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Koucký F, Dobrovolná T, Kotek J, Císařová I, Havlíčková J, Liška A, Kubíček V, Hermann P. Transition metal complexes of the (2,2,2-trifluoroethyl)phosphinate NOTA analogue as potential contrast agents for 19F magnetic resonance imaging. Dalton Trans 2024; 53:9267-9285. [PMID: 38596878 DOI: 10.1039/d4dt00507d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
A new hexadentate 1,4,7-triazacyclononane-based ligand bearing three coordinating methylene-(2,2,2-trifluoroethyl)phosphinate pendant arms was synthesized and its coordination behaviour towards selected divalent (Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+, Zn2+) and trivalent (Cr3+, Fe3+, Co3+) transition metal ions was studied. The ligand forms stable complexes with late divalent transition metal ions (from Co2+ to Zn2+) and the complexes of these metal ions are formed above pH ∼3. A number of complexes with divalent metal ions were structurally characterized by means of single-crystal X-ray diffraction. The complex of the larger Mn2+ ion adopts a twisted trigonally antiprismatic geometry with a larger coordination cavity and smaller torsion of the pendant arms, whereas the smaller ions Ni2+, Cu2+ and Zn2+ form octahedral species with a smaller cavity and larger pendant arm torsion. In the case of the Co2+ complexes, both coordination arrangements were observed. The complexes with paramagnetic metal ions were studied from the point of view of potential utilization in 19F magnetic resonance imaging. A significant shortening of the 19F NMR longitudinal relaxation times was observed: a sub-millisecond range for complexes of Cr3+, Mn2+ and Fe3+ with symmetric electronic states (t2g3 and HS-d5), the millisecond range for the Ni2+ and Cu2+ complexes and tens of milliseconds for the Co2+ complex. Such short relaxation times are consistent with a short distance between the paramagnetic metal ion and the fluorine atoms (∼5.5-6.5 Å). Among the redox-active complexes (Mn3+/Mn2+, Fe3+/Fe2+, Co3+/Co2+, Cu2+/Cu+), the cobalt complexes show sufficient stability and a paramagnetic-diamagnetic changeover with the redox potential lying in a physiologically relevant range. Thus, the Co3+/Co2+ complex pair can be potentially used as a smart redox-responsive contrast agent for 19F MRI.
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Affiliation(s)
- Filip Koucký
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Tereza Dobrovolná
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Jan Kotek
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Jana Havlíčková
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Alan Liška
- Department of Molecular Electrochemistry and Catalysis, J. Heyrovský Institute of Physical Chemistry AS CR, Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Vojtěch Kubíček
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Petr Hermann
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
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Kaster MA, Caldwell MA, Meade TJ. Development of Ln(III) Derivatives as 19F Parashift Probes. Inorg Chem 2024; 63:9877-9887. [PMID: 38748735 DOI: 10.1021/acs.inorgchem.4c00652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2024]
Abstract
19F parashift probes with paramagnetically shifted reporter nuclei provide attractive platforms to develop molecular imaging probes. These probes enable ratiometric detection of molecular disease markers using a direct detection technique. Here, we describe a series of trivalent lanthanide (Ln(III)) complexes that are structural analogues of the clinically approved MR contrast agent (CA) ProHance to obtain LnL 19F parashift probes. We evaluated trans-gadolinium paramagnetic lanthanides compared to diamagnetic YL for 19F chemical shift and relaxation rate enhancement. The paramagnetic contribution to chemical shift (δPCS) for paramagnetic LnL exhibited either shifts to lower frequency (δPCS < 0 for TbL, DyL, and HoL) or shifts to higher frequency (δPCS > 0 for ErL, TmL, and YbL) compared to YL 19F spectroscopic signal. Zero-echo time pulse sequences achieved 56-fold sensitivity enhancement for DyL over YL, while developing probe-specific pulse sequences with fast delay times and acquisition times achieved 0.6-fold enhancement in limit of detection for DyL. DyL provides an attractive platform to develop 19F parashift probes for ratiometric detection of enzymatic activity.
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Affiliation(s)
- Megan A Kaster
- Departments of Chemistry, Molecular Biosciences, Neurobiology and Radiology, Northwestern University, 2145 N. Sheridan Road, Evanston, Illinois 60208, United States
| | - Michael A Caldwell
- Departments of Chemistry, Molecular Biosciences, Neurobiology and Radiology, Northwestern University, 2145 N. Sheridan Road, Evanston, Illinois 60208, United States
| | - Thomas J Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology and Radiology, Northwestern University, 2145 N. Sheridan Road, Evanston, Illinois 60208, United States
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3
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Jang M, Han MS. A pH-responsive sensor based on intramolecular internal standard for reproducible detection of strong acids and bases via 19F NMR spectroscopy. Anal Chim Acta 2023; 1274:341558. [PMID: 37455077 DOI: 10.1016/j.aca.2023.341558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/16/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023]
Abstract
Numerous methods, including pH meters and optical sensors, have been developed for the detection of pH, which is an important indicator in various fields. However, those methods are susceptible to errors in strongly acidic and basic ranges and inaccurate pH measurement due to sample turbidity, hindering their application such as photographic industries and wastewater treatment facilities. Eco-friendly and non-invasive 19F NMR spectroscopy is a promising technique for measurement of strong acids and bases owing to its high sensitivity and little interference; nevertheless, inconsistencies in reproducibility impede its widespread adoption. Herein, we developed a19F NMR-based pH sensor by introducing an intramolecular internal standard strategy into a pH-responsive fluorinated material. Based on the acceptable deviation (ΔδF = 17-19 ppb) in the evaluation of the internal standard signal, this pH-sensing platform enabled reproducible pH measurements in strongly acidic and basic environments. Moreover, its 19F NMR response showed reversibility and high stability to potential interfering factors, and the low absolute difference (0.026-0.086 in pH) for real samples such as diet Coke suggests its potential suitability for various acidic beverages.
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Affiliation(s)
- Mincheol Jang
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, Gwangju, 61005, Republic of Korea.
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4
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Koucký F, Kotek J, Císařová I, Havlíčková J, Kubíček V, Hermann P. Transition metal complexes of cyclam with two 2,2,2-trifluoroethylphosphinate pendant arms as probes for 19F magnetic resonance imaging. Dalton Trans 2023; 52:12208-12223. [PMID: 37401675 DOI: 10.1039/d3dt01420g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/05/2023]
Abstract
A new cyclam-based ligand bearing two methylene(2,2,2-trifluoroethyl)phosphinate pendant arms was synthesized and its coordination behaviour towards selected divalent transition metal ions [Co(II), Ni(II), Cu(II), Zn(II)] was studied. The ligand was found to be very selective for the Cu(II) ion according to the common Williams-Irving trend. Complexes with all the studied metal ions were structurally characterized. The Cu(II) ion forms two isomeric complexes; the pentacoordinated isomer pc-[Cu(L)] is the kinetic product and the octahedral trans-O,O'-[Cu(L)] isomer is the final (thermodynamic) product of the complexation reaction. Other studied metal ions form octahedral cis-O,O'-[M(L)] complexes. The complexes with paramagnetic metal ions showed a significant shortening of 19F NMR longitudinal relaxation times (T1) to the millisecond range [Ni(II) and Cu(II) complexes] or tens of milliseconds [Co(II) complex] at the temperature and magnetic field relevant for 19F magnetic resonance imaging (MRI). Such a short T1 results from a short distance between the paramagnetic metal ion and the fluorine atoms (∼6.1-6.4 Å). The complexes show high kinetic inertness towards acid-assisted dissociation; in particular, the trans-O,O'-[Cu(L)] complex was found to be extremely inert with a dissociation half-time of 2.8 h in 1 M HCl at 90 °C. Together with the short relaxation time, it potentially enables in vitro/in vivo utilization of the complexes as efficient contrast agents for 19F MRI.
