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Raymond JJ, Chowdhury MSI, Crawley MR, Morrow JR. Co(II) Macrocyclic Complexes with Amide-Glycinate Pendants as ParaCEST and Liposomal CEST Agents. Chemistry 2024; 30:e202401638. [PMID: 38861702 DOI: 10.1002/chem.202401638] [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: 04/26/2024] [Revised: 05/28/2024] [Accepted: 06/11/2024] [Indexed: 06/13/2024]
Abstract
Macrocyclic Co(II) complexes with appended amide-glycinate groups were prepared to develop paramagnetic Co(II) chemical exchange saturation transfer (CEST) agents of reduced overall charge. Complexes with reduced charge and lowered osmolarity are important for their loading into liposomes and to provide complexes that are highly water soluble and well tolerated in animals. Co(L1) has two non-coordinating benzyl groups and two amide-glycinate pendants, whereas Co(L2) has two unsubstituted amide pendants and two amide-glycinate pendants on cyclam (1,4,8,11-tetraazacyclododecane). The 1H NMR spectrum of Co(L1) is consistent with a single cis-pendant isomer with both amide protons in the trans-configuration, as supported by an X-ray crystal structure. Co(L2) has a mixture of different isomers in solution, including the trans-1,4 and 1,8 pendant isomers. The Z-spectrum of Co(L1) shows one highly-shifted CEST peak, whereas Co(L2) exhibits six CEST peaks. Encapsulation of 40 mM Co(L1) in a liposome with osmotically-induced shrinking at 300 mOsm/L produces a liposomal CEST agent with saturation frequency offset of 3 ppm. Addition of the amphiphilic 1,4,7-triazacyclononane-based complex Co(L5) to the liposomal bilayer at 18 mM with Co(L1) encapsulated in the liposome at 50 mM changes the sign and increases the magnitude of the saturation frequency offset to -7.5 ppm at 300 mOsm/L.
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Affiliation(s)
- Jaclyn J Raymond
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260
| | - Md Saiful I Chowdhury
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260
| | - Matthew R Crawley
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, NY 14260
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2
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Uzal-Varela R, Rodríguez-Rodríguez A, Lalli D, Valencia L, Maneiro M, Botta M, Iglesias E, Esteban-Gómez D, Angelovski G, Platas-Iglesias C. Endeavor toward Redox-Responsive Transition Metal Contrast Agents Based on the Cross-Bridge Cyclam Platform. Inorg Chem 2024; 63:1575-1588. [PMID: 38198518 PMCID: PMC10806912 DOI: 10.1021/acs.inorgchem.3c03486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 12/21/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024]
Abstract
We present the synthesis and characterization of a series of Mn(III), Co(III), and Ni(II) complexes with cross-bridge cyclam derivatives (CB-cyclam = 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane) containing acetamide or acetic acid pendant arms. The X-ray structures of [Ni(CB-TE2AM)]Cl2·2H2O and [Mn(CB-TE1AM)(OH)](PF6)2 evidence the octahedral coordination of the ligands around the Ni(II) and Mn(III) metal ions, with a terminal hydroxide ligand being coordinated to Mn(III). Cyclic voltammetry studies on solutions of the [Mn(CB-TE1AM)(OH)]2+ and [Mn(CB-TE1A)(OH)]+ complexes (0.15 M NaCl) show an intricate redox behavior with waves due to the MnIII/MnIV and MnII/MnIII pairs. The Co(III) and Ni(II) complexes with CB-TE2A and CB-TE2AM show quasi-reversible features due to the CoIII/CoII or NiII/NiIII pairs. The [Co(CB-TE2AM)]3+ complex is readily reduced by dithionite in aqueous solution, as evidenced by 1H NMR studies, but does not react with ascorbate. The [Mn(CB-TE1A)(OH)]+ complex is however reduced very quickly by ascorbate following a simple kinetic scheme (k0 = k1[AH-], where [AH-] is the ascorbate concentration and k1 = 628 ± 7 M-1 s-1). The reduction of the Mn(III) complex to Mn(II) by ascorbate provokes complex dissociation, as demonstrated by 1H nuclear magnetic relaxation dispersion studies. The [Ni(CB-TE2AM)]2+ complex shows significant chemical exchange saturation transfer effects upon saturation of the amide proton signals at 71 and 3 ppm with respect to the bulk water signal.
