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Zenjanab MK, Pakchin PS, Fathi M, Abdolahinia ED, Adibkia K. Niosomes containing paclitaxel and gold nanoparticles with different coating agents for efficient chemo/photothermal therapy of breast cancer. Biomed Mater 2024; 19:035015. [PMID: 38422524 DOI: 10.1088/1748-605x/ad2ed5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 02/29/2024] [Indexed: 03/02/2024]
Abstract
Breast cancer (BC) is one of the most common cancers in women, and chemotherapy is usually used to overcome this cancer. To improve drug delivery to cancer sites and reduce their side effects, nanocarriers such as niosomes (NIOs) are used. Moreover, a combination of other therapeutic methods like photothermal therapy (PTT) can help to enhance the chemotherapy effect. The aim of this research is the design a nanocarrier that simultaneously delivers chemotherapy and PTT agents. To achieve this goal, NIOs containing paclitaxel (PTX) as a chemotherapeutic agent and spherical gold nanoparticles (AuNPs) coated with citrate, chitosan (CS), and polyamidoamine (PAMAM) as a PTT agent were synthesized by thin hydration methods. Their physicochemical properties were determined by dynamic light scattering, UV-Vis, Fourier-transform infrared spectroscopy (FT-IR), and scanning electron microscopy (SEM) analysis. Cellular uptake, cell cytotoxicity, hyperthermia, and apoptosis effects of the proposed system were investigated in the MCF-7 BC cell line. The cellular uptake of NIOs/AuNPs-PAMAM (99.21%) and NIOs/AuNPs-CS (98.93%) by MCF-7 cells was higher than that of NIOs/AuNPs (79.55%), demonstrating that surface charge plays a key role in the cellular uptake of NPs. The MTT assay showed the cell viability of 45.48% for NIOs/AuNPs/PTX, 34.24% for NIOs/AuNPs-CS/PTX, and 37.67% for NIOs/AuNPs-PAMAM/PTX after 48 h of treatment. However, the application of hyperthermia significantly decreased the viability of cells treated with NIOs/AuNPs/PTX (37.72%), NIOs/AuNPs-CS/PTX (10.49%), and NIOs/AuNPs-PAMAM/PTX (4.1%) after 48 h. The apoptosis rate was high in NIOs/AuNPs-PAMAM/PTX (53.24%) and NIOs/AuNPs-CS/PTX (55.4%) confirming the data from MTT. In conclusion, the result revealed that combined PTT with chemotherapy increased cell cytotoxicity effects against the MCF-7 cells, and the AuNPs with various coating agents affected cellular uptake and hyperthermia which can be considered for efficient BC therapy.
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Affiliation(s)
- Masuomeh Kaveh Zenjanab
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Parvin Samadi Pakchin
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marziyeh Fathi
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Elaheh Dalir Abdolahinia
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Khosro Adibkia
- Research Center for Pharmaceutical Nanotechnology, Biomedicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutics, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
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Mohamed AA, Fayyad DM, El-Telbany M, Mohamed DAA. Antibacterial biofilm efficacy of calcium hydroxide loaded on Gum Arabic nanocarrier: an in-vitro study. BMC Oral Health 2024; 24:215. [PMID: 38341565 PMCID: PMC10859034 DOI: 10.1186/s12903-024-03941-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
BACKGROUND An innovative intracanal medication formulation was introduced in the current study to improve the calcium hydroxide (Ca(OH)2) therapeutic capability against resistant Enterococcus faecalis (E. faecalis) biofilm. This in-vitro study aimed to prepare, characterize, and evaluate the antibacterial efficiency of Ca(OH)2 loaded on Gum Arabic (GA) nanocarrier (Ca(OH)2-GA NPs) and to compare this efficiency with conventional Ca(OH)2, Ca(OH)2 nanoparticles (NPs), GA, and GA NPs. MATERIALS AND METHODS The prepared nanoparticle formulations for the tested medications were characterized using Transmission Electron Microscope (TEM) and Fourier-Transform Infrared Spectroscopy (FTIR). 141 human mandibular premolars were selected, and their root canals were prepared. Twenty-one roots were then sectioned into 42 tooth slices. All prepared root canals (n = 120) and teeth slices (n = 42) were divided into six groups according to the intracanal medication used. E. faecalis was inoculated in the samples for 21 days to form biofilms, and then the corresponding medications were applied for 7 days. After medication application, the residual E. faecalis bacteria were assessed using CFU, Q-PCR, and SEM. Additionally, the effect of Ca(OH)2-GA NPs on E. faecalis biofilm genes (agg, ace, and efaA) was investigated using RT-PCR. Data were statistically analyzed at a 0.05 level of significance. RESULTS The synthesis of NPs was confirmed using TEM. The results of the FTIR proved that the Ca(OH)2 was successfully encapsulated in the GA NPs. Ca(OH)2-GA NPs caused a significant reduction in the E. faecalis biofilm gene expression when compared to the control (p < 0.001). There were significant differences in the E. faecalis CFU mean count and CT mean values between the tested groups (p < 0.001) except between the Ca(OH)2 and GA CFU mean count. Ca(OH)2-GA NPs showed the least statistical E. faecalis mean count among other groups. SEM observation showed that E. faecalis biofilm was diminished in all treatment groups, especially in the Ca(OH)2-GA NPS group when compared to the control group. CONCLUSIONS Ca(OH)2 and GA nanoparticles demonstrate superior anti-E. faecalis activity when compared to their conventional counterparts. Ca(OH)2-GA NPs showed the best antibacterial efficacy in treating E. faecalis biofilm. The tested NP formulations could be considered as promising intracanal medications.
