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Bashir S, Teo YY, Naeem S, Ramesh S, Ramesh K. pH responsive N-succinyl chitosan/Poly (acrylamide-co-acrylic acid) hydrogels and in vitro release of 5-fluorouracil. PLoS One 2017; 12:e0179250. [PMID: 28678803 PMCID: PMC5497947 DOI: 10.1371/journal.pone.0179250] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Accepted: 05/28/2017] [Indexed: 11/23/2022] Open
Abstract
There has been significant progress in the last few decades in addressing the biomedical applications of polymer hydrogels. Particularly, stimuli responsive hydrogels have been inspected as elegant drug delivery systems capable to deliver at the appropriate site of action within the specific time. The present work describes the synthesis of pH responsive semi-interpenetrating network (semi-IPN) hydrogels of N-succinyl-chitosan (NSC) via Schiff base mechanism using glutaraldehyde as a crosslinking agent and Poly (acrylamide-co-acrylic acid)(Poly (AAm-co-AA)) was embedded within the N-succinyl chitosan network. The physico-chemical interactions were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and field emission scanning electron microscope (FESEM). The synthesized hydrogels constitute porous structure. The swelling ability was analyzed in physiological mediums of pH 7.4 and pH 1.2 at 37°C. Swelling properties of formulations with various amounts of NSC/ Poly (AAm-co-AA) and crosslinking agent at pH 7.4 and pH 1.2 were investigated. Hydrogels showed higher swelling ratios at pH 7.4 while lower at pH 1.2. Swelling kinetics and diffusion parameters were also determined. Drug loading, encapsulation efficiency, and in vitro release of 5-fluorouracil (5-FU) from the synthesized hydrogels were observed. In vitro release profile revealed the significant influence of pH, amount of NSC, Poly (AAm-co-AA), and crosslinking agent on the release of 5-FU. Accordingly, rapid and large release of drug was observed at pH 7.4 than at pH 1.2. The maximum encapsulation efficiency and release of 5-FU from SP2 were found to be 72.45% and 85.99%, respectively. Kinetics of drug release suggested controlled release mechanism of 5-FU is according to trend of non-Fickian. From the above results, it can be concluded that the synthesized hydrogels have capability to adapt their potential exploitation as targeted oral drug delivery carriers.
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Affiliation(s)
- Shahid Bashir
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Yin Yin Teo
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Sumaira Naeem
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - S. Ramesh
- Centre of Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - K. Ramesh
- Centre of Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
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Che Y, Li D, Liu Y, Ma Q, Tan Y, Yue Q, Meng F. Physically cross-linked pH-responsive chitosan-based hydrogels with enhanced mechanical performance for controlled drug delivery. RSC Adv 2016. [DOI: 10.1039/c6ra16746b] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel physically cross-linked pH-responsive hydrogel with enhanced mechanical performance was prepared from chitosan, acrylic acid and (2-dimethylamino) ethyl methacrylate via in situ free radical polymerization for controlled drug delivery.
