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Versolatto S, Boccalon M, Guidolin N, Travagin F, Alessio E, Aime S, Balducci G, Giovenzana GB, Baranyai Z. [Gd(HB-DO3A)]: Equilibrium, Dissociation Kinetic and Structural Differences in a Simple Homolog of [Gd(HP-DO3A)] (Prohance ®). Chemistry 2024; 30:e202400344. [PMID: 38469901 DOI: 10.1002/chem.202400344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/10/2024] [Accepted: 03/11/2024] [Indexed: 03/13/2024]
Abstract
[Gd(HP-DO3A)] (gadoteridol) as an active compound of ProHance® is a widely employed contrast agent in clinical MRI scans in the last 30 years. Recent concerns about the long-term retention of gadolinium-based contrast agents (GBCAs) led to a deeper investigation of the structural features underlying the integrity of the paramagnetic metal complex. Several human and nonclinical studies have noted marked differences among the macrocyclic GBCAs, with the least retention of Gd traces and most rapid elimination consistently being reported for [Gd(HP-DO3A)]. It was deemed of interest to assess how minor structural/electronic changes associated to the ligand structure may affect basic properties of the metal complex with several [Gd(HP-DO3A)] analogues synthesized and characterized in the last years. We recently reported that the closest homolog of [Gd(HP-DO3A)], i. e.: [Gd(HB-DO3A)], in which a (±)-2-hydroxy-1-propyl pendant arm is replaced by a (±)-2-hydroxy-1-butyl moiety, showed a significantly different retention behaviour in the model interaction with collagen, despite the apparently very minor structural difference. In this paper we report a comprehensive study of the structural, thermodynamic, kinetic and relaxation properties of [Gd(HB-DO3A)], compared to the parent [Gd(HP-DO3A)] and to other closely related macrocyclic GBCAs to assess whether very minor structural changes can modulate the physico-chemical properties of Gd3+ complexes.
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Affiliation(s)
- Silvia Versolatto
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste, Piazzale Europa 1, 34127, Trieste, TS, Italy
| | - Mariangela Boccalon
- Bracco Imaging Spa, CRB Trieste, AREA Science Park, 34149, Basovizza, TS, Italy
| | - Nicol Guidolin
- Bracco Imaging Spa, CRB Trieste, AREA Science Park, 34149, Basovizza, TS, Italy
| | - Fabio Travagin
- Dipartimento di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, Novara, NO, 28100, Italy
| | - Enzo Alessio
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste, Piazzale Europa 1, 34127, Trieste, TS, Italy
| | - Silvio Aime
- IRCCS SDN Research Institute Diagnostics and Nuclear SynLab, Via Emanuele Gianturco, 113, 80143, Napoli, NA, Italy
| | - Gabriele Balducci
- Dipartimento di Scienze Chimiche e Farmaceutiche Università di Trieste, Piazzale Europa 1, 34127, Trieste, TS, Italy
| | - Giovanni B Giovenzana
- Dipartimento di Scienze del Farmaco, Università del Piemonte Orientale, Largo Donegani 2/3, Novara, NO, 28100, Italy
| | - Zsolt Baranyai
- Bracco Imaging Spa, CRB Trieste, AREA Science Park, 34149, Basovizza, TS, Italy
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2
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Paranawithana NN, Chiaffarelli R, Kretschmer J, Buchanan E, Lopez K, Zhao P, Kiefer G, Jurek P, Martins AF, Sherry AD. Enhancing r1 Relaxivity in GdDOTA-Monoamide Complexes through Polar Group-Mediated Ordering of Second-Sphere Water Molecules. Inorg Chem 2024; 63:4072-4077. [PMID: 38385753 DOI: 10.1021/acs.inorgchem.3c03639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
This study was designed to test whether the single appended phosphonate group in GdDOTA-1AmP is sufficient for catalyzing the exchange of proton from the single inner-sphere water-exchanging molecule. Unlike the other phosphonate derivatives in this series, GdDOTA-1AmP showed a surprisingly smooth increase in r1 relaxivity from 3.0 to 6.3 mM-1 s-1 at 20 MHz as the pH was lowered from 9 to 2.5. In comparison to the bis-, tris-, and tetrakis-phosphonate analogues, which all show a biphasic dependence of r1 with changes in pH, the unique r1 versus pH characteristics of GdDOTA-1AmP are shown to closely parallel deprotonation of the single appended phosphonate group. Although the tissue biodistribution and clearance rates of GdDOTA-1AmP are more favorable than the other more highly charged phosphonate derivatives, the pH dependency of r1 is substantially reduced at magnetic fields typically used for small animal imaging (7 and 9.4T), so the attractiveness of this new molecule for quantitative imaging of tissue pH is diminished. However, this study provides some new insights into the feasibility of designing pH-responsive MRI contrast agents based upon fundamental acid-base prototropic mechanisms.