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Affiliation(s)
- Rocío Uzal-Varela
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Aurora Rodríguez-Rodríguez
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Daniela Lalli
- Dipartimento
di Scienze e Innovazione Tecnologica, Magnetic Resonance Platform
(PRISMA-UPO), Universitá del Piemonte
Orientale, Viale T. Michel
11, Alessandria 15121, Italy
| | - Laura Valencia
- Departamento
de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende 36310, Pontevedra, Spain
| | - Marcelino Maneiro
- Departamento
de Química Inorgánica, Facultade de Ciencias, Campus
Terra, Universidade de Santiago de Compostela, Lugo 27002, Galicia, Spain
| | - Mauro Botta
- Dipartimento
di Scienze e Innovazione Tecnologica, Magnetic Resonance Platform
(PRISMA-UPO), Universitá del Piemonte
Orientale, Viale T. Michel
11, Alessandria 15121, Italy
| | - Emilia Iglesias
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - David Esteban-Gómez
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
| | - Goran Angelovski
- Laboratory
of Molecular and Cellular Neuroimaging, International Center for Primate
Brain Research (ICPBR), Center for Excellence in Brain Science and
Intelligence Technology (CEBSIT), Chinese
Academy of Sciences (CAS), Shanghai 201602, PR China
| | - Carlos Platas-Iglesias
- Centro
Interdisciplinar de Química e Bioloxía (CICA) and Departamento
de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña 15071, Galicia, Spain
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3
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Panda SK, Rai A, Singh AK. Study of paraCEST response on six-coordinated Co(II) and Ni(II) complexes of a pyridine-tetraamide-based ligand. Dalton Trans 2023. [PMID: 38009007 DOI: 10.1039/d3dt02283h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2023]
Abstract
This study highlights the successful synthesis of a potential ligand, 2,2',2'',2'''-((pyridine-2,6-diylbis(methylene))bis(azanetriyl))tetraacetamide (PATA), along with its corresponding Co(II) and Ni(II) complexes for paraCEST-based agents. X-ray diffraction data confirmed that both the complexes are six coordinated with distorted octahedral geometries, but only the [Co(PATA)]2+ complex has a good structural feature to show paraCEST activity. After a thorough characterization of the ligand and both of its complexes, various studies, including solution-state magnetic properties, redox properties, temperature, and pH variation studies, were carried out. [Co(PATA)]2+ remained inert in the presence of competing ions, under acidic conditions, at high temperatures, and in the physiological pH range. The paraCEST response of [Co(PATA)]2+ has been measured in the presence of HEPES buffer medium, and a high paraCEST feature was discovered at both 37 and 25 °C. The pH variation paraCEST studies were carried out and the exchange rate constant of the probe at 37 and 25 °C was also determined. However, due to the fast exchange of water protons, the [Ni(PATA)(OH2)]2+ complex remained inactive in the CEST process.
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Affiliation(s)
- Suvam Kumar Panda
- Indian Institute of Technology Bhubaneswar, Khordha, Odisha, 752050, India.
| | - Ankit Rai
- Indian Institute of Technology Bhubaneswar, Khordha, Odisha, 752050, India.
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Sherry AD, Castelli DD, Aime S. Prospects and limitations of paramagnetic chemical exchange saturation transfer agents serving as biological reporters in vivo. NMR IN BIOMEDICINE 2023; 36:e4698. [PMID: 35122337 PMCID: PMC9984198 DOI: 10.1002/nbm.4698] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/10/2022] [Accepted: 01/18/2022] [Indexed: 05/23/2023]
Abstract
The concept of using paramagnetic metal ion complexes as chemical exchange saturation transfer agents (paraCEST) for molecular imaging of various biological processes first appeared in the literature about 20 years ago. The first paraCEST agent was based on a highly shifted, inner-sphere, slowly exchanging water molecule that could be activated at a frequency far away from bulk water, a substantial advantage for selective activation of the agent alone. Many other paraCEST agent designs followed that were based on activation of exchanging -NH or -OH proton on the chelate itself. Both types of paraCEST designs are attractive for molecular imaging because the rates of water molecule or ligand proton exchange can be designed to be sensitive to a biological or physiological property such as pH, enzyme activity, or redox. Hence, the intensity or frequency of the resulting CEST signal provides a direct readout of that property. Many molecular designs have appeared in the literature over the past 20 years, mostly reported as proof-of-concept designs but, unfortunately, only a few reports have explored the limitations of paraCEST agents for imaging a biological process in vivo. As a community, we now know that the sensitivity of paraCEST agents is lower than one might anticipate based upon simple chemical exchange principles and, in general, it appears the sensitivity of paraCEST agents is even lower in vivo than in vitro. In this short review, we address some of the factors that contribute to the limited sensitivity of paraCEST agents in vivo, offer some thoughts on approaches that could lead to dramatically improved paraCEST sensitivity, and challenge the scientific community to perform more in vivo experiments designed to test these ideas.
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Affiliation(s)
- A. Dean Sherry
- Department of Chemistry and Biochemistry, University of Texas at Dallas, Richardson, Texas, USA
- Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Daniela Delli Castelli
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Turin, Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, University of Turin, Turin, Italy
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5
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Pradhan RN, Irrera P, Romdhane F, Panda SK, Longo DL, Torres J, Kremer C, Assaiya A, Kumar J, Singh AK. Di-Pyridine-Containing Macrocyclic Triamide Fe(II) and Ni(II) Complexes as ParaCEST Agents. Inorg Chem 2022; 61:16650-16663. [PMID: 36205705 DOI: 10.1021/acs.inorgchem.2c02242] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fe(II) and Ni(II) paraCEST contrast agents containing the di-pyridine macrocyclic ligand 2,2',2″-(3,7,10-triaza-1,5(2,6)-dipyridinacycloundecaphane-3,7,10-triyl)triacetamide (DETA) are reported here. Both [Fe(DETA)]2+ and [Ni(DETA)]2+ complexes were structurally characterized. Crystallographic data revealed the seven-coordinated distorted pentagonal bipyramidal geometry of the [Fe(DETA)]·(BF4)2·MeCN complex with five coordinated nitrogen atoms from the macrocyclic ring and two coordinated oxygen atoms from two amide pendant arms. The [Ni(DETA)]·Cl2·2H2O complex was six-coordinated in nature with a distorted octahedral geometry. Four coordinated nitrogen atoms were from the macrocyclic ring, and two coordinated oxygen atoms were from two amide pendant arms. [Fe(DETA)]2+ exhibited well-resolved sharp proton resonances, whereas very broad proton resonances were observed in the case of [Ni(DETA)]2+ due to the long electronic relaxation times. The CEST peaks for the [Fe(DETA)]2+ complex showed one highly downfield-shifted and intense peak at 84 ppm with another shifted but less intense peak at 28 ppm with good CEST contrast efficiency at body temperature, whereas [Ni(DETA)]2+ showed only one highly shifted intense peak at 78 ppm from the bulk water protons. Potentiometric titrations were performed to determine the protonation constants of the ligand and the thermodynamic stability constant of the [M(DETA)]2+ (M = Fe, Co, Ni, Cu, Zn) species at 25.0 °C and I = 0.15 mol·L-1 NaClO4. Metal exchange studies confirmed the stability of the complexes in acidic medium in the presence of physiologically relevant anions and an equimolar concentration of Zn(II) ions.
