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van Strien J, Makurat M, Zeng Y, Olsthoorn R, Schneider GF, Slütter B, MacKay JA, Jiskoot W, Kros A. Noncovalent Conjugation of OVA323 to ELP Micelles Increases Immune Response. Biomacromolecules 2024; 25:1027-1037. [PMID: 38166400 PMCID: PMC10865353 DOI: 10.1021/acs.biomac.3c01091] [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: 10/11/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/04/2024]
Abstract
Subunit vaccines would benefit from a safe particle-based adjuvant. Elastin-like polypeptide (ELP)-based micelles are interesting candidate adjuvants due to their well-defined size and easy modification with protein-based cargo. Coiled coils can facilitate noncovalent modifications, while potentially enhancing antigen delivery through interaction with cell membranes. ELP micelles comprise ELP diblock copolymers that self-assemble above a critical micelle temperature. In this study, an amphiphilic ELP was conjugated to peptide "K", which forms a heterodimeric coiled-coil complex with peptide "E". Self-assembled "covalent" micelles containing ELP-OVA323 (i.e., model antigen OVA323 conjugated to ELP), "coiled-coil" micelles containing ELP-K/E-OVA323 and "hybrid" micelles containing ELP-K and ELP-OVA323 were shown to be monodisperse and spherical. Dendritic cells (DCs) were exposed to all micelle compositions, and T-cell proliferation was investigated. The presence of ELP-K enhanced micelle uptake and subsequent DC maturation, resulting in enhanced CD4+ T-cell proliferation, which makes ELPs with coiled coil-associated antigens a promising vaccine platform.
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Affiliation(s)
- Jolinde van Strien
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Max Makurat
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Ye Zeng
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - René Olsthoorn
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Gregory F. Schneider
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Bram Slütter
- Department
of BioTherapeutics, LACDR, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - J. Andrew MacKay
- Department
of Pharmacology and Pharmaceutical Sciences, Alfred E. Mann School
of Pharmacy and Pharmaceutical Sciences, University of Southern California, 1985 Zonal Avenue, Los Angeles, California 90089-9121, United States
| | - Wim Jiskoot
- Department
of BioTherapeutics, LACDR, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
| | - Alexander Kros
- Department
of Supramolecular and Biomaterials Chemistry, Leiden Institute of
Chemistry, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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van Strien J, Warmenhoven H, Logiantara A, Makurat M, Aglas L, Bethanis A, Leboux R, van Rijt L, MacKay JA, van Schijndel JW, Schneider G, Olsthoorn R, Jiskoot W, van Ree R, Kros A. Bet v 1-displaying elastin-like polypeptide nanoparticles induce a strong humoral and weak CD4+ T-cell response against Bet v 1 in a murine immunogenicity model. Front Immunol 2022; 13:1006776. [PMID: 36275650 PMCID: PMC9583423 DOI: 10.3389/fimmu.2022.1006776] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/07/2022] [Indexed: 11/13/2022] Open
Abstract
There is growing concern about the toxicity of colloidal aluminum salts used as adjuvants in subcutaneous allergen immunotherapy (SCIT). Therefore, alternative adjuvants and delivery systems are being explored to replace alum in SCIT. We applied micellar elastin-like polypeptides (ELPs), a type of self-assembling protein, to replace alum as vaccine adjuvant in birch pollen SCIT. ELP and an ELP-Bet v 1 fusion protein were expressed in E. coli and purified by immuno-affinity chromatography and inverse-transition cycling (ITC). Nanoparticles self-assembled from ELP and a 9:1 ELP/ELP-Bet v 1 mixture were characterized by using dynamic light scattering and atomic force microscopy. Allergenicity was assessed by measuring mediator release from rat basophilic leukemia cells transformed with the human FcϵR1 and sensitized with sera derived from human birch pollen allergic patients. Humoral and T-cell immunity were investigated by immunizing naïve mice with the ELP/ELP-Bet v 1 nanoparticles or alum-adsorbed Bet v 1, both containing 36 µg Bet v 1. ELP and ELP/ELP-Bet v 1 self-assembled at 37°C into spherically shaped micelles with a diameter of ~45 nm. ELP conjugation made Bet v 1 hypo-allergenic (10-fold). Compared to alum-adsorbed Bet v 1, ELP/ELP-Bet v 1 nanoparticles induced stronger IgG responses with an earlier onset. Additionally, ELP/ELP-Bet v 1 did not induce Th2 skewing cytokines and IgE. The hypoallergenic character and strong humoral immune response in the absence of a Th2-skewing T-cell response make ELP-based nanoparticles a promising candidate to replace alum in SCIT.
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Affiliation(s)
- Jolinde van Strien
- Department of Supramolecular and Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Hans Warmenhoven
- Department of Experimental Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands.,R&D Department, Haarlems Allergenen Laboratorium (HAL) Allergy B.V., Leiden, Netherlands
| | - Adrian Logiantara
- Department of Experimental Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Max Makurat
- Department of Supramolecular and Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Lorenz Aglas
- Division of Allergy and Immunology, Department of Biosciences, Paris Lodron University of Salzburg, Salzburg, Austria
| | - Athanasios Bethanis
- Division of Allergy and Immunology, Department of Biosciences, Paris Lodron University of Salzburg, Salzburg, Austria
| | - Romain Leboux
- Department of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, Leiden, Netherlands
| | - Leonie van Rijt
- Department of Experimental Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, School of Pharmacy, University of Southern California, Los Angeles, CA, United States
| | | | - Gregory Schneider
- Department of Supramolecular and Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - René Olsthoorn
- Department of Supramolecular and Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Wim Jiskoot
- Department of BioTherapeutics, Leiden Academic Centre for Drug Research (LACDR), Leiden University, Leiden, Netherlands
| | - Ronald van Ree
- Department of Experimental Immunology, Amsterdam University Medical Centers, Amsterdam, Netherlands.,Department of Otorhinolaryngology, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Alexander Kros
- Department of Supramolecular and Biomaterials Chemistry, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
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