201
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Vanasschen C, Molnár E, Tircsó G, Kálmán FK, Tóth É, Brandt M, Coenen HH, Neumaier B. Novel CDTA-based, Bifunctional Chelators for Stable and Inert MnII Complexation: Synthesis and Physicochemical Characterization. Inorg Chem 2017. [DOI: 10.1021/acs.inorgchem.7b00460] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christian Vanasschen
- Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Enikő Molnár
- Department of Inorganic and Analytical Chemistry, Faculty
of Science and Technology, University of Debrecen, Debrecen, Egyetem tér 1, H-4010, Hungary
| | - Gyula Tircsó
- Department of Inorganic and Analytical Chemistry, Faculty
of Science and Technology, University of Debrecen, Debrecen, Egyetem tér 1, H-4010, Hungary
| | - Ferenc K. Kálmán
- Department of Inorganic and Analytical Chemistry, Faculty
of Science and Technology, University of Debrecen, Debrecen, Egyetem tér 1, H-4010, Hungary
- Centre de Biophysique Moléculaire,
CNRS, Université d’Orléans, rue Charles Sadron, 45071 Orléans, Cedex 2, France
- Le Studium, Loire Valley Institute for Advanced Studies, 1 Rue
Dupanloup, 45000 Orléans, France
| | - Éva Tóth
- Centre de Biophysique Moléculaire,
CNRS, Université d’Orléans, rue Charles Sadron, 45071 Orléans, Cedex 2, France
| | - Marie Brandt
- Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Heinz H. Coenen
- Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Bernd Neumaier
- Institut für Neurowissenschaften und Medizin, INM-5: Nuklearchemie, Forschungszentrum Jülich GmbH, Jülich, Germany
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202
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Giovenzana GB, Lattuada L, Negri R. Recent Advances in Bifunctional Paramagnetic Chelates for MRI. Isr J Chem 2017. [DOI: 10.1002/ijch.201700028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Giovanni B. Giovenzana
- Dipartimento di Scienze del Farmaco; Università del Piemonte Orientale “A. Avogadro”; L.go Donegani 2/3 I-28100 Novara Italy
| | - Luciano Lattuada
- Bracco Imaging SpA, Bracco Research Centre; Via Ribes 5 I-10010 Colleretto Giacosa TO, Italy
| | - Roberto Negri
- Dipartimento di Scienze del Farmaco; Università del Piemonte Orientale “A. Avogadro”; L.go Donegani 2/3 I-28100 Novara Italy
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203
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Xie D, Kim S, Kohli V, Banerjee A, Yu M, Enriquez JS, Luci JJ, Que EL. Hypoxia-Responsive 19F MRI Probes with Improved Redox Properties and Biocompatibility. Inorg Chem 2017; 56:6429-6437. [PMID: 28537705 DOI: 10.1021/acs.inorgchem.7b00500] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
19F magnetic resonance imaging (MRI), an emerging modality in biomedical imaging, has shown promise for in vitro and in vivo preclinical studies. Here we present a series of fluorinated Cu(II)ATSM derivatives for potential use as 19F magnetic resonance agents for sensing cellular hypoxia. The synthesized complexes feature a hypoxia-targeting Cu2+ coordination core, nine equivalent fluorine atoms connected via a variable-length poly(ethylene glycol) linker. Introduction of the fluorine moiety maintains the planar coordination geometry of the Cu2+ center, while the linker length modulates the Cu2+/+ reduction potential, 19F NMR relaxation properties, and lipophilicity. In particular, the 19F NMR relaxation properties were quantitatively evaluated by the Solomon-Bloembergen model, revealing a regular pattern of relaxation enhancement tuned by the distance between Cu2+ and F atoms. Finally, the potential utility of these complexes for sensing reductive environments was demonstrated using both 19F MR phantom imaging and 19F NMR, including experiments in intact live cells.
