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Chen Y, Brook MA. Starch-Directed Synthesis of Worm-Shaped Silica Microtubes. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2831. [PMID: 37049125 PMCID: PMC10096145 DOI: 10.3390/ma16072831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/28/2023] [Accepted: 03/31/2023] [Indexed: 06/19/2023]
Abstract
Many strategies have been adopted to prepare silica materials with highly controlled structures, typically using sol-gel chemistry. Frequently, the alkoxysilanes used in sol-gel chemistry are based on monoalcohols, e.g., Si(OEt)4. The structural control over silica synthesis achieved by these precursors is highly sensitive to pH and solvency. Alkoxysilanes derived from the sugar alcohol glycerol (diglycerylsilane) react more slowly and with much less sensitivity to pH. We report that, in the presence of cooled aqueous starch solutions, glyceroxysilanes undergo transesterification with the sugars on starch, leading to (hollow) microtubules resembling worms of about 400 nm in diameter. The tubes arise from the pre-assembly of starch bundles, which occurs only well below room temperature. It is straightforward to treat the first-formed starch/silica composite with the enzyme amylase to, in a programmed fashion, increasingly expose porosity, including the worm morphology, while washing away untethered silica and digested starch to leave an open, highly porous materials. Sintering at 600 °C completely removes the starch silane moieties.
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2
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Khonina TG, Tishin DS, Larionov LP, Dobrinskaya MN, Antropova IP, Izmozherova NV, Osipenko AV, Shadrina EV, Nikitina EY, Bogdanova EA, Karabanalov MS, Evstigneeva NP, Kokhan MM, Chupakhin ON. Bioactive silicon-iron-containing glycerohydrogel synthesized by the sol—gel method in the presence of chitosan. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3661-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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3
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Jayash SN, Cooper PR, Shelton RM, Kuehne SA, Poologasundarampillai G. Novel Chitosan-Silica Hybrid Hydrogels for Cell Encapsulation and Drug Delivery. Int J Mol Sci 2021; 22:ijms222212267. [PMID: 34830145 PMCID: PMC8624171 DOI: 10.3390/ijms222212267] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 11/16/2022] Open
Abstract
Hydrogels constructed from naturally derived polymers provide an aqueous environment that encourages cell growth, however, mechanical properties are poor and degradation can be difficult to predict. Whilst, synthetic hydrogels exhibit some improved mechanical properties, these materials lack biochemical cues for cells growing and have limited biodegradation. To produce hydrogels that support 3D cell cultures to form tissue mimics, materials must exhibit appropriate biological and mechanical properties. In this study, novel organic-inorganic hybrid hydrogels based on chitosan and silica were prepared using the sol-gel technique. The chemical, physical and biological properties of the hydrogels were assessed. Statistical analysis was performed using One-Way ANOVAs and independent-sample t-tests. Fourier transform infrared spectroscopy showed characteristic absorption bands including amide II, Si-O and Si-O-Si confirming formation of hybrid networks. Oscillatory rheometry was used to characterise the sol to gel transition and viscoelastic behaviour of hydrogels. Furthermore, in vitro degradation revealed both chitosan and silica were released over 21 days. The hydrogels exhibited high loading efficiency as total protein loading was released in a week. There were significant differences between TC2G and C2G at all-time points (p < 0.05). The viability of osteoblasts seeded on, and encapsulated within, the hydrogels was >70% over 168 h culture and antimicrobial activity was demonstrated against Pseudomonas aeruginosa and Enterococcus faecalis. The hydrogels developed here offer alternatives for biopolymer hydrogels for biomedical use, including for application in drug/cell delivery and for bone tissue engineering.
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Affiliation(s)
- Soher N. Jayash
- School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham B5 7EG, UK; (R.M.S.); (S.A.K.)
- Correspondence: or (S.N.J.); (G.P.)
| | - Paul R. Cooper
- Department of Oral Sciences, Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand;
| | - Richard M. Shelton
- School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham B5 7EG, UK; (R.M.S.); (S.A.K.)
| | - Sarah A. Kuehne
- School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham B5 7EG, UK; (R.M.S.); (S.A.K.)
| | - Gowsihan Poologasundarampillai
- School of Dentistry, University of Birmingham, 5 Mill Pool Way, Edgbaston, Birmingham B5 7EG, UK; (R.M.S.); (S.A.K.)
- Correspondence: or (S.N.J.); (G.P.)
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4
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Poddar S, Sharmeen S, Hage DS. Affinity monolith chromatography: A review of general principles and recent developments. Electrophoresis 2021; 42:2577-2598. [PMID: 34293192 DOI: 10.1002/elps.202100163] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/07/2021] [Accepted: 07/18/2021] [Indexed: 12/28/2022]
Abstract
Affinity monolith chromatography (AMC) is a liquid chromatographic technique that utilizes a monolithic support with a biological ligand or related binding agent to isolate, enrich, or detect a target analyte in a complex matrix. The target-specific interaction exhibited by the binding agents makes AMC attractive for the separation or detection of a wide range of compounds. This article will review the basic principles of AMC and recent developments in this field. The supports used in AMC will be discussed, including organic, inorganic, hybrid, carbohydrate, and cryogel monoliths. Schemes for attaching binding agents to these monoliths will be examined as well, such as covalent immobilization, biospecific adsorption, entrapment, molecular imprinting, and coordination methods. An overview will then be given of binding agents that have recently been used in AMC, along with their applications. These applications will include bioaffinity chromatography, immunoaffinity chromatography, immobilized metal-ion affinity chromatography, and dye-ligand or biomimetic affinity chromatography. The use of AMC in chiral separations and biointeraction studies will also be discussed.
