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Neural Differentiation Potential of Mesenchymal Stem Cells Enhanced by Biocompatible Chitosan-Gold Nanocomposites. Cells 2022; 11:cells11121861. [PMID: 35740991 PMCID: PMC9221394 DOI: 10.3390/cells11121861] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 05/28/2022] [Accepted: 06/04/2022] [Indexed: 02/04/2023] Open
Abstract
Chitosan (Chi) is a natural polymer that has been demonstrated to have potential as a promoter of neural regeneration. In this study, Chi was prepared with various amounts (25, 50, and 100 ppm) of gold (Au) nanoparticles for use in in vitro and in vivo assessments. Each as-prepared material was first characterized by UV-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR), atomic force microscopy (AFM), scanning electron microscopy (SEM), and Dynamic Light Scattering (DLS). Through the in vitro experiments, Chi combined with 50 ppm of Au nanoparticles demonstrated better biocompatibility. The platelet activation, monocyte conversion, and intracellular ROS generation was remarkably decreased by Chi–Au 50 pm treatment. Furthermore, Chi–Au 50 ppm could facilitate colony formation and strengthen matrix metalloproteinase (MMP) activation in mesenchymal stem cells (MSCs). The lower expression of CD44 in Chi–Au 50 ppm treatment demonstrated that the nanocomposites could enhance the MSCs undergoing differentiation. Chi–Au 50 ppm was discovered to significantly induce the expression of GFAP, β-Tubulin, and nestin protein in MSCs for neural differentiation, which was verified by real-time PCR analysis and immunostaining assays. Additionally, a rat model involving subcutaneous implantation was used to evaluate the superior anti-inflammatory and endothelialization abilities of a Chi–Au 50 ppm treatment. Capsule formation and collagen deposition were decreased. The CD86 expression (M1 macrophage polarization) and leukocyte filtration (CD45) were remarkably reduced as well. In summary, a Chi polymer combined with 50 ppm of Au nanoparticles was proven to enhance the neural differentiation of MSCs and showed potential as a biosafe nanomaterial for neural tissue engineering.
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Chitosan biofilms: Insights for the selective electromembrane extraction of fluoroquinolones from biological samples. Anal Chim Acta 2021; 1179:338832. [PMID: 34535259 DOI: 10.1016/j.aca.2021.338832] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 07/01/2021] [Accepted: 07/03/2021] [Indexed: 11/21/2022]
Abstract
A selective electromembrane extraction procedure for the extraction of Enrofloxacin, Marbofloxacin and Flumequine, usually employed as antibiotic in veterinarian use, is proposed by using a chitosan biofilm, composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336, as active biopolymeric support. The interaction mechanism occurring between the target drugs and the biopolymer has been deeply studied using the Quantum Theory of Atoms in Molecules. The obtained results show the interaction between the extracted fluoroquinolones and the biomembrane is stabilized by two hydrogen bonds formed between both the carboxyl and keto groups of the drugs with both the amine and hydroxyl groups of glucosamine in the biopolymer. The energetic results agree with the high extraction efficiency obtained for Marbofloxacin, Enrofloxacin and Flumequine in terms of enrichment factors (83, 82 and 58, respectively) in presence of other fluoroquinolones. Under optimum conditions, the proposed electromembrane extraction method exhibits wide linear ranges of 4.2-200 μg L-1, 5.6-200 μg L-1 and 5.1-200 μg L-1, respectively; low limits of detection close to 1.3 μg L-1 and appropriate repeatability (relative standard deviation values 4-7%).
