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Martin V, Francisca Bettencourt A, Santos C, Sousa Gomes P. Reviewing particulate delivery systems loaded with repurposed tetracyclines - From micro to nanoparticles. Int J Pharm 2024; 649:123642. [PMID: 38029863 DOI: 10.1016/j.ijpharm.2023.123642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/07/2023] [Accepted: 11/26/2023] [Indexed: 12/01/2023]
Abstract
Tetracyclines (TCs) are a class of broad-spectrum antibacterial agents recognized for their multifaceted properties, including anti-inflammatory, angiogenic and osteogenic effects. This versatility positions them as suitable candidates for drug repurposing, benefitting from well-characterized safety and pharmacological profiles. In the attempt to explore both their antibacterial and pleiotropic effects locally, innovative therapeutic strategies were set on engineering tetracycline-loaded micro and nanoparticles to tackle a vast number of clinical applications. Moreover, the conjoined drug carrier can function as an active component of the therapeutic approach, reducing off-target effects and accumulation, synergizing to an improvement of the therapeutic efficacy. In this comprehensive review we will critically evaluate recent advances involving the use of tetracyclines loaded onto micro- or nanoparticles, intended for biomedical applications, and discuss emerging approaches and current limitations associated with these drug carriers. Owing to their distinctive physical, chemical, and biological properties, these novel carriers have the potential to become a platform technology in personalized regenerative medicine and other therapeutic applications.
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Affiliation(s)
- Victor Martin
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; LAQV/REQUIMTE, University of Porto, Praça Coronel Pacheco, 4050-453 Porto, Portugal.
| | - Ana Francisca Bettencourt
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa, Avenida Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - Catarina Santos
- CQE Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal; EST Setúbal, CDP2T, Instituto Politécnico de Setúbal, Campus IPS, 2910 Setúbal, Portugal
| | - Pedro Sousa Gomes
- BoneLab-Laboratory for Bone Metabolism and Regeneration, Faculty of Dental Medicine, University of Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; LAQV/REQUIMTE, University of Porto, Praça Coronel Pacheco, 4050-453 Porto, Portugal
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2
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Karimi Z, Taymouri S, Minaiyan M, Mirian M. Evaluation of thermosensitive chitosan hydrogel containing gefitinib loaded cellulose acetate butyrate nanoparticles in a subcutaneous breast cancer model. Int J Pharm 2022; 624:122036. [PMID: 35868480 DOI: 10.1016/j.ijpharm.2022.122036] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/27/2022] [Accepted: 07/17/2022] [Indexed: 10/17/2022]
Abstract
In the present study, gefitinib loaded cellulose acetate butyrate nanoparticles (Gnb-NPs) were prepared and then incorporated into thermo-sensitive chitosan/β-glycerophosphate hydrogels for intratumoral administration in mice bearing breast cancer. Accordingly, Gnb-NPs were prepared using the solvent evaporation process and optimized by applying a two-level fractional factorial design. Properties of NPs, including particle size, zeta potential (ZP), polydispersity index (PdI), encapsulation efficiency (EE) % and drug loading (DL) %, were investigated; the optimized Gnb-NPs were then loaded in chitosan hydrogels (Gnb-NPs-Hydrogel). The formulated Gnb-NPs-Hydrogel was assessed in terms of gelling time, release behavior, injectability, swelling and degradation behavior. The anti-cancer efficacy of Gnb-NPs-Hydrogel was evaluated in vitro against the 4 T1 breast cancer cell line and in vivo in breast tumor bearing mice. The optimized formulation showed spherical particles with the size of 156.50 ± 2.40 nm, PdI of 0.20 ± 0.002, ZP of -4.90 ± 0.04 mV, EE of 99.77 ± 0.09 % and DL of 20.59 ± 0.05 %. Incorporating Gnb-NPs into the hydrogel led to the decrease of the drug release rate. Gnb-NPs-Hydrogel displayed a greater cytotoxic effect in comparison to the free Gnb and Gnb-Hydrogel in 4 T1 cancer cells. Furthermore,intratumorallyinjectedGnb-NPs-Hydrogel showed the strongest antitumor efficacy in vivo. The superior performance of Gnb-NPs-Hydrogel, thus, demonstrated its potential for the treatment of breast cancer.
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Affiliation(s)
- Zahra Karimi
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Somayeh Taymouri
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Mohsen Minaiyan
- Department of Pharmacology, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mina Mirian
- Department of Biotechnology, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
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Budinčić JM, Petrović L, Đekić L, Fraj J, Bučko S, Katona J, Spasojević L. Study of vitamin E microencapsulation and controlled release from chitosan/sodium lauryl ether sulfate microcapsules. Carbohydr Polym 2021; 251:116988. [PMID: 33142560 DOI: 10.1016/j.carbpol.2020.116988] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 08/17/2020] [Accepted: 08/21/2020] [Indexed: 11/17/2022]
Abstract
Potential benefit of microencapsulation is its ability to deliver and protect incorporated ingredients such as vitamin E. Microcapsule wall properties can be changed by adding of coss-linking agents that are usually considered toxic for application. The microcapsules were prepared by a spray-drying technique using coacervation method, by depositing the coacervate formed in the mixture of chitosan and sodium lauryl ether sulfate to the oil/water interface. All obtained microcapsules suspensions had slightly lower mean diameter compared to the starting emulsion (6.85 ± 0.213 μm), which shows their good stability during the drying process. The choice and absence of cross-linking agents had influence on kinetics of vitamin E release. Encapsulation efficiency of microcapsules without cross-linking agent was 73.17 ± 0.64 %. This study avoided the use of aldehydes as cross-linking agents and found that chitosan/SLES complex can be used as wall material for the microencapsulation of hydrophobic active molecules in cosmetic industry.
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Affiliation(s)
- Jelena Milinković Budinčić
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia.
| | - Lidija Petrović
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Ljiljana Đekić
- Faculty of Pharmacy, University of Belgrade, Department of Pharmaceutical Technology and Cosmetology, Serbia
| | - Jadranka Fraj
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Sandra Bučko
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Jaroslav Katona
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
| | - Ljiljana Spasojević
- Faculty of Technology Novi Sad, University of Novi Sad, Department of Biotechnology and Pharmaceutical Engineering, Serbia
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Albarahmieh E, Alkhalidi BA, Al-Hiari Y. Evaluation of amorphous dispersion of a cellulose ester-colophony mix for ibuprofen controlled release processed by HME and spin coating. Carbohydr Polym 2020; 241:116265. [PMID: 32507195 DOI: 10.1016/j.carbpol.2020.116265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 03/06/2020] [Accepted: 04/06/2020] [Indexed: 11/19/2022]
Abstract
Recently, there has been a rapid growth of using bio-based materials in pharmaceutical applications, due to their low cost and availability. In this study, natural composition of cellaburate (cellulose-ester) and colophony (pine-resin) was used to prepare films to control ibuprofen release from its amorphous solid dispersion. The effect of two preparation technologies of spin-coating and hot-melt-extrusion was studied on the physicochemical properties and in vitro dissolution/release behavior. Physical stability was evaluated for 12 w at 54 %RH/22 °C. Characterization involved using PLM/DSC/MTDSC/ATRFTIR/TGA/SEM and PXRD. Ibuprofen was amorphously-dispersed at 30 %(w/w) in 35:65 colophony:cellaburate films. Spin-films were more physically stable over 12 w; however, controlled release of ibuprofen was achieved mainly from hot-melt-extruded-films for 5 h. Both films have shown first-order release kinetics; whereby polymeric swelling and relaxation likely governed the release. The successful preparation of cellaburate-colophony platform that has achieved tunable release profiles of poorly water-soluble drug holds the potential for further drug delivery development.