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Affiliation(s)
- Saumen Poddar
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA
| | - Sadia Sharmeen
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA
| | - David S Hage
- Department of Chemistry, University of Nebraska-Lincoln, Lincoln, Nebraska, 68588, USA
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5
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Khonina TG, Nikitina EY, Shadrina EV, Evstigneeva NP, Kokhan MM, Ganebnykh IN, Karabanalov MS, Kuznetsov DK, Valova MS, Chupakhin ON. Synthesis and antimicrobial activity of silicon—titanium—zinc- and silicon—titanium—boron-containing glycerohydrogels. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3174-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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6
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Khonina T, Chupakhin O, Shur V, Turygin A, Sadovsky V, Mandra Y, Sementsova E, Kotikova A, Legkikh A, Nikitina E, Bogdanova E, Sabirzyanov N. Silicon-hydroxyapatite‒glycerohydrogel as a promising biomaterial for dental applications. Colloids Surf B Biointerfaces 2020; 189:110851. [DOI: 10.1016/j.colsurfb.2020.110851] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 02/05/2020] [Accepted: 02/06/2020] [Indexed: 12/28/2022]
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7
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Synthesis and pharmacological activity of a silicon—zinc—boron-containing glycerohydrogel. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2601-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Advanced drug delivery systems and artificial skin grafts for skin wound healing. Adv Drug Deliv Rev 2019; 146:209-239. [PMID: 30605737 DOI: 10.1016/j.addr.2018.12.014] [Citation(s) in RCA: 295] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/27/2018] [Accepted: 12/27/2018] [Indexed: 12/14/2022]
Abstract
Cutaneous injuries, especially chronic wounds, burns, and skin wound infection, require painstakingly long-term treatment with an immense financial burden to healthcare systems worldwide. However, clinical management of chronic wounds remains unsatisfactory in many cases. Various strategies including growth factor and gene delivery as well as cell therapy have been used to enhance the healing of non-healing wounds. Drug delivery systems across the nano, micro, and macroscales can extend half-life, improve bioavailability, optimize pharmacokinetics, and decrease dosing frequency of drugs and genes. Replacement of the damaged skin tissue with substitutes comprising cell-laden scaffold can also restore the barrier and regulatory functions of skin at the wound site. This review covers comprehensively the advanced treatment strategies to improve the quality of wound healing.
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Coccia F, Tonucci L, Del Boccio P, Caporali S, Hollmann F, d'Alessandro N. Stereoselective Double Reduction of 3-Methyl-2-cyclohexenone, by Use of Palladium and Platinum Nanoparticles, in Tandem with Alcohol Dehydrogenase. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E853. [PMID: 30347698 PMCID: PMC6215098 DOI: 10.3390/nano8100853] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/12/2018] [Accepted: 10/17/2018] [Indexed: 11/25/2022]
Abstract
The combination of metal nanoparticles (Pd or Pt NPs) with NAD-dependent thermostable alcohol dehydrogenase (TADH) resulted in the one-flask catalytic double reduction of 3-methyl-2-cyclohexenone to 3-(1S,3S)-methylcyclohexanol. In this article, some assumptions about the interactions between a chemocatalyst and a biocatalyst have been proposed. It was demonstrated that the size of the NPs was the critical parameter for the mutual inhibition: the bigger the NPs, the more harmful for the enzyme they were, even if the NPs themselves were only moderately inactivated. Conversely, the smaller the NPs, the more minimal the TADH denaturation, although they were dramatically inhibited. Resuming, the chemocatalysts were very sensitive to deactivation, which was not related to the amount of enzyme used, while the inhibition of the biocatalyst can be strongly reduced by minimizing the NPs/TADH ratio used to catalyze the reaction. Among some methods to avoid direct binding of NPs with TADH, we found that using large Pd NPs and protecting their surfaces with a silica shell, the overall yield of 3-(1S,3S)-methylcyclohexanol was maximized (36%).
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Affiliation(s)
- Francesca Coccia
- Department of Engineering and Geology (INGEO), G. d'Annunzio University of Chieti-Pescara, Viale Pindaro 42, I-66100 Chieti Scalo, Italy.
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands.
| | - Lucia Tonucci
- Department of Philosophical, Educational and Economic Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, I-66100 Chieti Scalo, Italy.
| | - Piero Del Boccio
- Department of Pharmacy, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini 31, I-66100 Chieti Scalo, Italy.
| | - Stefano Caporali
- Department of Chemistry, University of Firenze, Via della Lastruccia 3-13, I-50019 Sesto Fiorentino, Italy.
| | - Frank Hollmann
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629HZ Delft, The Netherlands.
| | - Nicola d'Alessandro
- Department of Engineering and Geology (INGEO), G. d'Annunzio University of Chieti-Pescara, Viale Pindaro 42, I-66100 Chieti Scalo, Italy.
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10
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Holzmeister I, Schamel M, Groll J, Gbureck U, Vorndran E. Artificial inorganic biohybrids: The functional combination of microorganisms and cells with inorganic materials. Acta Biomater 2018; 74:17-35. [PMID: 29698705 DOI: 10.1016/j.actbio.2018.04.042] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/12/2018] [Accepted: 04/22/2018] [Indexed: 02/07/2023]
Abstract
Biohybrids can be defined as the functional combination of proteins, viable cells or microorganisms with non-biological materials. This article reviews recent findings on the encapsulation of microorganisms and eukaryotic cells in inorganic matrices such as silica gels or cements. The entrapment of biological entities into a support material is of great benefit for processing since the encapsulation matrix protects sensitive cells from shear forces, unfavourable pH changes, or cytotoxic solvents, avoids culture-washout, and simplifies the separation of formed products. After reflecting general aspects of such an immobilization as well as the chemistry of the inorganic matrices, we focused on manufacturing aspects and the application of such biohybrids in biotechnology, medicine as well as in environmental science and for civil engineering purpose. STATEMENT OF SIGNIFICANCE The encapsulation of living cells and microorganisms became an intensively studied and rapidly expanding research field with manifold applications in medicine, bio- and environmental technology, or civil engineering. Here, the use of silica or cements as encapsulation matrices have the advantage of a higher chemical and mechanical resistance towards harsh environmental conditions during processing compared to their polymeric counterparts. In this perspective, the article gives an overview about the inorganic material systems used for cell encapsulation, followed by reviewing the most important applications. The future may lay in a combination of the currently achieved biohybrid systems with additive manufacturing techniques. In a longer perspective, this would enable the direct printing of cell loaded bioreactor components.
