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Hesen N, Anany M, Freidel A, Baker M, Siegmund D, Zaitseva O, Wajant H, Lang I. Genetically engineered IgG1 and nanobody oligomers acquire strong intrinsic CD40 agonism. Bioengineered 2024; 15:2302246. [PMID: 38214443 DOI: 10.1080/21655979.2024.2302246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 12/08/2023] [Indexed: 01/13/2024] Open
Abstract
Most anti-CD40 antibodies show robust agonism only upon binding to FcγR+ cells, such as B cells, macrophages, or DCs, but a few anti-CD40 antibodies display also strong intrinsic agonism dependent on the recognized epitope and/or isotype. It is worth mentioning, however, that also the anti-CD40 antibodies with intrinsic agonism can show a further increase in agonistic activity when bound by FcγR-expressing cells. Thus, conventional antibodies appear not to be sufficient to trigger the maximum possible CD40 activation independent from FcγR-binding. We proved here the hypothesis that oligomeric and oligovalent anti-CD40 antibody variants generated by genetic engineering display high intrinsic, thus FcγR-independent, agonistic activity. We generated tetra-, hexa- and dodecavalent variants of six anti-CD40 antibodies and a CD40-specific nanobody. All these oligovalent variants, even when derived of bivalent antagonistic anti-CD40 antibodies, showed strongly enhanced CD40 agonism compared to their conventional counterparts. In most cases, the CD40 agonism reached the maximum response induced by FcγR-bound anti-CD40 antibodies or membrane CD40L, the natural engager of CD40. In sum, our data show that increasing the valency of anti-CD40 antibody constructs by genetic engineering regularly results in molecules with high intrinsic agonism and level out the specific limitations of the parental antibodies.
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Affiliation(s)
- Nienke Hesen
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Mohamed Anany
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
- Department of Microbial Biotechnology, Institute of Biotechnology, National Research Center, Giza, Egypt
| | - Andre Freidel
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Mediya Baker
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Daniela Siegmund
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Olena Zaitseva
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Harald Wajant
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
| | - Isabell Lang
- Division of Molecular Internal Medicine, Department of Internal Medicine II, University Hospital Würzburg, Würzburg Germany
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2
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Lim SH, Beers SA, Al-Shamkhani A, Cragg MS. Agonist Antibodies for Cancer Immunotherapy: History, Hopes, and Challenges. Clin Cancer Res 2024; 30:1712-1723. [PMID: 38153346 PMCID: PMC7615925 DOI: 10.1158/1078-0432.ccr-23-1014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/31/2023] [Accepted: 12/11/2023] [Indexed: 12/29/2023]
Abstract
Immunotherapy is among the most promising new treatment modalities to arise over the last two decades; antibody drugs are delivering immunotherapy to millions of patients with many different types of cancer. Initial success with antibody therapeutics came in the form of direct targeting or cytotoxic antibodies, such as rituximab and trastuzumab, which bind directly to tumor cells to elicit their destruction. These were followed by immunomodulatory antibodies that elicit antitumor responses by either stimulating immune cells or relieving tumor-mediated suppression. By far the most successful approach in the clinic to date has been relieving immune suppression, with immune checkpoint blockade now a standard approach in the treatment of many cancer types. Despite equivalent and sometimes even more impressive effects in preclinical models, agonist antibodies designed to stimulate the immune system have lagged behind in their clinical translation. In this review, we document the main receptors that have been targeted by agonist antibodies, consider the various approaches that have been evaluated to date, detail what we have learned, and consider how their anticancer potential can be unlocked.