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Affiliation(s)
- YuJu Che
- Marine College
- Shandong University
- Weihai 264209
- PR China
| | - Dongping Li
- Marine College
- Shandong University
- Weihai 264209
- PR China
| | - Yulong Liu
- Marine College
- Shandong University
- Weihai 264209
- PR China
| | - Qinglin Ma
- Marine College
- Shandong University
- Weihai 264209
- PR China
| | - Yebang Tan
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Qinyan Yue
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- PR China
| | - Fanjun Meng
- Marine College
- Shandong University
- Weihai 264209
- PR China
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3
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Effect of molecular weight reduction by gamma irradiation on chitosan film properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 55:174-80. [DOI: 10.1016/j.msec.2015.05.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Revised: 02/27/2015] [Accepted: 05/02/2015] [Indexed: 11/23/2022]
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Sharma RK, Lalita, Singh AP, Chauhan GS. Grafting of GMA and some comonomers onto chitosan for controlled release of diclofenac sodium. Int J Biol Macromol 2014; 64:368-76. [DOI: 10.1016/j.ijbiomac.2013.12.028] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 12/11/2013] [Accepted: 12/18/2013] [Indexed: 11/28/2022]
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Samanta HS, Ray SK. Controlled release of tinidazole and theophylline from chitosan based composite hydrogels. Carbohydr Polym 2014; 106:109-20. [PMID: 24721057 DOI: 10.1016/j.carbpol.2014.01.097] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/22/2014] [Accepted: 01/28/2014] [Indexed: 11/19/2022]
Abstract
Several composite hydrogels were synthesized by free radical crosslink copolymerization of acrylic acid (AA) and N' methylene bis-acrylamide (MBA) in the presence of chitosan (CS). During polymerization CS was incorporated in situ in the crosslinked polyacrylic acid gel to produce composite hydrogels. The structure and properties of the hydrogels were characterized by FTIR, (13)C NMR, DTA-TGA, XRD, swelling and diffusion characteristic and also network parameters. The loading and the in vitro release behaviours of theophylline and tinidazole model drugs were studied with these hydrogels. The wt% of CS and MBA and pH of the medium was found to strongly influence the drug release behaviour of the gels. Accordingly, the release rate of these two drugs was much faster at pH of 7.6 than at pH 1.5.
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Affiliation(s)
- Himadri Sekhar Samanta
- Department of Polymer Science and Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India
| | - Samit Kumar Ray
- Department of Polymer Science and Technology, University of Calcutta, 92, A.P.C. Road, Kolkata 700009, India.
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MISHIMA S, ASANO M. Immobilization of 1-Allyl-2-thiourea onto Poly(styrene-co-divinylbenzene) Gel by ^|^gamma;-Ray Irradiation and Adsorption of Zinc Bis DimethylDithiocarbamate onto Those Gels. KOBUNSHI RONBUNSHU 2014. [DOI: 10.1295/koron.71.352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Xu X, Chen S, Wu Q. Surface molecular imprinting on polypropylene fibers for rhodamine B selective adsorption. J Colloid Interface Sci 2012; 385:193-201. [DOI: 10.1016/j.jcis.2012.07.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2012] [Revised: 07/02/2012] [Accepted: 07/03/2012] [Indexed: 11/24/2022]
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Wang Q, Zhang J, Wang A. Preparation and characterization of a novel pH-sensitive chitosan-g-poly (acrylic acid)/attapulgite/sodium alginate composite hydrogel bead for controlled release of diclofenac sodium. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2009.06.010] [Citation(s) in RCA: 215] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zhao L, Mitomo H. Hydrogels of dihydroxypropyl chitosan crosslinked with irradiation at paste-like condition. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2008.10.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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MISHIMA S, ASANO M, YOSHIDA M. Immobilization of Functional Materials onto Poly(styrene-co-divinylbenzene) Gels by Gamma Irradiation and Adsorption Properties. KOBUNSHI RONBUNSHU 2009. [DOI: 10.1295/koron.66.250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Dergunov SA, Mun GA. γ-irradiated chitosan-polyvinyl pyrrolidone hydrogels as pH-sensitive protein delivery system. Radiat Phys Chem Oxf Engl 1993 2009. [DOI: 10.1016/j.radphyschem.2008.07.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Long Zhao, Mitomo H, Yosh F. Synthesis of pH-Sensitive and Biodegradable CM-Cellulose/Chitosan Polyampholytic Hydrogels with Electron Beam Irradiation. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911508092302] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A series of novel environment-conscious hydrogels were prepared from carboxymethylated cellulose (CM-cellulose) and chitosan using irradiation without any additives. Gel fraction, mechanical property, and swelling behavior of the hydrogel were studied. The hydrogel blend exhibited improved mechanical property and good swelling in water. The blend hydrogels also displayed typical pH-sensitive swelling behavior. A preliminary biodegradation study confirmed that the hydrogel blends undergo biodegradation by enzymatic degradation.
