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Konwar K, Chaturvedi A, Chakraborty R, Sharma P, Kumar D, Kaushik SD, Babu PD, Mukhopadhyay R, Lodha S, Sen D, Deb P. Interacting Trimagnetic Ensembles for Enhanced Magnetic Resonance Transverse Relaxivity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:15281-15292. [PMID: 38989856 DOI: 10.1021/acs.langmuir.4c01864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
An ensemble of nanosystems can be considered to improve magnetic resonance imaging (MRI) transverse relaxivity. Herein, an interacting superparamagnetic competing structure of an isotropic-anisotropic trimagnetic hybrid nanosystem, γ-Fe2O3@δ-MnO2@NiFe2O4, is considered for MRI relaxivity exploration. The interacting superparamagnetic system reveals fascinating dynamic magnetic behavior, where flower-shaped two-dimensional flakes are decorated over nanoparticles. The hybrid nanosystem exhibits modulated shape anisotropy with spin blocking and energy barrier broadening, which help in achieving faster MR transverse relaxivity. The hierarchical architecture ensemble of the trimagnetic landscape shows effective MR transverse relaxivity with a transverse (r2)/longitudinal (r1) relaxivity of 61.5 and potential cell viability. The competing trimagnetic system with regulated activation energy is found to be the underlying reason for such signal enhancement in MRI contrast efficiency. Hence, this study displays a novel pathway correlating MR transverse relaxivity with dynamic magnetic behavior and competing landscape of hierarchical trimagnetic ensembles.
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Affiliation(s)
- Korobi Konwar
- Department of Physics, Tezpur University (Central University), Tezpur 784028, India
| | | | - Rituraj Chakraborty
- Department of Molecular Biology and Biotechnology, Tezpur University (Central University), Tezpur 784028, India
| | - Pooja Sharma
- Department of Electrical Engineering, IIT Bombay, Mumbai 400076, India
| | - Dinesh Kumar
- Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Som Datta Kaushik
- UGC-DAE Consortium for Scientific Research, Bhabha Atomic Research Centre, Mumbai Centre, R-5 Shed, Mumbai 400085, India
| | - Peram Delli Babu
- UGC-DAE Consortium for Scientific Research, Bhabha Atomic Research Centre, Mumbai Centre, R-5 Shed, Mumbai 400085, India
| | - Rupak Mukhopadhyay
- Department of Molecular Biology and Biotechnology, Tezpur University (Central University), Tezpur 784028, India
| | - Saurabh Lodha
- Department of Electrical Engineering, IIT Bombay, Mumbai 400076, India
| | - Debasis Sen
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Pritam Deb
- Department of Physics, Tezpur University (Central University), Tezpur 784028, India
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2
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Miller ADC, Ozbakir HF, Mukherjee A. Calcium-responsive contrast agents for functional magnetic resonance imaging. ACTA ACUST UNITED AC 2021; 2:021301. [PMID: 34085055 DOI: 10.1063/5.0041394] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 03/15/2021] [Indexed: 02/07/2023]
Abstract
Calcium ions represent one of the key second messengers accompanying neural activity and synaptic signaling. Accordingly, dynamic imaging of calcium fluctuations in living organisms represents a cornerstone technology for discovering neural mechanisms that underlie memory, determine behavior, and modulate emotional states as well as how these mechanisms are perturbed by neurological disease and brain injury. While optical technologies are well established for high resolution imaging of calcium dynamics, physical limits on light penetration hinder their application for whole-brain imaging in intact vertebrates. Unlike optics, magnetic resonance imaging (MRI) enables noninvasive large-scale imaging across vertebrates of all sizes. This has motivated the development of several sensors that leverage innovative physicochemical mechanisms to sensitize MRI contrast to intracellular and extracellular changes in calcium. Here, we review the current state-of-the-art in MRI-based calcium sensors, focusing on fundamental aspects of sensor performance, in vivo applications, and challenges related to sensitivity. We also highlight how innovations at the intersection of reporter gene technology and gene delivery open potential opportunities for mapping calcium activity in genetically targeted cells, complementing the benefits of small molecule probes and nanoparticle sensors.
