1
|
Chen Y, Chen M, Zhai T, Zhou H, Zhou Z, Liu X, Yang S, Yang H. Glutathione-Responsive Chemodynamic Therapy of Manganese(III/IV) Cluster Nanoparticles Enhanced by Electrochemical Stimulation via Oxidative Stress Pathway. Bioconjug Chem 2022; 33:152-163. [PMID: 34905922 DOI: 10.1021/acs.bioconjchem.1c00512] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Escalating the level of reactive oxygen species (ROS) in a tumor microenvironment is one of the effective strategies to improve the efficacy of anticancer therapy. In this work, manganese cluster nanoparticles (Mn12) encapsulated with heparin (Mn12-heparin) were developed as a chemodynamic therapeutic agent for cancer treatment by raising ROS levels in tumor cells via cascade reactions. The manganese cluster is a cluster of mixed valence (III/IV) with acetate as the ligand. The cluster is readily subject to reduction by glutathione (GSH) to release Mn(II), which reacts with H2O2 to generate hydroxyl radicals via a Fenton-like pathway. The generation of hydroxyl radicals could be enhanced by the stimulation of an external alternative electric field during which GSH acts as an electron mediator to enhance the release of Mn(II) from the cluster. The relatively high levels of both H2O2 and GSH and the acidic environment in tumor cells strengthen its specificity when the manganese cluster system is employed to suppress or eliminate tumors. Both in vitro and in vivo results suggest that, in addition to the cytotoxicity imposed by the raised ROS level due to the presence of Mn(II) species, the depletion of endogenous GSH leads indirectly to the inhibition of glutathione peroxidase 4 (GPX4), consequently raising the lipid peroxidation (LPO) level to cause ferroptosis. The apoptosis and ferroptosis jointly render the manganese-based agent potent efficacy with tumor-targeting specificity in antitumor treatment under electric stimulation.
Collapse
Affiliation(s)
- Yang Chen
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Ming Chen
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Tianli Zhai
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Han Zhou
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Zhiguo Zhou
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Xiaoming Liu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001, P. R. China
| | - Shiping Yang
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| | - Hong Yang
- College of Chemistry and Materials Science, International Joint Laboratory on Resource, Chemistry of Ministry Education, Shanghai Normal University, Shanghai 200234, P. R. China
| |
Collapse
|
2
|
Kong X, Wan G, Li B, Wu L. Recent advances of polyoxometalates in multi-functional imaging and photothermal therapy. J Mater Chem B 2020; 8:8189-8206. [DOI: 10.1039/d0tb01375g] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The recent advances of polyoxometalate clusters in terms of near infrared photothermal properties for targeted tumor therapy have been summarized while the combined applications with various bio-imaging techniques and chemotherapies are reviewed.
Collapse
Affiliation(s)
- Xueping Kong
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Guofeng Wan
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Bao Li
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- China
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials
- College of Chemistry
- Jilin University
- Changchun
- China
| |
Collapse
|
3
|
Magnetic resonance imaging contrast enhancement in vitro and in vivo by octanuclear iron-oxo cluster-based agents. J Inorg Biochem 2018; 186:176-186. [PMID: 29957454 PMCID: PMC6943819 DOI: 10.1016/j.jinorgbio.2018.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/24/2018] [Accepted: 06/09/2018] [Indexed: 02/03/2023]
Abstract
A water-soluble octanuclear cluster, [Fe8], was studied with regard to its properties as a potential contrast enhancing agent in magnetic resonance imaging (MRI) in magnetic fields of 1.3, 7.2 and 11.9 T and was shown to have transverse relaxivities r2 = 4.01, 10.09 and 15.83 mM s-1, respectively. A related hydrophobic [Fe8] cluster conjugated with 5 kDa hyaluronic acid (HA) was characterized by 57Fe-Mössbauer and MALDI-TOF mass spectroscopy, and was evaluated in aqueous solutions in vitro with regard to its contrast enhancing properties [r2 = 3.65 mM s-1 (1.3 T), 26.20 mM s-1 (7.2 T) and 52.18 mM s-1 (11.9 T)], its in vitro cellular cytotoxicity towards A-549 cells and COS-7 cells and its in vivo enhancement of T2-weighted images (4.7 T) of a human breast cancer xenografted on a nude mouse. The physiologically compatible [Fe8]-HA conjugate was i.v. injected to the tumor-bearing mouse, resulting in observable, heterogeneous signal change within the tumor, evident 15 min after injection and persisting for approximately 30 min. Both molecular [Fe8] and its HA-conjugate show a strong magnetic field dependence on r2, rendering them promising platforms for the further development of T2 MRI contrast agents in high and ultrahigh magnetic fields.