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3
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Encased Gold Nanoparticle Synthesis as a Probe for Oleuropein Self-Assembled Structure Formation. MATERIALS 2020; 14:ma14010050. [PMID: 33374423 PMCID: PMC7794816 DOI: 10.3390/ma14010050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 11/17/2022]
Abstract
Stable oleuropein-coated gold nanoparticles in aqueous media were synthesized for the first time. Oleuropein (OLE) concentration in the reaction medium was found to greatly influence the outcome and stability of the resulting nanocolloid, with a marked decrease in particle size being found for the more concentrated oleuropein solutions. The protection mechanisms involved in the stabilized nanosystems were analyzed. Oleuropein self-assembled structures were found to be formed at a concentration threshold of [OLE] > 5 × 10−5 M, and observed through the use of CryoSEM imaging. Those structures were responsible for both the increased stability and the decrease in size observed at the more concentrated solutions.
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Tenório FS, Amaral Montanheiro TL, dos Santos AMI, Silva M, Lemes AP, Tada DB. Chitosan hydrogel covalently crosslinked by gold nanoparticle: Eliminating the use of toxic crosslinkers. J Appl Polym Sci 2020. [DOI: 10.1002/app.49819] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Fernanda Silva Tenório
- Laboratório de Nanomateriais e Nanotoxicologia Universidade Federal de São Paulo São Paulo Brazil
| | | | | | - Mateus Silva
- Polymer and Biopolymer Technology Laboratory Federal University of São Paulo São Paulo Brazil
| | - Ana Paula Lemes
- Polymer and Biopolymer Technology Laboratory Federal University of São Paulo São Paulo Brazil
| | - Dayane Batista Tada
- Laboratório de Nanomateriais e Nanotoxicologia Universidade Federal de São Paulo São Paulo Brazil
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5
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Franconetti A, López Ó, Fernandez-Bolanos JG. Carbohydrates: Potential Sweet Tools Against Cancer. Curr Med Chem 2020; 27:1206-1242. [DOI: 10.2174/0929867325666180719114150] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 04/25/2018] [Accepted: 06/28/2018] [Indexed: 12/13/2022]
Abstract
:Cancer, one of the most devastating degenerative diseases nowadays, is one of the main targets in Medicinal Chemistry and Pharmaceutical industry. Due to the significant increase in the incidence of cancer within world population, together with the complexity of such disease, featured with a multifactorial nature, access to new drugs targeting different biological targets connected to cancer is highly necessary.:Among the vast arsenal of compounds exhibiting antitumor activities, this review will cover the use of carbohydrate derivatives as privileged scaffolds. Their hydrophilic nature, together with their capacity of establishing selective interactions with biological receptors located on cell surface, involved in cell-to-cell communication processes, has allowed the development of an ample number of new templates useful in cancer treatment.:Their intrinsic water solubility has allowed their use as of pro-drug carriers for accessing more efficiently the pharmaceutical targets. The preparation of glycoconjugates in which the carbohydrate is tethered to a pharmacophore has also allowed a better permeation of the drug through cellular membranes, in which selective interactions with the carbohydrate motifs are involved. In this context, the design of multivalent structures (e.g. gold nanoparticles) has been demonstrated to enhance crucial interactions with biological receptors like lectins, glycoproteins that can be involved in cancer progression.:Moreover, the modification of the carbohydrate structural motif, by incorporation of metal complexes, or by replacing their endocyclic oxygen, or carbon atoms with heteroatoms has led to new antitumor agents.:Such diversity of sugar-based templates with relevant antitumor activity will be covered in this review.
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Affiliation(s)
- Antonio Franconetti
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
| | - Óscar López
- Departamento de Quimica Organica, Facultad de Quimica, Universidad de Sevilla, Sevilla, Spain
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6
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Citrate and Polyvinylpyrrolidone Stabilized Silver Nanoparticles as Selective Colorimetric Sensor for Aluminum (III) Ions in Real Water Samples. MATERIALS 2020; 13:ma13061373. [PMID: 32197492 PMCID: PMC7143323 DOI: 10.3390/ma13061373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/11/2020] [Accepted: 03/16/2020] [Indexed: 11/23/2022]
Abstract
The use of silver nanoparticles stabilized with citrate and polyvinylpyrrolidone as a sensor for aluminum ions determination is proposed in this paper. These non-functionalized and specific nanoparticles provide a highly selective and sensitive detection system for aluminum in acidic solutions. The synthesized nanoparticles were characterized by transmission electron microscopy. Surface plasmon band deconvolution analysis was applied to study the interaction between silver nanoparticles and aluminum ions in solution. The interaction band in the UV-visible region was used as an analytical signal for quantitation purposes. The proposed detection system offers an effective AND wide linearity range (0.1–103 nM), specificity for Al(III) in THE presence of other metallic ions in solution, as well as high sensitivity (limit of detection = 40.5 nM). The proposed silver-nanoparticles-based sensor WAS successfully used for detecting Al(III) in real water samples.
