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Girard-Perier N, Marque SRA, Dupuy N, Krieguer B, Dorey S. Gamma, E-Beam and X-ray Irradiations on PE/EVOH/PE Multilayer Film: An Industrial Point of View Regarding the Impact on Mechanical Properties. Polymers (Basel) 2023; 15:2799. [PMID: 37447445 DOI: 10.3390/polym15132799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/31/2023] [Accepted: 06/16/2023] [Indexed: 07/15/2023] Open
Abstract
X-ray and electron-beam (E-beam) sterilization technologies were assessed to supplement gamma sterilization, the most common radiation technology used today for biopharmaceutical product sterilization. The mechanical properties of a PE/EVOH/PE film were studied using tensile tests and dynamical mechanical analysis after each irradiation technology (i.e., gamma, electron beam and X-ray irradiations). The effects of each irradiation were compared using two statistical methods. The results indicate that the three irradiation technologies induce no difference in mechanical properties in the investigated dose range for this material.
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Affiliation(s)
- Nina Girard-Perier
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, CEDEX, 13781 Aubagne, France
| | | | - Nathalie Dupuy
- Aix Marseille Univ, Avignon Université, CNRS, IRD, IMBE, 13013 Marseille, France
| | - Blanche Krieguer
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, CEDEX, 13781 Aubagne, France
- Aix Marseille Univ, CNRS, ICR, Case 551, 13397 Marseille, France
- Aix Marseille Univ, Avignon Université, CNRS, IRD, IMBE, 13013 Marseille, France
| | - Samuel Dorey
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, CEDEX, 13781 Aubagne, France
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2
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Pranav HA, Sudarshan B, Joshi SN. Effect of shock wave impact on natural chitosan biopolymer. INTERNATIONAL JOURNAL OF POLYMER ANALYSIS AND CHARACTERIZATION 2022. [DOI: 10.1080/1023666x.2022.2146917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- H. A. Pranav
- Department of Mechanical Engineering, B.M.S. College of Engineering, Bangalore, India
| | - B. Sudarshan
- Department of Mechanical Engineering, B.M.S. College of Engineering, Bangalore, India
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3
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Girard-Perier N, Marque SRA, Dupuy N, Claeys-Bruno M, Gaston F, Dorey S, Fifield LS, Ni Y, Li D, Fuchs WK, Murphy MK, Pillai SD, Pharr M, Nichols L. Effects of X-Rays, Electron Beam, and Gamma Irradiation on Chemical and Physical Properties of EVA Multilayer Films. Front Chem 2022; 10:888285. [PMID: 35646817 PMCID: PMC9131251 DOI: 10.3389/fchem.2022.888285] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
Gamma-ray irradiation, using the cobalt-60 isotope, is the most common radiation modality used for medical device and biopharmaceutical products sterilization. Although X-ray and electron-beam (e-beam) sterilization technologies are mature and have been in use for decades, impediments remain to switching to these sterilization modalities because of lack of data on the resulting radiation effects for the associated polymers, as well as a lack of education for manufacturers and regulators on the viability of these sterilization alternatives. For this study, the compatibility of ethylene vinyl acetate (EVA) multilayer films with different ionizing radiation sterilization (X-ray, e-beam, and gamma irradiation) is determined by measuring chemical and physical film properties using high performance liquid chromatography, differential scanning calorimetry, Fourier-Transform InfraRed spectroscopy (FTIR), surface energy measurement, and electron spin resonance techniques. The results indicate that the three irradiation modalities induce no differences in thermal properties in the investigated dose range. Gamma and X-Ray irradiations generate the same level of reactive species in the EVA multilayer film, whereas e-beam generates a reduced quantity of reactive species.
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Affiliation(s)
| | - Sylvain R. A. Marque
- Case 551, CNRS, ICR, Aix Marseille University, Marseille, France
- *Correspondence: Sylvain R. A. Marque, ; Nathalie Dupuy, ; Samuel Dorey, ; Leonard S. Fifield,
| | - Nathalie Dupuy
- CNRS, IRD, IMBE, Aix Marseille University, Avignon Université, Marseille, France
- *Correspondence: Sylvain R. A. Marque, ; Nathalie Dupuy, ; Samuel Dorey, ; Leonard S. Fifield,
| | - Magalie Claeys-Bruno
- CNRS, IRD, IMBE, Aix Marseille University, Avignon Université, Marseille, France
| | | | - Samuel Dorey
- Sartorius Stedim FMT S. A. S., Aubagne, France
- *Correspondence: Sylvain R. A. Marque, ; Nathalie Dupuy, ; Samuel Dorey, ; Leonard S. Fifield,
| | - Leonard S. Fifield
- Pacific Northwest National Laboratory, Richland, WA, United States
- *Correspondence: Sylvain R. A. Marque, ; Nathalie Dupuy, ; Samuel Dorey, ; Leonard S. Fifield,
| | - Yelin Ni
- Pacific Northwest National Laboratory, Richland, WA, United States
| | - Donghui Li
- Pacific Northwest National Laboratory, Richland, WA, United States
| | - Witold K. Fuchs
- Pacific Northwest National Laboratory, Richland, WA, United States
| | - Mark K. Murphy
- Pacific Northwest National Laboratory, Richland, WA, United States
| | - Suresh D. Pillai
- National Center for Electron Beam Research, Texas A&M University, College Station, TX, United States
| | - Matt Pharr
- National Center for Electron Beam Research, Texas A&M University, College Station, TX, United States
- Department of Mechanical Engineering, Texas A&M University, College Station, TX, United States
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4
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Wu J, Sahoo JK, Li Y, Xu Q, Kaplan DL. Challenges in delivering therapeutic peptides and proteins: A silk-based solution. J Control Release 2022; 345:176-189. [PMID: 35157939 PMCID: PMC9133086 DOI: 10.1016/j.jconrel.2022.02.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 02/07/2022] [Accepted: 02/08/2022] [Indexed: 02/06/2023]
Abstract
Peptide- and protein-based therapeutics have drawn significant attention over the past few decades for the treatment of infectious diseases, genetic disorders, oncology, and many other clinical needs. Yet, protecting peptide- and protein-based drugs from degradation and denaturation during processing, storage and delivery remain significant challenges. In this review, we introduce the properties of peptide- and protein-based drugs and the challenges associated with their stability and delivery. Then, we discuss delivery strategies using synthetic polymers and their advantages and limitations. This is followed by a focus on silk protein-based materials for peptide/protein drug processing, storage, and delivery, as a path to overcome stability and delivery challenges with current systems.
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Affiliation(s)
- Junqi Wu
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Jugal Kishore Sahoo
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Yamin Li
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
| | - Qiaobing Xu
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA.
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA.
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5
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Vasile C, Pamfil D, Zaharescu T, Dumitriu RP, Pricope GM, Râpă M, Vasilievici G. Effect of Gamma Irradiation on the PLA-Based Blends and Biocomposites Containing Rosemary Ethanolic Extract and Chitosan. Polymers (Basel) 2022; 14:polym14071398. [PMID: 35406271 PMCID: PMC9002816 DOI: 10.3390/polym14071398] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/25/2022] [Accepted: 03/26/2022] [Indexed: 11/20/2022] Open
Abstract
The irradiation of polymeric materials with ionizing radiation (γ-rays, X-rays, accelerated electrons, ion beams, etc.) may lead to disproportion, hydrogen abstraction, arrangements, degradation, and/or the formation of new bonds. The purpose of this paper is to evaluate the effect of gamma irradiation on some new poly(lactic acid) (PLA)-based blends and biocomposites, which is crucial when they are used for food packaging or medical purposes. The polymeric blends and biocomposites based on PLA and rosemary ethanolic extract (R) and poly(ethylene glycol) (PEG) (20 wt%) plasticized PLA, chitosan (CS) (3–6 wt%) and R (0.5 wt%) biocomposites were subjected to gamma irradiation treatment using three low γ-doses of 10, 20, and 30 kGy. The effect of irradiation was evaluated by Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), thermogravimetry (TG), chemiluminescence method (CL), migration studies, and antibacterial activity tests. It was found that in comparison with neat PLA, the gamma irradiation in the oxidative conditions of the PLA-based blends and biocomposites, causes modifications in the structure, morphology, and thermal properties of the materials depending on irradiation dose and the presence of natural additives such as rosemary and chitosan. It was established that under a gamma-irradiation treatment with dose of 10–20 kGy, the PLA materials showed minor changes in structure and properties being suitable for application in packaging and in addition after irradiation with such doses their antimicrobial activity against Escherichia coli, Staphylococcus aureus, and Salmonella typhimurium is improved.
