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Semwal J, Meera MS. Novel mode of kafirin modification using combination of enzyme and thermal treatment to expand its food application. Food Chem 2024; 460:140489. [PMID: 39047474 DOI: 10.1016/j.foodchem.2024.140489] [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: 08/17/2023] [Revised: 12/31/2023] [Accepted: 07/15/2024] [Indexed: 07/27/2024]
Abstract
Kafirin in sorghum inhibits starch digestion and exhibits antioxidant properties, however its potential in food industry remains unexplored. Therefore, the study was aimed to explore and improve the potential of kafirin as natural carbohydrate blocker using papain (6 NFU/mL) and/or infrared treatment (220 °C/3 min). Results indicated that the combined treatment, PIR (infrared + papain) is the most efficient treatment to modify kafirin. PIR generated a new ∼37 kDa high molecular weight moiety in kafirin with a crystal size of 157.44 Å. All samples showed superior antioxidant activity post-treatments, with PIR exhibiting highest scavenging activity from 31.09 to 82.97%, 15.09 to 42.82%, and 25.92 to 38.58% for DPPH, FRAP, and ABTS, respectively. PIR-modified kafirin limited malondialdehyde production, and increased α-amylase and α-glucosidase inhibition. Incorporation of 7.5% kafirin in corn starch increased resistant starch from 5.09 to 21.04% after cooking, which suggests potential of kafirin in development of diabetic-friendly food formulations.
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Affiliation(s)
- Jyoti Semwal
- Department of Grain Science and Technology, CSIR- Central Food Technological Research Institute, Mysore 570020, Karnataka, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India
| | - M S Meera
- Department of Grain Science and Technology, CSIR- Central Food Technological Research Institute, Mysore 570020, Karnataka, India; Academy of Scientific and Innovative Research, Ghaziabad 201002, India.
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2
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Verma R, Verma C, Gupta B, Mukhopadhyay S. Preparation and characterization of structural and antifouling properties of chitosan/polyethylene oxide membranes. Int J Biol Macromol 2024; 278:134693. [PMID: 39142485 DOI: 10.1016/j.ijbiomac.2024.134693] [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: 05/07/2024] [Revised: 07/29/2024] [Accepted: 08/10/2024] [Indexed: 08/16/2024]
Abstract
It aims to prepare the chitosan (CS) and polyethylene oxide (PEO) hydrogel membranes with different CS/PEO blend ratios (100:0, 95:5, 90:10, 80:20 and 70:30) via solvent casting. The physicochemical properties of these membranes were investigated using various characterization techniques: Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), differential scanning calorimetry (DSC), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X-ray (EDX), contact angle, and tensile testing. The interaction of PEO and chitosan was investigated by DSC in terms of freezing bound, freezing free, and non-freezing PEO fraction. The cross-sectional surface morphology of membranes displayed a smoother surface with increasing PEO content up to 20 %, beyond which nonhomogeneity on the surface was visible. The antifouling behavior of membranes was investigated by bacterial adherence study, which showed an enhanced antifouling nature of membranes with the increase in the PEO content. The peeling strength of the membranes was measured using a 90° angle peeling test, and it was found that 20 % and more PEO content promotes easy removal from the gelatin slab. In addition to this, live/ dead assay of the CS was performed to visualize the presence of live and dead bacteria on the surface. The CS/PEO blend with 20 % PEO content has properties makes it suitable for use as a protective layer on wound dressings to prevent bacterial growth. It's use in wound dressings has the potential to reduce the pain during the time of dressing removal and improve patient outcomes. The present investigation leads to the development of a CS hydrogel matrix which exhibits very interesting interaction with the PEO moiety along with its innovative feature of antifouling and antimicrobial nature.
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Affiliation(s)
- Rohini Verma
- Bioengineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Chetna Verma
- Bioengineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology, New Delhi 110016, India
| | - Bhuvanesh Gupta
- Bioengineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology, New Delhi 110016, India.
| | - Samrat Mukhopadhyay
- Bioengineering Laboratory, Department of Textile and Fibre Engineering, Indian Institute of Technology, New Delhi 110016, India.
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3
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Ganesan A, Rengarajan J. Green synthesis of chitosan nanoparticles using Cassia fistula leaf extract: evaluation of antimicrobial, antioxidant, antibiofilm, and cytotoxic activities. 3 Biotech 2024; 14:223. [PMID: 39247455 PMCID: PMC11379835 DOI: 10.1007/s13205-024-04073-9] [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: 06/15/2024] [Accepted: 08/28/2024] [Indexed: 09/10/2024] Open
Abstract
The emerging field of green synthesis within nanobiotechnology presents significant environmental and economic advantages compared to conventional methodologies. This study investigates the synthesis and application of chitosan nanoparticles (ChNPs) using Cassia fistula (CF) leaf extract as a sustainable, and bio-based approach. Characterization of CF-ChNPs confirmed effective bioconversion and also demonstrated significant antimicrobial activity. Notably, CF-ChNPs demonstrated a remarkable antimicrobial effect against Pseudomonas aeruginosa, with a zone of inhibition of 17 ± 0.2 mm surpassing the impact on other organisms tested. The CF-ChNPs exhibited an initial burst release of 28 ± 0.28% after 2 h, gradually achieving a controlled release of 76.3 ± 0.43% within 24 h. In addition, CF-ChNPs exhibited an antioxidant activity of 43.1 ± 0.48% and showed excellent antibiofilm activity against Staphylococcus aureus in comparison to other organisms. The cell viability assay results have confirmed that CF-ChNPs do not have any negative impact on the viability of L929 fibroblasts, further highlighting their potential as versatile nanomaterials for treating microbial infections and other therapeutic applications.
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Affiliation(s)
- Anusiya Ganesan
- Department of Biotechnology, School of Bioengineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRM IST), Chengalpattu District, Kattankulathur, Tamil Nadu 603 203 India
| | - Jaiganesh Rengarajan
- Department of Biotechnology, School of Bioengineering, Faculty of Engineering and Technology, SRM Institute of Science and Technology (SRM IST), Chengalpattu District, Kattankulathur, Tamil Nadu 603 203 India
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4
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Mondal A, Nongbri DL, Achariya K, Haque M, Aguan K, Bhattacharya A, Singha Roy A. A chitosan-α-naphthaldehyde hydrogel film containing pineapple leaf fibers for wound dressing applications. J Mater Chem B 2024. [PMID: 39344521 DOI: 10.1039/d4tb01318b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2024]
Abstract
In recent decades, polysaccharide-based hydrogels have gained significant attention due to their natural biocompatibility, biodegradability, and non-toxicity. The potential for using polysaccharides to synthesize hydrogels is due to their ability to support cell proliferation, which is important for practical applications, particularly in the biomedical field. In this study, we have synthesized a chitosan-α-naphthal hydrogel film using a cost-effective one-step synthesis approach. The prepared hydrogel film exhibited high encapsulation efficiency for antibacterial drugs such as ciprofloxacin and lomefloxacin, with the ability to release the antibiotics in a controlled manner over an extended period and prevent long-term bacterial infections. Moreover, the Korsmeyer and Peppas power law, based on Fickian diffusion, was employed to model the entire complex drug release process and predict the drug release behavior. The hydrogel film also shows pH-induced swelling ability due to the presence of an imine bond in the hydrogel network, which is degradable at acidic pH. The incorporated therapeutic agents having antibacterial activity were effective against Gram-negative (Escherichia coli DH5α) and Gram-positive (Staphylococcus aureus subsp. aureus) bacterial strains. A wound dressing material should possess mechanical strength, but the prepared hydrogel film has low mechanical strength. To increase the mechanical strength, we have infused pineapple leaf fibers (PLFs) in the film network, resulting in a mechanical strength of 1.12 ± 0.89 MPa. In addition to its mechanical strength, significant cell viability against human embryonic kidney (HEK-293) cells was observed from in vitro cell culture experiments for this PLF-hydrogel film. As a result, the prepared therapeutic agent-loaded hydrogel film under study meets the requirements to be considered for use as a wound dressing material.
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Affiliation(s)
- Amarjyoti Mondal
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong-793003, India.
| | | | - Kusumita Achariya
- Department of Microbiology, School of Life Science and Biotechnology, Adamas University, Kolkata-700126, India
| | - Mahabul Haque
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong-793003, India.
| | - Kripamoy Aguan
- Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong-793022, India
| | - Arijit Bhattacharya
- Department of Microbiology, School of Life Science and Biotechnology, Adamas University, Kolkata-700126, India
| | - Atanu Singha Roy
- Department of Chemical and Biological Sciences, National Institute of Technology Meghalaya, Shillong-793003, India.
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5
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Luong HVT, Le PP, Thieu QQV, Nguyen VNH, Nguyen TNY. Alginate functionalized sugarcane cellulose-based beads to improve methylene blue adsorption from aqueous solution. Heliyon 2024; 10:e37860. [PMID: 39315126 PMCID: PMC11417539 DOI: 10.1016/j.heliyon.2024.e37860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 09/06/2024] [Accepted: 09/11/2024] [Indexed: 09/25/2024] Open
Abstract
The study was carried out with the goal of synthesizing composite bead of cellulose, chitosan functionalized by sodium alginate using as an efficient and applicable adsorbent for methylene blue removal. Fabricating parameters of the material synthesis process like cellulose mass, sodium hydroxide concentration, immersing time and sodium alginate concentration were assessed in detail. The dye adsorption performance in water under the influence of pH, contact time, dye initial concentration, the material mass, shaking speed, temperature was also thoroughly evaluated. The results of advanced analyses showed that the beads were successfully synthesized with a rough surface and mesoporous structure. The adsorption isotherm and adsorption kinetics of dye adsorption process exhibited that the process was consistent with the Freundlich adsorption isotherm and the pseudo-second-order kinetic model, indicating a favorable physical adsorption process with multilayer of the dye on the adsorbent surface. The intra-particle diffusion model showed the strong dye adsorption by the beads occurred during the first two and half hours. The adsorbent could maintain its adsorption performance of 86 % for three times of regeneration. Finally, this study provided a recyclable and effective adsorbent for dyes separation from water.