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11
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Larchenko EY, Permikin VV, Safronov AP, Khonina TG. Structural features of polymeric silicon glycerolate hydrogels. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1911-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Herrmann JF, Kretschmer F, Hoeppener S, Höppener C, Schubert US. Ordered Arrangement and Optical Properties of Silica-Stabilized Gold Nanoparticle-PNIPAM Core-Satellite Clusters for Sensitive Raman Detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13. [PMID: 28834089 DOI: 10.1002/smll.201701095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/14/2017] [Indexed: 05/12/2023]
Abstract
Gold-polymer hybrid nanoparticles attract wide interest as building blocks for the engineering of photonic materials and plasmonic (active) metamaterials with unique optical properties. In particular, the coupling of the localized surface plasmon resonances of individual metal nanostructures in the presence of nanometric gaps can generate highly enhanced and confined electromagnetic fields, which are frequently exploited for metal-enhanced light-matter interactions. The optical properties of plasmonic structures can be tuned over a wide range of properties by means of their geometry and the size of the inserted nanoparticles as well as by the degree of order upon assembly into 1D, 2D, or 3D structures. Here, the synthesis of silica-stabilized gold-poly(N-isopropylacrylamide) (SiO2 -Au-PNIPAM) core-satellite superclusters with a narrow size distribution and their incorporation into ordered self-organized 3D assemblies are reported. Significant alterations of the plasmon resonance are found for different assembled structures as well as strongly enhanced Raman signatures are observed. In a series of experiments, the origin of the highly enhanced signals can be assigned to the interlock areas of adjacent SiO2 -Au-PNIPAM core-satellite clusters and their application for highly sensitive nanoparticle-enhanced Raman spectroscopy is demonstrated.
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Affiliation(s)
- Janning F Herrmann
- Nanobiophotonics, Institute of Physics, University of Münster, Willhelm-Klemm-Str. 10, 48149, Münster, Germany
| | - Florian Kretschmer
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Stephanie Hoeppener
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
| | - Christiane Höppener
- Nanobiophotonics, Institute of Physics, University of Münster, Willhelm-Klemm-Str. 10, 48149, Münster, Germany
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
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13
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Khonina TG, Ivanenko MV, Chupakhin ON, Safronov AP, Bogdanova EA, Karabanalov MS, Permikin VV, Larionov LP, Drozdova LI. Silicon-zinc-glycerol hydrogel, a potential immunotropic agent for topical application. Eur J Pharm Sci 2017; 107:197-202. [DOI: 10.1016/j.ejps.2017.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 07/07/2017] [Accepted: 07/10/2017] [Indexed: 10/19/2022]
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14
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Meseck GR, Terpstra AS, MacLachlan MJ. Liquid crystal templating of nanomaterials with nature's toolbox. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2017.01.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Polydimethylsiloxane Substrates with Surfaces Decorated by Immobilized Hyaluronic Acids of Different Molecular Weight for Biomedical Applications. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2016. [DOI: 10.1007/s13369-016-2354-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Soares SF, Trindade T, Daniel-da-Silva AL. Carrageenan-Silica Hybrid Nanoparticles Prepared by a Non-Emulsion Method. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500450] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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17
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Desmet J, Meunier C, Danloy E, Duprez ME, Lox F, Thomas D, Hantson AL, Crine M, Toye D, Rooke J, Su BL. Highly efficient, long life, reusable and robust photosynthetic hybrid core–shell beads for the sustainable production of high value compounds. J Colloid Interface Sci 2015; 448:79-87. [DOI: 10.1016/j.jcis.2015.01.091] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 01/29/2015] [Accepted: 01/31/2015] [Indexed: 11/30/2022]
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18
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Feinle A, Flaig S, Puchberger M, Schubert U, Hüsing N. Stable carboxylic acid derivatized alkoxy silanes. Chem Commun (Camb) 2015; 51:2339-41. [PMID: 25562640 DOI: 10.1039/c4cc08025d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A convenient and straightforward one-pot hydrosilylation reaction of different unsaturated carboxylic acids with trialkoxysilanes in the presence of catalytic amounts of platinum(IV) dioxide resulted in excellent yields in organofunctional silanes combining carboxy- and alkoxy groups within one molecule.
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Affiliation(s)
- A Feinle
- Materials Chemistry, Paris Lodron University Salzburg, Hellbrunner Str. 34, A-5020 Salzburg, Austria.