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Affiliation(s)
- Cornelia Vasile
- Physical Chemisytry of Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry (PPIMC), 700487 Iasi, Romania;
- Correspondence: (C.V.); (D.P.)
| | - Daniela Pamfil
- Physical Chemisytry of Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry (PPIMC), 700487 Iasi, Romania;
- Correspondence: (C.V.); (D.P.)
| | - Traian Zaharescu
- National Institute for Electrical Engineering (INCDIE ICPE CA), 030138 Bucharest, Romania;
| | - Raluca-Petronela Dumitriu
- Physical Chemisytry of Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry (PPIMC), 700487 Iasi, Romania;
| | - Gina Mihaela Pricope
- Veterinary and Food Safety Laboratory, Food Safety Department, 700489 Iasi, Romania;
| | - Maria Râpă
- Faculty of Materials Science and Engineering, Politehnica University of Bucharest (UPB), 060042 Bucharest, Romania; or
| | - Gabriel Vasilievici
- National Institute for Research & Development in Chemistry and Petrochemistry (INCDCP-ICECHIM), 060021 Bucharest, Romania;
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Girard-Perier N, Claeys-Bruno M, Marque SR, Dupuy N, Gaston F, Dorey S. Monitoring of peroxide in gamma irradiated PE/EVOH/PE multilayer film using methionine probe. FOOD AND BIOPRODUCTS PROCESSING 2022. [DOI: 10.1016/j.fbp.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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7
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Girard-Perier N, Claeys-Bruno M, Marque SRA, Dupuy N, Gaston F, Dorey S. Effects of X-ray, electron beam and gamma irradiation on PE/EVOH/PE multilayer film properties. Chem Commun (Camb) 2021; 57:11049-11051. [PMID: 34608899 DOI: 10.1039/d1cc02871e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To increase sterilization capacity, X-ray and e-beam irradiation modalities are more and more attractive for the indutrial sterilization of heathcare products (medical devices and biopharmaceutical goods). However, no study comparing these different techniques are available concerning multi-layer films. Thus, with the PE/EVOH/PE multilayer film as a model, we show that, whatever the modality of irradiation, the thermal properties are not significantly changed as shown by DSC, and, as such, the physical and mechanical properties of this material are also expected to behave similarly. On the other hand, chemical properties such as oxidation ability are strikingly modified, i.e., the same oxidation level for X-ray and γ-irradiation and twice weaker for e-beam irradiation.
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Affiliation(s)
- Nina Girard-Perier
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, Aubagne Cedex 13781, France.
| | | | | | - Nathalie Dupuy
- Aix Marseille Univ, Avignon Univ, CNRS, IRD, IMBE, Marseille, France.
| | - Fanny Gaston
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, Aubagne Cedex 13781, France.
| | - Samuel Dorey
- Sartorius Stedim FMT S.A.S, Z.I. Les Paluds, Avenue de Jouques CS91051, Aubagne Cedex 13781, France.
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8
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Shape fidelity and sterility assessment of 3D printed polycaprolactone and hydroxyapatite scaffolds. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02675-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AbstractPolycaprolactone (PCL) and hydroxyapatite (HA) composite are widely used in tissue engineering (TE). They are fit to being processed with three-dimensional (3D) printing technique to create scaffolds with verifiable porosity. The current challenge is to guarantee the reliability and reproducibility of 3D printed scaffolds and to create sterile scaffolds which can be used for in vitro cell cultures. In this context it is important for successful cell culture, to have a protocol in order to evaluate the sterility of the printed scaffolds. We proposed a systematic approach to sterilise 90%PCL-10%HA pellets using a 3D bioprinter before starting the printing process. We evaluated the printability of PCL-HA composite and the shape fidelity of scaffolds printed with and without sterilised pellets varying infill pattern, and the sterility of 3D printed scaffolds following the method established by the United States Pharmacopoeia. Finally, the thermal analyses supported by the Fourier Transform Infrared Spectroscopy were useful to verify the stability of the sterilisation process in the PCL solid state with and without HA. The results show that the use of the 3D printer, according to the proposed protocol, allows to obtain sterile 3D PCL-HA scaffolds suitable for TE applications such as bone or cartilage repair.
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9
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Domańska IM, Oledzka E, Sobczak M. Sterilization process of polyester based anticancer-drug delivery systems. Int J Pharm 2020; 587:119663. [PMID: 32702451 DOI: 10.1016/j.ijpharm.2020.119663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 07/02/2020] [Accepted: 07/14/2020] [Indexed: 01/07/2023]
Abstract
Recently, growing interest in biodegradable polyesters as drug carriers in the development of innovative anticancer drug delivery systems (DDSs) has been observed. These compounds are thermally unstable, and are therefore, particularly demanding due to the limited number of available sterilization techniques. Furthermore, the DDSs sterilization process is often limited to aseptic filtration. Ensuring aseptic production is very demanding and costly, and it is therefore necessary to work on the application of new sterilization methods. In view of this, this review presents the current state of knowledge regarding the radiation sterilization process of some anticancer drugs as well biodegradable polyester carriers (such as polylactide, polyglycolide, poly(ε-caprolactone), poly(trimethylene carbonate) and co- or terpolymers of lactide, glycolide, ε-caprolactone and trimethylene carbonate). The structural changes in anticancer DDSs under the influence of ionizing radiation and the potential degradation mechanisms of both, polyester carriers and cytostatics during the sterilization process of ionizing radiation as well as their effects on the microstructure and properties of DDSs have been discussed in this paper.
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Affiliation(s)
- Izabela M Domańska
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., Warsaw 02-097, Poland.
| | - Ewa Oledzka
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., Warsaw 02-097, Poland.
| | - Marcin Sobczak
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, 1 Banacha St., Warsaw 02-097, Poland.