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Affiliation(s)
- Da Xie
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Seyong Kim
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Vikraant Kohli
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Arnab Banerjee
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Meng Yu
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - José S Enriquez
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
| | - Jeffrey J Luci
- Department of Neuroscience, The University of Texas at Austin , Austin, Texas 78712, United States.,Imaging Research Center, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Emily L Que
- Department of Chemistry, The University of Texas at Austin , 105 E. 24th Street Stop A5300, Austin, Texas 78712, United States
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204
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Nelson BB, Goodrich LR, Barrett MF, Grinstaff MW, Kawcak CE. Use of contrast media in computed tomography and magnetic resonance imaging in horses: Techniques, adverse events and opportunities. Equine Vet J 2017; 49:410-424. [DOI: 10.1111/evj.12689] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Accepted: 04/04/2017] [Indexed: 12/20/2022]
Affiliation(s)
- B. B. Nelson
- Gail Holmes Equine Orthopaedic Research Center, Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences, Colorado State University; Fort Collins Colorado USA
| | - L. R. Goodrich
- Gail Holmes Equine Orthopaedic Research Center, Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences, Colorado State University; Fort Collins Colorado USA
| | - M. F. Barrett
- Gail Holmes Equine Orthopaedic Research Center, Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences, Colorado State University; Fort Collins Colorado USA
- Department of Environmental and Radiological Health Sciences; Colorado State University; Fort Collins Colorado USA
| | - M. W. Grinstaff
- Departments of Biomedical Engineering, Chemistry, Materials Science & Engineering and Medicine; Boston University; Boston Massachusetts USA
| | - C. E. Kawcak
- Gail Holmes Equine Orthopaedic Research Center, Department of Clinical Sciences; College of Veterinary Medicine and Biomedical Sciences, Colorado State University; Fort Collins Colorado USA
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205
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Gale EM, Caravan P, Rao AG, McDonald RJ, Winfeld M, Fleck RJ, Gee MS. Gadolinium-based contrast agents in pediatric magnetic resonance imaging. Pediatr Radiol 2017; 47:507-521. [PMID: 28409250 DOI: 10.1007/s00247-017-3806-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 11/16/2016] [Accepted: 02/10/2017] [Indexed: 12/17/2022]
Abstract
Gadolinium-based contrast agents can increase the accuracy and expediency of an MRI examination. However the benefits of a contrast-enhanced scan must be carefully weighed against the well-documented risks associated with administration of exogenous contrast media. The purpose of this review is to discuss commercially available gadolinium-based contrast agents (GBCAs) in the context of pediatric radiology. We discuss the chemistry, regulatory status, safety and clinical applications, with particular emphasis on imaging of the blood vessels, heart, hepatobiliary tree and central nervous system. We also discuss non-GBCA MRI contrast agents that are less frequently used or not commercially available.
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Affiliation(s)
- Eric M Gale
- Department of Radiology, The Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Peter Caravan
- Department of Radiology, The Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Anil G Rao
- Department of Radiology and Radiological Science, Medical University of South Carolina, Charleston, SC, USA
| | - Robert J McDonald
- Department of Radiology, College of Medicine, Mayo Clinic, Rochester, MN, USA
| | - Matthew Winfeld
- University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Robert J Fleck
- Department of Pediatric Radiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Michael S Gee
- Division of Pediatric Imaging, Department of Radiology, MassGeneral Hospital for Children, Harvard Medical School, 55 Fruit St., Ellison 237, Boston, MA, 02114, USA.
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206
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Mohamadi A, Miller LW. Efficient route to pre-organized and linear polyaminopolycarboxylates: Cy-TTHA, Cy-DTPA and mono/di- reactive, tert-butyl protected TTHA/Cy-TTHA. Tetrahedron Lett 2017; 58:1441-1444. [PMID: 29176914 PMCID: PMC5699510 DOI: 10.1016/j.tetlet.2017.02.056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pre-organized polyaminopolycarboxylate chelators Cy-TTHA and Cy-DTPA were synthesized via modular five-step syntheses from commercially available starting materials in ~ 62% and 47% overall yields, respectively. Furthermore, strategies are reported for the efficient preparation of mono- and di-reactive, tert-butyl-protected TTHA/Cy-TTHA to selectively functionalize central chelators' carboxylic acids.
