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Surís-Valls R, Hogervorst TP, Schoenmakers SMC, Hendrix MMRM, Milroy L, Voets IK. Inhibition of Ice Recrystallization by Nanotube-Forming Cyclic Peptides. Biomacromolecules 2022; 23:520-529. [PMID: 35045706 PMCID: PMC8848283 DOI: 10.1021/acs.biomac.1c01267] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
While most native ice-binding proteins are rigid, artificial (macro)molecular ice-binders are usually flexible. Realizing a regular array with precisely positioned ice-binding motifs on synthetic proteins, (macro)molecular ice-binders are thus challenging. Here, we exploit the predictable assembly of cyclic peptides into nanotubes as a starting point to prepare large, rigid ice-binders bearing an ice-binding site that is found in hyperactive ice-binding proteins in insects. First, we designed, synthesized, and purified cyclic octapeptide Lys2CP8 bearing a TaT motif to promote ice binding and investigated their solution assembly and activity using circular dichroism (CD) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, light scattering (LS), cryogenic transmission electron microscopy (cryo-TEM), and ice recrystallization inhibition (IRI) assays. The cyclic peptide Lys2CP8 was synthesized in good yield using Fmoc chemistry and purified by reversed-phase HPLC. Upon dissolution in aqueous solutions, Lys2CP8 was observed to assemble in a pH- and concentration-dependent manner into objects with nanoscopic dimensions. LS revealed the presence of small and large aggregates at pH 3 and 11, held together through a network of intermolecular antiparallel β-sheets as determined by FTIR and CD spectroscopy. Cryo-TEM revealed the presence of one-dimensional objects at pH 3 and 11. These are mostly well-dispersed at pH 3 but appear to bundle at pH 11. Interestingly, the pH-dependent self-assembly behavior translates into a marked pH dependence of IRI activity. Lys2CP8 is IRI-active at pH 3 while inactive at pH 11 hypothetically because the ice-binding sites are inaccessible at pH 11 due to bundling.
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Affiliation(s)
- Romà Surís-Valls
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Laboratory of Chemical Biology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Tim P Hogervorst
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Sandra M C Schoenmakers
- Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Marco M R M Hendrix
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Lech Milroy
- Laboratory of Chemical Biology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Ilja K Voets
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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2
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Reintjens NRM, Tondini E, Vis C, McGlinn T, Meeuwenoord NJ, Hogervorst TP, Overkleeft HS, Filippov DV, van der Marel GA, Ossendorp F, Codée JDC. Multivalent, Stabilized Mannose-6-Phosphates for the Targeted Delivery of Toll-Like Receptor Ligands and Peptide Antigens. Chembiochem 2021; 22:434-440. [PMID: 32864819 PMCID: PMC7894537 DOI: 10.1002/cbic.202000538] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 08/02/2020] [Revised: 08/29/2020] [Indexed: 02/03/2023]
Abstract
Mannose-6-phosphate (M6P) is recognized by the mannose-6-phosphate receptor and plays an important role in the transport of cargo to the endosomes, making it an attractive tool to improve endosomal trafficking of vaccines. We describe herein the assembly of peptide antigen conjugates carrying clusters of mannose-6-C-phosphonates (M6Po). The M6Po's are stable M6P mimics that are resistant to cleavage of the phosphate group by endogenous phosphatases. Two different strategies for the incorporation of the M6Po clusters in the conjugate have been developed: the first relies on a "post-assembly" click approach employing an M6Po bearing an alkyne functionality; the second hinges on an M6Po C-glycoside amino acid building block that can be used in solid-phase peptide synthesis. The generated conjugates were further equipped with a TLR7 ligand to stimulate dendritic cell (DC) maturation. While antigen presentation is hindered by the presence of the M6Po clusters, the incorporation of the M6Po clusters leads to increased activation of DCs, thus demonstrating their potential in improving vaccine adjuvanticity by intraendosomally active TLR ligands.
