1
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Llorens JS, Barbera L, Demirörs AF, Studart AR. Light-Based 3D Printing of Complex-Shaped Photonic Colloidal Glasses. Adv Mater 2023; 35:e2302868. [PMID: 37470316 DOI: 10.1002/adma.202302868] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/25/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
Colloidal glasses display angle-independent structural color that is tunable by the size and local arrangement of sub-micrometer particles. While films, droplets, and microcapsules with isotropic structural color have been demonstrated, the shaping of colloidal glasses in three dimensions remains an open manufacturing challenge. Here, a light-based printing platform for the shaping of colloidal glasses into 3D objects featuring complex geometries and vivid structural color after thermal treatment is reported. Rheology, photopolymerization, and calcination experiments are performed to design the photoreactive resins leading to printable colloidal glasses. With the help of microscopy, scattering, and optical characterization, it is shown that the photonic properties of the printed objects reflect the locally ordered microstructure of the glass. The capability of the platform in creating 3D objects with isotropic structural color is illustrated by printing lattices and miniaturized sculpture replicas with unique shapes and multimaterial designs.
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Affiliation(s)
| | - Lorenzo Barbera
- Complex Materials, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland
| | - Ahmet F Demirörs
- Complex Materials, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland
- Soft Matter and Photonics, Department of Physics, University of Fribourg, 1700, Fribourg, Switzerland
| | - Andre R Studart
- Complex Materials, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland
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2
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Marcelino T, Docampo MAR, Qian X, Ade C, Brodszkij E, Ceccato M, Foss M, Dulchavsky M, Bardwell JCA, Städler B. Surfaces Coated with Polymer Brushes Work as Carriers for Histidine Ammonia Lyase. Macromol Biosci 2023; 23:e2200528. [PMID: 36971346 DOI: 10.1002/mabi.202200528] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 03/10/2023] [Indexed: 03/29/2023]
Abstract
The immobilization of enzymes on solid supports is an important challenge in biotechnology and biomedicine. In contrast to other methods, enzyme deposition in polymer brushes offers the benefit of high protein loading that preserves enzymatic activity in part due to the hydrated 3D environment that is available within the brush structure. The authors equipped planar and colloidal silica surfaces with poly(2-(diethylamino)ethyl methacrylate)-based brushes to immobilize Thermoplasma acidophilum histidine ammonia lyase, and analyzed the amount and activity of the immobilized enzyme. The poly(2-(diethylamino)ethyl methacrylate) brushes are attached to the solid silica supports either via a "grafting-to" or a "grafting-from" method. It is found that the grafting-from method results in higher amounts of deposited polymer and, consequently, higher amounts of Thermoplasma acidophilum histidine ammonia lyase. All polymer brush-modified surfaces show preserved catalytic activity of the deposited Thermoplasma acidophilum histidine ammonia lyase. However, immobilizing the enzyme in polymer brushes using the grafting-from method resulted in twice the enzymatic activity from the grafting-to approach, illustrating a successful enzyme deposition on a solid support.
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Affiliation(s)
- Thaís Marcelino
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
- Sino-Danish College (SDC), University of Chinese Academy of Sciences, Beijing, 101408, P. R. China
| | - Miguel A Ramos Docampo
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Xiaomin Qian
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Carina Ade
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Edit Brodszkij
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Marcel Ceccato
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
- Sino-Danish College (SDC), University of Chinese Academy of Sciences, Beijing, 101408, P. R. China
| | - Morten Foss
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
- Sino-Danish College (SDC), University of Chinese Academy of Sciences, Beijing, 101408, P. R. China
| | - Mark Dulchavsky
- Department of Molecular, Cellular, and Developmental Biology and Howard Hughes Medical Institute, University of Michigan, University Avenue 1105 N., Ann Arbor, MI, 48109, USA
| | - James C A Bardwell
- Department of Molecular, Cellular, and Developmental Biology and Howard Hughes Medical Institute, University of Michigan, University Avenue 1105 N., Ann Arbor, MI, 48109, USA
| | - Brigitte Städler
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
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3
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Strobl J, Kozak F, Kamalov M, Reichinger D, Kurzbach D, Becker CF. Understanding Self-Assembly of Silica-Precipitating Peptides to Control Silica Particle Morphology. Adv Mater 2023; 35:e2207586. [PMID: 36509953 DOI: 10.1002/adma.202207586] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 12/05/2022] [Indexed: 06/17/2023]
Abstract
The most advanced materials are those found in nature. These evolutionary optimized substances provide highest efficiencies, e.g., in harvesting solar energy or providing extreme stability, and are intrinsically biocompatible. However, the mimicry of biological materials is limited to a few successful applications since there is still a lack of the tools to recreate natural materials. Herein, such means are provided based on a peptide library derived from the silaffin protein R5 that enables rational biomimetic materials design. It is now evident that biomaterials do not form via mechanisms observed in vitro. Instead, the material's function and morphology are predetermined by precursors that self-assemble in solution, often from a combination of protein and salts. These assemblies act as templates for biomaterials. The RRIL peptides used here are a small part of the silica-precipitation machinery in diatoms. By connecting RRIL motifs via varying central bi- or trifunctional residues, a library of stereoisomers is generated, which allows characterization of different template structures in the presence of phosphate ions by combining residue-resolved real-time NMR spectroscopy and molecular dynamics (MD) simulations. Understanding these templates in atomistic detail, the morphology of silica particles is controlled via manipulation of the template precursors.
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Affiliation(s)
- Johannes Strobl
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
| | - Fanny Kozak
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
| | - Meder Kamalov
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
| | - Daniela Reichinger
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
| | - Dennis Kurzbach
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
| | - Christian Fw Becker
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, Vienna, 109, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, Vienna, 1090, Austria
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4
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Ma H, Xia S, Sun C, Yu F, Cameron A, Zheng W, Shu Q, Pei H, Han Y. Novel Strategy of Polymers in Combination with Silica Particles for Reversible Control of Oil-Water Interface. ACS Appl Mater Interfaces 2023; 15:2216-2227. [PMID: 36576434 DOI: 10.1021/acsami.2c19037] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hybrid smart emulsification systems are highly applicable in manipulating oil-in-water (O/W) droplets. Herein, novel switchable block polymers containing both zwitterionic and tertiary amine pendent groups were designed and synthesized to combine with charged silica particles to stabilize the O/W emulsion responsive to pH. This study was carried out in O/W emulsions stabilized with the polymer and silica particles under different pH conditions. The emulsion system was also simulated using molecular dynamics simulation to reveal the mechanism at molecular levels, thus gaining insight into the relationships between the emulsifying properties and the molecular interaction of the mixed system. Upon acidification of the continuous aqueous phase, protonated polymers with excellent hydrophilicity were induced by charged silica particles to cause rapid emulsion coalescence. In alkaline media, the mixed system conversely stabilized the O/W emulsions, cutting polymer consumption by over three-quarters. The emulsification and demulsification can be switched alternately by tuning the pH conditions. The applications exhibited excellent efficiency in separating heavy oil/water emulsions and proved the high conversion rate in emulsion polymerization. Overall, with this novel strategy to relieve tedious modifications on particle surfaces and massive consumption of polymers, the designed responsive emulsification systems can impart intelligent and controllable chemical reactivity to emulsions on demand in a more affordable and sustainable way.
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Affiliation(s)
- Hao Ma
- School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China
| | - Shuqian Xia
- School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China
| | - Caixia Sun
- School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China
| | - Fuce Yu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China
| | - Alexandre Cameron
- School of Mining and Petroleum Engineering, University of Alberta, Edmonton, AlbertaT6G 1H9, Canada
| | - Wangang Zheng
- Research Institute of Petroleum Engineering, Sinopec Shengli Oilfield Co., Ltd., Dongying, Shandong257067, China
| | - Qinglin Shu
- Research Institute of Petroleum Engineering, Sinopec Shengli Oilfield Co., Ltd., Dongying, Shandong257067, China
| | - Haihua Pei
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao266580, China
| | - You Han
- School of Chemical Engineering and Technology, Tianjin University, Tianjin300350, China
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5
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Reichinger D, Reithofer M, Hohagen M, Drinic M, Tobias J, Wiedermann U, Kleitz F, Jahn-Schmid B, Becker CFW. A Biomimetic, Silaffin R5-Based Antigen Delivery Platform. Pharmaceutics 2022; 15:pharmaceutics15010121. [PMID: 36678751 PMCID: PMC9866965 DOI: 10.3390/pharmaceutics15010121] [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: 11/28/2022] [Revised: 12/22/2022] [Accepted: 12/24/2022] [Indexed: 01/01/2023] Open
Abstract
Nature offers a wide range of evolutionary optimized materials that combine unique properties with intrinsic biocompatibility and that can be exploited as biomimetic materials. The R5 and RRIL peptides employed here are derived from silaffin proteins that play a crucial role in the biomineralization of marine diatom silica shells and are also able to form silica materials in vitro. Here, we demonstrate the application of biomimetic silica particles as a vaccine delivery and adjuvant platform by linking the precipitating peptides R5 and the RRIL motif to a variety of peptide antigens. The resulting antigen-loaded silica particles combine the advantages of biomaterial-based vaccines with the proven intracellular uptake of silica particles. These particles induce NETosis in human neutrophils as well as IL-6 and TNF-α secretion in murine bone marrow-derived dendritic cells.
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Affiliation(s)
- Daniela Reichinger
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Manuel Reithofer
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
- Institute of Molecular Biotechnology, Department of Biotechnology, University of Natural Resources and Life Sciences, Gregor-Mendel-Straße 33, 1180 Vienna, Austria
| | - Mariam Hohagen
- Vienna Doctoral School in Chemistry (DoSChem), University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
- Department of Inorganic Chemistry–Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Mirjana Drinic
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Joshua Tobias
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Ursula Wiedermann
- Institute of Specific Prophylaxis and Tropical Medicine, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Kinderspitalgasse 15, 1090 Vienna, Austria
| | - Freddy Kleitz
- Department of Inorganic Chemistry–Functional Materials, Faculty of Chemistry, University of Vienna, Währinger Str. 42, 1090 Vienna, Austria
| | - Beatrice Jahn-Schmid
- Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Währinger Gürtel 18-20, 1090 Vienna, Austria
| | - Christian F. W. Becker
- Institute of Biological Chemistry, Faculty of Chemistry, University of Vienna, Währinger Str. 38, 1090 Vienna, Austria
- Correspondence:
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6
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Matsuura S, Obara M, Iwata N, Furumi S. Colloidal Crystal Films with Narrow Reflection Bands by Hot-Pressing of Polymer-Grafted Silica Particles. Polymers (Basel) 2022; 14. [PMID: 36501554 DOI: 10.3390/polym14235157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 11/22/2022] [Indexed: 11/30/2022] Open
Abstract
Previous reports have shown that colloidal crystal (CC) films with visible Bragg reflection characteristics can be fabricated by the surface modification of monodisperse silica particles (SiPs) with poly(methyl methacrylate) (PMMA) chains, followed by hot-pressing at 150 °C. However, the reflection bands of the CC films were very broad due to their relative disordering of SiPs. In this report, we attempted to fabricate the CC films using SiPs surface-modified with poly(n-octyl acrylate) (POA) chains by hot-pressing. When the cast films of POA-grafted SiPs were prepared by hot-pressing at 100 °C, the reflection bands were narrow rather than those of CC films of PMMA-grafted SiPs. This can be ascribed to easy disentanglement of POA chains during the hot-pressing process, thereby enabling the formation of well-ordered CC structures. Moreover, the reflection colors of CC films could be easily tuned by controlling the molecular weight of POA chains grafted on the SiP surface.
