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Kotova S, Kostjuk S, Rochev Y, Efremov Y, Frolova A, Timashev P. Phase transition and potential biomedical applications of thermoresponsive compositions based on polysaccharides, proteins and DNA: A review. Int J Biol Macromol 2023; 249:126054. [PMID: 37532189 DOI: 10.1016/j.ijbiomac.2023.126054] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 07/26/2023] [Accepted: 07/27/2023] [Indexed: 08/04/2023]
Abstract
Smart thermoresponsive polymers have long attracted attention as materials of a great potential for biomedical applications, mainly for drug delivery, tissue engineering and wound dressing, with a special interest to injectable hydrogels. Poly-N-isopropylacrylamide (PNIPAM) is the most important synthetic thermoresponsive polymer due to its physiologically relevant transition temperature. However, the use of unmodified PNIPAM encounters such problems as low biodegradability, low drug loading capacity, slow response to thermal stimuli, and insufficient mechanical robustness. The use of natural polysaccharides and proteins in combinations with PNIPAM, in the form of grafted copolymers, IPNs, microgels and physical mixtures, is aimed at overcoming these drawbacks and creating dual-functional materials with both synthetic and natural polymers' properties. When developing such compositions, special attention should be paid to preserving their key property, thermoresponsiveness. Addition of hydrophobic and hydrophilic fragments to PNIPAM is known to affect its transition temperature. This review covers various classes of natural polymers - polysaccharides, fibrous and non-fibrous proteins, DNA - used in combination with PNIPAM for the prospective biomedical purposes, with a focus on their phase transition temperatures and its relation to the natural polymer's structure.
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Affiliation(s)
- Svetlana Kotova
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia.
| | - Sergei Kostjuk
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; Department of Chemistry, Belarusian State University, Minsk 220006, Belarus; Research Institute for Physical Chemical Problems of the Belarusian State University, Minsk 220006, Belarus
| | - Yuri Rochev
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; National University of Ireland Galway, Galway H91 CF50, Ireland
| | - Yuri Efremov
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Anastasia Frolova
- World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia
| | - Peter Timashev
- Institute for Regenerative Medicine, Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; World-Class Research Center "Digital Biodesign and Personalized Healthcare", Sechenov First Moscow State Medical University (Sechenov University), Moscow 119991, Russia; N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow 119991, Russia; Chemistry Department, Lomonosov Moscow State University, Moscow 119991, Russia
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Feyissa Z, Edossa GD, Gupta NK, Negera D. Development of double crosslinked sodium alginate/chitosan based hydrogels for controlled release of metronidazole and its antibacterial activity. Heliyon 2023; 9:e20144. [PMID: 37809897 PMCID: PMC10559936 DOI: 10.1016/j.heliyon.2023.e20144] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Revised: 09/08/2023] [Accepted: 09/13/2023] [Indexed: 10/10/2023] Open
Abstract
Double network sodium alginate/chitosan hydrogels were prepared using calcium chloride (CaCl2) and glutaraldehyde as the crosslinking agents by the ionotropic interaction method for controlled metronidazole release. The effect of polymer ratios and CaCl2 amount is investigated by the developing porosity, gel fraction, and extent of swelling in simulated physiological fluids. Interaction between the polymers with the formation of crosslinked structures, good stability, phase nature, and morphology of the hydrogels is revealed by Fourier-transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. A sodium alginate/chitosan hydrogel (weight ratio of 75:25) crosslinked with two percent CaCl2 is chosen for the in-situ loading of 200 mg of metronidazole. The drug release kinetics using different models show that the best-fit Korsmeyer-Peppas model suggests metronidazole release from the matrix follows diffusion and swelling-controlled time-dependent non-Fickian transport related to hydrogel erosion. This composition displays enhanced antimicrobial activity against Staphylococcus aureus and Escherichia coli.