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10
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Milicevic D, Suljovrujic E. The resistance of poly-(l-lactide) to gamma radiation: effect of initial preparation and crystallinity. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-019-02880-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Girard-Perier N, Dorey S, Marque SR, Dupuy N. Mapping the scientific research on the gamma irradiated polymers degradation (1975–2018). Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Composite poly(DL-lactide-co-glycolide)/poly(acrylic acid) hydrogels synthesized using UV and gamma irradiation: comparison of material properties. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Haryadi BM, Hafner D, Amin I, Schubel R, Jordan R, Winter G, Engert J. Nonspherical Nanoparticle Shape Stability Is Affected by Complex Manufacturing Aspects: Its Implications for Drug Delivery and Targeting. Adv Healthc Mater 2019; 8:e1900352. [PMID: 31410996 DOI: 10.1002/adhm.201900352] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/05/2019] [Indexed: 02/04/2023]
Abstract
The shape of nanoparticles is known recently as an important design parameter influencing considerably the fate of nanoparticles with and in biological systems. Several manufacturing techniques to generate nonspherical nanoparticles as well as studies on in vitro and in vivo effects thereof have been described. However, nonspherical nanoparticle shape stability in physiological-related conditions and the impact of formulation parameters on nonspherical nanoparticle resistance still need to be investigated. To address these issues, different nanoparticle fabrication methods using biodegradable polymers are explored to produce nonspherical nanoparticles via the prevailing film-stretching method. In addition, systematic comparisons to other nanoparticle systems prepared by different manufacturing techniques and less biodegradable materials (but still commonly utilized for drug delivery and targeting) are conducted. The study evinces that the strong interplay from multiple nanoparticle properties (i.e., internal structure, Young's modulus, surface roughness, liquefaction temperature [glass transition (Tg ) or melting (Tm )], porosity, and surface hydrophobicity) is present. It is not possible to predict the nonsphericity longevity by merely one or two factor(s). The most influential features in preserving the nonsphericity of nanoparticles are existence of internal structure and low surface hydrophobicity (i.e., surface-free energy (SFE) > ≈55 mN m-1 , material-water interfacial tension <6 mN m-1 ), especially if the nanoparticles are soft (<1 GPa), rough (Rrms > 10 nm), porous (>1 m2 g-1 ), and in possession of low bulk liquefaction temperature (<100 °C). Interestingly, low surface hydrophobicity of nanoparticles can be obtained indirectly by the significant presence of residual stabilizers. Therefore, it is strongly suggested that nonsphericity of particle systems is highly dependent on surface chemistry but cannot be appraised separately from other factors. These results and reviews allot valuable guidelines for the design and manufacturing of nonspherical nanoparticles having adequate shape stability, thereby appropriate with their usage purposes. Furthermore, they can assist in understanding and explaining the possible mechanisms of nonspherical nanoparticles effectivity loss and distinctive material behavior at the nanoscale.
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Affiliation(s)
- Bernard Manuel Haryadi
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Daniel Hafner
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Ihsan Amin
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rene Schubel
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rainer Jordan
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Gerhard Winter
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Julia Engert
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
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Limitations in predicting radiation-induced pharmaceutical instability during long-duration spaceflight. NPJ Microgravity 2019; 5:15. [PMID: 31231677 PMCID: PMC6554299 DOI: 10.1038/s41526-019-0076-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 05/07/2019] [Indexed: 12/02/2022] Open
Abstract
As human spaceflight seeks to expand beyond low-Earth orbit, NASA and its international partners face numerous challenges related to ensuring the safety of their astronauts, including the need to provide a safe and effective pharmacy for long-duration spaceflight. Historical missions have relied upon frequent resupply of onboard pharmaceuticals; as a result, there has been little study into the effects of long-term exposure of pharmaceuticals to the space environment. Of particular concern are the long-term effects of space radiation on drug stability, especially as missions venture away from the protective proximity of the Earth. Here we highlight the risk of space radiation to pharmaceuticals during exploration spaceflight, identifying the limitations of current understanding. We further seek to identify ways in which these limitations could be addressed through dedicated research efforts aimed toward the rapid development of an effective pharmacy for future spaceflight endeavors.
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15
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Budimir M, Marković Z, Jovanović D, Vujisić M, Mičušík M, Danko M, Kleinová A, Švajdlenková H, Špitalský Z, Marković BT. Gamma ray assisted modification of carbon quantum dot/polyurethane nanocomposites: structural, mechanical and photocatalytic study. RSC Adv 2019; 9:6278-6286. [PMID: 35517258 PMCID: PMC9060942 DOI: 10.1039/c9ra00500e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/17/2020] [Accepted: 02/15/2019] [Indexed: 11/25/2022] Open
Abstract
In recent years, water pollution and contamination had become a major threat to the ecosystem. However, the use of nanostructured materials has been proven as a very promising approach in the treatment of polluted water. The present study reports the results of the gamma ray-assisted modification of hydrophobic carbon quantum dot (hCQD)/polyurethane nanocomposites for photocatalytic degradation of organic dyes. Different characterization methods were applied to investigate the influence of the different doses of gamma irradiation (1, 10 and 200 kGy) on the physical and chemical properties of nanocomposites (morphology, chemical content, mechanical properties, wettability, and potential for singlet oxygen generation). Surface morphology and mechanical properties analyses showed that gamma rays induced insignificant changes in the structure of nanocomposites, but the potential for singlet oxygen generation increased significantly. Here we also explore, in detail, the photocatalytic properties of gamma-ray modified hCQDs/polyurethane nanocomposites. UV-vis analysis showed that the removal efficiency of the rose bengal dye reached up to 97% for the nanocomposite irradiated with the dose of 200 kGy. The present study reports the results of the gamma ray-assisted modification of hydrophobic carbon quantum dots (hCQDs)/polyurethane nanocomposites for photocatalytic degradation of organic dyes.![]()
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Affiliation(s)
- Milica Budimir
- Vinča Institute of Nuclear Sciences
- University of Belgrade
- 11001 Belgrade
- Serbia
- School of Electrical Engineering
| | - Zoran Marković
- Vinča Institute of Nuclear Sciences
- University of Belgrade
- 11001 Belgrade
- Serbia
| | - Dragana Jovanović
- Vinča Institute of Nuclear Sciences
- University of Belgrade
- 11001 Belgrade
- Serbia
| | - Miloš Vujisić
- School of Electrical Engineering
- University of Belgrade
- 11000 Belgrade
- Serbia
| | - Matej Mičušík
- Polymer Institute
- Slovak Academy of Sciences
- 84541 Bratislava
- Slovakia
| | - Martin Danko
- Polymer Institute
- Slovak Academy of Sciences
- 84541 Bratislava
- Slovakia
| | - Angela Kleinová
- Polymer Institute
- Slovak Academy of Sciences
- 84541 Bratislava
- Slovakia
| | | | - Zdeno Špitalský
- Polymer Institute
- Slovak Academy of Sciences
- 84541 Bratislava
- Slovakia
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16
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Evaluation of Sterilisation Techniques for Regenerative Medicine Scaffolds Fabricated with Polyurethane Nonbiodegradable and Bioabsorbable Nanocomposite Materials. Int J Biomater 2018; 2018:6565783. [PMID: 30405715 PMCID: PMC6192142 DOI: 10.1155/2018/6565783] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/18/2018] [Accepted: 08/09/2018] [Indexed: 12/31/2022] Open
Abstract
An effective sterilisation technique that maintains structure integrity, mechanical properties, and biocompatibility is essential for the translation of new biomaterials to the clinical setting. We aimed to establish an effective sterilisation technique for a biodegradable (POSS-PCL) and nonbiodegradable (POSS-PCU) nanocomposite scaffold that maintains stem cell biocompatibility. Scaffolds were sterilised using 70% ethanol, ultraviolet radiation, bleach, antibiotic/antimycotic, ethylene oxide, gamma irradiation, argon plasma, or autoclaving. Samples were immersed in tryptone soya broth and thioglycollate medium and inspected for signs of microbial growth. Scaffold surface and mechanical and molecular weight properties were investigated. AlamarBlue viability assay of adipose derived stem cells (ADSC) seeded on scaffolds was performed to investigate metabolic activity. Confocal imaging of rhodamine phalloidin and DAPI stained ADSCs was performed to evaluate morphology. Ethylene oxide, gamma irradiation, argon plasma, autoclaving, 70% ethanol, and bleach were effective in sterilising the scaffolds. Autoclaving, gamma irradiation, and ethylene oxide led to a significant change in the molecular weight distribution of POSS-PCL and gamma irradiation and ethylene oxide to that of POSS-PCU (p<0.05). UV, ethanol, gamma irradiation, and ethylene oxide caused significant changes in the mechanical properties of POSS-PCL (p<0.05). Argon was associated with significantly higher surface wettability and ADSC metabolic activity (p<0.05). In this study, argon plasma was an effective sterilisation technique for both nonbiodegradable and biodegradable nanocomposite scaffolds. Argon plasma should be further investigated as a potential sterilisation technique for medical devices.
