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Facchinatto WM, Fiamingo A, dos Santos DM, Campana-Filho SP. Characterization and physical-chemistry of methoxypoly(ethylene glycol)-g-chitosan. Int J Biol Macromol 2019; 124:828-837. [DOI: 10.1016/j.ijbiomac.2018.11.246] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 11/23/2018] [Accepted: 11/26/2018] [Indexed: 12/14/2022]
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2
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Zhang X, Cheng L, Feng L, Peng Y, Zhou Z, Yin G, Li W, Zhang A. Thermoresponsive dendronized chitosan-based hydrogels as injectable stem cell carriers. Polym Chem 2019. [DOI: 10.1039/c9py00256a] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combination of dendronization and Schiff-base chemistry endows injectable chitosan hydrogels with thermoresponsiveness, self-healing abilities and enhanced mechanical properties under physiological conditions.
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Affiliation(s)
- Xiacong Zhang
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
| | - Lin Cheng
- Department of Orthopaedics
- The First Affiliated Hospital of Nanjing Medical University
- Nanjing 210029
- China
| | - Letian Feng
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
| | - Yu Peng
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
| | - Zhimin Zhou
- Department of Orthopaedics
- The First Affiliated Hospital of Nanjing Medical University
- Nanjing 210029
- China
| | - Guoyong Yin
- Department of Orthopaedics
- The First Affiliated Hospital of Nanjing Medical University
- Nanjing 210029
- China
| | - Wen Li
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
| | - Afang Zhang
- Laboratory of Polymer Chemistry
- Department of Polymer Materials
- College of Materials Science and Engineering
- Shanghai University
- Shanghai 200444
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3
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Xiang L, Gong L, Zhang J, Zhang L, Hu W, Wang W, Lu Q, Zeng H. Probing molecular interactions of PEGylated chitosan in aqueous solutions using a surface force apparatus. Phys Chem Chem Phys 2019; 21:20571-20581. [DOI: 10.1039/c9cp03189h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effects of contact time, solution pH and PEGylation degree on the non-covalent interaction behavior of chitosan are systematically investigated.
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Affiliation(s)
- Li Xiang
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Lu Gong
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Jiawen Zhang
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Ling Zhang
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Wenjihao Hu
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Wenda Wang
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Qingye Lu
- Department of Chemical and Petroleum Engineering
- University of Calgary
- Calgary
- Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
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4
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Anticancer Activity of Chitosan, Chitosan Derivatives, and Their Mechanism of Action. Int J Biomater 2018; 2018:2952085. [PMID: 30693034 PMCID: PMC6332982 DOI: 10.1155/2018/2952085] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 11/26/2018] [Accepted: 12/04/2018] [Indexed: 12/15/2022] Open
Abstract
Tailoring of chitosan through the involvement of its amino, acetamido, and hydroxy groups can give derivatives of enhanced solubility and remarkable anticancer activity. The general mechanism of such activity is associated with the disturbances in normal functioning of cell cycle, interference to the central dogma of biological system from DNA to RNA to protein or enzymatic synthesis, and the disruption of hormonal path to biosynthesis to inhibit the growth of cancer cells. Both chitosan and its various derivatives have been reported to selectively permeate through the cancer cell membranes and show anticancer activity through the cellular enzymatic, antiangiogenic, immunoenhancing, antioxidant defense mechanism, and apoptotic pathways. They get sequestered from noncancer cells and provide their enhanced bioavailability in cancer cells in a sustained release manner. This review presents the putative mechanisms of anticancer activity of chitosan and mechanistic approaches of structure activity relation upon the modification of chitosan through functionalization, complex formation, and graft copolymerization to give different derivatives.
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Pandian S, Jeevanesan V, Ponnusamy C, Natesan S. RES-loaded pegylated CS NPs: for efficient ocular delivery. IET Nanobiotechnol 2017; 11:32-39. [PMID: 28476958 DOI: 10.1049/iet-nbt.2016.0069] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The objective of this study is to develop resveratrol (RES) loaded polyethylene glycols (PEGs) modified chitosan (CS) nanoparticles (NPs) by ionic gelation method for the treatment of glaucoma. While increasing the concentration of PEG, the particle size and polydispersity index of the formulations increased. Entrapment efficiency and RES loading (RL) of NPs decreased while increasing PEG concentration. The in vitro release of NPs showed an initial burst release of RES (45%) followed by controlled release. Osmolality of formulations revealed that the prepared NPs were iso-osmolar with the tear. Ocular tolerance of the NPs was evaluated using hen's egg test on the chorioallantoic membrane and it showed that the NPs were non-irritant. RES-loaded PEG-modified CS NPs shows an improved corneal permeation compared with RES dispersion. Fluorescein isothiocyanate loaded CS NPs accumulated on the surface of the cornea but the PEG-modified CS NPs crossed the cornea and reached retinal choroid. RES-loaded PEG-modified CS NPs reduced the intra-ocular pressure (IOP) by 4.3 ± 0.5 mmHg up to 8 h in normotensive rabbits. These results indicate that the developed NPs have efficient delivery of RES to the ocular tissues and reduce the IOP for the treatment of glaucoma.