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19
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Zeno WF, Hilt S, Risbud SH, Voss JC, Longo ML. Spectroscopic Characterization of Structural Changes in Membrane Scaffold Proteins Entrapped within Mesoporous Silica Gel Monoliths. ACS APPLIED MATERIALS & INTERFACES 2015; 7:8640-8649. [PMID: 25849085 PMCID: PMC5522711 DOI: 10.1021/acsami.5b00898] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The changes in the orientation and conformation of three different membrane scaffold proteins (MSPs) upon entrapment in sol-gel-derived mesoporous silica monoliths were investigated. MSPs were examined in either a lipid-free or a lipid-bound conformation, where the proteins were associated with lipids to form nanolipoprotein particles (NLPs). NLPs are water-soluble, disk-shaped patches of a lipid bilayer that have amphiphilic MSPs shielding the hydrophobic lipid tails. The NLPs in this work had an average thickness of 5 nm and diameters of 9.2, 9.7, and 14.8 nm. We have previously demonstrated that NLPs are more suitable lipid-based structures for silica gel entrapment than liposomes because of their size compatibility with the mesoporous network (2-50 nm) and minimally altered structure after encapsulation. Here we further elaborate on that work by using a variety of spectroscopic techniques to elucidate whether or not different MSPs maintain their protein-lipid interactions after encapsulation. Fluorescence spectroscopy and quenching of the tryptophan residues with acrylamide, 5-DOXYL-stearic acid, and 16-DOXYL-stearic acid were used to determine the MSP orientation. We also utilized fluorescence anisotropy of tryptophans to measure the relative size of the NLPs and MSP aggregates after entrapment. Finally, circular dichroism spectroscopy was used to examine the secondary structure of the MSPs. Our results showed that, after entrapment, all of the lipid-bound MSPs maintained orientations that were minimally changed and indicative of association with lipids in NLPs. The tryptophan residues appeared to remain buried within the hydrophobic core of the lipid tails in the NLPs and appropriately spaced from the bilayer center. Also, after entrapment, lipid-bound MSPs maintained a high degree of α-helical content, a secondary structure associated with protein-lipid interactions. These findings demonstrate that NLPs are capable of serving as viable hosts for functional integral membrane proteins in the synthesis of sol-gel-derived bioinorganic hybrid nanomaterials.
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Affiliation(s)
- Wade F. Zeno
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California, 95616
| | - Silvia Hilt
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California, 95616
| | - Subhash H. Risbud
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California, 95616
| | - John C. Voss
- Department of Biochemistry and Molecular Medicine, University of California Davis, Davis, California, 95616
| | - Marjorie L. Longo
- Department of Chemical Engineering and Materials Science, University of California Davis, Davis, California, 95616
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Larchenko EY, Khonina TG, Shadrina EV, Pestov AV, Chupakhin ON, Menshutina NV, Lebedev AE, Lovskaya DD, Larionov LP, Chigvintsev SA. Pharmacologically active hydrogels derived from silicon glycerolates and chitosan. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0578-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Chupakhin ON, Bondarev AN, Shtan’ko IN, Khonina TG, Shadrina EV, Bogdanova EA, Larionov LP. Synthesis and properties of biologically active silicon,zinc—glycerohydrogel. Russ Chem Bull 2015. [DOI: 10.1007/s11172-014-0577-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Berezhetska O, Liberelle B, De Crescenzo G, Cicoira F. A simple approach for protein covalent grafting on conducting polymer films. J Mater Chem B 2015; 3:5087-5094. [DOI: 10.1039/c5tb00373c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By mixing a PEDOT:PSS suspension with the modified biopolymer carboxymethylated dextran (CMD), we obtain conductive films displaying carboxyl (–COOH) groups allowing for covalent grafting of proteins via amide bonds.
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Affiliation(s)
- Olga Berezhetska
- Department of Chemical Engineering
- Polytechnique Montreal. P.O. Box 6079
- Montréal (QC)
- Canada H3C 3A7
| | - Benoît Liberelle
- Department of Chemical Engineering
- Polytechnique Montreal. P.O. Box 6079
- Montréal (QC)
- Canada H3C 3A7
| | - Gregory De Crescenzo
- Department of Chemical Engineering
- Polytechnique Montreal. P.O. Box 6079
- Montréal (QC)
- Canada H3C 3A7
| | - Fabio Cicoira
- Department of Chemical Engineering
- Polytechnique Montreal. P.O. Box 6079
- Montréal (QC)
- Canada H3C 3A7
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23
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Khonina TG, Safronov AP, Ivanenko MV, Shadrina EV, Chupakhin ON. Features of silicon– and titanium–polyethylene glycol precursors in sol–gel synthesis of new hydrogels. J Mater Chem B 2015; 3:5490-5500. [DOI: 10.1039/c5tb00480b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The formation of organic/inorganic hydrogels based on silicon and titanium polyethylene glycolates, new biocompatible water-soluble precursors in sol–gel processing, was investigated.
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Affiliation(s)
- T. G. Khonina
- Russian Academy of Sciences
- Ural Branch
- Postovsky Institute of Organic Synthesis
- Ekaterinburg 620990
- Russian Federation
| | - A. P. Safronov
- Russian Academy of Sciences
- Ural Branch
- Institute of Electrophysics
- Ekaterinburg 620016
- Russian Federation
| | - M. V. Ivanenko
- Russian Academy of Sciences
- Ural Branch
- Postovsky Institute of Organic Synthesis
- Ekaterinburg 620990
- Russian Federation
| | - E. V. Shadrina
- Russian Academy of Sciences
- Ural Branch
- Postovsky Institute of Organic Synthesis
- Ekaterinburg 620990
- Russian Federation
| | - O. N. Chupakhin
- Russian Academy of Sciences
- Ural Branch
- Postovsky Institute of Organic Synthesis
- Ekaterinburg 620990
- Russian Federation
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Giese M, Blusch LK, Khan MK, MacLachlan MJ. Functional Materials from Cellulose-Derived Liquid-Crystal Templates. Angew Chem Int Ed Engl 2014; 54:2888-910. [DOI: 10.1002/anie.201407141] [Citation(s) in RCA: 278] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2014] [Indexed: 01/24/2023]
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25
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Giese M, Blusch LK, Khan MK, MacLachlan MJ. Funktionsmaterialien mit Cellulose-basierten Flüssigkristall-Templaten. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407141] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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26
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Zeno WF, Hilt S, Aravagiri K, Risbud SH, Voss JC, Parikh AN, Longo ML. Analysis of lipid phase behavior and protein conformational changes in nanolipoprotein particles upon entrapment in sol-gel-derived silica. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:9780-9788. [PMID: 25062385 PMCID: PMC4140539 DOI: 10.1021/la5025058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 07/24/2014] [Indexed: 06/02/2023]
Abstract
The entrapment of nanolipoprotein particles (NLPs) and liposomes in transparent, nanoporous silica gel derived from the precursor tetramethylorthosilicate was investigated. NLPs are discoidal patches of lipid bilayer that are belted by amphiphilic scaffold proteins and have an average thickness of 5 nm. The NLPs in this work had a diameter of roughly 15 nm and utilized membrane scaffold protein (MSP), a genetically altered variant of apolipoprotein A-I. Liposomes have previously been examined inside of silica sol-gels and have been shown to exhibit instability. This is attributed to their size (∼150 nm) and altered structure and constrained lipid dynamics upon entrapment within the nanometer-scale pores (5-50 nm) of the silica gel. By contrast, the dimensional match of NLPs with the intrinsic pore sizes of silica gel opens the possibility for their entrapment without disruption. Here we demonstrate that NLPs are more compatible with the nanometer-scale size of the porous environment by analysis of lipid phase behavior via fluorescence anisotropy and analysis of scaffold protein secondary structure via circular dichroism spectroscopy. Our results showed that the lipid phase behavior of NLPs entrapped inside of silica gel display closer resemblance to its solution behavior, more so than liposomes, and that the MSP in the NLPs maintain the high degree of α-helix secondary structure associated with functional protein-lipid interactions after entrapment. We also examined the effects of residual methanol on lipid phase behavior and the size of NLPs and found that it exerts different influences in solution and in silica gel; unlike in free solution, silica entrapment may be inhibiting NLP size increase and/or aggregation. These findings set precedence for a bioinorganic hybrid nanomaterial that could incorporate functional integral membrane proteins.
