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Geuijen CAW, De Nardis C, Maussang D, Rovers E, Gallenne T, Hendriks LJA, Visser T, Nijhuis R, Logtenberg T, de Kruif J, Gros P, Throsby M. Unbiased Combinatorial Screening Identifies a Bispecific IgG1 that Potently Inhibits HER3 Signaling via HER2-Guided Ligand Blockade. Cancer Cell 2021; 39:1163-1164. [PMID: 34375611 DOI: 10.1016/j.ccell.2021.07.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fouët G, Gout E, Wicker-Planquart C, Bally I, De Nardis C, Dedieu S, Chouquet A, Gaboriaud C, Thielens NM, Kleman JP, Rossi V. Complement C1q Interacts With LRP1 Clusters II and IV Through a Site Close but Different From the Binding Site of Its C1r and C1s-Associated Proteases. Front Immunol 2020; 11:583754. [PMID: 33193398 PMCID: PMC7609443 DOI: 10.3389/fimmu.2020.583754] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 09/28/2020] [Indexed: 11/13/2022] Open
Abstract
LRP1 is a large endocytic modular receptor that plays a crucial role in the scavenging of apoptotic material through binding to pattern-recognition molecules. It is a membrane anchored receptor of the LDL receptor family with 4 extracellular clusters of ligand binding modules called cysteine rich complement-type repeats that are involved in the interaction of LRP1 with its numerous ligands. Complement C1q was shown to interact with LRP1 and to be implicated in the phagocytosis of apoptotic cells. The present work aimed at exploring how these two large molecules interact at the molecular level using a dissection strategy. For that purpose, recombinant LRP1 clusters II, III and IV were produced in mammalian HEK293F cells and their binding properties were investigated. Clusters II and IV were found to interact specifically and efficiently with C1q with KDs in the nanomolar range. The use of truncated C1q fragments and recombinant mutated C1q allowed to localize more precisely the binding site for LRP1 on the collagen-like regions of C1q (CLRs), nearby the site that is implicated in the interaction with the cognate protease tetramer C1r2s2. This site could be a common anchorage for other ligands of C1q CLRs such as sulfated proteoglycans and Complement receptor type 1. The use of a cellular model, consisting in CHO LRP1-null cells transfected with full-length LRP1 or a cluster IV minireceptor (mini IV) confirmed that mini IV interacts with C1q at the cell membrane as well as full-length LRP1. Further cellular interaction studies finally highlighted that mini IV can endorse the full-length LRP1 binding efficiency for apoptotic cells and that C1q has no impact on this interaction.
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Affiliation(s)
| | - Evelyne Gout
- Université Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
| | | | - Isabelle Bally
- Université Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
| | - Camilla De Nardis
- Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, Utrecht, Netherlands
| | - Stéphane Dedieu
- Université de Reims Champagne-Ardenne, UMR CNRS 7369 MEDyC, Reims, France
| | - Anne Chouquet
- Université Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
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Geuijen CAW, De Nardis C, Maussang D, Rovers E, Gallenne T, Hendriks LJA, Visser T, Nijhuis R, Logtenberg T, de Kruif J, Gros P, Throsby M. Unbiased Combinatorial Screening Identifies a Bispecific IgG1 that Potently Inhibits HER3 Signaling via HER2-Guided Ligand Blockade. Cancer Cell 2018; 33:922-936.e10. [PMID: 29763625 DOI: 10.1016/j.ccell.2018.04.003] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 02/26/2018] [Accepted: 04/09/2018] [Indexed: 01/21/2023]
Abstract
HER2-driven cancers require phosphatidylinositide-3 kinase (PI3K)/Akt signaling through HER3 to promote tumor growth and survival. The therapeutic benefit of HER2-targeting agents, which depend on PI3K/Akt inhibition, can be overcome by hyperactivation of the heregulin (HRG)/HER3 pathway. Here we describe an unbiased phenotypic combinatorial screening approach to identify a bispecific immunoglobulin G1 (IgG1) antibody against HER2 and HER3. In tumor models resistant to HER2-targeting agents, the bispecific IgG1 potently inhibits the HRG/HER3 pathway and downstream PI3K/Akt signaling via a "dock & block" mechanism. This bispecific IgG1 is a potentially effective therapy for breast cancer and other tumors with hyperactivated HRG/HER3 signaling.