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7
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Soto KM, Gódinez-Oviedo A, López-Romero JM, Rivera-Muñoz EM, López-Naranjo EJ, Mendoza-Díaz S, Manzano-Ramírez A. Comparative Study between Two Simple Synthesis Methods for Obtaining Green Gold Nanoparticles Decorating Silica Particles with Antibacterial Activity. Materials (Basel) 2022; 15:7635. [PMID: 36363227 PMCID: PMC9654145 DOI: 10.3390/ma15217635] [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] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 10/26/2022] [Accepted: 10/27/2022] [Indexed: 06/16/2023]
Abstract
The SiO2 particles system is one of the most common ways to protect colloidal metal systems, such as gold nanoparticles, from aggregation and activity loss due to their high chemical stability and low reactivity. In this study, silica green gold nanoparticles (AuNPs synthesized with mullein extract) were fabricated using two different sol-gel methods. The nanoparticles were characterized by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD), Fourier Transformed Infrared (FTIR), and the antibacterial activity against pathogens (Staphylococcus aureus, Listeria monocytogenes, Escherichia coli, and Salmonella enterica). Synthesis-1 nanoparticles had a kidney-shaped form and uniform distribution, while synthesis-2 nanoparticles had a spherical and non-uniform form. Characterization showed that temperature is an important factor in the distribution of AuNPs in silica; a decrease allowed the formation of Janus-type, and an increase showed a higher concentration of gold in energy-dispersive spectroscopy (EDS) analysis. Overall, similar bands of the two synthesis silica nanoparticles were observed in FTIR, while XRD spectra showed differences in the preferential growth in AuNPs depending on the synthesis. Higher antibacterial activity was observed against S. aureus, which was followed by L. monocytogenes. No differences were observed in the antibacterial activity between the two different sol-gel methods.
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Affiliation(s)
- Karen M. Soto
- Centro de Investigaciones y de Estudios Avanzados del I.P.N., Unidad Querétaro, Querétaro 76230, Mexico
| | - Angelica Gódinez-Oviedo
- Departamento de Investigación y Posgrado en Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Querétaro 76010, Mexico
| | - José. M. López-Romero
- Centro de Investigaciones y de Estudios Avanzados del I.P.N., Unidad Querétaro, Querétaro 76230, Mexico
| | - Eric. M. Rivera-Muñoz
- Centro de Física Aplicada y Tecnología Avanzada, Universidad Nacional Autónoma de México, Querétaro 76000, Mexico
| | - Edgar Jose López-Naranjo
- Departamento de Ingeniería de Proyectos-CUCEI, Universidad de Guadalajara, Guadalajara 44100, Mexico
| | - Sandra Mendoza-Díaz
- Departamento de Investigación y Posgrado en Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Querétaro 76010, Mexico
| | - Alejandro Manzano-Ramírez
- Centro de Investigaciones y de Estudios Avanzados del I.P.N., Unidad Querétaro, Querétaro 76230, Mexico
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8
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Estrada Alvarez SA, Guger I, Febbraro J, Turak A, Lin HR, Salinas Y, Brüggemann O. Synthesis and Spatial Order Characterization of Controlled Silica Particle Sizes Organized as Photonic Crystals Arrays. Materials (Basel) 2022; 15:5864. [PMID: 36079248 PMCID: PMC9456689 DOI: 10.3390/ma15175864] [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] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/10/2022] [Accepted: 08/18/2022] [Indexed: 06/15/2023]
Abstract
The natural occurrence of precious opals, consisting of highly organized silica particles, has prompted interest in the synthesis and formation of these structures. Previous research has shown that a highly organized photonic crystal (PhC) array is only possible when it is based on a low polydispersity index (PDI) sample of particles. In this study, a solvent-only variation method is used to synthesize different sizes of silica particles (SiPs) by following the traditional sol-gel Stöber approach. The controlled rate of the addition of the reagents promoted the homogeneity of the nucleation and growth of the spherical silica particles, which in turn yielded a low PDI. The opalescent PhC were obtained via self-assembly of these particles using a solvent evaporation method. Analysis of the spatial statistics, using Voronoi tessellations, pair correlation functions, and bond order analysis showed that the successfully formed arrays showed a high degree of quasi-hexagonal (hexatic) organization, with both global and local order. Highly organized PhC show potential for developing future materials with tunable structural reflective properties, such as solar cells, sensing materials, and coatings, among others.
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Affiliation(s)
- Silvia Adriana Estrada Alvarez
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
- Linz Institute of Technology (LIT), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Isabella Guger
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Jana Febbraro
- Department of Engineering Physics, McMaster University, Hamilton, ON L8S 4L7, Canada
| | - Ayse Turak
- Department of Engineering Physics, McMaster University, Hamilton, ON L8S 4L7, Canada
| | - Hong-Ru Lin
- Linz Institute of Technology (LIT), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
- Department of Chemical and Materials Engineering, Southern Taiwan University of Science and Technology, Nantai St. No.1, Tainan 71005, Taiwan
| | - Yolanda Salinas
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
- Linz Institute of Technology (LIT), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
| | - Oliver Brüggemann
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
- Linz Institute of Technology (LIT), Johannes Kepler University Linz, Altenberger Strasse 69, 4040 Linz, Austria
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9
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Jordanoski D, Drobne D, Repar N, Dogsa I, Mrak P, Cerc-Korošec R, Škapin AS, Nadrah P, Poklar Ulrih N. A Novel Artificial Hemoglobin Carrier Based on Heulandite-Calcium Mesoporous Aluminosilicate Particles. Int J Mol Sci 2022; 23:7460. [PMID: 35806461 PMCID: PMC9267069 DOI: 10.3390/ijms23137460] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 06/30/2022] [Accepted: 07/01/2022] [Indexed: 02/04/2023] Open
Abstract
Tetraethyl-orthosilicate (TEOS)-based nanoparticles are most extensively used as a silica-based hemoglobin carrier system. However, TEOS-based nanoparticles induce adverse effects on the hemoglobin structure. Therefore, a heulandite-calcium-based carrier was investigated as a novel silica-based hemoglobin carrier system. The heulandite-calcium mesoporous aluminosilicate particles (MSPs) were fabricated by a patented tribo-mechanical activation process, according to the manufacturer, and its structure was assessed by X-ray diffraction analysis. Upon hemoglobin encapsulation, alternation in the secondary and tertiary structure was observed. The hemoglobin-particle interactions do not cause heme degradation or decreased activity. Once encapsulated inside the particle pores, the hemoglobin shows increased thermal stability, and higher loading capacity per gram of particles (by a factor of >1.4) when compared to TEOS-based nanoparticles. Futhermore, we introduced a PEGlyted lipid bilayer which significantly decreases the premature hemoglobin release and increases the colloidal stability. The newly developed hemoglobin carrier shows no cytotoxicity to human umbilical vein endothelial cells (HUVEC).
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Affiliation(s)
- Dino Jordanoski
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
| | - Damjana Drobne
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
| | - Neža Repar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
| | - Iztok Dogsa
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
| | - Polona Mrak
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
| | - Romana Cerc-Korošec
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna Pot, 1000 Ljubljana, Slovenia;
| | - Andrijana Sever Škapin
- Slovenian National Bulding and Civil Engineering Institute, Dimičeva Ulica 12, 1000 Ljubljana, Slovenia; (A.S.Š.); (P.N.)
| | - Peter Nadrah
- Slovenian National Bulding and Civil Engineering Institute, Dimičeva Ulica 12, 1000 Ljubljana, Slovenia; (A.S.Š.); (P.N.)
| | - Natasa Poklar Ulrih
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000 Ljubljana, Slovenia; (D.J.); (D.D.); (N.R.); (I.D.); (P.M.)
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10
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Koshkina O, Raju LT, Kaltbeitzel A, Riedinger A, Lohse D, Zhang X, Landfester K. Surface Properties of Colloidal Particles Affect Colloidal Self-Assembly in Evaporating Self-Lubricating Ternary Droplets. ACS Appl Mater Interfaces 2022; 14:2275-2290. [PMID: 34931807 PMCID: PMC8763378 DOI: 10.1021/acsami.1c19241] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/29/2021] [Indexed: 05/05/2023]
Abstract
In this work, we unravel the role of surface properties of colloidal particles on the formation of supraparticles (clusters of colloidal particles) in a colloidal Ouzo droplet. Self-lubricating colloidal Ouzo droplets are an efficient and simple approach to form supraparticles, overcoming the challenge of the coffee stain effect in situ. Supraparticles are an efficient route to high-performance materials in various fields, from catalysis to carriers for therapeutics. Yet, the role of the surface of colloidal particles in the formation of supraparticles using Ouzo droplets remains unknown. Therefore, we used silica particles as a model system and compared sterically stabilized versus electrostatically stabilized silica particles─positively and negatively charged. Additionally, we studied the effect of hydration. Hydrated negatively charged silica particles and sterically stabilized silica particles form supraparticles. Conversely, dehydrated negatively charged silica particles and positively charged amine-coated particles form flat film-like deposits. Notably, the assembly process is different for all the four types of particles. The surface modifications alter (a) the contact line motion of the Ouzo droplet and (b) the particle-oil and particle-substrate interactions. These alterations modify the particle accumulation at the various interfaces, which ultimately determines the shape of the final deposit. Thus, by modulating the surface properties of the colloidal particles, we can tune the shape of the final deposit, from a spheroidal supraparticle to a flat deposit. In the future, this approach can be used to tailor the supraparticles for applications such as optics and catalysis, where the shape affects the functionality.