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Affiliation(s)
- Filip Koucký
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Jan Kotek
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Jana Havlíčková
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Vojtěch Kubíček
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Petr Hermann
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
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Miller SL, Gaidamauskas E, Altaf AA, Crans DC, Levinger NE. Where Are Sodium Ions in AOT Reverse Micelles? Fluoride Anion Probes Nanoconfined Ions by 19F Nuclear Magnetic Resonance Spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 37219990 DOI: 10.1021/acs.langmuir.3c00649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Confining water to nanosized spaces creates a unique environment that can change water's structural and dynamic properties. When ions are present in these nanoscopic spaces, the limited number of water molecules and short screening length can dramatically affect how ions are distributed compared to the homogeneous distribution assumed in bulk aqueous solution. Here, we demonstrate that the chemical shift observed in 19F NMR spectroscopy of fluoride anion, F-, probes the location of sodium ions, Na+, confined in reverse micelles prepared from AOT (sodium dioctyl sulfosuccinate) surfactants. Our measurements show that the nanoconfined environment of reverse micelles can lead to extremely high apparent ion concentrations and ionic strength, beyond the limit in bulk aqueous solutions. Most notably, the 19F NMR chemical shift trends we observe for F- in the reverse micelles indicate that the AOT sodium counterions remain at or near the interior interface between surfactant and water, thus providing the first experimental support for this hypothesis.
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Affiliation(s)
- Samantha L Miller
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ernestas Gaidamauskas
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Ataf Ali Altaf
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Chemistry, University of Okara, Okara 56300, Pakistan
| | - Debbie C Crans
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Cell and Molecular Biology Program, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Nancy E Levinger
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
- Department of Electrical and Computer Engineering, Colorado State University, Fort Collins, Colorado 80523, United States
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6
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Kotková Z, Koucký F, Kotek J, Císařová I, Parker D, Hermann P. Copper(II) complexes of cyclams with N-(2,2,2-trifluoroethyl)-aminoalkyl pendant arms as potential probes for 19F magnetic resonance imaging. Dalton Trans 2023; 52:1861-1875. [PMID: 36448539 DOI: 10.1039/d2dt03360g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A series of Cu(II) complexes with cyclam-based ligands containing two N-(2,2,2-trifluoroethyl)-aminoalkyl pendant arms in 1,8-positions (L1: 1,2-ethylene spacer, L2: 1,3-propylene spacer; L3: 1,4-butylene spacer) was studied in respect to potential use as contrast agents for 19F magnetic resonance imaging (MRI). A number of structures of the complexes as well as of several organic precursors were determined by single-crystal X-ray diffraction analysis. Geometric parameters (especially distances between fluorine atoms and the central metal ion) were determined for each complex and the identity of isomeric complex species present in solution was established. The NMR longitudinal relaxation times (T1) of 19F nuclei in the ligands at clinically relevant fields and temperatures (1-2 s) were significantly shortened upon Cu(II) binding to 7-10 ms for [Cu(L1)]2+, 20-30 ms for [Cu(L2)]2+ and 20-50 ms for [Cu(L3)]2+. The trend of the relaxation time shortening is in accordance with the distance and number of chemical bonds between fluorine atoms and the Cu(II) ion. The signals show promising T2*/T1 ratios in the range 0.25-0.55, assuring their good applicability to 19F NMR/MRI. The results show that even the Cu(II) ion, with a small magnetic moment, causes significant relaxation enhancement with a long-range effect and can be considered as a highly suitable metal ion for efficient 19F MRI contrast agents.
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Affiliation(s)
- Zuzana Kotková
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Filip Koucký
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Jan Kotek
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
| | - David Parker
- Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong
| | - Petr Hermann
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 42 Prague 2, Czech Republic.
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7
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Li A, Luo X, Chen D, Li L, Lin H, Gao J. Small Molecule Probes for 19F Magnetic Resonance Imaging. Anal Chem 2023; 95:70-82. [PMID: 36625117 DOI: 10.1021/acs.analchem.2c04539] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Ao Li
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
| | - Xiangjie Luo
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
| | - Dongxia Chen
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
| | - Lingxuan Li
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
| | - Hongyu Lin
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
| | - Jinhao Gao
- The MOE Key Laboratory of Spectrochemical Analysis & Instrumentation, Fujian Provincial Key Laboratory of Chemical Biology, and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen361005, China
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8
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Zalewski M, Janasik D, Wierzbicka A, Krawczyk T. Design Principles of Responsive Relaxometric 19F Contrast Agents: Evaluation from the Point of View of Relaxation Theory and Experimental Data. Inorg Chem 2022; 61:19524-19542. [DOI: 10.1021/acs.inorgchem.2c03451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Mariusz Zalewski
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100Gliwice, Poland
| | - Dawid Janasik
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100Gliwice, Poland
| | - Adrianna Wierzbicka
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100Gliwice, Poland
| | - Tomasz Krawczyk
- Department of Chemical Organic Technology and Petrochemistry, Faculty of Chemistry, Silesian University of Technology, Krzywoustego 4, 44-100Gliwice, Poland
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9
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Cho H, Lee S, Han MS. Investigation of a benzodiazaborine library to identify new pH-responsive fluorophores. Org Biomol Chem 2022; 20:4986-4992. [PMID: 35678608 DOI: 10.1039/d2ob00817c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The detection of pH is important owing to its significance in various processes, such as clinical and industrial processes. Numerous fluorescent pH probes have been developed using a variety of fluorophores; however, most are only suitable for application in a narrow pH range (between 5 and 8) owing to the lack of diversity of the pH-sensitive units. Furthermore, probes suitable for sensing high pHs have rarely been studied despite the importance of reliable detection of high pH in various industrial processes. In this study, we prepared a benzodiazaborine (bDAB) library consisting of 238 different bDABs through combinatorial synthesis to investigate their suitability as fluorescent pH probes. Informed by the results of a fluorescence-based, high-throughput screening of the library, we identified four bDABs that exhibit promising pH-sensitive ratiometric fluorescence responses. Their pKas vary significantly, ranging from 7.29 to 12.44, indicating their suitability for the detection of basic pHs even in extremely basic environments (pH > 10). Furthermore, their fluorescence responses show high stability, anti-interference, and reversibility under various pH conditions.
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Affiliation(s)
- Hyungjin Cho
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Suji Lee
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Min Su Han
- Department of Chemistry, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.
