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Kandler R, Benaragama Y, Bera M, Wang C, Samiha RA, Sameera WMC, Das S, Nag A. Development of Novel Immobilized Copper-Ligand Complex for Click Chemistry of Biomolecules. Molecules 2024; 29:2148. [PMID: 38731638 PMCID: PMC11085236 DOI: 10.3390/molecules29092148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 04/22/2024] [Accepted: 04/30/2024] [Indexed: 05/13/2024] Open
Abstract
Copper-catalyzed azide-alkyne cycloaddition click (CuAAC) reaction is widely used to synthesize drug candidates and other biomolecule classes. Homogeneous catalysts, which consist of copper coordinated to a ligand framework, have been optimized for high yield and specificity of the CuAAC reaction, but CuAAC reaction with these catalysts requires the addition of a reducing agent and basic conditions, which can complicate some of the desired syntheses. Additionally, removing copper from the synthesized CuAAC-containing biomolecule is necessary for biological applications but inconvenient and requires additional purification steps. We describe here the design and synthesis of a PNN-type pincer ligand complex with copper (I) that stabilizes the copper (I) and, therefore, can act as a CuAAC catalyst without a reducing agent and base under physiologically relevant conditions. This complex was immobilized on two types of resin, and one of the immobilized catalyst forms worked well under aqueous physiological conditions. Minimal copper leaching was observed from the immobilized catalyst, which allowed its use in multiple reaction cycles without the addition of any reducing agent or base and without recharging with copper ion. The mechanism of the catalytic cycle was rationalized by density functional theory (DFT). This catalyst's utility was demonstrated by synthesizing coumarin derivatives of small molecules such as ferrocene and sugar.
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Affiliation(s)
- Rene Kandler
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
| | - Yomal Benaragama
- Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka; (Y.B.); (W.M.C.S.)
| | - Manoranjan Bera
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
| | - Caroline Wang
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
| | - Rasheda Aktar Samiha
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
| | - W. M. C. Sameera
- Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka; (Y.B.); (W.M.C.S.)
| | - Samir Das
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
| | - Arundhati Nag
- Carlson School of Chemistry and Biochemistry, Clark University, Worcester, MA 01610, USA; (R.K.); (M.B.); (C.W.); (R.A.S.)
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2
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Erickson PW, Fulcher JM, Spaltenstein P, Kay MS. Traceless Click-Assisted Native Chemical Ligation Enabled by Protecting Dibenzocyclooctyne from Acid-Mediated Rearrangement with Copper(I). Bioconjug Chem 2021; 32:2233-2244. [PMID: 34619957 DOI: 10.1021/acs.bioconjchem.1c00403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The scope of proteins accessible to total chemical synthesis via native chemical ligation (NCL) is often limited by slow ligation kinetics. Here we describe Click-Assisted NCL (CAN), in which peptides are incorporated with traceless "helping hand" lysine linkers that enable addition of dibenzocyclooctyne (DBCO) and azide handles. The resulting strain-promoted alkyne-azide cycloaddition (SPAAC) increases their effective concentration to greatly accelerate ligations. We demonstrate that copper(I) protects DBCO from acid-mediated rearrangement during acidic peptide cleavage, enabling direct production of DBCO synthetic peptides. Excitingly, triazole-linked model peptides ligated rapidly and accumulated little side product due to the fast reaction time. Using the E. coli ribosomal subunit L32 as a model protein, we further demonstrate that SPAAC, ligation, desulfurization, and linker cleavage steps can be performed in one pot. CAN is a useful method for overcoming challenging ligations involving sterically hindered junctions. Additionally, CAN is anticipated to be an important stepping stone toward a multisegment, one-pot, templated ligation system.