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Affiliation(s)
- Ali Mohamadi
- University of Illinois at Chicago, Department of Chemistry, 845 W. Taylor Street, MC 111, Chicago, IL 60607
| | - Lawrence W Miller
- University of Illinois at Chicago, Department of Chemistry, 845 W. Taylor Street, MC 111, Chicago, IL 60607
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207
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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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208
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Islam MK, Kim S, Kim HK, Park S, Lee GH, Kang HJ, Jung JC, Park JS, Kim TJ, Chang Y. Manganese Complex of Ethylenediaminetetraacetic Acid (EDTA)-Benzothiazole Aniline (BTA) Conjugate as a Potential Liver-Targeting MRI Contrast Agent. J Med Chem 2017; 60:2993-3001. [PMID: 28301142 DOI: 10.1021/acs.jmedchem.6b01799] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A novel manganese(II) complex based on an ethylenediaminetetraacetic acid (EDTA) coordination cage bearing a benzothiazole aniline (BTA) moiety (Mn-EDTA-BTA) was designed and synthesized for use as a liver-specific MRI contrast agent with high chelation stability. In addition to forming a hydrophilic, stable complex with Mn2+, this new Mn chelate was rapidly taken up by liver hepatocytes and excreted by the kidneys and biliary system. The kinetic inertness and R1 relaxivity of the complex were much higher than those of mangafodipir trisodium (MnDPDP), a clinically approved liver-specific MRI contrast agent. The diagnostic utility of this new Mn complex in MRI was demonstrated by high-sensitivity tumor detection in an animal model of liver cancer.
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Affiliation(s)
| | | | | | | | | | | | | | - Joon-Suk Park
- Laboratory Animal Center, Daegu-Gyeongbuk Medical Innovation Foundation , Chumbok-ro 80, Dong-gu, Daegu 41061, Korea
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209
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Sørensen TJ, Tropiano M, Kenwright AM, Faulkner S. Triheterometallic Lanthanide Complexes Prepared from Kinetically Inert Lanthanide Building Blocks. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700027] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Thomas Just Sørensen
- Nano-Science Center & Department of Chemistry; University of Copenhagen; Universitetsparken 5 2100 København Ø Denmark
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
| | - Manuel Tropiano
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
| | - Alan M. Kenwright
- Chemistry Department; Durham University; South Road DH1 3LE Durham UK
| | - Stephen Faulkner
- Chemistry Research Laboratory; Oxford University; 12 Mansfield Road OX1 3TA Oxford UK
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210
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Yu M, Ward MB, Franke A, Ambrose SL, Whaley ZL, Bradford TM, Gorden JD, Beyers RJ, Cattley RC, Ivanović-Burmazović I, Schwartz DD, Goldsmith CR. Adding a Second Quinol to a Redox-Responsive MRI Contrast Agent Improves Its Relaxivity Response to H2O2. Inorg Chem 2017; 56:2812-2826. [DOI: 10.1021/acs.inorgchem.6b02964] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Meng Yu
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Meghan B. Ward
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Alicja Franke
- Department of Chemistry and Pharmacy, University Erlangen-Nuremberg, 91058 Erlangen, Germany
| | - Stephen L. Ambrose
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Zachary L. Whaley
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Thomas Miller Bradford
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - John D. Gorden
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
| | - Ronald J. Beyers
- Auburn University Magnetic Resonance Imaging Research Center, Auburn, Alabama 36849, United States
| | - Russell C. Cattley
- Department
of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, Alabama 36849, United States
| | | | - Dean D. Schwartz
- Department of Anatomy, Physiology, and
Pharmacology, College of Veterinary Medicine, Auburn University, Auburn, Alabama 36849, United States
| | - Christian R. Goldsmith
- Department of Chemistry
and Biochemistry, Auburn University, Auburn, Alabama 36849, United States
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211
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Meloni MM, Barton S, Xu L, Kaski JC, Song W, He T. Contrast agents for cardiovascular magnetic resonance imaging: an overview. J Mater Chem B 2017; 5:5714-5725. [DOI: 10.1039/c7tb01241a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Contrast agents for Cardiovascular Magnetic Resonance (CMR) play a major role in research and clinical cardiology.
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Affiliation(s)
- Marco M. Meloni
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
- School of Pharmacy and Chemistry
| | - Stephen Barton
- School of Pharmacy and Chemistry
- Kingston University
- London
- UK
| | - Lei Xu
- Department of Radiology
- Beijing Anzhen Hospital
- Beijing
- China
| | - Juan C. Kaski
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
| | - Wenhui Song
- UCL Centre for Biomaterials
- Division of surgery & Interventional Science
- University College of London
- London
- UK
| | - Taigang He
- Molecular and Clinical Sciences Research Institute
- St George's, University of London
- London
- UK
- Royal Brompton Hospital
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212
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Zhu T, Ma X, Chen R, Ge Z, Xu J, Shen X, Jia L, Zhou T, Luo Y, Ma T. Using fluorescently-labeled magnetic nanocomposites as a dual contrast agent for optical and magnetic resonance imaging. Biomater Sci 2017; 5:1090-1100. [PMID: 28425537 DOI: 10.1039/c7bm00031f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intravenous administration of atta@Fe3O4@Ru nanocomposites to a rabbit model resulted in a marked and negatively enhanced T2-weighted MRI.
