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Kivijärvi T, Øyvind Goksøyr, Yassin MA, Jain S, Yamada S, Morales-López A, Mustafa K, Finne-Wistrand A. Hybrid material based on hyaluronan hydrogels and poly(l-lactide-co-1,3-trimethylene carbonate) scaffolds toward a cell-instructive microenvironment with long-term in vivo degradability. Mater Today Bio 2022; 17:100483. [DOI: 10.1016/j.mtbio.2022.100483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/14/2022] [Accepted: 10/29/2022] [Indexed: 11/16/2022] Open
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2
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Liu X, Jiang Z, Xing D, Yang Y, Li Z, Sun Z. Recent progress in nanocomposites of carbon dioxide fixation derived reproducible biomedical polymers. Front Chem 2022; 10:1035825. [PMID: 36277338 PMCID: PMC9585172 DOI: 10.3389/fchem.2022.1035825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 09/20/2022] [Indexed: 11/21/2022] Open
Abstract
In recent years, the environmental problems accompanying the extensive application of biomedical polymer materials produced from fossil fuels have attracted more and more attentions. As many biomedical polymer products are disposable, their life cycle is relatively short. Most of the used or overdue biomedical polymer products need to be burned after destruction, which increases the emission of carbon dioxide (CO2). Developing biomedical products based on CO2 fixation derived polymers with reproducible sources, and gradually replacing their unsustainable fossil-based counterparts, will promote the recycling of CO2 in this field and do good to control the greenhouse effect. Unfortunately, most of the existing polymer materials from renewable raw materials have some property shortages, which make them unable to meet the gradually improved quality and property requirements of biomedical products. In order to overcome these shortages, much time and effort has been dedicated to applying nanotechnology in this field. The present paper reviews recent advances in nanocomposites of CO2 fixation derived reproducible polymers for biomedical applications, and several promising strategies for further research directions in this field are highlighted.
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Affiliation(s)
- Xin Liu
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
| | - Zhiwen Jiang
- Department of Stomatology, China-Japan Union Hospital of Jilin University, Changchun, China
- *Correspondence: Zhiwen Jiang, ; Zhiying Li,
| | - Dejun Xing
- Tumor Hospital of Jilin Province, Changchun, China
| | - Yan Yang
- Tumor Hospital of Jilin Province, Changchun, China
| | - Zhiying Li
- Tumor Hospital of Jilin Province, Changchun, China
- *Correspondence: Zhiwen Jiang, ; Zhiying Li,
| | - Zhiqiang Sun
- Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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Frone AN, Popa MS, Uşurelu CD, Panaitescu DM, Gabor AR, Nicolae CA, Raduly MF, Zaharia A, Alexandrescu E. Bio-Based Poly(lactic acid)/Poly(butylene sebacate) Blends with Improved Toughness. Polymers (Basel) 2022; 14:polym14193998. [PMID: 36235947 PMCID: PMC9572606 DOI: 10.3390/polym14193998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 11/16/2022] Open
Abstract
A series of poly(butylene sebacate) (PBSe) aliphatic polyesters were successfully synthesized by the melt polycondensation of sebacic acid (Se) and 1,4-butanediol (BDO), two monomers manufactured on an industrial scale from biomass. The number average molecular weight (Mn) in the range from 6116 to 10,779 g/mol and the glass transition temperature (Tg) of the PBSe polyesters were tuned by adjusting the feed ratio between the two monomers. Polylactic acid (PLA)/PBSe blends with PBSe concentrations between 2.5 to 20 wt% were obtained by melt compounding. For the first time, PBSe’s effect on the flexibility and toughness of PLA was studied. As shown by the torque and melt flow index (MFI) values, the addition of PBSe endowed PLA with both enhanced melt processability and flexibility. The tensile tests and thermogravimetric analysis showed that PLA/PBSe blends containing 20 wt% PBSe obtained using a BDO molar excess of 50% reached an increase in elongation at break from 2.9 to 108%, with a negligible decrease in Young’s modulus from 2186 MPa to 1843 MPa, and a slight decrease in thermal performances. These results demonstrated the plasticizing efficiency of the synthesized bio-derived polyesters in overcoming PLA’s brittleness. Moreover, the tunable properties of the resulting PBSe can be of great industrial interest in the context of circular bioeconomy.
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Suliman S, Mieszkowska A, Folkert J, Rana N, Mohamed-Ahmed S, Fuoco T, Finne-Wistrand A, Dirscherl K, Jørgensen B, Mustafa K, Gurzawska-Comis K. Immune-instructive copolymer scaffolds using plant-derived nanoparticles to promote bone regeneration. Inflamm Regen 2022; 42:12. [PMID: 35366945 PMCID: PMC8977008 DOI: 10.1186/s41232-022-00196-9] [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: 08/19/2021] [Accepted: 02/13/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Age-driven immune signals cause a state of chronic low-grade inflammation and in consequence affect bone healing and cause challenges for clinicians when repairing critical-sized bone defects in elderly patients.
Methods
Poly(l-lactide-co-ɛ-caprolactone) (PLCA) scaffolds are functionalized with plant-derived nanoparticles from potato, rhamnogalacturonan-I (RG-I), to investigate their ability to modulate inflammation in vitro in neutrophils and macrophages at gene and protein levels. The scaffolds’ early and late host response at gene, protein and histological levels is tested in vivo in a subcutaneous rat model and their potential to promote bone regeneration in an aged rodent was tested in a critical-sized calvaria bone defect. Significant differences were tested using one-way ANOVA, followed by a multiple-comparison Tukey’s test with a p value ≤ 0.05 considered significant.
Results
Gene expressions revealed PLCA scaffold functionalized with plant-derived RG-I with a relatively higher amount of galactose than arabinose (potato dearabinated (PA)) to reduce the inflammatory state stimulated by bacterial LPS in neutrophils and macrophages in vitro. LPS-stimulated neutrophils show a significantly decreased intracellular accumulation of galectin-3 in the presence of PA functionalization compared to Control (unmodified PLCA scaffolds). The in vivo gene and protein expressions revealed comparable results to in vitro. The host response is modulated towards anti-inflammatory/ healing at early and late time points at gene and protein levels. A reduced foreign body reaction and fibrous capsule formation is observed when PLCA scaffolds functionalized with PA were implanted in vivo subcutaneously. PLCA scaffolds functionalized with PA modulated the cytokine and chemokine expressions in vivo during early and late inflammatory phases. PLCA scaffolds functionalized with PA implanted in calvaria defects of aged rats downregulating pro-inflammatory gene markers while promoting osteogenic markers after 2 weeks in vivo.