Collapse
|
4
|
Chen WP, Singleton J, Qin L, Camón A, Engelhardt L, Luis F, Winpenny REP, Zheng YZ. Quantum Monte Carlo simulations of a giant {Ni 21Gd 20} cage with a S = 91 spin ground state. Nat Commun 2018; 9:2107. [PMID: 29844417 PMCID: PMC5974011 DOI: 10.1038/s41467-018-04547-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 05/04/2018] [Indexed: 11/09/2022] Open
Abstract
The detailed analysis of magnetic interactions in a giant molecule is difficult both because the synthesis of such compounds is challenging and the number of energy levels increases exponentially with the magnitude and number of spins. Here, we isolated a {Ni21Gd20} nanocage with a large number of energy levels (≈5 × 1030) and used quantum Monte Carlo (QMC) simulations to perform a detailed analysis of magnetic interactions. Based on magnetization measurements above 2 K, the QMC simulations predicted very weak ferromagnetic interactions that would give a record S = 91 spin ground state. Low-temperature measurements confirm the spin ground state but suggest a more complex picture due to the single ion anisotropy; this has also been modeled using the QMC approach. The high spin and large number of low-lying states lead to a large low-field magnetic entropy (14.1 J kg-1 K-1 for ΔH = 1 T at 1.1 K) for this material.
Collapse
Affiliation(s)
- Wei-Peng Chen
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, and School of Science, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, China
| | - Jared Singleton
- Department of Physics and Astronomy, Francis Marion University, Florence, SC, 29502, USA
| | - Lei Qin
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, and School of Science, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, China
| | - Agustín Camón
- Instituto de Ciencia de Materiales de Aragón (ICMA) and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, E-50009, Zaragoza, Spain
| | - Larry Engelhardt
- Department of Physics and Astronomy, Francis Marion University, Florence, SC, 29502, USA.
| | - Fernando Luis
- Instituto de Ciencia de Materiales de Aragón (ICMA) and Departamento de Física de la Materia Condensada, CSIC-Universidad de Zaragoza, E-50009, Zaragoza, Spain
| | - Richard E P Winpenny
- Department of Chemistry and Photon Science Institute, The University of Manchester, Manchester, M13 9PL, UK.
| | - Yan-Zhen Zheng
- Frontier Institute of Science and Technology (FIST), State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, and School of Science, Xi'an Jiaotong University, 99 Yanxiang Road, Xi'an, Shaanxi, 710054, China.
| |
Collapse
|
5
|
Lacelle T, Brunet G, Pialat A, Holmberg RJ, Lan Y, Gabidullin B, Korobkov I, Wernsdorfer W, Murugesu M. Single-molecule magnet behaviour in a tetranuclear DyIII complex formed from a novel tetrazine-centered hydrazone Schiff base ligand. Dalton Trans 2017; 46:2471-2478. [DOI: 10.1039/c6dt04413a] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A tetranuclear dysprosium complex, bridged by a novel tetrazine-centered Schiff base ligand, exhibits ferromagnetic exchange coupling and a large anisotropic barrier.
