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Chou HS, Larsson M, Hsiao MH, Chen YC, Röding M, Nydén M, Liu DM. Injectable insulin-lysozyme-loaded nanogels with enzymatically-controlled degradation and release for basal insulin treatment: In vitro characterization and in vivo observation. J Control Release 2016; 224:33-42. [DOI: 10.1016/j.jconrel.2015.12.036] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Revised: 12/20/2015] [Accepted: 12/22/2015] [Indexed: 11/27/2022]
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Study of Enzymatically Treated Alginate/Chitosan Hydrosols in Sponges Formation Process. Polymers (Basel) 2016; 8:polym8010008. [PMID: 30979105 PMCID: PMC6432604 DOI: 10.3390/polym8010008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 12/16/2015] [Accepted: 12/30/2015] [Indexed: 11/16/2022] Open
Abstract
The aim of the study was to produce 3D sponges based on enzymatically modified lysozyme selected polysaccharides and assess their physicochemical properties. The alginate/chitosan sponges were formed from polymers hydrosols in different proportions at a final concentration of 1% polysaccharides. Hydrosols were modified by lysozyme addition of 1000 U. Hydrosols without or with enzyme were analyzed for their reducing sugar content, rheological properties and ability to scavenge free radicals. Sponges formed from hydrosols were tested for solubility and compressive properties. Only chitosan was hydrolyzed by lysozyme. The morphology of sponges was investigated by scanning electron microscopy (SEM). It was proven that the antioxidant properties of hydrosols are dependent on the concentration of chitosan. It was also shown that the addition of lysozyme negatively affected the free radical scavenging ability of single hydrosols of alginate and chitosan, and their mixtures. The Ostwald de Waele as well as Herschel⁻Bulkley models of rheological properties fitted the experimental data well (R² is between 0.947 and 1.000). Increase in textural features values of sponges was observed. Sponges with pure alginate and pure chitosan were almost completely soluble. The enzyme addition significantly changed the characteristics of the cross-section structure of sponges, and made the surface smoother.
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Novel triazolyl-functionalized chitosan derivatives with different chain lengths of aliphatic alcohol substituent: Design, synthesis, and antifungal activity. Carbohydr Res 2015; 418:44-49. [DOI: 10.1016/j.carres.2015.10.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Revised: 10/09/2015] [Accepted: 10/10/2015] [Indexed: 02/05/2023]
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55
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Characterization of an acidic cellulase produced by Bacillus subtilis BY-4 isolated from gastrointestinal tract of Tibetan pig. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2015.04.025] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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56
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Marine polysaccharide-based nanomaterials as a novel source of nanobiotechnological applications. Int J Biol Macromol 2015; 82:315-27. [PMID: 26523336 DOI: 10.1016/j.ijbiomac.2015.10.081] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 10/13/2015] [Accepted: 10/27/2015] [Indexed: 11/23/2022]
Abstract
Research on marine polysaccharide-based nanomaterials is emerging in nanobiotechnological fields such as drug delivery, gene delivery, tissue engineering, cancer therapy, wound dressing, biosensors, and water treatment. Important properties of the marine polysaccharides include biocompatibility, biodegradability, nontoxicity, low cost, and abundance. Most of the marine polysaccharides are derived from natural sources such as fucoidan, alginates, carrageenan, agarose, porphyran, ulvan, mauran, chitin, chitosan, and chitooligosaccharide. Marine polysaccharides are very important biological macromolecules that widely exist in marine organisms. Marine polysaccharides exhibit a vast variety of structures and are still under-exploited and thus should be considered as a novel source of natural products for drug discovery. An enormous variety of polysaccharides can be extracted from marine organisms such as algae, crustaceans, and microorganisms. Marine polysaccharides have been shown to have a variety of biological and biomedical properties. Recently, research and development of marine polysaccharide-based nanomaterials have received considerable attention as one of the major resources for nanotechnological applications. This review highlights the recent research on marine polysaccharide-based nanomaterials for biotechnological and biomedical applications.
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Chang SH, Lin HTV, Wu GJ, Tsai GJ. pH Effects on solubility, zeta potential, and correlation between antibacterial activity and molecular weight of chitosan. Carbohydr Polym 2015; 134:74-81. [PMID: 26428102 DOI: 10.1016/j.carbpol.2015.07.072] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/17/2015] [Accepted: 07/21/2015] [Indexed: 11/29/2022]
Abstract
Six chitosans with molecular weights (MWs) of 300, 156, 72.1, 29.2, 7.1, and 3.3 kDa were prepared by cellulase degradation of chitosan (300 kDa) and ultrafiltration techniques. We examined the correlation between activity against Escherichia coli and Staphylococcus aureus and chitosan MW, and provided the underlying explanation. In acidic pH conditions, the chitosan activity increased with increasing MW, irrespective of the temperature and bacteria tested. However, at neutral pH, chitosan activity increased as the MW decreased, and little activity was observed for chitosans with MW >29.2 kDa. At pH 5.0 and 6.0, chitosans exhibited good water solubility and zeta potential (ZP) decreased with the MW, whereas the solubility and ZP of the chitosans decreased with increasing MW at pH 7.0. Particularly, low solubility and negative ZP values were determined for chitosans with MW >29.2 kDa, which may explain the loss of their antibacterial activity at pH 7.0.