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López-Pérez G, Prado-Gotor R, Fuentes-Rojas JA, Martin-Valero MJ. Understanding gold nanoparticles interactions with chitosan: Crosslinking agents as novel strategy for direct covalent immobilization of biomolecules on metallic surfaces. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2019.112381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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8
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Diouf A, Moufid M, Bouyahya D, Österlund L, El Bari N, Bouchikhi B. An electrochemical sensor based on chitosan capped with gold nanoparticles combined with a voltammetric electronic tongue for quantitative aspirin detection in human physiological fluids and tablets. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 110:110665. [PMID: 32204094 DOI: 10.1016/j.msec.2020.110665] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 12/17/2019] [Accepted: 01/13/2020] [Indexed: 12/14/2022]
Abstract
Inflammatory diseases increase has recently sparked the research interest for drugs diagnostic tools development. At therapeutic doses, acetylsalicylic acid (ASA or aspirin) is widely used for these diseases' treatment. ASA overdoses can however give rise to adverse side effects including ulcers, gastric damage. Hence, development of simple, portable and sensitive methods for ASA detection is desirable. This paper reports aspirin analysis in urine, saliva and pharmaceutical tablet using an electrochemical sensor and a voltammetric electronic tongue (VE-Tongue). The electrochemical sensor was fabricated by self-assembling chitosan capped with gold nanoparticles (Cs + AuNPs) on a screen-printed carbon electrode (SPCE). It exhibits a logarithmic-linear relationship between its response and the ASA concentration in the range between 1 pg/mL and 1 μg/mL. A low detection limit (0.03 pg/mL), good selectivity against phenol and benzoic acid interference, and successful practical application were demonstrated. Qualitative analysis was performed using the VE-Tongue based unmodified metal electrodes combined with two chemometric approaches to classify urine samples spiked with different aspirin concentrations. Partial least squares (PLS) method provided prediction models obtained from the data of both devices with a regression correlation coefficient R2 = 0.99. Correspondingly, the SPCE/(Cs + AuNPs) electrochemical sensor and VE-Tongue could be viable tools for biological analysis of drugs.
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Affiliation(s)
- Alassane Diouf
- Sensor Electronic & Instrumentation Group, Department of Physics, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, Meknes, Morocco.; Biotechnology Agroalimentary and Biomedical Analysis Group, Department of Biology, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - Mohammed Moufid
- Sensor Electronic & Instrumentation Group, Department of Physics, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, Meknes, Morocco.; Biotechnology Agroalimentary and Biomedical Analysis Group, Department of Biology, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - Driss Bouyahya
- School of arts and humanities, Moulay Ismaïl University of Meknes, Morocco
| | - Lars Österlund
- Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, SE-75121 Uppsala, Sweden
| | - Nezha El Bari
- Biotechnology Agroalimentary and Biomedical Analysis Group, Department of Biology, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, 50003 Meknes, Morocco
| | - Benachir Bouchikhi
- Sensor Electronic & Instrumentation Group, Department of Physics, Faculty of Sciences, Moulay Ismaïl University of Meknes, B.P. 11201, Zitoune, Meknes, Morocco..