Collapse
Affiliation(s)
- T. Lacelle
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - G. Brunet
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - A. Pialat
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - R. J. Holmberg
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - Y. Lan
- Institut Néel
- CNRS and Université Grenoble Alpes
- 38042 Grenoble
- France
| | - B. Gabidullin
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - I. Korobkov
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| | - W. Wernsdorfer
- Institut Néel
- CNRS and Université Grenoble Alpes
- 38042 Grenoble
- France
- Physikalisches Institut
| | - M. Murugesu
- Department of Chemistry and Biomolecular Sciences
- University of Ottawa
- Ottawa
- Canada
| |
Collapse
|
6
|
Zhang H, Guo L, Xie Z, Xin X, Sun D, Yuan S. Tunable Aggregation-Induced Emission of Polyoxometalates via Amino Acid-Directed Self-Assembly and Their Application in Detecting Dopamine. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13736-13745. [PMID: 27973851 DOI: 10.1021/acs.langmuir.6b03709] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In this work, through the aqueous phase self-assembly of an Eu-containing polyoxometalate (POM), Na9[EuW10O36]·32H2O (EuW10) and different amino acids, we obtained spontaneously formed vesicles that showed luminescence enhancement for EuW10 and arginine (Arg), lysine (Lys), or histidine (His) complexes, but luminescence quenching for EuW10 and glutamic acid (Glu) or aspartic acid (Asp) complexes. The binding mechanisms between them have been explored at the molecular level by using different characterization techniques. It was found that EuW10 acted as polar head groups interact with the positively charged residues for alkaline amino acids, protonated amide groups for acidic amino and nonpolar acid aminos through electrostatic interactions, and the remaining segments of amino acids served as relatively hydrophobic parts aggregated together forming bilayer membrane structures. Moreover, the different influences of amino acids on the fluorescence property of EuW10 revealed that the electrostatic interaction between the positive charged group of amino acid and the polyanionic cluster dominates the fluorescence properties of assemblies. Furthermore, a turn-off sensing application of the EuW10/Arg platform to probe dopamine (DA) against various other biological molecules such as neurotransmitters or amino acids was also established. The concept of combining POMs with amino acids extends the research category of POM-based functional materials and devices.
Collapse
Affiliation(s)
- Han Zhang
- Key Lab for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Jinan, 250100, People's Republic of China
| | - Lingyu Guo
- Key Lab for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Jinan, 250100, People's Republic of China
| | - Zengchun Xie
- National Engineering Technology Research Center for Colloidal Materials, Shandong University , Jinan, 250100, People's Republic of China
| | - Xia Xin
- Key Lab for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Jinan, 250100, People's Republic of China
- National Engineering Technology Research Center for Colloidal Materials, Shandong University , Jinan, 250100, People's Republic of China
| | - Di Sun
- Key Lab for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Jinan, 250100, People's Republic of China
| | - Shiling Yuan
- Key Lab for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University , Jinan, 250100, People's Republic of China
| |
Collapse
|
7
|
Jeanmaire D, Timco GA, Gennari A, Sproules S, Williams KJ, Winpenny REP, Tirelli N. Binary behaviour of an oxidation-responsive MRI nano contrast agent. Chem Commun (Camb) 2015; 51:1074-6. [PMID: 25447319 DOI: 10.1039/c4cc08024f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2024]
Abstract
A new nano contrast agent has been prepared incorporating a molecular magnet in oxidation-responsive nanoparticles; this system has shown a remarkable sensitivity to hydrogen peroxide (detection down to at least 40 μM), which was used as a model reactive oxygen species. Surprisingly, the response had a binary (off/on) character, due to a non-linear cascade relation between extent of oxidation and water permeability in the particles.