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Affiliation(s)
- Namini N Paranawithana
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Remy Chiaffarelli
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Jan Kretschmer
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
| | - Emily Buchanan
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Katherine Lopez
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Piyu Zhao
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Garry Kiefer
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - Paul Jurek
- Macrocyclics, Inc., An Orano Med Company, 700 Klein Road, Plano, Texas 75074, United States
| | - André F Martins
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Werner Siemens Imaging Center, Department of Preclinical Imaging and Radiopharmacy, Eberhard Karls University of Tübingen, Tübingen 72076, Germany
- Cluster of Excellence iFIT (EXC 2180) "Image-Guided and Functionally Instructed Tumor Therapies″, University of Tübingen, Tübingen 72076, Germany
- German Cancer Consortium (DKTK), partner site Tübingen, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, Heidelberg 69120, Germany
- Advanced Imaging Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
| | - A Dean Sherry
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080, United States
- Advanced Imaging Research Center, The University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390, United States
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3
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Stefania R, Palagi L, Di Gregorio E, Ferrauto G, Dinatale V, Aime S, Gianolio E. Seeking for Innovation with Magnetic Resonance Imaging Paramagnetic Contrast Agents: Relaxation Enhancement via Weak and Dynamic Electrostatic Interactions with Positively Charged Groups on Endogenous Macromolecules. J Am Chem Soc 2024; 146:134-144. [PMID: 38152996 PMCID: PMC10785807 DOI: 10.1021/jacs.3c06275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 12/29/2023]
Abstract
Gd-L1 is a macrocyclic Gd-HPDO3A derivative functionalized with a short spacer to a trisulfonated pyrene. When compared to Gd-HPDO3A, the increased relaxivity appears to be determined by both the higher molecular weight and the occurrence of an intramolecularly catalyzed prototropic exchange of the coordinated OH moiety. In water, Gd-L1 displayed a relaxivity of 7.1 mM-1 s-1 (at 298 K and 0.5 T), slightly increasing with the concentration likely due to the onset of intermolecular aggregation. A remarkably high and concentration-dependent relaxivity was measured in human serum (up to 26.5 mM-1 s-1 at the lowest tested concentration of 0.005 mM). The acquisition of 1H-nuclear magnetic relaxation dispersion (NMRD) and 17O-R2 vs T profiles allowed to get an in-depth characterization of the system. In vitro experiments in the presence of human serum albumin, γ-globulins, and polylysine, as well as using media mimicking the extracellular matrix, provided strong support to the view that the trisulfonated pyrene fosters binding interactions with the exposed positive groups on the surface of proteins, responsible for a remarkable in vivo hyperintensity in T1w MR images. The in vivo MR images of the liver, kidneys, and spleen showed a marked contrast enhancement in the first 10 min after the i.v. injection of Gd-L1, which was 2-6-fold higher than that for Gd-HPDO3A, while maintaining a very similar excretion behavior. These findings may pave the way to an improved design of MRI GBCAs, for the first time, based on the setup of weak and dynamic interactions with abundant positive groups on serum and ECM proteins.
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Affiliation(s)
- Rachele Stefania
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
- Department
of Science and Technological Innovation, University of Eastern Piedmont, Alessandria 15120, Italy
| | - Lorenzo Palagi
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
| | - Enza Di Gregorio
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
| | - Giuseppe Ferrauto
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
| | - Valentina Dinatale
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
| | | | - Eliana Gianolio
- Department
of Molecular Biotechnology and Health Sciences, University of Torino, Torino 10126, Italy
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4
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Bu N, Gao Y, Zhao Y, Xia H, Shi X, Deng Y, Wang S, Li Y, Lv J, Liu Q, Wang S. LncRNA H19 via miR-29a-3p is involved in lung inflammation and pulmonary fibrosis induced by neodymium oxide. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 247:114173. [PMID: 36326553 DOI: 10.1016/j.ecoenv.2022.114173] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/02/2022] [Accepted: 10/07/2022] [Indexed: 06/16/2023]
Abstract
The occupational and environmental health safety of rare earths has attracted considerable attention. In China, the rare earth neodymium oxide (Nd2O3) is extensively refined and utilized. However, the mechanisms of Nd2O3-induced lung injury are elusive. In the present study, we found that exposure of mice to Nd2O3 caused an inflammatory reaction and fibrosis in lung tissues, which was in relation to the Nd2O3-induced higher levels of the lncRNA H19 (H19), tumor necrosis factor receptor 1 (TNFRSF1A), p-p65, and p-IKKβ and lower levels of miR-29a-3p. Further, in mouse monocyte macrophage leukemia cells (RAW264.7), Nd2O3 induced an inflammatory reaction, increases of H19 and TNFRSF1A levels, decreases of miR-29a-3p levels, and activation of the nuclear factor (NF)-κB signaling pathway. Further, we established that miR-29a-3p regulates TNFRSF1A expression. Up-regulation of miR-29a-3p and down-regulation of H19 blocked the Nd2O3-induced secretion of TNF-α, MIP-1α, and IL-6; the increases of TNFRSF1A levels; and activation of the NF-κB signaling pathway in RAW264.7 cells. Further, in Nd2O3-treated RAW26.4 cells, H19 inhibited the expression of miR-29a-3p, which targets TNFRSF1A, and activated the NF-κB signaling pathway to enhance the expression of TNF-α, MIP-1α, and IL-6. Moreover, for mice, up-regulation of miR-29a-3p reversed lung tissue inflammation, pulmonary fibrosis, and activation of the NF-κB signaling pathway induced by Nd2O3. In sum, the present investigation shows that H19 via miR-29a-3p is involved in lung inflammation and pulmonary fibrosis induced by Nd2O3, which is a mechanism for the Nd2O3-induced lung inflammatory response and pulmonary fibrosis. This information is useful for development of a biomarker of Nd2O3-induced lung injury.
