1
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Singh K, Wychowaniec JK, Edwards-Gayle CJC, Reynaud EG, Rodriguez BJ, Brougham DF. Structure-dynamics correlations in composite PF127-PEG-based hydrogels; cohesive/hydrophobic interactions determine phase and rheology and identify the role of micelle concentration in controlling 3D extrusion printability. J Colloid Interface Sci 2024; 660:302-313. [PMID: 38244497 DOI: 10.1016/j.jcis.2023.12.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 12/19/2023] [Accepted: 12/26/2023] [Indexed: 01/22/2024]
Abstract
A library of composite polymer networks (CPNs) were formed by combining Pluronic F127, as the primary gelator, with a range of di-acrylate functionalised PEG polymers, which tune the rheological properties and provide UV crosslinkability. A coarse-grained sol-gel room temperature phase diagram was constructed for the CPN library, which identifies PEG-dependent disruption of micelles as leading to liquefication. Small angle X-ray scattering and rheological measurements provide detailed insight into; (i) micelle-micelle ordering; (ii) micelle-micelle disruption, and; (iii) acrylate-micelle disruption; with contributions that depend on composition, including weak PEG chain length and end group effects. The influence of composition on 3D extrusion printability through modulation of the cohesive/hydrophobic interactions was assessed. It was found that only micelle content provides consistent changes in printing fidelity, controlled largely by printing conditions (pressure and feed rate). Finally, the hydrogels were shown to be UV photo-crosslinkable, which further improves fidelity and structural integrity, and usefully reduces the mesh size. Our results provide a guide for design of 3D-printable CPN inks for future biomedical applications.
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Affiliation(s)
- Krutika Singh
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Jacek K Wychowaniec
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland; AO Research Institute Davos, Clavadelerstrasse 8, 7270, Davos, Switzerland.
| | | | - Emmanuel G Reynaud
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brian J Rodriguez
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland; School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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2
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Khandelia R, Hodgkinson T, Crean D, Brougham DF, Scholz D, Ibrahim H, Quinn SJ, Rodriguez BJ, Kennedy OD, O’Byrne JM, Brayden DJ. Reproducible Synthesis of Biocompatible Albumin Nanoparticles Designed for Intra-articular Administration of Celecoxib to Treat Osteoarthritis. ACS Appl Mater Interfaces 2024; 16:14633-14644. [PMID: 38483312 PMCID: PMC10982941 DOI: 10.1021/acsami.4c02243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 02/27/2024] [Accepted: 02/27/2024] [Indexed: 04/04/2024]
Abstract
Osteoarthritis (OA) is the most common form of arthritis, with intra-articular (IA) delivery of therapeutics being the current best option to treat pain and inflammation. However, IA delivery is challenging due to the rapid clearance of therapeutics from the joint and the need for repeated injections. Thus, there is a need for long-acting delivery systems that increase the drug retention time in joints with the capacity to penetrate OA cartilage. As pharmaceutical utility also demands that this is achieved using biocompatible materials that provide colloidal stability, our aim was to develop a nanoparticle (NP) delivery system loaded with the COX-2 inhibitor celecoxib that can meet these criteria. We devised a reproducible and economical method to synthesize the colloidally stable albumin NPs loaded with celecoxib without the use of any of the following conditions: high temperatures at which albumin denaturation occurs, polymer coatings, oils, Class 1/2 solvents, and chemical protein cross-linkers. The spherical NP suspensions were biocompatible, monodisperse with average diameters of 72 nm (ideal for OA cartilage penetration), and they were stable over 6 months at 4 °C. Moreover, the NPs loaded celecoxib at higher levels than those required for the therapeutic response in arthritic joints. For these reasons, they are the first of their kind. Labeled NPs were internalized by primary human articular chondrocytes cultured from the knee joints of OA patients. The NPs reduced the concentration of inflammatory mediator prostaglandin E2 released by the primaries, an indication of retained bioactivity following NP synthesis. Similar results were observed in lipopolysaccharide-stimulated human THP-1 monocytes. The IA administration of these NPs is expected to avoid side-effects associated with oral administration of celecoxib and to maintain a high local concentration in the knee joint over a sustained period. They are now ready for evaluation by IA administration in animal models of OA.
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Affiliation(s)
- Rumi Khandelia
- UCD
School of Veterinary Medicine, University
College Dublin, Belfield, Dublin D04 V1W8, Ireland
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Tom Hodgkinson
- Department
of Anatomy and Regenerative Medicine, Royal
College of Surgeons in Ireland, 123 St. Stephen’s Green, Dublin D02 YN77, Ireland
| | - Daniel Crean
- UCD
School of Veterinary Medicine, University
College Dublin, Belfield, Dublin D04 V1W8, Ireland
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Dermot F. Brougham
- UCD
School of Chemistry, University College
Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Dimitri Scholz
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Hossam Ibrahim
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
- UCD
School of Physics, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Susan J. Quinn
- UCD
School of Chemistry, University College
Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Brian J. Rodriguez
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
- UCD
School of Physics, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
| | - Oran D. Kennedy
- Department
of Anatomy and Regenerative Medicine, Royal
College of Surgeons in Ireland, 123 St. Stephen’s Green, Dublin D02 YN77, Ireland
| | - John M. O’Byrne
- National
Orthopaedics Hospital Cappagh, Dublin D11 EV29, Ireland
| | - David J. Brayden
- UCD
School of Veterinary Medicine, University
College Dublin, Belfield, Dublin D04 V1W8, Ireland
- UCD
Conway Institute, University College Dublin, Belfield, Dublin D04 V1W8, Ireland
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3
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Barra A, Wychowaniec JK, Winning D, Cruz MM, Ferreira LP, Rodriguez BJ, Oliveira H, Ruiz-Hitzky E, Nunes C, Brougham DF, Ferreira P. Magnetic Chitosan Bionanocomposite Films as A Versatile Platform for Biomedical Hyperthermia. Adv Healthc Mater 2023:e2303861. [PMID: 38041539 DOI: 10.1002/adhm.202303861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Indexed: 12/03/2023]
Abstract
Responsive magnetic nanomaterials offer significant advantages for innovative therapies, for instance in cancer treatments that exploit on-demand delivery on alternating magnetic field (AMF) stimulus. In this work, biocompatible magnetic bionanocomposite films are fabricated from chitosan by film casting with incorporation of magnetite nanoparticles (MNPs) produced by facile one pot synthesis. The influence of synthesis conditions and MNP concentration on the films heating efficiency and heat dissipation are evaluated, through spatio-temporally mapping of the surface temperature changes by video-thermography. The cast films have a thickness below 100 μm and upon exposure to AMF (663 kHz, 12.8 kA m-1 ) induce exceptionally strong heating, reaching a maximum temperature increase of 82°C within 270 s irradiation. Further, we demonstrate that the films can serve as substrates that supply heat for multiple hyperthermia scenarios, including: (i) non-contact automated heating of cell culture medium; (ii) heating of gelatine-based hydrogels of different shapes, and (iii) killing cancerous melanoma cells. The films are versatile components for non-contact stimulus with translational potential in multiple biomedical applications. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Ana Barra
- Department of Materials and Ceramic Engineering, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
- Materials Science Institute of Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, Madrid, 28049, Spain
| | - Jacek K Wychowaniec
- School of Chemistry, University College Dublin, Dublin 4, Belfield, Ireland
- AO Research Institute Davos, Clavadelerstrasse 8, Davos, 7270, Switzerland
| | - Danielle Winning
- School of Chemistry, University College Dublin, Dublin 4, Belfield, Ireland
| | - Maria Margarida Cruz
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal
| | - Liliana P Ferreira
- Biosystems and Integrative Sciences Institute (BioISI), Faculdade de Ciências, Universidade de Lisboa, Lisboa, 1749-016, Portugal
- Physics Department, University of Coimbra, Coimbra, 3004-516, Portugal
| | - Brian J Rodriguez
- School of Physics & Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Dublin 4, Belfield, Ireland
| | - Helena Oliveira
- Department of Biology and CESAM, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Eduardo Ruiz-Hitzky
- Materials Science Institute of Madrid, CSIC, c/Sor Juana Inés de la Cruz 3, Madrid, 28049, Spain
| | - Cláudia Nunes
- Department of Materials and Ceramic Engineering, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Dublin 4, Belfield, Ireland
| | - Paula Ferreira
- Department of Materials and Ceramic Engineering, CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
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4
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Jenne A, Soong R, Gruschke O, Bastawrous M, Monks P, Moloney C, Brougham DF, Busse F, Bermel W, Courtier-Murias D, Wu B, Simpson A. A holistic NMR framework to understand environmental impact: Examining the impacts of superparamagnetic iron oxide nanoparticles (SPIONs) in Daphnia magna via imaging, spectroscopy, and metabolomics. Magn Reson Chem 2023; 61:728-739. [PMID: 36137948 DOI: 10.1002/mrc.5315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIONs) are a contaminant of emerging interest, often used in the medical field as an imaging contrast agent, with additional uses in wastewater treatment and as food additives. Although the use of SPIONs is increasing, little research has been conducted on the toxic impacts to living organisms beyond traditional lethal concentration endpoints. Daphnia magna are model organisms for aquatic toxicity testing with a well understood metabolome and high sensitivity to SPIONs. Thus, as environmental concentrations continue to increase, it is becoming critical to understand their sub-lethal toxicity. Due to the paramagnetic nature of SPIONs, a range of potential nuclear magnetic resonance spectroscopy (NMR) experiments are possible, offering the potential to probe the physical location (via imaging), binding (via relaxation weighted spectroscopy), and the biochemical pathways impacted (via in vivo metabolomics). Results indicate binding to carbohydrates, likely chitin in the exoskeleton, along with a decrease in energy metabolites and specific biomarkers of oxidative stress. The holistic NMR framework used here helps provide a more comprehensive understanding of SPIONs impacts on D. magna and showcases NMR's versatility in providing physical, chemical, and biochemical insights.
