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Hachani R, Birchall MA, Lowdell MW, Kasparis G, Tung LD, Manshian BB, Soenen SJ, Gsell W, Himmelreich U, Gharagouzloo CA, Sridhar S, Thanh NTK. Assessing cell-nanoparticle interactions by high content imaging of biocompatible iron oxide nanoparticles as potential contrast agents for magnetic resonance imaging. Sci Rep 2017; 7:7850. [PMID: 28798327 PMCID: PMC5552868 DOI: 10.1038/s41598-017-08092-w] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 07/06/2017] [Indexed: 01/03/2023] Open
Abstract
Stem cell tracking in cellular therapy and regenerative medicine is an urgent need, superparamagnetic iron oxide nanoparticles (IONPs) could be used as contrast agents in magnetic resonance imaging (MRI) that allows visualization of the implanted cells ensuring they reach the desired sites in vivo. Herein, we report the study of the interaction of 3,4-dihydroxyhydrocinnamic acid (DHCA) functionalized IONPs that have desirable properties for T2 - weighted MRI, with bone marrow-derived primary human mesenchymal stem cells (hMSCs). Using the multiparametric high-content imaging method, we evaluate cell viability, formation of reactive oxygen species, mitochondrial health, as well as cell morphology and determine that the hMSCs are minimally affected after labelling with IONPs. Their cellular uptake is visualized by transmission electron microscopy (TEM) and Prussian Blue staining, and quantified using an iron specific colourimetric method. In vitro and in vivo studies demonstrate that these IONPs are biocompatible and can produce significant contrast enhancement in T2-weighted MRI. Iron oxide nanoparticles are detected in vivo as hypointense regions in the liver up to two weeks post injection using 9.4 T MRI. These DHCA functionalized IONPs are promising contrast agents for stem cell tracking by T2-weighted MRI as they are biocompatible and show no evidence of cytotoxic effects on hMSCs.
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Affiliation(s)
- Roxanne Hachani
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
- UCL Healthcare and Biomagnetics and Nanomaterials Laboratory, 21 Albemarle Street, London, W1S 4BS, UK
| | - Martin A Birchall
- University College London Ear Institute, 332 Gray's Inn Road, London, WC1X 8EE, UK
| | - Mark W Lowdell
- Department of Haematology, Royal Free Hospital, University College London, London, NW3 2QG, UK
| | - Georgios Kasparis
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
- UCL Healthcare and Biomagnetics and Nanomaterials Laboratory, 21 Albemarle Street, London, W1S 4BS, UK
| | - Le D Tung
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
- UCL Healthcare and Biomagnetics and Nanomaterials Laboratory, 21 Albemarle Street, London, W1S 4BS, UK
| | - Bella B Manshian
- MoSAIC/Biomedical MRI Unit, Department of Imaging and Pathology, University of Leuven, B3000, Leuven, Belgium
| | - Stefaan J Soenen
- MoSAIC/Biomedical MRI Unit, Department of Imaging and Pathology, University of Leuven, B3000, Leuven, Belgium
| | - Willy Gsell
- MoSAIC/Biomedical MRI Unit, Department of Imaging and Pathology, University of Leuven, B3000, Leuven, Belgium
| | - Uwe Himmelreich
- MoSAIC/Biomedical MRI Unit, Department of Imaging and Pathology, University of Leuven, B3000, Leuven, Belgium
| | - Codi A Gharagouzloo
- Gordon Centre for Medical Imaging, Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Nanomedicine Science and Technology Centre, Northeastern University, Boston, Massachusetts, USA
| | - Srinivas Sridhar
- Nanomedicine Science and Technology Centre, Northeastern University, Boston, Massachusetts, USA
- Department of Radiation Oncology, Harvard Medical School, Boston, Massachusetts, USA
| | - Nguyen T K Thanh
- Biophysics Group, Department of Physics and Astronomy, University College London, Gower Street, London, WC1E 6BT, UK.
- UCL Healthcare and Biomagnetics and Nanomaterials Laboratory, 21 Albemarle Street, London, W1S 4BS, UK.