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Affiliation(s)
- Huynh Vu Thanh Luong
- Applied Chemical Engineering Lab, Can Tho University, Can Tho, 94000, Viet Nam
- Faculty of Chemical Engineering, Can Tho University, Can Tho, 94000, Viet Nam
| | - Phuoc Pha Le
- Applied Chemical Engineering Lab, Can Tho University, Can Tho, 94000, Viet Nam
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Su C, Jiang C, Lin J, Liu J, Zhan H, Che S, Chen X, Feng C. Optimization of preparation conditions for β-chitosan derived from diatom biomanufacturing using response surface methodology. Int J Biol Macromol 2024; 279:135233. [PMID: 39251005 DOI: 10.1016/j.ijbiomac.2024.135233] [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: 04/29/2024] [Revised: 08/28/2024] [Accepted: 08/29/2024] [Indexed: 09/11/2024]
Abstract
Chitosan is a polymeric polysaccharide with widely application. At present, commercialized chitosan obtained by deacetylating chitin with acid-alkali method. The homogeneity of the molecular weight of chitosan is difficult to adjust due to the low homogeneity of chitosan itself and the degradation effect of the extraction process. And the single source of raw material has limited the further development of chitosan. In this study, diatoms were used as the source of chitosan extraction through alkalization freeze-thaw method, and response surface methodology was also used to optimize the best preparation conditions of diatom chitosan. The extracted chitosan from diatom was β-type chitosan with low molecular weight, great homogeneity. Diatom chitosan was able to reduce blood loss and clotting time >30 % in vivo experiment compared to control. The hemolysis rate of diatom chitosan was lower than 1 %, and the survival rate was higher than 95 % when co-cultured with L929 cells. Diatom chitosan with 0.005 % could inhibit E. coli and S. aureus by >90 %. Considering the large-scale cultivation properties of diatom, the extraction of diatom chitosan based on alkalization freeze-thaw method will provide a viable solution for obtaining β-chitosan with homogeneity on a large scale.
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Affiliation(s)
- Chang Su
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China
| | - Changqing Jiang
- Qingdao Municipal Hospital, 5# Donghai Middle Road, Qingdao 266000, Shandong Province, China
| | - Jiawen Lin
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China
| | - Jinfeng Liu
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China; Qingdao Women and Children's Hospital, 217# Liaoyang West Road, Qingdao 266034, Shandong Province, China
| | - Hao Zhan
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China
| | - Shengting Che
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China
| | - Xiguang Chen
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China; Sanya Oceanographic Institute, Ocean University of China, Yonyou Industrial Park, Yazhou Bay Science & Technology City, Sanya 572024, Hainan Province, China; Laoshan Laboratory, 1# Wenhai Road, Qingdao 266000, Shandong Province, China
| | - Chao Feng
- College of Marine Life Science, Ocean University of China, 5# Yushan Road, Qingdao 266003, Shandong Province, China; Sanya Oceanographic Institute, Ocean University of China, Yonyou Industrial Park, Yazhou Bay Science & Technology City, Sanya 572024, Hainan Province, China.
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Schröder V, Gherghel D, Apetroaei MR, Gîjiu CL, Isopescu R, Dinculescu D, Apetroaei MM, Enache LE, Mihai CT, Rău I, Vochița G. α-Chitosan and β-Oligochitosan Mixtures-Based Formula for In Vitro Assessment of Melanocyte Cells Response. Int J Mol Sci 2024; 25:6768. [PMID: 38928474 PMCID: PMC11204147 DOI: 10.3390/ijms25126768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/14/2024] [Accepted: 06/17/2024] [Indexed: 06/28/2024] Open
Abstract
Chitosan is a natural polymer with numerous biomedical applications. The cellular activity of chitosan has been studied in various types of cancer, including melanoma, and indicates that these molecules can open new perspectives on antiproliferative action and anticancer therapy. This study analyzes how different chitosan conformations, such as α-chitosan (CH) or β-oligochitosan (CO), with various degrees of deacetylation (DDA) and molar mass (MM), both in different concentrations and in CH-CO mixtures, influence the cellular processes of SK-MEL-28 melanocytes, to estimate the reactivity of these cells to the applied treatments. The in vitro evaluation was carried out, aiming at the cellular metabolism (MTT assay), cellular morphology, and chitinase-like glycoprotein YKL-40 expression. The in vitro effect of the CH-CO mixture application on melanocytes is obvious at low concentrations of α-chitosan/β-oligochitosan (1:2 ratio), with the cell's response supporting the hypothesis that β-oligo-chitosan amplifies the effect. This oligochitosan mixture, favored by the β conformation and its small size, penetrates faster into the cells, being more reactive when interacting with some cellular components. Morphological effects expressed by the loss of cell adhesion and the depletion of YKL-40 synthesis are significant responses of melanocytes. β-oligochitosan (1.5 kDa) induces an extension of cytophysiological effects and limits the cell viability compared to α-chitosan (400-900 kDa). Statistical analysis using multivariate techniques showed differences between the CH samples and CH-CO mixtures.
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Affiliation(s)
- Verginica Schröder
- Departament of Cellular and Molecular Biology, Faculty of Pharmacy, Ovidius University of Constanta, 6 Capt. Aviator Al. Șerbănescu Street, Campus C, 900470 Constanta, Romania;
| | - Daniela Gherghel
- Institute of Biological Research Iasi, Branch of NIRDBS—National Institute of Research and Development of Biological Sciences Bucharest, 47 Lascar Catargi, 700107 Iasi, Romania;
| | - Manuela Rossemary Apetroaei
- Department of Marine Electric and Electronic Engineering, Faculty of Marine Engineering, Mircea cel Batran Naval Academy, 1 Fulgerului Street, 900218 Constanta, Romania;
| | - Cristiana Luminița Gîjiu
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania; (C.L.G.); (R.I.); (L.E.E.); (I.R.)
| | - Raluca Isopescu
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania; (C.L.G.); (R.I.); (L.E.E.); (I.R.)
| | - Daniel Dinculescu
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania; (C.L.G.); (R.I.); (L.E.E.); (I.R.)
| | - Miruna-Maria Apetroaei
- Faculty of Pharmacy, Carol Davila University of Medicine and Pharmacy, 6 Traian Vuia Street, 020956 Bucharest, Romania;
| | - Laura Elena Enache
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania; (C.L.G.); (R.I.); (L.E.E.); (I.R.)
| | | | - Ileana Rău
- Faculty of Chemical Engineering and Biotechnologies, National University of Science and Technology POLITEHNICA Bucharest, 011061 Bucharest, Romania; (C.L.G.); (R.I.); (L.E.E.); (I.R.)
| | - Gabriela Vochița
- Institute of Biological Research Iasi, Branch of NIRDBS—National Institute of Research and Development of Biological Sciences Bucharest, 47 Lascar Catargi, 700107 Iasi, Romania;
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Sathiyaseelan A, Zhang X, Han K, Wang MH. Enhancing antifungal and biocompatible efficacy of undecanoic acid through incorporation with chitosan-based nanoemulsion. Int J Biol Macromol 2024; 267:131328. [PMID: 38574901 DOI: 10.1016/j.ijbiomac.2024.131328] [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: 01/17/2024] [Revised: 03/18/2024] [Accepted: 03/31/2024] [Indexed: 04/06/2024]
Abstract
The management of invasive fungal infections in humans poses significant challenges due to the intricate nature of the treatment, which is both arduous and costly, necessitating routine diagnostic procedures. Consequently, this investigation aimed to formulate a chitosan-based nanoemulsion (CS NEMs) incorporating the antifungal agent undecanoic acid (UDA), characterizing these NEMs and assessing their antifungal efficacy against both filamentous and non-filamentous fungal pathogens. The CS-based UDA NEMs were synthesized by introducing the surfactant Triton X-100 and the stabilizer glycerol. Nanoparticle tracking analysis (NTA) and SEM demonstrated the CS-UDA NEMs with an average size of 145 nm and 164.5 ± 24 nm, respectively. The successful formation of CS-UDA NEMs was verified through FTIR and XRD. CS-UDA NEMs exhibited exceptional inhibition against Aspergillus flavus, Aspergillus fumigatus, Aspergillus niger, and Candida albicans with MFC of 500, 500, 250 and 250 μg/mL, respectively. Additionally, CS-UDA NEMs displayed comparatively lower antioxidant activity as determined by DPPH and ABTS radical scavenging assays. Importantly, CS-UDA NEMs demonstrated no cytotoxic effects on NIH3T3 cells even at higher concentration (1000 μg/mL), as confirmed by cell viability and fluorescent staining assays. In conclusion, this study suggests that the developed CS-UDA NEMs hold promise as potent antifungal agents with diverse potential applications.
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Affiliation(s)
- Anbazhagan Sathiyaseelan
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Xin Zhang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Kiseok Han
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Myeong-Hyeon Wang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea.
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9
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Jha R, Harlow H, Benamara M, Mayanovic RA. On the Structural and Molecular Properties of PEO and PEO-PPG Functionalized Chitosan Nanoparticles for Drug Delivery. Bioengineering (Basel) 2024; 11:372. [PMID: 38671793 PMCID: PMC11048302 DOI: 10.3390/bioengineering11040372] [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: 02/02/2024] [Revised: 04/07/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
Chitosan nanoparticles (CS-NPs) are currently under investigation for a wide range of applications in nanomedicine. We investigated the structural, morphological, and molecular properties of CS-NPs synthesized via ionic gelation and designed specifically for drug delivery. The CS-NPs were prepared at concentrations ranging from 0.25 to 1.0% w/v. The 1.0% w/v CS-NPs were also functionalized with polyethylene oxide (PEO) alone and with a diblock copolymer of PEO and polypropylene glycol (PPG). The average nanoparticle size determined from TEM imaging is in the 11.3 to 14.8 nm range. The XRD and TEM analyses reveal a semi-crystalline structure with a degree of crystallinity dependent upon the nature of CS-NP functionalization. Functionalizing with PEO had no effect, whereas functionalizing with PEO-PPG resulted in a significant increase in the crystallinity of the 1.0% w/v CS-NPs. Additionally, the CS/TPP concentration (CS:TPP fixed at a 1:1 ratio) did not impact the degree of crystallinity of the CS-NPs. FTIR analysis confirmed the incorporation of TPP with CS and an increase in hydrogen bonding in more crystalline CS-NPs.