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Affiliation(s)
- Sean H. Lim
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, SO16 6YD, UK
| | - Stephen A. Beers
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, SO16 6YD, UK
| | - Aymen Al-Shamkhani
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, SO16 6YD, UK
| | - Mark S. Cragg
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, SO16 6YD, UK
- Institute for Life Sciences, University of Southampton, Southampton, SO17 1BJ, UK
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3
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Beckmann K, Reitinger C, Yan X, Carle A, Blümle E, Jurkschat N, Paulmann C, Prassl S, Kazandjian LV, Loré K, Nimmerjahn F, Fischer S. Fcγ-Receptor-Independent Controlled Activation of CD40 Canonical Signaling by Novel Therapeutic Antibodies for Cancer Therapy. Antibodies (Basel) 2024; 13:31. [PMID: 38651411 PMCID: PMC11036229 DOI: 10.3390/antib13020031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 03/04/2024] [Accepted: 03/28/2024] [Indexed: 04/25/2024] Open
Abstract
The activation of CD40-mediated signaling in antigen-presenting cells is a promising therapeutic strategy to promote immune responses against tumors. Most agonistic anti-CD40 antibodies currently in development require the Fcγ-receptor (FcγR)-mediated crosslinking of CD40 molecules for a meaningful activation of CD40 signaling but have limitations due to dose-limiting toxicities. Here we describe the identification of CD40 antibodies which strongly stimulate antigen-presenting cells in an entirely FcγR-independent manner. These Fc-silenced anti-CD40 antibodies induce an efficient upregulation of costimulatory receptors and cytokine release by dendritic cells. Finally, the most active identified anti-CD40 antibody shows activity in humanized mice. More importantly, there are no signs of obvious toxicities. These studies thus demonstrate the potent activation of antigen-presenting cells with anti-CD40 antibodies lacking FcγR-binding activity and open the possibility for an efficacious and safe combination therapy for cancer patients.
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Affiliation(s)
| | - Carmen Reitinger
- Division of Genetics, Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Xianglei Yan
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, 171 76, Stockholm, Sweden
| | - Anna Carle
- Biontech SE, Forstenrieder Str. 8-14, 82061 Neuried, Germany
| | - Eva Blümle
- Biontech SE, Forstenrieder Str. 8-14, 82061 Neuried, Germany
| | | | | | - Sandra Prassl
- Biontech SE, Forstenrieder Str. 8-14, 82061 Neuried, Germany
| | | | - Karin Loré
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, 171 76, Stockholm, Sweden
| | - Falk Nimmerjahn
- Division of Genetics, Department of Biology, Friedrich-Alexander-University Erlangen-Nürnberg, 91058 Erlangen, Germany
- FAU Profile Centre Immunomedicine, 91054 Erlangen, Germany
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4
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Guo D, De Sciscio ML, Chi-Fung Ng J, Fraternali F. Modelling the assembly and flexibility of antibody structures. Curr Opin Struct Biol 2024; 84:102757. [PMID: 38118364 DOI: 10.1016/j.sbi.2023.102757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/22/2023]
Abstract
Antibodies are large protein assemblies capable of both specifically recognising antigens and engaging with other proteins and receptors to coordinate immune action. Traditionally, structural studies have been dedicated to antibody variable regions, but efforts to determine and model full-length antibody structures are emerging. Here we review the current knowledge on modelling the structures of antibody assemblies, focusing on their conformational flexibility and the challenge this poses to obtaining and evaluating structural models. Integrative modelling approaches, combining experiments (cryo-electron microscopy, mass spectrometry, etc.) and computational methods (molecular dynamics simulations, deep-learning based approaches, etc.), hold the promise to map the complex conformational landscape of full-length antibody structures.
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Affiliation(s)
- Dongjun Guo
- Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6BT, United Kingdom; Randall Centre for Cell & Molecular Biophysics, King's College London, New Hunt's House, Guy's Campus, London, SE1 1UL, United Kingdom
| | - Maria Laura De Sciscio
- Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6BT, United Kingdom; Department of Chemistry, Sapienza University of Rome, P.le A. Moro 5, Rome, 00185, Italy
| | - Joseph Chi-Fung Ng
- Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6BT, United Kingdom
| | - Franca Fraternali
- Institute of Structural and Molecular Biology, University College London, Darwin Building, Gower Street, London, WC1E 6BT, United Kingdom.
