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Merdzo I, Travagin F, Boccalon M, Alessio E, Lattuada L, Baranyai Z, Giovenzana GB. TRASUTA: The Effect of the Structural Rigidity of a Mesocyclic AAZTA-like Chelating Agent on the Thermodynamic, Kinetic, and Structural Properties of Some Divalent Metal and Ga 3+ Complexes. Inorg Chem 2024; 63:12525-12537. [PMID: 38905138 DOI: 10.1021/acs.inorgchem.4c01413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/23/2024]
Abstract
Mesocyclic chelating agents such as AAZTA and its derivatives have been recently reported to overcome the relatively low thermodynamic stability of metal complexes of acyclic chelating agents and the slow complexation kinetics of macrocyclic chelating agents. This work reports the preparation of a spirobicyclic hexadentate AAZTA-like chelating agent (TRASUTA) and the investigation of the thermodynamic, kinetic, and structural properties of the corresponding chelates with the PET-relevant Ga3+ and selected metal ions. A combination of analytical techniques allowed identification of a coordination isomerization process, involving the coordinating side arms and the inversion of a nitrogen atom and leading to lower thermodynamic and kinetic inertness with respect to mononuclear mesocyclic analogues. The bicyclic system of TRASUTA retains significant dynamics despite the conformational constraint imposed by the spiro-fusion, resulting in a lower stability of the corresponding metal chelates.
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Affiliation(s)
- Ileana Merdzo
- Bracco Imaging Spa, AREA Science Park, ed. Q─S.S. 14 Km 163,5, Basovizza 34149, (TS), Italy
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, Trieste 34127, (TS), Italy
| | - Fabio Travagin
- Dipartimento di Scienze del Farmaco, Università Degli Studi Del Piemonte Orientale, Largo Donegani 2/3, Novara 28100, (NO), Italy
| | - Mariangela Boccalon
- Bracco Imaging Spa, AREA Science Park, ed. Q─S.S. 14 Km 163,5, Basovizza 34149, (TS), Italy
| | - Enzo Alessio
- Department of Chemical and Pharmaceutical Sciences, University of Trieste, Via L. Giorgieri 1, Trieste 34127, (TS), Italy
| | - Luciano Lattuada
- Bracco Imaging Spa, Bracco Research Centre, Via Ribes 5, Colleretto Giacosa 10010, (TO), Italy
| | - Zsolt Baranyai
- Bracco Imaging Spa, AREA Science Park, ed. Q─S.S. 14 Km 163,5, Basovizza 34149, (TS), Italy
| | - Giovanni B Giovenzana
- Dipartimento di Scienze del Farmaco, Università Degli Studi Del Piemonte Orientale, Largo Donegani 2/3, Novara 28100, (NO), Italy
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2
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Martinelli J, Romano E, Laczovics A, Horváth D, Grattoni E, Baranyai Z, Tei L. Improving the Stability and Kinetic Inertness of Mn(II) Complexes by Increasing the Bridge Length in Bicyclic CDTA-Like Ligands. Chemistry 2024; 30:e202400570. [PMID: 38597334 DOI: 10.1002/chem.202400570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 04/08/2024] [Accepted: 04/10/2024] [Indexed: 04/11/2024]
Abstract
Kinetic inertness of Mn(II)-based MRI contrast agents can be improved by increasing the rigidity of the polydentate ligand that tightly coordinate the metal ion. Taking inspiration from the remarkable increase in kinetic inertness of [Mn(CDTA)]2- compared to [Mn(EDTA)]2- due to the cyclohexyl backbone rigidity, we devised that bicyclic ligands would further improve the kinetic inertness of the Mn(II) complexes. The length of the alkyl bridge on the cyclohexane ring was varied from methylene (BCH-DTA), ethylene (BCO-DTA) to propylene (BCN-DTA) to evaluate the influence of the different trans-diaminotetraacetate ligands on relaxometric, thermodynamic and kinetic properties of the Mn(II) complexes. 1H and 17O NMR relaxometric studies showed a slight increase in relaxivity and a faster water exchange rate in these Mn(II)-complexes with respect to [Mn(CDTA)]2-. Solution studies revealed that the conditional stability (pMn) and dissociation half-life (t1/2) at pH 7.4 follow the order [Mn(BCH-DTA)]2-<[Mn(BCO-DTA)]2-<[Mn(BCN-DTA)]2- highlighting the effect of the bridge length on the overall stability of the Mn(II) complexes. Remarkably, [Mn(BCN-DTA)]2- shows an improved pMn value and a 7-times higher kinetic inertness than [Mn(CDTA)]2-. NMR studies on the Zn(II) analogues confirm the rigidity of the bicyclic complexes with an isomerization process at >313 K for the smaller bridged complex [Zn(BCH-DTA)]2-.