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Affiliation(s)
- Rejeena Jha
- Department of Physics, Astronomy, and Materials Science, Missouri State University, Springfield, MO 65804, USA; (R.J.)
| | - Hyrum Harlow
- Department of Physics, Astronomy, and Materials Science, Missouri State University, Springfield, MO 65804, USA; (R.J.)
| | - Mourad Benamara
- University of Arkansas Nano-Bio Materials Characterization Facility, University of Arkansas, Fayetteville, AR 72701, USA
| | - Robert A. Mayanovic
- Department of Physics, Astronomy, and Materials Science, Missouri State University, Springfield, MO 65804, USA; (R.J.)
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Elsayed Mahmoud D, Billa N. Physicochemical modifications in microwave-irradiated chitosan: biopharmaceutical and medical applications. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2024; 35:898-915. [PMID: 38284331 DOI: 10.1080/09205063.2024.2306695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 01/11/2024] [Indexed: 01/30/2024]
Abstract
Biopharmaceutical and biomedical applications of chitosan has evolved exponentially in the past decade, owing to its unique physicochemical properties. However, further applications can be garnered from modified chitosan, specifically, depolymerized chitosan, with potentially useful applications in drug delivery or biomedicine. The use of microwave irradiation in depolymerization of chitosan appears to be more consequential than other methods, and results in modification of key physicochemical properties of chitosan, including molecular weight, viscosity and degree of deacetylation. In-depth review of such microwave-depolymerized chitosan and subsequent potential biopharmaceutical or biomedical applications has not been presented before. Herein, we present a detailed review of key physicochemical changes in chitosan following various depolymerization approaches, with focus on microwave irradiation and how these changes impact relevant biopharmaceutical or biomedical applications.
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Affiliation(s)
- Doaa Elsayed Mahmoud
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, Doha, Qatar
| | - Nashiru Billa
- Department of Pharmaceutical Sciences, College of Pharmacy, QU Health, Qatar University, Doha, Qatar
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11
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Ragab HM, Diab NS, Obeidat ST, Alghamdi AM, Khaled AM, Farea MO, Morsi MA. Improving the optical, thermal, mechanical, electrical properties and antibacterial activity of PVA-chitosan by biosynthesized Ag nanoparticles: Eco-friendly nanocomposites for food packaging applications. Int J Biol Macromol 2024; 264:130668. [PMID: 38453109 DOI: 10.1016/j.ijbiomac.2024.130668] [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: 10/16/2023] [Revised: 02/24/2024] [Accepted: 03/04/2024] [Indexed: 03/09/2024]
Abstract
In this study, nanocomposite films were produced by blending polyvinyl alcohol (PVA) and chitosan (Cs) polymers with 70 % PVA and 30 % Cs, incorporating silver nanoparticles (Ag NPs) via a solution-casting method. The research aims to investigate the impact of the biosynthesized Ag NPs by Chenopodium murale leaf extract on optical, morphological, mechanical, thermal, electrical, and antibacterial properties. XRD analysis showed a decrease in crystallinity degree with Ag NPs addition. TEM revealed Ag NPs in cubic and spherical shapes with an average size of 23.4 nm. SEM and AFM indicated surface morphology changes. FT-IR spectra showed interaction between Ag ions and the blend. The energy gap decreased with increasing Ag NPs concentration. TGA exhibited enhanced thermal stability. Mechanical properties improved significantly. AC electrical conductivity and dielectric parameters were studied. Antibacterial activity against Gram-positive and Gram-negative bacteria was observed. Overall, PVA/Cs-Ag NPs films show promise for food packaging and optoelectronic applications.
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Affiliation(s)
- H M Ragab
- Basic Sciences Department, Deanship of Preparatory Year, University of Ha'il, Hail, Saudi Arabia.
| | - N S Diab
- Basic Sciences Department, Deanship of Preparatory Year, University of Ha'il, Hail, Saudi Arabia
| | - Sofian Talal Obeidat
- Basic Sciences Department, Deanship of Preparatory Year, University of Ha'il, Hail, Saudi Arabia
| | - Azzah M Alghamdi
- University of Jeddah, College of Science, Department of Physical Sciences, Jeddah, Saudi Arabia
| | - Azza M Khaled
- Basic Sciences Department, Deanship of Preparatory Year, University of Ha'il, Hail, Saudi Arabia; National Institute of Oceanography and Fisheries, Cairo, Egypt
| | - M O Farea
- Department of Physics, Faculty of Sciences, Ibb University, Ibb, Yemen
| | - M A Morsi
- Physics Department, Faculty of Science, Taibah University, Al-Ula, Medina, Saudi Arabia; Mathematical and Natural Sciences Department, Faculty of Engineering, Egyptian Russian University, Badr City, Cairo 11829, Egypt
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Díaz Vergara LI, Arata Badano J, Aminahuel CA, Vanden Braber NL, Rossi YE, Pereyra CM, Cavaglieri LR, Montenegro MA. Chitosan-glucose derivative as effective wall material for probiotic yeasts microencapsulation. Int J Biol Macromol 2023; 253:127167. [PMID: 37793535 DOI: 10.1016/j.ijbiomac.2023.127167] [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: 07/13/2023] [Revised: 08/30/2023] [Accepted: 09/28/2023] [Indexed: 10/06/2023]
Abstract
A chitosan-glucose derivative (ChG) with lower antimicrobial activity against whey native probiotic yeast K. marxianus VM004 was synthesized by the Maillard reaction. The ChG derivative was characterized by FT-IR, 1H NMR, and SLS to determine the structure, deacetylation degree (DD), and molecular weight (Mw). In addition, we evaluated the antioxidant, cytotoxic, and antimicrobial activities of ChG. ChG was then used for microencapsulation of K. marxianus VM004 by spray drying. The microcapsules were characterized by evaluating their encapsulation yield, encapsulation efficiency, morphology, tolerance to the gastrointestinal tract, and viability during storage. The results indicated that a non-cytotoxic product with lower MW and DD and higher antioxidant activity than native chitosan was obtained by the Maillard reaction. The yeast ChG microcapsules exhibited an encapsulation efficiency >57 %, improved resistance to gastrointestinal conditions, and enhanced stability during storage. These results demonstrate that ChG may be a promising wall material for the microencapsulation of probiotic yeasts.
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Affiliation(s)
- Ladislao I Díaz Vergara
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina
| | - Joaquín Arata Badano
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina
| | - Carla A Aminahuel
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina
| | - Noelia L Vanden Braber
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina
| | - Yanina E Rossi
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina
| | - Carina M Pereyra
- Departamento de Microbiología e Inmunología, Universidad Nacional de Río Cuarto, Ruta Nacional 36 KM 601, Río Cuarto, Córdoba, Argentina
| | - Lilia R Cavaglieri
- Departamento de Microbiología e Inmunología, Universidad Nacional de Río Cuarto, Ruta Nacional 36 KM 601, Río Cuarto, Córdoba, Argentina
| | - Mariana A Montenegro
- Instituto Multidisciplinario de Investigación y Transferencia Agroalimentaria y Biotecnológica (IMITAB), Universidad Nacional de Villa María, Campus Universitario, Av. Arturo Jauretche 1555, Villa María, Córdoba, Argentina.
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13
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Ingrungruengluet P, Wang D, Li X, Yang C, Waiprib Y, Li C. Preparation and Primary Bioactivity Evaluation of Novel Water-Soluble Curcumin-Loaded Polymeric Micelles Fabricated with Chitooligosaccharides and Pluronic F-68. Pharmaceutics 2023; 15:2497. [PMID: 37896257 PMCID: PMC10609826 DOI: 10.3390/pharmaceutics15102497] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 10/11/2023] [Accepted: 10/17/2023] [Indexed: 10/29/2023] Open
Abstract
Curcumin (CU) is a bioactive compound extracted from turmeric and has various advantages. However, the benefit of CU is limited by its low water solubility (11 ng/mL). This research aimed to fabricate a water-soluble CU nano-formulation with chitooligosaccharides (COS) and pluronic F-68 (PF) utilizing the polymeric micelle method. The optimized curcumin-loaded chitooligosaccharides/pluronic F-68 micelles (COSPFCU) exhibited high encapsulation efficiency and loading capacity (75.57 ± 2.35% and 10.32 ± 0.59%, respectively). The hydrodynamic diameter of lyophilized COSPFCU was 73.89 ± 11.69 nm with a polydispersity index below 0.3. The COSPFCU could be completely redispersed in water and showed high DPPH scavenging ability. Meanwhile, COSPFCU could significantly reduce the cytotoxicity of the RAW 264.7 cells compared to native CU. Furthermore, COSPFCU improved the inhibition of NO release activity at 72.83 ± 2.37% but 33.20 ± 3.41% for the CU, with a low cytotoxicity concentration in the RAW 264.7 cells.
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Affiliation(s)
- Pattarachat Ingrungruengluet
- Shandong Key Laboratory of Glycoscience and Glycotechnology, Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China (X.L.); (C.Y.)