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Affiliation(s)
- Long Zhao
- Department of Biological and Chemical Engineering Gunma University, Tenjin-cho, Kiryu, Gunma, 376-8515 Japan,
| | - Hiroshi Mitomo
- Department of Biological and Chemical Engineering Gunma University, Tenjin-cho, Kiryu, Gunma, 376-8515 Japan
| | - Fumio Yosh
- Takasaki Radiation Chemistry Research Establishment Japan Atomic Energy Agency, Watanuki-machi, Takasaki Gunma, 370-1292 Japan
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Ražem D, Katušin-Ražem B. The effects of irradiation on controlled drug delivery/controlled drug release systems. Radiat Phys Chem Oxf Engl 1993 2008. [DOI: 10.1016/j.radphyschem.2007.06.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Structure and swelling-release behaviour of poly(vinyl pyrrolidone) (PVP) and acrylic acid (AAc) copolymer hydrogels prepared by gamma irradiation. Eur Polym J 2007. [DOI: 10.1016/j.eurpolymj.2007.04.016] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Syntheses and characterization of novel pH-sensitive graft copolymers of maleoylchitosan and poly(acrylic acid). REACT FUNCT POLYM 2006. [DOI: 10.1016/j.reactfunctpolym.2006.01.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Kim IY, Yoo MK, Kim BC, Kim SK, Lee HC, Cho CS. Preparation of semi-interpenetrating polymer networks composed of chitosan and poloxamer. Int J Biol Macromol 2006; 38:51-8. [PMID: 16442610 DOI: 10.1016/j.ijbiomac.2005.12.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2005] [Revised: 09/22/2005] [Accepted: 12/21/2005] [Indexed: 11/24/2022]
Abstract
Through semi-interpenetration of polymer networks with poloxamer, mechanical properties of chitosan (CS) sponge were increased for wound dressing application. Synthesis of poloxamer macromer was confirmed by proton nuclear magnetic resonance (1H NMR) spectra. Possible interactions between CS and poloxamer in semi-interpenetrating polymer networks (SIPNs), and changes in crystalline structures of both polymers were evaluated by Fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD), respectively. Swelling behavior, thermal analysis, mechanical properties, and morphology of SIPNs were studied by thermal gravimetric analysis, differential scanning calorimetry (DSC), compressive modulus measurement, and scanning electron microscopy (SEM), respectively. Preparation of poloxamer macromer, and intermolecular hydrogen bonding between CS and poloxamer were confirmed by NMR and FTIR, respectively. Melting temperature of poloxamer in SIPNs decreased due to prevention of crystallization by incorporation of CS. Formation of SIPNs with poloxamer and increasing poloxamer content in CS/poloxamer SIPNs increased mechanical strength of CS sponge compared with CS/poloxamer blend. Formation of SIPNs with poloxamer remarkably increased water content of CS due to hydrophilicity of CS and poloxamer. These results suggest CS/poloxamer sponges prepared by SIPNs method have good possibility for wound dressing application owing to rapid water adsorption, high mechanical strength, and interconnected cross-sectional morphology of SIPNs.
