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Yue WK, Zhang T, Shandre Mugan R, Barlow N, Chalmers DK, Pouton CW, Thompson PE. Targeting Melanocortin Receptors Using S NAr-Type Macrocyclization: A Doubly Orthogonal Route to Cyclic Peptide Conjugates. J Med Chem 2023; 66:3273-3283. [PMID: 36808973 DOI: 10.1021/acs.jmedchem.2c01587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
While a range of strategies exist to accomplish peptide macrocyclization, they are frequently limited by the need for orthogonal protection or provide little opportunity for structural diversification. We have evaluated an efficient macrocyclization method that employs nucleophilic aromatic substitution (SNAr) to create thioether macrocycles. This versatile macrocyclization, orthogonal to conventional peptide synthesis, can be performed in solution on unprotected peptidomimetics or on resin-bound peptides with side-chain protection in place. We show that the electron-withdrawing groups present in the products can be further utilized in subsequent orthogonal reactions to alter the peptide properties or to add prosthetic groups. The macrocyclization strategy was applied to the design of melanocortin ligands, generating a library of potent melanocortin agonists that exhibit distinct subtype selectivity.
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Affiliation(s)
- Wenxiao K Yue
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Tianxia Zhang
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Rekha Shandre Mugan
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Nicholas Barlow
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - David K Chalmers
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Colin W Pouton
- Drug Delivery, Disposition and Dynamics, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Philip E Thompson
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
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Ferreira VFC, Oliveira BL, Santos JD, Correia JDG, Farinha CM, Mendes F. Targeting of the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) Protein with a Technetium-99m Imaging Probe. ChemMedChem 2018; 13:1469-1478. [PMID: 29864241 DOI: 10.1002/cmdc.201800187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 05/18/2018] [Indexed: 12/28/2022]
Abstract
Cystic fibrosis (CF) is caused by mutations in the gene that encodes the CF transmembrane conductance regulator (CFTR) protein. The most common mutation, F508del, leads to almost total absence of CFTR at the plasma membrane, a defect potentially corrected via drug-based therapies. Herein, we report the first proof-of-principle study of a noninvasive imaging probe able to detect CFTR at the plasma membrane. We radiolabeled the CFTR inhibitor, CFTRinh -172a, with technetium-99m via a pyrazolyl-diamine chelating unit, yielding a novel 99m Tc(CO)3 complex. A non-radioactive surrogate showed that the structural modifications introduced in the inhibitor did not affect its activity. The radioactive complex was able to detect plasma membrane CFTR, shown by its significantly higher uptake in wild-type versus mutated cells. Furthermore, assessment of F508del CFTR pharmacological correction in human cells using the radioactive complex revealed differences in corrector versus control uptake, recapitulating the biochemical correction observed for the protein.
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Affiliation(s)
- Vera F C Ferreira
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066, Bobadela LRS, Portugal
| | - Bruno L Oliveira
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066, Bobadela LRS, Portugal
- Current address: Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK
| | - João D Santos
- BioISI-Biosystems and Integrative Sciences Institute, Faculty of Sciences, Universidade de Lisboa, Campo Grande C8, 1749-016, Lisboa, Portugal
| | - João D G Correia
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066, Bobadela LRS, Portugal
| | - Carlos M Farinha
- BioISI-Biosystems and Integrative Sciences Institute, Faculty of Sciences, Universidade de Lisboa, Campo Grande C8, 1749-016, Lisboa, Portugal
| | - Filipa Mendes
- C2TN-Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10, 2695-066, Bobadela LRS, Portugal