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Affiliation(s)
- Austin D C Miller
- Biomolecular Science and Engineering, University of California, Santa Barbara, California 93106, USA
| | - Harun F Ozbakir
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA
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3
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Limbeck A, Brunnbauer L, Lohninger H, Pořízka P, Modlitbová P, Kaiser J, Janovszky P, Kéri A, Galbács G. Methodology and applications of elemental mapping by laser induced breakdown spectroscopy. Anal Chim Acta 2021; 1147:72-98. [DOI: 10.1016/j.aca.2020.12.054] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 10/22/2022]
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4
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Li X, Sun Y, Ma L, Liu G, Wang Z. The Renal Clearable Magnetic Resonance Imaging Contrast Agents: State of the Art and Recent Advances. Molecules 2020; 25:E5072. [PMID: 33139643 PMCID: PMC7662352 DOI: 10.3390/molecules25215072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 10/24/2020] [Accepted: 10/26/2020] [Indexed: 02/07/2023] Open
Abstract
The advancements of magnetic resonance imaging contrast agents (MRCAs) are continuously driven by the critical needs for early detection and diagnosis of diseases, especially for cancer, because MRCAs improve diagnostic accuracy significantly. Although hydrophilic gadolinium (III) (Gd3+) complex-based MRCAs have achieved great success in clinical practice, the Gd3+-complexes have several inherent drawbacks including Gd3+ leakage and short blood circulation time, resulting in the potential long-term toxicity and narrow imaging time window, respectively. Nanotechnology offers the possibility for the development of nontoxic MRCAs with an enhanced sensitivity and advanced functionalities, such as magnetic resonance imaging (MRI)-guided synergistic therapy. Herein, we provide an overview of recent successes in the development of renal clearable MRCAs, especially nanodots (NDs, also known as ultrasmall nanoparticles (NPs)) by unique advantages such as high relaxivity, long blood circulation time, good biosafety, and multiple functionalities. It is hoped that this review can provide relatively comprehensive information on the construction of novel MRCAs with promising clinical translation.
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Affiliation(s)
- Xiaodong Li
- Department of Radiology, China-Japan Union Hospital of Jilin University, Xiantai Street, Changchun 130033, China;
| | - Yanhong Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; (Y.S.); (L.M.)
| | - Lina Ma
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; (Y.S.); (L.M.)
| | - Guifeng Liu
- Department of Radiology, China-Japan Union Hospital of Jilin University, Xiantai Street, Changchun 130033, China;
| | - Zhenxin Wang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China; (Y.S.); (L.M.)
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5
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An electric-field-responsive paramagnetic contrast agent enhances the visualization of epileptic foci in mouse models of drug-resistant epilepsy. Nat Biomed Eng 2020; 5:278-289. [PMID: 32989285 DOI: 10.1038/s41551-020-00618-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 08/27/2020] [Indexed: 02/03/2023]
Abstract
For patients with drug-resistant focal epilepsy, excision of the epileptogenic zone is the most effective treatment approach. However, the surgery is less effective in the 15-30% of patients whose lesions are not distinct when visualized by magnetic resonance imaging (MRI). Here, we show that an intravenously administered MRI contrast agent consisting of a paramagnetic polymer coating encapsulating a superparamagnetic cluster of ultrasmall superparamagnetic iron oxide crosses the blood-brain barrier and improves lesion visualization with high sensitivity and target-to-background ratio. In kainic-acid-induced mouse models of drug-resistant focal epilepsy, electric-field changes in the brain associated with seizures trigger breakdown of the contrast agent, restoring the T1-weighted magnetic resonance signal, which otherwise remains quenched due to the distance-dependent magnetic resonance tuning effect between the cluster and the coating. The electric-field-responsive contrast agent may increase the probability of detecting seizure foci in patients and facilitate the study of brain diseases associated with epilepsy.
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6
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Laser-induced breakdown spectroscopy as a promising tool in the elemental bioimaging of plant tissues. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115729] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Savić T, Gambino G, Bokharaie VS, Noori HR, Logothetis NK, Angelovski G. Early detection and monitoring of cerebral ischemia using calcium-responsive MRI probes. Proc Natl Acad Sci U S A 2019; 116:20666-20671. [PMID: 31548425 PMCID: PMC6789561 DOI: 10.1073/pnas.1908503116] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cerebral ischemia is one of the leading causes of mortality and disability in infants and adults and its timely diagnosis is essential for an efficient treatment. We present a methodology for fast detection and real-time monitoring of fluctuations of calcium ions associated with focal ischemia using a molecular functional MRI approach. We used a dinuclear paramagnetic gadolinium(III) complex chelate that changes MR image contrast through its reversible interaction with extracellular calcium ions, while applying a remote transient middle cerebral artery occlusion as a model for ischemic stroke. Our method sensitively recognizes the onset and follows the dynamics of the ischemic core and penumbra with submillimeter spatial and second-scale temporal resolution, thus paving the way for noninvasive monitoring and development of targeted treatment strategies for cerebral ischemia.