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Affiliation(s)
- Ning Bu
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Yanrong Gao
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Yuhang Zhao
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Haibo Xia
- Center for Global Health, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, PR China
| | - Xuemin Shi
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Yang Deng
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Shurui Wang
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Yibo Li
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Jialing Lv
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China
| | - Qizhan Liu
- Center for Global Health, The Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, PR China.
| | - Suhua Wang
- School of Public Health, Baotou Medical College, Baotou 014030, Inner Mongolia, PR China.
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5
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Mallik R, Khannam M, Saha M, Marandi S, Kumar S, Mukherjee C. The electrostatic confinement of aquated monocationic Gd(III) complex-molecules within the inner core of porous silica nanoparticles creates a highly efficient T1 contrast agent for magnetic resonance imaging. Dalton Trans 2022; 51:14138-14149. [PMID: 36043989 DOI: 10.1039/d2dt02272a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Contrast-agent enhanced magnetic resonance imaging (MRI) has been under continuous investigation for the conspicuous imaging of lesions and the early-stage detection of tumors. To achieve the development of a T1-weighted contrast agent with a high relaxivity value, herein, porous silica nanoparticles that had internalized about 20 aquated cationic Gd(III) complexes (1) of the hexadentate hydroxyethyl-appended picolinate-based ligand H2hbda were demonstrated. Complex 1 exhibited a longitudinal relaxivity value per mM Gd(III) ions, r1, of 9.05 mM-1 s-1 (pH 7.4, 37 °C, 1.41 T), which increased to 86.41 mM-1 s-1 because of the grafting of complex 1 in the inner core of porous silica nanospheres through electrostatic interactions between the anionic silica surface and the cationic complex 1 molecules. A further augmentation in the relaxivity value to 118.32 mM-1 s-1 was realized because of the interaction of the complex 1@SiO2NPs with serum albumin protein. The synthesized nanosystem was impervious to physiologically available anions (HPO42- and HCO31-) and also kinetically inert, as evidenced via a transmetallation experiment in the presence of Zn(II) ions. The developed complex-incorporated nanomaterial was bio- and hemo-compatible. Cellular uptake measurements employing HeLa cells and the concentration-dependent enhancement in the brightness of in vitro phantom images, recorded under a clinical scanner at 1.5 T, demonstrated that the developed biocompatible 1@SiO2NP complex has promising diagnostic applications as a T1-weighted MRI contrast agent.
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Affiliation(s)
- Riya Mallik
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Mahmuda Khannam
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Muktashree Saha
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Shivani Marandi
- Centre for the Environment, Indian Institute of Technology Guwahati, Assam-781039, India
| | - Sachin Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Chandan Mukherjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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6
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How the catalysis of the prototropic exchange affects the properties of lanthanide(III) complexes in their applications as MRI contrast agents. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120730] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Karbalaei S, Goldsmith CR. Recent advances in the preclinical development of responsive MRI contrast agents capable of detecting hydrogen peroxide. J Inorg Biochem 2022; 230:111763. [DOI: 10.1016/j.jinorgbio.2022.111763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/07/2022] [Accepted: 02/09/2022] [Indexed: 01/10/2023]
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8
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Mallik R, Saha M, Mukherjee C. Porous Silica Nanospheres with a Confined Mono(aquated) Mn(II)-Complex: A Potential T1- T2 Dual Contrast Agent for Magnetic Resonance Imaging. ACS APPLIED BIO MATERIALS 2021; 4:8356-8367. [PMID: 35005912 DOI: 10.1021/acsabm.1c00937] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Magnetic resonance imaging has emerged as an indispensable imaging modality for the early-stage diagnosis of many diseases. The imaging in the presence of a contrast agent is always advantageous, as it mitigates the low-sensitivity issue of the measurements and provides excellent contrast in the acquired images even in a short acquisition time. However, the stability and high relaxivity of the contrast agents remained a challenge. Here, molecules of a mononuclear, mono(aquated), thermodynamically stable [log KMnL = 14.80(7) and pMn = 8.97] Mn(II)-complex (1), based on a hexadentate pyridine-picolinate unit-containing ligand (H2PyDPA), were confined within a porous silica nanosphere in a noncovalent fashion to render a stable nanosystem, complex 1@SiO2NP. The entrapped complex 1 (complex 1@SiO2) exhibited r1 = 8.46 mM-1 s-1 and r2 = 33.15 mM-1 s-1 at pH = 7.4, 25 °C, and 1.41 T in N-(2-hydroxyethyl)piperazine-N'-ethanesulfonic acid buffer. The values were about 2.9 times higher compared to the free (unentrapped)-complex 1 molecules. The synthesized complex 1@SiO2NP interacted significantly with albumin protein and consequently boosted both the relaxivity values to r1 = 24.76 mM-1 s-1 and r2 = 63.96 mM-1 s-1 at pH = 7.4, 37 °C, and 1.41 T. The kinetic inertness of the entrapped molecules was established by recognizing no appreciable change in the r1 value upon challenging complex 1@SiO2NP with 30 and 40 times excess of Zn(II) ions at pH 6 and 25 °C. The water molecule coordinated to the Mn(II) ion in complex 1@SiO2 was also impervious to the physiologically relevant anions (bicarbonate, biphosphate, and citrate) and pH of the medium. Thus, it ensured the availability of the inner-coordination site of complex 1 for the coordination of water molecules in the biological media. The concentration-dependent changes in image intensities in T1- and T2-weighted phantom images and uptake of the nanoparticles by the HeLa cell put forward the biocompatible complex 1@SiO2NP as a potential dual-mode MRI contrast agent, an alternative to Gd(III)-containing contrast agents.