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Affiliation(s)
- Niels R. M. Reintjens
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Elena Tondini
- Department of ImmunologyLeiden University Medical CenterLeiden UniversityAlbinusdreef 22333 ZALeidenNetherlands
| | - Christopher Vis
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Toroa McGlinn
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Nico J. Meeuwenoord
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Tim P. Hogervorst
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Herman S. Overkleeft
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | - Dmitri V. Filippov
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
| | | | - Ferry Ossendorp
- Department of ImmunologyLeiden University Medical CenterLeiden UniversityAlbinusdreef 22333 ZALeidenNetherlands
| | - Jeroen D. C. Codée
- Leiden Institute of ChemistryLeiden UniversityEinsteinweg 552333 CCLeidenNetherlands
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3
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Li RJE, Hogervorst TP, Achilli S, Bruijns SCM, Spiekstra S, Vivès C, Thépaut M, Filippov DV, van der Marel GA, van Vliet SJ, Fieschi F, Codée JDC, van Kooyk Y. Targeting of the C-Type Lectin Receptor Langerin Using Bifunctional Mannosylated Antigens. Front Cell Dev Biol 2020; 8:556. [PMID: 32760719 PMCID: PMC7371993 DOI: 10.3389/fcell.2020.00556] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 01/09/2020] [Accepted: 06/11/2020] [Indexed: 12/24/2022] Open
Abstract
Langerhans cells (LCs) are antigen-presenting cells that reside in the skin. They uniquely express high levels of the C-type lectin receptor Langerin (CD207), which is an attractive target for antigen delivery in immunotherapeutic vaccination strategies against cancer. We here assess a library of 20 synthetic, well-defined mannoside clusters, built up from one, two, and three of six monomannosides, dimannosides, or trimannosides, appended to an oligopeptide backbone, for binding with Langerin using surface plasmon resonance and flow cytometric quantification. It is found that Langerin binding affinity increases with increasing number of mannosides. Hexavalent presentation of the mannosides resulted in binding affinities ranging from 3 to 12 μM. Trivalent presentation of the dimannosides and trimannosides led to Langerin affinity in the same range. The model melanoma gp100 antigenic peptide was subsequently equipped with a hexavalent cluster of the dimannosides and trimannosides as targeting moieties. Surprisingly, although the bifunctional conjugates were taken up in LCs in a Langerin-dependent manner, limited antigen presentation to cytotoxic T cells was observed. These results indicate that targeting glycan moieties on immunotherapeutic vaccines should not only be validated for target binding, but also on the continued effects on biology, such as antigen presentation to both CD8+ and CD4+ T cells.
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Affiliation(s)
- Rui-Jun Eveline Li
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tim P Hogervorst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Silvia Achilli
- Univ. Grenoble Alpes, CEA, CRNS, Institut de Biologie Structurale, Grenoble, France
| | - Sven C M Bruijns
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Sander Spiekstra
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Corinne Vivès
- Univ. Grenoble Alpes, CEA, CRNS, Institut de Biologie Structurale, Grenoble, France
| | - Michel Thépaut
- Univ. Grenoble Alpes, CEA, CRNS, Institut de Biologie Structurale, Grenoble, France
| | - Dmitri V Filippov
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Gijs A van der Marel
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Sandra J van Vliet
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Franck Fieschi
- Univ. Grenoble Alpes, CEA, CRNS, Institut de Biologie Structurale, Grenoble, France
| | - Jeroen D C Codée
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam University Medical Centers, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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Hogervorst TP, Li RJE, Marino L, Bruijns SCM, Meeuwenoord NJ, Filippov DV, Overkleeft HS, van der Marel GA, van Vliet SJ, van Kooyk Y, Codée JDC. C-Mannosyl Lysine for Solid Phase Assembly of Mannosylated Peptide Conjugate Cancer Vaccines. ACS Chem Biol 2020; 15:728-739. [PMID: 32045202 PMCID: PMC7091534 DOI: 10.1021/acschembio.9b00987] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
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Dendritic
cells (DCs) are armed with a multitude of Pattern Recognition
Receptors (PRRs) to recognize pathogens and initiate pathogen-tailored
T cell responses. In these responses, the maturation of DCs is key,
as well as the production of cytokines that help to accomplish T cell
responses. DC-SIGN is a frequently exploited PRR that can effectively
be targeted with mannosylated antigens to enhance the induction of
antigen-specific T cells. The natural O-mannosidic
linkage is susceptible to enzymatic degradation, and its chemical
sensitivity complicates the synthesis of mannosylated antigens. For
this reason, (oligo)mannosides are generally introduced in a late
stage of the antigen synthesis, requiring orthogonal conjugation handles
for their attachment. To increase the stability of the mannosides
and streamline the synthesis of mannosylated peptide antigens, we
here describe the development of an acid-stable C-mannosyl lysine, which allows for the inline introduction of mannosides
during solid-phase peptide synthesis (SPPS). The developed amino acid
has been successfully used for the assembly of both small ligands
and peptide antigen conjugates comprising an epitope of the gp100
melanoma-associated antigen and a TLR7 agonist for DC activation.