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Gubitosa J, Rizzi V, Fini P, Del Sole R, Lopedota A, Laquintana V, Denora N, Agostiano A, Cosma P. Multifunctional green synthetized gold nanoparticles/chitosan/ellagic acid self-assembly: Antioxidant, sun filter and tyrosinase-inhibitor properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 106:110170. [DOI: 10.1016/j.msec.2019.110170] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/05/2019] [Accepted: 09/05/2019] [Indexed: 02/02/2023]
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10
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Begines B, Alcudia A, Aguilera-Velazquez R, Martinez G, He Y, Trindade GF, Wildman R, Sayagues MJ, Jimenez-Ruiz A, Prado-Gotor R. Design of highly stabilized nanocomposite inks based on biodegradable polymer-matrix and gold nanoparticles for Inkjet Printing. Sci Rep 2019; 9:16097. [PMID: 31695064 PMCID: PMC6834569 DOI: 10.1038/s41598-019-52314-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 10/10/2019] [Indexed: 11/15/2022] Open
Abstract
Nowadays there is a worldwide growing interest in the Inkjet Printing technology owing to its potentially high levels of geometrical complexity, personalization and resolution. There is also social concern about usage, disposal and accumulation of plastic materials. In this work, it is shown that sugar-based biodegradable polyurethane polymers exhibit outstanding properties as polymer-matrix for gold nanoparticles composites. These materials could reach exceptional stabilization levels, and demonstrated potential as novel robust inks for Inkjet based Printing. Furthermore, a physical comparison among different polymers is discussed based on stability and printability experiments to search for the best ink candidate. The University of Seville logo was printed by employing those inks, and the presence of gold was confirmed by ToF-SIMS. This approach has the potential to open new routes and applications for fabrication of enhanced biomedical nanometallic-sensors using stabilized AuNP.
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Affiliation(s)
- Belen Begines
- Department of Organic and Medicinal Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain
| | - Ana Alcudia
- Department of Organic and Medicinal Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain
| | - Raul Aguilera-Velazquez
- Department of Organic and Medicinal Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain
| | - Guillermo Martinez
- Department of Organic and Medicinal Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain
| | - Yinfeng He
- Centre for Additive Manufacturing, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | - Gustavo F Trindade
- Centre for Additive Manufacturing, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
- Material Science Institute of Seville, CSIC/US, Seville, 41092, Spain
| | - Ricky Wildman
- Centre for Additive Manufacturing, Faculty of Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
| | | | - Aila Jimenez-Ruiz
- Department of Physical Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain.
| | - Rafael Prado-Gotor
- Department of Physical Chemistry, School of Pharmacy, University of Seville, Seville, 41012, Spain.
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11
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Franconetti A, Carnerero JM, Prado-Gotor R, Cabrera-Escribano F, Jaime C. Chitosan as a capping agent: Insights on the stabilization of gold nanoparticles. Carbohydr Polym 2019; 207:806-814. [DOI: 10.1016/j.carbpol.2018.12.046] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 12/12/2018] [Accepted: 12/16/2018] [Indexed: 01/17/2023]
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12
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Román-Hidalgo C, López-Pérez G, Martín-Valero MJ, Bello-López MÁ. Chitosan tailor-made membranes as biopolymeric support for electromembrane extraction. Talanta 2019; 199:290-295. [PMID: 30952260 DOI: 10.1016/j.talanta.2019.02.079] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 02/21/2019] [Accepted: 02/21/2019] [Indexed: 01/15/2023]
Abstract
A chitosan membrane composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336 has been proposed as a new biopolymeric support for electromembrane extraction. The new support has been characterized by Scanning Electron Microscopy, resulting a 30-35 µm thickness. Amoxicillin, nicotinic acid, hippuric acid, salicylic acid, anthranilic acid, ketoprofen, naproxen and ibuprofen have been successfully extracted using the proposed support. Better enrichment factors were obtained for the acidic polar analytes than for the non-steroidal anti-inflammatory compounds (ranging from 118 for hippuric acid and 20 for ibuprofen). Electromembrane extraction was developed applying a DC voltage of 100 V, 1-octanol as supported liquid membrane and 20 min of extraction. The target analytes have also been satisfactorily extracted from human urine samples, providing high extraction efficiencies. The chitosan membrane is presented as a promising alternative for supporting liquid membrane compared to commonly used materials for this purpose.
