1
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Jian Y, Mo G, Xu W, Liu Y, Zhang Z, Ding Y, Gao R, Xu J, Zhu J, Shu K, Yan Z, Carniato F, Platas-Iglesias C, Ye F, Botta M, Dai L. Chiral Pyclen-Based Heptadentate Chelates as Highly Stable MRI Contrast Agents. Inorg Chem 2024; 63:8462-8475. [PMID: 38642052 DOI: 10.1021/acs.inorgchem.4c01028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2024]
Abstract
In recent years, pyclen-based complexes have attracted a great deal of interest as magnetic resonance imaging (MRI) contrast agents (CAs) and luminescent materials, as well as radiopharmaceuticals. Remarkably, gadopiclenol, a Gd(III) bishydrated complex featuring a pyclen-based heptadentate ligand, received approval as a novel contrast agent for clinical MRI application in 2022. To maximize stability and efficiency, two novel chiral pyclen-based chelators and their complexes were developed in this study. Gd-X-PCTA-2 showed significant enhancements in both thermodynamic and kinetic stabilities compared to those of the achiral parent derivative Gd-PCTA. 1H NMRD profiles reveal that both chiral gadolinium complexes (Gd-X-PCTA-1 and Gd-X-PCTA-2) have a higher relaxivity than Gd-PCTA, while variable-temperature 17O NMR studies show that the two inner-sphere water molecules have distinct residence times τMa and τMb. Furthermore, in vivo imaging demonstrates that Gd-X-PCTA-2 enhances the signal in the heart and kidneys of the mice, and the chiral Gd complexes exhibit the ability to distinguish between tumors and normal tissues in a 4T1 mouse model more efficiently than that of the clinical agent gadobutrol. Biodistribution studies show that Gd-PCTA and Gd-X-PCTA-2 are primarily cleared by a renal pathway, with 24 h residues of Gd-X-PCTA-2 in the liver and kidney being lower than those of Gd-PCTA.
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Affiliation(s)
- Yong Jian
- Joint Centre of Translational Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China 325035
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Gengshen Mo
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Weiyuan Xu
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Yao Liu
- Sichuan Key Laboratory of Medical Imaging, School of Pharmacy and Nanchong Key laboratory of MRI Contrast Agent, North Sichuan Medical College, Nanchong, People's Republic of China 637000
| | - Zhichao Zhang
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Yinghui Ding
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Ruonan Gao
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Jiao Xu
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Jiang Zhu
- Sichuan Key Laboratory of Medical Imaging, School of Pharmacy and Nanchong Key laboratory of MRI Contrast Agent, North Sichuan Medical College, Nanchong, People's Republic of China 637000
| | - Kun Shu
- Department of Radiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China 325027
| | - Zhihan Yan
- Department of Radiology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China 325027
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, Alessandria, Italy 15121
| | - Carlos Platas-Iglesias
- Departamento de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, A Coruña, Spain 15008
| | - Fangfu Ye
- Joint Centre of Translational Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China 325035
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale T. Michel 11, Alessandria, Italy 15121
| | - Lixiong Dai
- Joint Centre of Translational Medicine, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China 325035
- Joint Centre of Translational Medicine, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, People's Republic of China 325000
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2
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Paranawithana NN, Chiaffarelli R, Kretschmer J, Buchanan E, Lopez K, Zhao P, Kiefer G, Jurek P, Martins AF, Sherry AD. Enhancing r1 Relaxivity in GdDOTA-Monoamide Complexes through Polar Group-Mediated Ordering of Second-Sphere Water Molecules. Inorg Chem 2024; 63:4072-4077. [PMID: 38385753 DOI: 10.1021/acs.inorgchem.3c03639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
This study was designed to test whether the single appended phosphonate group in GdDOTA-1AmP is sufficient for catalyzing the exchange of proton from the single inner-sphere water-exchanging molecule. Unlike the other phosphonate derivatives in this series, GdDOTA-1AmP showed a surprisingly smooth increase in r1 relaxivity from 3.0 to 6.3 mM-1 s-1 at 20 MHz as the pH was lowered from 9 to 2.5. In comparison to the bis-, tris-, and tetrakis-phosphonate analogues, which all show a biphasic dependence of r1 with changes in pH, the unique r1 versus pH characteristics of GdDOTA-1AmP are shown to closely parallel deprotonation of the single appended phosphonate group. Although the tissue biodistribution and clearance rates of GdDOTA-1AmP are more favorable than the other more highly charged phosphonate derivatives, the pH dependency of r1 is substantially reduced at magnetic fields typically used for small animal imaging (7 and 9.4T), so the attractiveness of this new molecule for quantitative imaging of tissue pH is diminished. However, this study provides some new insights into the feasibility of designing pH-responsive MRI contrast agents based upon fundamental acid-base prototropic mechanisms.
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Affiliation(s)
- Namini N Paranawithana
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Remy Chiaffarelli
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Jan Kretschmer
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Emily Buchanan
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Katherine Lopez
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Piyu Zhao
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Garry Kiefer
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Paul Jurek
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - André F Martins
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
- Advanced Imaging Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - A Dean Sherry
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Advanced Imaging Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
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3
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Uzal-Varela R, Rodríguez-Rodríguez A, Wang H, Esteban-Gómez D, Brandariz I, Gale EM, Caravan P, Platas-Iglesias C. Prediction of Gd(III) complex thermodynamic stability. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214606] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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4
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Harriswangler C, Caneda-Martínez L, Rousseaux O, Esteban-Gómez D, Fougère O, Pujales-Paradela R, Valencia L, Fernández MI, Lepareur N, Platas-Iglesias C. Versatile Macrocyclic Platform for the Complexation of [ natY/ 90Y]Yttrium and Lanthanide Ions. Inorg Chem 2022; 61:6209-6222. [PMID: 35418232 PMCID: PMC9044452 DOI: 10.1021/acs.inorgchem.2c00378] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
We report a macrocyclic
ligand (H3L6) based
on a 3,6,10,13-tetraaza-1,8(2,6)-dipyridinacyclotetradecaphane
platform containing three acetate pendant arms and a benzyl group
attached to the fourth nitrogen atom of the macrocycle. The X-ray
structures of the YL6 and TbL6 complexes reveal nine coordination
of the ligand to the metal ions through the six nitrogen atoms of
the macrocycle and three oxygen atoms of the carboxylate pendants.
