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Elvitigala KCML, Mubarok W, Sakai S. Tuning the crosslinking and degradation of hyaluronic acid/gelatin hydrogels using hydrogen peroxide for muscle cell sheet fabrication. SOFT MATTER 2023; 19:5880-5887. [PMID: 37439099 DOI: 10.1039/d3sm00560g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/14/2023]
Abstract
Cell sheets have immense potential for medical and pharmaceutical applications including tissue regeneration, drug testing, and disease modelling. In this study, composite hydrogels were prepared from a mixture of phenolated hyaluronic acid (HA-Ph) and gelatin (Gelatin-Ph), with a controlled degree of polymer crosslinking and degradation, to fabricate muscle cell sheets from myoblasts. These hydrogels were obtained via hydrogen peroxide (H2O2)-mediated crosslinking catalysed by horseradish peroxidase (HRP) and peroxide-mediated cleavage of the polymer chains. The degrees of crosslinking and degradation were modulated by altering the exposure time to air containing H2O2. The results showed that exposing a solution of 2% w/v HA-Ph, 0.75% w/v Gelatin-Ph, and 1 unit mL-1 HRP to air with 16 ppm H2O2 for 60 min yielded a stiffer hydrogel (7.16 kPa Young's modulus) than exposure times of 15 min (0.46 kPa) and 120 min (3.98 kPa). Moreover, mouse myoblast C2C12 cells cultured on a stiff hydrogel and induced to undergo myogenic differentiation formed longer and higher-density myotubes than those on softer hydrogels. The cell sheets were readily detached within 5 min by immersing the HA-Ph/Gelatin-Ph hydrogels covered with a monolayer of cells in a medium containing hyaluronidase. Our findings demonstrate that composite hydrogels with properties tuned by controlling the exposure time to H2O2, show great promise as platforms for muscle cell sheet fabrication.
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Affiliation(s)
| | - Wildan Mubarok
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
| | - Shinji Sakai
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
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Zhou J, Li R. Proton-Rich POM-Type K 12Mo 8O 20(HPO 4) 8(PO 4)Cl with Ion-Exchange Capabilities. Inorg Chem 2022; 61:5262-5269. [PMID: 35320675 DOI: 10.1021/acs.inorgchem.1c03822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A proton-rich POM-type molybdenum phosphate K12Mo8O20(HPO4)8(PO4)Cl was successfully obtained. It crystallizes in a noncentrosymmetric tetragonal space group of P-4 (No. 81) with the unit cell parameters of a = 9.6580(4) Å, c = 14.2607(10) Å, and Z = 1. The occurrence and positions of the light element H in the structure are inferred from single-crystal X-ray diffraction and confirmed by DFT calculations. The hydrogen atoms are found to form hydroxyl bonds with O atoms from P(2)O4 and P(3)O4 constituting the [Mo4P4O26H4]4- layers but are only weakly bound to the isolated P(3)O4 group through hydrogen bonds. The title compound presents a POM-type framework of corrugated [Mo4P4O26H4]4- layers with four K+ ions and mixed ions (K4Cl3+ and isolated PO43-) orderly imbedding in the interlayer spaces with distances of 5.0396 (1) and 5.5966 (3) Å, respectively. The proton-rich nature and the structure feature were further verified by a series of experiments including 1H, 7Li, and 31P MAS NMR spectra, IR spectroscopy, and thermal analysis. Moreover, the weak bonding and large interlayer spaces make K+ and H+ ions susceptible to exchange with ions of Cs+, Ba2+, Zn2+, Pb2+, Cu2+, and Ni2+ commonly presented in chemical pollutants or nuclear wastes. In addition, the title compound shows a small second-harmonic generation signal, consistent with its noncentrosymmetric structure.
