1
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Doelman W, Ligthart NAM, van de Plassche MAT, de Geus MAR, Reinalda L, Isendoorn MME, Filippov DV, van Kasteren SI. Synthesis of Peptides Containing a Combination of Free and 2-trans-Cyclooctene Carbamate Protected Lysine Residues. Chembiochem 2024; 25:e202300786. [PMID: 38126970 DOI: 10.1002/cbic.202300786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
The allylic trans-cyclooctene (TCO) functionality facilitates powerful control over the spatiotemporal activity of bio-active molecules, enabling precision targeting of druglike and imaging modalities. However, the introduction of this function onto molecules remains chemically challenging, particularly for peptides. Modification with TCOs of this important class of biomolecules remains a challenge, primarily due to the sensitivity of the TCO group to the strong acids typically used in global deprotection during solid phase peptide synthesis. Here, we present a novel synthetic approach to site-selectively introduce TCO-groups in peptides. Our approach utilizes azide groups to mask amine functions, enabling selective introduction of the TCO on a single lysine residue. Staudinger reduction of the azides back to the corresponding amines proceeds without disturbing the sensitive TCO. We show that using our method, we can produce TCO-inactivated antigenic peptides of previously unseen complexity.
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Affiliation(s)
- W Doelman
- Leiden Institute of Chemistry, Leiden, the Netherlands
| | | | | | - M A R de Geus
- Leiden Institute of Chemistry, Leiden, the Netherlands
| | - L Reinalda
- Leiden Institute of Chemistry, Leiden, the Netherlands
| | | | - D V Filippov
- Leiden Institute of Chemistry, Leiden, the Netherlands
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2
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Pavlova AS, Ogurtsova PA, Koroleva LS, Serpokrylova IY, Lomzov AA, Pyshnaya IA, Silnikov VN, Pyshnyi DV. Novel Bisimidazole-Containing Peptidomimetic Molecules for Мetal-Independent RNA Cleavage: Synthesis and Solid-Phase Screening Method. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2020. [DOI: 10.1134/s1068162019060311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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3
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Albada B, Metzler-Nolte N. Organometallic–Peptide Bioconjugates: Synthetic Strategies and Medicinal Applications. Chem Rev 2016; 116:11797-11839. [DOI: 10.1021/acs.chemrev.6b00166] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Bauke Albada
- Laboratory of Organic Chemistry, Wageningen University & Research, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Nils Metzler-Nolte
- Inorganic
Chemistry I − Bioinorganic Chemistry, Ruhr University Bochum, Universitätsstrasse 150, 44780-D Bochum, Germany
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4
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Notni J, Wester HJ. A Practical Guide on the Synthesis of Metal Chelates for Molecular Imaging and Therapy by Means of Click Chemistry. Chemistry 2016; 22:11500-8. [PMID: 27333118 DOI: 10.1002/chem.201600928] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Indexed: 12/23/2022]
Abstract
The copper-catalyzed cycloaddition of organic azides and alkynes (CuAAC) is one of the most popular reactions for rapid assembly of multifunctional molecular frameworks from commercially available building blocks. It is also attractive for synthesis of conjugates of multidentate chelate ligands (chelators) with molecular targeting vectors, such as peptides or proteins, which serve as precursors for labeling with metal radionuclides or are useful as MRI contrast agents after Gd(III) complexation. However, applicability of CuAAC for such purposes is complicated by formation of unwanted copper chelates. The alternative use of copper-free click chemistry, for example, the strain-promoted alkyne-azide cycloaddition (SPAAC) or the Diels-Alder reaction of tetrazines and strained alkenes, entails other specific challenges: Introduction of large, isomerically non-homogeneous and hydrophobic linker groups affects product homogeneity and can severely change pharmacokinetic profiles. Against this background, this review elucidates scope and applicability of both Cu-catalyzed and Cu-free alkyne-azide cycloadditions pertinent to the elaboration of radiometal chelates and MRI contrast agents, with an emphasis on strategies to tackle the problem of copper complexation during CuAAC.