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Affiliation(s)
- Alshafey Alsayed Mohamed
- Department of Endodontics, Faculty of Dentistry, Suez Canal University, 4.5 Ring Road, Ismailia, 41522, Egypt
| | - Dalia Mukhtar Fayyad
- Department of Endodontics, Faculty of Dentistry, Suez Canal University, 4.5 Ring Road, Ismailia, 41522, Egypt
| | - Mohamed El-Telbany
- Microbiology and Botany Department, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt
- Department of Bioscience and Biotechnology, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744 Motooka, Nishi-Ku, Fukuoka, 819-0395, Japan
| | - Dalia Abd-Allah Mohamed
- Department of Endodontics, Faculty of Dentistry, Suez Canal University, 4.5 Ring Road, Ismailia, 41522, Egypt.
- Department of Endodontics, Faculty of Dentistry, Sinai University, Kantara, Ismailia, Egypt.
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Rosales TKO, da Silva FFA, Bernardes ES, Paulo Fabi J. Plant-derived polyphenolic compounds: nanodelivery through polysaccharide-based systems to improve the biological properties. Crit Rev Food Sci Nutr 2023:1-25. [PMID: 37585699 DOI: 10.1080/10408398.2023.2245038] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Abstract
Plant-derived polyphenols are naturally occurring compounds widely distributed in plants. They have received greater attention in the food and pharmaceutical industries due to their potential health benefits, reducing the risk of some chronic diseases due to their antioxidant, anti-inflammatory, anticancer, cardioprotective, and neuro-action properties. Polyphenolic compounds orally administered can be used as adjuvants in several treatments but with restricted uses due to chemical instability. The review discusses the different structural compositions of polyphenols and their influence on chemical stability. Despite the potential and wide applications, there is a need to improve the delivery of polyphenolics to target the human intestine without massive chemical modifications. Oral administration of polyphenols is unfeasible due to instability, low bioaccessibility, and limited bioavailability. Nano-delivery systems based on polysaccharides (starch, pectin, chitosan, and cellulose) have been identified as a viable option for oral ingestion, potentiate biological effects, and direct-controlled delivery in specific tissues. The time and dose can be individualized for specific diseases, such as intestinal cancer. This review will address the mechanisms by which polysaccharides-based nanostructured systems can protect against degradation and enhance intestinal permeation, oral bioavailability, and the potential application of polysaccharides as nanocarriers for the controlled and targeted delivery of polyphenolic compounds.
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Affiliation(s)
- Thiécla Katiane Osvaldt Rosales
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
- Instituto de Pesquisa Energéticas e Nucleares - IPEN, São Paulo, SP, Brazil
| | | | | | - João Paulo Fabi
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
- Food Research Center (FoRC), CEPID-FAPESP (Research, Innovation and Dissemination Centers, São Paulo Research Foundation), São Paulo, SP, Brazil
- Food and Nutrition Research Center (NAPAN), University of São Paulo, São Paulo, SP, Brazil
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Maheo A, Vithiya B SM, Arul Prasad T A, Mangesh VL, Perumal T, Al-Qahtani WH, Govindasamy M. Cytotoxic, Antidiabetic, and Antioxidant Study of Biogenically Improvised Elsholtzia blanda and Chitosan-Assisted Zinc Oxide Nanoparticles. ACS OMEGA 2023; 8:10954-10967. [PMID: 37008090 PMCID: PMC10061636 DOI: 10.1021/acsomega.2c07530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 02/06/2023] [Indexed: 06/19/2023]
Abstract
In the present study, we have improvised a biogenic method to fabricate zinc oxide nanoparticles (ZnO NPs) using chitosan and an aqueous extract of the leaves of Elsholtzia blanda. Characterization of the fabricated products was carried out with the help of ultraviolet-visible, Fourier transform infrared, X-ray diffraction, field emission scanning electron microscopy, high-resolution transmission electron microscopy, selected area electron diffraction, and energy-dispersive X-ray analyses. The size of the improvised ZnO NP measured between 20 and 70 nm and had a spherical and hexagonal shape. The ZnO NPs proved to be highly effective in the antidiabetic test as the sample showed the highest percentage of enzyme inhibition at 74% ± 3.7, while in the antioxidant test, 78% was the maximum percentage of 2,2-diphenyl-1-picrylhydrazyl hydrate scavenging activity. The cytotoxic effect was investigated against the human osteosarcoma (MG-63) cell line, and the IC50 value was 62.61 μg/mL. Photocatalytic efficiency was studied by the degradation of Congo red where 91% of dye degradation was observed. From the various analyses, it can be concluded that the as-synthesized NPs may be suitable for various biomedical applications as well as for environmental remediation.