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Affiliation(s)
- Zerihun Feyissa
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Gemechu Deressa Edossa
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Neeraj Kumar Gupta
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
| | - Defaru Negera
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P.O. Box 1888, Adama, Ethiopia
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Chen S, Wu C, Liu A, Wei D, Xiao Y, Guo Z, Chen L, Zhu Y, Sun J, Luo H, Fan H. Biofabrication of nerve fibers with mimetic myelin sheath-like structure and aligned fibrous niche. Biofabrication 2020; 12:035013. [PMID: 32240990 DOI: 10.1088/1758-5090/ab860d] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nerve tissues contain hierarchically ordered nerve fibers, while each of the nerve fibers has nano-oriented fibrous extracellular matrix and a core-shell structure of tubular myelin sheath with elongated axons encapsulated. Here, we report, for the first time, a ready approach to fabricate biomimetic nerve fibers which are oriented and have a core-shell structure to spatially encapsulate two types of cells, neurons and Schwann cells. A microfluidic system was designed and assembled, which contained a coaxial triple-channel chip and a stretching loading device. Alginate was used first to assist the fabrication, which was washed away afterwards. The orientation of the biomimetic nerve fibers was optimized by the control of the compositions of methacrylate hyaluronan and fibrin, together with the parameters of microfluidic shearing and external stretching. Also, neurons and Schwann cells, which were respectively located in the core and shell of the fibers, displayed advanced biologic functions, including neurogenesis and myelinating maturation. We demonstrate that the neural performance is relatively good, compared to that resulted from individually encapsulated in single-layer microfibers. The present study brings insights to fabricate biomimetic nerve fibers for their potential in neuroscience research and nerve regeneration. Moreover, the present methodology on the fabrication of oriented fibers with different types of cells separately encapsulated should be applicable to biomimetic constructions of various tissues.
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Affiliation(s)
- Suping Chen
- Engineering Research Center in Biomaterials, Sichuan University, Chengdu, Sichuan 610064 People's Republic of China
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Zhou Y, Qiu B, Yin X, Liu H, Zhu L. Concomitant drugs-loaded microcapsules of roxithromycin and theophylline with pH-sensitive controlled-releasing properties. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1596917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- You Zhou
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Bining Qiu
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Xueqiong Yin
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
| | - Haifang Liu
- Affiliated Haikou Hospital, Xiangya School of Medicine central south University, Haikou Municipal People’s Hospital, Haikou, Hainan, 570208, P.R. China
| | - Li Zhu
- Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou, P.R. China
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Wu T, Li Y, Shen N, Yuan C, Hu Y. Preparation and characterization of calcium alginate-chitosan complexes loaded with lysozyme. J FOOD ENG 2018. [DOI: 10.1016/j.jfoodeng.2018.03.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Semi-IPN- and IPN-Based Hydrogels. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1059:155-188. [DOI: 10.1007/978-3-319-76735-2_7] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Clara I, Natchimuthu N. Hydrogels of sodium alginate based copolymers grafted with sodium-2-acrylamido-2-methyl-1-propane sulfonate and methacrylic acid for controlled drug delivery applications. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2017. [DOI: 10.1080/10601325.2017.1403856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- I. Clara
- Department of Rubber and Plastics Technology, Madras Institute of Technology Campus, Anna University, Chennai, India
| | - N. Natchimuthu
- Department of Rubber and Plastics Technology, Madras Institute of Technology Campus, Anna University, Chennai, India
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Buwalda SJ, Vermonden T, Hennink WE. Hydrogels for Therapeutic Delivery: Current Developments and Future Directions. Biomacromolecules 2017; 18:316-330. [DOI: 10.1021/acs.biomac.6b01604] [Citation(s) in RCA: 251] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Sytze J. Buwalda
- Institute
of Biomolecules Max Mousseron, Department of Artificial Biopolymers,
Faculty of Pharmacy, UMR 5247, CNRS-University of Montpellier-ENSCM, Montpellier, France
| | - Tina Vermonden
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Wim E. Hennink
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Haq MA, Su Y, Wang D. Mechanical properties of PNIPAM based hydrogels: A review. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 70:842-855. [PMID: 27770962 DOI: 10.1016/j.msec.2016.09.081] [Citation(s) in RCA: 275] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/13/2016] [Accepted: 09/29/2016] [Indexed: 11/26/2022]
Abstract
Materials which adjust their properties in response to environmental factors such as temperature, pH and ionic strength are rapidly evolving and known as smart materials. Hydrogels formed by smart polymers have various applications. Among the smart polymers, thermoresponsive polymer poly(N-isopropylacrylamide)(PNIPAM) is very important because of its well defined structure and property specially its temperature response is closed to human body and can be finetuned as well. Mechanical properties are critical for the performance of stimuli responsive hydrogels in diverse applications. However, native PNIPAM hydrogels are very fragile and hardly useful for any practical purpose. Intense researches have been done in recent decade to enhance the mechanical features of PNIPAM hydrogel. In this review, several strategies including interpenetrating polymer network (IPN), double network (DN), nanocomposite (NC) and slide ring (SR) hydrogels are discussed in the context of PNIPAM hydrogel.
