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Lin W, Qi X, Guo W, Liang D, Chen H, Lin B, Deng X. A barrier against reactive oxygen species: chitosan/acellular dermal matrix scaffold enhances stem cell retention and improves cutaneous wound healing. Stem Cell Res Ther 2020; 11:383. [PMID: 32894204 PMCID: PMC7487689 DOI: 10.1186/s13287-020-01901-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 08/13/2020] [Accepted: 08/24/2020] [Indexed: 12/30/2022] Open
Abstract
Background Stem cell therapies have gained great attention for providing novel solutions for treatment of various injuries and diseases due to stem cells’ self-renewal, ability to differentiate into various cell types, and favorite paracrine function. Nevertheless, the low retention of transplanted stem cell still limits their clinical applications such as in wound healing in view of an induced harsh microenvironment rich in reactive oxygen species (ROS) during inflammatory reactions. Methods Herein, a novel chitosan/acellular dermal matrix (CHS/ADM) stem cell delivery system is developed, which is of great ROS scavenging activity and significantly attenuates inflammatory response. Result Under ROS microenvironment, this stem cell delivery system acts as a barrier, effectively scavenging an amount of ROS and protecting mesenchymal stem cells (MSCs) from the oxidative stress. It notably regulates intracellular ROS level in MSCs and reduces ROS-induced cellular death. Most importantly, such MSCs delivery system significantly enhances in vivo transplanted stem cell retention, promotes the vessel growth, and accelerates wound healing. Conclusions This novel delivery system, which overcomes the limitations of conventional plain collagen-based delivery system in lacking of ROS-environmental responsive mechanisms, demonstrates a great potential use in stem cell therapies in wound healing.
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Affiliation(s)
- Wei Lin
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Xiaoyang Qi
- The Brain Cognition and Brain Disease Institute of Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China
| | - Wenjing Guo
- Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Danyang Liang
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Heting Chen
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Baoping Lin
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China.,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | - Xiaoyuan Deng
- MOE Key Laboratory of Laser Life Science, College of Biophotonics & Institute of Laser Life Science, South China Normal University, Guangzhou, 510631, China. .,Guangdong Provincial Key Laboratory of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China.
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2
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Mitura S, Sionkowska A, Jaiswal A. Biopolymers for hydrogels in cosmetics: review. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:50. [PMID: 32451785 PMCID: PMC7248025 DOI: 10.1007/s10856-020-06390-w] [Citation(s) in RCA: 118] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Accepted: 05/12/2020] [Indexed: 06/02/2023]
Abstract
Hydrogels are cross-linked networks of macromolecular compounds characterized by high water absorption capacity. Such materials find a wide range of biomedical applications. Several polymeric hydrogels can also be used in cosmetics. Herein, the structure, properties and selected applications of hydrogels in cosmetics are discussed in general. Detailed examples from scientific literature are also shown. In this review paper, most common biopolymers used in cosmetics are presented in detail together with issues related to skin treatment and hair conditioning. Hydrogels based on collagen, chitosan, hyaluronic acid, and other polysaccharides have been characterized. New trends in the preparation of hydrogels based on biopolymer blends as well as bigels have been shown. Moreover, biopolymer hydrogels employment in encapsulation has been mentioned.
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Affiliation(s)
- Stanisław Mitura
- President Stanisław Wojciechowski State University of Applied Sciences in Kalisz, Medical Faculty, Nowy Świat 4 st., 62-800, Kalisz, Poland
- Technical University of Liberec, Faculty of Mechanical Engineering, Department of Material Science, Liberec, Czech Republic
| | - Alina Sionkowska
- Nicolaus Copernicus University in Torun, Faculty of Chemistry, Department of Chemistry of Biomaterials and Cosmetics, Gagarin 7 street, 87-100, Torun, Poland.
