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Duraiyarasu M, Kumaran SS, Mayilmurugan R. Alkyl Chain Appended Fe(III) Catecholate Complex as a Dual-Modal T1 MRI-NIR Fluorescence Imaging Agent via Second Sphere Water Interactions. ACS Biomater Sci Eng 2023. [PMID: 37141045 DOI: 10.1021/acsbiomaterials.3c00203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The C12-alkyl chain-conjugated Fe(III) catecholate complex [Fe(C12CAT)3]3-, Fe(C12CAT)3 [C12CAT = N-(3,4-dihydroxyphenethyl)dodecanamide], was synthesized and characterized, reported as a dual-modal T1-MRI and an optical imaging probe. The DFT-optimized structure of Fe(C12CAT)3 reveals a distorted octahedral coordination geometry around the high spin Fe(III) center. The formation constant (-log K) of Fe(C12CAT)3 was calculated as 45.4. The complex exhibited r1-relaxivity values of 2.31 ± 0.12 and 1.52 ± 0.06 mM-1 s-1 at 25 and 37 °C, respectively, on 1.41 T at pH 7.3 via second-sphere water interactions. The interaction of Fe(C12CAT)3 with human serum albumin showed concomitant enhancement of r1-relaxivity to 6.44 ± 0.15 mM-1 s-1. The MR phantom images are significantly brighter and directly correlate to the concentration of Fe(C12CAT)3. Adding an external fluorescent marker IR780 dye to Fe(C12CAT)3 leads to the formation of self-assembly by C12-alkyl chains. It resulted in the fluorescence quenching of the dye, and its critical aggregation concentration was calculated as 70 μM. The aggregated matrix of Fe(C12CAT)3 and IR780 dye is spherical, with an average hydrodynamic diameter of 189.5 nm. This self-assembled supramolecular system is found to be non-fluorescent and was "turn-on" under acidic pH via dissociation of aggregates. The r1-relaxivity is found to be unchanged during the matrix aggregation and disaggregation. The probe showed MRI ON and fluorescent OFF under physiological conditions and MRI ON and fluorescent ON under acidic pH. The cell viability experiments showed that the cells are 80% viable at 1 mM probe concentration. Fluorescence experiments and MR phantom images showed that Fe(C12CAT)3 is a potential dual model imaging probe to visualize the acidic pH environment of the cells.
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Affiliation(s)
- Maheshwaran Duraiyarasu
- Department of Chemistry, and Department of Bioscience & Biomedical Engineering, Indian Institute of Technology Bhilai, Raipur, Chattisgarh 492015, India
| | - S Senthil Kumaran
- Department of NMR, All India Institute of Medical Sciences, Ansari Nagar, New Delhi 110 029, India
| | - Ramasamy Mayilmurugan
- Department of Chemistry, and Department of Bioscience & Biomedical Engineering, Indian Institute of Technology Bhilai, Raipur, Chattisgarh 492015, India
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Qian S, Li L, Wu K, Wang Y, Wei G, Zheng J. Emerging and Versatile Platforms of Metal-Ion-Doped Carbon Dots for Biosensing, Bioimaging, and Disease Therapy. ChemMedChem 2023; 18:e202200479. [PMID: 36250779 DOI: 10.1002/cmdc.202200479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/16/2022] [Indexed: 01/24/2023]
Abstract
Metal ions possess abundant electrons and unoccupied orbitals, as well as large atomic radii, whose doping into carbon dots (CDs) is a facile strategy to endow CDs with additional physicochemical characteristics. After being doped with metal ions, CDs reveal obvious changes in their optical, electronic, and magnetic properties by adjustments to their electron density distribution and the energy gaps, leading them to be promising and competitive candidates as labeling probes, imaging agents, catalysts, nanodrugs, and so on. In this review, we summarize the fabrication methods of metal-ion-doped CDs (M-CDs), and highlight their biological applications including biosensing, bioimaging, tumor therapy, and anti-microbial treatment. Finally, the challenging future perspectives of M-CDs are analyzed. We hope this review will provide inspiration for further development of M-CDs in various biological aspects, and help readers who are interested in M-CDs and their biological applications.
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Affiliation(s)
- Sihua Qian
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), 315300, Ningbo, P. R. China
| | - Lin Li
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), 315300, Ningbo, P. R. China
| | - Kerong Wu
- Translational Research Laboratory for Urology, Department of Urology, Ningbo First Hospital, 315010, Ningbo, P. R. China
| | - Yuhui Wang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), 315300, Ningbo, P. R. China
| | - Gang Wei
- College of Chemistry and Chemical Engineering, Qingdao University, 266071, Qingdao, P. R. China
| | - Jianping Zheng
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences (CAS), 315300, Ningbo, P. R. China
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Pothayee N, Sail D, Dodd S, Swenson RE, Koretsky AP. Multivalent Gd-DOTA Decorated Oligopeptide as Sensitive MRI Molecular Probes for In Vivo Imaging of Brain Connectivity. ACS Chem Neurosci 2022; 13:2674-2680. [PMID: 36040317 DOI: 10.1021/acschemneuro.2c00236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
One of the most important goals of brain imaging is to define the anatomical connections within the brain. In addition to revealing normal circuitry, studies of neural connections and neuronal transport can show rewiring and degeneration following brain injury and diseases. In this work, a highly sensitive magnetic resonance imaging (MRI)-visible neural tracer that can be used to visualize brain connectivity in vivo is developed. It is based on an oligopeptide with gadolinium chelates appended to the peptide backbone. This peptide construct is a sensitive MRI contrast agent that was conjugated to the classical neurotracer, Cholera-toxin Subunit-B. Injection of this probe enabled it to be used to trace neural connections in vivo. This complements other MRI tracing techniques such as diffusion tensor imaging and manganese-enhanced MRI for neural tracing.
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Affiliation(s)
- Nikorn Pothayee
- Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Deepak Sail
- Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Rockville, Maryland 20850, United States
| | - Stephen Dodd
- Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Rolf E Swenson
- Chemistry and Synthesis Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Rockville, Maryland 20850, United States
| | - Alan P Koretsky
- Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, United States
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Kretschmer J, David T, Dračínský M, Socha O, Jirak D, Vít M, Jurok R, Kuchař M, Císařová I, Polasek M. Paramagnetic encoding of molecules. Nat Commun 2022; 13:3179. [PMID: 35676253 PMCID: PMC9177614 DOI: 10.1038/s41467-022-30811-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 05/10/2022] [Indexed: 11/09/2022] Open
Abstract
AbstractContactless digital tags are increasingly penetrating into many areas of human activities. Digitalization of our environment requires an ever growing number of objects to be identified and tracked with machine-readable labels. Molecules offer immense potential to serve for this purpose, but our ability to write, read, and communicate molecular code with current technology remains limited. Here we show that magnetic patterns can be synthetically encoded into stable molecular scaffolds with paramagnetic lanthanide ions to write digital code into molecules and their mixtures. Owing to the directional character of magnetic susceptibility tensors, each sequence of lanthanides built into one molecule produces a unique magnetic outcome. Multiplexing of the encoded molecules provides a high number of codes that grows double-exponentially with the number of available paramagnetic ions. The codes are readable by nuclear magnetic resonance in the radiofrequency (RF) spectrum, analogously to the macroscopic technology of RF identification. A prototype molecular system capable of 16-bit (65,535 codes) encoding is presented. Future optimized systems can conceivably provide 64-bit (~10^19 codes) or higher encoding to cover the labelling needs in drug discovery, anti-counterfeiting and other areas.
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Deblonde GJP, Mattocks JA, Wang H, Gale EM, Kersting AB, Zavarin M, Cotruvo JA. Characterization of Americium and Curium Complexes with the Protein Lanmodulin: A Potential Macromolecular Mechanism for Actinide Mobility in the Environment. J Am Chem Soc 2021; 143:15769-15783. [PMID: 34542285 DOI: 10.1021/jacs.1c07103] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Anthropogenic radionuclides, including long-lived heavy actinides such as americium and curium, represent the primary long-term challenge for management of nuclear waste. The potential release of these wastes into the environment necessitates understanding their interactions with biogeochemical compounds present in nature. Here, we characterize the interactions between the heavy actinides, Am3+ and Cm3+, and the natural lanthanide-binding protein, lanmodulin (LanM). LanM is produced abundantly by methylotrophic bacteria, including Methylorubrum extorquens, that are widespread in the environment. We determine the first stability constant for an Am3+-protein complex (Am3LanM) and confirm the results with Cm3LanM, indicating a ∼5-fold higher affinity than that for lanthanides with most similar ionic radius, Nd3+ and Sm3+, and making LanM the strongest known heavy actinide-binding protein. The protein's high selectivity over 243Am's daughter nuclide 239Np enables lab-scale actinide-actinide separations as well as provides insight into potential protein-driven mobilization for these actinides in the environment. The luminescence properties of the Cm3+-LanM complex, and NMR studies of Gd3+-LanM, reveal that lanmodulin-bound f-elements possess two coordinated solvent molecules across a range of metal ionic radii. Finally, we show under a wide range of environmentally relevant conditions that lanmodulin effectively outcompetes desferrioxamine B, a hydroxamate siderophore previously proposed to be important in trivalent actinide mobility. These results suggest that natural lanthanide-binding proteins such as lanmodulin may play important roles in speciation and mobility of actinides in the environment; it also suggests that protein-based biotechnologies may provide a new frontier in actinide remediation, detection, and separations.