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Affiliation(s)
- Wade F. Zeno
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - Silvia Hilt
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - Kannan
K. Aravagiri
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - Subhash H. Risbud
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - John C. Voss
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - Atul N. Parikh
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
| | - Marjorie L. Longo
- Department
of Chemical Engineering and Materials Science and Department of
Biochemistry and Molecular Medicine, University
of California Davis, Davis, California 95616, United States
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Forsberg EM, Brennan JD. Bio-Solid-Phase Extraction/Tandem Mass Spectrometry for Identification of Bioactive Compounds in Mixtures. Anal Chem 2014; 86:8457-65. [DOI: 10.1021/ac5022166] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erica M. Forsberg
- Biointerfaces Institute and Department of Chemistry & Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
| | - John D. Brennan
- Biointerfaces Institute and Department of Chemistry & Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8, Canada
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28
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Titanium polyethylene glycolates and hydrogels on the basis of the glycolates. Russ Chem Bull 2014. [DOI: 10.1007/s11172-014-0647-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Smith AME, Fortuna J, Forsberg EM, Brennan JD. An automated materials screening approach for the development of sol–gel derived monolithic silica enzyme reactor columns. RSC Adv 2014. [DOI: 10.1039/c4ra00734d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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30
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Biomaterial Thin Films by Soft Pulsed Laser Technologies for Biomedical Applications. LASERS IN MATERIALS SCIENCE 2014. [DOI: 10.1007/978-3-319-02898-9_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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31
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Lu C, Zahedi P, Forman A, Allen C. Multi-arm PEG/silica hydrogel for sustained ocular drug delivery. J Pharm Sci 2013; 103:216-26. [PMID: 24285503 DOI: 10.1002/jps.23777] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2013] [Revised: 09/20/2013] [Accepted: 10/18/2013] [Indexed: 11/12/2022]
Abstract
In the present study, a series of sustained drug delivery multiarm poly(ethylene glycol) (PEG)/silica hydrogels were prepared and characterized. The hydrogels were formed by hydrolysis and condensation of poly(4-arm PEG silicate) using the sol-gel method. The relationships between water content in the PEG/silica hydrogel and stability as well as rheological properties were evaluated. Scanning electron microscopy analysis of the PEG/silica hydrogels revealed water content-dependent changes in microstructure. An increase in water content resulted in larger pores within the hydrogel, longer gelation time and higher viscosity. The PEG/silica hydrogels were loaded with dexamethasone (DMS) or dexamethasone sodium phosphate (DMSP), drugs that are hydrophobic and hydrophilic in nature, respectively. Evaluation of in vitro release revealed a zero-order release profile for DMS over the first 6 days, suggesting that degradation of the silica hydrogel matrix was the primary mechanism of drug release. It was also found that the drug-release profile could be tailored by varying the water content used during hydrogel preparation. In contrast, more than 90% of DMSP was released within 1 h, suggesting that DMSP release was only controlled by diffusion. Overall, results from this study indicate that PEG/silica hydrogels may be promising drug-eluting depot materials for the sustained delivery of hydrophobic, ophthalmic drugs.
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Affiliation(s)
- Changhai Lu
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
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32
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Carrasquilla C, Brennan JD. Functional nucleic acid entrapment in sol-gel derived materials. Methods 2013; 63:255-65. [PMID: 24025165 DOI: 10.1016/j.ymeth.2013.08.035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 07/21/2013] [Accepted: 08/28/2013] [Indexed: 01/05/2023] Open
Abstract
Functional nucleic acids (FNAs) are single-stranded DNA or RNA molecules, typically generated through in vitro selection, that have the ability to act as receptors for target molecules (aptamers) or perform catalysis of a chemical reaction (deoxyribozymes and ribozymes). Fluorescence-signaling aptamers and deoxyribozymes have recently emerged as promising biological recognition and signaling elements, although little has been done to evaluate their potential for solid-phase assays, particularly with species made of RNA due to their lack of chemical stability and susceptibility to nuclease attack. Herein, we present a detailed overview of the methods utilized for solid-phase immobilization of FNAs using a sol-gel entrapment method that can provide protection from nuclease degradation and impart long-term chemical stability to the FNA reporter systems, while maintaining their signaling capabilities. This article will also provide a brief review of the results of such entrapment studies involving fluorescence-signaling versions of a DNA aptamer, selected RNA-cleaving deoxyribozymes, and two different RNA aptamers in a series of sol-gel derived composites, ranging from highly polar silica to hydrophobic methylsilsesquioxane-based materials. Given the ability to produce sol-gel derived materials in a variety of configurations, particularly as thin film coatings on electrodes, optical fibers, and other devices, this entrapment method should provide a useful platform for numerous solid-phase FNA-based biosensing applications.