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Affiliation(s)
- Rabindra N Pradhan
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar752050, India
| | - Pietro Irrera
- University of Campania "Luigi Vanvitelli", Caserta81100, Italy
| | - Feriel Romdhane
- Institute of Biostructures and Bioimaging (IBB), National Research Council of Italy (CNR), Torino10126, Italy
| | - Suvam Kumar Panda
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar752050, India
| | - Dario Livio Longo
- Institute of Biostructures and Bioimaging (IBB), National Research Council of Italy (CNR), Torino10126, Italy
| | - Julia Torres
- Área Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Montevideo11800, Uruguay
| | - Carlos Kremer
- Área Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Montevideo11800, Uruguay
| | - Anshul Assaiya
- National Centre for Cell Science, NCCS Complex, Pune University Campus, Ganeshkhind, Pune411 007, India
| | - Janesh Kumar
- National Centre for Cell Science, NCCS Complex, Pune University Campus, Ganeshkhind, Pune411 007, India
| | - Akhilesh K Singh
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar752050, India
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6
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Morrow JR, Raymond JJ, Chowdhury MSI, Sahoo PR. Redox-Responsive MRI Probes Based on First-Row Transition-Metal Complexes. Inorg Chem 2022; 61:14487-14499. [PMID: 36067522 DOI: 10.1021/acs.inorgchem.2c02197] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The presence of multiple oxidation and spin states of first-row transition-metal complexes facilitates the development of switchable MRI probes. Redox-responsive probes capitalize on a change in the magnetic properties of the different oxidation states of the paramagnetic metal ion center upon exposure to biological oxidants and reductants. Transition-metal complexes that are useful for MRI can be categorized according to whether they accelerate water proton relaxation (T1 or T2 agents), induce paramagnetic shifts of 1H or 19F resonances (paraSHIFT agents), or are chemical exchange saturation transfer (CEST) agents. The various oxidation state couples and their properties as MRI probes are summarized with a focus on Co(II)/Co(III) or Fe(II)/Fe(III) complexes as small molecules or as liposomal agents. Solution studies of these MRI probes are reviewed with an emphasis on redox changes upon treatment with oxidants or with enzymes that are physiologically important in inflammation and disease. Finally, we outline the challenges of developing these probes further for in vivo MRI applications.
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Affiliation(s)
- Janet R Morrow
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Jaclyn J Raymond
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Md Saiful I Chowdhury
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Priya Ranjan Sahoo
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
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7
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Xiao L, Meng F, Xiao R, Wang H, Tian X. Bis (tridentate) divalent first-row transition metal ion (Zn, Mn, Fe, Ni, Co) complexes: Crystal structure, nonlinear optical property, and magnetic resonance imaging. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121655] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Patel A, Abozeid SM, Cullen PJ, Morrow JR. Co(II) Macrocyclic Complexes Appended with Fluorophores as paraCEST and cellCEST Agents. Inorg Chem 2020; 59:16531-16544. [PMID: 33138368 DOI: 10.1021/acs.inorgchem.0c02470] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Four high-spin macrocyclic Co(II) complexes with hydroxypropyl or amide pendants and appended coumarin or carbostyril fluorophores were prepared as CEST (chemical exchange saturation transfer) MRI probes. The complexes were studied in solution as paramagnetic CEST (paraCEST) agents and after loading into Saccharomyces cerevisiae yeast cells as cell-based CEST (cellCEST) agents. The fluorophores attached to the complexes through an amide linkage imparted an unusual pH dependence to the paraCEST properties of all four complexes through of ionization of a group that was attributed to the amide NH linker. The furthest shifted CEST peak for the hydroxypropyl-based complexes changed by ∼90 ppm upon increasing the pH from 5 to 7.5. At acidic pH, the Co(II) complexes exhibited three to four CEST peaks with the most highly shifted CEST peak at 200 ppm. The complexes demonstrated substantial paramagnetic water proton shifts which is a requirement for the development of cellCEST agents. The large shift in the proton resonance was attributed to an inner-sphere water at neutral pH, as shown by variable temperature 17O NMR spectroscopy studies. Labeling of yeast with one of these paraCEST agents was optimized with fluorescence microscopy and validated by using ICP mass spectrometry quantitation of cobalt. A weak asymmetry in the Z-spectra was observed in the yeast labeled with a Co(II) complex, toward a cellCEST effect, although the Co(II) complexes were toxic to the cells at the concentrations necessary for observation of cellCEST.