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Affiliation(s)
- Gauthier J-P Deblonde
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States.,Glenn T. Seaborg Institute, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Joseph A Mattocks
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Huan Wang
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, 149 Thirteenth Street, Charlestown, Massachusetts 02129, United States
| | - Eric M Gale
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, 149 Thirteenth Street, Charlestown, Massachusetts 02129, United States
| | - Annie B Kersting
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States.,Glenn T. Seaborg Institute, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Mavrik Zavarin
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550, United States.,Glenn T. Seaborg Institute, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
| | - Joseph A Cotruvo
- Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
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Complexes of Bifunctional DO3A-N-(α-amino)propinate Ligands with Mg(II), Ca(II), Cu(II), Zn(II), and Lanthanide(III) Ions: Thermodynamic Stability, Formation and Dissociation Kinetics, and Solution Dynamic NMR Studies. Molecules 2021; 26:molecules26164956. [PMID: 34443543 PMCID: PMC8398831 DOI: 10.3390/molecules26164956] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/13/2021] [Accepted: 07/15/2021] [Indexed: 02/07/2023] Open
Abstract
The thermodynamic, kinetic, and structural properties of Ln3+ complexes with the bifunctional DO3A-ACE4− ligand and its amide derivative DO3A-BACE4− (modelling the case where DO3A-ACE4− ligand binds to vector molecules) have been studied in order to confirm the usefulness of the corresponding Gd3+ complexes as relaxation labels of targeted MRI contrast agents. The stability constants of the Mg2+ and Ca2+ complexes of DO3A-ACE4− and DO3A-BACE4− complexes are lower than for DOTA4− and DO3A3−, while the Zn2+ and Cu2+ complexes have similar and higher stability than for DOTA4− and DO3A3− complexes. The stability constants of the Ln(DO3A-BACE)− complexes increase from Ce3+ to Gd3+ but remain practically constant for the late Ln3+ ions (represented by Yb3+). The stability constants of the Ln(DO3A-ACE)4− and Ln(DO3A-BACE)4− complexes are several orders of magnitude lower than those of the corresponding DOTA4− and DO3A3− complexes. The formation rate of Eu(DO3A-ACE)− is one order of magnitude slower than for Eu(DOTA)−, due to the presence of the protonated amine group, which destabilizes the protonated intermediate complex. This protonated group causes the Ln(DO3A-ACE)− complexes to dissociate several orders of magnitude faster than Ln(DOTA)− and its absence in the Ln(DO3A-BACE)− complexes results in inertness similar to Ln(DOTA)− (as judged by the rate constants of acid assisted dissociation). The 1H NMR spectra of the diamagnetic Y(DO3A-ACE)− and Y(DO3A-BACE)− reflect the slow dynamics at low temperatures of the intramolecular isomerization process between the SA pair of enantiomers, R-Λ(λλλλ) and S-Δ(δδδδ). The conformation of the Cα-substituted pendant arm is different in the two complexes, where the bulky substituent is further away from the macrocyclic ring in Y(DO3A-BACE)− than the amino group in Y(DO3A-ACE)− to minimize steric hindrance. The temperature dependence of the spectra reflects slower ring motions than pendant arms rearrangements in both complexes. Although losing some thermodynamic stability relative to Gd(DOTA)−, Gd(DO3A-BACE)− is still quite inert, indicating the usefulness of the bifunctional DO3A-ACE4− in the design of GBCAs and Ln3+-based tags for protein structural NMR analysis.
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7
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Fu S, Cai Z, Ai H. Stimulus-Responsive Nanoparticle Magnetic Resonance Imaging Contrast Agents: Design Considerations and Applications. Adv Healthc Mater 2021; 10:e2001091. [PMID: 32875751 DOI: 10.1002/adhm.202001091] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 08/04/2020] [Indexed: 02/05/2023]
Abstract
Magnetic resonance imaging (MRI) has been widely used for disease diagnosis because it can noninvasively obtain anatomical details of various diseases through accurate contrast between soft tissues. Over one-third of MRI examinations are performed with the assistance of contrast agents. Traditional contrast agents typically display an unchanging signal, thus exhibiting relatively low sensitivity and poor specificity. Currently, advances in stimulus-responsive contrast agents which can alter the relaxation signal in response to a specific change in their surrounding environment provide new opportunities to overcome such limitation. The signal changes based on stimulus also reflects the physiological and pathological conditions of the site of interests. In this review, how to design stimulus-responsive nanoparticle MRI contrast agents from the perspective of theory and surface design is comprehensively discussed. Key structural features including size, clusters, shell features, and surface properties are used for tuning the T1 and T2 relaxation properties. The reversible or non-reversible signal changes highlight the contrast agents have undergone structural changes based on certain stimulus, as an indication for disease diagnosis or therapeutic efficacy.
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Affiliation(s)
- Shengxiang Fu
- National Engineering Research Center for Biomaterials Sichuan University Chengdu 610065 China
| | - Zhongyuan Cai
- National Engineering Research Center for Biomaterials Sichuan University Chengdu 610065 China
| | - Hua Ai
- National Engineering Research Center for Biomaterials Sichuan University Chengdu 610065 China
- Department of Radiology West China Hospital Sichuan University Chengdu 610041 China
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8
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Albuquerque GM, Souza-Sobrinha I, Coiado SD, Santos BS, Fontes A, Pereira GAL, Pereira G. Quantum Dots and Gd 3+ Chelates: Advances and Challenges Towards Bimodal Nanoprobes for Magnetic Resonance and Optical Imaging. Top Curr Chem (Cham) 2021; 379:12. [PMID: 33550491 DOI: 10.1007/s41061-021-00325-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 01/15/2021] [Indexed: 10/22/2022]
Abstract
The development of multimodal nanoprobes has been growing in recent years. Among these novel nanostructures are bimodal systems based on quantum dots (QDs) and low molecular weight Gd3+ chelates, prepared for magnetic resonance imaging (MRI) and optical analyses. MRI is a technique used worldwide that provides anatomic resolution and allows distinguishing of physiological differences at tissue and organ level. On the other hand, optical techniques are very sensitive and allow events to be followed at the cellular or molecular level. Thus, the association of these two techniques has the potential to achieve a more complete comprehension of biological processes. In this review, we present state-of-the-art research concerning the development of potential multimodal optical/paramagnetic nanoprobes based on Gd3+ chelates and QDs, highlighting their preparation strategies and overall properties.
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Affiliation(s)
- Gabriela M Albuquerque
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Brazil
| | - Izabel Souza-Sobrinha
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Brazil
| | - Samantha D Coiado
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Brazil
| | - Beate S Santos
- Departamento de Ciências Farmacêuticas, Universidade Federal de Pernambuco, Recife, Brazil
| | - Adriana Fontes
- Departamento de Biofísica e Radiobiologia, Universidade Federal de Pernambuco, Recife, Brazil
| | - Giovannia A L Pereira
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Brazil.
| | - Goreti Pereira
- Departamento de Química Fundamental, CCEN, Universidade Federal de Pernambuco, Av. Jornalista Anibal Fernandes, S/N, 50740-560, Recife, Brazil.
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Nizou G, Molnár E, Hamon N, Kálmán FK, Fougère O, Rousseaux O, Esteban-Gòmez D, Platas-Iglesias C, Beyler M, Tircsó G, Tripier R. Pyclen-Based Ligands Bearing Pendant Picolinate Arms for Gadolinium Complexation. Inorg Chem 2021; 60:2390-2405. [PMID: 33486958 DOI: 10.1021/acs.inorgchem.0c03277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report the synthesis of two pyclen-based regioisomer ligands (pyclen = 3,6,9,15-tetraazabicyclo[9.3.1]pentadeca-1(15),11,13-triene) functionalized with picolinic acid pendant arms either at positions 3,9-pc2pa (L5) or 3,6-pc2pa (L6) of the macrocyclic fragment. The ligands were prepared by the regiospecific protection of one of the amine nitrogen atoms of the macrocycle using Boc and Alloc protecting groups, respectively. The X-ray structure of the Gd(III) complex of L5 contains trinuclear [(GdL5)3(H2O)3]3+ entities in which the monomeric units are joined by μ2-η1:η1-carboxylate groups. However, the 1H and 89Y NMR spectra of its Y(III) analogue support the formation of monomeric complexes in solution. The Tb(III) complexes are highly luminescent, with emission quantum yields of up to 28% for [TbL5]+. The luminescence lifetimes recorded in H2O and D2O solutions indicate the presence of a water molecule coordinated to the metal ion, as also evidenced by the 1H relaxivities measured for the Gd(III) analogues. The Gd(III) complexes present very different exchange rates of the coordinated water molecule (kex298 = 87.1 × 106 and 1.06 × 106 s-1 for [GdL5]+ and [GdL6]+, respectively). The very high water exchange rate of [GdL5]+ is associated with the steric hindrance originating from the coordination of the ligand around the water binding site, which favors a dissociatively activated water exchange process. The Gd(III) complexes present rather high thermodynamic stabilities (log KGdL = 20.47 and 19.77 for [GdL5]+ and [GdL6]+, respectively). Furthermore, these complexes are remarkably inert with respect to their acid-assisted dissociation, in particular the complex of L5.