A combination of NMR spectroscopic studies (1H, 13C, and 89Y) and DFT calculations indicated that the structure
of the YL6 complex in the solid
state is maintained in an aqueous solution. The detailed study of
the emission spectra of the EuL6 and TbL6 complexes revealed
Ln3+-centered emission with quantum yields of 7.0 and 60%,
respectively. Emission lifetime measurements indicate that the ligand
offers good protection of the metal ions from surrounding water molecules,
preventing the coordination of water molecules. The YL6 complex is remarkably inert with respect to complex dissociation,
with a lifetime of 1.7 h in 1 M HCl. On the other hand, complex formation
is fast (∼1 min at pH 5.4, 2 × 10–5 M).
Studies using the 90Y-nuclide confirmed fast radiolabeling
since [90Y]YL6 is
nearly quantitatively formed (radiochemical yield (RCY) > 95) in
a
short time over a broad range of pH values from ca. 2.4 to 9.0. Challenging
experiments in the presence of excess ethylenediaminetetraacetic acid
(EDTA) and in human serum revealed good stability of the [90Y]YL6 complex. All of these
experiments combined suggest the potential application of H3L6 derivatives as Y-based radiopharmaceuticals. A new versatile asymmetric ligand based
on an 18-membered
macrocycle possessing three acetate pendant arms and a benzyl moiety
provides fast complexation with both natY(III) and 90Y(III), as well as slow dissociation kinetics. A detailed
structural study in the solid state and in solution evidences nona
coordination of the metal ion by the ligand, offering good protection
from solvent water molecules. These favorable properties make this
ligand an attractive candidate to develop yttrium-based radiopharmaceuticals.
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Affiliation(s)
- Charlene Harriswangler
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
| | - Laura Caneda-Martínez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
| | - Olivier Rousseaux
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
| | - Olivier Fougère
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Rosa Pujales-Paradela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
| | - Laura Valencia
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - M Isabel Fernández
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
| | - Nicolas Lepareur
- Univ Rennes, Centre Eugène Marquis, Inrae, Inserm, Institut NUMECAN (Nutrition, Métabolismes et Cancer)─UMR_A 1341, UMR_S 1241, F-35000 Rennes, France
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Galicia, A Coruña, Spain
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5
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Radiometals—Chemistry and radiolabeling. Nucl Med Mol Imaging 2022. [DOI: 10.1016/b978-0-12-822960-6.00044-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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6
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Southcott L, Wang X, Choudhary N, Wharton L, Patrick BO, Yang H, Zarschler K, Kubeil M, Stephan H, Jaraquemada-Peláez MDG, Orvig C. H 2pyhox - Octadentate Bis(pyridyloxine). Inorg Chem 2021; 60:12186-12196. [PMID: 34310113 DOI: 10.1021/acs.inorgchem.1c01412] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new versatile chelating ligand for intermediate size and softness radiometals [64Cu]Cu2+ and [111In]In3+, H2pyhox, was synthesized by introducing pyridine as a new donor moiety to complement 8-hydroxyquinoline on an ethylenediamine backbone. The combination of pyridine and oxine as donor sets was explored through structural analysis, and crystals of the three metal complexes with Cu2+, La3+, and In3+ demonstrate how the ligand adapts to accommodate metal ions of different sizes and charge. Exhaustive in-batch UV solution studies characterized the protonation constants of the free ligand as well as the formation constants of the metal complexes with Cu2+, In3+, and La3+. Preliminary concentration-dependent radiolabeling studies with [111In]In3+ and [64Cu]Cu2+ show the robustness of H2pyhox to successfully coordinate both radiometals under mild conditions (<15 min, room temperature, pH 6). H2pyhox is the first oxinate ligand to successfully radiolabel [225Ac]Ac3+, albeit only at high concentrations (0.1-1 mM) with gentle heating to 37 °C. Whole serum, protein, and ligand challenge assays further demonstrate the kinetic inertness of the [111In]In3+ and [64Cu]Cu2+ radiometal-ligand complexes, confirming H2pyhox to be a promising versatile radiopharmaceutical chelator.
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Affiliation(s)
- Lily Southcott
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Xiaozhu Wang
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Neha Choudhary
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Luke Wharton
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.,Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Brian O Patrick
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hua Yang
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Kristof Zarschler
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Manja Kubeil
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Holger Stephan
- Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - María de Guadalupe Jaraquemada-Peláez
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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7
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Abstract
This introduction outlines general strategies for labeling proteins, with an emphasis on methods that are used primarily for labeling antibodies. It covers the specific site of modification, cross-linker options, types of labels, and postlabeling cleanup methodology, along with the advantages and disadvantages of each method. In general, polyclonal antibodies are more versatile and resistant to activity loss than are monoclonal antibodies. Greater care must be taken when labeling monoclonal antibodies to ensure a quality conjugate. The methods outlined here can be adapted for a variety of labels including multiple labels on the same immunoglobulin. The most important consideration when undertaking an antibody labeling experiment is to maintain the activity of the antibody. This is an empirical process and will often require additional experiments to optimize the label of a particular antibody. When successful, these reagents are very useful and adaptable biomolecules. This introduction provides the reader with methods and options for producing a variety of labeled immunological tools.
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8
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Yepremyan A, Mekhail MA, Niebuhr BP, Pota K, Sadagopan N, Schwartz TM, Green KN. Synthesis of 12-Membered Tetra-aza Macrocyclic Pyridinophanes Bearing Electron-Withdrawing Groups. J Org Chem 2020; 85:4988-4998. [PMID: 32208700 DOI: 10.1021/acs.joc.0c00188] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The number of substituted pyridine pyridinophanes found in the literature is limited due to challenges associated with 12-membered macrocycle and modified pyridine synthesis. Most notably, the electrophilic character at the 4-position of pyridine in pyridinophanes presents a unique challenge for introducing electrophilic chemical groups. Likewise, of the few reported, most substituted pyridine pyridinophanes in the literature are limited to electron-donating functionalities. Herein, new synthetic strategies for four new macrocycles bearing the electron-withdrawing groups CN, Cl, NO2, and CF3 are introduced. Potentiometric titrations were used to determine the protonation constants of the new pyridinophanes. Further, the influence of such modifications on the chemical behavior is predicted by comparing the potentiometric results to previously reported systems. X-ray diffraction analysis of the 4-Cl substituted species and its Cu(II) complex are also described to demonstrate the metal binding nature of these ligands. DFT analysis is used to support the experimental findings through energy calculations and ESP maps. These new molecules serve as a foundation to access a range of new pyridinophane small molecules and applications in future work.