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Affiliation(s)
- Olga Koshkina
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Lijun Thayyil Raju
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
| | - Anke Kaltbeitzel
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Andreas Riedinger
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Detlef Lohse
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
- Max
Planck Institute for Dynamics and Self-Organisation, 37077 Göttingen,
Am Fassberg 17, Germany
| | - Xuehua Zhang
- Physics
of Fluids Group, Max Planck Center for Complex Fluid Dynamics, MESA+
Institute and J. M. Burgers Center for Fluid Dynamics, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
- Department
of Chemical and Materials Engineering, University
of Alberta, 12-380 Donadeo Innovation Centre for Engineering, Edmonton, T6G1H9 Alberta, Canada
| | - Katharina Landfester
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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11
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Shi J, Ci Y, Zheng Y, Chen W, Chen X. Submicron silica particles have cytotoxicities on hepatocellular carcinoma, non-small cell lung cancer and breast cancer by unified regulating the XLOC_001659/miR-98-5p/MAP3K2-mediated pathway. Toxicol Res (Camb) 2021; 10:824-834. [PMID: 34484674 DOI: 10.1093/toxres/tfab062] [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: 11/30/2020] [Revised: 06/03/2021] [Accepted: 06/15/2021] [Indexed: 12/09/2022] Open
Abstract
The cytotoxicities of silica (SiO2s) particles against cancers are still controversial. In this study, the purchased submicron silica particles (SM-SiO2s) were identified by transmission electron microscopy and energy dispersive spectrometer, and it showed potent cytotoxicities on hepatocellular carcinoma (HCC), non-small cell lung cancer (NSCLC) and breast cancer (BC), which ranked the top in the incidence among the tumor types. Through the microarray assay on long noncoding RNAs (lncRNAs) from the SM-SiO2s-treated HCC, NSCLC and BC cells, followed by Venn analysis, we found that a series of lncRNAs were significantly regulated by SM-SiO2s, among of which XLOC_001659 was mostly decreased. Quantitative reverse transcription-polymerase chain reaction (qRT-PCR) assay confirmed that XLOC_001659 could be decreased in all the SM-SiO2s-treated HCC, NSCLC and BC cells, coupled to inhibited cell proliferation. Further, XLOC_001659 was recognized as a miR-98-5p sponge and therefore modulates the "pro-inflammatory tumor promoter" MAP3K2 expressions. The XLOC_001659/miR-98-5p/MAP3K2 axis uniformly mediated the regulation of SM-SiO2s on proliferation of HCC, NSCLC and BC cells. Further clinical experiments demonstrated that XLOC_001659 was negatively correlated with miR-98-5p level and positively correlated with MAP3K2 level, and XLOC_001659/miR-98-5p/MAP3K2 axis was significantly associated with progressions and prognosis in HCC, NSCLC and BC patients. These results provide a new clue for the anti-tumor mechanism of SM-SiO2s and a new way for drug development by using SM-SiO2s.
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Affiliation(s)
- Jingdong Shi
- General Surgery Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
| | - Yukun Ci
- Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao 266011, China
| | - Ying Zheng
- Department of Genome Sciences, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Wenhui Chen
- Thoracic Surgery Department, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China
| | - Xi Chen
- Breast Surgery Department, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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12
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Marashdeh MQ, Stewart CA, Kishen A, Levesque C, Finer Y. Assessment of Root Canal Sealers Loaded with Drug-Silica Coassembled Particles Using an In Vitro Tooth Model. J Endod 2021; 47:1775-82. [PMID: 34425150 DOI: 10.1016/j.joen.2021.08.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 08/07/2021] [Accepted: 08/12/2021] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The purpose of this study was to assess the antimicrobial activity of root canal sealers modified with novel highly loaded antimicrobial drug-silica coassembled particles (DSPs) on Enterococcus faecalis-infected root canal dentin. METHODS DSPs were synthesized through coassembly of silica and octenidine dihydrochloride (OCT) surfactant drug (35% w/w OCT). DSPs (1% wt of the total mass of the sealer) were mixed homogenously with either epoxy resin sealer (AH Plus [AH]; Dentsply Sirona, Tulsa, OK) or calcium silicate-based sealer (EndoSequence BC Sealer [BC]; Brasseler, Savannah, GA). To assess the antimicrobial activity of DSP-loaded sealers, the apical third of single-rooted teeth was obtained and infected with E. faecalis for 3 weeks followed by the application of experimental (DSP-loaded) sealers or corresponding controls for up to 28 days. Microbiological analysis and laser scanning confocal and scanning electron microscopy were used to determine the colony-forming unit (CFU)/mL, the percentage of live bacteria, and the intratubular bacterial and sealer penetrations. Factorial analysis of variance and Tukey post hoc tests were used to assess the antimicrobial effect of DSPs on different sealers. RESULTS All experimental groups showed significant reductions in CFUs at all-time points compared with positive controls (P < .05). The addition of DSPs to BC significantly reduced the CFUs (2.11 ± 0.13, 2.22 ± 0.19, and 2.25 ± 0.17 at 1, 7, and 28 days, respectively) compared with the unmodified sealer (3.21 ± 0.11, 4.3 ± 0.15, and 4.2 ± 0.2 at 0, 7, and 28 days). DSPs enhanced the antimicrobial performance of AH only at 1 day (4.21 ± 0.17 vs 5.19 ± 0.12, P < .05). AH and AH + DSPs showed higher bacterial viability compared with BC and BC + DSPs at all incubation periods (P < .05). CONCLUSIONS Loading endodontic sealers with DSPs had a material-dependent effect on the antimicrobial properties and could reduce the incidence of secondary infections.
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Debons N, Matsumoto K, Hirota N, Coradin T, Ikoma T, Aimé C. Magnetic Field Alignment, a Perspective in the Engineering of Collagen-Silica Composite Biomaterials. Biomolecules 2021; 11:749. [PMID: 34069793 PMCID: PMC8157240 DOI: 10.3390/biom11050749] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/12/2021] [Accepted: 05/13/2021] [Indexed: 02/02/2023] Open
Abstract
Major progress in the field of regenerative medicine is expected from the design of artificial scaffolds that mimic both the structural and functional properties of the ECM. The bionanocomposites approach is particularly well fitted to meet this challenge as it can combine ECM-based matrices and colloidal carriers of biological cues that regulate cell behavior. Here we have prepared bionanocomposites under high magnetic field from tilapia fish scale collagen and multifunctional silica nanoparticles (SiNPs). We show that scaffolding cues (collagen), multiple display of signaling peptides (SiNPs) and control over the global structuration (magnetic field) can be combined into a unique bionanocomposite for the engineering of biomaterials with improved cell performances.
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Affiliation(s)
- Nicolas Debons
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 75005 Paris, France; (N.D.); (T.C.)
| | - Kenta Matsumoto
- Tokyo Institute of Technology, School of Materials and Chemical Technology, Department of Materials Science and Engineering, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8550, Japan; (K.M.); (T.I.)
| | - Noriyuki Hirota
- National Institute for Materials Science, Fine Particles Engineering Group, 3-13 Sakura, Tuskuba 305-0003, Japan;
| | - Thibaud Coradin
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 75005 Paris, France; (N.D.); (T.C.)
| | - Toshiyuki Ikoma
- Tokyo Institute of Technology, School of Materials and Chemical Technology, Department of Materials Science and Engineering, Ookayama 2-12-1, Meguro-ku, Tokyo 152-8550, Japan; (K.M.); (T.I.)
| | - Carole Aimé
- Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, 75005 Paris, France; (N.D.); (T.C.)
- Ecole Normale Supérieure, CNRS-ENS-SU UMR 8640, 24 rue Lhomond, 75005 Paris, France
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14
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Barros M, López-Carrasco A, Amorós P, Gil S, Gaviña P, Parra M, El Haskouri J, Terencio MC, Costero AM. Chromogenic Chemodosimeter Based on Capped Silica Particles to Detect Spermine and Spermidine. Nanomaterials (Basel) 2021; 11:nano11030818. [PMID: 33806899 PMCID: PMC8004735 DOI: 10.3390/nano11030818] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/12/2021] [Accepted: 03/16/2021] [Indexed: 11/21/2022]
Abstract
A new hybrid organic–inorganic material for sensing spermine (Spm) and spermidine (Spd) has been prepared and characterized. The material is based on MCM-41 particles functionalized with an N-hydroxysuccinimide derivative and loaded with Rhodamine 6G. The cargo is kept inside the porous material due to the formation of a double layer of organic matter. The inner layer is covalently bound to the silica particles, while the external layer is formed through hydrogen and hydrophobic interactions. The limits of detection determined by fluorimetric titration are 27 µM and 45 µM for Spm and Spd, respectively. The sensor remains silent in the presence of other biologically important amines and is able to detect Spm and Spd in both aqueous solution and cells.
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Affiliation(s)
- Mariana Barros
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
| | - Alejandro López-Carrasco
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
| | - Pedro Amorós
- Instituto de Ciencia de Materiales (ICMUV), Universitat de València, P.O. Box 2085, 46071 Valencia, Spain;
- Correspondence: (P.A.); (A.M.C.)
| | - Salvador Gil
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Pablo Gaviña
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Margarita Parra
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
| | - Jamal El Haskouri
- Instituto de Ciencia de Materiales (ICMUV), Universitat de València, P.O. Box 2085, 46071 Valencia, Spain;
| | - Maria Carmen Terencio
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
- Departamento de Farmacología, Universitat de València, Vicente Andrés Estellés S/n, Burjassot, 46100 Valencia, Spain
| | - Ana M. Costero
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitad Politècnica de València, Universitat de València, Doctor Moliner 50, Burjassot, 46100 Valencia, Spain; (M.B.); (A.L.-C.); (S.G.); (P.G.); (M.P.); (M.C.T.)
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), 28029 Madrid, Spain
- Correspondence: (P.A.); (A.M.C.)
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15
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Chen TH, Huang SY, Huang SY, Lin JD, Huang BY, Kuo CT. Improvement of the Centrifugal Force in Gravity Driven Method for the Fabrication of Highly Ordered and Submillimeter-Thick Colloidal Crystal. Polymers (Basel) 2021; 13:polym13050692. [PMID: 33669140 PMCID: PMC7956211 DOI: 10.3390/polym13050692] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/19/2021] [Accepted: 02/21/2021] [Indexed: 11/16/2022] Open
Abstract
In this paper, we propose a modified gravity method by introducing centrifugal force to promote the stacking of silica particles and the order of formed colloidal crystals. In this method, a monodispersed silica colloidal solution is filled into empty cells and placed onto rotation arms that are designed to apply an external centrifugal force to the filled silica solution. When sample fabrication is in progress, silica particles are forced toward the edges of the cells. The number of defects in the colloidal crystal decreases and the structural order increases during this process. The highest reflectivity and structural order of a sample was obtained when the external centrifugal force was 18 G. Compared to the samples prepared using the conventional stacking method, samples fabricated with centrifugal force possess higher reflectivity and structural order. The reflectivity increases from 68% to 90%, with an increase in centrifugal force from 0 to 18 G.
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Affiliation(s)
- Ting-Hui Chen
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan; (T.-H.C.); (S.-Y.H.)
| | - Shuan-Yu Huang
- Department of Optometry, Chung Shan Medical University, Taichung 40201, Taiwan;
| | - Syuan-Yi Huang
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan; (T.-H.C.); (S.-Y.H.)
| | - Jia-De Lin
- Department of Opto-Electronic, National Dong Hwa University, Hualien 974301, Taiwan;
| | - Bing-Yau Huang
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan; (T.-H.C.); (S.-Y.H.)