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Affiliation(s)
- Amy Jenne
- Environmental NMR Center, University of Toronto Scarborough, Scarborough, Ontario, Canada
| | - Ronald Soong
- Environmental NMR Center, University of Toronto Scarborough, Scarborough, Ontario, Canada
| | | | - Monica Bastawrous
- Environmental NMR Center, University of Toronto Scarborough, Scarborough, Ontario, Canada
| | - Patricia Monks
- Department of Chemistry, RCSI University of Health Sciences, Dublin, Ireland
| | - Cara Moloney
- School of Medicine, BioDiscovery Institute-3, University of Nottingham, University Park, Nottingham, UK
| | | | | | | | - Denis Courtier-Murias
- Université Gustave Eiffel, GERS-LEE, Bouguenais, France
- Institut de Recherche en Sciences et Techniques de la Ville IRSTV, CNRS, Nantes, France
| | - Bing Wu
- Institute for Molecules and Materials, Radboud University, Nijmegen, The Netherlands
| | - Andre Simpson
- Environmental NMR Center, University of Toronto Scarborough, Scarborough, Ontario, Canada
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5
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Walsh CM, Wychowaniec JK, Costello L, Brougham DF, Dooley D. An In Vitro and Ex Vivo Analysis of the Potential of GelMA Hydrogels as a Therapeutic Platform for Preclinical Spinal Cord Injury. Adv Healthc Mater 2023; 12:e2300951. [PMID: 37114899 DOI: 10.1002/adhm.202300951] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Indexed: 04/29/2023]
Abstract
Spinal cord injury (SCI) is a devastating condition with no curative therapy currently available. Immunomodulation can be applied as a therapeutic strategy to drive alternative immune cell activation and promote a proregenerative injury microenvironment. Locally injected hydrogels carrying immunotherapeutic cargo directly to injured tissue offer an encouraging treatment approach from an immunopharmacological perspective. Gelatin methacrylate (GelMA) hydrogels are promising in this regard, however, detailed analysis on the immunogenicity of GelMA in the specific context of the SCI microenvironment is lacking. Here, the immunogenicity of GelMA hydrogels formulated with a translationally relevant photoinitiator is analyzed in vitro and ex vivo. 3% (w/v) GelMA, synthesized from gelatin type-A, is first identified as the optimal hydrogel formulation based on mechanical properties and cytocompatibility. Additionally, 3% GelMA-A does not alter the expression profile of key polarization markers in BV2 microglia or RAW264.7 macrophages after 48 h. Finally, it is shown for the first time that 3% GelMA-A can support the ex vivo culture of primary murine organotypic spinal cord slices for 14 days with no direct effect on glial fibrillary acidic protein (GFAP+ ) astrocyte or ionized calcium-binding adaptor molecule 1 (Iba-1+ ) microglia reactivity. This provides evidence that GelMA hydrogels can act as an immunotherapeutic hydrogel-based platform for preclinical SCI.
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Affiliation(s)
- Ciara M Walsh
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
- UCD Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
| | - Jacek K Wychowaniec
- School of Chemistry, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
- AO Research Institute Davos, Clavadelerstrasse 8, Davos, 7270, Switzerland
| | - Louise Costello
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
| | - Dearbhaile Dooley
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
- UCD Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin, D04 V1W8, Ireland
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6
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Lyons S, Baile Pomares P, Vidal L, McGarry K, Morrin A, Brougham DF. Surface Potential Modulation in Boronate-Functionalized Magnetic Nanoparticles Reveals Binding Interactions: Toward Magnetophoretic Capture/Quantitation of Sugars from Extracellular Matrix. Langmuir 2023. [PMID: 37235552 DOI: 10.1021/acs.langmuir.3c00462] [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: 05/28/2023]
Abstract
Phenylboronic acids (BAs) are important synthetic receptors that bind reversibly to cis-diols enabling their use in molecular sensing. When conjugated to magnetic iron oxide nanoparticles, BAs have potential for application in separations and enrichment. Realizing this will require a new understanding of their inherent binding modes and measurement of their binding capacity and their stability in/extractability from complex environments. In this work, 3-aminophenylboronic acid was functionalized to superparamagnetic iron oxide nanoparticles (MNPs, core diameter 8.9 nm) to provide stable aqueous suspensions of functionalized particles (BA-MNPs). The progress of sugar binding and its impact on BA-MNP colloidal stability were monitored through the pH-dependence of hydrodynamic size and zeta potential during incubation with a range of saccharides. This provided the first direct observation of boronate ionization pKa in grafted BA, which in the absence of sugar shifted to a slightly more basic pH than free BA. On exposure to sugar solutions under MNP-limiting conditions, pKa moved progressively to lower pH as maximum capacity was gradually attained. The pKa shift is shown to be greater for sugars with greater BA binding affinity, and on-particle sugar exchange effects were inferred. Colloidal dispersion of BA-MNPs after binding was shown for all sugars at all pHs studied, which enabled facile magnetic extraction of glucose from agarose and cultured extracellular matrix expanded in serum-free media. Bound glucose, quantified following magnetophoretic capture, was found to be proportional to the solution glucose content under glucose-limiting conditions expected for the application. The implications for the development of MNP-immobilized ligands for selective magnetic biomarker capture and quantitation from the extracellular environment are discussed.
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Affiliation(s)
- Stephen Lyons
- SFI Insight Centre for Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Paola Baile Pomares
- Departamento de Química Analítica, Nutrición y Bromatología, Instituto Universitario de Materiales, Universidad de Alicante, PO Box 99, 03080 Alicante, Spain
| | - Lorena Vidal
- Departamento de Química Analítica, Nutrición y Bromatología, Instituto Universitario de Materiales, Universidad de Alicante, PO Box 99, 03080 Alicante, Spain
| | - Katie McGarry
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Aoife Morrin
- SFI Insight Centre for Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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7
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Faux DA, Istók Ö, Rahaman AA, McDonald PJ, McKiernan E, Brougham DF. Nuclear spin relaxation in aqueous paramagnetic ion solutions. Phys Rev E 2023; 107:054605. [PMID: 37328976 DOI: 10.1103/physreve.107.054605] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 04/20/2023] [Indexed: 06/18/2023]
Abstract
A Brownian shell model describing the random rotational motion of a spherical shell of uniform particle density is presented and validated by molecular dynamics simulations. The model is applied to proton spin rotation in aqueous paramagnetic ion complexes to yield an expression for the Larmor-frequency-dependent nuclear magnetic resonance spin-lattice relaxation rate T_{1}^{-1}(ω) describing the dipolar coupling of the nuclear spin of the proton with the electronic spin of the ion. The Brownian shell model provides a significant enhancement to existing particle-particle dipolar models without added complexity, allowing fits to experimental T_{1}^{-1}(ω) dispersion curves without arbitrary scaling parameters. The model is successfully applied to measurements of T_{1}^{-1}(ω) from aqueous manganese(II), iron(III), and copper(II) systems where the scalar coupling contribution is known to be small. Appropriate combinations of Brownian shell and translational diffusion models, representing the inner and outer sphere relaxation contributions, respectively, are shown to provide excellent fits. Quantitative fits are obtained to the full dispersion curve of each aquoion with just five fit parameters, with the distance and time parameters each taking a physically justifiable numerical value.
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Affiliation(s)
- David A Faux
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | | | | | | | - Eoin McKiernan
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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8
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Treacy NJ, Clerkin S, Davis JL, Kennedy C, Miller AF, Saiani A, Wychowaniec JK, Brougham DF, Crean J. Growth and differentiation of human induced pluripotent stem cell (hiPSC)-derived kidney organoids using fully synthetic peptide hydrogels. Bioact Mater 2023; 21:142-156. [PMID: 36093324 PMCID: PMC9420433 DOI: 10.1016/j.bioactmat.2022.08.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 06/27/2022] [Accepted: 08/01/2022] [Indexed: 11/15/2022] Open
Abstract
Human induced pluripotent stem cell (hiPSC)-derived kidney organoids have prospective applications ranging from basic disease modelling to personalised medicine. However, there remains a necessity to refine the biophysical and biochemical parameters that govern kidney organoid formation. Differentiation within fully-controllable and physiologically relevant 3D growth environments will be critical to improving organoid reproducibility and maturation. Here, we matured hiPSC-derived kidney organoids within fully synthetic self-assembling peptide hydrogels (SAPHs) of variable stiffness (storage modulus, G'). The resulting organoids contained complex structures comparable to those differentiated within the animal-derived matrix, Matrigel. Single-cell RNA sequencing (scRNA-seq) was then used to compare organoids matured within SAPHs to those grown within Matrigel or at the air-liquid interface. A total of 13,179 cells were analysed, revealing 14 distinct clusters. Organoid compositional analysis revealed a larger proportion of nephron cell types within Transwell-derived organoids, while SAPH-derived organoids were enriched for stromal-associated cell populations. Notably, differentiation within a higher G' SAPH generated podocytes with more mature gene expression profiles. Additionally, maturation within a 3D microenvironment significantly reduced the derivation of off-target cell types, which are a known limitation of current kidney organoid protocols. This work demonstrates the utility of synthetic peptide-based hydrogels with a defined stiffness, as a minimally complex microenvironment for the selected differentiation of kidney organoids.
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Affiliation(s)
- Niall J Treacy
- Diabetes Complications Research Centre, University College Dublin (UCD) Conway Institute of Biomolecular and Biomedical Research and Belfield, Dublin 4, Ireland.,UCD School of Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland
| | - Shane Clerkin
- Diabetes Complications Research Centre, University College Dublin (UCD) Conway Institute of Biomolecular and Biomedical Research and Belfield, Dublin 4, Ireland.,UCD School of Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland
| | - Jessica L Davis
- Diabetes Complications Research Centre, University College Dublin (UCD) Conway Institute of Biomolecular and Biomedical Research and Belfield, Dublin 4, Ireland.,UCD School of Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland
| | - Ciarán Kennedy
- Diabetes Complications Research Centre, University College Dublin (UCD) Conway Institute of Biomolecular and Biomedical Research and Belfield, Dublin 4, Ireland.,UCD School of Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland
| | - Aline F Miller
- Department of Materials & Manchester Institute of Biotechnology (MIB), School of Natural Sciences, Faculty of Science and Engineering, The University of Manchester, UK
| | - Alberto Saiani
- Department of Materials & Manchester Institute of Biotechnology (MIB), School of Natural Sciences, Faculty of Science and Engineering, The University of Manchester, UK
| | - Jacek K Wychowaniec
- UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - John Crean
- Diabetes Complications Research Centre, University College Dublin (UCD) Conway Institute of Biomolecular and Biomedical Research and Belfield, Dublin 4, Ireland.,UCD School of Biomolecular and Biomedical Science, Belfield, Dublin 4, Ireland
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9
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Moloney C, Roy Chaudhuri T, Spernyak JA, Straubinger RM, Brougham DF. Long-circulating magnetoliposomes as surrogates for assessing pancreatic tumour permeability and nanoparticle deposition. Acta Biomater 2023; 158:611-624. [PMID: 36603732 PMCID: PMC10022638 DOI: 10.1016/j.actbio.2022.12.057] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/29/2022] [Accepted: 12/26/2022] [Indexed: 01/03/2023]
Abstract
Nanocarriers are candidates for cancer chemotherapy delivery, with growing numbers of clinically-approved nano-liposomal formulations such as Doxil® and Onivyde® (liposomal doxorubicin and irinotecan) providing proof-of-concept. However, their complex biodistribution and the varying susceptibility of individual patient tumours to nanoparticle deposition remains a clinical challenge. Here we describe the preparation, characterisation, and biological evaluation of phospholipidic structures containing solid magnetic cores (SMLs) as an MRI-trackable surrogate that could aid in the clinical development and deployment of nano-liposomal formulations. Through the sequential assembly of size-defined iron oxide nanoparticle clusters with a stabilizing anionic phospholipid inner monolayer and an outer monolayer of independently-selectable composition, SMLs can mimic physiologically a wide range of nano-liposomal carrier compositions. In patient-derived xenograft models of pancreatic adenocarcinoma, similar tumour deposition of SML and their nano-liposomal counterparts of identical bilayer composition was observed in vivo, both at the tissue level (fluorescence intensities of 1.5 × 108 ± 1.8 × 107 and 1.2 × 108 ± 6.3 × 107, respectively; ns, 99% confidence interval) and non-invasively using MR imaging. We observed superior capabilities of SML as a surrogate for nano-liposomal formulations as compared to other clinically-approved iron oxide nano-formulations (ferumoxytol). In combination with diagnostic and therapeutic imaging tools, SMLs have high clinical translational potential to predict nano-liposomal drug carrier deposition and could assist in stratifying patients into treatment regimens that promote optimal tumour deposition of nanoparticulate chemotherapy carriers. STATEMENT OF SIGNIFICANCE: Solid magnetoliposomes (SMLs) with compositions resembling that of FDA-approved agents such as Doxil® and Onivyde® offer potential application as non-invasive MRI stratification agents to assess extent of tumour deposition of nano-liposomal therapeutics prior to administration. In animals with pancreatic adenocarcinoma (PDAC), SML-PEG exhibited (i) tumour deposition comparable to liposomes of the same composition; (ii) extended circulation times, with continued tumour deposition up to 24 hours post-injection; and (iii) MRI capabilities to determine tumour deposition up to 1 week post-injection, and confirmation of patient-to-patient variation in nanoparticulate deposition in tumours. Hence SMLs with controlled formulation are a step towards non-invasive MRI stratification approaches for patients, enabled by evaluation of the extent of deposition in tumours prior to administration of nano-liposomal therapeutics.
