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Hajihassan Z, Ghaee A, Bazargannia P, Salmani Shahrivar E. Affinity purification/immobilization of poly histidine-tagged proteins by nickel-functionalized porous chitosan membranes. J Chromatogr A 2024; 1722:464902. [PMID: 38636150 DOI: 10.1016/j.chroma.2024.464902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 03/27/2024] [Accepted: 04/09/2024] [Indexed: 04/20/2024]
Abstract
Although immobilized metal ion affinity chromatography (IMAC) is one of the most effective methods for purifying his-tagged proteins, it has limitations such as expensive commercial resins and non-specific binding of unwanted proteins to the nickel immobilized on the resin. In this study, biocompatible chitosan and porous chitosan membranes as alternative resins were synthesized for protein immobilization and purification, but finally porous chitosan membrane was selected due to its higher porosity and consequently higher nickel adsorption. Once the membrane was functionalized with nickel ions and its metal adsorption confirmed by EDS and ICP methods, it was used to immobilize and purify recombinant β-NGF as a protein model with his-tag tail in batch-fashion. Protein binding and purification were also approved by FTIR and UV-Vis spectroscopy and SDS-PAGE technique. Our results indicated that the protein of interest could bind to the nickel-functionalized porous chitosan membrane with high efficiency at pH=7. Furthermore, for protein purification, the pH value of 6 and an imidazole concentration of 750 mM were suggested for the final elution buffer. In conclusion, nickel-functionalized porous chitosan membrane could be a suitable alternative to IMAC for low cost and specific protein immobilization and purification.
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Affiliation(s)
- Zahra Hajihassan
- School of Life Science Engineering, College of Interdisciplinary Science and Technology, University of Tehran, Tehran, Iran.
| | - Azadeh Ghaee
- School of Life Science Engineering, College of Interdisciplinary Science and Technology, University of Tehran, Tehran, Iran.
| | - Parisa Bazargannia
- School of Life Science Engineering, College of Interdisciplinary Science and Technology, University of Tehran, Tehran, Iran
| | - Elahe Salmani Shahrivar
- School of Life Science Engineering, College of Interdisciplinary Science and Technology, University of Tehran, Tehran, Iran
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2
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Zhang Z, Ma Z, Song L, Farag MA. Maximizing crustaceans (shrimp, crab, and lobster) by-products value for optimum valorization practices: A comparative review of their active ingredients, extraction, bioprocesses and applications. J Adv Res 2024; 57:59-76. [PMID: 37931655 PMCID: PMC10918363 DOI: 10.1016/j.jare.2023.11.002] [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: 04/13/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 11/08/2023] Open
Abstract
BACKGROUND The processing of the three major crustaceans (shrimp, lobster, and crab) is associated with inevitable by-products, high waste disposal costs, environmental and human health issues, loss of multiple biomaterials (chitin, protein hydrolysates, lipids, astaxanthin and minerals). Nowadays, these bioresources are underutilized owing to the lack of effective and standardized technologies to convert these materials into valued industrial forms. AIM OF REVIEW This review aims to provide a holistic overview of the various bioactive ingredients and applications within major crustaceans by-products. This review aims to compare various extraction methods in crustaceans by-products, which will aid identify a more workable platform to minimize waste disposal and maximize its value for best valorization practices. KEY SCIENTIFIC CONCEPTS OF REVIEW The fully integrated applications (agriculture, food, cosmetics, pharmaceuticals, paper industries, etc.) of multiple biomaterials from crustaceans by-products are presented. The pros and cons of the various extraction methods, including chemical (acid and alkali), bioprocesses (enzymatic or fermentation), physical (microwave, ultrasound, hot water and carbonic acid process), solvent (ionic liquids, deep eutectic solvents, EDTA) and electrochemistry are detailed. The rapid development of corresponding biotechnological attempts present a simple, fast, effective, clean, and controllable bioprocess for the comprehensive utilization of crustacean waste that has yet to be applied at an industrial level. One feasible way for best valorization practices is to combine innovative extraction techniques with industrially applicable technologies to efficiently recover these valuable components.
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Affiliation(s)
- Zuying Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China; Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Zhenmin Ma
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Lili Song
- State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China; Zhejiang Provincial Key Laboratory of Forest Aromatic Plants-based Healthcare Functions, Zhejiang A&F University, Lin'an 311300, Zhejiang Province, People's Republic of China
| | - Mohamed A Farag
- Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr el Aini st., Cairo P.B. 11562, Egypt.