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Affiliation(s)
- Jonathan Martinelli
- Department of Science and Technological Innovation, University of Piemonte Orientale, Viale Teresa Michel 11, 15121, Alessandria, Italy
- Department of Health Sciences (DISSAL), Università di Genova, Via A. Pastore 1, 16132, Genova, Italy
- Nuclear Medicine Unit, IRCCS Ospedale Policlinico San Martino, Largo R. Benzi 10, 16132, Genova, Italy
| | - Elisabetta Romano
- Department of Science and Technological Innovation, University of Piemonte Orientale, Viale Teresa Michel 11, 15121, Alessandria, Italy
| | - Attila Laczovics
- Faculty of Medicine, Institute of Medical Imaging, University of Debrecen, Nagyerdei körút 98, 4032, Debrecen, Hungary
| | - David Horváth
- Faculty of Science and Technology, Department of Physical Chemistry, Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, 4010, Debrecen, Hungary
- Bracco Imaging SpA, CRB Trieste, AREA Science Park, 34149, Basovizza (TS), Italy
| | - Elena Grattoni
- Bracco Imaging SpA, CRB Trieste, AREA Science Park, 34149, Basovizza (TS), Italy
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Trieste, Piazzale Europa 1, 34127, Trieste (TS), Italy
| | - Zsolt Baranyai
- Bracco Imaging SpA, CRB Trieste, AREA Science Park, 34149, Basovizza (TS), Italy
- Faculty of Science and Technology, Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, 4010, Debrecen, Hungary
| | - Lorenzo Tei
- Department of Science and Technological Innovation, University of Piemonte Orientale, Viale Teresa Michel 11, 15121, Alessandria, Italy
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Fersing C, Masurier N, Rubira L, Deshayes E, Lisowski V. AAZTA-Derived Chelators for the Design of Innovative Radiopharmaceuticals with Theranostic Applications. Pharmaceuticals (Basel) 2022; 15:234. [PMID: 35215346 PMCID: PMC8879111 DOI: 10.3390/ph15020234] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/12/2022] [Accepted: 02/14/2022] [Indexed: 02/06/2023] Open
Abstract
With the development of 68Ga and 177Lu radiochemistry, theranostic approaches in modern nuclear medicine enabling patient-centered personalized medicine applications have been growing in the last decade. In conjunction with the search for new relevant molecular targets, the design of innovative chelating agents to easily form stable complexes with various radiometals for theranostic applications has gained evident momentum. Initially conceived for magnetic resonance imaging applications, the chelating agent AAZTA features a mesocyclic seven-membered diazepane ring, conferring some of the properties of both acyclic and macrocyclic chelating agents. Described in the early 2000s, AAZTA and its derivatives exhibited interesting properties once complexed with metals and radiometals, combining a fast kinetic of formation with a slow kinetic of dissociation. Importantly, the extremely short coordination reaction times allowed by AAZTA derivatives were particularly suitable for short half-life radioelements (i.e., 68Ga). In view of these particular characteristics, the scope of this review is to provide a survey on the design, synthesis, and applications in the nuclear medicine/radiopharmacy field of AAZTA-derived chelators.
