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Mihaylova NM, Manoylov IK, Nikolova MH, Prechl J, Tchorbanov AI. DNA and protein-generated chimeric molecules for delivery of influenza viral epitopes in mouse and humanized NSG transfer models. Hum Vaccin Immunother 2024; 20:2292381. [PMID: 38193304 DOI: 10.1080/21645515.2023.2292381] [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: 10/14/2023] [Accepted: 12/05/2023] [Indexed: 01/10/2024] Open
Abstract
Purified subunit viral antigens are weakly immunogenic and stimulate only the antibody but not the T cell-mediated immune response. An alternative approach to inducing protective immunity with small viral peptides may be the targeting of viral epitopes to immunocompetent cells by DNA and protein-engineered vaccines. This review will focus on DNA and protein-generated chimeric molecules carrying engineered fragments specific for activating cell surface co-receptors for inducing protective antiviral immunity. Adjuvanted protein-based vaccine or DNA constructs encoding simultaneously T- and B-cell peptide epitopes from influenza viral hemagglutinin, and scFvs specific for costimulatory immune cell receptors may induce a significant increase of anti-influenza antibody levels and strong CTL activity against virus-infected cells in a manner that mimics the natural infection. Here we summarize the development of several DNA and protein chimeric constructs carrying influenza virus HA317-41 fragment. The generated engineered molecules were used for immunization in intact murine and experimentally humanized NSG mouse models.
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Affiliation(s)
- Nikolina M Mihaylova
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Iliyan K Manoylov
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Maria H Nikolova
- National Reference Laboratory of Immunology, National Center of Infectious and Parasitic Diseases, Sofia, Bulgaria
| | | | - Andrey I Tchorbanov
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
- National Institute of Immunology, Sofia, Bulgaria
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Marchev AS, Manoylov IK, Boneva GV, Bradyanova SL, Koycheva IK, Tchorbanov AI, Georgiev MI. Inhibition of glioblastoma growth by Rhodiola rosea L. and its active constituents: An in vitro and in vivo study. Maced Pharm Bull 2022. [DOI: 10.33320/maced.pharm.bull.2022.68.04.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Affiliation(s)
- Andrey S. Marchev
- Laboratory of Metabolomics, Department of Biotechnology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 139 Ruski Blvd, 4000 Plovdiv, Bulgaria
| | - Iliyan K. Manoylov
- Laboratory of Experimental Immunology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26 Georgi Bonchev Str., 1113 Sofia, Bulgaria
| | - Gabriela V. Boneva
- Laboratory of Experimental Immunology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26 Georgi Bonchev Str., 1113 Sofia, Bulgaria
| | - Silviya L. Bradyanova
- Laboratory of Experimental Immunology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26 Georgi Bonchev Str., 1113 Sofia, Bulgaria
| | - Ivanka K. Koycheva
- Laboratory of Metabolomics, Department of Biotechnology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 139 Ruski Blvd, 4000 Plovdiv, Bulgaria
| | - Andrey I. Tchorbanov
- Laboratory of Experimental Immunology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 26 Georgi Bonchev Str., 1113 Sofia, Bulgaria
| | - Milen I. Georgiev
- Laboratory of Metabolomics, Department of Biotechnology, The Stephan Angeloff Institute of Microbiology, Bulgarian Academy of Sciences, 139 Ruski Blvd, 4000 Plovdiv, Bulgaria
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Ivanova II, Mihaylova NM, Manoylov IK, Makatsori D, Lolov S, Nikolova MH, Mamalaki A, Prechl J, Tchorbanov AI. Targeting of Influenza Viral Epitopes to Antigen-Presenting Cells by Genetically Engineered Chimeric Molecules in a Humanized NOD SCID Gamma Transfer Model. Hum Gene Ther 2019; 29:1056-1070. [PMID: 30191743 DOI: 10.1089/hum.2018.100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Antiviral DNA vaccines are a novel strategy in the vaccine development field, which basically consists of the administration of expression vectors coding viral antigen sequences into the host's cells. Targeting of conserved viral epitopes by antibody fragments specific to activating cell surface co-receptor molecules on antigen-presenting cells could be an alternative approach for inducing protective immunity. It has been shown that FcγRI on human monocytes enhances antigen presentation in vivo. Various DNA constructs, encoding a Single-chain variable antibodies (scFv) from mouse anti-human FcγRI monoclonal antibody, coupled to a sequence encoding a T- and B-cell epitope-containing influenza A virus hemagglutinin inter-subunit peptide were inserted into the eukaryotic expression vector system pTriEx-3 Neo. The constructed chimeric DNA molecules were expressed by transfected Chinese hamster ovary cells and the ability of the engineered proteins to interact with FcγRI-expressing cells was confirmed by flow cytometry. The fusion protein induced a strong signal transduction on human monocytes via FcγRI. The expression vector pTriEx-3 Neo containing the described construct was used as a naked DNA vaccine and introduced directly to experimental humanized NOD SCID gamma mice with or without boosting with the expressed fusion protein. Immunization with the generated DNA chimeric molecules and prime-boost with the expressed recombinant proteins induced significant serum levels of anti-influenza immunoglobulin G antibodies and strong cytotoxic T lymphocyte activity against influenza virus-infected cells in humanized animals.