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Affiliation(s)
- Cara Moloney
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Tista Roy Chaudhuri
- Dept. of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14214, USA
| | - Joseph A Spernyak
- Department of Cell Stress Biology Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Robert M Straubinger
- Dept. of Pharmaceutical Sciences, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, State University of New York, Buffalo, NY 14214, USA; Department of Cell Stress Biology Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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10
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MacMahon E, Brougham DF. pH Dependence of MRI Contrast in Magnetic Nanoparticle Suspensions Demonstrates Inner-Sphere Relaxivity Contributions and Reveals the Mechanism of Dissolution. Langmuir 2023; 39:2171-2181. [PMID: 36734523 PMCID: PMC9933532 DOI: 10.1021/acs.langmuir.2c02621] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Superparamagnetic iron oxide nanoparticles, MNPs, are under investigation as stimulus-responsive nanocarriers that can be tracked by magnetic resonance imaging. However, fundamental questions remain, including the effect of differing surface chemistries on MR image contrast efficacy (relaxivity), both initially and over time in the biological environment. The effects of pH and ligand type on the relaxivity of electrostatically and sterically stabilized spherical 8.8 nm superparamagnetic MNP suspensions are described. It is shown for the first time that across the pH ranges, within which the particles are fully dispersed, increasing acidity progressively reduces relaxivity for all ligand types. This effect is stronger for electrostatically (citrate or APTES) than for sterically stabilized (PEG5000) MNPs. NMR relaxation profiles (relaxivity as a function of 1H Larmor frequency) identified an inner-sphere effect, arising from the protonation of bare oxide or low-molecular-weight-bound species, as the cause. The suppression is not accounted for by the accepted model (SPM theory) and is contrary to previous reports of increased relaxivity at lower pH for paramagnetic iron oxide nanoparticles. We propose that the suppression arises from the orientation of water molecules, with the oxygen atom facing the surface increasingly preferred with increasing surface protonation. For APTES-stabilized MNPs, pendant amines and the silane layer confer exceptional chemical and colloidal stability at low pH. Dissolution of these particles at pH 1.8 was monitored over several months by combining in situ measurements of relaxation profiles with dynamic light scattering. It was shown that particles are magnetically intact for extended periods until they rapidly dissolve, once the silane layer is breached, in a process that is apparently second order in particle concentration. The findings are of interest for tracking MNP fate, for quantitation, and for retention of magnetic responsiveness in biological settings.
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11
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Shingte S, Phakatkar AH, McKiernan E, Nigoghossian K, Ferguson S, Shahbazian-Yassar R, Brougham DF. Correlating Magnetic Hyperthermia and Magnetic Resonance Imaging Contrast Performance of Cubic Iron Oxide Nanoparticles with Crystal Structural Integrity. Chem Mater 2022; 34:10801-10810. [PMID: 36590705 PMCID: PMC9798828 DOI: 10.1021/acs.chemmater.2c00708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 07/27/2022] [Indexed: 06/17/2023]
Abstract
Magnetic iron oxide nanoparticles have multiple biomedical applications in AC-field hyperthermia and magnetic resonance imaging (MRI) contrast enhancement. Here, two cubic particle suspensions are analyzed in detail, one suspension displayed strong magnetic heating and MRI contrast efficacies, while the other responded weakly. This is despite them having almost identical size, morphology, and colloidal dispersion. Aberration-corrected scanning transmission electron microscopy, electron energy loss spectroscopy, and high-resolution transmission electron microscopy analysis confirmed that the spinel phase Fe3O4 was present in both samples and identified prominent crystal lattice defects for the weakly responding one. These are interpreted as frustrating the orientation of the moment within the cubic crystals. The relationship between crystal integrity and the moment magnitude and dynamics is elucidated for the case of fully dispersed single nanocubes, and its connection with the emergent hyperthermia and MRI contrast responses is established.
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Affiliation(s)
| | - Abhijit H. Phakatkar
- Department
of Biomedical Engineering, University of
Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Eoin McKiernan
- School
of Chemistry, University College Dublin, Dublin 4, Ireland
| | | | - Steven Ferguson
- School
of Chemical and Bioprocess Engineering, University College Dublin, Dublin 4, Ireland
| | - Reza Shahbazian-Yassar
- Department
of Mechanical and Industrial Engineering, University of Illinois at Chicago, Chicago, Illinois 60607-7042, United States
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12
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Wychowaniec JK, Brougham DF. Emerging Magnetic Fabrication Technologies Provide Controllable Hierarchically-Structured Biomaterials and Stimulus Response for Biomedical Applications. Adv Sci (Weinh) 2022; 9:e2202278. [PMID: 36228106 PMCID: PMC9731717 DOI: 10.1002/advs.202202278] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/12/2022] [Indexed: 06/16/2023]
Abstract
Multifunctional nanocomposites which exhibit well-defined physical properties and encode spatiotemporally-controlled responses are emerging as components for advanced responsive systems. For biomedical applications magnetic nanocomposite materials have attracted significant attention due to their ability to respond to spatially and temporally varying magnetic fields. The current state-of-the-art in development and fabrication of magnetic hydrogels toward biomedical applications is described. There is accelerating progress in the field due to advances in manufacturing capabilities. Three categories can be identified: i) Magnetic hydrogelation, DC magnetic fields are used during solidification/gelation for aligning particles; ii) additive manufacturing of magnetic materials, 3D printing technologies are used to develop spatially-encoded magnetic properties, and more recently; iii) magnetic additive manufacturing, magnetic responses are applied during the printing process to develop increasingly complex structural arrangement that may recapitulate anisotropic tissue structure and function. The magnetic responsiveness of conventionally and additively manufactured magnetic hydrogels are described along with recent advances in soft magnetic robotics, and the categorization is related to final architecture and emergent properties. Future challenges and opportunities, including the anticipated role of combinatorial approaches in developing 4D-responsive functional materials for tackling long-standing problems in biomedicine including production of 3D-specified responsive cell scaffolds are discussed.
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Affiliation(s)
- Jacek K. Wychowaniec
- School of ChemistryUniversity College DublinBelfieldDublin 4Ireland
- AO Research Institute DavosClavadelerstrasse 8Davos7270Switzerland
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13
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Mulrooney SL, O'Neill GJ, Brougham DF, O'Riordan D. Enhancing the bioaccessibility of vitamin D using mixed micelles - An in vitro study. Food Chem 2022; 395:133634. [PMID: 35830776 DOI: 10.1016/j.foodchem.2022.133634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 06/03/2022] [Accepted: 07/02/2022] [Indexed: 11/04/2022]
Abstract
Vitamin-D deficiency is a global issue and a food fortification strategy may reduce deficiency levels. Mixed micelles (MM) are crucial to vitamin-D absorption in vivo and may enhance vitamin-D food fortification. This study compared the ability of MM based delivery systems to oil-in-water emulsions to improve vitamin-D bioaccessibility in vitro. Vitamin-D loaded emulsions were formed with olive or coconut oil alone or with added l-α-phosphatidylcholine, as well as two MM based systems. Particle size throughout digestion, fatty acid release, and vitamin-D bioaccessibility were measured. After digestion, particles in the MM size range (∼6-10 nm) were observed for emulsions but not for MM based systems. The bioaccessibility of vitamin-D in olive and coconut emulsions was 75% and 78%, respectively, and ∼ 90% with added l-α-phosphatidylcholine. Bioaccessibility for the MM alone was 93% and 90% when mixed with a protein/lactose base. Overall, MM show good potential as a delivery system for vitamin-D in vitro.
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Affiliation(s)
- Steven L Mulrooney
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Graham J O'Neill
- School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland.
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Dolores O'Riordan
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
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14
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Davis JL, Kennedy C, Clerkin S, Treacy NJ, Dodd T, Moss C, Murphy A, Brazil DP, Cagney G, Brougham DF, Murad R, Finlay D, Vuori K, Crean J. Single-cell multiomics reveals the complexity of TGFβ signalling to chromatin in iPSC-derived kidney organoids. Commun Biol 2022; 5:1301. [PMID: 36435939 PMCID: PMC9701233 DOI: 10.1038/s42003-022-04264-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 11/11/2022] [Indexed: 11/28/2022] Open
Abstract
TGFβ1 plays a regulatory role in the determination of renal cell fate and the progression of renal fibrosis. Here we show an association between SMAD3 and the histone methyltransferase, EZH2, during cell differentiation; ChIP-seq revealed that SMAD3 and EZH2 co-occupy the genome in iPSCs and in iPSC-derived nephron progenitors. Through integration of single cell gene expression and epigenome profiling, we identified de novo ACTA2+ve/POSTN+ve myofibroblasts in kidney organoids treated with TGFβ1, characterised by increased SMAD3-dependent cis chromatin accessibility and gene expression associated with fibroblast activation. We have identified fibrosis-associated regulons characterised by enrichment of SMAD3, AP1, the ETS family of transcription factors, and NUAK1, CREB3L1, and RARG, corresponding to enriched motifs at accessible loci identified by scATACseq. Treatment with the EZH2 specific inhibitor GSK343, blocked SMAD3-dependent cis co-accessibility and inhibited myofibroblast activation. This mechanism, through which TGFβ signals directly to chromatin, represents a critical determinant of fibrotic, differentiated states.
