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Korica M, Mihajlovski K, Mohan T, Kostić M. Films based on TEMPO-oxidized chitosan nanoparticles: Obtaining and potential application as wound dressings. Carbohydr Res 2024; 542:109203. [PMID: 38964016 DOI: 10.1016/j.carres.2024.109203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 06/27/2024] [Accepted: 06/30/2024] [Indexed: 07/06/2024]
Abstract
A series of novel films based on TEMPO-oxidized chitosan nanoparticles were prepared by casting method. Fourier transform infrared spectroscopy (FTIR) was employed to ascertain the chemical structure of TEMPO-oxidized chitosan. The surface morphology of the TEMPO-oxidized chitosan nanoparticles was analyzed by atomic force microscopy (AFM). The physicochemical (area density, thickness, iodine sorption, roughness), functional (moisture sorption, liquid absorption capacity, weight loss upon contact with the liquid, and water vapor transmission rate), antibacterial, and antioxidant properties of films based on TEMPO-oxidized chitosan nanoparticles were also investigated. The physicochemical properties of the films varied widely: area density ranged from 77.83 ± 0.06 to184.46 ± 0.05 mg/cm2, thickness varied between 80.5 ± 1.6 and 200.5 ± 1.6 μm, iodine sorption spanned from 333.7 ± 2.1 to166.4 ± 2.2 mg I2/g, and roughness ranged from 4.1 ± 0.2 to 5.6 ± 0.3 nm. Similarly, the functional properties also varied significantly: moisture sorption ranged from 4.76 ± 0.03 to 9.62 ± 0.11 %, liquid absorption capacity was between 129.04 ± 0.24 and 159.33 ± 0.73 % after 24 h, weight loss upon contact with the liquid varied between 31.06 ± 0.35 and 45.88 ± 0.58 % after 24 h and water vapor transmission rate ranged from 1220.10 ± 2.91to1407.77 ± 5.22 g/m2 day. Despite the wide variations in physicochemical and functional properties, all films showed maximum bacterial reduction of Staphylococcus aureus and Escherichia coli, although they exhibited low antioxidant activity. The results suggest that the films could be effectively utilized as antibacterial wound dressings.
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Affiliation(s)
- Matea Korica
- Innovation Center of Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia.
| | - Katarina Mihajlovski
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia.
| | - Tamilselvan Mohan
- Institute for Chemistry and Technology of Biobased System (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010, Graz, Austria; Laboratory for Characterisation and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova ulica17, 2000, Maribor, Slovenia.
| | - Mirjana Kostić
- Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000, Belgrade, Serbia.
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2
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Wang Y, Gao H, Wang X, Li D, Zhang W, Meng X, Wang L, Zhu T, Dong P, Chen Y, Meng X. Dual cross-linked self-healing hydrogel enhanced by dopamine nanoparticles and raffinose for wound healing. Int J Biol Macromol 2024; 271:132615. [PMID: 38795900 DOI: 10.1016/j.ijbiomac.2024.132615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 05/20/2024] [Accepted: 05/22/2024] [Indexed: 05/28/2024]
Abstract
A series of intricate and dynamic physiological healing processes are involved in the healing of skin wounds. Herein, a multifunctional hydrogel is firstly designed and constructed by L-arginine-grafted O-carboxymethyl chitosan (CMCA), catechol-modified oxidized hyaluronic acid (DOHA), and dopamine nanoparticles (pDA-NPs). pDA-NPs were loaded in hydrogel for inherently powerful antimicrobial properties and could be as a cross-linking agent to construct hydrogels. Raffinose (Raf) was further incorporated to obtain CMCA-DOHA-pDA2@Raf hydrogel for its function of modulating epidermal differentiation. The hydrogel has good physicochemical properties and could promote cell proliferation and migration, which shows superior hemostatic capabilities in animal models of hemorrhage. The hydrogel significantly promoted wound healing on rat skin defect models by upregulating VEGF and CD31 and decreasing IL-6 and TNF-α, stimulating neovascularization and collagen deposition in epithelial structures. This multifunctional hydrogel implies the potential to be a dynamic wound dressing.