| | - Amit Jaiswal
- Centre for Biomaterials Cellular and Molecular Theranostics (CBCMT) VIT, Vellore, India
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3
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Effect of two crosslinking methods on the physicochemical and biological properties of the collagen-chitosan scaffolds. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.05.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Caddeo S, Mattioli-Belmonte M, Cassino C, Barbani N, Dicarlo M, Gentile P, Baino F, Sartori S, Vitale-Brovarone C, Ciardelli G. Newly-designed collagen/polyurethane bioartificial blend as coating on bioactive glass-ceramics for bone tissue engineering applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:218-233. [DOI: 10.1016/j.msec.2018.11.012] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 11/02/2018] [Accepted: 11/07/2018] [Indexed: 10/27/2022]
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5
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Preparation and characterization of collagen/chitosan/hyaluronic acid thin films for application in hair care cosmetics. PURE APPL CHEM 2017. [DOI: 10.1515/pac-2017-0314] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn this study thin films based on a blend of collagen, chitosan and hyaluronic acids were prepared and their surface and mechanical properties were studied. The structure of the films was studied using FTIR spectroscopy, contact angle measurement and AFM images. Swelling and mechanical analyses were also performed. The hair protection possibility of collagen/chitosan/hyaluronic was studied using SEM microscopy and the mechanical testing of hair coated by the blends. It was found that the addition of hyaluronic acid to a collagen/chitosan blend improves the mechanical resistance of biopolymeric films. Samples with the addition of hyaluronic acid were more stable in aqueous conditions and provided higher roughness of surface.
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Li B, Zhang Y, Yang Y, Qiu W, Wang X, Liu B, Wang Y, Sun G. Synthesis, characterization, and antibacterial activity of chitosan/TiO 2 nanocomposite against Xanthomonas oryzae pv. oryzae. Carbohydr Polym 2016; 152:825-831. [DOI: 10.1016/j.carbpol.2016.07.070] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 07/17/2016] [Accepted: 07/17/2016] [Indexed: 11/17/2022]
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7
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Soni B, Hassan EB, Schilling MW, Mahmoud B. Transparent bionanocomposite films based on chitosan and TEMPO-oxidized cellulose nanofibers with enhanced mechanical and barrier properties. Carbohydr Polym 2016; 151:779-789. [PMID: 27474625 DOI: 10.1016/j.carbpol.2016.06.022] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 05/18/2016] [Accepted: 06/03/2016] [Indexed: 11/17/2022]
Abstract
The development of biobased active films for use in food packaging is increasing due to low cost, environmental appeal, renewability and availability. The objective of this research was to develop an effective and complete green approach for the production of bionanocomposite films with enhanced mechanical and barrier properties. This was accomplished by incorporating TEMPO-oxidized cellulose nanofibers (2,2,6,6-tetramethylpiperidine-1-oxyl radical) into a chitosan matrix. An aqueous suspension of chitosan (100-75wt%), sorbitol (25wt%) and TEMPO-oxidized cellulose nanofibers (TEMPO-CNFs, 0-25wt%) were cast in an oven at 40°C for 2-4days. Films were preconditioned at 25°C and 50% RH for characterization. The surface morphology of the films was revealed by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The thermal properties and crystal structure of the films were evaluated by thermogravimetric analysis (TGA-DTG) and X-ray diffraction (XRD). Incorporation of TEMPO-CNFs enhanced the mechanical strength of the films due to the high aspect ratio (3-20nm width, and 10-100nm length) of TEMPO-CNFs and strong interactions with the chitosan matrix. Oxygen and water vapor transmission rates for films that are prepared with chitosan and TEMPO-CNFs (15-25wt%) were significantly reduced. Furthermore, these bionanocomposite films had good thermal stability. Use of TEMPO-CNFs in this method makes it possible to produce bionanocomposite films that are flexible, transparent, and thus have potential in food packaging applications.
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Affiliation(s)
- Bhawna Soni
- Department of Sustainable Bioproducts, Mississippi State University, Box 9820, Mississippi State, MS 39762, USA
| | - El Barbary Hassan
- Department of Sustainable Bioproducts, Mississippi State University, Box 9820, Mississippi State, MS 39762, USA.