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Affiliation(s)
- Cyril Fersing
- Nuclear Medicine Department, Institut Régional du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (L.R.); (E.D.)
- IBMM, University Montpellier, CNRS, ENSCM, 34293 Montpellier, France; (N.M.); (V.L.)
| | - Nicolas Masurier
- IBMM, University Montpellier, CNRS, ENSCM, 34293 Montpellier, France; (N.M.); (V.L.)
| | - Léa Rubira
- Nuclear Medicine Department, Institut Régional du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (L.R.); (E.D.)
| | - Emmanuel Deshayes
- Nuclear Medicine Department, Institut Régional du Cancer de Montpellier (ICM), University Montpellier, 34298 Montpellier, France; (L.R.); (E.D.)
- Institut de Recherche en Cancérologie de Montpellier (IRCM), INSERM U1194, Institut Régional du Cancer de Montpellier (ICM), University of Montpellier, 34298 Montpellier, France
| | - Vincent Lisowski
- IBMM, University Montpellier, CNRS, ENSCM, 34293 Montpellier, France; (N.M.); (V.L.)
- Department of Pharmacy, Lapeyronie Hospital, CHU Montpellier, 191 Av. du Doyen Gaston Giraud, 34295 Montpellier, France
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4
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Martinelli J, Boccalon M, Horvath D, Esteban-Gomez D, Platas-Iglesias C, Baranyai Z, Tei L. The critical role of ligand topology: strikingly different properties of Gd( iii) complexes with regioisomeric AAZTA derivatives. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00451h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Two regioisomeric Gd(III) complexes with heptadentate AAZTA-like ligands show different hydration state (q = 1 and 2) and astonishingly different thermodynamic stability and dissociation kinetics.
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Affiliation(s)
- Jonathan Martinelli
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
| | - Mariangela Boccalon
- Bracco Research Centre, Bracco Imaging S.p.A., Via Ribes 5, 10010, Colleretto Giacosa, Italy
| | - David Horvath
- Bracco Research Centre, Bracco Imaging S.p.A., Via Ribes 5, 10010, Colleretto Giacosa, Italy
- University of Debrecen, Faculty of Science and Technology, Department of Physical Chemistry, Doctoral School of Chemistry, Debrecen, Hungary
| | - David Esteban-Gomez
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain
| | - Zsolt Baranyai
- Bracco Research Centre, Bracco Imaging S.p.A., Via Ribes 5, 10010, Colleretto Giacosa, Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
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5
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A Semi Rigid Novel Hydroxamate AMPED-Based Ligand for 89Zr PET Imaging. Molecules 2021; 26:molecules26195819. [PMID: 34641362 PMCID: PMC8512011 DOI: 10.3390/molecules26195819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/16/2021] [Accepted: 09/20/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, we designed, developed, characterized, and investigated a new chelator and its bifunctional derivative for 89Zr labeling and PET-imaging. In a preliminary study, we synthesized two hexadentate chelators named AAZTHAS and AAZTHAG, based on the seven-membered heterocycle AMPED (6-amino-6-methylperhydro-1,4-diazepine) with the aim to increase the rigidity of the 89Zr complex by using N-methyl-N-(hydroxy)succinamide or N-methyl-N-(hydroxy)glutaramide pendant arms attached to the cyclic structure. N-methylhydroxamate groups are the donor groups chosen to efficiently coordinate 89Zr. After in vitro stability tests, we selected the chelator with longer arms, AAZTHAG, as the best complexing agent for 89Zr presenting a stability of 86.4 ± 5.5% in human serum (HS) for at least 72 h. Small animal PET/CT static scans acquired at different time points (up to 24 h) and ex vivo organ distribution studies were then carried out in healthy nude mice (n = 3) to investigate the stability and biodistribution in vivo of this new 89Zr-based complex. High stability in vivo, with low accumulation of free 89Zr in bones and kidneys, was measured. Furthermore, an activated ester functionalized version of AAZTHAG was synthesized to allow the conjugation with biomolecules such as antibodies. The bifunctional chelator was then conjugated to the human anti-HER2 monoclonal antibody Trastuzumab (Tz) as a proof of principle test of conjugation to biologically active molecules. The final 89Zr labeled compound was characterized via radio-HPLC and SDS-PAGE followed by autoradiography, and its stability in different solutions was assessed for at least 4 days.