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Affiliation(s)
- Iva I Ivanova
- 1 Laboratory of Experimental Immunology, Institute of Microbiology , Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Nikolina M Mihaylova
- 1 Laboratory of Experimental Immunology, Institute of Microbiology , Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Iliyan K Manoylov
- 1 Laboratory of Experimental Immunology, Institute of Microbiology , Bulgarian Academy of Sciences, Sofia, Bulgaria
| | | | - Stefan Lolov
- 3 Institute of Biology and Immunology of Reproduction, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Maria H Nikolova
- 4 National Reference Laboratory of Immunology, National Center of Infectious and Parasitic Diseases , Sofia, Bulgaria
| | - Avgi Mamalaki
- 2 Hellenic Pasteur Institute , Ampelokipi, Athens, Greece
| | - Jozsef Prechl
- 5 Immunology Research Group, Hungarian Academy of Sciences , Budapest, Hungary
| | - Andrey I Tchorbanov
- 1 Laboratory of Experimental Immunology, Institute of Microbiology , Bulgarian Academy of Sciences, Sofia, Bulgaria .,6 National Institute of Immunology , Sofia, Bulgaria
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Manoylov IK, Boneva GV, Doytchinova IA, Mihaylova NM, Tchorbanov AI. Protein-engineered molecules carrying GAD65 epitopes and targeting CD35 selectively down-modulate disease-associated human B lymphocytes. Clin Exp Immunol 2019; 197:329-340. [PMID: 31009057 DOI: 10.1111/cei.13305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/16/2019] [Indexed: 12/29/2022] Open
Abstract
Type 1 diabetes mellitus is an autoimmune metabolic disorder characterized by chronic hyperglycemia, the presence of autoreactive T and B cells and autoantibodies against self-antigens. A membrane-bound enzyme on the pancreatic beta-cells, glutamic acid decarboxylase 65 (GAD65), is one of the main autoantigens in type 1 diabetes. Autoantibodies against GAD65 are potentially involved in beta-cell destruction and decline of pancreatic functions. The human complement receptor type 1 (CD35) on B and T lymphocytes has a suppressive activity on these cells. We hypothesized that it may be possible to eliminate GAD65-specific B cells from type 1 diabetes patients by using chimeric molecules, containing an anti-CD35 antibody, coupled to peptides resembling GAD65 B/T epitopes. These molecules are expected to selectively bind the anti-GAD65 specific B cells by the co-cross-linking of the immunoglobulin receptor and CD35 and to deliver a suppressive signal. Two synthetic peptides derived from GAD65 protein (GAD65 epitopes) and anti-CD35 monoclonal antibody were used for the construction of two chimeras. The immunomodulatory activity of the engineered antibodies was tested in vitro using peripheral blood mononuclear cells (PBMCs) from type 1 diabetes patients. A reduction in the number of anti-GAD65 IgG antibody-secreting plasma cells and increased percentage of apoptotic B lymphocytes was observed after treatment of these PBMCs with the engineered antibodies. The constructed chimeric molecules are able to selectively modulate the activity of GAD65-specific B lymphocytes and the production of anti-GAD65 IgG autoantibodies by co-cross-linking of the inhibitory CD35 and the B cell antigen receptor (BCR). This treatment presents a possible way to alter the autoimmune nature of these cells.
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Affiliation(s)
- I K Manoylov
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - G V Boneva
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - I A Doytchinova
- Faculty of Pharmacy, Medical University of Sofia, Sofia, Bulgaria
| | - N M Mihaylova
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - A I Tchorbanov
- Laboratory of Experimental Immunology, Institute of Microbiology, Bulgarian Academy of Sciences, Sofia, Bulgaria.,National Institute of Immunology, Sofia, Bulgaria
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