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Affiliation(s)
- Jessica L. Davis
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Ciaran Kennedy
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Shane Clerkin
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Niall J. Treacy
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Thomas Dodd
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Catherine Moss
- grid.7886.10000 0001 0768 2743UCD Genomics Core Facility, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Alison Murphy
- grid.7886.10000 0001 0768 2743UCD Genomics Core Facility, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Derek P. Brazil
- grid.4777.30000 0004 0374 7521Wellcome-Wolfson Institute for Experimental Medicine, Queen’s University Belfast, BT9 7BL Northern Ireland, UK
| | - Gerard Cagney
- grid.7886.10000 0001 0768 2743UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Dermot F. Brougham
- grid.7886.10000 0001 0768 2743UCD School of Chemistry, University College Dublin, Belfield, Dublin, 4 Ireland
| | - Rabi Murad
- grid.479509.60000 0001 0163 8573Sanford Burnham Prebys Institute for Medical Discovery, La Jolla, CA 92037 USA
| | - Darren Finlay
- grid.479509.60000 0001 0163 8573Sanford Burnham Prebys Institute for Medical Discovery, La Jolla, CA 92037 USA
| | - Kristiina Vuori
- grid.479509.60000 0001 0163 8573Sanford Burnham Prebys Institute for Medical Discovery, La Jolla, CA 92037 USA
| | - John Crean
- UCD School of Biomolecular and Biomedical Science, UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin, 4, Ireland.
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15
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Howard J, Wynne K, Moldenhauer E, Clarke P, Maguire C, Bollard S, Yin X, Brennan L, Mooney L, Fitzsimons S, Halasz M, Aluri ER, Brougham DF, Kolch W, Dwyer RM, Potter S, Kelly P, McCann A. A comparative analysis of extracellular vesicles (EVs) from human and feline plasma. Sci Rep 2022; 12:10851. [PMID: 35761023 PMCID: PMC9237114 DOI: 10.1038/s41598-022-14211-z] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 06/02/2022] [Indexed: 11/30/2022] Open
Abstract
Extracellular vesicles (EVs) are nanoparticles found in all biological fluids, capable of transporting biological material around the body. Extensive research into the physiological role of EVs has led to the development of the Minimal Information for Studies of Extracellular Vesicles (MISEV) framework in 2018. This framework guides the standardisation of protocols in the EV field. To date, the focus has been on EVs of human origin. As comparative medicine progresses, there has been a drive to study similarities between diseases in humans and animals. To successfully research EVs in felines, we must validate the application of the MISEV guidelines in this group. EVs were isolated from the plasma of healthy humans and felines. EV characterisation was carried out according to the MISEV guidelines. Human and feline plasma showed a similar concentration of EVs, comparable expression of known EV markers and analogous particle to protein ratios. Mass spectrometry analyses showed that the proteomic signature of EVs from humans and felines were similar. Asymmetrical flow field flow fractionation, showed two distinct subpopulations of EVs isolated from human plasma, whereas only one subpopulation was isolated from feline plasma. Metabolomic profiling showed similar profiles for humans and felines. In conclusion, isolation, and characterisation of EVs from humans and felines show that MISEV2018 guidelines may also be applied to felines. Potential comparative medicine studies of EVs may provide a model for studying naturally occurring diseases in both humans and felines.
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Affiliation(s)
- Jane Howard
- UCD School of Medicine, College of Health and Agricultural Sciences, University College Dublin, Belfield, Dublin 4, Ireland. .,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Kieran Wynne
- UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.,Systems Biology Ireland, University College Dublin, Belfield, Dublin 4, Ireland
| | | | - Paul Clarke
- Postnova Analytics UK Ltd, Malvern Hills Science Park, Malvern, WR14 3SZ, Worcestershire, UK
| | - Ciaran Maguire
- Particular Sciences Ltd, Unit 2 Birch House, Rosemount Business Park, Ballycoolin, Dublin 11, Ireland
| | - Stephanie Bollard
- UCD School of Medicine, College of Health and Agricultural Sciences, University College Dublin, Belfield, Dublin 4, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.,Department of Plastic & Reconstructive Surgery, Mater Misericordiae University Hospital, Dublin 7, Ireland
| | - Xiaofei Yin
- UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Lorraine Brennan
- UCD School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Louise Mooney
- College of Health and Agricultural Sciences, UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Stephen Fitzsimons
- Diabetes Complications Research Centre, School of Biomolecular and Biomedical Sciences, UCD Conway Institute, Belfield, Dublin 4, Ireland
| | - Melinda Halasz
- UCD School of Medicine, College of Health and Agricultural Sciences, University College Dublin, Belfield, Dublin 4, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.,Systems Biology Ireland, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ester Rani Aluri
- UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Walter Kolch
- Systems Biology Ireland, University College Dublin, Belfield, Dublin 4, Ireland
| | - Róisín M Dwyer
- Discipline of Surgery, Lambe Institute for Translational Research, National University of Ireland Galway, Galway, H91 V4AY, Ireland
| | - Shirley Potter
- UCD School of Medicine, College of Health and Agricultural Sciences, University College Dublin, Belfield, Dublin 4, Ireland.,Department of Plastic & Reconstructive Surgery, Mater Misericordiae University Hospital, Dublin 7, Ireland
| | - Pamela Kelly
- College of Health and Agricultural Sciences, UCD School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland
| | - Amanda McCann
- UCD School of Medicine, College of Health and Agricultural Sciences, University College Dublin, Belfield, Dublin 4, Ireland.,UCD Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
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16
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Clerkin S, Wychowaniec JK, Singh K, Davis JL, Treacy NJ, Krupa I, Brougham DF, Crean J. Gelatin Methacryloyl (GelMA) as a Suitable Three‐Dimensional Extracellular Environment for the Derivation of hiPSC‐Derived Kidney Organoids. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r3064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Shane Clerkin
- UCD Conway Institute of Biomolecular and Biomedical ResearchDublin
| | | | | | - Jessica L. Davis
- UCD Conway Institute of Biomolecular and Biomedical ResearchDublin
| | - Niall J. Treacy
- UCD Conway Institute of Biomolecular and Biomedical ResearchDublin
| | - Ivan Krupa
- UCD Conway Institute of Biomolecular and Biomedical ResearchDublin
| | | | - John Crean
- UCD Conway Institute of Biomolecular and Biomedical ResearchDublin
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17
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Treacy NJ, Clerkin S, Davis JL, Kennedy C, Wychowaniec JK, Brougham DF, Crean J. Growth and differentiation of human induced pluripotent stem cell (hiPSC) derived kidney organoids using fully synthetic peptide hydrogels. FASEB J 2022. [DOI: 10.1096/fasebj.2022.36.s1.r5108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Shane Clerkin
- UCD School of Biomolecular and Biomedical ScienceDublin
| | | | | | | | | | - John Crean
- UCD School of Biomolecular and Biomedical ScienceDublin
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18
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Rani Aluri E, Gannon E, Singh K, Kolagatla S, Kowiorski K, Shingte S, McKiernan E, Moloney C, McGarry K, Jowett L, Rodriguez BJ, Brougham DF, Wychowaniec JK. Graphene oxide modulates inter-particle interactions in 3D printable soft nanocomposite hydrogels restoring magnetic hyperthermia responses. J Colloid Interface Sci 2021; 611:533-544. [PMID: 34971964 DOI: 10.1016/j.jcis.2021.12.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 11/25/2021] [Accepted: 12/07/2021] [Indexed: 01/26/2023]
Abstract
Hydrogels loaded with magnetic iron oxide nanoparticles that can be patterned and which controllably induce hyperthermic responses on AC-field stimulation are of interest as functional components of next-generation biomaterials. Formation of nanocomposite hydrogels is known to eliminate any Brownian contribution to hyperthermic response (reducing stimulated heating) while the Néel contribution can also be suppressed by inter-particle dipolar interactions arising from aggregation induced before or during gelation. We describe the ability of graphene oxide (GO) flakes to restore the hyperthermic efficiency of soft printable hydrogels formed using Pluronics F127 and PEGylated magnetic nanoflowers. Here, by varying the amount of GO in mixed nanocomposite suspensions and gels, we demonstrate GO-content dependent recovery of hyperthemic response in gels. This is due to progressively reduced inter-nanoflower interactions mediated by GO, which largely restore the dispersed-state Néel contribution to heating. We suggest that preferential association of GO with the hydrophobic F127 blocks increases the preponderance of cohesive interactions between the hydrophilic blocks and the PEGylated nanoflowers, promoting dispersion of the latter. Finally we demonstrate extrusion-based 3D printing with excellent print fidelity of the magnetically-responsive nanocomposites, for which the inclusion of GO provides significant improvement in the spatially-localized open-coil heating response, rendering the prints viable components for future cell stimulation and delivery applications.
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Affiliation(s)
- Esther Rani Aluri
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Edward Gannon
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Krutika Singh
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Srikanth Kolagatla
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland; School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Krystian Kowiorski
- Łukasiewicz Research Network - Institute of Microelectronics and Photonics, Research Group - Functional Materials, Lotników 32/46, 02-668 Warsaw, Poland
| | - Sameer Shingte
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eoin McKiernan
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Cara Moloney
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Katie McGarry
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Liam Jowett
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brian J Rodriguez
- Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland; School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Jacek K Wychowaniec
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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19
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Walsh CM, Wychowaniec JK, Brougham DF, Dooley D. Functional hydrogels as therapeutic tools for spinal cord injury: New perspectives on immunopharmacological interventions. Pharmacol Ther 2021; 234:108043. [PMID: 34813862 DOI: 10.1016/j.pharmthera.2021.108043] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/10/2021] [Accepted: 11/11/2021] [Indexed: 02/06/2023]
Abstract
Spinal cord injury (SCI) is a complex medical and psychological challenge for which there is no curative therapy currently available. Despite major progress in pharmacological and surgical approaches, clinical trials for SCI patients have been uniformly disappointing thus far as there are many practical and biological issues yet to be resolved. Neuroinflammation is a critical event of the secondary injury phase after SCI, and recent research strategies have focused on modulating the immune response after injury to provide a more favorable recovery environment. Biomaterials can serve this purpose by providing physical and trophic support to the injured spinal cord after SCI. Of all potential biomaterials, functional hydrogels are emerging as a key component in novel treatment strategies for SCI, including controlled and localized delivery of immunomodulatory therapies to drive polarization of immune cells towards a pro-regenerative phenotype. Here, we extensively review recent developments in the use of functional hydrogels as immunomodulatory therapies for SCI. We briefly describe physicochemical properties of hydrogels and demonstrate how advanced fabrication methods lead to the required heterogeneity and hierarchical arrangements that increasingly mimic complex spinal cord tissue. We then summarize potential SCI therapeutic modalities including: (i) hydrogels alone; (ii) hydrogels as cellular or (iii) bioactive molecule delivery vehicles, and; (iv) combinatorial approaches. By linking the structural properties of hydrogels to their functions in treatment with particular focus on immunopharmacological stimuli, this may accelerate further development of functional hydrogels for SCI, and indeed next-generation central nervous system regenerative therapies.