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Affiliation(s)
- Shun-Hsien Chang
- Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Hong-Ting Victor Lin
- Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan, ROC; Center for Marine Bioenvironment and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan, ROC
| | - Guan-James Wu
- Department of Food Science, National Penghu University of Science and Technology, Penghu, Taiwan, ROC
| | - Guo Jane Tsai
- Department of Food Science, National Taiwan Ocean University, Keelung, Taiwan, ROC; Center for Marine Bioenvironment and Biotechnology, National Taiwan Ocean University, Keelung, Taiwan, ROC.
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58
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Zimoch-Korzycka A, Gardrat C, Castellan A, Coma V, Jarmoluk A. The use of lysozyme to prepare biologically active chitooligomers. POLIMEROS 2015. [DOI: 10.1590/0104-1428.1630] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Anna Zimoch-Korzycka
- Université de Bordeaux, France; Wroclaw University of Environmental and Life Sciences, Poland
| | - Christian Gardrat
- Université de Bordeaux, France; Centre National de la Recherche Scientifique, France
| | - Alain Castellan
- Université de Bordeaux, France; Centre National de la Recherche Scientifique, France
| | - Véronique Coma
- Université de Bordeaux, France; Centre National de la Recherche Scientifique, France
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59
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Tian M, Tan H, Li H, You C. Molecular weight dependence of structure and properties of chitosan oligomers. RSC Adv 2015. [DOI: 10.1039/c5ra08358c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Molecular weight dependence of water solubility of COS.
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Affiliation(s)
- Meng Tian
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
| | - Hong Tan
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu
- PR China
| | - Hao Li
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
| | - Chao You
- Department of Neurosurgery
- West China Hospital
- Sichuan University
- Chengdu
- PR China
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60
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Menendez E, Garcia-Fraile P, Rivas R. Biotechnological applications of bacterial cellulases. AIMS BIOENGINEERING 2015. [DOI: 10.3934/bioeng.2015.3.163] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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61
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Dan G, Zhang ZH, Zeng XA, Han Z, Luo WB, Tang C, Quek SY. Synergetic Effects of Pulsed Electric Field and Ozone Treatments on the Degradation of High Molecular Weight Chitosan. INTERNATIONAL JOURNAL OF FOOD ENGINEERING 2014. [DOI: 10.1515/ijfe-2014-0100] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A synergetic method integrating both pulsed electric field (PEF) and ozone treatment was developed as a novel approach to investigate the degradation of high molecular weight chitosan (Mw=4.5×105 Da). A device integrating both components was designed and assembled for the experiments. Results showed that the highest degradation percentage of chitosan was achieved with PEF/ozone co-treatment generated at experimental conditions of 1.2 L/min of ozone flow rate, 100 mL/min of 0.6% (w/v) chitosan solution flow rate, and 26.7 kV/cm of PEF intensity. The degradation percentage after 60 min PEF treatment was 24.89%, whereas it was improved to 94.89% by ozone treatment for 60 min. Combining the two treatments resulted in enhanced degradation percentage of 99.56%, with low molecular weights sample (Mw<2,500 Da) obtained. FTIR analysis demonstrated that the amide structure of the degradation products was minimally affected by the co-treatment. XRD pattern indicated that the crystallinity of the degradation products decreased. In addition, it could complete dissolve in water after 60 min PEF/ozone co-treatment. These results demonstrated the synergetic PEF/ozone co-treatment as an effective method for degradation of high molecular weight chitosan.
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62
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Dong H, Wang Y, Zhao L, Zhou J, Xia Q, Jiang L, Fan L. Purification of DP 6 to 8 chitooligosaccharides by nanofiltration from the prepared chitooligosaccharides syrup. BIORESOUR BIOPROCESS 2014. [DOI: 10.1186/s40643-014-0020-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Chitooligosaccharides (COS) with degrees of polymerization (DP) 6 to 8 are degraded from chitosan, which possess excellent bioactivities. However, technologies that could purify them from hydrolysis mixtures in the narrow DP range (984 to 1,306 Da) are absent. The objective of this research is to purify DP 6 to 8 COS by nanofiltration on the basis of appropriate adjustments of the feed condition.
Methods
Syrup containing DP 6 to 8 COS at different concentrations (19.0 to 46.7 g/L) was prepared. A commercial membrane (QY-5-NF-1812) negatively charged was applied. Experiments were carried out in full recycle mode, so that the observed COS retentions were investigated at various transmembrane pressures (6.0 to 20.0 bar), temperatures (10°C to 50°C), and pHs (5.0 to 9.0). Then, the feasibility of separation of DP 6 to 8 COS was further studied by concentration ratio under optimum conditions.