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Affiliation(s)
- Taofeng Zhu
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
| | - Xiuqin Ma
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
| | - Ruhua Chen
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
| | - Zhijun Ge
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
| | - Jun Xu
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Xiaoke Shen
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Lei Jia
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Tao Zhou
- College of Chemistry and Chemical Engineering
- Henan Polytechnic University
- Jiaozuo
- China
| | - Yifeng Luo
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
| | - Tieliang Ma
- The Affiliated Yixing Hospital of Jiangsu University
- Yixing
- China
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213
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Gale EM, Jones CM, Ramsay I, Farrar CT, Caravan P. A Janus Chelator Enables Biochemically Responsive MRI Contrast with Exceptional Dynamic Range. J Am Chem Soc 2016; 138:15861-15864. [PMID: 27960350 PMCID: PMC5328420 DOI: 10.1021/jacs.6b10898] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We introduce a new biochemically responsive Mn-based MRI contrast agent that provides a 9-fold change in relaxivity via switching between the Mn3+ and Mn2+ oxidation states. Interchange between oxidation states is promoted by a "Janus" ligand that isomerizes between binding modes that favor Mn3+ or Mn2+. It is the only ligand that supports stable complexes of Mn3+ and Mn2+ in biological milieu. Rapid interconversion between oxidation states is mediated by peroxidase activity (oxidation) and l-cysteine (reduction). This Janus system provides a new paradigm for the design of biochemically responsive MRI contrast agents.
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Affiliation(s)
- Eric M. Gale
- The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129
| | - Chloe M. Jones
- The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129
| | - Ian Ramsay
- The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129
| | - Christian T. Farrar
- The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129
| | - Peter Caravan
- The Athinoula A. Martinos Center for Biomedical Imaging, The Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 149 Thirteenth Street, Suite 2301, Charlestown, Massachusetts 02129
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214
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Kim J, Park JE, Nahrendorf M, Kim DE. Direct Thrombus Imaging in Stroke. J Stroke 2016; 18:286-296. [PMID: 27733029 PMCID: PMC5066439 DOI: 10.5853/jos.2016.00906] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 09/01/2016] [Accepted: 09/17/2016] [Indexed: 01/02/2023] Open
Abstract
There is an emergent need for imaging methods to better triage patients with acute stroke for tissue-plasminogen activator (tPA)-mediated thrombolysis or endovascular clot retrieval by directly visualizing the size and distribution of cerebral thromboemboli. Currently, magnetic resonance (MR) or computed tomography (CT) angiography visualizes the obstruction of blood flow within the vessel lumen rather than the thrombus itself. The present visualization method, which relies on observation of the dense artery sign (the appearance of cerebral thrombi on a non-enhanced CT), suffers from low sensitivity. When translated into the clinical setting, direct thrombus imaging is likely to enable individualized acute stroke therapy by allowing clinicians to detect the thrombus with high sensitivity, assess the size and nature of the thrombus more precisely, serially monitor the therapeutic effects of thrombolysis, and detect post-treatment recurrence. This review is intended to provide recent updates on stroke-related direct thrombus imaging using MR imaging, positron emission tomography, or CT.