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Affiliation(s)
- Yudie Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Hang Gao
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Xin Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Dawei Li
- Shandong Academy of Pharmaceutical Sciences, Shandong Key Laboratory of Mucosal and Skin Drug Delivery Technology, Jinan 250101, China
| | - Wen Zhang
- Shandong Academy of Pharmaceutical Sciences, Shandong Key Laboratory of Mucosal and Skin Drug Delivery Technology, Jinan 250101, China
| | - Xuan Meng
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Lijie Wang
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Tao Zhu
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; CanSino Biologics Inc., Tianjin 300457, China
| | - Peijie Dong
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300071, China; Haihe Laboratory of Synthetic Biology, Tianjin 300308, China
| | - Yao Chen
- Shandong Academy of Pharmaceutical Sciences, Shandong Key Laboratory of Mucosal and Skin Drug Delivery Technology, Jinan 250101, China; State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin 300071, China; Haihe Laboratory of Synthetic Biology, Tianjin 300308, China
| | - Xin Meng
- Key Laboratory of Industrial Microbiology, Ministry of Education, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China; Shandong Academy of Pharmaceutical Sciences, Shandong Key Laboratory of Mucosal and Skin Drug Delivery Technology, Jinan 250101, China.
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Grange C, Aigle A, Ehrlich V, Salazar Ariza JF, Brichart T, Da Cruz-Boisson F, David L, Lux F, Tillement O. Design of a water-soluble chitosan-based polymer with antioxidant and chelating properties for labile iron extraction. Sci Rep 2023; 13:7920. [PMID: 37193699 DOI: 10.1038/s41598-023-34251-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 04/26/2023] [Indexed: 05/18/2023] Open
Abstract
Loosely bound iron, due to its contribution to oxidative stress and inflammation, has become an important therapeutic target for many diseases. A water-soluble chitosan-based polymer exhibiting both antioxidant and chelating properties due to the dual functionalization with DOTAGA and DFO has been developed to extract this iron therefore preventing its catalytic production of reactive oxygen species. This functionalized chitosan was shown to have stronger antioxidant properties compared to conventional chitosan, improved iron chelating properties compared to the clinical therapy, deferiprone, and provided promising results for its application and improved metal extraction within a conventional 4 h hemodialysis session with bovine plasma.
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Affiliation(s)
- Coralie Grange
- MexBrain, 13 avenue Albert Einstein, Villeurbanne, France
- Institut Lumière-Matière, UMR 5306, Université Lyon1-CNRS, Université de Lyon, Villeurbanne Cedex, France
| | - Axel Aigle
- MexBrain, 13 avenue Albert Einstein, Villeurbanne, France
| | - Victor Ehrlich
- Institut Lumière-Matière, UMR 5306, Université Lyon1-CNRS, Université de Lyon, Villeurbanne Cedex, France
| | - Juan Felipe Salazar Ariza
- Institut Lumière-Matière, UMR 5306, Université Lyon1-CNRS, Université de Lyon, Villeurbanne Cedex, France
- Ingénierie des Matériaux Polymères, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Institut national des Sciences Appliquées, Université Jean Monnet, Univ Lyon, 15 bd Latarjet, 69622, Villeurbanne, France
- Institut Universitaire de France (IUF), 75231, Paris, France
| | | | - Fernande Da Cruz-Boisson
- Ingénierie des Matériaux Polymères, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Institut national des Sciences Appliquées, Université Jean Monnet, Univ Lyon, 15 bd Latarjet, 69622, Villeurbanne, France
| | - Laurent David
- Ingénierie des Matériaux Polymères, CNRS UMR 5223, Univ Claude Bernard Lyon 1, Institut national des Sciences Appliquées, Université Jean Monnet, Univ Lyon, 15 bd Latarjet, 69622, Villeurbanne, France
| | - François Lux
- Institut Lumière-Matière, UMR 5306, Université Lyon1-CNRS, Université de Lyon, Villeurbanne Cedex, France.
- Institut Universitaire de France (IUF), 75231, Paris, France.
| | - Olivier Tillement
- Institut Lumière-Matière, UMR 5306, Université Lyon1-CNRS, Université de Lyon, Villeurbanne Cedex, France
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Dong P, Shi Q, Peng R, Yuan Y, Xie X. N,N-dimethyl chitosan oligosaccharide (DMCOS) promotes antifungal activity by causing mitochondrial damage. Carbohydr Polym 2023; 303:120459. [PMID: 36657838 DOI: 10.1016/j.carbpol.2022.120459] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 11/07/2022] [Accepted: 12/09/2022] [Indexed: 12/23/2022]
Abstract
By modifying chitosan oligosaccharide (COS) with the Eschweiler-Clarke reaction, the chitosan oligosaccharide derivative DMCOS was synthesized. FT-IR, 1D and 2D NMR spectra, MALDI-ToF MS, and elemental analysis were applied to analyze the structure of DMCOS, which revealed that the primary amines were converted into tertiary amines after methylation. DMCOS displayed less thermal stability than COS. In comparison to COS, it was discovered that DMCOS possessed more potent antimicrobial activity against four bacterial strains (Staphylococcus aureus, methicillin-resistant Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa) and three yeast strains (Candida albicans, Candida tropicalis, and Candida parapsilosis). The antioxidant studies indicated that DMCOS had less antioxidant activity than COS. Consequently, ROS level elevated in C. albicans cells following treatment with DMCOS, which decreased mitochondrial membrane potential. It was recalled that DMCOS may kill C. albicans by causing mitochondrial damage. In addition, DMCOS was demonstrated to be non-cytotoxic.