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Affiliation(s)
- Athisa
Roselyn Maheo
- PG
and Research Department of Chemistry, Auxilium
College (Autonomous) (Affiliated to Thiruvalluvar University, Serkadu), Vellore 632006, India
| | - Scholastica Mary Vithiya B
- PG
and Research Department of Chemistry, Auxilium
College (Autonomous) (Affiliated to Thiruvalluvar University, Serkadu), Vellore 632006, India
| | - Augustine Arul Prasad T
- PG
and Research Department of Chemistry, Dwarakadoss
Goverdhandoss Vaishnav College (Autonomous) (Affiliated to University
of Madras), Chennai 600106, India
| | - V. L. Mangesh
- Department
of Mechanical Engineering, Koneru Lakshmaiah
Education Foundation, Vaddeswaram, Guntur 522502, Andhra
Pradesh, India
| | - Tamizhdurai Perumal
- PG
and Research Department of Chemistry, Dwarakadoss
Goverdhandoss Vaishnav College (Autonomous) (Affiliated to University
of Madras), Chennai 600106, India
| | - Wahidah H. Al-Qahtani
- Department
of Food Sciences & Nutrition, College of Food & Agriculture
Sciences, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mani Govindasamy
- Faculty,
International Ph.D. Program in Innovative Technology of Biomedical
Engineering and Medical Devices, Ming Chi
University of Technology, New Taipei
City 243303, Taiwan
- Adjunct
Faculty,
Department of Research and Innovation, Saveetha School of Engineering, SIMATS, Thandalam, Chennai 602105, India
- Korea
University of Technology and Education, Cheonan-si 31253, Chungcheongnam-do, Republic of Korea
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Adwin Jose P, Sankarganesh M, Dhaveethu Raja J, Senthilkumar GS, Nandini Asha R, Raja SJ, Sheela CD. Bio-inspired nickel nanoparticles of pyrimidine-Schiff base: In vitro anticancer, BSA and DNA interactions, molecular docking and antioxidant studies. J Biomol Struct Dyn 2022; 40:10715-10729. [PMID: 34243683 DOI: 10.1080/07391102.2021.1947382] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
In this work, interactions of pyrimidine derivative Schiff base ligand (DMPMM) were studied and its stabilized powder nickel nanoparticles (DMPMM-NiNPs) were synthesized and various biological studies were evaluated. DNA binding studies of CT-DNA with prepared compounds in Tris-HCl/NaCl buffer were carried out by traditional UV-Visible and fluorescence spectroscopic methods, viscosity measurements and cyclic voltammetry. Results showed that the small scale of DMPMM had less activity to interact with biological systems and when it assembled on nickel nanoparticles surface the activity increased. Thermal denaturation and sonochemical denaturation studies of DNA with the presence and the absence of our compounds also were done by UV-Visible spectroscopic method and its results indicated that the synthesized compounds increased the denaturation temperature. BSA binding studies of synthesized compounds were done by UV-Visible and fluorescence spectroscopy. Molecular docking of prepared ligand and its nanoparticles with biomolecules (DNA and BSA) were studied. Antimicrobial studies of the DMPMM and DMPMM-NiNPs were carried out by Agar-Agar well diffusion method. Anticancer studies results evidenced that the synthesized DMPMM-NiNPs had good selectivity to control the growth of cancer cells without damaging the normal cells. Various antioxidant scavenging studies results have shown that DMPMM and DMPMM-NiNPs have significant antioxidant activity. HighlightsStable and solid nickel nanoparticles were prepared.The size of the prepared nickel nanoparticles was nearly 3 to 8 nm.Organic ligand capped nickel nanoparticles interacted with DNA and BSA.Ni nanoparticles increased the denaturation temperature of DNA.It was found to have good anticancer activity with fewer side effects than cisplatin.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Paulraj Adwin Jose
- Chemistry Research Centre, Mohamed Sathak Engineering College, Kilakarai, Tamil Nadu, India
| | - Murugesan Sankarganesh
- Department of Chemistry, The American College, Madurai, Tamil Nadu, India.,Laboratory of Inorganic Synthesis and Bioinspired Catalysis, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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AuNP/Chitosan Nanocomposites Synthesized through Plasma Induced Liquid Chemistry and Their Applications in Photothermal Induced Bacteria Eradication. Pharmaceutics 2022; 14:pharmaceutics14102147. [PMID: 36297582 PMCID: PMC9611015 DOI: 10.3390/pharmaceutics14102147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/25/2022] [Accepted: 10/08/2022] [Indexed: 11/17/2022] Open
Abstract
In this work, a facile direct current atmospheric pressure micro-plasma (APM) technology was deployed for the synthesis of functional gold nanoparticle/chitosan (AuNP/CS) nanocomposites for the first time. Different experimental parameters, such as metal salt precursor concentration and chitosan viscosity, have been investigated to understand their effects on the resulting nanocomposite structures and properties. The nanocomposites were fully characterized using a wide range of material characterization techniques such as UV–vis, transmission electron microscope (TEM), Fourier transform infrared (FTIR) spectra and X-ray photoelectron spectroscopy (XPS) analyses. Potential reaction pathways have been proposed for the nanocomposite synthesis process. Finally, potential of the synthesized nanocomposites towards photothermal conversion and bacteria eradiation applications has been demonstrated. The results show that APM is a facile, rapid and versatile technique for the synthesis of AuNP/CS functional nanocomposites. Through this work, a more in-depth understanding of the multi-phase system (consisting of gas, plasma, liquid and solid) has been established and such understanding could shine a light on the future design and fabrication of new functional nanocomposites deploying the APM technique.