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17
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Hydrogel wound dressings loaded with PLGA/ciprofloxacin hydrochloride nanoparticles for use on pressure ulcers. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.06.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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18
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19
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The Influence of Pulsed Electron Beam Treatment on Properties of PLLA Nonwoven Materials Produced by Solution Blow Spinning. BIONANOSCIENCE 2017. [DOI: 10.1007/s12668-017-0436-9] [Citation(s) in RCA: 4] [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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20
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Zhao Y, Han L, Yan J, Li Z, Wang F, Xia Y, Hou S, Zhong H, Zhang F, Gu N. Irradiation Sterilized Gelatin-Water-Glycerol Ternary Gel as an Injectable Carrier for Bone Tissue Engineering. Adv Healthc Mater 2017; 6. [PMID: 27863162 DOI: 10.1002/adhm.201600749] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 09/29/2016] [Indexed: 12/18/2022]
Abstract
Injectable gelatin gels offer an attractive option for filling bone defects. The challenge is to fabricate gelatin gels with optimal gelation properties, which can be irradiation sterilized. Here, a gelatin-water-glycerol (GWG) gel is reported for use as a broad-spectrum injectable carrier. This ternary gel is high in glycerol and low in water, and remains stable after gamma irradiation at doses (25 kGy). As an injectable gel, it remains a viscous solution at gelatin concentrations ≤2.0%, at room temperature. Its storage modulus increases dramatically and eventually exceeds the loss modulus around 46-50 °C, indicating a transition from a liquid-like state to an elastic gel-like state. This ternary gel ranges significantly in terms of storage modulus (12-1700 Pa) while demonstrating a narrow pH range (5.58-5.66), depending on the gelatin concentration. Therefore, it can be loaded with a variety of materials. It is highly cytocompatible compared with saline in vivo and culture media in vitro. When loaded with demineralized bone matrix, the composites show favorable injectability, and excellent osteogenesis performance, after irradiation. These features can be attributed to high hydrophilicity and fast degradability. These findings justify that this ternary gel is promising as an irradiation-sterilized and universal injectable delivery system.
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Affiliation(s)
- Yantao Zhao
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Liwei Han
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Jun Yan
- School of Stomatology; Fourth Military Medical University; Xi'an 710032 P. R. China
| | - Zhonghai Li
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Fuli Wang
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Yang Xia
- Jiangsu Key Laboratory of Oral Diseases; Nanjing Medical University; Nanjing 210029 P. R. China
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
| | - Shuxun Hou
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Hongbin Zhong
- Beijing Engineering Research Center of Orthopaedic Implants; First Affiliated Hospital of CPLA General Hospital; Beijing 100048 P. R. China
| | - Feimin Zhang
- Jiangsu Key Laboratory of Oral Diseases; Nanjing Medical University; Nanjing 210029 P. R. China
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
| | - Ning Gu
- Suzhou Institute & Collaborative Innovation Center of Suzhou Nano Science and Technology; Southeast University; Suzhou 215000 P. R. China
- State Key Laboratory of Bioelectronics; Jiangsu Key Laboratory of Biomaterials and Devices; School of Biological Science and Medical Engineering; Southeast University; Nanjing 210009 P. R. China
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Rafienia M, Mirzadeh H, Mirzadeh H, Mobedi H, Jamshidi A. In Vitro Evaluation of Drug Solubility and Gamma Irradiation on the Release of Betamethasone under Simulated In Vivo Conditions. J BIOACT COMPAT POL 2016. [DOI: 10.1177/0883911507080110] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In situ—forming biodegradable polymeric systems loaded with betamethasone (BTM) and betamethasone acetate (BTMA) (5, 7, and 10% (w/w)) were prepared using poly(DL-lactide-co-glycolide) (33% (w/w)), ethyl heptanoate (5% (w/w)), and N-methyl-2-pyrrolidone as biodegradable material, additive, and solvent, respectively. The effects of gamma irradiation, drug loading, and solvent removal on release profiles were evaluated. The drug release in phosphate-buffered solution (pH = 7.4, 37°C) was measured using high-performance liquid chromatography. The release profiles of irradiated and nonirradiated formulations based on BTMA showed a three-phase release pattern, whereas the pattern for BTM was biphasic. Gamma irradiation had no significant effect on the BTMA release profiles ( p>0.05). Unexpectedly, irradiation had a significant effect on release behavior of BTM ( p<0.05); also, the rate of BTM release was decreased with an increase in drug loading up to 10%. The amount of BTM that was released in the burst phase decreased by about 1.4 and 1.5 times for 7 and 10% BTM loading, respectively. The duration of BTM release was more than that of BTMA. Changes in hydrophobicity and hydrogen bonding had a strong effect on the release behavior of the two forms of BTM from the in situ—forming systems.
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Affiliation(s)
- Mohammad Rafienia
- Biomedical Engineering Department, Amirkabir University of Technology, Tehran 15875-4413, Iran
| | - Hamid Mirzadeh
- Biomedical Engineering Department, Amirkabir University of Technology, Tehran 15875-4413, Iran,
| | - Hamid Mirzadeh
- Iran Polymer and Petrochemical Institute, NDDS Research Department, Tehran 14965-115, Iran
| | - Hamid Mobedi
- Iran Polymer and Petrochemical Institute, NDDS Research Department, Tehran 14965-115, Iran
| | - Ahmad Jamshidi
- Iran Polymer and Petrochemical Institute, NDDS Research Department, Tehran 14965-115, Iran
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22
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Xu Y, Kim CS, Saylor DM, Koo D. Polymer degradation and drug delivery in PLGA-based drug-polymer applications: A review of experiments and theories. J Biomed Mater Res B Appl Biomater 2016; 105:1692-1716. [PMID: 27098357 DOI: 10.1002/jbm.b.33648] [Citation(s) in RCA: 223] [Impact Index Per Article: 27.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/25/2016] [Accepted: 02/12/2016] [Indexed: 01/03/2023]
Abstract
Poly (lactic-co-glycolic acid) (PLGA) copolymers have been broadly used in controlled drug release applications. Because these polymers are biodegradable, they provide an attractive option for drug delivery vehicles. There are a variety of material, processing, and physiological factors that impact the degradation rates of PLGA polymers and concurrent drug release kinetics. This work is intended to provide a comprehensive and collective review of the physicochemical and physiological factors that dictate the degradation behavior of PLGA polymers and drug release from contemporary PLGA-based drug-polymer products. In conjunction with the existing experimental results, analytical and numerical theories developed to predict drug release from PLGA-based polymers are summarized and correlated with the experimental observations. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 105B: 1692-1716, 2017.
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Affiliation(s)
- Yihan Xu
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - Chang-Soo Kim
- Materials Science and Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin, 53211
| | - David M Saylor
- Division of Biology, Chemistry, and Materials Science, Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, Maryland, 20993
| | - Donghun Koo
- Materials Science R&D, MilliporeSigma, Milwaukee, Wisconsin, 53209
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Rediguieri CF, de Jesus Andreoli Pinto T, Bou-Chacra NA, Galante R, de Araújo GLB, do Nascimento Pedrosa T, Maria-Engler SS, De Bank PA. Ozone Gas as a Benign Sterilization Treatment for PLGA Nanofiber Scaffolds. Tissue Eng Part C Methods 2016; 22:338-47. [PMID: 26757850 PMCID: PMC4827278 DOI: 10.1089/ten.tec.2015.0298] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 01/11/2016] [Indexed: 01/10/2023] Open
Abstract
The use of electrospun nanofibers for tissue engineering and regenerative medicine applications is a growing trend as they provide improved support for cell proliferation and survival due, in part, to their morphology mimicking that of the extracellular matrix. Sterilization is a critical step in the fabrication process of implantable biomaterial scaffolds for clinical use, but many of the existing methods used to date can negatively affect scaffold properties and performance. Poly(lactic-co-glycolic acid) (PLGA) has been widely used as a biodegradable polymer for 3D scaffolds and can be significantly affected by current sterilization techniques. The aim of this study was to investigate pulsed ozone gas as an alternative method for sterilizing PLGA nanofibers. The morphology, mechanical properties, physicochemical properties, and response of cells to PLGA nanofiber scaffolds were assessed following different degrees of ozone gas sterilization. This treatment killed Geobacillus stearothermophilus spores, the most common biological indicator used for validation of sterilization processes. In addition, the method preserved all of the characteristics of nonsterilized PLGA nanofibers at all degrees of sterilization tested. These findings suggest that ozone gas can be applied as an alternative method for sterilizing electrospun PLGA nanofiber scaffolds without detrimental effects.