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Affiliation(s)
- Akop Yepremyan
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Magy A Mekhail
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Brian P Niebuhr
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Nishanth Sadagopan
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Timothy M Schwartz
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
| | - Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 W. Bowie, Fort Worth, Texas 76129, United States
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9
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Mathieu P, Chalet M, Clain MM, Teulon L, Benoist E, Leygue N, Picard C, Boutry S, Laurent S, Stanicki D, Hénoumont C, Novio F, Lorenzo J, Montpeyó D, Ciuculescu-Pradines D, Amiens C. Surface engineering of silica nanoparticles with a gadolinium–PCTA complex for efficient T1-weighted MRI contrast agents. NEW J CHEM 2020. [DOI: 10.1039/d0nj04430j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Covalent grafting of diaqua Gd(iii)-complexes onto dense silica nanoparticles affords non-toxic contrast agents suitable for high field MRI pre-clinical studies.
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10
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Baranyai Z, Tircsó G, Rösch F. The Use of the Macrocyclic Chelator DOTA in Radiochemical Separations. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900706] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zsolt Baranyai
- Bracco Research Centre Bracco Imaging spa Via Ribes 5 10010 Colleretto Giacosa (TO) Italy
| | - Gyula Tircsó
- Department of Physical Chemistry Faculty of Science and Technology University of Debrecen Egyetem tér 1 Debrecen 4032 Hungary
| | - Frank Rösch
- Institute of Nuclear Chemistry Johannes Gutenberg‐University of Mainz Fritz‐Strassmann‐Weg 2 55128 Mainz Germany
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11
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Green KN, Pota K, Tircsó G, Gogolák RA, Kinsinger O, Davda C, Blain K, Brewer SM, Gonzalez P, Johnston HM, Akkaraju G. Dialing in on pharmacological features for a therapeutic antioxidant small molecule. Dalton Trans 2019; 48:12430-12439. [PMID: 31342985 PMCID: PMC6863055 DOI: 10.1039/c9dt01800j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The pyridinophane molecule L2 (3,6,9,15-tetraazabicyclo[9.3.1]penta-deca-1(15),11,13-trien-13-ol) has shown promise as a therapuetic for neurodegenerative diseases involving oxidative stress and metal ion misregulation. Protonation and metal binding stability constants with Mg2+, Ca2+, Cu2+, and Zn2+ ions were determined to further explore the therapeutic and pharmacological potential of this water soluble small molecule. These studies show that incorporation of an -OH group in position 4 of the pyridine ring decreases the pI values compared to cyclen and L1 (3,6,9,15-tetraazabicyclo[9.3.1]penta-deca-1(15),11,13-triene). Furthermore, this approach tunes the basicity of the tetra-aza macrocyclic ligand through the enhanced resonance stabilization of the -OH in position 4 and rigidity of the pyridine ring such that L2 has increased basicity compared to previously reported tetra-aza macrocycles. A metal binding preference for Cu2+, a redox cycling agent known to produce oxidative stress, indicates that this would be the in vivo metal target of L2. However, the binding constant of L2 with Cu2+ is moderated compared to cyclen due to the rigidity of the ligand and shows how ligand design can be used to tune metal selectivity. An IC50 = 298.0 μM in HT-22 neuronal cells was observed. Low metabolic liability was determined in both Phase I and II in vitro models. Throughout these studies other metal binding systems were used for comparison and as appropriate controls. The reactivity reported to date and pharmacological features described herein warrant further studies in vivo and the pursuit of L2 congeners using the knowledge that pyridine substitution in a pyridinophane can be used to tune the structure of the ligand and retain the positive therapeutic outcomes.
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Affiliation(s)
- Kayla N Green
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Kristof Pota
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4010, Hungary
| | - Réka Anna Gogolák
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, Debrecen, H-4010, Hungary
| | - Olivia Kinsinger
- Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
| | - Collin Davda
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Kimberly Blain
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA. and Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
| | - Samantha M Brewer
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Paulina Gonzalez
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Hannah M Johnston
- Department of Chemistry and Biochemistry, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA.
| | - Giridhar Akkaraju
- Department of Biology, Texas Christian University, 2950 S. Bowie, Fort Worth, TX 76129, USA
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12
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Egorova BV, Fedorova OA, Kalmykov SN. Cationic radionuclides and ligands for targeted therapeutic radiopharmaceuticals. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4890] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This review considers the already used and potential α- and β-emitting cationic radionuclides for targeted radionuclide therapy. Recent results of laboratory, preclinical and clinical applications of these radionuclides are discussed. As opposed to β-emitters, which are already used in nuclear medicine, α-emitters involved in targeted radiopharmaceuticals were subjected to clinical trials only recently and were found to be therapeutically effective. The review summarizes recent trends in the development of ligands as components of radiopharmaceuticals addressing specific features of short-lived cationic radionuclides applied in medicine. Despite a steadily growing number of chelating ligands, 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) and diethylenetriaminepentaacetic acid (DTPA) remain the most widely used agents in nuclear medicine. The drawbacks of these compounds restrict the application of radionuclides in medicine. Variations in the macrocycle size, the introduction and modification of substituents can significantly improve the chelating ability of ligands, enhance stability of radionuclide complexes with these ligands and eliminate the influence of ligands on the affinity of biological targeting vectors.
The bibliography includes 189 references.
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Leygue N, Enel M, Diallo A, Mestre-Voegtlé B, Galaup C, Picard C. Efficient Synthesis of a Family of Bifunctional Chelators Based on the PCTA[12] Macrocycle Suitable for Bioconjugation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900280] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Nadine Leygue
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Morgane Enel
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Abdel Diallo
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Béatrice Mestre-Voegtlé
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Chantal Galaup
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
| | - Claude Picard
- SPCMIB; UMR 5068 CNRS-Université Paul Sabatier-Toulouse III; 118 route de Narbonne 31062 Toulouse France
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Wahsner J, Gale EM, Rodríguez-Rodríguez A, Caravan P. Chemistry of MRI Contrast Agents: Current Challenges and New Frontiers. Chem Rev 2019; 119:957-1057. [PMID: 30350585 PMCID: PMC6516866 DOI: 10.1021/acs.chemrev.8b00363] [Citation(s) in RCA: 820] [Impact Index Per Article: 164.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Tens of millions of contrast-enhanced magnetic resonance imaging (MRI) exams are performed annually around the world. The contrast agents, which improve diagnostic accuracy, are almost exclusively small, hydrophilic gadolinium(III) based chelates. In recent years concerns have arisen surrounding the long-term safety of these compounds, and this has spurred research into alternatives. There has also been a push to develop new molecularly targeted contrast agents or agents that can sense pathological changes in the local environment. This comprehensive review describes the state of the art of clinically approved contrast agents, their mechanism of action, and factors influencing their safety. From there we describe different mechanisms of generating MR image contrast such as relaxation, chemical exchange saturation transfer, and direct detection and the types of molecules that are effective for these purposes. Next we describe efforts to make safer contrast agents either by increasing relaxivity, increasing resistance to metal ion release, or by moving to gadolinium(III)-free alternatives. Finally we survey approaches to make contrast agents more specific for pathology either by direct biochemical targeting or by the design of responsive or activatable contrast agents.
