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Candido JDC, Conceição NA, Moreira APD, Calçada LA, Araújo LS, Santos RA, Middea A, Luchese R, Prudencio ER, Castro RN, McGuinness GB, Oliveira RN. Alginate hydrogels incorporating neomycin or propolis as potential dressings for diabetic ulcers: Structure, swelling, and antimicrobial barrier properties. POLYM ADVAN TECHNOL 2019. [DOI: 10.1002/pat.4679] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
| | - Natália Alves Conceição
- Department of Chemical Engineering/DEQFederal Rural University of Rio de Janeiro Seropédica Brazil
| | - Ana Paula Duarte Moreira
- Program of Materials and Metallurgy Engineering/COPPEFederal University of Rio de Janeiro Rio de Janeiro Brazil
| | - Luís Américo Calçada
- Postgraduate Program of Chemical Engineering/DEQFederal Rural University of Rio de Janeiro Seropédica Brazil
| | - Leonardo Sales Araújo
- Program of Materials and Metallurgy Engineering/COPPEFederal University of Rio de Janeiro Rio de Janeiro Brazil
| | - Robson Araújo Santos
- Program of Materials and Metallurgy Engineering/COPPEFederal University of Rio de Janeiro Rio de Janeiro Brazil
| | | | - Rosa Luchese
- Department of Food Engineering/DTAFederal Rural University of Rio de Janeiro Seropédica Brazil
| | | | - Rosane Nora Castro
- Department of Chemistry/DEQUIMFederal Rural University of Rio de Janeiro Seropédica Brazil
| | - Garrett Brian McGuinness
- Centre for Medical Engineering ResearchSchool of Mechanical and Manufacturing Engineering, DCU Dublin Ireland
| | - Renata Nunes Oliveira
- Postgraduate Program of Chemical Engineering/DEQFederal Rural University of Rio de Janeiro Seropédica Brazil
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52
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Sun R, Zhang M, Xia Q. Improved stability of (W
1
/O/W
2
) double emulsions based on dual gelation: Oleogels and hydrogels. J FOOD PROCESS ENG 2019. [DOI: 10.1111/jfpe.13186] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Rui Sun
- School of Biological Science and Medical Engineering, State Key Laboratory of BioelectronicsSoutheast University Nanjing China
- National Demonstration Center for Experimental Biomedical Engineering EducationSoutheast University Nanjing China
- Collaborative Innovation Center of Suzhou Nano Science and Technology Suzhou China
| | - Ming Zhang
- School of Biological Science and Medical Engineering, State Key Laboratory of BioelectronicsSoutheast University Nanjing China
- National Demonstration Center for Experimental Biomedical Engineering EducationSoutheast University Nanjing China
- Collaborative Innovation Center of Suzhou Nano Science and Technology Suzhou China
| | - Qiang Xia
- School of Biological Science and Medical Engineering, State Key Laboratory of BioelectronicsSoutheast University Nanjing China
- National Demonstration Center for Experimental Biomedical Engineering EducationSoutheast University Nanjing China
- Collaborative Innovation Center of Suzhou Nano Science and Technology Suzhou China
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53
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Release mechanism of lipid nanoparticles immobilized within alginate beads influenced by nanoparticle size and alginate concentration. Colloid Polym Sci 2019. [DOI: 10.1007/s00396-019-04538-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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54
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Li X, Qin L, Zhang Y, Xu Z, Tian L, Guo X, Zhang G. Self-Assembly of Mn(II)-Amidoximated PAN Polymeric Beads Complex as Reusable Catalysts for Efficient and Stable Heterogeneous Electro-Fenton Oxidation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:3925-3936. [PMID: 30620170 DOI: 10.1021/acsami.8b18704] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A facile postsynthetic amidoxime modification method was reported on the preparation of transition-metal ions (Mn, Fe, and Co)-polyacrylonitrile (PAN) polymeric beads complex as reusable catalysts for efficient and stable heterogeneous electro-Fenton oxidation. Through one-step phase inversion, low-cost and chemically resistant polymeric PAN beads were fabricated on a large scale with controllable sizes and abundant porous structure. The postfunctionalization strategy led more active sites to be uniformly distributed into modified PAN beads owing to the favorable channel confined effect and chelate coordination. Compared with pure PAN beads, the modified composite catalysts exhibited remarkably higher activity and stability in electro-Fenton oxidation over wide pH range of 3-10 without any addition of H2O2. By analysis, the grafted amidoxime group was extremely beneficial for improving metal loading and binding force between active sites and organic supports, which accelerated the active sites autocatalytic cycle to promote H2O2 activation by means of excited electron transfer from composites' functional groups. The catalytic activity of Mn-amidoximated PAN evaluated by the turnover frequency was 15 times more than that of traditional iron oxide and very competitive to the reported metal-organic framework-based composites. Moreover, a strong metal and polymeric support interaction significantly enhanced the stabilization of active sites dispersed in porous matrix and solved the ever-present problem of metallic ions leaching to the greatest extent. The scalable introduction of functionalities into sophisticated structures after host framework synthesis will bring valuable insights to develop highly efficient and stable heterogeneous catalysts for green electrochemical oxidation in practical application.