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Affiliation(s)
- Saravanakumar Pandian
- Laboratory for Lipid Based Systems, Department of Pharmaceutical Technology, BIT Campus, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India
| | - Vinoth Jeevanesan
- Laboratory for Lipid Based Systems, Department of Pharmaceutical Technology, BIT Campus, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India
| | - Chandrasekar Ponnusamy
- Laboratory for Lipid Based Systems, Department of Pharmaceutical Technology, BIT Campus, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India
| | - Subramanian Natesan
- Laboratory for Lipid Based Systems, Department of Pharmaceutical Technology, BIT Campus, Anna University, Tiruchirappalli 620 024, Tamil Nadu, India.
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6
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Basumallick S, Gabriela Nogueira Campos M, Richardson D, Gesquiere A, Santra S. Hydrothermally treated chitosan spontaneously forms water-soluble spherical particles stable at a wide pH range. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1163568] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Synthesis, characterization and anticorrosion potentials of chitosan-g-PEG assembled on silver nanoparticles. Int J Biol Macromol 2016; 83:297-305. [DOI: 10.1016/j.ijbiomac.2015.11.073] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 11/18/2015] [Accepted: 11/25/2015] [Indexed: 11/17/2022]
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8
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Yang Y, Wang S, Wang Y, Wang X, Wang Q, Chen M. Advances in self-assembled chitosan nanomaterials for drug delivery. Biotechnol Adv 2014; 32:1301-1316. [PMID: 25109677 DOI: 10.1016/j.biotechadv.2014.07.007] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 06/24/2014] [Accepted: 07/30/2014] [Indexed: 02/06/2023]
Abstract
Nanomaterials based on chitosan have emerged as promising carriers of therapeutic agents for drug delivery due to good biocompatibility, biodegradability, and low toxicity. Chitosan originated nanocarriers have been prepared by mini-emulsion, chemical or ionic gelation, coacervation/precipitation, and spray-drying methods. As alternatives to these traditional fabrication methods, self-assembled chitosan nanomaterials show significant advantages and have received growing scientific attention in recent years. Self-assembly is a spontaneous process by which organized structures with particular functions and properties could be obtained without additional complicated processing or modification steps. In this review, we focus on recent progress in the design, fabrication and physicochemical aspects of chitosan-based self-assembled nanomaterials. Their applications in drug delivery of different therapeutic agents are also discussed in details.
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Affiliation(s)
- Yu Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Shengpeng Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Xiaohui Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Qun Wang
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA; Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA 50011, USA.
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
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9
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Novoa-Carballal R, Riguera R, Fernandez-Megia E. Disclosing an NMR-Invisible Fraction in Chitosan and PEGylated Copolymers and Its Role on the Determination of Degrees of Substitution. Mol Pharm 2013; 10:3225-31. [DOI: 10.1021/mp400267m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ramon Novoa-Carballal
- Department
of Organic Chemistry and Center for Research
in Biological Chemistry and Molecular Materials (CIQUS), University of Santiago de Compostela, Jenaro de la
Fuente s/n, 15782 Santiago de Compostela, Spain
| | - Ricardo Riguera
- Department
of Organic Chemistry and Center for Research
in Biological Chemistry and Molecular Materials (CIQUS), University of Santiago de Compostela, Jenaro de la
Fuente s/n, 15782 Santiago de Compostela, Spain
| | - Eduardo Fernandez-Megia
- Department
of Organic Chemistry and Center for Research
in Biological Chemistry and Molecular Materials (CIQUS), University of Santiago de Compostela, Jenaro de la
Fuente s/n, 15782 Santiago de Compostela, Spain
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10
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Morimoto M, Nakajima T, Ishikura M, Shigemasa Y, Ifuku S, Saimoto H. Synthesis of organosoluble chitosan derivatives with polyphenolic side chains. Carbohydr Polym 2012; 90:1259-64. [PMID: 22939339 DOI: 10.1016/j.carbpol.2012.06.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 06/12/2012] [Accepted: 06/22/2012] [Indexed: 11/19/2022]
Abstract
A one-pot synthesis was used to produce chitosan derivatives with polyphenolic side chains via a regioselective phenolic coupling reaction. Under Mannich reaction conditions, treatment of chitosan with formaldehyde and methyl 2,4-dihydroxybenzoate gave N-(2,6-dihydroxy-3-methoxycarbonylphenyl)methylated chitosan in good yield (87%). Formation of a CC bond occurred regioselectively at the C(3) position of methyl 2,4-dihydroxybenzoate. Chitosan derivatives having various phenolic compounds as a side chain were easily synthesized in a similar manner. The chitosan derivatives showed good biodegradability and improved their solubility in methanol (9.8mg mL(-1)) and 2-methoxyethanol (> 10mg mL(-1)). The UV protection provided by the derivatives with phenolic benzophenone side chain was evaluated using UV spectra of polyethylene terephthalate and poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) films coated with the derivatives and the derivatives absorbed effectively in the UV-A region (<60%). Self-aggregation of the chitosan derivatives with the phenolic side chain was observed by using a fluorescent probe in aqueous solution.