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Affiliation(s)
- Johannes Notni
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Strasse 3, 85748, Garching, Germany.
| | - Hans-Jürgen Wester
- Lehrstuhl für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meißner Strasse 3, 85748, Garching, Germany
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5
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Valverde IE, Vomstein S, Mindt TL. Toward the Optimization of Bombesin-Based Radiotracers for Tumor Targeting. J Med Chem 2016; 59:3867-77. [PMID: 27054526 DOI: 10.1021/acs.jmedchem.6b00025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The peptide bombesin (BBN) is a peptide with high affinity for the gastrin-releasing peptide receptor (GRPr), a receptor that is overexpressed by, for example, breast and prostate cancers. Thus, GRPr agonists can be used as cancer-targeting vectors to shuttle diagnostic and therapeutic agents into tumor cells. With the aim of optimizing the tumor targeting properties of a radiolabeled [Nle(14)]BBN(7-14) moiety, novel BBN(7-14)- and BBN(6-14)-based radioconjugates were synthesized, labeled with Lu-177, and fully evaluated in vitro and in vivo. The effect of residue and backbone modification on several parameters such as the internalization of the radiolabeled peptides into PC3 and AR42J tumor cells, their affinity toward the human GRPr, metabolic stability in blood plasma, and biodistribution in mice bearing GRPr-expressing PC3 xenografts was studied. As a result of our investigations, a novel radiolabeled GRPr agonist with a high tumor uptake and a high tumor-to-kidney ratio was identified.
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Affiliation(s)
- Ibai E Valverde
- Division of Radiopharmaceutical Chemistry, University of Basel Hospital , Petersgraben 4, 4031 Basel, Switzerland
| | - Sandra Vomstein
- Division of Radiopharmaceutical Chemistry, University of Basel Hospital , Petersgraben 4, 4031 Basel, Switzerland
| | - Thomas L Mindt
- Division of Radiopharmaceutical Chemistry, University of Basel Hospital , Petersgraben 4, 4031 Basel, Switzerland.,Ludwig Boltzmann Institute for Applied Diagnostics, General Hospital of Vienna , Währinger Gürtel 18-20, A-1090 Vienna, Austria
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6
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Castro V, Rodríguez H, Albericio F. CuAAC: An Efficient Click Chemistry Reaction on Solid Phase. ACS COMBINATORIAL SCIENCE 2016; 18:1-14. [PMID: 26652044 DOI: 10.1021/acscombsci.5b00087] [Citation(s) in RCA: 145] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Click chemistry is an approach that uses efficient and reliable reactions, such as Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC), to bind two molecular building blocks. CuAAC has broad applications in medicinal chemistry and other fields of chemistry. This review describes the general features and applications of CuAAC in solid-phase synthesis (CuAAC-SP), highlighting the suitability of this kind of reaction for peptides, nucleotides, small molecules, supramolecular structures, and polymers, among others. This versatile reaction is expected to become pivotal for meeting future challenges in solid-phase chemistry.
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Affiliation(s)
- Vida Castro
- Institute
for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, 08028-Barcelona, Spain
| | - Hortensia Rodríguez
- Institute
for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, 08028-Barcelona, Spain
- School
of Chemistry, Yachay Tech, Yachay City of Knowledge, Urcuqui, Ecuador
| | - Fernando Albericio
- Institute
for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine, 08028-Barcelona, Spain
- Department
of Organic Chemistry, University of Barcelona, 08028-Barcelona, Spain
- School of Chemistry & Physics, University of KwaZulu-Natal, 4001-Durban, South Africa
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7
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Mascarin A, Valverde IE, Mindt TL. Radiolabeled analogs of neurotensin (8–13) containing multiple 1,2,3-triazoles as stable amide bond mimics in the backbone. MEDCHEMCOMM 2016. [DOI: 10.1039/c6md00208k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Substitution of multiple amide bonds by metabolically stable 1,2,3-triazoles yields novel tumour-targeting neurotensin-based peptidomimetics with interesting biological properties.