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Morais M, Zamora-Carreras H, Raposinho PD, Oliveira MC, Pantoja-Uceda D, Correia JDG, Jiménez MA. NMR Insights into the Structure-Function Relationships in the Binding of Melanocortin Analogues to the MC1R Receptor. Molecules 2017; 22:molecules22071189. [PMID: 28714883 PMCID: PMC6152105 DOI: 10.3390/molecules22071189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/12/2017] [Accepted: 07/12/2017] [Indexed: 01/25/2023] Open
Abstract
Linear and cyclic analogues of the α-melanocyte stimulating hormone (α-MSH) targeting the human melanocortin receptor 1 (MC1R) are of pharmacological interest for detecting and treating melanoma. The central sequence of α-MSH (His-Phe-Arg-Trp) has been identified as being essential for receptor binding. To deepen current knowledge on the molecular basis for α-MSH bioactivity, we aimed to understand the effect of cycle size on receptor binding. To that end, we synthesised two macrocyclic isomeric α-MSH analogues, c[NH-NO2-C6H3-CO-His-DPhe-Arg-Trp-Lys]-Lys-NH2 (CycN-K6) and c[NH-NO2-C6H3-CO-His-DPhe-Arg-Trp-Lys-Lys]-NH2 (CycN-K7). Their affinities to MC1R receptor were determined by competitive binding assays, and their structures were analysed by 1H and 13C NMR. These results were compared to those of the previously reported analogue c[S-NO2-C6H3-CO-His-DPhe-Arg-Trp-Cys]-Lys-NH2 (CycS-C6). The MC1R binding affinity of the 22-membered macrocyclic peptide CycN-K6 (IC50 = 155 ± 16 nM) is higher than that found for the 25-membered macrocyclic analogue CycN-K7 (IC50 = 495 ± 101 nM), which, in turn, is higher than that observed for the 19-membered cyclic analogue CycS-C6 (IC50 = 1770 ± 480 nM). NMR structural study indicated that macrocycle size leads to changes in the relative dispositions of the side chains, particularly in the packing of the Arg side chain relative to the aromatic rings. In contrast to the other analogues, the 22-membered cycle’s side chains are favorably positioned for receptor interaction.
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Affiliation(s)
- Maurício Morais
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela LRS, Portugal.
- Division of Imaging Sciences and Biomedical Engineering, King's College London, 4th Floor Lambeth Wing, St Thomas' Hospital, London SE1 7EH, UK.
| | - Héctor Zamora-Carreras
- Instituto de Química Física Rocasolano (IQFR), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 119, 28006 Madrid, Spain.
| | - Paula D Raposinho
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela LRS, Portugal.
| | - Maria Cristina Oliveira
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela LRS, Portugal.
| | - David Pantoja-Uceda
- Instituto de Química Física Rocasolano (IQFR), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 119, 28006 Madrid, Spain.
| | - João D G Correia
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139.7), 2695-066 Bobadela LRS, Portugal.
| | - M Angeles Jiménez
- Instituto de Química Física Rocasolano (IQFR), Consejo Superior de Investigaciones Científicas (CSIC), Serrano 119, 28006 Madrid, Spain.
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Morais M, Campello MPC, Xavier C, Heemskerk J, Correia JDG, Lahoutte T, Caveliers V, Hernot S, Santos I. Radiolabeled Mannosylated Dextran Derivatives Bearing an NIR-Fluorophore for Sentinel Lymph Node Imaging. Bioconjug Chem 2014; 25:1963-70. [DOI: 10.1021/bc500336a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Maurício Morais
- Centro
de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Maria P. C. Campello
- Centro
de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Catarina Xavier
- In
Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Johannes Heemskerk
- Nuclear
Medicine Department, Universitair Ziekenhuis, 1090 Brussels, Belgium
| | - João D. G. Correia
- Centro
de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
| | - Tony Lahoutte
- In
Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium
- Nuclear
Medicine Department, Universitair Ziekenhuis, 1090 Brussels, Belgium
| | - Vicky Caveliers
- In
Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium
- Nuclear
Medicine Department, Universitair Ziekenhuis, 1090 Brussels, Belgium
| | - Sophie Hernot
- In
Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, 1050 Brussels, Belgium
| | - Isabel Santos
- Centro
de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 139,7), 2695-066 Bobadela LRS, Portugal