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Affiliation(s)
- Jessica Wahsner
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Eric M. Gale
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Aurora Rodríguez-Rodríguez
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Peter Caravan
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
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Clinical aspects of radiolabeled aptamers in diagnostic nuclear medicine: A new class of targeted radiopharmaceuticals. Bioorg Med Chem 2018; 27:2282-2291. [PMID: 30502114 DOI: 10.1016/j.bmc.2018.11.031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 11/16/2018] [Accepted: 11/21/2018] [Indexed: 12/31/2022]
Abstract
Targeted radiopharmaceuticals offer the possibility of improved imaging with reduced side effects. Up to now, a variety of biological receptors such as aptamers have been successfully radiolabeled and applied to diagnostic imaging of cancers. The concept of using radio-labeled aptamers for binding to their targets has stimulated an immense body of research in diagnostic nuclear medicine. These biological recognition elements are single-stranded oligonucleotides that interact with their target molecules with high affinity and specificity in unique three-dimensional structures. Because of their high affinity and specificity, the receptor-binding aptamers labeled with gamma emitters such as 99mTc, 64Cu, 111In, 18F and 67Ga can facilitate the visualization of receptor-expressing tissues noninvasively. Compared to the antibody-based radiopharmaceuticals, the radiolabeled aptamers provide a number of advantages for clinical diagnostics including high stability, low cost, and ease of production and modification, low immunogenicity and, especially, superior tissue penetration because of their smaller size. In this review, we present recent progresses and challenges in aptamer-based diagnostic radiopharmaceuticals and highlight some representative applications of aptamers in nuclear medicine.
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Abstract
Radiometals possess an exceptional breadth of decay properties and have been applied to medicine with great success for several decades. The majority of current clinical use involves diagnostic procedures, which use either positron-emission tomography (PET) or single-photon imaging to detect anatomic abnormalities that are difficult to visualize using conventional imaging techniques (e.g., MRI and X-ray). The potential of therapeutic radiometals has more recently been realized and relies on ionizing radiation to induce irreversible DNA damage, resulting in cell death. In both cases, radiopharmaceutical development has been largely geared toward the field of oncology; thus, selective tumor targeting is often essential for efficacious drug use. To this end, the rational design of four-component radiopharmaceuticals has become popularized. This Review introduces fundamental concepts of drug design and applications, with particular emphasis on bifunctional chelators (BFCs), which ensure secure consolidation of the radiometal and targeting vector and are integral for optimal drug performance. Also presented are detailed accounts of production, chelation chemistry, and biological use of selected main group and rare earth radiometals.
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Affiliation(s)
- Thomas I Kostelnik
- Medicinal Inorganic Chemistry Group, Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry , University of British Columbia , Vancouver , British Columbia V6T 1Z1 , Canada
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Wang X, Jaraquemada-Peláez MDG, Rodríguez-Rodríguez C, Cao Y, Buchwalder C, Choudhary N, Jermilova U, Ramogida CF, Saatchi K, Häfeli UO, Patrick BO, Orvig C. H4octox: Versatile Bimodal Octadentate Acyclic Chelating Ligand for Medicinal Inorganic Chemistry. J Am Chem Soc 2018; 140:15487-15500. [DOI: 10.1021/jacs.8b09964] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xiaozhu Wang
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - María de Guadalupe Jaraquemada-Peláez
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Cristina Rodríguez-Rodríguez
- Center for Comparative Medicine, 4145 Wesbrook Mall, Vancouver, British Columbia V6T 1W5, Canada
- Department of Physics and Astronomy, University of British Columbia, 6224 Agronomy Road, Vancouver, British Columbia V6T 1Z1, Canada
| | - Yang Cao
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Christian Buchwalder
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Neha Choudhary
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Una Jermilova
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - Caterina F. Ramogida
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada
| | - Katayoun Saatchi
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Urs O. Häfeli
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Brian O. Patrick
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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Le Fur M, Molnár E, Beyler M, Fougère O, Esteban-Gómez D, Rousseaux O, Tripier R, Tircsó G, Platas-Iglesias C. Expanding the Family of Pyclen-Based Ligands Bearing Pendant Picolinate Arms for Lanthanide Complexation. Inorg Chem 2018; 57:6932-6945. [DOI: 10.1021/acs.inorgchem.8b00598] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Mariane Le Fur
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Enikő Molnár
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Maryline Beyler
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Olivier Fougère
- Groupe Guerbet,
Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Olivier Rousseaux
- Groupe Guerbet,
Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, IBSAM, UFR des Sciences et Techniques, 6 avenue Victor le Gorgeu, C.S. 93837, 29238 Brest Cedex 3, France
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigaciones Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
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Läppchen T, Kiefer Y, Holland JP, Bartholomä MD. In vitro and in vivo evaluation of the bifunctional chelator NODIA-Me in combination with a prostate-specific membrane antigen targeting vector. Nucl Med Biol 2018; 60:45-54. [DOI: 10.1016/j.nucmedbio.2018.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 02/14/2018] [Accepted: 03/07/2018] [Indexed: 01/21/2023]
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Enel M, Leygue N, Saffon N, Galaup C, Picard C. Facile Access to the 12-Membered Macrocyclic Ligand PCTA and Its Derivatives with Carboxylate, Amide, and Phosphinate Ligating Functionalities. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Morgane Enel
- CNRS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); UMR-5068; 118 Route de Narbonne 31062 Toulouse cedex 9 France
- Université de Toulouse; UPS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Nadine Leygue