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Affiliation(s)
- Patrick W Erickson
- Department of Biochemistry, University of Utah School of Medicine, 15 North Medical Drive East, Room 4100, Salt Lake City, Utah 84112, United States.,Institute for Protein Design, Department of Biochemistry, University of Washington, Seattle, Washington 98195, United States
| | - James M Fulcher
- Department of Biochemistry, University of Utah School of Medicine, 15 North Medical Drive East, Room 4100, Salt Lake City, Utah 84112, United States.,Biological Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Paul Spaltenstein
- Department of Biochemistry, University of Utah School of Medicine, 15 North Medical Drive East, Room 4100, Salt Lake City, Utah 84112, United States
| | - Michael S Kay
- Department of Biochemistry, University of Utah School of Medicine, 15 North Medical Drive East, Room 4100, Salt Lake City, Utah 84112, United States
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3
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Schilling PE, Kontaxis G, Dragosits M, Schiestl RH, Becker CFW, Maier I. Mannosylated hemagglutinin peptides bind cyanovirin-N independent of disulfide-bonds in complementary binding sites. RSC Adv 2020; 10:11079-11087. [PMID: 35495330 PMCID: PMC9050506 DOI: 10.1039/d0ra01128b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 03/10/2020] [Indexed: 01/11/2023] Open
Abstract
Cyanovirin-N (CV-N) has been shown to reveal broad neutralizing activity against human immunodeficiency virus (HIV) and to specifically bind Manα(1→2)Manα units exposed on various glycoproteins of enveloped viruses, such as influenza hemagglutinin (HA) and Ebola glycoprotein. Chemically synthesized dimannosylated HA peptides bound domain-swapped and dimeric CV-N with either four disulfide-bonds (Cys–Cys), or three Cys–Cys bonds and an intact fold of the high-affinity binding site at an equilibrium dissociation constant KD of 10 μM. Cys–Cys mutagenesis with ion-pairing amino-acids glutamic acid and arginine was calculated by in silico structure-based protein design and allowed for recognizing dimannose and dimannosylated peptide binding to low-affinity binding sites (KD ≈ 11 μM for one C58–C73 bond, and binding to dimannosylated peptide). In comparison, binding to HA was achieved based on one ion-pairing C58E–C73R substitution at KD = 275 nM, and KD = 5 μM for two C58E–C73R substitutions. We were utilizing a triazole bioisostere linkage to form the respective mannosylated-derivative on the HA peptide sequence of residues glutamine, glycine, and glutamic acid. Thus, mono- and dimannosylated peptides with N-terminal cysteine facilitated site-specific interactions with HA peptides, mimicking a naturally found N-linked glycosylation site on the HA head domain. Di-mannosylated peptides reveal mannose binding to cyanovirin-N (CV-N) low-affinity binding sites.![]()
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Affiliation(s)
- Philipp E Schilling
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna Währinger Straße 38 A-1090 Vienna Austria
| | - Georg Kontaxis
- Department of Structural and Computational Biology, Max Perutz Laboratories, University of Vienna Campus Vienna Bohrgasse 5 A-1030 Vienna Austria
| | - Martin Dragosits
- Department of Chemistry, Division of Biochemistry, University of Natural Resources and Life Sciences Muthgasse 18 A-1190 Vienna Austria
| | - Robert H Schiestl
- Department of Pathology and Laboratory Medicine, Geffen School of Medicine, University of California Los Angeles CA-90095 USA.,Department of Environmental Health Sciences, Fielding School of Public Health, University of California, Los Angeles 650 Charles E. Young Dr. South Los Angeles CA-90095 USA +1-310-267-2578 +1-310-267-2087
| | - Christian F W Becker
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna Währinger Straße 38 A-1090 Vienna Austria
| | - Irene Maier
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna Währinger Straße 38 A-1090 Vienna Austria.,Department of Environmental Health Sciences, Fielding School of Public Health, University of California, Los Angeles 650 Charles E. Young Dr. South Los Angeles CA-90095 USA +1-310-267-2578 +1-310-267-2087
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4
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Meuleman TJ, Cowton VM, Patel AH, Liskamp RM. Improving the aqueous solubility of HCV-E2 glycoprotein epitope mimics by cyclization using POLAR hinges. J Pept Sci 2020; 26:e3222. [PMID: 31984607 PMCID: PMC7050536 DOI: 10.1002/psc.3222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 09/05/2019] [Accepted: 09/09/2019] [Indexed: 12/20/2022]
Abstract
In this research we describe the improvement of the water-solubility of cyclic epitope mimics based on the HCV E2 glycoprotein by incorporation of suitable polar hinges. The poor solubility of epitope mimics based on peptide sequences in the envelope (E2) protein hampered their synthesis and purification and made it very difficult to prepare the molecular constructs for evaluation of their bioactivity. Since changes in the amino acid composition are hardly possible in these epitope mimics in order to increase water-solubility, a polar cyclization hinge may offer a remedy leading to a significant increase of polarity and therefore water solubility. These polar hinges were applied in the synthesis of better water-soluble HCV-E2 epitopes. An azide functionality in the polar hinges allowed attachment of a tetraethylene glycol linker by Cu-catalyzed azide-alkyne cyclo-addition (CuAAC) for a convenient conjugation to ELISA plates in order to evaluate the bio-activity of the epitope mimics. The immunoassays showed that the use of more polar cyclization hinges still supported anti-HCV antibody recognition and did not negatively influence their binding. This significantly increased solubility induced by polar hinges should therefore allow for the molecular construction and ultimate evaluation of synthetic vaccine molecules.
