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Le Roy MM, Héry S, Saffon-Merceron N, Platas-Iglesias C, Troadec T, Tripier R. A Phosphine Oxide-Functionalized Cyclam as a Specific Copper(II) Chelator. Inorg Chem 2023; 62:8112-8122. [PMID: 37191969 DOI: 10.1021/acs.inorgchem.3c00329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Although cyclam-based ligands are among the strongest copper(II) chelators available, they also usually present good affinity for other divalent cations [Zn(II), Ni(II), and Co(II)], with no copper(II)-specific cyclam ligands having been described so far. As such a property is highly desirable in a wide range of applications, we present herein two novel phosphine oxide-appended cyclam ligands that could be efficiently synthesized through Kabachnik-Fields type reactions on protected cyclam precursors. Their copper(II) coordination properties were closely studied by different physicochemical techniques [electron paramagnetic resonance (EPR) and ultraviolet-visible (UV-vis) spectroscopies, X-ray diffraction, and potentiometry]. The mono(diphenylphosphine oxide)-functionalized ligand demonstrated a copper(II)-specific behavior, unprecedented within the cyclam family of ligands. This was evidenced by UV-vis complexation and competition studies with the parent divalent cations. Density functional theory calculations also confirmed that the particular ligand geometry in the complexes strongly favors copper(II) coordination over that of competing divalent cations, rationalizing the specificity observed experimentally.
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Affiliation(s)
- Marie M Le Roy
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Simon Héry
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (UAR 2599), 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071 A Coruña, Galicia, Spain
| | - Thibault Troadec
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Raphaël Tripier
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
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Maďar M, Koláčná L, Koucký F, Havlíčková J, Kuchár J, Kotek J, Kubíček V, Ludvík J, Hermann P. Derivatives of cyclam-1,8-diacetic acid: synthesis and complexes with divalent transition metal ions. J Organomet Chem 2023. [DOI: 10.1016/j.jorganchem.2023.122641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Brown AM, Butman JL, Lengacher R, Vargo NP, Martin KE, Koller A, Śmiłowicz D, Boros E, Robinson JR. N, N-Alkylation Clarifies the Role of N- and O-Protonated Intermediates in Cyclen-Based 64Cu Radiopharmaceuticals. Inorg Chem 2023; 62:1362-1376. [PMID: 36490364 DOI: 10.1021/acs.inorgchem.2c02907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Radioisotopes of Cu, such as 64Cu and 67Cu, are alluring targets for imaging (e.g., positron emission tomography, PET) and radiotherapeutic applications. Cyclen-based macrocyclic polyaminocarboxylates are one of the most frequently examined bifunctional chelators in vitro and in vivo, including the FDA-approved 64Cu radiopharmaceutical, Cu(DOTATATE) (Detectnet); however, connections between the structure of plausible reactive intermediates and their stability under physiologically relevant conditions remain to be established. In this study, we share the synthesis of a cyclen-based, N,N-alkylated spirocyclic chelate, H2DO3AC4H8, which serves as a model for N-protonation. Our combined experimental (in vitro and in vivo) and computational studies unravel complex pH-dependent speciation and enable side-by-side comparison of N- and O-protonated species of relevant 64Cu radiopharmaceuticals. Our studies suggest that N-protonated species are not inherently unstable species under physiological conditions and demonstrate the potential of N,N-alkylation as a tool for the rational design of future radiopharmaceuticals.
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Affiliation(s)
- Alexander M Brown
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Jana L Butman
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Raphael Lengacher
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Natasha P Vargo
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
| | - Kirsten E Martin
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Angus Koller
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Dariusz Śmiłowicz
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York11794, United States
| | - Jerome R Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island02912, United States
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Damerow H, Wängler B, Schirrmacher R, Fricker G, Wängler C. Synthesis of a Bifunctional Cross-Bridged Chelating Agent, Peptide Conjugation, and Comparison of 68 Ga Labeling and Complex Stability Characteristics with Established Chelators. ChemMedChem 2023; 18:e202200495. [PMID: 36259364 PMCID: PMC10100262 DOI: 10.1002/cmdc.202200495] [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: 09/14/2022] [Revised: 10/17/2022] [Indexed: 01/24/2023]
Abstract
[68 Ga]Ga3+ can be introduced into receptor-specific peptidic carriers via different chelators to obtain radiotracers for Positron Emission Tomography imaging and the chosen chelating agent considerably influences the in vivo pharmacokinetics of the corresponding radiopeptides. A chelator that should be a valuable alternative to established chelating agents for 68 Ga-radiolabeling of peptides would be a backbone-functionalized variant of the chelator CB-DO2A. Here, the bifunctional cross-bridged chelating agent CB-DO2A-GA was developed and compared to the established chelators DOTA, NODA-GA and DOTA-GA. For this purpose, CB-DO2A-GA(tBu)2 was introduced into the peptide Tyr3 -octreotate (TATE) and in direct comparison to the corresponding DOTA-, NODA-GA-, and DOTA-GA-modified TATE analogs, CB-DO2A-GA-TATE required harsher reaction conditions for 68 Ga-incorporation. Regarding the hydrophilicity profile of the resulting radiopeptides, a decrease in hydrophilicity from [68 Ga]Ga-DOTA-GA-TATE (logD(7.4) of -4.11±0.11) to [68 Ga]Ga-CB-DO2A-GA-TATE (-3.02±0.08) was observed. Assessing the stability against metabolic degradation and complex challenge, [68 Ga]Ga-CB-DO2A-GA demonstrated a very high kinetic inertness, exceeding that of [68 Ga]Ga-DOTA-GA. Therefore, CB-DO2A-GA is a valuable alternative to established chelating agents for 68 Ga-radiolabeling of peptides, especially when the formation of a very stable, positively charged 68 Ga-complex is pursued.
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Affiliation(s)
- Helen Damerow
- Clinic of Radiology and Nuclear Medicine, Biomedical ChemistryMedical Faculty Mannheim of Heidelberg University68167MannheimGermany
| | - Björn Wängler
- Clinic of Radiology and Nuclear Medicine, Molecular Imaging and RadiochemistryMedical Faculty Mannheim of Heidelberg University68167MannheimGermany
| | - Ralf Schirrmacher
- Department of Oncology, Division of Oncological ImagingUniversity of AlbertaEdmontonABT6G 1Z2Canada
| | - Gert Fricker
- Institute of Pharmacy and Molecular BiotechnologyUniversity of Heidelberg69120HeidelbergGermany
| | - Carmen Wängler
- Clinic of Radiology and Nuclear Medicine, Biomedical ChemistryMedical Faculty Mannheim of Heidelberg University68167MannheimGermany
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Uzal-Varela R, Patinec V, Tripier R, Valencia L, Maneiro M, Canle M, Platas-Iglesias C, Esteban-Gómez D, Iglesias E. On the dissociation pathways of copper complexes relevant as PET imaging agents. J Inorg Biochem 2022; 236:111951. [PMID: 35963110 DOI: 10.1016/j.jinorgbio.2022.111951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 07/15/2022] [Accepted: 07/27/2022] [Indexed: 02/07/2023]
Abstract
Several bifunctional chelators have been synthesized in the last years for the development of new 64Cu-based PET agents for in vivo imaging. When designing a metal-based PET probe, it is important to achieve high stability and kinetic inertness once the radioisotope is coordinated. Different competitive assays are commonly used to evaluate the possible dissociation mechanisms that may induce Cu(II) release in the body. Among them, acid-assisted dissociation tests or transchelation challenges employing EDTA or SOD are frequently used to evaluate both solution thermodynamics and the kinetic behavior of potential metal-based systems. Despite of this, the Cu(II)/Cu(I) bioreduction pathway that could be promoted by the presence of bioreductants still remains little explored. To fill this gap we present here a detailed spectroscopic study of the kinetic behavior of different macrocyclic Cu(II) complexes. The complexes investigated include the cross-bridge cyclam derivative [Cu(CB-TE1A)]+, whose structure was determined using single-crystal X-ray diffraction. The acid-assisted dissociation mechanism was investigated using HClO4 and HCl to analyse the effect of the counterion on the rate constants. The complexes were selected so that the effects of complex charge and coordination polyhedron could be assessed. Cyclic voltammetry experiments were conducted to investigate whether the reduction to Cu(I) falls within the window of common bioreducing agents. The most striking behavior concerns the [Cu(NO2Th)]2+ complex, a 1,4,7-triazacyclononane derivative containing two methylthiazolyl pendant arms. This complex is extremely inert with respect to dissociation following the acid-catalyzed mechanism, but dissociates rather quickly in the presence of a bioreductant like ascorbic acid.
