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Gharbi A, Oudadesse H, El Feki H, Cheikhrouhou-Koubaa W, Chatzistavrou X, V Rau J, Heinämäki J, Antoniac I, Ashammakhi N, Derbel N. High Boron Content Enhances Bioactive Glass Biodegradation. J Funct Biomater 2023; 14:364. [PMID: 37504859 PMCID: PMC10381889 DOI: 10.3390/jfb14070364] [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: 05/26/2023] [Revised: 06/16/2023] [Accepted: 06/19/2023] [Indexed: 07/29/2023] Open
Abstract
Derived Hench bioactive glass (BaG) containing boron (B) is explored in this work as it plays an important role in bone development and regeneration. B was also found to enhance BaG dissociation. However, it is only possible to incorporate a limited amount of B. To increase the amount of B in BaG, bioactive borosilicate glasses (BaG-Bx) were fabricated based on the use of the solution-gelation process (sol-gel). In this work, a high B content (20 wt.%) in BaG, respecting the conditions of bioactivity and biodegradability required by Hench, was achieved for the first time. The capability of BaG-Bx to form an apatite phase was assessed in vitro by immersion in simulated body fluid (SBF). Then, the chemical structure and the morphological changes in the fabricated BaG-Bx (x = 0, 5, 10 and 20) were studied. The formation of hydroxyapatite (HAp) layer was observed with X-ray diffraction (XRD) and infrared (IR) spectroscopy. The presence of HAp layer was confirmed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Enhanced bioactivity and chemical stability of BaG-Bx were evaluated with an ion exchange study based on Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) and energy dispersive spectroscopy (EDS). Results indicate that by increasing the concentration of B in BaG-Bx, the crystallization rate and the quality of the newly formed HAp layer on BaG-Bx surfaces can be improved. The presence of B also leads to enhanced degradation of BaGs in SBF. Accordingly, BAG-Bx can be used for bone regeneration, especially in children, because of its faster degradation as compared to B-free glass.
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Affiliation(s)
- Amina Gharbi
- CEM Lab, National Engineering School of Sfax, Sfax University, Sfax 3018, Tunisia
- LT2S Lab, Digital Research Centre of Sfax, Technopole of Sfax, P.O. Box 275, Sfax 3000, Tunisia
| | | | - Hafedh El Feki
- Faculty of Sciences of Sfax, Sfax University, Sfax 3018, Tunisia
| | | | - Xanthippi Chatzistavrou
- Department of Chemical Engineering and Material Science, College of Engineering, Michigan State University, East Lansing, MI 48824, USA
| | - Julietta V Rau
- Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche (ISM-CNR), Via del Fosso del Cavaliere 100, 00133 Rome, Italy
- Department of Analytical, Physical and Colloid Chemistry, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Trubetskaya 8, 119991 Moscow, Russia
| | - Jyrki Heinämäki
- Institute of Pharmacy, Faculty of Medicine, University of Tartu, Nooruse 1, 50411 Tartu, Estonia
| | - Iulian Antoniac
- Faculty of Material Science and Engineering, University Politehnica of Bucharest, SIM 313, 060042 Bucharest, Romania
| | - Nureddin Ashammakhi
- Institute for Quantitative Health Science and Engineering, Department of Biomedical Engineering, College of Engineering and College of Human Medicine, Michigan State University, East Lansing, MI 48824, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Nabil Derbel
- CEM Lab, National Engineering School of Sfax, Sfax University, Sfax 3018, Tunisia
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Zeng Y, Li X, Liu X, Yang Y, Zhou Z, Fan J, Jiang H. PLLA Porous Microsphere-Reinforced Silk-Based Scaffolds for Auricular Cartilage Regeneration. ACS OMEGA 2021; 6:3372-3383. [PMID: 33553955 PMCID: PMC7860514 DOI: 10.1021/acsomega.0c05890] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 01/13/2021] [Indexed: 05/17/2023]
Abstract
Microtia, frequently encountered in plastic surgery practice, is usually corrected by auricular reconstruction with prostheses or autologous cartilages. In recent decades, however, cartilage tissue engineering has been emerging as a promising alternative for its minimal invasion and low immunogenicity. As a critical factor for tissue engineering, scaffolds are expected to be sufficiently porous and stiff to facilitate chondrogenesis. In this work, we introduce novel poly-l-lactic acid (PLLA) porous microsphere-reinforced silk-based hybrid (SBH) scaffolds with a multihierarchical porous structure. The scaffolds are fabricated by embedding PLLA porous microspheres (PMs) into a blending matrix of silk fibroin (SF) and gelatin solution, followed by mixing with a degummed silk fiber mesh and freeze-drying process. Through adjusting the amount of PLLA PMs, the mechanical strength approximates to natural cartilage and also balanced physical properties were realized. Biological evaluations of SBH scaffolds, both in vitro and in vivo, were conducted and PM-free plain silk-based (PSB) scaffolds were applied as control. Overall, it suggests that the incorporation of PLLA PMs remarkably improves mechanical properties and the capability to promote chondrogenesis of SBH scaffolds, and that SBH scaffolds appear to be a promising construct for potential applications in auricular cartilage tissue engineering and relevant fields.