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Affiliation(s)
- Theodorus J. Meuleman
- School of Chemistry, University of GlasgowJoseph Black Building, University AvenueGlasgowG12 8QQUK
| | - Vanessa M. Cowton
- MRC‐University of Glasgow Centre for Virus ResearchGarscube Campus, Sir Michael Stoker Building, 464 Bearsden RoadGlasgowG61 1QHUK
| | - Arvind H. Patel
- MRC‐University of Glasgow Centre for Virus ResearchGarscube Campus, Sir Michael Stoker Building, 464 Bearsden RoadGlasgowG61 1QHUK
| | - Rob M.J. Liskamp
- School of Chemistry, University of GlasgowJoseph Black Building, University AvenueGlasgowG12 8QQUK
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5
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Synthesis of tris-tertiary amine CycloTriVeratrilene (TACTV) derivatives as water soluble pre-organized three aromatic ring containing molecular scaffolds for the construction of protein mimics. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151245] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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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] [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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7
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Conibear AC, Thewes K, Groysbeck N, Becker CFW. Multifunctional Scaffolds for Assembling Cancer-Targeting Immune Stimulators Using Chemoselective Ligations. Front Chem 2019; 7:113. [PMID: 30895175 PMCID: PMC6414710 DOI: 10.3389/fchem.2019.00113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 02/12/2019] [Indexed: 01/09/2023] Open
Abstract
Chemoselective ligations allow chemical biologists to functionalise proteins and peptides for biomedical applications and to probe biological processes. Coupled with solid phase peptide synthesis, chemoselective ligations enable not only the design of homogeneous proteins and peptides with desired natural and unnatural modifications in site-specific locations but also the design of new peptide and protein topologies. Although several well-established ligations are available, each method has its own advantages and disadvantages and they are seldom used in combination. Here we have applied copper-catalyzed azide-alkyne “click,” oxime, maleimide, and native chemical ligations to develop a modular synthesis of branched peptide and polymer constructs that act as cancer-targeting immune system engagers (ISErs) and functionalised them for detection in biological systems. We also note some potential advantages and pitfalls of these chemoselective ligations to consider when designing orthogonal ligation strategies. The modular synthesis and functionalization of ISErs facilitates optimisation of their activity and mechanism of action as potential cancer immunotherapies.