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Affiliation(s)
- Akanksha Patel
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Samira M Abozeid
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Paul J Cullen
- Department of Biological Sciences, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, the State University of New York, Amherst, New York 14260, United States
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9
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Rodríguez-Rodríguez A, Zaiss M, Esteban-Gómez D, Angelovski G, Platas-Iglesias C. Paramagnetic chemical exchange saturation transfer agents and their perspectives for application in magnetic resonance imaging. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1823167] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Aurora Rodríguez-Rodríguez
- Departamento de Química, Facultade de Ciencias & Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Moritz Zaiss
- Department of Neuroradiology, University Clinic Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - David Esteban-Gómez
- Departamento de Química, Facultade de Ciencias & Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, Tübingen, Germany
- Lab of Molecular and Cellular Neuroimaging, International Center for Primate Brain Research (ICPBR), Center for Excellence in Brain Science and Intelligence Technology (CEBSIT), Chinese Academy of Science (CAS), Shanghai, P.R. China
| | - Carlos Platas-Iglesias
- Departamento de Química, Facultade de Ciencias & Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, 15071 A Coruña, Spain
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10
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Snyder EM, Chowdhury MSI, Morrow JR. Co(II) and Fe(II) triazole-appended 4,10-diaza-15-crown-5-ether Macrocyclic complexes for CEST MRI applications. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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11
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Bond CJ, Cineus R, Nazarenko AY, Spernyak JA, Morrow JR. Isomeric Co(ii) paraCEST agents as pH responsive MRI probes. Dalton Trans 2020; 49:279-284. [PMID: 31833500 DOI: 10.1039/c9dt04558a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A newly discovered isomer of Co(ii) (1,4,8,11-tetrakis(carbamoylmethyl)-1,4,8,11-tetraazacyclotetradecane = CCRM) produces four highly paramagnetically shifted chemical exchange saturation transfer (CEST) peaks. The 1,8-pendants of the complex are bound in a trans-arrangement to produce a Co(ii) complex of increased kinetic inertness. The isomers have a stabilized Co(ii) center (E1/2 of 540 to 550 mV versus SHE). Both the 1,8 and the 1,4-isomer are excellent pH probes in solution and in tissue homogenate by virtue of their highly paramagnetically shifted amide protons. These isomers produce both a ratiometric pH readout as well as amide proton exchange rate constants that correlate to pH.
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Affiliation(s)
- Christopher J Bond
- Department of Chemistry, Natural Sciences Complex, University at Buffalo, the State University of New York, Amherst, NY 14260, USA.
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12
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Gupta A, Caravan P, Price WS, Platas-Iglesias C, Gale EM. Applications for Transition-Metal Chemistry in Contrast-Enhanced Magnetic Resonance Imaging. Inorg Chem 2020; 59:6648-6678. [PMID: 32367714 DOI: 10.1021/acs.inorgchem.0c00510] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Contrast-enhanced magnetic resonance imaging (MRI) is an indispensable tool for diagnostic medicine. However, safety concerns related to gadolinium in commercial MRI contrast agents have emerged in recent years. For patients suffering from severe renal impairment, there is an important unmet medical need to perform contrast-enhanced MRI without gadolinium. There are also concerns over the long-term effects of retained gadolinium within the general patient population. Demand for gadolinium-free MRI contrast agents is driving a new wave of inorganic chemistry innovation as researchers explore paramagnetic transition-metal complexes as potential alternatives. Furthermore, advances in personalized care making use of molecular-level information have motivated inorganic chemists to develop MRI contrast agents that can detect pathologic changes at the molecular level. Recent studies have highlighted how reaction-based modulation of transition-metal paramagnetism offers a highly effective mechanism to achieve MRI contrast enhancement that is specific to biochemical processes. This Viewpoint highlights how recent advances in transition-metal chemistry are leading the way for a new generation of MRI contrast agents.
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Affiliation(s)
- Abhishek Gupta
- Nanoscale Organisation and Dynamics Group, School of Science and Health, Western Sydney University, Penrith, New South Wales 2751, Australia.,Ingham Institute of Applied Medical Research, Liverpool, New South Wales 2170, Australia
| | | | - William S Price
- Nanoscale Organisation and Dynamics Group, School of Science and Health, Western Sydney University, Penrith, New South Wales 2751, Australia.,Ingham Institute of Applied Medical Research, Liverpool, New South Wales 2170, Australia
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, A Coruña, Galicia 15071, Spain
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13
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Baranyai Z, Delli Castelli D, Platas-Iglesias C, Esteban-Gomez D, Bényei A, Tei L, Botta M. Combined NMR, DFT and X-ray studies highlight structural and hydration changes of [Ln(AAZTA)]− complexes across the series. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01442j] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
1H NMR, CEST, DFT and X-ray studies reveal that [Ln(AAZTA)]− chelates experience a transition across the Ln(iii) series from fast-exchanging, bisaqua 9-coordinate species, to slow-exchanging monoaqua 8-coordinate structures.