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Affiliation(s)
- Yan Zeng
- Plastic
Surgery Hospital and Institute, Chinese
Academy of Medical Sciences & Peking Union Medical College, Beijing 100144, China
| | - Xiaokai Li
- Biomedical
Barriers Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union
Medical College, Tianjin 300192, China
- Tianjin
Key Laboratory of Biomedical Materials, Tianjin 300192, China
| | - Xia Liu
- Plastic
Surgery Hospital and Institute, Chinese
Academy of Medical Sciences & Peking Union Medical College, Beijing 100144, China
| | - Yuzhou Yang
- Biomedical
Barriers Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union
Medical College, Tianjin 300192, China
- Tianjin
Key Laboratory of Biomedical Materials, Tianjin 300192, China
| | - Zhimin Zhou
- Biomedical
Barriers Research Center, Institute of Biomedical Engineering, Chinese Academy of Medical Sciences & Peking Union
Medical College, Tianjin 300192, China
- Tianjin
Key Laboratory of Biomedical Materials, Tianjin 300192, China
| | - Jincai Fan
- Plastic
Surgery Hospital and Institute, Chinese
Academy of Medical Sciences & Peking Union Medical College, Beijing 100144, China
| | - Haiyue Jiang
- Plastic
Surgery Hospital and Institute, Chinese
Academy of Medical Sciences & Peking Union Medical College, Beijing 100144, China
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3
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Moradi E, Mehrani Z, Ebrahimzadeh H. Gelatin/sodium triphosphate hydrogel electrospun nanofiber mat as a novel nanosorbent for microextraction in packed syringe of La3+ and Tb3+ ions prior to their determination by ICP-OES. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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4
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Human‐lymphocyte cell friendly starch–hydroxyapatite biodegradable composites: Hydrophilic mechanism, mechanical, and structural impact. J Appl Polym Sci 2019. [DOI: 10.1002/app.48913] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Mastalska-Popławska J, Sikora M, Izak P, Góral Z. Applications of starch and its derivatives in bioceramics. J Biomater Appl 2019; 34:12-24. [DOI: 10.1177/0885328219844972] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Marek Sikora
- Faculty of Food Technology, University of Agriculture, Krakow, Poland
| | - Piotr Izak
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Kraków, Poland
| | - Zuzanna Góral
- Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Kraków, Poland
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6
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Souza MT, Rennó ACM, Peitl O, Zanotto ED. New highly bioactive crystallization-resistant glass for tissue engineering applications. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/2053-1613/aa53b5] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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7
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Therapeutic-designed electrospun bone scaffolds: mesoporous bioactive nanocarriers in hollow fiber composites to sequentially deliver dual growth factors. Acta Biomater 2015; 16:103-16. [PMID: 25617805 DOI: 10.1016/j.actbio.2014.12.028] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/28/2014] [Accepted: 12/30/2014] [Indexed: 11/21/2022]
Abstract
A novel therapeutic design of nanofibrous scaffolds, holding a capacity to load and deliver dual growth factors, that targets bone regeneration is proposed. Mesoporous bioactive glass nanospheres (MBNs) were used as bioactive nanocarriers for long-term delivery of the osteogenic enhancer fibroblast growth factor 18 (FGF18). Furthermore, a core-shell structure of a biopolymer fiber made of polyethylene oxide/polycaprolactone was introduced to load FGF2, another type of cell proliferative and angiogenic growth factor, safely within the core while releasing it more rapidly than FGF18. The prepared MBNs showed enlarged mesopores of about 7 nm, with a large surface area and pore