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Affiliation(s)
- Xiong Li
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Lei Qin
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Yufan Zhang
- Department of Mechanical Engineering, College of Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Zehai Xu
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Lin Tian
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology , Zhejiang University of Technology , Hangzhou 310014 , China
| | - Xinwen Guo
- State Key Laboratory of Fine Chemicals, Department of Catalysis Chemistry and Engineering , Dalian University of Technology , Dalian 116012 , China
| | - Guoliang Zhang
- Institute of Oceanic and Environmental Chemical Engineering, State Key Lab Breeding Base of Green Chemical Synthesis Technology , Zhejiang University of Technology , Hangzhou 310014 , China
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55
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Application of Millifluidics to Encapsulate and Support Viable Human Mesenchymal Stem Cells in a Polysaccharide Hydrogel. Int J Mol Sci 2018; 19:ijms19071952. [PMID: 29970871 PMCID: PMC6073862 DOI: 10.3390/ijms19071952] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 06/28/2018] [Accepted: 06/29/2018] [Indexed: 01/10/2023] Open
Abstract
Human adipose-derived stromal cells (hASCs) are widely known for their immunomodulatory and anti-inflammatory properties. This study proposes a method to protect cells during and after their injection by encapsulation in a hydrogel using a droplet millifluidics technique. A biocompatible, self-hardening biomaterial composed of silanized-hydroxypropylmethylcellulose (Si-HPMC) hydrogel was used and dispersed in an oil continuous phase. Spherical particles with a mean diameter of 200 μm could be obtained in a reproducible manner. The viability of the encapsulated hASCs in the Si-HPMC particles was 70% after 14 days in vitro, confirming that the Si-HPMC particles supported the diffusion of nutrients, vitamins, and glucose essential for survival of the encapsulated hASCs. The combination of droplet millifluidics and biomaterials is therefore a very promising method for the development of new cellular microenvironments, with the potential for applications in biomedical engineering.
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56
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Polysaccharide Hydrogels Support the Long-Term Viability of Encapsulated Human Mesenchymal Stem Cells and Their Ability to Secrete Immunomodulatory Factors. Stem Cells Int 2017; 2017:9303598. [PMID: 29158741 PMCID: PMC5660815 DOI: 10.1155/2017/9303598] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/03/2017] [Accepted: 08/08/2017] [Indexed: 01/06/2023] Open
Abstract
While therapeutically interesting, the injection of MSCs suffers major limitations including cell death upon injection and a massive leakage outside the injection site. We proposed to entrap MSCs within spherical particles derived from alginate, as a control, or from silanized hydroxypropyl methylcellulose (Si-HPMC). We developed water in an oil dispersion method to produce small Si-HPMC particles with an average size of about 68 μm. We evidenced a faster diffusion of fluorescein isothiocyanate-dextran in Si-HPMC particles than in alginate ones. Human adipose-derived MSCs (hASC) were encapsulated either in alginate or in Si-HPMC, and the cellularized particles were cultured for up to 1 month. Both alginate and Si-HPMC particles supported cell survival, and the average number of encapsulated hASC per alginate and Si-HPMC particle (7102 and 5100, resp.) did not significantly change. The stimulation of encapsulated hASC with proinflammatory cytokines resulted in the production of IDO, PGE2, and HGF whose concentration was always higher when cells were encapsulated in Si-HPMC particles than in alginate ones. We have demonstrated that Si-HPMC and alginate particles support hASC viability and the maintenance of their ability to secrete therapeutic factors.
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57
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Lu Y, Zhu J, Shi J, Liu Y, Shao D, Jiang C. Immobilized enzymes from Geotrichum spp. improve wine quality. Appl Microbiol Biotechnol 2017; 101:6637-6649. [DOI: 10.1007/s00253-017-8424-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 06/19/2017] [Accepted: 07/02/2017] [Indexed: 12/11/2022]
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58
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Xiao Z, Zhang Y, Zhu G, Niu Y, Xu Z, Zhu J. Preparation of micro-encapsulated strawberry fragrance and its application in the aromatic wallpaper. POLISH JOURNAL OF CHEMICAL TECHNOLOGY 2017. [DOI: 10.1515/pjct-2017-0013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Micro-encapsulated strawberry fragrance was successfully prepared with wall materials including maltodextrin, sodium octenylsuccinate and gum Arabic. The micro-capsule was added to wallpaper and aromatic wallpaper with strawberry characteristics was obtained. The particle distribution, surface morphology, chemical structure, thermal property and controlled release performance of micro-encapsulated fragrance and aromatic wallpaper were investigated using laser particle size analyzer, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-TR), thermal gravity analysis (TGA) and chromatography-mass spectrometer (GC-MS). The results showed that the average diameter of micro-capsule was 2 μm and the particles mainly distributed in the tissues of wallpaper. The result of TGA showed that the micro-capsule had a good stability. Meanwhile, the aromatic wallpaper had strawberry aroma more than 3 months and took on excellent controlled release performance.
