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Huang Z, Moiseev RV, Melides SS, Bae W, Jurewicz I, Khutoryanskiy VV, Keddie JL. Pickering emulsions stabilised with oligoglycine-functionalised nanodiamond as a model system for ocular drug delivery applications. SOFT MATTER 2023; 19:5513-5526. [PMID: 37434584 DOI: 10.1039/d3sm00495c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/13/2023]
Abstract
Oil-in-water emulsions, stabilised with conventional surfactants, are commonly used in eye drops for ocular drug delivery. However, the presence of surfactants can sometimes irritate tissues. Furthermore, conventional emulsions often have poor retention on ocular tissue. Pickering emulsions stabilised with nanoparticles have been gaining attention in recent years for a range of biomedical applications because of their biocompatibility. Here, Pickering emulsions were evaluated for the first time for the confinement of organic components for potential application in ocular drug delivery. For a model system, we used nanodiamond (ND) nanoparticles functionalised with covalently-bonded two-tail (2T) oligoglycine C10(NGly4)2 to make Pickering oil-in-water emulsions, which were stable over three months of storage under neutral pH. We proved the non-toxicity of ND-2T Pickering emulsions, comparable to buffer solution, via an ex vivo bovine corneal permeability and opacity test. The retention of the oil phase in the ND-2T stabilised emulsions on corneal tissue is significantly increased because of the mucoadhesive properties arising from the positively-charged terminal amino groups of 2T. Our formulated emulsions have a surface tension, pH and salt concentration comparable to that of tear fluid. The high retention of the ND-2T-stabilised emulsions on the corneal surface, in combination with their non-toxicity, gives them distinct advantages for ocular drug delivery. The principles of this model system could be applied in the future design of a range of formulations for drug delivery.
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Affiliation(s)
- Zhiwei Huang
- School of Mathematics and Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
| | - Roman V Moiseev
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading, RG6 6DX, UK
- Physicochemical, Ex Vivo and Invertebrates Tests and Analysis Centre (PEVITAC), University of Reading, Whiteknights, Reading, RG6 6DX, UK
| | - Solomon S Melides
- School of Mathematics and Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
| | - Wooli Bae
- School of Mathematics and Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
| | - Izabela Jurewicz
- School of Mathematics and Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
| | - Vitaliy V Khutoryanskiy
- Reading School of Pharmacy, University of Reading, Whiteknights, Reading, RG6 6DX, UK
- Physicochemical, Ex Vivo and Invertebrates Tests and Analysis Centre (PEVITAC), University of Reading, Whiteknights, Reading, RG6 6DX, UK
| | - Joseph L Keddie
- School of Mathematics and Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, GU2 7XH, UK.
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2
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Domínguez M, Oliver S, Garriga R, Muñoz E, Cebolla VL, de Marcos S, Galbán J. Tectomer-Mediated Optical Nanosensors for Tyramine Determination. SENSORS (BASEL, SWITZERLAND) 2023; 23:2524. [PMID: 36904726 PMCID: PMC10007293 DOI: 10.3390/s23052524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 06/18/2023]
Abstract
The development of optical sensors for in situ testing has become of great interest in the rapid diagnostics industry. We report here the development of simple, low-cost optical nanosensors for the semi-quantitative detection or naked-eye detection of tyramine (a biogenic amine whose production is commonly associated with food spoilage) when coupled to Au(III)/tectomer films deposited on polylactic acid (PLA) supports. Tectomers are two-dimensional oligoglycine self-assemblies, whose terminal amino groups enable both the immobilization of Au(III) and its adhesion to PLA. Upon exposure to tyramine, a non-enzymatic redox reaction takes place in which Au(III) in the tectomer matrix is reduced by tyramine to gold nanoparticles, whose reddish-purple color depends on the tyramine concentration and can be identified by measuring the RGB coordinates (Red-Green-Blue coordinates) using a smartphone color recognition app. Moreover, a more accurate quantification of tyramine in the range from 0.048 to 10 μM could be performed by measuring the reflectance of the sensing layers and the absorbance of the characteristic 550 nm plasmon band of the gold nanoparticles. The relative standard deviation (RSD) of the method was 4.2% (n = 5) with a limit of detection (LOD) of 0.014 μM. A remarkable selectivity was achieved for tyramine detection in the presence of other biogenic amines, especially histamine. This methodology, based on the optical properties of Au(III)/tectomer hybrid coatings, is promising for its application in food quality control and smart food packaging.