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Affiliation(s)
- Minoru Morimoto
- Research Center for Bioscience and Technology, Tottori University, Koyama, Tottori 680-8550, Japan
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11
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Chitosan-g-PEG nanoparticles ionically crosslinked with poly(glutamic acid) and tripolyphosphate as protein delivery systems. Int J Pharm 2012; 430:318-27. [DOI: 10.1016/j.ijpharm.2012.04.004] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 04/01/2012] [Accepted: 04/02/2012] [Indexed: 12/23/2022]
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12
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13
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Deng L, Qi H, Yao C, Feng M, Dong A. Investigation on the properties of methoxy poly(ethylene glycol)/chitosan graft co-polymers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012. [DOI: 10.1163/156856207794761943] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Liandong Deng
- a Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Haiying Qi
- b Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Chunmei Yao
- c Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Menghuang Feng
- d Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
| | - Anjie Dong
- e Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
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14
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Sun G, Shen YI, Ho CC, Kusuma S, Gerecht S. Functional groups affect physical and biological properties of dextran-based hydrogels. J Biomed Mater Res A 2010; 93:1080-90. [PMID: 19753626 DOI: 10.1002/jbm.a.32604] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Modification of dextran backbone allows the development of a hydrogel with specific characteristics. To enhance their functionality for tissue-engineered scaffolds, a series of dextran-based macromers was synthesized by incorporating various functional groups, including allyl isocyanate (Dex-AI), ethylamine (Dex-AE), chloroacetic acid (Dex-AC), or maleic-anhydride (Dex-AM) into dextrans. The dextran-based biodegradable hybrid hydrogels are developed by integrating polyethylene glycol diacrylate (PEGDA). To explore the effect of different derivatives on hydrogel properties, three different ratios of Dex/PEGDA are examined: low (20/80), medium (40/60), and high (60/40). Differences in physical and biological properties of the hydrogels are found, including swelling, degradation rate, mechanics, crosslinking density, biocompatibility (in vitro and in vivo), and vascular endothelial growth factor release. The results also indicate that the incorporation of amine groups into dextran gives rise to hydrogels with better biocompatible and release properties. We, therefore, conclude that the incorporation of different functional groups affects the fundamental properties of a dextran-based hydrogel network, and that amine groups are preferred to generate hydrogels for biomedical use.