- CNRS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); UMR-5068; 118 Route de Narbonne 31062 Toulouse cedex 9 France
- Université de Toulouse; UPS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Nathalie Saffon
- Institut de Chimie de Toulouse (FR 2599); 118 Route de Narbonne 31062 Toulouse cedex 9 France
| | - Chantal Galaup
- CNRS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); UMR-5068; 118 Route de Narbonne 31062 Toulouse cedex 9 France
- Université de Toulouse; UPS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); 118 route de Narbonne 31062 Toulouse cedex 9 France
| | - Claude Picard
- CNRS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); UMR-5068; 118 Route de Narbonne 31062 Toulouse cedex 9 France
- Université de Toulouse; UPS; Laboratoire de Synthèse et Physico-Chimie de Molécules d'Intérêt Biologique (SPCMIB); 118 route de Narbonne 31062 Toulouse cedex 9 France
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Schmidtke A, Läppchen T, Weinmann C, Bier-Schorr L, Keller M, Kiefer Y, Holland JP, Bartholomä MD. Gallium Complexation, Stability, and Bioconjugation of 1,4,7-Triazacyclononane Derived Chelators with Azaheterocyclic Arms. Inorg Chem 2017; 56:9097-9110. [DOI: 10.1021/acs.inorgchem.7b01129] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Alexander Schmidtke
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
| | - Tilman Läppchen
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
- Department of Nuclear
Medicine, Inselspital, Bern University Hospital and University of Bern, Freiburgstrasse, CH-3010 Bern, Switzerland
| | - Christian Weinmann
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
| | - Lorenz Bier-Schorr
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
| | - Manfred Keller
- Department of Chemistry, University of Freiburg, D-79104, Freiburg, Germany
| | - Yvonne Kiefer
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
| | - Jason P. Holland
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
- Department of Chemistry, University of Zürich, Winterthurerstrasse 190, CH-8057, Zürich, Switzerland
| | - Mark D. Bartholomä
- Department of Nuclear
Medicine, Medical Center − University of Freiburg, Faculty
of Medicine, University of Freiburg, Hugstetterstrasse 55, D-79106, Freiburg, Germany
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Le Fur M, Beyler M, Lepareur N, Fougère O, Platas-Iglesias C, Rousseaux O, Tripier R. Pyclen Tri-n-butylphosphonate Ester as Potential Chelator for Targeted Radiotherapy: From Yttrium(III) Complexation to 90Y Radiolabeling. Inorg Chem 2016; 55:8003-12. [PMID: 27486673 DOI: 10.1021/acs.inorgchem.6b01135] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Mariane Le Fur
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 Avenue Victor le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Maryline Beyler
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 Avenue Victor le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
| | - Nicolas Lepareur
- Département de Médecine Nucléaire, Centre Eugène Marquis, INSERM U991, Avenue de la Bataille Flandres-Dunkerque,
CS 44229, 35042 Rennes Cedex, France
| | - Olivier Fougère
- Guerbet Group, Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Carlos Platas-Iglesias
- 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
| | - Olivier Rousseaux
- Guerbet Group, Centre de Recherche d’Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Raphaël Tripier
- Université de Bretagne Occidentale, UMR-CNRS 6521, UFR des Sciences et Techniques, 6 Avenue Victor le Gorgeu, CS 93837, 29238 Brest Cedex 3, France
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A systematic evaluation of the potential of PCTA-NCS ligand as a bifunctional chelating agent for design of 177Lu radiopharmaceuticals. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4281-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Poty S, Désogère P, Šimeček J, Bernhard C, Goncalves V, Goze C, Boschetti F, Notni J, Wester HJ, Denat F. MA-NOTMP: A Triazacyclononane Trimethylphosphinate Based Bifunctional Chelator for Gallium Radiolabelling of Biomolecules. ChemMedChem 2015; 10:1475-9. [DOI: 10.1002/cmdc.201500198] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Indexed: 12/20/2022]
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Baranyai Z, Reich D, Vágner A, Weineisen M, Tóth I, Wester HJ, Notni J. A shortcut to high-affinity Ga-68 and Cu-64 radiopharmaceuticals: one-pot click chemistry trimerisation on the TRAP platform. Dalton Trans 2015; 44:11137-46. [PMID: 25999035 DOI: 10.1039/c5dt00576k] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Due to its 3 carbonic acid groups being available for bioconjugation, the TRAP chelator (1,4,7-triazacyclononane-1,4,7-tris(methylene(2-carboxyethylphosphinic acid))) is chosen for the synthesis of trimeric bioconjugates for radiolabelling. We optimized a protocol for bio-orthogonal TRAP conjugation via Cu(I)-catalyzed Huisgen-cycloaddition of terminal azides and alkynes (CuAAC), including a detailed investigation of kinetic properties of Cu(II)-TRAP complexes. TRAP building blocks for CuAAC, TRAP(alkyne)3 and TRAP(azide)3 were obtained by amide coupling of propargylamine/3-azidopropyl-1-amine, respectively. For Cu(II) complexes of neat and triply amide-functionalized TRAP, the equilibrium properties as well as pseudo-first-order Cu(II)-transchelation, using 10 to 30 eq. of NOTA and EDTA, were studied by UV-spectrophotometry. Dissociation of any Cu(II)-TRAP species was found to be independent on the nature or excess of a competing chelator, confirming a proton-driven two-step mechanism. The respective thermodynamic stability constants (log K(ML): 19.1 and 17.6) and dissociation rates (k: 38 × 10(-6) and 7 × 10(-6) s(-1), 298 K, pH 4) show that the Cu(II) complex of the TRAP-conjugate possesses lower thermodynamic stability but higher kinetic inertness. At pH 2-3, its demetallation with NOTA was complete within several hours/days at room temperature, respectively, enabling facile Cu(II) removal after click coupling by direct addition of NOTA trihydrochloride to the CuAAC reaction mixture. Notwithstanding this, an extrapolated dissociation half life of >100 h at 37 °C and pH 7 confirms the suitability of TRAP-bioconjugates for application in Cu-64 PET (cf. t(1/2)(Cu-64) = 12.7 h). To showcase advantages of the method, TRAP(DUPA-Pep)3, a trimer of the PSMA inhibitor DUPA-Pep, was synthesized using 1 eq. TRAP(alkyne)3, 3.3 eq. DUPA-Pep-azide, 10 eq. Na ascorbate, and 1.2 eq. Cu(II)-acetate. Its PSMA affinity (IC50), determined by the competition assay on LNCaP cells, was 18-times higher than that of the corresponding DOTAGA monomer (IC50: 2 ± 0.1 vs. 36 ± 4 nM), resulting in markedly improved contrast in Ga-68-PET imaging. In conclusion, the kinetic inertness profile of Cu(II)-TRAP conjugates allows for simple Cu(II) removal after click functionalisation by means of transchelation, but also confirms their suitability for Cu-64-PET as demonstrated previously (Dalton Trans., 2012, 41, 13803).