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10
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Zalewski M, Janasik D, Kapała A, Minoshima M, Sugihara F, Raj W, Pietrasik J, Kikuchi K, Krawczyk T. Ph‐Sensitive Polymethacrylates as Potential Contrast Agents in
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F MRI. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mariusz Zalewski
- Department of Chemical Organic Technology and Petrochemistry Silesian University of Technology Krzywoustego 4 Gliwice 44–100 Poland
| | - Dawid Janasik
- Department of Chemical Organic Technology and Petrochemistry Silesian University of Technology Krzywoustego 4 Gliwice 44–100 Poland
| | - Anna Kapała
- Department of Chemical Organic Technology and Petrochemistry Silesian University of Technology Krzywoustego 4 Gliwice 44–100 Poland
| | - Masafumi Minoshima
- Graduate School of Engineering Osaka University Yamadaoka 2‐1 Suita Osaka 565–0871 Japan
| | - Fuminori Sugihara
- Immunology Frontier Research Center Osaka University Yamadaoka 3‐1 Suita Osaka 565–0871 Japan
| | - Wojciech Raj
- Institute of Polymer and Dye Technology Lodz University of Technology Stefanowskiego 16 Lodz 90–537 Poland
| | - Joanna Pietrasik
- Institute of Polymer and Dye Technology Lodz University of Technology Stefanowskiego 16 Lodz 90–537 Poland
| | - Kazuya Kikuchi
- Graduate School of Engineering Osaka University Yamadaoka 2‐1 Suita Osaka 565–0871 Japan
| | - Tomasz Krawczyk
- Department of Chemical Organic Technology and Petrochemistry Silesian University of Technology Krzywoustego 4 Gliwice 44–100 Poland
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11
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Kocsi D, Orthaber A, Borbas E. Tuning the photophysical properties of luminescent lanthanide complexes through regioselective antenna fluorination. Chem Commun (Camb) 2022; 58:6853-6856. [DOI: 10.1039/d2cc01229d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Carbostyrils monofluorinated in the 3, 5, or 6 positions were synthesised from olefinic precursors via a photochemical isomerisation-cyclisation route, and incorporated into octadentate cyclen triacetate ligands that formed luminescent complexes...
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12
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Prosser KE, Xie D, Chu A, MacNeil GA, Varju BR, Kadakia RT, Que EL, Walsby CJ. Copper(II) Pyridyl Aminophenolates: Hypoxia-Selective, Nucleus-Targeting Cytotoxins, and Magnetic Resonance Probes. Chemistry 2021; 27:9839-9849. [PMID: 33878230 DOI: 10.1002/chem.202100603] [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: 02/16/2021] [Indexed: 11/10/2022]
Abstract
Targeting the low-oxygen (hypoxic) environments found in many tumours by using redox-active metal complexes is a strategy that can enhance efficacy and reduce the side effects of chemotherapies. We have developed a series of CuII complexes with tridentate pyridine aminophenolate-based ligands for preferential activation in the reduction window provided by hypoxic tissues. Furthermore, ligand functionalization with a pendant CF3 group provides a 19 F spectroscopic handle for magnetic-resonance studies of redox processes at the metal centre and behaviour in cellular environments. The phenol group in the ligand backbone was substituted at the para position with H, Cl, and NO2 to modulate the reduction potential of the CuII centre, giving a range of values below the window expected for hypoxic tissues. The NO2 -substituted complex, which has the highest reduction potential, showed enhanced cytotoxic selectivity towards HeLa cells grown under hypoxic conditions. Cell death occurs by apoptosis, as determined by analysis of the cell morphology. A combination of 19 F NMR and ICP-OES indicates localization of the NO2 complex in HeLa cell nuclei and increased cellular accumulation under hypoxia. This correlates with DNA nuclease activity being the likely origin of cytotoxic activity, as demonstrated by cleavage of DNA plasmids in the presence of the CuII nitro complex and a reducing agent. Selective detection of the paramagnetic CuII complexes and their diamagnetic ligands by 19 F MRI suggests hypoxia-targeting theranostic applications by redox activation.
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Affiliation(s)
- Kathleen E Prosser
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada.,Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Da Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Annica Chu
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Gregory A MacNeil
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Bryton R Varju
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
| | - Rahul T Kadakia
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th Street Stop A5300, Austin, TX 78712, USA
| | - Charles J Walsby
- Department of Chemistry, Simon Fraser University, 8888 University Dr., Burnaby, BC V5A 1S6, Canada
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13
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Liu X, Sun X, Liang G. Peptide-based supramolecular hydrogels for bioimaging applications. Biomater Sci 2021; 9:315-327. [DOI: 10.1039/d0bm01020k] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Peptide-based supramolecular hydrogels have unique merits in bioimaging applications.
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Affiliation(s)
- Xiaoyang Liu
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing
- China
| | - Xianbao Sun
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing
- China
| | - Gaolin Liang
- State Key Laboratory of Bioelectronics
- School of Biological Science and Medical Engineering
- Southeast University
- Nanjing
- China
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Kiraev SR, Mathieu E, Siemens F, Kovacs D, Demeyere E, Borbas KE. Lanthanide(III) Complexes of Cyclen Triacetates and Triamides Bearing Tertiary Amide-Linked Antennae. Molecules 2020; 25:molecules25225282. [PMID: 33198318 PMCID: PMC7698001 DOI: 10.3390/molecules25225282] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 01/08/2023] Open
Abstract
The coordination compounds of the trivalent lanthanide ions (Ln(III)) have unique photophysical properties. Ln(III) excitation is usually performed through a light-harvesting antenna. To enable Ln(III)-based emitters to reach their full potential, an understanding of how complex structure affects sensitization and quenching processes is necessary. Here, the role of the linker between the antenna and the metal binding fragment was studied. Four macrocyclic ligands carrying coumarin 2 or 4-methoxymethylcarbostyril sensitizing antennae linked to an octadentate macrocyclic ligand binding site were synthesized. Complexation with Ln(III) (Ln = La, Sm, Eu, Gd, Tb, Yb and Lu) yielded species with overall −1, 0, or +2 and +3-charge. Paramagnetic 1H NMR spectroscopy indicated subtle differences between the coumarin- and carbostyril-carrying Eu(III) and Yb(III) complexes. Cyclic voltammetry showed that the effect of the linker on the Eu(III)/Eu(II) apparent reduction potential was dependent on the electronic properties of the N-substituent. The Eu(III), Tb(III) and Sm(III) complexes were all luminescent. Coumarin-sensitized complexes were poorly emissive; photoinduced electron transfer was not a major quenching pathway in these species. These results show that seemingly similar emitters can undergo very different photophysical processes, and highlight the crucial role the linker can play.
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15
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Xie D, Yu M, Xie Z, Kadakia RT, Chung C, Ohman LE, Javanmardi K, Que EL. Versatile Nickel(II) Scaffolds as Coordination‐Induced Spin‐State Switches for
19
F Magnetic Resonance‐Based Detection. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010587] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Da Xie
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Meng Yu
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Zhu‐Lin Xie
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Rahul T. Kadakia
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Chris Chung
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Lauren E. Ohman
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
| | - Kamyab Javanmardi
- Department of Molecular Biosciences The University of Texas at Austin 2500 Speedway Austin TX 78712 USA
| | - Emily L. Que
- Department of Chemistry The University of Texas at Austin 105 E. 24th St Stop A5300 Austin TX 78712 USA
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16
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Xie D, Yu M, Xie ZL, Kadakia RT, Chung C, Ohman LE, Javanmardi K, Que EL. Versatile Nickel(II) Scaffolds as Coordination-Induced Spin-State Switches for 19 F Magnetic Resonance-Based Detection. Angew Chem Int Ed Engl 2020; 59:22523-22530. [PMID: 32790890 DOI: 10.1002/anie.202010587] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Indexed: 12/15/2022]
Abstract
19 F magnetic resonance (MR) based detection coupled with well-designed inorganic systems shows promise in biological investigations. Two proof-of-concept inorganic probes that exploit a novel mechanism for 19 F MR sensing based on converting from low-spin (S=0) to high-spin (S=1) Ni2+ are reported. Activation of diamagnetic NiL1 and NiL2 by light or β-galactosidase, respectively, converts them into paramagnetic NiL0 , which displays a single 19 F NMR peak shifted by >35 ppm with accelerated relaxation rates. This spin-state switch is effective for sensing light or enzyme expression in live cells using 19 F MR spectroscopy and imaging that differentiate signals based on chemical shift and relaxation times. This general inorganic scaffold has potential for developing agents that can sense analytes ranging from ions to enzymes, opening up diverse possibilities for 19 F MR based biosensing.