- Correspondence: (B.-Y.H.); (C.-T.K.)
| | - Chie-Tong Kuo
- Department of Physics, National Sun Yat-sen University, Kaohsiung 80424, Taiwan; (T.-H.C.); (S.-Y.H.)
- Department of Optometry, Shu-Zen Junior College of Medicine and Management, Kaohsiung 82144, Taiwan
- Correspondence: (B.-Y.H.); (C.-T.K.)
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16
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Gruzd A, Tokarev A, Tokarev I, Kuksenkov D, Minko S. All-Nanoparticle Monolayer Broadband Antireflective and Self-Cleaning Transparent Glass Coatings. ACS Appl Mater Interfaces 2021; 13:6767-6777. [PMID: 33523621 DOI: 10.1021/acsami.0c18776] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The vast majority of light-emitting diode and liquid-crystal displays, solar panels, and windows in residential and industrial buildings use glass panels owing to their high mechanical stability, chemical resistance, and optical properties. Glass surfaces reflect about 4-5% of incident light if no antireflective coating is applied. In addition to energy losses in displays, surface reflections diminish picture quality. Engineering of antireflective coatings can be beneficial for all types of glass screens, specifically for large screens and touch-screen devices when scratch-resistance and self-cleaning properties of the glass surface are also desired. A scalable and robust approach to produce antireflective coatings for glass surfaces with desired optical and mechanical properties is introduced in this work. The developed coating mimics the structure of a moth-eye cornea. The coating is a subwavelength-microstructured thin layer on the glass surface made of a monolayer of hemispherical silica nanoparticles obtained by hydrothermal fusion of spherical particles to the glass substrate. The sequence of the particle deposition in the layer-by-layer process is adjusted to balance attractive-repulsive interactions among nanoparticles and between the nanoparticles and the glass surface to generate coatings with a high surface coverage of up to 70%, which exceeds the 54.7% limit of the random sequential addition model. This level of surface coverage allows for a combination of properties beneficial for the described applications: (i) an average reflectance of 0.5 ± 0.2% for a visible and near-infrared optical spectrum, (ii) an improved mechanical stability and scratch resistance, and (iii) non-wetting behavior.
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Affiliation(s)
- Alexey Gruzd
- Nanostructured Materials Lab, University of Georgia, Athens, Georgia 30602, United States
| | - Alexander Tokarev
- Nanostructured Materials Lab, University of Georgia, Athens, Georgia 30602, United States
| | - Igor Tokarev
- Eastman Chemical Company, Kingsport, Tennessee 37660, United States
| | - Dmitri Kuksenkov
- Sullivan Park Science & Technology Center, Corning Incorporated, Corning, New York 14831, United States
| | - Sergiy Minko
- Nanostructured Materials Lab, University of Georgia, Athens, Georgia 30602, United States
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17
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Bago Rodriguez AM, Schober L, Hinzmann A, Gröger H, Binks BP. Effect of Particle Wettability and Particle Concentration on the Enzymatic Dehydration of n-Octanaloxime in Pickering Emulsions. Angew Chem Int Ed Engl 2021; 60:1450-1457. [PMID: 33119950 PMCID: PMC7839585 DOI: 10.1002/anie.202013171] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Indexed: 12/24/2022]
Abstract
Pickering emulsion systems have emerged as platforms for the synthesis of organic molecules in biphasic biocatalysis. Herein, the catalytic performance was evaluated for biotransformation using whole cells exemplified for the dehydration of n-octanaloxime to n-octanenitrile catalysed by an aldoxime dehydratase (OxdB) overexpressed in E. coli. This study was carried out in Pickering emulsions stabilised solely with silica particles of different hydrophobicity. We correlate, for the first time, the properties of the emulsions with the conversion of the reaction, thus gaining an insight into the impact of the particle wettability and particle concentration. When comparing two emulsions of different type with similar stability and droplet diameter, the oil-in-water (o/w) system displayed a higher conversion than the water-in-oil (w/o) system, despite the conversion in both cases being higher than that in a "classic" two-phase system. Furthermore, an increase in particle concentration prior to emulsification resulted in an increase of the interfacial area and hence a higher conversion.
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Affiliation(s)
| | - Lukas Schober
- Faculty of ChemistryBielefeld UniversityUniversitätsstrasse 2533615BielefeldGermany
| | - Alessa Hinzmann
- Faculty of ChemistryBielefeld UniversityUniversitätsstrasse 2533615BielefeldGermany
| | - Harald Gröger
- Faculty of ChemistryBielefeld UniversityUniversitätsstrasse 2533615BielefeldGermany
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18
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Dems D, Freeman R, Riker KD, Coradin T, Stupp SI, Aimé C. Multivalent Clustering of Adhesion Ligands in Nanofiber-Nanoparticle Composites. Acta Biomater 2021; 119:303-311. [PMID: 33171314 DOI: 10.1016/j.actbio.2020.11.009] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/17/2020] [Accepted: 11/04/2020] [Indexed: 02/07/2023]
Abstract
Because the positioning and clustering of biomolecules within the extracellular matrix dictates cell behaviors, the engineering of biomaterials incorporating bioactive epitopes with spatial organization tunable at the nanoscale is of primary importance. Here we used a highly modular composite approach combining peptide amphiphile (PA) nanofibers and silica nanoparticles, which are both easily functionalized with one or several bioactive signals. We show that the surface of silica nanoparticles allows the clustering of RGDS bioactive signals leading to improved adhesion and spreading of fibroblast cells on composite hydrogels at an epitope concentration much lower than in PA-only based matrices. Most importantly, by combining the two integrin-binding sequences RGDS and PHSRN on nanoparticle surfaces, we improved cell adhesion on the PA nanofiber/particle composite hydrogels, which is attributed to synergistic interactions known to be effective only for peptide intermolecular distance of ca. 5 nm. Such composites with soft and hard nanostructures offer a strategy for the design of advanced scaffolds to display multiple signals and control cell behavior.
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Affiliation(s)
- Dounia Dems
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75252 Paris cedex 05, France
| | - Ronit Freeman
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, USA.; Department of Applied Physical Sciences, University of North Carolina, 121 South Rd, Chapel Hill, North Carolina, 27514, United States
| | - Kyle D Riker
- Department of Applied Physical Sciences, University of North Carolina, 121 South Rd, Chapel Hill, North Carolina, 27514, United States
| | - Thibaud Coradin
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75252 Paris cedex 05, France
| | - Samuel I Stupp
- Simpson Querrey Institute, Northwestern University, 303 East Superior Street, Chicago, Illinois 60611, USA.; Department of Materials and Science & Engineering; Department of Chemistry; Department of Biomedical Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States; Department of Medicine, Northwestern University, 676 North St. Clair Street, Chicago, Illinois 60611, United States
| | - Carole Aimé
- Sorbonne Université, CNRS, Collège de France, Laboratoire de Chimie de la Matière Condensée de Paris, 4 place Jussieu, 75252 Paris cedex 05, France.
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19
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Zhang C, Xu J, Chen Y. Preparation of Monolayer Photonic Crystals from Ag Nanobulge-Deposited SiO 2 Particles as Substrates for Reproducible SERS Assay of Trace Thiol Pesticide. Nanomaterials (Basel) 2020; 10:E1205. [PMID: 32575646 DOI: 10.3390/nano10061205] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 01/31/2023]
Abstract
Surface-enhanced Raman scattering (SERS) greatly increases the detection sensitivity of Raman scattering. However, its real applications are often degraded due to the unrepeatable preparation of SERS substrates. Herein presented is a very facile and cost-effective method to reproducibly produce a novel type of SERS substrate, a monolayer photonic crystal (PC). With a building block of laboratory-prepared monodisperse SiO2 particles deposited with space-tunable silver nanobulges (SiO2@nAg), a PC substrate was first assembled at the air-water interface through needle tip flowing, then transferred onto a silicon slide by a pulling technique. The transferred monolayer PCs were characterized by SEM and AFM to have a hexagonal close-packed lattice. They could increase Raman scattering intensity by up to 2.2 × 107-fold, as tested with p-aminothiophenol. The relative standard deviations were all below 5% among different substrates or among different locations on the same substrate. The excellent reproducibility was ascribed to the highly ordered structure of PCs, while the very high sensitivity was attributed to the strong hotspot effect caused by the appropriately high density of nanobulges deposited on SiO2 particles and by a closed lattice. The PC substrates were validated to be applicable to the SERS assay of trace thiol pesticides. Thiram pesticide is an example determined in apple juice samples at a concentration 102-fold lower than the food safety standard of China. This method is extendable to the analysis of other Raman-active thiol chemicals in different samples, and the substrate preparation approach can be modified for the fabrication of more PC substrates from other metallic nanobulge-deposited particles rather than silica only.
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20
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Chen TH, Huang BY, Kuo CT. Position Dependence of Emission Wavelength of a SiO 2 Colloidal Photonic-Crystal Laser. Polymers (Basel) 2020; 12:polym12040802. [PMID: 32260082 PMCID: PMC7240537 DOI: 10.3390/polym12040802] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Revised: 03/12/2020] [Accepted: 03/23/2020] [Indexed: 11/17/2022] Open
Abstract
In this paper, a wavelength tunable colloidal-crystal laser with monodispersed silica particles was demonstrated. Silica particles were synthesized through the modified Stöber process and self-assembled into the colloidal photonic-crystal structure, which was then used to form the optic cavity of a wavelength tunable laser device. Due to Bragg’s diffraction of the colloidal photonic-crystal and the coffee ring effect, the forbidden energy gap of light varied with different lattice sizes at different positions of the colloidal photonic-crystal. When the pumping pulsed laser irradiated on the gain medium of the sample, the fluorescence was restricted and enhanced by the colloidal photonic-crystal. Lasing emission with a single peak occurred when the energy of the pumping laser exceeded the threshold energy. The threshold energy and the full-width at half-maximum (FWHM) of the proposed laser were 7.63 µJ/pulse and 2.88 nm, respectively. Moreover, the lasing wavelength of the colloidal photonic-crystal laser could be tuned from 604 nm to 594 nm, corresponding to the various positions in the sample due to the coffee ring effect.
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Affiliation(s)
- Ting-Hui Chen
- Department of Physics, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (T.-H.C.); (B.-Y.H.)
| | - Bing-Yau Huang
- Department of Physics, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (T.-H.C.); (B.-Y.H.)
| | - Chie-Tong Kuo
- Department of Physics, National Sun Yat-sen University, Kaohsiung 804, Taiwan; (T.-H.C.); (B.-Y.H.)