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5
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Galvez-Cancino F, Simpson AP, Costoya C, Matos I, Qian D, Peggs KS, Litchfield K, Quezada SA. Fcγ receptors and immunomodulatory antibodies in cancer. Nat Rev Cancer 2024; 24:51-71. [PMID: 38062252 DOI: 10.1038/s41568-023-00637-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/10/2023] [Indexed: 12/24/2023]
Abstract
The discovery of both cytotoxic T lymphocyte-associated antigen 4 (CTLA4) and programmed cell death protein 1 (PD1) as negative regulators of antitumour immunity led to the development of numerous immunomodulatory antibodies as cancer treatments. Preclinical studies have demonstrated that the efficacy of immunoglobulin G (IgG)-based therapies depends not only on their ability to block or engage their targets but also on the antibody's constant region (Fc) and its interactions with Fcγ receptors (FcγRs). Fc-FcγR interactions are essential for the activity of tumour-targeting antibodies, such as rituximab, trastuzumab and cetuximab, where the killing of tumour cells occurs at least in part due to these mechanisms. However, our understanding of these interactions in the context of immunomodulatory antibodies designed to boost antitumour immunity remains less explored. In this Review, we discuss our current understanding of the contribution of FcγRs to the in vivo activity of immunomodulatory antibodies and the challenges of translating results from preclinical models into the clinic. In addition, we review the impact of genetic variability of human FcγRs on the activity of therapeutic antibodies and how antibody engineering is being utilized to develop the next generation of cancer immunotherapies.
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Affiliation(s)
- Felipe Galvez-Cancino
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK
- Cancer Research UK Lung Cancer Centre of Excellence, University College London Cancer Institute, London, UK
| | - Alexander P Simpson
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK
- Cancer Research UK Lung Cancer Centre of Excellence, University College London Cancer Institute, London, UK
| | - Cristobal Costoya
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK
| | - Ignacio Matos
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK
| | - Danwen Qian
- Cancer Research UK Lung Cancer Centre of Excellence, University College London Cancer Institute, London, UK
- Tumour Immunogenomics and Immunosurveillance Laboratory, University College London Cancer Institute, London, UK
| | - Karl S Peggs
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK
| | - Kevin Litchfield
- Cancer Research UK Lung Cancer Centre of Excellence, University College London Cancer Institute, London, UK
- Tumour Immunogenomics and Immunosurveillance Laboratory, University College London Cancer Institute, London, UK
| | - Sergio A Quezada
- Cancer Immunology Unit, Research Department of Haematology, University College London Cancer Institute, London, UK.
- Cancer Research UK Lung Cancer Centre of Excellence, University College London Cancer Institute, London, UK.
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Zhang P, Wang N, Ren D, Jing Z, Sekhar KPC, Hao J, Cui J. Cascade Reaction of Thiol-Disulfide Exchange Potentiates Rapid Fabrication of Polymer Hydrogels. ACS Macro Lett 2023; 12:1437-1442. [PMID: 37819638 DOI: 10.1021/acsmacrolett.3c00482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/13/2023]
Abstract
We report a rapid cross-linking strategy for the fabrication of polymer hydrogels based on a thiol-disulfide cascade reaction. Specifically, thiolated polymers (e.g., poly(ethylene glycol), hyaluronic acid, sodium alginate, poly(acrylic acid), and poly(methylacrylic acid)) can be cross-linked via the trigger of Ellman's reagent, resulting in the rapid formation of hydrogels over 20-fold faster than that via the oxidation in air. The gelation kinetics of hydrogels can be tuned by varying the polymer concentration and the molar ratio of Ellman's reagent and free thiols. The obtained hydrogels can be further functionalized with functional moieties (e.g., targeting ligands) for the selective adhesion of cells. This approach is applicable to various natural and synthetic polymers for the assembly of hydrogels with a minimized gelation time, which is promising for various biological applications.