Conclusion
We have shown that PLCA scaffolds functionalized with plant-derived RG-I with a relatively higher amount of galactose play a role in the modulation of inflammatory responses both in vitro and in vivo subcutaneously and promote the initiation of bone formation in a critical-sized bone defect of an aged rodent. Our study addresses the increasing demand in bone tissue engineering for immunomodulatory 3D scaffolds that promote osteogenesis and modulate immune responses.
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Tsutsumi C, Nakayama S, Matsubara Y, Nakayama Y, Shiono T. An environmentally adaptable stereocomplex derived from lactide copolymers with improved UV shielding characteristics based on morphological changes. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2021.105148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Hara K, Hellem E, Yamada S, Sariibrahimoglu K, Mølster A, Gjerdet NR, Hellem S, Mustafa K, Yassin MA. Efficacy of treating segmental bone defects through endochondral ossification: 3D printed designs and bone metabolic activities. Mater Today Bio 2022; 14:100237. [PMID: 35280332 PMCID: PMC8914554 DOI: 10.1016/j.mtbio.2022.100237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 02/15/2022] [Accepted: 03/05/2022] [Indexed: 10/25/2022] Open
Abstract
Three-dimensional printing (3D printing) is a promising technique for producing scaffolds for bone tissue engineering applications. Porous scaffolds can be printed directly, and the design, shape and porosity can be controlled. 3D synthetic biodegradable polymeric scaffolds intended for in situ bone regeneration must meet stringent criteria, primarily appropriate mechanical properties, good 3D design, adequate biocompatibility and the ability to enhance bone formation. In this study, healing of critical-sized (5 mm) femur defects of rats was enhanced by implanting two different designs of 3D printed poly(l-lactide-co-ε-caprolactone) (poly(LA-co-CL)) scaffolds seeded with rat bone marrow mesenchymal stem cells (rBMSC), which had been pre-differentiated in vitro into cartilage-forming chondrocytes. Depending on the design, the scaffolds had an interconnected porous structure of 300-500 μm and porosity of 50-65%. According to a computational simulation, the internal force distribution was consistent with scaffold designs and comparable between the two designs. Moreover, the defects treated with 3D-printed scaffolds seeded with chondrocyte-like cells exhibited significantly increased bone formation up to 15 weeks compared with empty defects. In all experimental animals, bone metabolic activity was monitored by positron emission tomography 1, 3, 5, 7, 11 and 14 weeks after surgery. This demonstrated a time-dependent relationship between scaffold design and metabolic activity. This confirmed that successful regeneration was highly reproducible. The in vitro and in vivo data indicated that the experimental setups had promising outcomes and could facilitate new bone formation through endochondral ossification.
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Affiliation(s)
- Kenji Hara
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
- Department of Oral and Maxillofacial Surgery, Fujieda Heisei Memorial Hospital, Japan
| | - Endre Hellem
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Shuntaro Yamada
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Kemal Sariibrahimoglu
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Anders Mølster
- Department of Clinical Medicine University of Bergen, Bergen, Norway
| | - Nils R Gjerdet
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Sølve Hellem
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Kamal Mustafa
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
| | - Mohammed A Yassin
- Centre of Translational Oral Research (TOR) - Tissue Engineering Group, Department of Clinical Dentistry, University of Bergen, Bergen, Norway
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Adolfsson KH, Sjöberg I, Höglund OV, Wattle O, Hakkarainen M. In Vivo Versus In Vitro Degradation of a 3D Printed Resorbable Device for Ligation of Vascular Tissue in Horses. Macromol Biosci 2021; 21:e2100164. [PMID: 34339098 DOI: 10.1002/mabi.202100164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 06/14/2021] [Indexed: 11/09/2022]
Abstract
A resorbable 3D printed polydioxanone (PDO) device is manufactured to facilitate ligation of vascular tissue during surgery. The device must provide sufficient mechanical performance throughout the healing period. Therefore, degradation and mechanical performance of the device are investigated as a function of in vivo and in vitro aging. During aging the PDO device released cyclic and linear water-soluble products. In vivo aging resulted in higher relative number of linear oligomers in comparison to in vitro aging. A major loss of mechanical performance is observed after only 10 days in vivo and the Young's modulus (E) and tensile strength at break (σb ) decreased by 28% and 54%, respectively. This is in contrast to in vitro aging, where no loss of mechanical properties is observed during the same period. The in vivo aged devices exhibit clear holes in the matrices after 28 days, while apparent cracks are observed first after 140 days in vitro. These results highlight the sensitivity of the degradation process of resorbable devices with regards to the interactions of the device with the surrounding environment (tissues) and demonstrate the importance of in vivo testing as compliment to in vitro testing before clinical use of devices.
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Affiliation(s)
- Karin H Adolfsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, 100 44, Sweden
| | - Ida Sjöberg
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Odd V Höglund
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Ove Wattle
- Department of Clinical Sciences, SLU Swedish University of Agricultural Sciences, Uppsala, Box 7054, 750 07, Sweden
| | - Minna Hakkarainen
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, 100 44, Sweden
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8
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Abstract
Polymeric tissue adhesives provide versatile materials for wound management and are widely used in a variety of medical settings ranging from minor to life-threatening tissue injuries. Compared to the traditional methods of wound closure (i.e., suturing and stapling), they are relatively easy to use, enable rapid application, and introduce minimal tissue damage. Furthermore, they can act as hemostats to control bleeding and provide a tissue-healing environment at the wound site. Despite their numerous current applications, tissue adhesives still face several limitations and unresolved challenges (e.g., weak adhesion strength and poor mechanical properties) that limit their use, leaving ample room for future improvements. Successful development of next-generation adhesives will likely require a holistic understanding of the chemical and physical properties of the tissue-adhesive interface, fundamental mechanisms of tissue adhesion, and requirements for specific clinical applications. In this review, we discuss a set of rational guidelines for design of adhesives, recent progress in the field along with examples of commercially available adhesives and those under development, tissue-specific considerations, and finally potential functions for future adhesives. Advances in tissue adhesives will open new avenues for wound care and potentially provide potent therapeutics for various medical applications.
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Affiliation(s)
- Sungmin Nam
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02134, United States.,Wyss Institute for Biologically Inspired Engineering, Cambridge, Massachusetts 02115, United States
| | - David Mooney
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02134, United States.,Wyss Institute for Biologically Inspired Engineering, Cambridge, Massachusetts 02115, United States
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9
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Fuoco T, Cuartero M, Parrilla M, García-Guzmán JJ, Crespo GA, Finne-Wistrand A. Capturing the Real-Time Hydrolytic Degradation of a Library of Biomedical Polymers by Combining Traditional Assessment and Electrochemical Sensors. Biomacromolecules 2021; 22:949-960. [PMID: 33502851 PMCID: PMC7875459 DOI: 10.1021/acs.biomac.0c01621] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We have developed an innovative methodology to overcome the lack of techniques for real-time assessment of degradable biomedical polymers at physiological conditions. The methodology was established by combining polymer characterization techniques with electrochemical sensors. The in vitro hydrolytic degradation of a series of aliphatic polyesters was evaluated by following the molar mass decrease and the mass loss at different incubation times while tracing pH and l-lactate released into the incubation media with customized miniaturized electrochemical sensors. The combination of different analytical approaches provided new insights into the mechanistic and kinetics aspects of the degradation of these biomedical materials. Although molar mass had to reach threshold values for soluble oligomers to be formed and specimens' resorption to occur, the pH variation and l-lactate concentration were direct evidence of the resorption of the polymers and indicative of the extent of chain scission. Linear models were found for pH and released l-lactate as a function of mass loss for the l-lactide-based copolymers. The methodology should enable the sequential screening of degradable polymers at physiological conditions and has potential to be used for preclinical material's evaluation aiming at reducing animal tests.