volume. The protein-loading capacity of MBNs was as high as 13% when tested using cytochrome C, a model protein. The protein-loaded MBNs were smoothly incorporated within the core of the fiber by electrospinning, while preserving a fibrous morphology. The incorporation of MBNs significantly increased the apatite-forming ability and mechanical properties of the core-shell fibers. The possibility of sequential delivery of two experimental growth factors, FGF2 and FGF18, incorporated either within the core-shell fiber (FGF2) or within MBNs (FGF18), was demonstrated by the use of cytochrome C. In vitro studies using rat mesenchymal stem cells demonstrated the effects of the FGF2-FGF18 loadings: significant stimulation of cell proliferation as well as the induction of alkaline phosphate activity and cellular mineralization. An in vivo study performed on rat calvarium defects for 6 weeks demonstrated that FGF2-FGF18-loaded fiber scaffolds had significantly higher bone-forming ability, in terms of bone volume and density. The current design utilizing novel MBN nanocarriers with a core-shell structure aims to release two types of growth factors, FGF2 and FGF18, in a sequential manner, and is considered to provide a promising therapeutic scaffold platform that is effective for bone regeneration.
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Hardy JG, Cornelison RC, Sukhavasi RC, Saballos RJ, Vu P, Kaplan DL, Schmidt CE. Electroactive Tissue Scaffolds with Aligned Pores as Instructive Platforms for Biomimetic Tissue Engineering. Bioengineering (Basel) 2015; 2:15-34. [PMID: 28955011 PMCID: PMC5597125 DOI: 10.3390/bioengineering2010015] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Accepted: 01/12/2015] [Indexed: 01/13/2023] Open
Abstract
Tissues in the body are hierarchically structured composite materials with tissue-specific chemical and topographical properties. Here we report the preparation of tissue scaffolds with macroscopic pores generated via the dissolution of a sacrificial supramolecular polymer-based crystal template (urea) from a biodegradable polymer-based scaffold (polycaprolactone, PCL). Furthermore, we report a method of aligning the supramolecular polymer-based crystals within the PCL, and that the dissolution of the sacrificial urea yields scaffolds with macroscopic pores that are aligned over long, clinically-relevant distances (i.e., centimeter scale). The pores act as topographical cues to which rat Schwann cells respond by aligning with the long axis of the pores. Generation of an interpenetrating network of polypyrrole (PPy) and poly(styrene sulfonate) (PSS) in the scaffolds yields electroactive tissue scaffolds that allow the electrical stimulation of Schwann cells cultured on the scaffolds which increases the production of nerve growth factor (NGF).
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Affiliation(s)
- John G Hardy
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
- Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Biomedical Sciences Building JG-53, P.O. Box 116131, Gainesville, FL 32611, USA.
| | - R Chase Cornelison
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
- Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Biomedical Sciences Building JG-53, P.O. Box 116131, Gainesville, FL 32611, USA.
| | - Rushi C Sukhavasi
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
| | - Richard J Saballos
- Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Biomedical Sciences Building JG-53, P.O. Box 116131, Gainesville, FL 32611, USA.
| | - Philip Vu
- Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Biomedical Sciences Building JG-53, P.O. Box 116131, Gainesville, FL 32611, USA.
| | - David L Kaplan
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155, USA.
| | - Christine E Schmidt
- Department of Biomedical Engineering, The University of Texas at Austin, Austin, TX 78712, USA.
- Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Biomedical Sciences Building JG-53, P.O. Box 116131, Gainesville, FL 32611, USA.