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Affiliation(s)
- Peiyu Zhang
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Ning Wang
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Dandan Ren
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Zongyu Jing
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Kanaparedu P C Sekhar
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Jingcheng Hao
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
| | - Jiwei Cui
- Key Laboratory of Colloid and Interface Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, Shandong 266237, China
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7
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Dadas O, Allen JD, Buchan SL, Kim J, Chan HTC, Mockridge CI, Duriez PJ, Rogel A, Crispin M, Al-Shamkhani A. Fcγ receptor binding is required for maximal immunostimulation by CD70-Fc. Front Immunol 2023; 14:1252274. [PMID: 37965342 PMCID: PMC10641686 DOI: 10.3389/fimmu.2023.1252274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 10/16/2023] [Indexed: 11/16/2023] Open
Abstract
Introduction T cell expressed CD27 provides costimulation upon binding to inducible membrane expressed trimeric CD70 and is required for protective CD8 T cell responses. CD27 agonists could therefore be used to bolster cellular vaccines and anti-tumour immune responses. To date, clinical development of CD27 agonists has focussed on anti-CD27 antibodies with little attention given to alternative approaches. Methods Here, we describe the generation and activity of soluble variants of CD70 that form either trimeric (t) or dimer-of-trimer proteins and conduct side-by-side comparisons with an agonist anti-CD27 antibody. To generate a dimer-of-trimer protein (dt), we fused three extracellular domains of CD70 to the Fc domain of mouse IgG1 in a 'string of beads' configuration (dtCD70-Fc). Results Whereas tCD70 failed to costimulate CD8 T cells, both dtCD70-Fc and an agonist anti-CD27 antibody were capable of enhancing T cell proliferation in vitro. Initial studies demonstrated that dtCD70-Fc was less efficacious than anti-CD27 in boosting a CD8 T cell vaccine response in vivo, concomitant with rapid clearance of dtCD70-Fc from the circulation. The accelerated plasma clearance of dtCD70-Fc was not due to the lack of neonatal Fc receptor binding but was dependent on the large population of oligomannose type glycosylation. Enzymatic treatment to reduce the oligomannose-type glycans in dtCD70-Fc improved its half-life and significantly enhanced its T cell stimulatory activity in vivo surpassing that of anti-CD27 antibody. We also show that whereas the ability of the anti-CD27 to boost a vaccine response was abolished in Fc gamma receptor (FcγR)-deficient mice, dtCD70-Fc remained active. By comparing the activity of dtCD70-Fc with a variant (dtCD70-Fc(D265A)) that lacks binding to FcγRs, we unexpectedly found that FcγR binding to dtCD70-Fc was required for maximal boosting of a CD8 T cell response in vivo. Interestingly, both dtCD70-Fc and dtCD70-Fc(D265A) were effective in prolonging the survival of mice harbouring BCL1 B cell lymphoma, demonstrating that a substantial part of the stimulatory activity of dtCD70-Fc in this setting is retained in the absence of FcγR interaction. Discussion These data reveal that TNFRSF ligands can be generated with a tunable activity profile and suggest that this class of immune agonists could have broad applications in immunotherapy.
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Affiliation(s)
- Osman Dadas
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- Department of Molecular Biology and Genetics, Faculty of Arts and Sciences, European University of Lefke, Lefke, Cyprus
| | - Joel D. Allen
- School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, United Kingdom
| | - Sarah L. Buchan
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jinny Kim
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - H. T. Claude Chan
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - C. Ian Mockridge
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Patrick J. Duriez
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Anne Rogel
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Max Crispin
- School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, United Kingdom
| | - Aymen Al-Shamkhani
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
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8
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Abstract
The tumor necrosis factor (TNF) receptor superfamily is a structurally and functionally related group of cell surface receptors that play crucial roles in various cellular processes, including apoptosis, cell survival, and immune regulation. This review paper synthesizes key findings from recent studies, highlighting the importance of clustering in TNF receptor superfamily signaling. We discuss the underlying molecular mechanisms of signaling, the functional consequences of receptor clustering, and potential therapeutic implications of targeting surface structures of receptor complexes.
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Affiliation(s)
- Éva S. Vanamee
- Immunobiology Department, Massachusetts General Hospital, Boston, MA, United States
| | - Denise L. Faustman
- Immunobiology Department, Massachusetts General Hospital, Boston, MA, United States
- Harvard Medical School, Boston, MA, United States
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9
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Nimmerjahn F, Vidarsson G, Cragg MS. Effect of posttranslational modifications and subclass on IgG activity: from immunity to immunotherapy. Nat Immunol 2023; 24:1244-1255. [PMID: 37414906 DOI: 10.1038/s41590-023-01544-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 05/15/2023] [Indexed: 07/08/2023]
Abstract
Humoral immune responses are characterized by complex mixtures of polyclonal antibody species varying in their isotype, target epitope specificity and affinity. Posttranslational modifications occurring during antibody production in both the antibody variable and constant domain create further complexity and can modulate antigen specificity and antibody Fc-dependent effector functions, respectively. Finally, modifications of the antibody backbone after secretion may further impact antibody activity. An in-depth understanding of how these posttranslational modifications impact antibody function, especially in the context of individual antibody isotypes and subclasses, is only starting to emerge. Indeed, only a minute proportion of this natural variability in the humoral immune response is currently reflected in therapeutic antibody preparations. In this Review, we summarize recent insights into how IgG subclass and posttranslational modifications impact IgG activity and discuss how these insights may be used to optimize therapeutic antibody development.