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Affiliation(s)
- Ciara M Walsh
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland; UCD Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland
| | - Jacek K Wychowaniec
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland; AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dearbhaile Dooley
- School of Medicine, Health Sciences Centre, University College Dublin, Belfield, Dublin 4, Ireland; UCD Conway Institute of Biomolecular & Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.
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20
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Mulrooney SL, O'Neill GJ, Brougham DF, Lyng JG, O'Riordan D. Improving vitamin D 3 stability to environmental and processing stresses using mixed micelles. Food Chem 2021; 362:130114. [PMID: 34087708 DOI: 10.1016/j.foodchem.2021.130114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 05/04/2021] [Accepted: 05/12/2021] [Indexed: 10/21/2022]
Abstract
Deficiency of vitamin-D is prevalent globally and can lead to negative health consequences. The fat-soluble nature of vitamin-D, coupled with its sensitivity to heat, light and oxygen limits its incorporation into foods. Mixed micelles (MM) have potential to enhance bioavailability of vitamin-D. This study explores the stability of MM to food processing regimes and their ability to protect vitamin-D. Subjecting MM to a range of shearing speeds (8,000-20,500 rpm) and to high pressure processing (600 MPa, 120sec) resulted in no change in MM size (4.1-4.5 nm). MM improved the retention of vitamin-D following exposure to UV-C light, near UV/visible light, and heat treatment. MM suspensions protected vitamin-D over a four week storage period at refrigeration or freezer conditions. Overall MM show potential to protect vitamin-D from degradation encountered in food processing and storage and may be beneficial as a mechanism to fortify foods with vitamin-D.
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Affiliation(s)
- Steven L Mulrooney
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Graham J O'Neill
- School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland.
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - James G Lyng
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Dolores O'Riordan
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
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21
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Hristov DR, Lopez H, Ortin Y, O'Sullivan K, Dawson KA, Brougham DF. Impact of dynamic sub-populations within grafted chains on the protein binding and colloidal stability of PEGylated nanoparticles. Nanoscale 2021; 13:5344-5355. [PMID: 33660726 DOI: 10.1039/d0nr08294e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Polyethylene glycol grafting has played a central role in preparing the surfaces of nano-probes for biological interaction, to extend blood circulation times and to modulate protein recognition and cellular uptake. However, the role of PEG graft dynamics and conformation in determining surface recognition processes is poorly understood primarily due to the absence of a microscopic picture of the surface presentation of the polymer. Here a detailed NMR analysis reveals three types of dynamic ethylene glycol units on PEG-grafted SiO2 nanoparticles (NPs) of the type commonly evaluated as long-circulating theranostic nano-probes; a narrow fraction with fast dynamics associated with the chain ends; a broadened fraction spectrally overlapped with the former arising from those parts of the chain experiencing some dynamic restriction; and a fraction too broad to be observed in the spectrum arising from units closer to the surface/graft which undergo slow motion on the NMR timescale. We demonstrate that ethylene glycol units transition between fractions as a function of temperature, core size, PEG chain length and surface coverage and demonstrate how this distribution affects colloidal stability and protein uptake. The implications of the findings for biological application of grafted nanoparticles are discussed in the context of accepted models for surface ligand conformation.
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Affiliation(s)
- Delyan R Hristov
- Centre for BioNano Interactions, School of Chemistry, University College Dublin, Dublin, Republic of Ireland
| | - Hender Lopez
- School of Physics & Optometric & Clinical Sciences, Technological University Dublin, City Campus, Kevin Street, Dublin 8, Republic of Ireland
| | - Yannick Ortin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Republic of Ireland.
| | - Kate O'Sullivan
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Republic of Ireland.
| | - Kenneth A Dawson
- Centre for BioNano Interactions, School of Chemistry, University College Dublin, Dublin, Republic of Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Republic of Ireland.
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22
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Wu B, Wiseman ME, Seitz ME, Tomić K, Heise A, Brougham DF, Litvinov VM. Impact of morphology on O2 permeability in silicone hydrogel membranes: new insights into domain percolation from experiments and simulations. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118970] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Monks P, Wychowaniec JK, McKiernan E, Clerkin S, Crean J, Rodriguez BJ, Reynaud EG, Heise A, Brougham DF. Spatiotemporally Resolved Heat Dissipation in 3D Patterned Magnetically Responsive Hydrogels. Small 2021; 17:e2004452. [PMID: 33369876 DOI: 10.1002/smll.202004452] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 11/13/2020] [Indexed: 05/27/2023]
Abstract
Multifunctional nanocomposites that exhibit well-defined physical properties and encode spatiotemporally controlled responses are emerging as components for advanced responsive systems, for example, in soft robotics or drug delivery. Here an example of such a system, based on simple magnetic hydrogels composed of iron oxide magnetic nanoflowers and Pluronic F127 that generates heat upon alternating magnetic field irradiation is described. Rules for heat-induction in bulk hydrogels and the heat-dependence on particle concentration, gel volume, and gel exposed surface area are established, and the dependence on external environmental conditions in "closed" as compared to "open" (cell culture) system, with controllable heat jumps, of ∆T 0-12°C, achieved within ≤10 min and maintained described. Furthermore the use of extrusion-based 3D printing for manipulating the spatial distribution of heat in well-defined printed features with spatial resolution <150 µm, sufficiently fine to be of relevance to tissue engineering, is presented. Finally, localized heat induction in printed magnetic hydrogels is demonstrated through spatiotemporally-controlled release of molecules (in this case the dye methylene blue). The study establishes hitherto unobserved control over combined spatial and temporal induction of heat, the applications of which in developing responsive scaffold remodeling and cargo release for applications in regenerative medicine are discussed.
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Affiliation(s)
- Patricia Monks
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
- Department of Chemistry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | | | - Eoin McKiernan
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Shane Clerkin
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - John Crean
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brian J Rodriguez
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
- School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
| | - Emmanuel G Reynaud
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Andreas Heise
- Department of Chemistry, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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24
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Lyons S, Mc Kiernan EP, Dee G, Brougham DF, Morrin A. Correction: Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks. Nanoscale 2021; 13:1365-1366. [PMID: 33406175 DOI: 10.1039/d0nr90262d] [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: 06/12/2023]
Abstract
Correction for 'Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks' by Stephen Lyons et al., Nanoscale, 2020, 12, 10550-10558, DOI: 10.1039/D0NR01602K.
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Affiliation(s)
- Stephen Lyons
- Insight SFI Research Centre For Data Analytics, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Ireland.
| | | | - Garret Dee
- School of Chemistry, Trinity College Dublin, Ireland
| | | | - Aoife Morrin
- Insight SFI Research Centre For Data Analytics, National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Ireland.
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25
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Morais E, Moloney C, O'Modhrain C, McKiernan E, Brougham DF, Sullivan JA. Enhanced Stability and Emission Properties of Perylene Dyes by Surface Tethering: Preparation of Fluorescent Ru Nanoparticle Suspensions by Alkyne Linker Chemistry. Chemistry 2021; 27:1023-1030. [PMID: 33022835 DOI: 10.1002/chem.202003514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 09/25/2020] [Indexed: 11/06/2022]
Abstract
Spherical ruthenium nanoparticles (NPs) with a narrow size distribution were synthesised in ethanol by a facile low-temperature solvothermal process without the assistance of templates, structure-directing agents or post annealing/reduction treatments. Surface passivation with a fluorescent perylene dye (EP), and with silane ligands (ETMS), both initially bearing alkyne groups and subsequently forming vinylidene linkages, provided stable suspensions of the marginally soluble free EP. Quantitative analysis of the suspension gave an estimated EP surface coverage of 15 %, corresponding to an EP/ETMS mole ratio of ≈1:6. Photophysical evaluation of the bound and free dye revealed similar absorption bands and extinction coefficients and improved properties for the bound state, including enhanced fluorescence in the visible range for the bound dye, an extended absorption range into the near-UV providing strong emission in the visible, and significantly improved photostability. The physical basis of the enhanced photophysical properties, potential routes to further improvements and the implications for applications are discussed.
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Affiliation(s)
| | - Cara Moloney
- UCD School of Chemistry, Belfield, Dublin, 4, Ireland
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26
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Mulrooney SL, O'Neill GJ, Brougham DF, O'Riordan D. Vitamin D 3 bioaccessibility: Influence of fatty acid chain length, salt concentration and l-α-phosphatidylcholine concentration on mixed micelle formation and delivery of vitamin D 3. Food Chem 2020; 344:128722. [PMID: 33277128 DOI: 10.1016/j.foodchem.2020.128722] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/17/2020] [Accepted: 11/20/2020] [Indexed: 10/22/2022]
Abstract
Vitamin D (VD) is a fat-soluble vitamin with high deficiency levels evident globally. Bioaccessibility of VD is influenced by formation of mixed micelles (MM) during digestion. This study assessed the impact of fatty acid (FA) type, phospholipid concentration on MM formation and stability of MM to salts. MM formation occurred at NaCl and KCl concentrations ranging from 20 to 100 mM, when octanoic acid (C8) or stearic acid (C18) were used. MM hydrodynamic size increased with increasing l-α-phosphatidylcholine concentration (1.5-7.5 mM) for both C8 and C18, above which concentration MM did not form. FA chain length impacted MM with hydrodynamic size increasing from 3.8 nm for decanoic acid (C10) to 4.4 nm for C18. VD3 incorporation in MM was not influenced by the FA used (C10 or C18). Understanding stability and formation of MM and VD3 loading is an essential first step towards manipulating food structures for improving delivery of VD.
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Affiliation(s)
- Steven L Mulrooney
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Graham J O'Neill
- School of Food Science and Environmental Health, Technological University Dublin, Dublin 1, Ireland.
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Dolores O'Riordan
- Institute of Food and Health, University College Dublin, Belfield, Dublin 4, Ireland.