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Affiliation(s)
- Carolina Fracalossi Rediguieri
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Agência Nacional de Vigilância Sanitária, Brasília, Brasil
| | | | - Nadia Araci Bou-Chacra
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Raquel Galante
- Departamento de Farmácia, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | | | - Tatiana do Nascimento Pedrosa
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Silvya Stuchi Maria-Engler
- Departamento de Análises Clínicas e Toxicológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Paul A. De Bank
- Department of Pharmacy & Pharmacology and Centre for Regenerative Medicine, University of Bath, Bath, United Kingdom
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24
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Naderi N, Griffin M, Malins E, Becer R, Mosahebi A, Whitaker IS, Seifalian AM. Slow chlorine releasing compounds: A viable sterilisation method for bioabsorbable nanocomposite biomaterials. J Biomater Appl 2015; 30:1114-24. [DOI: 10.1177/0885328215613666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Objective Selection of the appropriate sterilisation method for biodegradable materials has been a challenging task. Many conventional sterilisation methods are not suitable for the next generation of biomaterials, mainly due to their complex composition, based on nanomaterials, often incorporating bioactive moieties. In this study, we investigate sterilisation efficacy of slow chlorine releasing compound sodium dichloroisocyanurate dihydrate (SDIC) for polyhedral oligomeric silsesquioxane (POSS)-poly(caprolactone urea-urethane) (PCL) scaffolds in comparison with conventional sterilisation methods. Methods POSS-PCL scaffolds were subjected to 70% ethanol, UV, and SDIC sterilisation methods. Samples were immersed in tryptone soya broth (TSB) and thioglycollate medium (THY) and after seven days visually inspected for signs of microbial growth. Bulk and surface properties and molecular weight distribution profiles of the scaffolds after sterilization were investigated using FTIR analysis, surface hydrophilicity, scanning electron microscopy analysis, tensile strength testing, and gel-permeation chromatography (GPC). Adipose-derived stem cells (ADSC) were seeded on the scaffolds and AlamarBlue® viability assay was performed to investigate cell metabolic activity. Confocal imaging of rhodamine phalloidin and Dapi stained ADSC on scaffolds was used to demonstrate cell morphology. Results GPC results showed that autoclaving led to a significant decrease in the molecular weight of POSS-PCL, whereas ethanol caused visible deformation of the polymer 3D structure and UV radiation did not effectively sterilise the scaffolds. AlamarBlue® analysis showed metabolic activity close to that of tissue culture plastic for ethanol and SDIC. Conclusion SDIC sterilisation can be safely applied to biodegradable scaffolds unsuitable for the more common sterilisation methods.
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Affiliation(s)
- Naghmeh Naderi
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS), Swansea University Medical School, Swansea, UK
- Welsh Centre for Burns & Plastic Surgery, ABMU Health Board, Swansea, UK
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
| | - Michelle Griffin
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
| | - Edward Malins
- Polymer Chemistry Laboratory, School of Engineering and Materials Science, Queen Mary, University of London, London, UK
| | - Remzi Becer
- Polymer Chemistry Laboratory, School of Engineering and Materials Science, Queen Mary, University of London, London, UK
| | - Afshin Mosahebi
- Department of Plastic Surgery, Royal Free London NHS Foundation Trust, London, UK
| | - Iain S Whitaker
- Reconstructive Surgery & Regenerative Medicine Group, Institute of Life Sciences (ILS), Swansea University Medical School, Swansea, UK
- Welsh Centre for Burns & Plastic Surgery, ABMU Health Board, Swansea, UK
| | - Alexander M Seifalian
- UCL Centre for Nanotechnology & Regenerative Medicine, University College London, Royal Free London NHS Foundation Trust, London, UK
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25
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Dorati R, Genta I, Colzani B, Modena T, Bruni G, Tripodo G, Conti B. Stability Evaluation of Ivermectin-Loaded Biodegradable Microspheres. AAPS PharmSciTech 2015; 16:1129-39. [PMID: 25700978 DOI: 10.1208/s12249-015-0305-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/29/2015] [Indexed: 11/30/2022] Open
Abstract
A stability study was performed on ivermectin (IVM)-loaded biodegradable microparticles intended for injection in dogs. The rational was to evaluate the performances upon irradiation of a drug, such as IVM, with a few criticalities with respect to its stability, and toxicity. The goal was to provide valuable information for pharmaceutical scientists and manufacturers working in the veterinary area. The microspheres based on poly(D,L-lactide) and poly-(ε-caprolactone) and loaded with IVM and with the addition of alpha-tocopherol (TCP) as antioxidant were prepared by the emulsion solvent evaporation method and sterilized by gamma irradiation. Microsphere characterization in term of size, shape, polymer, and IVM stability upon irradiation was performed. The results show that the type of polymer significantly affects microsphere characteristics and performances. Moreover, suitably stable formulations can be achieved only by TCP addition.
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26
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Caffeic Acid-PLGA Conjugate to Design Protein Drug Delivery Systems Stable to Irradiation. J Funct Biomater 2015; 6:1-13. [PMID: 25569163 PMCID: PMC4384096 DOI: 10.3390/jfb6010001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Accepted: 12/24/2014] [Indexed: 11/23/2022] Open
Abstract
This work reports the feasibility of caffeic acid grafted PLGA (g-CA-PLGA) to design biodegradable sterile microspheres for the delivery of proteins. Ovalbumin (OVA) was selected as model compound because of its sensitiveness of γ-radiation. The adopted grafting procedure allowed us to obtain a material with good free radical scavenging properties, without a significant modification of Mw and Tg of the starting PLGA (Mw PLGA = 26.3 ± 1.3 kDa vs.Mw g-CA-PLGA = 22.8 ± 0.7 kDa; Tg PLGA = 47.7 ± 0.8 °C vs.Tg g-CA-PLGA = 47.4 ± 0.2 °C). By using a W1/O/W2 technique, g-CA-PLGA improved the encapsulation efficiency (EE), suggesting that the presence of caffeic residues improved the compatibility between components (EEPLGA = 35.0% ± 0.7% vs.EEg-CA-PLGA = 95.6% ± 2.7%). Microspheres particle size distribution ranged from 15 to 50 µm. The zeta-potential values of placebo and loaded microspheres were −25 mV and −15 mV, respectively. The irradiation of g-CA-PLGA at the dose of 25 kGy caused a less than 1% variation of Mw and the degradation patterns of the non-irradiated and irradiated microspheres were superimposable. The OVA content in g-CA-PLGA microspheres decreased to a lower extent with respect to PLGA microspheres. These results suggest that g-CA-PLGA is a promising biodegradable material to microencapsulate biological drugs.