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Affiliation(s)
- Zsolt Baranyai
- Bracco Imaging SpA
- Bracco Research Center
- Colleretto Giacosa (TO)
- Italy
| | - Daniela Delli Castelli
- Department of Molecular Biotechnology and Health Science
- University of Turin
- 10126 Torino
- Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - David Esteban-Gomez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Facultade de Ciencias
- Universidade da Coruña
- 15071 A Coruña
- Spain
| | - Attila Bényei
- Department of Physical Chemistry
- Faculty of Science and Technology
- University of Debrecen
- Hungary
| | - Lorenzo Tei
- Department of Science and Technological Innovation
- Università del Piemonte Orientale
- Alessandria
- Italy
| | - Mauro Botta
- Department of Science and Technological Innovation
- Università del Piemonte Orientale
- Alessandria
- Italy
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14
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Thermodynamics of complex formation in dimethylsulfoxide: The case of Co(II) complexes with nitrogen donor ligands and their O2 adducts. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Pinto SM, Tomé V, Calvete MJ, Castro MMC, Tóth É, Geraldes CF. Metal-based redox-responsive MRI contrast agents. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Bond CJ, Sokolow GE, Crawley MR, Burns PJ, Cox JM, Mayilmurugan R, Morrow JR. Exploring Inner-Sphere Water Interactions of Fe(II) and Co(II) Complexes of 12-Membered Macrocycles To Develop CEST MRI Probes. Inorg Chem 2019; 58:8710-8719. [PMID: 31247845 DOI: 10.1021/acs.inorgchem.9b01072] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Several paramagnetic Co(II) and Fe(II) macrocyclic complexes were prepared with the goal of introducing a bound water ligand to produce paramagnetically shifted water 1H resonances and for paramagnetic chemical exchange saturation transfer (paraCEST) applications. Three 12-membered macrocycles with amide pendent groups including 1,7-bis(carbamoylmethyl)-1,4,7,10-tetraazacyclodocane (DCMC), 4,7,10-tris(carbamoylmethyl)-,4,7,10-triaza-12-crown-ether (N3OA), and 4,10-bis(carbamoylmethyl)-4,10-diaza-12-crown-ether (NODA) were prepared and their Co(II) complexes were characterized in the solid state and in solution. The crystal structure of [Co(DCMC)]Br2 featured a six-coordinated Co(II) center with distorted octahedral geometry, while [Co(NODA)(OH2)]Cl2 and [Co(N3OA)](NO3)2 were seven-coordinated. The analogous Fe(II) complexes of NODA and NO3A were successfully prepared, but the complex of DCMC oxidized rapidly to the Fe(III) form. Similarly, [Fe(NODA)]2+ oxidized over several days, forming crystals of the Fe(III) complex isolated as the μ-O bridged dimer. Magnetic susceptibility values and paramagnetic NMR spectra of the Fe(II) complexes of NODA and N3OA, as well as Co(II) complexes of DCMC, NODA, and N3OA, were consistent with high spin complexes. CEST peaks ranging from 60 ppm to 70 ppm, attributed to NH groups of the amide pendents, were identified. Variable-temperature 17O NMR spectra of Co(II) and Fe(II) NODA complexes were consistent with rapid exchange of the water ligand with bulk water. Notably, the Co(II) and Fe(II) complexes presented here produced substantial paramagnetic shifts of bulk water 1H resonances, independent of having an inner-sphere water.
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Affiliation(s)
- Christopher J Bond
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Gregory E Sokolow
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Matthew R Crawley
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Patrick J Burns
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Jordan M Cox
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Ramasamy Mayilmurugan
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
| | - Janet R Morrow
- Department of Chemistry , University at Buffalo, State University of New York , Amherst , New York 14260 , United States
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17
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Pradhan RN, Chakraborty S, Bharti P, Kumar J, Ghosh A, Singh AK. Seven coordinate Co(ii) and six coordinate Ni(ii) complexes of an aromatic macrocyclic triamide ligand as paraCEST agents for MRI. Dalton Trans 2019; 48:8899-8910. [PMID: 31140528 DOI: 10.1039/c9dt00747d] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
We are reporting Co(ii) and Ni(ii) complexes of a pyridine containing aromatic macrocyclic triamide ligand, 3,6,9,15-tetraazabicyclo(9.3.1)pentadeca-1(15),11,13-triene-3,6,9-triacetamide (TPTA), as paramagnetic chemical exchange saturation transfer (paraCEST) MRI contrast agents. The synthesis and characterization of TPTA and its complexes are reported. The solution chemistry and solid-state structure of Co(ii) and Ni(ii) complexes are studied. Crystallographic data show that the [Co(TPTA)]·Cl2·2H2O complex (seven-coordinate, all four N atoms of ring and three amide O atoms) has a distorted pentagonal bipyramidal geometry, however the [Ni(TPTA)Cl]·Cl·0.25H2O complex (six-coordinate, all four N atoms of the ring, one amide O and one chloride ion) adopts a distorted octahedral geometry. Notably the two pendent amide arms are not coordinated in the [Ni(TPTA)Cl]+ complex and one chloride ion fulfils its sixth coordination. The CEST effect of [Co(TPTA)]2+ and [Ni(TPTA)Cl]+ amide protons is observed at 57 ppm and 78 ppm downfield of the bulk water proton respectively in a buffer solution containing 20 mM N-(2-hydroxyethyl)piperazine-N'-ethanesulfonic acid and 100 mM NaCl at pH 7.4 at 37 °C on a 9.4 T NMR spectrometer. The effects of CEST intensity and exchange rate constant with variation of pH of the solution were studied. The CEST effect and exchange rate constant for the amide protons of the [Co(TPTA)]2+ complex have been monitored in HEPES buffer, fetal bovine serum (FBS), rabbit serum and 4% agarose gel (w/w). The stability of the [Co(TPTA)]2+ complex in aqueous solution towards oxidation was verified by cyclic voltammetry measurement. The stability of [Co(TPTA)]2+ has further been monitored in the presence of biologically relevant ions including HPO42-, CO32-, and Zn2+ and under acidic conditions.
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Affiliation(s)
- Rabindra N Pradhan
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar, 752050, India.
| | - Subhayan Chakraborty
- School of Chemical Sciences, National Institute of Science Education and Research (HBNI) Bhubaneswar, 752050, India.
| | - Pratibha Bharti
- National Centre for Cell Science, NCCS Complex, Pune University Campus, Ganeshkhind, Pune 411 007, India
| | - Janesh Kumar
- National Centre for Cell Science, NCCS Complex, Pune University Campus, Ganeshkhind, Pune 411 007, India
| | - Arindam Ghosh
- School of Chemical Sciences, National Institute of Science Education and Research (HBNI) Bhubaneswar, 752050, India.
| | - Akhilesh K Singh
- School of Basic Sciences, Indian Institute of Technology Bhubaneswar, Bhubaneswar, 752050, India.