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Bulut O, Yilmaz MD. Catalytic evaluation of biocompatible chitosan-stabilized gold nanoparticles on oxidation of morin. Carbohydr Polym 2021; 258:117699. [PMID: 33593570 DOI: 10.1016/j.carbpol.2021.117699] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/21/2021] [Accepted: 01/22/2021] [Indexed: 11/16/2022]
Abstract
Herein, we present a study on the catalytic evaluation of biocompatible chitosan-stabilized gold nanoparticles (CH-AuNPs) on the oxidation of morin as a model reaction. Biocompatible CH-AuNPs have been characterized through several analytical methods such as TEM, UV-vis, DLS and zeta potential analyses. CH-AuNPs have a small size (10 ± 0.4 nm) with a narrow size distribution and high positive surface charge (+40.1 mV). CH-AuNPs has been demonstrated to be highly active nanocatalysts for the oxidation of morin with the assistance of H2O2 as an oxidant compared with control experiments. The oxidation reaction follows a pseudo-first-order reaction. The kinetic studies show that apparent rate constant (kapp) is positively correlated with the concentrations of CH-AuNPs and H2O2, while it is negatively correlated with morin concentration. Furthermore, the reusability tests have been performed and the results demonstrate the long-term stability and reusability of CH-AuNPs without any loss of catalytic activity. Cytotoxicity studies exhibit that CH-AuNPs have low toxicity and they are biocompatible with HeLa and MCF-7 cells.
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Affiliation(s)
- Onur Bulut
- Department of Bioengineering, Faculty of Engineering and Architecture, Konya Food and Agriculture University, 42080 Konya, Turkey; Research and Development Center for Diagnostic Kits (KIT-ARGEM), Konya Food and Agriculture University, 42080 Konya, Turkey
| | - M Deniz Yilmaz
- Department of Bioengineering, Faculty of Engineering and Architecture, Konya Food and Agriculture University, 42080 Konya, Turkey; Research and Development Center for Diagnostic Kits (KIT-ARGEM), Konya Food and Agriculture University, 42080 Konya, Turkey.
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Morawski FDM, Winiarski JP, de Campos CEM, Parize AL, Jost CL. Sensitive simultaneous voltammetric determination of the herbicides diuron and isoproturon at a platinum/chitosan bio-based sensing platform. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 206:111181. [PMID: 32861008 DOI: 10.1016/j.ecoenv.2020.111181] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/11/2020] [Accepted: 08/12/2020] [Indexed: 06/11/2023]
Abstract
Phenylurea herbicides are persistent contaminants, which leads their transport to the surface and ground waters, affecting human and aquatic organisms. Different analytical methods have been reported for the detection of phenylureas; however, several of them are expensive, time-consuming, and require complex pretreatment steps. Here, we show a simple method for the simultaneous electrochemical determination of two phenylurea herbicides by differential pulse adsorptive stripping voltammetry (DPAdSV) using a modified platinum/chitosan electrode. The one-step synthesized platinum/chitosan PtNPs/CS was successfully characterized by TEM, XRPD, and FT-IR, and applied through the sensing platform designated as PtNPs/CS/GCE. This bio-based modified electrode is proposed for the first time for the individual and/or simultaneous electrochemical detection of the phenylurea herbicides diuron and isoproturon compounds extensively used worldwide that present a very similar chemical structure. Electrochemical and interfacial characteristics of the modified electrode were evaluated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It was found that the oxidation mechanism of diuron and isoproturon occurs in two different pathways, with a peak-to-peak definition of ca. 0.15 V. Under differential pulse adsorptive stripping voltammetry (DPAdSV) optimized conditions, the limit of detection (LOD) was estimated as 7 μg L-1 for isoproturon and 20 μg L-1 for diuron (Ed = +0.8 V; td = 100 s). The proposed method was successfully applied to the determination of both analytes in river water samples, at three different levels, with a recovery range of 90-110%. The employment of the bio-based sensing platform PtNPs/CS/GCE allows a novel and easy analytical method to the multi-component phenylurea herbicides detection.