Collapse
Affiliation(s)
- Damien Jeanmaire
- Manchester Pharmacy School, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | | | | | | | | | | | | |
Collapse
|
8
|
Mameri S, Ako AM, Yesil F, Hibert M, Lan Y, Anson CE, Powell AK. Coordination Cluster Analogues of the High‐Spin [Mn
19
] System with Functionalized 2,6‐Bis(hydroxymethyl)phenol Ligands. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402327] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Samir Mameri
- Laboratoire d'Innovation Thérapeutique (Medicinal Chemistry Laboratory), University of Strasbourg, UMR 7200‐CNRS, Faculté de Pharmacie, 74, route du Rhin, 67401 Illkirch, France, http://medchem.u‐strasbg.fr/pages/welcome.php
- Current address: Institut de Chimie, UMR 7177/CNRS‐Unistra, University of Strasbourg, 4, rue Blaise Pascal, 67000 Strasbourg, France
| | - Ayuk M. Ako
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany, http://www.aoc.kit.edu/
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany, http://www.int.kit.edu/home.php
| | - Fatma Yesil
- Laboratoire d'Innovation Thérapeutique (Medicinal Chemistry Laboratory), University of Strasbourg, UMR 7200‐CNRS, Faculté de Pharmacie, 74, route du Rhin, 67401 Illkirch, France, http://medchem.u‐strasbg.fr/pages/welcome.php
| | - Marcel Hibert
- Laboratoire d'Innovation Thérapeutique (Medicinal Chemistry Laboratory), University of Strasbourg, UMR 7200‐CNRS, Faculté de Pharmacie, 74, route du Rhin, 67401 Illkirch, France, http://medchem.u‐strasbg.fr/pages/welcome.php
| | - Yanhua Lan
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany, http://www.aoc.kit.edu/
| | - Christopher E. Anson
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany, http://www.aoc.kit.edu/
| | - Annie K. Powell
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany, http://www.aoc.kit.edu/
- Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), P. O. Box 3640, 76021 Karlsruhe, Germany, http://www.int.kit.edu/home.php
| |
Collapse
|
9
|
Pablico-Lansigan MH, Hickling WJ, Japp EA, Rodriguez OC, Ghosh A, Albanese C, Nishida M, Van Keuren E, Fricke S, Dollahon N, Stoll SL. Magnetic nanobeads as potential contrast agents for magnetic resonance imaging. ACS NANO 2013; 7:9040-8. [PMID: 24047405 DOI: 10.1021/nn403647t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Metal-oxo clusters have been used as building blocks to form hybrid nanomaterials and evaluated as potential MRI contrast agents. We have synthesized a biocompatible copolymer based on a water stable, nontoxic, mixed-metal-oxo cluster, Mn8Fe4O12(L)16(H2O)4, where L is acetate or vinyl benzoic acid, and styrene. The cluster alone was screened by NMR for relaxivity and was found to be a promising T2 contrast agent, with r1 = 2.3 mM(-1) s(-1) and r2 = 29.5 mM(-1) s(-1). Initial cell studies on two human prostate cancer cell lines, DU-145 and LNCap, reveal that the cluster has low cytotoxicity and may be potentially used in vivo. The metal-oxo cluster Mn8Fe4(VBA)16 (VBA = vinyl benzoic acid) can be copolymerized with styrene under miniemulsion conditions. Miniemulsion allows for the formation of nanometer-sized paramagnetic beads (~80 nm diameter), which were also evaluated as a contrast agent for MRI. These highly monodispersed, hybrid nanoparticles have enhanced properties, with the option for surface functionalization, making them a promising tool for biomedicine. Interestingly, both relaxivity measurements and MRI studies show that embedding the Mn8Fe4 core within a polymer matrix decreases r2 effects with little effect on r1, resulting in a positive T1 contrast enhancement.
Collapse
Affiliation(s)
- Michele H Pablico-Lansigan
- Department of Chemistry, Georgetown University , 37th and O Streets NW, Washington, D.C. 20057, United States
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Yamamoto Y, Park K. Metastability for the Blume-Capel model with distribution of magnetic anisotropy using different dynamics. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2013; 88:012110. [PMID: 23944417 DOI: 10.1103/physreve.88.012110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 06/21/2013] [Indexed: 06/02/2023]
Abstract
We investigate the relaxation time of magnetization or the lifetime of the metastable state for a spin S=1 square-lattice ferromagnetic Blume-Capel model with distribution of magnetic anisotropy (with small variances), using two different dynamics such as Glauber and phonon-assisted dynamics. At each lattice site, the Blume-Capel model allows three spin projections (+1, 0, -1) and a site-dependent magnetic anisotropy parameter. For each dynamic, we examine the low-temperature lifetime in two dynamic regions with different sizes of the critical droplet and at the boundary between the regions, within the single-droplet regime. We compute the average lifetime of the metastable state for a fixed lattice size, using both kinetic Monte Carlo simulations and the absorbing Markov chains method in the zero-temperature limit. We find that for both dynamics the lifetime obeys a modified Arrhenius-like law, where the energy barrier of the metastable state depends on the temperature and standard deviation of the distribution of magnetic anisotropy for a given field and magnetic anisotropy and that an explicit form of this dependence differs in different dynamic regions for different dynamics. Interestingly, the phonon-assisted dynamic prevents transitions between degenerate states, which results in a large increase in the energy barrier at the region boundary compared to that for the Glauber dynamic. However, the introduction of a small distribution of magnetic anisotropy allows the spin system to relax via lower-energy pathways such that the energy barrier greatly decreases. In addition, for the phonon-assisted dynamic, even the prefactor of the lifetime is substantially reduced for a broad distribution of magnetic anisotropy in both regions considered, in contrast to the Glauber dynamic. Our findings show that overall the phonon-assisted dynamic is more significantly affected by the distribution of magnetic anisotropy than the Glauber dynamic.