- Department of Optometry, Shu-Zen Junior College of Medicine and Management, Kaohsiung 821, Taiwan
- Innovation Incubation Center, Shu-Zen Junior College of Medicine and Management, Kaohsiung 821, Taiwan
- Correspondence:
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21
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Santana PT, Luna-Gomes T, Rangel-Ferreira MV, Tamura AS, Da Graça CLAL, Machado MN, Zin WA, Takiya CM, Faffe DS, Coutinho-Silva R. P2Y 12 Receptor Antagonist Clopidogrel Attenuates Lung Inflammation Triggered by Silica Particles. Front Pharmacol 2020; 11:301. [PMID: 32256366 PMCID: PMC7093325 DOI: 10.3389/fphar.2020.00301] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Accepted: 02/28/2020] [Indexed: 11/15/2022] Open
Abstract
Silicosis is an occupational lung disease caused by inhalation of silica particles. It is characterized by intense lung inflammation, with progressive and irreversible fibrosis, leading to impaired lung function. Purinergic signaling modulates silica-induced lung inflammation and fibrosis through P2X7 receptor. In the present study, we investigate the role of P2Y12, the G-protein-coupled subfamily prototype of P2 receptor class in silicosis. To that end, BALB/c mice received an intratracheal injection of PBS or silica particles (20 mg), without or with P2Y12 receptor blockade by clopidogrel (20 mg/kg body weight by gavage every 48 h) - groups CTRL, SIL, and SIL + Clopi, respectively. After 14 days, lung mechanics were determined by the end-inflation occlusion method. Lung histology was analyzed, and lung parenchyma production of nitric oxide and cytokines (IL-1β, IL-6, TNF-α, and TGF-β) were determined. Silica injection reduced animal survival and increased all lung mechanical parameters in relation to CTRL, followed by diffuse lung parenchyma inflammation, increased neutrophil infiltration, collagen deposition and increased pro-inflammatory and pro-fibrogenic cytokine secretion, as well as increased nitrite production. Clopidogrel treatment prevented silica-induced changes in lung function, and significantly reduced lung inflammation, fibrosis, as well as cytokine and nitrite production. These data suggest that inhibition of P2Y12 signaling improves silica-induced lung inflammation, preventing lung functional changes and mortality. Our results corroborate previous observations of silica-induced lung changes and expand the understanding of purinergic signaling in this process.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Robson Coutinho-Silva
- Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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22
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Ferreira TPT, Lima JGME, Farias-Filho FA, Jannini de Sá YAP, de Arantes ACS, Guimarães FV, Carvalho VDF, Hogaboam C, Wallace J, Martins MA, Silva PMRE. Intranasal Flunisolide Suppresses Pathological Alterations Caused by Silica Particles in the Lungs of Mice. Front Endocrinol (Lausanne) 2020; 11:388. [PMID: 32625168 PMCID: PMC7311565 DOI: 10.3389/fendo.2020.00388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Accepted: 05/15/2020] [Indexed: 12/19/2022] Open
Abstract
Silicosis is an occupational disease triggered by the inhalation of fine particles of crystalline silica and characterized by inflammation and scarring in the form of nodular lesions in the lungs. In spite of the therapeutic arsenal currently available, there is no specific treatment for the disease. Flunisolide is a potent corticosteroid shown to be effective for controlling chronic lung inflammatory diseases. In this study, the effect of flunisolide on silica-induced lung pathological changes in mice was investigated. Swiss-Webster mice were injected intranasally with silica particles and further treated with flunisolide from day 21 to 27 post-silica challenge. Lung function was assessed by whole body invasive plethysmography. Granuloma formation was evaluated morphometrically, collagen deposition by Picrus sirius staining and quantitated by Sircol. Chemokines and cytokines were evaluated using enzyme-linked immunosorbent assay. The sensitivity of lung fibroblasts was also examined in in vitro assays. Silica challenge led to increased leukocyte numbers (mononuclear cells and neutrophils) as well as production of the chemokine KC/CXCL-1 and the cytokines TNF-α and TGF-β in the bronchoalveolar lavage. These alterations paralleled to progressive granuloma formation, collagen deposition and impairment of lung function. Therapeutic administration of intranasal flunisolide inhibited granuloma and fibrotic responses, noted 28 days after silica challenge. The upregulation of MIP-1α/CCL-3 and MIP-2/CXCL-2 and the cytokines TNF-α and TGF-β, as well as deposition of collagen and airway hyper-reactivity to methacholine were shown to be clearly sensitive to flunisolide, as compared to silica-challenge untreated mice. Additionally, flunisolide effectively suppressed the responses of proliferation and MCP-1/CCL-2 production from IL-13 stimulated lung fibroblasts from silica- or saline-challenged mice. In conclusion, we report that intranasal treatment with the corticosteroid flunisolide showed protective properties on pathological features triggered by silica particles in mice, suggesting that the compound may constitute a promising strategy for the treatment of silicosis.
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Affiliation(s)
| | | | | | | | | | | | | | - Cory Hogaboam
- Department of Medicine, Cedars-Sinai Medical Center, Women's Guild Lung Institute, Los Angeles, CA, United States
| | - John Wallace
- Departments of Physiology and Pharmacology, and Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Marco Aurélio Martins
- Laboratory of Inflammation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Patrícia Machado Rodrigues e Silva
- Laboratory of Inflammation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
- *Correspondence: Patrícia Machado Rodrigues e Silva
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23
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Tam SYJ, Coller JK, Wignall A, Gibson RJ, Khatri A, Barbé C, Bowen JM. Intestinal accumulation of silica particles in a rat model of dextran sulfate sodium-induced colitis. Ann Gastroenterol 2019; 32:584-592. [PMID: 31700235 PMCID: PMC6826066 DOI: 10.20524/aog.2019.0411] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 07/18/2019] [Indexed: 11/28/2022] Open
Abstract
Background: Ulcerative colitis (UC) is a lifelong inflammatory bowel disease characterized by periods of intense colonic inflammation leading to debilitating symptoms. Delivery methods of current UC treatments are suboptimal and associated with side effects. Silica particles are a potential alternative delivery method for UC therapeutics, given their promising drug-loading and safety profiles. However, it is unknown whether silica particles preferably accumulate at sites of colonic inflammation. This study aimed to correlate silica particle accumulation with colonic inflammation in a rat UC model. Methods: Albino Wistar rats received 4.5% dextran sulfate sodium (DSS) in drinking water (n=6) for 7 days to induce UC. Control rats (n=6) received drinking water only. UC activity was assessed daily using disease activity index. All rats were orally gavaged with silica particles labeled with Alexa-633 tags on day 9, followed by imaging at 3, 6, and 24 h. Silica particle distribution and accumulation were examined using biophotonic imaging, confocal microscopy and fluorescent spectrophotometry. Rats were killed on day 10, with jejunum, ileum and colon collected for histopathological scoring and quantification of fluorescence. Results: Rats treated with DSS had significantly higher UC disease activity (P=0.033) and colonic histopathological scores (P=0.0087) compared to controls. No statistically significant between-group differences in silica particle accumulation were seen on live imaging or tissue analysis. Conclusions: No correlation was seen between silica particle accumulation and colonic inflammation. However to draw clear conclusions, further research is required to establish the potential of silica particles as a UC-targeted delivery method.
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Affiliation(s)
- Shu Yie Janine Tam
- Discipline of Physiology, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia (Shu Yie Janine Tam, Anthony Wignall, Joanne M. Bowen)
| | - Janet K Coller
- Discipline of Pharmacology, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia (Janet K. Coller)
| | - Anthony Wignall
- Discipline of Physiology, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia (Shu Yie Janine Tam, Anthony Wignall, Joanne M. Bowen).,School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia (Anthony Wignall)
| | - Rachel J Gibson
- Discipline of Anatomy, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia (Rachel J. Gibson).,Division of Health Sciences, University of South Australia, Adelaide, South Australia, Australia (Rachel J. Gibson)
| | - Aparajita Khatri
- Ceramisphere Pty Ltd, College Street Gladesville, New South Wales (Aparajita Khatri, Chris Barbé), Australia This work was a collaborative endeavor between the University of Adelaide and Ceramisphere Pty Ltd
| | - Chris Barbé
- Ceramisphere Pty Ltd, College Street Gladesville, New South Wales (Aparajita Khatri, Chris Barbé), Australia This work was a collaborative endeavor between the University of Adelaide and Ceramisphere Pty Ltd
| | - Joanne M Bowen
- Discipline of Physiology, Adelaide Medical School, University of Adelaide, Adelaide, South Australia, Australia (Shu Yie Janine Tam, Anthony Wignall, Joanne M. Bowen)
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24
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Cheeveewattanagul N, Tien TT, Rijiravanich P, Surareungchai W, Somasundrum M. Photostable methylene blue-loaded silica particles used as label for immunosorbent assay of Salmonella Typhimurium. Biotechnol Appl Biochem 2019; 66:842-849. [PMID: 31228877 DOI: 10.1002/bab.1796] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 02/04/2019] [Accepted: 06/21/2019] [Indexed: 12/27/2022]
Abstract
Salmonella Typhimurium is a major cause of food poisoning. To solve the limitations of the routine enzyme linked immunosorbent assay such as laborious assay procedure, lack of long-term enzyme stability, and insufficient sensitivity, we provided a non-enzymatic colorimetric immunosorbent assay platform to overcome these problems. The highly photostable redox dye particles was constructed by silica particles (diameter = 598 ± 14.4 nm) loaded with methylene blue (Si-MB) and applied to be a label for immunoassay of S. Typhimurium. The sandwich assay format involved incubation of an analyte in a microplate wells modified with monoclonal anti-Salmonella, followed by exposure to a polyclonal anti-Salmonella/Si-MB bioconjugate and then measurement of absorbance at 598 nm. The platform had an assay time of 20 min, could detect heat-killed Salmonella with a limit of detection of 48 CFU mL-1 , and gave good recoveries in milk. The labels could be stored at 4 °C for 70 days without any deterioration.