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Dung NT, Long NV, Tam LTT, Nam PH, Tung LD, Phuc NX, Lu LT, Kim Thanh NT. High magnetisation, monodisperse and water-dispersible CoFe@Pt core/shell nanoparticles. Nanoscale 2017; 9:8952-8961. [PMID: 28267161 DOI: 10.1039/c6nr09325f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
High magnetisation and monodisperse CoFe alloy nanoparticles are desired for a wide range of biomedical applications. However, these CoFe nanoparticles are prone to oxidation, resulting in the deterioration of their magnetic properties. In the current work, CoFe alloy nanoparticles were prepared by thermal decomposition of cobalt and iron carbonyls in organic solvents at high temperatures. Using a seeded growth method, we successfully synthesised chemically stable CoFe@Pt core/shell nanostructures. The obtained core/shell nanoparticles have high saturation magnetisation up to 135 emu g-1. The magnetisation value of the core/shell nanoparticles remains 93 emu g-1 after being exposed to air for 12 weeks. Hydrophobic CoFe@Pt nanoparticles were rendered water-dispersible by encapsulating with poly(maleic anhydride-alt-1-octadecene) (PMAO). These nanoparticles were stable in water for at least 3 months and in a wide range of pH from 2 to 11.
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Affiliation(s)
- Ngo T Dung
- Institute for Tropical Technology (ITT)-Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
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Dung NT, Long NV, Tam LTT, Nam PH, Tung LD, Phuc NX, Lu LT, Thanh NTK. Correction: High magnetisation, monodisperse and water-dispersible CoFe@Pt core/shell nanoparticles. Nanoscale 2017; 9:5352. [PMID: 28402381 DOI: 10.1039/c7nr90081c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Correction for 'High magnetisation, monodisperse and water-dispersible CoFe@Pt core/shell nanoparticles' by Ngo T. Dung et al., Nanoscale, 2017, DOI: 10.1039/c6nr09325f.
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Affiliation(s)
- Ngo T Dung
- Institute for Tropical Technology (ITT)-Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
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Lu LT, Dung NT, Tung LD, Thanh CT, Quy OK, Chuc NV, Maenosono S, Thanh NTK. Synthesis of magnetic cobalt ferrite nanoparticles with controlled morphology, monodispersity and composition: the influence of solvent, surfactant, reductant and synthetic conditions. Nanoscale 2015; 7:19596-610. [PMID: 26542630 DOI: 10.1039/c5nr04266f] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
In our present work, magnetic cobalt ferrite (CoFe2O4) nanoparticles have been successfully synthesised by thermal decomposition of Fe(III) and Co(II) acetylacetonate compounds in organic solvents in the presence of oleic acid (OA)/ oleylamine (OLA) as surfactants and 1,2-hexadecanediol (HDD) or octadecanol (OCD-ol) as an accelerating agent. As a result, CoFe2O4 nanoparticles of different shapes were tightly controlled in size (range of 4-30 nm) and monodispersity (standard deviation only at ca. 5%). Experimental parameters, such as reaction time, temperature, surfactant concentration, solvent, precursor ratio, and accelerating agent, in particular, the role of HDD, OCD-ol, and OA/OLA have been intensively investigated in detail to discover the best conditions for the synthesis of the above magnetic nanoparticles. The obtained nanoparticles have been successfully applied for producing oriented carbon nanotubes (CNTs), and they have potential to be used in biomedical applications.
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Affiliation(s)
- Le T Lu
- Institute for Tropical Technology -Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, CauGiay, Hanoi, Vietnam.
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Chen B, Laverock J, Newby D, McNulty JF, Smith KE, Glans PA, Guo JH, Qiao RM, Yang WL, Lees MR, Tung LD, Singh RP, Balakrishnan G. Effects of rare-earth size on the electronic structure of La1−xLuxVO3. J Phys Condens Matter 2015; 27:105503. [PMID: 25710627 DOI: 10.1088/0953-8984/27/10/105503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The electronic structure of La(1-x)Lu(x)VO(3)(x = 0, 0.2, 0.6 and 1) single crystals has been investigated using soft x-ray absorption spectroscopy, soft x-ray emission spectroscopy, and resonant soft x-ray inelastic scattering to study the effects of rare-earth size. The x-ray absorption and emission spectra at the O K-edge present a progressive evolution with R-site cation, in agreement with local spin density approximation calculations. This evolution with R, together with the temperature dependence of the O K-edge spectra, is attributed to changes in the crystal structure of La(1-x)Lu(x)VO(3). The crystal-field dd. excitations probed by resonant inelastic x-ray scattering at the V L(3)-edge exhibit an increase in energy and enhanced intensity with the decrease of R-site ionic radius, which is mainly attributed to the increased tilting magnitude of the VO(6) octahedra. Upon cooling to ~95 K, the dd* excitations are prominently enhanced in relative Intensity, in agreement with the formation of the Jahn.Teller distortion int he orbital ordering phase. Additionally, the dd* transitions of the mixed compounds are noticeably suppressed with respect to those of the pure compounds, possibly owing to the formation of C-type orbital ordering induced by large R-site size variances.