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Affiliation(s)
- Mario Domínguez
- Nanosensors and Bioanalytical Systems (N&SB), Analytical Chemistry Department, Faculty of Sciences, Instituto de Nanociencia y Materiales de Aragón (INMA University of Zaragoza-CSIC), 50009 Zaragoza, Spain
| | - Sofía Oliver
- Nanosensors and Bioanalytical Systems (N&SB), Analytical Chemistry Department, Faculty of Sciences, Instituto de Nanociencia y Materiales de Aragón (INMA University of Zaragoza-CSIC), 50009 Zaragoza, Spain
| | - Rosa Garriga
- Departamento de Química-Física, University of Zaragoza, 50009 Zaragoza, Spain
| | - Edgar Muñoz
- Instituto de Carboquímica ICB-CSIC, 50018 Zaragoza, Spain
| | | | - Susana de Marcos
- Nanosensors and Bioanalytical Systems (N&SB), Analytical Chemistry Department, Faculty of Sciences, Instituto de Nanociencia y Materiales de Aragón (INMA University of Zaragoza-CSIC), 50009 Zaragoza, Spain
| | - Javier Galbán
- Nanosensors and Bioanalytical Systems (N&SB), Analytical Chemistry Department, Faculty of Sciences, Instituto de Nanociencia y Materiales de Aragón (INMA University of Zaragoza-CSIC), 50009 Zaragoza, Spain
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3
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Huang Z, Calicchia E, Jurewicz I, Muñoz E, Garriga R, Portale G, Howlin BJ, Keddie JL. Two-Dimensional Triblock Peptide Assemblies for the Stabilization of Pickering Emulsions with pH Responsiveness. ACS APPLIED MATERIALS & INTERFACES 2022; 14:53228-53240. [PMID: 36378993 PMCID: PMC9716523 DOI: 10.1021/acsami.2c17558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/02/2022] [Indexed: 06/16/2023]
Abstract
A variety of two-dimensional (2D) nanomaterials, including graphene oxide and clays, are known to stabilize Pickering emulsions to fabricate structures for functions in sensors, catalysts, and encapsulation. We introduce here a novel Pickering emulsion using self-assembled amphiphilic triblock oligoglycine as the emulsifier. Peptide amphiphiles are more responsive to environmental changes (e.g., pH, temperature, and ionic strength) than inorganic 2D materials, which have a chemically rigid, in-plane structure. Noncovalent forces between the peptide molecules change with the environment, thereby imparting responsiveness. We provide new evidence that the biantennary oligoglycine, Gly4-NH-C10H20-NH-Gly4, self-assembles into 2D platelet structures, denoted as tectomers, in solution at a neutral buffered pH using small-angle X-ray scattering and molecular dynamics simulations. The molecules are stacked in the platelets with a linear conformation, rather than in a U-shape. We discovered that the lamellar oligoglycine platelets adsorbed at an oil/water interface and stabilized oil-in-water emulsions. This is the first report of 2D oligoglycine platelets being used as a Pickering stabilizer. The emulsions showed a strong pH response in an acidic environment. Thus, upon reducing the pH, the protonation of the terminal amino groups of the oligoglycine induced disassembly of the lamellar structure due to repulsive electrostatic forces, leading to emulsion destabilization. To demonstrate the application of the material, we show that a model active ingredient, β-carotene, in the oil is released upon decreasing the pH. Interestingly, in pH 9 buffer, the morphology of the oil droplets evolved over time, as the oligoglycine stabilizer created progressively a thicker interfacial layer. This demonstration opens a new route to use self-assembled synthetic peptide amphiphiles to stabilize Pickering emulsions, which can be significant for biomedical and pharmaceutical applications.
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Affiliation(s)
- Zhiwei Huang
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
| | - Eleonora Calicchia
- Groningen
Research Institute of Pharmacy, University
of Groningen, A. Deusinglaan 1, Groningen9713 AV, The Netherlands
- Zernike
Institute for Advanced Materials, Faculty of Mathematics and Natural
Sciences, University of Groningen, Nijenborgh 4, Groningen9747AG, The
Netherlands
| | - Izabela Jurewicz
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
| | - Edgar Muñoz
- Instituto
de Carboquímica ICB-CSIC, Miguel Luesma Castán 4, 50018Zaragoza, Spain
| | - Rosa Garriga
- Departamento
de Química Física, Universidad
de Zaragoza, 50009Zaragoza, Spain
| | - Giuseppe Portale
- Zernike
Institute for Advanced Materials, Faculty of Mathematics and Natural
Sciences, University of Groningen, Nijenborgh 4, Groningen9747AG, The
Netherlands
| | - Brendan J. Howlin
- Department
of Chemistry, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, U.K.
| | - Joseph L. Keddie
- Department
of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, GuildfordGU2 7XH, U.K.