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Affiliation(s)
- Muhammad Abdul Haq
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; Laboratory of Food Engineering, Department of Food Science & Technology, University of Karachi, Karachi, Pakistan
| | - Yunlan Su
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China
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Superabsorbent hydrogels based on polysaccharides for application in agriculture as soil conditioner and nutrient carrier: A review. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.04.017] [Citation(s) in RCA: 393] [Impact Index Per Article: 43.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Stimuli-responsive gating membranes responding to temperature, pH, salt concentration and anion species. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2013.04.041] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Interpenetrating Polymer Networks polysaccharide hydrogels for drug delivery and tissue engineering. Adv Drug Deliv Rev 2013; 65:1172-87. [PMID: 23603210 DOI: 10.1016/j.addr.2013.04.002] [Citation(s) in RCA: 320] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Revised: 03/15/2013] [Accepted: 04/10/2013] [Indexed: 11/22/2022]
Abstract
The ever increasing improvements of pharmaceutical formulations have been often obtained by means of the use of hydrogels. In particular, environmentally sensitive hydrogels have been investigated as "smart" delivery systems capable to release, at the appropriate time and site of action, entrapped drugs in response to specific physiological triggers. At the same time the progress in the tissue engineering research area was possible because of significant innovations in the field of hydrogels. In recent years multicomponent hydrogels, such as semi-Interpenetrating Polymer Networks (semi-IPNs) and Interpenetrating Polymer Networks (IPNs) have emerged as innovative biomaterials for drug delivery and as scaffolds for tissue engineering. These interpenetrated hydrogel networks, which can be obtained by either chemical or physical crosslinking, in most cases show physico-chemical properties that can remarkably differ from those of the macromolecular constituents. Among the synthetic and natural polymers that have been used for the preparation of semi-IPNs and IPNs, polysaccharides represent a class of macromolecules of particular interest because they are usually abundant, available from renewable sources and have a large variety of composition and properties that may allow appropriately tailored chemical modifications. Sometimes both macromolecular systems are based on polysaccharides but often also synthetic polymers are present together with polysaccharide chains. The description and discussion of (semi)-IPNs reported here, will allow to acquire a better understanding of the potential and wide range of applications of IPN polysaccharide hydrogels. A quite large number of polysaccharides have been investigated for the design of (semi)-IPNs for drug delivery and tissue engineering applications. This review article however mainly focuses on two of the most studied polysaccharide-based (semi)-IPNs, namely those obtained using alginate and hyaluronic acid. An overview of the methods of preparation, the properties, the performances as drug delivery systems and as scaffolds for tissue engineering, of (semi)-IPNs obtained using these two polysaccharides and their derivatives, will be given.
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Martins AF, Bueno PV, Almeida EA, Rodrigues FH, Rubira AF, Muniz EC. Characterization of N-trimethyl chitosan/alginate complexes and curcumin release. Int J Biol Macromol 2013; 57:174-84. [DOI: 10.1016/j.ijbiomac.2013.03.029] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 01/30/2013] [Accepted: 03/09/2013] [Indexed: 10/27/2022]
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Wenceslau AC, dos Santos FG, Ramos ÉR, Nakamura CV, Rubira AF, Muniz EC. Thermo- and pH-sensitive IPN hydrogels based on PNIPAAm and PVA-Ma networks with LCST tailored close to human body temperature. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.04.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kostanski LK, Huang R, Filipe CDM, Ghosh R. Interpenetrating Polymer Networks as a Route to Tunable Multi-responsive Biomaterials: Development of Novel Concepts. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:271-97. [DOI: 10.1163/156856208x3999107] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- L. Kris Kostanski
- a Chemical Engineering Department, JHE 374, McMaster University, 1280 Main Street W., Hamilton, ON, Canada L8S 4L7
| | - Ruixiang Huang