- Department of Fishery Products, Faculty of Fisheries, Kasetsart University, Bangkok 10900, Thailand
| | - Dingfu Wang
- Shandong Key Laboratory of Glycoscience and Glycotechnology, Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China (X.L.); (C.Y.)
| | - Xin Li
- Shandong Key Laboratory of Glycoscience and Glycotechnology, Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China (X.L.); (C.Y.)
| | - Cheng Yang
- Shandong Key Laboratory of Glycoscience and Glycotechnology, Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China (X.L.); (C.Y.)
| | - Yaowapha Waiprib
- Department of Fishery Products, Faculty of Fisheries, Kasetsart University, Bangkok 10900, Thailand
- Center for Advanced Studies for Agriculture and Food (CASAF), Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand
| | - Chunxia Li
- Shandong Key Laboratory of Glycoscience and Glycotechnology, Key Laboratory of Marine Drugs of Ministry of Education, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China (X.L.); (C.Y.)
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14
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Cocean G, Cocean A, Garofalide S, Pelin V, Munteanu BS, Pricop DA, Motrescu I, Dimitriu DG, Cocean I, Gurlui S. Dual-Pulsed Laser Ablation of Oyster Shell Producing Novel Thin Layers Deposed to Saccharomyces cerevisiae. Polymers (Basel) 2023; 15:3953. [PMID: 37836002 PMCID: PMC10575290 DOI: 10.3390/polym15193953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 09/26/2023] [Accepted: 09/27/2023] [Indexed: 10/15/2023] Open
Abstract
Dual-pulsed (DPL) laser deposition using oyster shells as targets was studied in order to find out if this method can replace the use of high-power pulsed lasers. Aspects related to changes in the morphological structure of the thin layer but also to the chemical composition of the obtained thin layer were analyzed and compared with the target as well as with the thin layers obtained with a higher power pulsed laser in a single-pulsed (SPL) regime. Orthorhombic structures were noticed with Scanning Electron Microscopy for the thin film obtained in DPL mode compared to the irregular particles obtained in SPL mode. The deacetylation process during ablation was evidenced by Fourier Transform Infrared spectroscopy, resulting in chitosan-based thin films. The effect of the obtained thin films of chitosan on the cells of baker's yeast (Saccharomyces cerevisiae) was studied. Restoration of the yeast paste into initial yeast was noticed mainly when the hemp fabric was used as support for the coating with yeas which was after that coated with chitosan thin film produced by DPL method.
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Affiliation(s)
- Georgiana Cocean
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
- Rehabilitation Hospital Borsa, 1 Floare de Colt Street, 435200 Borsa, Romania
| | - Alexandru Cocean
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
- Laboratory of Applied Meteorology and Climatology, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, A Building, Physics, 11 Carol I, 700506 Iasi, Romania
| | - Silvia Garofalide
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
- Laboratory of Applied Meteorology and Climatology, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, A Building, Physics, 11 Carol I, 700506 Iasi, Romania
| | - Vasile Pelin
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
- Laboratory of Applied Meteorology and Climatology, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, A Building, Physics, 11 Carol I, 700506 Iasi, Romania
| | - Bogdanel Silvestru Munteanu
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
| | - Daniela Angelica Pricop
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
- Laboratory of Astronomy and Astrophysics, Research Center with Integrated Techniques for Atmospheric Aerosol Investigation in Romania (RECENT AIR), Alexandru Ioan Cuza University of Iasi, Astronomical Observatory, 11 Carol I, 700506 Iasi, Romania
| | - Iuliana Motrescu
- Sciences Department & Research Institute for Agriculture and Environment, Iasi University of Life Sciences, 3 Sadoveanu Alley, 700490 Iasi, Romania;
| | - Dan Gheorghe Dimitriu
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
| | - Iuliana Cocean
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
| | - Silviu Gurlui
- Atmosphere Optics, Spectroscopy and Laser Laboratory (LOASL), Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Bld., 700506 Iasi, Romania; (G.C.); (S.G.); (V.P.); (B.S.M.); (D.A.P.); (D.G.D.)
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15
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Zacaron TM, Silva MLSE, Costa MP, Silva DME, Silva AC, Apolônio ACM, Fabri RL, Pittella F, Rocha HVA, Tavares GD. Advancements in Chitosan-Based Nanoparticles for Pulmonary Drug Delivery. Polymers (Basel) 2023; 15:3849. [PMID: 37765701 PMCID: PMC10536410 DOI: 10.3390/polym15183849] [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: 08/11/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
The evolution of respiratory diseases represents a considerable public health challenge, as they are among the leading causes of death worldwide. In this sense, in addition to the high prevalence of diseases such as asthma, chronic obstructive pulmonary disease, pneumonia, cystic fibrosis, and lung cancer, emerging respiratory diseases, particularly those caused by members of the coronavirus family, have contributed to a significant number of deaths on a global scale over the last two decades. Therefore, several studies have been conducted to optimize the efficacy of treatments against these diseases, focusing on pulmonary drug delivery using nanomedicine. Thus, the development of nanocarriers has emerged as a promising alternative to overcome the limitations of conventional therapy, by increasing drug bioavailability at the target site and reducing unwanted side effects. In this context, nanoparticles composed of chitosan (CS) show advantages over other nanocarriers because chitosan possesses intrinsic biological properties, such as anti-inflammatory, antimicrobial, and mucoadhesive capacity. Moreover, CS nanoparticles have the potential to enhance drug stability, prolong the duration of action, improve drug targeting, control drug release, optimize dissolution of poorly soluble drugs, and increase cell membrane permeability of hydrophobic drugs. These properties could optimize the performance of the drug after its pulmonary administration. Therefore, this review aims to discuss the potential of chitosan nanoparticles for pulmonary drug delivery, highlighting how their biological properties can improve the treatment of pulmonary diseases, including their synergistic action with the encapsulated drug.
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Affiliation(s)
- Thiago Medeiros Zacaron
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
| | | | - Mirsiane Pascoal Costa
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
| | - Dominique Mesquita e Silva
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
| | - Allana Carvalho Silva
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
| | - Ana Carolina Morais Apolônio
- Postgraduate Program in Dentistry, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil;
| | - Rodrigo Luiz Fabri
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
| | - Frederico Pittella
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
- Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil;
| | - Helvécio Vinícius Antunes Rocha
- Laboratory of Micro and Nanotechnology—Farmanguinhos, FIOCRUZ—Fundação Oswaldo Cruz, Rio de Janeiro 21040-361, Rio de Janeiro, Brazil;
| | - Guilherme Diniz Tavares
- Postgraduate Program in Pharmaceutical Science, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil; (T.M.Z.); (M.P.C.); (D.M.e.S.); (A.C.S.); (R.L.F.); (F.P.)
- Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora 36036-900, Minas Gerais, Brazil;
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Muchtaridi M, Suryani AI, Wathoni N, Herdiana Y, Mohammed AFA, Gazzali AM, Lesmana R, Joni IM. Chitosan/Alginate Polymeric Nanoparticle-Loaded α-Mangostin: Characterization, Cytotoxicity, and In Vivo Evaluation against Breast Cancer Cells. Polymers (Basel) 2023; 15:3658. [PMID: 37765512 PMCID: PMC10538075 DOI: 10.3390/polym15183658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/21/2023] [Accepted: 08/27/2023] [Indexed: 09/29/2023] Open
Abstract
α-mangostin (Amg), a compound isolated from the mangosteen rind (Garcinia mangostana, L.), has demonstrated promising anticancer activity. However, its low solubility and selectivity against cancer cells limit its efficacy. To address this issue, researchers have developed chitosan/alginate polymeric nanoparticles (NANO-AMCAL) to enhance the effectiveness of Amg. In vitro studies have demonstrated that NANO-AMCAL is highly active against breast cancer cells. Therefore, an in vivo study was conducted to evaluate the efficacy of NANO-AMCAL in treating breast cancer in Wistar rats (Rattus norvegicus) and determine the effective dose. The rats were divided into seven treatment groups, including positive control, negative control, pure Amg, and NANO-AMCAL 5 mg, 10 mg, and 20 mg. The rats were injected subcutaneously with a carcinogenic agent, 7,12-dimethylbenz(a)anthracene (DMBA) and were evaluated for weight and tumor volume every three days during treatment. Surgery was performed on day 14, and histopathological studies were carried out on breast and lung cancer tissues. The results showed that NANO-AMCAL significantly enhanced the anticancer activity of Amg in treating breast cancer in Wistar rats. NANO-AMCAL containing 0.33 mg of Amg had a healing effect three times better than 20 mg pure Amg and was comparable to tamoxifen. The effective dose of NANO-AMCAL for anti-breast cancer treatment in Wistar rats was found to be 20 mg, which exhibited a good healing response, and the tumor volume continued to decrease up to 17.43% on the 14th day. Furthermore, histopathological tests showed tissue repair and no metastases. These findings suggest that NANO-AMCAL may be a promising therapeutic option for breast cancer treatment.