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Affiliation(s)
- Alba Mascarin
- Division of Radiopharmaceutical Chemistry
- University of Basel Hospital
- CH-4031 Basel
- Switzerland
| | - Ibai E. Valverde
- Division of Radiopharmaceutical Chemistry
- University of Basel Hospital
- CH-4031 Basel
- Switzerland
| | - Thomas L. Mindt
- Division of Radiopharmaceutical Chemistry
- University of Basel Hospital
- CH-4031 Basel
- Switzerland
- Ludwig Boltzmann Institute for Applied Diagnostics
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8
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Mascarin A, Valverde IE, Vomstein S, Mindt TL. 1,2,3-Triazole Stabilized Neurotensin-Based Radiopeptidomimetics for Improved Tumor Targeting. Bioconjug Chem 2015; 26:2143-52. [DOI: 10.1021/acs.bioconjchem.5b00444] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alba Mascarin
- Division
of Radiopharmaceutical
Chemistry, University of Basel Hospital, Petersgraben 4, 4031 Basel, Switzerland
| | - Ibai E. Valverde
- Division
of Radiopharmaceutical
Chemistry, University of Basel Hospital, Petersgraben 4, 4031 Basel, Switzerland
| | - Sandra Vomstein
- Division
of Radiopharmaceutical
Chemistry, University of Basel Hospital, Petersgraben 4, 4031 Basel, Switzerland
| | - Thomas L. Mindt
- Division
of Radiopharmaceutical
Chemistry, University of Basel Hospital, Petersgraben 4, 4031 Basel, Switzerland
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9
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Valverde IE, Vomstein S, Fischer CA, Mascarin A, Mindt TL. Probing the Backbone Function of Tumor Targeting Peptides by an Amide-to-Triazole Substitution Strategy. J Med Chem 2015; 58:7475-84. [DOI: 10.1021/acs.jmedchem.5b00994] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ibai E. Valverde
- Division
of Radiopharmaceutical Chemistry, University of Basel Hospital, Petersgraben
4, 4031 Basel, Switzerland
| | - Sandra Vomstein
- Division
of Radiopharmaceutical Chemistry, University of Basel Hospital, Petersgraben
4, 4031 Basel, Switzerland
| | - Christiane A. Fischer
- Division
of Radiopharmaceutical Chemistry, University of Basel Hospital, Petersgraben
4, 4031 Basel, Switzerland
| | - Alba Mascarin
- Division
of Radiopharmaceutical Chemistry, University of Basel Hospital, Petersgraben
4, 4031 Basel, Switzerland
| | - Thomas L. Mindt
- Division
of Radiopharmaceutical Chemistry, University of Basel Hospital, Petersgraben
4, 4031 Basel, Switzerland
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10
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Marine JE, Liang X, Song S, Rudick JG. Azide-rich peptides via an on-resin diazotransfer reaction. Biopolymers 2015; 104:419-26. [PMID: 25753459 PMCID: PMC4516611 DOI: 10.1002/bip.22634] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 02/23/2015] [Accepted: 02/24/2015] [Indexed: 12/19/2022]
Abstract
Azide-containing amino acids are valuable building blocks in peptide chemistry, because azides are robust partners in several bioorthogonal reactions. Replacing polar amino acids with apolar, azide-containing amino acids in solid-phase peptide synthesis can be tricky, especially when multiple azide residues are to be introduced in the amino acid sequence. We present a strategy for effectively incorporating multiple azide-containing residues site-specifically.