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Affiliation(s)
- Riya Mallik
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Muktashree Saha
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Chandan Mukherjee
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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9
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Kras EA, Abozeid SM, Eduardo W, Spernyak JA, Morrow JR. Comparison of phosphonate, hydroxypropyl and carboxylate pendants in Fe(III) macrocyclic complexes as MRI contrast agents. J Inorg Biochem 2021; 225:111594. [PMID: 34517167 PMCID: PMC9124524 DOI: 10.1016/j.jinorgbio.2021.111594] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/09/2021] [Accepted: 08/22/2021] [Indexed: 12/11/2022]
Abstract
Fe(III) macrocyclic complexes containing a macrocycle and three pendant groups including phosphonate (NOTP =1,4,7-triazacyclononane-1,4,7-triyl-tris(methylenephosphonic acid), carboxylate (NOTA = 1,4,7 - triazacyclononane - N,N',N″ - triacetate) or hydroxypropyl (NOHP =(2S,2'S,2"S)-1,1',1″-(1,4,7-triazonane-1,4,7-triyl)tris(propan-2-ol)) were studied in order to compare the effect of these donor groups on solution chemistry and water proton relaxivity. All three complexes, Fe(NOTP), Fe(NOHP) and Fe(NOTA), display a large degree of kinetic inertness to dissociation in the presence of phosphate and carbonate, under acidic conditions of 100 mM HCl or 1 M HCl or to trans-metalation with Zn(II). The r1 proton relaxivity of the complexes at 1.4 T, 33 °C is compared over the pH range of 1 to 10. At pH 7.4, 33 °C, 1.4 T, Fe(NOHP) has the largest relaxivity (1.5 mM-1 s-1), Fe(NOTP) is second at 1.0 mM-1 s-1, whereas Fe(NOTA) is the lowest at 0.61 mM-1 s-1. Fe(NOTP), Fe(NOHP) and Fe(NOTA) all show an increase in relaxivity at very acidic pH values (< 3) that is consistent with an acid-catalyzed process. Variable temperature 17O NMR studies at near neutral pH are consistent with the absence of an inner-sphere water molecule for Fe(NOTP) and Fe(NOHP), supporting second-sphere or outer-sphere water contributions to proton relaxation. Fe(NOTP) shows contrast enhancement in T1 weighted MRI studies in mice and clears through a renal pathway.
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Affiliation(s)
- Elizabeth A Kras
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America
| | - Samira M Abozeid
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America; Department of Chemistry, Faculty of Science, Mansoura University, El-Gomhoria Street, 35516 Mansoura, Egypt
| | - Waldine Eduardo
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America
| | - Joseph A Spernyak
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Institute, Buffalo, New York 14263, United States of America
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America.
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10
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Abozeid SM, Chowdhury MSI, Asik D, Spernyak JA, Morrow JR. Liposomal Fe(III) Macrocyclic Complexes with Hydroxypropyl Pendants as MRI Probes. ACS APPLIED BIO MATERIALS 2021; 4:7951-7960. [PMID: 35006776 DOI: 10.1021/acsabm.1c00879] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Paramagnetic liposomes containing Fe(III) complexes were prepared by incorporation of mononuclear (Fe(L1) or Fe(L3)) or dinuclear (Fe2(L2)) coordination complexes of 1,4,7-triazacyclononane macrocycles containing 2-hydroxypropyl pendant groups. Two different types of paramagnetic liposomes were prepared. The first type, LipoA, has the mononuclear Fe(L1) complex loaded into the internal aqueous core. The second type, LipoB, has the amphiphilic Fe(L3) complex inserted into the liposomal bilayer and the internal aqueous core loaded with either Fe(L1) (LipoB1) or Fe2(L2) (LipoB2). LipoA enhances both T1 and T2 water proton relaxation rates. Treatment of LipoA with osmotic gradients to produce a nonspherical liposome produces a liposome with a chemical exchange saturation transfer effect as shown by an asymmetry analysis but only at high osmolarity. LipoB1, which contains an amphiphilic complex in the liposomal bilayer, produced a broadened Z-spectrum upon treatment of the liposome with osmotic gradients. The r1 relaxivity of LipoB1 and LipoB2 were higher than the r1 relaxivity of LipoA on a per Fe basis, suggesting an important contribution from the amphiphilic Fe(III) center. The r1 relaxivities of paramagnetic liposomes are relatively constant over a range of magnetic field strengths (1.4-9.4 T), with the ratio of r2/r1 substantially increasing at high field strengths. MRI studies of LipoB1 in mice showed prolonged contrast enhancement in blood compared to the clinically employed Gd(DOTA), which was injected at a 2-fold higher dose per metal than the Fe(III)-loaded liposomes.