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Affiliation(s)
- Peng Dong
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, Guangdong 510070, People's Republic of China
| | - Qingshan Shi
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, Guangdong 510070, People's Republic of China
| | - Ruqun Peng
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, Guangdong 510070, People's Republic of China
| | - Yingzi Yuan
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, Guangdong 510070, People's Republic of China
| | - Xiaobao Xie
- Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, State Key Laboratory of Applied Microbiology Southern China, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, Guangdong 510070, People's Republic of China.
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Chuah LH, Loo HL, Goh CF, Fu JY, Ng SF. Chitosan-based drug delivery systems for skin atopic dermatitis: recent advancements and patent trends. Drug Deliv Transl Res 2023; 13:1436-1455. [PMID: 36808298 PMCID: PMC9937521 DOI: 10.1007/s13346-023-01307-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2023] [Indexed: 02/20/2023]
Abstract
Atopic dermatitis (AD) is a complex, relapsing inflammatory skin disease with a considerable social and economic burden globally. AD is primarily characterized by its chronic pattern and it can have important modifications in the quality of life of the patients and caretakers. One of the fastest-growing topics in translational medicine today is the exploration of new or repurposed functional biomaterials into drug delivery therapeutic applications. This area has gained a considerable amount of research which produced many innovative drug delivery systems for inflammatory skin diseases like AD. Chitosan, a polysaccharide, has attracted attention as a functional biopolymer for diverse applications, especially in pharmaceutics and medicine, and has been considered a promising candidate for AD treatment due to its antimicrobial, antioxidative, and inflammatory response modulation properties. The current pharmacological treatment for AD involves prescribing topical corticosteroid and calcineurin inhibitors. However, the adverse reactions associated with the long-term usage of these drugs such as itching, burning, or stinging sensation are also well documented. Innovative formulation strategies, including the use of micro- and nanoparticulate systems, biopolymer hydrogel composites, nanofibers, and textile fabrication are being extensively researched with an aim to produce a safe and effective delivery system for AD treatment with minimal side effects. This review outlines the recent development of various chitosan-based drug delivery systems for the treatment of AD published in the past 10 years (2012-2022). These chitosan-based delivery systems include hydrogels, films, micro-, and nanoparticulate systems as well as chitosan textile. The global patent trends on chitosan-based formulations for the AD are also discussed.
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Affiliation(s)
- Lay-Hong Chuah
- grid.440425.30000 0004 1798 0746School of Pharmacy, Monash University Malaysia, Bandar Sunway, 47500 Subang Jaya, Malaysia
| | - Hooi-Leong Loo
- grid.440425.30000 0004 1798 0746School of Pharmacy, Monash University Malaysia, Bandar Sunway, 47500 Subang Jaya, Malaysia
| | - Choon Fu Goh
- grid.11875.3a0000 0001 2294 3534Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia
| | - Ju-Yen Fu
- grid.410876.c0000 0001 2170 0530Malaysian Palm Oil Board, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia
| | - Shiow-Fern Ng
- Centre for Drug Delivery Technology, Faculty of Pharmacy, Universiti Kebangsaan Malaysia, 50300, Kuala Lumpur, Malaysia.
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Zhang F, Tang Y, Yang X, Pan Y, Hou Q, Ding Y, Pei J. Anti-lipid oxidation of chitosan oligosaccharide modified by laccase/TEMPO reaction. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Loo HL, Goh BH, Lee LH, Chuah LH. Application of chitosan nanoparticles in skin wound healing. Asian J Pharm Sci 2022; 17:299-332. [PMID: 35782330 PMCID: PMC9237591 DOI: 10.1016/j.ajps.2022.04.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 03/31/2022] [Accepted: 04/01/2022] [Indexed: 12/25/2022] Open
Abstract
The rising prevalence of impaired wound healing and the consequential healthcare burdens have gained increased attention over recent years. This has prompted research into the development of novel wound dressings with augmented wound healing functions. Nanoparticle (NP)-based delivery systems have become attractive candidates in constructing such wound dressings due to their various favourable attributes. The non-toxicity, biocompatibility and bioactivity of chitosan (CS)-based NPs make them ideal candidates for wound applications. This review focusses on the application of CS-based NP systems for use in wound treatment. An overview of the wound healing process was presented, followed by discussion on the properties and suitability of CS and its NPs in wound healing. The wound healing mechanisms exerted by CS-based NPs were then critically analysed and discussed in sections, namely haemostasis, infection prevention, inflammatory response, oxidative stress, angiogenesis, collagen deposition, and wound closure time. The results of the studies were thoroughly reviewed, and contradicting findings were identified and discussed. Based on the literature, the gap in research and future prospects in this research area were identified and highlighted. Current evidence shows that CS-based NPs possess superior wound healing effects either used on their own, or as drug delivery vehicles to encapsulate wound healing agents. It is concluded that great opportunities and potentials exist surrounding the use of CSNPs in wound healing.