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Affiliation(s)
- Jeannette E. Marine
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, United States
| | - Xiaoli Liang
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, United States
| | - Shuang Song
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, United States
| | - Jonathan G. Rudick
- Department of Chemistry, Stony Brook University, Stony Brook, NY 11794-3400, United States
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11
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Baranyai Z, Reich D, Vágner A, Weineisen M, Tóth I, Wester HJ, Notni J. A shortcut to high-affinity Ga-68 and Cu-64 radiopharmaceuticals: one-pot click chemistry trimerisation on the TRAP platform. Dalton Trans 2015; 44:11137-46. [PMID: 25999035 DOI: 10.1039/c5dt00576k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Due to its 3 carbonic acid groups being available for bioconjugation, the TRAP chelator (1,4,7-triazacyclononane-1,4,7-tris(methylene(2-carboxyethylphosphinic acid))) is chosen for the synthesis of trimeric bioconjugates for radiolabelling. We optimized a protocol for bio-orthogonal TRAP conjugation via Cu(I)-catalyzed Huisgen-cycloaddition of terminal azides and alkynes (CuAAC), including a detailed investigation of kinetic properties of Cu(II)-TRAP complexes. TRAP building blocks for CuAAC, TRAP(alkyne)3 and TRAP(azide)3 were obtained by amide coupling of propargylamine/3-azidopropyl-1-amine, respectively. For Cu(II) complexes of neat and triply amide-functionalized TRAP, the equilibrium properties as well as pseudo-first-order Cu(II)-transchelation, using 10 to 30 eq. of NOTA and EDTA, were studied by UV-spectrophotometry. Dissociation of any Cu(II)-TRAP species was found to be independent on the nature or excess of a competing chelator, confirming a proton-driven two-step mechanism. The respective thermodynamic stability constants (log K(ML): 19.1 and 17.6) and dissociation rates (k: 38 × 10(-6) and 7 × 10(-6) s(-1), 298 K, pH 4) show that the Cu(II) complex of the TRAP-conjugate possesses lower thermodynamic stability but higher kinetic inertness. At pH 2-3, its demetallation with NOTA was complete within several hours/days at room temperature, respectively, enabling facile Cu(II) removal after click coupling by direct addition of NOTA trihydrochloride to the CuAAC reaction mixture. Notwithstanding this, an extrapolated dissociation half life of >100 h at 37 °C and pH 7 confirms the suitability of TRAP-bioconjugates for application in Cu-64 PET (cf. t(1/2)(Cu-64) = 12.7 h). To showcase advantages of the method, TRAP(DUPA-Pep)3, a trimer of the PSMA inhibitor DUPA-Pep, was synthesized using 1 eq. TRAP(alkyne)3, 3.3 eq. DUPA-Pep-azide, 10 eq. Na ascorbate, and 1.2 eq. Cu(II)-acetate. Its PSMA affinity (IC50), determined by the competition assay on LNCaP cells, was 18-times higher than that of the corresponding DOTAGA monomer (IC50: 2 ± 0.1 vs. 36 ± 4 nM), resulting in markedly improved contrast in Ga-68-PET imaging. In conclusion, the kinetic inertness profile of Cu(II)-TRAP conjugates allows for simple Cu(II) removal after click functionalisation by means of transchelation, but also confirms their suitability for Cu-64-PET as demonstrated previously (Dalton Trans., 2012, 41, 13803).
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Affiliation(s)
- Zsolt Baranyai
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
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12
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13
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O'Connor A, Marsat JN, Mitrugno A, Flahive T, Moran N, Brayden D, Devocelle M. Poly(Ethylene glycol)-based backbones with high peptide loading capacities. Molecules 2014; 19:17559-77. [PMID: 25361422 PMCID: PMC6270934 DOI: 10.3390/molecules191117559] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/09/2014] [Accepted: 10/11/2014] [Indexed: 11/28/2022] Open
Abstract
Polymer-peptide conjugates are a promising class of compounds, where polymers can be used to overcome some of the limitations associated with peptides intended for therapeutic and/or diagnostic applications. Linear polymers such as poly(ethylene glycol) can be conjugated through terminal moieties and have therefore limited loading capacities. In this research, functionalised linear poly(ethylene glycol)s are utilised for peptide conjugation, to increase their potential loading capacities. These poly(ethylene glycol) derivatives are conjugated to peptide sequences containing representative side-chain functionalised amino acids, using different conjugation chemistries, including copper-catalysed azide-alkyne cycloaddition, amide coupling and thiol-ene reactions. Conjugation of a sequence containing the RGD motif to poly(allyl glycidyl ether) by the thiol-ene reaction, provided a conjugate which could be used in platelet adhesion studies.