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Affiliation(s)
- Tanja Savić
- MR Neuroimaging Agents Group, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Giuseppe Gambino
- MR Neuroimaging Agents Group, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Vahid S Bokharaie
- Neuronal Convergence Group, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Hamid R Noori
- Neuronal Convergence Group, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany
| | - Nikos K Logothetis
- Department of Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany;
- Department of Imaging Science and Biomedical Engineering, University of Manchester, Manchester M13 9PL, United Kingdom
| | - Goran Angelovski
- MR Neuroimaging Agents Group, Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany;
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Wei Q, Wang J, Shi W, Zhang B, Jiang H, Du M, Mei H, Hu Y. Improved in vivo detection of atherosclerotic plaques with a tissue factor-targeting magnetic nanoprobe. Acta Biomater 2019; 90:324-336. [PMID: 30954623 DOI: 10.1016/j.actbio.2019.04.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 03/22/2019] [Accepted: 04/03/2019] [Indexed: 11/19/2022]
Abstract
Rupture of atherosclerotic plaques causes acute cardiovascular and cerebrovascular pathology. Tissue factor (TF) is a key factor that affects the development of atherosclerotic plaques and the formation of thrombus and thus constitutes a potential target for the detection of atherosclerotic plaques. In this study, the conjugation of the fusion protein 'enhanced green fluorescent protein with the first epidermal growth factor domain' (EGFP-EGF1) and superparamagnetic iron oxide nanoparticles (EGFP-EGF1-SPIONs) was explored for molecular imaging of TF-positive atherosclerotic plaques. EGFP-EGF1-SPIONs showed improved accuracy, superior contrast effects, and better cytocompatibility compared with common contrast agents in the detection of atherosclerotic plaques of apolipoprotein E knockout (ApoE-/-) mice using magnetic resonance imaging. In conclusion, EGFP-EGF1-SPION is a promising TF-targeting nanoprobe to precisely and specifically detect atherosclerotic plaques, which may improve molecular imaging diagnosis of cardiovascular and cerebrovascular events for the comprehensive evaluation of atherosclerosis. STATEMENT OF SIGNIFICANCE: Traditional methods can only display the status of atherosclerosis, but not forecast the progress of lesions efficiently. It remains challenging to evaluate the plaques specifically and sensitively. In this study, we constructed a tissue factor-targeted magnetic nanoprobe to specifically detect plaques by magnetic resonance imaging in vivo, which will improve the diagnostic technology for atherosclerotic plaques and offer molecular level guidance to treat atherosclerosis. Furthermore, this strategy has critical clinical significance on prevention, diagnosis and therapeutic evaluation of cardio-cerebral vascular events.
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Affiliation(s)
- Qiuzhe Wei
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China; Targeted Biotherapy Key Laboratory of Ministry of Education, Wuhan, Hubei, PR China
| | - Jing Wang
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, PR China
| | - Wei Shi
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China; Targeted Biotherapy Key Laboratory of Ministry of Education, Wuhan, Hubei, PR China; Collaborative Innovation Center of Hematology, Huazhong University of Science and Technology, Wuhan, Hubei 430022, PR China
| | - Bo Zhang
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China; Targeted Biotherapy Key Laboratory of Ministry of Education, Wuhan, Hubei, PR China
| | - Huiwen Jiang
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China
| | - Mengyi Du
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China
| | - Heng Mei
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China; Targeted Biotherapy Key Laboratory of Ministry of Education, Wuhan, Hubei, PR China; Collaborative Innovation Center of Hematology, Huazhong University of Science and Technology, Wuhan, Hubei 430022, PR China.
| | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan 430022, PR China; Targeted Biotherapy Key Laboratory of Ministry of Education, Wuhan, Hubei, PR China; Collaborative Innovation Center of Hematology, Huazhong University of Science and Technology, Wuhan, Hubei 430022, PR China.