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Affiliation(s)
- Rocío Uzal-Varela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Véronique Patinec
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Raphaël Tripier
- Univ Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Laura Valencia
- Departamento de Química Inorgánica, Universidade de Vigo, Facultad de Ciencias, 36310 Pontevedra, Spain
| | - Marcelino Maneiro
- Departamento de Química Inorgánica, Universidade de Santiago de Compostela, Facultade de Ciencias, 27002 Lugo, Spain
| | - Moisés Canle
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
| | - Emilia Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain.
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Yeh SHH, Chang WC, Hsu SM, Lin MH, Chung MC, Ke CS, Lee YC, Hwang CJ, Yang DJ. Chelation-Tamoxifen Conjugates for Imaging of Estrogen Receptors. Cancer Biother Radiopharm 2021; 37:30-40. [PMID: 34491835 DOI: 10.1089/cbr.2021.0169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Background: The differential diagnosis of estrogen receptor-positive (ER+) pathway-activated systems by using a labeled antiestrogen helps to select the patients for optimal response to endocrine therapy and to discontinue the treatment when resistance occurs. The authors' purpose was to synthesize chelator-tamoxifen conjugates for imaging ER (+) diseases. Materials and Methods: A hydroxypropyl linker was incorporated between either cyclam or cyclam diacetic acid and tamoxifen analog to produce SC-05-L-1 (Z-1-(1,4,8,11-tetraazacyclotetradecan-1-yl)-3-((5-(4-(2-(diethylamino)ethoxy) phenyl) -4,5-diphenylpent-4-en-1-yl)oxy)propan-2-ol) and SC-05-N-1 (Z-2,2'-(4-(3-((5-(4-(2-(diethylamino)ethoxy)phenyl)-4,5-diphenylpent-4-en-1-yl)oxy)-2-hydroxy-propyl) -1,4,8,11-tetraazacyclotetradecane-1,8-diyl)diacetic acid), respectively. In vitro cell uptake and cell/media ratios of 99mTc-SC-05-L-1 and 99mTc- SC-05-N-1 in ER (+) ovarian cancer cells (TOV-112D and OVCAR3) were performed. To ascertain the specificity of cell uptake, the cell uptake was blocked with estrone. In vivo 99mTc-SC-05-L-1 or 99mTc-SC-05-N-1 single-photon emission computed tomography/computed tomography was conducted in tumor-bearing rodents and compared to 18F-fluoro-2-deoxy-d-glucose (18F-FDG) positron emission tomography/magnetic resonance imaging (a reference technology). Results: The radiochemical purities of 99mTc-SC-05-L-1 and 99mTc-SC-05-N-1 were greater than 99% (n = 10). 99mTc-SC-05-L-1 had higher cell/media ratios than 99mTc-SC-05-N-1 in OVCAR-3 ER (+) cells. The cell uptake of 99mTc-SC-05-L-1 was blocked 80% by estrone indicating an ER-mediated process occurred. 99mTc-SC-05-N-1 was further selected for in vivo imaging studies due to higher maximum tolerated dose and superior water solubility than 99mTc-SC-05-L-1. 99mTc-SC-05-N-1 showed higher tumor uptake and tumor/muscle count density ratios than 18F-FDG in tumor-bearing rodents. Conclusion: 99mTc-SC-05-N-1 showed better differential diagnosis of ovarian tumors than 18F-FDG, indicating great promising in chelator-tamoxifen conjugate for ER pathway-directed systems imaging.
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Affiliation(s)
- Skye Hsin-Hsien Yeh
- Brain Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | | | - Shu-Meng Hsu
- Institute of Neuroscience, National Yang Ming Chaio Tung University, Taipei, Taiwan
| | - Ming Hsien Lin
- Department of Nuclear Medicine, Camillian Saint Mary's Hospital Luodong, Yilan, Taiwan
| | | | | | | | - Chorng-Jer Hwang
- Management Center, Camillian Saint Mary's Hospital Luodong, Yilan, Taiwan
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Driver CHS, Ebenhan T, Szucs Z, Parker MI, Zeevaart JR, Hunter R. Towards the development of a targeted albumin-binding radioligand: Synthesis, radiolabelling and preliminary in vivo studies. Nucl Med Biol 2021; 94-95:53-66. [PMID: 33550011 DOI: 10.1016/j.nucmedbio.2021.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/14/2020] [Accepted: 01/02/2021] [Indexed: 12/15/2022]
Abstract
INTRODUCTION The compound named 4-[10-(4-(2,5-dioxo-2,5-dihydro-1H-pyrrol-1-yl)butanamido)decyl]-11-[10-(β,d-glucopyranos-1-yl)-1-oxodecyl]-1,4,8,11-tetraazacyclotetradecane-1,8-diacetic acid is a newly synthesised molecule capable of binding in vivo to albumin to form a bioconjugate. This compound was given the name, GluCAB(glucose-chelator-albumin-binder)-maleimide-1. Radiolabelled GluCAB-maleimide-1 and subsequent bioconjugate is proposed for prospective oncological applications and works on the theoretical dual-targeting principle of tumour localization through the "enhanced permeability and retention (EPR) effect" and glucose metabolism. METHODS The precursor, GluCAB-amine-2, and subsequent GluCAB-maleimide-1 was synthesised via sequential regioselective, distal N-functionalisation of a cyclam template with a tether containing a synthetically-derived β-glucoside followed by a second linker to incorporate a maleimide moiety for albumin-binding. GluCAB-amine-2 was radiolabelled with [64Cu]CuCl2 in 0.1 M NH4OAc (pH 3.5, 90 °C, 30 min), purified and converted post-labeling in 0.01 M PBS to [64Cu]Cu-GluCAB-maleimide-1. Serum stability and protein binding studies were completed according to described methods. Healthy BALB/c ice (three groups of n = 5) were injected intravenously with [64Cu]Cu-TETA, [64Cu]Cu-GluCAB-amine-2 or [64Cu]Cu-GluCAB-maleimide-1 and imaged using microPET/CT at 1, 2, 4, 8 and 24 h post-injection. Biodistribution of the compounds were determined ex vivo after 24 h using gamma counting. RESULTS GluCAB-maleimide-1 was synthesised in five consecutive steps with an overall yield of 11%. [64Cu]Cu-GluCAB-amine-2 (97% labelling efficiency) was converted to [64Cu]Cu-GluCAB-maleimide-1 (93% conversion; 90% radiochemical purity). Biodistribution analysis indicated that the control compounds were rapidly and almost completely excreted as compared to [64Cu]Cu-GluCAB-maleimide-1 that exhibited a prolonged biological half-life (6-8 h). Both, [64Cu]Cu-GluCAB-maleimide-1 and -amine-2 were excreted through the hepatobiliary system but a higher hepatic presence of the albumin-bound compound was noted. CONCLUSIONS, ADVANCES IN KNOWLEDGE AND IMPLICATIONS FOR PATIENT CARE: This initial evaluation paves the way for further investigation into the tumour targeting potential of [64Cu]Cu-GluCAB-maleimide-1. An efficient targeted radioligand will allow for further development of a prospective theranostic agent for more personalized patient treatment which potentially improves overall patient prognosis, outcome and health care.
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Affiliation(s)
- Cathryn Helena Stanford Driver
- South African Nuclear Energy Corporation, Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West 0240, South Africa
| | - Thomas Ebenhan
- South African Nuclear Energy Corporation, Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West 0240, South Africa
| | | | - Mohammed Iqbal Parker
- Department of Medical Biochemistry and Institute for Infectious Disease and Molecular Medicine, University of Cape Town Medical School, University of Cape Town, Cape Town, South Africa
| | - Jan Rijn Zeevaart
- South African Nuclear Energy Corporation, Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West 0240, South Africa; Preclinical Drug Development Platform, North West University, Potchefstroom, South Africa.
| | - Roger Hunter
- Department of Chemistry, University of Cape Town, Cape Town, South Africa
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Knighton RC, Troadec T, Mazan V, Le Saëc P, Marionneau-Lambot S, Le Bihan T, Saffon-Merceron N, Le Bris N, Chérel M, Faivre-Chauvet A, Elhabiri M, Charbonnière LJ, Tripier R. Cyclam-Based Chelators Bearing Phosphonated Pyridine Pendants for 64Cu-PET Imaging: Synthesis, Physicochemical Studies, Radiolabeling, and Bioimaging. Inorg Chem 2021; 60:2634-2648. [PMID: 33496592 DOI: 10.1021/acs.inorgchem.0c03492] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we present the preparation of two novel cyclam-based macrocycles (te1pyp and cb-te1pyp), bearing phosphonate-appended pyridine side arms for the coordination of copper(II) ions in the context of 64Cu PET imaging. The two ligands have been prepared through conventional protection-alkylation sequences on cyclam, and their coordination properties have been thoroughly investigated. The corresponding copper complexes have been fully characterized in the solid state (X-ray diffraction analysis) and in solution (EPR and UV-vis spectroscopies). Potentiometric studies combined with spectrometry have also allowed us to determine their thermodynamic stability constants, confirming their high affinity for copper(II) cations. The kinetic inertness of the complexes has been verified by acid-assisted dissociation experiments, enabling their use in 64Cu-PET imaging in mice for the first time. Indeed, the two ligands could be quantitatively radiolabeled under mild conditions, and the resulting 64Cu complexes have demonstrated excellent stability in serum. PET imaging demonstrated a set of features emerging from the combination of picolinates and phosphonate units: high stability in vivo, fast clearance from the body via renal elimination, and most interestingly, very low fixation in the liver. This is in contrast with what was observed for monopicolinate cyclam (te1pa), which had a non-negligible accumulation in the liver, owing probably to its different charge and lipophilicity. These results thus pave the way for the use of such phosphonated pyridine chelators for in vivo 64Cu-PET imaging.