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Affiliation(s)
- Nopchulee Cheeveewattanagul
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkhuntien Campus, Bangkok, Thailand
| | - Tran Thanh Tien
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkhuntien Campus, Bangkok, Thailand.,Department of Veterinary Biosciences, Faculty of Animal Science and Veterinary Medicine, Nong Lam University, Ho Chi Minh City, Vietnam
| | - Patsamon Rijiravanich
- Biosciences and System Biology Team, Biochemical Engineering and System Biology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency at KMUTT, Bangkhuntien Campus, Bangkok, Thailand
| | - Werasak Surareungchai
- School of Bioresources and Technology, King Mongkut's University of Technology Thonburi (KMUTT), Bangkhuntien Campus, Bangkok, Thailand.,Nanoscience and Nanotechnology Graduate Program, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkhuntien Campus, Bangkok, Thailand
| | - Mithran Somasundrum
- Biosciences and System Biology Team, Biochemical Engineering and System Biology Research Group, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency at KMUTT, Bangkhuntien Campus, Bangkok, Thailand
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25
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Seker A, Arslan B, Chen S. Recovery of Polyphenols from Grape Pomace Using Polyethylene Glycol (PEG)-Grafted Silica Particles and PEG-Assisted Cosolvent Elution. Molecules 2019; 24:E2199. [PMID: 31212800 DOI: 10.3390/molecules24122199] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/04/2019] [Accepted: 06/11/2019] [Indexed: 01/07/2023] Open
Abstract
Adsorption on a functionalized surface can be an effective way of purifying polyphenols from complex plant extracts. Polymeric resins that rely on hydrophobic interactions suffer from low selectivity, weak affinity towards polyphenols, and lack tunability therefore making the purification of polyphenols less efficient. In this study, a purification process for the recovery of polyphenols from grape pomace extract was successfully developed using hydrogen bonding affinity ligands grafted on silica particles and PEG-assisted elution solvents. Bare silica (SiO2) and polyethylene glycol (mPEG)-grafted silica microparticles with molecular weights of 2000 and 5000 were tested to determine their polyphenol binding and release characteristics. Functionalizing the surface of bare silica with mPEG ligands increased the adsorption capacity by 7.1- and 11.4-fold for mPEG-2000 and mPEG-5000 compared to bare silica particles, respectively. This was likely due to the introduction of more polyphenol binding sites with mPEG functionalization. Altering the molecular weight (MW) of mPEG grafted on silica surfaces provided tunability in the adsorption capacity. A complete recovery of polyphenols (~99.9%) from mPEG-grafted silica particles was achieved by utilizing PEG–ethanol or PEG–water cosolvent systems. Recovered polyphenols showed up to ~12-fold antioxidant activity compared to grape pomace extract. This study demonstrates that mPEG-grafted silica particles and elution of polyphenols with PEG cosolvents can potentially be used for large-scale purification of polyphenols from complex plant extracts and simplify the use of polyphenols, as PEG facilitates remarkable solvation and is an ideal medium for the final formulation of polyphenols.
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26
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Ermatov T, Petrov YV, German SV, Zanishevskaya AA, Shuvalov AA, Аtkin V, Zakharevich A, Khlebtsov BN, Skibina JS, Ginzburg P, Noskov RE, Tuchin VV, Gorin DA. Microstructured Optical Waveguide-Based Endoscopic Probe Coated with Silica Submicron Particles. Materials (Basel) 2019; 12:E1424. [PMID: 31052408 DOI: 10.3390/ma12091424] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 04/24/2019] [Accepted: 04/28/2019] [Indexed: 11/17/2022]
Abstract
Microstructured optical waveguides (MOW) are of great interest for chemical and biological sensing. Due to the high overlap between a guiding light mode and an analyte filling of one or several fiber capillaries, such systems are able to provide strong sensitivity with respect to variations in the refractive index and the thickness of filling materials. Here, we introduce a novel type of functionalized MOWs whose capillaries are coated by a layer-by-layer (LBL) approach, enabling the alternate deposition of silica particles (SiO2) at different diameters—300 nm, 420 nm, and 900 nm—and layers of poly(diallyldimethylammonium chloride) (PDDA). We demonstrate up to three covering bilayers consisting of 300-nm silica particles. Modifications in the MOW transmission spectrum induced by coating are measured and analyzed. The proposed technique of MOW functionalization allows one to reach novel sensing capabilities, including an increase in the effective sensing area and the provision of a convenient scaffold for the attachment of long molecules such as proteins.
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27
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Huang K, Nitin N. Antimicrobial Particle-Based Novel Sanitizer for Enhanced Decontamination of Fresh Produce. Appl Environ Microbiol 2019; 85:e02599-18. [PMID: 30770406 DOI: 10.1128/AEM.02599-18] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 02/09/2019] [Indexed: 11/20/2022] Open
Abstract
Microbial food safety of raw or minimally processed fresh produce is a significant challenge. The current sanitation processes are effective for inactivation of bacteria in wash water but have limited efficacy (<2 log/g reduction) for inactivation of microbes on the surfaces of fresh produce. This study demonstrates a novel concept to enhance effectiveness of chlorine using a particle-based sanitizer to improve decontamination of fresh produce. In this concept, enhanced effectiveness is achieved by localized high concentration of chlorine bound to the surfaces of silica particles and improved surface contact of microparticles with the produce surface using mechanical shear during a washing process. The results of this study demonstrate that 500 ppm active chlorine can be bound to the surfaces of modified silica particles. These modified particles maintain over 90% of their initial chlorine content during extended storage in aqueous solution and provide improved inactivation of both Escherichia coli O157:H7, Listeria innocua, and Pseudomonas fluorescens in the presence of organic content in contrast to conventional chlorine sanitizer. The modified particles exhibit effective sanitation of fresh produce (>5-log reduction) in the presence of relatively high organic content (chemical oxygen demand of 500 mg/liter), demonstrating a potential to address a significant unmet need to improve fresh produce sanitation. The particle-based sanitizer had no significant effect on the quality of fresh lettuce.IMPORTANCE The limitation of current sanitation processes for inactivation of microbes on the surfaces of fresh produce is due to nonspecific consumption of sanitizers by reactions with the food matrix and complexity of surface chemistries and structural features of produce surfaces. This study demonstrates a novel approach to enhance sanitation effectiveness of fresh produce using a particle-based sanitizer. The particle-based sanitizer concept provides localized high concentration delivery of chlorine to the surfaces of fresh produce and enables more than 5 logs of inactivation of inoculated bacteria on fresh produce surfaces without significant changes in produce quality. The results of this study illustrate the potential of this approach to address the unmet need for improving sanitation of fresh produce. Further validation of this approach using a scaled-up produce washing system will enable commercialization of this novel concept.
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28
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Ueno K, Negishi H, Okuno T, Tawarayama H, Ishikawa S, Miyamoto M, Uemiya S, Oumi Y. Effects of Silica-Particle Coating on a Silica Support for the Fabrication of High-Performance Silicalite-1 Membranes by Gel-Free Steam-Assisted Conversion. Membranes (Basel) 2019; 9:E46. [PMID: 30939830 DOI: 10.3390/membranes9040046] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/26/2019] [Accepted: 03/27/2019] [Indexed: 11/17/2022]
Abstract
Silicalite-1 membranes with high pervaporation performance were prepared successfully on a silica-particle-coated tubular silica support using a gel-free steam-assisted conversion (SAC) method. The effects of the silica-particle layer formed on the top surface of the silica support and the physical properties of the silica particles themselves on the membrane-formation process were investigated. The silica particles coated served as the additional silica source for growing the silicalite-1 seed crystal layer into the silicalite-1 membrane. As a result, it was possible to form a dense and continuous membrane even under gel-free conditions. Furthermore, it was found that the properties of the silica particles, such as their primary particle diameter, had a determining effect on their solubility during the steam treatment, that is, on the supply rate of the silica source. The silicalite-1 membrane obtained using the spherical-silica-particle-coated support had an approximately 9-μm-thick separation layer and showed very high pervaporation performance, exhibiting a separation factor of 105 and a flux of 3.72 kg m−2 h−1 for a 10 wt % ethanol/water mixture at 323 K. Thus, the gel-free SAC method can be used with a silica support coated with silica particles to readily prepare high-performance membranes without producing any chemical waste.
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29
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Kobes JE, Georgiev GI, Louis AV, Calderon IA, Yoshimaru ES, Klemm LM, Cromey DW, Khalpey Z, Pagel MD. A Comparison of Iron Oxide Particles and Silica Particles for Tracking Organ Recellularization. Mol Imaging 2018; 17:1536012118787322. [PMID: 30039729 PMCID: PMC6058421 DOI: 10.1177/1536012118787322] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Reseeding of decellularized organ scaffolds with a patient’s own cells has promise for eliminating graft versus host disease. This study investigated whether ultrasound imaging or magnetic resonance imaging (MRI) can track the reseeding of murine liver scaffolds with silica-labeled or iron-labeled liver hepatocytes. Mesoporous silica particles were created using the Stöber method, loaded with Alexa Flour 647 fluorophore, and conjugated with protamine sulfate, glutamine, and glycine. Fluorescent iron oxide particles were obtained from a commercial source. Liver cells from donor mice were loaded with the silica particles or iron oxide particles. Donor livers were decellularized and reperfused with silica-labeled or iron-labeled cells. The reseeded livers were longitudinally analyzed with ultrasound imaging and MRI. Liver biopsies were imaged with confocal microscopy and scanning electron microscopy. Ultrasound imaging had a detection limit of 0.28 mg/mL, while MRI had a lower detection limit of 0.08 mg/mL based on particle weight. The silica-loaded cells proliferated at a slower rate compared to iron-loaded cells. Ultrasound imaging, MRI, and confocal microscopy underestimated cell numbers relative to scanning electron microscopy. Ultrasound imaging had the greatest underestimation due to coarse resolution compared to the other imaging modalities. Despite this underestimation, both ultrasound imaging and MRI successfully tracked the longitudinal recellularization of liver scaffolds.
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Affiliation(s)
- Joseph E Kobes
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA.,2 Department of Chemistry and Life Science, United States Military Academy, West Point, NY, USA
| | - George I Georgiev
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Anthony V Louis
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Isen A Calderon
- 4 Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA
| | - Eriko S Yoshimaru
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA
| | - Louie M Klemm
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Douglas W Cromey
- 5 University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Zain Khalpey
- 3 Department of Surgery, University of Arizona, Tucson, AZ, USA
| | - Mark D Pagel
- 1 Department of Biomedical Engineering, University of Arizona, Tucson, AZ, USA.,4 Department of Chemistry and Biochemistry, University of Arizona, Tucson, AZ, USA.,5 University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
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Abstract
Composite films consisting of wrinkles on top of the elastomeric poly(dimethylsiloxane) film and a thin layer of silica particles embedded at the bottom is prepared as on-demand mechanoresponsive smart windows. By carefully varying the wrinkle geometry, silica particle size, and stretching strain, different initial optical states and a large degree of optical transmittance change in the visible to near infrared range with a relatively small strain (as small as 10%) is achieved. The 10% pre-strain sample has shallow wrinkles with a low amplitude and shows moderate transmittance (60.5%) initially and the highest transmittance of 86.4% at 550 nm when stretched at the pre-strain level. Stretching beyond the pre-strain level leads to a drastic decrease of the transmittance at 550 nm, 39.7% and 70.8% with an additional 10% and 30% strain, respectively. The large drop of optical transmittance is the result of combined effects from the formation of secondary wrinkles and nanovoids generated around the particles. The 20% pre-strain sample has wrinkles with a moderate amplitude, showing 36.9% transmittance in the initial state, and the highest transmittance of 71.5% at 550 nm when stretched to the pre-strain level. Further stretching leads to increased opacity similar to that seen from the 10% pre-strain sample.