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9
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Barandov A, Bartelle BB, Williamson CG, Loucks ES, Lippard SJ, Jasanoff A. Sensing intracellular calcium ions using a manganese-based MRI contrast agent. Nat Commun 2019; 10:897. [PMID: 30796208 PMCID: PMC6385297 DOI: 10.1038/s41467-019-08558-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 01/15/2019] [Indexed: 12/19/2022] Open
Abstract
Calcium ions are essential to signal transduction in virtually all cells, where they coordinate processes ranging from embryogenesis to neural function. Although optical probes for intracellular calcium imaging have been available for decades, the development of probes for noninvasive detection of intracellular calcium signaling in deep tissue and intact organisms remains a challenge. To address this problem, we synthesized a manganese-based paramagnetic contrast agent, ManICS1-AM, designed to permeate cells, undergo esterase cleavage, and allow intracellular calcium levels to be monitored by magnetic resonance imaging (MRI). Cells loaded with ManICS1-AM show changes in MRI contrast when stimulated with pharmacological agents or optogenetic tools; responses directly parallel the signals obtained using fluorescent calcium indicators. Introduction of ManICS1-AM into rodent brains furthermore permits MRI-based measurement of neural activation in optically inaccessible brain regions. These results thus validate ManICS1-AM as a calcium sensor compatible with the extensive penetration depth and field of view afforded by MRI.
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Affiliation(s)
- Ali Barandov
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA
| | - Benjamin B Bartelle
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA
| | - Catherine G Williamson
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA
| | - Emily S Loucks
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA
| | - Stephen J Lippard
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA
| | - Alan Jasanoff
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA. .,Department of Brain & Cognitive Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA. .,Department of Nuclear Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave. Rm. 16-561, Cambridge, MA, 02139, USA.
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10
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Abstract
Many elegant inorganic designs have been developed to aid medical imaging. We know better now how to improve imaging due to the enormous efforts made by scientists in probe design and other fundamental sciences, including inorganic chemistry, physiochemistry, analytical chemistry, and biomedical engineering. However, despite several years being invested in the development of diagnostic probes, only a few examples have shown applicability in MRI in vivo. In this short review, we aim to show the reader the latest advances in the application of inorganic agents in preclinical MRI.
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11
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Lutz NW, Bernard M. Multiparametric quantification of the heterogeneity of free Ca 2+ concentration by 19F MR spectroscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2018; 297:96-107. [PMID: 30380459 DOI: 10.1016/j.jmr.2018.10.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 10/15/2018] [Accepted: 10/16/2018] [Indexed: 06/08/2023]
Abstract
For biological tissue that is heterogeneous with respect to free intracellular Ca2+ concentration ([Ca2+]i), the lineshape of the 19F MRS resonance of injected [Ca2+]-sensitive 4-FBAPTA or BAPTA-FF reflects the statistical distribution of [Ca2+]i values. While conventional 19F MRS of these fluorinated Ca2+ reporter molecules only provides one [Ca2+]i value per spectrum, our specially designed lineshape analysis reveals at least eight quantitative statistical parameters (descriptors) characterizing the [Ca2+]i distribution within the observed tissue volume. To this end, the [Ca2+]-sensitive 19F MRS resonance is transformed into a [Ca2+]i curve. Subsequently, the digital points of this [Ca2+]i profile are used to build a histogram using dedicated algorithms. The following statistical descriptors are computed from this histogram: weighted mean and median, standard deviation, range, mode(s), kurtosis, skewness, and entropy. Our new method is thoroughly validated through in silico and experimental models. The potential of combining statistical [Ca2+] information with spatial resolution is demonstrated by simulated statistical CSI maps. This proof of principle should form the basis of future in vivo studies in physiology and medicine, notably in heart and muscle research.
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Affiliation(s)
- Norbert W Lutz
- Aix-Marseille Univ, School of Medicine, CRMBM, 27 Bd Jean Moulin, F-13005 Marseille, France.
| | - Monique Bernard
- Aix-Marseille Univ, School of Medicine, CRMBM, 27 Bd Jean Moulin, F-13005 Marseille, France.