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Affiliation(s)
- Richard C Knighton
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Thibault Troadec
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Valérie Mazan
- Université de Strasbourg, CNRS, UMR 7042-LIMA, Equipe de Chimie Bioorganique et Médicinale, ECPM, 25 rue Becquerel, Strasbourg 67087, France
| | - Patricia Le Saëc
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Séverine Marionneau-Lambot
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Thomas Le Bihan
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | | | - Nathalie Le Bris
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Michel Chérel
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Alain Faivre-Chauvet
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Mourad Elhabiri
- Université de Strasbourg, CNRS, UMR 7042-LIMA, Equipe de Chimie Bioorganique et Médicinale, ECPM, 25 rue Becquerel, Strasbourg 67087, France
| | - Loïc J Charbonnière
- UMR 7178, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, ECPM, , 25 rue Becquerel, 67087 Strasbourg Cedex 2, France
| | - Raphaël Tripier
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
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Le Bihan T, Driver CHS, Ebenhan T, Le Bris N, Zeevaart JR, Tripier R. In Vivo Albumin-Binding of a C-Functionalized Cyclam Platform for 64 Cu-PET/CT Imaging in Breast Cancer Model. ChemMedChem 2020; 16:809-821. [PMID: 33191627 DOI: 10.1002/cmdc.202000800] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Indexed: 11/06/2022]
Abstract
An improved glucose-chelator-albumin bioconjugate (GluCAB) derivative, GluCAB-2Mal , has been synthesized and studied for in vivo 64 Cu-PET/CT imaging in breast cancer mice models together with its first-generation analogue GluCAB-1Mal . The radioligand works on the principle of tumor targeting through the enhanced permeability and retention (EPR) effect with a supportive role played by glucose metabolism. [64 Cu]Cu-GluCAB-2Mal (99 % RCP) exhibited high serum stability with immediate binding to serum proteins. In vivo experiments for comparison between tumor targeting of [64 Cu]Cu-GluCAB-2Mal and previous-generation [64 Cu]Cu-GluCAB-1Mal encompassed microPET/CT imaging and biodistribution analysis in an allograft E0771 breast cancer mouse model. Tumor uptake of [64 Cu]Cu-GluCAB-2Mal was clearly evident with twice as much accumulation as compared to its predecessor and a tumor/muscle ratio of up to 5 after 24 h. Further comparison indicated a decrease in liver accumulation for [64 Cu]Cu-Glu-CAB-2Mal .
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Affiliation(s)
- Thomas Le Bihan
- UMR CNRS 6521 CEMCA, University of Brest, 6 avenue Le Gorgeu, CS93837, 29200, Brest, France
| | - Cathryn H S Driver
- South African Nuclear Energy Corporation Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West, 0240, South Africa
| | - Thomas Ebenhan
- South African Nuclear Energy Corporation Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West, 0240, South Africa
| | - Nathalie Le Bris
- UMR CNRS 6521 CEMCA, University of Brest, 6 avenue Le Gorgeu, CS93837, 29200, Brest, France
| | - Jan Rijn Zeevaart
- South African Nuclear Energy Corporation Radiochemistry and NuMeRI PreClinical Imaging Facility, Elias Motsoaledi Street, R104 Pelindaba, North West, 0240, South Africa
| | - Raphaël Tripier
- UMR CNRS 6521 CEMCA, University of Brest, 6 avenue Le Gorgeu, CS93837, 29200, Brest, France
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Vaughn BA, Brown AM, Ahn SH, Robinson JR, Boros E. Is Less More? Influence of the Coordination Geometry of Copper(II) Picolinate Chelate Complexes on Metabolic Stability. Inorg Chem 2020; 59:16095-16108. [DOI: 10.1021/acs.inorgchem.0c02314] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brett A. Vaughn
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Alexander M. Brown
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Shin Hye Ahn
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
| | - Jerome R. Robinson
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
| | - Eszter Boros
- Department of Chemistry, Stony Brook University, 100 Nicolls Road, Stony Brook, New York 11794, United States
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11
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Shuvaev S, Suturina EA, Rotile NJ, Astashkin A, Ziegler CJ, Ross AW, Walker TL, Caravan P, Taschner IS. Revisiting dithiadiaza macrocyclic chelators for copper-64 PET imaging. Dalton Trans 2020; 49:14088-14098. [PMID: 32970072 PMCID: PMC7967274 DOI: 10.1039/d0dt02787a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis and characterisation of a dithiadiaza chelator NSNS2A, as well as copper complexes thereof are reported in this paper. Solution structures of copper(i/ii) complexes were calculated using density functional theory (DFT) and validated by both NMR and EPR spectroscopy. DFT calculations revealed a switch in the orientation of tetragonal distortion upon protonation, which might be responsible for poor stability of the Cu(II)NSNS2A complex in aqueous media, whilst the same switch in tetragonal distortion was experimentally observed by changing the solvent. The chelator was radiolabeled with 64Cu and evaluated using PET/MRI in rats. Despite a favorable redox potential to stabilize the cuprous state in vivo, the 64Cu(II)NSNS2A complex showed suboptimal stability compared to its tetraazamacrocyclic analogue, 64Cu(TE2A), with a significant 64Cu uptake in the liver.
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Affiliation(s)
- Sergey Shuvaev
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | | | - Nicholas J Rotile
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Andrei Astashkin
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ 85721, USA
| | | | - Alana W Ross
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Tia L Walker
- Department of Chemistry, Indiana University Northwest, Gary, IN 46408, USA.
| | - Peter Caravan
- A. A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA.
| | - Ian S Taschner
- Department of Chemistry, Indiana University Northwest, Gary, IN 46408, USA.
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12
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Gutfilen B, Souza SA, Valentini G. Copper-64: a real theranostic agent. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:3235-3245. [PMID: 30323557 PMCID: PMC6173185 DOI: 10.2147/dddt.s170879] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ongoing studies of physiological and pathological processes have led to a corresponding need for new radiopharmaceuticals, especially when studies are limited by the absence of a particular radiolabeled target. Thus, the development of new radioactive tracers is highly relevant and can represent a significant contribution to efforts to elucidate important phenomena in biology. Currently, theranostics represents a new frontier in the fields of medicine and nuclear medicine, with the same compound being used for both diagnosis and treatment. In the human body, copper (Cu) is the third most abundant metal and it plays a crucial role in many biological functions. Correspondingly, in various acquired and inherited pathological conditions, such as cancer and Alzheimer’s disease, alterations in Cu levels have been found. Moreover, a wide spectrum of neurodegenerative disorders are associated with higher or lower levels of Cu, as well as inappropriately bound or distributed levels of Cu in the brain. In human cells, the membrane protein, hCtr1, binds Cu in its Cu(I) oxidation state in an energy-dependent manner. Copper-64 (64Cu) is a cyclotron-produced radionuclide that has exhibited physical properties that are complementary for diagnosis and/or therapeutic purposes. To date, very few reports have described the clinical development of 64Cu as a radiotracer for cancer imaging. In this review, we highlight recent insights in our understanding and use of 64CuCl2 as a theranostic agent for various types of tumors. To the best of our knowledge, no adverse effects or clinically observable pharmacological effects have been described for 64CuCl2 in the literature. Thus, 64Cu represents a revolutionary radiopharmaceutical for positron emission tomography imaging and opens a new era in the theranostic field.