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Affiliation(s)
- Muchtaridi Muchtaridi
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia;
- Functional Nano Powder University Center of Excellence (FiNder U CoE), Universitas Padjadjaran, Jalan Raya Bandung-Sumedang Km 21, Jatinangor 45363, Indonesia
- Research Collaboration Centre for Radiopharmaceuticals Theranostic, National Research and Innovation Agency (BRIN), Jakarta 10340, Indonesia
| | - Ade Irma Suryani
- Department of Pharmaceutical Analysis and Medicinal Chemistry, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia;
| | - Nasrul Wathoni
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia; (N.W.); (Y.H.)
| | - Yedi Herdiana
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Universitas Padjadjaran, Sumedang 45363, Indonesia; (N.W.); (Y.H.)
| | | | - Amirah Mohd Gazzali
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, Gelugor 11800, Penang, Malaysia;
| | - Ronny Lesmana
- Physiology Division, Department of Anatomy, Physiology and Biology Cell, Faculty of Medicine, Universitas Padjadjaran, Sumedang 45363, Indonesia;
| | - I. Made Joni
- Functional Nano Powder University Center of Excellence (FiNder U CoE), Universitas Padjadjaran, Jalan Raya Bandung-Sumedang Km 21, Jatinangor 45363, Indonesia
- Departement of Physics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang 45363, Indonesia
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Jabrail FH, Mutlaq MS, Al-Ojar RK. Studies on Agrochemical Controlled Release Behavior of Copolymer Hydrogel with PVA Blends of Natural Polymers and Their Water-Retention Capabilities in Agricultural Soil. Polymers (Basel) 2023; 15:3545. [PMID: 37688171 PMCID: PMC10490384 DOI: 10.3390/polym15173545] [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: 06/29/2023] [Revised: 08/05/2023] [Accepted: 08/14/2023] [Indexed: 09/10/2023] Open
Abstract
Agricultural technical development relies exclusively on the effective delivery of agrochemicals and water to plants and on reducing the harmful effects of agrochemicals on useful organisms in the soil. In this study, super-absorbent hydrogels were prepared in the form of microspheres using gum Arabic (GA), which was copolymerized once with chitosan (CS) and once with poly (vinyl alcohol) (PVA). To impart mechanical strength to the hydrogel microspheres, a covalent cross-linker (N,N'-methylenebisacrylamide (MBA)) was used for the PVA/GA hydrogel, and an ionic cross-linker (sodium hexametaphosphate (SHMP)) was used for the CS/GA hydrogel. The prepared PVA/GA-CH and CS/GA-PH hydrogel microspheres showed different degrees of swelling (DSs) in the following solution media: deionized water (DW), river water (RW), and buffered solutions (pH 4; pH 9). The PVA/GA-CH hydrogel microspheres showed a maximum DS of 84 g/g in the RW, while the CS/GA-PH hydrogel microspheres showed a maximum DS of 63 g/g in the buffered solution at a pH 9. The water-retention capabilities of the hydrogels were studied using a mixture of 0.5% (w/w) hydrogel microspheres in agricultural soil; the composite showed an additional 20 days of water retention in comparison with a control sample consisting of soil alone. The hydrogels were loaded with urea, which is an important fertilizer in the field of agriculture. The PVA/GA-CH hydrogel microspheres showed a maximum loading percentage (Lmax%) of 89% (w/w), while the CS/GA-PH hydrogel microspheres showed an Lmax% = 79.75% (w/w) for urea. The urea-release behaviors of the hydrogel microspheres were studied under different release media and temperature conditions. In practice, the PVA/GA-CH hydrogel microspheres showed a better release profile in the RW at 10 °C, while the CS/GA-PH hydrogel microspheres showed a more controlled release in media at a pH 9 and at 30 °C. The urea-loaded microspheres, aside from those following the release, were characterized via FTIR and SEM. In contrast, virgin microspheres were characterized using XRD,1H NMR, (TGA and DSC), and the maximum degree of swelling, in addition to being subjected to SEM and FTIR analyses.
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Affiliation(s)
- Fawzi Habeeb Jabrail
- Polymer Research Laboratory, Department of Chemistry, College of Science, University of Mosul, Mosul 41002, Iraq;
| | - Maysam Salih Mutlaq
- Polymer Research Laboratory, Department of Chemistry, College of Science, University of Mosul, Mosul 41002, Iraq;
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Gothwal A, Lamptey RNL, Trivedi R, Chaulagain B, Singh J. Non-Invasive Intranasal Delivery of pApoE2: Effect of Multiple Dosing on the ApoE2 Expression in Mice Brain. Int J Mol Sci 2023; 24:13019. [PMID: 37629200 PMCID: PMC10456017 DOI: 10.3390/ijms241613019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/16/2023] [Accepted: 08/19/2023] [Indexed: 08/27/2023] Open
Abstract
Chitosan-based polymeric micelles are promising non-viral nanocarriers for safe and targeted gene delivery. Multi-functionalized chitosan polymeric micelles were prepared by grafting fatty acid, cell-penetrating peptide, and mannose on the chitosan backbone. The polymeric micelles were subjected to surface morphology and surface topography using scanning electron microscopy and atomic force microscopy, respectively. The hemotoxic profile of the prepared polymeric micelles was established against erythrocytes and was found to be <5% hemotoxic up to the concentration of 600 µg/mL. In vitro ApoE2 expression in primary astrocytes and neurons was analyzed. Multi-functionalized polymeric micelles produced greater (p < 0.05) transfection in astrocytes and neurons in comparison to mono-functionalized micelles. Intranasal administration of polymeric micelles/pApoE2 polyplex led to significantly higher (p < 0.05) in vivo pApoE2 expression than chitosan and unfunctionalized polymeric micelles-treated mice groups. The outcomes of this study predict that the developed multi-functionalized polymeric micelles could be an effective and safe gene delivery platform to the brain through the intranasal route.
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Affiliation(s)
| | | | | | | | - Jagdish Singh
- Department of Pharmaceutical Sciences, School of Pharmacy, College of Health Professions, North Dakota State University, Fargo, ND 58105, USA; (A.G.); (R.N.L.L.); (R.T.); (B.C.)
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19
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Amici J, Banaudi G, Longo M, Gandolfo M, Zanon M, Francia C, Bodoardo S, Sangermano M. Efficient Biorenewable Membranes in Lithium-Oxygen Batteries. Polymers (Basel) 2023; 15:3182. [PMID: 37571076 PMCID: PMC10420843 DOI: 10.3390/polym15153182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 08/13/2023] Open
Abstract
Lithium-oxygen batteries, with their very high energy density (3500 Wh kg-1), could represent a real breakthrough in the envisioned strategies towards more efficient energy storage solutions for a less and less carbonated energy mix. However, the problems associated with this technology are numerous. A first one is linked to the high reactivity of the lithium metal anode, while a second one is linked to the highly oxidative environment created by the cell's O2 saturation. Keeping in mind the necessity for greener materials in future energy storage solutions, in this work an innovative lithium protective membrane is prepared based on chitosan, a polysaccharide obtained from the deacetylation reaction of chitin. Chitosan was methacrylated through a simple, one-step reaction in water and then cross-linked by UV-induced radical polymerization. The obtained membranes were successively activated in liquid electrolyte and used as a lithium protection layer. The cells prepared with protected lithium were able to reach a higher full discharge capacity, and the chitosan's ability to slow down degradation processes was verified by post-mortem analyses. Moreover, in long cycling conditions, the protected lithium cell performed more than 40 cycles at 0.1 mA cm-2, at a fixed capacity of 0.5 mAh cm-2, retaining 100% coulombic efficiency, which is more than twice the lifespan of the bare lithium cell.
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Affiliation(s)
- Julia Amici
- Department of Applied Science and Technology, Politecnico di Torino, c.so Duca degli Abruzzi 24, 10129 Torino, Italy (M.L.); (M.S.)
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Lam ILJ, Mohd Affandy MA, 'Aqilah NMN, Vonnie JM, Felicia WXL, Rovina K. Physicochemical Characterization and Antimicrobial Analysis of Vegetal Chitosan Extracted from Distinct Forest Fungi Species. Polymers (Basel) 2023; 15:polym15102328. [PMID: 37242902 DOI: 10.3390/polym15102328] [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: 02/10/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 05/28/2023] Open
Abstract
The main goal of this investigation is to conduct a thorough analysis of the physical, chemical, and morphological characteristics of chitosan derived from various forest fungi. Additionally, the study aims to determine the effectiveness of this vegetal chitosan as an antimicrobial agent. In this study, Auricularia auricula-judae, Hericium erinaceus, Pleurotus ostreatus, Tremella fuciformis, and Lentinula edodes were examined. The fungi samples were subjected to a series of rigorous chemical extraction procedures, including demineralization, deproteinization, discoloration, and deacetylation. Subsequently, the chitosan samples were subjected to a comprehensive physicochemical characterization analysis, encompassing Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), degree of deacetylation determination, ash content determination, moisture content determination, and solubility determination. To evaluate the antimicrobial efficacy of the vegetal chitosan samples, two different sampling parameters were employed, namely human hand and banana, to assess their effectiveness in inhibiting microbial growth. Notably, the percentage of chitin and chitosan varied significantly among the distinct fungal species examined. Moreover, EDX spectroscopy confirmed the extraction of chitosan from H. erinaceus, L. edodes, P. ostreatus, and T. fuciformis. The FTIR spectra of all samples revealed a similar absorbance pattern, albeit with varying peak intensities. Furthermore, the XRD patterns for each sample were nearly identical, with the exception of the A. auricula-judae sample, which exhibited sharp peaks at ~37° and ~51°, while the crystallinity index of this same sample was approximately 17% lower than the others. The moisture content results indicated that the L. edodes sample was the least stable, while the P. ostreatus sample was the most stable, in terms of degradation rate. Similarly, the solubility of the samples showed substantial variation among each species, with the H. erinaceus sample displaying the highest solubility among the rest. Lastly, the antimicrobial activity of the chitosan solutions exhibited different efficacies in inhibiting microbial growth of skin microflora and microbes found on the peel of Musa acuminata × balbisiana.