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Affiliation(s)
- Da Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Meng Yu
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Zhu-Lin Xie
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Rahul T Kadakia
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Chris Chung
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Lauren E Ohman
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
| | - Kamyab Javanmardi
- Department of Molecular Biosciences, The University of Texas at Austin, 2500 Speedway, Austin, TX, 78712, USA
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, TX, 78712, USA
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Caldwell MA, Brue CR, Whittemore TJ, Meade TJ. A Ln(III)-3-hydroxypyridine pH responsive probe optimized by DFT. RSC Adv 2020; 10:8994-8999. [PMID: 32274014 PMCID: PMC7144623 DOI: 10.1039/c9ra11058e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Differences in tissue pH can be diagnostic of cancer and other conditions that shift cell metabolism. Paramagnetic probes are promising tools for pH mapping in vivo using magnetic resonance spectroscopy (MRS) as they provide uniquely shifted MR signals that change with pH. Here, we demonstrate a 3-hydroxy-6-methylpyridyl coordinating group as a new pH-responsive reporter group for Ln(III) MRS probes. The pH response of the complex was observed by UV-Vis, fluorescence, and NMR spectroscopies, and modeled using DFT. These results provide insight into the observed pH-dependent NMR spectrum of the complex. The protonation state of the hydroxypyridine changes the coordinating ability of the ligand, affecting the dipolar field of the lanthanide and the chemical shift of nearby reporter nuclei. The favorable pH response and coordination properties of the 3-hydroxypyridyl group indicates its potential for further development as a dual responsive-reporter group. Incorporation into optimized scaffolds for MRS detection may enable sensitive pH-mapping in vivo.
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Affiliation(s)
- Michael A Caldwell
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208
| | - Christopher R Brue
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208
| | - Tyler J Whittemore
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208
| | - Thomas J Meade
- Departments of Chemistry, Molecular Biosciences, Neurobiology, and Radiology, Northwestern University, Evanston, IL, 60208
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18
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Design, Characterization and Molecular Modeling of New Fluorinated Paramagnetic Contrast Agents for Dual 1H/19F MRI. MAGNETOCHEMISTRY 2020. [DOI: 10.3390/magnetochemistry6010008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
One major goal in medical imaging is the elaboration of more efficient contrast agents (CAs). Those agents need to be optimized for the detection of affected tissues such as cancers or tumors while decreasing the injected quantity of agents. The paramagnetic contrast agents containing fluorine atoms can be used for both proton and fluorine magnetic resonance imaging (MRI), and they open the possibility of simultaneously mapping the anatomy using 1H MRI and accurately locating the agents using 19F MRI. One of the challenges in this domain is to synthesize molecules containing several chemically equivalent fluorine atoms with relatively short relaxation times to allow the recording of 19F MR images in good conditions. With that aim, we propose to prepare a CA containing a paramagnetic center and nine chemically equivalent fluorine atoms using a cycloaddition reaction between two building blocks. These fluorinated contrast agents are characterized by 19F NMR, showing differences in the fluorine relaxation times T1 and T2 depending on the lanthanide ion. To complement the experimental results, molecular dynamics simulations are performed to shed light on the 3D-structure of the molecules in order to estimate the distance between the lanthanide ion and the fluorine atoms.
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19
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Xie D, Yu M, Kadakia RT, Que EL. 19F Magnetic Resonance Activity-Based Sensing Using Paramagnetic Metals. Acc Chem Res 2020; 53:2-10. [PMID: 31809009 DOI: 10.1021/acs.accounts.9b00352] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Fluorine magnetic resonance imaging (19F MRI) is a promising bioimaging technique due to the favorable magnetic resonance properties of the 19F nucleus and the lack of detectable biological background signal. A range of imaging agents have been developed for this imaging modality including small molecule perfluorocarbons, fluorine-rich macromolecules and nanoparticles, and paramagnetic metal-containing agents. Incorporation of paramagnetic metals into fluorinated agents provides a unique opportunity to manipulate relaxation and chemical shift properties of 19F nuclei. Paramagnetic centers will enhance relaxation rates of nearby 19F nuclei through paramagnetic relaxation enhancement (PRE). Further, metals with anisotropic unpaired electrons can induce changes in 19F chemical shift through pseudocontact shift (PCS) effects. PRE and PCS are dependent on the nature of the metal center itself, the molecular scaffold surrounding it, and the position of the 19F nucleus relative to the metal center. One intriguing prospect in 19F magnetic resonance molecular imaging is to design responsive agents that can serve to provide a read out biological activity, including the activity of enzymes, redox activity, the activity of ions, etc. Paramagnetic agents are well suited for this activity-based sensing as metal complexes can be designed to respond to specific biological activities and give a corresponding 19F response that results from changes in the metal complex structure and subsequently PRE/PCS. Broadly speaking, when designing paramagnetic 19F MR biosensors, one can envision that in response to changes in analyte activity, the number of unpaired electrons of the metal changes or the ligand conformation/chemical composition changes. This Account highlights activity-based probes from the Que lab that harness paramagnetic metals to modulate 19F signal. We discuss probes that use conversion from Cu2+ to Cu+ in response to reducing environments to dequench the 19F MR signal. Probes in which oxidants convert Co2+ to Co3+, resulting in chemical shift responses, are also described. Finally, we explore our foray into using Ni2+ coordination switching to furnish probes with different 19F signals when they are converted between 4-coordinate square planar and higher coordination numbers. A major barrier for 19F MR molecular imaging is in vivo application, as signal sensitivity is relatively low, requiring long imaging times to detect imaging agents. Nanoparticle and macromolecular agents show promise due to their higher fluorine density and longer circulation times; however, their analyte scope is limited to analytes that induce cleavage events. A grand challenge for researchers in this area is adapting lessons learned from small molecule paramagnetic probes with promising in vitro activities for the development of probes with enhanced in vivo utility for basic biological and clinical applications.
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Affiliation(s)
- Da Xie
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Meng Yu
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Rahul T. Kadakia
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
| | - Emily L. Que
- Department of Chemistry, University of Texas at Austin, Austin, Texas 78712-1224, United States
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20
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Botár R, Molnár E, Trencsényi G, Kiss J, Kálmán FK, Tircsó G. Stable and Inert Mn(II)-Based and pH-Responsive Contrast Agents. J Am Chem Soc 2020; 142:1662-1666. [DOI: 10.1021/jacs.9b09407] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Richárd Botár
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary
| | - Enikő Molnár
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary
| | - György Trencsényi
- Division of Nuclear Medicine, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
| | - János Kiss
- Division of Nuclear Medicine, Department of Medical Imaging, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary
- Mediso Ltd., H-4032 Debrecen, Hungary
| | - Ferenc K. Kálmán
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary
| | - Gyula Tircsó
- Department of Physical Chemistry, University of Debrecen, H-4032 Debrecen, Hungary
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21
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Gambino G, Gambino T, Pohmann R, Angelovski G. A ratiometric 19F MR-based method for the quantification of Ca2+ using responsive paramagnetic probes. Chem Commun (Camb) 2020; 56:3492-3495. [DOI: 10.1039/c9cc09977h] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A custom made lanthanide complex with a high number of fluorine atoms was used to develop a quantitative method to assess calcium ion concentration by means of 19F chemical shift imaging.
