically interacts with the extracellular membrane-distal domain (D1) and membrane-proximal domain (D2) of FcγRIIIa. Together with previous studies, these results demonstrate that IgG-FcγRIII interactions are predominantly mediated by the binding of Fc to D2, and the Fab-FcγRIII interaction stabilizes complex formation. These interaction schemes were essentially fucosylation-independent, with Fc-D2 interactions enhanced by afucosylation and the contribution of Fab slightly reduced. Furthermore, the influence of antigen binding on IgG-FcγRIII interactions was also investigated. Combined BLI and HDX-MS results indicate that structural alterations in Fab caused by antigen binding facilitate stabilization of IgG-FcγRIII interactions. This report provides a comprehensive understanding of the interaction between IgG and FcγRIII.
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Affiliation(s)
- Yuki Yamaguchi
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | | | - Mine Irisa
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Takahiro Maruno
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Mari Shimada
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Koya Shintani
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Haruka Nishiumi
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Rina Yogo
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Aichi, Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, Aichi, Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan
| | - Saeko Yanaka
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Aichi, Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, Aichi, Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan
| | | | - Tetsuo Torisu
- Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Koichi Kato
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Aichi, Japan
- Institute for Molecular Science (IMS), National Institutes of Natural Sciences, Aichi, Japan
- Graduate School of Pharmaceutical Sciences, Nagoya City University, Aichi, Japan
| | - Susumu Uchiyama
- Graduate School of Engineering, Osaka University, Osaka, Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Aichi, Japan
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46
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den Boer MA, Lai SH, Xue X, van Kampen MD, Bleijlevens B, Heck AJR. Comparative Analysis of Antibodies and Heavily Glycosylated Macromolecular Immune Complexes by Size-Exclusion Chromatography Multi-Angle Light Scattering, Native Charge Detection Mass Spectrometry, and Mass Photometry. Anal Chem 2021; 94:892-900. [PMID: 34939405 PMCID: PMC8771642 DOI: 10.1021/acs.analchem.1c03656] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Qualitative and quantitative mass analysis of antibodies and related macromolecular immune complexes is a prerequisite for determining their identity, binding partners, stoichiometries, and affinities. A plethora of bioanalytical technologies exist to determine such characteristics, typically based on size, interaction with functionalized surfaces, light scattering, or direct mass measurements. While these methods are highly complementary, they also exhibit unique strengths and weaknesses. Here, we benchmark mass photometry (MP), a recently introduced technology for mass measurement, against native mass spectrometry (MS) and size exclusion chromatography multi-angle light scattering (SEC-MALS). We examine samples of variable complexity, namely, IgG4Δhinge dimerizing half-bodies, IgG-RGY hexamers, heterogeneously glycosylated IgG:sEGFR antibody-antigen complexes, and finally megadalton assemblies involved in complement activation. We thereby assess the ability to determine (1) binding affinities and stoichiometries, (2) accurate masses, for extensively glycosylated species, and (3) assembly pathways of large heterogeneous immune complexes. We find that MP provides a sensitive approach for characterizing antibodies and stable assemblies, with dissociation correction enabling us to expand the measurable affinity range. In terms of mass resolution and accuracy, native MS performs the best but is occasionally hampered by artifacts induced by electrospray ionization, and its resolving power diminishes when analyzing extensively glycosylated proteins. In the latter cases, MP performs well, but single-particle charge detection MS can also be useful in this respect, measuring masses of heterogeneous assemblies even more accurately. Both methods perform well compared to SEC-MALS, still being the most established method in biopharma. Together, our data highlight the complementarity of these approaches, each having its unique strengths and weaknesses.
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Affiliation(s)
- Maurits A den Boer
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Szu-Hsueh Lai
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Xiaoguang Xue
- Genmab, Uppsalalaan 15, 3584 CT Utrecht, The Netherlands
| | | | | | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
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47
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Generation of a Universal Human Complement Source by Large-Scale Depletion of IgG and IgM from Pooled Human Plasma. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2021; 2414:341-362. [PMID: 34784045 DOI: 10.1007/978-1-0716-1900-1_18] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Complement is a key component of functional immunological assays used to evaluate vaccine-mediated immunity to a range of bacterial and viral pathogens. However, standardization of these assays is complicated due to the availability of a human complement source that lacks existing antibodies acquired either through vaccination or natural circulation of the pathogen of interest. We have developed a method for depleting both IgG and IgM in 200 mL batches from pooled hirudin-derived human plasma by sequential affinity chromatography using a Protein G Sepharose column followed by POROS™ CaptureSelect™ IgM Affinity resin. The production of large IgG- and IgM-depleted batches of human plasma that retains total hemolytic and alternative pathway activities allows for improved assay standardization and comparison of immune responses in large clinical trials.
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48
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Greisch JF, den Boer MA, Lai SH, Gallagher K, Bondt A, Commandeur J, Heck AJR. Extending Native Top-Down Electron Capture Dissociation to MDa Immunoglobulin Complexes Provides Useful Sequence Tags Covering Their Critical Variable Complementarity-Determining Regions. Anal Chem 2021; 93:16068-16075. [PMID: 34813704 PMCID: PMC8655740 DOI: 10.1021/acs.analchem.1c03740] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
![]()
Native top-down mass
spectrometry (MS) is gaining traction for
the analysis and sequencing of intact proteins and protein assemblies,
giving access to their mass and composition, as well as sequence information
useful for identification. Herein, we extend and apply native top-down
MS, using electron capture dissociation, to two submillion Da IgM-
and IgG-based oligomeric immunoglobulins. Despite structural similarities,
these two systems are quite different. The ∼895 kDa noncovalent
IgG hexamer consists of six IgG subunits hexamerizing in solution
due to three specifically engineered mutations in the Fc region, whereas
the ∼935 kDa IgM oligomer results from the covalent assembly
of one joining (J) chain and 5 IgM subunits into an asymmetric “pentamer”
stabilized by interchain disulfide bridges. Notwithstanding their
size, structural differences, and complexity, we observe that their
top-down electron capture dissociation spectra are quite similar and
straightforward to interpret, specifically providing informative sequence
tags covering the highly variable CDR3s and FR4s of the Ig subunits
they contain. Moreover, we show that the electron capture dissociation
fragmentation spectra of immunoglobulin oligomers are essentially
identical to those obtained for their respective monomers. Demonstrated
for recombinantly produced systems, the approach described here opens
up new prospects for the characterization and identification of IgMs
circulating in plasma, which is important since IgMs play a critical
role in the early immune response to pathogens such as viruses and
bacteria.