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12
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Gündüz S, Vibhute S, Botár R, Kálmán FK, Tóth I, Tircsó G, Regueiro-Figueroa M, Esteban-Gómez D, Platas-Iglesias C, Angelovski G. Coordination Properties of GdDO3A-Based Model Compounds of Bioresponsive MRI Contrast Agents. Inorg Chem 2018; 57:5973-5986. [PMID: 29718660 DOI: 10.1021/acs.inorgchem.8b00473] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We report a detailed characterization of the thermodynamic stability and dissociation kinetics of Gd3+ complexes with DO3A derivatives containing a (methylethylcarbamoylmethylamino)acetic acid (L1), (methylpropylcarbamoylmethylamino)acetic acid (L2), 2-dimethylamino- N-ethylacetamide (L3), or 2-dimethylamino- N-propylacetamide (L4) group attached to the fourth nitrogen atom of the macrocyclic unit. These ligands are model systems of Ca2+- and Zn2+-responsive contrast agents (CA) for application in magnetic resonance imaging (MRI). The results of the potentiometric studies ( I = 0.15 M NaCl) provide stability constants with log KGdL values in the range 13.9-14.8. The complex speciation in solution was found to be quite complicated due to the formation of protonated species at low pH, hydroxido complexes at high pH, and stable dinuclear complexes in the case of L1,2. At neutral pH significant fractions of the complexes are protonated at the amine group of the amide side chain (log KGdL×H = 7.2-8.1). These ligands form rather weak complexes with Mg2+ and Ca2+ but very stable complexes with Cu2+ (log KCuL = 20.4-22.3) and Zn2+ (log KZnL = 15.5-17.6). Structural studies using a combination of 1H NMR and luminescence spectroscopy show that the amide group of the ligand is coordinated to the metal ion at pH ∼8.5, while protonation of the amine group provokes the decoordination of the amide O atom and a concomitant increase in the hydration number and proton relaxivity. The dissociation of the complexes occurs mainly through a rather efficient proton-assisted pathway, which results in kinetic inertness comparable to that of nonmacrocyclic ligands such as DTPA rather than DOTA-like complexes.
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Affiliation(s)
- Serhat Gündüz
- MR Neuroimaging Agents , Max Planck Institute for Biological Cybernetics , D-72076 Tuebingen , Germany
| | - Sandip Vibhute
- MR Neuroimaging Agents , Max Planck Institute for Biological Cybernetics , D-72076 Tuebingen , Germany
| | - Richard Botár
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Ferenc K Kálmán
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Imre Tóth
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry, Faculty of Science and Technology , University of Debrecen , Egyetem tér 1 , H-4032 Debrecen , Hungary
| | - Martín Regueiro-Figueroa
- Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10 , 15008 A Coruña , Spain
| | - David Esteban-Gómez
- Centro de Investigaciones 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 Investigaciones Científicas Avanzadas (CICA) and Departamento de Química , Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10 , 15008 A Coruña , Spain
| | - Goran Angelovski
- MR Neuroimaging Agents , Max Planck Institute for Biological Cybernetics , D-72076 Tuebingen , Germany
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13
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Ghosh S, Harvey P, Simon JC, Jasanoff A. Probing the brain with molecular fMRI. Curr Opin Neurobiol 2018; 50:201-210. [PMID: 29649765 DOI: 10.1016/j.conb.2018.03.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 02/12/2018] [Accepted: 03/21/2018] [Indexed: 01/07/2023]
Abstract
One of the greatest challenges of modern neuroscience is to incorporate our growing knowledge of molecular and cellular-scale physiology into integrated, organismic-scale models of brain function in behavior and cognition. Molecular-level functional magnetic resonance imaging (molecular fMRI) is a new technology that can help bridge these scales by mapping defined microscopic phenomena over large, optically inaccessible regions of the living brain. In this review, we explain how MRI-detectable imaging probes can be used to sensitize noninvasive imaging to mechanistically significant components of neural processing. We discuss how a combination of innovative probe design, advanced imaging methods, and strategies for brain delivery can make molecular fMRI an increasingly successful approach for spatiotemporally resolved studies of diverse neural phenomena, perhaps eventually in people.
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Affiliation(s)
- Souparno Ghosh
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States
| | - Peter Harvey
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States
| | - Jacob C Simon
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States
| | - Alan Jasanoff
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States; Department of Brain & Cognitive Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States; Department of Nuclear Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave., Rm. 16-561, Cambridge, MA 02139, United States.
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14
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Busser B, Moncayo S, Coll JL, Sancey L, Motto-Ros V. Elemental imaging using laser-induced breakdown spectroscopy: A new and promising approach for biological and medical applications. Coord Chem Rev 2018. [DOI: 10.1016/j.ccr.2017.12.006] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Li S, Yuan Y, Yang Y, Li C, McMahon MT, Liu M, Chen S, Zhou X. Potential detection of cancer with fluorinated silicon nanoparticles in 19F MR and fluorescence imaging. J Mater Chem B 2018; 6:4293-4300. [DOI: 10.1039/c8tb00648b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Novel fluorinated silicon nanoparticles with strong fluorescence, high 19F-MRI sensitivity and excellent aqueous solubility have been successfully developed.