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Affiliation(s)
- Esra'a Albarahmieh
- Pharmaceutical Chemical Engineering Department, School of Applied Medical Sciences, German Jordanian University, P.O. Box 35247, Amman, 11180, Jordan.
| | - Bashar A Alkhalidi
- School of Pharmacy, University of Jordan, Queen Rania Street, 11942, Amman, Jordan
| | - Yusuf Al-Hiari
- School of Pharmacy, University of Jordan, Queen Rania Street, 11942, Amman, Jordan
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Chen K, Zhou J, Che X, Zhao R, Gao Q. One-step synthesis of core shell cellulose-silica/n-octadecane microcapsules and their application in waterborne self-healing multiple protective fabric coatings. J Colloid Interface Sci 2020; 566:401-410. [PMID: 32018180 DOI: 10.1016/j.jcis.2020.01.106] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 01/24/2020] [Accepted: 01/28/2020] [Indexed: 11/17/2022]
Abstract
Exploiting water-based fabric coatings outfitted with multiple protections (e.g., waterproofness, ultraviolet (UV) resistance and thermal insulation) are urgently demanded. Nevertheless, achieving the multifunction and durability poses the major challenge. In the present study, novel multifunctional cellulose/silica hybrid microcapsules were developed by one-step emulsion-solvent diffusion; these microcapsules were well dispersed into waterborne silicone resins to form waterborne multiple protective fabric coatings. Since the encapsulated phase change materials were in the core of capsules, and the hydrophobic coupling reagent and UV absorber were grafted onto the silicas in the shell of capsules, these fabric coatings exhibited high superhydrophobicity, UV protection and thermal insulation. Moreover, because hydrophobic coupling reagent and UV absorber in the shell-cellulose of capsules exhibited easy mobility, the fabric coatings displayed self-repairability of superhydrophobicity and UV protection even after being damaged chemically or mechanically. The fabric coating presented in this study could have a range of applications, covering special protective fabric, high-altitude garments as well as self-cleaning materials.
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Affiliation(s)
- Kunlin Chen
- Key Laboratory of Eco-Textile, Ministry of Education, School of Textiles and Clothing, Jiangnan University, Wuxi 214122, China.
| | - Jianlin Zhou
- Key Laboratory of Eco-Textile, Ministry of Education, School of Textiles and Clothing, Jiangnan University, Wuxi 214122, China
| | - Xiaogang Che
- Key Laboratory of Eco-Textile, Ministry of Education, School of Textiles and Clothing, Jiangnan University, Wuxi 214122, China
| | - Ruoyi Zhao
- Key Laboratory of Eco-Textile, Ministry of Education, School of Textiles and Clothing, Jiangnan University, Wuxi 214122, China
| | - Qiang Gao
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China.
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6
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Amanat S, Taymouri S, Varshosaz J, Minaiyan M, Talebi A. Carboxymethyl cellulose-based wafer enriched with resveratrol-loaded nanoparticles for enhanced wound healing. Drug Deliv Transl Res 2020; 10:1241-1254. [PMID: 31981141 DOI: 10.1007/s13346-020-00711-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The present study aimed to prepare and investigate the wound healing potential of carboxymethyl cellulose (CMC)-based wafers incorporated with resveratrol (RSV)-loaded cellulose acetate butyrate (CAB) NPs. Accordingly, RSV-CAB NPs were prepared using the solvent evaporation method. The effect of different formulation parameters (polymer content, surfactant concentration, and the volume ratio of aqueous phase to organic phase) on the properties of NPs was investigated using the Box-Behnken design. Then, the optimized NPs were incorporated in wafers comprising CMC combined with hydroxyl propyl methyl cellulose (HPMC) or chitosan. Hydration capacity, porosity, adhesive strength, and hardness of the prepared nanocomposite wafers were examined. Optimized formulation was spherical, showing the particle size, polydispersity index, zeta potential, encapsulation efficiency %, drug loading %, and release efficiency % of 248.5 nm, 0.38, - 1.59, 87.58, 25.94, and 67.10, respectively. The CMC-HPMC wafers exhibited higher porosity, hydration capacity, and adhesive performance, as compared with the CMC wafers alone and CMC-chitosan wafers. Wound healing test and histological evaluation in the excisional wounds of the rats showed that the RSV-NPs-wafers were more effective as a healing accelerator, in comparison to wafers without drug or those containing the free RSV. These results demonstrated the potential of the RSV-NPs-wafer in wound healing drug delivery applications. Graphical abstract.
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Affiliation(s)
- Shabnam Amanat
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, PO Box 81745-359, Isfahan, Iran
| | - Somayeh Taymouri
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, PO Box 81745-359, Isfahan, Iran.
| | - Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, PO Box 81745-359, Isfahan, Iran
| | - Mohsen Minaiyan
- Department of Pharmacology, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ardeshir Talebi
- Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran
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Zaszczynska A, Sajkiewicz P, Gradys A. Piezoelectric Scaffolds as Smart Materials for Neural Tissue Engineering. Polymers (Basel) 2020; 12:E161. [PMID: 31936240 PMCID: PMC7022784 DOI: 10.3390/polym12010161] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 12/31/2019] [Accepted: 01/05/2020] [Indexed: 01/03/2023] Open
Abstract
Injury to the central or peripheral nervous systems leads to the loss of cognitive and/or sensorimotor capabilities, which still lacks an effective treatment. Tissue engineering in the post-injury brain represents a promising option for cellular replacement and rescue, providing a cell scaffold for either transplanted or resident cells. Tissue engineering relies on scaffolds for supporting cell differentiation and growth with recent emphasis on stimuli responsive scaffolds, sometimes called smart scaffolds. One of the representatives of this material group is piezoelectric scaffolds, being able to generate electrical charges under mechanical stimulation, which creates a real prospect for using such scaffolds in non-invasive therapy of neural tissue. This paper summarizes the recent knowledge on piezoelectric materials used for tissue engineering, especially neural tissue engineering. The most used materials for tissue engineering strategies are reported together with the main achievements, challenges, and future needs for research and actual therapies. This review provides thus a compilation of the most relevant results and strategies and serves as a starting point for novel research pathways in the most relevant and challenging open questions.