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Affiliation(s)
- Giuseppe Gambino
- MR Neuroimaging Agents
- MPI for Biological Cybernetics
- Tuebingen
- Germany
| | - Tanja Gambino
- MR Neuroimaging Agents
- MPI for Biological Cybernetics
- Tuebingen
- Germany
| | - Rolf Pohmann
- High-Field Magnetic Resonance
- MPI for Biological Cybernetics
- Tuebingen
- Germany
| | - Goran Angelovski
- MR Neuroimaging Agents
- MPI for Biological Cybernetics
- Tuebingen
- Germany
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22
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Pujales-Paradela R, Savić T, Pérez-Lourido P, Esteban-Gómez D, Angelovski G, Botta M, Platas-Iglesias C. Lanthanide Complexes with 1H paraCEST and 19F Response for Magnetic Resonance Imaging Applications. Inorg Chem 2019; 58:7571-7583. [DOI: 10.1021/acs.inorgchem.9b00869] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Rosa Pujales-Paradela
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
| | - Tanja Savić
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Paulo Pérez-Lourido
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidade de Vigo, As Lagoas, Marcosende, 36310 Pontevedra, Spain
| | - David Esteban-Gómez
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
| | - Carlos Platas-Iglesias
- Centro de Investigacións Científicas Avanzadas and Departamento de Química, Facultade de Ciencias, Universidade da Coruña, 15071 Coruña, Galicia Spain
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23
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Pujales‐Paradela R, Savić T, Esteban‐Gómez D, Angelovski G, Carniato F, Botta M, Platas‐Iglesias C. Gadolinium(III)‐Based Dual1H/19F Magnetic Resonance Imaging Probes. Chemistry 2019; 25:4782-4792. [DOI: 10.1002/chem.201806192] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Rosa Pujales‐Paradela
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
| | - Tanja Savić
- MR Neuroimaging AgentsMax Planck Institute for Biological Cybernetics Tübingen Germany
| | - David Esteban‐Gómez
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
| | - Goran Angelovski
- MR Neuroimaging AgentsMax Planck Institute for Biological Cybernetics Tübingen Germany
| | - Fabio Carniato
- Dipartimento di Scienze e Innovazione TecnologicaUniversità del Piemonte Orientale “A. Avogadro” Viale T. Michel 11 15121 Alessandria Italy
| | - Mauro Botta
- Dipartimento di Scienze e Innovazione TecnologicaUniversità del Piemonte Orientale “A. Avogadro” Viale T. Michel 11 15121 Alessandria Italy
| | - Carlos Platas‐Iglesias
- Centro de Investigacións Científicas Avanzadas (CICA) and Departamento, de QuímicaFacultade de CienciasUniversidade da Coruña 15071 A Coruña Galicia Spain
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24
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Enriquez JS, Yu M, Bouley BS, Xie D, Que EL. Copper(ii) complexes for cysteine detection using 19F magnetic resonance. Dalton Trans 2018; 47:15024-15030. [PMID: 30303220 DOI: 10.1039/c8dt03780a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cysteine plays an essential role in maintaining cellular redox homeostasis and perturbations in cysteine concentration are associated with cardiovascular disease, liver disease, and cancer. 19F MRI is a promising modality for detecting cysteine in biology due to its high tissue penetration and negligible biological background signal. Herein we report fluorinated macrocyclic copper complexes that display a 19F NMR/MRI turn-on response following reduction of the Cu(ii) complexes by cysteine. The reactivity with cysteine was studied by monitoring the appearance of a robust diamagnetic 19F signal following addition of cysteine in conjunction with UV-vis and EPR spectroscopies. Importantly, complexes with -CH2CF3 tags display good water solubility. Studies with this complex in HeLa cells demonstrate the applicability of these probes to detect cysteine in complex biological environments.
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Affiliation(s)
- José S Enriquez
- Department of Chemistry, The University of Texas at Austin, 105 E. 24th St Stop A5300, Austin, Texas 78712, USA.
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25
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Affiliation(s)
- Zhenchuang Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Chao Liu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Shujuan Zhao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Si Chen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai 200032, China
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26
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Suturina EA, Mason K, Geraldes CFGC, Chilton NF, Parker D, Kuprov I. Lanthanide-induced relaxation anisotropy. Phys Chem Chem Phys 2018; 20:17676-17686. [PMID: 29932451 DOI: 10.1039/c8cp01332b] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Lanthanide ions accelerate nuclear spin relaxation by two primary mechanisms: dipolar and Curie. Both are commonly assumed to depend on the length of the lanthanide-nucleus vector, but not on its direction. Here we show experimentally that this is wrong - careful proton relaxation data analysis in a series of isostructural lanthanide complexes (Ln = Tb, Dy, Ho, Er, Tm, Yb) reveals angular dependence in both Curie and dipolar relaxation. The reasons are: (a) that magnetic susceptibility anisotropy can be of the same order of magnitude as the isotropic part (contradicting the unstated assumption in Guéron's theory of the Curie relaxation process), and (b) that zero-field splitting can be much stronger than the electron Zeeman interaction (Bloembergen's original theory of the lanthanide-induced dipolar relaxation process makes the opposite assumption). These factors go beyond the well researched cross-correlation effects; they alter the relaxation theory treatment and make strong angular dependencies appear in the nuclear spin relaxation rates. Those dependencies are impossible to ignore - this is now demonstrated both theoretically and experimentally, and suggests that a major revision is needed of the way lanthanide-induced relaxation data are used in structural biology.
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Affiliation(s)
- Elizaveta A Suturina
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, UK.
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27
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Yang S, Zeng Q, Guo Q, Chen S, Liu H, Liu M, McMahon MT, Zhou X. Detection and differentiation of Cys, Hcy and GSH mixtures by 19F NMR probe. Talanta 2018; 184:513-519. [DOI: 10.1016/j.talanta.2018.03.039] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 03/02/2018] [Accepted: 03/14/2018] [Indexed: 01/10/2023]
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28
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Peterson KL, Srivastava K, Pierre VC. Fluorinated Paramagnetic Complexes: Sensitive and Responsive Probes for Magnetic Resonance Spectroscopy and Imaging. Front Chem 2018; 6:160. [PMID: 29876342 PMCID: PMC5974164 DOI: 10.3389/fchem.2018.00160] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 04/20/2018] [Indexed: 12/11/2022] Open
Abstract
Fluorine magnetic resonance spectroscopy (MRS) and magnetic resonance imaging (MRI) of chemical and physiological processes is becoming more widespread. The strength of this technique comes from the negligible background signal in in vivo19F MRI and the large chemical shift window of 19F that enables it to image concomitantly more than one marker. These same advantages have also been successfully exploited in the design of responsive 19F probes. Part of the recent growth of this technique can be attributed to novel designs of 19F probes with improved imaging parameters due to the incorporation of paramagnetic metal ions. In this review, we provide a description of the theories and strategies that have been employed successfully to improve the sensitivity of 19F probes with paramagnetic metal ions. The Bloch-Wangsness-Redfield theory accurately predicts how molecular parameters such as internuclear distance, geometry, rotational correlation times, as well as the nature, oxidation state, and spin state of the metal ion affect the sensitivity of the fluorine-based probes. The principles governing the design of responsive 19F probes are subsequently described in a "how to" guide format. Examples of such probes and their advantages and disadvantages are highlighted through a synopsis of the literature.