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Ali Akbari Ghavimi S, Ebrahimzadeh MH, Solati-Hashjin M, Abu Osman NA. Polycaprolactone/starch composite: Fabrication, structure, properties, and applications. J Biomed Mater Res A 2014; 103:2482-98. [DOI: 10.1002/jbm.a.35371] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/28/2014] [Accepted: 11/13/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Soheila Ali Akbari Ghavimi
- Department of Biomedical Engineering; Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
| | | | - Mehran Solati-Hashjin
- Department of Biomedical Engineering; Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
- Department of Biomedical Engineering; Amirkabir University of Technology; 15914 Tehran Iran
| | - Noor Azuan Abu Osman
- Department of Biomedical Engineering; Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
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10
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Liu X, Hasan MS, Grant DM, Harper LT, Parsons AJ, Palmer G, Rudd CD, Ahmed I. Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites. J Biomater Appl 2014; 29:675-87. [DOI: 10.1177/0885328214541302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A previous study utilising ‘single fibre’ fragmentation tests found that coating with magnesium improved the fibre and matrix interfacial shear strength. Therefore, the aim of this study was to investigate the effects of a magnesium coating on the manufacture and characterisation of a random chopped fibre reinforced polycaprolactone composite. Short chopped strand non-woven phosphate glass fibre mats were sputter coated with degradable magnesium to manufacture phosphate glass fibre/polycaprolactone composites. The degradation behaviour (water uptake, mass loss and pH change of the media) of these polycaprolactone composites as well as of pure polycaprolactone was investigated in phosphate buffered saline. The Mg coated fibre reinforced composites revealed less water uptake and mass loss during degradation compared to the non-coated composites. The cations released were also explored and a lower ion release profile for all three cations investigated (namely Na+, Mg2+ and Ca2+) was seen for the Mg coated composite samples. An increase of 17% in tensile strength and 47% in tensile modulus was obtained for the Mg coated composite samples. Both flexural and tensile properties were investigated and a higher retention of mechanical properties was obtained for the Mg coated fibre reinforced composite samples up to 10 days immersion in PBS. Cytocompatibility study showed both composite samples (coated and non-coated) had good cytocompatibility with human osteosarcoma cell line.
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Affiliation(s)
- Xiaoling Liu
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Muhammad S Hasan
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - David M Grant
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Lee T Harper
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Andrew J Parsons
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Graham Palmer
- Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, London, UK
| | - Chris D Rudd
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Ifty Ahmed
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
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11
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Hardy JG, Mouser DJ, Arroyo-Currás N, Geissler S, Chow JK, Nguy L, Kim JM, Schmidt CE. Biodegradable electroactive polymers for electrochemically-triggered drug delivery. J Mater Chem B 2014; 2:6809-6822. [DOI: 10.1039/c4tb00355a] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report biodegradable electroactive polymer (EAP)-based materials and their application as drug delivery devices.
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Affiliation(s)
- John G. Hardy
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
| | - David J. Mouser
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | | | - Sydney Geissler
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
| | - Jacqueline K. Chow
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Lindsey Nguy
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Jong M. Kim
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
| | - Christine E. Schmidt
- Department of Biomedical Engineering
- The University of Texas at Austin
- Austin, USA
- J. Crayton Pruitt Family Department of Biomedical Engineering
- University of Florida
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12
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Varila L, Lehtonen T, Tuominen J, Hupa M, Hupa L. In vitro behaviour of three biocompatible glasses in composite implants. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:2425-2435. [PMID: 22669284 DOI: 10.1007/s10856-012-4693-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Accepted: 05/22/2012] [Indexed: 06/01/2023]
Abstract
Poly(L,DL-lactide) composites containing filler particles of bioactive glasses 45S5 and S53P4 were compared with a composite containing a slowly dissolving glass S68. The in vitro reactivity of the composites was studied in simulated body fluid, Tris-buffered solution, and phosphate buffered saline. The high processing temperature induced thermal degradation giving cavities in the composites containing 45S5 and S53P4, while good adhesion of S68 to the polymer was observed. The cavities partly affected the in vitro reactivity of the composites. The degradation of the composites containing the bioactive glasses was faster in phosphate buffered saline than in the two other solutions. Hydroxyapatite precipitation suggesting bone tissue bonding capability was observed on these two composites in all three solutions. The slower dissolution of S68 glass particles and the limited hydroxyapatite precipitation suggested that this glass has potential as a reinforcing composition with the capability to guide bone tissue growth in biodegradable polymer composites.