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Affiliation(s)
- Angelika Zaszczynska
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
| | - Paweł Sajkiewicz
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
| | - Arkadiusz Gradys
- Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5b St., 02-106 Warsaw, Poland
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Abstract
Microparticles, microspheres, and microcapsules are widely used constituents of multiparticulate drug delivery systems, offering both therapeutic and technological advantages. Microparticles are generally in the 1–1000 µm size range, serve as multiunit drug delivery systems with well-defined physiological and pharmacokinetic benefits in order to improve the effectiveness, tolerability, and patient compliance. This paper reviews their evolution, significance, and formulation factors (excipients and procedures), as well as their most important practical applications (inhaled insulin, liposomal preparations). The article presents the most important structures of microparticles (microspheres, microcapsules, coated pellets, etc.), interpreted with microscopic images too. The most significant production processes (spray drying, extrusion, coacervation, freeze-drying, microfluidics), the drug release mechanisms, and the commonly used excipients, the characterization, and the novel drug delivery systems (microbubbles, microsponges), as well as the preparations used in therapy are discussed in detail.
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Ahangaran F, Navarchian AH, Picchioni F. Material encapsulation in poly(methyl methacrylate) shell: A review. J Appl Polym Sci 2019. [DOI: 10.1002/app.48039] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Fatemeh Ahangaran
- Department of Chemical Engineering, Faculty of EngineeringUniversity of Isfahan Isfahan 81746‐73441 Iran
- Department of Chemical EngineeringUniversity of Groningen Nijenborgh 4, 9747 AG Groningen The Netherlands
| | - Amir H. Navarchian
- Department of Chemical Engineering, Faculty of EngineeringUniversity of Isfahan Isfahan 81746‐73441 Iran
| | - Francesco Picchioni
- Department of Chemical EngineeringUniversity of Groningen Nijenborgh 4, 9747 AG Groningen The Netherlands
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Hu R, Huang B, Xue Z, Li Q, Xia T, Zhang W, Lu C, Xu H. Synthesis of photocurable cellulose acetate butyrate resin for continuous liquid interface production of three-dimensional objects with excellent mechanical and chemical-resistant properties. Carbohydr Polym 2019; 207:609-618. [PMID: 30600046 DOI: 10.1016/j.carbpol.2018.12.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 11/09/2018] [Accepted: 12/10/2018] [Indexed: 12/31/2022]
Abstract
Three-dimensional (3D) printing parts with excellent resolution and high performance are of great significance for scientific and engineering applications. In this study, a novel photocurable cellulose acetate butyrate (PC-CAB) resin was synthesized for continuous liquid interface production (CLIP) to construct 3D objects with high resolution, tailored mechanical properties, excellent chemical resistance and thermal stability. Particularly, the tensile and flexural strength of the CLIP 3D printed specimen could reach 44.67 and 64.53 MPa, respectively. Their solvent resistance against various organic solvents and strong acidic/basic solutions was evaluated. As expected, the 3D prints could well maintain their structural integrity and exhibited very low swelling ratios owing to the photo-induced chemical crosslinking structure. Notably, even after immersion in methylene chloride or 1.0 M acid/alkali for 3 h, the 3D prints still showed excellent mechanical and thermal properties. Further study demonstrated that when PC-CAB in the CLIP ink was optimized to 20 wt% while the photoinitiator (PI) was 0.5 wt%, complex-structured 3D printed objects with high surface quality could be obtained under specific printing parameters.
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Affiliation(s)
- Rui Hu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
| | - Bingxue Huang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
| | - Zhouhang Xue
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
| | - Qingye Li
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
| | - Tian Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China
| | - Wei Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China; Advanced Polymer Materials Research Center of Sichuan University, Shishi 362700, China.
| | - Canhui Lu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute at Sichuan University, Chengdu 610065, China; Advanced Polymer Materials Research Center of Sichuan University, Shishi 362700, China.
| | - Huagang Xu
- Quanzhou Yunshang 3D Science & Technology Co. Ltd., Shishi 362700, China
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Reolon JB, Brustolin M, Accarini T, Viçozzi GP, Sari MHM, Bender EA, Haas SE, Brum MCS, Gündel A, Colomé LM. Co-encapsulation of acyclovir and curcumin into microparticles improves the physicochemical characteristics and potentiates in vitro antiviral action: Influence of the polymeric composition. Eur J Pharm Sci 2019; 131:167-176. [PMID: 30790703 DOI: 10.1016/j.ejps.2019.02.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 12/21/2018] [Accepted: 02/14/2019] [Indexed: 01/23/2023]
Abstract
The present study developed and characterized microparticles formulations containing acyclovir and curcumin co-encapsulated in order to overcome the biopharmaceutical limitations and increase the antiviral effect of both drugs. The microparticles were prepared by a spray drying methodology following the ratio 1:3 (drug:polymer), which were made by hydroxypropylmethylcellulose (HPMC) and/or Eudragit® RS100 (EUD). The MP-1 formulation was composed of HPMC and EUD (1:1), MP-2 formulation was composed only of HPMC and MP-3 formulation was composed only of EUD. All formulations showed yielding around 50% and acceptable powder flowability. Drug content determination around 82.1-96.8% and 81.8-87% for acyclovir and curcumin, respectively. The microparticles had spherical shape, size within 11.5-15.3 μm, unimodal distribution and no chemical interactions among the components of the formulations. Of particular importance, the polymeric composition considerably influenced on the release profile of the drugs. The in vitro release experiment demonstrated that the microencapsulation provided a sustained release of acyclovir as well as increased the solubility of curcumin. Besides, mathematical modeling indicated that the experimental fit biexponential equation. Importantly, drugs microencapsulation promoted superior antiviral effect against BoVH-1 virus in comparison to their free form, which could be attributed to the improvement in the aforementioned physicochemical parameters. Therefore, these formulations could be promising technological drug carriers for acyclovir and curcumin, which highlight the great offering a potential alternative treatment for viral herpes.
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Affiliation(s)
- Jéssica Brandão Reolon
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Maicon Brustolin
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Thainá Accarini
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Gabriel Pedroso Viçozzi
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Marcel Henrique Marcondes Sari
- Programa de Pós-graduação em Ciências Farmacêuticas, Laboratório de Tecnologia Farmacêutica, Departamento de Farmácia Industrial, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, Santa Maria 97105-900, RS, Brazil
| | - Eduardo André Bender
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Sandra Elisa Haas
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - Mario Celso Sperrotto Brum
- Programa de pós-graduação em Ciência Animal, Laboratório de Virologia, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil
| | - André Gündel
- Curso de Licenciatura em Física, Universidade Federal do Pampa, Campus Bagé, Avenida Maria Anunciação Gomes de Godoy, Bagé 96413-170, RS, Brazil
| | - Letícia Marques Colomé
- Programa de Pós-Graduação em Ciências Farmacêuticas, Universidade Federal do Pampa, Campus Uruguaiana, Uruguaiana 97500-970, RS, Brazil.