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Oh JW, Shin J, Chun S, Muthu M, Gopal J. Evaluating the Anticarcinogenic Activity of Surface Modified/Functionalized Nanochitosan: The Emerging Trends and Endeavors. Polymers (Basel) 2021; 13:3138. [PMID: 34578039 PMCID: PMC8471611 DOI: 10.3390/polym13183138] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 09/09/2021] [Accepted: 09/15/2021] [Indexed: 11/16/2022] Open
Abstract
Chitosan begins its humble journey from marine food shell wastes and ends up as a versatile nutraceutical. This review focuses on briefly discussing the antioxidant activity of chitosan and retrospecting the accomplishments of chitosan nanoparticles as an anticarcinogen. The various modified/functionalized/encapsulated chitosan nanoparticles and nanoforms have been listed and their biomedical deliverables presented. The anticancer accomplishments of chitosan and its modified composites have been reviewed and presented. The future of surface modified chitosan and the lacunae in the current research focus have been discussed as future perspective. This review puts forth the urge to expand the scientific curiosity towards attempting a variety of functionalization and surface modifications to chitosan. There are few well known modifications and functionalization that benefit biomedical applications that have been proven for other systems. Being a biodegradable, biocompatible polymer, chitosan-based nanomaterials are an attractive option for medical applications. Therefore, maximizing expansion of its bioactive properties are explored. The need for applying the ideal functionalization that will significantly promote the anticancer contributions of chitosan nanomaterials has also been stressed.
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Affiliation(s)
- Jae-Wook Oh
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 143-701, Korea; (J.-W.O.); (J.S.)
| | - Juhyun Shin
- Department of Stem Cell and Regenerative Biotechnology, Konkuk University, Seoul 143-701, Korea; (J.-W.O.); (J.S.)
| | - Sechul Chun
- Department of Environmental Health Science, Konkuk University, Seoul 143-701, Korea; (S.C.); (M.M.)
| | - Manikandan Muthu
- Department of Environmental Health Science, Konkuk University, Seoul 143-701, Korea; (S.C.); (M.M.)
| | - Judy Gopal
- Department of Environmental Health Science, Konkuk University, Seoul 143-701, Korea; (S.C.); (M.M.)
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Doan VK, Ly KL, Tran NMP, Ho TPT, Ho MH, Dang NTN, Chang CC, Nguyen HTT, Ha PT, Tran QN, Tran LD, Vo TV, Nguyen TH. Characterizations and Antibacterial Efficacy of Chitosan Oligomers Synthesized by Microwave-Assisted Hydrogen Peroxide Oxidative Depolymerization Method for Infectious Wound Applications. MATERIALS (BASEL, SWITZERLAND) 2021; 14:4475. [PMID: 34442997 PMCID: PMC8399586 DOI: 10.3390/ma14164475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/19/2021] [Accepted: 07/21/2021] [Indexed: 11/17/2022]
Abstract
The use of naturally occurring materials with antibacterial properties has gained a great interest in infected wound management. Despite being an abundant resource in Vietnam, chitosan and its derivatives have not yet been intensively explored for their potential in such application. Here, we utilized a local chitosan source to synthesize chitosan oligomers (OCS) using hydrogen peroxide (H2O2) oxidation under the microwave irradiation method. The effects of H2O2 concentration on the physicochemical properties of OCS were investigated through molecular weight, degree of deacetylation, and heavy metal contamination for optimization of OCS formulation. Then, the antibacterial inhibition was examined; the minimum inhibitory concentration and minimum bactericidal concentration (MIC and MBC) of OCS-based materials were determined against common skin-inhabitant pathogens. The results show that the local Vietnamese chitosan and its derivative OCS possessed high-yield purification while the molecular weight of OCS was inversely proportional and proportional to the concentration of H2O2, respectively. Further, the MIC and MBC of OCS ranged from 3.75 to less than 15 mg/mL and 7.5-15 mg/mL, respectively. Thus, OCS-based materials induce excellent antimicrobial properties and can be attractive for wound dressings and require further investigation.