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Affiliation(s)
- Falk Nimmerjahn
- Division of Genetics, Friedrich Alexander University Erlangen-Nürnberg, Erlangen, Germany.
| | - 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
| | - Mark S Cragg
- Antibody and Vaccine Group, Centre for Cancer Immunology, School of Cancer Sciences, University of Southampton Faculty of Medicine, Southampton, UK
- Institute for Life Sciences, University of Southampton, Southampton, UK
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10
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Yan X, Ols S, Arcoverde Cerveira R, Lenart K, Hellgren F, Ye K, Cagigi A, Buggert M, Nimmerjahn F, Falkesgaard Højen J, Parera D, Pessara U, Fischer S, Loré K. Cell targeting and immunostimulatory properties of a novel Fcγ-receptor-independent agonistic anti-CD40 antibody in rhesus macaques. Cell Mol Life Sci 2023; 80:189. [PMID: 37353664 PMCID: PMC10289945 DOI: 10.1007/s00018-023-04828-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/11/2023] [Accepted: 06/01/2023] [Indexed: 06/25/2023]
Abstract
Targeting CD40 by agonistic antibodies used as vaccine adjuvants or for cancer immunotherapy is a strategy to stimulate immune responses. The majority of studied agonistic anti-human CD40 antibodies require crosslinking of their Fc region to inhibitory FcγRIIb to induce immune stimulation although this has been associated with toxicity in previous studies. Here we introduce an agonistic anti-human CD40 monoclonal IgG1 antibody (MAB273) unique in its specificity to the CD40L binding site of CD40 but devoid of Fcγ-receptor binding. We demonstrate rapid binding of MAB273 to B cells and dendritic cells resulting in activation in vitro on human cells and in vivo in rhesus macaques. Dissemination of fluorescently labeled MAB273 after subcutaneous administration was found predominantly at the site of injection and specific draining lymph nodes. Phenotypic cell differentiation and upregulation of genes associated with immune activation were found in the targeted tissues. Antigen-specific T cell responses were enhanced by MAB273 when given in a prime-boost regimen and for boosting low preexisting responses. MAB273 may therefore be a promising immunostimulatory adjuvant that warrants future testing for therapeutic and prophylactic vaccination strategies.
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Affiliation(s)
- Xianglei Yan
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Sebastian Ols
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Rodrigo Arcoverde Cerveira
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Klara Lenart
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Fredrika Hellgren
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Kewei Ye
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Alberto Cagigi
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden
- Center of Molecular Medicine, Stockholm, Sweden
| | - Marcus Buggert
- Department of Medicine Huddinge, Center for Infectious Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Falk Nimmerjahn
- Division of Genetics, Department of Biology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Jesper Falkesgaard Højen
- Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
- Department of Medicine, University of Colorado Denver, Aurora, CO, USA
| | | | | | | | - Karin Loré
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Visionsgatan 4, BioClinicum J7:30, 171 64, Stockholm, Sweden.
- Center of Molecular Medicine, Stockholm, Sweden.
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11
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Zhong Q, Xiao X, Qiu Y, Xu Z, Chen C, Chong B, Zhao X, Hai S, Li S, An Z, Dai L. Protein posttranslational modifications in health and diseases: Functions, regulatory mechanisms, and therapeutic implications. MedComm (Beijing) 2023; 4:e261. [PMID: 37143582 PMCID: PMC10152985 DOI: 10.1002/mco2.261] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 03/26/2023] [Accepted: 03/27/2023] [Indexed: 05/06/2023] Open
Abstract
Protein posttranslational modifications (PTMs) refer to the breaking or generation of covalent bonds on the backbones or amino acid side chains of proteins and expand the diversity of proteins, which provides the basis for the emergence of organismal complexity. To date, more than 650 types of protein modifications, such as the most well-known phosphorylation, ubiquitination, glycosylation, methylation, SUMOylation, short-chain and long-chain acylation modifications, redox modifications, and irreversible modifications, have been described, and the inventory is still increasing. By changing the protein conformation, localization, activity, stability, charges, and interactions with other biomolecules, PTMs ultimately alter the phenotypes and biological processes of cells. The homeostasis of protein modifications is important to human health. Abnormal PTMs may cause changes in protein properties and loss of protein functions, which are closely related to the occurrence and development of various diseases. In this review, we systematically introduce the characteristics, regulatory mechanisms, and functions of various PTMs in health and diseases. In addition, the therapeutic prospects in various diseases by targeting PTMs and associated regulatory enzymes are also summarized. This work will deepen the understanding of protein modifications in health and diseases and promote the discovery of diagnostic and prognostic markers and drug targets for diseases.