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Affiliation(s)
- Anne C Conibear
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Karine Thewes
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Nadja Groysbeck
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
| | - Christian F W Becker
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna, Vienna, Austria
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8
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Longin O, Hezwani M, van de Langemheen H, Liskamp RMJ. Synthetic antibody protein mimics of infliximab by molecular scaffolding on novel CycloTriVeratrilene (CTV) derivatives. Org Biomol Chem 2019; 16:5254-5274. [PMID: 29892733 DOI: 10.1039/c8ob01104d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Syntheses of novel semi-orthogonally protected CycloTriVeratrilene (CTV) analogues with enhanced water solubility, that is 3 and 4, derived from the previously described CTV scaffold derivative 2 are described here. These scaffolds 2-4 enabled a sequential introduction of three different complementarity determining region (CDR) mimics via Cu(i)-catalysed azide-alkyne cycloaddition towards medium-sized protein mimics denoted as "synthetic antibodies". The highly optimised sequential introduction enabled selective attachment of three different CDR mimics in a one-pot fashion. This approach of obtaining synthetic antibodies, demonstrated by the synthesis of paratope mimics of monoclonal antibody infliximab (Remicade®), provided a facile access to a range of (highly) pre-organised molecules bearing three different (cyclic) peptide segments and may find a wide range of applications in the field of protein-protein interaction disruptors as well as in the development of synthetic vaccines or lectin mimics. The prepared synthetic antibodies were tested for their affinity towards tumour necrosis factor alpha using surface plasmon resonance and synthetic antibodies with micromolar affinities were uncovered.
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Affiliation(s)
- Ondřej Longin
- School of Chemistry, Joseph Black Building, University of Glasgow, University Avenue, Glasgow G12 8QQ, UK and Department of Pharmaceutical Sciences, Faculty of Science, Utrecht University, P.O. Box 80082, NL-3508 TB Utrecht, The Netherlands.
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9
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10
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Maggi V, Bianchini F, Portioli E, Peppicelli S, Lulli M, Bani D, Del Sole R, Zanardi F, Sartori A, Fiammengo R. Gold Nanoparticles Functionalized with RGD‐Semipeptides: A Simple yet Highly Effective Targeting System for αVβ3Integrins. Chemistry 2018; 24:12093-12100. [DOI: 10.1002/chem.201801823] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 05/28/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Vito Maggi
- Center for Biomolecular Nanotechnologies@UniLeIstituto Italiano di Tecnologia (IIT) Via Barsanti 73010 Arnesano Lecce Italy
- Department of Engineering for InnovationUniversity of Salento Via per Monteroni Km 1 73100 Lecce Italy
| | - Francesca Bianchini
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”University of Florence Viale Morgagni 50 50134 Florence Italy
| | - Elisabetta Portioli
- Food and Drug DepartmentUniversity of Parma Parco Area delle Scienze 27a 43124 Parma Italy
| | - Silvia Peppicelli
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”University of Florence Viale Morgagni 50 50134 Florence Italy
| | - Matteo Lulli
- Department of Experimental and Clinical Biomedical Sciences “Mario Serio”University of Florence Viale Morgagni 50 50134 Florence Italy
| | - Daniele Bani
- Department of Experimental and Clinical MedicineUniversity of Florence Viale Pieraccini 6 50139 Florence Italy
| | - Roberta Del Sole
- Department of Engineering for InnovationUniversity of Salento Via per Monteroni Km 1 73100 Lecce Italy
| | - Franca Zanardi
- Food and Drug DepartmentUniversity of Parma Parco Area delle Scienze 27a 43124 Parma Italy
| | - Andrea Sartori
- Food and Drug DepartmentUniversity of Parma Parco Area delle Scienze 27a 43124 Parma Italy
| | - Roberto Fiammengo
- Center for Biomolecular Nanotechnologies@UniLeIstituto Italiano di Tecnologia (IIT) Via Barsanti 73010 Arnesano Lecce Italy
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11
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Conibear AC, Pötgens AJG, Thewes K, Altdorf C, Hilzendeger C, Becker CFW. Synthetic Cancer-Targeting Innate Immune Stimulators Give Insights into Avidity Effects. Chembiochem 2018; 19:459-469. [PMID: 29230922 DOI: 10.1002/cbic.201700522] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Indexed: 11/08/2022]
Abstract
Multispecific and multivalent antibodies are seen as promising cancer therapeutics, and numerous antibody fragments and derivatives have been developed to exploit avidity effects that result in increased selectivity. Most of these multispecific and multivalent antibody strategies make use of recombinant expression of antigen-binding modules. In contrast, chemical synthesis and chemoselective ligations can be used to generate a variety of molecules with different numbers and combinations of binding moieties in a modular and homogeneous fashion. In this study we synthesized a series of targeted immune system engagers (ISErs) by using solid-phase peptide synthesis and chemoselective ligations. To explore avidity effects, we constructed molecules bearing different numbers and combinations of two "binder" peptides that target ephrin A2 and integrin α3 receptors and an "effector" peptide that binds to formyl peptide receptors and stimulates an immune response. We investigated various strategies for generating multivalent and multispecific targeted innate immune stimulators and studied their activities in terms of binding to cancer cells and stimulation of immune cells. This study gives insights into the influence that multivalency and receptor density have on avidity effects and is useful for the design of potential anticancer therapeutics.