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Affiliation(s)
- Vinh Khanh Doan
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Khanh Loan Ly
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Nam Minh-Phuong Tran
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Trinh Phuong-Thi Ho
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Minh Hieu Ho
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Nhi Thao-Ngoc Dang
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Cheng-Chung Chang
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taichung City 40227, Taiwan;
| | - Hoai Thi-Thu Nguyen
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
- School of Biotechnology, International University, Ho Chi Minh City 700000, Vietnam
| | - Phuong Thu Ha
- Institute of Materials Science, Vietnam Academy of Science and Technology, Ha Noi 100000, Vietnam;
| | - Quyen Ngoc Tran
- Institute of Applied Materials Science, Vietnam Academy Science and Technology, Ho Chi Minh City 700000, Vietnam;
- Graduate University of Science and Technology Viet Nam, Vietnam Academy of Science and Technology, Ho Chi Minh City 700000, Vietnam
| | - Lam Dai Tran
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 100000, Vietnam;
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 100000, Vietnam
| | - Toi Van Vo
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
| | - Thi Hiep Nguyen
- Department of Tissue Engineering and Regenerative Medicine, School of Biomedical Engineering, International University, Ho Chi Minh City 700000, Vietnam; (V.K.D.); (K.L.L.); (N.M.-P.T.); (T.P.-T.H.); (M.H.H.); (N.T.-N.D.); (T.V.V.)
- Vietnam National University, Ho Chi Minh City 700000, Vietnam;
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Yang Y, Liang Y, Chen J, Duan X, Guo B. Mussel-inspired adhesive antioxidant antibacterial hemostatic composite hydrogel wound dressing via photo-polymerization for infected skin wound healing. Bioact Mater 2021; 8:341-354. [PMID: 34541405 PMCID: PMC8427086 DOI: 10.1016/j.bioactmat.2021.06.014] [Citation(s) in RCA: 226] [Impact Index Per Article: 75.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 06/04/2021] [Accepted: 06/11/2021] [Indexed: 12/14/2022] Open
Abstract
With the increasing prevalence of drug-resistant bacterial infections and the slow healing of chronically infected wounds, the development of new antibacterial and accelerated wound healing dressings has become a serious challenge. In order to solve this problem, we developed photo-crosslinked multifunctional antibacterial adhesive anti-oxidant hemostatic hydrogel dressings based on polyethylene glycol monomethyl ether modified glycidyl methacrylate functionalized chitosan (CSG-PEG), methacrylamide dopamine (DMA) and zinc ion for disinfection of drug-resistant bacteria and promoting wound healing. The mechanical properties, rheological properties and morphology of hydrogels were characterized, and the biocompatibility of these hydrogels was studied through cell compatibility and blood compatibility tests. These hydrogels were tested for the in vitro blood-clotting ability of whole blood and showed good hemostatic ability in the mouse liver hemorrhage model and the mouse-tail amputation model. In addition, it has been confirmed that the multifunctional hydrogels have good inherent antibacterial properties against Methicillin-resistant Staphylococcus aureus (MRSA). In the full-thickness skin defect model infected with MRSA, the wound closure ratio, thickness of granulation tissue, number of collagen deposition, regeneration of blood vessels and hair follicles were measured. The inflammation-related cytokines (CD68) and angiogenesis-related cytokines (CD31) expressed during skin regeneration were studied. All results indicate that these multifunctional antibacterial adhesive hemostatic hydrogels have better healing effects than commercially available Tegaderm™ Film, revealing that they have become promising alternative in the healing of infected wounds. Antibacterial antioxidant adhesion hydrogel was obtained by photopolymerization. These hydrogels exhibited good hemostatic property and cell compatibility. The hydrogels showed good antibacterial property against MRSA. The hydrogels significantly enhanced wound healing of infected skin wound.