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Huang A, Li X, Liang X, Zhang Y, Hu H, Yin Y, Huang Z. Solid-Phase Synthesis of Cellulose Acetate Butyrate as Microsphere Wall Materials for Sustained Release of Emamectin Benzoate. Polymers (Basel) 2018; 10:E1381. [PMID: 30961306 PMCID: PMC6401682 DOI: 10.3390/polym10121381] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 12/05/2018] [Accepted: 12/10/2018] [Indexed: 12/18/2022] Open
Abstract
Emamectin benzoate (EB), a widely used pesticide, is prone to decomposition by ultraviolet light and suffers from the corresponding loss of efficacy. The timed release of EB based on microspheres is one of the effective methods to solve this issue. As a non-toxic cellulose ester, cellulose acetate butyrate (CAB) is regarded as one of the best wall-forming materials for microcapsules with a good controlled release performance. Herein, two methods-mechanical activation (MA) technology and a conventional liquid phase (LP) method-were employed to synthesize different CABs, namely CAB-MA and CAB-LP, respectively. The molecular structure, rheological property, and thermal stability of these CABs were investigated. The two CABs were used to prepare microspheres for the loading and release of EB via an o/w (oil-in-water) solvent evaporation method. Moreover, the performances such as drug loading, drug entrapment, and anti-photolysis of the drug for these microspheres were studied. The results showed that both CABs were available as wall materials for loading and releasing EB. Compared with CAB-LP, CAB-MA presented a lower molecular weight and a narrower molecular weight distribution. Moreover, the MA method endowed the CAB with more ester substituent groups and less crystalline structure in comparison to the LP method, which had benefits including pelletizing and drug loading.
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Affiliation(s)
- Aimin Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
- Medical College of Guangxi University, Nanning 530004, China.
| | - Xuanhai Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
| | - Xingtang Liang
- Qinzhou Key Laboratory of Biowaste Resources for Selenium-Enriched Functional Utilization, College of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou 535011, China.
| | - Yanjuan Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
| | - Huayu Hu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
| | - Yanzhen Yin
- Qinzhou Key Laboratory of Biowaste Resources for Selenium-Enriched Functional Utilization, College of Petroleum and Chemical Engineering, Qinzhou University, Qinzhou 535011, China.
| | - Zuqiang Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
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13
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Porcu EP, Salis A, Rassu G, Maestri M, Galafassi J, Bruni G, Giunchedi P, Gavini E. Engineered polymeric microspheres obtained by multi-step method as potential systems for transarterial embolization and intraoperative imaging of HCC: Preliminary evaluation. Eur J Pharm Biopharm 2017; 117:160-167. [DOI: 10.1016/j.ejpb.2017.04.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 04/06/2017] [Accepted: 04/11/2017] [Indexed: 12/11/2022]
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Tang S, Yourdkhani M, Possanza Casey CM, Sottos NR, White SR, Moore JS. Low-Ceiling-Temperature Polymer Microcapsules with Hydrophobic Payloads via Rapid Emulsion-Solvent Evaporation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20115-20123. [PMID: 28544851 DOI: 10.1021/acsami.7b05266] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report a microencapsulation procedure based on rapid solvent evaporation to prepare microcapsules with hydrophobic core materials and low-ceiling-temperature polymer shell wall of cyclic poly(phthalaldehyde) (cPPA). We use and compare microfluidic and bulk emulsions. In both methods, rapid solvent evaporation following emulsification resulted in kinetically trapped core-shell microcapsules, whereas slow evaporation resulted in acorn morphology. Through the systematic variation of encapsulation parameters, we found that polymer-to-core weight ratios higher than 1 and polymer concentrations higher than 4.5 wt % in the oil phase were required to obtain a core-shell structure. This microencapsulation procedure enabled the fabrication of microcapsules with high core loading, controlled size, morphology, and stability. This procedure is versatile, allowing for the encapsulation of other hydrophobic core materials, i.e., mineral oil and organotin catalyst, or using an alternative low-ceiling-temperature polymer shell wall, poly(vinyl tert-butyl carbonate sulfone).
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Affiliation(s)
- Shijia Tang
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Mostafa Yourdkhani
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Catherine M Possanza Casey
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Nancy R Sottos
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Scott R White
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Jeffrey S Moore
- Beckman Institute for Advanced Science and Technology, §Department of Materials Science and Engineering, ⊥Department of Aerospace Engineering, and ∥Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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15
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Zhao Y, He M, Zhao L, Wang S, Li Y, Gan L, Li M, Xu L, Chang PR, Anderson DP, Chen Y. Epichlorohydrin-Cross-linked Hydroxyethyl Cellulose/Soy Protein Isolate Composite Films as Biocompatible and Biodegradable Implants for Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2016; 8:2781-95. [PMID: 26741400 DOI: 10.1021/acsami.5b11152] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
A series of epichlorohydrin-cross-linked hydroxyethyl cellulose/soy protein isolate composite films (EHSF) was fabricated from hydroxyethyl cellulose (HEC) and soy protein isolate (SPI) using a process involving blending, cross-linking, solution casting, and evaporation. The films were characterized with FTIR, solid-state (13)C NMR, UV-vis spectroscopy, and mechanical testing. The results indicated that cross-linking interactions occurred in the inter- and intramolecules of HEC and SPI during the fabrication process. The EHSF films exhibited homogeneous structure and relative high light transmittance, indicating there was a certain degree of miscibility between HEC and SPI. The EHSF films exhibited a relative high mechanical strength in humid state and an adjustable water uptake ratio and moisture absorption ratio. Cytocompatibility, hemocompatibility and biodegradability were evaluated by a series of in vitro and in vivo experiments. These results showed that the EHSF films had good biocompatibility, hemocompatibility, and anticoagulant effect. Furthermore, EHSF films could be degraded in vitro and in vivo, and the degradation rate could be controlled by adjusting the SPI content. Hence, EHSF films might have a great potential for use in the biomedical field.