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Affiliation(s)
- B Chen
- Department of Physics, Boston University, Boston, MA 02215, USA.
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Laverock J, Chen B, Preston ARH, Newby D, Piper LFJ, Tung LD, Balakrishnan G, Glans PA, Guo JH, Smith KE. Low-energy V t2g orbital excitations in NdVO3. J Phys Condens Matter 2014; 26:455603. [PMID: 25336521 DOI: 10.1088/0953-8984/26/45/455603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The electronic structure of NdVO(3) and YVO(3) has been investigated as a function of sample temperature using resonant inelastic soft x-ray scattering at the V L(3)-edge. Most of the observed spectral features are in good agreement with an atomic crystal-field multiplet model. However, a low energy feature is observed at ∼ 0.4 eV that cannot be explained by crystal-field arguments. The resonant behaviour of this feature establishes it as due to excitations of the V t(2g) states. Moreover, this feature exhibits a strong sample temperature dependence, reaching maximum intensity in the orbitally-ordered phase of NdVO(3), before becoming suppressed at low temperatures. This behaviour indicates that the origin of this feature is a collective orbital excitation, i.e. the bi-orbiton.
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Affiliation(s)
- J Laverock
- Department of Physics, Boston University, 590 Commonwealth Avenue, Boston, MA 02215, USA
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Robinson I, Tung LD, Maenosono S, Wälti C, Thanh NTK. Synthesis of core-shell gold coated magnetic nanoparticles and their interaction with thiolated DNA. Nanoscale 2010; 2:2624-30. [PMID: 20967339 DOI: 10.1039/c0nr00621a] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Core-shell magnetic nanoparticles have received significant attention recently and are actively investigated owing to their large potential for a variety of applications. Here, the synthesis and characterization of bimetallic nanoparticles containing a magnetic core and a gold shell are discussed. The gold shell facilitates, for example, the conjugation of thiolated biological molecules to the surface of the nanoparticles. The composite nanoparticles were produced by the reduction of a gold salt on the surface of pre-formed cobalt or magnetite nanoparticles. The synthesized nanoparticles were characterized using ultraviolet-visible absorption spectroscopy, transmission electron microscopy, energy dispersion X-ray spectroscopy, X-ray diffraction and super-conducting quantum interference device magnetometry. The spectrographic data revealed the simultaneous presence of cobalt and gold in 5.6±0.8 nm alloy nanoparticles, and demonstrated the presence of distinct magnetite and gold phases in 9.2±1.3 nm core-shell magnetic nanoparticles. The cobalt-gold nanoparticles were of similar size to the cobalt seed, while the magnetite-gold nanoparticles were significantly larger than the magnetic seeds, indicating that different processes are responsible for the addition of the gold shell. The effect on the magnetic properties by adding a layer of gold to the cobalt and magnetite nanoparticles was studied. The functionalization of the magnetic nanoparticles is demonstrated through the conjugation of thiolated DNA to the gold shell.
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Affiliation(s)
- Ian Robinson
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK
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Ung D, Tung LD, Caruntu G, Delaportas D, Alexandrou I, Prior IA, Thanh NTK. Variant shape growth of nanoparticles of metallic Fe–Pt, Fe–Pd and Fe–Pt–Pd alloys. CrystEngComm 2009. [DOI: 10.1039/b823290n] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Parkes LM, Hodgson R, Lu LT, Tung LD, Robinson I, Fernig DG, Thanh NTK. Cobalt nanoparticles as a novel magnetic resonance contrast agent-relaxivities at 1.5 and 3 Tesla. Contrast Media Mol Imaging 2008; 3:150-6. [DOI: 10.1002/cmmi.241] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Robinson I, Alexander C, Lu LT, Tung LD, Fernig DG, Thanh NTK. One-step synthesis of monodisperse water-soluble 'dual-responsive' magnetic nanoparticles. Chem Commun (Camb) 2007:4602-4. [PMID: 17989805 DOI: 10.1039/b713528a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Monodisperse water-soluble Co and gamma-Fe(2)O(3) nanoparticles have been prepared in a single-step method using stimuli-sensitive polymers.
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Affiliation(s)
- Ian Robinson
- Department of Chemistry, University of Liverpool, Liverpool, UK
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Thanh NTK, Puntes VF, Tung LD, Fernig DG. Peptides as capping ligands for in situ synthesis of water soluble Co nanoparticles for bioapplications. ACTA ACUST UNITED AC 2005. [DOI: 10.1088/1742-6596/17/1/012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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