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Affiliation(s)
- Jongseong Kim
- Molecular Imaging and Neurovascular Research (MINER) Laboratory, Dongguk University Ilsan Hospital, Goyang, Korea.,Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA )
| | - Jung E Park
- Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Matthias Nahrendorf
- Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA ).,Center for Systems Biology, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Dong-Eog Kim
- Molecular Imaging and Neurovascular Research (MINER) Laboratory, Dongguk University Ilsan Hospital, Goyang, Korea.,Global Research Laboratory for Thrombus-targeted Theranostics at Dongguk University Ilsan Hospital (Korea) and Massachusetts General Hospital ( USA ).,Department of Neurology, Dongguk University Ilsan Hospital, Goyang, Korea
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215
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Morishita K, Murayama S, Araki T, Aoki I, Karasawa S. Thermal- and pH-Dependent Size Variable Radical Nanoparticles and Its Water Proton Relaxivity for Metal-Free MRI Functional Contrast Agents. J Org Chem 2016; 81:8351-62. [PMID: 27541011 DOI: 10.1021/acs.joc.6b01509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
For development of the metal-free MRI contrast agents, we prepared the supra-molecular organic radical, TEMPO-UBD, carrying TEMPO radical, as well as the urea, alkyl group, and phenyl ring, which demonstrate self-assembly behaviors using noncovalent bonds in an aqueous solution. In addition, TEMPO-UBD has the tertiary amine and the oligoethylene glycol chains (OEGs) for the function of pH and thermal responsiveness. By dynamic light scattering and transmission electron microscopy imaging, the resulting self-assembly was seen to form the spherical nanoparticles 10-150 nm in size. On heating, interestingly, the nanoparticles showed a lower critical solution temperature (LCST) behavior having two-step variation. This double-LCST behavior is the first such example among the supra-molecules. To evaluate of the ability as MRI contrast agents, the values of proton ((1)H) longitudinal relaxivity (r1) were determined using MRI apparatus. In conditions below and above CAC at pH 7.0, the distinguishable r1 values were estimated to be 0.17 and 0.21 mM(-1) s(1), indicating the suppression of fast tumbling motion of TEMPO moiety in a nanoparticle. Furthermore, r1 values became larger in the order of pH 7.0 > 9.0 > 5.0. Those thermal and pH dependencies indicated the possibility of metal-fee MRI functional contrast agents in the future.
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Affiliation(s)
- Kosuke Morishita
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Shuhei Murayama
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Takeru Araki
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Ichio Aoki
- Department of Molecular Imaging and Theranostics, National Institute of Radiological Sciences (NIRS), QST , Anagawa 4-9-1, Inage, Chiba-city 263-8555, Japan
| | - Satoru Karasawa
- Graduate School of Pharmaceutical Sciences, Kyushu University , 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.,PRESTO, Japan Science and Technology Agency , Kawaguchi 332-0012, Japan
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216
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Platas-Iglesias C, Esteban-Gómez D, Helm L, Regueiro-Figueroa M. Transient versus Static Electron Spin Relaxation in Mn(2+) Complexes Relevant as MRI Contrast Agents. J Phys Chem A 2016; 120:6467-76. [PMID: 27459626 DOI: 10.1021/acs.jpca.6b05423] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The zero-field splitting (ZFS) parameters of the [Mn(EDTA)(H2O)](2-)·2H2O and [Mn(MeNO2A)(H2O)]·2H2O systems were estimated by using DFT and ab initio CASSCF/NEVPT2 calculations (EDTA = 2,2',2″,2‴-(ethane-1,2-diylbis(azanetriyl))tetraacetate; MeNO2A = 2,2'-(7-methyl-1,4,7-triazonane-1,4-diyl)diacetate). Subsequent molecular dynamics calculations performed within the atom-centered density matrix propagation (ADMP) approach provided access to the transient and static ZFS parameters, as well as to the correlation time of the transient ZFS. The calculated ZFS parameters present a reasonable agreement with the experimental values obtained from the analysis of (1)H relaxation data. The correlation times calculated for the two systems investigated turned out to be very short (τc ∼ 0.02-0.05 ps), which shows that the transient ZFS is modulated by molecular vibrations. On the contrary, the static ZFS is modulated by the rotation of the complexes in solution, which for the small complexes investigated here is characterized by rotational correlation times of τR ∼ 35-60 ps. As a result, electron spin relaxation in small Mn(2+) complexes is dominated by the static ZFS.