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Affiliation(s)
- Gwladys Nizou
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Enikő Molnár
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Nadège Hamon
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Ferenc Krisztián Kálmán
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Olivier Fougère
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - Olivier Rousseaux
- Groupe Guerbet, Centre de Recherche d'Aulnay-sous-Bois, BP 57400, 95943 Roissy CdG Cedex, France
| | - David Esteban-Gòmez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Universidade da Coruña, Campus da Zapateira-Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Maryline Beyler
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
| | - Gyula Tircsó
- Department of Physical Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Raphaël Tripier
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 avenue Victor le Gorgeu, 29238 Brest, France
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Urbanovský P, Kotek J, Císařová I, Hermann P. The solid-state structures and ligand cavity evaluation of lanthanide(iii) complexes of a DOTA analogue with a (dibenzylamino)methylphosphinate pendant arm. Dalton Trans 2020; 49:1555-1569. [PMID: 31932828 DOI: 10.1039/c9dt04056k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A series of lanthanide(iii) complexes of a monophosphinate analogue of H4dota, 1,4,7,10-tetraazacyclododecane-1,4,7-triacetic-10-methyl[(N,N-dibenzylamino)methyl]phosphinic acid (H4do3apDBAm = H4L1), were prepared and their solid-state structures were studied using single-crystal X-ray diffraction. In all structures, the ligand anion was octadentately coordinated to the Ln(iii) or Sc(iii) ions similarly to other DOTA-like ligands, i.e. forming parallel N4- and O4-planes. The lighter lanthanide(iii) complexes (till dysprosium) were nonacoordinated in the twisted square-antiprismatic (TSA) configuration with the apical coordination of water molecules or oxygen atoms from the neighbouring complex unit. The heavier lanthanide(iii) complexes (from terbium) were found as the "anhydrous" octacoordinated twisted square-antiprismatic (TSA') isomer. For the terbium(iii) ion, both forms were structurally characterized. The structural data of the Ln(iii)-H4L1 complexes and complexes of several related DOTA-like ligands were analysed. It clearly showed that the structural parameters for the square-antiprismatic (SA) isomers were clustered in a small range while those for the TSA/TSA' isomers were significantly more spread. The analysis also gave useful information about the influence of various pendant arms on the structure of the complexes of the DOTA-like ligands. The twist angle (torsion) of the chelate ring containing a larger phosphorus atom was similar to those of the remaining three acetate pendants. It led to a larger separation of the N4O4 planes and to smaller trans-O-Ln-O angles than the parameters found in the complexes of H4dota and its tetraamide derivatives dotam(R). It resulted in a relatively long bond between the metal ion and the coordinated water molecule. It led, together with the negative charge of the oxygen atoms forming the O4-plane, to an extremely fast water exchange rate reported for the Gd(iii)-H4L1 complex and, generally, to a fast water exchange of Gd(iii) complexes with the monophosphorus acid analogues of H4dota, H5do3ap/H4do3apR.
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Affiliation(s)
- Peter Urbanovský
- Universita Karlova (Charles University), Department of Inorganic Chemistry, Hlavova 2030, 128 43 Prague 2, Czech Republic.
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11
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Connah L, Angelovski G. Solid phase synthesis in the development of magnetic resonance imaging probes. Org Chem Front 2020. [DOI: 10.1039/d0qo00921k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We review the use of the solid phase synthesis methodology for the preparation of diverse and potent MRI probes.
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Affiliation(s)
- Liam Connah
- MR Neuroimaging Agents
- Max Planck Institute for Biological Cybernetics
- Tuebingen
- Germany
| | - Goran Angelovski
- MR Neuroimaging Agents
- Max Planck Institute for Biological Cybernetics
- Tuebingen
- Germany
- Laboratory of Molecular and Cellular Neuroimaging
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12
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Huang Q, Liu Y, Zheng L, Wu L, Zhou Z, Chen J, Chen W, Zhao H. Biocompatible iron(II)-doped carbon dots as T 1-weighted magnetic resonance contrast agents and fluorescence imaging probes. Mikrochim Acta 2019; 186:492. [PMID: 31267240 DOI: 10.1007/s00604-019-3593-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 06/06/2019] [Indexed: 01/10/2023]
Abstract
The one-pot synthesis of iron-doped carbon quantum dots (Fe-CQDs) for use as both magnetic resonance (MR) and fluorescent (dual-mode) imaging nanoprobes is described. Comprehensive characterizations of the material confirmed the successful doping of the CQDs with Fe(II) ions. The imaging probe has a longitudinal relaxivity of 3.92 mM-1∙s-1 and a low r2/r1 ratio of 1.27, both of which are critical for T1-weighted contrast agents. The maximum emission of Fe-CQDs locates at 450 nm under 375 nm excitation, which also can be applied to fluorescence imaging. Biotoxicity assessment showed good biocompatibility of the Fe-CQDs. The in-vitro experiments with A549 cells indicated that the Fe-CQDs are viable candidates as dual-mode (MR/fluorescence) imaging nanoprobes. For in-vivo experiments, they exhibit high contrast efficiency, thereby improving the positive contrast in T1-weighted MR images. In-vivo time-dependent MRI of major organs showed that the Fe-CQDs undergo fast glomerular filtration and can evade immuno-absorption due to their ultra-small size and excellent biocompatibility. Graphical abstract Schematic presentation of the synthesis of Fe-CQDs and applications to magnetic resonance and fluorescent dual-mode imaging.
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Affiliation(s)
- Qing Huang
- Department of Chemistry, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Yue Liu
- Department of Chemistry, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China.
| | - Linling Zheng
- Department of Chemistry, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Liping Wu
- Department of Chemistry, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Zhengyu Zhou
- Department of Epidemiology, College of Preventive Medicine, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Jiafei Chen
- Department of Radiology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China
| | - Wei Chen
- Department of Radiology, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, China.
| | - Huawen Zhao
- Department of Chemistry, College of Basic Medical Sciences, Army Medical University (Third Military Medical University), Chongqing, 400038, China.
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13
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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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14
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Hai Z, Ni Y, Saimi D, Yang H, Tong H, Zhong K, Liang G. γ-Glutamyltranspeptidase-Triggered Intracellular Gadolinium Nanoparticle Formation Enhances the T 2-Weighted MR Contrast of Tumor. NANO LETTERS 2019; 19:2428-2433. [PMID: 30856326 DOI: 10.1021/acs.nanolett.8b05154] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Magnetic resonance imaging (MRI) is advantageous in the diagnosis of deep internal cancers, but contrast agents (CAs) are always needed to improve MRI sensitivity. Gadolinium (Gd)-based agents are routinely used as T1-dominated CAs in clinic but using intracellularly formed Gd nanoparticles to enhance the T2-weighted MRI of tumor in vivo at high magnetic field has not been reported. Herein, we rationally designed a "smart" Gd-based probe Glu-Cys(StBu)-Lys(DOTA-Gd)-CBT (1), which was subjected to γ-glutamyltranspeptidase (GGT) cleavage and an intracellular CBT-Cys condensation reaction to form Gd nanoparticles (i.e., 1-NPs) to enhance the T2-weighted MR contrast of tumor in vivo at 9.4 T. Living cell experiments indicated that the 1-treated HeLa cells had an r2 value of 27.8 mM-1 s-1 and an r2/r1 ratio of 10.6. MR imaging of HeLa tumor-bearing mice indicated that the T2 MR contrast of the tumor enhanced 28.6% at 2.5 h post intravenous injection of 1. We anticipate that our probe 1 could be employed for T2-weighted MRI diagnosis of GGT-related cancers in the future when high magnetic field is available in clinic.
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Affiliation(s)
- Zijuan Hai
- Hefei National Laboratory of Physical Sciences at Microscale, Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
- Institutes of Physical Science and Information Technology , Anhui University , 110 Jiulong Road , Hefei , Anhui 230601 , China
| | - Yanhan Ni
- Hefei National Laboratory of Physical Sciences at Microscale, Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Dilizhatai Saimi
- Hefei National Laboratory of Physical Sciences at Microscale, Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
| | - Hongyi Yang
- High Magnetic Field Laboratory , Hefei Institutes of Physical Science, Chinese Academy of Sciences , 350 Shushanhu Road , Hefei , Anhui 230031 , China
| | - Haiyang Tong
- High Magnetic Field Laboratory , Hefei Institutes of Physical Science, Chinese Academy of Sciences , 350 Shushanhu Road , Hefei , Anhui 230031 , China
| | - Kai Zhong
- High Magnetic Field Laboratory , Hefei Institutes of Physical Science, Chinese Academy of Sciences , 350 Shushanhu Road , Hefei , Anhui 230031 , China
| | - Gaolin Liang
- Hefei National Laboratory of Physical Sciences at Microscale, Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China
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15
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Wahsner J, Gale EM, Rodríguez-Rodríguez A, Caravan P. Chemistry of MRI Contrast Agents: Current Challenges and New Frontiers. Chem Rev 2019; 119:957-1057. [PMID: 30350585 PMCID: PMC6516866 DOI: 10.1021/acs.chemrev.8b00363] [Citation(s) in RCA: 818] [Impact Index Per Article: 163.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Tens of millions of contrast-enhanced magnetic resonance imaging (MRI) exams are performed annually around the world. The contrast agents, which improve diagnostic accuracy, are almost exclusively small, hydrophilic gadolinium(III) based chelates. In recent years concerns have arisen surrounding the long-term safety of these compounds, and this has spurred research into alternatives. There has also been a push to develop new molecularly targeted contrast agents or agents that can sense pathological changes in the local environment. This comprehensive review describes the state of the art of clinically approved contrast agents, their mechanism of action, and factors influencing their safety. From there we describe different mechanisms of generating MR image contrast such as relaxation, chemical exchange saturation transfer, and direct detection and the types of molecules that are effective for these purposes. Next we describe efforts to make safer contrast agents either by increasing relaxivity, increasing resistance to metal ion release, or by moving to gadolinium(III)-free alternatives. Finally we survey approaches to make contrast agents more specific for pathology either by direct biochemical targeting or by the design of responsive or activatable contrast agents.