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Affiliation(s)
- Franciele de Matos Morawski
- ampere - Laboratório de Plataformas Eletroquímicas - Universidade Federal de Santa Catarina, Departamento de Química, CEP 88040-900, Florianópolis, SC, Brazil
| | - João Paulo Winiarski
- ampere - Laboratório de Plataformas Eletroquímicas - Universidade Federal de Santa Catarina, Departamento de Química, CEP 88040-900, Florianópolis, SC, Brazil
| | | | - Alexandre Luis Parize
- ampere - Laboratório de Plataformas Eletroquímicas - Universidade Federal de Santa Catarina, Departamento de Química, CEP 88040-900, Florianópolis, SC, Brazil
| | - Cristiane Luisa Jost
- ampere - Laboratório de Plataformas Eletroquímicas - Universidade Federal de Santa Catarina, Departamento de Química, CEP 88040-900, Florianópolis, SC, Brazil.
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Morawski FDM, Xavier BB, Virgili AH, Caetano KDS, de Menezes EW, Benvenutti EV, Costa TMH, Arenas LT. A novel electrochemical platform based on mesoporous silica/titania and gold nanoparticles for simultaneous determination of norepinephrine and dopamine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 120:111646. [PMID: 33545818 DOI: 10.1016/j.msec.2020.111646] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 09/11/2020] [Accepted: 10/14/2020] [Indexed: 12/11/2022]
Abstract
An amorphous and mesoporous silica/titania (SiTi) material was synthesized by sol-gel method and its surface was modified with gold nanoparticles (AuNP) previously stabilized in a chitosan solution. The presence of small AuNP, with diameter lower than 10 nm was confirmed by transmission electron microscopy (TEM) and UV-Vis spectroscopy. Carbon paste electrodes were prepared to test the electrochemical properties by using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) in [Fe(CN)6]3-/4- solution probe whereby the material silica-titania/gold nanoparticles (SiTi/AuNP) showed a huge improvement in the redox peak current and low charge transfer resistance. This electrode presented a good response for both norepinephrine and dopamine by means of square wave voltammetry (SWV) measurements; great sensitivity for both analytes, in an extensive linear range, was obtained. The limits of detection were 0.35 μmol L-1 and 0.57 μmol L-1 for norepinephrine and dopamine, respectively. Additionally, this electrode showed high selectivity for both analytes and it was applied in the simultaneous determination of norepinephrine and dopamine. The sensor was also tested in simulated biological fluids presenting a good recovery. The SWV electrochemical response of norepinephrine was also investigated in the presence of possible interferers such as uric acid, ascorbic acid and glucose and there was no significant interference. The prepared electrode also exhibits good reproducibility for norepinephrine detection, with relative standard deviation of 5.19%.
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Affiliation(s)
- Franciele de Matos Morawski
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Brenda Borges Xavier
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Anike Hübner Virgili
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Karine Dos Santos Caetano
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Eliana Weber de Menezes
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Edilson Valmir Benvenutti
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Tania Maria Haas Costa
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil
| | - Leliz Ticona Arenas
- Laboratory of Solids and Surfaces (LSS), Institute of Chemistry, UFRGS, CP 15003, CEP 91501-970 Porto Alegre, RS, Brazil.
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da Silva AB, Rufato KB, de Oliveira AC, Souza PR, da Silva EP, Muniz EC, Vilsinski BH, Martins AF. Composite materials based on chitosan/gold nanoparticles: From synthesis to biomedical applications. Int J Biol Macromol 2020; 161:977-998. [DOI: 10.1016/j.ijbiomac.2020.06.113] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 05/29/2020] [Accepted: 06/11/2020] [Indexed: 02/07/2023]
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Wang H, Li S, Li J, Zhong L, Cheng H, Ma Q. Immobilized polyphenol oxidase: Preparation, optimization and oxidation of phenolic compounds. Int J Biol Macromol 2020; 160:233-244. [DOI: 10.1016/j.ijbiomac.2020.05.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 05/12/2020] [Accepted: 05/12/2020] [Indexed: 02/08/2023]
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Succinyl chitosan gold nanocomposite: Preparation, characterization, in vitro and in vivo anticandidal activity. Int J Biol Macromol 2020; 165:63-70. [PMID: 32971172 DOI: 10.1016/j.ijbiomac.2020.09.126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/01/2020] [Accepted: 09/17/2020] [Indexed: 12/16/2022]
Abstract
Herein, we have successfully synthesized a novel N-Succinyl chitosan/gold nanocomposite (N-SuC/Au NC) using N-SuC and gold(III) chloride, and investigated the biocompatibility and antifungal activity. The synthesized N-SuC/Au NC was characterized by UV-visible spectroscopy, X-ray diffraction, field emission scanning electron microscope, and inductively coupled plasma atomic emission spectroscopy. The N-SuC/Au NC exhibited a strong inhibition effect towards pathogenic Candida albicans. Morphological analysis revealed the destruction of C. albicans cell membrane due to N-SuC/Au NC treatment. The in vitro and in vivo toxicity of N-SuC/Au NC was analyzed with HEK293T mammalian cells and zebrafish larvae, respectively. The synthesized N-SuC/Au NC demonstrated no cytotoxicity towards HEK293T cells up to 1200 μg/mL concentration. The survival rate of the zebrafish larvae at 120 hpf, was found as 100% up to 1200 μg/mL of N-SuC/Au NC exposure. The in vivo studies further confirmed the inhibitory effects of N-SuC/Au NC on the formation of C. albicans hyphae in infected zebrafish muscle tissue.