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Affiliation(s)
- Bianca Gutfilen
- Department of Radiology, School of Medicine, Laboratório de Marcação de Células e Moléculas (LMCM), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil,
| | - Sergio Al Souza
- Department of Radiology, School of Medicine, Laboratório de Marcação de Células e Moléculas (LMCM), Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil,
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13
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David T, Hlinová V, Kubíček V, Bergmann R, Striese F, Berndt N, Szöllősi D, Kovács T, Máthé D, Bachmann M, Pietzsch HJ, Hermann P. Improved Conjugation, 64-Cu Radiolabeling, in Vivo Stability, and Imaging Using Nonprotected Bifunctional Macrocyclic Ligands: Bis(Phosphinate) Cyclam (BPC) Chelators. J Med Chem 2018; 61:8774-8796. [PMID: 30180567 DOI: 10.1021/acs.jmedchem.8b00932] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Bifunctional derivatives of bis(phosphinate)-bearing cyclam (BPC) chelators bearing a carboxylate, amine, isothiocyanate, azide, or cyclooctyne in the BP side chain were synthesized. Conjugations required no protection of phosphinate or ring secondary amine groups. The ring amines were not reactive (proton protected) at pH < ∼8. For isothiocyanate coupling, oligopeptide N-terminal α-amines were more suitable than alkyl amines, e.g., Lys ω-amine (p Ka ∼7.5-8.5 and ∼10-11, respectively) due to lower basicity. The Cu-64 labeling was efficient at room temperature (specific activity ∼100 GBq/μmol; 25 °C, pH 6.2, ∼100 ligand equiv, 10 min). A representative Cu-64-BPC was tested in vivo showing fast clearance and no nonspecific radioactivity deposition. The monoclonal anti-PSCA antibody 7F5 conjugates with thiocyanate BPC derivative or NODAGA were radiolabeled and studied in PC3-PSCA tumor bearing mice by PET. The radiolabeled BPC conjugate was accumulated in the prostate tumor with a low off-target uptake, unlike Cu-64-labeled NODAGA-antibody conjugate. The BPC chelators have a great potential for theranostic applications of the Cu-64/Cu-67 matched pair.
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Affiliation(s)
- Tomáš David
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague , Czech Republic.,Institute of Radiopharmaceutical Cancer Research , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstrasse 400 , 01328 Dresden , Germany
| | - Veronika Hlinová
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague , Czech Republic
| | - Vojtěch Kubíček
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague , Czech Republic
| | - Ralf Bergmann
- Institute of Radiopharmaceutical Cancer Research , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstrasse 400 , 01328 Dresden , Germany
| | - Franziska Striese
- Institute of Radiopharmaceutical Cancer Research , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstrasse 400 , 01328 Dresden , Germany
| | - Nicole Berndt
- Partner Site Dresden , German Cancer Consortium (DKTK) , Fetscherstrasse 74 , 01307 Dresden , Germany.,German Cancer Research Center (DKFZ) , Im Neuenheimer Feld 280 , 69120 Heidelberg , Germany
| | - Dávid Szöllősi
- Department of Biophysics and Radiation Biology , Semmelweis University , Tűzoltó utca 37-47 , H-1094 Budapest , Hungary
| | - Tibor Kovács
- Institute of Radiochemistry and Radioecology , University of Pannonia , Egyetem St. 10 , H-8200 Veszprém , Hungary.,Social Organization for Radioecological Cleanliness , P.O. Box 158, H-8200 Veszprém , Hungary
| | - Domokos Máthé
- Department of Biophysics and Radiation Biology , Semmelweis University , Tűzoltó utca 37-47 , H-1094 Budapest , Hungary
| | - Michael Bachmann
- Institute of Radiopharmaceutical Cancer Research , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstrasse 400 , 01328 Dresden , Germany.,Tumor Immunology, University Cancer Center (UCC) , "Carl Gustav Carus" Technische Universität Dresden , Fetscherstrasse 74 , 01307 Dresden , Germany.,National Center for Tumor Diseases (NCT) , "Carl Gustav Carus" Technische Universität Dresden , Fetscherstrasse 74 , 01307 Dresden , Germany
| | - Hans-Jürgen Pietzsch
- Institute of Radiopharmaceutical Cancer Research , Helmholtz-Zentrum Dresden-Rossendorf , Bautzner Landstrasse 400 , 01328 Dresden , Germany
| | - Petr Hermann
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 2030 , 128 40 Prague , Czech Republic
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14
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Kubíček V, Böhmová Z, Ševčíková R, Vaněk J, Lubal P, Poláková Z, Michalicová R, Kotek J, Hermann P. NOTA Complexes with Copper(II) and Divalent Metal Ions: Kinetic and Thermodynamic Studies. Inorg Chem 2018; 57:3061-3072. [PMID: 29488748 DOI: 10.1021/acs.inorgchem.7b02929] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
H3nota derivatives are among the most studied macrocyclic ligands and are widely used for metal ion binding in biology and medicine. Despite more than 40 years of chemical research on H3nota, the comprehensive study of its solution chemistry has been overlooked. Thus, the coordination behavior of H3nota with several divalent metal ions was studied in detail with respect to its application as a chelator for copper radioisotopes in medical imaging and therapy. In the solid-state structure of the free ligand in zwitterionic form, one proton is bound in the macrocyclic cavity through a strong intramolecular hydrogen-bond system supporting the high basicity of the ring amine groups (log Ka = 13.17). The high stability of the [Cu(nota)]- complex (log KML = 23.33) results in quantitative complex formation, even at pH <1.5. The ligand is moderately selective for Cu(II) over other metal ions (e.g., log KML(Zn) = 22.32 and log KML(Ni) = 19.24). This ligand forms a more stable complex with Mg(II) than with Ca(II) and forms surprisingly stable complexes with alkali-metal ions (stability order Li(I) > Na(I) > K(I)). Thus, H3nota shows high selectivity for small metal ions. The [Cu(nota)]- complex is hexacoordinated at neutral pH, and the equatorial N2O2 interaction is strengthened by complex protonation. Detailed kinetic studies showed that the Cu(II) complex is formed quickly (millisecond time scale at cCu ≈ 0.1 mM) through an out-of-cage intermediate. Conversely, conductivity measurements revealed that the Zn(II) complex is formed much more slowly than the Cu(II) complex. The Cu(II) complex has medium kinetic inertness (τ1/2 46 s; pH 0, 25 °C) and is less resistant to acid-assisted decomplexation than Cu(II) complexes with H4dota and H4teta. Surprisingly, [Cu(nota)]- decomplexation is decelerated in the presence of Zn(II) ions due to the formation of a stable dinuclear complex. In conclusion, H3nota is a good carrier of copper radionuclides because the [Cu(nota)]- complex is predominantly formed over complexes with common impurities in radiochemical formulations, Zn(II) and Ni(II), for thermodynamic and, primarily, for kinetic reasons. Furthermore, the in vivo stability of the [Cu(nota)]- complex may be increased due to the formation of dinuclear complexes when it interacts with biometals.
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Affiliation(s)
- Vojtěch Kubíček
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 8 , 128 40 Prague 2 , Czech Republic
| | - Zuzana Böhmová
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 8 , 128 40 Prague 2 , Czech Republic
| | - Romana Ševčíková
- Department of Chemistry , Masaryk University , Kotlářská 2 , 611 37 Brno , Czech Republic
| | - Jakub Vaněk
- Department of Chemistry , Masaryk University , Kotlářská 2 , 611 37 Brno , Czech Republic.,Central European Institute of Technology (CEITEC) , Masaryk University , Kamenice 5 , 625 00 Brno , Czech Republic
| | - Přemysl Lubal
- Department of Chemistry , Masaryk University , Kotlářská 2 , 611 37 Brno , Czech Republic.,Central European Institute of Technology (CEITEC) , Masaryk University , Kamenice 5 , 625 00 Brno , Czech Republic
| | - Zuzana Poláková
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 8 , 128 40 Prague 2 , Czech Republic
| | - Romana Michalicová
- Department of Chemistry , Masaryk University , Kotlářská 2 , 611 37 Brno , Czech Republic
| | - Jan Kotek
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 8 , 128 40 Prague 2 , Czech Republic
| | - Petr Hermann
- Department of Inorganic Chemistry, Faculty of Science , Charles University , Hlavova 8 , 128 40 Prague 2 , Czech Republic
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15
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Sarkar S, Bhatt N, Ha YS, Huynh PT, Soni N, Lee W, Lee YJ, Kim JY, Pandya DN, An GI, Lee KC, Chang Y, Yoo J. High in Vivo Stability of 64Cu-Labeled Cross-Bridged Chelators Is a Crucial Factor in Improved Tumor Imaging of RGD Peptide Conjugates. J Med Chem 2018; 61:385-395. [DOI: 10.1021/acs.jmedchem.7b01671] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Swarbhanu Sarkar
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Nikunj Bhatt
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Yeong Su Ha
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Phuong Tu Huynh
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Nisarg Soni
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Woonghee Lee
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Yong Jin Lee
- Department
of RI-Convergence Research, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Jung Young Kim
- Department
of RI-Convergence Research, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Darpan N. Pandya
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Gwang Il An
- Department
of RI-Convergence Research, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Kyo Chul Lee
- Department
of RI-Convergence Research, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Yongmin Chang
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
| | - Jeongsoo Yoo
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 41944, South Korea
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16
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Gillet R, Roux A, Brandel J, Huclier-Markai S, Camerel F, Jeannin O, Nonat AM, Charbonnière LJ. A Bispidol Chelator with a Phosphonate Pendant Arm: Synthesis, Cu(II) Complexation, and 64Cu Labeling. Inorg Chem 2017; 56:11738-11752. [DOI: 10.1021/acs.inorgchem.7b01731] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Raphaël Gillet
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Amandine Roux
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Jérémy Brandel
- Laboratoire de Reconnaissance et Procédés
de Séparation Moléculaire, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Sandrine Huclier-Markai
- GIP Arronax, 1 rue Aronnax, CS 10112, F-44817 Saint-Herblain, France
- Subatech Laboratory, UMR 6457, Ecole des Mines de Nantes, IN2P3/CNRS, Université de Nantes, 4 rue Alfred Kastler, F-44307 Nantes, France
| | - Franck Camerel
- Laboratoire Matière Condensée et Systèmes
Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS
74205, F-35042 Rennes Cedex, France
| | - Olivier Jeannin
- Laboratoire Matière Condensée et Systèmes
Électroactifs, Institut des Sciences Chimiques de Rennes, UMR-CNRS 6226, 263 Avenue du Général Leclerc, CS
74205, F-35042 Rennes Cedex, France
| | - Aline M. Nonat
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
| | - Loïc J. Charbonnière
- Laboratoire d’Ingénierie
Moléculaire Appliquée à l’Analyse, Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
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17
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Frindel M, Le Saëc P, Beyler M, Navarro AS, Saï-Maurel C, Alliot C, Chérel M, Gestin JF, Faivre-Chauvet A, Tripier R. Cyclam te1pa for64Cu PET imaging. Bioconjugation to antibody, radiolabeling and preclinical application in xenografted colorectal cancer. RSC Adv 2017. [DOI: 10.1039/c6ra26003a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
te1pa conjugated to an F6 antibody was confirmed to be an interesting alternative to dota for64Cuin vivoPET imaging.