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Affiliation(s)
- Jessica Wahsner
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Eric M. Gale
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Aurora Rodríguez-Rodríguez
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Peter Caravan
- Athinoula A. Martinos Center for Biomedical Imaging and the Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
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16
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Caravan P, Esteban-Gómez D, Rodríguez-Rodríguez A, Platas-Iglesias C. Water exchange in lanthanide complexes for MRI applications. Lessons learned over the last 25 years. Dalton Trans 2019; 48:11161-11180. [DOI: 10.1039/c9dt01948k] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Coordination chemistry offers convenient strategies to modulate the exchange of coordinated water molecules in lanthanide-based contrast agents.
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Affiliation(s)
- Peter Caravan
- The Institute for Innovation in Imaging and the A. A. Martinos Center for Biomedical Imaging
- Massachusetts General Hospital
- Harvard Medical School
- Charlestown
- USA
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
| | - Aurora Rodríguez-Rodríguez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química
- Universidade da Coruña
- 15008 A Coruña
- Spain
- The Institute for Innovation in Imaging and the A. A. Martinos Center for Biomedical Imaging
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17
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Application of Gd(III) complexes for magnetic resonance imaging and the improvement of relaxivities via nanocrystallization. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.10.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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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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19
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Katkova MA, Zabrodina GS, Baranov EV, Muravyeva MS, Kluev EA, Shavyrin AS, Zhigulin GY, Ketkov SY. New insights into water-soluble and water-coordinated copper 15-metallacrown-5 gadolinium complexes designed for high-field magnetic resonance imaging applications. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4389] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Marina A. Katkova
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
| | - Galina S. Zabrodina
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
| | - Evgeny V. Baranov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
| | - Maria S. Muravyeva
- Faculty of Radiophysics; Lobachevsky State University; Gagarin Avenue 23 Nizhny Novgorod Russian Federation
| | - Evgeny A. Kluev
- Nizhny Novgorod State Medical Academy; Minin Square 10/1 Nizhny Novgorod Russian Federation
| | - Andrey S. Shavyrin
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
| | - Grigory Yu Zhigulin
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
| | - Sergey Yu Ketkov
- G. A. Razuvaev Institute of Organometallic Chemistry RAS; Tropinin Street 49, G SP-445 Nizhny Novgorod Russian Federation
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20
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Leone L, Ferrauto G, Cossi M, Botta M, Tei L. Optimizing the Relaxivity of MRI Probes at High Magnetic Field Strengths With Binuclear Gd III Complexes. Front Chem 2018; 6:158. [PMID: 29868561 PMCID: PMC5962812 DOI: 10.3389/fchem.2018.00158] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/19/2018] [Indexed: 12/05/2022] Open
Abstract
The key criteria to optimize the relaxivity of a Gd(III) contrast agent at high fields (defined as the region ≥ 1.5 T) can be summarized as follows: (i) the occurrence of a rotational correlation time τR in the range of ca. 0.2–0.5 ns; (ii) the rate of water exchange is not critical, but a τM < 100 ns is preferred; (iii) a relevant contribution from water molecules in the second sphere of hydration. In addition, the use of macrocycle-based systems ensures the formation of thermodynamically and kinetically stable Gd(III) complexes. Binuclear Gd(III) complexes could potentially meet these requirements. Their efficiency depends primarily on the degree of flexibility of the linker connecting the two monomeric units, the absence of local motions and the presence of contribution from the second sphere water molecules. With the aim to maximize relaxivity (per Gd) over a wide range of magnetic field strengths, two binuclear Gd(III) chelates derived from the well-known macrocyclic systems DOTA-monopropionamide and HPDO3A (Gd2L1 and Gd2L2, respectively) were synthesized through a multistep synthesis. Chemical Exchange Saturation Transfer (CEST) experiments carried out on Eu2L2 at different pH showed the occurrence of a CEST effect at acidic pH that disappears at neutral pH, associated with the deprotonation of the hydroxyl groups. Then, a complete 1H and 17O NMR relaxometric study was carried out in order to evaluate the parameters that govern the relaxivity associated with these complexes. The relaxivities of Gd2L1 and Gd2L2 (20 MHz, 298 K) are 8.7 and 9.5 mM−1 s−1, respectively, +77% and +106% higher than the relaxivity values of the corresponding mononuclear GdDOTAMAP-En and GdHPDO3A complexes. A significant contribution of second sphere water molecules was accounted for the strong relaxivity enhancement of Gd2L2. MR phantom images of the dinuclear complexes compared to GdHPDO3A, recorded at 7 T, confirmed the superiority of Gd2L2. Finally, ab initio (DFT) calculations were performed to obtain information about the solution structure of the dinuclear complexes.
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Affiliation(s)
- Loredana Leone
- Dipartimento di Scienze e Innovazione Tecnologica, Università degli Studi del Piemonte Orientale "Amedeo Avogadro", Alessandria, Italy
| | - Giuseppe Ferrauto
- Department of Molecular Biotechnology and Health Sciences, Molecular Imaging Centre, University of Torino, Torino, Italy
| | - Maurizio Cossi
- Dipartimento di Scienze e Innovazione Tecnologica, Università degli Studi del Piemonte Orientale "Amedeo Avogadro", Alessandria, Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università degli Studi del Piemonte Orientale "Amedeo Avogadro", Alessandria, Italy
| | - Lorenzo Tei
- Dipartimento di Scienze e Innovazione Tecnologica, Università degli Studi del Piemonte Orientale "Amedeo Avogadro", Alessandria, Italy
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21
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Phukan B, Mukherjee C, Goswami U, Sarmah A, Mukherjee S, Sahoo SK, Moi SC. A New Bis(aquated) High Relaxivity Mn(II) Complex as an Alternative to Gd(III)-Based MRI Contrast Agent. Inorg Chem 2018; 57:2631-2638. [PMID: 29424537 DOI: 10.1021/acs.inorgchem.7b03039] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Disclosed here are a piperazine, a pyridine, and two carboxylate groups containing pentadentate ligand H2pmpa and its corresponding water-soluble Mn(II) complex (1). DFT-based structural optimization implied that the complex had pentagonal bipyramidal geometry where the axial positions were occupied by two water molecules, and the equatorial plane was constituted by the ligand ON3O donor set. Thus, a bis(aquated) disc-like Mn(II) complex has been synthesized. The complex showed higher stability compared with Mn(II)-EDTA complex [log KMnL = 14.29(3)] and showed a very high r1 relaxivity value of 5.88 mM-1 s-1 at 1.41 T, 25 °C, and pH = 7.4. The relaxivity value remained almost unaffected by the pH of the medium in the range of 6-10. Although the presence of 200 equiv of fluoride and bicarbonate anions did not affect the relaxivity value appreciably, an increase in the value was noticed in the presence of phosphate anion due to slow tumbling of the complex. Cell viability measurements, as well as phantom MR images using clinical MRI imager, consolidated the possible candidature of complex 1 as a positive contrast agent.
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Affiliation(s)
- Bedika Phukan
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
| | - Chandan Mukherjee
- Department of Chemistry , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
| | - Upashi Goswami
- Centre for Nanotechnology , Indian Institute of Technology Guwahati , Guwahati 781039 , Assam , India
| | - Amrit Sarmah
- Department of Molecular Modelling , Institute of Organic Chemistry and Biochemistry ASCR , Flemingovo nám. 2 , CZ-166 10 Prague 6 , Czech Republic
| | - Subhajit Mukherjee
- Department of Chemistry , National Institute of Technology , Durgapur 713209 , West Bengal , India
| | - Suban K Sahoo
- Department of Applied Chemistry , S.V. National Institute of Technology , Surat 395007 , Gujarat , India
| | - Sankar Ch Moi
- Department of Chemistry , National Institute of Technology , Durgapur 713209 , West Bengal , India
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22
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Phukan B, Mukherjee C, Varshney R. A new heptadentate picolinate-based ligand and its corresponding Gd(iii) complex: the effect of pendant picolinate versus acetate on complex properties. Dalton Trans 2018; 47:135-142. [DOI: 10.1039/c7dt04150k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Replacing one picolinate pendant by acetate group in H4bpeda ligand, the synthesised bis(aquated) Gd(iii) complex of ligand H4peada showed better stability and r1 relaxivity for its potential use as MRI contrast agent.