| | - M Wes Schilling
- Department of Food Science, Nutrition & Health Promotion, Mississippi State University, Box 9805, MS 39567, USA
| | - Barakat Mahmoud
- Department of Food Science, Nutrition & Health Promotion, Mississippi State University, Box 9805, MS 39567, USA; Department of Food Science, Nutrition & Health Promotion and Coastal Research & Extension Center, Mississippi State University, 3411 Frederic St., Pascagoula, MS 39567, USA
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Sionkowska A, Skrzyński S, Śmiechowski K, Kołodziejczak A. The review of versatile application of collagen. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3842] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Alina Sionkowska
- Department of Chemistry of Biomaterials and Cosmetics, Faculty of Chemistry; Nicolaus Copernicus University in Toruń; 87-100 Torun Poland
| | - Sławomir Skrzyński
- Department of Neurosurgery, Military Institute of the Health Services; Central Clinical Hospital of the Department of National Defence; Szaserów 128 00-909 Warsaw Poland
| | - Krzysztof Śmiechowski
- Faculty of Materials Science and Design; Kazimierz Pułaski University of Technology and Humanities in Radom; Chrobrego 27 26-600 Radom Poland
| | - Agata Kołodziejczak
- Department of Chemistry of Biomaterials and Cosmetics, Faculty of Chemistry; Nicolaus Copernicus University in Toruń; 87-100 Torun Poland
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Elango J, Robinson JS, Geevaretnam J, Rupia EJ, Arumugam V, Durairaj S, Wenhui W. Physicochemical and Rheological Properties of Composite Shark Catfish (P
angasius pangasius
) Skin Collagen Films Integrated with Chitosan and Calcium Salts. J Food Biochem 2015. [DOI: 10.1111/jfbc.12214] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Jeevithan Elango
- Department of Fish Quality Assurance and Management; Fish Quality Monitoring and Certification Centre; Fisheries College and Research Institute; Tamil Nadu Fisheries University; Tuticorin 628 008 India
- Department of Marine Pharmacology; College of Food Science and Technology; Shanghai Ocean University; Shanghai 201 306 China
| | - Jeya Shakila Robinson
- Department of Fish Quality Assurance and Management; Fish Quality Monitoring and Certification Centre; Fisheries College and Research Institute; Tamil Nadu Fisheries University; Tuticorin 628 008 India
| | - Jeyasekaran Geevaretnam
- Department of Fish Quality Assurance and Management; Fish Quality Monitoring and Certification Centre; Fisheries College and Research Institute; Tamil Nadu Fisheries University; Tuticorin 628 008 India
| | - Emmanuel J. Rupia
- College of Fisheries and Life Science; Shanghai Ocean University; Shanghai 201 306 China
| | - Varatharajakumar Arumugam
- Department of Fish Quality Assurance and Management; Fish Quality Monitoring and Certification Centre; Fisheries College and Research Institute; Tamil Nadu Fisheries University; Tuticorin 628 008 India
| | - Sukumar Durairaj
- Department of Fish Quality Assurance and Management; Fish Quality Monitoring and Certification Centre; Fisheries College and Research Institute; Tamil Nadu Fisheries University; Tuticorin 628 008 India
| | - Wu Wenhui
- Department of Marine Pharmacology; College of Food Science and Technology; Shanghai Ocean University; Shanghai 201 306 China
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Sionkowska A, Kaczmarek B, Gnatowska M, Kowalonek J. The influence of UV-irradiation on chitosan modified by the tannic acid addition. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 148:333-339. [PMID: 26002540 DOI: 10.1016/j.jphotobiol.2015.03.028] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 03/24/2015] [Accepted: 03/30/2015] [Indexed: 10/23/2022]
Abstract
The influence of UV-irradiation with the wavelength 254 nm on the properties of chitosan modified by the tannic acid addition was studied. Tannic acid was added to chitosan solution in different weight ratios and after solvent evaporation thin films were formed. The properties of the films such as thermal stability, Young modulus, ultimate tensile strength, moisture content, swelling behavior before and after UV-irradiation were measured and compared. Moreover, the surface properties were studied by contact angle measurements and by the use of atomic force microscopy. The results showed that UV-irradiation caused both, the degradation of the specimen and its cross-linking. The surface of the films made of chitosan modified by the addition of tannic acid was altered by UV-irradiation.
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Affiliation(s)
- A Sionkowska
- Nicolaus Copernicus University in Torun, Faculty of Chemistry, Department of Chemistry of Biomaterials and Cosmetics, Gagarin 7 street, 87-100 Toruń, Poland.