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Affiliation(s)
- Aoife O'Connor
- Department of Pharmaceutical and Medicinal Chemistry, Centre for Synthesis and Chemical Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Jean-Noel Marsat
- Department of Pharmaceutical and Medicinal Chemistry, Centre for Synthesis and Chemical Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Annachiara Mitrugno
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Tom Flahive
- Department of Pharmaceutical and Medicinal Chemistry, Centre for Synthesis and Chemical Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - Niamh Moran
- Department of Molecular and Cellular Therapeutics, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
| | - David Brayden
- UCD School of Veterinary Medicine and UCD Conway Institute, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Marc Devocelle
- Department of Pharmaceutical and Medicinal Chemistry, Centre for Synthesis and Chemical Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin 2, Ireland.
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14
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van Eldijk MB, Smits FCM, Vermue N, Debets MF, Schoffelen S, van Hest JCM. Synthesis and Self-Assembly of Well-Defined Elastin-Like Polypeptide–Poly(ethylene glycol) Conjugates. Biomacromolecules 2014; 15:2751-9. [DOI: 10.1021/bm5006195] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mark B. van Eldijk
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
- Dutch
Polymer Institute, P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Ferdinanda C. M. Smits
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Niek Vermue
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Marjoke F. Debets
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Sanne Schoffelen
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Jan C. M. van Hest
- Radboud University Nijmegen, Institute for Molecules
and Materials, Heyendaalseweg
135, 6525 AJ Nijmegen, The Netherlands
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15
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Fransen P, Pulido D, Sevrin C, Grandfils C, Albericio F, Royo M. High Control, Fast Growth OEG-Based Dendron Synthesis via a Sequential Two-Step Process of Copper-Free Diazo Transfer and Click Chemistry. Macromolecules 2014. [DOI: 10.1021/ma500166e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Peter Fransen
- Chemistry & Molecular Pharmacology Institute for Research in Biomedicine, Baldiri Reixac 10, 08028 Barcelona, Spain
| | - Daniel Pulido
- Combinatorial
Chemistry Barcelona Science Park, Baldiri
Reixac 10, 08028 Barcelona, Spain
| | | | | | - Fernando Albericio
- Chemistry & Molecular Pharmacology Institute for Research in Biomedicine, Baldiri Reixac 10, 08028 Barcelona, Spain
- Department of Organic Chemistry, University of BarcelonaMartí, i Franquès 1-11, 08028 Barcelona, Spain
- School of Chemistry & Physics, University of KwaZulua-Natal, 4001 Durban, South Africa
| | - Miriam Royo
- Combinatorial
Chemistry Barcelona Science Park, Baldiri
Reixac 10, 08028 Barcelona, Spain
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16
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Valverde IE, Huxol E, Mindt TL. Radiolabeled antagonistic bombesin peptidomimetics for tumor targeting. J Labelled Comp Radiopharm 2013; 57:275-8. [PMID: 24327435 DOI: 10.1002/jlcr.3162] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 10/29/2013] [Indexed: 01/30/2023]
Abstract
The replacement of amide bonds in the backbone of peptides by proteolytically stable 1,2,3-triazole isosteres can provide novel peptidomimetics with promising properties for the development of tumor-targeting radiopeptides. On the basis of our previous work with radiolabeled agonistic bombesin (BBN) derivatives of the sequence [Nle(14) ]BBN(7-14), we substituted selected amide bonds of the structurally closely related antagonistic peptide analog JMV594. With the exception of the C-terminal modification, amide-to-triazole substitutions tolerated by [Nle(14) ]BBN(7-14) without loss of biological function led to abolished receptor affinity in the case of JMV594. These findings provide an additional piece of evidence for the currently disputed differences in the modes of action of agonistic and antagonistic gastrin-releasing peptide receptor (GRPR)-targeting radiopeptides.