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Affiliation(s)
- Sha Li
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Yaping Yuan
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Yuqi Yang
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Conggang Li
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Michael T. McMahon
- Russell H. Morgan Department of Radiology and Radiological Science
- The Johns Hopkins University School of Medicine
- Baltimore
- USA
- F.M. Kirby Research Center for Functional Brain Imaging
| | - Maili Liu
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Shizhen Chen
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
| | - Xin Zhou
- Key Laboratory of Magnetic Resonance in Biological Systems
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics
- National Center for Magnetic Resonance in Wuhan
- Wuhan Institute of Physics and Mathematics
- Chinese Academy of Sciences
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Angelovski G. Heading toward Macromolecular and Nanosized Bioresponsive MRI Probes for Successful Functional Imaging. Acc Chem Res 2017; 50:2215-2224. [PMID: 28841293 DOI: 10.1021/acs.accounts.7b00203] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The quest for bioresponsive or smart contrast agents (SCAs) in molecular imaging, in particular magnetic resonance imaging (MRI), is progressively increasing since they allow for the monitoring of essential biological processes on molecular and cellular levels in a dynamic fashion. These are offshoot molecules of common contrast agents that are sensitive to biochemical changes in their environment, capable of reporting on such changes by inducing MRI signal alteration. Various mechanistic approaches and different types of SCAs have been developed in order to visualize desired processes, using diverse imaging protocols and methods. To date, the most frequently exploited probes are paramagnetic molecules that change longitudinal or transverse relaxation at proton frequency, or so-called T1- and T2-weighted probes, respectively. Moreover, SCAs operating by the chemical exchange saturation transfer mechanism, suitable for 19F MRI or possessing hyperpolarized nuclei have also appeared in the past decade, slowly finding their role in functional imaging studies. Following these mechanistic principles, a large number of SCAs suitable for diverse targets have been reported to date. This Account condenses this exciting progress, particularly focusing on probes designed for abundant targets that are suitable for practical, in vivo utilization. To date, the greatest advancements have been certainly made in the preparation of pH sensitive probes, which usually contain protonable groups that interact with paramagnetic centers, or take advantage of supramolecular (dis)assembling to induce the MRI signal change, thereupon enabling pH mapping in vivo. In a complementary approach, a combination of metal chelating ligands for Ca2+ or Zn2+ with MR reporting units results in a wide variety of SCAs that operate with different contrast mechanisms and can be used for initial functional experiments. Finally, the first examples of molecular sensing by creating host-guest complexes to track neurotransmitter flux have also been recently reported, allowing the study of brain function in an unprecedented manner. Nevertheless, wider SCA utilization in vivo has not yet been achieved. There are a few reasons for this disparity between their nominal potential and practical usage, with one of the major reasons being the low sensitivity of the MRI technique. Subsequently, the production of detectable signal change can be achieved using higher concentrations of the bioresponsive probe; however, the biocompatibility of these probes then starts to play an important role. An elegant solution to these practical challenges has been found with the integration of multiple small-sized SCAs into macromolecular and nanosized probes. In such case, the multivalent SCAs are able to circumvent the sensitivity issue, thus enhancing the MR signal and desired contrast changes. Moreover, they prolong the probe tissue retention time, while often reducing their toxicity. Finally, with altered size and properties, they allow for exploitation of mechanisms that induce the contrast change which is not possible with small-sized SCAs. To this end, this Account also discusses the current approaches that aim to develop macromolecular and nanosized SCAs suitable for practical MRI applications. With these, further progress of this exciting field is affirmed, with remarkable results expected in the near future on both the probe preparation and their utilization in functional molecular imaging.