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Affiliation(s)
- Qian Zhong
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Xina Xiao
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Yijie Qiu
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Zhiqiang Xu
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Chunyu Chen
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Baochen Chong
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Xinjun Zhao
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Shan Hai
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Shuangqing Li
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Zhenmei An
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
| | - Lunzhi Dai
- Department of Endocrinology and MetabolismGeneral Practice Ward/International Medical Center WardGeneral Practice Medical Center and National Clinical Research Center for GeriatricsState Key Laboratory of BiotherapyWest China Hospital, Sichuan UniversityChengduChina
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12
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Davies AM, Beavil RL, Barbolov M, Sandhar BS, Gould HJ, Beavil AJ, Sutton BJ, McDonnell JM. Crystal structures of the human IgD Fab reveal insights into C H1 domain diversity. Mol Immunol 2023; 159:28-37. [PMID: 37267832 DOI: 10.1016/j.molimm.2023.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/17/2023] [Accepted: 05/20/2023] [Indexed: 06/04/2023]
Abstract
Antibodies of the IgD isotype remain the least well characterized of the mammalian immunoglobulin isotypes. Here we report three-dimensional structures for the Fab region of IgD, based on four different crystal structures, at resolutions of 1.45-2.75 Å. These IgD Fab crystals provide the first high-resolution views of the unique Cδ1 domain. Structural comparisons identify regions of conformational diversity within the Cδ1 domain, as well as among the homologous domains of Cα1, Cγ1 and Cμ1. The IgD Fab structure also possesses a unique conformation of the upper hinge region, which may contribute to the overall disposition of the very long linker sequence between the Fab and Fc regions found in human IgD. Structural similarities observed between IgD and IgG, and differences with IgA and IgM, are consistent with predicted evolutionary relationships for the mammalian antibody isotypes.
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Affiliation(s)
- Anna M Davies
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Rebecca L Beavil
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Momchil Barbolov
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Balraj S Sandhar
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Hannah J Gould
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Andrew J Beavil
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - Brian J Sutton
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom
| | - James M McDonnell
- King's College London, Randall Centre for Cell and Molecular Biophysics, New Hunt's House, London SE1 1UL, United Kingdom.
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13
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Dadas O, Ertay A, Cragg MS. Delivering co-stimulatory tumor necrosis factor receptor agonism for cancer immunotherapy: past, current and future perspectives. Front Immunol 2023; 14:1147467. [PMID: 37180119 PMCID: PMC10167284 DOI: 10.3389/fimmu.2023.1147467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 03/27/2023] [Indexed: 05/15/2023] Open
Abstract
The tumor necrosis factor superfamily (TNFSF) and their receptors (TNFRSF) are important regulators of the immune system, mediating proliferation, survival, differentiation, and function of immune cells. As a result, their targeting for immunotherapy is attractive, although to date, under-exploited. In this review we discuss the importance of co-stimulatory members of the TNFRSF in optimal immune response generation, the rationale behind targeting these receptors for immunotherapy, the success of targeting them in pre-clinical studies and the challenges in translating this success into the clinic. The efficacy and limitations of the currently available agents are discussed alongside the development of next generation immunostimulatory agents designed to overcome current issues, and capitalize on this receptor class to deliver potent, durable and safe drugs for patients.