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18
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Scepaniak JJ, Kang EB, John M, Kaminsky W, Dechert S, Meyer F. Non‐Macrocyclic Schiff Base Complexes of Iron(II) as ParaCEST Agents for MRI. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801565] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Jeremiah J. Scepaniak
- Institut für Anorganische Chemie Georg‐August‐Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
- Department of Chemistry Drexel University 32 S. 32nd St. Disque Hall 506 19104 Philadelphia PA USA
| | - Eun Byoung Kang
- Department of Chemistry Drexel University 32 S. 32nd St. Disque Hall 506 19104 Philadelphia PA USA
| | - Michael John
- Institut für Anorganische Chemie Georg‐August‐Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
| | - Werner Kaminsky
- Department of Chemistry University of Washington Box 351700 98195‐1700 Seattle WA USA
| | - Sebastian Dechert
- Institut für Anorganische Chemie Georg‐August‐Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
| | - Franc Meyer
- Institut für Anorganische Chemie Georg‐August‐Universität Göttingen Tammannstrasse 4 37077 Göttingen Germany
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19
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Renfrew AK, O'Neill ES, Hambley TW, New EJ. Harnessing the properties of cobalt coordination complexes for biological application. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.11.027] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Thorarinsdottir AE, Tatro SM, Harris TD. Electronic Effects of Ligand Substitution in a Family of CoII2 PARACEST pH Probes. Inorg Chem 2018; 57:11252-11263. [DOI: 10.1021/acs.inorgchem.8b01896] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Scott M. Tatro
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - T. David Harris
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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21
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Caneda-Martínez L, Valencia L, Fernández-Pérez I, Regueiro-Figueroa M, Angelovski G, Brandariz I, Esteban-Gómez D, Platas-Iglesias C. Toward inert paramagnetic Ni(ii)-based chemical exchange saturation transfer MRI agents. Dalton Trans 2018; 46:15095-15106. [PMID: 29067395 DOI: 10.1039/c7dt02758c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The Ni2+ complexes with hexadentate ligands containing two 6-methylpicolinamide groups linked by ethane-1,2-diamine (dedpam) or cyclohexane-1,2-diamine (chxdedpam) spacers were investigated as potential contrast agents in magnetic resonance imaging (MRI). The properties of the complexes were compared to that of the analogues containing 6-methylpicolinate units (dedpa2- and chxdedpa2-). The X-ray structure of the [Ni(dedpam)]2+ complex reveals a six-coordinated metal ion with a distorted octahedral environment. The protonation constants of the dedpa2- and dedpam ligands and the stability constants of their Ni2+ complexes were determined using pH-potentiometry and spectrophotometric titrations (25 °C, 0.15 M NaCl). The [Ni(dedpa)] complex (log KNiL = 20.88(1)) was found to be considerably more stable than the corresponding amide derivative [Ni(dedpam)]2+ (log KNiL = 14.29(2)). However, the amide derivative [Ni(chxdedpam)]2+ was found to be considerably more inert with respect to proton-assisted dissociation than the carboxylate derivative [Ni(chxdedpa)]. A detailed 1H NMR and DFT study was conducted to assign the 1H NMR spectra of the [Ni(chxdedpa)] and [Ni(chxdedpam)]2+ complexes. The observed 1H NMR paramagnetic shifts were found to be dominated by the Fermi contact contribution. The amide resonances of [Ni(chxdedpam)]2+ at 91.5 and 22.2 ppm were found to provide a sizeable chemical exchange saturation transfer effect, paving the way for the development of NiCEST agents based on these rigid non-macrocyclic platforms.
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Affiliation(s)
- Laura Caneda-Martínez
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071, A Coruña, Galicia, Spain.
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22
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Tsitovich PB, Gendron F, Nazarenko AY, Livesay BN, Lopez AP, Shores MP, Autschbach J, Morrow JR. Low-Spin Fe(III) Macrocyclic Complexes of Imidazole-Appended 1,4,7-Triazacyclononane as Paramagnetic Probes. Inorg Chem 2018; 57:8364-8374. [DOI: 10.1021/acs.inorgchem.8b01022] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pavel B. Tsitovich
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Frédéric Gendron
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Alexander Y. Nazarenko
- Chemistry Department, State University of New York, College at Buffalo, 1300 Elmwood Avenue, Buffalo, New York 14222, United States
| | - Brooke N. Livesay
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Alejandra P. Lopez
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Matthew P. Shores
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Janet R. Morrow
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
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23
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Abozeid SM, Snyder EM, Lopez AP, Steuerwald CM, Sylvester E, Ibrahim KM, Zaky RR, Abou‐El‐Nadar HM, Morrow JR. Nickel(II) Complexes as Paramagnetic Shift and paraCEST Agents. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201800021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Samira M. Abozeid
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
- Department of Chemistry Faculty of Science Mansoura University El‐Gomhoria Street 35516 Mansoura Egypt
| | - Eric M. Snyder
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
| | - Alejandra P. Lopez
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
| | - Charles M. Steuerwald
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
| | - Eric Sylvester
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
| | - Kamal M. Ibrahim
- Department of Chemistry Faculty of Science Mansoura University El‐Gomhoria Street 35516 Mansoura Egypt
| | - Rania R. Zaky
- Department of Chemistry Faculty of Science Mansoura University El‐Gomhoria Street 35516 Mansoura Egypt
| | - Hamed M. Abou‐El‐Nadar
- Department of Chemistry Faculty of Science Mansoura University El‐Gomhoria Street 35516 Mansoura Egypt
| | - Janet R. Morrow
- University at Buffalo, State University of New York Department of Chemistry 526 Natural Sciences Complex 14260 Amherst NY USA
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24
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Abozeid SM, Snyder EM, Tittiris TY, Steuerwald CM, Nazarenko AY, Morrow JR. Inner-Sphere and Outer-Sphere Water Interactions in Co(II) paraCEST Agents. Inorg Chem 2018; 57:2085-2095. [DOI: 10.1021/acs.inorgchem.7b02977] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Samira M. Abozeid
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Eric M. Snyder
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Timothy Y. Tittiris
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Charles M. Steuerwald
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Alexander Y. Nazarenko
- Chemistry Department, SUNY College at Buffalo, 1300 Elmwood Avenue, Buffalo, New York 14222, United States
| | - Janet R. Morrow
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
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25
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Delli Castelli D, Tei L, Carniato F, Aime S, Botta M. [Yb(AAZTA)(H2O)]−: an unconventional ParaCEST MRI probe. Chem Commun (Camb) 2018; 54:2004-2007. [DOI: 10.1039/c8cc00193f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An unexpectedly slow water exchange rate makes [Yb(AAZTA)(H2O)]− a ParaCEST agent.
