1
|
Contreras FA, Sepúlveda DP, Amaral AC, Nuñez JJ, Trovatti E, Suárez-Villota EY. Rheological and Biological Properties of Adhesive Skin Secretions from Eupsophus vertebralis (Anura: Alsodidae). SCIENTIFICA 2024; 2024:2722351. [PMID: 38566624 PMCID: PMC10985274 DOI: 10.1155/2024/2722351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 02/09/2024] [Accepted: 03/05/2024] [Indexed: 04/04/2024]
Abstract
Skin secretions from Patagonian ground frogs, Eupsophus vertebralis, have previously been reported as a potent proteinaceous adhesive with potential biomedical applications. Here, we conducted a rheological analysis indicating the mechanical robustness of these secretions, with a storage modulus ranging from 1 to 10 Pa. In addition, antimicrobial and cytotoxicity assays were performed, revealing no antimicrobial activity against both the Gram-positive and Gram-negative bacteria. The cytotoxicity results were intriguing, as three samples showed no harm, and one exhibited a severe cytotoxic effect on the human cell line MG63. These properties, as indicated by these preliminary results, reinforce their potential for practical applications in the industrial and medical sectors.
Collapse
Affiliation(s)
- Felipe A. Contreras
- Instituto de Ciencias Naturales, Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Av. Jorge Alessandri No. 1160, Concepción, Chile
| | - Daniela P. Sepúlveda
- Instituto de Ciencias Naturales, Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Av. Jorge Alessandri No. 1160, Concepción, Chile
| | - André Capaldo Amaral
- Program of Post-Graduation in Regenerative Medicine and Medicinal Chemistry, University of Araraquara–UNIARA, Rua Carlos Gomes, Araraquara 1217, Brazil
| | - José J. Nuñez
- Instituto de Ciencias Marinas y Limnológicas, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile
| | - Eliane Trovatti
- Program of Post-Graduation in Regenerative Medicine and Medicinal Chemistry, University of Araraquara–UNIARA, Rua Carlos Gomes, Araraquara 1217, Brazil
| | - Elkin Y. Suárez-Villota
- Instituto de Ciencias Naturales, Facultad de Medicina Veterinaria y Agronomía, Universidad de las Américas, Av. Jorge Alessandri No. 1160, Concepción, Chile
| |
Collapse
|
2
|
Viora L, Tichané T, Nottelet B, Mouton J, Garric X, Van Den Berghe H, Coudane J. Casein-based conjugates and graft copolymers. Synthesis, properties, and applications. Compr Rev Food Sci Food Saf 2024; 23:e13306. [PMID: 38369928 DOI: 10.1111/1541-4337.13306] [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: 08/25/2023] [Revised: 01/15/2024] [Accepted: 01/22/2024] [Indexed: 02/20/2024]
Abstract
Biobased natural polymers, including polymers of natural origin such as casein, are growing rapidly in the light of the environmental pollution caused by many mass-produced commercial synthetic polymers. Although casein has interesting intrinsic properties, especially for the food industry, numerous chemical reactions have been carried out to broaden the range of its properties, most of them preserving casein's nontoxicity and biodegradability. New conjugates and graft copolymers have been developed especially by Maillard reaction of the amine functions of the casein backbone with the aldehyde functions of sugars, polysaccharides, or other molecules. Carried out with dialdehydes, these reactions lead to the cross-linking of casein giving three-dimensional polymers. Acylation and polymerization of various monomers initiated by amine functions are also described. Other reactions, far less numerous, involve alcohol and carboxylic acid functions in casein. This review provides an overview of casein-based conjugates and graft copolymers, their properties, and potential applications.