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Affiliation(s)
- Carmen Carrasquilla
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario L8S 4M1, Canada
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33
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Ivanenko MV, Khonina TG, Chupakhin ON, Larionov LP, Sakhautdinova RR, Safronov AP. Synthesis of pharmacologically active hydrogels based on combined silicon and titanium polyolates. Russ Chem Bull 2013. [DOI: 10.1007/s11172-012-0303-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Rajendra V, Brook MA. Controlled formation of macroporous or hollow silica particles in non-aqueous silicone dispersions. RSC Adv 2013. [DOI: 10.1039/c3ra45182h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Ou J, Lin H, Zhang Z, Huang G, Dong J, Zou H. Recent advances in preparation and application of hybrid organic-silica monolithic capillary columns. Electrophoresis 2012; 34:126-40. [PMID: 23161325 DOI: 10.1002/elps.201200344] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 10/13/2012] [Accepted: 10/13/2012] [Indexed: 01/19/2023]
Abstract
Hybrid organic-silica monolithic columns, regarded as a second generation of silica-based monoliths, have received much interest due to their unique properties over the pure silica-based monoliths. This review mainly focuses on development in the fields of preparation of hybrid monolithic columns in a capillary and their application for CEC and capillary liquid chromatography separation, as well as for sample pretreatment of solid-phase microextraction and immobilized enzyme reactor since July 2010. The preparation approaches are comprehensively summarized with three routes: (i) general sol-gel process using trialkoxysilanes and tetraalkoxysilanes as coprecursors; (ii) "one-pot" process of alkoxysilanes and organic monomers concomitantly proceeding sol-gel chemistry and free radical polymerization; and (iii) other polymerization approaches of organic monomers containing silanes. The modification of hybrid monoliths containing reactive groups to acquire the desired surface functionality is also described.
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Affiliation(s)
- Junjie Ou
- CAS Key Laboratory of Separation Science for Analytical Chemistry, National Chromatographic R & A Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, China.
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36
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Calleri E, Ambrosini S, Temporini C, Massolini G. New monolithic chromatographic supports for macromolecules immobilization: Challenges and opportunities. J Pharm Biomed Anal 2012; 69:64-76. [DOI: 10.1016/j.jpba.2012.01.032] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 01/19/2012] [Accepted: 01/20/2012] [Indexed: 01/15/2023]
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37
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Vanderkooy A, Brook MA. Polyvinylpyrrolidone molecular weight controls silica shell thickness on Au nanoparticles with diglycerylsilane as precursor. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3980-3986. [PMID: 22767525 DOI: 10.1021/am300809q] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Several strategies have been described for the preparation of silica-encapsulated gold nanoparticles (SiO(2)-AuNP), which typically suffer from an initial interface between gold and silica that is difficult to control, and layer thicknesses that are very sensitive to minor changes in silane concentration and incubation time. The silica shell thicknesses are normally equal to or larger than the gold particles themselves, which is disadvantageous when the particles are to be used for biodiagnostic applications. We present a facile and reproducible method to produce very thin silica shells (3-5 nm) on gold nanoparticles: the process is highly tolerant to changes in reaction conditions. The method utilized polyvinylpyrrolidone (PVP) of specific molecular weights to form the interface between gold and silica. The method further requires a nontraditional silica precursor, diglycerylsilane, which efficiently undergoes sol-gel processing at neutrality. Under these conditions, higher molecular weight PVP leads to thicker silica shells: PVP acts as the locus for silica growth into an interpenetrating organic-inorganic hybrid structure.
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Affiliation(s)
- Alan Vanderkooy
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1
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38
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Carrasquilla C, Lau PS, Li Y, Brennan JD. Stabilizing structure-switching signaling RNA aptamers by entrapment in sol-gel derived materials for solid-phase assays. J Am Chem Soc 2012; 134:10998-1005. [PMID: 22724553 DOI: 10.1021/ja304064a] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Structure-switching, fluorescence-signaling DNA and RNA aptamers have been reported as highly versatile molecular recognition elements for biosensor development. While structure-switching DNA aptamers have been utilized for solid-phase sensing, equivalent RNA aptamers have yet to be successfully utilized in solid-phase sensors due to their lack of chemical stability and susceptibility to nuclease attack. In this study, we examined entrapment into sol-gel derived organic-inorganic composite materials as a platform for immobilization of structure-switching fluorescence-signaling RNA aptamer reporters, using both the synthetic theophylline- and naturally occurring thiamine pyrophosphate-binding RNA aptamers as test cases. Structure-switching versions of both aptamers were entrapped into a series of sol-gel derived composites, ranging from highly polar silica to hydrophobic methylsilsesquioxane-based materials, and the target-binding and signaling capabilities of these immobilized aptamers were assessed relative to solution. Both immobilized aptamers demonstrated sensitivity and selectivity similar to that of free aptamers when entrapped in a composite material derived from 40% (v/v) methyltrimethoxysilane/tetramethoxysilane. Importantly, this material also conferred protection from nuclease degradation and imparted long-term chemical stability to the RNA reporter systems. Given the versatility of sol-gel entrapment for development of biosensors, microarrays, bioaffinity columns, and other devices, this entrapment method should provide a useful platform for numerous solid-phase RNA aptamer-based devices.