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Affiliation(s)
- Carlos Platas-Iglesias
- 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
| | - David Esteban-Gómez
- 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
| | - Lothar Helm
- Laboratoire de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne, EPFL-BCH , CH-1015 Lausanne, Switzerland
| | - Martín Regueiro-Figueroa
- 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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217
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Physico-chemical properties of Mn II complexes formed with cis- and trans-DO2A: thermodynamic, electrochemical and kinetic studies. J Inorg Biochem 2016; 163:206-213. [PMID: 27567150 DOI: 10.1016/j.jinorgbio.2016.07.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/26/2016] [Accepted: 07/26/2016] [Indexed: 02/05/2023]
Abstract
SYNOPSIS MnII complexes formed with cis- and trans-DO2A (DO2A=1,4,7,10-tetraazacyclododecane-1,4 (or 1,7) -diacetic acid) chelators were investigated by pH-potentiometry, 1H relaxometry, UV-vis spectrophotometry and cyclic voltammetry. The physico-chemical characteristics of MnII complexes of these structure isomers do not differ dramatically, however the cis-DO2A platform has better potential for further development. Manganese (MnII) is a promising alternative to gadolinium (GdIII) as a magnetic resonance imaging (MRI) agent. Unlike gadolinium, this biogenic metal might be better tolerated by the body, reducing the risk of toxicity associated with dissociation of the complex. Herein we report detailed equilibrium and kinetic studies performed with MnII complexes of 1,4,7,10-tetraazacyclododecane-1,4-diacetic acid (1,4-DO2A or cis-DO2A) and 1,4,7,10-tetraazacyclododecane-1,7-diacetic acid (1,7-DO2A or trans-DO2A). The protonation constants of the ligands as well as stability constants of their MnII complexes have been determined by pH-potentiometry. The stability constants of [Mn(cis-DO2A)] are slightly higher than those of [Mn(trans-DO2A)] (log KMnL=15.68 and 15.22, respectively). Cyclic voltammetric (CV) experiments performed on [Mn(cis-DO2A)] and [Mn(trans-DO2A)] revealed quasireversible systems with a half-wave potential of +636 and +705mV versus Ag/AgCl, respectively. These values indicate that the MnII ion in these complexes is more stabilized against the oxidation than in [Mn(EDTA)]2-. The kinetic inertness of the complexes has been studied in transmetallation reactions with CuII or ZnII ions. Kinetic measurements indicate that both MnII complexes primarily undergo acid catalyzed dissociation and positions of the acetate pendant arms do not influence kinetic inertness. The inertness of these complexes is comparable to that of [Mn(NOTA)]- (NOTA=1,4,7-triazacyclononane-1,4,7-triacetic acid) and about twenty times lower than that of [Mn(DOTA)]2- (DOTA=1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid). In conclusion, [Mn(cis-DO2A)] displays some very interesting features (thermodynamic and redox stability as well as kinetic inertness) which makes this complex a promising platform for the development of more efficient MnII complexes as alternatives to Gd-based MRI agents.
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218
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Baroni S, Colombo Serra S, Fringuello Mingo A, Lux G, Giovenzana GB, Lattuada L. Synthesis and Relaxometric Characterization of a New Mn(II)-EDTA-Deoxycholic Acid Conjugate Complex as a Potential MRI Blood Pool Agent. ChemistrySelect 2016. [DOI: 10.1002/slct.201600349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- S. Baroni
- Molecular Imaging Center; Department of Molecular Biotechnologies & Health Sciences; Università di Torino; Via Nizza 52 10100 Torino (TO) Italy
| | - Sonia Colombo Serra
- Bracco Imaging SpA; Bracco Research Center; Via Ribes 5 10010 Colleretto Giacosa (TO) Italy
| | - Alberto Fringuello Mingo
- Bracco Imaging SpA; Bracco Research Center; Via Ribes 5 10010 Colleretto Giacosa (TO) Italy
- Dipartimento di Fisica; Università di Torino; Via Pietro Giuria 1 10100 Torino (TO) Italy
| | - G. Lux
- Bracco Imaging SpA; Bracco Research Center; Via Ribes 5 10010 Colleretto Giacosa (TO) Italy
| | - G. B. Giovenzana
- Dipartimento di Scienze del Farmaco; Università degli Studi del Piemonte Orientale “A. Avogadro”; Largo Donegani 2/3 28100 Novara (NO) Italy
| | - L. Lattuada
- Bracco Imaging SpA; Bracco Research Center; Via Ribes 5 10010 Colleretto Giacosa (TO) Italy
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219