The ligands showed similar internalization capacities and binding
affinities as the O-mannosyl analogs. Moreover, the
antigen conjugates were capable of inducing maturation, stimulating
the secretion of pro-inflammatory cytokines, and providing enhanced
gp100 presentation to CD8+ and CD4+ T cells,
similar to their O-mannosyl counterparts. Our results
demonstrate that the C-mannose lysine is a valuable
building block for the generation of anticancer peptide-conjugate
vaccine modalities.
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Affiliation(s)
- Tim P. Hogervorst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - R. J. Eveline Li
- Amsterdam UMC-Location Vrije Universiteit Amsterdam, Deptartment of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Laura Marino
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Sven C. M. Bruijns
- Amsterdam UMC-Location Vrije Universiteit Amsterdam, Deptartment of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Nico J. Meeuwenoord
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Dmitri V. Filippov
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Herman S. Overkleeft
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Gijsbert A. van der Marel
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
| | - Sandra J. van Vliet
- Amsterdam UMC-Location Vrije Universiteit Amsterdam, Deptartment of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Yvette van Kooyk
- Amsterdam UMC-Location Vrije Universiteit Amsterdam, Deptartment of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam, Netherlands
| | - Jeroen D. C. Codée
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, The Netherlands
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5
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Li RJE, Hogervorst TP, Achilli S, Bruijns SC, Arnoldus T, Vivès C, Wong CC, Thépaut M, Meeuwenoord NJ, van den Elst H, Overkleeft HS, van der Marel GA, Filippov DV, van Vliet SJ, Fieschi F, Codée JDC, van Kooyk Y. Systematic Dual Targeting of Dendritic Cell C-Type Lectin Receptor DC-SIGN and TLR7 Using a Trifunctional Mannosylated Antigen. Front Chem 2019; 7:650. [PMID: 31637232 PMCID: PMC6787163 DOI: 10.3389/fchem.2019.00650] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 06/19/2019] [Accepted: 09/11/2019] [Indexed: 01/22/2023] Open
Abstract
Dendritic cells (DCs) are important initiators of adaptive immunity, and they possess a multitude of Pattern Recognition Receptors (PRR) to generate an adequate T cell mediated immunity against invading pathogens. PRR ligands are frequently conjugated to tumor-associated antigens in a vaccination strategy to enhance the immune response toward such antigens. One of these PPRs, DC-SIGN, a member of the C-type lectin receptor (CLR) family, has been extensively targeted with Lewis structures and mannose glycans, often presented in multivalent fashion. We synthesized a library of well-defined mannosides (mono-, di-, and tri-mannosides), based on known "high mannose" structures, that we presented in a systematically increasing number of copies (n = 1, 2, 3, or 6), allowing us to simultaneously study the effect of mannoside configuration and multivalency on DC-SIGN binding via Surface Plasmon Resonance (SPR) and flow cytometry. Hexavalent presentation of the clusters showed the highest binding affinity, with the hexa-α1,2-di-mannoside being the most potent ligand. The four highest binding hexavalent mannoside structures were conjugated to a model melanoma gp100-peptide antigen and further equipped with a Toll-like receptor 7 (TLR7)-agonist as adjuvant for DC maturation, creating a trifunctional vaccine conjugate. Interestingly, DC-SIGN affinity of the mannoside clusters did not directly correlate with antigen presentation enhancing properties and the α1,2-di-mannoside cluster with the highest binding affinity in our library even hampered T cell activation. Overall, this systematic study has demonstrated that multivalent glycan presentation can improve DC-SIGN binding but enhanced binding cannot be directly translated into enhanced antigen presentation and the sole assessment of binding affinity is thus insufficient to determine further functional biological activity. Furthermore, we show that well-defined antigen conjugates combining two different PRR ligands can be generated in a modular fashion to increase the effectiveness of vaccine constructs.