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Affiliation(s)
- Zsolt Baranyai
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, Debrecen, H-4032, Hungary
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Novy Z, Laznickova A, Mandikova J, Barta P, Laznicek M, Trejtnar F. The effect of chelator type onin vitroreceptor binding and stability in177Lu-labeled cetuximab and panitumumab. J Labelled Comp Radiopharm 2014; 57:448-52. [DOI: 10.1002/jlcr.3204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 02/01/2014] [Accepted: 04/11/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Zbynek Novy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
- Laboratory of Experimental Medicine, Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry; Palacky University Olomouc; Czech Republic
| | - Alice Laznickova
- Department of Biophysics and Physical Chemistry, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
| | - Jana Mandikova
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
| | - Pavel Barta
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
| | - Milan Laznicek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
| | - Frantisek Trejtnar
- Department of Pharmacology and Toxicology, Faculty of Pharmacy in Hradec Kralove; Charles University in Prague; Czech Republic
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Notni J, Šimeček J, Wester HJ. Phosphinic Acid Functionalized Polyazacycloalkane Chelators for Radiodiagnostics and Radiotherapeutics: Unique Characteristics and Applications. ChemMedChem 2014; 9:1107-15. [DOI: 10.1002/cmdc.201400055] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Indexed: 11/11/2022]
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Šimeček J, Zemek O, Hermann P, Notni J, Wester HJ. Tailored Gallium(III) Chelator NOPO: Synthesis, Characterization, Bioconjugation, and Application in Preclinical Ga-68-PET Imaging. Mol Pharm 2013; 11:3893-903. [DOI: 10.1021/mp400642s] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jakub Šimeček
- Lehrstuhl
für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meissner-Str. 3, D-85748 Garching, Germany
| | - Ondřej Zemek
- Department
of Inorganic Chemistry, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Petr Hermann
- Department
of Inorganic Chemistry, Charles University in Prague, Hlavova 2030, 12840 Prague 2, Czech Republic
| | - Johannes Notni
- Lehrstuhl
für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meissner-Str. 3, D-85748 Garching, Germany
| | - Hans-Jürgen Wester
- Lehrstuhl
für Pharmazeutische Radiochemie, Technische Universität München, Walther-Meissner-Str. 3, D-85748 Garching, Germany
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30
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Boros E, Rybak-Akimova E, Holland JP, Rietz T, Rotile N, Blasi F, Day H, Latifi R, Caravan P. Pycup--a bifunctional, cage-like ligand for (64)Cu radiolabeling. Mol Pharm 2013; 11:617-29. [PMID: 24294970 DOI: 10.1021/mp400686z] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In developing targeted probes for positron emission tomography (PET) based on (64)Cu, stable complexation of the radiometal is key, and a flexible handle for bioconjugation is highly advantageous. Here, we present the synthesis and characterization of the chelator pycup and four derivatives. Pycup is a cross-bridged cyclam derivative with a pyridyl donor atom integrated into the cross-bridge resulting in a pentadentate ligand. The pycup platform provides kinetic inertness toward (64)Cu dechelation and offers versatile bioconjugation chemistry. We varied the number and type of additional donor atoms by alkylation of the remaining two secondary amines, providing three model ligands, pycup2A, pycup1A1Bn, and pycup2Bn, in 3-4 synthetic steps from cyclam. All model copper complexes displayed very slow decomplexation in 5 M HCl and 90 °C (t1/2: 1.5 h for pycup1A1Bn, 2.7 h for pycup2A, 20.3 h for pycup2Bn). The single crystal crystal X-ray structure of the [Cu(pycup2Bn)](2+) complex showed that the copper was coordinated in a trigonal, bipyramidal manner. The corresponding radiochemical complexes were at least 94% stable in rat plasma after 24 h. Biodistribution studies conducted in Balb/c mice at 2 h postinjection of (64)Cu labeled pycup2A revealed low residual activity in kidney, liver, and blood pool with predominantly renal clearance observed. Pycup2A was readily conjugated to a fibrin-targeted peptide and labeled with (64)Cu for successful PET imaging of arterial thrombosis in a rat model, demonstrating the utility of our new chelator in vivo.
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Affiliation(s)
- Eszter Boros
- The Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School , 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States
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31
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Chakravarty R, Chakraborty S, Dash A. A systematic comparative evaluation of90Y-labeled bifunctional chelators for their use in targeted therapy. J Labelled Comp Radiopharm 2013; 57:65-74. [DOI: 10.1002/jlcr.3140] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Rubel Chakravarty
- Isotope Applications and Radiopharmaceuticals Division; Bhabha Atomic Research Centre; Trombay Mumbai 400 085 India
| | - Sudipta Chakraborty
- Isotope Applications and Radiopharmaceuticals Division; Bhabha Atomic Research Centre; Trombay Mumbai 400 085 India
| | - Ashutosh Dash
- Isotope Applications and Radiopharmaceuticals Division; Bhabha Atomic Research Centre; Trombay Mumbai 400 085 India
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32
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Ramogida CF, Orvig C. Tumour targeting with radiometals for diagnosis and therapy. Chem Commun (Camb) 2013; 49:4720-39. [PMID: 23599005 DOI: 10.1039/c3cc41554f] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Use of radiometals in nuclear oncology is a rapidly growing field and encompasses a broad spectrum of radiotracers for imaging via PET (positron emission tomography) or SPECT (single-photon emission computed tomography) and therapy via α, β(-), or Auger electron emission. This feature article opens with a brief introduction to the imaging and therapy modalities exploited in nuclear medicine, followed by a discussion of the multi-component strategy used in radiopharmaceutical development, known as the bifunctional chelate (BFC) method. The modular assembly is dissected into its individual components and each is discussed separately. The concepts and knowledge unique to metal-based designs are outlined, giving insight into how these radiopharmaceuticals are evaluated for use in vivo. Imaging nuclides (64)Cu, (68)Ga, (86)Y, (89)Zr, and (111)In, and therapeutic nuclides (90)Y, (177)Lu, (225)Ac, (213)Bi, (188)Re, and (212)Pb will be the focus herein. Finally, key examples have been extracted from the literature to give the reader a sense of breadth of the field.