Collapse
Affiliation(s)
- Laurianne Viora
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
| | - Teddy Tichané
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
| | - Benjamin Nottelet
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
| | - Julia Mouton
- Polymers Composites and Hybrids (PPCH), IMT Mines d'Alès, Alès, France
- EPF Graduate School of Engineering, Montpellier, France
| | - Xavier Garric
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
- Department of Pharmacy, Nîmes University Hospital, Nimes, France
| | - Hélène Van Den Berghe
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
| | - Jean Coudane
- IBMM (Institut des Biomolécules Max Mousseron), CNRS, Montpellier University, ENSCM, Department "Polymers for Health and Biomaterials", Pôle Chimie Balard, Montpellier, France
| |
Collapse
|
3
|
Li M, Guo Q, Lin Y, Bao H, Miao S. Recent Progress in Microencapsulation of Active Peptides-Wall Material, Preparation, and Application: A Review. Foods 2023; 12:foods12040896. [PMID: 36832971 PMCID: PMC9956665 DOI: 10.3390/foods12040896] [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: 01/06/2023] [Revised: 01/30/2023] [Accepted: 02/16/2023] [Indexed: 02/22/2023] Open
Abstract
Being a natural active substance with a wide variety of sources, easy access, significant curative effect, and high safety, active peptides have gradually become one of the new research directions in food, medicine, agriculture, and other fields in recent years. The technology associated with active peptides is constantly evolving. There are obvious difficulties in the preservation, delivery, and slow release of exposed peptides. Microencapsulation technology can effectively solve these difficulties and improve the utilization rate of active peptides. In this paper, the commonly used materials for embedding active peptides (natural polymer materials, modified polymer materials, and synthetic polymer materials) and embedding technologies are reviewed, with emphasis on four new technologies (microfluidics, microjets, layer-by-layer self-assembly, and yeast cells). Compared with natural materials, modified materials and synthetic polymer materials show higher embedding rates and mechanical strength. The new technology improves the preparation efficiency and embedding rate of microencapsulated peptides and makes the microencapsulated particle size tend to be controllable. In addition, the current application of peptide microcapsules in different fields was also introduced. Selecting active peptides with different functions, using appropriate materials and efficient preparation technology to achieve targeted delivery and slow release of active peptides in the application system, will become the focus of future research.
Collapse
Affiliation(s)
- Mengjie Li
- College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, China
| | - Quanyou Guo
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Yichen Lin
- Teagasc Food Research Centre, Moorepark, P61C996 Fermoy, Ireland
| | - Hairong Bao
- College of Food Science & Technology, Shanghai Ocean University, Shanghai 201306, China
- Correspondence: (H.B.); (S.M.)
| | - Song Miao
- Teagasc Food Research Centre, Moorepark, P61C996 Fermoy, Ireland
- Correspondence: (H.B.); (S.M.)
| |
Collapse
|
4
|
Wu X, Wu J, Mu C, Wang C, Lin W. Advances in Antimicrobial Polymer Coatings in the Leather Industry: A Comprehensive Review. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02600] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xiaobo Wu
- Department of Biomass and Leather Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China, 610065
| | - Jianhui Wu
- Department of Biomass and Leather Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China, 610065
| | - Changdao Mu
- Department of Pharmaceutics and Bioengineering, School of Chemical Engineering, Sichuan University, Chengdu, China, 610065
| | - Chunhua Wang
- Department of Biomass and Leather Engineering, Key Laboratory of Leather Chemistry and Engineering of Ministry of Education, Sichuan University, Chengdu, China, 610065
| | - Wei Lin
- National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, China, 610065
| |
Collapse
|
5
|
Cencha LG, Allasia M, Ronco LI, Luque GC, Picchio ML, Minari RJ, Gugliotta LM. Proteins as Promising Biobased Building Blocks for Preparing Functional Hybrid Protein/Synthetic Polymer Nanoparticles. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05958] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Luisa G. Cencha
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
- Facultad de Ingeniería y Ciencias Hídricas, Universidad Nacional del Litoral, Santa Fe, Santa Fe, S3000, Argentina
| | - Mariana Allasia