- b Chemical Engineering Department, JHE 374, McMaster University, 1280 Main Street W., Hamilton, ON, Canada L8S 4L7
| | - Carlos D. M. Filipe
- c Chemical Engineering Department, JHE 374, McMaster University, 1280 Main Street W., Hamilton, ON, Canada L8S 4L7
| | - Raja Ghosh
- d Chemical Engineering Department, JHE 374, McMaster University, 1280 Main Street W., Hamilton, ON, Canada L8S 4L7
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Degradation controllable biomaterials constructed from lysozyme-loaded Ca-alginate microparticle/chitosan composites. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.09.006] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Doleski S, Yao L, Pandit A, Elvira C. NGF release from thermo-responsive collagen-polyNIPAam polymer networks supports neuronal cell growth and differentiation. J Biomed Mater Res A 2010; 94:457-65. [DOI: 10.1002/jbm.a.32642] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Zhao YH, Wee KH, Bai R. A novel electrolyte-responsive membrane with tunable permeation selectivity for protein purification. ACS APPLIED MATERIALS & INTERFACES 2010; 2:203-211. [PMID: 20356236 DOI: 10.1021/am900654d] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A novel electrolyte-responsive membrane, RC-g-PSBMA, was successfully prepared from regenerated cellulose (RC) membrane through surface-initiated atom transfer radical polymerization (ATRP) of a zwitterionic monomer, sulfobetaine methacrylate (SBMA). Different degrees of polymerization for the grafted SBMA polymers (i.e., PSBMA) on the RC membrane were easily obtained by adjusting the ATRP reaction conditions. The electrolyte-responsive behavior of RC-g-PSBMA was first evaluated through the permeation experiments with sodium chloride (NaCl) solutions of different concentrations. It was found that the permeability of RC-g-PSBMA showed a clear dependence on NaCl concentration in the solutions. To further examine the potential of RC-g-PSBMA for protein purification, bovine serum album (BSA) was chosen as a model protein and polystyrene nanoparticles (NPs) of different sizes were used as representative impurities in the solutions. The rejection rates of BSA and NPs by RC-g-PSBMA were examined with the solutions containing BSA and NPs at different NaCl concentrations. The results showed that the rejection rates of BSA were at a very low level regardless of the concentration of NaCl in the solutions, indicating that the membrane allowed BSA to permeate. However, the rejection rates of NPs of different sizes by RC-g-PSBMA changed remarkably with the concentration of NaCl in the solutions. The study has demonstrated the possibility to separate BSA from NPs of different sizes by using the same membrane but simply altering the concentration of NaCl in the solutions. Membranes with such properties will have a great potential for protein purification as well as for many other separation applications.
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Affiliation(s)
- Yong-Hong Zhao
- Division of Environmental Science and Engineering, Faculty of Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
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Yang L, Liang G, Zhang Z, He S, Wang J. Sodium alginate/Na+-rectorite composite films: Preparation, characterization, and properties. J Appl Polym Sci 2009. [DOI: 10.1002/app.30521] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Moura MRD, Rubira AF, Muniz EC. Hidrogéis semi-IPN baseados em rede de alginato-Ca2+ com PNIPAAm entrelaçado: propriedades hidrofílicas, morfológicas e mecânicas. POLIMEROS 2008. [DOI: 10.1590/s0104-14282008000200010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Neste trabalho, a termossensibilidade dos hidrogéis do tipo semi-IPN baseados em rede de alginato-Ca2+com poli(N-isopropil acrilamida) (PNIPAAm) entrelaçado, com diferentes teores de alginato e de PNIPAAm, foi caracterizada por meio de medidas de grau de intumescimento (Q), microscopia eletrônica de varredura (MEV) e propriedades mecânicas [tensão máxima de compressão (σ), densidade aparente de reticulação (νe) e módulo de elasticidade (E)]. Os valores de Q variam inversamente com νe. Para o parâmetro νe contribuem as concentrações de retículos alginato-Ca2+ e de cadeias de PNIPAAm. Hidrogéis com maiores valores de Q possuem maiores poros. Resultados de propriedades mecânicas demonstraram que hidrogéis com maior νe apresentam maior rigidez e resistência à compressão, sendo este efeito mais intenso acima da LCST do PNIPAAm. O controle dessas propriedades nesses hidrogéis termos-sensíveis torna esses materiais potencialmente viáveis para aplicação em sistemas carreadores para liberação controlada e/ou prolongada de fármacos e substratos para crescimento e cultura de célula.