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Affiliation(s)
- Ibai E Valverde
- Department of Radiology and Nuclear Medicine, University of Basel Hospital, Division of Radiopharmaceutical Chemistry, Petersgraben 4, 4031, Basel, Switzerland
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17
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Castro V, Blanco-Canosa JB, Rodriguez H, Albericio F. Imidazole-1-sulfonyl azide-based diazo-transfer reaction for the preparation of azido solid supports for solid-phase synthesis. ACS COMBINATORIAL SCIENCE 2013; 15:331-4. [PMID: 23721561 DOI: 10.1021/co4000437] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An efficient, standard, mild, and copper-free imidazole-1-sulfonyl azide hydrochloride-based diazo-transfer method was implemented in a set of four resins that cover a broad range of hydrophobicity. The imidazole-1-sulfonyl azide hydrochloride is easily prepared/commercially available, stable upon storage at 4 °C, and proved to be a suitable alternative to triflyl azide for diazo-transfer reactions in amine functionalized resins. We have successfully applied the azido resins for the conjugation of a TFA-labile Wang-type linker using Click Chemistry.
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Affiliation(s)
- Vida Castro
- Institute for Research in Biomedicine (IRB Barcelona), 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
08028-Barcelona, Spain
| | - Juan B. Blanco-Canosa
- Institute for Research in Biomedicine (IRB Barcelona), 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
08028-Barcelona, Spain
| | - Hortensia Rodriguez
- Institute for Research in Biomedicine (IRB Barcelona), 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
08028-Barcelona, Spain
| | - Fernando Albericio
- Institute for Research in Biomedicine (IRB Barcelona), 08028-Barcelona, Spain
- CIBER-BBN, Networking Centre on Bioengineering, Biomaterials and Nanomedicine,
08028-Barcelona, Spain
- Department
of Organic Chemistry, University of Barcelona, 08028-Barcelona, Spain
- School of Chemistry and Physics, University of KwaZulu-Natal, 4001-Durban, South Africa
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18
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Valverde IE, Bauman A, Kluba CA, Vomstein S, Walter MA, Mindt TL. 1,2,3-Triazole als Mimetika der Amid-Bindung: Ein Triazol-Scan führt zu Protease-resistenten Peptidmimetika für das Tumor-Targeting. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303108] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Valverde IE, Bauman A, Kluba CA, Vomstein S, Walter MA, Mindt TL. 1,2,3-Triazoles as Amide Bond Mimics: Triazole Scan Yields Protease-Resistant Peptidomimetics for Tumor Targeting. Angew Chem Int Ed Engl 2013; 52:8957-60. [DOI: 10.1002/anie.201303108] [Citation(s) in RCA: 132] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 05/24/2013] [Indexed: 12/24/2022]
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20
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Rhodes AJ, Deming TJ. Soluble, Clickable Polypeptides from Azide-Containing N-Carboxyanhydride Monomers. ACS Macro Lett 2013; 2:351-354. [PMID: 35581836 DOI: 10.1021/mz4001089] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report a method for the synthesis of soluble, well-defined, azide-functionalized polypeptides via living polymerization of new azide-containing amino acid N-carboxyanhydride (NCA) monomers. Homo and diblock azidopolypeptides were prepared with controlled segment lengths using (PMe3)4Co initiator and were subsequently modified by reaction with functional alkyne reagents. The azide groups were found to be quantitatively converted to the corresponding triazole derivatives, and the functionalized polymers were obtained in high yield. This methodology provides a facile and straightforward method for preparation of functional and side-chain reactive, high molecular weight polypeptides.
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Affiliation(s)
- Allison J. Rhodes
- Department of Chemistry and Biochemistry, and ‡Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
| | - Timothy J. Deming
- Department of Chemistry and Biochemistry, and ‡Department of Bioengineering, University of California, Los Angeles, Los Angeles, California 90095, United States
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Silyl-Based Alkyne-Modifying Linker for the Preparation of C-Terminal Acetylene-Derivatized Protected Peptides. J Org Chem 2012; 77:9954-8. [DOI: 10.1021/jo302305d] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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