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Affiliation(s)
- Yutong Yang
- Second Department of General Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China.,Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Yongping Liang
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jueying Chen
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Xianglong Duan
- Second Department of General Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China.,Second Department of General Surgery, Third Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710068, China
| | - Baolin Guo
- Frontier Institute of Science and Technology, and State Key Laboratory for Mechanical Behavior of Materials, and Key Laboratory of Shaanxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi'an Jiaotong University, Xi'an, 710049, China
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Yi J, Huang H, Wen Z, Fan Y. Fabrication of chitosan-gallic acid conjugate for improvement of physicochemical stability of β-carotene nanoemulsion: Impact of Mw of chitosan. Food Chem 2021; 362:130218. [PMID: 34087713 DOI: 10.1016/j.foodchem.2021.130218] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 05/14/2021] [Accepted: 05/17/2021] [Indexed: 10/21/2022]
Abstract
In this research, three various Mw of chitosan (CS)-gallic acid (GA) conjugates were synthesized, characterized, and used for improvement of physicochemical stability of β-carotene (BC) nanoemulsion (NE) by layer-by-layer technique. GA conjugation degrees were in the following order: HCS (125.6 mg/g) > MCS (102.3 mg/g) > LCS (74.6 mg/g) at GA:CS mass ratio of 0.5:1. Three varying Mw of CS-GA conjugates exhibited pronouncedly higher antioxidant abilities than native CS. For native CS, antioxidant abilities increased with the decrease of Mw. However, HCS-GA conjugate showed the highest antioxidant activity, due to the higher GA conjugation degrees and decreased intramolecular hydrogen bonds and crystallinity in HCS-GA conjugate. CS-GA conjugates substantially improved BC chemical stability in NE than CS and BC retentions were in the following order: HCS-GA (76.8%) > MCS-GA (68.3%) > LCS-GA (53.4%) after 30 days storage. The results obtained may provide some useful information for the applications of CS-GA conjugates for nutraceuticals stabilization in food systems.
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Affiliation(s)
- Jiang Yi
- Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China.
| | - Huimin Huang
- Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Zhen Wen
- Department of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
| | - Yuting Fan
- School of Public Health, Health Science Center, Shenzhen University, Shenzhen, Guangdong 518060, China.
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Saravanakumar K, Mariadoss AVA, Sathiyaseelan A, Wang MH. Synthesis and characterization of nano-chitosan capped gold nanoparticles with multifunctional bioactive properties. Int J Biol Macromol 2020; 165:747-757. [DOI: 10.1016/j.ijbiomac.2020.09.177] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Revised: 09/08/2020] [Accepted: 09/21/2020] [Indexed: 12/18/2022]
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Elgegren M, Kim S, Cordova D, Silva C, Noro J, Cavaco-Paulo A, Nakamatsu J. Ultrasound-Assisted Encapsulation of Sacha Inchi ( Plukenetia volubilis Linneo.) Oil in Alginate-Chitosan Nanoparticles. Polymers (Basel) 2019; 11:E1245. [PMID: 31357570 PMCID: PMC6723186 DOI: 10.3390/polym11081245] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 07/17/2019] [Accepted: 07/18/2019] [Indexed: 12/15/2022] Open
Abstract
Sacha inchi oil is rich in essential and non-essential fatty acids and other types of bioactive agents like tocopherols and polyphenolic compounds, which are very well-known antioxidants. In this study, the encapsulation of sacha inchi oil in alginate (AL) and chitosan (CS) nanoparticles was achieved with the assistance of high-intensity ultrasound. Nanoemulsion is the most effective delivery and high stability system for lipophilic bioactive agents. Chitosan and surfactant concentrations were varied to study their effect on particle formulations. Size, zeta-potential, polydispersity, and stability of particles were determined in time to optimize the preparation conditions. Sacha inchi oil encapsulated in AL-CS nanoparticles showed a higher loading efficiency and stability for short and long periods compared with other vegetable oils such as olive and soybean. Also, because of the types of tocopherols present in sacha inchi oil (γ- and δ-tocopherols), a much higher antioxidant activity (95% of radical reduction in 15 min) was found in comparison with nanocapsules with olive oil, which contain α-tocopherols. The particles showed high efficiency of protein loading at high concentration of bovine serum albumin (BSA) and a low rate of leaching profiles in various testing media like simulated gastric and intestinal fluids with/without enzymes, that is, pepsin 0.1% (w/v) and pancreatin 0.1% (w/v), respectively.
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Affiliation(s)
- Mariela Elgegren
- Department of Science, Chemistry Division, Pontificia Universidad Católica del Perú PUCP, Av. Universitaria 1801, Lima 32, Peru
| | - Suyeon Kim
- Department of Engineering, Pontificia Universidad Católica del Perú PUCP, Av. Universitaria 1801, Lima 32, Peru.