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Affiliation(s)
- Mathieu Frindel
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS
- UFR Sciences et Techniques
- 29238 Brest
- France
| | - Patricia Le Saëc
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
| | - Maryline Beyler
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS
- UFR Sciences et Techniques
- 29238 Brest
- France
| | - Anne-Sophie Navarro
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
| | - Catherine Saï-Maurel
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
| | | | - Michel Chérel
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
- Institut de Cancérologie de l'Ouest
| | - Jean-François Gestin
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
| | - Alain Faivre-Chauvet
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA)
- Unité INSERM 892 – CNRS 6299
- 44007 NANTES Cedex
- France
| | - Raphaël Tripier
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS
- UFR Sciences et Techniques
- 29238 Brest
- France
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18
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Wong JK, Ast S, Yu M, Flehr R, Counsell AJ, Turner P, Crisologo P, Todd MH, Rutledge PJ. Synthesis and Evaluation of 1,8-Disubstituted-Cyclam/Naphthalimide Conjugates as Probes for Metal Ions. ChemistryOpen 2016; 5:375-85. [PMID: 27547648 PMCID: PMC4981059 DOI: 10.1002/open.201600010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 12/21/2022] Open
Abstract
Fluorescent molecular probes for metal ions have a raft of potential applications in chemistry and biomedicine. We report the synthesis and photophysical characterisation of 1,8‐disubstituted‐cyclam/naphthalimide conjugates and their zinc complexes. An efficient synthesis of 1,8‐bis‐(2‐azidoethyl)cyclam has been developed and used to prepare 1,8‐disubstituted triazolyl‐cyclam systems, in which the pendant group is connected to triazole C4. UV/Vis and fluorescence emission spectra, zinc binding experiments, fluorescence quantum yield and lifetime measurements and pH titrations of the resultant bis‐naphthalimide ligand elucidate a complex pattern of photophysical behaviour. Important differences arise from the inclusion of two fluorophores in the one probe and from the variation of triazole substitution pattern (dye at C4 vs. N1). Introducing a second fluorophore greatly extends fluorescence lifetimes, whereas the altered substitution pattern at the cyclam amines exerts a major influence on fluorescence output and metal binding. Crystal structures of two key zinc complexes evidence variations in triazole coordination that mirror the solution‐phase behaviour of these systems.
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Affiliation(s)
| | - Sandra Ast
- School of ChemistryThe University of SydneySydneyNSW2006Australia
| | - Mingfeng Yu
- School of ChemistryThe University of SydneySydneyNSW2006Australia
| | - Roman Flehr
- Institute for ChemistryUniversity of PotsdamKarl-Liebknecht St. 24—2514476PotsdamGermany
| | | | - Peter Turner
- School of ChemistryThe University of SydneySydneyNSW2006Australia
- Crystal Structure Analysis FacilityThe University of SydneySydneyNSW2006Australia
| | | | - Matthew H. Todd
- School of ChemistryThe University of SydneySydneyNSW2006Australia
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19
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Gai Y, Sun L, Hui W, Ouyang Q, Anderson CJ, Xiang G, Ma X, Zeng D. New Bifunctional Chelator p-SCN-PhPr-NE3TA for Copper-64: Synthesis, Peptidomimetic Conjugation, Radiolabeling, and Evaluation for PET Imaging. Inorg Chem 2016; 55:6892-901. [PMID: 27347690 DOI: 10.1021/acs.inorgchem.6b00395] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bifunctional chelators play an important role in developing metallic radionuclide-based radiopharmaceuticals. In this study, a new bifunctional ligand, p-SCN-PhPr-NE3TA, was synthesized and conjugated to a very late antigen-4 targeting peptidomimetic, LLP2A, for evaluating its application in (64)Cu-based positron emission tomography (PET) imaging. The new ligand exhibited strong selective coordination of Cu(II), leading to a robust Cu complex, even in the presence of 10-fold Fe(III). The LLP2A conjugate of p-SCN-PhPr-NE3TA was prepared and successfully labeled with (64)Cu under mild conditions. The conjugate (64)Cu-NE3TA-PEG4-LLP2A showed significantly higher specific activity, compared with (64)Cu-NOTA-PEG4-LLP2A, while maintaining comparable serum stability. Subsequent biodistribution studies and PET imaging in mice bearing B16F10 xenografts confirmed its favorable in vivo performance and high tumor uptake with low background, rendering p-SCN-PhPr-NE3TA a promising bifunctional chelator for (64)Cu-based radiopharmaceuticals.
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Affiliation(s)
- Yongkang Gai
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , 13 Hangkong Road, Wuhan 430030, China.,Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States
| | - Lingyi Sun
- Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States
| | - Wenqi Hui
- College of Pharmacy, The Third Military Medical University , Chongqing 400038, China
| | - Qin Ouyang
- College of Pharmacy, The Third Military Medical University , Chongqing 400038, China
| | - Carolyn J Anderson
- Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States.,Departments of Pharmacology & Chemical Biology and Bioengineering, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States
| | - Guangya Xiang
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , 13 Hangkong Road, Wuhan 430030, China
| | - Xiang Ma
- School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology , 13 Hangkong Road, Wuhan 430030, China
| | - Dexing Zeng
- Department of Radiology, University of Pittsburgh , Pittsburgh, Pennsylvania 15219, United States
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20
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Halime Z, Frindel M, Camus N, Orain PY, Lacombe M, Bernardeau K, Chérel M, Gestin JF, Faivre-Chauvet A, Tripier R. New synthesis of phenyl-isothiocyanate C-functionalised cyclams. Bioconjugation and (64)Cu phenotypic PET imaging studies of multiple myeloma with the te2a derivative. Org Biomol Chem 2016; 13:11302-14. [PMID: 26419637 DOI: 10.1039/c5ob01618e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Azamacrocyclic bifunctional chelating agents (BCAs) are essential for the development of radiopharmaceuticals in nuclear medicine and we wish to prove that their bioconjugation by a function present on a carbon atom of the macrocyclic skeleton is a solution of choice to maintain their in vivo inertness. Based on our very recent methodology using a bisaminal template and selective N-alkylation approach, a new synthesis of conjugable C-functionalised teta, te2a and cb-te2a has been developed. These chelators have indeed a growing interest in nuclear medicine for positron emission tomography (PET) and radioimmunotherapy (RIT) where they show in several cases better complexation properties than dota or dota-like macrocycles, especially with (64)Cu or (67)Cu radioisotopes. Chelators are bearing an isothiocyanate grafting function introduced by C-alkylation to avoid as much as possible a critical decrease of their chelating properties. The synthesis is very efficient and yields the targeted ligands, teta-Ph-NCS, te2a-Ph-NCS and cb-te2a-Ph-NCS without fastidious work-up and could be easily extended to other cyclam based-BCAs. The newly synthetised te2a-Ph-NCS has been conjugated to an anti mCD138 monoclonal antibody (mAb) to evaluate its in vivo behavior and potentiality as BCA and to explore a first attempt of PET-phenotypic imaging in multiple myeloma (MM). Mass spectrometry analysis of the immunoconjugate showed that up to 4 chelates were conjugated per 9E7.4 mAb. The radiolabeling yield and specific activity post-purification of the bioconjugate 9E7.4-CSN-Ph-te2a were 95 ± 2.8% and 188 ± 27 MBq mg(-1) respectively and the immunoreactivity of (64)Cu-9E7.4-CSN-Ph-te2a was 81 ± 7%. Animal experiments were carried out on 5T33-Luc(+) tumor bearing mice, either in subcutaneous or orthotopic. To achieve PET imaging, mice were injected with (64)Cu-9E7.4-CNS-Ph-te2a and acquisitions were conducted 2 and 20 h post-injection (PI). A millimetric bone uptake was localised in a sacroiliac of a MM orthotopic tumor. Nonspecific uptakes were observed at 2 h PI but, unlike for the tumor, a significant decrease was observed at 20 h PI which improves the contrast of the images.