| | - B Kaczmarek
- Nicolaus Copernicus University in Torun, Faculty of Chemistry, Department of Chemistry of Biomaterials and Cosmetics, Gagarin 7 street, 87-100 Toruń, Poland
| | - M Gnatowska
- Nicolaus Copernicus University in Torun, Faculty of Chemistry, Department of Chemistry of Biomaterials and Cosmetics, Gagarin 7 street, 87-100 Toruń, Poland
| | - J Kowalonek
- Nicolaus Copernicus University in Torun, Faculty of Chemistry, Department of Chemistry of Biomaterials and Cosmetics, Gagarin 7 street, 87-100 Toruń, Poland
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11
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Tangsadthakun C, Kanokpanont S, Sanchavanakit N, Pichyangkura R, Banaprasert T, Tabata Y, Damrongsakkul S. The influence of molecular weight of chitosan on the physical and biological properties of collagen/chitosan scaffolds. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 18:147-63. [PMID: 17323850 DOI: 10.1163/156856207779116694] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Biopolymer blends between collagen and chitosan have the potential to produce cell scaffolds with biocompatible properties. However, the relationship between the molecular weight of chitosan and its effect on physical and biological properties of collagen/chitosan scaffolds has not been elucidated yet. Porous scaffolds were fabricated by freeze-drying the solution of collagen and chitosan, followed by cross-linking by dehydrothermal treatment. Various types of scaffolds were prepared using chitosan with various molecular weights and blending ratios. Fourier transform infrared spectroscopy proved that collagen and chitosan scaffolds at all blending ratios contained mainly electrostatic interactions at the molecular level. The compressive modulus decreased with increasing the concentration of chitosan. Equilibrium swelling ratios of approximately 6-8, determined in phosphate-buffered saline at physiological pH (7.4), were found in case of collagen-dominated scaffolds. The lysozyme biodegradation test demonstrated that the presence of chitosan, especially the high-molecular-weight species, could significantly prolong the biodegradation of collagen/chitosan scaffolds. In vitro culture of L929 mouse connective tissue fibroblast evidenced that low-molecular-weight chitosan was more effective to promote and accelerate cell proliferation, particularly for scaffolds containing 30 wt% chitosan. The results elucidated that the blends of collagen with low-molecular-weight chitosan have a high potential to be applied as new materials for skin-tissue engineering.
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Affiliation(s)
- Chalonglarp Tangsadthakun
- Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
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12
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Sionkowska A. Current research on the blends of natural and synthetic polymers as new biomaterials: Review. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2011.05.003] [Citation(s) in RCA: 663] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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13
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Sreeprasad TS, Maliyekkal MS, Deepti K, Chaudhari K, Xavier PL, Pradeep T. Transparent, luminescent, antibacterial and patternable film forming composites of graphene oxide/reduced graphene oxide. ACS APPLIED MATERIALS & INTERFACES 2011; 3:2643-2654. [PMID: 21688808 DOI: 10.1021/am200447p] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Multifunctional graphene oxide/reduced graphene oxide (GO/RGO) composites were prepared through electrostatic interaction using biocompatible ingredients. Different functionalities were added to GO/RGO by anchoring materials such as native lactoferrin (NLf), NLf protected Au clusters (designated as Au@NLf), chitosan (Ch) and combinations thereof. Anchoring of Ch and NLf enhances the antibacterial property of RGO/GO. The addition of Ch to RGO/GO not only helped in forming stable dispersions but also helped in fabricating large (cm(2)) area films through a simple solvent evaporation technique. Functionalities such as photoluminescence were added to Ch-RGO/GO composites by anchoring Au@NLf on it. The composites thus formed showed stable luminescence in presence of various metal ions in the solid state. The composite showed reasonable stability against pH and temperature variations as well. The as-prepared films were transparent and the transparency could be modulated by controlling the concentration of RGO/GO in the composite. The antibacterial property and ability to form stable thin films may provide an opportunity to use such composites for medical and environmental remediation applications as well. Erasable patterns were fabricated on the film by stamping required patterns under compressive pressure. Luminescent patterns can be inscribed on the film and can be erased by simply wetting it. Such films with erasable information may be useful for security applications.