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Effect of gamma irradiation on structural and biological properties of a PLGA-PEG-hydroxyapatite composite. ScientificWorldJournal 2014; 2014:420616. [PMID: 25574485 PMCID: PMC4275603 DOI: 10.1155/2014/420616] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 07/31/2014] [Indexed: 11/17/2022] Open
Abstract
Gamma irradiation is able to affect various structural and biological properties of biomaterials In this study, a composite of Hap/PLGA-PEG and their ingredients were submitted to gamma irradiation doses of 25 and 50 KGy. Various properties such as molecular weight (GPC), thermal behavior (DSC), wettability (contact angle), cell viability (MTT assay), and alkaline phosphatase activity were studied for the composites and each of their ingredients. The results showed a decrease in molecular weight of copolymer with no change in the glass transition and melting temperatures after gamma irradiation. In general gamma irradiation can increase the activation energy ΔH of the composites and their ingredients. While gamma irradiation had no effect on the wettability of copolymer samples, there was a significant decrease in contact angle of hydroxyapatite and composites with increase in gamma irradiation dose. This study showed an increase in biocompatibility of hydroxyapatite with gamma irradiation with no significant effect on cell viability in copolymer and composite samples. In spite of the fact that no change occurred in alkaline phosphatase activity of composite samples, results indicated a decrease in alkaline phosphatase activity in irradiated hydroxyapatites. These effects on the properties of PLGA-PEG-hydroxyapatite can enhance the composite application as a biomaterial.
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The potential of using biodegradable microspheres in retinal diseases and other intraocular pathologies. Prog Retin Eye Res 2014; 42:27-43. [DOI: 10.1016/j.preteyeres.2014.04.002] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Revised: 04/29/2014] [Accepted: 04/30/2014] [Indexed: 11/19/2022]
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29
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Dorati R, Genta I, Colzani B, Tripodo G, Conti B. Preliminary investigation on the design of biodegradable microparticles for ivermectin delivery: set up of formulation parameters. Drug Dev Ind Pharm 2014; 41:1182-92. [PMID: 24994001 DOI: 10.3109/03639045.2014.935395] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The aim was to design sterile biodegradable microparticulate drug delivery systems based on poly(dl-lactide) (PLA) and poly(ε-caprolactone) (PCL) and containing ivermectin (IVM), an antiparasitic drug, for subcutaneous administration in dogs. The drug delivery system should: (i) ensure a full 12-month protection upon single dose administration; (ii) be safe with particular attention regarding IVM dosage and its release, in order to prevent over dosage side effects. This preliminary work involves: polymer selection, evaluation of the effects of γ-irradiation on the polymers and IVM, investigation and set up of suitable microparticle preparation process and parameters, IVM-loaded microparticles in vitro release evaluation. Results of gel permeation chromatography analysis on the irradiated polymers and IVM mixtures showed that combination of IVM with the antioxidant α-tocopherol (TCP) reduces the damage extent induced by irradiation treatment, independently on the polymer type. Solvent evaporation process was successfully used for the preparation of PLA microparticles and appropriately modified; it was recognized as suitable for the preparation of PCL microparticles. Good process yields were achieved ranging from 76.08% to 94.72%; encapsulation efficiency was between 85.76% and 91.25%, independently from the polymer used. The type of polymer and the consequent preparation process parameters affected microparticle size that was bigger for PCL microparticles (480-800 µm) and solvent residual that was >500 ppm for PLA microparticles. In vitro release test showed significantly faster IVM release rates from PCL microparticles, with respect to PLA microparticles, suggesting that a combination of the polymers could be used to obtain the suitable drug release rate.
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Affiliation(s)
- Rosella Dorati
- Department of Drug Sciences, University of Pavia , Pavia , Italy
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Sgarioto M, Adhikari R, Gunatillake PA, Moore T, Malherbe F, Nagel MD, Patterson J. Properties andin vitroevaluation of high modulus biodegradable polyurethanes for applications in cardiovascular stents. J Biomed Mater Res B Appl Biomater 2014; 102:1711-9. [DOI: 10.1002/jbm.b.33137] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 01/16/2014] [Accepted: 02/25/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Melissa Sgarioto
- Swinburne University of Technology; Faculty of Life and Social Sciences; Hawthorn, Victoria 3122 Australia
- Université de Technologie de Compiègne, UMR CNRS 7338 Biomécanique et Bioingénierie, Centre de Recherches de Royallieu; Compiègne Cedex France
| | - Raju Adhikari
- CSIRO Materials Science and Engineering, Clayton South MDC; Victoria 3169 Australia
| | | | - Tim Moore
- PolyNovo Biomaterials Pty Ltd, Port Melbourne; Victoria 3207 Australia
| | - François Malherbe
- Swinburne University of Technology; Faculty of Life and Social Sciences; Hawthorn, Victoria 3122 Australia
| | - Marie-Danielle Nagel
- Université de Technologie de Compiègne, UMR CNRS 7338 Biomécanique et Bioingénierie, Centre de Recherches de Royallieu; Compiègne Cedex France
| | - John Patterson
- Swinburne University of Technology; Faculty of Life and Social Sciences; Hawthorn, Victoria 3122 Australia
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Yıldırım Y, Oral A. The influence of γ-ray irradiation on the thermal stability and molecular weight of Poly(l-Lactic acid) and its nanocomposites. Radiat Phys Chem Oxf Engl 1993 2014. [DOI: 10.1016/j.radphyschem.2013.08.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Solvent induced phase inversion-based in situ forming controlled release drug delivery implants. J Control Release 2014; 176:8-23. [DOI: 10.1016/j.jconrel.2013.12.020] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Revised: 12/17/2013] [Accepted: 12/19/2013] [Indexed: 01/04/2023]
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33
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Lendlein A, Behl M, Hiebl B, Wischke C. Shape-memory polymers as a technology platform for biomedical applications. Expert Rev Med Devices 2014; 7:357-79. [DOI: 10.1586/erd.10.8] [Citation(s) in RCA: 317] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Rashidi H, Yang J, Shakesheff KM. Surface engineering of synthetic polymer materials for tissue engineering and regenerative medicine applications. Biomater Sci 2014; 2:1318-1331. [DOI: 10.1039/c3bm60330j] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
When using polymer materials as scaffolds for tissue engineering or regenerative medicine applications the initial, and often lasting, interaction between cells and the material areviasurfaces.
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Affiliation(s)
- Hassan Rashidi
- Wolfson Centre for Stem Cells
- Tissue Engineering and Modelling
- Division of Drug Delivery and Tissue Engineering
- School of Pharmacy
- University of Nottingham
| | - Jing Yang
- Wolfson Centre for Stem Cells
- Tissue Engineering and Modelling
- Division of Drug Delivery and Tissue Engineering
- School of Pharmacy
- University of Nottingham
| | - Kevin M. Shakesheff
- Wolfson Centre for Stem Cells
- Tissue Engineering and Modelling
- Division of Drug Delivery and Tissue Engineering
- School of Pharmacy
- University of Nottingham
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35
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Dubey R. Controlled-release injectable microemulsions: recent advances and potential opportunities. Expert Opin Drug Deliv 2013; 11:159-73. [DOI: 10.1517/17425247.2014.870151] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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36
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Wacker M. Nanocarriers for intravenous injection--the long hard road to the market. Int J Pharm 2013; 457:50-62. [PMID: 24036012 DOI: 10.1016/j.ijpharm.2013.08.079] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 08/27/2013] [Accepted: 08/28/2013] [Indexed: 12/19/2022]
Abstract
Nanodispersed drug delivery systems for the intravenous injection have successfully overcome the hurdle of drug approval in the European Union and the United States. Although there is a need for highly advanced nanocarrier devices they have not been the result of a rational formulation design but were developed as stand-alone products in a long chain of case-by-case studies. This review focuses on aspects in development, composition, and manufacture of these innovative dosage forms that are relevant for the translation into new drug products.
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Affiliation(s)
- Matthias Wacker
- Institute of Pharmaceutical Technology, Goethe University, Max-von-Laue-Str. 9, D-60438 Frankfurt am Main, Germany.