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
| | - Ludmila I. Ronco
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santa Fe, S3000, Argentina
| | - Gisela C. Luque
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santa Fe, S3000, Argentina
| | - Matías L. Picchio
- Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, IPQA—CONICET, Córdoba, Córdoba, X5000, Argentina
| | - Roque J. Minari
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santa Fe, S3000, Argentina
| | - Luis M. Gugliotta
- Polymer Reaction Engineering Group, INTEC, Universidad Nacional del Litoral, CONICET, Santa
Fe, Santa Fe, S3000, Argentina
- Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santa Fe, Santa Fe, S3000, Argentina
| |
Collapse
|
6
|
Chen S, Hori N, Kajiyama M, Takemura A. Thermal responsive poly(N-isopropylacrylamide) grafted chicken feather keratin prepared via surface initiated aqueous Cu(0)-mediated RDRP: Synthesis and properties. Int J Biol Macromol 2020; 153:364-372. [PMID: 32109472 DOI: 10.1016/j.ijbiomac.2020.02.277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/14/2020] [Accepted: 02/24/2020] [Indexed: 10/24/2022]
Abstract
Poultry chicken feather keratin was extracted and then modified for the fabrication of keratin-graft-PNIPAM copolymers. The keratin was well extracted from feather fiber and powdered. Subsequently, it underwent the surficial functionalization process with initiator groups. After the study conducted full disproportionation of Cu(I)Br/Me6Tren into Cu(0) and Cu(II)Br2 in the solvent, surface initiated aqueous Cu(0)-mediated reversible-deactivation radical polymerization (RDRP) of N-isopropylacrylamide (NIPAM) was performed in a methanol/water mixture solvent. The reaction was performed rapidly and efficiently, during which over 100% graft rate was achieved at 60 min. After 6 h reaction, 200% graft rate could be achieved. High graft rate (up to 287%) was achieved, and graft rate could be regulated by controlling the reaction time and the addition of monomer. The fabricated keratin-g-PNIPAM exhibited a rough surface. As revealed from the results of thermal analysis, the thermal stability of keratin-g-PNIPAM was enhanced noticeably compared with the original keratin. Besides, grafted PNIPAM chains exhibited a higher glass transition temperature. The grafted keratin particles displayed enhanced hydrophilicity. Keratin-g-PNIPAMs exhibit a lower LCST comparing to homopolymer and the flocculation in hot water behavior could be controlled by regulating graft rate.
Collapse
Affiliation(s)
- Sikai Chen
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Naruhito Hori
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Mikio Kajiyama
- Graduate School of life and environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Akio Takemura
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
| |
Collapse
|
7
|
Fan Q, Ma J, Xu Q. Insights into functional polymer-based organic-inorganic nanocomposites as leather finishes. JOURNAL OF LEATHER SCIENCE AND ENGINEERING 2019. [DOI: 10.1186/s42825-019-0005-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
8
|
Zhang Y, Ma J, Xu Q. Polyelectrolyte complex from cationized casein and sodium alginate for fragrance controlled release. Colloids Surf B Biointerfaces 2019; 178:439-444. [DOI: 10.1016/j.colsurfb.2019.03.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 03/07/2019] [Indexed: 11/16/2022]
|
9
|
Huang L, Wang M, Huang YY, El-Hussein A, Wolf LM, Chiang LY, Hamblin MR. Progressive cationic functionalization of chlorin derivatives for antimicrobial photodynamic inactivation and related vancomycin conjugates. Photochem Photobiol Sci 2018; 17:638-651. [PMID: 29701222 PMCID: PMC5955822 DOI: 10.1039/c7pp00389g] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 04/12/2018] [Indexed: 09/29/2023]
Abstract
It is known that multiple cationic charges are required to produce broad-spectrum antimicrobial photosensitizers (PS) for photodynamic inactivation (aPDI) or photodynamic therapy of bacteria and fungi. In the present study we describe the synthesis and aPDI testing of a set of derivatives prepared from the parent pheophytin molecule with different numbers of attached side arms (1-3) each consisting of five quaternized cationic groups (pentacationic), producing the corresponding [Zn2+]pheophorbide-a-N(C2N+C1C3)5 (Zn-Phe-N5+, 5 charges), [Zn2+]chlorin e6-[N(C2N+C1C3)5]2 (Zn-Chl-N10+, 10 charges) and [Zn2+]mesochlorin e6-[N(C2N+C1C3)5]3 (Zn-mChl-N15+, 15 charges). Moreover, a conjugate between Zn-Phe-N5+ and the antibiotic vancomycin called Van-[Zn2+]-m-pheophorbide-N(C2N+C1C3)5 (Van-Zn-mPhe-N5+) was also prepared. The aPDI activities of all compounds were based on Type-II photochemistry (1O2 generation). We tested these compounds against Gram-positive methicillin-resistant Staphylococcus aureus (MRSA), Gram-negative Escherichia coli, and the fungal yeast Candida albicans. All three compounds were highly active against MRSA, giving eradication (≥6 logs of killing) with <1.0 μM and 10 J cm-2 of 415 nm light. The order of activity was Zn-Phe-N5+ > Zn-Chl-N10+ > Zn-mChl-N15+. In the case of E coli the activity was much lower (eradication was only possible with 50 μM Zn-mChl-N15+ and 20 J cm-2). The order of activity was the reverse of that found with MRSA (Zn-mChl-N15+ > Zn-Chl-N10+ > Zn-Phe-N5+). Activity against C. albicans was similar to E. coli with Zn-mChl-N15+ giving eradication. The activity of Van-Zn-mPhe-N5+ was generally lower than that of Zn-Phe-N5+ (except for E. coli). Red (660 nm) light was also effective as might be expected from the absorption spectra. An initial finding that Van-Zn-mPhe-N5+ might have higher activity against vancomycin resistant Enterococcus fecium (VRE) strains (compared to vancomycin sensitive strains) was disproved when it was found that VRE strains were also more sensitive to aPDI with Zn-Phe-N5+. The minimum inhibitory concentrations of Van-Zn-mPhe-N5+ were higher than those of Van alone, showing that the antibiotic properties of the Van moiety were lessened in the conjugate. In conclusion, Zn-Phe-N5+ is a highly active PS against Gram-positive species and deserves further testing. Increasing the number of cationic charges increased aPDI efficacy on C. albicans and Gram-negative E. coli.
Collapse
Affiliation(s)
- Liyi Huang
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. and Department of Dermatology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Min Wang
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
| | - Ying-Ying Huang
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. and Department of Dermatology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Ahmed El-Hussein
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. and Department of Dermatology, Harvard Medical School, Boston, Massachusetts 02115, USA and The National Institute of Laser Enhanced Science (NILES), Cairo University, Egypt
| | - Lawrence M Wolf
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
| | - Long Y Chiang
- Department of Chemistry, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
| | - Michael R Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, USA. and Department of Dermatology, Harvard Medical School, Boston, Massachusetts 02115, USA and Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts 02139, USA
| |
Collapse
|
10
|
Fan Q, Ma J, Xu Q, Wang J, Ma Y. Facile Synthesis of Chitosan-Coated Silica Nanocapsules via Interfacial Condensation Approach for Sustained Release of Vanillin. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00217] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | | | | | - John Wang
- Department of Materials Science & Engineering, National University of Singapore (NUS), Singapore 117456
| | - Yanxiao Ma
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| |
Collapse
|
11
|
Antioxidative Potential of a Streptomyces sp. MUM292 Isolated from Mangrove Soil. BIOMED RESEARCH INTERNATIONAL 2018; 2018:4823126. [PMID: 29805975 PMCID: PMC5899857 DOI: 10.1155/2018/4823126] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 01/27/2018] [Accepted: 02/20/2018] [Indexed: 11/17/2022]
Abstract
Mangrove derived microorganisms constitute a rich bioresource for bioprospecting of bioactive natural products. This study explored the antioxidant potentials of Streptomyces bacteria derived from mangrove soil. Based on 16S rRNA phylogenetic analysis, strain MUM292 was identified as the genus Streptomyces. Strain MUM292 showed the highest 16S rRNA gene sequence similarity of 99.54% with S. griseoruber NBRC12873T. Furthermore, strain MUM292 was also characterized and showed phenotypic characteristics consistent with Streptomyces bacteria. Fermentation and extraction were performed to obtain the MUM292 extract containing the secondary metabolites of strain MUM292. The extract displayed promising antioxidant activities, including DPPH, ABTS, and superoxide radical scavenging and also metal-chelating activities. The process of lipid peroxidation in lipid-rich product was also retarded by MUM292 extract and resulted in reduced MDA production. The potential bioactive constituents of MUM292 extract were investigated using GC-MS and preliminary detection showed the presence of pyrazine, pyrrole, cyclic dipeptides, and phenolic compound in MUM292 extract. This work demonstrates that Streptomyces MUM292 can be a potential antioxidant resource for food and pharmaceutical industries.