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Piroonpan T, Katemake P, Pasanphan W. Comparative study of different chitosan solutions to assist the green synthesis of gold nanoparticles under irradiation. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.03.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Bonardd S, Morales N, Gence L, Saldías C, Angel FA, Kortaberria G, Leiva A. Doped Poly(3-hexylthiophene) Coatings onto Chitosan: A Novel Approach for Developing a Bio-Based Flexible Electronic. ACS APPLIED MATERIALS & INTERFACES 2020; 12:13275-13286. [PMID: 32067453 DOI: 10.1021/acsami.9b21289] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Conductive and flexible bio-based materials consisting of chitosan films coated with conductive poly(3-hexylthiophene) (P3HT) were prepared. Thermal, optical, mechanical, morphological, wettability, and conductive properties were analyzed. In a very simple and effective method of chitosan film modification, a controlled volume of a P3HT solution was deposited onto a previously formed chitosan film, assisted by the spin coating method. Later, P3HT-coated chitosan films were doped by simple contact with an aqueous solution of HAuCl4. The use of HAuCl4 becomes attractive because the reports on the doping process in this type of material using this reagent are still scarce and recent to date. In addition, since this acid is a well-known metal nanoparticle precursor, its use opens new future perspectives for these materials into new applications. The effect of P3HT concentration and doping times on film properties was studied. Attenuated total reflectance spectroscopy and UV-Vis spectroscopy allowed us to demonstrate that the presence of the P3HT coating and its doping induce significant changes in the vibrational modes and optoelectronic properties of samples. Additionally, the images obtained by scanning electron microscopy showed a well-distributed and homogeneous coating on the surface of chitosan films. Measured conductivity values of doped film samples fall in the range from 821.3 to 2017.4 S/m, representing, to the best of our knowledge, the highest values reported in the literature for chitosan/chitin-based materials. Indeed, these values are around or even higher than those obtained for some materials purely consisting of conductive polymers.
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Affiliation(s)
- Sebastian Bonardd
- Facultad de Ciencias, Centro de Nanotecnología Aplicada, Universidad Mayor, Camino la Pirámide 5750, Santiago 8580745, Chile
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago 7820436, Chile
| | - Natalia Morales
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago 7820436, Chile
| | - Loïk Gence
- Instituto de Física, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Santiago 7820436, Chile
| | - César Saldías
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago 7820436, Chile
| | - Felipe A Angel
- Departamento de Química Inorgánica, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Centro de Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Galder Kortaberria
- Universidad del País Vasco/EuskalHerriko Unibertsitatea, 'Materials + Technologies' Group, Departamento Ingeniería Química y Medio Ambiente, Escuela de Ingeniería de Gipuzkoa, Pza Europa 1, 20018 Donostia-San Sebastián, Spain
| | - Angel Leiva
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 302, Correo 22, Santiago 7820436, Chile
- Centro de Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
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15
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Pavoni JMF, dos Santos NZ, May IC, Pollo LD, Tessaro IC. Impact of acid type and glutaraldehyde crosslinking in the physicochemical and mechanical properties and biodegradability of chitosan films. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03140-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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de Almeida DA, Sabino RM, Souza PR, Bonafé EG, Venter SA, Popat KC, Martins AF, Monteiro JP. Pectin-capped gold nanoparticles synthesis in-situ for producing durable, cytocompatible, and superabsorbent hydrogel composites with chitosan. Int J Biol Macromol 2020; 147:138-149. [DOI: 10.1016/j.ijbiomac.2020.01.058] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/22/2019] [Accepted: 01/06/2020] [Indexed: 12/19/2022]
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17
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A helpful method for controlled synthesis of monodisperse gold nanoparticles through response surface modeling. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.04.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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18
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Impact of acid type for chitosan dissolution on the characteristics and biodegradability of cornstarch/chitosan based films. Int J Biol Macromol 2019; 138:693-703. [DOI: 10.1016/j.ijbiomac.2019.07.089] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 07/11/2019] [Accepted: 07/12/2019] [Indexed: 11/19/2022]
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19
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Caldera Villalobos M, Martins Alho M, García Serrano J, Álvarez Romero GA, Herrera González AM. Colloidal synthesis of Au nanoparticles using polyelectrolytes with 1,3,4‐thiadiazole as reducing agents. J Appl Polym Sci 2019. [DOI: 10.1002/app.47790] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Martín Caldera Villalobos
- Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Laboratorio de Polímeros Carretera Pachuca‐Tulancingo km. 4.5, Colonia Carboneras, C.P. 42184, Mineral de la Reforma Hidalgo Mexico
| | - Miriam Martins Alho