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Affiliation(s)
- Guoming Sun
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
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15
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Wang F, Li X, Zhou Y, Zhang Y, Chen X, Yang J, Huang Y, Liu Y. Nanoscaled Polyion Complex Micelles for Targeted Delivery of Recombinant Hirudin to Platelets Based on Cationic Copolymer. Mol Pharm 2010; 7:718-26. [DOI: 10.1021/mp900271r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fei Wang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Xinru Li
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Yanxia Zhou
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Yanhui Zhang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Xingwei Chen
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Jingxiong Yang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Yanqing Huang
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
| | - Yan Liu
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Peking University, Beijing 100191, China, and Pharmaceutical Teaching Laboratory Center, Peking University, Beijing 100191, China
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Sun G, Chen FA, Chu CC. Effects of precursor and cross-linking parameters on the properties of dextran-allyl isocyanate-ethylamine/poly(ethylene glycol diacrylate) biodegradable hydrogels and their release of ovalbumin. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 20:2003-22. [PMID: 19874674 DOI: 10.1163/156856208x396353] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this paper, we studied the effects of molecular weight of poly(ethylene glycol diacrylate) (PEGDA) precursor, the degree of substitution (DS) of both allyl isocyanate (AI) and amine groups in dextran-based precursor (Dex-AE), and photoinitiator concentration on Dex-AE/PEGDA hydrogel formation and its ovalbumin (OVA) release. FT-IR spectra showed chemical bond interaction between amine and urethane groups of the hydrogel carriers with OVA. The increase in PEGDA molecular weight led to a faster OVA release because of a more open gel network structure. The study on the DS of AI in Dex-AE precursor showed that an increase in AI did not result in a prominent gel network structure difference. However, the urethane groups in Dex-AE precursor showed some interactions with OVA and, thus, resulted in a slower release rate. The incorporation of amine group into Dex-AE precursor did not affect the gel network structure, but reduced the OVA release rate, and the level of reduction increased with an increasing amine group substitution into the Dex-AE precursor. This reduction could be attributed to the interaction between the amine groups in the gel carrier and OVA. An increase in the photoinitiator concentration showed no effect on the gel network structure or OVA release.
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Affiliation(s)
- Guoming Sun
- Department of Fiber Science and Apparel Design, Cornell University, Ithaca, NY 14853-4401, USA
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Li X, Kong X, Shi S, Gu Y, Yang L, Guo G, Luo F, Zhao X, Wei Y, Qian Z. Biodegradable MPEG-g-Chitosan and methoxy poly(ethylene glycol)-b-poly(ε-caprolactone) composite films: Part 1. Preparation and characterization. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2009.08.032] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Kulbokaite R, Ciuta G, Netopilik M, Makuska R. N-PEG’ylation of chitosan via “click chemistry” reactions. REACT FUNCT POLYM 2009. [DOI: 10.1016/j.reactfunctpolym.2009.06.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Janciauskaite U, Rakutyte V, Miskinis J, Makuska R. Synthesis and properties of chitosan-N-dextran graft copolymers. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2007.12.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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20
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Dong AJ, Feng MH, Qi HY, Li SS, Deng LD. Synthesis and properties of O-carboxymethyl chitosan/methoxy poly(ethylene glycol) graft copolymers. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:869-76. [PMID: 17665110 DOI: 10.1007/s10856-007-3183-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2007] [Accepted: 05/17/2007] [Indexed: 05/16/2023]
Abstract
O-carboxymethyl chitosan/methoxy poly(ethylene glycol) graft copolymers (OCMCS-g-MPEGs) with different degrees of substitution (DS) were synthesized by reductive N-alkylation of chitosan with poly(ethylene glycol) aldehyde. The properties of OCMCS-g-MPEGs, including the solubility, structure, hydrodynamic behaviors, isoelectric point (IEP) and interaction with water-soluble chitosan, were investigated. As a PEGylated polyampholyte, OCMCS-g-MPEGs can resolve in water over all pH range and the pH value at IEP (pH(IEP)) decreases when DS increases. The hydrodynamic behaviors of OCMCS-g-MPEGs in deionized H(2)O are markedly affected by DS and pH(IEP) in the experiment concentration range. The particle size of the complexes of OCMCS-g-MPEGs with water-soluble chitosan is strongly affected by the concentration of water-soluble chitosan and the pH value.
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Affiliation(s)
- An-Jie Dong
- Department of Polymer Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, P.R. China.
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21
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Zhang W, Pan S, Zhang X, Luo X, Du Z. Preparation of monomethyl poly(ethylene glycol)-g-chitosan copolymers with various degrees of substitution: Their ability to encapsulate and condense plasmid DNA. J Appl Polym Sci 2008. [DOI: 10.1002/app.27610] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Tiera MJ, Qiu XP, Bechaouch S, Shi Q, Fernandes JC, Winnik FM. Synthesis and characterization of phosphorylcholine-substituted chitosans soluble in physiological pH conditions. Biomacromolecules 2007; 7:3151-6. [PMID: 17096545 DOI: 10.1021/bm060381u] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A polymer analogous synthesis involving the reductive amination of phosphorylcholine (PC)-glyceraldehyde with primary amines of deacetylated chitosan (M(w) approximately 57000 g mol(-1)) was used to prepare phosphorylcholine-substituted chitosans (PC-CH) with a degree of substitution (DS) ranging from approximately 11 to approximately 53 mol % PC-substituted glucosamine residues. The PC-CH derivatives were characterized by (1)H NMR spectroscopy, FTIR spectroscopy, and multiangle laser light scattering gel permeation chromatography (MALLS-GPC). The pK(a) of the PC-substituted amine groups (pK(a) approximately 7.20) was determined by (1)H NMR titration. The PC-CH samples (1.0 g L(-1)) were shown to be nontoxic using an MTT assay performed with human KB cells. Aqueous solutions of PC-CH samples (4.0 g L(-1)) of DS >or= 22 mol % PC-substituted glucosamine residues remained clear, independently of pH (4.0 < pH < 11.0). The remarkable water solubility and nontoxicity displayed by the new PC-CH samples open up new opportunities in the design of chitosan-based biomaterials and nanoparticles.