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Affiliation(s)
- Samira M Abozeid
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States.,Department of Chemistry, Faculty of Science, Mansoura University, El-Gomhoria Street, 35516 Mansoura, Egypt
| | - Md Saiful I Chowdhury
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Didar Asik
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
| | - Joseph A Spernyak
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, New York 14263, United States
| | - Janet R Morrow
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, New York 14260, United States
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11
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Boccalon M, Leone L, Marino G, Demitri N, Baranyai Z, Tei L. Underlining the Importance of Peripheral Protic Functional Groups to Enhance the Proton Exchange of Gd-Based MRI Contrast Agents. Inorg Chem 2021; 60:13626-13636. [PMID: 34387463 PMCID: PMC8769378 DOI: 10.1021/acs.inorgchem.1c01927] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
![]()
In
this study, we report the synthesis and the equilibrium, kinetic,
relaxation, and structural properties of two new GdIII complexes
based on modified 10-(2-hydroxypropyl)-1,4,7,10-tetraazacyclododecane-1,4,7-triacetic
acid (HPDO3A) designed to modulate the relaxivity at acidic and basic
pH due to intra- and intermolecular proton exchange. The presence
of a carboxylic or ester moieties in place of the methyl group of
HPDO3A allowed differentiation of a protic and nonprotic functional
group, highlighting the importance of the formation of an intramolecular
hydrogen bond between the coordinated hydroxyl and the carboxylate
groups for proton exchange (kH = 1.5 ×
1011 M–1 s–1, kOH = 1.7 × 109 M–1 s–1). The determination of the thermodynamic stability
and kinetic inertness of the GdIII complexes confirmed
that the modification of peripheral groups does not significantly
affect the coordination environment and thus the stability (log KGdL = 19.26, t1/2 = 2.14 × 107 hours, pH = 7.4, 0.15 M NaCl, 25 °C).
The relaxivity (r1) was measured as a
function of pH to investigate the proton exchange kinetics, and as
a function of the magnetic field strength to extrapolate the relaxometric
parameters (r1GdL1 = 4.7 mM–1 s–1 and r1GdL2 = 5.1 mM–1 s–1 at 20 MHz, 25 °C, and pH 7.4). Finally, the X-ray crystal structure
of the complex crystallized at basic pH showed the formation of a
tetranuclear dimer with alkoxide and hydroxide groups bridging the
GdIII ions. The peripheral
carboxylic moiety of a 2-hydroxypropanoic
pendant arm of a GdHPDO3A-like complex forms an intramolecular hydrogen
bond with the −OH group that allows both acid- and base-catalyzed
proton exchange and thus a relaxivity enhancement. Conversely, the
nonprotic ester group in the same position permits only the base-catalyzed
mechanism.
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Affiliation(s)
- Mariangela Boccalon
- Bracco Research Centre, Bracco Imaging S.p.A., Via Ribes 5, 10010 Colleretto Giacosa, Italy
| | - Loredana Leone
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro", Viale T. Michel 11, 15121 Alessandria, Italy
| | - Giuseppe Marino
- Bracco Research Centre, Bracco Imaging S.p.A., Via Ribes 5, 10010 Colleretto Giacosa, Italy
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, Basovizza, 34149 Trieste, Italy
| | - 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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12
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Guidolin N, Travagin F, Giovenzana GB, Vágner A, Lotti S, Chianale F, Brücher E, Maisano F, Kirchin MA, Tedoldi F, Giorgini A, Colombo Serra S, Baranyai Z. Interaction of macrocyclic gadolinium-based MR contrast agents with Type I collagen. Equilibrium and kinetic studies. Dalton Trans 2021; 49:14863-14870. [PMID: 33073806 DOI: 10.1039/d0dt03314f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The interactions of gadoterate meglumine, gadobutrol, gadoteridol and Gd(HB-DO3A) with bovine Type I collagen were investigated by ultrafiltration and dialysis. The affinity of the four agents to collagen is similar. However, the maximum adsorbed amount of GdIII-complexes decreases in the following order: gadoterate meglumine > gadobutrol > gadoteridol > Gd(HB-DO3A). Calculations with the open three-compartment model reveal that the structural homologs gadoteridol and Gd(HB-DO3A) have a lower adsorption onto collagen, which may explain the less prolonged in vivo retention of gadoteridol observed in soft tissues of rats.
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Affiliation(s)
- Nicol Guidolin
- Bracco Imaging Spa, Bracco Research Centre, Via Ribes 5, 10010 Colleretto Giacosa (TO), Italy.