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Affiliation(s)
- In-Yong Kim
- School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, South Korea
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Tanaka H, Ando Y, Wada M, Takahashi T. Synthesis of DTPA-conjugated (1,4)-linked 2-aminoglycosides varying in the anomeric configuration and their MRI contrast effect. Org Biomol Chem 2005; 3:3311-28. [PMID: 16132093 DOI: 10.1039/b507824e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We describe the efficient synthesis of DTPA-conjugated oligosaccharides composed of alpha- and/or beta-linked tri to monoglucosamines. Gd(iii) complex with DTPA-conjugated chitotriitol has been reported to be an effective MRI contrast agent. In order to elucidate the structure-property relationships, we planned to synthesize the DTPA-conjugated 2-amino-tri-, di-, and monosaccharides varying in configuration at the anomeric positions and the C2 position on the reducing end. Our strategy for the synthesis of the DTPA-conjugated oligosaccharides involves O-perbenzyl protected 2-amino-tri-, di-, and monosaccharides as key intermediates. The 2-aminoglycosides were prepared by non-selective glycosidation of 2-azido-2-deoxyglycosyl donors, followed by separation of two anomeric isomers. Although the synthesis involves separation of the stereoisomers, it circumvents not only the careful tuning of reaction conditions, but also the time-consuming preparation of glycosyl donors attached to different protecting groups. The protected 2-aminoglycosides were converted to the fully deprotected DTPA-conjugated tri- to monosaccharides by the same operation. MRI phantom study using the Gd(III) complexes of DTPA-conjugated oligosaccharides indicates that the number of the monosaccharide units was critical for enhancing the relative signal intensity of water protons per Gd, and various stereoisomers would be candidate scaffolds for MRI contrast agents.
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Affiliation(s)
- Hiroshi Tanaka
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo, 152-8552, Japan
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Alvarez-Lorenzo C, Concheiro A, Dubovik AS, Grinberg NV, Burova TV, Grinberg VY. Temperature-sensitive chitosan-poly(N-isopropylacrylamide) interpenetrated networks with enhanced loading capacity and controlled release properties. J Control Release 2005; 102:629-41. [PMID: 15681085 DOI: 10.1016/j.jconrel.2004.10.021] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2004] [Accepted: 10/18/2004] [Indexed: 11/30/2022]
Abstract
Interpenetrated polymer networks (IPN) of poly(N-isopropylacrylamide) (PNIPA) and chitosan (two grades) were prepared by free radical polymerisation and cross-linking of PNIPA (700 mM) with bis(acrylamide) (20 mM) in chitosan solutions (1.5 wt.% in acetic acid), and subsequent immersion in glutaraldehyde solutions (0 to 0.7 vol.%) to post-cross-link the chitosan. The amount of chitosan that remained in the IPNs, after washing, was proportional to the glutaraldehyde concentration used in the post-cross-linking step; being only 50% of the theoretical when the post-cross-linking was omitted (semi-IPN). The temperature-induced phase transitions of the IPNs were followed by the changes in the swelling degree and in the thermodynamic parameters (temperature, enthalpy, heat capacity, and width of the transition), which were evaluated using high-sensitivity differential scanning calorimetry (HS-DSC). An increase in the post-cross-linking degree of chitosan caused a decrease in the enthalpy of the transition, and in the absolute value of the transition heat capacity increment (delta(t)C(p)), as well as a broadening of the heat capacity peak. This behaviour is a consequence of the subdivision, in the IPNs, of the PNIPA network in microdomains, some regions of which (surface or outer) cannot be involved in the transitions. On the other hand, changes in pH from 8 to 3 only increased the transition temperature from about 32 to 34 degrees C, despite the considerable modification that this caused in the ionisation degree of chitosan. The PNIPA/chitosan IPNs had a notably greater affinity for diclofenac than the pure PNIPA hydrogel and were able to sustain the drug release for more than 8 h in 0.9% NaCl solutions or pH 8 phosphate buffer. The IPNs with lower chitosan post-cross-linking degree showed the higher temperature-sensitive release patterns. In contrast, the temperature did not significantly affect the release rate from the most cross-linked IPNs, in which the PNIPA microdomains are smaller and the volume phase transitions are less sharper. Therefore, PNIPA microdomains play an important role in controlling the release process. In summary, the interpenetration of networks with complementary properties, such as those made with PNIPA and chitosan, make it possible to develop drug delivery systems with improved drug loading capacity (owing to chitosan) and sustained release behaviour (owing to PNIPA).
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Affiliation(s)
- Carmen Alvarez-Lorenzo
- Departamento de Farmacia y Tecnología Farmacéutica, Facultad de Farmacia, Universidad de Santiago de Compostela, 15782-Santiago de Compostela, Spain.
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