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MESH Headings
- Animals
- Antibodies, Bispecific/administration & dosage
- Antibodies, Bispecific/pharmacology
- Cell Line, Tumor
- Drug Resistance, Neoplasm/drug effects
- Drug Screening Assays, Antitumor
- Humans
- Immunoglobulin G/administration & dosage
- Immunoglobulin G/pharmacology
- MCF-7 Cells
- Mice
- Models, Molecular
- Neoplasms/drug therapy
- Neoplasms/metabolism
- Phosphatidylinositol 3-Kinases/metabolism
- Protein Binding/drug effects
- Proto-Oncogene Proteins c-akt/metabolism
- Receptor, ErbB-2/antagonists & inhibitors
- Receptor, ErbB-2/chemistry
- Receptor, ErbB-3/chemistry
- Receptor, ErbB-3/metabolism
- Signal Transduction/drug effects
- Xenograft Model Antitumor Assays
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Affiliation(s)
| | - Camilla De Nardis
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, 3584 Utrecht, the Netherlands
| | | | | | | | | | | | | | | | | | - Piet Gros
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, 3584 Utrecht, the Netherlands
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De Nardis C, Hendriks LJA, Poirier E, Arvinte T, Gros P, Bakker ABH, de Kruif J. A new approach for generating bispecific antibodies based on a common light chain format and the stable architecture of human immunoglobulin G 1. J Biol Chem 2017; 292:14706-14717. [PMID: 28655766 DOI: 10.1074/jbc.m117.793497] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [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: 04/28/2017] [Revised: 06/14/2017] [Indexed: 11/06/2022] Open
Abstract
Bispecific antibodies combine two different antigen-binding sites in a single molecule, enabling more specific targeting, novel mechanisms of action, and higher clinical efficacies. Although they have the potential to outperform conventional monoclonal antibodies, many bispecific antibodies have issues regarding production, stability, and pharmacokinetic properties. Here, we describe a new approach for generating bispecific antibodies using a common light chain format and exploiting the stable architecture of human immunoglobulin G1 We used iterative experimental validation and computational modeling to identify multiple Fc variant pairs that drive efficient heterodimerization of the antibody heavy chains. Accelerated stability studies enabled selection of one Fc variant pair dubbed "DEKK" consisting of substitutions L351D and L368E in one heavy chain combined with L351K and T366K in the other. Solving the crystal structure of the DEKK Fc region at a resolution of 2.3 Å enabled detailed analysis of the interactions inducing CH3 interface heterodimerization. Local shifts in the IgG backbone accommodate the introduction of lysine side chains that form stabilizing salt-bridge interactions with substituted and native residues in the opposite chain. Overall, the CH3 domain adapted to these shifts at the interface, yielding a stable Fc conformation very similar to that in wild-type IgG. Using the DEKK format, we generated the bispecific antibody MCLA-128, targeting human EGF receptors 2 and 3. MCLA-128 could be readily produced and purified at industrial scale with a standard mammalian cell culture platform and a routine purification protocol. Long-term accelerated stability assays confirmed that MCLA-128 is highly stable and has excellent biophysical characteristics.
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Affiliation(s)
- Camilla De Nardis
- From the Crystal and Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, 3584 CH Utrecht, The Netherlands
| | | | | | - Tudor Arvinte
- Therapeomic Inc., CH-4002 Basel, Switzerland, and.,the University of Geneva, CH-1211 Geneva, Switzerland
| | - Piet Gros
- From the Crystal and Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Department of Chemistry, Faculty of Science, Utrecht University, 3584 CH Utrecht, The Netherlands
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De Nardis C, Lössl P, van den Biggelaar M, Madoori PK, Leloup N, Mertens K, Heck AJR, Gros P. Recombinant Expression of the Full-length Ectodomain of LDL Receptor-related Protein 1 (LRP1) Unravels pH-dependent Conformational Changes and the Stoichiometry of Binding with Receptor-associated Protein (RAP). J Biol Chem 2016; 292:912-924. [PMID: 27956551 DOI: 10.1074/jbc.m116.758862] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 09/15/2016] [Revised: 12/09/2016] [Indexed: 12/11/2022] Open
Abstract
LDL receptor-related protein 1 (LRP1) is a highly modular protein and the largest known mammalian endocytic receptor. LRP1 binds and internalizes many plasma components, playing multiple crucial roles as a scavenger and signaling molecule. One major challenge to studying LRP1 has been that it is difficult to express such a large, highly glycosylated, and cysteine-rich protein, limiting structural studies to LRP1 fragments. Here, we report the first recombinant expression of the complete 61 domains of the full-length LRP1 ectodomain. This advance was achieved with a multistep cloning approach and by using DNA dilutions to improve protein yields. We investigated the binding properties of LRP1 using receptor-associated protein (RAP) as a model ligand due to its tight binding interaction. The LRP1 conformation was studied in its bound and unbound state using mass spectrometry, small-angle X-ray scattering, and negative-stain electron microscopy at neutral and acidic pH. Our findings revealed a pH-dependent release of the ligand associated with a conformational change of the receptor. In summary, this investigation of the complete LRP1 ectodomain significantly advances our understanding of this important receptor and provides the basis for further elucidating the mechanism of action of LRP1 in a whole and integrated system.
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Affiliation(s)
- Camilla De Nardis
- From the Crystal & Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht
| | - Philip Lössl
- the Biomolecular Mass Spectrometry & Proteomics Group and Netherlands Proteomics Center, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht
| | | | - Pramod K Madoori
- From the Crystal & Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht
| | - Nadia Leloup
- From the Crystal & Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht
| | - Koen Mertens
- the Department of Plasma Proteins, Sanquin Research, 1006 AN Amsterdam, and.,the Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Albert J R Heck
- the Biomolecular Mass Spectrometry & Proteomics Group and Netherlands Proteomics Center, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CH Utrecht
| | - Piet Gros
- From the Crystal & Structural Chemistry Group, Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht,
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