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Affiliation(s)
- Daniela Delli Castelli
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino
- 10126 Torino
- Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino
- 10126 Torino
- Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica (DiSIT), Università degli Studi del Piemonte Orientale “Amedeo Avogadro”
- I-15121 Alessandria
- Italy
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26
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Srivastava K, Ferrauto G, Young VG, Aime S, Pierre VC. Eight-Coordinate, Stable Fe(II) Complex as a Dual 19F and CEST Contrast Agent for Ratiometric pH Imaging. Inorg Chem 2017; 56:12206-12213. [DOI: 10.1021/acs.inorgchem.7b01629] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Kriti Srivastava
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Giuseppe Ferrauto
- Molecular Imaging Center, Department of Molecular Biotechnologies & Health Sciences, University of Torino, 10126 Torino, Italy
| | - Victor G. Young
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Silvio Aime
- Molecular Imaging Center, Department of Molecular Biotechnologies & Health Sciences, University of Torino, 10126 Torino, Italy
| | - Valérie C. Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States
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27
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Burns PJ, Cox JM, Morrow JR. Imidazole-Appended Macrocyclic Complexes of Fe(II), Co(II), and Ni(II) as ParaCEST Agents. Inorg Chem 2017; 56:4546-4555. [DOI: 10.1021/acs.inorgchem.7b00176] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patrick J. Burns
- Department of Chemistry, University at Buffalo, The State University of New York, Amherst, New York 14260, United States
| | - Jordan M. Cox
- Department of Chemistry, University at Buffalo, The State University of New York, Amherst, New York 14260, United States
| | - Janet R. Morrow
- Department of Chemistry, University at Buffalo, The State University of New York, Amherst, New York 14260, United States
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28
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Mukherjee S, Patra D, Dinda H, Chakraborty I, Shashank L, Bhattacharyya R, Das Sarma J, Shunmugam R. Super paramagnetic Norbornene Copolymer Functionalized with Biotin and Doxorubicin: A Potential Unique Site-Specific Theranostic Agent. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00178] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saikat Mukherjee
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Diptendu Patra
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Himadri Dinda
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Ipsita Chakraborty
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Litesh Shashank
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Rangeet Bhattacharyya
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Jayasri Das Sarma
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
| | - Raja Shunmugam
- Polymer Research Centre, Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur 741 246, West Bengal, India
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29
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O'Neill ES, Kolanowski JL, Yin GH, Broadhouse KM, Grieve SM, Renfrew AK, Bonnitcha PD, New EJ. Reversible magnetogenic cobalt complexes. RSC Adv 2016. [DOI: 10.1039/c6ra04643f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A cobalt tris(2-pyridylmethyl)amine complex cycles between stable paramagnetic Co(ii) and diamagnetic Co(iii) forms with corresponding changes in the MRI contrast.
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Affiliation(s)
- E. S. O'Neill
- School of Chemistry
- The University of Sydney
- Australia
| | | | - G. H. Yin
- School of Chemistry
- The University of Sydney
- Australia
| | - K. M. Broadhouse
- Heart Research Institute
- Newtown
- Australia
- Sydney Translational Imaging Laboratory
- Sydney Medical School
| | - S. M. Grieve
- The Kolling Institute
- The University of Sydney
- Australia
- Heart Research Institute
- Newtown
| | - A. K. Renfrew
- School of Chemistry
- The University of Sydney
- Australia
| | | | - E. J. New
- School of Chemistry
- The University of Sydney
- Australia
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30
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Krchová T, Gálisová A, Jirák D, Hermann P, Kotek J. Ln(iii)-complexes of a DOTA analogue with an ethylenediamine pendant arm as pH-responsive PARACEST contrast agents. Dalton Trans 2016; 45:3486-96. [DOI: 10.1039/c5dt04443j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
New contrast agents useful for pH determination (in the biologically relevant pH range) by Magnetic Resonance Imaging (MRI) using magnetization transfer ratio approach are presented.