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Affiliation(s)
- Yanteng Zhao
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Meng He
- School of Materials Engineering, Yancheng Institute of Technology , Yancheng, Jiangsu 224051, China
| | - Lei Zhao
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Shiqun Wang
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Yinping Li
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Li Gan
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Mingming Li
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Li Xu
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
| | - Peter R Chang
- Bioproducts and Bioprocesses National Science Program, Agriculture and Agri-Food Canada , 107 Science Place, Saskatoon, Saskatchewan S7N 0X2, Canada
| | - Debbie P Anderson
- Bioproducts and Bioprocesses National Science Program, Agriculture and Agri-Food Canada , 107 Science Place, Saskatoon, Saskatchewan S7N 0X2, Canada
| | - Yun Chen
- Department of Biomedical Engineering, School of Basic Medical Sciences, Wuhan University , Wuhan 430071, China
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Huang C, Ouyang Y, Niu H, He N, Ke Q, Jin X, Li D, Fang J, Liu W, Fan C, Lin T. Nerve guidance conduits from aligned nanofibers: improvement of nerve regeneration through longitudinal nanogrooves on a fiber surface. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7189-7196. [PMID: 25786058 DOI: 10.1021/am509227t] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel fibrous conduit consisting of well-aligned nanofibers with longitudinal nanogrooves on the fiber surface was prepared by electrospinning and was subjected to an in vivo nerve regeneration study on rats using a sciatic nerve injury model. For comparison, a fibrous conduit having a similar fiber alignment structure without surface groove and an autograft were also conducted in the same test. The electrophysiological, walking track, gastrocnemius muscle, triple-immunofluorescence, and immunohistological analyses indicated that grooved fibers effectively improved sciatic nerve regeneration. This is mainly attributed to the highly ordered secondary structure formed by surface grooves and an increase in the specific surface area. Fibrous conduits made of longitudinally aligned nanofibers with longitudinal nanogrooves on the fiber surface may offer a new nerve guidance conduit for peripheral nerve repair and regeneration.
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Affiliation(s)
- Chen Huang
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Yuanming Ouyang
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
- ‡Department of Orthopaedic Surgery, the Affiliated Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, China
| | - Haitao Niu
- §Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
| | - Nanfei He
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Qinfei Ke
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Xiangyu Jin
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Dawei Li
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Jun Fang
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Wanjun Liu
- †Key Laboratory of Textile Science and Technology, College of Textiles, Donghua University, Shanghai 201620, China
| | - Cunyi Fan
- ‡Department of Orthopaedic Surgery, the Affiliated Sixth People's Hospital, Shanghai Jiaotong University, Shanghai 200233, China
| | - Tong Lin
- §Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia
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18
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David G, Fundueanu G, Pinteala M, Minea B, Dascalu A, Simionescu BC. Polymer engineering for drug/gene delivery: from simple towards complex architectures and hybrid materials. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2014-0708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The paper summarizes the history of the drug/gene delivery domain, pointing on polymers as a solution to specific challenges, and outlines the current situation in the field – focusing on the newest strategies intended to improve systems effectiveness and responsiveness (design keys, preparative approaches). Some recent results of the authors are briefly presented.
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Advanced progress of microencapsulation technologies: In vivo and in vitro models for studying oral and transdermal drug deliveries. J Control Release 2014; 178:25-45. [DOI: 10.1016/j.jconrel.2013.12.028] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/10/2013] [Accepted: 12/17/2013] [Indexed: 11/20/2022]
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Asmarandei I, Fundueanu G, Cristea M, Harabagiu V, Constantin M. Thermo- and pH-sensitive interpenetrating poly(N-isopropylacrylamide)/carboxymethyl pullulan network for drug delivery. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0293-3] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Wang FP, Mu HP, Zhang JY, Li WX, Wang QZ, Du XZ. Study on preparation and swelling kinetics of P(AA-co-C8PhEO10Mac) pH-sensitive hydrogelin vitrodrug release study. J Appl Polym Sci 2013. [DOI: 10.1002/app.39388] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fang Ping Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
| | - Hu Po Mu
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
| | - Jun Yin Zhang
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
| | - Wan Xia Li
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
| | - Qi Zhao Wang
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
| | - Xin Zhen Du
- Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education of China, College of Chemistry and Chemical Engineering, Northwest Normal University; Lanzhou; 730070; China
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22
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Phosphorylated curdlan microgels. Preparation, characterization, and in vitro drug release studies. Carbohydr Polym 2013; 94:889-98. [DOI: 10.1016/j.carbpol.2013.02.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 02/07/2013] [Accepted: 02/11/2013] [Indexed: 01/19/2023]
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Tu F, Lee D. Controlling the stability and size of double-emulsion-templated poly(lactic-co-glycolic) acid microcapsules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:9944-52. [PMID: 22667691 DOI: 10.1021/la301498f] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The stability and size of poly(lactic-co-glycolic)acid (PLGA)-containing double emulsions and the resulting PLGA microcapsules are controlled by varying the composition of highly monodisperse water-in-oil-in-water (W/O/W) double emulsions. We propose that the basic inner phase of W/O/W double emulsions catalyzes the hydrolysis of PLGA and the ionization of carboxylic acid end groups, which enhances the surface activity of PLGA and facilitates the stabilization of the double emulsions. The size of PLGA-containing double emulsions and that of resulting microcapsules can be readily tuned by osmotic annealing, which depends on the concentration ratio of a solute in the inner and outer phases of double emulsions. The internal volume of PLGA microcapsules can be changed by more than 3 orders of magnitude using this method. This approach also overcomes the difficulty in generating monodisperse double emulsions and microcapsules over a wide range of dimensions using a single microfluidic device. The osmotic annealing method can also be used to concentrate encapsulated species such as colloidal suspensions and biomacromolecules.
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Affiliation(s)
- Fuquan Tu
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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24
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Biondi M, Fusco S, Lewis AL, Netti PA. New Insights into the Mechanisms of the Interactions Between Doxorubicin and the Ion-Exchange Hydrogel DC Bead™ for Use in Transarterial Chemoembolization (TACE). JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:333-54. [DOI: 10.1163/092050610x551934] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Marco Biondi
- a Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy; Department of Pharmaceutical and Toxicological Chemistry, University of Naples Federico II, via Domenico Montesano 49, 80131 Naples, Italy
| | - Sabato Fusco
- b Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy; Italian Institute of Technology (IIT), via Morego 30, 16163 Genoa, Italy
| | - Andrew L. Lewis
- c Biocompatibles UK Ltd., Farnham Business Park, Weydon Lane, Farnham, Surrey GU9 8QL, UK
| | - Paolo A. Netti
- d Interdisciplinary Research Centre on Biomaterials (CRIB), University of Naples Federico II, Piazzale Tecchio 80, 80125 Naples, Italy; Italian Institute of Technology (IIT), via Morego 30, 16163 Genoa, Italy
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25
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Zhao ZX, Wang XS, Qin X, Chen Q, Anzai JI. Enzyme microcapsules with substrate selective permeability constructed via layer-by-layer polyelectrolyte self-assembly. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2011.12.010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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26
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Wang B, Tang Q, Hong N, Song L, Wang L, Shi Y, Hu Y. Effect of cellulose acetate butyrate microencapsulated ammonium polyphosphate on the flame retardancy, mechanical, electrical, and thermal properties of intumescent flame-retardant ethylene-vinyl acetate copolymer/microencapsulated ammonium polyphosphate/polyamide-6 blends. ACS APPLIED MATERIALS & INTERFACES 2011; 3:3754-61. [PMID: 21859130 DOI: 10.1021/am200940z] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Ammonium polyphosphate (APP), a widely used intumescent flame retardant, has been microencapsulated by cellulose acetate butyrate with the aim of enhancing the water resistance of APP and the compatibility between the ethylene-vinyl acetate copolymer (EVA) matrix and APP. The structure of microencapsulated ammonium polyphosphate (MCAPP) was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and water contact angle (WCA). The flame retadancy and thermal stability were investigated by a limiting oxygen index (LOI) test, UL-94 test, cone calorimeter, and thermogravimetric analysis (TGA). The WCA results indicated that MCAPP has excellent water resistance and hydrophobicity. The results demonstrated that MCAPP enhanced interfacial adhesion, mechanical, electrical, and thermal stability of the EVA/MCAPP/polyamide-6 (PA-6) system. The microencapsulation not only imparted EVA/MCAPP/PA-6 with a higher LOI value and UL-94 rating but also could significantly improve the fire safety. Furthermore, the microencapsulated EVA/MCAPP/PA-6 composites can still pass the UL-94 V-0 rating after treatment with water for 3 days at 70 °C, indicating excellent water resistance. This investigation provides a promising formulation for the intumescent flame retardant EVA with excellent properties.