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Affiliation(s)
- Bedika Phukan
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Chandan Mukherjee
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Raunak Varshney
- Institute of Nuclear Medicine and Allied Sciences
- Delhi-100054
- India
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23
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Lenora CU, Carniato F, Shen Y, Latif Z, Haacke EM, Martin PD, Botta M, Allen MJ. Structural Features of Europium(II)-Containing Cryptates That Influence Relaxivity. Chemistry 2017; 23:15404-15414. [PMID: 28707809 DOI: 10.1002/chem.201702158] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/27/2017] [Indexed: 12/11/2022]
Abstract
EuII -containing complexes were studied with respect to properties relevant to their use as contrast agents for magnetic resonance imaging. The influences of molecular parameters and field strength on relaxivity were studied for a series of EuII -containing cryptates and their adducts with β-cyclodextrins, poly-β-cyclodextrins, and human serum albumin. Solid- and solution-phase characterization of EuII -containing complexes is presented that demonstrates the presence of inner-sphere molecules of water. Additionally, relaxivity, water-exchange rate, rotational correlation time, and electronic relaxation times were determined using variable-temperature 17 O NMR, nuclear magnetic relaxation dispersion, and electron paramagnetic resonance spectroscopic techniques. These results are expected to be instrumental in the design of future EuII -based contrast agents.
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Affiliation(s)
- Chamika U Lenora
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI, 48202, USA
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione Tecnologica, Universitâ del Piemonte Orientale "Amedeo Avogadro", Viale T. Michel 11, 15121, Alessandria, Italy
| | - Yimin Shen
- Department of Radiology, Wayne State University School of Medicine, 3990 John R Street, Detroit, MI, 48201, USA
| | - Zahid Latif
- Department of Radiology, Wayne State University School of Medicine, 3990 John R Street, Detroit, MI, 48201, USA.,Barbara Ann Karmanos Cancer Institute, 4100 John R Street, Detroit, MI, 48201, USA
| | - E Mark Haacke
- Department of Radiology, Wayne State University School of Medicine, 3990 John R Street, Detroit, MI, 48201, USA.,Barbara Ann Karmanos Cancer Institute, 4100 John R Street, Detroit, MI, 48201, USA
| | - Philip D Martin
- Lumigen Instrument Center, Chemistry Department, Wayne State University, 5101 Cass Avenue, Detroit, MI, 48202, USA
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Universitâ del Piemonte Orientale "Amedeo Avogadro", Viale T. Michel 11, 15121, Alessandria, Italy
| | - Matthew J Allen
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI, 48202, USA.,Barbara Ann Karmanos Cancer Institute, 4100 John R Street, Detroit, MI, 48201, USA
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24
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Boros E, Srinivas R, Kim H, Raitsimring AM, Astashkin AV, Poluektov OG, Niklas J, Horning AD, Tidor B, Caravan P. Intramolecular Hydrogen Bonding Restricts Gd–Aqua‐Ligand Dynamics. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702274] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eszter Boros
- A. A. Martinos Center for Biomedical Imaging Massachusetts General Hospital Harvard Medical School 149 13th Street, Suite 2301 Charlestown MA 02129 USA
| | - Raja Srinivas
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Hee‐Kyung Kim
- A. A. Martinos Center for Biomedical Imaging Massachusetts General Hospital Harvard Medical School 149 13th Street, Suite 2301 Charlestown MA 02129 USA
| | - Arnold M. Raitsimring
- Department of Chemistry and Biochemistry The University of Arizona 1306 E. University Boulevard Tucson AZ 85721-0041 USA
| | - Andrei V. Astashkin
- Department of Chemistry and Biochemistry The University of Arizona 1306 E. University Boulevard Tucson AZ 85721-0041 USA
| | - Oleg G. Poluektov
- Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA
| | - Jens Niklas
- Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA
| | - Andrew D. Horning
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Bruce Tidor
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA 02139 USA
| | - Peter Caravan
- A. A. Martinos Center for Biomedical Imaging Massachusetts General Hospital Harvard Medical School 149 13th Street, Suite 2301 Charlestown MA 02129 USA
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25
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Boros E, Srinivas R, Kim HK, Raitsimring AM, Astashkin AV, Poluektov OG, Niklas J, Horning AD, Tidor B, Caravan P. Intramolecular Hydrogen Bonding Restricts Gd-Aqua-Ligand Dynamics. Angew Chem Int Ed Engl 2017; 56:5603-5606. [PMID: 28398613 DOI: 10.1002/anie.201702274] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Indexed: 11/11/2022]
Abstract
Aqua ligands can undergo rapid internal rotation about the M-O bond. For magnetic resonance contrast agents, this rotation results in diminished relaxivity. Herein, we show that an intramolecular hydrogen bond to the aqua ligand can reduce this internal rotation and increase relaxivity. Molecular modeling was used to design a series of four Gd complexes capable of forming an intramolecular H-bond to the coordinated water ligand, and these complexes had anomalously high relaxivities compared to similar complexes lacking a H-bond acceptor. Molecular dynamics simulations supported the formation of a stable intramolecular H-bond, while alternative hypotheses that could explain the higher relaxivity were systematically ruled out. Intramolecular H-bonding represents a useful strategy to limit internal water rotational motion and increase relaxivity of Gd complexes.
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Affiliation(s)
- Eszter Boros
- A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Suite 2301, Charlestown, MA, 02129, USA
| | - Raja Srinivas
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Hee-Kyung Kim
- A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Suite 2301, Charlestown, MA, 02129, USA
| | - Arnold M Raitsimring
- Department of Chemistry and Biochemistry, The University of Arizona, 1306 E. University Boulevard, Tucson, AZ, 85721-0041, USA
| | - Andrei V Astashkin
- Department of Chemistry and Biochemistry, The University of Arizona, 1306 E. University Boulevard, Tucson, AZ, 85721-0041, USA
| | - Oleg G Poluektov
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Jens Niklas
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Andrew D Horning
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Bruce Tidor
- Department of Biological Engineering and Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Peter Caravan
- A. A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, 149 13th Street, Suite 2301, Charlestown, MA, 02129, USA
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Wang L, Lin H, Ma L, Sun C, Huang J, Li A, Zhao T, Chen Z, Gao J. Geometrical confinement directed albumin-based nanoprobes as enhanced T1 contrast agents for tumor imaging. J Mater Chem B 2017; 5:8004-8012. [DOI: 10.1039/c7tb02005h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
We report a facile strategy to assemble geometrically confined albumin-based nanoparticles as T1 contrast agents for sensitive tumor imaging.
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Affiliation(s)
- Lirong Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Hongyu Lin
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Lengceng Ma
- Department of Electronic Science and Fujian Key Laboratory of Plasma and Magnetic Resonance
- Xiamen University
- Xiamen 361005
- China
| | - Chengjie Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Jiaqi Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Ao Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Tian Zhao
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
| | - Zhong Chen
- Department of Electronic Science and Fujian Key Laboratory of Plasma and Magnetic Resonance
- Xiamen University
- Xiamen 361005
- China
| | - Jinhao Gao
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The MOE Laboratory of Spectrochemical Analysis & Instrumentation
- The Key Laboratory for Chemical Biology of Fujian Province, and iChEM
- College of Chemistry and Chemical Engineering
- Xiamen University
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Zinc-sensitive MRI contrast agent detects differential release of Zn(II) ions from the healthy vs. malignant mouse prostate. Proc Natl Acad Sci U S A 2016; 113:E5464-71. [PMID: 27562169 DOI: 10.1073/pnas.1609450113] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Many secretory tissues release Zn(II) ions along with other molecules in response to external stimuli. Here we demonstrate that secretion of Zn(II) ions from normal, healthy prostate tissue is stimulated by glucose in fasted mice and that release of Zn(II) can be monitored by MRI. An ∼50% increase in water proton signal enhancement is observed in T1-weighted images of the healthy mouse prostate after infusion of a Gd-based Zn(II) sensor and an i.p. bolus of glucose. Release of Zn(II) from intracellular stores was validated in human epithelial prostate cells in vitro and in surgically exposed prostate tissue in vivo using a Zn(II)-sensitive fluorescent probe known to bind to the extracellular surface of cells. Given the known differences in intracellular Zn(II) stores in healthy versus malignant prostate tissues, the Zn(II) sensor was then evaluated in a transgenic adenocarcinoma of the mouse prostate (TRAMP) model in vivo. The agent proved successful in detecting small malignant lesions as early as 11 wk of age, making this noninvasive MR imaging method potentially useful for identifying prostate cancer in situations where it may be difficult to detect using current multiparametric MRI protocols.
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Ma Y, Mou Q, Sun M, Yu C, Li J, Huang X, Zhu X, Yan D, Shen J. Cancer Theranostic Nanoparticles Self-Assembled from Amphiphilic Small Molecules with Equilibrium Shift-Induced Renal Clearance. Am J Cancer Res 2016; 6:1703-16. [PMID: 27446502 PMCID: PMC4955067 DOI: 10.7150/thno.15647] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 05/09/2016] [Indexed: 11/15/2022] Open
Abstract
Nano drug delivery systems have emerged as promising candidates for cancer therapy, whereas their uncertainly complete elimination from the body within specific timescales restricts their clinical translation. Compared with hepatic clearance of nanoparticles, renal excretion of small molecules is preferred to minimize the agent-induced toxicity. Herein, we construct in vivo renal-clearable nanoparticles, which are self-assembled from amphiphilic small molecules holding the capabilities of magnetic resonance imaging (MRI) and chemotherapy. The assembled nanoparticles can accumulate in tumor tissues for their nano-characteristics, while the small molecules dismantled from the nanoparticles can be efficiently cleared by kidneys. The renal-clearable nanoparticles exhibit excellent tumor-inhibition performance as well as low side effects and negligible chronic toxicity. These results demonstrate a potential strategy for small molecular nano drug delivery systems with obvious anticancer effect and low-toxic metabolism pathway for clinical applications.