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Affiliation(s)
- Tiziana Fuoco
- Department of Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 56-58, SE 100-44 Stockholm, Sweden
| | - Maria Cuartero
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44 Stockholm, Sweden
| | - Marc Parrilla
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44 Stockholm, Sweden
| | - Juan José García-Guzmán
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44 Stockholm, Sweden
| | - Gaston A Crespo
- Department of Chemistry, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 30, SE-100 44 Stockholm, Sweden
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Teknikringen 56-58, SE 100-44 Stockholm, Sweden
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10
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Recent Advances and Challenges in Controlling the Spatiotemporal Release of Combinatorial Anticancer Drugs from Nanoparticles. Pharmaceutics 2020; 12:pharmaceutics12121156. [PMID: 33261219 PMCID: PMC7759840 DOI: 10.3390/pharmaceutics12121156] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 12/11/2022] Open
Abstract
To overcome cancer, various chemotherapeutic studies are in progress; among these, studies on nano-formulated combinatorial drugs (NFCDs) are being actively pursued. NFCDs function via a fusion technology that includes a drug delivery system using nanoparticles as a carrier and a combinatorial drug therapy using two or more drugs. It not only includes the advantages of these two technologies, such as ensuring stability of drugs, selectively transporting drugs to cancer cells, and synergistic effects of two or more drugs, but also has the additional benefit of enabling the spatiotemporal and controlled release of drugs. This spatial and temporal drug release from NFCDs depends on the application of nanotechnology and the composition of the combination drug. In this review, recent advances and challenges in the control of spatiotemporal drug release from NFCDs are provided. To this end, the types of combinatorial drug release for various NFCDs are classified in terms of time and space, and the detailed programming techniques used for this are described. In addition, the advantages of the time and space differences in drug release in terms of anticancer efficacy are introduced in depth.
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11
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Mohamed-Ahmed S, Yassin MA, Rashad A, Espedal H, Idris SB, Finne-Wistrand A, Mustafa K, Vindenes H, Fristad I. Comparison of bone regenerative capacity of donor-matched human adipose-derived and bone marrow mesenchymal stem cells. Cell Tissue Res 2020; 383:1061-1075. [PMID: 33242173 PMCID: PMC7960590 DOI: 10.1007/s00441-020-03315-5] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 09/28/2020] [Indexed: 12/22/2022]
Abstract
Adipose-derived stem cells (ASC) have been used as an alternative to bone marrow mesenchymal stem cells (BMSC) for bone tissue engineering. However, the efficacy of ASC in bone regeneration in comparison with BMSC remains debatable, since inconsistent results have been reported. Comparing ASC with BMSC obtained from different individuals might contribute to this inconsistency in results. Therefore, this study aimed to compare the bone regenerative capacity of donor-matched human ASC and BMSC seeded onto poly(l-lactide-co-ε-caprolactone) scaffolds using calvarial bone defects in nude rats. First, donor-matched ASC and BMSC were seeded onto the co-polymer scaffolds to evaluate their in vitro osteogenic differentiation. Seeded scaffolds and scaffolds without cells (control) were then implanted in calvarial defects in nude rats. The expression of osteogenesis-related genes was examined after 4 weeks. Cellular activity was investigated after 4 and 12 weeks. Bone formation was evaluated radiographically and histologically after 4, 12, and 24 weeks. In vitro, ASC and BMSC demonstrated mineralization. However, BMSC showed higher alkaline phosphatase activity than ASC. In vivo, human osteogenesis–related genes Runx2 and collagen type I were expressed in defects with scaffold/cells. Defects with scaffold/BMSC had higher cellular activity than defects with scaffold/ASC. Moreover, bone formation in defects with scaffold/BMSC was greater than in defects with scaffold/ASC, especially at the early time-point. These results suggest that although ASC have the potential to regenerate bone, the rate of bone regeneration with ASC may be slower than with BMSC. Accordingly, BMSC are more suitable for bone regenerative applications.
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Affiliation(s)
- Samih Mohamed-Ahmed
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway.
| | - Mohammed A Yassin
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Ahmad Rashad
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Heidi Espedal
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Shaza B Idris
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Kamal Mustafa
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Hallvard Vindenes
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway.,Department for Plastic, Hand and Reconstructive Surgery, National Fire Damage Center, Bergen, Norway
| | - Inge Fristad
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
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Xing Z, Cai J, Sun Y, Cao M, Li Y, Xue Y, Finne-Wistrand A, Kamal M. Altered Surface Hydrophilicity on Copolymer Scaffolds Stimulate the Osteogenic Differentiation of Human Mesenchymal Stem Cells. Polymers (Basel) 2020; 12:polym12071453. [PMID: 32610488 PMCID: PMC7407625 DOI: 10.3390/polym12071453] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/22/2020] [Accepted: 06/24/2020] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Recent studies have suggested that both poly(l-lactide-co-1,5-dioxepan-2-one) (or poly(LLA-co-DXO)) and poly(l-lactide-co-ε-caprolactone) (or poly(LLA-co-CL)) porous scaffolds are good candidates for use as biodegradable scaffold materials in the field of tissue engineering; meanwhile, their surface properties, such as hydrophilicity, need to be further improved. METHODS We applied several different concentrations of the surfactant Tween 80 to tune the hydrophilicity of both materials. Moreover, the modification was applied not only in the form of solid scaffold as a film but also a porous scaffold. To investigate the potential application for tissue engineering, human bone marrow mesenchymal stem cells (hMSCs) were chosen to test the effect of hydrophilicity on cell attachment, proliferation, and differentiation. First, the cellular cytotoxicity of the extracted medium from modified scaffolds was investigated on HaCaT cells. Then, hMSCs were seeded on the scaffolds or films to evaluate cell attachment, proliferation, and osteogenic differentiation. The results indicated a significant increasing of wettability with the addition of Tween 80, and the hMSCs showed delayed attachment and spreading. PCR results indicated that the differentiation of hMSCs was stimulated, and several osteogenesis related genes were up-regulated in the 3% Tween 80 group. Poly(LLA-co-CL) with 3% Tween 80 showed an increased messenger Ribonucleic acid (mRNA) level of late-stage markers such as osteocalcin (OC) and key transcription factor as runt related gene 2 (Runx2). CONCLUSION A high hydrophilic scaffold may speed up the osteogenic differentiation for bone tissue engineering.