| | - Diego Cordova
- Department of Science, Chemistry Division, Pontificia Universidad Católica del Perú PUCP, Av. Universitaria 1801, Lima 32, Peru
| | - Carla Silva
- Centre of Biological Engineering, University of Minho, Campus De Gualtar, 4710-057 Braga, Portugal
| | - Jennifer Noro
- Centre of Biological Engineering, University of Minho, Campus De Gualtar, 4710-057 Braga, Portugal
| | - Artur Cavaco-Paulo
- Centre of Biological Engineering, University of Minho, Campus De Gualtar, 4710-057 Braga, Portugal
| | - Javier Nakamatsu
- Department of Science, Chemistry Division, Pontificia Universidad Católica del Perú PUCP, Av. Universitaria 1801, Lima 32, Peru
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Lee YH, Park SY, Park JE, Jung BO, Park JE, Park JK, Hwang YJ. Anti-Oxidant Activity and Dust-Proof Effect of Chitosan with Different Molecular Weights. Int J Mol Sci 2019; 20:ijms20123085. [PMID: 31238572 PMCID: PMC6627310 DOI: 10.3390/ijms20123085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 06/20/2019] [Accepted: 06/20/2019] [Indexed: 12/19/2022] Open
Abstract
High molecular weight chitosan (HMWC) was degraded to prepare chitosan with different molecular weight based on the fenton reaction, which can produce aggressive OH-radicals produced from hydrogen peroxide in the presence of catalytic metal ions. The relative molecular weight, anti-oxidant activity, and fine dust removal effect of chitosan hydrolysates were elucidated to define their molecular weight and their potent biological activity. Our results demonstrate that chitosan hydrolysates derived from the hydrolysis of HMWC may possess significant free-radical scavenging activity as good anti-oxidants against the radical scavenging activity of DPPH and ABTS, respectively. Furthermore, chitosan hydrolysates can effectively eliminate fine dust, which may contain some particulate matter (PM) and unknown species of microorganisms from the air, suggesting that our data provide important information for producing air filters, dust-proof masks and skin cleaner for the purpose of human healthcare and well-being.
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Affiliation(s)
- Yong Hyun Lee
- Department Biomedical Engineering, College of Health Science, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Korea.
| | - So Yeon Park
- Department of Life Sciences, Gachon University, Seongnamdaero 1342, Seongnam-si, Gyeonggi-do 461-701, Korea.
| | - Jae Eun Park
- Department of Chemical and Biochemical Engineering, Dongguk University, 30, Pildong-ro 1-gil, Jung-gu, Seoul 04620, Korea.
| | - Byung Ok Jung
- Institute of Red Snow Crab, Nonggongdanji-gil 76, Sokcho-si, Gangwon-do 24899, Korea.
| | - Jung Eun Park
- Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea.
| | - Jae Kweon Park
- Department of Life Sciences, Gachon University, Seongnamdaero 1342, Seongnam-si, Gyeonggi-do 461-701, Korea.
| | - You Jin Hwang
- Department Biomedical Engineering, College of Health Science, 191 Hambakmoe-ro, Yeonsu-gu, Incheon 21936, Korea.
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15
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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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Competitive Biological Activities of Chitosan and Its Derivatives: Antimicrobial, Antioxidant, Anticancer, and Anti-Inflammatory Activities. INT J POLYM SCI 2018. [DOI: 10.1155/2018/1708172] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Chitosan is obtained from alkaline deacetylation of chitin, and acetamide groups are transformed into primary amino groups during the deacetylation. The diverse biological activities of chitosan and its derivatives are extensively studied that allows to widening the application fields in various sectors especially in biomedical science. The biological properties of chitosan are strongly depending on the solubility in water and other solvents. Deacetylation degree (DDA) and molecular weight (MW) are the most decisive parameters on the bioactivities since the primary amino groups are the key functional groups of chitosan where permits to interact with other molecules. Higher DDA and lower MW of chitosan and chitosan derivatives demonstrated higher antimicrobial, antioxidant, and anticancer capacities. Therefore, the chitosan oligosaccharides (COS) with a low polymerization degree are receiving a great attention in medical and pharmaceutical applications as they have higher water solubility and lower viscosity than chitosan. In this review articles, the antimicrobial, antioxidant, anticancer, anti-inflammatory activities of chitosan and its derivatives are highlighted. The influences of physicochemical parameters of chitosan like DDA and MW on bioactivities are also described.
