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Theobald SJ, Fiestas E, Schneider A, Ostermann B, Danisch S, von Kaisenberg C, Rybniker J, Hammerschmidt W, Zeidler R, Stripecke R. Fully Human Herpesvirus-Specific Neutralizing IgG Antibodies Generated by EBV Immortalization of Splenocytes-Derived from Immunized Humanized Mice. Cells 2023; 13:20. [PMID: 38201224 PMCID: PMC10778511 DOI: 10.3390/cells13010020] [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: 10/27/2023] [Revised: 12/08/2023] [Accepted: 12/11/2023] [Indexed: 01/12/2024] Open
Abstract
Antiviral neutralizing antibodies (nAbs) are commonly derived from B cells developed in immunized or infected animals and humans. Fully human antibodies are preferred for clinical use as they are potentially less immunogenic. However, the function of B cells varies depending on their homing pattern and an additional hurdle for antibody discovery in humans is the source of human tissues with an immunological microenvironment. Here, we show an efficient method to pharm human antibodies using immortalized B cells recovered from Nod.Rag.Gamma (NRG) mice reconstituting the human immune system (HIS). Humanized HIS mice were immunized either with autologous engineered dendritic cells expressing the human cytomegalovirus gB envelope protein (HCMV-gB) or with Epstein-Barr virus-like particles (EB-VLP). Human B cells recovered from spleen of HIS mice were efficiently immortalized with EBV in vitro. We show that these immortalized B cells secreted human IgGs with neutralization capacities against prototypic HCMV-gB and EBV-gp350. Taken together, we show that HIS mice can be successfully used for the generation and pharming fully human IgGs. This technology can be further explored to generate antibodies against emerging infections for diagnostic or therapeutic purposes.
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Affiliation(s)
- Sebastian J. Theobald
- Department I of Internal Medicine, University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany; (J.R.); (R.S.)
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 50931 Cologne, Germany
- Clinic of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (S.D.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 30559 Hannover, Germany
| | - Elena Fiestas
- Research Unit Gene Vectors, Helmholtz Center Munich, German Research Center for Environmental Health, 81377 Munich, Germany (W.H.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81377 Munich, Germany;
- Institute of Structural Biology, Helmholtz Center Munich, German Research Center for Environmental Health, 81377 Munich, Germany
| | - Andreas Schneider
- Clinic of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (S.D.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 30559 Hannover, Germany
| | - Benjamin Ostermann
- Clinic of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (S.D.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 30559 Hannover, Germany
| | - Simon Danisch
- Clinic of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (S.D.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 30559 Hannover, Germany
| | - Constantin von Kaisenberg
- Department of Obstetrics, Gynecology and Reproductive Medicine, Hannover Medical School, 30625 Hannover, Germany;
| | - Jan Rybniker
- Department I of Internal Medicine, University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany; (J.R.); (R.S.)
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 50931 Cologne, Germany
| | - Wolfgang Hammerschmidt
- Research Unit Gene Vectors, Helmholtz Center Munich, German Research Center for Environmental Health, 81377 Munich, Germany (W.H.)
- German Center for Infection Research (DZIF), Partner Site Munich, 81377 Munich, Germany;
| | - Reinhard Zeidler
- German Center for Infection Research (DZIF), Partner Site Munich, 81377 Munich, Germany;
- Institute of Structural Biology, Helmholtz Center Munich, German Research Center for Environmental Health, 81377 Munich, Germany
- Department of Otorhinolaryngology, Munich University Hospital, 81377 Munich, Germany
| | - Renata Stripecke
- Department I of Internal Medicine, University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany; (J.R.); (R.S.)
- Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 50931 Cologne, Germany
- Clinic of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, 30625 Hannover, Germany; (A.S.); (S.D.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 30559 Hannover, Germany
- Institute of Translational Immuno-Oncology, University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany
- Cancer Research Center Cologne Essen, University Hospital Cologne, Faculty of Medicine, University of Cologne, 50937 Cologne, Germany
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Gärtner K, Battke C, Dünzkofer J, Hüls C, von Neubeck B, Kellner MK, Fiestas E, Fackler S, Lang S, Zeidler R. Tumor-derived extracellular vesicles activate primary monocytes. Cancer Med 2018; 7:2013-2020. [PMID: 29601673 PMCID: PMC5943417 DOI: 10.1002/cam4.1465] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [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: 01/09/2018] [Revised: 02/21/2018] [Accepted: 03/01/2018] [Indexed: 12/14/2022] Open
Abstract
Tumor cells educate immune effector cells in their vicinity by releasing factors that manipulate their phenotype and function. In fact, the thus generated immunosuppressive tumor microenvironment constitutes an integral part and a hallmark of solid tumors and contributes significantly to tumor development and immune escape. It has long been thought that soluble factors like prostaglandin E2 and TGF-β are the main mediators of these effects. But tumor cells also constantly release large number of extracellular vesicles (EVs), which are important conveyors of immune responses. We show here that tumor-derived EVs interact with primary monocytes and induce an activated phenotype, which is also observed in tumor-associated macrophages. Thus, both tumor-derived EVs and soluble factors together collaborate to form the immunosuppressive milieu of the tumor environment.
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Affiliation(s)
- Kathrin Gärtner
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany
| | - Christina Battke
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany
| | - Judith Dünzkofer
- Department of Otorhinolaryngology, Klinikum der Universität (KUM), Munich, Germany
| | - Corinna Hüls
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany.,Department of Otorhinolaryngology, Klinikum der Universität (KUM), Munich, Germany
| | - Bettina von Neubeck
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany
| | - Mar-Kus Kellner
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany
| | - Elena Fiestas
- Department of Otorhinolaryngology, Klinikum der Universität (KUM), Munich, Germany
| | - Susanne Fackler
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany
| | - Stephan Lang
- Department of Otorhinolaryngology, University of Duisburg-Essen, Essen, Germany
| | - Reinhard Zeidler
- Research Unit Gene Vectors, Helmholtz Center Munich German Research Center for Environmental Health, Munich, Germany.,Department of Otorhinolaryngology, Klinikum der Universität (KUM), Munich, Germany
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