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Affiliation(s)
- Zhe Xing
- School of Stomatology, Lanzhou University, Lanzhou 730000, China; (Z.X.); (J.C.); (M.C.)
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, 5009 Bergen, Norway;
| | - Jiazheng Cai
- School of Stomatology, Lanzhou University, Lanzhou 730000, China; (Z.X.); (J.C.); (M.C.)
| | - Yang Sun
- Department of Fibre and Polymer Technology, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden; (Y.S.); (A.F.-W.)
| | - Mengnan Cao
- School of Stomatology, Lanzhou University, Lanzhou 730000, China; (Z.X.); (J.C.); (M.C.)
| | - Yi Li
- School of Stomatology, Lanzhou University, Lanzhou 730000, China; (Z.X.); (J.C.); (M.C.)
- Correspondence: (Y.L.); (Y.X.)
| | - Ying Xue
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, 5009 Bergen, Norway;
- Correspondence: (Y.L.); (Y.X.)
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, Royal Institute of Technology (KTH), SE-100 44 Stockholm, Sweden; (Y.S.); (A.F.-W.)
| | - Mustafa Kamal
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, 5009 Bergen, Norway;
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13
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Halligan S, Murray K, Hopkins M, Rogers I, Lyons J, Vrain O, Geever L. Enhancing and controlling the critical attributes of poly (
N
‐vinylcaprolactam) through electron beam irradiation for biomedical applications. J Appl Polym Sci 2020. [DOI: 10.1002/app.48639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Shane Halligan
- Applied Polymer Technologies GatewayMaterials Research Institute, Athlone Institute of Technology Ireland
| | | | - Michael Hopkins
- Applied Polymer Technologies GatewayMaterials Research Institute, Athlone Institute of Technology Ireland
| | - Ian Rogers
- Applied Polymer Technologies GatewayMaterials Research Institute, Athlone Institute of Technology Ireland
| | - John Lyons
- Applied Polymer Technologies GatewayMaterials Research Institute, Athlone Institute of Technology Ireland
| | | | - Luke Geever
- Applied Polymer Technologies GatewayMaterials Research Institute, Athlone Institute of Technology Ireland
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14
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Larrañaga A, Lizundia E. A review on the thermomechanical properties and biodegradation behaviour of polyesters. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.109296] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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15
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Sharma S, Xue Y, Xing Z, Yassin MA, Sun Y, Lorens JB, Finne-Wistrand A, Sapkota D, Mustafa K. Adenoviral mediated mono delivery of BMP2 is superior to the combined delivery of BMP2 and VEGFA in bone regeneration in a critical-sized rat calvarial bone defect. Bone Rep 2019; 10:100205. [PMID: 31193299 PMCID: PMC6525280 DOI: 10.1016/j.bonr.2019.100205] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 03/11/2019] [Accepted: 04/10/2019] [Indexed: 01/30/2023] Open
Abstract
Apart from osteogenesis, neovascularization of the defect area is an important determinant for successful bone healing. Accordingly, several studies have employed the combined delivery of VEGFA and BMP2 for bone regeneration. Nevertheless, the outcomes of these studies are highly variable. The aim of our study was to compare the effectiveness of adenoviral mediated delivery of BMP2 alone and in combination with VEGFA in rat bone marrow stromal cells (rBMSC) seeded on a poly(LLA-co-CL) scaffold in angiogenesis and osteogenesis using a critical-sized rat calvarial defect model. Both mono delivery of BMP2 and the combined delivery of a lower ratio of VEGFA and BMP2 (1:4) led to up-regulation of osteogenic genes (Alpl and Runx2) and increased calcium deposition in vitro, compared with the GFP control. Micro computed tomography (microCT) analysis of the rat calvarial defect at 8 weeks showed that the mono delivery of BMP2 (43.37 ± 3.55% defect closure) was the most effective in healing the bone defect, followed by the combined delivery of BMP2 and VEGFA (27.86 ± 2.89%) and other controls. Histological and molecular analyses supported the microCT findings. Analysis of the angiogenesis, however, showed that both mono delivery of BMP2 and combined delivery of BMP2 and VEGFA had similar angiogenic effect in the calvarial defects. Examination of the key genes related to host response against the adenoviral vectors showed that the current model system was not associated with adverse immune response. Overall, the results show that the mono delivery of BMP2 was superior to the combined delivery of BMP2 and VEGFA in healing the critical-sized rat calvarial bone defect. These findings underscore the importance of appropriate growth factor combination for the successful outcome in bone regeneration.
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Affiliation(s)
- Sunita Sharma
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Ying Xue
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Zhe Xing
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
| | - Mohammed A Yassin
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Yang Sun
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - James B Lorens
- Department of Biomedicine, University of Bergen, Bergen, Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Dipak Sapkota
- Department of Oral Biology, Faculty of Dentistry, 0316 Oslo, Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Bergen, Norway
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Pappalardo D, Mathisen T, Finne-Wistrand A. Biocompatibility of Resorbable Polymers: A Historical Perspective and Framework for the Future. Biomacromolecules 2019; 20:1465-1477. [PMID: 30855137 DOI: 10.1021/acs.biomac.9b00159] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The history of resorbable polymers containing glycolide, lactide, ε-caprolactone and trimethylene carbonate, with a special emphasis being placed on the time frame of the 1960s-1990s is described. Reviewing the history is valuable when looking into the future perspectives regarding how and where these monomers should be used. This story includes scientific evaluations indicating that these polymers are safe to use in medical devices, while the design of the medical device is not considered in this report. In particular, we present the data regarding the tissue response to implanted polymers, as well as the toxicity and pharmacokinetics of their degradation products. In the translation of these polymers from "the bench to the bedside," various challenges have been faced by surgeons, medical doctors, biologists, material engineers and polymer chemists. This Perspective highlights the visionary role played by the pioneers, addressing the problems that occurred on a case by case basis in translational medicine.