Results
The results indicate that the purification of DP 6 to 8 COS by nanofiltration NF is feasible. It was found that the permeate flux was 95.0 L/(m2 h) at 10.0 bar, while it reached to 140.0 L/(m2 h) at 20.0 bar, and it increased with feed temperature, but the membrane pores were also swelled by heating and led to an irreversible wastage of target oligomers. Additionally, the retention behaviors of chitooligosaccharides are significantly influenced by pH.
Conclusions
Although glucosamine and dimer were permeatable at low pH, their retention ratios were remarkably varied from 0.458 to 0.864 when pH was 9.0. With the interaction of hydrogen bonds, structural curling and overlapping of chitooligosaccharides were formed. Consequently, the rejection of chitooligosaccharides at various pHs is variable. Spray-dried products were finally characterized by the matrix-assisted laser desorption/ionization time-of-flight mass spectrum. The spectrum identified the distributions of hexamer, heptamer, and octamer. Combined with high-performance liquid chromatography profiles, the purity and yield of DP 6 to 8 chitooligosaccharides were up to 82.2% and 73.9%, respectively.
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63
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Dong H, Wang Y, Zhao L, Zhou J, Xia Q, Qiu Y. Key Technologies of Enzymatic Preparation for DP 6-8 Chitooligosaccharides. J FOOD PROCESS ENG 2014. [DOI: 10.1111/jfpe.12159] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huizhong Dong
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
| | - Yaosong Wang
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
| | - Liming Zhao
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
| | - Jiachun Zhou
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
| | - Quanming Xia
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
| | - Yongjun Qiu
- State Key Laboratory of Bioreactor Engineering; R&D Center of Separation and Extraction Technology in Fermentation Industry; East China University of Science and Technology; Shanghai 200237 China
- Shanghai Collaborative Innovation Center for Biomanufacturing Technology; Shanghai China
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64
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In vitro inhibitory effect of crab shell extract on human umbilical vein endothelial cell. In Vitro Cell Dev Biol Anim 2014; 51:36-41. [DOI: 10.1007/s11626-014-9810-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 08/13/2014] [Indexed: 01/14/2023]
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65
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Lorkowska-Zawicka B, Kamiński K, Ciejka J, Szczubiałka K, Białas M, Okoń K, Adamek D, Nowakowska M, Jawień J, Olszanecki R, Korbut R. Inactivation of heparin by cationically modified chitosan. Mar Drugs 2014; 12:3953-69. [PMID: 24983639 PMCID: PMC4113808 DOI: 10.3390/md12073953] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 05/13/2014] [Accepted: 05/16/2014] [Indexed: 11/17/2022] Open
Abstract
This study was performed to evaluate the ability of N-(2-hydroxypropyl)-3-tri methylammonium chitosan chloride (HTCC), the cationically modified chitosan, to form biologically inactive complexes with unfractionated heparin and thereby blocking its anticoagulant activity. Experiments were carried out in rats in vivo and in vitro using the activated partial thromboplastin time (APTT) and prothrombin time (PT) tests for evaluation of heparin anticoagulant activity. For the first time we have found that HTCC effectively neutralizes anticoagulant action of heparin in rat blood in vitro as well as in rats in vivo. The effect of HTCC on suppression of heparin activity is dose-dependent and its efficacy can be comparable to that of protamine-the only agent used in clinic for heparin neutralization. HTCC administered i.v. alone had no direct effect on any of the coagulation tests used. The potential adverse effects of HTCC were further explored using rat experimental model of acute toxicity. When administered i.p. at high doses (250 and 500 mg/kg body weight), HTCC induced some significant dose-dependent structural abnormalities in the liver. However, when HTCC was administered at low doses, comparable to those used for neutralization of anticoagulant effect of heparin, no histopathological abnormalities in liver were observed.
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Affiliation(s)
- Barbara Lorkowska-Zawicka
- Chair of Pharmacology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Kamil Kamiński
- Faculty of Chemistry, Jagiellonian University, 3 Ingardena Str., Cracow 30-060, Poland.
| | - Justyna Ciejka
- Faculty of Chemistry, Jagiellonian University, 3 Ingardena Str., Cracow 30-060, Poland.
| | - Krzysztof Szczubiałka
- Faculty of Chemistry, Jagiellonian University, 3 Ingardena Str., Cracow 30-060, Poland.
| | - Magdalena Białas
- Department of Pathomorphology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Krzysztof Okoń
- Department of Pathomorphology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Dariusz Adamek
- Department of Pathomorphology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Maria Nowakowska
- Faculty of Chemistry, Jagiellonian University, 3 Ingardena Str., Cracow 30-060, Poland.
| | - Jacek Jawień
- Chair of Pharmacology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Rafał Olszanecki
- Chair of Pharmacology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
| | - Ryszard Korbut
- Chair of Pharmacology, Jagiellonian University Medical College, 16 Grzegórzecka Str., Cracow 31-531, Poland.