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Ben Amor I, Hemmami H, Laouini SE, Zeghoud S, Benzina M, Achour S, Naseef A, Alsalme A, Barhoum A. Use of Insect-Derived Chitosan for the Removal of Methylene Blue Dye from Wastewater: Process Optimization Using a Central Composite Design. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5049. [PMID: 37512323 PMCID: PMC10383991 DOI: 10.3390/ma16145049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 07/02/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023]
Abstract
Insects are a readily available source of chitosan due to their high reproductive rates, ease of breeding, and resistance to changes in their ecosystem. This study aimed to extract chitosan from several widespread insects: Blaps lethifera (CS-BL), Pimelia fernandezlopezi (CS-PF), and Musca domestica (CS-MD). The study was also extended to using the obtained chitosans in removing methylene blue dye (MB) from wastewater. The source of the chitosan, the initial concentration of MB dye, and the reaction time were chosen as the working parameters. The experiments were designed using a central composite design (CCD) based on the dye removal efficiency as the response variable. The experimental work and statistical calculation of the CCD showed that the dye removal efficiency ranged from 35.9% to 88.7% for CS-BL, from 18.8% to 47.1% for CS-PF, and from 10.3% to 29.0% for CS-MD at an initial MB concentration of 12.79 mg/L. The highest methylene blue dye removal efficiency was 88.7% for CS-BL at a reaction time of 120 min. This indicates that the extraction of chitosan from insects (Blaps lethifera) and its application in dye removal is a promising, environmentally friendly, economical, biodegradable, and cost-effective process. Furthermore, the CCD is a statistical experimental design technique that can be used to optimize process variables for removing other organic pollutants using chitosan.
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Affiliation(s)
- Ilham Ben Amor
- Department of Process Engineering and Petrochemical, Faculty of Technology, University of El Oued, El Oued 39000, Algeria
- Renewable Energy Development unit in Arid Zones (UDERZA), University of El Oued, El Oued 39000, Algeria
| | - Hadia Hemmami
- Department of Process Engineering and Petrochemical, Faculty of Technology, University of El Oued, El Oued 39000, Algeria
- Renewable Energy Development unit in Arid Zones (UDERZA), University of El Oued, El Oued 39000, Algeria
| | - Salah Eddine Laouini
- Department of Process Engineering and Petrochemical, Faculty of Technology, University of El Oued, El Oued 39000, Algeria
- Laboratory of Biotechnology Biomaterials and Condensed Materials, Faculte de la Technologie, University of El Oued, El Oued 39000, Algeria
| | - Soumeia Zeghoud
- Department of Process Engineering and Petrochemical, Faculty of Technology, University of El Oued, El Oued 39000, Algeria
- Renewable Energy Development unit in Arid Zones (UDERZA), University of El Oued, El Oued 39000, Algeria
| | - Mourad Benzina
- Water, Energy and Environment Laboratory, National School of Engineers of Sfax, University of Sfax, Sfax 3083, Tunisia
| | - Sami Achour
- Institut Supérieur de Biotechnologie de Monastir ISBM, Monastir 5000, Tunisia
| | - Abanoub Naseef
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Cairo 11795, Egypt
| | - Ali Alsalme
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Ahmed Barhoum
- NanoStruc Research Group, Chemistry Department, Faculty of Science, Helwan University, Cairo 11795, Egypt
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From the problem to the solution: Chitosan valorization cycle. Carbohydr Polym 2023; 309:120674. [PMID: 36906370 DOI: 10.1016/j.carbpol.2023.120674] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 02/02/2023] [Accepted: 02/03/2023] [Indexed: 02/11/2023]
Abstract
The problem of fisheries waste has increased in recent years and has become a global problem influenced by various biological, technical, operational and socioeconomic factors. In this context, the use of these residues as raw materials is a proven approach not only to reduce the crisis of unprecedented magnitude facing the oceans, but also to improve the management of marine resources and increase the competitiveness of the fisheries sector. However, the implementation of valorization strategies at the industrial level is being excessively slow, despite this great potential. Chitosan, a biopolymer extracted from shellfish waste, is a clear example of this because although countless chitosan-based products have been described for a wide variety of applications, commercial products are still limited. To address this drawback, it is essential to consolidate a "bluer" chitosan valorization cycle towards sustainability and circular economy. In this perspective we wanted to focus on the cycle of valorization of chitin, which allows to transform a waste product (chitin) into a material suitable for the development of useful products to solve the source of its origin as a waste product and pollutant; chitosan-based membranes for wastewater remediation.