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Affiliation(s)
- Daniela Pappalardo
- Department of Science and Technology , University of Sannio , via dei Mulini , 82100 Benevento , Italy
| | | | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology , KTH Royal Institute of Technology , 114 28 Stockholm , Sweden
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17
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Manavitehrani I, Le TY, Daly S, Wang Y, Maitz PK, Schindeler A, Dehghani F. Formation of porous biodegradable scaffolds based on poly(propylene carbonate) using gas foaming technology. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 96:824-830. [DOI: 10.1016/j.msec.2018.11.088] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 11/20/2018] [Accepted: 11/30/2018] [Indexed: 10/27/2022]
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18
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Sun H, Liu CZ, Liu C, Tang M, Cao G, Zhang Q, Gu X. Employing the Sirolimus-Eluting Poly (Propylene Carbonate) Mesh for the Prevention of Arteriovenous Graft Stenosis in Rats. J Cardiovasc Pharmacol Ther 2018; 24:269-277. [PMID: 30474386 DOI: 10.1177/1074248418806060] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Poly (propylene carbonate, PPC) is a new member of the aliphatic polyester family. An outstanding feature of PPC is that it produces mainly water and carbon dioxide when degraded in vivo, causing minimal side effects. This unique property together with excellent biocompatibility and biodegradability makes PPC a promising material for drug delivery. In this study, we explored the effect of the sirolimus (an inhibitor of cell growth)-eluting PPC mesh on graft stenosis and its possible mechanisms in a rat arteriovenous grafting model. The PPC mesh was prepared by electrospinning. A jugular vein to abdominal aortic autograft transplantation model was established in rats. The graft was then treated by wrapping with the drug mesh or the drug-free mesh or left untreated. Four weeks posttransplantation, neointima was measured with hematoxylin and eosin staining, matrix metalloproteinase-2 (MMP-2), and MMP-9, and proliferating cell nuclear antigen (PCNA) in the grafts were assayed by Western blotting and immunohistochemistry, respectively. In vitro rat aortic adventitial fibroblast cell (RAAFC) migration was assessed using the Boyden chamber assay, and phospho-mammalian target of rapamycin (mTOR) levels in RAAFCs were determined by Western blotting. Animals with the drug mesh had an intimal area index of 4.87% ± 0.98%, significantly lower than that of the blank group (14.21% ± 2.56%) or the PPC group (15.03% ± 2.35%, both P < .05). The sirolimus mesh markedly suppressed MMP-2 and MMP-9 expression, decreased PCNA-positive cell numbers, inhibited RAAFC migration, and reduced phospho-mTOR levels. Our data suggest that the sirolimus-eluting PPC mesh might be potentially applied for the management of grafting stenosis.
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Affiliation(s)
- Hourong Sun
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Chuan-Zhen Liu
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Chunxiao Liu
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Mengmeng Tang
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Guangqing Cao
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
| | - Qiuwang Zhang
- 2 Division of Cardiology, Keenan Research Center for Biomedical Science, St. Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
| | - Xinghua Gu
- 1 Department of Cardiovascular Surgery, Qilu Hospital of Shandong University, Jinan, Shandong, China
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Laurent CP, Vaquette C, Liu X, Schmitt JF, Rahouadj R. Suitability of a PLCL fibrous scaffold for soft tissue engineering applications: A combined biological and mechanical characterisation. J Biomater Appl 2018; 32:1276-1288. [PMID: 29409376 DOI: 10.1177/0885328218757064] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Poly(lactide-co-ε-caprolactone) (PLCL) has been reported to be a good candidate for tissue engineering because of its good biocompatibility. Particularly, a braided PLCL scaffold (PLL/PCL ratio = 85/15) has been recently designed and partially validated for ligament tissue engineering. In the present study, we assessed the in vivo biocompatibility of acellular and cellularised scaffolds in a rat model. We then determined its in vitro biocompatibility using stem cells issued from both bone marrow and Wharton Jelly. From a biological point of view, the scaffold was shown to be suitable for tissue engineering in all these cases. Secondly, while the initial mechanical properties of this scaffold have been previously reported to be adapted to load-bearing applications, we studied the evolution in time of the mechanical properties of PLCL fibres due to hydrolytic degradation. Results for isolated PLCL fibres were extrapolated to the fibrous scaffold using a previously developed numerical model. It was shown that no accumulation of plastic strain was to be expected for a load-bearing application such as anterior cruciate ligament tissue engineering. However, PLCL fibres exhibited a non-expected brittle behaviour after two months. This may involve a potential risk of premature failure of the scaffold, unless tissue growth compensates this change in mechanical properties. This combined study emphasises the need to characterise the properties of biomaterials in a pluridisciplinary approach, since biological and mechanical characterisations led in this case to different conclusions concerning the suitability of this scaffold for load-bearing applications.
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Affiliation(s)
| | - Cédryck Vaquette
- 2 95541 Queensland University of Technology (QUT) , Brisbane, Australia
| | - Xing Liu
- 3 CNRS, IMoPA, UMR 7365, Biopôle, Université de Lorraine, France
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20
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Sharma S, Sapkota D, Xue Y, Rajthala S, Yassin MA, Finne-Wistrand A, Mustafa K. Delivery of VEGFA in bone marrow stromal cells seeded in copolymer scaffold enhances angiogenesis, but is inadequate for osteogenesis as compared with the dual delivery of VEGFA and BMP2 in a subcutaneous mouse model. Stem Cell Res Ther 2018; 9:23. [PMID: 29386057 PMCID: PMC5793460 DOI: 10.1186/s13287-018-0778-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 01/12/2018] [Accepted: 01/16/2018] [Indexed: 12/19/2022] Open
Abstract
Background In bone tissue engineering (BTE), extensive research into vascular endothelial growth factor A (VEGFA)-mediated angiogenesis has yielded inconsistent results. The aim of this study was to investigate the influence on angio- and osteogenesis of adenoviral-mediated delivery of VEGFA alone or in combination with bone morphogenetic protein 2 (BMP2) in bone marrow stromal cells (BMSC) seeded onto a recently developed poly(LLA-co-CL) scaffold. Methods Human BMSC were engineered to express VEGFA alone or in combination with BMP2 and seeded onto poly(LLA-co-CL) scaffolds. Changes in angiogenic and osteogenic gene and protein levels were examined by quantitative reverse-transcription polymerase chain reaction (RT-PCR), PCR array, and alkaline phosphatase assay. An in vivo subcutaneous mouse model was used to investigate the effect on angio- and osteogenesis of VEGFA alone or in combination with BMP2, using microcomputed tomography (μCT), histology, immunohistochemistry, and immunofluorescence. Results Combined delivery of a lower ratio (1:3) of VEGFA and BMP2 (ad-BMP2 + VEGFA) led to upregulation of osteogenic and angiogenic genes in vitro at 3 and 14 days, compared with mono-delivery of VEGFA (ad-VEGFA) and other controls. In vivo, in a subcutaneous mouse model, both ad-VEGFA and ad-BMP2 + VEGFA scaffold explants exhibited increased angiogenesis at 2 weeks. Enhanced angiogenesis was largely related to the recruitment and differentiation of mouse progenitor cells to the endothelial lineage and, to a lesser extent, to endothelial differentiation of the implanted BMSC. μCT and histological analyses revealed enhanced de novo bone formation only in the ad-BMP2 + VEGFA group, corresponding at the molecular level to the upregulation of genes related to osteogenesis, such as ALPL, RUNX2, and SPP1. Conclusions Although BMSC expressing VEGFA alone or in combination with BMP2 significantly induced angiogenesis, VEGFA alone failed to demonstrate osteogenic activity both in vitro and in vivo. These results not only call into question the use of VEGFA alone in bone regeneration, but also highlight the importance in BTE of appropriately formulated combined delivery of VEGFA and BMP2. Electronic supplementary material The online version of this article (10.1186/s13287-018-0778-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Sunita Sharma
- Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, 5020, Bergen, Norway.