Collapse
Affiliation(s)
- Yoh Yamamoto
- Department of Physics, Virginia Tech, Blacksburg, Virginia 24061, USA
| | | |
Collapse
|
11
|
Chen H, Yang Y, Wang Y, Wu L. Synthesis, Structural Characterization, and Thermoresponsivity of Hybrid Supramolecular Dendrimers Bearing a Polyoxometalate Core. Chemistry 2013; 19:11051-61. [DOI: 10.1002/chem.201300289] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 05/03/2013] [Indexed: 11/10/2022]
|
12
|
Revunova K, Gorelsky SI, Lemaire MT. Synthesis and coordination chemistry of a potential precursor to a triarylamminium radical cation ditopic ligand. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.06.059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
Kim B, Schmieder AH, Stacy AJ, Williams TA, Pan D. Sensitive biological detection with a soluble and stable polymeric paramagnetic nanocluster. J Am Chem Soc 2012; 134:10377-80. [PMID: 22693958 PMCID: PMC3397310 DOI: 10.1021/ja3040366] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe the design, synthesis, and biological characterization of manganese oxocluster-based "single molecule magnets (SMMs)". We demonstrate that polymeric micellar nanoparticles can serve as a carrier and help to stabilize delicate SMM molecules from breaking down easily and thus prevent their property loss. Concentrating thousands of Mn-clusters per micelle provided a high ionic and per-particle relaxivity allowing sensitive MR imaging in vivo. This reports one of the earliest examples of in vivo imaging of a rationally designed polymeric micelle that features SMM.
Collapse
Affiliation(s)
- Benjamin Kim
- C-TRAIN and Division of Cardiology, Washington University School of Medicine, 4320 Forest Park Avenue, Saint Louis, Missouri 63108, USA
| | | | | | | | | |
Collapse
|
14
|
Vergnani L, Barra AL, Neugebauer P, Rodriguez-Douton MJ, Sessoli R, Sorace L, Wernsdorfer W, Cornia A. Magnetic Bistability of Isolated Giant-Spin Centers in a Diamagnetic Crystalline Matrix. Chemistry 2012; 18:3390-8. [DOI: 10.1002/chem.201103251] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Indexed: 11/09/2022]
|
15
|
Pablico MH, Mertzman JE, Japp EA, Boncher WL, Nishida M, Van Keuren E, Lofland SE, Dollahon N, Rubinson JF, Holman KT, Stoll SL. Miniemulsion synthesis of metal-oxo cluster containing copolymer nanobeads. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12575-12584. [PMID: 21866918 DOI: 10.1021/la2029774] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hybrid nanobeads containing either a manganese-oxo or manganese-iron-oxo cluster have been prepared via the miniemulsion polymerization technique. Two new ligand substituted oxo clusters, Mn(12)O(12)(VBA)(16)(H(2)O)(4) and Mn(8)Fe(4)O(12)(VBA)(16)(H(2)O)(4) (where VBA = 4-vinylbenzoate), have been prepared and characterized. Polymerization of the functionalized metal-oxo clusters with styrene under miniemulsion conditions produced monodispersed polymer nanoparticles as small as ~60 nm in diameter. The metal-oxo polymer nanobeads were fully characterized in terms of synthetic parameters, composition, structure, and magnetic properties.
Collapse
Affiliation(s)
- Michele H Pablico
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, DC 20057, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|