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66
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Medvecky L, Giretova M, Stulajterova R. Properties and in vitro characterization of polyhydroxybutyrate-chitosan scaffolds prepared by modified precipitation method. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:777-789. [PMID: 24297513 DOI: 10.1007/s10856-013-5105-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 11/22/2013] [Indexed: 06/02/2023]
Abstract
Porous polyhydroxybutyrate (PHB)-chitosan biopolymer scaffolds were prepared by co-precipitation from biopolymer solutions with propylene carbonate and acetic acid as solvents. A change of the fibrous character of chitosan precipitates to globular shaped forms with a polyhydroxybutyrate addition was found in suspensions. Scaffolds differ by porosity and morphology of polymers in microstructures, while chitosan represented more compact plate-like fibers and PHB characterized mainly fine fibrous globular agglomerates. Two structurally dissimilar phase regions were verified in blended scaffolds. A rise in the number of smaller pores, and fine structured polymer forms with PHB content were observed in the scaffolds. A significant reduction in the average molecular weight of biopolymers was found in pure chitosan scaffold, this after precipitation of the chitosan in the presence of propylene carbonate and in blends after mutual biopolymer mixing. Interactions between shortened chitosan chains, PHB and chitosan biopolymers in the blends were observed. An excellent fibroblast proliferation was found in scaffolds prepared from biopolymer blends.
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Affiliation(s)
- Lubomir Medvecky
- Institute of Materials Research, Slovak Academy of Science, Watsonova 47, 040 01, Kosice, Slovak Republic,
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67
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Kulikov SN, Lisovskaya SA, Zelenikhin PV, Bezrodnykh EA, Shakirova DR, Blagodatskikh IV, Tikhonov VE. Antifungal activity of oligochitosans (short chain chitosans) against some Candida species and clinical isolates of Candida albicans: molecular weight-activity relationship. Eur J Med Chem 2013; 74:169-78. [PMID: 24462847 DOI: 10.1016/j.ejmech.2013.12.017] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 12/13/2013] [Accepted: 12/18/2013] [Indexed: 10/25/2022]
Abstract
A series of oligochitosans (short chain chitosans) prepared by acidic hydrolysis of chitosan and characterized by their molecular weight, polydispersity and degree of deacetylation were used to determine their anticandidal activities. This study has demonstrated that oligochitosans show a high fungistatic activity (MIC 8-512 μg/ml) against Candida species and clinical isolates of Candida albicans, which are resistant to a series of classic antibiotics. Flow cytometry analysis showed that oligochitosan possessed a high fungicidal activity as well. For the first time it was shown that even sub-MIC oligochitosan concentration suppressed the formation of C. albicans hyphal structures, cause severe cell wall alterations, and altered internal cell structure. These results indicate that oligochitosan should be considered as a possible alternative/additive to known anti-yeast agents in pharmaceutical compositions.
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Affiliation(s)
- Sergey N Kulikov
- Kazan Scientific Research Institute of Epidemiology and Microbiology, Bolshaya Krasnaya St. 67, Kazan 420015, Russia
| | - Svetlana A Lisovskaya
- Kazan Scientific Research Institute of Epidemiology and Microbiology, Bolshaya Krasnaya St. 67, Kazan 420015, Russia
| | | | - Evgeniya A Bezrodnykh
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St. 28, Moscow 119991, Russia
| | - Diana R Shakirova
- Kazan Federal University, Kremlyovskaya St. 18, Kazan 420008, Russia
| | - Inesa V Blagodatskikh
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St. 28, Moscow 119991, Russia
| | - Vladimir E Tikhonov
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov St. 28, Moscow 119991, Russia.
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68
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Abu Naim A, Umar A, Sanagi MM, Basaruddin N. Chemical modification of chitin by grafting with polystyrene using ammonium persulfate initiator. Carbohydr Polym 2013; 98:1618-23. [DOI: 10.1016/j.carbpol.2013.07.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 07/22/2013] [Accepted: 07/23/2013] [Indexed: 10/26/2022]
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69
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Pavinatto A, Souza AL, Delezuk JAM, Pavinatto FJ, Campana-Filho SP, Oliveira ON. Interaction of O-acylated chitosans with biomembrane models: probing the effects from hydrophobic interactions and hydrogen bonding. Colloids Surf B Biointerfaces 2013; 114:53-9. [PMID: 24161506 DOI: 10.1016/j.colsurfb.2013.09.034] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 09/10/2013] [Accepted: 09/17/2013] [Indexed: 11/19/2022]
Abstract
One of the major challenges in establishing the mechanisms responsible for the chitosan action in biomedical applications lies in the determination of the molecular-level interactions with the cell membrane. In this study, we probed hydrophobic interactions and H-bonding in experiments with O,O'-diacetylchitosan (DACT) and O,O'-dipropionylchitosan (DPPCT) incorporated into monolayers of distinct phospholipids, the zwitterionic dipalmitoyl phosphatidyl choline (DPPC), and the negatively charged dipalmitoyl phosphatidyl glycerol (DPPG) and dimyristoyl phosphatidic acid (DMPA). The importance of hydrophobic interactions was confirmed with the larger effects observed for DACT and DPPCT than for parent chitosan (Chi), particularly for the more hydrophobic DPPCT. Such larger effects were noted in surface pressure isotherms and elasticity of the monolayers. Since H-bonding is hampered for the chitosan derivatives, which have part of their hydroxyl groups shielded by O-acylation, these effects indicate that H-bonding does not play an important role in the chitosan-membrane interactions. Using polarization-modulated infrared reflection absorption (PM-IRRAS) spectroscopy, we found that the chitosan derivatives were incorporated into the hydrophobic chain of the phospholipids, even at high surface pressures comparable to those in a real cell membrane. Taken together, these results indicate that the chitosan derivatives containing hydrophobic moieties would probably be more efficient than parent chitosan as antimicrobial agents, where interaction with the cell membrane is crucial.