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Affiliation(s)
- Jean-Francois Greisch
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Maurits A den Boer
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Szu-Hsueh Lai
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Kelly Gallagher
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Albert Bondt
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Jan Commandeur
- MSVision, Televisieweg 40, 1322 AM Almere, The Netherlands
| | - Albert J R Heck
- Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute of Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.,Netherlands Proteomics Center, Padualaan 8, 3584 CH Utrecht, The Netherlands
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49
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Nawab DH. Vaccinal antibodies: Fc antibody engineering to improve the antiviral antibody response and induce vaccine-like effects. Hum Vaccin Immunother 2021; 17:5532-5545. [PMID: 34844516 PMCID: PMC8903937 DOI: 10.1080/21645515.2021.1985891] [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: 04/25/2021] [Accepted: 09/21/2021] [Indexed: 10/19/2022] Open
Abstract
The coronavirus disease 2019 (COVID-19) pandemic highlights the urgent clinical need for efficient virus therapies and vaccines. Although the functional importance of antibodies is indisputable in viral infections, there are still significant unmet needs that require vast improvements in antibody-based therapeutics. The IgG Fc domain can be engineered to produce antibodies with tailored and potent responses that will meet these clinical demands. Engaging Fc receptors (FcRs) to perform effector functions as cytotoxicity, phagocytosis, complement activation, intracellular neutralization and controlling antibody persistence. Furthermore, it produces vaccine-like effects by activating signals to stimulate T-cell responses, have proven to be required for protection, as neutralization alone does not off the full protection capacity of antibodies. This review highlights antiviral Fc functions and FcRs' contributions in linking innate and adaptive immunity against viral threats. Moreover, it provides the latest Fc engineering strategies to improve the safety and efficacy of human antiviral antibodies and vaccines.
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Affiliation(s)
- Dhuha H Nawab
- Pharmacy Department, Ministry of Health, Saudi Arabia
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50
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Opolka-Hoffmann E, Jordan G, Otteneder M, Kieferle R, Lechmann M, Winter G, Staack RF. The impact of immunogenicity on therapeutic antibody pharmacokinetics: A preclinical evaluation of the effect of immune complex formation and antibody effector function on clearance. MAbs 2021; 13:1995929. [PMID: 34763611 PMCID: PMC8726625 DOI: 10.1080/19420862.2021.1995929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The occurrence of an immune response against therapeutic proteins poses a major risk for the development of biologics and for successful treatment of patients. Generation of anti-drug antibodies (ADAs) can lead to formation of immune complexes (ICs), consisting of drug and ADAs, with potential impact on safety, efficacy and exposure. Here, we focus on the effects of IC formation, i.e., specific IC sizes, ADA and drug properties, on drug pharmacokinetics. Pre-formed IC preparations of an IgG1 drug (with wild type or with an ablated effector function at the Fc domain) and different ADA surrogates (directed against the complementarity-determining regions or Fc domain of the drug) were administered to rats and collected serum was analyzed to determine the total drug concentration. A combination of size-exclusion chromatography and ELISA enabled a size-specific evaluation of IC profiles in serum and their changes over time. Within five minutes, total drug concentration decreased by ~20–60% when the drug was complexed. Independent of the ADA surrogate and drug variant used, increasing IC size led to increased clearance. Comparing ICs formed with the same ADA surrogate but different IgG1 variants, we observed that complexed drug with a wildtype Fc domain showed faster clearance compared to immune effector function modified drug. Data generated in this study indicated that clearance of drug due to ADA generation is driven by size and structure of the formed ICs, but also by the immune effector functions of the Fc domains of IgGs. Abbreviations Ab: antibody, ADA: anti-drug antibody, AUC: area under the curve, Bi: biotin, CDR: complementary-determining region, cmax: maximal concentration, Dig: digoxigenin, ELISA: enzyme-linked immunosorbent assay, Fc: fragment crystallizable, FcRn: neonatal Fc receptor, HMW: high molecular weight, IC: immune complex, IC-QC: immune complex quality control, IgG: immunoglobulin G, mAb: monoclonal antibody, mADA: monoclonal ADA, pAb: polyclonal antibody, pADA: polyclonal ADA, PD: pharmacodynamics; PK: pharmacokinetic, QC: quality control, SEC: size-exclusion chromatography, WT: wildtype
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Affiliation(s)
- Eugenia Opolka-Hoffmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Gregor Jordan
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Michael Otteneder
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Basel, Basel, Switzerland
| | - Robin Kieferle
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Martin Lechmann
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
| | - Gerhard Winter
- Department of Pharmacy, Pharmaceutical Technology & Biopharmaceutics, Ludwig-Maximilians-University, Munich, Germany
| | - Roland F Staack
- Roche Pharma Research and Early Development, Pharmaceutical Sciences, Roche Innovation Center Munich, Penzberg, Germany
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