| | - Dipak Sapkota
- Department of Oral Biology, Faculty of Dentistry, University of Oslo, 0316, Oslo, Norway
| | - Ying Xue
- Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, 5020, Bergen, Norway
| | - Saroj Rajthala
- The Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Mohammed A Yassin
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Kamal Mustafa
- Department of Clinical Dentistry, Centre for Clinical Dental Research, University of Bergen, 5020, Bergen, Norway.
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Manavitehrani I, Fathi A, Wang Y, Maitz PK, Mirmohseni F, Cheng TL, Peacock L, Little DG, Schindeler A, Dehghani F. Fabrication of a Biodegradable Implant with Tunable Characteristics for Bone Implant Applications. Biomacromolecules 2017; 18:1736-1746. [DOI: 10.1021/acs.biomac.7b00078] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Iman Manavitehrani
- The University of Sydney, School of Chemical
and Biomolecular Engineering, Sydney, 2006, Australia
| | - Ali Fathi
- The University of Sydney, School of Chemical
and Biomolecular Engineering, Sydney, 2006, Australia
| | - Yiwei Wang
- Burns
Research Group, ANZAC Research Institute, University of Sydney, Concord, New South Wales 2139, Australia
| | - Peter K. Maitz
- Burns
Research Group, ANZAC Research Institute, University of Sydney, Concord, New South Wales 2139, Australia
- Burns
and Reconstructive Surgery Unit, Concord Repatriation General Hospital, Concord, New South Wales 2139, Australia
| | - Farid Mirmohseni
- The University of Sydney, School of Chemical
and Biomolecular Engineering, Sydney, 2006, Australia
- Orthopaedic
Research and Biotechnology, The Children’s Hospital at Westmead, Westmead, 2145, Australia
| | - Tegan L. Cheng
- Orthopaedic
Research and Biotechnology, The Children’s Hospital at Westmead, Westmead, 2145, Australia
| | - Lauren Peacock
- Orthopaedic
Research and Biotechnology, The Children’s Hospital at Westmead, Westmead, 2145, Australia
| | - David G. Little
- Orthopaedic
Research and Biotechnology, The Children’s Hospital at Westmead, Westmead, 2145, Australia
- Paediatrics
and Child Health, University of Sydney, Sydney, 2006, Australia
| | - Aaron Schindeler
- Orthopaedic
Research and Biotechnology, The Children’s Hospital at Westmead, Westmead, 2145, Australia
- Paediatrics
and Child Health, University of Sydney, Sydney, 2006, Australia
| | - Fariba Dehghani
- The University of Sydney, School of Chemical
and Biomolecular Engineering, Sydney, 2006, Australia
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22
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Sun H, Gu X, Liu K, Fang C, Tang M. Applicability of electrospun polypropylene carbonate polymers as a drug carrier for sirolimus. Mol Med Rep 2017; 15:4253-4258. [PMID: 28487969 DOI: 10.3892/mmr.2017.6540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 03/08/2017] [Indexed: 11/05/2022] Open
Abstract
Polypropylene carbonate (PPC), a biodegradable aliphatic polyester, exhibits one particular advantage over other polyesters, which is that following degradation in vivo, it primarily produces H2O and CO2, causing minimal side effects. Although PPC exhibits limited mechanical strength, and is therefore not able to serve as a scaffold to support tissue regeneration, it may be suitable for drug delivery; however, this requires further investigation. In the present study, electrospinning was applied to generate PPC polymers containing sirolimus, a cell growth‑inhibiting drug which is used to treat restenosis. The properties of PPC‑sirolimus polymers were examined using scanning electron microscopy, differential scanning calorimetry and in vitro degradation assays. Drug loading and entrapment efficiency were determined, and in vitro sirolimus‑release from the polymer was assessed. Furthermore, the effect of PPC‑sirolimus polymers on cell growth was measured using an MTT assay in vitro. The results of the present study demonstrated that electrospun PPC polymers formed a uniform three‑dimensional, grid‑intertwined, net‑like structure; the surface of the polymers was smooth and the diameter was ~3 µm. Differential scanning calorimetry analysis demonstrated that sirolimus existed in an amorphous state in the polymer. Following soaking in PBS for 4 weeks, the polymer swelled and the net‑like structure broke down and fragmented. Sirolimus loading and entrapment efficiency were 10.3±3.2 and 95.1±10.6%, respectively. Sirolimus‑release from PPC‑sirolimus polymers continued for 28 days in PBS. PPC‑sirolimus markedly inhibited the growth of rat aortic adventitial fibroblast cells, an effect which was not observed with PPC alone. The results of the present study suggest that PPC polymers are a promising alternative drug carrier for sirolimus.
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Affiliation(s)
- Hourong Sun
- Department of Cardiovascular Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Xinghua Gu
- Department of Cardiovascular Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Kai Liu
- Department of Cardiovascular Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Changcun Fang
- Department of Cardiovascular Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
| | - Mengmeng Tang
- Department of Cardiovascular Surgery, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China
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23
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Shie MY, Chang WC, Wei LJ, Huang YH, Chen CH, Shih CT, Chen YW, Shen YF. 3D Printing of Cytocompatible Water-Based Light-Cured Polyurethane with Hyaluronic Acid for Cartilage Tissue Engineering Applications. MATERIALS 2017; 10:ma10020136. [PMID: 28772498 PMCID: PMC5459153 DOI: 10.3390/ma10020136] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 01/19/2017] [Accepted: 02/03/2017] [Indexed: 12/03/2022]
Abstract
Diseases in articular cartilages have affected millions of people globally. Although the biochemical and cellular composition of articular cartilages is relatively simple, there is a limitation in the self-repair ability of the cartilage. Therefore, developing strategies for cartilage repair is very important. Here, we report on a new liquid resin preparation process of water-based polyurethane based photosensitive materials with hyaluronic acid with application of the materials for 3D printed customized cartilage scaffolds. The scaffold has high cytocompatibility and is one that closely mimics the mechanical properties of articular cartilages. It is suitable for culturing human Wharton’s jelly mesenchymal stem cells (hWJMSCs) and the cells in this case showed an excellent chondrogenic differentiation capacity. We consider that the 3D printing hybrid scaffolds may have potential in customized tissue engineering and also facilitate the development of cartilage tissue engineering.