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27
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Wu B, Chassé W, Zick K, Mantle MD, Heise A, Brougham DF, Litvinov VM. The effect of hydrogen bonding on diffusion and permeability in UV-cured Polyacrylate-based networks for controlled release. J Control Release 2020; 327:150-160. [PMID: 32738286 DOI: 10.1016/j.jconrel.2020.07.039] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 07/21/2020] [Accepted: 07/22/2020] [Indexed: 02/03/2023]
Abstract
Polyacrylates are important polymers widely used in pharmaceutical industry such as drug coatings due to their low cost, processability and ease of functionalisation. Chemical functionalities (e.g. H-bonding) can be easily included to modulate the transport of low molecular weight drug-like entities through the network. Understanding how such microscopic structural modifications determine macroscopic diffusion is critical for designing next generation responsive polymers. In this study pulsed field gradient (PFG) 1H NMR measurements of the self-diffusion of a dye molecule (Eosin Y) in a series of polyacrylate networks with differing H-bonding strength were undertaken; it was found that the diffusion of Eosin Y is significantly reduced in networks with H-bonding. Detailed analyses by 1H NMR relaxometry and double quantum (DQ) NMR show that H-bonding can also reduce polymer chain mobility. Furthermore, DSC thermoporometry showed a significant increase in the average network mesh size potentially due to the pre-organization of H-bonding containing monomer during network curing. By introducing the H-bonding disrupter, LiClO4, it was found that the diffusivity of solute becomes positively correlated to the average mesh size across the series of networks. Hence, a modified diffusion model based on hydrodynamic theory is proposed to separate the direct (solute-network) H-bonding contribution to solute diffusion from the indirect contribution arising from monomer pre-ordering induced mesh size reduction. Finally, it is shown that the same direct and indirect contributions to microscopic diffusivity, arising from the H-bond strength of the co-monomers, also contribute significantly to the macroscopic membrane permeability which is similarly subject to H-bond disruption.
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Affiliation(s)
- Bing Wu
- National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland; School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland; Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland.
| | - Walter Chassé
- Institut für Physikalishe Chemie, Universtiy of Münster, Corrensstr. 28/30, 48149 Münster. Germany
| | - Klaus Zick
- Bruker Biospin GmbH, Silberstreifen 4, 76287 Rheinstetten, Germany
| | - Michael D Mantle
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke Street, Cambridge, UK
| | - Andreas Heise
- Department of Chemistry, Royal College of Surgeons in Ireland, 123 St. Stephen's Green, Dublin 2, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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28
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Lyons S, Mc Kiernan EP, Dee G, Brougham DF, Morrin A. Electrostatically modulated magnetophoretic transport of functionalised iron-oxide nanoparticles through hydrated networks. Nanoscale 2020; 12:10550-10558. [PMID: 32159560 DOI: 10.1039/d0nr01602k] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Factors that determine magnetophoretic transport of magnetic nanoparticles (MNPs) through hydrated polymer networks under the influence of an external magnetic field gradient were studied. Functionalised iron oxide cores (8.9 nm core diameter) were tracked in real-time as they moved through agarose gels under the influence of an inhomogeneous magnetic field. Terminal magnetophoretic velocities were observed in all cases, these were quantified and found to be highly reproducible and sensitive to the conditions. Increasing agarose content reduced magnetophoretic velocity, we attribute this to increasingly tortuous paths through the porous hydrated polymer network and propose a new factor to quantify the tortuosity. The impact of MNP surface functionalisation, charge, network fixed charge content, and ionic strength of the aqueous phase on velocity were studied to separate these effects. For MNPs functionalised with polyethylene glycol (PEG) increasing chain length reduced velocity but the tortuosity extracted, which is a function of the network, was unchanged; validating the approach. For charged citrate- and arginine-functionalised MNPs, magnetophoretic velocities were found to increase for particles with positive and decrease for particles with negative zeta potential. In both cases these effects could be moderated by reducing the number of agarose anionic residues and/or increasing the ionic strength of the aqueous phase; conditions under which tortuosity again becomes the critical factor. A model for MNP transport identifying the contributions from the tortuous pore network and from electrostatic effects associated with the pore constrictions is proposed.
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Affiliation(s)
- Stephen Lyons
- Insight SFI Research Centre For Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Ireland.
| | | | - Garret Dee
- School of Chemistry, Trinity College Dublin, Ireland
| | | | - Aoife Morrin
- Insight SFI Research Centre For Data Analytics; National Centre for Sensor Research; School of Chemical Sciences, Dublin City University, Ireland.
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29
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Molloy JK, Nonat AM, O’Brien JE, Brougham DF, Gunnlaugsson T. Self-assembled Ln(III) cyclen-based micelles and AuNPs conjugates as candidates for luminescent and magnetic resonance imaging (MRI) agents. Supramol Chem 2020. [DOI: 10.1080/10610278.2020.1742912] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Jennifer K. Molloy
- Département de Chimie Moléculaire, Université Grenoble Alpes, Grenoble, France
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Aline M. Nonat
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
- SynPA, IPHC, Université de Strasbourg, ECPM, Strasbourg, France
| | - John E. O’Brien
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Dermot F. Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin, Ireland
| | - Thorfinnur Gunnlaugsson
- School of Chemistry and Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
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30
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Zhan D, Luo W, Kraatz HB, Fehse M, Li Y, Xiao Z, Brougham DF, Simpson AJ, Wu B. Facile Approach for Synthesizing High-Performance MnO/C Electrodes from Rice Husk. ACS Omega 2019; 4:18908-18917. [PMID: 31737852 PMCID: PMC6854825 DOI: 10.1021/acsomega.9b03026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 10/21/2019] [Indexed: 06/10/2023]
Abstract
Pyrolysis is an effective way to convert biomass into biofuel while obtaining highly porous active carbon materials. In this study, a facile approach, involving hydrothermal and pyrolysis steps, is described for preparing hybrid metal oxide nanoparticle-embedded porous hard carbon matrices (MnO/C) from the biowaste rice husk and organometallic precursors. It was found that the pyrolysis/calcination temperature had a strong influence over the microstructure, especially over the porosity, but also over the carbon content and crystallinity of the nanocomposites; hence, the electrical properties can be controlled. Galvanostatic measurements showed that the nanocomposite obtained at 600 °C exhibited the highest charge/discharge capacity and best stability, delivering an initial discharge capacity of 1104 mA·h·g-1 at a current density of 200 mA·g-1, and retaining a value of 830 mA·h·g-1 after 200 cycles, suggesting excellent cycle stability. A discharge capacity of 581 mA·h·g-1 was obtained even at a current density as high as 2400 mA·g-1, demonstrating superb rate capability. This outstanding electrochemical performance, ascribed to high electrochemical activity of the embedded MnO nanoparticles enhanced by electrical conductivity provided through the high surface area of the active porous carbon support, is discussed in relation to the microstructure of the nanocomposite.
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Affiliation(s)
- Dan Zhan
- College
of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, P. R. China
- Hubei
Key Laboratory of Power System Design and Test for Electrical Vehicle, Xiangyang 441053, P. R. China
| | - Wei Luo
- College
of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, P. R. China
| | - Heinz-Bernhard Kraatz
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Marcus Fehse
- Dutch-Belgian
Beamline (DUBBLE), ESRF—The European
Synchrotron Radiation Facility, CS 40220, Grenoble Cedex
9 38043, France
- Faculty
of Applied Sciences, Delft University of
Technology, Mekelweg
5, Delft 2628 CD, the Netherlands
| | - Yuqi Li
- College
of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, P. R. China
| | - Zuoan Xiao
- College
of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, P. R. China
- Hubei
Key Laboratory of Power System Design and Test for Electrical Vehicle, Xiangyang 441053, P. R. China
| | - Dermot F. Brougham
- School of
Chemistry, University College Dublin, Belfield, Dublin 4 D04
V1W8, Ireland
| | - André J. Simpson
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
| | - Bing Wu
- Department
of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto M1C 1A4, Canada
- Dutch-Belgian
Beamline (DUBBLE), ESRF—The European
Synchrotron Radiation Facility, CS 40220, Grenoble Cedex
9 38043, France
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31
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Clarkin OM, Wu B, Cahill PA, Brougham DF, Banerjee D, Brady SA, Fox EK, Lally C. Novel injectable gallium-based self-setting glass-alginate hydrogel composite for cardiovascular tissue engineering. Carbohydr Polym 2019; 217:152-159. [PMID: 31079672 DOI: 10.1016/j.carbpol.2019.04.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 04/01/2019] [Accepted: 04/02/2019] [Indexed: 11/19/2022]
Abstract
Composite biomaterials offer a new approach for engineering novel, minimally-invasive scaffolds with properties that can be modified for a range of soft tissue applications. In this study, a new way of controlling the gelation of alginate hydrogels using Ga-based glass particles is presented. Through a comprehensive analysis, it was shown that the setting time, mechanical strength, stiffness and degradation properties of this composite can all be tailored for various applications. Specifically, the hydrogel generated through using a glass particle, wherein toxic aluminium is replaced with biocompatible gallium, exhibited enhanced properties. The material's stiffness matches that of soft tissues, while it displays a slow and tuneable gelation rate, making it a suitable candidate for minimally-invasive intra-vascular injection. In addition, it was also found that this composite can be tailored to deliver ions into the local cellular environment without affecting platelet adhesion or compromising viability of vascular cells in vitro.
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Affiliation(s)
- Owen M Clarkin
- DCU Biomaterials Research Group, Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland
| | - Bing Wu
- DCU Biomaterials Research Group, Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland; DUBBLE Beamline, European Synchrotron Radiation Facility (ESRF), 71 avenue des Martyrs, CS 40220, Grenoble, 38043, France; School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Paul A Cahill
- Vascular Biology and Therapeutic Laboratory, School of Biotechnology, Faculty of Science and Health, Dublin City University, Dublin 9, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dipanjan Banerjee
- DUBBLE Beamline, European Synchrotron Radiation Facility (ESRF), 71 avenue des Martyrs, CS 40220, Grenoble, 38043, France; Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Sarah A Brady
- DCU Biomaterials Research Group, Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland
| | - Eoin K Fox
- DCU Biomaterials Research Group, Centre for Medical Engineering Research, School of Mechanical and Manufacturing Engineering, Dublin City University, Dublin 9, Ireland
| | - Caitríona Lally
- Department of Mechanical and Manufacturing Engineering, School of Engineering and Trinity Centre for Bioengineering, Trinity College Dublin, Dublin 2, Ireland
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32
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Fox EK, El Haddassi F, Hierrezuelo J, Ninjbadgar T, Stolarczyk JK, Merlin J, Brougham DF. Size-Controlled Nanoparticle Clusters of Narrow Size-Polydispersity Formed Using Multiple Particle Types Through Competitive Stabilizer Desorption to a Liquid-Liquid Interface. Small 2018; 14:e1802278. [PMID: 30589504 DOI: 10.1002/smll.201802278] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/11/2018] [Indexed: 06/09/2023]
Abstract
A novel colloidal approach is presented for preparing fully dispersed nanoparticle (NP) assemblies (clusters) of narrow size-polydispersity over a wide range of sizes through irreversible depletion of stabilizing ligands onto a liquid-liquid interface. Unusually, the relative monodispersity of the assemblies continuously improves throughout the process. A detailed kinetics study into the assembly of iron oxide NP clusters shows that the assembly rate decreases with NP concentration, pinpointing the role of the interface in size focusing. A new protocol for identifying initial conditions that enable controlled assembly is described, which allows extension of the approach to multiple NP types, opening up a general route to colloidally processed materials. The process uses cheap materials, it is reproducible, robust, and scaleable, and it allows for selection of both particle and cluster size. In the case of assemblies of magnetic iron oxide NPs, these advantages enable tuning of the magnetic properties of the assemblies for applications such as magnetically targetable MRI-trackable agents in biomedicine.