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Affiliation(s)
- Katie L Peterson
- Department of Chemistry, Bemidji State University, Bemidji, MN, United States
| | - Kriti Srivastava
- Department of Chemistry, University of Minnesota, Minneapolis, MN, United States
| | - Valérie C Pierre
- Department of Chemistry, University of Minnesota, Minneapolis, MN, United States
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29
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Prior TJ, Savoie H, Boyle RW, Murray BS. pH-Dependent Modulation of Reactivity in Ruthenium(II) Organometallics. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00868] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Timothy J. Prior
- Chemistry, School of Mathematics and
Physical Sciences, University of Hull, Hull HU6 7RX, U.K
| | - Huguette Savoie
- Chemistry, School of Mathematics and
Physical Sciences, University of Hull, Hull HU6 7RX, U.K
| | - Ross W. Boyle
- Chemistry, School of Mathematics and
Physical Sciences, University of Hull, Hull HU6 7RX, U.K
| | - Benjamin S. Murray
- Chemistry, School of Mathematics and
Physical Sciences, University of Hull, Hull HU6 7RX, U.K
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30
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Abstract
This paper presents a detailed analysis of the pseudocontact shift (PCS) field induced by a mobile spin label that is viewed as a probability density distribution with an associated effective magnetic susceptibility anisotropy. It is demonstrated that non-spherically symmetric density can lead to significant deviations from the commonly used point dipole approximation for the PCS. Analytical and numerical solutions are presented for the general partial differential equation that describes the non-point case. It is also demonstrated that it is possible, with some reasonable approximations, to reconstruct paramagnetic centre probability distributions from the experimental PCS data.
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Affiliation(s)
- Elizaveta A Suturina
- School of Chemistry, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, UK.
| | - Ilya Kuprov
- School of Chemistry, University of Southampton, Highfield Campus, Southampton, SO17 1BJ, UK.
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31
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Blahut J, Bernášek K, Gálisová A, Herynek V, Císařová I, Kotek J, Lang J, Matějková S, Hermann P. Paramagnetic 19F Relaxation Enhancement in Nickel(II) Complexes of N-Trifluoroethyl Cyclam Derivatives and Cell Labeling for 19F MRI. Inorg Chem 2017; 56:13337-13348. [DOI: 10.1021/acs.inorgchem.7b02119] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jan Blahut
- Department of Inorganic
Chemistry, Faculty of Science, Charles University (Univerzita Karlova), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Karel Bernášek
- Department of Low
Temperature Physics, Faculty of Mathematics and Physics, Charles University (Univerzita Karlova), V Holešovičkách
2, 180 00 Prague 8, Czech Republic
| | - Andrea Gálisová
- Department of Radiodiagnostic
and Interventional Radiology, Magnetic Resonance Unit, Institute for Clinical and Experimental Medicine, Vídeňská 1958/9, 140 21 Prague 4, Czech Republic
| | - Vít Herynek
- Department of Radiodiagnostic
and Interventional Radiology, Magnetic Resonance Unit, Institute for Clinical and Experimental Medicine, Vídeňská 1958/9, 140 21 Prague 4, Czech Republic
| | - Ivana Císařová
- Department of Inorganic
Chemistry, Faculty of Science, Charles University (Univerzita Karlova), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Jan Kotek
- Department of Inorganic
Chemistry, Faculty of Science, Charles University (Univerzita Karlova), Hlavova 2030, 128 43 Prague 2, Czech Republic
| | - Jan Lang
- Department of Low
Temperature Physics, Faculty of Mathematics and Physics, Charles University (Univerzita Karlova), V Holešovičkách
2, 180 00 Prague 8, Czech Republic
| | - Stanislava Matějková
- Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Petr Hermann
- Department of Inorganic
Chemistry, Faculty of Science, Charles University (Univerzita Karlova), Hlavova 2030, 128 43 Prague 2, Czech Republic
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32
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Li T, Liao Y, Jiang X, Mu D, Hou X, Zhang C, Deng P. pH detection in biological samples by 1D and 2D 1H- 31P NMR. Talanta 2017; 178:538-544. [PMID: 29136859 DOI: 10.1016/j.talanta.2017.09.085] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 09/19/2017] [Accepted: 09/30/2017] [Indexed: 11/29/2022]
Abstract
The chemical shifts of several important endogenous phosphorus compounds under different pH conditions were explored, including adenosine-5'-triphosphate, adenosine-5'-diphosphate, adenosine-5'-monophosphate, phosphorylcholine and phosphorylethanolamine. Their 31P NMR and 1H NMR chemical shifts were all pH-sensitive in the similar pH range. Two dimensional (2D) 1H-31P NMR spectra were found helpful to identify these endogenous phosphorus markers in biological samples from rather complicated NMR spectra. Herein, for the first time, a pH sensor based on 2D 1H-31P NMR was established and applied to biological samples analysis with pH values determined in good agreement with those by potentiometric method. Apart from being simple, green, rapid and less sample-consuming, information concerning both the endogenous phosphorus markers and pH status could be attained in a single NMR run, which demonstrated the great potential of this method in rare sample analysis and even disease diagnosis.
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Affiliation(s)
- Ting Li
- College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China
| | - Yong Liao
- Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Xiaoyan Jiang
- Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Di Mu
- Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China
| | - Xiandeng Hou
- College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China; Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Chunchun Zhang
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China
| | - Pengchi Deng
- Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, China.
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33
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Finney KLNA, Harnden AC, Rogers NJ, Senanayake PK, Blamire AM, O'Hogain D, Parker D. Simultaneous Triple Imaging with Two PARASHIFT Probes: Encoding Anatomical, pH and Temperature Information using Magnetic Resonance Shift Imaging. Chemistry 2017; 23:7976-7989. [DOI: 10.1002/chem.201700447] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 03/10/2017] [Indexed: 01/10/2023]
Affiliation(s)
| | - Alice C. Harnden
- Department of Chemistry; Durham University; South Road Durham DH1 3LE UK
| | - Nicola J. Rogers
- Department of Chemistry; Durham University; South Road Durham DH1 3LE UK
| | | | - Andrew M. Blamire
- Institute of Cellular Medicine and Newcastle MR Centre; Newcastle University; Newcastle upon Tyne NE4 5PL UK
| | - Dara O'Hogain
- Institute of Cellular Medicine and Newcastle MR Centre; Newcastle University; Newcastle upon Tyne NE4 5PL UK
| | - David Parker
- Department of Chemistry; Durham University; South Road Durham DH1 3LE UK
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34
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Sarkar A, Biton IE, Neeman M, Datta A. A macrocyclic 19 F-MR based probe for Mn 2+ sensing. INORG CHEM COMMUN 2017. [DOI: 10.1016/j.inoche.2017.02.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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35
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Mason K, Rogers NJ, Suturina EA, Kuprov I, Aguilar JA, Batsanov AS, Yufit DS, Parker D. PARASHIFT Probes: Solution NMR and X-ray Structural Studies of Macrocyclic Ytterbium and Yttrium Complexes. Inorg Chem 2017; 56:4028-4038. [DOI: 10.1021/acs.inorgchem.6b02291] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Kevin Mason
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Nicola J. Rogers
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Elizaveta A. Suturina
- School
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Ilya Kuprov
- School
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Juan A. Aguilar
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Andrei S. Batsanov
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - Dmitry S. Yufit
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
| | - David Parker
- Department of Chemistry, Durham University, South Road, Durham DH1 3LE, U.K
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36
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Thorarinsdottir AE, Gaudette AI, Harris TD. Spin-crossover and high-spin iron(ii) complexes as chemical shift 19F magnetic resonance thermometers. Chem Sci 2017; 8:2448-2456. [PMID: 28694955 PMCID: PMC5477811 DOI: 10.1039/c6sc04287b] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Accepted: 12/20/2016] [Indexed: 12/22/2022] Open
Abstract
The potential utility of paramagnetic transition metal complexes as chemical shift 19F magnetic resonance (MR) thermometers is demonstrated. Further, spin-crossover FeII complexes are shown to provide much higher temperature sensitivity than do the high-spin analogues, owing to the variation of spin state with temperature in the former complexes. This approach is illustrated through a series of FeII complexes supported by symmetrically and asymmetrically substituted 1,4,7-triazacyclononane ligand scaffolds bearing 3-fluoro-2-picolyl derivatives as pendent groups (L x ). Variable-temperature magnetic susceptibility measurements, in conjunction with UV-vis and NMR data, show thermally-induced spin-crossover for [Fe(L1)]2+ in H2O, with T1/2 = 52(1) °C. Conversely, [Fe(L2)]2+ remains high-spin in the temperature range 4-61 °C. Variable-temperature 19F NMR spectra reveal the chemical shifts of the complexes to exhibit a linear temperature dependence, with the two peaks of the spin-crossover complex providing temperature sensitivities of +0.52(1) and +0.45(1) ppm per °C in H2O. These values represent more than two-fold higher sensitivity than that afforded by the high-spin analogue, and ca. 40-fold higher sensitivity than diamagnetic perfluorocarbon-based thermometers. Finally, these complexes exhibit excellent stability in a physiological environment, as evidenced by 19F NMR spectra collected in fetal bovine serum.