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Travagin F, Lattuada L, Giovenzana GB. AAZTA: The rise of mesocyclic chelating agents for metal coordination in medicine. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213908] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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7
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Synthesis of a rigidified bicyclic AAZTA-like ligand and relaxometric characterization of its GdIII complex. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152573] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8
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Martinelli J, Remotti D, Tei L. Selective functionalization of 6-amino-6-methyl-1,4-perhydrodiazepine for the synthesis of a library of polydentate chelators. Org Biomol Chem 2020; 18:5245-5252. [PMID: 32614034 DOI: 10.1039/d0ob00980f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polydentate chelators are an important part of an imaging probe, which consists of an agent that usually produces signals for imaging purposes connected to a targeting moiety. The goal of this study was to set up a generic protocol to prepare a library of polydentate ligands having a 6-amino-6-methyl-1,4-perhydrodiazepine (AMPED) core and able to chelate metal ions of interest for various diagnostic imaging techniques, including Magnetic Resonance Imaging (MRI), Positron Emission Tomography (PET) and Single-Photon Emission Computed Tomography (SPECT). These ions, among which we can include Mn(ii), Cu(ii), Al(iii) or Ga(iii), require penta- or hexa-dentate chelators for this purpose, and the AMPED scaffold has considerable potential to support various pendant arms for coordination of such ions. AMPED already has three amino nitrogen donors; thus, only two or three additional arms should be introduced to obtain penta- or hexa-dentate systems. This condition implies that symmetrical or asymmetrical structures have to be developed, depending on the functionalization of cyclic and exocyclic amines. Starting from easily available materials, we have designed a convenient protocol for the preparation of multiple AMPED-based ligands endowed with different characteristics, several of which were synthesized as examples.
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Affiliation(s)
- Jonathan Martinelli
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
| | - Davide Remotti
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università del Piemonte Orientale "A. Avogadro", Viale Michel 11, 15121 Alessandria, Italy.
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9
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Wang X, Jaraquemada-Peláez MDG, Cao Y, Ingham A, Rodríguez-Rodríguez C, Pan J, Wang Y, Saatchi K, Häfeli UO, Lin KS, Orvig C. H2CHXhox: Rigid Cyclohexane-Reinforced Nonmacrocyclic Chelating Ligand for [nat/67/68Ga]Ga3+. Inorg Chem 2020; 59:4895-4908. [DOI: 10.1021/acs.inorgchem.0c00168] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Xiaozhu Wang
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1, Canada
| | | | - Yang Cao
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1, Canada
| | - Aidan Ingham
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1, Canada
- Life Sciences Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3,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
| | - Jinhe Pan
- Department of Molecular Oncology, BC Cancer Research Centre, Vancouver BC V5Z 1L3, Canada
| | - Yongliang Wang
- Department of Molecular Oncology, BC Cancer Research Centre, Vancouver BC V5Z 1L3, 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
| | - Kuo-Shyan Lin
- Department of Molecular Oncology, BC Cancer Research Centre, Vancouver BC V5Z 1L3, Canada
| | - Chris Orvig
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, Vancouver BC V6T 1Z1, Canada
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10
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Greifenstein L, Späth D, Sinnes JP, Grus T, Rösch F. Mild and efficient 64Cu labeling of perhydro-1, 4-diazepine derivatives for potential use with large peptides, proteins and antibodies. RADIOCHIM ACTA 2020. [DOI: 10.1515/ract-2019-3167] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Abstract
DATA (6-Amino-1,4-diazapine-triacetate) and AAZTA (6-Amino-1,4-diazapine-tetracetate) chelators represent a novel approach representing hybrid-chelates: possessing significant cyclic and acyclic character. It is believed that flexibility of the acyclic part facilitates rapid complexation, whilst the preorganized cyclic part minimizes the energy barrier to complexation and inhibits decomplexation processes. So far, these chelators have been used exclusively with 44Sc and 68Ga only. Recent results with natCu predict high stabilities for Cu-AAZTA, yet no radioactive labeling of AAZTA or DATA with 64Cu or any additional radioactive isotope has been reported. We present the one pot synthesis of the bifunctional derivatives AAZTA5OMe and DATA5mOMe and their labeling with 64Cu. In addition, in vitro stability of the respective complexes are presented.