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Affiliation(s)
- Adriana Pavinatto
- Institute of Chemistry of São Carlos, USP, PO Box 780, 13560-970 São Carlos, SP, Brazil.
| | - Adriano L Souza
- Institute of Physics of São Carlos, USP, PO Box 369, 13566-590 São Carlos, SP, Brazil
| | - Jorge A M Delezuk
- Institute of Physics of São Carlos, USP, PO Box 369, 13566-590 São Carlos, SP, Brazil
| | - Felippe J Pavinatto
- Institute of Physics of São Carlos, USP, PO Box 369, 13566-590 São Carlos, SP, Brazil
| | | | - Osvaldo N Oliveira
- Institute of Physics of São Carlos, USP, PO Box 369, 13566-590 São Carlos, SP, Brazil
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70
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Klinkesorn U. The Role of Chitosan in Emulsion Formation and Stabilization. FOOD REVIEWS INTERNATIONAL 2013. [DOI: 10.1080/87559129.2013.818013] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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71
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Jung J, Zhao Y. Impact of the structural differences between α- and β-chitosan on their depolymerizing reaction and antibacterial activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:8783-9. [PMID: 23909640 DOI: 10.1021/jf4018965] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The polymeric structure characteristics of β-chitosan from jumbo squid (Dosidicus gigas) pens and α-chitosan from shrimp shells during depolymerization by cellulase hydrolysis at different degrees of deacetylation (DDA) (60, 75, and 90%) were investigated by using Fourier transform infrared spectroscopy and X-ray diffraction. Antibacterial activity of β-chitosan against Escherichia coli and Listeria innocua was compared with that of α-chitosan at similar Mw and degrees of deacetylation (DDA) by studying inhibition ratio and minimal inhibition concentration (MIC) and was coordinated with the structural characteristics of the two forms of chitosan. β-Chitosan was more reactive to cellulase hydrolysis than α-chitosan due to its relatively lower crystallinity (CI) and loose crystal property, and the 75% DDA chitosan was more susceptible to cellulase than the 90% DDA ones with the 75% DDA of β-chitosan mostly reactive. Both forms of chitosan showed more inhibition against E. coli than against L. innocua, and no difference against L. innocua between the two forms of chitosan was observed. However, the two forms of chitosan exhibited different levels of antibacterial activity against E. coli, in which 75% DDA/31 kDa β-chitosan demonstrated significantly higher inhibition (lower MIC) than that of 75% DDA/31 kDa α-chitosan, whereas 90% DDA/74-76 kDa α-chitosan had a higher inhibition ratio than that of 90% DDA/74-76 kDa of β-chitosan. This result may be explained by the impact of the different structural properties between α- and β-chitosan on chitosan conformations in the solution. This study provided new information about the biological activities of β-chitosan, a bioactive compound with unique functionalities and great potential for food and other applications.