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Affiliation(s)
- Agnes E Thorarinsdottir
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , IL 60208-3113 , USA .
| | - Alexandra I Gaudette
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , IL 60208-3113 , USA .
| | - T David Harris
- Department of Chemistry , Northwestern University , 2145 Sheridan Road , Evanston , IL 60208-3113 , USA .
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37
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Srivastava K, Weitz EA, Peterson KL, Marjańska M, Pierre VC. Fe- and Ln-DOTAm-F12 Are Effective Paramagnetic Fluorine Contrast Agents for MRI in Water and Blood. Inorg Chem 2017; 56:1546-1557. [PMID: 28094930 DOI: 10.1021/acs.inorgchem.6b02631] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A series of fluorinated macrocyclic complexes, M-DOTAm-F12, where M is LaIII, EuIII, GdIII, TbIII, DyIII, HoIII, ErIII, TmIII, YbIII, and FeII, was synthesized, and their potential as fluorine magnetic resonance imaging (MRI) contrast agents was evaluated. The high water solubility of these complexes and the presence of a single fluorine NMR signal, two necessary parameters for in vivo MRI, are substantial advantages over currently used organic polyfluorocarbons and other reported paramagnetic 19F probes. Importantly, the sensitivity of the paramagnetic probes on a per fluorine basis is at least 1 order of magnitude higher than that of diamagnetic organic probes. This increased sensitivity is due to a substantial-up to 100-fold-decrease in the longitudinal relaxation time (T1) of the fluorine nuclei. The shorter T1 allows for a greater number of scans to be obtained in an equivalent time frame. The sensitivity of the fluorine probes is proportional to the T2/T1 ratio. In water, the optimal metal complexes for imaging applications are those containing HoIII and FeII, and to a lesser extent TmIII and YbIII. Whereas T1 of the lanthanide complexes are little affected by blood, the T2 are notably shorter in blood than in water. The sensitivity of Ln-DOTAm-F12 complexes is lower in blood than in water, such that the most sensitive complex in water, HoIII-DOTAm-F12, could not be detected in blood. TmIII yielded the most sensitive lanthanide fluorine probe in blood. Notably, the relaxation times of the fluorine nuclei of FeII-DOTAm-F12 are similar in water and in blood. That complex has the highest T2/T1 ratio (0.57) and the lowest limit of detection (300 μM) in blood. The combination of high water solubility, single fluorine signal, and high T2/T1 of M-DOTAm-F12 facilitates the acquisition of three-dimensional magnetic resonance images.
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Affiliation(s)
- Kriti Srivastava
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Evan A Weitz
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Katie L Peterson
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Małgorzata Marjańska
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Valérie C Pierre
- Department of Chemistry and ‡Center for Magnetic Resonance Research and Department of Radiology, University of Minnesota , Minneapolis, Minnesota 55455, United States
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38
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Gaudette AI, Thorarinsdottir AE, Harris TD. pH-Dependent spin state population and 19F NMR chemical shift via remote ligand protonation in an iron(ii) complex. Chem Commun (Camb) 2017; 53:12962-12965. [DOI: 10.1039/c7cc08158h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
An FeII complex that features a pH-dependent spin state population and 19F chemical shift, by virtue of a variable ligand protonation state, is described.
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39
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Angelovski G. What We Can Really Do with Bioresponsive MRI Contrast Agents. Angew Chem Int Ed Engl 2016; 55:7038-46. [DOI: 10.1002/anie.201510956] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 01/14/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Goran Angelovski
- MR Neuroimaging Agents; Max Planck Institute for Biological Cybernetics; Spemannstrasse 41 72076 Tübingen Germany
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40
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Angelovski G. Biosensitive Kontrastmittel für die Magnetresonanztomographie - was wir mit ihnen wirklich tun können. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201510956] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Goran Angelovski
- MRT-Kontrastmittel für Neuroimaging; Max-Planck-Institut für biologische Kybernetik; Spemannstraße 41 72076 Tübingen Deutschland
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41
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Jensen PR, Meier S. Hyperpolarised organic phosphates as NMR reporters of compartmental pH. Chem Commun (Camb) 2016; 52:2288-91. [DOI: 10.1039/c5cc09790h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
When formed in defined cellular compartments from exogenous hyperpolarised13C substrates, metabolites yield correlations of compartmental pH and catalytic activity.
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Affiliation(s)
- Pernille Rose Jensen
- Technical University of Denmark
- Department of Electrical Engineering
- DK-2800 Kgs. Lyngby
- Denmark
- Albeda Research
| | - Sebastian Meier
- Technical University of Denmark
- Department of Chemistry
- DK-2800 Kgs. Lyngby
- Denmark
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42
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Blahut J, Hermann P, Gálisová A, Herynek V, Císařová I, Tošner Z, Kotek J. Nickel(ii) complexes of N-CH2CF3 cyclam derivatives as contrast agents for 19F magnetic resonance imaging. Dalton Trans 2016; 45:474-8. [DOI: 10.1039/c5dt04138d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel(ii) complexes of N,N′′-2,2,2-trifluoroethyl cyclam derivatives show significant 19F NMR relaxation rate enhancement useful for 19F MRI imaging.
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Affiliation(s)
- Jan Blahut
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University (Univerzita Karlova)
- 128 43 Prague 2
- Czech Republic
| | - Petr Hermann
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University (Univerzita Karlova)
- 128 43 Prague 2
- Czech Republic
| | - Andrea Gálisová
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- 140 21 Czech Republic
| | - Vít Herynek
- Department of Radiodiagnostic and Interventional Radiology
- Magnetic Resonance Unit
- Institute for Clinical and Experimental Medicine
- Prague 4
- 140 21 Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University (Univerzita Karlova)
- 128 43 Prague 2
- Czech Republic
| | - Zdeněk Tošner
- NMR Laboratory
- Faculty of Science
- Charles University (Univerzita Karlova)
- 128 43 Prague 2
- Czech Republic
| | - Jan Kotek
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University (Univerzita Karlova)
- 128 43 Prague 2
- Czech Republic
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43
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Perruchoud LH, Jones MD, Sutrisno A, Zamble DB, Simpson AJ, Zhang XA. A ratiometric NMR pH sensing strategy based on a slow-proton-exchange (SPE) mechanism. Chem Sci 2015; 6:6305-6311. [PMID: 30090248 PMCID: PMC6054103 DOI: 10.1039/c5sc02145f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2015] [Accepted: 07/18/2015] [Indexed: 12/16/2022] Open
Abstract
Real time and non-invasive detection of pH in live biological systems is crucial for understanding the physiological role of acid-base homeostasis and for detecting pathological conditions associated with pH imbalance. One method to achieve in vivo pH monitoring is NMR. Conventional NMR methods, however, mainly utilize molecular sensors displaying pH-dependent chemical shift changes, which are vulnerable to multiple pH-independent factors. Here, we present a novel ratiometric strategy for sensitive and accurate pH sensing based on a small synthetic molecule, SPE1, which exhibits exceptionally slow proton exchange on the NMR time scale. Each protonation state of the sensor displays distinct NMR signals and the ratio of these signals affords precise pH values. In contrast to standard NMR methods, this ratiometric mechanism is not based on a chemical shift change, and SPE1 binds protons with high selectivity, resulting in accurate measurements. SPE1 was used to measure the pH in a single oocyte as well as in bacterial cultures, demonstrating the versatility of this method and establishing the foundation for broad biological applications.