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Gradinaru LM, Barbalata-Mandru M, Enache AA, Rimbu CM, Badea GI, Aflori M. Chitosan Membranes Containing Plant Extracts: Preparation, Characterization and Antimicrobial Properties. Int J Mol Sci 2023; 24:ijms24108673. [PMID: 37240023 DOI: 10.3390/ijms24108673] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 04/28/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
The main strategy of this study was to combine the traditional perspective of using medicinal extracts with polymeric scaffolds manufactured by an engineering approach to fabricate a potential dressing product with antimicrobial properties. Thus, chitosan-based membranes containing S. officinalis and H. perforatum extracts were developed and their suitability as novel dressing materials was investigated. The morphology of the chitosan-based films was assessed by scanning electron microscopy (SEM) and the chemical structure characterization was performed via Fourier transform infrared spectroscopy (FTIR). The addition of the plant extracts increased the sorption capacity of the studied fluids, mainly at the membrane with S. officinalis extract. The membranes with 4% chitosan embedded with both plant extracts maintained their integrity after being immersed for 14 days in incubation media, especially in PBS. The antibacterial activities were determined by the modified Kirby-Bauer disk diffusion method for Gram-positive (S. aureus ATCC 25923, MRSA ATCC 43300) and Gram-negative (E. coli ATCC 25922, P. aeruginosa ATCC 27853) microorganisms. The antibacterial property was enhanced by incorporating the plant extracts into chitosan films. The outcome of the study reveals that the obtained chitosan-based membranes are promising candidates to be used as a wound dressing due to their good physico-chemical and antimicrobial properties.
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Affiliation(s)
- Luiza Madalina Gradinaru
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Mihaela Barbalata-Mandru
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | | | - Cristina Mihaela Rimbu
- Department of Public Health, Faculty of Veterinary Medicine "Ion Ionescu de la Brad", University of Life Sciences, 8 Mihail Sadoveanu Alley, 707027 Iasi, Romania
| | - Georgiana Ileana Badea
- National Institute of Research and Development for Biological Sciences, 296 Independentei Bd. District 6, 060031 Bucharest, Romania
| | - Magdalena Aflori
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
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Zárate-Moreno JC, Escobar-Sierra DM, Ríos-Estepa R. Development and Evaluation of Chitosan-Based Food Coatings for Exotic Fruit Preservation. BIOTECH 2023; 12:biotech12010020. [PMID: 36810447 PMCID: PMC9944848 DOI: 10.3390/biotech12010020] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/27/2023] [Accepted: 02/10/2023] [Indexed: 02/16/2023] Open
Abstract
Chitosan has gained agro-industrial interest due to its potential applications in food preservation. In this work, chitosan applications for exotic fruit coating, using feijoa as a case of study, were evaluated. For this, we synthetized and characterized chitosan from shrimp shells and tested its performance. Chemical formulations for coating preparation using chitosan were proposed and tested. Mechanical properties, porosity, permeability, and fungal and bactericidal characteristics were used to verify the potential application of the film in the protection of fruits. The results indicated that synthetized chitosan has comparable properties to commercial chitosan (deacetylation degree > 82%), and, for the case of feijoa, the chitosan coating achieved significant reduction of microorganisms and fungal growth (0 UFC/mL for sample 3). Further, membrane permeability allowed oxygen exchange suitable for fruit freshness and natural physiological weight loss, thus delaying oxidative degradation and prolonging shelf-life. Chitosan's characteristic of a permeable film proved to be a promising alternative for the protection and extension of the freshness of post-harvest exotic fruits.