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37
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Biodegradable cross-linked poly(trimethylene carbonate) networks for implant applications: Synthesis and properties. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.03.059] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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38
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Sefat F, McKean R, Deshpande P, Ramachandran C, Hill CJ, Sangwan VS, Ryan AJ, MacNeil S. Production, Sterilisation and Storage of Biodegradable Electrospun PLGA Membranes for Delivery of Limbal Stem Cells to the Cornea. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.proeng.2013.05.099] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Hu L, Zhang H, Song W. An overview of preparation and evaluation sustained-release injectable microspheres. J Microencapsul 2012; 30:369-82. [DOI: 10.3109/02652048.2012.742158] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Checa-Casalengua P, Jiang C, Bravo-Osuna I, Tucker BA, Molina-Martínez IT, Young MJ, Herrero-Vanrell R. Preservation of biological activity of glial cell line-derived neurotrophic factor (GDNF) after microencapsulation and sterilization by gamma irradiation. Int J Pharm 2012; 436:545-54. [PMID: 22828071 DOI: 10.1016/j.ijpharm.2012.07.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Revised: 07/10/2012] [Accepted: 07/12/2012] [Indexed: 11/25/2022]
Abstract
A main issue in controlled delivery of biotechnological products from injectable biodegradable microspheres is to preserve their integrity and functional activity after the microencapsulation process and final sterilization. The present experimental work tested different technological approaches to maintain the biological activity of an encapsulated biotechnological product within PLGA [poly (lactic-co-glycolic acid)] microspheres (MS) after their sterilization by gamma irradiation. GDNF (glial cell line-derived neurotrophic factor), useful in the treatment of several neurodegenerative diseases, was chosen as a labile model protein. In the particular case of optic nerve degeneration, GDNF has been demonstrated to improve the damaged retinal ganglion cells (RGC) survival. GDNF was encapsulated in its molecular state by the water-in-oil-in-water (W/O/W) technique or as solid according to the solid-in-oil-in-water (S/O/W) method. Based on the S/O/W technique, GDNF was included in the PLGA microspheres alone (S/O/W 1) or in combination with an antioxidant (vitamin E, Vit E) (S/O/W 2). Microspheres were sterilized by gamma-irradiation (dose of 25 kGy) at room and low (-78 °C) temperatures. Functional activity of GDNF released from the different microspheres was evaluated both before and after sterilization in their potential target cells (retinal cells). Although none of the systems proposed achieved with the goal of totally retain the structural stability of the GDNF-dimer, the protein released from the S/O/W 2 microspheres was clearly the most biologically active, showing significantly less retinal cell death than that released from either W/O/W or S/O/W 1 particles, even in low amounts of the neurotrophic factor. According to the results presented in this work, the biological activity of biotechnological products after microencapsulation and sterilization can be further preserved by the inclusion of the active molecule in its solid state in combination with antioxidants and using low temperature (-78 °C) during gamma irradiation exposure.
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Affiliation(s)
- P Checa-Casalengua
- Dep. of Pharmacy and Pharmaceutical Technology, School of Pharmacy, Avd. Complutense s/n, Complutense University, Madrid 28040, Spain
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Vega E, Egea MA, Calpena AC, Espina M, García ML. Role of hydroxypropyl-β-cyclodextrin on freeze-dried and gamma-irradiated PLGA and PLGA-PEG diblock copolymer nanospheres for ophthalmic flurbiprofen delivery. Int J Nanomedicine 2012; 7:1357-71. [PMID: 22457594 PMCID: PMC3310410 DOI: 10.2147/ijn.s28481] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Poly(D,L-lactide-co-glycolide) and poly(D,L-lactide-co-glycolide) with poly(ethylene glycol) nanospheres (NSs) incorporating flurbiprofen (FB) were freeze-dried with several cryoprotective agents and sterilized by γ-irradiation. Only when 5.0% (w/v) hydroxypropyl-β-cyclodextrin (HPβCD) was used, a complete resuspension by manual shaking and almost identical particle size of the NSs was obtained after freeze-drying. In vitro drug release and ex vivo corneal permeation of NSs with and without HPβCD were evaluated. The presence of HPβCD resulted in a reduction of burst effect, providing a more sustained release of the drug. A significant decrease in the FB transcorneal permeation of NSs containing HPβCD was obtained, related to the slower diffusion of FB observed in the in vitro results. The uptake mechanism of the NSs was examined by confocal microscopy, suggesting that NSs penetrate corneal epithelium through a transcellular pathway. Ocular tolerance was assessed in vitro and in vivo by the Eytex™ and Draize test, respectively. Long-term stability studies revealed that γ-irradiated NSs stored as freeze-dried powders maintained their initial characteristics. Stability studies of the resuspended NSs after 3 months of storage in the aqueous form showed that NSs were stable at 4°C, while formulations stored at 25°C and 40°C increased their initial particle size.
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Affiliation(s)
- Estefanía Vega
- Department of Physical Chemistry, Institute of Nanoscience and Nanotechnology, Faculty of Pharmacy, University of Barcelona, Av Joan XXIII s/n, Barcelona, Spain.
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Choonara YE, Pillay V, Danckwerts MP, Carmichael TR, du Toit LC, Khan RA. Micromechanical and physical stability analysis of an irradiated poly (lactic-co-glycolic acid) donut-shaped minitablet device for intraocular implantation. Pharm Dev Technol 2012; 18:1186-203. [PMID: 22335771 DOI: 10.3109/10837450.2011.619541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study pragmatically characterized the micromechanical and physical stability of a poly(lactic-co-glycolic acid) (PLGA)-based ganciclovir (GCV)-loaded donut-shaped minitablet (DSMT) device for intraocular implantation. Thermal and spectroscopic analysis was performed on various drug-polymer permutations. Porositometric profiles were quantitatively analyzed coupled with qualitatively SEM imaging. The tensile strength (TS) and fracture energy (FE) of the device was also determined pre- and post-γ-sterilization. Inimitably, chemometric and molecular modeling provided a supportive confirmatory tool for establishing fundamental correlative suppositions between the transitioned surface morphology and the micromechanical stability after γ-irradiation. Isotherm plot volumes ranged between -0.028 ± 0.022 and 0.110 ± 0.005 m(2)/g for pre- and post-sterilized devices, respectively, revealing a microporous alteration in porosity. Pre-sterilized devices had larger pores (BJHa=286.22 vs. 192.49 Å) and lower FE (151.301 ± 6.089 N/m) and TS (26.396 ± 1.062 N) values while sterilized devices had crystalline matrices that facilitated the superiorly controlled drug release kinetcs obtained. DSC thermograms displayed the characteristic disordered crystallization of GCV and hydration exotherms resulting from ionization during γ-irradiation. FTIR spectrograms showed fingerprint molecular imprints of GCV and axial stretching of hybridized carbons of PLGA with no subversive drug-polymer interactions after γ-irradiation. Integration of the results inveterately revealed that compression and subsequent γ-irradiation of the device affected desirable micromechanical and solid-state stability behavior.