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Affiliation(s)
- L H Perruchoud
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - M D Jones
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
| | - A Sutrisno
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - D B Zamble
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Biochemistry , University of Toronto , Toronto , ON M5S 1A8 , Canada
| | - A J Simpson
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
| | - X-A Zhang
- Department of Chemistry , University of Toronto , Toronto , ON M5S 3H6 , Canada . ; ;
- Department of Environmental and Physical Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
- Department of Biological Sciences , University of Toronto Scarborough , Toronto , ON M1C 1A4 , Canada
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44
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Yuan Y, Ge S, Sun H, Dong X, Zhao H, An L, Zhang J, Wang J, Hu B, Liang G. Intracellular Self-Assembly and Disassembly of (19)F Nanoparticles Confer Respective "Off" and "On" (19)F NMR/MRI Signals for Legumain Activity Detection in Zebrafish. ACS NANO 2015; 9:5117-5124. [PMID: 25868488 DOI: 10.1021/acsnano.5b00287] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
(19)F MRI has higher selectivity but lower sensitivity than (1)H MRI for in vivo diagnosis. Therefore, to avoid using a high injection dose of the (19)F probe while, in the meantime, maintaining the high sensitivity of (19)F MRI has remained challenging. Local self-assembly and disassembly of (19)F nanoparticles could be one of the "smart" strategies to achieve this goal. Herein, we report a dual-functional probe 1 for glutathione (GSH)-controlled self-assembly and subsequent legumain (Lgmn)-controlled disassembly of its nanoparticles (i.e., 1-NPs). Self-assembly and disassembly of 1-NPs confer (19)F magnetic resonance (MR) signals "off" and "on", respectively. Employing this strategy, we successfully applied 1 for consecutive detections of GSH and Lgmn in vitro and in cells, imaging Lgmn activity in HEK 293T tumors in zebrafish at a low dosage under 14.1 T.
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Affiliation(s)
| | | | - Hongbin Sun
- §High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei, Anhui 230031, China
| | | | - Hongxin Zhao
- §High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei, Anhui 230031, China
| | | | | | - Junfeng Wang
- §High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, 350 Shushanhu Road, Hefei, Anhui 230031, China
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45
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Hu H, Huang N, Yi P, Hui YH, Dally RD, Ehlhardt WJ, Kulanthaivel P. Utilizing19F NMR to investigate drug disposition early in drug discovery. Xenobiotica 2015; 45:1081-91. [DOI: 10.3109/00498254.2015.1040866] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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46
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Tirotta I, Dichiarante V, Pigliacelli C, Cavallo G, Terraneo G, Bombelli FB, Metrangolo P, Resnati G. (19)F magnetic resonance imaging (MRI): from design of materials to clinical applications. Chem Rev 2014; 115:1106-29. [PMID: 25329814 DOI: 10.1021/cr500286d] [Citation(s) in RCA: 327] [Impact Index Per Article: 32.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Ilaria Tirotta
- Laboratory of Nanostructured Fluorinated Materials (NFMLab), Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta" and ‡Fondazione Centro Europeo Nanomedicina, Politecnico di Milano , Milan 20131, Italy
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47
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Takahashi W, Bobko AA, Dhimitruka I, Hirata H, Zweier JL, Samouilov A, Khramtsov VV. Proton-Electron Double-Resonance Imaging of pH using phosphonated trityl probe. APPLIED MAGNETIC RESONANCE 2014; 45:817-826. [PMID: 25530673 PMCID: PMC4268155 DOI: 10.1007/s00723-014-0570-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Variable Radio Frequency Proton-Electron Double-Resonance Imaging (VRF PEDRI) enables extracting a functional map from a limited number of images acquired at pre-selected EPR frequencies using specifically designed paramagnetic probes with high quality spatial resolution and short acquisition times. In this work we explored potential of VRF PEDRI for pH mapping of aqueous samples using recently synthesized pH-sensitive phosphonated trityl radical, pTR. The ratio of Overhauser enhancements measured at each pixel at two different excitation frequencies corresponding to the resonances of protonated and deprotonated forms of pTR probe allows for a pH map extraction. Long relaxation times of pTR allow for pH mapping at EPR irradiation power as low as 1.25 W during 130 s acquisition time with spatial resolution of about 1 mm. This is particularly important for in vivo applications enabling one to avoid sample overheating by reducing RF power deposition.
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Affiliation(s)
- Wataru Takahashi
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine and Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, OH, USA ; Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
| | - Andrey A Bobko
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine and Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, OH, USA
| | - Ilirian Dhimitruka
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine and Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, OH, USA
| | - Hiroshi Hirata
- Division of Bioengineering and Bioinformatics, Graduate School of Information Science and Technology, Hokkaido University, Sapporo, Japan
| | - Jay L Zweier
- Division of Cardiology and Dorothy M. Davis Heart & Lung Research Institute, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Alexandre Samouilov
- Division of Cardiology and Dorothy M. Davis Heart & Lung Research Institute, Department of Internal Medicine, The Ohio State University, Columbus, OH, USA
| | - Valery V Khramtsov
- Division of Pulmonary, Allergy, Critical Care & Sleep Medicine, Department of Internal Medicine and Dorothy M. Davis Heart & Lung Research Institute, The Ohio State University, Columbus, OH, USA
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48
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Synthesis and characterization of [S2MoS2Cu(n-SPhF)]2−(n=o, m, p) clusters: Potential 19F-NMR structural probes for Orange Protein. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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49
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Bruemmer KJ, Merrikhihaghi S, Lollar CT, Morris SNS, Bauer JH, Lippert AR. 19F magnetic resonance probes for live-cell detection of peroxynitrite using an oxidative decarbonylation reaction. Chem Commun (Camb) 2014; 50:12311-4. [DOI: 10.1039/c4cc04292a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We have developed 19F NMR probes for non-invasive monitoring of ONOO− produced by A549 cells using novel oxidative decarbonylation chemistry.
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Affiliation(s)
| | | | | | | | - Johannes H. Bauer
- Department of Biological Sciences
- Southern Methodist University
- Dallas, USA
- Center for Drug Discovery
- Design, and Delivery (CD4)
| | - Alexander R. Lippert
- Department of Chemistry
- Southern Methodist University
- Dallas, USA
- Center for Drug Discovery
- Design, and Delivery (CD4)
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50
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Characterisation and evaluation of paramagnetic fluorine labelled glycol chitosan conjugates for 19F and 1H magnetic resonance imaging. J Biol Inorg Chem 2013; 19:215-27. [DOI: 10.1007/s00775-013-1028-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 07/22/2013] [Indexed: 12/29/2022]
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