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Affiliation(s)
- Iversen Luk Jun Lam
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | | | - Nasir Md Nur 'Aqilah
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Joseph Merillyn Vonnie
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Wen Xia Ling Felicia
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
| | - Kobun Rovina
- Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Kota Kinabalu 88400, Sabah, Malaysia
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Sathiyaseelan A, Saravanakumar K, Zhang X, Naveen KV, Wang MH. Ampicillin-resistant bacterial pathogens targeted chitosan nano-drug delivery system (CS-AMP-P-ZnO) for combinational antibacterial treatment. Int J Biol Macromol 2023; 237:124129. [PMID: 36958450 DOI: 10.1016/j.ijbiomac.2023.124129] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/25/2023] [Accepted: 03/18/2023] [Indexed: 03/25/2023]
Abstract
Drug-resistant microorganisms are defeated using combinational drug delivery systems based on biopolymer chitosan (CS) and metal nanoparticles. Hence, PEGylated zinc oxide nanoparticles (P-ZnO NPs) decorated chitosan-based nanoparticles (CS NPs) were prepared to deliver ampicillin (AMP) for improved antibacterial activity. In comparison to ZnO NPs, P-ZnO NPs exhibit less aggregation and more stable rod morphologies in TEM. The size of the P-ZnO NPs decreased and was engulfed by the spherical CS-AMP NPs. The zeta potential of the CS-AMP-P-ZnO NPs was determined to be -32.93 mV and the hydrodynamic size to be 210.2 nm. Further, DEE and DLE of CS-AMP (2.0:0.2 w/w) showed 79.60 ± 2.62 % and 15.14 ± 2.11 %, respectively. The cumulative AMP release was observed at >50 % at 48 h at pH 5.4 and 7.4. Additionally, when compared to AMP, CS-AMP-P-ZnO NPs had better antibacterial activity against E. coli, due to the alternation of cell membrane permeability by CS and ZnO NPs. Moreover, the hemolytic properties of ZnO NPs were attenuated because of PEGylation and CS. Furthermore, due to the biocompatible effect of CS, CS-AMP-P-ZnO NPs did not exhibit toxicity on cells and chick embryos. Hence, this study concludes that CS-AMP-P-ZnO NPs could be a promising antibacterial agent.
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Affiliation(s)
- Anbazhagan Sathiyaseelan
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Kandasamy Saravanakumar
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Xin Zhang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Kumar Vishven Naveen
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Myeong-Hyeon Wang
- Department of Bio-Health Convergence, Kangwon National University, Chuncheon 200-701, Republic of Korea.
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22
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Alharbi RA, Alminderej FM, Al-Harby NF, Elmehbad NY, Mohamed NA. Preparation and Characterization of a New Bis-Uracil Chitosan-Based Hydrogel as Efficient Adsorbent for Removal of Anionic Congo Red Dye. Polymers (Basel) 2023; 15:polym15061529. [PMID: 36987309 PMCID: PMC10056002 DOI: 10.3390/polym15061529] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/11/2023] [Accepted: 03/12/2023] [Indexed: 03/30/2023] Open
Abstract
A new hydrogel, based on chitosan crosslinked with 2-chlorophenyl-bis(6-amino-1,3-dimethyluracil-5-yl) methane, (2Clph-BU-Cs), has been successfully created. Various instrumental techniques such as elemental analysis, FTIR, SEM, and XRD were used to prove its structure. Its removal efficiency for anionic Congo red (CR) dye under different conditions for industrial wastewater treatment was studied. For optimizing the conditions to maximize CR dye removal, the impacts of temperature, contact time, pH, and initial concentration of the dye on adsorption capacity were investigated. The removal of the dye was pH-dependent, with a much higher value achieved at pH 4 than at pH 7 and 9. The maximum adsorption capacity of the hydrogel was 93.46 mg g-1. The model of adsorption process was fitted to the pseudo-second-order kinetic model. The intraparticle diffusion demonstrated the multi-step nature of the adsorption process. The thermodynamic results showed that the adsorption process was endothermic because of the positive value of enthalpy (43.70 kJ mol-1). The process of adsorption at high temperatures was spontaneous, according to the values of ∆G0. An increase in randomness was seen in the value of ∆S°. Generally, the investigated hydrogel has the potential to be used as a promising effective reusable adsorbent for industrial wastewater remediation.
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Affiliation(s)
- Rana A Alharbi
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
| | - Fahad M Alminderej
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
| | - Nouf F Al-Harby
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
| | - Noura Y Elmehbad
- Department of Chemistry, Faculty of Science and Arts, Najran University, Najran 55461, Saudi Arabia
| | - Nadia A Mohamed
- Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
- Department of Chemistry, Faculty of Science, Cairo University, Giza 12613, Egypt
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23
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Pádua AS, Figueiredo L, Silva JC, Borges JP. Chitosan scaffolds with mesoporous hydroxyapatite and mesoporous bioactive glass. Prog Biomater 2023; 12:137-153. [PMID: 36757613 PMCID: PMC10154456 DOI: 10.1007/s40204-023-00217-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Accepted: 01/18/2023] [Indexed: 02/10/2023] Open
Abstract
Bone regeneration is one of the most well-known fields in tissue regeneration. The major focus concerns polymeric/ceramic composite scaffolds. In this work, several composite scaffolds based on chitosan (CH), with low and high molecular weights, and different concentrations of ceramics like mesoporous bioactive glass (MBG), mesoporous hydroxyapatite (MHAp) and both MBG and MHAp (MC) were produced by lyophilization. The purpose is to identify the best combination regarding optimal morphology and properties. The tests of the scaffolds present a highly porous structure with interconnected pores. The compression modulus increases with ceramic concentration in the scaffolds. Furthermore, the 75%MBG (835 ± 160 kPa) and 50%MC (1070 ± 205 kPa) samples are the ones that mostly enhance increases in mechanical properties. The swelling capacity increases with MBG and MC, respectively, to 700% and 900% and decreases to 400% when MHAp concentration increases. All scaffolds are non-cytotoxic at 12.5 mg/mL. The CHL scaffolds improve cell adhesion and proliferation compared to CHH, and the MC scaffold samples, show better results than those produced with just MBG or MHAp. The composite scaffolds of chitosan with MBG and MHAp, have revealed to be the best combination due to their enhanced performance in bone tissue engineering.
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Affiliation(s)
- Ana Sofia Pádua
- I3N/CENIMAT, Materials Science Department, NOVA School of Science and Technology, New University of Lisbon, Lisbon, Portugal
| | - Lígia Figueiredo
- Bioceramed S.A., Rua José Gomes Ferreira 1, Arm D, São Julião Do Tojal, 2660-360, Loures, Portugal
| | - Jorge Carvalho Silva
- I3N/CENIMAT, Physics Department, NOVA School of Science and Technology, New University of Lisbon, Caparica, Portugal.
| | - João Paulo Borges
- I3N/CENIMAT, Materials Science Department, NOVA School of Science and Technology, New University of Lisbon, Lisbon, Portugal.
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24
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Waiprib Y, Ingrungruengluet P, Worawattanamateekul W. Nanoparticles Based on Chondroitin Sulfate from Tuna Heads and Chitooligosaccharides for Enhanced Water Solubility and Sustained Release of Curcumin. Polymers (Basel) 2023; 15:polym15040834. [PMID: 36850119 PMCID: PMC9965308 DOI: 10.3390/polym15040834] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/02/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
This study aimed to separate chondroitin sulfate (CS) from the heads of skipjack tuna (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares), by-products derived from canned tuna processing, via a biological process. The use of 1% w/w papain and an incubation time of 48 h resulted in a degree of hydrolysis of 93.75 ± 2.94% and a CS content of 59.53 ± 1.77 mg/100 g. The FTIR spectra of extracted CS products exhibited identical functional groups found in commercially available CS. The molecular weights of CS extracted from skipjack and yellowfin tuna heads were 11.0 kDa and 7.7 kDa, respectively. Subsequently, a CH:CS ratio of 3:2 for CS and chitooligosaccharides (CH) was chosen as the optimal ratio for the preparation of spherical nanoparticles, with %EE, mean particle size, PDI, and zeta potential values of 50.89 ± 0.66%, 128.90 ± 3.29 nm, 0.27 ± 0.04, and -12.47 ± 2.06, respectively. The CU content was enhanced to 127.21 ± 1.66 μg/mL. The release of CU from this particular nanosystem involved mainly a drug diffusion mechanism, with a burst release in the first 3 h followed by a sustained release of CU over 24 h. The DPPH and ABTS scavenging activity results confirmed the efficient encapsulation of CU into CHCS nanoparticles. This study will provide a theoretical basis for CS derived from tuna head cartilages to be used as a functional component with specific functional properties in food and biomedical applications.
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Affiliation(s)
- Yaowapha Waiprib
- Department of Fishery Products, Faculty of Fisheries, Kasetsart University, Bangkok 10900, Thailand
- Center for Advanced Studies for Agriculture and Food (CASAF), Kasetsart University Institute for Advanced Studies, Kasetsart University, Bangkok 10900, Thailand
- Correspondence: ; Tel.: +66-814592125
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25
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Zegarra-Urquia CL, Santiago J, Bumgardner JD, Goroncy AK, Vega-Baudrit J, Hernández-Escobar CA, Zaragoza-Contreras EA. Characterization of isoniazid incorporation into chitosan-poly(aspartic acid) nanoparticles. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2145287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - Julio Santiago
- Departamento de Química Orgánica, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Joel D. Bumgardner
- Biomedical Engineering, The University of Memphis, Memphis, Tennessee, USA
| | | | - José Vega-Baudrit
- Centro Nacional de Alta Tecnología “Dr. Franklin Chang Díaz”, Laboratorio Nacional de Nanotecnología (LANOTEC), San José, Costa Rica
- POLIUNA, Escuela de Química, Universidad Nacional, Heredia, Costa Rica
| | - Claudia A. Hernández-Escobar
- Department of Engineering and Materials Chemistry, Centro de Investigación en Materiales Avanzados, Complejo Industrial Chihuahua, Chihuahua, Mexico
| | - E. Armando Zaragoza-Contreras
- Department of Engineering and Materials Chemistry, Centro de Investigación en Materiales Avanzados, Complejo Industrial Chihuahua, Chihuahua, Mexico
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26
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Maruthupandy M, Muneeswaran T, Chackaravarthi G, Vennila T, Anand M, Cho WS, Quero F. Synthesis of chitosan/SnO2 nanocomposites by chemical precipitation for enhanced visible light photocatalytic degradation efficiency of congo red and rhodamine-B dye molecules. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Sun Y, Ji X, Cui J, Mi Y, Zhang J, Guo Z. Synthesis, Characterization, and the Antioxidant Activity of Phenolic Acid Chitooligosaccharide Derivatives. Mar Drugs 2022; 20:md20080489. [PMID: 36005492 PMCID: PMC9410539 DOI: 10.3390/md20080489] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022] Open
Abstract
A series of phenolic acid chitooligosaccharide (COS) derivatives synthesized by two mild and green methods were illuminated in this paper. Seven phenolic acids were selected to combine two kinds of COS derivatives: the phenolic acid chitooligosaccharide salt derivatives and the phenolic-acid-acylated chitooligosaccharide derivatives. The structures of the derivatives were characterized by FT-IR and 1H NMR spectra. The antioxidant experiment results in vitro (including DPPH-radical scavenging activity, superoxide-radical scavenging activity, hydroxyl-radical scavenging ability, and reducing power) demonstrated that the derivatives exhibited significantly enhanced antioxidant activity compared to COS. Moreover, the study showed that the phenolic acid chitooligosaccharide salts had stronger antioxidant activity than phenolic-acid-acylated chitooligosaccharide. The cytotoxicity assay of L929 cells in vitro indicated that the derivatives had low cytotoxicity and good biocompatibility. In conclusion, this study provides a possible synthetic method for developing novel and nontoxic antioxidant agents which can be used in the food and cosmetics industry.