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Affiliation(s)
- Yahya E Choonara
- University of the Witwatersrand, Faculty of Health Sciences, Department of Pharmacy and Pharmacology , 7 York Road, Parktown, 2193, Johannesburg, South Africa
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Cilurzo F, Puoci F, Selmin F, Iemma F, Minghetti P. Pyrogallic acid-PLGA conjugate as new biodegradable material suitable for final sterilization by irradiation. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.1746] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Mohanan D, Gander B, Kündig TM, Johansen P. Encapsulation of antigen in poly(D,L-lactide-co-glycolide) microspheres protects from harmful effects of γ-irradiation as assessed in mice. Eur J Pharm Biopharm 2011; 80:274-81. [PMID: 22024408 DOI: 10.1016/j.ejpb.2011.10.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 10/06/2011] [Accepted: 10/10/2011] [Indexed: 01/16/2023]
Abstract
During the last two decades, synthetic polymers such as poly(lactide-co-glycolide) (PLGA) have been investigated for the development of nano- or microparticles as adjuvants or antigen vehicles. To enable transfer of this technology to human settings, the issue of sterilisation is of central importance. Since most polymers are heat-sensitive, sterilisation of polymeric microspheres for parenteral administration is assured either by costly and laborious aseptical preparation or the more preferred γ-irradiation. Many studies have investigated the effect of γ-irradiation on various physiochemical properties of the microspheres, but investigations on immunological effects are rare. We prepared poly(lactide-co-glycolide) (PLGA) microspheres containing ovalbumin (OVA) and tested the effect of γ-irradiation on the various immunological properties in mice. For reference, OVA was γ-irradiated and tested equivalently. The ability of encapsulated or non-encapsulated OVA to trigger activation of dendritic cells (DCs) was not affected by irradiation. However, while γ-irradiation of free OVA strongly influenced the antigen presentation, encapsulated OVA was not affected by irradiation. γ-Irradiation of OVA also reduced the immunogenicity in mice with regard to OVA-specific IgG1 production. In contrast, the antibody and the T-cell responses in mice immunised with PLGA-encapsulated OVA were similar irrespective of the γ-irradiation status. Hence, encapsulation of antigen into PLGA microspheres protects antigen from the potential detrimental effect of γ-irradiation leading to inactivation or altered immunogenicity. Sterilisation by γ-irradiation therefore enables a cost-effective production of PLGA-based antigen-delivery systems as compared to the more laborious and expensive aseptical production of such vaccines.
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Affiliation(s)
- Deepa Mohanan
- Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland
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Bat E, van Kooten TG, Feijen J, Grijpma DW. Crosslinking of Trimethylene Carbonate and D
, L
-Lactide (Co-) Polymers by Gamma Irradiation in the Presence of Pentaerythritol Triacrylate. Macromol Biosci 2011; 11:952-61. [DOI: 10.1002/mabi.201100031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2011] [Indexed: 11/08/2022]
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Selim M, Bullock AJ, Blackwood KA, Chapple CR, MacNeil S. Developing biodegradable scaffolds for tissue engineering of the urethra. BJU Int 2011; 107:296-302. [PMID: 20477828 DOI: 10.1111/j.1464-410x.2010.09310.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE To develop a synthetic biodegradable alternative to using human allodermis for the production of tissue-engineered buccal mucosa for substitution urethroplasty, looking specifically at issues of sterilization and cell-seeding protocols and, comparing the results to native buccal mucosa. MATERIAL AND METHODS Three methods of sterilization, peracetic acid (PAA), γ-irradiation and ethanol, were evaluated for their effects on a biodegradable electrospun scaffold of polylactide-co-glycolide (PLGA, 85:15), to identify a sterilization method with minimal adverse effects on the scaffolds. Two protocols for seeding oral cells on the scaffold were compared, co-culture of fibroblasts and keratinocytes on the scaffolds for 14 days, and seeding fibroblasts for 5 days then adding keratinocytes for a further 10 days. Cell viability and proliferation on the scaffolds, scaffold contraction and mechanical properties of the scaffolds with and without cells were examined. RESULTS γ-irradiation and PAA sterilized scaffolds remained sterile for >3 months when incubated in antibiotic-free culture medium, while ethanol sterilized and unsterilized samples became infected within 2-14 days. All scaffolds showed extensive contraction (up to 50% over 14 days) irrespective of the method of sterilization or the presence of cells. All methods of sterilization, particularly ethanol, reduced the tensile strength of the scaffolds. The addition of cells tended to further reduce mechanical properties but increased elasticity. The cell-seeding protocol of adding fibroblasts for 5 days followed by keratinocytes for 10 days was the most promising, achieving a mean (sem) ultimate tensile stress of 1.20 (0.24) × 10⁵ N/m² compared to 3.77 (1.05) × 10⁵ N/m² for native buccal mucosa, and a Young's modulus of 2.40 (0.25) MPa, compared to 0.73 (0.09) MPa for the native buccal mucosa. CONCLUSION This study adds to our understanding of how sterilization and cell seeding affect the physical properties of scaffolds. Both PAA and γ-irradiation appear to be suitable methods for sterilizing PLGA scaffolds, although both reduce the tensile properties of the scaffolds. Cells grow well on the sterilized scaffolds, and with our current protocol produce constructs which have ≈ 30% of the mechanical strength and elasticity of the native buccal mucosa. We conclude that sterilized PLGA 85:15 is a promising material for producing tissue-engineered buccal mucosa.
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Affiliation(s)
- Mohamed Selim
- Department of Urology, Menoufia Teaching Hospital, Menoufia, Egypt
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Abstract
Current strategies of regenerative medicine are focused on the restoration of pathologically altered tissue architectures by transplantation of cells in combination with supportive scaffolds and biomolecules. In recent years, considerable interest has been given to biologically active scaffolds which are based on similar analogs of the extracellular matrix that have induced synthesis of tissues and organs. To restore function or regenerate tissue, a scaffold is necessary that will act as a temporary matrix for cell proliferation and extracellular matrix deposition, with subsequent ingrowth until the tissues are totally restored or regenerated. Scaffolds have been used for tissue engineering such as bone, cartilage, ligament, skin, vascular tissues, neural tissues, and skeletal muscle and as vehicle for the controlled delivery of drugs, proteins, and DNA. Various technologies come together to construct porous scaffolds to regenerate the tissues/organs and also for controlled and targeted release of bioactive agents in tissue engineering applications. In this paper, an overview of the different types of scaffolds with their material properties is discussed. The fabrication technologies for tissue engineering scaffolds, including the basic and conventional techniques to the more recent ones, are tabulated.
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Bat E, Feijen J, Grijpma DW. Biodegradable Elastomeric Networks: Highly Efficient Cross-Linking of Poly(trimethylene carbonate) by Gamma Irradiation in the Presence of Pentaerythritol Triacrylate. Biomacromolecules 2010; 11:2692-9. [DOI: 10.1021/bm1007234] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erhan Bat
- MIRA Institute for Biomedical Technology and Technical Medicine and Department of Polymer Chemistry and Biomaterials, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands and Department of Biomedical Engineering, University Medical Centre Groningen, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Jan Feijen
- MIRA Institute for Biomedical Technology and Technical Medicine and Department of Polymer Chemistry and Biomaterials, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands and Department of Biomedical Engineering, University Medical Centre Groningen, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
| | - Dirk W. Grijpma
- MIRA Institute for Biomedical Technology and Technical Medicine and Department of Polymer Chemistry and Biomaterials, Faculty of Science and Technology, University of Twente, P.O. Box 217, 7500 AE, Enschede, The Netherlands and Department of Biomedical Engineering, University Medical Centre Groningen, University of Groningen, A. Deusinglaan 1, 9713 AV, Groningen, The Netherlands
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Felder CB, Blanco-Príeto MJ, Heizmann J, Merkle HP, Gander B. Ultrasonic atomization and subsequent polymer desolvation for peptide and protein microencapsulation into biodegradable polyesters. J Microencapsul 2010. [DOI: 10.3109/02652040309178346] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ch. B. Felder
- Institute of Pharmaceutical Sciences, ETH Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- European Patent Office, 80298, Munich, Germany
| | - M. J. Blanco-Príeto
- Institute of Pharmaceutical Sciences, ETH Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- Centro Galénico, Farmacia y Tecnología Farmacéutica, Universidad de Navarra, 31080, Pamplona, Spain
| | - J. Heizmann
- Institute of Pharmaceutical Sciences, ETH Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
- F. Hoffmann-La Roche AG, 4070, Basel, Switzerland
| | - H. P. Merkle
- Institute of Pharmaceutical Sciences, ETH Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
| | - B. Gander
- Institute of Pharmaceutical Sciences, ETH Zurich, Winterthurerstrasse 190, 8057, Zurich, Switzerland
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Physical effects of radiation processes in poly(aliphatic/aromatic-ester)s modified with e-beam radiation. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.01.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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