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Affiliation(s)
- Zakaria Halime
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences et Techniques, 6 Avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, France.
| | - Mathieu Frindel
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences et Techniques, 6 Avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, France. and Centre de Recherche en Cancérologie Nantes-Angers (CRCNA), Unité INSERM 892 - CNRS 6299, 8 quai Moncousu, BP 70721 44007 Nantes Cedex, France
| | - Nathalie Camus
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences et Techniques, 6 Avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, France.
| | - Pierre-Yves Orain
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences et Techniques, 6 Avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, France.
| | - Marie Lacombe
- Institut de Cancérologie de l'Ouest, 44800 Saint-Herblain, France
| | - Karine Bernardeau
- Centre de Recherche en Cancérologie Nantes-Angers (CRCNA), Unité INSERM 892 - CNRS 6299, 8 quai Moncousu, BP 70721 44007 Nantes Cedex, France
| | - Michel Chérel
- Institut de Cancérologie de l'Ouest, 44800 Saint-Herblain, France
| | | | | | - Raphaël Tripier
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences et Techniques, 6 Avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, France.
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21
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Satterlee AB, Huang L. Current and Future Theranostic Applications of the Lipid-Calcium-Phosphate Nanoparticle Platform. Theranostics 2016; 6:918-29. [PMID: 27217828 PMCID: PMC4876619 DOI: 10.7150/thno.14689] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/15/2016] [Indexed: 11/11/2022] Open
Abstract
Over the last four years, the Lipid-Calcium-Phosphate (LCP) nanoparticle platform has shown success in a wide range of treatment strategies, recently including theranostics. The high specific drug loading of radiometals into LCP, coupled with its ability to efficiently encapsulate many types of cytotoxic agents, allows a broad range of theranostic applications, many of which are yet unexplored. In addition to providing an overview of current medical imaging modalities, this review highlights the current theranostic applications for LCP using SPECT and PET, and discusses potential future uses of the platform by comparing it with both systemically and locally delivered clinical radiotherapy options as well as introducing its applications as an MRI contrast agent. Strengths and weaknesses of LCP and of nanoparticles in general are discussed, as well as caveats regarding the use of fluorescence to determine the accumulation or biodistribution of a probe.
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Affiliation(s)
- Andrew B. Satterlee
- 1. Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7571, USA
- 2. UNC and NCSU Joint Department of Biomedical Engineering, Chapel Hill, NC 27599
| | - Leaf Huang
- 1. Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7571, USA
- 2. UNC and NCSU Joint Department of Biomedical Engineering, Chapel Hill, NC 27599
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22
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Rodríguez-Rodríguez A, Regueiro-Figueroa M, Esteban-Gómez D, Tripier R, Tircsó G, Kálmán FK, Bényei AC, Tóth I, Blas AD, Rodríguez-Blas T, Platas-Iglesias C. Complexation of Ln3+ Ions with Cyclam Dipicolinates: A Small Bridge that Makes Huge Differences in Structure, Equilibrium, and Kinetic Properties. Inorg Chem 2016; 55:2227-39. [DOI: 10.1021/acs.inorgchem.5b02627] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Aurora Rodríguez-Rodríguez
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, Cedex 3, France
| | - Martín Regueiro-Figueroa
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - David Esteban-Gómez
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest, Cedex 3, France
| | - Gyula Tircsó
- Centre de Biophysique Moléculaire, CNRS, rue Charles Sadron, 45071 Orléans, Cedex 2, France
- Le Studium, Loire Valley Institute for Advanced Studies, 1 Rue Dupanloup, 45000 Orléans, France
| | | | | | | | - Andrés de Blas
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Teresa Rodríguez-Blas
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Carlos Platas-Iglesias
- Grupo QUICOOR,
Centro de Investigaciones Científicas Avanzadas (CICA) and
Departamento de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
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23
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Sok N, Baglin I, Rousselin Y, Boschetti F, Bernhard C, Goze C, Denat F. Reinforced cyclam derivatives functionalized on the bridging unit. NEW J CHEM 2016. [DOI: 10.1039/c5nj03488d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The introduction of one or two nitriles on the bridge of reinforced cyclams paves the way for the synthesis of new bifunctional chelating agents. X-ray structures of the chelators and of two copper complexes are reported.
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Affiliation(s)
- Nicolas Sok
- AgroSupDijon
- UMR PAM
- PCAV team
- 21000 Dijon
- France
| | - Isabelle Baglin
- ICMUB
- UMR CNRS 6302
- Université de Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Yoann Rousselin
- ICMUB
- UMR CNRS 6302
- Université de Bourgogne Franche-Comté
- 21000 Dijon
- France
| | | | - Claire Bernhard
- ICMUB
- UMR CNRS 6302
- Université de Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Christine Goze
- ICMUB
- UMR CNRS 6302
- Université de Bourgogne Franche-Comté
- 21000 Dijon
- France
| | - Franck Denat
- ICMUB
- UMR CNRS 6302
- Université de Bourgogne Franche-Comté
- 21000 Dijon
- France
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24
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Paterson BM, Donnelly PS. Macrocyclic Bifunctional Chelators and Conjugation Strategies for Copper-64 Radiopharmaceuticals. ADVANCES IN INORGANIC CHEMISTRY 2016. [DOI: 10.1016/bs.adioch.2015.09.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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25
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Rodríguez-Rodríguez A, Halime Z, Lima LMP, Beyler M, Deniaud D, Le Poul N, Delgado R, Platas-Iglesias C, Patinec V, Tripier R. Cyclams with Ambidentate Methylthiazolyl Pendants for Stable, Inert, and Selective Cu(II) Coordination. Inorg Chem 2015; 55:619-32. [DOI: 10.1021/acs.inorgchem.5b01779] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aurora Rodríguez-Rodríguez
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Zakaria Halime
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Luís M. P. Lima
- Instituto de Tecnologia Química e Biológica
António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Maryline Beyler
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - David Deniaud
- UFR Sciences et Techniques, Université de Nantes, UMR-CNRS 6230, 2, rue de la Houssinière, BP 92208, 44322 Nantes Cedex 3, France
| | - Nicolas Le Poul
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Rita Delgado
- Instituto de Tecnologia Química e Biológica
António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Carlos Platas-Iglesias
- Grupo QUICOOR, Centro de Investigaciones
Científicas Avanzadas (CICA) and Departamento de Química
Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus
da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Véronique Patinec
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Raphaël Tripier
- UFR des
Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
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26
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David T, Kubíček V, Gutten O, Lubal P, Kotek J, Pietzsch HJ, Rulíšek L, Hermann P. Cyclam Derivatives with a Bis(phosphinate) or a Phosphinato–Phosphonate Pendant Arm: Ligands for Fast and Efficient Copper(II) Complexation for Nuclear Medical Applications. Inorg Chem 2015; 54:11751-66. [DOI: 10.1021/acs.inorgchem.5b01791] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tomáš David
- Department of Inorganic
Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague, Czech Republic
| | - Vojtěch Kubíček
- Department of Inorganic
Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague, Czech Republic
| | - Ondrej Gutten
- Institute of Organic Chemistry and Biochemistry AS CR, Flemingovo náměstí
2, 16610 Prague, Czech Republic
| | - Přemysl Lubal
- Department of Chemistry, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
- Central
European Institute of Technology (CEITEC), Masaryk University, Kamenice 5, 62500 Brno, Czech Republic
| | - Jan Kotek
- Department of Inorganic
Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague, Czech Republic
| | - Hans-Jürgen Pietzsch
- Institute of Radiopharmaceutical
Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Lubomír Rulíšek
- Institute of Organic Chemistry and Biochemistry AS CR, Flemingovo náměstí
2, 16610 Prague, Czech Republic
| | - Petr Hermann
- Department of Inorganic
Chemistry, Faculty of Science, Charles University in Prague, Hlavova 2030, 12840 Prague, Czech Republic
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27
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Bhatt N, Soni N, Ha YS, Lee W, Pandya DN, Sarkar S, Kim JY, Lee H, Kim SH, An GI, Yoo J. Phosphonate Pendant Armed Propylene Cross-Bridged Cyclam: Synthesis and Evaluation as a Chelator for Cu-64. ACS Med Chem Lett 2015; 6:1162-6. [PMID: 26617972 DOI: 10.1021/acsmedchemlett.5b00362] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 10/14/2015] [Indexed: 11/28/2022] Open
Abstract
A propylene cross-bridged macrocyclic chelator with two phosphonate pendant arms (PCB-TE2P) was synthesized from cyclam. Various properties of the synthesized chelator, including Cu-complexation, Cu-complex stability, (64)Cu-radiolabeling, and in vivo behavior, were studied and compared with those of a previously reported propylene cross-bridged chelator (PCB-TE2A).