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Affiliation(s)
- Bibo Wang
- State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, People's Republic of China
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Mazzitelli S, Capretto L, Carugo D, Zhang X, Piva R, Nastruzzi C. Optimised production of multifunctional microfibres by microfluidic chip technology for tissue engineering applications. LAB ON A CHIP 2011; 11:1776-85. [PMID: 21472178 DOI: 10.1039/c1lc20082h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
This paper describes a method for the production of alginate microfibres using glass-based microfluidic chips fabricated by a photolithography-wet etching procedure. The main focus of the work is the fabrication of a cell containing multifunctional microfibres which have great potential for applications in drug release formulations and tissue engineering scaffolds (to guide the regeneration of tissues in predefined sizes and shapes) providing cell structural support and immunoisolation. The key parameters, which critically influence the formation of microfibres and their geometries, were identified by a classical intuitive approach COST (Changing One Separate factor a Time). In particular, their effects on the microfibre diameter were investigated, which are directly associated with their functionalities relating to the implantation site, the nutrient availability and diffusion/transport of oxygen, essential nutrients, growth factors, metabolic waste and secretory products. The interplay between the alginate solution concentration, pumping rate and gelling bath concentration in controlling the diameter of the produced microfibres was investigated with a statistical approach by means of a "design of the experiments" (DoEs) optimization and screening. Finally, the processing impacts on cell viability, the cellular effect of wall thickness consistency and the spatial distribution of cells within the alginate microfibre were examined. We provide an approach for the production of alginate microfibres with controlled shape and content, which could be further developed for scaling up and working towards FDA approval.
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Affiliation(s)
- Stefania Mazzitelli
- Department of Biochemistry and Molecular Biology, University of Ferrara, Via F. Mortara 74, Ferrara, 44121, Italy
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Vasiliu S, Bunia I, Racovita S, Neagu V. Adsorption of cefotaxime sodium salt on polymer coated ion exchange resin microparticles: Kinetics, equilibrium and thermodynamic studies. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.02.039] [Citation(s) in RCA: 150] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Rodríguez K, Renneckar S, Gatenholm P. Biomimetic calcium phosphate crystal mineralization on electrospun cellulose-based scaffolds. ACS APPLIED MATERIALS & INTERFACES 2011; 3:681-9. [PMID: 21355545 DOI: 10.1021/am100972r] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Novel cellulose based-scaffolds were studied for their ability to nucleate bioactive calcium phosphate crystals for future bone healing applications. Cellulose-based scaffolds were produced by electrospinning cellulose acetate (CA) dissolved in a mixture of acetone/dimethylacetamide (DMAc). The resulting nonwoven CA mats containing fibrils with diameters in the range of 200 nm to 1.5 μm were saponified by NaOH/ethanol for varying times to produce regenerated cellulose scaffolds. Biomimetic crystal growth nucleated from the fiber surface was studied as a function of surface chemistry. Regenerated cellulose scaffolds of varying treatments were soaked in simulated body fluid (SBF) solution. Scaffolds that were treated with CaCl(2), a mixture of carboxymethyl cellulose (CMC) and CaCl(2), and NaOH and CaCl(2), were analyzed using X-ray photoelectron spectroscopy, X-ray powder diffraction, and scanning electron microscopy to understand the growth of bioactive calcium phosphate (Ca-P) crystals as a function of surface treatment. The crystal structure of the nucleated Ca-P crystals had a diffraction pattern similar to that of hydroxyapatite, the mineralized component of bone. The study shows that the scaffold surface chemistry can be manipulated, providing numerous routes to engineer cellulosic substrates for the requirements of scaffolding.
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Affiliation(s)
- Katia Rodríguez
- Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24060, United States
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Poly(vinyl alcohol) microspheres with pH- and thermosensitive properties as temperature-controlled drug delivery. Acta Biomater 2010; 6:3899-907. [PMID: 20447472 DOI: 10.1016/j.actbio.2010.04.026] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 03/29/2010] [Accepted: 04/29/2010] [Indexed: 11/20/2022]
Abstract
One of the most important inconveniences of the pH- and temperature-sensitive hydrogels is the loss of thermosensitivity when relatively large amounts of a pH-sensitive monomer are co-polymerized with N-isopropylacrylamide (NIPAAm). In order to overcome this drawback, we propose here a method to prepare thermosensitive poly(vinyl alcohol) (PVA) microspheres with a higher content of carboxylic groups that preserve thermosensitive properties. Moreover, PVA possesses excellent mechanical properties, biocompatibility and non-toxicity. PVA microspheres were obtained by suspension cross-linking of an acidified aqueous solution of the polymer with glutaraldehyde. Poly(N-isopropylacrylamide-co-N-hydroxymethyl acrylamide) (poly(NIPAAm-co-HMAAm)), designed to have a lower critical solution temperature (LCST) corresponding to that of the human body, was grafted onto PVA microspheres in order to confer them with thermosensitivity. Then, the pH-sensitive functional groups (COOH) were introduced by reaction between the un-grafted OH groups of PVA and succinic anhydride. The pH- and temperature-sensitive PVA microspheres display a sharp volume transition under physiological conditions around the LCST of the linear polymer. The microspheres possess good drug-loading capacity without losing their thermosensitive properties. Under simulated physiological conditions, the release of drugs is controlled by temperature.
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31
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Fundueanu G, Constantin M, Ascenzi P, Simionescu BC. An intelligent multicompartmental system based on thermo-sensitive starch microspheres for temperature-controlled release of drugs. Biomed Microdevices 2010; 12:693-704. [DOI: 10.1007/s10544-010-9422-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
There are many reports in the literature referring to the utilization of drug bound to ion-exchange resin (drug-resinate), especially in the drug delivery area. Ion-exchange resin complexes, which can be prepared from both acidic and basic drugs, have been widely studied and marketed. Salts of cationic and anionic exchange resins are insoluble complexes in which drug release results from exchange of bound drug ions by ions normally present in body fluids. Resins used are polymers that contain appropriately substituted acidic groups, such as carboxylic and sulfonic for cation exchangers; or basic groups, such as quaternary ammonium group for anion exchangers. Variables relating to the resin are the exchange capacity; degree of cross-linking, which determines the permeability of the resin, its swelling potential, and the access of the exchange sites to the drug ion; the effective pK(a) of the exchanging group, which determines the exchange affinity; and the resin particle size, which controls accessibility to the exchange ions. In this review, the properties of ion-exchange resins, selection of drugs that lend themselves to such an approach, selection of the appropriate resin, preparation of drug-resinate, evaluation of drug release, recent developments of drug-resinates, and applications are discussed.