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Affiliation(s)
- Hye-Na Kim
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA
| | - Dengteng Ge
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Institute of Functional Materials, Donghua University, Shanghai, 201620, P. R. China
| | - Elaine Lee
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA
- Engineering Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA, 94550, USA
| | - Shu Yang
- Department of Materials Science and Engineering, University of Pennsylvania, 3231 Walnut Street, Philadelphia, PA, 19104, USA
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31
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Bourebrab MA, Durand GG, Taylor A. Development of Highly Repellent Silica Particles for Protection of Hemp Shiv Used as Insulation Materials. Materials (Basel) 2017; 11:E4. [PMID: 29267195 DOI: 10.3390/ma11010004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 12/15/2017] [Accepted: 12/19/2017] [Indexed: 11/17/2022]
Abstract
New bio-materials have recently gained interest for use in insulation panels in walls, but wider adoption by the building industry is hindered by their intrinsic properties. The fact that such materials are mainly composed of cellulose makes them combustible, and their hydrophilic surface presents a high water uptake, which would lead to faster biodegradation. A hydrophobic treatment with silica particles was successfully synthesised via Stöber process, characterised, and deposited on hemp shiv. The surface of hemp shiv coated several times with 45 and 120 nm particles were uniformly covered, as well as extensively water repellent. Those samples could withstand in humidity chamber without loss of their hydrophobic property and no sign of mould growth after 72 h of exposure.
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32
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Fan H, Wang J, Meng Q, Tian Y, Xu X, Jin Z. Photoirradiation surface molecularly imprinted polymers for the separation of 6-O-α-d-maltosyl-β-cyclodextrin. J Sep Sci 2017; 40:4653-4660. [PMID: 28985024 DOI: 10.1002/jssc.201700808] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 07/25/2017] [Revised: 10/02/2017] [Accepted: 10/02/2017] [Indexed: 12/11/2022]
Abstract
Photoirradiation surface molecularly imprinted polymers for the separation of 6-O-α-d-maltosyl-β-cyclodextrin were synthesized using functionalized silica as a matrix, 4-(phenyldiazenyl)phenol as a light-sensitive monomer, and 6-O-α-d-maltosyl-β-cyclodextrin as a template. Fourier transform infrared spectroscopy results indicated that 4-(phenyldiazenyl)phenol was grafted onto the surface of functionalized silica. The obtained imprinted polymers exhibited specific recognition toward 6-O-α-d-maltosyl-β-cyclodextrin. Equilibrium binding experiments showed that the photoirradiation surface molecularly imprinted polymers obtained the maximum adsorption amount of 6-O-α-d-maltosyl-β-cyclodextrin at 20.5 mg/g. In binding kinetic experiments, the adsorption reached saturation within 2 h with binding capacity of 72.8%. The experimental results showed that the adsorption capacity and selectivity of imprinted polymers were effective for the separation of 6-O-α-d-maltosyl-β-cyclodextrin, indicating that imprinted polymers could be used to isolate 6-O-α-d-maltosyl-β-cyclodextrin from a conversion mixture containing β-cyclodextrin and maltose. The results showed that the imprinted polymers prepared by this method were very promising for the selective separation of 6-O-α-d-maltosyl-β-cyclodextrin.
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Affiliation(s)
- Haoran Fan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Jinpeng Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Qingran Meng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Yaoqi Tian
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Xueming Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.,School of Food Science and Technology, Jiangnan University, Wuxi, China.,Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi, China
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Seidel C, Kirsch A, Fontana C, Visvikis A, Remy A, Gaté L, Darne C, Guichard Y. Epigenetic changes in the early stage of silica-induced cell transformation. Nanotoxicology 2017; 11:923-935. [PMID: 28958182 DOI: 10.1080/17435390.2017.1382599] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Revised: 08/31/2017] [Accepted: 09/18/2017] [Indexed: 01/03/2023]
Abstract
The increasing use of nanomaterials in numerous domains has led to growing concern about their potential toxicological properties, and the potential risk to human health posed by silica nanoparticles remains under debate. Recent studies proposed that these particles could alter gene expression through the modulation of epigenetic marks, and the possible relationship between particle exposure and these mechanisms could represent a critical factor in carcinogenicity. In this study, using the Bhas 42 cell model, we compare the effects of exposure to two transforming particles, a pyrogenic amorphous silica nanoparticle NM-203 to those of the crystalline silica particle Min-U-Sil® 5. Short-term treatment by Min-U-Sil® 5 decreased global DNA methylation and increased the expression of the two de novo DNMTs, DNMT3a and DNMT3b. NM-203 treatment affected neither the expression of these enzymes nor DNA methylation. Moreover, modified global histone H4 acetylation status and HDAC protein levels were observed only in the Min-U-Sil® 5-treated cells. Finally, both types of particle treatment induced strong c-Myc expression in the early stage of cell transformation and this correlated with enrichment in RNA polymerase II as well as histone active marks on its promoter. Lastly, almost all parameters that were modulated in the early stage were restored in transformed cells suggesting their involvement mainly in the first steps of cell transformation.
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Affiliation(s)
- Carole Seidel
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Anaïs Kirsch
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Caroline Fontana
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Athanase Visvikis
- b Ingénierie Moléculaire et Physiopathologie Articulaire (IMoPA) , UMR 7365 CNRS-Université de Lorraine, Biopôle, Campus Biologie Santé , Vandoeuvre-lès-Nancy , France
| | - Aurélie Remy
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Laurent Gaté
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Christian Darne
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
| | - Yves Guichard
- a Département Toxicologie et Biométrologie , Institut National de Recherche et Sécurité (INRS) , Vandoeuvre-lès-Nancy Cedex , France
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Wittig A, Gehrke H, Del Favero G, Fritz EM, Al-Rawi M, Diabaté S, Weiss C, Sami H, Ogris M, Marko D. Amorphous Silica Particles Relevant in Food Industry Influence Cellular Growth and Associated Signaling Pathways in Human Gastric Carcinoma Cells. Nanomaterials (Basel) 2017; 7:E18. [PMID: 28336852 DOI: 10.3390/nano7010018] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Revised: 12/30/2016] [Accepted: 01/04/2017] [Indexed: 01/12/2023]
Abstract
Nanostructured silica particles are commonly used in biomedical and biotechnical fields, as well as, in cosmetics and food industry. Thus, their environmental and health impacts are of great interest and effects after oral uptake are only rarely investigated. In the present study, the toxicological effects of commercially available nano-scaled silica with a nominal primary diameter of 12 nm were investigated on the human gastric carcinoma cell line GXF251L. Besides the analysis of cytotoxic and proliferative effects and the comparison with effects of particles with a nominal primary diameter of 200 nm, emphasis was also given to their influence on the cellular epidermal growth factor receptor (EGFR) and mitogen-activated protein kinases (MAPK) signaling pathways—both of them deeply involved in the regulation of cellular processes like cell cycle progression, differentiation or proliferation. The investigated silica nanoparticles (NPs) were found to stimulate cell proliferation as measured by microscopy and the sulforhodamine B assay. In accordance, the nuclear level of the proliferation marker Ki-67 was enhanced in a concentration-dependent manner. At high particle concentrations also necrosis was induced. Finally, silica NPs affected the EGFR and MAPK pathways at various levels dependent on concentration and time. However, classical activation of the EGFR, to be reflected by enhanced levels of phosphorylation, could be excluded as major trigger of the proliferative stimulus. After 45 min of incubation the level of phosphorylated EGFR did not increase, whereas enhanced levels of total EGFR protein were observed. These results indicate interference with the complex homeostasis of the EGFR protein, whereby up to 24 h no impact on the transcription level was detected. In addition, downstream on the level of the MAP kinases ERK1/2 short term incubation appeared to affect total protein levels without clear increase in phosphorylation. Depending on the concentration range, enhanced levels of ERK1/2 phosphorylation were only observed after 24 h of incubation. Taken together, the present study demonstrates the potential of the tested silica particles to enhance the growth of gastric carcinoma cells. Although interference with the EGFR/MAPK cascade is observed, additional mechanisms are likely to be involved in the onset of the proliferative stimulus.
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35
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Wang A, Yang Y, Qi Y, Qi W, Fei J, Ma H, Zhao J, Cui W, Li J. Fabrication of Mesoporous Silica Nanoparticle with Well-Defined Multicompartment Structure as Efficient Drug Carrier for Cancer Therapy in Vitro and in Vivo. ACS Appl Mater Interfaces 2016; 8:8900-8907. [PMID: 26998895 DOI: 10.1021/acsami.5b12031] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Vaterite particles are composed of particulate CaCO3 nanoparticles, which offer an ideal platform to synthesize architectures with hierarchical structure. Herein we show that mesoporous silica particles with well-defined multicompartment structure are fabricated by employing vaterite particles as templates. The obtained silica particles inherited the structure feature of vaterite and had excellent biocompatibility and biodegradability. Moreover, the silica particles were established as an efficient anticancer drugs carrier compared with hollow silica particles, which could be applied in cancer therapy in vitro and in vivo. The silica particles obtained here offer a cheap, facile, environmentally friendly avenue to assembly of hierarchical drugs carriers.
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Affiliation(s)
- Anhe Wang
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology , Beijing 100190, China
| | - Yang Yang
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology , Beijing 100190, China
| | - Yanfei Qi
- School of Public Health, Jilin University , Changchun 130021, China
| | - Wen Qi
- School of Public Health, Jilin University , Changchun 130021, China
| | - Jinbo Fei
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, China
| | - Hongchao Ma
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, China
| | - Jie Zhao
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, China
| | - Wei Cui
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, China
| | - Junbai Li
- CAS Key Laboratory for Biological Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology , Beijing 100190, China
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Colloid and Interface Science, Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, China
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Sheng Y, Sun G, Wu J, Ma G, Ngai T. Silica-based liquid marbles as microreactors for the silver mirror reaction. Angew Chem Int Ed Engl 2015; 54:7012-7. [PMID: 25924973 DOI: 10.1002/anie.201500010] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [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: 01/02/2015] [Revised: 03/11/2015] [Indexed: 01/05/2023]
Abstract
Little attention has been paid to the participation of the shell of silica-particle-based liquid marbles and their influence on chemical reactions. The fabrication of liquid marbles with the encapsulating particle shells not only act as protecting layers to provide a confined environment, but also provide the reactive substrate surfaces to regulate the classical silver mirror reaction. Fabrication of silver mirrors with different morphologies was achieved by modifying particle surface properties, which could further lead to Janus liquid marbles. The different evaporation behavior of microreactors was demonstrated. Micrometer-sized silica particles were used for the preparation of monolayer-stabilized liquid marbles, which show great potential in fabricating Janus particles from superhydrophobic particles that are not attainable from Pickering emulsions.