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Affiliation(s)
- Nikunj Bhatt
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Nisarg Soni
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Yeong Su Ha
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Woonghee Lee
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Darpan N. Pandya
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Swarbhanu Sarkar
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Jung Young Kim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Hochun Lee
- Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873, South Korea
| | - Sun Hee Kim
- Western Seoul Center, Korea Basic Science Institute, Seoul 120-140, Korea
| | - Gwang Il An
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Jeongsoo Yoo
- Department
of Molecular Medicine, BK21 Plus KNU Biomedical Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
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28
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Dale AV, An GI, Pandya DN, Ha YS, Bhatt N, Soni N, Lee H, Ahn H, Sarkar S, Lee W, Huynh PT, Kim JY, Gwon MR, Kim SH, Park JG, Yoon YR, Yoo J. Synthesis and Evaluation of New Generation Cross-Bridged Bifunctional Chelator for 64Cu Radiotracers. Inorg Chem 2015; 54:8177-86. [DOI: 10.1021/acs.inorgchem.5b01386] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ajit V. Dale
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Gwang Il An
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Darpan N. Pandya
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Yeong Su Ha
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Nikunj Bhatt
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Nisarg Soni
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Hochun Lee
- Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873, South Korea
| | - Heesu Ahn
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Swarbhanu Sarkar
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Woonghee Lee
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Phuong Tu Huynh
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
| | - Jung Young Kim
- Molecular
Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Mi-Ri Gwon
- Department
of Biomedical Science and Clinical Trial Center, BK21 PLUS, KNU Bio-Medical
Convergence Program, Kyungpook National University Graduate School and Hospital, Daegu 700-422, South Korea
| | - Sung Hong Kim
- Analysis Research Division, Daegu Center, Korea Basic Science Institute, Daegu 702-701, South Korea
| | - Jae Gyu Park
- Pohang Center for Evaluation of Biomaterials, Pohang Technopark Foundation, Gyeongbuk 790-834, South Korea
| | - Young-Ran Yoon
- Department
of Biomedical Science and Clinical Trial Center, BK21 PLUS, KNU Bio-Medical
Convergence Program, Kyungpook National University Graduate School and Hospital, Daegu 700-422, South Korea
| | - Jeongsoo Yoo
- Department of Molecular Medicine, BK21 Plus KNU Biomedical
Convergence Program, Kyungpook National University, Daegu 700-422, South Korea
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29
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Kubeil M, Zarschler K, Pietzsch J, Kraus W, Comba P, Stephan H. Copper(II) Cyclam Complexes withN-Propionic Acid Pendant Arms. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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30
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Camus N, Halime Z, le Bris N, Bernard H, Beyler M, Platas-Iglesias C, Tripier R. A [two-step/one week] synthesis of C-functionalized homocyclens and cyclams. Application to the preparation of conjugable BCAs without chelating properties alteration. RSC Adv 2015. [DOI: 10.1039/c5ra17133d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient synthesis ofC-functionalized azamacrocycles is presented together with a coordination study showing the week influence of the added appended group.
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Affiliation(s)
- Nathalie Camus
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
| | - Zakaria Halime
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
| | - Nathalie le Bris
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
| | - Hélène Bernard
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
| | - Maryline Beyler
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
| | - Carlos Platas-Iglesias
- Grupo QUICOOR
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental
- Universidade da Coruña
- Campus da Zapateira
- 15008 A Coruña
| | - Raphaël Tripier
- Université de Brest
- UMR-CNRS 6521/SFR148 ScInBioS UFR Sciences et Techniques
- 29238 Brest
- France
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31
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Pandya DN, Bhatt N, Dale AV, Kim JY, Lee H, Ha YS, Lee JE, An GI, Yoo J. New bifunctional chelator for 64Cu-immuno-positron emission tomography. Bioconjug Chem 2014; 24:1356-66. [PMID: 23883075 DOI: 10.1021/bc400192a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
A new tetraazamacrocyclic bifunctional chelator, TE2A-Bn-NCS, was synthesized in high overall yield from cyclam. An extra functional group (NCS) was introduced to the N-atom of TE2A for specific conjugation with antibody. The Cu complex of TE2A-Bn-NCS showed high kinetic stability in acidic decomplexation and cyclic voltammetry studies. X-ray structure determination of the Cu-TE2A-Bn-NH2 complex confirmed octahedral geometry, in which copper atom is strongly coordinated by four macrocyclic nitrogens in equatorial positions and two carboxylate oxygen atoms occupy the elongated axial positions. Trastuzumab was conjugated with TE2A-Bn-NCS and then radiolabeled with 64Cu quantitatively at room temperature within 10 min. Biodistribution studies showed that the 64Cu-labeled TE2A-Bn-NCS-trastuzumab conjugates maintain high stability in physiological conditions, and NIH3T6.7 tumors were clearly visualized up to 3 days by 64Cu-immuno-positron emission tomography imaging in animal models.
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32
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Zeng D, Ouyang Q, Cai Z, Xie XQ, Anderson CJ. New cross-bridged cyclam derivative CB-TE1K1P, an improved bifunctional chelator for copper radionuclides. Chem Commun (Camb) 2014; 50:43-5. [PMID: 24141371 DOI: 10.1039/c3cc45928d] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new cross-bridged cyclam chelator, CB-TE1K1P, was developed for copper-based radiopharmaceuticals, and this chelator can be labelled with (64)Cu under mild conditions in high specific activity. DBCO-PEG4-CB-TE1K1P was synthesized for conjugation to proteins, while Dde-CB-TE1K1P((t)Bu2)-OH was synthesized for solid-phase peptide synthesis. Examples of the conjugation chemistry, radiolabelling and serum stability of each are presented.
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Affiliation(s)
- Dexing Zeng
- Department of Radiology, University of Pittsburgh, 100 Technology Drive, Suite 452F, Pittsburgh, PA 15219, USA.
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Bodio E, Boujtita M, Julienne K, Le Saec P, Gouin SG, Hamon J, Renault E, Deniaud D. Synthesis and Characterization of a Stable Copper(I) Complex for Radiopharmaceutical Applications. Chempluschem 2014. [DOI: 10.1002/cplu.201402031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Cai Z, Anderson CJ. Chelators for copper radionuclides in positron emission tomography radiopharmaceuticals. J Labelled Comp Radiopharm 2014; 57:224-30. [PMID: 24347474 PMCID: PMC4277819 DOI: 10.1002/jlcr.3165] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 10/29/2013] [Indexed: 12/27/2022]
Abstract
The development of chelating agents for copper radionuclides in positron emission tomography radiopharmaceuticals has been a highly active and important area of study in recent years. The rapid evolution of chelators has resulted in highly specific copper chelators that can be readily conjugated to biomolecules and efficiently radiolabeled to form stable complexes in vivo. Chelators are not only designed for conjugation to monovalent biomolecules but also for incorporation into multivalent targeting ligands such as theranostic nanoparticles. These advancements have strengthened the role of copper radionuclides in the fields of nuclear medicine and molecular imaging. This review emphasizes developments of new copper chelators that have most greatly advanced the field of copper-based radiopharmaceuticals over the past 5 years.