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Affiliation(s)
- Carmen Carrasquilla
- Department of Chemistry and Chemical Biology, McMaster University, Hamilton, Ontario, Canada, L8S 4M1
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39
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O'Dell WB, Beatty KJ, Kuo-Hsiang Tang J, Blankenship RE, Urban VS, O'Neill H. Sol–gel entrapped light harvesting antennas: immobilization and stabilization of chlorosomes for energy harvesting. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34357f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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40
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Vanderkooy A, Chen Y, Gonzaga F, Brook MA. Silica shell/gold core nanoparticles: correlating shell thickness with the plasmonic red shift upon aggregation. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3942-3947. [PMID: 21882833 DOI: 10.1021/am200825f] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Differences in the wavelengths of the surface plasmon band of gold nanoparticles (AuNP)--before and after particle aggregation--are widely used in bioanalytical assays. However, the gold surfaces in such bioassays can suffer from exchange and desorption of noncovalently bound ligands and from nonspecific adsorption of biomolecules. Silica shells on the surfaces of the gold can extend the available surface chemistries for bioconjugation and potentially avoid these issues. Therefore, silica was grown on gold surfaces using either hydrolysis/condensation of tetraethyl orthosilicate 1 under basic conditions or diglyceroxysilane 2 at neutral pH. The former precursor permitted slow, controlled growth of shells from about 1.7 to 4.3 nm thickness. By contrast, 3-4 nm thick silica shells formed within an hour using diglyceroxysilane; thinner or thicker shells were not readily available. Within the range of shell thicknesses synthesized, the presence of a silica shell on the gold nanoparticle did not significantly affect the absorbance maximum (~5 nm) of unaggregated particles. However, the change in absorbance wavelength upon aggregation of the particles was highly dependent on the thickness of the shell. With silica shells coating the AuNP, there was a significant decrease in the absorbance maximum of the aggregated particles, from ~578 to ~536 nm, as the shell thicknesses increased from ~1.7 to ~4.3 nm, because of increased distance between adjacent gold cores. These studies provide guidance for the development of colorimetric assays using silica-coated AuNP.
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Affiliation(s)
- Alan Vanderkooy
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, Ontario, Canada L8S 4M1
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41
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Khonina TG, Safronov AP, Shadrina EV, Ivanenko MV, Suvorova AI, Chupakhin ON. Mechanism of structural networking in hydrogels based on silicon and titanium glycerolates. J Colloid Interface Sci 2011; 365:81-9. [PMID: 21978403 DOI: 10.1016/j.jcis.2011.09.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2011] [Revised: 09/09/2011] [Accepted: 09/10/2011] [Indexed: 11/27/2022]
Abstract
Formation of organic/inorganic hydrogels based on silicon- and titanium-glycerol precursors synthesized by transesterification of alkoxy derivatives in excess of glycerol was investigated. The precursors in excess of glycerol and obtained gels were studied by chemical and physical methods including gelation kinetics, IR spectroscopy, XRD, dynamic and electrophoretic light scattering, mechanical deformation, which disclosed the basic difference in the gelation mechanism and structure of network in the hydrogels. Due to this difference, the gelation time of silicon- and titanium-glycerol precursors depended on pH or electrolyte addition in an opposite way. In the wide pH range, silicon-glycerol hydrogel was a polymeric single-phase system formed by the polymeric network homogeneously swollen in liquid water/glycerol medium. Flory-Rehner theory applied to the elastic modulus of these gels gave 40-180 monomer base units in the subchains of the network depending on water content in the gel. The mechanism of networking was three-dimensional polycondensation promoted by the electrically charged functional groups attached to the flexible polymeric chains. Electrolyte solutions provided the gelation according to Hofmeister series. Titanium-glycerol hydrogels were heterogeneous colloid systems at pH>1.5 and single-phase polymeric gels at lower pH. Electrolyte solutions provided the gelation according to Schultze-Hardy rule.
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Affiliation(s)
- Tat'yana G Khonina
- I.Ya. Postovsky Institute of Organic Synthesis, Russian Academy of Sciences, 22/20 S. Kovalevskoy/Akademicheskaya St., 620041 Ekaterinburg, Russian Federation.
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42
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Forsberg EM, Green JRA, Brennan JD. Continuous Flow Immobilized Enzyme Reactor–Tandem Mass Spectrometry for Screening of AChE Inhibitors in Complex Mixtures. Anal Chem 2011; 83:5230-6. [PMID: 21591743 DOI: 10.1021/ac200534t] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erica M. Forsberg
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - James R. A. Green
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
| | - John D. Brennan
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4M1
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43
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Yao C, Qi L, Hu W, Wang F, Yang G. Immobilization of trypsin on sub-micron skeletal polymer monolith. Anal Chim Acta 2011; 692:131-7. [DOI: 10.1016/j.aca.2011.03.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/25/2011] [Accepted: 03/01/2011] [Indexed: 11/29/2022]
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44
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Sol-Gel Entrapped Levonorgestrel Antibodies: Activity and Structural Changes as a Function of Different Polymer Formats. MATERIALS 2011; 4:469-486. [PMID: 28880001 PMCID: PMC5448502 DOI: 10.3390/ma4030469] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 02/14/2011] [Accepted: 02/21/2011] [Indexed: 11/17/2022]
Abstract
The paper describes development of a sol-gel based immunoaffinity method for the steroid hormone levonorgestrel (LNG) and the effects of changes in the sol-gel matrix format on the activity of the entrapped antibodies (Abs) and on matrix structure. The best sol-gel format for Ab entrapment was found to be a tetramethoxysilane (TMOS) based matrix at a TMOS:water ratio of 1:8, containing 10% polyethylene glycol (PEG) of MW 0.4 kDa. Addition of higher percentages of PEG or a higher MW PEG did not improve activity. No activity was obtained with a TMOS:water ratio of 1:12, most likely because of the very dense polymer that resulted from these polymerization conditions. Only minor differences in the non-specific binding were obtained with the various formats. TMOS was found to be more effective than tetrakis (2-hydroxyethyl)orthosilicate (THEOS) for entrapment of anti-levonorgestrel (LNG) Abs. However, aging the THEOS-based sol-gel for a few weeks at 4 °C stabilized the entrapped Abs and increased its binding capacity. Confocal fluorescent microscopy with fluorescein isothiocyanate (FITC) labeled immunoglobulines (IgGs) entrapped in the sol-gel matrix showed that the entrapped Abs were distributed homogenously within the gel. Scanning electron microscopy (SEM) images have shown the diverse structures of the various sol-gel formats and precursors.