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13
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Karbalaei S, Knecht E, Franke A, Zahl A, Saunders AC, Pokkuluri PR, Beyers RJ, Ivanović-Burmazović I, Goldsmith CR. A Macrocyclic Ligand Framework That Improves Both the Stability and T1-Weighted MRI Response of Quinol-Containing H 2O 2 Sensors. Inorg Chem 2021; 60:8368-8379. [PMID: 34042423 DOI: 10.1021/acs.inorgchem.1c00896] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Previously prepared Mn(II)- and quinol-containing magnetic resonance imaging (MRI) contrast agent sensors for H2O2 relied on linear polydentate ligands to keep the redox-activatable quinols in close proximity to the manganese. Although these provide positive T1-weighted relaxivity responses to H2O2 that result from oxidation of the quinol groups to p-quinones, these reactions weaken the binding affinity of the ligands, promoting dissociation of Mn(II) from the contrast agent in aqueous solution. Here, we report a new ligand, 1,8-bis(2,5-dihydroxybenzyl)-1,4,8,11-tetraazacyclotetradecane, that consists of two quinols covalently tethered to a cyclam macrocycle. The macrocycle provides stronger thermodynamic and kinetic barriers for metal-ion dissociation in both the reduced and oxidized forms of the ligand. The Mn(II) complex reacts with H2O2 to produce a more highly aquated Mn(II) species that exhibits a 130% greater r1, quadrupling the percentile response of our next best sensor. With a large excess of H2O2, there is a noticeable induction period before quinol oxidation and r1 enhancement occurs. Further investigation reveals that, under such conditions, catalase activity initially outcompetes ligand oxidation, with the latter occurring only after most of the H2O2 has been depleted.
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Affiliation(s)
- Sana Karbalaei
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Erik Knecht
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Alicja Franke
- Department of Chemistry, Ludwig-Maximilians-Universität München. Butenandtstrasse 5-13, Haus D 81377 München, Germany
| | - Achim Zahl
- Department of Chemistry and Pharmacy, Friedrich-Alexander University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Alexander C Saunders
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - P Raj Pokkuluri
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ronald J Beyers
- Magnetic Resonance Imaging Research Center, Auburn University, Auburn, Alabama 36849, United States
| | - Ivana Ivanović-Burmazović
- Department of Chemistry, Ludwig-Maximilians-Universität München. Butenandtstrasse 5-13, Haus D 81377 München, Germany
| | - Christian R Goldsmith
- Department of Chemistry and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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14
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Asik D, Abozeid SM, Turowski SG, Spernyak JA, Morrow JR. Dinuclear Fe(III) Hydroxypropyl-Appended Macrocyclic Complexes as MRI Probes. Inorg Chem 2021; 60:8651-8664. [PMID: 34110140 PMCID: PMC9942924 DOI: 10.1021/acs.inorgchem.1c00634] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Four high-spin Fe(III) macrocyclic complexes, including three dinuclear and one mononuclear complex, were prepared toward the development of more effective iron-based magnetic resonance imaging (MRI) contrast agents. All four complexes contain a 1,4,7-triazacyclononane macrocyclic backbone with two hydroxypropyl pendant groups, an ancillary aryl or biphenyl group, and a coordination site for a water ligand. The pH potentiometric titrations support one or two deprotonations of the complexes, most likely deprotonation of hydroxypropyl groups at near-neutral pH. Variable-temperature 17O NMR studies suggest that the inner-sphere water ligand is slow to exchange with bulk water on the NMR time scale. Water proton T1 relaxation times measured for solutions of the Fe(III) complexes at pH 7.2 showed that the dinuclear complexes have a 2- to 3-fold increase in r1 relaxivity in comparison to the mononuclear complex per molecule at field strengths ranging from 1.4 T to 9.4 T. The most effective agent, a dinuclear complex with macrocycles linked through para-substitution of an aryl group (Fe2(PARA)), has an r1 of 6.7 mM-1 s-1 at 37 °C and 4.7 T or 3.3 mM-1 s-1 per iron center in the presence of serum albumin and shows enhanced blood pool and kidney contrast in mice MRI studies.
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Affiliation(s)
- Didar Asik
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Samira M. Abozeid
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, New York 14260, United States
| | - Steven G. Turowski
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, New York 14263 United States
| | - Joseph A. Spernyak
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, New York 14263 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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15
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Tei L, Gugliotta G, Marchi D, Cossi M, Geninatti Crich S, Botta M. Optimizing the relaxivity at high fields: systematic variation of the rotational dynamics in polynuclear Gd-complexes based on the AAZTA ligand. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00904d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A homogeneous series of polynuclear Gd-complexes (n = 1–8) based on a stable and bis-hydrated [Gd(AAZTA)]− chelate shows high relaxivity values at high fields (1.5–7 T), per Gd, particularly pronounced for the more rigid and compact members.
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Affiliation(s)
- Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica and Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121, Alessandria, Italy
| | - Giuseppe Gugliotta
- Dipartimento di Scienze e Innovazione Tecnologica and Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121, Alessandria, Italy
| | - Davide Marchi
- Dipartimento di Scienze e Innovazione Tecnologica and Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121, Alessandria, Italy
| | - Maurizio Cossi
- Dipartimento di Scienze e Innovazione Tecnologica and Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121, Alessandria, Italy
| | - Simonetta Geninatti Crich
- Department of Molecular Biotechnology and Health Sciences and Molecular Imaging Center, Università di Torino, Via Nizza 52, 10126 Torino, Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica and Magnetic Resonance Platform (PRISMA-UPO), Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, I-15121, Alessandria, Italy
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16
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Lattuada L, Horváth D, Colombo Serra S, Fringuello Mingo A, Minazzi P, Bényei A, Forgács A, Fedeli F, Gianolio E, Aime S, Giovenzana GB, Baranyai Z. Enhanced relaxivity of GdIII-complexes with HP-DO3A-like ligands upon the activation of the intramolecular catalysis of the prototropic exchange. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01333a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The simple modification of the hydroxypropyl arm in Gd(HP-DO3A) complex allows to achieve an increased relaxivity by the activation of the intramolecular catalysis of the proton exchange process.