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Affiliation(s)
- Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics, D-72076 Tuebingen, Germany
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18
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Yang P, Luo X, Wang S, Wang F, Tang C, Wang C. Biodegradable yolk-shell microspheres for ultrasound/MR dual-modality imaging and controlled drug delivery. Colloids Surf B Biointerfaces 2017; 151:333-343. [DOI: 10.1016/j.colsurfb.2016.12.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/30/2016] [Accepted: 12/23/2016] [Indexed: 12/18/2022]
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Ganesana M, Lee ST, Wang Y, Venton BJ. Analytical Techniques in Neuroscience: Recent Advances in Imaging, Separation, and Electrochemical Methods. Anal Chem 2017; 89:314-341. [PMID: 28105819 PMCID: PMC5260807 DOI: 10.1021/acs.analchem.6b04278] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
| | | | | | - B. Jill Venton
- Department of Chemistry, PO Box 400319, University of Virginia, Charlottesville, VA 22904
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Abstract
UNLABELLED Comprehensive analysis of brain function depends on understanding the dynamics of diverse neural signaling processes over large tissue volumes in intact animals and humans. Most existing approaches to measuring brain signaling suffer from limited tissue penetration, poor resolution, or lack of specificity for well-defined neural events. Here we discuss a new brain activity mapping method that overcomes some of these problems by combining MRI with contrast agents sensitive to neural signaling. The goal of this "molecular fMRI" approach is to permit noninvasive whole-brain neuroimaging with specificity and resolution approaching current optical neuroimaging methods. In this article, we describe the context and need for molecular fMRI as well as the state of the technology today. We explain how major types of MRI probes work and how they can be sensitized to neurobiological processes, such as neurotransmitter release, calcium signaling, and gene expression changes. We comment both on past work in the field and on challenges and promising avenues for future development. SIGNIFICANCE STATEMENT Brain researchers currently have a choice between measuring neural activity using cellular-level recording techniques, such as electrophysiology and optical imaging, or whole-brain imaging methods, such as fMRI. Cellular level methods are precise but only address a small portion of mammalian brains; on the other hand, whole-brain neuroimaging techniques provide very little specificity for neural pathways or signaling components of interest. The molecular fMRI techniques we discuss have particular potential to combine the specificity of cellular-level measurements with the noninvasive whole-brain coverage of fMRI. On the other hand, molecular fMRI is only just getting off the ground. This article aims to offer a snapshot of the status and future prospects for development of molecular fMRI techniques.
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3D Imaging of Nanoparticle Distribution in Biological Tissue by Laser-Induced Breakdown Spectroscopy. Sci Rep 2016; 6:29936. [PMID: 27435424 PMCID: PMC4951682 DOI: 10.1038/srep29936] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 06/27/2016] [Indexed: 02/06/2023] Open
Abstract
Nanomaterials represent a rapidly expanding area of research with huge potential for future medical applications. Nanotechnology indeed promises to revolutionize diagnostics, drug delivery, gene therapy, and many other areas of research. For any biological investigation involving nanomaterials, it is crucial to study the behavior of such nano-objects within tissues to evaluate both their efficacy and their toxicity. Here, we provide the first account of 3D label-free nanoparticle imaging at the entire-organ scale. The technology used is known as laser-induced breakdown spectroscopy (LIBS) and possesses several advantages such as speed of operation, ease of use and full compatibility with optical microscopy. We then used two different but complementary approaches to achieve 3D elemental imaging with LIBS: a volume reconstruction of a sliced organ and in-depth analysis. This proof-of-concept study demonstrates the quantitative imaging of both endogenous and exogenous elements within entire organs and paves the way for innumerable applications.
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Dentamaro M, Lux F, Vander Elst L, Dauguet N, Montante S, Moussaron A, Burtea C, Muller RN, Tillement O, Laurent S. Chemical andin vitrocharacterizations of a promising bimodal AGuIX probe able to target apoptotic cells for applications in MRI and optical imaging. CONTRAST MEDIA & MOLECULAR IMAGING 2016; 11:381-395. [DOI: 10.1002/cmmi.1702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 04/18/2016] [Accepted: 05/13/2016] [Indexed: 12/22/2022]
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Garello F, Vibhute S, Gündüz S, Logothetis NK, Terreno E, Angelovski G. Innovative Design of Ca-Sensitive Paramagnetic Liposomes Results in an Unprecedented Increase in Longitudinal Relaxivity. Biomacromolecules 2016; 17:1303-11. [PMID: 26956911 DOI: 10.1021/acs.biomac.5b01668] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Bioresponsive MRI contrast agents sensitive to Ca(II) fluctuations may play a critical role in the development of functional molecular imaging methods to study brain physiology or abnormalities in muscle contraction. A great challenge in their chemistry is the preparation of probes capable of inducing a strong signal variation that could be detected in a robust way. To this end, the incorporation of small molecular weight bioresponsive agents into nanocarriers can improve the overall properties in a few ways: (i) the agent can be delivered into the tissue of interest, increasing the local concentration; (ii) its biokinetic properties and retention time will improve; (iii) the high molecular weight and size of the nanocarrier may cause additional changes in the MRI signal and raise the chances for their detection in functional experiments. In this work, we report the preparation of the new class of liposome-based, Ca-sensitive MRI agents. We synthesized a novel amphiphilic ligand which was incorporated into the liposome bilayer. A remarkable increase of ∼420% in longitudinal relaxivity r1, from 7.3 mM(-1) s(-1) to 38.1 mM(-1) s(-1) at 25 °C and 21.5 MHz in the absence and presence of Ca(II), respectively, was achieved by the most active liposomal formulation. To the best of our knowledge, this is the highest change in r1 observed for Ca-sensitive agents at physiological pH and can be explained by simultaneous Ca-triggered increase in hydration and reduction of local motion of Gd(III) complex, which can be followed at low magnetic fields.