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Affiliation(s)
- Marcio J Tiera
- Departamento de Química e Ciências Ambientais, UNESP-Universidade Estadual Paulista, São José do Rio Preto, Brazil
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24
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Sun G, Chu CC. Synthesis, characterization of biodegradable dextran–allyl isocyanate–ethylamine/polyethylene glycol–diacrylate hydrogels and their in vitro release of albumin. Carbohydr Polym 2006. [DOI: 10.1016/j.carbpol.2006.01.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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25
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El-Sherbiny IM, Abdel-Bary EM, Harding DRK. Swelling characteristics andin vitro drug release study with pH- and thermally sensitive hydrogels based on modified chitosan. J Appl Polym Sci 2006. [DOI: 10.1002/app.23989] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Torres MA, Vieira RS, Beppu MM, Santana CC. Produção e caracterização de microesferas de quitosana modificadas quimicamente. POLIMEROS 2005. [DOI: 10.1590/s0104-14282005000400016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microesferas de quitosana podem ser empregadas na área de biomaterias, em processos biotecnológicos e como adsorventes. Neste trabalho, foi empregada a técnica de atomização e coagulação para produção dessas microesferas, que permitiu o controle dos parâmetros de operação e por conseqüência a obtenção de microesferas de tamanho e faixas de tamanho específicos. Após a sua obtenção, as microesferas foram modificadas quimicamente com objetivo de estudar as resistências térmica, mecânica e química. Para isso foram empregadas três rotas distintas: a-) reticulação com glutaraldeído; b-) reticulação com epicloridrina e c-) acetilação. As microesferas preparadas apresentaram distribuição de tamanho da ordem de 140 µm com desvio padrão de 11,9 µm. Após as modificações químicas, as microesferas apresentaram temperatura de degradação térmica em torno de 300 ºC, aumento da estabilidade química à solução de HCl, e diminuição da resistência mecânica.
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Lebouc F, Dez I, Desbrières J, Picton L, Madec PJ. Different ways for grafting ester derivatives of poly(ethylene glycol) onto chitosan: related characteristics and potential properties. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.11.104] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang JW, Hon MH. Synthesis and dynamic mechanical behavior of glucose-mediated poly(ethylene glycol/chitosan) membrane. J Appl Polym Sci 2004. [DOI: 10.1002/app.20525] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang JW, Hon MH. Effects of sugar cross-linking agents and thermal treatment on the culture of fibroblasts in vitro on a (PEG/chitosan) membrane. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2003; 14:119-37. [PMID: 12661664 DOI: 10.1163/156856203321142579] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The influences of sugar and a thermal treatment process on the properties of a PEG/chitosan membrane were investigated in this study. With increasing thermal treatment temperature, the cross-linking density was increased and the crystal structure was distorted in the sugar-mediated polyblend. The coloration of the samples intensified from yellow or brown to dark brown during the heat exposure, indicating that a Schiff base was formed. The presence of cross-linking was determined from the FTIR spectrum, a solubility test, and water uptake. The C=N bonding shown in the FTIR spectrum indicates that a Maillard reaction occurred in the sugar-mediated polyblend. The water uptake ability of the samples tested was in the following sequence: sucrose > glucose > D-fructose, which was inverse to the trend of the cross-linking density. The compatibility of the polyblend and the sugar-mediated polyblend with fibroblasts was demonstrated. The thermal treatment has an insignificant effect on cell attachment on chitosan and the other polyblends, but different types of sugar and the cross-linking density changed the cell behavior. Consequently, chitosan/PEG6K cross-linked with sucrose at a concentration of 10 wt% and 120 degrees C thermal treatment shows potential for biomedical applications.
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Affiliation(s)
- Jian-Wen Wang
- Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 70101, Taiwan, ROC.
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