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Affiliation(s)
| | - Dávid Horváth
- Department of Physical Chemistry
- University of Debrecen
- Debrecen, Egyetem tér 1
- Hungary
| | | | | | | | - Attila Bényei
- Department of Physical Chemistry
- University of Debrecen
- Debrecen, Egyetem tér 1
- Hungary
| | - Attila Forgács
- MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group
- Debrecen
- Hungary
| | | | - Eliana Gianolio
- Department of Molecular Biotechnologies and Health Science
- University of Turin
- Turin
- Italy
| | - Silvio Aime
- Department of Molecular Biotechnologies and Health Science
- University of Turin
- Turin
- Italy
| | - Giovanni B. Giovenzana
- CAGE Chemicals
- 28100 Novara
- Italy
- Dipartimento di Scienze del Farmaco
- Università del Piemonte Orientale
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17
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Leone L, Boccalon M, Ferrauto G, Fábián I, Baranyai Z, Tei L. Acid-catalyzed proton exchange as a novel approach for relaxivity enhancement in Gd-HPDO3A-like complexes. Chem Sci 2020; 11:7829-7835. [PMID: 34123071 PMCID: PMC8163333 DOI: 10.1039/d0sc02174a] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
A current challenge in medical diagnostics is how to obtain high MRI relaxation enhancement using GdIII-based contrast agents (CAs) containing the minimum concentration of GdIII ions. We report that in GdHPDO3A-like complexes a primary amide group located in close proximity to the coordinated hydroxyl group can provide a strong relaxivity enhancement at slightly acidic pH. A maximum relaxivity of r1 = 9.8 mM−1 s−1 (20 MHz, 298 K) at acidic pH was achieved, which is more than double that of clinically approved MRI contrast agents under identical conditions. This effect was found to strongly depend on the number of amide protons, i.e. it decreases with a secondary amide group and almost completely vanishes with a tertiary amide. This relaxivity enhancement is attributed to an acid-catalyzed proton exchange process between the metal-coordinated OH group, the amide protons and second sphere water molecules. The mechanism and kinetics of the corresponding H+ assisted exchange process are discussed in detail and a novel simultaneous double-site proton exchange mechanism is proposed. Furthermore, 1H and 17O NMR relaxometry, Chemical Exchange Saturation Transfer (CEST) on the corresponding EuIII complexes, and thermodynamic and kinetic studies are reported. These highlight the optimal physico-chemical properties required to achieve high relaxivity with this series of GdIII-complexes. Thus, proton exchange provides an important opportunity to enhance the relaxivity of contrast agents, providing that labile protons close to the paramagnetic center can contribute. A novel GdHPDO3A-like complex featuring primary amide side chain induces extraordinary high relaxivity by virtue of a simultaneous double-site proton exchange mechanism under slight acidic conditions.![]()
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Affiliation(s)
- Loredana Leone
- Department of Science and Technological Innovation, Università del Piemonte Orientale Viale T. Michel 11 15121 Alessandria Italy
| | - Mariangela Boccalon
- Bracco Imaging SpA, Bracco Research Center Via Ribes 5 10010 Colleretto Giacosa TO Italy
| | - Giuseppe Ferrauto
- Department of Molecular Biotechnology and Health Science, University of Turin Via Nizza 52 10126 Torino Italy
| | - István Fábián
- Department of Inorganic and Analytical Chemistry, MTA-DE Redox and Homogeneous Catalytic Reaction Mechanisms Research Group, University of Debrecen Egyetem tér 1. H-4032 Debrecen Hungary
| | - Zsolt Baranyai
- Bracco Imaging SpA, Bracco Research Center Via Ribes 5 10010 Colleretto Giacosa TO Italy
| | - Lorenzo Tei
- Department of Science and Technological Innovation, Università del Piemonte Orientale Viale T. Michel 11 15121 Alessandria Italy
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18
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Tear LR, Carrera C, Gianolio E, Aime S. Towards an Improved Design of MRI Contrast Agents: Synthesis and Relaxometric Characterisation of Gd-HPDO3A Analogues. Chemistry 2020; 26:6056-6063. [PMID: 32133687 DOI: 10.1002/chem.202000479] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 03/02/2020] [Indexed: 11/10/2022]
Abstract
The properties of LnIII -HPDO3A complexes as relaxation enhancers and paraCEST agents are essentially related to the hydroxylpropyl moiety. A series of three HPDO3A derivatives, with small modifications to the hydroxyl arm, were herein investigated to understand how heightened control can be gained over the parameters involved in the design of these agents. A full 1 H and 17 O-NMR relaxometric analysis was conducted and demonstrated that increasing the length of the OH group from the lanthanide centre significantly enhanced the water exchange rate of the gadolinium complex, but with a subsequent reduction in kinetic stability. Alternatively, the introduction of an additional methyl group, which increased the steric bulk around the OH moiety, resulted in the formation of almost exclusively the TSAP isomer (95 %) as identified by 1 H-NMR of the europium complex. The gadolinium analogue of this complex also exhibited a very fast water exchange rate, but with no detectable loss of kinetic stability. This complex therefore demonstrates a notable improvement over Gd-HPDO3A.