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Affiliation(s)
- Lukas Greifenstein
- Institute of Nuclear Chemistry , Johannes Gutenberg University , Fritz-Straßmann-Weg 2 , 55128 Mainz , Germany
| | - Denise Späth
- Institute of Nuclear Chemistry , Johannes Gutenberg University , Fritz-Straßmann-Weg 2 , 55128 Mainz , Germany
| | - Jean Phillip Sinnes
- Institute of Nuclear Chemistry , Johannes Gutenberg University , Fritz-Straßmann-Weg 2 , 55128 Mainz , Germany
| | - Tilmann Grus
- Institute of Nuclear Chemistry , Johannes Gutenberg University , Fritz-Straßmann-Weg 2 , 55128 Mainz , Germany
| | - Frank Rösch
- Institute of Nuclear Chemistry , Johannes Gutenberg University , Fritz-Straßmann-Weg 2 , 55128 Mainz , Germany
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11
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Farkas E, Vágner A, Negri R, Lattuada L, Tóth I, Colombo V, Esteban-Gómez D, Platas-Iglesias C, Notni J, Baranyai Z, Giovenzana GB. PIDAZTA: Structurally Constrained Chelators for the Efficient Formation of Stable Gallium-68 Complexes at Physiological pH. Chemistry 2019; 25:10698-10709. [PMID: 31149749 DOI: 10.1002/chem.201901512] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 05/28/2019] [Indexed: 12/11/2022]
Abstract
Two structurally constrained chelators based on a fused bicyclic scaffold, 4-amino-4-methylperhydro-pyrido[1,2-a][1,4]diazepin-N,N',N'-triacetic acids [(4R*,10aS*)-PIDAZTA (L1) and (4R*,10aR*)-PIDAZTA (L2)], were designed for the preparation of GaIII -based radiopharmaceuticals. The stereochemistry of the ligand scaffold has a deep impact on the properties of the complexes, with unexpected [Ga(L2)OH] species being superior in terms of both thermodynamic stability and inertness. This peculiar behavior was rationalized on the basis of molecular modeling and appears to be related to a better fit in size of GaIII into the cavity of L2. Fast and efficient formation of the GaIII chelates at room temperature was observed at pH values between 7 and 8, which enables 68 Ga radiolabeling under truly physiological conditions (pH 7.4).