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Affiliation(s)
- Anne C Conibear
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - André J G Pötgens
- Syntab Therapeutics GmbH, ZBMT, Pauwelstrasse 17, 52074, Aachen, Germany
| | - Karine Thewes
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
| | - Claudia Altdorf
- Syntab Therapeutics GmbH, ZBMT, Pauwelstrasse 17, 52074, Aachen, Germany
| | | | - Christian F W Becker
- University of Vienna, Faculty of Chemistry, Institute of Biological Chemistry, Währinger Strasse 38, 1090, Vienna, Austria
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12
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A dual functional peptide-auxiliary conjugate for C-to-N and N-to-C sequential native chemical ligation of glycopeptides. Bioorg Med Chem 2017; 25:5016-5021. [PMID: 28579308 DOI: 10.1016/j.bmc.2017.05.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 05/16/2017] [Accepted: 05/21/2017] [Indexed: 11/23/2022]
Abstract
Long, homogeneously glycosylated peptides and proteins can be assembled from multiple segments via sequential chemoselective reactions. The efficiency of the synthesis depends on the effectiveness and number of steps and on their compatibility with glycosylation methods. Here, we present how the combination of auxiliary-mediated native chemical ligation and thioester generation via hydrazinolysis from Wang-type resin enables multiple, sequential N-to-C and C-to-N ligations. The method can be applied to glycosylated peptides and peptide α-thioesters and has the potential to be further extended to sequential glycosylation, thus paving the way to the synthesis of complex homogeneous glycoproteins. We applied this methodology to the synthesis of long MUC1 variants comprising 2, 4 and 6 tandem repeats and three O-glycosylations.
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13
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Conibear AC, Hager S, Mayr J, Klose MHM, Keppler BK, Kowol CR, Heffeter P, Becker CFW. Multifunctional α vβ 6 Integrin-Specific Peptide-Pt(IV) Conjugates for Cancer Cell Targeting. Bioconjug Chem 2017; 28:2429-2439. [PMID: 28796473 DOI: 10.1021/acs.bioconjchem.7b00421] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Increasing the specificity of cancer therapy, and thereby decreasing damage to normal cells, requires targeting to cancer-cell specific features. The αvβ6 integrin is a receptor involved in cell adhesion and is frequently up-regulated in cancer cells compared to normal cells. We have selected a peptide ligand reported to bind specifically to the β6 integrin and have synthesized a suite of multispecific molecules to explore the potential for targeting of cancer cells. A combination of solid-phase peptide synthesis and chemoselective ligations was used to synthesize multifunctional molecules composed of integrin-targeting peptides, cytotoxic platinum(IV) prodrugs, and fluorescent or affinity probes joined with flexible linkers. The modular synthesis approach facilitates the construction of peptide-drug conjugates with various valencies and properties in a convergent manner. The binding and specificity of the multifunctional peptide conjugates were investigated using a cell line transfected with the β6 integrin and fluorescence microscopy. This versatile and highly controlled approach to synthesizing labeled peptide-drug conjugates has the potential to target potent cytotoxic drugs specifically to cancer cells, reducing the doses required for effective treatment.