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Affiliation(s)
- Zhengxin Cai
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Carolyn J. Anderson
- Department of Radiology, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Camus N, Halime Z, Le Bris N, Bernard H, Platas-Iglesias C, Tripier R. Full Control of the Regiospecific N-Functionalization of C-Functionalized Cyclam Bisaminal Derivatives and Application to the Synthesis of their TETA, TE2A, and CB-TE2A Analogues. J Org Chem 2014; 79:1885-99. [DOI: 10.1021/jo4028566] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Nathalie Camus
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences
et Techniques, 6 Avenue Victor le Gorgeu,
C.S. 93837, 29238 Brest, France
| | - Zakaria Halime
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences
et Techniques, 6 Avenue Victor le Gorgeu,
C.S. 93837, 29238 Brest, France
| | - Nathalie Le Bris
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences
et Techniques, 6 Avenue Victor le Gorgeu,
C.S. 93837, 29238 Brest, France
| | - Hélène Bernard
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences
et Techniques, 6 Avenue Victor le Gorgeu,
C.S. 93837, 29238 Brest, France
| | - Carlos Platas-Iglesias
- Departamento
de Química Fundamental, Universidade da Coruña, Campus
da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Raphaël Tripier
- Université de Brest, UMR-CNRS 6521/SFR148 ScInBioS, UFR Sciences
et Techniques, 6 Avenue Victor le Gorgeu,
C.S. 93837, 29238 Brest, France
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Zarschler K, Kubeil M, Stephan H. Establishment of two complementary in vitro assays for radiocopper complexes achieving reliable and comparable evaluation of in vivo stability. RSC Adv 2014. [DOI: 10.1039/c3ra47302c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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Abstract
Radiometals comprise many useful radioactive isotopes of various metallic elements. When properly harnessed, these have valuable emission properties that can be used for diagnostic imaging techniques, such as single photon emission computed tomography (SPECT, e.g.(67)Ga, (99m)Tc, (111)In, (177)Lu) and positron emission tomography (PET, e.g.(68)Ga, (64)Cu, (44)Sc, (86)Y, (89)Zr), as well as therapeutic applications (e.g.(47)Sc, (114m)In, (177)Lu, (90)Y, (212/213)Bi, (212)Pb, (225)Ac, (186/188)Re). A fundamental critical component of a radiometal-based radiopharmaceutical is the chelator, the ligand system that binds the radiometal ion in a tight stable coordination complex so that it can be properly directed to a desirable molecular target in vivo. This article is a guide for selecting the optimal match between chelator and radiometal for use in these systems. The article briefly introduces a selection of relevant and high impact radiometals, and their potential utility to the fields of radiochemistry, nuclear medicine, and molecular imaging. A description of radiometal-based radiopharmaceuticals is provided, and several key design considerations are discussed. The experimental methods by which chelators are assessed for their suitability with a variety of radiometal ions is explained, and a large selection of the most common and most promising chelators are evaluated and discussed for their potential use with a variety of radiometals. Comprehensive tables have been assembled to provide a convenient and accessible overview of the field of radiometal chelating agents.
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Affiliation(s)
- Eric W Price
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, CanadaV6T 1Z1.
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Dale AV, Pandya DN, Kim JY, Lee H, Ha YS, Bhatt N, Kim J, Seo JJ, Lee W, Kim SH, Yoon YR, An GI, Yoo J. Non-cross-bridged tetraazamacrocyclic chelator for stable (64)cu-based radiopharmaceuticals. ACS Med Chem Lett 2013; 4:927-31. [PMID: 24900586 DOI: 10.1021/ml400142s] [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: 04/16/2013] [Accepted: 07/25/2013] [Indexed: 01/10/2023] Open
Abstract
N-mono/dimethylated TE2A tetraazamacrocycles (MM-TE2A and DM-TE2A) were synthesized in high yields. Both Cu-MM/DM-TE2A complexes showed increased kinetic stability compared to that of Cu-TE2A, whereas Cu-DM-TE2A showed even higher in vitro stability than that of Cu-ECB-TE2A. MM-TE2A and DM-TE2A were quantitatively radiolabeled with (64)Cu ions and showed rapid clearance from the body to emerge as a potential efficient bifunctional chelator.
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Affiliation(s)
- Ajit V. Dale
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Darpan N. Pandya
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Jung Young Kim
- Molecular
Imaging Research Centre, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Hochun Lee
- Department of Energy Systems Engineering, Daegu Gyeongbuk Institute of Science & Technology, Daegu 711-873, South Korea
| | - Yeong Su Ha
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Nikunj Bhatt
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Jonghee Kim
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Jeong Ju Seo
- Department
of Biomedical Science
and Clinical Trial Center, Kyungpook National University Graduates School and Hospital, Daegu, South Korea
| | - Woonghee Lee
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
| | - Sung Hong Kim
- Analysis Research Division,
Daegu Center, Korea Basic Science Institute, Daegu 702-701, South Korea
| | - Young-Ran Yoon
- Department
of Biomedical Science
and Clinical Trial Center, Kyungpook National University Graduates School and Hospital, Daegu, South Korea
| | - Gwang Il An
- Molecular
Imaging Research Centre, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, South Korea
| | - Jeongsoo Yoo
- Department of Molecular Medicine, Kyungpook National University School of Medicine, Daegu
700-422, South Korea
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Dissociation kinetics study of copper(II) complexes of DO3A, DOTA and its monosubstituted derivatives. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Comba P, Emmerling F, Jakob M, Kraus W, Kubeil M, Morgen M, Pietzsch J, Stephan H. Copper(ii) chemistry of the functionalized macrocycle cyclam tetrapropionic acid. Dalton Trans 2013; 42:6142-8. [DOI: 10.1039/c2dt32356g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Measurement of the rate of copper(II) exchange for 64Cu complexes of bifunctional chelators. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.07.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Pandya DN, Dale AV, Kim JY, Lee H, Ha YS, An GI, Yoo J. New macrobicyclic chelator for the development of ultrastable 64Cu-radiolabeled bioconjugate. Bioconjug Chem 2012; 23:330-5. [PMID: 22329542 DOI: 10.1021/bc200539t] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ethylene cross-bridged cyclam with two acetate pendant arms, ECB-TE2A, is known to form the most kinetically stable (64)Cu complexes. However, its usefulness as a bifunctional chelator is limited because of its harsh radiolabeling conditions. Herein, we report new cross-bridged cyclam chelator for the development of ultrastable (64)Cu-radiolabeled bioconjugates. Propylene cross-bridged TE2A (PCB-TE2A) was successfully synthesized in an efficient way. The Cu(II) complex of PCB-TE2A exhibited much higher kinetic stability than ECB-TE2A in acid decomplexation studies, and also showed high resistance to reduction-mediated demetalation. Furthermore, the quantitative radiolabeling of PCB-TE2A with (64)Cu was achieved under milder conditions compared to ECB-TE2A. Biodistribution studies strongly indicate that the (64)Cu complexes of PCB-TE2A cleared out rapidly from the body with minimum decomplexation.
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Affiliation(s)
- Darpan N Pandya
- Department of Molecular Medicine, Kyungpook National University, Daegu 700-422, South Korea
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Šimeček J, Wester HJ, Notni J. Copper-64 labelling of triazacyclononane-triphosphinate chelators. Dalton Trans 2012; 41:13803-6. [DOI: 10.1039/c2dt31880f] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Pandya DN, Kim JY, Kwak W, Park JC, Gawande MB, An GI, Ryu EK, Yoo J. A New Synthesis of TE2A-a Potential Bifunctional Chelator for (64)Cu. Nucl Med Mol Imaging 2010; 44:185-92. [PMID: 24899948 DOI: 10.1007/s13139-010-0031-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2010] [Revised: 04/13/2010] [Accepted: 04/27/2010] [Indexed: 10/19/2022] Open
Abstract
PURPOSE The development of a new bifunctional chelator, which holds radiometals strongly in living systems, is a prerequisite for the successful application of disease-specific biomolecules to medical diagnosis and therapy. Recently, TE2A was reported to make kinetically more stable Cu(II) complexes than TETA. Herein, we report a new synthetic route to TE2A and explore its potential as a bifunctional chelator. METHODS TE2A was synthesized using the regioselective alkylation of benzyl bromoacetate and successive deprotection of the methylene bridge and benzyl group. Salt-free TE2A was radiolabeled with (64)Cu and microPET imaging was performed to follow the clearance pattern of the (64)Cu-TE2A complex. TE2A was conjugated with cyclic RGD peptide and the TE2A-c(RGDyK) conjugate was radiolabeled with (64)Cu. RESULTS TE2A was prepared in salt-free form from cyclam in an overall yield of 74%. The microPET images showed that (64)Cu-TE2A is excreted rapidly from the body by the kidney and liver. TE2A was successfully conjugated with c(RGDyK) peptide through one carboxylate group and the TE2A-c(RGDyK) conjugate was radiolabeled with (64)Cu in 94% yield within 30 min. CONCLUSION TE2A can be used by itself as a bifunctional chelator without any further structural modification.
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Affiliation(s)
- Darpan N Pandya
- Department of Molecular/Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, 700-422 Republic of Korea
| | - Jung Young Kim
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Wonjung Kwak
- Department of Molecular/Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, 700-422 Republic of Korea
| | - Jeong Chan Park
- Department of Molecular/Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, 700-422 Republic of Korea
| | - Manoj B Gawande
- Department of Molecular/Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, 700-422 Republic of Korea
| | - Gwang Il An
- Molecular Imaging Research Center, Korea Institute of Radiological and Medical Sciences, Seoul, South Korea
| | - Eun Kyoung Ryu
- Korea Basic Science Institute, Chungbuk, 363-883 Republic of Korea
| | - Jeongsoo Yoo
- Department of Molecular/Nuclear Medicine, School of Medicine, Kyungpook National University, Daegu, 700-422 Republic of Korea
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