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Affiliation(s)
- T. Krchová
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
| | - A. Gálisová
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- Czech Republic
| | - D. Jirák
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- Czech Republic
| | - P. Hermann
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
| | - J. Kotek
- Department of Inorganic Chemistry
- Faculty of Science
- Universita Karlova (Charles University)
- 128 43 Prague 2
- Czech Republic
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31
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Olatunde AO, Bond CJ, Dorazio SJ, Cox JM, Benedict JB, Daddario MD, Spernyak JA, Morrow JR. Six, Seven or Eight Coordinate Fe(II) , Co(II) or Ni(II) Complexes of Amide-Appended Tetraazamacrocycles for ParaCEST Thermometry. Chemistry 2015; 21:18290-300. [PMID: 26494320 PMCID: PMC4679426 DOI: 10.1002/chem.201503125] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Indexed: 12/26/2022]
Abstract
Fe(II) , Co(II) and Ni(II) complexes of two tetraazamacrocycles (1,4,8,11-tetrakis(carbamoylmethyl)-1,4,8,11-tetraazacyclotetradecane (L1) and 1,4,7,10-tetrakis(carbamoylmethyl)-1,4,7,10-tetraazacyclododecane (L2) show promise as paraCEST agents for registration of temperature (paraCEST=paramagnetic chemical exchange saturation transfer). The Fe(II) , Co(II) and Ni(II) complexes of L1 show up to four CEST peaks shifted ≤112 ppm, whereas analogous complexes of L2 show only a single CEST peak at ≤69 ppm. Comparison of the temperature coefficients (CT ) of the CEST peaks of [Co(L2)](2+) , [Fe(L2)](2+) , [Ni(L1)](2+) and [Co(L1)](2+) showed that a CEST peak of [Co(L1)](2+) gave the largest CT (-0.66 ppm (o) C(-1) at 4.7 T). NMR spectral and CEST properties of these complexes correspond to coordination complex symmetry as shown by structural data. The [Ni(L1)](2+) and [Co(L1)](2+) complexes have a six-coordinate metal ion bound to the 1-, 4-amide oxygen atoms and four nitrogen atoms of the tetraazamacrocycle. The [Fe(L2)](2+) complex has an unusual eight-coordinate Fe(II) bound to four amide oxygen atoms and four macrocyclic nitrogen atoms. For [Co(L2)](2+) , one structure has seven-coordinate Co(II) with three bound amide pendents and a second structure has a six-coordinate Co(II) with two bound amide pendents.
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Affiliation(s)
- Abiola O Olatunde
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA)
| | - Christopher J Bond
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA)
| | - Sarina J Dorazio
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA)
| | - Jordan M Cox
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA)
| | - Jason B Benedict
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA)
| | - Michael D Daddario
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263 (USA)
| | - Joseph A Spernyak
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263 (USA)
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260-3000 (USA).
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32
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Mukherjee S, Dinda H, Shashank L, Chakraborty I, Bhattacharyya R, Das Sarma J, Shunmugam R. Site-Specific Amphiphilic Magnetic Copolymer Nanoaggregates for Dual Imaging. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01716] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Saikat Mukherjee
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Himadri Dinda
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Litesh Shashank
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Ipsita Chakraborty
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Rangeet Bhattacharyya
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Jayasri Das Sarma
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
| | - Raja Shunmugam
- Polymer Research Centre,
Department of Chemical Sciences, ‡Department of Physical
Sciences, and §Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur Campus, Mohanpur – 741 246, Dist. Nadia, West Bengal, India
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33
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Kuda-Wedagedara ANW, Allen MJ. Enhancing magnetic resonance imaging with contrast agents for ultra-high field strengths. Analyst 2015; 139:4401-10. [PMID: 25054827 DOI: 10.1039/c4an00990h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Contrast agents are diagnostic tools that often complement magnetic resonance imaging. At ultra-high field strengths (≥7 T), magnetic resonance imaging is capable of generating desirable high signal-to-noise ratios, but clinically available contrast agents are less effective at ultra-high field strengths relative to lower fields. This gap in effectiveness demands the development of contrast agents for ultra-high field strengths. In this minireview, we summarize contrast agents reported during the last three years that focused on ultra-high field strengths.
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34
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Drahoš B, Herchel R, Trávníček Z. Structural, Magnetic, and Redox Diversity of First-Row Transition Metal Complexes of a Pyridine-Based Macrocycle: Well-Marked Trends Supported by Theoretical DFT Calculations. Inorg Chem 2015; 54:3352-69. [DOI: 10.1021/ic503054m] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Bohuslav Drahoš
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Radovan Herchel
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
| | - Zdeněk Trávníček
- Department of Inorganic Chemistry, Regional Centre of
Advanced Technologies and Materials, Faculty of Science, Palacký University, 17. listopadu 12, CZ-771 46 Olomouc, Czech Republic
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35
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Regueiro-Figueroa M, Lima LMP, Blanco V, Esteban-Gómez D, de Blas A, Rodríguez-Blas T, Delgado R, Platas-Iglesias C. Reasons behind the Relative Abundances of Heptacoordinate Complexes along the Late First-Row Transition Metal Series. Inorg Chem 2014; 53:12859-69. [DOI: 10.1021/ic501869y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martín Regueiro-Figueroa
- Departamento
de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Luís M. P. Lima
- Instituto
de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Víctor Blanco
- Departamento
de Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva S/N, 18071 Granada, Spain
| | - David Esteban-Gómez
- Departamento
de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Andrés de Blas
- Departamento
de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Teresa Rodríguez-Blas
- Departamento
de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Rita Delgado
- Instituto
de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Carlos Platas-Iglesias
- Departamento
de Química Fundamental, Facultade de Ciencias, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
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