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Zhang Y, Zou T, Guan M, Zhen M, Chen D, Guan X, Han H, Wang C, Shu C. Synergistic Effect of Human Serum Albumin and Fullerene on Gd-DO3A for Tumor-Targeting Imaging. ACS APPLIED MATERIALS & INTERFACES 2016; 8:11246-11254. [PMID: 27097822 DOI: 10.1021/acsami.5b12848] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A macromolecular magnetic resonance imaging (MRI) contrast agent was successfully synthesized by conjugating the gadolinium/1,4,7,10-tetraazacyclododecane-1,4,7-tetracetic acid complex (Gd-DO3A) with 6,6-phenyl-C61 butyric acid (PC61BA) and upon further modification with human serum albumin (HSA). The final product, PC61BA-(Gd-DO3A)/HSA, has a high stability and exhibits a much higher relaxivity (r1 = 89.1 mM(-1) s(-1) at 0.5 T, 300 K) than Gd-DO3A (r1 = 4.7 mM(-1) s(-1)) does under the same condition, producing the synergistic positive effect of HSA and C60 on the relaxivity of Gd-DO3A. The in vivo MR images of PC61BA-(Gd-DO3A)/HSA-treated tumor-bearing mice show strong signal enhancement for the tumor area due to the enhanced permeability and retention effect. The maximum accumulation of PC61BA-(Gd-DO3A)/HSA at the tumor site was achieved at 4 h postinjection, which may guide surgery. The results from the hematology and histological observations indicate that PC61BA-(Gd-DO3A)/HSA has no obvious toxicity in vivo. These unique properties of PC61BA-(Gd-DO3A)/HSA enable them to be highly efficient for tumor-targeting MRI in vivo, possibly providing a good solution for tumor diagnosis.
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Affiliation(s)
- Ying Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Toujun Zou
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Mirong Guan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Mingming Zhen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Daiqin Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Xiangping Guan
- Department of Radiology, Peking University Third Hospital , Beijing 100083, China
| | - Hongbin Han
- Department of Radiology, Peking University Third Hospital , Beijing 100083, China
| | - Chunru Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Chunying Shu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
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Lin Z, Allen MJ. 17O-NMR spectroscopy to study the coordination of oxygen-based ligands to lanthanide ions in solution. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1180374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Zhijin Lin
- Department of Chemistry, Wayne State University, Detroit, MI, USA
| | - Matthew J. Allen
- Department of Chemistry, Wayne State University, Detroit, MI, USA
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Ma Y, Mou Q, Wang D, Zhu X, Yan D. Dendritic Polymers for Theranostics. Theranostics 2016; 6:930-47. [PMID: 27217829 PMCID: PMC4876620 DOI: 10.7150/thno.14855] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/09/2016] [Indexed: 12/14/2022] Open
Abstract
Dendritic polymers are highly branched polymers with controllable structures, which possess a large population of terminal functional groups, low solution or melt viscosity, and good solubility. Their size, degree of branching and functionality can be adjusted and controlled through the synthetic procedures. These tunable structures correspond to application-related properties, such as biodegradability, biocompatibility, stimuli-responsiveness and self-assembly ability, which are the key points for theranostic applications, including chemotherapeutic theranostics, biotherapeutic theranostics, phototherapeutic theranostics, radiotherapeutic theranostics and combined therapeutic theranostics. Up to now, significant progress has been made for the dendritic polymers in solving some of the fundamental and technical questions toward their theranostic applications. In this review, we briefly summarize how to control the structures of dendritic polymers, the theranostics-related properties derived from their structures and their theranostics-related applications.
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Affiliation(s)
- Yuan Ma
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Quanbing Mou
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Dali Wang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Xinyuan Zhu
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
| | - Deyue Yan
- School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, P. R. China
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32
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Phukan B, Patel AB, Mukherjee C. A water-soluble and water-coordinated Mn(II) complex: synthesis, characterization and phantom MRI image study. Dalton Trans 2016; 44:12990-4. [PMID: 26135518 DOI: 10.1039/c5dt01781e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Ligand H4bedik was reacted with MnCl2·4H2O at pH ∼ 6.5 to give a highly water-soluble and water-coordinated Mn(ii) complex (). The complex was found to show r1 = 3.11 mM(-1) s(-1) per Mn(ii) at 1.4 T and 6.26 mM(-1) s(-1) per Mn(ii) at 14.1 T at 25 °C, pH = 7.4. In addition to r1, the r2 at 14.1 T was found to be 132.78 mM(-1) s(-1) per Mn(ii) at 25 °C, pH = 7.4.
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Affiliation(s)
- Bedika Phukan
- Department of Chemistry, Indian Institute of Technology, Guwahati, 781039, Assam, India.
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Krishnamurthy R, Bahouth SM, Muthupillai R. 4D Contrast-enhanced MR Angiography with the Keyhole Technique in Children: Technique and Clinical Applications. Radiographics 2016; 36:523-37. [DOI: 10.1148/rg.2016150106] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Tei L, Baranyai Z, Gaino L, Forgács A, Vágner A, Botta M. Thermodynamic stability, kinetic inertness and relaxometric properties of monoamide derivatives of lanthanide(III) DOTA complexes. Dalton Trans 2015; 44:5467-78. [PMID: 25695351 DOI: 10.1039/c4dt03939d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A complete thermodynamic and kinetic solution study on lanthanide(III) complexes with monoacetamide (DOTAMA, L1) and monopropionamide (DOTAMAP, L2) derivatives of DOTA (DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) was undertaken with the aim to elucidate their stability and inertness in aqueous media. The stability constants of GdL1 and GdL2 are comparable, whereas a more marked difference is found in the kinetic inertness of the two complexes. The formation of the Eu(III) and Ce(III) complexes takes place via the formation of the protonated intermediates which can deprotonate and transform into the final complex through a OH(-) assisted pathway. GdL2 shows faster rates of acid catalysed decomplexation with respect to GdL1, which has a kinetic inertness comparable to GdDOTA. Nevertheless, GdL2 is one order of magnitude more inert than GdDO3A. A novel DOTAMAP-based bifunctional chelating ligand and its deoxycholic acid derivative (L5) were also synthesized. Since the coordinated water molecule in GdL2 is characterized by an exchange rate ca. two orders of magnitude greater than in GdL1, the relaxivity of the macromolecular derivatives of L5 should not be limited by the slow water exchange process. The relaxometric properties of the supramolecular adduct of GdL5 with human serum albumin (HSA) were investigated in aqueous solution by measuring the magnetic field dependence of the (1)H relaxivity which, at 20 MHz and 298 K, shows a 430% increase over that of the unbound GdL5 chelate. Thus, Gd(III) complexes with DOTAMAP macrocyclic ligands can represent good candidates for the development of stable and highly effective bioconjugate systems for molecular imaging applications.
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Affiliation(s)
- Lorenzo Tei
- Dipartimento di Scienze ed Innovazione Tecnologica, Università del Piemonte Orientale "Amedeo Avogadro", Viale T. Michel 11, I-15121, Alessandria, Italy.
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Hu HY, Lim NH, Juretschke HP, Ding-Pfennigdorff D, Florian P, Kohlmann M, Kandira A, Peter von Kries J, Saas J, Rudolphi KA, Wendt KU, Nagase H, Plettenburg O, Nazare M, Schultz C. In vivo visualization of osteoarthritic hypertrophic lesions. Chem Sci 2015; 6:6256-6261. [PMID: 30090244 PMCID: PMC6054140 DOI: 10.1039/c5sc01301a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 08/12/2015] [Indexed: 11/25/2022] Open
Abstract
Osteoarthritis (OA) is one of the most common diseases in the aging population. While disease progress in humans is monitored indirectly by X-ray or MRI, small animal OA lesions detection always requires surgical intervention and histology. Here we introduce bimodal MR/NIR probes based on cartilage-targeting 1,4,7,10-tetraazacyclododecane 1,4,7,10-tetraacetic acid amide (DOTAM) that are directly administered to the joint cavity. We demonstrate applications in healthy and diseased rat joints by MRI in vivo. The same joints are inspected post-mortem by fluorescence microscopy, showing not only the precise location of the reagents but also revealing details such as focal cartilage damage and chondrophyte or osteophyte formation. This allows for determining the distinct pathological state of the disease and the regeneration capability of the animal model and will help to correctly assess the effect of potential disease modifying OA drugs (DMOADs) in the future.
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Affiliation(s)
- Hai-Yu Hu
- European Molecular Biology Laboratory (EMBL) , Interdisciplinary Chemistry Group , Cell Biology and Biophysics Unit , Meyerhofstr. 1 , 69117 Heidelberg , Germany .