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Affiliation(s)
- Jingfang Zhou
- Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Rukang Li
- Beijing Center for Crystal Research and Development, Key Laboratory of Functional Crystals and Laser Technology, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,School of Chemical Science, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
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Jafari H, Delporte C, Bernaerts KV, De Leener G, Luhmer M, Nie L, Shavandi A. Development of marine oligosaccharides for potential wound healing biomaterials engineering. CHEMICAL ENGINEERING JOURNAL ADVANCES 2021. [DOI: 10.1016/j.ceja.2021.100113] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
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Bao X, Qin Z, Zhou T, Deng J. In-situ generation of gold nanoparticles on MnO 2 nanosheets for the enhanced oxidative degradation of basic dye (Methylene Blue). J Environ Sci (China) 2018; 65:236-245. [PMID: 29548394 DOI: 10.1016/j.jes.2017.03.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Accepted: 03/03/2017] [Indexed: 06/08/2023]
Abstract
In this work, the gold nanoparticles (Au-NPs) were in-situ generated on the surface of MnO2 nanosheets to form MnO2/Au-NPs nanocomposite in a simple and cost-effective way. Multiple experiments were carried out to optimize the oxidation of basic dye (Methylene Blue (MB)), including the molar ratio of MnO2 to chloroauric acid (HAuCl4), the pH of the solution and the effect of initial material. Under the optimal condition, the highest degradation efficiency for MB achieved to 98.9% within 60 min, which was obviously better than commercial MnO2 powders (4.3%) and MnO2 nanosheets (74.2%). The enhanced oxidative degradation might attribute to the in-situ generation of ultra-small and highly-dispersed Au-NPs which enlarged the synergistic effect and/or interfacial effect between MnO2 nanosheets and Au-NPs and facilitated the uptake of electrons by MnO2 from MB during the oxidation, thus validating the application of MnO2/Au-NPs nanocomposite for direct removal of organic dyes from wastewater in a simple and convenient fashion.
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Affiliation(s)
- Xueqin Bao
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhen Qin
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Tianshu Zhou
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Jingjing Deng
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, China.
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Zhang H, Lu Y, Wang Y, Zhang X, Wang T. d-Glucosamine production from chitosan hydrolyzation over a glucose-derived solid acid catalyst. RSC Adv 2018; 8:5608-5613. [PMID: 35542433 PMCID: PMC9078138 DOI: 10.1039/c7ra12490b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/18/2018] [Indexed: 11/22/2022] Open
Abstract
A glucose-based solid acid catalyst (GSA) was synthesized by hydrothermal carbonization and its physicochemical properties were explored by various characterization techniques including IR, TG and SEM. In addition, its catalytic performance towards d-glucosamine formation from the hydrolysis of chitosan was extensively investigated to determine the effects of reaction parameters, such as reaction temperature, time and mass ratio of catalyst and reactants. The experimental results revealed that the yield of targeted product d-glucosamine could reach as high as 98.1% under optimal conditions (temperature: 110 °C; time: 6 h). After six catalytic cycles, no evident deactivation was observed, suggesting the satisfactory stability of the investigated solid acid catalyst. This might provide insight on the development of suitable catalyst systems for d-glucosamine formation to replace homogeneous catalysts. A method for preparing d-glucosamine in aqueous phase by chitosan degradation by a solid acid, which resulted in high yields.![]()
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Affiliation(s)
- Hongkui Zhang
- Faculty of Light Industry and Chemical Engineering
- Dalian Polytechnic University
- Dalian 116023
- China
| | - Yuting Lu
- Faculty of Light Industry and Chemical Engineering
- Dalian Polytechnic University
- Dalian 116023
- China
| | - Yuanhao Wang
- Faculty of Light Industry and Chemical Engineering
- Dalian Polytechnic University
- Dalian 116023
- China
| | - Xingrong Zhang
- State Key Laboratory of Mineral Processing
- Beijing General Research Institute of Mining and Metallurgy
- Beijing 102600
- China
| | - Tingyu Wang