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Matricardi P, Meo CD, Coviello T, Alhaique F. Recent advances and perspectives on coated alginate microspheres for modified drug delivery. Expert Opin Drug Deliv 2008; 5:417-25. [DOI: 10.1517/17425247.5.4.417] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Shi J, Alves NM, Mano JF. Chitosan coated alginate beads containing poly(N-isopropylacrylamide) for dual-stimuli-responsive drug release. J Biomed Mater Res B Appl Biomater 2008; 84:595-603. [PMID: 17618514 DOI: 10.1002/jbm.b.30907] [Citation(s) in RCA: 104] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Chitosan coated alginate beads containing poly(N-isopropylacrylamide) (PNIPAAM), were prepared to be used as a controlled pH/temperature sensitive drug delivery system with improved encapsulation efficiency and delayed release rate. The studied beads were characterized by differential scanning calorimetry, scanning electron microscopy, and Fourier transform infrared spectroscopy. Water uptake and release studies using indomethacin as a model drug were also performed. The drug loading efficiency of the beads with the polyelectrolyte complex coating is significantly higher (84%) than that of the uncoated ones (74%). The equilibrium swelling of the developed materials was found to be pH- and thermo- responsive. For all the conditions it was found that the release profile was slower for the coated beads, indicating that the polyelectrolyte complex coating could slow down the release rate effectively. These results suggest that the studied smart system has potential to be used as an effective pH/temperature sustainable delivery system for biomedical applications.
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Affiliation(s)
- Jun Shi
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Prabaharan M, Mano JF. Stimuli-Responsive Hydrogels Based on Polysaccharides Incorporated with Thermo-Responsive Polymers as Novel Biomaterials. Macromol Biosci 2006; 6:991-1008. [PMID: 17128423 DOI: 10.1002/mabi.200600164] [Citation(s) in RCA: 178] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In recent years, intelligent hydrogels which can change their swelling behavior and other properties in response to environmental stimuli such as temperature, pH, solvent composition and electric fields, have attracted great interest. The hydrogels based on polysaccharides incorporated with thermo-responsive polymers have shown unique properties such as biocompatibility, biodegradability, and biological functions in addition to the stimuli-responsive characters. These "smart" hydrogels exhibit single or multiple stimuli-responsive characters which could be used in biomedical applications, including controlled drug delivery, bioengineering or tissue engineering. This review focuses on the recent developments and future trends dealing with stimuli-responsive hydrogels based on grafting/blending of polysaccharides such as chitosan, alginate, cellulose, dextran and their derivatives with thermo-sensitive polymers. This review also screens the current applications of these hydrogels in the fields of drug delivery, tissue engineering and wound healing.
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Affiliation(s)
- Mani Prabaharan
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
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Shi J, Alves NM, Mano JF. Drug Release of pH/Temperature-Responsive Calcium Alginate/Poly(N-isopropylacrylamide) Semi-IPN Beads. Macromol Biosci 2006; 6:358-63. [PMID: 16671051 DOI: 10.1002/mabi.200600013] [Citation(s) in RCA: 130] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A series of semi-interpenetrating, polymer network (semi-IPN), hydrogel beads, composed of calcium alginate (Ca-alginate) and poly(N-isopropylacrylamide) (PNIPAAM), were prepared for a pH/temperature-sensitive drug delivery study. The equilibrium swelling showed the independent pH- and thermo- responsive nature of the developed materials. At pH=2.1, the release amount of indomethacin incorporated into these beads was about 10% within 400 min, while this value approached to 95% at pH=7.4. The release rate of the drug was higher at 37 degrees C than that at 25 degrees C and increased slightly with increasing PNIPAAM content. These results suggest that the Ca-alginate/PNIPAAM beads have the potential to be used as an effective pH/temperature sustainable delivery system of bioactive agents. [GRAPHS: SEE TEXT] A summary of the temperature- and pH-dependence on the release of the drug over a period of 450 min. The effect of the temperature on the swelling of the beads is shown in the inset.
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Affiliation(s)
- Jun Shi
- 3B's Research Group - Biomaterials, Biodegradables and Biomimetics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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Porous alginate-Ca2+ hydrogels interpenetrated with PNIPAAm networks: Interrelationship between compressive stress and pore morphology. Eur Polym J 2005. [DOI: 10.1016/j.eurpolymj.2005.06.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Zhang Y, Wu F, Li M, Wang E. pH switching on-off semi-IPN hydrogel based on cross-linked poly(acrylamide-co-acrylic acid) and linear polyallyamine. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.05.121] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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