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Affiliation(s)
- Anne C Conibear
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
| | - Sonja Hager
- Institute of Cancer Research and Comprehensive Cancer Centre, Medical University of Vienna , Borschkegasse 8a, 1090 Vienna, Austria
| | - Josef Mayr
- Institute of Inorganic Chemistry, University of Vienna, Faculty of Chemistry , Währinger Straße 42, 1090 Vienna, Austria
| | - Matthias H M Klose
- Institute of Inorganic Chemistry, University of Vienna, Faculty of Chemistry , Währinger Straße 42, 1090 Vienna, Austria
| | - Bernhard K Keppler
- Institute of Inorganic Chemistry, University of Vienna, Faculty of Chemistry , Währinger Straße 42, 1090 Vienna, Austria
| | - Christian R Kowol
- Institute of Inorganic Chemistry, University of Vienna, Faculty of Chemistry , Währinger Straße 42, 1090 Vienna, Austria
| | - Petra Heffeter
- Institute of Cancer Research and Comprehensive Cancer Centre, Medical University of Vienna , Borschkegasse 8a, 1090 Vienna, Austria
| | - Christian F W Becker
- Faculty of Chemistry, Institute of Biological Chemistry, University of Vienna , Währinger Straße 38, 1090 Vienna, Austria
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14
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Abstract
Advances in bioconjugation and native protein modification are appearing at a blistering pace, making it increasingly time consuming for practitioners to identify the best chemical method for modifying a specific amino acid residue in a complex setting. The purpose of this perspective is to provide an informative, graphically rich manual highlighting significant advances in the field over the past decade. This guide will help triage candidate methods for peptide alteration and will serve as a starting point for those seeking to solve long-standing challenges.
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Affiliation(s)
- Justine N. deGruyter
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Lara R. Malins
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Phil S. Baran
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
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15
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Tran PT, Larsen CØ, Røndbjerg T, De Foresta M, Kunze MBA, Marek A, Løper JH, Boyhus LE, Knuhtsen A, Lindorff-Larsen K, Pedersen DS. Diversity-Oriented Peptide Stapling: A Third Generation Copper-Catalysed Azide-Alkyne Cycloaddition Stapling and Functionalisation Strategy. Chemistry 2017; 23:3490-3495. [DOI: 10.1002/chem.201700128] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Phuong Thu Tran
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Christian Ørnbøl Larsen
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Tobias Røndbjerg
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Martina De Foresta
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Micha B. A. Kunze
- Structural Biology and NMR Laboratory; Department of Biology; University of Copenhagen; Ole Maaloes Vej 5 2200 Copenhagen Denmark
| | - Ales Marek
- Institute of Organic Chemistry and Biochemistry; Academy of Sciences of the Czech Republic; 16610 Prague 6 Czech Republic
| | - Jacob Hartvig Løper
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Lotte-Emilie Boyhus
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Astrid Knuhtsen
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
| | - Kresten Lindorff-Larsen
- Structural Biology and NMR Laboratory; Department of Biology; University of Copenhagen; Ole Maaloes Vej 5 2200 Copenhagen Denmark
| | - Daniel Sejer Pedersen
- Department of Drug Design and Pharmacology; University of Copenhagen; Universitetsparken 2 2100 Copenhagen Denmark
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16
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Huo J, Hu H, Zhang M, Hu X, Chen M, Chen D, Liu J, Xiao G, Wang Y, Wen Z. A mini review of the synthesis of poly-1,2,3-triazole-based functional materials. RSC Adv 2017. [DOI: 10.1039/c6ra27012c] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Most recent advances of the synthesis of poly-1,2,3-triazole-based functional materials.
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Affiliation(s)
- Jingpei Huo
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Huawen Hu
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Min Zhang
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Xiaohong Hu
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Min Chen
- College of Materials Science and Energy Engineering
- Foshan University
- China
- Department of Chemistry
- University of Oslo
| | - Dongchu Chen
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Jinwen Liu
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Guifeng Xiao
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Yang Wang
- College of Materials Science and Energy Engineering
- Foshan University
- China
| | - Zhongliu Wen
- College of Materials Science and Energy Engineering
- Foshan University
- China
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