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Affiliation(s)
- Caterina F Ramogida
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
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33
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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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34
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Detailed evaluation on the effect of metal ion impurities on complexation of generator eluted 68Ga with different bifunctional chelators. Nucl Med Biol 2013; 40:197-205. [DOI: 10.1016/j.nucmedbio.2012.11.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 10/29/2012] [Accepted: 11/01/2012] [Indexed: 11/19/2022]
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35
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Deslandes S, Galaup C, Poole R, Mestre-Voegtlé B, Soldevila S, Leygue N, Bazin H, Lamarque L, Picard C. Synthesis and optical properties of macrocyclic lanthanide(III) chelates as new reagents for luminescent biolabeling. Org Biomol Chem 2012; 10:8509-23. [PMID: 23011114 DOI: 10.1039/c2ob26311d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The convenient and efficient synthesis of two macrocyclic ligands (15- and 18-membered) based on a dipyrido-6,7,8,9-tetrahydrophenazine (dpqc) or 2,2':6',2''-terpyridine (tpy) heterocycle and a DTTA (diethylenetriaminetriacetic acid) skeleton is described. In these ligands the DTTA skeleton contains an additional extracyclic functionality (NH(2) group) suitable for covalent attachment to bioactive molecules. These octa- and nonadentate ligands form very stable and luminescent neutral lanthanide complexes in aqueous solutions at physiological pH. The corresponding Eu(III) and Tb(III) complexes are characterized by a maximum absorption wavelength compatible with nitrogen laser excitation (337 nm) and attractive lifetimes and quantum yields. Further introduction of a maleimide bioconjugatable handle in the Eu(III) complexes was investigated and a valuable luminescence brightness above 1500 dm(3) mol(-1) cm(-1) at 337 nm was obtained with the corresponding Eu(III) tpy-derivative. Finally, these two luminescent chelates were grafted onto thiol residues of a model antibody (Mab GSS11) without loss of their luminescent properties.
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36
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RGD conjugates of the H2dedpa scaffold: synthesis, labeling and imaging with 68Ga. Nucl Med Biol 2012; 39:785-94. [DOI: 10.1016/j.nucmedbio.2012.01.003] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 12/29/2011] [Accepted: 01/10/2012] [Indexed: 11/20/2022]
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37
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Webber BC, Woods M. Structural analysis of isomeric europium(III) chelates of NB-DOTMA. Inorg Chem 2012; 51:8576-82. [PMID: 22809081 DOI: 10.1021/ic3011597] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Water exchange in lanthanide(III) chelates is a key parameter in developing more effective MRI contrast agents. Our own efforts to optimize water exchange have focused on isolating single coordination geometries of LnDOTA-type chelates (DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate.) This isolation may be achieved by appropriately substituting the ligand framework to freeze-out the conformational exchange processes that interconvert coordination geometries. When a single nitrobenzyl substituent is used to "lock" the conformation of the macrocyclic ring, two regioisomeric chelates may be produced; the substituent may be alternatively located on the corner or the side of the ring. Here, we unambiguously demonstrate this regioisomerism by examining the COSY spectra of some conformationally locked Eu(3+) chelates. This exercise also demonstrated that diastereoisomeric chelates arising from racemization of chiral centers during the ligand synthesis, recently discounted as the origin of multiple isomeric chelates, can be produced and isolated. Furthermore, these COSY data revealed several through space NOE correlations that afford a great deal of information about the conformation of the nitrobenzyl substituent. In those isomers in which the substituent is located on the corner of the ring, the nitrobenzyl group is oriented approximately perpendicular to the plane of the macrocycle pointing upward and away from the chelate. In contrast, when the substituent is located on the side of the ring, the nitrobenzyl group is oriented approximately in plane with the macrocycle, pointing along the side of the chelate. Because the main purpose of the nitro group is to facilitate chemical modification and conjugation to biologically relevant molecules, these differences may have important consequences. Specifically, it seems likely that the same chelate may interact very differently with biological systems and molecules depending upon the regioisomer and therefore the orientation of the chelate relative to the biomolecule.
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Affiliation(s)
- Benjamin C Webber
- Department of Chemistry, Portland State University, 1719 SW 10th Ave., Portland, Oregon 97201, United States
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38
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Bartholomä MD. Recent developments in the design of bifunctional chelators for metal-based radiopharmaceuticals used in Positron Emission Tomography. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.01.061] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Ferreira CL, Holley I, Bensimon C, Jurek P, Kiefer GE. Pharmacokinetic Modulation of Radiolabeled Chelates Facilitated by Phosphonate Ester Coordinating Groups. Mol Pharm 2012; 9:2180-6. [DOI: 10.1021/mp300024c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cara L. Ferreira
- Nordion, 4004 Wesbrook
Mall, Vancouver, British Columbia, Canada V6T 2A3
| | - Ian Holley
- Nordion, 4004 Wesbrook
Mall, Vancouver, British Columbia, Canada V6T 2A3
| | - Corinne Bensimon
- Nordion, 4004 Wesbrook
Mall, Vancouver, British Columbia, Canada V6T 2A3
| | - Paul Jurek
- Macrocyclics, 1309 Record Crossing, Dallas,
Texas 75235, USA
| | - Garry E. Kiefer
- Macrocyclics, 1309 Record Crossing, Dallas,
Texas 75235, USA
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40
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Frullano L, Caravan P. Strategies for the preparation of bifunctional gadolinium(III) chelators. Curr Org Synth 2011; 8:535-565. [PMID: 22375102 DOI: 10.2174/157017911796117250] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The development of gadolinium chelators that can be easily and readily linked to various substrates is of primary importance for the development high relaxation efficiency and/or targeted magnetic resonance imaging (MRI) contrast agents. Over the last 25 years a large number of bifunctional chelators have been prepared. For the most part, these compounds are based on ligands that are already used in clinically approved contrast agents. More recently, new bifunctional chelators have been reported based on complexes that show a more potent relaxation effect, faster complexation kinetics and in some cases simpler synthetic procedures. This review provides an overview of the synthetic strategies used for the preparation of bifunctional chelators for MRI applications.