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Affiliation(s)
- Rui-Jun Eveline Li
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tim P. Hogervorst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Silvia Achilli
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Sven C. Bruijns
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Tim Arnoldus
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Corinne Vivès
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Chung C. Wong
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Michel Thépaut
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Nico J. Meeuwenoord
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Hans van den Elst
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Herman S. Overkleeft
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Gijs A. van der Marel
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Dmitri V. Filippov
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Sandra J. van Vliet
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Franck Fieschi
- Univ. Grenoble Alpes, CNRS, CEA, Institut de Biologie Structurale, Grenoble, France
| | - Jeroen D. C. Codée
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, Netherlands
| | - Yvette van Kooyk
- Department of Molecular Cell Biology and Immunology, Cancer Center Amsterdam, Amsterdam Infection and Immunity Institute, Amsterdam Universitair Medische Centra, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
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Hendrikse SIS, Su L, Hogervorst TP, Lafleur RPM, Lou X, van der Marel GA, Codee JDC, Meijer EW. Elucidating the Ordering in Self-Assembled Glycocalyx Mimicking Supramolecular Copolymers in Water. J Am Chem Soc 2019; 141:13877-13886. [PMID: 31387351 PMCID: PMC6733156 DOI: 10.1021/jacs.9b06607] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
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Polysaccharides present
in the glycocalyx and extracellular matrix
are highly important for a multitude of functions. Oligo- and polysaccharides-based
biomaterials are being developed to mimic the glycocalyx, but the
spatial functionalization of these polysaccharides represents a major
challenge. In this paper, a series of benzene-1,3,5-tricarboxamide
(BTA) based supramolecular monomers is designed and synthesized with
mono- (BTA-β-d-glucose; BTA-Glc and BTA-α-d-mannose; BTA-Man) or disaccharides (BTA-β-d-cellobiose; BTA-Cel) at their periphery or a monosaccharide (BTA-OEG4-α-d-mannose; BTA-OEG4-Man) at the
end of a tetraethylene glycol linker. These glycosylated BTAs have
been used to generate supramolecular assemblies and it is shown that
the nature of the carbohydrate appendage is crucial for the supramolecular
(co)polymerization behavior. BTA-Glc and BTA-Man are shown to assemble
into micrometers long 1D (bundled) fibers with opposite helicities,
whereas BTA-Cel and BTA-OEG4-Man formed small spherical
micelles. The latter two monomers are used in a copolymerization approach
with BTA-Glc, BTA-Man, or ethylene glycol BTA (BTA-OEG4) to give 1D fibers with BTA-Cel or BTA-OEG4-Man incorporated.
Consequently, the carbohydrate appendage influences both the assembly
behavior and the internal order. Using this approach it is possible
to create 1D-fibers with adjustable saccharide densities exhibiting
tailored dynamic exchange profiles. Furthermore, hydrogels with tunable
mechanical properties can be achieved, opening up possibilities for
the development of multicomponent functional biomaterials.
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Affiliation(s)
- Simone I S Hendrikse
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - Lu Su
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - Tim P Hogervorst
- Department of Bio-organic Synthesis, Leiden Institute of Chemistry , Leiden University , 2300 RA Leiden , The Netherlands
| | - René P M Lafleur
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - Xianwen Lou
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
| | - Gijsbert A van der Marel
- Department of Bio-organic Synthesis, Leiden Institute of Chemistry , Leiden University , 2300 RA Leiden , The Netherlands
| | - Jeroen D C Codee
- Department of Bio-organic Synthesis, Leiden Institute of Chemistry , Leiden University , 2300 RA Leiden , The Netherlands
| | - E W Meijer
- Institute for Complex Molecular Systems , Eindhoven University of Technology , P.O. Box 513, 5600 MB Eindhoven , The Netherlands
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7
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Gential GPP, Hogervorst TP, Tondini E, van de Graaff MJ, Overkleeft HS, Codée JDC, van der Marel GA, Ossendorp F, Filippov DV. Peptides conjugated to 2-alkoxy-8-oxo-adenine as potential synthetic vaccines triggering TLR7. Bioorg Med Chem Lett 2019; 29:1340-1344. [PMID: 30952595 DOI: 10.1016/j.bmcl.2019.03.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 03/26/2019] [Accepted: 03/29/2019] [Indexed: 02/07/2023]
Abstract
Covalent linking of immunogenic oligopeptides with synthetic Toll-like receptor ligands is a useful approach to develop self-adjuvanting vaccines. In particular, small-molecule based agonists of Toll-like receptor 7 (TLR7) that are derived from 8-oxo-adenine core are potentially promising because these chemically robust TLR7 ligands can be connected to peptide T-cell epitopes via straightforward solid-phase peptide synthesis. In this contribution we present the synthesis of a Boc-protected 9-benzyl-2-alkoxy-8-oxo-adenine building block and its application in the online solid phase synthesis of three peptide conjugates that differ in the position of the TLR7 ligand within the peptide. The conjugates are able to induce dendritic cell maturation and T cell proliferation while the position of the ligand impacts T cell proliferation potency.
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Affiliation(s)
- Geoffroy P P Gential
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Tim P Hogervorst
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Elena Tondini
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Michel J van de Graaff
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Herman S Overkleeft
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Jeroen D C Codée
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Gijsbert A van der Marel
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands
| | - Ferry Ossendorp
- Department of Immunohematology and Blood Transfusion, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
| | - Dmitri V Filippov
- Leiden Institute of Chemistry and The Institute for Chemical Immunology, Leiden University, Einsteinweg 55, 2333 CC Leiden, The Netherlands.
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