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Affiliation(s)
- Osman Dadas
- Antibody and Vaccine Group, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Ayse Ertay
- School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Mark S. Cragg
- Antibody and Vaccine Group, School of Cancer Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
- Institute for Life Sciences, University of Southampton, Southampton, United Kingdom
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14
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Hoehener C, Engeroff P. Hinge region modification for the engineering of antibody function. Allergy 2023. [PMID: 36805570 DOI: 10.1111/all.15684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 01/18/2023] [Accepted: 02/14/2023] [Indexed: 02/21/2023]
Affiliation(s)
| | - Paul Engeroff
- Department of BioMedical Research, University of Bern, Bern, Switzerland.,Department of Immunology, University Clinic of Rheumatology and Immunology, Inselspital, University of Bern, Bern, Switzerland
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15
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Nikkhoi SK, Li G, Eleya S, Yang G, Vandavasi VG, Hatefi A. Bispecific killer cell engager with high affinity and specificity toward CD16a on NK cells for cancer immunotherapy. Front Immunol 2023; 13:1039969. [PMID: 36685519 PMCID: PMC9852913 DOI: 10.3389/fimmu.2022.1039969] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/30/2022] [Indexed: 01/07/2023] Open
Abstract
Introduction The Fc region of monoclonal antibodies (mAbs) interacts with the CD16a receptor on natural killer (NK) cells with "low affinity" and "low selectivity". This low affinity/selectivity interaction results in not only suboptimal anticancer activity but also induction of adverse effects. CD16a on NK cells binds to the antibody-coated cells, leading to antibody-dependent cell-mediated cytotoxicity (ADCC). Recent clinical data have shown that the increased binding affinity between mAb Fc region and CD16a receptor is responsible for significantly improved therapeutic outcomes. Therefore, the objective of this study was to develop a bispecific killer cell engager (BiKE) with high affinity and specificity/selectivity toward CD16a receptor for NK cell-based cancer immunotherapy. Methods To engineer BiKE, a llama was immunized, then high binding anti-CD16a and anti-HER2 VHH clones were isolated using phage display. ELISA, flow cytometry, and biolayer interferometry (BLI) data showed that the isolated anti-CD16a VHH has high affinity (sub-nanomolar) toward CD16a antigen without cross-reactivity with CD16b-NA1 on neutrophils or CD32b on B cells. Similarly, the data showed that the isolated anti-HER2 VHH has high affinity/specificity toward HER2 antigen. Using a semi-flexible linker, anti-HER2 VHH was recombinantly fused with anti-CD16a VHH to create BiKE:HER2/CD16a. Then, the ability of BiKE:HER2/CD16a to activate NK cells to release cytokines and kill HER2+ cancer cells was measured. As effector cells, both high-affinity haNK92 (CD16+, V176) and low-affinity laNK92 (CD16+, F176) cells were used. Results and discussion The data showed that the engineered BiKE:HER2/CD16a activates haNK92 and laNK92 cells to release cytokines much greater than best-in-class mAbs in the clinic. The cytotoxicity data also showed that the developed BiKE induces higher ADCC to both ovarian and breast cancer cells in comparison to Trazimera™ (trastuzumab). According to the BLI data, BiKE:HER2/CD16 recognizes a different epitope on CD16a antigen than IgG-based mAbs; thus, it provides the opportunity for not only monotherapy but also combination therapy with other antibody drugs such as checkpoint inhibitors and antibody-drug conjugates. Taken together, the data demonstrate the creation of a novel BiKE with high affinity and specificity toward CD16a on NK cells with the potential to elicit a superior therapeutic response in patients with HER2+ cancer than existing anti-HER2 mAbs.