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Affiliation(s)
- Zuobing Xiao
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
| | - Yu Zhang
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
| | - Guangyong Zhu
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
| | - Yunwei Niu
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
| | - Ziqi Xu
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
| | - Jiancai Zhu
- Shanghai Institute of Technology, No. 100 Haiquan Road, 201418 , Shanghai , China
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Pavelková M, Kubová K, Vysloužil J, Kejdušová M, Vetchý D, Celer V, Molinková D, Lobová D, Pechová A, Vysloužil J, Kulich P. Biological Effects of Drug-Free Alginate Beads Cross-Linked by Copper Ions Prepared Using External Ionotropic Gelation. AAPS PharmSciTech 2017; 18:1343-1354. [PMID: 27502404 DOI: 10.1208/s12249-016-0601-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 07/22/2016] [Indexed: 11/30/2022] Open
Abstract
External ionotropic gelation offers a unique possibility to entrap multivalent ions in a polymer structure. The aim of this experimental study was to prepare new drug-free sodium alginate (ALG) particles cross-linked by Cu2+ ions and to investigate their technological parameters (particle size, sphericity, surface topology, swelling capacity, copper content, release of Cu2+ ions, mucoadhesivity) and biological activity (cytotoxicity and efficiency against the most common vaginal pathogens-Herpes simplex, Escherichia coli, Candida albicans) with respect to potential vaginal administration. Beads prepared from NaALG dispersions (3 or 4%) were cross-linked by Cu2+ ions (0.5 or 1.0 M CuCl2) using external ionotropic gelation. Prepared mucoadhesive beads with particle size over 1000 μm exhibited sufficient sphericity (all ˃0.89) and copper content (214.8-249.07 g/kg), which increased with concentration of polymer and hardening solution. Dissolution behaviour was characterized by extended burst effect, followed by 2 h of copper release. The efficiency of all samples against the most common vaginal pathogens was observed at cytotoxic Cu2+ concentrations. Anti-HSV activity was demonstrated at a Cu2+ concentration of 546 mg/L. Antibacterial activity of beads (expressed as minimum inhibition concentration, MIC) was influenced mainly by the rate of Cu2+ release which was controlled by the extent of swelling capacity. Lower MIC values were found for E. coli in comparison with C. albicans. Sample ALG-3_1.0 exhibited the fastest copper release and was proved to be the most effective against both bacteria. This could be a result of its lower polymer concentration in combination with smaller particle size and thus larger surface area.
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60
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Lee BB, Bhandari BR, Howes T. Air Extrusion System for Ionotropic Alginate Microgel Particle Formation: A Review. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201600088] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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61
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Physicochemical Characterization of Alginate Beads Containing Sugars and Biopolymers. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/9184039] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Alginate hydrogels are suitable for the encapsulation of a great variety of biomolecules. Several alternatives to the conventional alginate formulation are being studied for a broad range of biotechnological applications; among them the addition of sugars and biopolymers arises as a good and economic strategy. Sugars (trehalose and β-cyclodextrin), a cationic biopolymer (chitosan), an anionic biopolymer (pectin), and neutral gums (Arabic, guar, espina corona, and vinal gums) provided different characteristics to the beads. Here we discuss the influence of beads composition on several physicochemical properties, such as size and shape, analyzed through digital image analysis besides both water content and activity. The results showed that the addition of a second biopolymer, β-CD, or trehalose provoked more compact beads, but the fact that they were compact not necessarily implies a concomitant increase in their circularity. Espina corona beads showed the highest circularity value, being useful for applications which require a controlled and high circularity, assuring quality control. Beads with trehalose showed lower water content than the rest of the system, followed by those containing galactomannans (espina corona, vinal, and guar gums), revealing polymer structure effects. A complete characterization of the beads was performed by FT-IR, assigning the characteristics bands to each individual component.
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Lim GP, Lee BB, Ahmad MS, Singh H, Ravindra P. Influence of process variables and formulation composition on sphericity and diameter of Ca-alginate-chitosan liquid core capsule prepared by extrusion dripping method. PARTICULATE SCIENCE AND TECHNOLOGY 2015. [DOI: 10.1080/02726351.2015.1107160] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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63
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Sher P, Oliveira SM, Borges J, Mano JF. Assembly of cell-laden hydrogel fiber into non-liquefied and liquefied 3D spiral constructs by perfusion-based layer-by-layer technique. Biofabrication 2015; 7:011001. [DOI: 10.1088/1758-5090/7/1/011001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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