- Facultad de Ingeniería, Departamento de QuímicaUniversidad de Buenos Aires, Cátedra de Química Orgánica Avenue Paseo Colón, 850, CABA Argentina
| | - Jesús García Serrano
- Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Laboratorio de Polímeros Carretera Pachuca‐Tulancingo km. 4.5, Colonia Carboneras, C.P. 42184, Mineral de la Reforma Hidalgo Mexico
| | - Giaan Arturo Álvarez Romero
- Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e IngenieríaÁrea Académica de Química Carretera Pachuca‐Tulancingo, Colonia Carboneras, C.P. 42184, Mineral de la Reforma Hidalgo Mexico
| | - Ana M. Herrera González
- Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería, Laboratorio de Polímeros Carretera Pachuca‐Tulancingo km. 4.5, Colonia Carboneras, C.P. 42184, Mineral de la Reforma Hidalgo Mexico
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20
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Pu S, Li J, Sun L, Zhong L, Ma Q. An in vitro comparison of the antioxidant activities of chitosan and green synthesized gold nanoparticles. Carbohydr Polym 2019; 211:161-172. [DOI: 10.1016/j.carbpol.2019.02.007] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 12/06/2018] [Accepted: 02/01/2019] [Indexed: 12/24/2022]
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21
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Collado-González M, González Espinosa Y, Goycoolea FM. Interaction Between Chitosan and Mucin: Fundamentals and Applications. Biomimetics (Basel) 2019; 4:E32. [PMID: 31105217 PMCID: PMC6631199 DOI: 10.3390/biomimetics4020032] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 04/05/2019] [Accepted: 04/15/2019] [Indexed: 12/14/2022] Open
Abstract
The term chitosan (CS) refers to a family of aminopolysaccharides derived from chitin. Among other properties, CS is nontoxic, mucoadhesive and can be used for load and transport drugs. Given these and other physicochemical and biological properties, CS is an optimal biopolymer for the development of transmucosal drug delivery systems, as well as for the treatment of pathologies related to mucosal dysfunctions. Mucins are glycoprotein macromolecules that are the major components of mucus overlaying epithelia. CS interacts with mucin and adsorbs on and changes the rheology of mucus. However, CS and mucins denote families of polymers/macromolecules with highly variable chemical structure, properties, and behavior. To date, their interactions at the molecular level have not been completely unraveled. Also, the properties of complexes composed of CS and mucin vary as a function of the sources and preparation of the polymers. As a consequence, the mucoadhesion and drug delivery properties of such complexes vary as well. The breadth of this review is on the molecular interactions between CS and mucin. In particular, in vitro and ex vivo characterization methods to investigate both the interactions at play during the formation of CS-mucin complexes, and the advances on the use of CS for transmucosal drug delivery are addressed.
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22
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A novel environmentally friendly method in solid phase for in situ synthesis of chitosan-gold bionanocomposites with catalytic applications. Carbohydr Polym 2019; 207:533-541. [DOI: 10.1016/j.carbpol.2018.12.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 10/04/2018] [Accepted: 12/06/2018] [Indexed: 02/02/2023]
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23
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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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24
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Sun L, Pu S, Li J, Cai J, Zhou B, Ren G, Ma Q, Zhong L. Size controllable one step synthesis of gold nanoparticles using carboxymethyl chitosan. Int J Biol Macromol 2019; 122:770-783. [DOI: 10.1016/j.ijbiomac.2018.11.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/31/2018] [Accepted: 11/02/2018] [Indexed: 01/04/2023]
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25
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Meng Y, Cai L, Xu X, Zhang L. Construction of size-controllable gold nanoparticles immobilized on polysaccharide nanotubes by in situ one-pot synthesis. Int J Biol Macromol 2018; 113:240-247. [DOI: 10.1016/j.ijbiomac.2018.02.122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 02/01/2018] [Indexed: 11/28/2022]
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26
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Argüelles-Monal WM, Lizardi-Mendoza J, Fernández-Quiroz D, Recillas-Mota MT, Montiel-Herrera M. Chitosan Derivatives: Introducing New Functionalities with a Controlled Molecular Architecture for Innovative Materials. Polymers (Basel) 2018; 10:E342. [PMID: 30966377 PMCID: PMC6414943 DOI: 10.3390/polym10030342] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 11/20/2022] Open
Abstract
The functionalization of polymeric substances is of great interest for the development of innovative materials for advanced applications. For many decades, the functionalization of chitosan has been a convenient way to improve its properties with the aim of preparing new materials with specialized characteristics. In the present review, we summarize the latest methods for the modification and derivatization of chitin and chitosan under experimental conditions, which allow a control over the macromolecular architecture. This is because an understanding of the interdependence between chemical structure and properties is an important condition for proposing innovative materials. New advances in methods and strategies of functionalization such as the click chemistry approach, grafting onto copolymerization, coupling with cyclodextrins, and reactions in ionic liquids are discussed.