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Affiliation(s)
- Xiaodi Guo
- Huahai US Inc., 2002 Eastpark Blvd., Cranbury, New Jersey 08512, USA
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Buhus G, Popa M, Desbrieres J. Hydrogels Based on Carboxymethylcellulose and Gelatin for Inclusion and Release of Chloramphenicol. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911509349687] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogels based on carboxymethylcellulose (CMC) and gelatin (GEL) crosslinked with glutaraldehyde were used to obtain interpenetrated— interconnecting polymer networks. They are designed to obtain controlled release polymeric drug systems. CMC and GEL were chosen for their biocompatibility and nontoxicity, which are compulsory conditions for polymers used in biomedical applications. By modifying the parameters of the crosslinking reaction, the obtained networks presented different crosslinking degrees and hence different swelling capacities. These properties determined the quantity of drug able to be loaded (0.25 g per gram of hydrogel). We obtained systems for which biologically active matter release was controlled by diffusion. The kinetics were zero-order during the major part of release period (∼500 min). These systems improve the bactericide activity compared with free drugs.
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Affiliation(s)
- Gabriela Buhus
- Department of Natural and Synthetic Polymers, "Gh. Asachi" Technical University of Iasi, Bd. D. Mangeron, nr. 71, 700050 Iasi, Romania, Universite de Pau et Pays de l'Adour, IPREM/EPCP (UMR CNRS 5254) Helioparc Pau Pyrénées, 2 avenue President Angot 64053 Pau Cedex 09, France
| | - Marcel Popa
- Department of Natural and Synthetic Polymers, "Gh. Asachi" Technical University of Iasi, Bd. D. Mangeron, nr. 71, 700050 Iasi, Romania,
| | - Jacques Desbrieres
- Universite de Pau et Pays de l'Adour, IPREM/EPCP (UMR CNRS 5254) Helioparc Pau Pyrénées, 2 avenue President Angot 64053 Pau Cedex 09, France
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Wang X, Li G, Wei J, Guan W. A novel method to control microcapsule release behavior via photo-crosslink polyurethane acrylate shells. J Appl Polym Sci 2009. [DOI: 10.1002/app.29604] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Zeng HX, Cheng G, Pan WS, Zhong GP, Huang M. Preparation of Codeine-Resinate and Chlorpheniramine-Resinate Sustained-Release Suspension and its Pharmacokinetic Evaluation in Beagle Dogs. Drug Dev Ind Pharm 2008; 33:649-65. [PMID: 17613029 DOI: 10.1080/03639040601050221] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Using ion exchange resins (IERs) as carriers, a dual-drug sustained release suspension containing codeine, and chlorpheniramine had been prepared to elevate drug safety, effectiveness and conformance. The codeine resinate and chlorpheniramine resinate beads were prepared by a batch process and then impregnated with Polyethylene glycol 4000 (PEG 4000), respectively. The PEG impregnated drug resinate beads were coated with ethylcellulose as the coating polymer and di-n-butyl-phthalate as plasticizer in ethanol and methylene chloride mixture by the Wurster process. The coated PEG impregnated drug resinate beads were dispersed in an aqueous suspending vehicle containing 0.5% w/w xanthan gum and 0.5% w/w of hydroxypropylmethylcellulose of nominal viscosity of 4000 cps, obtaining codeine resinate and chlorpheniramine resinate sustained-release suspension (CCSS). Codeine phosphate and chlorpheniramine maleate were respectively loaded onto AMBERLITE IRP 69, and PEG 4000 was used to impregnate drug resinate beads to maintain their geometry. Ethylcellulose with di-n-butyl-phthalate in ethanol and methylene chloride mixture for the coating of drug resinate beads was performed in Glatt fluidized bed coater, where the coating solution flow rate was 8-12 g/min, the inlet air temperature was 50-60 degrees C, the outlet air temperature was 32-38 degrees C, the atomizing air pressure was 2.0 bar and the fluidized air pressure was adjusted as required. Few significant agglomeration of circulating drug resinate beads was observed during the operation. The film weight gained 20% w/w and 15% w/w were suitable for the PEG impregnated codeine resinate and chlorpheniramine resinate beads, respectively. Residual solvent content increased with coating level, but inprocess drying could reduce residual solvent content. In the present study, the rates of drug release from both drug resinate beads were measured in 0.05 M and 0.5M KCl solutions. The increased ionic strength generally accelerated the release rate of both drugs. But the release of codeine from its resinate beads was much more rapid than chlorpheniramine released from its resinate beads in the same ionic strength release medium. The drug release specification of the CCSS, where release mediums were 0.05 M KCl solution for codeine and 0.5 M KCl solution for chlorpheniramine, was established to be in conformance with in vivo performance. Relative bioavailability and pharmacokinetics evaluation of the CCSS, using commercial immediate-release tablets as the reference preparation, were performed following a randomized two-way crossover design in beagle dogs. The drug concentrations in plasma were measured by a validated LC-MS/MS method to determine the pharmacokinetic parameters of CCSS. This LC-MS/MS method demonstrated high accuracy and precision for bioanalysis, and was proved quick and reliable for the pharmacokinetic studies. The results showed that the CCSS had the longer value of Tmax and the lower value of Cmax, which meant an obviously sustained release effect, and its relative bioavailability of codeine and chlorpheniramine were (103.6 +/- 14.6)% and (98.1 +/- 10.3)%, respectively, compared with the reference preparation. These findings indicated that a novel liquid sustained release suspension made by using IERs as carriers and subsequent fluidized bed coating might provide a constant plasma level of the active pharmaceutical ingredient being highly beneficial for various therapeutic reasons.
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Affiliation(s)
- Huan-Xiang Zeng
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, P. R. China.