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Affiliation(s)
- Juan Camilo Zárate-Moreno
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52–21, Medellín 050010, Colombia
- Grupo de Biomateriales, Programa de Bioingeniería, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52–21, Medellín 050010, Colombia
| | - Diana Marcela Escobar-Sierra
- Grupo de Biomateriales, Programa de Bioingeniería, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52–21, Medellín 050010, Colombia
| | - Rigoberto Ríos-Estepa
- Grupo de Bioprocesos, Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52–21, Medellín 050010, Colombia
- Correspondence: ; Tel.: +57-4-2198568
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Victorelli FD, Rodero CF, Lutz-Bueno V, Chorilli M, Mezzenga R. Amyloid Fibrils Enhance the Topical Bio-Adhesivity of Liquid Crystalline Mesophase-Based Drug Formulations. Adv Healthc Mater 2023; 12:e2202720. [PMID: 36681654 DOI: 10.1002/adhm.202202720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Revised: 01/08/2023] [Indexed: 01/23/2023]
Abstract
Despite their distinctive secondary structure based on cross β-strands, amyloid fibrils (AF) are stable fibrous protein aggregates with features similar to collagen, one of the main components of the extracellular matrix, and thus constitute a potential scaffold for enhancing cell adhesion for topical applications. Here, the contribution of AF to skin bio-adhesivity aiming toward topical treatments is investigated. Liquid crystalline mesophase (LCM) based on phytantriol is formulated, with the aqueous phase containing either water or a solution of 4 wt% amyloid fibrils. Then resveratrol is added as a model anti-inflammatory molecule. The developed LCM presents a double gyroid Ia3d mesophase. The incorporation of AF into the LCM increases its bio-adhesive properties. In vitro release and ex vivo permeation and retention confirm the controlled release property of the system, and that resveratrol is retained in epidermis and dermis, but is also permeated through the skin. All formulations are biocompatible with L929 cells. The in vivo assay confirms that systems with AF lead to a higher anti-inflammatory effect of resveratrol. These results confirm the hypothesis that the incorporation of AF in the LCM increases the bio-adhesiveness and efficiency of the system for topical treatment, and consequently, the therapeutical action of the encapsulated drug.
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Affiliation(s)
| | - Camila Fernanda Rodero
- Department of Drugs and Medicine, School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil
| | | | - Marlus Chorilli
- Department of Drugs and Medicine, School of Pharmaceutical Sciences, São Paulo State University, Araraquara, São Paulo, 14800-903, Brazil
| | - Raffaele Mezzenga
- Department of Health Sciences & Technology, ETH Zurich, Zurich, 8092, Switzerland.,Department of Materials, ETH Zurich, Zurich, 8093, Switzerland
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Chircov C, Bejenaru IT, Nicoară AI, Bîrcă AC, Oprea OC, Tihăuan B. Chitosan-Dextran-Glycerol Hydrogels Loaded with Iron Oxide Nanoparticles for Wound Dressing Applications. Pharmaceutics 2022; 14:pharmaceutics14122620. [PMID: 36559114 PMCID: PMC9784071 DOI: 10.3390/pharmaceutics14122620] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/23/2022] [Accepted: 11/25/2022] [Indexed: 11/29/2022] Open
Abstract
Natural polymers have shown tremendous potential towards the development of hydrogels with tissue regeneration properties. Among them, chitosan and dextran are polysaccharides widely applied in the wound dressing area owing to their mucoadhesiveness, biodegradability, hemostatic potential, and intrinsic antibacterial activity, while glycerol is a well-known biocompatible solvent extensively used in the manufacture of cosmetic, pharmaceutical, medical, and personal care products. In order to enhance the properties of natural polymer-based hydrogels, the focus has currently shifted towards the addition of nanomaterials with antibacterial and regenerative potential, i.e., iron oxide nanoparticles. Thus, the aim of the present study was to develop a series of chitosan-dextran-glycerol hydrogels loaded with iron oxide nanoparticles, either readily added or formed in situ. The physicochemical properties of the so obtained hydrogels demonstrated an improved dispersibility of the in situ formed magnetite nanoparticles, which further decreases the porosity and swelling ratio of the hydrogels but increases the antimicrobial properties. Additionally, the presence of glycerol enhances the cell viability but reduces the antimicrobial potential. In this context, the results proved promising biological and antimicrobial properties, thus confirming their potential as biomaterials for wound healing and regeneration.