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Affiliation(s)
| | - Jaime Lizardi-Mendoza
- Centro de Investigación en Alimentación y Desarrollo, Hermosillo 83304, Sonora, Mexico.
| | - Daniel Fernández-Quiroz
- Departamento de Investigación en Física, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico.
| | | | - Marcelino Montiel-Herrera
- Departamento de Medicina y Ciencias de la Salud, Universidad de Sonora, Hermosillo 83000, Sonora, Mexico.
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27
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In situ preparation of film and hydrogel bio-nanocomposites of chitosan/fluorescein-copper with catalytic activity. Carbohydr Polym 2018; 180:200-208. [DOI: 10.1016/j.carbpol.2017.10.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 08/03/2017] [Accepted: 10/03/2017] [Indexed: 02/08/2023]
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28
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Sun L, Li J, Cai J, Zhong L, Ren G, Ma Q. One pot synthesis of gold nanoparticles using chitosan with varying degree of deacetylation and molecular weight. Carbohydr Polym 2017; 178:105-114. [DOI: 10.1016/j.carbpol.2017.09.032] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 09/05/2017] [Accepted: 09/08/2017] [Indexed: 02/02/2023]
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29
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Ramirez O, Bonardd S, Saldías C, Radic D, Leiva Á. Biobased Chitosan Nanocomposite Films Containing Gold Nanoparticles: Obtainment, Characterization, and Catalytic Activity Assessment. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16561-16570. [PMID: 28459535 DOI: 10.1021/acsami.7b04422] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A "green" two-step methodology to prepare biobased gold-chitosan nanocomposite films using chitosan and AuCl4- as a stabilizer and precursor, respectively, is reported. The biobased nanocomposites were prepared in situ by a wet chemical reduction method. Effects of hydrazine and l-ascorbic acid as different strength reducing agents on the characteristics of gold nanoparticles were observed. In addition, the performance of these nanocomposite films as catalytic materials was assessed. The relevance of this work underlies that the catalytic activity, conversion degree and order of the reaction of the 4-nitrophenol-sodium borohydride (4NP-NaBH4) reduction system depend on the size distribution, content and mainly to the location of gold nanoparticles in the nanocomposite films. Finally, the potential recyclability of these nanocomposite films as catalytic materials was studied.
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Affiliation(s)
- Oscar Ramirez
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
| | - Sebastián Bonardd
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
| | - Cesar Saldías
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
| | - Deodato Radic
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
| | - Ángel Leiva
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, Macul, Santiago 7820436, Chile
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30
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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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31
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Thermal and morphological behavior of chitosan/PEO blends containing gold nanoparticles. Experimental and theoretical studies. Carbohydr Polym 2016; 144:315-29. [DOI: 10.1016/j.carbpol.2016.02.071] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/12/2016] [Accepted: 02/23/2016] [Indexed: 11/21/2022]
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32
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Chibac AL, Buruiana T, Melinte V, Mangalagiu I, Buruiana EC. Tuning the size and the photocatalytic performance of gold nanoparticles in situ generated in photopolymerizable glycomonomers. RSC Adv 2015. [DOI: 10.1039/c5ra14695j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Polymer nanocomposites containing Au NPs in situ photogenerated during the UV-curing process were prepared starting from methacrylated glycomonomers with α-d-glucofuranose or d-mannitol structural units, other mono(di)methacrylates and AuCl3.
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Affiliation(s)
- Andreea L. Chibac
- Department of Organic Chemistry
- “Al. I. Cuza” University of Iasi
- 700506 Iasi
- Romania
- Petru Poni Institute of Macromolecular Chemistry
| | - Tinca Buruiana
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - Violeta Melinte
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
| | - Ionel Mangalagiu
- Department of Organic Chemistry
- “Al. I. Cuza” University of Iasi
- 700506 Iasi
- Romania
| | - Emil C. Buruiana
- Petru Poni Institute of Macromolecular Chemistry
- 700487 Iasi
- Romania
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