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Salaün F, Devaux E, Bourbigot S, Rumeau P. Development of a precipitation method intended for the entrapment of hydrated salt. Carbohydr Polym 2008. [DOI: 10.1016/j.carbpol.2007.11.020] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Abdekhodaie MJ, Wu XY. Drug release from ion-exchange microspheres: Mathematical modeling and experimental verification. Biomaterials 2008; 29:1654-63. [DOI: 10.1016/j.biomaterials.2007.11.044] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2007] [Accepted: 11/27/2007] [Indexed: 11/26/2022]
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Albertini B, Passerini N, González-Rodríguez ML, Cavallari C, Cini M, Rodriguez L. Wet granulation as innovative and fast method to prepare controlled release granules based on an ion‐exchange resin. J Pharm Sci 2008; 97:1313-24. [PMID: 17674405 DOI: 10.1002/jps.21120] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The goal of this work was to evaluate the suitability of wet granulation as an innovative and fast method for the preparation of granules containing a drug-resin complex (resinate), having cholestyramine as resin and potassium diclofenac (KD) as drug. Resinate and granules were prepared directly by steam granulation in high shear mixer (method A), using two different amount of resin (granules 1 and 2). For comparison granules 1 were also prepared by conventional batch method followed by steam granulation (method B). All granules showed quite irregular shape, main size fractions between 75 and 500 microm, good flowability and uniform KD distribution. Granules 1A exhibited controlled release profiles at pH 7.4, while granules 2A showed a burst effect due to KD free crystals. FT-IR studies confirmed the complete complexation between resin and KD during the granulation process with method A for granules 1. Finally, the dissolution test of granules 1A in different media revealed a controlled drug release in 12 h, providing the utility of this system for enteric drug delivery. Granules 1B evidenced similar characteristics to those of granules 1A; the drawback of the multistep procedure was related to the long processing time.
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Affiliation(s)
- Beatrice Albertini
- Department of Pharmaceutical Sciences, University of Bologna, Via San Donato 19/2, 40127 Bologna, Italy.
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Mocanu G, Mihai D, Legros M, Picton L, Lecerf D. New Polysaccharide-based Microparticles Crosslinked with Siloxane: Interactions with Biologically Active Substances. J BIOACT COMPAT POL 2008. [DOI: 10.1177/0883911507085071] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The interaction of microparticles of carboxymethyl pullulan crosslinked with siloxane (provided by a new crosslinking agent: 3-(glycid oxypropyl) trimethoxysilane) with biologically active molecules, such as enzymes (lysozyme) and drugs (propranolol, quinidine) was studied. The anionic amphiphilic supports retained through electrostatic and/or hydrophobic forces, variable amounts of the substances as a function of their structure, such as crosslinking degree and amount of uncrosslinked alkylsilane chains. The absorption of lysozyme on the supports followed the Langmuir isotherm, which allowed the calculation of constants k1 and k2. Both retention and in vitro release behavior of these support potential applications in controlled drug release as well as immobilization and purification of enzymes.
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Affiliation(s)
- Georgeta Mocanu
- 'Petru Poni' Institute of Macromolecular Chemistry 700487, Iasi, Romania,
| | - Doina Mihai
- 'Petru Poni' Institute of Macromolecular Chemistry 700487, Iasi, Romania
| | - Mélanie Legros
- UMR 6522 CNRS Université de Rouen, 76821 Mont Saint, Aignan, France
| | - Luc Picton
- UMR 6522 CNRS Université de Rouen, 76821 Mont Saint, Aignan, France
| | - Didier Lecerf
- UMR 6522 CNRS Université de Rouen, 76821 Mont Saint, Aignan, France
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Constantin M, Fundueanu G, Bortolotti F, Cortesi R, Ascenzi P, Menegatti E. A novel multicompartimental system based on aminated poly(vinyl alcohol) microspheres/succinoylated pullulan microspheres for oral delivery of anionic drugs. Int J Pharm 2007; 330:129-37. [PMID: 17027206 DOI: 10.1016/j.ijpharm.2006.09.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2005] [Revised: 09/07/2006] [Accepted: 09/09/2006] [Indexed: 11/23/2022]
Abstract
Poly(vinyl alcohol) (PVA) microspheres were prepared by dispersion reticulation with glutaraldehyde and further aminated. These microspheres were firstly loaded with diclofenac (DF) and then entrapped in cellulose acetate butyrate (CAB) microcapsules by an o/w solvent evaporation technique for intestinal delivery of drug. The encapsulated PVA microspheres due to their low swelling degree in intestinal fluids, do not have enough force to produce the disruption of CAB shell, therefore different amounts of succinoylated pullulan microspheres (SP-Ms) (exchange capacity up to 5.2 meq/g) were co-encapsulated. The SP-Ms do not swell in acidic pH, but swell up to 20-times in intestinal fluids causing the rupture of CAB shell and facilitating the escape of loaded PVA microspheres.
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Affiliation(s)
- M Constantin
- Department of Bioactive and Biocompatible Polymers, Petru Poni Institute of Macromolecular Chemistry, 700487 Iassy, Romania
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Coviello T, Matricardi P, Marianecci C, Alhaique F. Polysaccharide hydrogels for modified release formulations. J Control Release 2007; 119:5-24. [PMID: 17382422 DOI: 10.1016/j.jconrel.2007.01.004] [Citation(s) in RCA: 574] [Impact Index Per Article: 33.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2006] [Accepted: 01/04/2007] [Indexed: 12/23/2022]
Abstract
Hydrogels are three-dimensional, hydrophilic, polymeric networks, with chemical or physical cross-links, capable of imbibing large amounts of water or biological fluids. Among the numerous macromolecules that can be used for hydrogel formation, polysaccharides are extremely advantageous compared to synthetic polymers being widely present in living organisms and often being produced by recombinant DNA techniques. Coming from renewable sources, polysaccharides also have frequently economical advantages over synthetic polymers. Polysaccharides are usually non-toxic, biocompatible and show a number of peculiar physico-chemical properties that make them suitable for different applications in drug delivery systems. We review here a selection of the most important polysaccharides that have been studied and exploited in several fields related to pharmaceutics. Particular attention has been focused on the techniques used for the hydrogel network preparation, on the drug delivery results, on clinical applications as well as on the possible use of such systems as scaffolds for tissue engineering.
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Coviello T, Matricardi P, Alhaique F. Drug delivery strategies using polysaccharidic gels. Expert Opin Drug Deliv 2006; 3:395-404. [PMID: 16640499 DOI: 10.1517/17425247.3.3.395] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Hydrogels are hydrophilic polymeric networks, with chemical or physical crosslinks, that are capable of swell and can retain a large amount of water. Among the numerous types of macromolecules that can be used for hydrogel formation, polysaccharides show very attractive advantages in comparison to synthetic polymers. They are widely present in living organisms, are usually abundant and show a number of peculiar physicochemical properties; furthermore, these macromolecules are, in most cases, non-toxic, biocompatible and can be obtained from renewable sources. For these reasons, polysaccharides seem to be particularly suitable for different applications in the wide field of pharmaceutics. As examples of the studies that have been carried out on this topic, this review will focus on two polysaccharides, alginate and xyloglucan. Alginate has been, and still is, extensively investigated and has numerous industrial applications, whereas xyloglucan was chosen because, although it has been much less studied, it shows interesting properties that should find important practical uses in the near future. The possible advantages of physical gels over those that are chemically crosslinked are also discussed.
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Affiliation(s)
- Tommasina Coviello
- University La Sapienza, Faculty of Pharmacy, P le Aldo Moro 5, 00185 Rome, Italy.
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