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Affiliation(s)
- Cristina Román-Hidalgo
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Seville, Spain
| | - Germán López-Pérez
- Department of Physical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Seville, Spain
| | - María Jesús Martín-Valero
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Seville, Spain.
| | - Miguel Ángel Bello-López
- Department of Analytical Chemistry, Faculty of Chemistry, Universidad de Sevilla, c/Prof. García González, s/n, 41012 Seville, Spain.
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13
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Blaško M, Mach P, Antušek A, Urban M. DFT Modeling of Cross-Linked Polyethylene: Role of Gold Atoms and Dispersion Interactions. J Phys Chem A 2018; 122:1496-1503. [DOI: 10.1021/acs.jpca.7b12232] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martin Blaško
- Department
of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská Dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Pavel Mach
- Department
of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics
and Informatics, Comenius University, Mlynská Dolina, 84248 Bratislava, Slovakia
| | - Andrej Antušek
- Advanced
Technologies Research Institute, Faculty of Materials Science and
Technology in Trnava, Slovak University of Technology in Bratislava, Bottova 25, 917 24 Trnava, Slovakia
| | - Miroslav Urban
- Department
of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská Dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
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14
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Tentor FR, de Oliveira JH, Scariot DB, Lazarin-Bidóia D, Bonafé EG, Nakamura CV, Venter SA, Monteiro JP, Muniz EC, Martins AF. Scaffolds based on chitosan/pectin thermosensitive hydrogels containing gold nanoparticles. Int J Biol Macromol 2017; 102:1186-1194. [DOI: 10.1016/j.ijbiomac.2017.04.106] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/24/2017] [Accepted: 04/26/2017] [Indexed: 12/22/2022]
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15
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Zaragoza J, Chang A, Asuri P. Effect of crosslinker length on the elastic and compression modulus of poly(acrylamide) nanocomposite hydrogels. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/790/1/012037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Collado-González M, Montalbán MG, Peña-García J, Pérez-Sánchez H, Víllora G, Díaz Baños FG. Chitosan as stabilizing agent for negatively charged nanoparticles. Carbohydr Polym 2016; 161:63-70. [PMID: 28189247 DOI: 10.1016/j.carbpol.2016.12.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/03/2016] [Accepted: 12/18/2016] [Indexed: 01/15/2023]
Abstract
Chitosan is a biocompatible polysaccharide with positive Z potential which can stabilize negative charged nanoparticles. Silk fibroin nanoparticles and citrate gold nanoparticles, both with negative Z potential, but they form aggregates at physiological ionic strength. In this work, we study the behavior of chitosan in solution when the ionic strength of the medium is increased and how the concentration of chitosan and the proportion of the two components (chitosan and AuNP or SFN) significantly affect the stability and size of the nanocomposites formed. In addition to experimental measurements, molecular modeling were used to gain insight into how chitosan interacts with silk fibroin monomers, and to identify the main energetic interactions involved in the process. The optimum values for obtaining the smallest and most homogeneous stable nanocomposites were obtained and two different ways of organization through which chitosan may exert its stabilizing effect were suggested.