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45
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Tran-Thi TH, Dagnelie R, Crunaire S, Nicole L. Optical chemical sensors based on hybrid organic–inorganic sol–gel nanoreactors. Chem Soc Rev 2011; 40:621-39. [DOI: 10.1039/c0cs00021c] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Belton DJ, Deschaume O, Patwardhan SV, Perry CC. A solution study of silica condensation and speciation with relevance to in vitro investigations of biosilicification. J Phys Chem B 2010; 114:9947-55. [PMID: 20684617 DOI: 10.1021/jp101347q] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Requiring mild synthesis conditions and possessing a high level of organization and functionality, biosilicas constitute a source of wonder and inspiration for both materials scientists and biologists. In order to understand how such biomaterials are formed and to apply this knowledge to the generation of novel bioinspired materials, a detailed study of the materials, as formed under biologically relevant conditions, is required. In this contribution, data from a detailed study of silica speciation and condensation using a model bioinspired silica precursor (silicon catechol complex, SCC) is presented. The silicon complex quickly and controllably dissociates under neutral pH conditions to well-defined, metastable solutions of orthosilicic acid. The formation of silicomolybdous (blue) complexes was used to monitor and study different stages of silicic acid condensation. In parallel, the rates of silicomolybdic (yellow) complex formation, with mathematical modeling of the species present, was used to follow the solution speciation of polysilicic acids. The results obtained from the two assays correlate well. Monomeric silicic acid, trimeric silicic acids, and different classes of oligomeric polysilicic acids and silica nuclei can be identified and their periods of stability during the early stages of silica condensation measured. For experiments performed at a range of temperatures (273-323 K), an activation energy of 77 kJ.mol(-1) was obtained for the formation of trimers. The activation energies for the forward and reverse condensation reactions for addition of monomers to polysilicic acids (273-293 +/- 1 K) were 55.0 and 58.6 kJ.mol(-1), respectively. For temperatures above 293 K, these energies were reduced to 6.1 and 7.3 kJ.mol(-1), indicating a probable change in the prevailing condensation mechanism. The impact of pH on the rates of condensation were measured. There was a direct correlation between the apparent third-order rate constant for trimer formation and pH (4.7-6.9 +/- 0.1) while values for the reversible first-order rates reached a plateau at circumneutral pH. These different behaviors are discussed with reference to the generally accepted mechanism for silica condensation in which anionic silicate solution species are central to the condensation process. The results presented in this paper support the use of precursors such as silicon catecholate complexes in the study of biosilicification in vitro. Further detailed experimentation is needed to increase our understanding of specific biomolecule silica interactions that ultimately generate the complex, finely detailed siliceous structures we observe in the world around us.
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Affiliation(s)
- David J Belton
- Nottingham Trent University, School of Science and Technology, Clifton Lane, Nottingham NG11 8NS, United Kingdom
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47
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Monton MRN, Lebert JM, Little JRL, Nair JJ, McNulty J, Brennan JD. A Sol−Gel-Derived Acetylcholinesterase Microarray for Nanovolume Small-Molecule Screening. Anal Chem 2010; 82:9365-73. [PMID: 20949898 DOI: 10.1021/ac101949s] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maria Rowena N. Monton
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
| | - Julie M. Lebert
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
| | - Jessamyn R. L. Little
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
| | - Jerald James Nair
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
| | - James McNulty
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
| | - John D. Brennan
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. W, Hamilton, Ontario L8S 4M1, Canada
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Luckham RE, Brennan JD. Bioactive paper dipstick sensors for acetylcholinesterase inhibitors based on sol-gel/enzyme/gold nanoparticle composites. Analyst 2010; 135:2028-35. [PMID: 20593080 DOI: 10.1039/c0an00283f] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A bioactive paper-based colorimetric "dipstick" bioassay is reported that is based on acetylcholinesterase (AChE) catalyzed enlargement of gold nanoparticles that are co-entrapped with the enzyme in a sol-gel based silica material that is coated on a functionalized paper substrate. Test solutions containing acetylthiocholine (ATCh) and a Au(III) salt are spotted over the sensing area of the bioactive test strips containing small (3 nm diameter) primary gold nanoparticles (AuNP). Biocatalyzed hydrolysis of ATCh via AChE leads to formation of thiocholine, which in turn reduces the Au(III) onto the entrapped nanoparticles, producing particle growth and a concomitant increase in color intensity that can be correlated to the amount of substrate or inhibitor present in test solutions. The entrapped AuNP cannot leach from the silica material, leading to a bioactive paper assay that can utilize visual detection of a color change as a simple readout. Our results show that the dipstick based bioassay is sufficiently sensitive to allow for detection of Paraoxon over the concentration range of 500 nM to approximately 1 mM. Detection can be made by eye or using a digital camera and image analysis, making the assay suitable for remote analysis.
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Affiliation(s)
- Roger E Luckham
- Department of Chemistry, McMaster University, 1280 Main St. West, Hamilton, ON L8S 4M1, Canada
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Vila-Real H, Alfaia AJ, Rosa ME, Calado AR, Ribeiro MH. An innovative sol–gel naringinase bioencapsulation process for glycosides hydrolysis. Process Biochem 2010. [DOI: 10.1016/j.procbio.2010.02.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kulikova GA, Ryabinina IV, Parfenyuk EV. Effect of chemical nature of nanosized silica surface on the adsorption of D-glucose. COLLOID JOURNAL 2010. [DOI: 10.1134/s1061933x10020122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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