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Affiliation(s)
- Jooyeoun Jung
- Department of Food Science & Technology, Oregon State University , Corvallis, Oregon 97331-6602, United States
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72
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Synthesis and antifungal activity of thiadiazole-functionalized chitosan derivatives. Carbohydr Res 2013; 373:103-7. [DOI: 10.1016/j.carres.2013.03.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2012] [Revised: 02/22/2013] [Accepted: 03/01/2013] [Indexed: 01/19/2023]
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73
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Su P, Wang S, Shi Y, Yang Y. Application of cellulase-polyamidoamine dendrimer-modified silica for microwave-assisted chitosan enzymolysis. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.03.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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74
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Pavinatto A, Pavinatto FJ, Delezuk JADM, Nobre TM, Souza AL, Campana-Filho SP, Oliveira ON. Low molecular-weight chitosans are stronger biomembrane model perturbants. Colloids Surf B Biointerfaces 2013; 104:48-53. [DOI: 10.1016/j.colsurfb.2012.11.047] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 11/26/2012] [Accepted: 11/27/2012] [Indexed: 11/28/2022]
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75
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Homogeneous synthesis of chitin-based acrylate superabsorbents in NaOH/urea solution. Carbohydr Polym 2013; 94:261-71. [DOI: 10.1016/j.carbpol.2013.01.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Revised: 01/02/2013] [Accepted: 01/08/2013] [Indexed: 11/23/2022]
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76
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Chen LC, Chiang WD, Chen WC, Chen HH, Huang YW, Chen WJ, Lin SB. Influence of alanine uptake on Staphylococcus aureus surface charge and its susceptibility to two cationic antibacterial agents, nisin and low molecular weight chitosan. Food Chem 2012; 135:2397-403. [DOI: 10.1016/j.foodchem.2012.06.122] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Revised: 05/09/2012] [Accepted: 06/21/2012] [Indexed: 02/07/2023]
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77
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Dhillon GS, Kaur S, Brar SK, Verma M. Green synthesis approach: extraction of chitosan from fungus mycelia. Crit Rev Biotechnol 2012; 33:379-403. [PMID: 23078670 DOI: 10.3109/07388551.2012.717217] [Citation(s) in RCA: 117] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Chitosan, copolymer of glucosamine and N-acetyl glucosamine is mainly derived from chitin, which is present in cell walls of crustaceans and some other microorganisms, such as fungi. Chitosan is emerging as an important biopolymer having a broad range of applications in different fields. On a commercial scale, chitosan is mainly obtained from crustacean shells rather than from the fungal sources. The methods used for extraction of chitosan are laden with many disadvantages. Alternative options of producing chitosan from fungal biomass exist, in fact with superior physico-chemical properties. Researchers around the globe are attempting to commercialize chitosan production and extraction from fungal sources. Chitosan extracted from fungal sources has the potential to completely replace crustacean-derived chitosan. In this context, the present review discusses the potential of fungal biomass resulting from various biotechnological industries or grown on negative/low cost agricultural and industrial wastes and their by-products as an inexpensive source of chitosan. Biologically derived fungal chitosan offers promising advantages over the chitosan obtained from crustacean shells with respect to different physico-chemical attributes. The different aspects of fungal chitosan extraction methods and various parameters having an effect on the yield of chitosan are discussed in detail. This review also deals with essential attributes of chitosan for high value-added applications in different fields.
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78
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Immobilization of a protease on modified chitosan beads for the depolymerization of chitosan. Carbohydr Polym 2012. [DOI: 10.1016/j.carbpol.2011.11.062] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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79
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Molecular weight and pH aspects of the efficacy of oligochitosan against methicillin-resistant Staphylococcus aureus (MRSA). Carbohydr Polym 2012; 87:545-550. [DOI: 10.1016/j.carbpol.2011.08.017] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 08/08/2011] [Accepted: 08/08/2011] [Indexed: 11/21/2022]
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80
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Chitooligosaccharides as Potential Nutraceuticals. MARINE MEDICINAL FOODS - IMPLICATIONS AND APPLICATIONS - ANIMALS AND MICROBES 2012; 65:321-36. [DOI: 10.1016/b978-0-12-416003-3.00021-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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81
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Ai H, Wang F, Xia Y, Chen X, Lei C. Antioxidant, antifungal and antiviral activities of chitosan from the larvae of housefly, Musca domestica L. Food Chem 2011; 132:493-8. [PMID: 26434321 DOI: 10.1016/j.foodchem.2011.11.033] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 09/13/2011] [Accepted: 11/07/2011] [Indexed: 10/15/2022]
Abstract
Antioxidant activity of the chitosan from the larvae of Musca domestica L. was evaluated in two different reactive oxygen species assays, and inhibitory effects against seven fungi were also tested. The results showed that the chitosan had scavenging activity for hydroxyl and superoxide radicals which were similar to that of ascorbic acid. Also the chitosan exhibited excellent antifungal activity, especially in the low concentration, it could significantly inhibit the growth of Rhizopus stolonifer. Besides, antiviral results demonstrated that the chitosan could effectively inhibit the infection of AcMNPV and BmNPV. These results suggested that the chitosan from the larvae of housefly could be effectively used as a natural antioxidant to protect the human body from free radicals and retard the progress of many chronic diseases. Furthermore, the chitosan with antiviral and antifungal activity might provide useful information for antiviral breeding technology of economic insect and development of plant pathological control.
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Affiliation(s)
- Hui Ai
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Science, Huazhong Normal University, Wuhan 430079, PR China; Key Laboratory of Insect Resource Utilization & Sustainable Pest Management of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Furong Wang
- Key Laboratory of Insect Resource Utilization & Sustainable Pest Management of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Yuqian Xia
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Science, Huazhong Normal University, Wuhan 430079, PR China
| | - Xiaomin Chen
- Key Laboratory of Insect Resource Utilization & Sustainable Pest Management of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Chaoliang Lei
- Key Laboratory of Insect Resource Utilization & Sustainable Pest Management of Hubei Province, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, PR China.