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Affiliation(s)
- Edit Farkas
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Adrienn Vágner
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Roberto Negri
- Dip. di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, 28100, Novara, Italy
| | - Luciano Lattuada
- Bracco Imaging spa, Bracco Research Centre, Via Ribes 5, 10010, Colleretto Giacosa (TO), Italy
| | - Imre Tóth
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary.,Dept. of Physical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary
| | - Valentina Colombo
- Dip. di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133, Milano, Italy
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Dep. de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Dep. de Química, Facultade de Ciencias, Universidade da Coruña, 15071 A Coruña, Galicia, Spain
| | - Johannes Notni
- Institute of Pathology, Technische Universität München, Trogerstrasse 18, 81675, Munich, Germany
| | - Zsolt Baranyai
- Dept. of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, H-4010, Debrecen, Hungary.,Bracco Imaging spa, Bracco Research Centre, Via Ribes 5, 10010, Colleretto Giacosa (TO), Italy
| | - Giovanni B Giovenzana
- Dip. di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, 28100, Novara, Italy
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12
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Wang X, Jaraquemada-Peláez MDG, Cao Y, Pan J, Lin KS, Patrick BO, Orvig C. H2hox: Dual-Channel Oxine-Derived Acyclic Chelating Ligand for 68Ga Radiopharmaceuticals. Inorg Chem 2018; 58:2275-2285. [DOI: 10.1021/acs.inorgchem.8b01208] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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
| | - Yang Cao
- Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jinhe Pan
- BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, Canada
| | - Kuo-Shyan Lin
- BC Cancer Agency, 675 West 10th Avenue, Vancouver, British Columbia V5Z 1L3, 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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13
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Farkas E, Nagel J, Waldron BP, Parker D, Tóth I, Brücher E, Rösch F, Baranyai Z. Equilibrium, Kinetic and Structural Properties of Gallium(III) and Some Divalent Metal Complexes Formed with the New DATA m and DATA 5m Ligands. Chemistry 2017; 23:10358-10371. [PMID: 28504822 DOI: 10.1002/chem.201701508] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Indexed: 11/08/2022]
Abstract
The development of 68 Ge/68 Ga generators has made the positron-emitting 68 Ga isotope widely accessible and raised interest in new chelate complexes of Ga3+ . The hexadentate 1,4-di(acetate)-6-methyl[amino(methyl)acetate]perhydro-1,4-diazepane (DATAm ) ligand and its bifunctional analogue, 1,4-di(acetate)-6-pentanoic acid[amino(methyl)acetate]perhydro-1,4-diazepane (DATA5m ), rapidly form complexes with 68 Ga in high radiochemical yield. The stability constants of DATAm and DATA5m complexes formed with Ga3+ , Zn2+ , Cu2+ , Mn2+ and Ca2+ have been determined by using pH potentiometry, spectrophotometry (Cu2+ ) and 1 H and 71 Ga NMR spectroscopy (Ga3+ ). The stability constants of Ga(DATAm ) and Ga(DATA5m ) complexes are slightly higher than those of Ga(AAZTA). The species distribution calculations indicated the predominance of Ga(L)OH mixed-hydroxo complexes at physiological pH. The 1 H and 71 Ga NMR spectroscopy studies provided information about the coordinated functional groups of ligands and on the kinetics of exchange between the Ga(L) and Ga(L)OH complexes. The transmetalation reactions between the Ga(L) complexes and Cu2+ citrate (6<pH<8.5) occur through both spontaneous and OH- -assisted dissociation of the Ga(L)OH species. At pH 7.4 and 25 °C, the half-lives of the dissociation of Ga(DATAm ), Ga(DATA5m ) and Ga(AAZTA) were 11, 44 and 24 h, respectively. Similar half-lives have been obtained for the ligand-exchange reactions between the Ga(L)OH complexes and transferrin. The equilibrium and kinetic data indicate that the Ga(DATA5m ) complex is a good 68 Ga-based radiodiagnostic candidate.
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Affiliation(s)
- Edit Farkas
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Johannes Nagel
- Institute of Nuclear Chemistry, University of Mainz, Fritz-Strassmann-Weg 2, 55128, Mainz, Germany
| | - Bradley P Waldron
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - David Parker
- Department of Chemistry, Durham University, South Road, Durham, DH1 3LE, UK
| | - Imre Tóth
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Ernő Brücher
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Frank Rösch
- Institute of Nuclear Chemistry, University of Mainz, Fritz-Strassmann-Weg 2, 55128, Mainz, Germany
| | - Zsolt Baranyai
- Department of Inorganic and Analytical Chemistry, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary.,Present address: Bracco Imaging-CRB/Trieste, Area Science Park. Ed. Q, SS 14, km 163.5, 34149, Basovizza Trieste, Italy
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