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Affiliation(s)
- Leena Varila
- Process Chemistry Centre, Åbo Akademi University, 20500 Turku, Finland
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13
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Rada T, Santos TC, Marques AP, Correlo VM, Frias AM, Castro AG, Neves NM, Gomes ME, Reis RL. Osteogenic differentiation of two distinct subpopulations of human adipose-derived stem cells: an in vitro and in vivo study. J Tissue Eng Regen Med 2011; 6:1-11. [PMID: 21294275 DOI: 10.1002/term.388] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Accepted: 10/28/2010] [Indexed: 01/23/2023]
Abstract
The first stem cells considered for the reconstruction of bone were bone marrow mesenchymal stem cells (BMSCs). Subsequently, cells with similar marker expression panel and differentiation potential were found in new sources of cells, such as adipose tissue. This source of stem cells has a promising future in tissue-engineering applications, considering the abundance of this tissue in the human body, the easy harvesting and the high number of stem cells that are available from such a small amount of tissue. The isolation of the adipose stem cells is generally performed by means of enzymatic digestion of the tissues, followed by a natural selection of the stem cells based on their capacity to adhere to the culture flasks, leading to a quite heterogeneous population. This constitutes a major drawback for the use of these cells, since the heterogeneity of the cell culture obtained can compromise their proliferation and differentiation potential. In the present study we have analysed the in vitro and in vivo behaviour of two selected subpopulations with high osteogenic potential. For this purpose, ASCs(CD29+) and ASCs (STRO-1+)subpopulations were isolated and in vitro cultured onto a biodegradable polymeric scaffold, using osteogenic medium, before implantation in a nude mice model. The biodegradable polymeric scaffold used is a fibre-mesh structure based on a blend of starch and polycaprolatone (SPCL) that has been successfully used in several bone tissue-engineering studies. The implanted ASCs-scaffold constructs promoted the formation of new bone tissue in nude mice. However, the results obtained show differences in the behaviour of the two ASCs subpopulations under study, particularly regarding their potential to differentiate into the osteogenic lineage, and allowed the indentification of ASCs (STRO-1+) as the best subpopulation for bone tissue-engineering applications.
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Affiliation(s)
- T Rada
- 3Bs Research Group-Biomaterials, Biodegradables and Biomimetics, Department of Polymer Engineering, University of Minho, AvePark, Guimarães, Portugal
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14
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Damm C, Mallembakam MR, Voronov A, Peukert W. Production of filled hydrogels by mechanochemically induced polymerization. J Appl Polym Sci 2010. [DOI: 10.1002/app.33102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Erdemli O, Captug O, Bilgili H, Orhan D, Tezcaner A, Keskin D. In vitro and in vivo evaluation of the effects of demineralized bone matrix or calcium sulfate addition to polycaprolactone-bioglass composites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:295-308. [PMID: 19756968 DOI: 10.1007/s10856-009-3862-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Accepted: 08/22/2009] [Indexed: 05/28/2023]
Abstract
The objective of this study was to improve the efficacy of polycaprolactone/bioglass (PCL/BG) bone substitute using demineralized bone matrix (DBM) or calcium sulfate (CS) as a third component. Composite discs involving either DBM or CS were prepared by compression moulding. Bioactivity of discs was evaluated by energy dispersive X-ray spectroscopy (ESCA) and scanning electron microscopy (SEM) following simulated body fluid incubation. The closest Calcium/Phosphate ratio to that of hydroxyl carbonate apatite crystals was observed for PCL/ BG/DBM group (1.53) after 15 day incubation. Addition of fillers increased microhardness and compressive modulus of discs. However, after 4 and 6-week PBS incubations, PCL/BG/DBM discs showed significant decrease in modulus (from 266.23 to 54.04 and 33.45 MPa, respectively) in parallel with its highest water uptakes (36.3 and 34.7%). Discs preserved their integrity with only considerable weight loss (7.5-14.5%) in PCL/BG/DBM group. In vitro cytotoxicity tests showed that all discs were biocompatible.
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Affiliation(s)
- O Erdemli
- Department of Engineering Sciences, Middle East Technical University, 06531 Ankara, Turkey
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