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82
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Tahtat D, Mahlous M, Benamer S, Nacer Khodja A, Larbi Youcef S, Hadjarab N, Mezaache W. Influence of some factors affecting antibacterial activity of PVA/Chitosan based hydrogels synthesized by gamma irradiation. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:2505-2512. [PMID: 21870082 DOI: 10.1007/s10856-011-4421-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 08/10/2011] [Indexed: 05/31/2023]
Abstract
Poly (vinyl alcohol) hydrogels containing different concentrations of chitosan with molecular weight of 471 and 101 kDa were crosslinked by gamma irradiation at a dose of 25 kGy. The swelling behavior, gel content and morphological structure of the blend were investigated. The antibacterial effect, as a function of chitosan content and molecular weight in the hydrogel, was investigated against Escherichia coli and Bacillus subtilis. With increasing chitosan content the equilibrium degree of swelling of the blend increased and the gel fraction decreased. Results of antibacterial activity of chitosan revealed that chitosan was more effective in inhibiting growth of gram positive bacteria than that of gram negative ones. It was observed that, the chitosan content as well as its molecular weight has a direct influence on bacteria growth inhibition. The higher the chitosan content in the blend and the higher its initial molecular weight, the larger was the inhibition zone diameter. The bacteria growth inhibition was attributed to the diffusion of entrapped chitosan from the hydrogel blend to the culture medium.
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Affiliation(s)
- Djamel Tahtat
- Department of Irradiation Technology, Nuclear Research Center of Algiers, BP-399, Algiers, Algeria.
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83
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Kopparapu NK, Liu Z, Yan Q, Jiang Z, Zhang S. A novel thermostable chitinase (PJC) from pomegranate (Punica granatum) juice. Food Chem 2011. [DOI: 10.1016/j.foodchem.2011.02.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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84
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Mourya VK, Inamdar NN, Choudhari YM. Chitooligosaccharides: Synthesis, characterization and applications. POLYMER SCIENCE SERIES A 2011. [DOI: 10.1134/s0965545x11070066] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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85
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Cook KL, Rothrock MJ, Eiteman MA, Lovanh N, Sistani K. Evaluation of nitrogen retention and microbial populations in poultry litter treated with chemical, biological or adsorbent amendments. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2011; 92:1760-1766. [PMID: 21371808 DOI: 10.1016/j.jenvman.2011.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 01/10/2011] [Accepted: 02/06/2011] [Indexed: 05/30/2023]
Abstract
Poultry litter is a valuable nutrient source for crop production. Successful management to reduce ammonia and its harmful side-effects on poultry and the environment can be aided by the use of litter amendments. In this study, three acidifiers, two biological treatments, one chemical urease inhibitor and two adsorber amendments were added to poultry litter. Chemical, physical and microbiological properties of the litters were assessed at the beginning and the end of the experiment. Application of litter amendments consistently reduced organic N loss (0-15%) as compared to unamended litter (20%). Acidifiers reduced nitrogen loss through both chemical and microbiological processes. Adsorbent amendments (water treatment residuals and chitosan) reduced nitrogen loss and concentrations of ammonia-producing bacteria and fungi. The use of efficient, cost-effective litter amendments to maximum agronomic, environmental and financial benefits is essential for the future of sustainable poultry production.
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Affiliation(s)
- Kimberly L Cook
- USDA-ARS, Animal Waste Management Research Unit, 230 Bennett Lane, Bowling Green, KY 42104, USA.
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86
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Jung J, Zhao Y. Characteristics of deacetylation and depolymerization of β-chitin from jumbo squid (Dosidicus gigas) pens. Carbohydr Res 2011; 346:1876-84. [PMID: 21700271 DOI: 10.1016/j.carres.2011.05.021] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2011] [Revised: 05/13/2011] [Accepted: 05/18/2011] [Indexed: 10/18/2022]
Abstract
This study evaluated the deacetylation characteristics of β-chitin from jumbo squid (Dosidicus gigas) pens by using strongly alkaline solutions of NaOH or KOH. Taguchi design was employed to investigate the effect of reagent concentration, temperature, time, and treatment step on molecular mass (MM) and degree of deacetylation (DDA) of the chitosan obtained. The optimal treatment conditions for achieving high MM and DDA of chitosan were identified as: 40% NaOH at 90°C for 6h with three separate steps (2h+2h+2h) or 50% NaOH at 90°C for 6h with one step, or 50% KOH at 90°C for 4h with three steps (1h+1h+2h) or 6h with one step. The most important factor affecting DDA and MM was temperature and time, respectively. The chitosan obtained was then further depolymerized by cellulase or lysozyme with cellulase giving a higher degradation ratio, lower relative viscosity, and a larger amount of reducing-end formations than that of lysozyme due to its higher susceptibility. This study demonstrated that jumbo squid pens are a good source of materials to produce β-chitosan with high DDA and a wide range of MM for various potential applications.