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Affiliation(s)
| | - Geng Li
- Department of Pharmaceutics, Rutgers University, Piscataway, NJ, United States
| | - Suha Eleya
- Department of Pharmaceutics, Rutgers University, Piscataway, NJ, United States
| | - Ge Yang
- Department of Pharmaceutics, Rutgers University, Piscataway, NJ, United States
| | - Venu Gopal Vandavasi
- Department of Chemistry, Biophysics Core Facility, Princeton University, Princeton, NJ, United States
| | - Arash Hatefi
- Department of Pharmaceutics, Rutgers University, Piscataway, NJ, United States
- Cancer Pharmacology Program, Cancer Institute of New Jersey, Rutgers University, New Brunswick, NJ, United States
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16
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Claus C, Ferrara-Koller C, Klein C. The emerging landscape of novel 4-1BB (CD137) agonistic drugs for cancer immunotherapy. MAbs 2023; 15:2167189. [PMID: 36727218 PMCID: PMC9897756 DOI: 10.1080/19420862.2023.2167189] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 01/05/2023] [Accepted: 01/06/2023] [Indexed: 02/03/2023] Open
Abstract
The clinical development of 4-1BB agonists for cancer immunotherapy has raised substantial interest during the past decade. The first generation of 4-1BB agonistic antibodies entering the clinic, urelumab (BMS-663513) and utomilumab (PF-05082566), failed due to (liver) toxicity or lack of efficacy, respectively. The two antibodies display differences in the affinity and the 4-1BB receptor epitope recognition, as well as the isotype, which determines the Fc-gamma-receptor (FcγR) crosslinking activity. Based on this experience a very diverse landscape of second-generation 4-1BB agonists addressing the liabilities of first-generation agonists has recently been developed, with many entering clinical Phase 1 and 2 studies. This review provides an overview focusing on differences and their scientific rationale, as well as challenges foreseen during the clinical development of these molecules.
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Affiliation(s)
- Christina Claus
- Roche Innovation Center Zurich, Roche Pharma Research and Early Development (pRED), Schlieren, Switzerland
| | - Claudia Ferrara-Koller
- Roche Innovation Center Zurich, Roche Pharma Research and Early Development (pRED), Schlieren, Switzerland
| | - Christian Klein
- Roche Innovation Center Zurich, Roche Pharma Research and Early Development (pRED), Schlieren, Switzerland
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17
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Troisi M, Marini E, Abbiento V, Stazzoni S, Andreano E, Rappuoli R. A new dawn for monoclonal antibodies against antimicrobial resistant bacteria. Front Microbiol 2022; 13:1080059. [PMID: 36590399 PMCID: PMC9795047 DOI: 10.3389/fmicb.2022.1080059] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 11/21/2022] [Indexed: 12/15/2022] Open
Abstract
Antimicrobial resistance (AMR) is a quickly advancing threat for human health worldwide and almost 5 million deaths are already attributable to this phenomenon every year. Since antibiotics are failing to treat AMR-bacteria, new tools are needed, and human monoclonal antibodies (mAbs) can fill this role. In almost 50 years since the introduction of the first technology that led to mAb discovery, enormous leaps forward have been made to identify and develop extremely potent human mAbs. While their usefulness has been extensively proved against viral pathogens, human mAbs have yet to find their space in treating and preventing infections from AMR-bacteria and fully conquer the field of infectious diseases. The novel and most innovative technologies herein reviewed can support this goal and add powerful tools in the arsenal of weapons against AMR.
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Affiliation(s)
- Marco Troisi
- Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena, Italy
| | - Eleonora Marini
- Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena, Italy
| | - Valentina Abbiento
- Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena, Italy
| | - Samuele Stazzoni
- Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena, Italy
| | - Emanuele Andreano
- Monoclonal Antibody Discovery (MAD) Laboratory, Fondazione Toscana Life Sciences, Siena, Italy,*Correspondence: Emanuele Andreano
| | - Rino Rappuoli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, Siena, Italy,Fondazione Biotecnopolo di Siena, Siena, Italy,Rino Rappuoli
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18
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Werner A, Nimmerjahn F. HINGEneering IgG for enhanced immune activation. Sci Immunol 2022; 7:eabq4797. [PMID: 35857582 DOI: 10.1126/sciimmunol.abq4797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Two recent studies in
Science Immunology
by Orr
et al.
and Foss
et al.
demonstrate that the hinge region of immunoglobulin G (IgG) is a major regulator of IgG2 and IgG3 activity, respectively. Engineering of the IgG hinge may therefore be useful for optimizing the activity of IgG subclasses.
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Affiliation(s)
- Anja Werner
- Division of Genetics, Department of Biology, Friedrich-Alexander University Erlangen-Nürnberg, Erwin-Rommelstr. 3, Erlangen 91058, Germany
| | - Falk Nimmerjahn
- Division of Genetics, Department of Biology, Friedrich-Alexander University Erlangen-Nürnberg, Erwin-Rommelstr. 3, Erlangen 91058, Germany
- Medical Immunology Campus Erlangen, Friedrich-Alexander University Erlangen-Nürnberg, Erwin-Rommelstr. 3, Erlangen 91058, Germany
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