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Kim S, Requejo KI, Nakamatsu J, Gonzales KN, Torres FG, Cavaco-Paulo A. Modulating antioxidant activity and the controlled release capability of laccase mediated catechin grafting of chitosan. Process Biochem 2017. [DOI: 10.1016/j.procbio.2016.12.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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18
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Zhang J, Zhao P, Liu B, Meng X. Use of Oligochitosan as an Inhibiting Agent of Apple Juice Enzymatic Browning. J FOOD PROCESS PRES 2016. [DOI: 10.1111/jfpp.13062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Jing Zhang
- College of Food Science and Engineering; Ocean University of China; Qingdao 266003 China
| | - Pan Zhao
- College of Food Science and Engineering; Ocean University of China; Qingdao 266003 China
| | - Bingjie Liu
- College of Food Science and Engineering; Ocean University of China; Qingdao 266003 China
| | - Xianghong Meng
- College of Food Science and Engineering; Ocean University of China; Qingdao 266003 China
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Targeted Delivery of Superoxide Dismutase by Chemical Modification with Quaternary Ammonium Chitosan and Pharmacokinetic Analysis. J Pharm Innov 2015. [DOI: 10.1007/s12247-015-9231-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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20
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Improving the hydrogen peroxide bleaching efficiency of aspen chemithermomechanical pulp by using chitosan. Carbohydr Polym 2015; 132:430-6. [PMID: 26256367 DOI: 10.1016/j.carbpol.2015.06.062] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Revised: 06/17/2015] [Accepted: 06/19/2015] [Indexed: 11/21/2022]
Abstract
The presence of transition metals during the hydrogen peroxide bleaching of pulp results in the decomposition of hydrogen peroxide, which decreases the bleaching efficiency. In this study, chitosans were used as peroxide stabilizer in the alkaline hydrogen peroxide bleaching of aspen chemithermomechanical pulp (CTMP). The results showed that the brightness of the bleached CTMP increased 1.5% ISO by addition of 0.1% chitosan with 95% degree of deacetylation during peroxide bleaching. Transition metals in the form of ions or metal colloid particles, such as iron, copper and manganese, could be adsorbed by chitosans. Chitosans could inhibit the decomposition of hydrogen peroxide catalyzed by different transition metals under alkaline conditions. The ability of chitosans to inhibit peroxide decomposition depended on the type of transition metals, chitosan concentration and degree of deacetylation applied. The addition of chitosan slightly reduced the concentration of the hydroxyl radical formed during the hydrogen peroxide bleaching of aspen CTMP.
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An Investigation of the Effect of Chitosan on Isothermal Crystallization, Thermal Decomposition, and Melt Index of Biodegradable Poly(L-lactic acid). INT J POLYM SCI 2015. [DOI: 10.1155/2015/296380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Biodegradable chitosan (CS) was introduced into another biodegradable poly(L-lactic acid) (PLLA) to prepare the PLLA/CS composites, and the effect of CS on thermal behavior and melt index of PLLA was investigated using modern testing technologies including optical depolarizer, thermogravimetric analysis instrument, and melt index instrument. The relevant testing results showed that both crystallization temperature and CS concentration affected the isothermal crystallization behavior of PLLA. Compared to neat PLLA, thet1/2of PLLA/5% CS decreased from 2991.54 s to the minimum value 208.76 s at 105°C. However, thet1/2of PLLA/CS composites in high crystallization temperature zone was different from that in low crystallization temperature zone. The increase of CS concentration and heating rate made the thermal decomposition temperature of PLLA/CS composites shift to higher temperature. The melt index results indicated that 3% CS made the fluidity of PLLA become better.
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Bioactivity of Chitosan Derivatives. POLYSACCHARIDES 2015. [DOI: 10.1007/978-3-319-16298-0_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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23
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Bioactivity of Chitosan Derivative. POLYSACCHARIDES 2014. [DOI: 10.1007/978-3-319-03751-6_17-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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24
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Wan A, Xu Q, Sun Y, Li H. Antioxidant activity of high molecular weight chitosan and N,O-quaternized chitosans. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:6921-6928. [PMID: 23706102 DOI: 10.1021/jf402242e] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The objective of this study was to evaluate the in vitro antioxidant activity of high molecular weight chitosan based films. Three kinds of water-soluble quaternized chitosans with high molecular weight, namely N-(2-hydroxyl) propyl-3-trimethyl ammonium chitosan chloride (400-HTCC and 1240-HTCC), N-(2-hydroxyl) propyl-3-triethyl ammonium chitosan chloride (400-HTEC and 1240-HTEC), and O-(2-hydroxyl) propyl-3- trimethyl ammonium chitosan chloride (400-O-HTCC) were prepared from high molecular weight chitosans (400 and 1240 kDa). The in vitro antioxidant activity of a high molecular weight chitosan (1240-CS) and five quaternized chitosans was evaluated and compared as radical scavengers against 1,1-diphenyl-2-picrylhydrazyl radicals (DPPH•), hydroxyl radical (•OH), and superoxide radical (•O2(-)) using established methods, and the effect of the molecular weight, the concentration, the newly generated hydroxyl group, the extra introduced positive charge of quaternary ammonium salt group, etc., on the antioxidant activity of these high molecular weight chitosans is discussed. The data obtained in vitro models exhibited good antioxidant potency and suggested the possibility that high molecular weight chitosan based films could be effectively employed as natural antioxidant materials for application in the field of food and medicine.
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Affiliation(s)
- Ajun Wan
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
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