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica , Peking Union Medical College and Chinese Academy of Medical Sciences , 1 Xiannongtan Street , 100050 , Beijing , China
| | - Ngee-Han Lim
- Kennedy Institute of Rheumatology , University of Oxford , Roosevelt Drive , Headington , Oxford OX37FY , UK
| | - Hans-Paul Juretschke
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | | | - Peter Florian
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Markus Kohlmann
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Abdullah Kandira
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Jens Peter von Kries
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Joachim Saas
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Karl A Rudolphi
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - K Ulrich Wendt
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Hideaki Nagase
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Oliver Plettenburg
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
| | - Marc Nazare
- Sanofi-Aventis Deutschland GmbH , Industriepark Hoechst , 65962 Frankfurt , Germany
- Leibniz-Institut für Molekulare Pharmakologie (FMP) , Campus Berlin-Buch , Robert-Roessle-Str. 10 , 13125 Berlin , Germany .
| | - Carsten Schultz
- European Molecular Biology Laboratory (EMBL) , Interdisciplinary Chemistry Group , Cell Biology and Biophysics Unit , Meyerhofstr. 1 , 69117 Heidelberg , Germany .
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36
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Stereoselective synthesis of highly branched chiral cyclobutane-cored triamines and their conjugation to Gd-DOTA. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.08.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Sun M, Zhang HY, Zhao Q, Hu XY, Wang LH, Liu BW, Liu Y. A supramolecular brush polymer via the self-assembly of bridged tris(β-cyclodextrin) with a porphyrin derivative and its magnetic resonance imaging. J Mater Chem B 2015; 3:8170-8179. [PMID: 32262874 DOI: 10.1039/c5tb01537e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate imaging of soft tissues is one of the ultimate goals in biomedical imaging. Different imaging modalities can improve their disadvantages, and promote the imaging ability. However, once an imaging agent has been prepared, it is usually hard to adjust it according to the actual needs. Herein, we developed a supramolecular brush polymer (SBP) as a versatile imaging agent platform. The SBP platform (SBPP) is constructed by the intermolecular inclusion complexation of bridged tris(β-cyclodextrin) (1) with Mn(iii)-porphyrin-bearing poly(ethylene glycol) (PEG) side chains (Mn(iii)-TPP), and can further bind other functional groups by host-guest interactions of cyclodextrin and adamantine. The SBPP is characterized by UV/vis absorption spectroscopy, NMR, dynamic light scattering (DLS), atomic force microscopy (AFM) and transmission electron microscopy (TEM). We demonstrated that this SBPP not only has no cellular toxicity against NIH 3T3 cells in in vitro cell experiments, but it also shows an efficient enhanced T1 relaxivity in in vitro MR imaging experiments. When used as multifunctional imaging agents, different imaging probes and/or targeting agents can be introduced to this SBPP as needed through simple host-guest interactions. In in vitro imaging experiments, it shows accurate imaging of different kinds of cancer cells by choosing on-demand targeting agents. These results suggest a promising strategy for engineering multifunctional imaging agents with SBPs.
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Affiliation(s)
- Mo Sun
- Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300071, People's Republic of China.
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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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Gupta A, Willis SA, Waddington LJ, Stait‐Gardner T, de Campo L, Hwang DW, Kirby N, Price WS, Moghaddam MJ. Gd‐DTPA‐Dopamine‐Bisphytanyl Amphiphile: Synthesis, Characterisation and Relaxation Parameters of the Nanoassemblies and Their Potential as MRI Contrast Agents. Chemistry 2015; 21:13950-60. [DOI: 10.1002/chem.201501905] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Indexed: 12/25/2022]
Affiliation(s)
- Abhishek Gupta
- Manufacturing Flagship CSIRO, P.O. Box 52, North Ryde, NSW, 1670 (Australia)
- Nanoscale Organisation and Dynamics Group, University of Western Sydney, Penrith, NSW, 2751 (Australia)
| | - Scott A. Willis
- Nanoscale Organisation and Dynamics Group, University of Western Sydney, Penrith, NSW, 2751 (Australia)
| | - Lynne J. Waddington
- Manufacturing Flagship CSIRO, 343 Royal Parade, Parkville, VIC, 3052 (Australia)
| | - Tim Stait‐Gardner
- Nanoscale Organisation and Dynamics Group, University of Western Sydney, Penrith, NSW, 2751 (Australia)
| | - Liliana de Campo
- Manufacturing Flagship CSIRO, P.O. Box 52, North Ryde, NSW, 1670 (Australia)
- Bragg Institute ANSTO, Lucas Heights, NSW, 2234 (Australia)
| | - Dennis W. Hwang
- Department of Chemistry and Biochemistry, National Chung Cheng University, Min‐Hsiung Township Chiayi, 621 (Taiwan)
| | - Nigel Kirby
- Australian Synchrotron, 800 Blackburn Road, Clayton, VIC, 3168 (Australia)
| | - William S. Price
- Nanoscale Organisation and Dynamics Group, University of Western Sydney, Penrith, NSW, 2751 (Australia)
| | - Minoo J. Moghaddam
- Manufacturing Flagship CSIRO, P.O. Box 52, North Ryde, NSW, 1670 (Australia)
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De León-Rodríguez LM, Martins AF, Pinho MC, Rofsky NM, Sherry AD. Basic MR relaxation mechanisms and contrast agent design. J Magn Reson Imaging 2015; 42:545-65. [PMID: 25975847 DOI: 10.1002/jmri.24787] [Citation(s) in RCA: 117] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 10/11/2014] [Indexed: 12/22/2022] Open
Abstract
The diagnostic capabilities of magnetic resonance imaging (MRI) have undergone continuous and substantial evolution by virtue of hardware and software innovations and the development and implementation of exogenous contrast media. Thirty years since the first MRI contrast agent was approved for clinical use, a reliance on MR contrast media persists, largely to improve image quality with higher contrast resolution and to provide additional functional characterization of normal and abnormal tissues. Further development of MR contrast media is an important component in the quest for continued augmentation of diagnostic capabilities. In this review we detail the many important considerations when pursuing the design and use of MR contrast media. We offer a perspective on the importance of chemical stability, particularly kinetic stability, and how this influences one's thinking about the safety of metal-ligand-based contrast agents. We discuss the mechanisms involved in MR relaxation in the context of probe design strategies. A brief description of currently available contrast agents is accompanied by an in-depth discussion that highlights promising MRI contrast agents in the development of future clinical and research applications. Our intention is to give a diverse audience an improved understanding of the factors involved in developing new types of safe and highly efficient MR contrast agents and, at the same time, provide an appreciation of the insights into physiology and disease that newer types of responsive agents can provide.
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Affiliation(s)
| | - André F Martins
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas, USA
| | - Marco C Pinho
- Department of Radiology and the Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - Neil M Rofsky
- Department of Radiology and the Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
| | - A Dean Sherry
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas, USA.,Department of Radiology and the Advanced Imaging Research Center, University of Texas Southwestern Medical Center, Dallas, Texas, USA
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41
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Abstract
This perspective outlines strategies towards the development of MR imaging probes that our lab has explored over the last 15 years. Namely, we discuss methods to enhance the signal generating capacity of MR probes and how to achieve tissue specificity through protein targeting or probe activation within the tissue microenvironment.
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Affiliation(s)
- Eszter Boros
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Eric M Gale
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Peter Caravan
- Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
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Boros E, Caravan. P. Probing the structure-relaxivity relationship of bis-hydrated Gd(DOTAla) derivatives. Inorg Chem 2015; 54:2403-10. [PMID: 25693053 PMCID: PMC4758459 DOI: 10.1021/ic503035f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two structural isomers of the heptadentate chelator DO3Ala were synthesized, with carboxymethyl groups at either the 1,4- or 1,7-positions of the cyclen macrocycle. To interrogate the relaxivity under different rotatational dynamics regimes, the pendant primary amine was coupled to ibuprofen to enable binding to serum albumin. These chelators 6a and 6b form bis(aqua) ternary complexes with Gd(III) or Tb(III) as estimated from relaxivity measurements or luminescence lifetime measurements in water. The relaxivity of [Gd(6a)(H2O)2] and [Gd(6b)(H2O)2] was measured in the presence and absence of coordinating anions prevalent in vivo such as phosphate, lactate, and bicarbonate and compared with data attained for the q = 2 complex [Gd(DO3A)(H2O)2]. We found that relaxivity was reduced through formation of ternary complexes with lactate and bicarbonate, albeit to a lesser degree then the relaxivity of Gd(DO3A). In the presence of 100-fold excess phosphate, relaxivity was slightly increased and typical for q = 2 complexes of this size (8.3 mM(-1) s(-1) and 9.5 mM(-1) s(-1), respectively, at 37 °C, 60 MHz). Relaxivity for the complexes in the presence of HSA corresponded well to relaxivity obtained for complexes with reduced access for inner-sphere water (13.5 and 12.7 mM(-1) s(-1) at 37 °C, 60 MHz). Mean water residency time at 37 °C was determined using temperature-dependent (17)O-T2 measurements at 11.7 T and calculated to be (310)τM = 23 ± 1 ns for both structural isomers. Kinetic inertness under forcing conditions (pH 3, competing DTPA ligand) was found to be comparable to [Gd(DO3A)(H2O)]. Overall, we found that the replacement of one of the acetate arms of DO3A with an amino-propionate arm does not significantly alter the relaxometric and kinetic inertness properties of the corresponding Gd complexes; however, it does provide access to easily functionalizable q = 2 derivatives.
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Affiliation(s)
- Eszter Boros
- The Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States
| | - Peter Caravan.