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Affiliation(s)
| | | | - Jorge Peña-García
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica San Antonio de Murcia (UCAM), Murcia, Spain
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica San Antonio de Murcia (UCAM), Murcia, Spain
| | - Gloria Víllora
- Department of Chemical Engineering, University of Murcia, Murcia, Spain
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17
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Zaragoza J, Babhadiashar N, O’Brien V, Chang A, Blanco M, Zabalegui A, Lee H, Asuri P. Experimental Investigation of Mechanical and Thermal Properties of Silica Nanoparticle-Reinforced Poly(acrylamide) Nanocomposite Hydrogels. PLoS One 2015; 10:e0136293. [PMID: 26301505 PMCID: PMC4547727 DOI: 10.1371/journal.pone.0136293] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/31/2015] [Indexed: 11/22/2022] Open
Abstract
Current studies investigating properties of nanoparticle-reinforced polymers have shown that nanocomposites often exhibit improved properties compared to neat polymers. However, over two decades of research, using both experimental studies and modeling analyses, has not fully elucidated the mechanistic underpinnings behind these enhancements. Moreover, few studies have focused on developing an understanding among two or more polymer properties affected by incorporation of nanomaterials. In our study, we investigated the elastic and thermal properties of poly(acrylamide) hydrogels containing silica nanoparticles. Both nanoparticle concentration and size affected hydrogel properties, with similar trends in enhancements observed for elastic modulus and thermal diffusivity. We also observed significantly lower swellability for hydrogel nanocomposites relative to neat hydrogels, consistent with previous work suggesting that nanoparticles can mediate pseudo crosslinking within polymer networks. Collectively, these results indicate the ability to develop next-generation composite materials with enhanced mechanical and thermal properties by increasing the average crosslinking density using nanoparticles.
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Affiliation(s)
- Josergio Zaragoza
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
| | - Nasim Babhadiashar
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
| | - Victor O’Brien
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
| | - Andrew Chang
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
| | - Matthew Blanco
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
| | - Aitor Zabalegui
- Department of Mechanical Engineering, Santa Clara University, Santa Clara, California, United States of America
| | - Hohyun Lee
- Department of Mechanical Engineering, Santa Clara University, Santa Clara, California, United States of America
- * E-mail: (HL); (PA)
| | - Prashanth Asuri
- Department of Bioengineering, Santa Clara University, Santa Clara, California, United States of America
- * E-mail: (HL); (PA)
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18
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McCann J, Behrendt JM, Yan J, Halacheva S, Saunders BR. Poly(vinylamine) microgel–dextran composite hydrogels: Characterisation; properties and pH-triggered degradation. J Colloid Interface Sci 2015; 449:21-30. [DOI: 10.1016/j.jcis.2014.09.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/16/2014] [Accepted: 09/17/2014] [Indexed: 10/24/2022]
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19
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Nivethaa EAK, Dhanavel S, Narayanan V, Vasu CA, Stephen A. An in vitro cytotoxicity study of 5-fluorouracil encapsulated chitosan/gold nanocomposites towards MCF-7 cells. RSC Adv 2015. [DOI: 10.1039/c4ra11615a] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Schematic outlining the synthesis of 5FU loaded CS/Au nanocomposite and its application.
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Affiliation(s)
- E. A. K. Nivethaa
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
| | - S. Dhanavel
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
| | - V. Narayanan
- Department of Inorganic Chemistry
- University of Madras
- Chennai 600 025
- India
| | - C. Arul Vasu
- Department of Zoology
- University of Madras
- Chennai 600 025
- India
| | - A. Stephen
- Material Science Centre
- Department of Nuclear Physics
- University of Madras
- Chennai-25
- India
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20
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Franconetti A, Contreras-Bernal L, Prado-Gotor R, Cabrera-Escribano F. Synthesis of hyperpolarizable biomaterials at molecular level based on pyridinium–chitosan complexes. RSC Adv 2015. [DOI: 10.1039/c5ra09397j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Novel types of fluorescent and quaternized pyridinium–chitosan derivatives have been synthesized and their characteristics as potential NLO-phore biomaterials have been disclosed by DFT calculations.
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Affiliation(s)
- Antonio Franconetti
- Departamento de Química Orgánica
- Facultad de Química
- Universidad de Sevilla
- 41012 Sevilla
- Spain
| | - Lidia Contreras-Bernal
- Departamento de Química Orgánica
- Facultad de Química
- Universidad de Sevilla
- 41012 Sevilla
- Spain
| | - Rafael Prado-Gotor
- Departamento de Química Física
- Facultad de Química
- Universidad de Sevilla
- 41012 Sevilla
- Spain
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