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Affiliation(s)
- Eoin K Fox
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Fadwa El Haddassi
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Jose Hierrezuelo
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
| | - Tsedev Ninjbadgar
- Faculty of Engineering, Shine Mongol Institute of Technology, Ulaanbaatar, 13372, Mongolia
| | - Jacek K Stolarczyk
- Photonics and Optoelectronics Group, Department of Physics and Center for Nanoscience (CeNS), Ludwig-Maximilians-Universität München, Amalienstaße 54, 80799, Munich, Germany
- Nanosystems Initiative Munich (NIM), Schellingstraße 4, 80799, Munich, Germany
| | - Jenny Merlin
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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33
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Stolarczyk JK, Meledandri CJ, Clarke SP, Brougham DF. Size selectable nanoparticle assemblies with magnetic anisotropy tunable across the superparamagnetic to ferromagnetic range. Chem Commun (Camb) 2018; 52:13337-13340. [PMID: 27709207 DOI: 10.1039/c6cc05871j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We present a novel approach for the preparation of magnetic nanoparticle clusters of controlled size and selectable magnetic anisotropy, which provides materials with properties selectable for biomedical applications and as components in magnetically responsive nanocomposites. The assembly process is based on a ligand desorption strategy and allows selection of nanoparticle size and temporal control over final cluster size. Detailed NMR analysis of the suspensions pinpoints the role of particle size in controlling the interparticle interactions, within the clusters, which effectively determine the anisotropy. Colloidal interaction modelling confirms this interpretation and provides a means to predict both colloidal stability and magnetic anisotropy.
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Affiliation(s)
- Jacek K Stolarczyk
- Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799 Munich, Germany and Nanosystems Initiative Munich (NIM), Schellingstr. 4, 80799 Munich, Germany
| | - Carla J Meledandri
- Department of Chemistry and MacDiarmid Institute for Advanced Materials and Nanotechnology, University of Otago, Dunedin, New Zealand
| | - Sarah P Clarke
- National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City University, Dublin 9, Ireland
| | - Dermot F Brougham
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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34
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Stukenkemper T, Paquez X, Verhoeven MWGM, Hensen EJM, Dias AA, Brougham DF, Heise A. Polypeptide Polymer Brushes by Light-Induced Surface Polymerization of Amino Acid N
-Carboxyanhydrides. Macromol Rapid Commun 2018; 39:e1700743. [DOI: 10.1002/marc.201700743] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 12/08/2017] [Indexed: 01/03/2023]
Affiliation(s)
- Timo Stukenkemper
- School of Chemical Sciences; Dublin City University; Glasnevin, Dublin 9 Ireland
| | | | - M. W. G. M. Verhoeven
- Laboratory of Inorganic Materials Chemistry; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven the Netherlands
| | - Emiel J. M. Hensen
- Laboratory of Inorganic Materials Chemistry; Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; P.O. Box 513 5600 MB Eindhoven the Netherlands
| | | | - Dermot F. Brougham
- School of Chemistry; University College Dublin; Belfield, Dublin 4 Ireland
| | - Andreas Heise
- Department of Pharmaceutical and Medicinal Chemistry; Royal College of Surgeons in Ireland; 123 St. Stephens Green Dublin 2 Ireland
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35
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Wu B, Chassé W, Peters R, Brooijmans T, Dias AA, Heise A, Duxbury CJ, Kentgens APM, Brougham DF, Litvinov VM. Network Structure in Acrylate Systems: Effect of Junction Topology on Cross-Link Density and Macroscopic Gel Properties. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01070] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Bing Wu
- National
Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
- DSM Ahead Materials Sciences R&D, Urmonderbaan 22, 6167 RD Geleen, The Netherlands
- DSM Resolve, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | - Walter Chassé
- Institute
for Molecules and Materials, Radboud University Nijmegen, Heyendaalsweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Ron Peters
- DSM Coating
Resins, Sluisweg 12, 5145
PE, Waalwijk, The Netherlands
- Analytical-Chemistry
Group, Van’t Hoff Institute for Molecular Science, University of Amsterdam, Amsterdam, The Netherlands
| | - Ton Brooijmans
- DSM Coating
Resins, Sluisweg 12, 5145
PE, Waalwijk, The Netherlands
| | - Aylvin A. Dias
- DSM Ahead Materials Sciences R&D, Urmonderbaan 22, 6167 RD Geleen, The Netherlands
| | - Andreas Heise
- School
of
Pharmacy, Royal College of Surgeons in Ireland, 123 St. Stephen’s Green, Dublin 2, Ireland
| | | | - Arno P. M. Kentgens
- Institute
for Molecules and Materials, Radboud University Nijmegen, Heyendaalsweg
135, 6525 AJ Nijmegen, The Netherlands
| | - Dermot F. Brougham
- School
of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Victor M. Litvinov
- Institute
for Molecules and Materials, Radboud University Nijmegen, Heyendaalsweg
135, 6525 AJ Nijmegen, The Netherlands
- DSM Resolve, P.O. Box 18, 6160 MD Geleen, The Netherlands
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36
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Surender EM, Comby S, Martyn S, Cavanagh B, Lee TC, Brougham DF, Gunnlaugsson T. Cyclen lanthanide-based micellar structures for application as luminescent [Eu(iii)] and magnetic [Gd(iii)] resonance imaging (MRI) contrast agents. Chem Commun (Camb) 2016; 52:10858-61. [PMID: 27523566 DOI: 10.1039/c6cc03092k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of coordinatively unsaturated tetra-substituted 1,4,7,10-tetraazacyclododecane (cyclen) lanthanide complexes is described; these structures, possessing hydrophobic (C12-alkyl) tails and hydrophilic head groups, self-assemble into supramolecular micellar structures in aqueous solution, and hence can be utilised as novel contrast agents for MRI.
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Affiliation(s)
- Esther M Surender
- School of Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin 2, Ireland.
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37
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Stolarczyk JK, Deak A, Brougham DF. Nanoparticle Assemblies: Nanoparticle Clusters: Assembly and Control Over Internal Order, Current Capabilities, and Future Potential (Adv. Mater. 27/2016). Adv Mater 2016; 28:5764. [PMID: 27411645 DOI: 10.1002/adma.201670190] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Clusters or assemblies of nanoparticles exhibit unique features which arise from the enhancement of properties of single nanoparticles or due to new collective properties. On page 5400, D. F. Brougham and co-workers review the role of nanoparticle interactions in controlling cluster formation, and classify the assembly mechanisms. Emerging applications for surface-enhanced Raman scattering (SERS), optical labeling, light harvesting, magnetic resonance imaging (MRI), hyperthermia, photocatalysis, enrichment, and separation are presented. Cover image by Christoph Hohmann, Nanosystems Initiative Munich (NIM).
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Affiliation(s)
- Jacek K Stolarczyk
- Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799, Munich, Germany
- Nanosystems Initiative Munich (NIM), Schellingstrasse 4, Munich, 80799, Germany
| | - Andras Deak
- Institute for Technical Physics and Materials Science, HAS Centre for Energy Research, P.O. Box 49, H-1525, Budapest, Hungary
| | - Dermot F Brougham
- National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City, Glasnevin, Dublin 9, Ireland
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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38
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Stolarczyk JK, Deak A, Brougham DF. Nanoparticle Clusters: Assembly and Control Over Internal Order, Current Capabilities, and Future Potential. Adv Mater 2016; 28:5400-24. [PMID: 27411644 DOI: 10.1002/adma.201505350] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/08/2016] [Indexed: 05/18/2023]
Abstract
The current state of the art in the use of colloidal methods to form nanoparticle assemblies, or clusters (NPCs) is reviewed. The focus is on the two-step approach, which exploits the advantages of bottom-up wet chemical NP synthesis procedures, with subsequent colloidal destabilization to trigger assembly in a controlled manner. Recent successes in the application of functional NPCs with enhanced emergent collective properties for a wide range of applications, including in biomedical detection, surface enhanced Raman scattering (SERS) enhancement, photocatalysis, and light harvesting, are highlighted. The role of the NP-NP interactions in the formation of monodisperse ordered clusters is described and the different assembly processes from a wide range of literature sources are classified according to the nature of the perturbation from the initial equilibrium state (dispersed NPs). Finally, the future for the field and the anticipated role of computational approaches in developing next-generation functional NPCs are briefly discussed.
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Affiliation(s)
- Jacek K Stolarczyk
- Photonics and Optoelectronics Group, Department of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Amalienstrasse 54, 80799, Munich, Germany
- Nanosystems Initiative Munich (NIM), Schellingstrasse 4, Munich, 80799, Germany
| | - Andras Deak
- Institute for Technical Physics and Materials Science, HAS Centre for Energy Research, P.O. Box 49, H-1525, Budapest, Hungary
| | - Dermot F Brougham
- National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City, Glasnevin, Dublin 9, Ireland
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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39
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Bagga K, Brougham DF, Keyes TE, Brabazon D. Magnetic and noble metal nanocomposites for separation and optical detection of biological species. Phys Chem Chem Phys 2015; 17:27968-80. [PMID: 26024367 DOI: 10.1039/c5cp01219h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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
Nanoalloys and nanocomposites are widely studied classes of nanomaterials within the context of biological systems. They are of immense interest because of the possibility of tuning the optical, magnetic, electronic and chemical properties through particle composition and internal architecture. In principle these properties can therefore be optimized for application in biological detections such as of DNA sequences, bacteria, viruses, antibodies, antigens, and cancer cells. This article presents an overview of methods currently used for nanoalloy and nanocomposite synthesis and characterisation, focusing on Au-Ag and FexOy@Au structures as primary components in detection platforms for plasmonic and magnetically enabled plasmonic bio-sensing.
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Affiliation(s)
- K Bagga
- Advanced Processing Technology Research Centre, Dublin City University, Ireland.