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Affiliation(s)
- Cristina Chircov
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | | | - Adrian Ionuț Nicoară
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Correspondence:
| | - Alexandra Cătălina Bîrcă
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
| | - Ovidiu Cristian Oprea
- National Research Center for Micro and Nanomaterials, University Politehnica of Bucharest, 060042 Bucharest, Romania
- Department of Inorganic Chemistry, Physical Chemistry and Electrochemistry, University Politehnica of Bucharest, 1-7 Polizu St., 011061 Bucharest, Romania
| | - Bianca Tihăuan
- Research Institute of the University of Bucharest—ICUB, 91-95 Splaiul Independentei, 50567 Bucharest, Romania
- Research & Development for Advanced Biotechnologies and Medical Devices, SC Sanimed International Impex SRL, 087040 Călugăreni, Romania
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Pellis A, Guebitz GM, Nyanhongo GS. Chitosan: Sources, Processing and Modification Techniques. Gels 2022; 8:gels8070393. [PMID: 35877478 PMCID: PMC9322947 DOI: 10.3390/gels8070393] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/11/2022] [Accepted: 06/19/2022] [Indexed: 02/07/2023] Open
Abstract
Chitosan, a copolymer of glucosamine and N-acetyl glucosamine, is derived from chitin. Chitin is found in cell walls of crustaceans, fungi, insects and in some algae, microorganisms, and some invertebrate animals. Chitosan is emerging as a very important raw material for the synthesis of a wide range of products used for food, medical, pharmaceutical, health care, agriculture, industry, and environmental pollution protection. This review, in line with the focus of this special issue, provides the reader with (1) an overview on different sources of chitin, (2) advances in techniques used to extract chitin and converting it into chitosan, (3) the importance of the inherent characteristics of the chitosan from different sources that makes them suitable for specific applications and, finally, (4) briefly summarizes ways of tailoring chitosan for specific applications. The review also presents the influence of the degree of acetylation (DA) and degree of deacetylation (DDA), molecular weight (Mw) on the physicochemical and biological properties of chitosan, acid-base behavior, biodegradability, solubility, reactivity, among many other properties that determine processability and suitability for specific applications. This is intended to help guide researchers select the right chitosan raw material for their specific applications.
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Affiliation(s)
- Alessandro Pellis
- Department of Chemistry and Industrial Chemistry, University of Genova, Via Dodecaneso 31, 16146 Genova, Italy;
| | - Georg M. Guebitz
- Department of Agrobiotechnology, IFA-Tulln, Institute of Environmental Biotechnology, University of Natural Ressources and Life Sciences, 1180 Vienna, Austria;
| | - Gibson Stephen Nyanhongo
- Department of Agrobiotechnology, IFA-Tulln, Institute of Environmental Biotechnology, University of Natural Ressources and Life Sciences, 1180 Vienna, Austria;
- Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Johannesburg P.O. Box 17011, South Africa
- Correspondence:
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Multiple Roles of Chitosan in Mucosal Drug Delivery: An Updated Review. Mar Drugs 2022; 20:md20050335. [PMID: 35621986 PMCID: PMC9146108 DOI: 10.3390/md20050335] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 11/29/2022] Open
Abstract
Chitosan (CS) is a linear polysaccharide obtained by the deacetylation of chitin, which, after cellulose, is the second biopolymer most abundant in nature, being the primary component of the exoskeleton of crustaceans and insects. Since joining the pharmaceutical field, in the early 1990s, CS attracted great interest, which has constantly increased over the years, due to its several beneficial and favorable features, including large availability, biocompatibility, biodegradability, non-toxicity, simplicity of chemical modifications, mucoadhesion and permeation enhancer power, joined to its capability of forming films, hydrogels and micro- and nanoparticles. Moreover, its cationic character, which renders it unique among biodegradable polymers, is responsible for the ability of CS to strongly interact with different types of molecules and for its intrinsic antimicrobial, anti-inflammatory and hemostatic activities. However, its pH-dependent solubility and susceptibility to ions presence may represent serious drawbacks and require suitable strategies to be overcome. Presently, CS and its derivatives are widely investigated for a great variety of pharmaceutical applications, particularly in drug delivery. Among the alternative routes to overcome the problems related to the classic oral drug administration, the mucosal route is becoming the favorite non-invasive delivery pathway. This review aims to provide an updated overview of the applications of CS and its derivatives in novel formulations intended for different methods of mucosal drug delivery.
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