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Affiliation(s)
- Ming-You Shie
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- School of Dentistry, China Medical University, Taichung 40447, Taiwan.
| | - Wen-Ching Chang
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Li-Ju Wei
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Yu-Hsin Huang
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Chien-Han Chen
- School of Medicine, College of Medicine, China Medical University, Taichung 40447, Taiwan.
| | - Cheng-Ting Shih
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
| | - Yi-Wen Chen
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- Graduate Institute of Biomedical Sciences, China Medical University, Taichung 40447, Taiwan.
| | - Yu-Fang Shen
- 3D Printing Medical Research Center, China Medical University Hospital, China Medical University, Taichung 40447, Taiwan.
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 40447, Taiwan.
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24
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Yassin MA, Mustafa K, Xing Z, Sun Y, Fasmer KE, Waag T, Krueger A, Steinmüller-Nethl D, Finne-Wistrand A, Leknes KN. A Copolymer Scaffold Functionalized with Nanodiamond Particles Enhances Osteogenic Metabolic Activity and Bone Regeneration. Macromol Biosci 2017; 17. [DOI: 10.1002/mabi.201600427] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 12/13/2016] [Indexed: 12/31/2022]
Affiliation(s)
- Mohammed A. Yassin
- Department of Clinical Dentistry; Center for Clinical Dental Research Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry; Center for Clinical Dental Research Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
| | - Zhe Xing
- Department of Clinical Dentistry; Center for Clinical Dental Research Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
- Department of Clinical Science; Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
| | - Yang Sun
- Department of Clinical Dentistry; Center for Clinical Dental Research Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
- Department of Fibre and Polymer Technology, KTH; Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Kristine Eldevik Fasmer
- Center for Nuclear Medicine/PET; Department of Radiology; Haukeland University Hospital; N-5021 Bergen Norway
| | - Thilo Waag
- Institute of Organic Chemistry; University of Würzburg; 97070 Würzburg Germany
| | - Anke Krueger
- Institute of Organic Chemistry; University of Würzburg; 97070 Würzburg Germany
| | | | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, KTH; Royal Institute of Technology; SE-100 44 Stockholm Sweden
| | - Knut N. Leknes
- Department of Clinical Dentistry; Center for Clinical Dental Research Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
- Department of Clinical Dentistry-Periodontics; Faculty of Medicine and Dentistry; University of Bergen; N-5020 Bergen Norway
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25
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Dai Z, Ronholm J, Tian Y, Sethi B, Cao X. Sterilization techniques for biodegradable scaffolds in tissue engineering applications. J Tissue Eng 2016; 7:2041731416648810. [PMID: 27247758 PMCID: PMC4874054 DOI: 10.1177/2041731416648810] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/18/2016] [Indexed: 12/28/2022] Open
Abstract
Biodegradable scaffolds have been extensively studied due to their wide applications in biomaterials and tissue engineering. However, infections associated with in vivo use of these scaffolds by different microbiological contaminants remain to be a significant challenge. This review focuses on different sterilization techniques including heat, chemical, irradiation, and other novel sterilization techniques for various biodegradable scaffolds. Comparisons of these techniques, including their sterilization mechanisms, post-sterilization effects, and sterilization efficiencies, are discussed.
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Affiliation(s)
- Zheng Dai
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
| | - Jennifer Ronholm
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Yiping Tian
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
| | - Benu Sethi
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
| | - Xudong Cao
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
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26
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Yassin MA, Leknes KN, Sun Y, Lie SA, Finne-Wistrand A, Mustafa K. Surfactant tuning of hydrophilicity of porous degradable copolymer scaffolds promotes cellular proliferation and enhances bone formation. J Biomed Mater Res A 2016; 104:2049-59. [DOI: 10.1002/jbm.a.35741] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 03/09/2016] [Accepted: 04/06/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Mohammed A. Yassin
- Department of Clinical Dentistry; Faculty of Medicine and Dentistry; University of Bergen; Bergen Norway
| | - Knut N. Leknes
- Department of Clinical Dentistry; Faculty of Medicine and Dentistry; University of Bergen; Bergen Norway
| | - Yang Sun
- Department of Clinical Dentistry; Faculty of Medicine and Dentistry; University of Bergen; Bergen Norway
- Department of Fibre and Polymer Technology; Royal Institute of Technology (KTH); Stockholm Sweden
| | - Stein A. Lie
- Department of Clinical Dentistry; Faculty of Medicine and Dentistry; University of Bergen; Bergen Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology; Royal Institute of Technology (KTH); Stockholm Sweden
| | - Kamal Mustafa
- Department of Clinical Dentistry; Faculty of Medicine and Dentistry; University of Bergen; Bergen Norway
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27
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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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28
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Suliman S, Sun Y, Pedersen TO, Xue Y, Nickel J, Waag T, Finne‐Wistrand A, Steinmüller‐Nethl D, Krueger A, Costea DE, Mustafa K. In Vivo Host Response and Degradation of Copolymer Scaffolds Functionalized with Nanodiamonds and Bone Morphogenetic Protein 2. Adv Healthc Mater 2016; 5:730-42. [PMID: 26853449 DOI: 10.1002/adhm.201500723] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 10/30/2015] [Indexed: 12/22/2022]
Abstract
The aim is to evaluate the effect of modifying poly[(l-lactide)-co-(ε-caprolactone)] scaffolds (PLCL) with nanodiamonds (nDP) or with nDP+physisorbed BMP-2 (nDP+BMP-2) on in vivo host tissue response and degradation. The scaffolds are implanted subcutaneously in Balb/c mice and retrieved after 1, 8, and 27 weeks. Molecular weight analysis shows that modified scaffolds degrade faster than the unmodified. Gene analysis at week 1 shows highest expression of proinflammatory markers around nDP scaffolds; although the presence of inflammatory cells and foreign body giant cells is more prominent around the PLCL. Tissue regeneration markers are highly expressed in the nDP+BMP-2 scaffolds at week 8. A fibrous capsule is detectable by week 8, thinnest around nDP scaffolds and at week 27 thickest around PLCL scaffolds. mRNA levels of ALP, COL1α2, and ANGPT1 are significantly upregulating in the nDP+BMP-2 scaffolds at week 1 with ectopic bone seen at week 8. Even when almost 90% of the scaffold is degraded at week 27, nDP are observable at implantation areas without adverse effects. In conclusion, modifying PLCL scaffolds with nDP does not aggravate the host response and physisorbed BMP-2 delivery attenuates inflammation while lowering the dose of BMP-2 to a relatively safe and economical level.