- The Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States
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43
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Fontes A, Karimi S, Helm L, Yulikov M, Ferreira PM, André JP. Dinuclear DOTA-Based GdIIIChelates - Revisiting a Straightforward Strategy for Relaxivity Improvement. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403159] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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44
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Lin X, Zhang Q, Chen J, Kong X, Long LS, Wang C, Lin W. Gadolinium nicotinate clusters as potential MRI contrast agents. RSC Adv 2015. [DOI: 10.1039/c4ra07853e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Three multinuclear gadolinium(iii) clusters were synthesized and characterized, and their potential as MRI contrast agents was evaluated at 7 T.
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Affiliation(s)
- Xinping Lin
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Qiongqiong Zhang
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
| | - Jiahe Chen
- Department of Physics and Electronic Science
- Fujian Key Laboratory of Plasma and Magnetic Resonance
- Xiamen University
- Xiamen 361005
- China
| | - Xiangjian Kong
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - La-Sheng Long
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- Department of Chemistry
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Cheng Wang
- Department of Chemistry
- University of Chicago
- Chicago
- USA
| | - Wenbin Lin
- Collaborative Innovation Center of Chemistry for Energy Materials
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- P. R. China
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45
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Wang L, Zhu X, Tang X, Wu C, Zhou Z, Sun C, Deng SL, Ai H, Gao J. A multiple gadolinium complex decorated fullerene as a highly sensitive T1 contrast agent. Chem Commun (Camb) 2015; 51:4390-3. [DOI: 10.1039/c5cc00285k] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A multiple gadolinium complex decorated fullerene (CGDn) as an enhanced T1 contrast agent was presented.
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Affiliation(s)
- Lirong Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Xianglong Zhu
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Xingyan Tang
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Changqiang Wu
- National Engineering Research Centre for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Zijian Zhou
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Chengjie Sun
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Shun-Liu Deng
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
| | - Hua Ai
- National Engineering Research Centre for Biomaterials
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Jinhao Gao
- State Key Laboratory of Physical Chemistry of Solid Surfaces
- The Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
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46
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Activation of Pt–O and Pt–H bonds: DFT studies on adsorption of [Gd(H2O)n]3+ (n=8–9) with Ptn (n=3–7) cluster. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.08.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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47
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Zhu J, Gale EM, Atanasova I, Rietz TA, Caravan P. Hexameric Mn(II) dendrimer as MRI contrast agent. Chemistry 2014; 20:14507-13. [PMID: 25224391 PMCID: PMC4260332 DOI: 10.1002/chem.201403883] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Indexed: 12/30/2022]
Abstract
A Mn(II) chelating dendrimer was prepared as a contrast agent for MRI applications. The dendrimer comprises six tyrosine-derived [Mn(EDTA)(H2 O)](2-) moieties coupled to a cyclotriphosphazene core. Variable temperature (17) O NMR spectroscopy revealed a single water co-ligand per Mn(II) that undergoes fast water exchange (kex =(3.0±0.1)×10(8) s(-1) at 37 °C). The 37 °C per Mn(II) relaxivity ranged from 8.2 to 3.8 mM(-1) s(-1) from 0.47 to 11.7 T, and is sixfold higher on a per molecule basis. From this field dependence a rotational correlation time was estimated as 0.45(±0.02) ns. The imaging and pharmacokinetic properties of the dendrimer were compared to clinically used [Gd(DTPA)(H2 O)](2-) in mice at 4.7 T. On first pass, the higher per ion relaxivity of the dendrimer resulted in twofold greater blood signal than for [Gd(DTPA)(H2 O)](2-) . Blood clearance was fast and elimination occurred through both the renal and hepatobiliary routes. This Mn(II) containing dendrimer represents a potential alternative to Gd-based contrast agents, especially in patients with chronic kidney disease where the use of current Gd-based agents may be contraindicated.
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Affiliation(s)
- Jiang Zhu
- Athinoula A. Martinos Center for Biomedical Imaging, Deparment of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Masachusetts, USA, 02141
- Sichuan Key Laboratory of Medical Imaging, North Sichuan Medical College
| | - Eric M. Gale
- Athinoula A. Martinos Center for Biomedical Imaging, Deparment of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Masachusetts, USA, 02141
| | - Iliyana Atanasova
- Massachusetts Institue of Technology, Cambridge, Massachusetts, USA, 02141
| | - Tyson A. Rietz
- Athinoula A. Martinos Center for Biomedical Imaging, Deparment of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Masachusetts, USA, 02141
| | - Peter Caravan
- Athinoula A. Martinos Center for Biomedical Imaging, Deparment of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Masachusetts, USA, 02141
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Liu CL, Peng YK, Chou SW, Tseng WH, Tseng YJ, Chen HC, Hsiao JK, Chou PT. One-step, room-temperature synthesis of glutathione-capped iron-oxide nanoparticles and their application in in vivo T1-weighted magnetic resonance imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:3962-3969. [PMID: 25044378 DOI: 10.1002/smll.201303868] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Indexed: 06/03/2023]
Abstract
The room-temperature, aqueous-phase synthesis of iron-oxide nanoparticles (IO NPs) with glutathione (GSH) is reported. The simple, one-step reduction involves GSH as a capping agent and tetrakis(hydroxymethyl)phosphonium chloride (THPC) as the reducing agent; GSH is an anti-oxidant that is abundant in the human body while THPC is commonly used in the synthesis of noble-metal clusters. Due to their low magnetization and good water-dispersibility, the resulting GSH-IO NPs, which are 3.72 ± 0.12 nm in diameter, exhibit a low r2 relaxivity (8.28 mm(-1) s(-1)) and r2/r1 ratio (2.28)--both of which are critical for T1 contrast agents. This, together with the excellent biocompatibility, makes these NPs an ideal candidate to be a T1 contrast agent. Its capability in cellular imaging is illustrated by the high signal intensity in the T1-weighted magnetic resonance imaging (MRI) of treated HeLa cells. Surprisingly, the GSH-IO NPs escape ingestion by the hepatic reticuloendothelial system, enabling strong vascular enhancement at the internal carotid artery and superior sagittal sinus, where detection of the thrombus is critical for diagnosing a stroke. Moreover, serial T1- and T2-weighted time-dependent MR images are resolved for a rat's kidneys, unveiling detailed cortical-medullary anatomy and renal physiological functions. The newly developed GSH-IO NPs thus open a new dimension in efforts towards high-performance, long-circulating MRI contrast agents that have biotargeting potential.
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Affiliation(s)
- Chien-Liang Liu
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan
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49
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A peptide probe for the detection of neurokinin-1 receptor by disaggregation enhanced fluorescence and magnetic resonance signals. Sci Rep 2014; 4:6487. [PMID: 25270511 PMCID: PMC4180826 DOI: 10.1038/srep06487] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 09/09/2014] [Indexed: 01/05/2023] Open
Abstract
We report a novel peptide probe for the detection of neurokinin-1 receptor using disaggregation-caused signal enhancement. The probe was obtained via the aggregation of a modified substance P in a terpyridine-Fe (II) complex with Gd (III)-DOTA into well-defined nanostructures, which effectively weaken ligand fluorescence and slow the exchange rate of inner-sphere water molecules. This probe disaggregates upon binding to the neurokinin-1 receptor and activates the contrast agents to generate a fluorescent signal that positively enhances magnetic resonance imaging contrast and allows for the detection of overexpressed receptors on tumor cells and the identification of lung cancer using serum samples.
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50
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Boros E, Karimi S, Kenton N, Helm L, Caravan P. Gd(DOTAlaP): exploring the boundaries of fast water exchange in gadolinium-based magnetic resonance imaging contrast agents. Inorg Chem 2014; 53:6985-94. [PMID: 24922178 PMCID: PMC4095929 DOI: 10.1021/ic5008928] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
![]()
Here,
we describe the synthesis of the single amino acid chelator DOTAlaP
and four of its derivatives. The corresponding gadolinium(III) complexes
were investigated for their kinetic inertness, relaxometric properties
at a range of fields and temperatures, water exchange rate, and interaction
with human serum albumin (HSA). Derivatives with one inner-sphere
water (q = 1) were determined to have a mean water
residency time between 8 and 6 ns in phoshate-buffered saline at 37
°C. The corresponding europium complexes were also formed and
used to obtain information on the hydration number of the corresponding
coordination complexes. Two complexes capable of binding HSA were
also synthesized, of which one, Gd(5b), contains no inner-sphere
water, while the other derivative, Gd(4b), is a mixture
of ca. 15% q =1 and 85% q = 0. In
the presence of HSA, the latter displayed a very short mean water
residency time (τM310 = 2.4 ns) and enhanced
relaxivity at intermediate and high fields. The kinetic inertness
of Gd(4b) with respect to complex dissociation was decreased
compared to its DOTAla analogue but still 100-fold more inert than
[Gd(BOPTA)(H2O)]2–. Magnetic resonance
imaging in mice showed that Gd(4b) was able to provide
38% better vessel to muscle contrast compared to the clinically used
HSA binding agent MS-325. Converting one
of the acetate groups in the single amino acid chelator DOTAla to
methylenephosphonate (DOTAlaP) results in gadolinium(III) complexes
with extremely fast water exchange kinetics and/or in equilibrium
between monoaquated (q = 1) and unaquated (q = 0) states. The presence of phosphonate and the very
fast water exchange kinetics result in stable complexes with high
relaxivity at high magnetic fields, especially when bound to serum
albumin.
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Affiliation(s)
- Eszter Boros
- The Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School , 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129, United States
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