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Affiliation(s)
- Yan Sun
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (Y.S.); (J.C.); (Y.M.); (J.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xia Ji
- School of Pharmacy, Qilu Medical University, Zibo 255300, China
- Correspondence: (X.J.); (Z.G.)
| | - Jingmin Cui
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (Y.S.); (J.C.); (Y.M.); (J.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yingqi Mi
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (Y.S.); (J.C.); (Y.M.); (J.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingjing Zhang
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (Y.S.); (J.C.); (Y.M.); (J.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhanyong Guo
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China; (Y.S.); (J.C.); (Y.M.); (J.Z.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (X.J.); (Z.G.)
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28
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Impact of Deacetylation Degree on Properties of Chitosan for Formation of Electrosprayed Nanoparticles. JOURNAL OF NANOTECHNOLOGY 2022. [DOI: 10.1155/2022/2288892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Biopolymer of natural origin as chitosan has been studied and applied widely in practice. In the pharmaceutical field, especially, chitosan nanoparticles have been researched for a variety of drug delivery systems. There are many factors influencing the success of the chitosan nanoparticle delivery system. Therein, the specific parameters to the physicochemical nature of chitosan greatly determine the efficiency of its drugs carrier. The degree of deacetylation (DD) of chitosan is one of those parameters. In this study, the influence of DD on chitosan properties was clarified to facilitate the preparation of nanoparticles by the electrospraying method. DD can affect the solubility, crystallinity, and surface tension of chitosan, but it cannot strongly impact the viscosity of chitosan solution as much as the molecular weight (Mv). From these results, M3 chitosan, owning a high DD of 86.70%, and crystalline index of 44%, was dissolved in acetic acid for the collection of electrosprayed nanoparticles. The M3 solution having low viscosity of under 50 mm2/s displayed the easy adjustment of the stable Taylor-cone droplet at the nozzle tip. Particularly, the M3 chitosan solution with a concentration of 1.5 wt.% in acetic acid of 90 wt.% concentration operated at the working condition of 12 kV voltage, a distance between the two electrodes of 10 cm created spherical particles with an average diameter of 338 nm, narrow size distribution. These chitosan nanoparticles can obtain the initial requirement for application as injectable drugs carrier.
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Ferreira DDCM, Ferreira SO, de Alvarenga ES, Soares NDFF, Coimbra JSDR, de Oliveira EB. Polyelectrolyte complexes obtained from chitosan and carboxymethylcellulose: a physicochemical and microstructural study. CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS 2022. [DOI: 10.1016/j.carpta.2022.100197] [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] Open
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Freitas DS, Teixeira P, Pinheiro IB, Castanheira EMS, Coutinho PJG, Alves MJ. Chitosan Nano/Microformulations for Antimicrobial Protection of Leather with a Potential Impact in Tanning Industry. MATERIALS 2022; 15:ma15051750. [PMID: 35268982 PMCID: PMC8911499 DOI: 10.3390/ma15051750] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 01/27/2023]
Abstract
Tanned leather can be attacked by microorganisms. To ensure resistance to bacteria on leather surfaces, protection solutions need to be developed, addressing both environmental issues and economic viability. In this work, chitosan nano/microparticles (CNP) and chitosan/silver nano/microstructures (CSNP), containing silver nanoparticles around 17 nm size, were incorporated into leather, obtained from the industrial process. Low loads of chitosan-based nano/microformulations, 0.1% mass ratio, resulted in total bacteria reduction (100%) after 2 h towards Gram-positive Staphylococcus aureus, both with CNP and CSNP coatings. Otherwise, comparable tests with the Gram-negative bacteria, Klebsiella pneumoniae, Escherichia coli, showed no significant improvement under the coating acidic conditions. The antimicrobial activity was evaluated by standard test methods: (1) inhibition halo and (2) dynamic contact conditions. The developed protection of leather either with CNP or CSNP is much higher than the one obtained with a simple chitosan solution.
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Affiliation(s)
- David S. Freitas
- Centre of Chemistry and Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (D.S.F.); (I.B.P.)
| | - Pilar Teixeira
- CEB—Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
- LABBELS—Associate Laboratory, 4800-122 Braga, Portugal
| | - Inês B. Pinheiro
- Centre of Chemistry and Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (D.S.F.); (I.B.P.)
| | - Elisabete M. S. Castanheira
- Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
- LaPMET—Laboratory of Physics for Materials and Emergent Technologies, 4800-122 Braga, Portugal
| | - Paulo J. G. Coutinho
- Centre of Physics of Minho and Porto Universities (CF-UM-UP), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal;
- LaPMET—Laboratory of Physics for Materials and Emergent Technologies, 4800-122 Braga, Portugal
- Correspondence: (P.J.G.C.); (M.J.A.)
| | - Maria J. Alves
- Centre of Chemistry and Department of Chemistry, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal; (D.S.F.); (I.B.P.)
- Correspondence: (P.J.G.C.); (M.J.A.)
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Cost-effective fabrication, antibacterial application and cell viability studies of modified nonwoven cotton fabric. Sci Rep 2022; 12:2493. [PMID: 35169158 PMCID: PMC8847346 DOI: 10.1038/s41598-022-06391-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 01/28/2022] [Indexed: 11/08/2022] Open
Abstract
In the present work, nonwoven cotton fabric was modified for antibacterial applications using low-cost and eco-friendly precursors. The treatment of fabric with alkali leads to the formation of active sites for surface modification, followed by dip coating with silver nanoparticles and chitosan. The surface was chlorinated in the next step to transform amide (N-H) groups in chitosan into N-halamine (N-Cl). The modified and unmodified surfaces of the nonwoven cotton fabric have been characterized by FTIR, SEM, and XRD. The active chlorine loading is measured with iodine/sodium thiosulphate. The antimicrobial activity and cell toxicity assay were carried out with and without modifications of nonwoven cotton fabric. The antimicrobial efficacies of loaded fabric were evaluated against four bacterial species (Micrococcus luteus, Staphylococcus aureus, Enterobacter aerogenes, and E.coli). It was found that modified fabric exhibited superior efficiency against gram-positive and gram-negative bacterial strains as compared to their bulk counterparts upon exposure without affecting strength and integrity of fabric. The overall process is economical for commercial purposes. The modified fabric can be used for antimicrobial, health, and food packaging industries, and in other biomedical applications.
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Zegarra-Urquia CL, Santiago J, Bumgardner JD, Vega-Baudrit J, Hernández-Escobar CA, Zaragoza-Contreras EA. Synthesis of nanoparticles of the chitosan-poly((α,β)-DL-aspartic acid) polyelectrolite complex as hydrophilic drug carrier. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2029440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
| | - Julio Santiago
- Departamento de Química Orgánica, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Joel D. Bumgardner
- Biomedical Engineering, The University of Memphis, Memphis, Tennessee, USA
| | - José Vega-Baudrit
- Centro Nacional de Alta Tecnología “Dr. Franklin Chang Díaz”, Laboratorio Nacional de Nanotecnología (LANOTEC), San José, Costa Rica
- POLIUNA, Escuela de Química, Universidad Nacional, Heredia, Costa Rica
| | - Claudia A. Hernández-Escobar
- Department of Engineering and Materials Chemistry, Centro de Investigación en Materiales Avanzados, S.C. Chihuahua, Chih, Complejo Industrial Chihuahua, Chihuahua, Mexico
| | - E. Armando Zaragoza-Contreras
- Department of Engineering and Materials Chemistry, Centro de Investigación en Materiales Avanzados, S.C. Chihuahua, Chih, Complejo Industrial Chihuahua, Chihuahua, Mexico
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Graphene-Oxide Porous Biopolymer Hybrids Enhance In Vitro Osteogenic Differentiation and Promote Ectopic Osteogenesis In Vivo. Int J Mol Sci 2022; 23:ijms23010491. [PMID: 35008918 PMCID: PMC8745160 DOI: 10.3390/ijms23010491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/20/2021] [Accepted: 12/29/2021] [Indexed: 11/17/2022] Open
Abstract
Over the years, natural-based scaffolds have presented impressive results for bone tissue engineering (BTE) application. Further, outstanding interactions have been observed during the interaction of graphene oxide (GO)-reinforced biomaterials with both specific cell cultures and injured bone during in vivo experimental conditions. This research hereby addresses the potential of fish gelatin/chitosan (GCs) hybrids reinforced with GO to support in vitro osteogenic differentiation and, further, to investigate its behavior when implanted ectopically. Standard GCs formulation was referenced against genipin (Gp) crosslinked blend and 0.5 wt.% additivated GO composite (GCsGp/GO 0.5 wt.%). Pre-osteoblasts were put in contact with these composites and induced to differentiate in vitro towards mature osteoblasts for 28 days. Specific bone makers were investigated by qPCR and immunolabeling. Next, CD1 mice models were used to assess de novo osteogenic potential by ectopic implantation in the subcutaneous dorsum pocket of the animals. After 4 weeks, alkaline phosphate (ALP) and calcium deposits together with collagen synthesis were investigated by biochemical analysis and histology, respectively. Further, ex vivo materials were studied after surgery regarding biomineralization and morphological changes by means of qualitative and quantitative methods. Furthermore, X-ray diffraction and Fourier-transform infrared spectroscopy underlined the newly fashioned material structuration by virtue of mineralized extracellular matrix. Specific bone markers determination stressed the osteogenic phenotype of the cells populating the material in vitro and successfully differentiated towards mature bone cells. In vivo results of specific histological staining assays highlighted collagen formation and calcium deposits, which were further validated by micro-CT. It was observed that the addition of 0.5 wt.% GO had an overall significant positive effect on both in vitro differentiation and in vivo bone cell recruitment in the subcutaneous region. These data support the GO bioactivity in osteogenesis mechanisms as being self-sufficient to elevate osteoblast differentiation and bone formation in ectopic sites while lacking the most common osteoinductive agents.