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Arabadzhieva D, Gyurova AY, Minkov I, Chinarev A, Mileva E. Fine-tuning of bulk and interfacial characteristics of two-antennary oligoglycines in aqueous solutions. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang B, Yu Q, Liu Y. Alternating Magnetic Field Controlled Targeted Drug Delivery Based on Graphene Oxide‐Grafted Nanosupramolecules. Chemistry 2020; 26:13698-13703. [DOI: 10.1002/chem.202003328] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Indexed: 12/23/2022]
Affiliation(s)
- Bing Zhang
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 P.R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 P. R. China
| | - Qilin Yu
- Key Laboratory of Molecular Microbiology and Technology Ministry of Education College of Life Sciences Nankai University Tianjin 300071 P.R. China
| | - Yu Liu
- College of Chemistry State Key Laboratory of Elemento-Organic Chemistry Nankai University Tianjin 300071 P.R. China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 P. R. China
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6
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Warkentin E, Weidenweber S, Schühle K, Demmer U, Heider J, Ermler U. A rare polyglycine type II-like helix motif in naturally occurring proteins. Proteins 2017; 85:2017-2023. [DOI: 10.1002/prot.25355] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/03/2017] [Accepted: 07/17/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Eberhard Warkentin
- Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3; Frankfurt am Main 60438 Germany
| | - Sina Weidenweber
- Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3; Frankfurt am Main 60438 Germany
| | - Karola Schühle
- Laboratorium für Mikrobiologie; Fachbereich Biologie and SYNMIKRO, Philipps-Universität; Marburg 35032 Germany
| | - Ulrike Demmer
- Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3; Frankfurt am Main 60438 Germany
| | - Johann Heider
- Laboratorium für Mikrobiologie; Fachbereich Biologie and SYNMIKRO, Philipps-Universität; Marburg 35032 Germany
| | - Ulrich Ermler
- Max-Planck-Institut für Biophysik, Max-von-Laue-Str. 3; Frankfurt am Main 60438 Germany
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Garriga R, Jurewicz I, Seyedin S, Bardi N, Totti S, Matta-Domjan B, Velliou EG, Alkhorayef MA, Cebolla VL, Razal JM, Dalton AB, Muñoz E. Multifunctional, biocompatible and pH-responsive carbon nanotube- and graphene oxide/tectomer hybrid composites and coatings. NANOSCALE 2017; 9:7791-7804. [PMID: 28186213 DOI: 10.1039/c6nr09482a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here we present a route for non-covalent functionalization of carboxylated multi-walled carbon nanotubes and graphene oxide with novel two-dimensional peptide assemblies. We show that self-assembled amino-terminated biantennary and tetraantennary oligoglycine peptides (referred to as tectomers) effectively coat carboxylated multi-walled carbon nanotubes and also strongly interact with graphene oxide due to electrostatic interactions and hydrogen bonding as the driving force, respectively. The resulting hybrids can be made into free-standing conducting composites or applied in the form of thin, pH-switchable bioadhesive coatings onto graphene oxide fibers. Monitoring of cell viability of pancreatic cell lines, seeded on those CNT hybrids, show that they can be used as two- and three-dimensional scaffolds to tissue engineer tumour models for studying ex vivo the tumour development and response to treatment. This highly versatile method in producing pH-responsive hybrids and coatings offers an attractive platform for a variety of biomedical applications and for the development of functional materials such as smart textiles, sensors and bioelectronic devices.
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Affiliation(s)
- Rosa Garriga
- Departamento de Química Física, Universidad de Zaragoza, 50009 Zaragoza, Spain
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8
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Gyurova AY, Michna A, Nikolov L, Mileva E. Self-assembly of four- and two-antennary oligoglycines in aqueous medium. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2016.09.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Padmapriya K, Barthwal R. Nuclear magnetic resonance studies reveal stabilization of parallel G-quadruplex DNA [d(T 2 G 4 T)] 4 upon binding to protoberberine alkaloid coralyne. Bioorg Med Chem Lett 2016; 26:4915-4918. [DOI: 10.1016/j.bmcl.2016.09.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 09/02/2016] [Accepted: 09/06/2016] [Indexed: 12/17/2022]
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