- College of Chemistry, Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215006
- China
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Sustainable Oxidative Cleavage of Vegetable Oils into Diacids by Organo-Modified Molybdenum Oxide Heterogeneous Catalysts. J AM OIL CHEM SOC 2017. [DOI: 10.1007/s11746-017-3047-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Varshosaz J, Riahi S, Ghassami E, Jahanian-Najafabadi A. Transferrin-targeted poly(butylene adipate)/terephthalate nanoparticles for targeted delivery of 5-fluorouracil in HT29 colorectal cancer cell line. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911517690756] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The purpose of this study was to design 5-fluorouracil-loaded poly(butylene adipate)/terephthalate (Ecoflex®) nanoparticles for targeting colorectal cancer. The nanoparticles were prepared by emulsification–solvent evaporation method and optimized by a full factorial design. The effects of polymer and surfactant concentration, surfactant type, and stirrer rate were studied on the particle size, zeta potential, loading efficiency, and release efficiency of nanoparticles. For production of targeted nanoparticles, chitosan was conjugated to transferrin which was then coated on the surface of Ecoflex nanoparticles via electrostatic interactions. The conjugation of transferrin/chitosan was verified by Fourier transform infrared spectroscopy, ultraviolet spectroscopy, and SDS-PAGE (sodium dodecyl sulfate–polyacrylamide gel electrophoresis) methods and quantified by ultraviolet spectroscopy assay. The cytotoxicity of 5-fluorouracil loaded in targeted and non-targeted nanoparticles was studied on human colon adenocarcinoma cell line (HT29), Michigan Cancer Foundation-7 (MCF-7), and human umbilical vein endothelial cells using MTT (thiazolyl blue tetrazolium bromide) assay. The best results were obtained from nanoparticles prepared by 0.2% of the polymer, 2% of Tween 20, and stirrer speed of 17,500 r/min. The successful conjugation of transferrin/chitosan was confirmed by Fourier transform infrared spectrum and SDS-PAGE results and was about 80%. The targeted nanoparticles showed significantly more cytotoxic effects on HT29 cells compared to free 5-fluorouracil and non-targeted nanoparticles. Blocking transferrin receptors resulted in a significantly higher cell survival for targeted nanoparticles which confirmed receptor-mediated cellular uptake of targeted nanoparticles.
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Affiliation(s)
- Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sara Riahi
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Erfaneh Ghassami
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ali Jahanian-Najafabadi
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
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Bio-scaffolds produced from irradiated squid pen and crab chitosan with hydroxyapatite/β-tricalcium phosphate for bone-tissue engineering. Int J Biol Macromol 2016; 93:1446-1456. [PMID: 27126171 DOI: 10.1016/j.ijbiomac.2016.04.046] [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: 01/23/2016] [Revised: 04/12/2016] [Accepted: 04/15/2016] [Indexed: 11/23/2022]
Abstract
In this study, bio-scaffolds have been developed using irradiated chitosan from different sources - squid pen (RS) and crab shell (RC) - with hydroxyapatite/β-tricalcium phosphate (HA/β-TCP) at a chitosan/HA/β-TCP ratio of 50/30/20. The bio-scaffolds were prepared at two different freezing temperature (-20°C and -80°C) followed by lyophilisation. To enhance the mechanical properties, the bio-scaffolds were cross-linked using sodium tripolyphosphate (TPP) followed by lyophilisation. The composition and morphology of the bio-scaffolds were characterized using XRD, SEM, TEM and μ-CT. The pore size of the porous scaffolds ranged from 90 to 220μm and the scaffolds had 70-80% porosity. The scaffolds had a water uptake ratio of more than 10, and a controlled biodegradation in the range of 30-40%. These results suggest that the physical and biological properties of chitosan-based bio-scaffolds can be a promising biomaterial for bone-tissue regeneration.
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Dong Y, Feng C, Zhang J, Jiang P, Wang G, Wu X, Miao H. A New p-Metal-n Structure AgBr-Ag-BiOBr with Superior Visible-Light-Responsive Catalytic Performance. Chem Asian J 2014; 10:687-93. [DOI: 10.1002/asia.201403217] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Indexed: 11/05/2022]
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