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Affiliation(s)
- Yifeng Sheng
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong (China)
| | - Guanqing Sun
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong (China)
| | - Jie Wu
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190 (PR China)
| | - Guanghui Ma
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190 (PR China).
| | - To Ngai
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong (China). .,Shenzhen Research Institute, The Chinese University of Hong Kong; Department of Chemistry, The Chinese University of Hong Kong, Shenzhen, 518057 (PR China).
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Luo C, Ji X, Fan J, Hou Z, Wang T, Wu B, Ni C. Annexin A5 promotes macrophage activation and contributes to pulmonary fibrosis induced by silica particles. Toxicol Ind Health 2015; 32:1628-38. [PMID: 25757482 DOI: 10.1177/0748233715572744] [Citation(s) in RCA: 7] [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] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To investigate the contributions and underlying molecular mechanisms of annexin A5 toward silica-induced pulmonary fibrosis. METHODS Male C57BL/6 mice were randomly divided into three groups and instilled intratracheally with silica, saline, or air. Mice were euthanized at 3, 7, 14, or 28 days following treatment. Annexin A5 levels in serum and lung tissues were detected by enzyme-linked immunosorbant assay (ELISA) assays or Western blots. The association of annexin A5 levels with silica-induced lung fibrosis was further investigated in the macrophage cell line, RAW264.7. Following exposure of these cells to silica at a concentration of 200 μg/ml for 6 or 12 h, the expression levels of transforming growth factor β1 (TGF-β1), interleukin 1α (IL-1α), Fas ligand (FasL), and their downstream targets were evaluated by Western blots. Furthermore, annexin A5 and FasL were knocked down by small interfering ribonucleic acid (siRNA) and TGF-β1 secretion into the cell culture medium was measured by ELISA assays or Western blots. RESULTS Mice treated with silica demonstrated lung fibrosis at 28 days following exposure, whereas, in controls, only mild and transient inflammation was evident at day 3 and day 7 postinstillation and was not present at day 14. Furthermore, silica-exposed mice exhibited significantly (p < 0.05) elevated levels of annexin A5 in serum and lung tissues, relative to control groups. Consistent with these findings, silica exposure of RAW264.7 cells for 6 or 12 h, led to an annexin A5-dependent increase in the expression levels of TGF-β1, IL-1α, FasL, and their downstream target molecules. These silica-induced changes were reversed by siRNA-mediated knockdown of annexin A5, but downregulation of FasL led to increased annexin A5 expression and reduced levels of TGF-β1, IL-1α, and FasL downstream target molecules. CONCLUSIONS These findings define a role of annexin A5 in promoting macrophage activation via Fas/FasL pathways in silica-induced lung fibrosis.
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Affiliation(s)
- C Luo
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - X Ji
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - J Fan
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - Z Hou
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - T Wang
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - B Wu
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
| | - C Ni
- Department of Occupational Medicine and Environmental Health, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, People's Republic of China
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Moraes J, Ohno K, Maschmeyer T, Perrier S. Selective patterning of gold surfaces by core/shell, semisoft hybrid nanoparticles. Small 2015; 11:482-488. [PMID: 25223214 DOI: 10.1002/smll.201400345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2014] [Revised: 07/17/2014] [Indexed: 06/03/2023]
Abstract
The generation of patterned surfaces with well-defined nano- and microdomains is demonstrated by attaching core/shell, semisoft nanoparticles with narrow size distribution to microdomains of a gold-coated silicon wafer. Near monodisperse nanoparticles are prepared using reversible addition-fragmentation chain transfer (RAFT) polymerization, initiated from a silica surface, to prepare a polystyrene shell around a silica core. The particles are then used as-prepared, or after aminolysis of the terminal thiocarbonyl group of the polystyrene shell, to give thiol-terminated nanoparticles. When gold-coated silicon wafers are immersed into very dilute suspensions of these particles (as low as 0.004 wt%), both types of particles are shown to adhere to the gold domains. The thiolated particles adhere selectively to the gold microdomains, allowing for microdomain patterning, while particles that contain the trithiocarbonate functionality lead to a much more even coverage of the gold surface with fewer particle aggregations.
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Affiliation(s)
- John Moraes
- Key Centre for Polymers & Colloids, School of Chemistry, The University of Sydney, NSW, 2006, Australia
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39
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Du X, Qiao SZ. Dendritic silica particles with center-radial pore channels: promising platforms for catalysis and biomedical applications. Small 2015; 11:392-413. [PMID: 25367307 DOI: 10.1002/smll.201401201] [Citation(s) in RCA: 163] [Impact Index Per Article: 18.1] [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: 05/01/2014] [Revised: 07/19/2014] [Indexed: 05/07/2023]
Abstract
Dendritic silica micro-/nanoparticles with center-radial pore structures, a kind of newly created porous material, have attracted considerable attention owing to their unique open three-dimensional dendritic superstructures with large pore channels and highly accessible internal surface areas compared with conventional mesoporous silica nanoparticles (MSNs). They are very promising platforms for a variety of applications in catalysis and nanomedicine. In this review, their unique structural characteristics and properties are first analyzed, then novel and interesting synthesis methods associated with the possible formation mechanisms are summarized to provide material scientists some inspiration for the preparation of this kind of dendritic particles. Subsequently, a few examples of interesting applications are presented, mainly in catalysis, biomedicine, and other important fields such as for sacrificial templates and functional coatings. The review is concluded with an outlook on the prospects and challenges in terms of their controlled synthesis and potential applications.
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Affiliation(s)
- Xin Du
- School of Chemical Engineering, The University of Adelaide, Adelaide, SA5005, Australia
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40
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Tan A, Colliat-Dangus P, Whitby CP, Prestidge CA. Controlling the enzymatic digestion of lipids using hybrid nanostructured materials. ACS Appl Mater Interfaces 2014; 6:15363-71. [PMID: 25116477 DOI: 10.1021/am5038577] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Solid nanoparticle-lipid hybrids have been engineered by using spray drying to assemble monodisperse hydrophilic silica nanoparticles and submicron lipid (triglyceride) emulsions together into composite microparticles, which have specific activity toward enzymes. The influence of silica particle size (100-1000 nm) and emulsifier type (anionic and cationic) on the three-dimensional structure of the composite particles was investigated. The nanostructure of the hybrid particles, which is controlled by the size of the voids between the closely packed silica particles, plays a critical role in lipase action and hence lipid digestion kinetics. Confining lipid droplets within the nanostructured silica aggregates led to 2- to 15-fold enhanced rate of lipolysis in comparison with dispersed coarse oil droplets. The composite particles were tailored to enhance, retain or sustain the lipolysis kinetics of submicron lipid emulsions. The presence of repulsive nanoparticle-droplet interactions favored aqueous redispersion and fast lipolysis of the hybrid composite materials, while attractive interactions hindered redispersion and delayed lipolysis of the confined lipid droplets. Such hybrid nanomaterials can be exploited to control the gastrointestinal enzymatic action and promisingly form the basis for the next generation of foods and medicines.
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Affiliation(s)
- Angel Tan
- Ian Wark Research Institute, University of South Australia , Mawson Lakes Campus, Mawson Lakes, SA 5095, Australia
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Stephant N, Rondeau B, Gauthier JP, Cody JA, Fritsch E. Investigation of hidden periodic structures on SEM images of opal-like materials using FFT and IFFT. Scanning 2014; 36:487-499. [PMID: 24752811 DOI: 10.1002/sca.21144] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 03/23/2014] [Indexed: 06/03/2023]
Abstract
We have developed a method to use fast Fourier transformation (FFT) and inverse fast Fourier transformation (IFFT) to investigate hidden periodic structures on SEM images. We focused on samples of natural, play-of-color opals that diffract visible light and hence are periodically structured. Conventional sample preparation by hydrofluoric acid etch was not used; untreated, freshly broken surfaces were examined at low magnification relative to the expected period of the structural features, and, the SEM was adjusted to get a very high number of pixels in the images. These SEM images were treated by software to calculate autocorrelation, FFT, and IFFT. We present how we adjusted SEM acquisition parameters for best results. We first applied our procedure on an SEM image on which the structure was obvious. Then, we applied the same procedure on a sample that must contain a periodic structure because it diffracts visible light, but on which no structure was visible on the SEM image. In both cases, we obtained clearly periodic patterns that allowed measurements of structural parameters. We also investigated how the irregularly broken surface interfered with the periodic structure to produce additional periodicity. We tested the limits of our methodology with the help of simulated images.
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Affiliation(s)
- Nicolas Stephant
- Institut des Matériaux Jean Rouxel, University of Nantes, Nantes, France
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Xu J, Sun L, Li J, Liang J, Zhang H, Yang W. FITC and Ru(phen)32+ co-doped silica particles as visualized ratiometric pH indicator. Nanoscale Res Lett 2011; 6:561. [PMID: 22027093 PMCID: PMC3220666 DOI: 10.1186/1556-276x-6-561] [Citation(s) in RCA: 24] [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: 06/14/2011] [Accepted: 10/25/2011] [Indexed: 05/29/2023]
Abstract
The performance of fluorescein isothiocyanate (FITC) and tris(1, 10-phenanathroline) ruthenium ion (Ru(phen)32+) co-doped silica particles as pH indicator was evaluated. The emission intensity ratios of the pH sensitive dye (FITC) and the reference dye (Ru(phen)32+) in the particles were dependent on pH of the environment. The changes in emission intensity ratios of the two dyes under different pH could be measured under single excitation wavelength and readily visualized by naked eye under a 365-nm UV lamp. In particular, such FITC and Ru(phen)32+ co-doped silica particles were identified to show high sensitivity to pH around the pKa of FITC (6.4), making them be potential useful as visualized pH indicator for detection of intracellular pH micro-circumstance.
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Affiliation(s)
- Jianquan Xu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Lei Sun
- College of Public Health, Jilin University, Changchun, Jilin, 130021, People's Republic of China
| | - Jun Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Jinglun Liang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Huimao Zhang
- China-Japan Union Hospital, Jilin University, Changchun 130033, People's Republic of China
| | - Wensheng Yang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
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Abstract
We report the synthesis of S-nitrosothiol-modified silica particles capable of nitric oxide (NO) release. The thiol precursor modification to form S-nitrosothiol NO donors was introduced into the silica network via co-condensation of mercaptosilane and alkoxysilane precursors. Both the concentrations of reactants (i.e., water, ammonia, and silane) and the silane feed rate into the reaction proved important in the yield of monodisperse, spherical particles with tunable diameters ranging from 241-718 nm. Subsequent nitrosation resulted in NO storage approaching ~4.40 μmol NO mg(-1), as determined by total NO release. Behaving similar to low molecular weight S-nitrosothiol NO donors, the NO release from the macromolecular silica vehicles was influenced by light, temperature, and metal ions.
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Affiliation(s)
- Daniel A. Riccio
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Julia L. Nugent
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Mark H. Schoenfisch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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