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40
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Sreeremya TS, Krishnan A, Remani KC, Patil KR, Brougham DF, Ghosh S. Shape-selective oriented cerium oxide nanocrystals permit assessment of the effect of the exposed facets on catalytic activity and oxygen storage capacity. ACS Appl Mater Interfaces 2015; 7:8545-8555. [PMID: 25831073 DOI: 10.1021/acsami.5b00298] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The catalytic performance of a range of nanocrystalline CeO2 samples, prepared to have different morphologies, was measured using two accepted indicators; oxygen storage and diesel soot combustion. The same powders were characterized in detail by HR-TEM, XRD, XPS, and Raman methods. The study demonstrates that activity is determined by the relative fraction of the active crystallographic planes, not by the specific surface area of the powders. The physical study is a step toward quantitative evaluation of the relative contribution to activity of the different facets. The synthetic protocol permits fabrication of CeO2 nanostructures with preferentially grown active planes, and therefore has potential in developing catalytic applications and in nanocompositing.
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Affiliation(s)
| | | | | | | | - Dermot F Brougham
- §National Institute for Cellular Biotechnology, School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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41
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Ninjbadgar T, Fox EK, Hierrezuelo J, El Haddassi F, Brougham DF. Monodisperse magnetic nanoparticle assemblies prepared at scale by competitive stabiliser desorption. J Mater Chem B 2015; 3:8638-8643. [DOI: 10.1039/c5tb01573a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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
We report a scalable and reproducible method to assemble magnetic nanoparticle clusters from oleic acid stabilised iron oxide nanoparticles.
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Affiliation(s)
- Tsedev Ninjbadgar
- National Institute for Cellular Biotechnology
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Eoin K. Fox
- National Institute for Cellular Biotechnology
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Jose Hierrezuelo
- National Institute for Cellular Biotechnology
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Fadwa El Haddassi
- National Institute for Cellular Biotechnology
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
| | - Dermot F. Brougham
- National Institute for Cellular Biotechnology
- School of Chemical Sciences
- Dublin City University
- Dublin 9
- Ireland
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42
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Alwy A, Clarke SP, Brougham DF, Twamley B, Paull B, White B, Connolly D. Development of a silica monolith modified with Fe3O4 nano-particles in centrifugal spin column format for the extraction of phosphorylated compounds. J Sep Sci 2014; 38:283-90. [PMID: 25376605 DOI: 10.1002/jssc.201400924] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Revised: 10/27/2014] [Accepted: 10/27/2014] [Indexed: 12/24/2022]
Abstract
In this study, citrate-stabilised iron oxide nano-particles (∼16 nm) have been immobilised on commercial silica monolithic centrifugal spin columns (MonoSpin) for the extraction of phosphorylated compounds. Two alternative strategies were adopted involving either direct electrostatic attachment to an aminated MonoSpin (single-layer method) in the first instance, or the use of a layer-by-layer method with poly(diallyldimethylammonium) chloride. Field-emission scanning electron spectroscopy and energy-dispersive X-ray spectroscopy was used for confirming notably higher coverage of nano-particles using the layer-by-layer method (2.49 ± 0.53 wt%) compared with the single-layer method (0.43 ± 0.30 wt%). The modified monolith was used for the selective separation/extraction of adenosine monophosphate, adenosine diphosphate and adenosine triphosphate with elution using a phosphate buffer. A reversed-phase liquid chromatographic assay was used for confirming that adenosine, as a non-phosphorylated control was not retained on the modified MonoSpin devices, whereas recovery of 80% for adenosine monophosphate, 86% for adenosine diphosphate and 82% for adenosine triphosphate was achieved.
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Affiliation(s)
- Ali Alwy
- Irish Separation Science Cluster, National Centre for Sensor Research, Dublin City University, Glasnevin, Dublin, Ireland
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43
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Fraenza CC, Meledandri CJ, Anoardo E, Brougham DF. Cover Picture: The Effect of Cholesterol on Membrane Dynamics on Different Timescales in Lipid Bilayers from Fast Field-Cycling NMR Relaxometry Studies of Unilamellar Vesicles (ChemPhysChem 3/2014). Chemphyschem 2014. [DOI: 10.1002/cphc.201490010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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44
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Fraenza CC, Meledandri CJ, Anoardo E, Brougham DF. The effect of cholesterol on membrane dynamics on different timescales in lipid bilayers from fast field-cycling NMR relaxometry studies of unilamellar vesicles. Chemphyschem 2014; 15:425-35. [PMID: 24482248 DOI: 10.1002/cphc.201301051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Indexed: 01/16/2023]
Abstract
The general applicability of fast field-cycling nuclear magnetic resonance relaxometry in the study of dynamics in lipid bilayers is demonstrated through analysis of binary unilamellar liposomes composed of 1,2-dioleoyl-sn-glycero-3-posphocholine (DOPC) and cholesterol. We extend an evidence-based method to simulating the NMR relaxation response, previously validated for single-component membranes, to evaluate the effect of the sterol molecule on local ordering and dynamics over multiple timescales. The relaxometric results are found to be most consistent with the partitioning of the lipid molecules into affected and unaffected portions, rather than a single averaged phase. Our analysis suggests that up to 25 mol%, each cholesterol molecule orders three DOPC molecules, providing experimental backup to the findings of many molecular dynamics studies. A methodology is established for studying dynamics on multiple timescales in unilamellar membranes of more complex compositions.
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Affiliation(s)
- Carla C Fraenza
- Laboratorio de Relaxometría y Técnicas Especiales, Grupo de Resonancia Magnética Nuclear, Facultad de Matemática, Astronomía y Física, Universidad Nacional de Córdoba and IFEG (CONICET), Córdoba (Argentina)
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45
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Kozlowska D, Biswas S, Fox EK, Wu B, Bolster F, Edupuganti OP, Torchilin V, Eustace S, Botta M, O'Kennedy R, Brougham DF. Gadolinium-loaded polychelating amphiphilic polymer as an enhanced MRI contrast agent for human multiple myeloma and non Hodgkin's lymphoma (human Burkitt's lymphoma). RSC Adv 2014. [DOI: 10.1039/c3ra45400b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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46
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Khan AA, Fox EK, Górzny MŁ, Nikulina E, Brougham DF, Wege C, Bittner AM. pH control of the electrostatic binding of gold and iron oxide nanoparticles to tobacco mosaic virus. Langmuir 2013; 29:2094-2098. [PMID: 23368877 DOI: 10.1021/la3044126] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report the binding of nanoparticles (NPs) to wild type (unmodified) tobacco mosaic virus (TMV). The viruses are simply mixed with citrate-coated, negatively charged gold and iron oxide nanoparticles (IONPs) in acidic solution. This results in TMV decorated along its whole length by the respective particles. Such a decoration usually requires chemical modification or mutation of TMV (e.g., cysteine residues), but here we simply reduce TMV's natural negative charge by protonation. The particles are protonated to a much smaller extent. This charge-based mechanism does not operate for neutral particles.
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Affiliation(s)
- Abid A Khan
- CIC nanoGUNE Consolider, Donostia-San Sebastián, Spain
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47
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Borase T, Ninjbadgar T, Kapetanakis A, Roche S, O'Connor R, Kerskens C, Heise A, Brougham DF. Stable aqueous dispersions of glycopeptide-grafted selectably functionalized magnetic nanoparticles. Angew Chem Int Ed Engl 2013; 52:3164-7. [PMID: 23371331 DOI: 10.1002/anie.201208099] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Tushar Borase
- School of Chemical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland
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48
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Borase T, Ninjbadgar T, Kapetanakis A, Roche S, O'Connor R, Kerskens C, Heise A, Brougham DF. Stable Aqueous Dispersions of Glycopeptide-Grafted Selectably Functionalized Magnetic Nanoparticles. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Lartigue L, Hugounenq P, Alloyeau D, Clarke SP, Lévy M, Bacri JC, Bazzi R, Brougham DF, Wilhelm C, Gazeau F. Cooperative organization in iron oxide multi-core nanoparticles potentiates their efficiency as heating mediators and MRI contrast agents. ACS Nano 2012; 6:10935-49. [PMID: 23167525 DOI: 10.1021/nn304477s] [Citation(s) in RCA: 142] [Impact Index Per Article: 11.8] [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
In the pursuit of optimized magnetic nanostructures for diagnostic and therapeutic applications, the role of nanoparticle architecture has been poorly investigated. In this study, we demonstrate that the internal collective organization of multi-core iron oxide nanoparticles can modulate their magnetic properties in such a way as to critically enhance their hyperthermic efficiency and their MRI T(1) and T(2) contrast effect. Multi-core nanoparticles composed of maghemite cores were synthesized through a polyol approach, and subsequent electrostatic colloidal sorting was used to fractionate the suspensions by size and hence magnetic properties. We obtained stable suspensions of citrate-stabilized nanostructures ranging from single-core 10 nm nanoparticles to multi-core magnetically cooperative 30 nm nanoparticles. Three-dimensional oriented attachment of primary cores results in enhanced magnetic susceptibility and decreased surface disorder compared to individual cores, while preserving a superparamagnetic-like behavior of the multi-core structures and potentiating thermal losses. Exchange coupling in the multi-core nanoparticles modifies the dynamics of the magnetic moment in such a way that both the longitudinal and transverse NMR relaxivities are also enhanced. Long-term MRI detection of tumor cells and their efficient destruction by magnetic hyperthermia can be achieved thanks to a facile and nontoxic cell uptake of these iron oxide nanostructures. This study proves for the first time that cooperative magnetic behavior within highly crystalline iron oxide superparamagnetic multi-core nanoparticles can improve simultaneously therapeutic and diagnosis effectiveness over existing nanostructures, while preserving biocompatibility.
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Affiliation(s)
- Lénaic Lartigue
- Laboratoire Matières et Systèmes Complexes, UMR 7057 CNRS/ Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, 75013 Paris, France
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50
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Sheridan JG, Heidelberg A, Brougham DF, Nellist PD, Langford RM, Boland JJ. Self-assembly of LiMo3Se3 nanowire networks from nanoscale building-blocks in solution. Langmuir 2012; 28:15344-15349. [PMID: 23009286 DOI: 10.1021/la301918x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
LiMo(3)Se(3) is a highly anisotropic solid comprised of a regular pattern of quasi-1-D wire-like structures. Solutions of LiMo(3)Se(3) deposited on substrates and TEM grids reveal the presence of two-dimensional network morphologies. High resolution STEM imaging reveals that the junctions within these networks are not formed by discrete overlying LiMo(3)Se(3) fibers or wires. Rather the junctions are continuous in that the wires are seamlessly interwoven from one bundle to the next. We investigated network formation by dynamic light scattering and AFM and demonstrate that the networks are not pre-existent in solution but rather form via self-assembly of nanoscale building blocks that is driven by solvent evaporation.
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Affiliation(s)
- John G Sheridan
- School of Chemistry and the Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Ireland
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