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Affiliation(s)
- Louise R Tear
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Carla Carrera
- Institute of Biostructures and Bioimaging, National Research Council, Via Nizza 52, 10126, Torino, Italy
| | - Eliana Gianolio
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Torino, Italy
| | - Silvio Aime
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Via Nizza 52, 10126, Torino, Italy
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19
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Patel A, Asik D, Spernyak JA, Cullen PJ, Morrow JR. MRI and fluorescence studies of Saccharomyces cerevisiae loaded with a bimodal Fe(III) T 1 contrast agent. J Inorg Biochem 2019; 201:110832. [PMID: 31522137 PMCID: PMC6859208 DOI: 10.1016/j.jinorgbio.2019.110832] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 09/03/2019] [Accepted: 09/05/2019] [Indexed: 12/30/2022]
Abstract
Labeling of cells with paramagnetic metal complexes produces changes in MRI properties that have applications in cell tracking and identification. Here we show that fungi, specifically the budding yeast Saccharomyces cerevisiae, can be loaded with Fe(III) T1 contrast agents. Two Fe(III) macrocyclic complexes based on 1,4,7-triazacyclononane, with two pendant alcohol groups are prepared and studied as T1 relaxation MRI probes. To better visualize uptake and localization in the yeast cells, Fe(III) complexes have a fluorescent tag, consisting of either carbostyril or fluoromethyl coumarin. The Fe(III) complexes are robust towards dissociation and produce moderate T1 effects, despite lacking inner-sphere water ligands. Fluorescence microscopy and MRI T1 relaxation studies provide evidence of uptake of an Fe(III) complex into Saccharomyces cerevisiae upon electroporation.
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Affiliation(s)
- Akanksha Patel
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America
| | - Didar Asik
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America
| | - Joseph A Spernyak
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Institute, Buffalo, NY 14263, United States of America
| | - Paul J Cullen
- Department of Biological Sciences, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America
| | - Janet R Morrow
- Department of Chemistry, University at Buffalo, State University of New York, Amherst, NY 14260, United States of America.
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20
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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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21
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Khannam M, Sahoo SK, Mukherjee C. Effect of Ligand Chirality and Hyperconjugation on the Thermodynamic Stability of a Tris(aquated) GdIII
Complex: Synthesis, Characterization, and T
1
-Weighted Phantom MR Image Study. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mahmuda Khannam
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
| | - Suban K. Sahoo
- Department of Applied Chemistry; S.V. National Institute of Technology; 395007 Surat Gujarat India
| | - Chandan Mukherjee
- Department of Chemistry; Indian Institute of Technology Guwahati; 781039 Guwahati Assam India
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22
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Phukan B, Malikidogo KP, Bonnet CS, Tóth É, Mondal S, Mukherjee C. A Bishydrated, Eight–Coordinate Gd(III) Complex with Very Fast Water Exchange: Synthesis, Characterization, and Phantom MR Imaging. ChemistrySelect 2018. [DOI: 10.1002/slct.201801629] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bedika Phukan
- Department of ChemistryIndian Institute of Technology Guwahati, Guwahati 781039, Assam India
| | - Kyangwi P. Malikidogo
- Centre de Biophysique MoléculaireCNRS, UPR 4301Université d'Orléans, rue Charles Sadron, 45071 Orléans, France
| | - Célia S. Bonnet
- Centre de Biophysique MoléculaireCNRS, UPR 4301Université d'Orléans, rue Charles Sadron, 45071 Orléans, France
| | - Éva Tóth
- Centre de Biophysique MoléculaireCNRS, UPR 4301Université d'Orléans, rue Charles Sadron, 45071 Orléans, France
| | - Samsuzzoha Mondal
- Department of Chemical SciencesTata Institute of Fundamental Research 1 Homi Bhabha Road, Colaba, Mumbai 400005 India
| | - Chandan Mukherjee
- Department of ChemistryIndian Institute of Technology Guwahati, Guwahati 781039, Assam India
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23
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Carnovale IM, Lolli ML, Serra SC, Mingo AF, Napolitano R, Boi V, Guidolin N, Lattuada L, Tedoldi F, Baranyai Z, Aime S. Exploring the intramolecular catalysis of the proton exchange process to modulate the relaxivity of Gd(iii)-complexes of HP-DO3A-like ligands. Chem Commun (Camb) 2018; 54:10056-10059. [DOI: 10.1039/c8cc05284k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The GdIII complex of Ph-HP-DO3A shows the highest contribution to the relaxivity by the intramolecular proton exchange of the –OH group.
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Affiliation(s)
| | - Marco Lucio Lolli
- Department of Drug Science and Technology, University of Torino
- 10125 Torino
- Italy
| | - Sonia Colombo Serra
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | | | - Roberta Napolitano
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Valeria Boi
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Nicol Guidolin
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Luciano Lattuada
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Fabio Tedoldi
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Zsolt Baranyai
- Bracco Imaging Spa, Bracco Research Centre
- 10010 Colleretto Giacosa (TO)
- Italy
| | - Silvio Aime
- Department of Molecular Biotechnologies and Health Sciences
- Molecular Imaging Center, University of Torino
- 10126 Torino
- Italy
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