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Kasten BB, Ma X, Liu H, Hayes TR, Barnes CL, Qi S, Cheng K, Bottorff SC, Slocumb WS, Wang J, Cheng Z, Benny PD. Clickable, hydrophilic ligand for fac-[M(I)(CO)3](+) (M = Re/(99m)Tc) applied in an S-functionalized α-MSH peptide. Bioconjug Chem 2014; 25:579-92. [PMID: 24568284 PMCID: PMC3983144 DOI: 10.1021/bc5000115] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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The copper(I)-catalyzed azide–alkyne
cycloaddition (CuAAC)
click reaction was used to incorporate alkyne-functionalized dipicolylamine
(DPA) ligands (1 and 3) for fac-[MI(CO)3]+ (M = Re/99mTc) complexation into an α-melanocyte stimulating hormone (α-MSH)
peptide analogue. A novel DPA ligand with carboxylate substitutions
on the pyridyl rings (3) was designed to increase the
hydrophilicity and to decrease in vivo hepatobiliary retention of fac-[99mTcI(CO)3]+ complexes used in single photon emission computed tomography (SPECT)
imaging studies with targeting biomolecules. The fac-[ReI(CO)3(3)] complex (4) was used for chemical characterization and X-ray crystal
analysis prior to radiolabeling studies between 3 and fac-[99mTcI(OH2)3(CO)3]+. The corresponding 99mTc
complex (4a) was obtained in high radiochemical yields,
was stable in vitro for 24 h during amino acid challenge and serum
stability assays, and showed increased hydrophilicity by log P analysis compared to an analogous complex with nonfunctionalized
pyridine rings (2a). An α-MSH peptide functionalized
with an azide was labeled with fac-[MI(CO)3]+ using both click, then chelate (CuAAC reaction with 1 or 3 followed by
metal complexation) and chelate, then click (metal
complexation of 1 and 3 followed by CuAAC
with the peptide) strategies to assess the effects of CuAAC conditions
on fac-[MI(CO)3]+ complexation within a peptide framework. The peptides from the click, then chelate strategy had different HPLC tR’s and in vitro stabilities compared
to those from the chelate, then click strategy, suggesting
nonspecific coordination of fac-[MI(CO)3]+ using this synthetic route. The fac-[MI(CO)3]+-complexed peptides from
the chelate, then click strategy showed >90% stability
during in vitro challenge conditions for 6 h, demonstrated high affinity
and specificity for the melanocortin 1 receptor (MC1R) in IC50 analyses, and led to moderately high uptake in B16F10 melanoma cells.
Log P analysis of the 99mTc-labeled peptides
confirmed the enhanced hydrophilicity of the peptide bearing the novel,
carboxylate-functionalized DPA chelate (10a′)
compared to the peptide with the unmodified DPA chelate (9a′). In vivo biodistribution analysis of 9a′ and 10a′ showed moderate tumor uptake in a B16F10 melanoma
xenograft mouse model with enhanced renal uptake and surprising intestinal
uptake for 10a′ compared to predominantly hepatic
accumulation for 9a′. These results, coupled with
the versatility of CuAAC, suggests this novel, hydrophilic chelate
can be incorporated into numerous biomolecules containing azides for
generating targeted fac-[MI(CO)3]+ complexes in future studies.
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Affiliation(s)
- Benjamin B Kasten
- Department of Chemistry, Washington State University , Pullman, Washington 99164, United States
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de Almeida A, Oliveira BL, Correia JD, Soveral G, Casini A. Emerging protein targets for metal-based pharmaceutical agents: An update. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.01.031] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Morais M, Oliveira BL, Correia JDG, Oliveira MC, Jiménez MA, Santos I, Raposinho PD. Influence of the Bifunctional Chelator on the Pharmacokinetic Properties of 99mTc(CO)3-Labeled Cyclic α-Melanocyte Stimulating Hormone Analog. J Med Chem 2013; 56:1961-73. [DOI: 10.1021/jm301647t] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maurício Morais
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
| | - Bruno L. Oliveira
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
| | - João D. G. Correia
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
| | - Maria Cristina Oliveira
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
| | - Maria Angeles Jiménez
- Instituto de Química
Física Rocasolano, Consejo Superior de Investigaciones Científicas
(CSIC), Serrano 119, 28006 Madrid, Spain
| | - Isabel Santos
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
| | - Paula D. Raposinho
- Unidade de Ciências Químicas
e Radiofarmacêuticas, IST/ITN, Instituto Superior Técnico,
Universidade Técnica de Lisboa, Estrada Nacional 10, 2686-953,
Sacavém, Portugal
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