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Affiliation(s)
- Francesca Garello
- Molecular & Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Torino , Via Nizza 52, 10126 Torino, Italy
| | - Sandip Vibhute
- Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics , 72076 Tübingen, Germany
| | - Serhat Gündüz
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics , Spemannstrasse 41, 72076 Tübingen, Germany
| | - Nikos K Logothetis
- Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics , 72076 Tübingen, Germany.,Department of Imaging Science and Biomedical Engineering, University of Manchester , Manchester M13 9PT, United Kingdom
| | - Enzo Terreno
- Molecular & Preclinical Imaging Centers, Department of Molecular Biotechnology and Health Sciences, University of Torino , Via Nizza 52, 10126 Torino, Italy
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics , Spemannstrasse 41, 72076 Tübingen, Germany
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Regueiro-Figueroa M, Gündüz S, Patinec V, Logothetis NK, Esteban-Gómez D, Tripier R, Angelovski G, Platas-Iglesias C. Gd(3+)-Based Magnetic Resonance Imaging Contrast Agent Responsive to Zn(2+). Inorg Chem 2015; 54:10342-50. [PMID: 26468992 DOI: 10.1021/acs.inorgchem.5b01719] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We report the heteroditopic ligand H5L, which contains a DO3A unit for Gd(3+) complexation connected to an NO2A moiety through a N-propylacetamide linker. The synthesis of the ligand followed a convergent route that involved the preparation of 1,4-bis(tert-butoxycarbonylmethyl)-1,4,7-triazacyclononane following the orthoamide strategy. The luminescence lifetimes of the Tb((5)D4) excited state measured for the TbL complex point to the absence of coordinated water molecules. Density functional theory calculations and (1)H NMR studies indicate that the EuL complex presents a square antiprismatic coordination in aqueous solution, where eight coordination is provided by the seven donor atoms of the DO3A unit and the amide oxygen atom of the N-propylacetamide linker. Addition of Zn(2+) to aqueous solutions of the TbL complex provokes a decrease of the emission intensity as the emission lifetime becomes shorter, which is a consequence of the coordination of a water molecule to the Tb(3+) ion upon Zn(2+) binding to the NO2A moiety. The relaxivity of the GdL complex recorded at 7 T (25 °C) increases by almost 150% in the presence of 1 equiv of Zn(2+), while Ca(2+) and Mg(2+) induced very small relaxivity changes. In vitro magnetic resonance imaging experiments confirmed the ability of GdL to provide response to the presence of Zn(2+).
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Affiliation(s)
- Martín Regueiro-Figueroa
- Grupo QUICOOR, Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Serhat Gündüz
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics , Spemannstr. 41, 72076 Tübingen, Germany
| | - Véronique Patinec
- UFR des Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521 , 6 avenue Victor le Gorgeu, C.S. 93837, 29238 BREST Cedex 3, France
| | - Nikos K Logothetis
- Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics , Tübingen, Germany.,Department of Imaging Science and Biomedical Engineering, University of Manchester , Manchester, U.K
| | - David Esteban-Gómez
- Grupo QUICOOR, Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
| | - Raphaël Tripier
- UFR des Sciences et Techniques, Université de Bretagne Occidentale, UMR-CNRS 6521 , 6 avenue Victor le Gorgeu, C.S. 93837, 29238 BREST Cedex 3, France
| | - Goran Angelovski
- MR Neuroimaging Agents, Max Planck Institute for Biological Cybernetics , Spemannstr. 41, 72076 Tübingen, Germany
| | - Carlos Platas-Iglesias
- Grupo QUICOOR, Centro de Investigaciones Científicas Avanzadas (CICA) and Departamento de Química Fundamental, Universidade da Coruña , Campus da Zapateira, Rúa da Fraga 10, 15008 A Coruña, Spain
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