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Ultrasonic Synthesis of Nanochitosan and Its Size Effects on Turbidity Removal and Dealkalization in Wastewater Treatment. INVENTIONS 2021. [DOI: 10.3390/inventions6040098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A detailed study on the synthesis of chitosan nanoparticles under ultrasonication is reported in this paper. By using this simple technique, chitosan particles in nanometer range can be easily prepared without using any harmful and expensive chemicals. The results show that increasing the ultrasonic irradiation time and ultrasonic wave amplitude are the key factors for producing discrete chitosan nanoparticles with narrow particle size distribution. The resulting nanoparticles show superior turbidity removal efficiency (75.4%) and dealkalization (58.3%) in wastewater treatment than the bulk chitosan solid (35.4% and 11.1%, respectively), thus offering an eco-friendly and promising approach for treating wastewater via the coagulation/flocculation process.
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Chitosan crosslinking with pyridoxal 5-phosphate vitamer toward biocompatible hydrogels for in vivo applications. Int J Biol Macromol 2021; 193:1734-1743. [PMID: 34785198 DOI: 10.1016/j.ijbiomac.2021.10.228] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 12/29/2022]
Abstract
Vitamin B6 is an essential micronutrient in the mammalian diet, with role of coenzyme and synergistic effect with some antibiotics and antitumor drugs. Based on these, we hypothesized that its use for the preparation of hydrogels can yield multifunctional biomaterials suitable for in vivo applications. To this aim, chitosan was reacted with the active form of vitamin B6, pyridoxal 5-phosphate, via acid condensation, when clear hydrogels were obtained. Their investigation by structural characterization methods proved that the hydrogelation was a consequence of both covalent imine formation and physical interactions. The novel hydrogels had microporous morphology and showed shrinking effect in phosphate buffer, indicating good shape preservation and slow dissolution in in vivo environment. Their enzymatic biodegradation could be controlled by the imination degree, varying from 40 to 61% in 21 days. They demonstrated very good in vitro cytocompatibility on normal human dermal fibroblasts cells and no harmful effect on experimental mice, confirming their safely use for in vivo application.
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Reis CA, Júnior MG, Moreira FKV, Marconcini JM, Vaz LEVDSB. Synthesis and characterization of chitosan/montmorillonite nanocomposites for application as edible coating. FOOD SCI TECHNOL INT 2021; 29:25-39. [PMID: 34756149 DOI: 10.1177/10820132211057718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Edible coating can improve fruits shelf life and, consequently, reduce their waste. Chitosan, which presents a potential for chemical modifications and capacity to form films, can be an alternative for coating due to its biocompatibility, biodegradability, and antimicrobial properties. Chitosan film can be obtained through casting method presenting suitable mechanical properties, such as resistance to traction and elongation, ability to adhere to surfaces and selective permeability to gases, such as O2 and CO2. However, it is highly permeable to water vapor, which can limit its potential coating use. The properties of chitosan films can be improved through the formation of composites by inserting nanoclays as montmorillonite in the polymeric matrix. The objective of this study was to develop and characterize chitosan/montmorillonite nanocomposites for fruit coating aiming for future applications in the field of smart packaging. Nanocomposites were characterized by its microstructure, thermal, mechanical, and physicochemical properties. X-ray diffraction analysis indicated changes in crystallinity with the insertion of montmorillonite. Nanocomposites became more transparent and significantly reduced its water permeability rate with 0.5% w/w montmorillonite addition. Elastic rigidity and tensile strength of the films were improved. Chitosan/montmorillonite nanocomposites demonstrated the potential to improve the storage time of Williams pears.
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Affiliation(s)
- Camily Aparecida Reis
- Programa de Pós-Graduação em Engenharia de Biomateriais, 67739Universidade Federal de Lavras, Lavras, MG, Brazil
| | - Mário Guimarães Júnior
- Departamento de Eletromecânica, Centro Federal de Educação Tecnológica de Minas Gerais, Araxá, MG, Brazil
| | | | - José Manoel Marconcini
- Laboratório Nacional de Nanotecnologia (LNNA), 564899Embrapa Instrumentação, São Carlos, SP, Brazil
| | - Lívia Elisabeth Vasconcellos de Siqueira Brandão Vaz
- Programa de Pós-Graduação em Engenharia de Biomateriais, 67739Universidade Federal de Lavras, Lavras, MG, Brazil.,Departamento de Engenharia, Escola de Engenharia, 67739Universidade Federal de Lavras, Lavras, MG, Brazil
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Uyanga KA, Daoud WA. Carboxymethyl cellulose-chitosan composite hydrogel: Modelling and experimental study of the effect of composition on microstructure and swelling response. Int J Biol Macromol 2021; 181:1010-1022. [PMID: 33892027 DOI: 10.1016/j.ijbiomac.2021.04.117] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Revised: 02/27/2021] [Accepted: 04/18/2021] [Indexed: 12/15/2022]
Abstract
Molecular recognition is essential for the advancement of functional supramolecular natural polymer-based hydrogels. First, a series of carboxymethyl cellulose (CMC)-chitosan (CSN) hydrogels crosslinked with fumaric acid are studied, where the influence of composition on microstructure and swelling is investigated using mathematical modelling and experiment and the hydrolytic properties, microstructure parameters and physicochemical properties are examined. Second, best fit values for the responses are obtained using multiple linear regression and MATLAB R2020a curve fitting and predictive models are generated. Third, the optimum microstructure is loaded with polyethylene glycol (PEG) and bismuth telluride (Bi2Te3) and coated on fabric for imparting thermal sensitivity. The results show that (1) optimum microstructure (25.65 ± 1.86 nm mesh size, 116.25 ± 0.00 μmol/cm3 effective crosslinking-density, 348.03 ± 10.81% swelling, and 62.86 ± 1.11% gel fraction) is found at CMC:CSN = 1:3 for G3; (2) the model shows good agreement with experimental data demonstrating potential for estimating hydrogel swelling and microstructure; and (3) G3/PEG and G3/PEG/Bi2Te3 enhance thermal conductivity of fabric at ambient, body, and elevated temperatures. The study demonstrates the potential of the generated model in predicting CMC-CSN swelling and G3 as an ideal host matrix for wearable textiles/devices.
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Affiliation(s)
- Kindness A Uyanga
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Walid A Daoud
- School of Energy and Environment, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
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Vicente FA, Huš M, Likozar B, Novak U. Chitin Deacetylation Using Deep Eutectic Solvents: Ab Initio-Supported Process Optimization. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2021; 9:3874-3886. [PMID: 33842102 PMCID: PMC8025712 DOI: 10.1021/acssuschemeng.0c08976] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/14/2021] [Indexed: 06/12/2023]
Abstract
Chitin is the most abundant marine biopolymer, being recovered during the shell biorefining of crustacean shell waste. In its native form, chitin displays a poor reactivity and solubility in most solvents due to its extensive hydrogen bonding. This can be overcome by deacetylation. However, this process requires a high concentration of acids or bases at high temperatures, forming large amounts of toxic waste. Herein, we report on the first deacetylation with deep eutectic solvents (DESs) as an environmentally friendly alternative, requiring only mild reaction conditions. Biocompatible DESs are efficient in disturbing the native hydrogen-bonding network of chitin, readily dissolving it. First, quantum chemical calculations have been performed to evaluate the feasibility of different DESs to perform chitin deacetylation by studying their mechanism. Comparing these with the calculated barriers for garden-variety alkaline/acidic hydrolysis, which are known to proceed, prospective DESs were identified with barriers around 25 kcal·mol-1 or lower. Based on density functional theory results, an experimental screening of 10 distinct DESs for chitin deacetylation followed. The most promising DESs were identified as K2CO3:glycerol (K2CO3:G), choline chloride:acetic acid ([Ch]Cl:AA), and choline chloride:malic acid ([Ch]Cl:MA) and were subjected to further optimization with respect to the water content, process duration, and temperature. Ultimately, [Ch]Cl:MA showed the best results, yielding a degree of deacetylation (DDA) of 40% after 24 h of reaction at 120 °C, which falls slightly behind the threshold value (50%) for chitin to be considered chitosan. Further quantum chemical calculations were performed to elucidate the mechanism. Upon the removal of 40% N-acetyl groups from the chitin structure, its reactivity was considerably improved.
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Affiliation(s)
- Filipa A. Vicente
- Department
of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
| | - Matej Huš
- Department
of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
- Association
For Technical Culture of Slovenia (ZOTKS), Zaloška 65, 1000 Ljubljana, Slovenia
| | - Blaž Likozar
- Department
of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
| | - Uroš Novak
- Department
of Catalysis and Chemical Reaction Engineering, National Institute of Chemistry, Hajdrihova ulica 19, 1000 Ljubljana, Slovenia
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