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Affiliation(s)
- T S Sreeprasad
- DST Unit of Nanoscience, Department of Chemistry, Indian Institute of Technology Madras, Chennai-600 036, India
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15
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Fernandes SCM, Freire CSR, Silvestre AJD, Pascoal Neto C, Gandini A. Novel materials based on chitosan and cellulose. POLYM INT 2011. [DOI: 10.1002/pi.3024] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Nawi M, Sabar S, Jawad A, Sheilatina, Ngah WW. Adsorption of Reactive Red 4 by immobilized chitosan on glass plates: Towards the design of immobilized TiO2–chitosan synergistic photocatalyst-adsorption bilayer system. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2010.01.006] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Vorobiev AK, Menshykau D. Kinetics of photochemical reactions in optically dense media with reagent diffusion. J Photochem Photobiol A Chem 2008. [DOI: 10.1016/j.jphotochem.2008.06.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Luo K, Yin J, Khutoryanskaya OV, Khutoryanskiy VV. Mucoadhesive and Elastic Films Based on Blends of Chitosan and Hydroxyethylcellulose. Macromol Biosci 2008; 8:184-92. [PMID: 17886327 DOI: 10.1002/mabi.200700185] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Mucoadhesive polymeric films have been prepared based on blends of chitosan and hydroxyethylcellulose. The blends have been characterized by IR spectroscopy, DSC, WAXD, TGA, SEM, and mechanical testing. It is demonstrated that the mechanical properties of chitosan are improved significantly upon blending with hydroxyethylcellulose. An increase in hydroxyethylcellulose content in the blends makes the materials more elastic. The thermal treatment of the blends at 100 degrees C leads to partial cross-linking of the polymers and formation of water-insoluble but swellable materials. The adhesion of the films towards porcine buccal mucosa decreases with increasing hydroxyethylcellulose content in the blends.
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Affiliation(s)
- Kun Luo
- Shanghai University, Department of Polymer Materials, 20 Chengzhong Street, Jiading, Shanghai, 201800, China
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Sionkowska A, Wisniewski M, Skopinska J, Poggi G, Marsano E, Maxwell C, Wess T. Thermal and mechanical properties of UV irradiated collagen/chitosan thin films. Polym Degrad Stab 2006. [DOI: 10.1016/j.polymdegradstab.2006.08.009] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Habermehl J, Skopinska J, Boccafoschi F, Sionkowska A, Kaczmarek H, Laroche G, Mantovani D. Preparation of ready-to-use, stockable and reconstituted collagen. Macromol Biosci 2005; 5:821-8. [PMID: 16121339 DOI: 10.1002/mabi.200500102] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Collagen is a widely used material in biomedical applications. Although processes that prepare collagen and collagen-based materials that show suitable properties after extraction exist, a ready-to-use, easily stockable, with tailored collagen concentration has not yet been developed. Using rat tail tendons, acid soluble collagen solutions were prepared by two different methods. To improve cell viability of pure collagen films, solutions with physiological pH were also prepared by mixing with NaOH solution. Specimens in the form of thin sheets were then fabricated by solvent evaporation. Next, IR spectroscopy, tensile testing techniques as well as human fibroblast cell morphology and cytotoxicity were used to validate the significant variations in the processes. The results demonstrated that, during the synthesis of collagen stock solution, lyophilization and mechanical blending had little effect on the final properties and therefore offers a method for obtaining solutions with a more homogeneous and modifiable collagen concentration and longer storage time. Neutralizing the stock solution with aqueous NaOH prior to solvent evaporation provided films that had lower mechanical properties but significantly improved biological performance.
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Affiliation(s)
- Jason Habermehl
- Laboratory for Biomaterials and Bioengineering, Laval University and University Hospital Research Center, Québec City G1K 7P4, Canada
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Sionkowska A. Effects of solar radiation on collagen and chitosan films. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2005; 82:9-15. [PMID: 16219470 DOI: 10.1016/j.jphotobiol.2005.08.003] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2005] [Revised: 08/09/2005] [Accepted: 08/16/2005] [Indexed: 10/25/2022]
Abstract
Photo-aging and photo-degradation are the deleterious effect of chronic exposure to sun light of many materials made of natural polymers. The resistance of the products on the action of solar radiation is very important for material scientists. The effect of solar radiation on two natural polymers: collagen and chitosan as well as collagen/chitosan blends in the form of thin films has been studied by UV-Vis and FTIR spectroscopy. It was found that UV-Vis spectra, which characterise collagen and collagen/chitosan films, were significantly altered by solar radiation. FTIR spectra of collagen and collagen/chitosan films showed that after solar irradiation the positions of amide A and amide I bands were shifted to lower wavenumbers. There was not any significant alteration of chitosan UV-Vis and FTIR spectra after solar radiation. In the condition of the experiment chitosan films were resistant to the action of solar radiation. The effect of solar UV radiation in comparison to artificial UV radiation has been discussed.
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Affiliation(s)
- Alina Sionkowska
- Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, 87-100 Torun, Poland.
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