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Barandov A, Bartelle BB, Gonzalez BA, White WL, Lippard SJ, Jasanoff A. Membrane-Permeable Mn(III) Complexes for Molecular Magnetic Resonance Imaging of Intracellular Targets. J Am Chem Soc 2016; 138:5483-6. [PMID: 27088782 DOI: 10.1021/jacs.5b13337] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Intracellular compartments make up roughly two-thirds of the body, but delivery of molecular imaging probes to these spaces can be challenging. This situation is particularly true for probes designed for detection by magnetic resonance imaging (MRI), a high-resolution but relatively insensitive modality. Most MRI contrast agents are polar and membrane impermeant, making it difficult to deliver them in sufficient quantities for measurement of intracellular analytes. Here we address this problem by introducing a new class of planar tetradentate Mn(III) chelates assembled from a 1,2-phenylenediamido (PDA) backbone. Mn(III)-PDA complexes display T1 relaxivity comparable to that of Gd(III)-based contrast agents and undergo spontaneous cytosolic localization via defined mechanisms. Probe variants incorporating enzyme-cleavable acetomethoxy ester groups are processed by intracellular esterases and accumulate in cells. Probes modified with ethyl esters preferentially label genetically modified cells that express a substrate-selective esterase. In each case, the contrast agents gives rise to robust T1-weighted MRI enhancements, providing precedents for the detection of intracellular targets by Mn(III)-PDA complexes. These compounds therefore constitute a platform from which to develop reagents for molecular MRI of diverse processes inside cells.
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Affiliation(s)
- Ali Barandov
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Benjamin B Bartelle
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Beatriz A Gonzalez
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - William L White
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Stephen J Lippard
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Alan Jasanoff
- Departments of †Biological Engineering, ‡Chemistry, §Brain and Cognitive Sciences, and ⊥Nuclear Science and Engineering, Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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220
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Gallo J, Vasimalai N, Fernandez-Arguelles MT, Bañobre-López M. Green synthesis of multimodal ‘OFF–ON’ activatable MRI/optical probes. Dalton Trans 2016; 45:17672-17680. [DOI: 10.1039/c6dt02840c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We report a simple and green protocol for the preparation of redox responsive multimodal MRI/optical contrast agents based on Mn nanosheets and carbon dots.
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Affiliation(s)
- J. Gallo
- Advanced (Magnetic) Theranostic Nanostructures Group
- INL – International Iberian Nanotechnology Laboratory
- 4715-330 Braga
- Portugal
| | - N. Vasimalai
- Life Sciences Department
- INL – International Iberian Nanotechnology Laboratory
- 4715-330 Braga
- Portugal
| | | | - M. Bañobre-López
- Advanced (Magnetic) Theranostic Nanostructures Group
- INL – International Iberian Nanotechnology Laboratory
- 4715-330 Braga
- Portugal
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221
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Turyanska L, Moro F, Patanè A, Barr J, Köckenberger W, Taylor A, Faas HM, Fowler M, Wigmore P, Trueman RC, Williams HEL, Thomas NR. Developing Mn-doped lead sulfide quantum dots for MRI labels. J Mater Chem B 2016; 4:6797-6802. [DOI: 10.1039/c6tb02574a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Magnetic interactions of Mn2+ ions in lead sulfide (PbS) nanocrystals with protons in water are probed by NMR and MRI.
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Affiliation(s)
- Lyudmila Turyanska
- School of Physics and Astronomy
- The University of Nottingham
- UK
- School of Chemistry
- University of Lincoln
| | - Fabrizio Moro
- School of Physics and Astronomy
- The University of Nottingham
- UK
| | - Amalia Patanè
- School of Physics and Astronomy
- The University of Nottingham
- UK
| | - James Barr
- School of Physics and Astronomy
- The University of Nottingham
- UK
| | | | - Alexander Taylor
- Faculty of Medicine and Health Sciences
- The University of Nottingham
- UK
| | - Henryk M. Faas
- Faculty of Medicine and Health Sciences
- The University of Nottingham
- UK
| | - Maxine Fowler
- Faculty of Medicine and Health Sciences
- The University of Nottingham
- UK
| | - Peter Wigmore
- Faculty of Medicine and Health Sciences
- The University of Nottingham
- UK
| | | | - Huw E. L. Williams
- Centre for Biomolecular Sciences
- School of Chemistry
- The University of Nottingham
- UK
| | - Neil R. Thomas
- Centre for Biomolecular Sciences
- School of Chemistry
- The University of Nottingham
- UK
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