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Affiliation(s)
- Jooyeoun Jung
- Department of Food Science and Technology, Oregon State University, Corvallis, OR 97331-6602, USA
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87
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88
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Park BK, Kim MM. Applications of chitin and its derivatives in biological medicine. Int J Mol Sci 2010; 11:5152-64. [PMID: 21614199 PMCID: PMC3100826 DOI: 10.3390/ijms11125152] [Citation(s) in RCA: 258] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 12/02/2010] [Accepted: 12/06/2010] [Indexed: 02/07/2023] Open
Abstract
Chitin and its derivatives-as a potential resource as well as multiple functional substrates-have generated attractive interest in various fields such as biomedical, pharmaceutical, food and environmental industries, since the first isolation of chitin in 1811. Moreover, chitosan and its chitooligosaccharides (COS) are degraded products of chitin through enzymatic and acidic hydrolysis processes; and COS, in particular, is well suited for potential biological application, due to the biocompatibility and nontoxic nature of chitosan. In this review, we investigate the current bioactivities of chitin derivatives, which are all correlated with their biomedical properties. Several new and cutting edge insights here may provide a molecular basis for the mechanism of chitin, and hence may aid its use for medical and pharmaceutical applications.
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Affiliation(s)
- Bae Keun Park
- Institute of Basic Medical Science, Yonsei University Wonju College of Medicine, Wonju 220-701, Korea; E-Mail:
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89
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Optimization of Chitosanase Production by Trichoderma koningii sp. Under Solid-State Fermentation. FOOD BIOPROCESS TECH 2010. [DOI: 10.1007/s11947-010-0479-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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90
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Chen LC, Kung SK, Chen HH, Lin SB. Evaluation of zeta potential difference as an indicator for antibacterial strength of low molecular weight chitosan. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.06.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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91
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Liu T, Li B, Zheng X, Liang S, Song X, Zhu B, Kennedy JF, Xia J. Effects of freezing on the condensed state structure of chitin in alkaline solution. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.05.047] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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92
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The antimicrobial action of low-molar-mass chitosan, chitosan derivatives and chitooligosaccharides on bifidobacteria. Folia Microbiol (Praha) 2010; 55:379-82. [PMID: 20680576 DOI: 10.1007/s12223-010-0063-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2010] [Revised: 04/14/2010] [Indexed: 01/01/2023]
Abstract
The crude fractions of chitooligosaccharides (COS) and low-molar-mass chitosans (LMWC) were prepared by enzyme hydrolysis of chitosan (CS). Specific growth rate of B. adolescentis, B. bifidum, B. breve, B. catenulatum, B. infantis and B. longum ssp. longum was determined in the presence of 0.025 and 0.5 % COS (<5 kDa), LMWC (5-10 kDa), and 0.025, 0.1 and 0.5% of CS, chitosan succinate and chitosan glutamate in vitro. Minimum inhibitory concentrations (MIC; assayed by colony counting on TPY agar plates) of COS-LMWC and CS ranged from 0.025% to 0.75% of CS-LMWC. The growth of all bifidobacterial strains in the presence of chitosan, its derivatives and LMWC decreased at a concentration of 0.025%; the bacterial growth was completely inhibited at a concentration of 0.5%. COS did not show any inhibitory effect, an increased growth rate was even observed in the case of B. bifidum, B. catenulatum and B. infantis.
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93
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Zhou X, Liu D, Liu H, Yang Q, Yao K, Wang X, Wang L, Yang X. Effect of Low Molecular Weight Chitosans on Drug Permeation through Mouse Skin: 1. Transdermal Delivery of Baicalin. J Pharm Sci 2010; 99:2991-8. [DOI: 10.1002/jps.22063] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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94
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Zhang J, Xia W, Liu P, Cheng Q, Tahirou T, Gu W, Li B. Chitosan modification and pharmaceutical/biomedical applications. Mar Drugs 2010; 8:1962-87. [PMID: 20714418 PMCID: PMC2920537 DOI: 10.3390/md8071962] [Citation(s) in RCA: 297] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 05/29/2010] [Accepted: 06/09/2010] [Indexed: 11/23/2022] Open
Abstract
Chitosan has received much attention as a functional biopolymer for diverse applications, especially in pharmaceutics and medicine. Our recent efforts focused on the chemical and biological modification of chitosan in order to increase its solubility in aqueous solutions and absorbability in the in vivo system, thus for a better use of chitosan. This review summarizes chitosan modification and its pharmaceutical/biomedical applications based on our achievements as well as the domestic and overseas developments: (1) enzymatic preparation of low molecular weight chitosans/chitooligosaccharides with their hypocholesterolemic and immuno-modulating effects; (2) the effects of chitin, chitosan and their derivatives on blood hemostasis; and (3) synthesis of a non-toxic ion ligand--D-Glucosaminic acid from oxidation of D-Glucosamine for cancer and diabetes therapy.
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Affiliation(s)
- Jiali Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
- School of Medicine and Pharmaceutics, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Wenshui Xia
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Ping Liu
- Jiangsu Animal Husbandry and Veterinary College, Taizhou 225300, Jiangsu, China
| | - Qinyuan Cheng
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Talba Tahirou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
| | - Wenxiu Gu
- School of Chemical Engineering, Jiangnan University, Wuxi 214122, China
| | - Bo Li
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, Jiangsu, China
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