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Affiliation(s)
- Luca Frullano
- Case Western Reserve University. 11100 Euclid Ave Cleveland, OH 44106
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41
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Lattuada L, Barge A, Cravotto G, Giovenzana GB, Tei L. The synthesis and application of polyamino polycarboxylic bifunctional chelating agents. Chem Soc Rev 2011; 40:3019-49. [DOI: 10.1039/c0cs00199f] [Citation(s) in RCA: 139] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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42
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Roca-Sabio A, Mato-Iglesias M, Esteban-Gómez D, de Blas A, Rodríguez-Blas T, Platas-Iglesias C. The effect of ring size variation on the structure and stability of lanthanide(III) complexes with crown ethers containing picolinate pendants. Dalton Trans 2010; 40:384-92. [PMID: 21116555 DOI: 10.1039/c0dt00746c] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordination properties of the macrocyclic receptor N,N'-bis[(6-carboxy-2-pyridyl)methylene]-1,10-diaza-15-crown-5 (H(2)bp15c5) towards the lanthanide ions are reported. Thermodynamic stability constants were determined by pH-potentiometric titration at 25 °C in 0.1 M KCl. A smooth decrease in complex stability is observed upon decreasing the ionic radius of the Ln(III) ion from La [log K(LaL) = 12.52(2)] to Lu [log K(LuL) = 10.03(6)]. Luminescence lifetime measurements recorded on solutions of the Eu(III) and Tb(III) complexes confirm the absence of inner-sphere water molecules in these complexes. (1)H and (13)C NMR spectra of the complexes formed with the diamagnetic La(III) metal ion were obtained in D(2)O solution and assigned with the aid of HSQC and HMBC 2D heteronuclear experiments, as well as standard 2D homonuclear COSY and NOESY spectra. The (1)H NMR spectra of the paramagnetic Ce(III), Eu(III) and Yb(III) complex suggest nonadentate binding of the ligand to the metal ion. The syn conformation of the ligand in [Ln(bp15c5)](+) complexes implies the occurrence of two helicities, one associated with the layout of the picolinate pendant arms (absolute configuration Δ or Λ), and the other to the five five-membered chelate rings formed by the binding of the crown moiety (absolute configuration δ or λ). A detailed conformational analysis performed with the aid of DFT calculations (B3LYP model) indicates that the complexes adopt a Λ(λδ)(δδλ) [or Δ(δλ)(λλδ)] conformation in aqueous solution. Our calculations show that the interaction between the Ln(III) ion and several donor atoms of the crown moiety is weakened as the ionic radius of the metal ion decreases, in line with the decrease of complex stability observed on proceeding to the right across the lanthanide series.
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Affiliation(s)
- Adrián Roca-Sabio
- Departamento de Química Fundamental, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A, Coruña, Spain
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43
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Synthesis, structure and superoxide dismutase activity of a novel tetranuclear copper(II) complex Na2[Cu4Na2(TACNTA)4(H2O)6]·(H2O)26. INORG CHEM COMMUN 2010. [DOI: 10.1016/j.inoche.2010.07.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Bechara G, Leygue N, Galaup C, Mestre-Voegtlé B, Picard C. Polyazamacrocycles based on a tetraaminoacetate moiety and a (poly)pyridine intracyclic unit: direct synthesis and application to the photosensitization of Eu(III) and Tb(III) ions in aqueous solutions. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.052] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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45
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Terreno E, Castelli DD, Viale A, Aime S. Challenges for molecular magnetic resonance imaging. Chem Rev 2010; 110:3019-42. [PMID: 20415475 DOI: 10.1021/cr100025t] [Citation(s) in RCA: 566] [Impact Index Per Article: 40.4] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Enzo Terreno
- Department of Chemistry IFM and Molecular Imaging Center, University of Torino, Torino, Italy
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46
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Ferreira CL, Lamsa E, Woods M, Duan Y, Fernando P, Bensimon C, Kordos M, Guenther K, Jurek P, Kiefer GE. Evaluation of Bifunctional Chelates for the Development of Gallium-Based Radiopharmaceuticals. Bioconjug Chem 2010; 21:531-6. [DOI: 10.1021/bc900443a] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Cara L. Ferreira
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Eric Lamsa
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Michael Woods
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Yin Duan
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Pasan Fernando
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Corinne Bensimon
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Myra Kordos
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Katharina Guenther
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Paul Jurek
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
| | - Garry E. Kiefer
- MDS Nordion, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3, Ottawa Heart Institute, Ottawa, Ontario, Canada, MDS Nordion, Kanata, Ontario, Canada, and Macrocyclics, Dallas, Texas
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47
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Rojas-Quijano FA, Benyó ET, Tircsó G, Kálmán FK, Baranyai Z, Aime S, Sherry AD, Kovács Z. Lanthanide(III) complexes of tris(amide) PCTA derivatives as potential bimodal magnetic resonance and optical imaging agents. Chemistry 2009; 15:13188-200. [PMID: 19882595 PMCID: PMC2907668 DOI: 10.1002/chem.200901095] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Lanthanide complexes of two tris(amide) derivatives of PCTA were synthesized and characterized. The relaxometric and luminescence properties of their lanthanide complexes were investigated as bimodal magnetic resonance (MR) and optical imaging agents. Luminescence studies show that one of the Tb(III) complexes dimerizes in solution at low millimolar concentrations, whereas the other may have a higher than expected coordination number in solution. The corresponding Gd(III) complexes display unusually high T(1) relaxivities and enhanced kinetic inertness compared to GdPCTA. These features suggest that these new chelates may be suitable for in vivo applications. The fast water-exchange rates observed for these complexes make them unsuitable as paramagnetic chemical exchange saturation transfer (PARACEST) agents.
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Affiliation(s)
- Federico A. Rojas-Quijano
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 (USA)
| | - Enikő Tircsóné Benyó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, 4010, Debrecen, Egyetem tér 1. (Hungary)
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry, University of Debrecen, 4010, Debrecen, Egyetem tér 1. (Hungary)
| | - Ferenc K. Kálmán
- Department of Chemistry IFM & Molecular Imaging Center, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino (Italy)
| | - Zsolt Baranyai
- Department of Inorganic and Analytical Chemistry, University of Debrecen, 4010, Debrecen, Egyetem tér 1. (Hungary)
- Department of Chemistry IFM & Molecular Imaging Center, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino (Italy)
| | - Silvio Aime
- Department of Chemistry IFM & Molecular Imaging Center, Università degli Studi di Torino, Via P. Giuria 7, 10125 Torino (Italy)
| | - A. Dean Sherry
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 (USA)
| | - Zoltán Kovács
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 (USA)
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