Collapse
|
12
|
de Souza Soares L, de Faria JT, Amorim ML, de Araújo JM, Minim LA, dos Reis Coimbra JS, de Carvalho Teixeira AVN, de Oliveira EB. Rheological and Physicochemical Studies on Emulsions Formulated with Chitosan Previously Dispersed in Aqueous Solutions of Lactic Acid. FOOD BIOPHYS 2017. [DOI: 10.1007/s11483-017-9469-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
13
|
Davoodbasha M, Kim SC, Lee SY, Kim JW. The facile synthesis of chitosan-based silver nano-biocomposites via a solution plasma process and their potential antimicrobial efficacy. Arch Biochem Biophys 2016; 605:49-58. [PMID: 26853839 DOI: 10.1016/j.abb.2016.01.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Revised: 01/18/2016] [Accepted: 01/26/2016] [Indexed: 01/01/2023]
Abstract
Silver nanoparticles (AgNPs) were synthesized in a chitosan matrix with varying AgNO3 (1, 3, 5 mM) and chitosan (1, 3%) concentrations via the one-step solution plasma process (SPP). Plasma was discharged for 3 min in the AgNO3 and chitosan solutions using unipolar power at 800 V with a frequency of 30 kHz. Fibrous 3D scaffolds were prepared by lyophilizing the nano-biocomposite solutions, and they were stabilized via cross-linking with UV irradiation. UV-Vis spectroscopy showed strong peaks with maximal absorbance at 415-440 nm, indicating the formation of AgNPs in the chitosan with an increase in peak height as the concentration of the precursor, AgNO3, increased. The chemical association between AgNPs and chitosan was confirmed using Fourier transform infrared spectroscopy (FTIR). The scaffolds had a micro-porous structure with pore diameters in the range of 5.8-157.0 μm, and a transmission electron microscopy (TEM) analysis revealed that spherical shaped AgNPs with diameters in the range of 2.5-27.6 nm were well-dispersed in the biocomposites. The nano-biocomposites had a broad spectrum of antimicrobial activity against various pathogens with minimal inhibition concentrations of 0.68-2.71 and 2.71-10.80 μg mL(-1) for bacteria and fungi, respectively. These are the lowest concentrations achieved by nano-biocomposites reported thus far. The SPP was shown to be a facile, effective, and eco-friendly method of synthesizing nano-biocomposites for biomedical applications.
Collapse
Affiliation(s)
| | - Seong-Cheol Kim
- Department of Materials Engineering, Korea Aerospace University, Republic of Korea
| | - Sang-Yul Lee
- Department of Materials Engineering, Korea Aerospace University, Republic of Korea.
| | - Jung-Wan Kim
- Division of Bioengineering, Incheon National University, Republic of Korea.
| |
Collapse
|
14
|
A facile method for fabricating room-temperature-film-formable casein-based hollow nanospheres. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|