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Affiliation(s)
- Salwa Suliman
- Department of Clinical Dentistry Center for Clinical Dental Research University of Bergen 5009 Bergen Norway
- Gade Laboratory for Pathology Department of Clinical Medicine University of Bergen 5020 Bergen Norway
- Center for International Health Department of Global Public Health and Primary Care University of Bergen 5009 Bergen Norway
| | - Yang Sun
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology 10044 Stockholm Sweden
| | - Torbjorn O. Pedersen
- Department of Clinical Dentistry Center for Clinical Dental Research University of Bergen 5009 Bergen Norway
| | - Ying Xue
- Department of Clinical Dentistry Center for Clinical Dental Research University of Bergen 5009 Bergen Norway
| | - Joachim Nickel
- Chair Tissue Engineering and Regenerative Medicine University Hospital of Würzburg 97070 Würzburg Germany
- Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Translational Center “Regenerative Therapies for Oncology and Musculoskeletal Diseases”‐ Würzburg branch D‐97070 Würzburg Germany
| | - Thilo Waag
- Institute of Organic Chemistry University of Würzburg 97074 Würzburg Germany
| | - Anna Finne‐Wistrand
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology 10044 Stockholm Sweden
| | | | - Anke Krueger
- Institute of Organic Chemistry University of Würzburg 97074 Würzburg Germany
| | - Daniela E. Costea
- Gade Laboratory for Pathology Department of Clinical Medicine University of Bergen 5020 Bergen Norway
- Center for International Health Department of Global Public Health and Primary Care University of Bergen 5009 Bergen Norway
- Department of Pathology Hauekeland University Hospital 5020 Bergen Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry Center for Clinical Dental Research University of Bergen 5009 Bergen Norway
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29
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Sharma S, Sapkota D, Xue Y, Sun Y, Finne-Wistrand A, Bruland O, Mustafa K. Adenoviral Mediated Expression of BMP2 by Bone Marrow Stromal Cells Cultured in 3D Copolymer Scaffolds Enhances Bone Formation. PLoS One 2016; 11:e0147507. [PMID: 26808122 PMCID: PMC4725849 DOI: 10.1371/journal.pone.0147507] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Accepted: 01/05/2016] [Indexed: 01/27/2023] Open
Abstract
Selection of appropriate osteoinductive growth factors, suitable delivery method and proper supportive scaffold are critical for a successful outcome in bone tissue engineering using bone marrow stromal cells (BMSC). This study examined the molecular and functional effect of a combination of adenoviral mediated expression of bone morphogenetic protein-2 (BMP2) in BMSC and recently developed and characterized, biodegradable Poly(L-lactide-co-є-caprolactone){poly(LLA-co-CL)}scaffolds in osteogenic molecular changes and ectopic bone formation by using in vitro and in vivo approaches. Pathway-focused custom PCR array, validation using TaqMan based quantitative RT-PCR (qRT-PCR) and ALP staining showed significant up-regulation of several osteogenic and angiogenic molecules, including ALPL and RUNX2 in ad-BMP2 BMSC group grown in poly(LLA-co-CL) scaffolds both at 3 and 14 days. Micro CT and histological analyses of the subcutaneously implanted scaffolds in NOD/SCID mice revealed significantly increased radiopaque areas, percentage bone volume and formation of vital bone in ad-BMP2 scaffolds as compared to the control groups both at 2 and 8 weeks. The increased bone formation in the ad-BMP2 group in vivo was paralleled at the molecular level with concomitant over-expression of a number of osteogenic and angiogenic genes including ALPL, RUNX2, SPP1, ANGPT1. The increased bone formation in ad-BMP2 explants was not found to be associated with enhanced endochondral activity as evidenced by qRT-PCR (SOX9 and FGF2) and Safranin O staining. Taken together, combination of adenoviral mediated BMP-2 expression in BMSC grown in the newly developed poly(LLA-co-CL) scaffolds induced expression of osteogenic markers and enhanced bone formation in vivo.
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Affiliation(s)
- Sunita Sharma
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
| | - Dipak Sapkota
- The Gade Laboratory for Pathology, Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Ying Xue
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
| | - Yang Sun
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
- Department of Fibre and Polymer Technology, Royal Institute of Technology, Stockholm, Sweden
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, Royal Institute of Technology, Stockholm, Sweden
| | - Ove Bruland
- Department of Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
| | - Kamal Mustafa
- Department of Clinical Dentistry, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
- * E-mail:
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30
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Manavitehrani I, Fathi A, Badr H, Daly S, Negahi Shirazi A, Dehghani F. Biomedical Applications of Biodegradable Polyesters. Polymers (Basel) 2016; 8:E20. [PMID: 30979116 PMCID: PMC6432531 DOI: 10.3390/polym8010020] [Citation(s) in RCA: 260] [Impact Index Per Article: 32.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/08/2016] [Accepted: 01/11/2016] [Indexed: 01/08/2023] Open
Abstract
The focus in the field of biomedical engineering has shifted in recent years to biodegradable polymers and, in particular, polyesters. Dozens of polyester-based medical devices are commercially available, and every year more are introduced to the market. The mechanical performance and wide range of biodegradation properties of this class of polymers allow for high degrees of selectivity for targeted clinical applications. Recent research endeavors to expand the application of polymers have been driven by a need to target the general hydrophobic nature of polyesters and their limited cell motif sites. This review provides a comprehensive investigation into advanced strategies to modify polyesters and their clinical potential for future biomedical applications.
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Affiliation(s)
- Iman Manavitehrani
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
| | - Ali Fathi
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
| | - Hesham Badr
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
| | - Sean Daly
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
| | - Ali Negahi Shirazi
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia.
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31
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Manavitehrani I, Fathi A, Wang Y, Maitz PK, Dehghani F. Reinforced Poly(Propylene Carbonate) Composite with Enhanced and Tunable Characteristics, an Alternative for Poly(lactic Acid). ACS APPLIED MATERIALS & INTERFACES 2015; 7:22421-22430. [PMID: 26376751 DOI: 10.1021/acsami.5b06407] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The acidic nature of the degradation products of polyesters often leads to unpredictable clinical complications, such as necrosis of host tissues and massive immune cell invasions. In this study, poly(propylene carbonate) (PPC) and starch composite is introduced with superior characteristics as an alternative to polyester-based polymers. The degradation products of PPC-starch composites are mainly carbon dioxide and water; hence, the associated risks to the acidic degradation of polyesters are minimized. Moreover, the compression strength of PPC-starch composites can be tuned over the range of 0.2±0.03 MPa to 33.9±1.51 MPa by changing the starch contents of composites to address different clinical needs. More importantly, the addition of 50 wt % starch enhances the thermal processing capacity of the composites by elevating their decomposition temperature from 245 to 276 °C. Therefore, thermal processing methods, such as extrusion and hot melt compression methods can be used to generate different shapes and structures from PPC-starch composites. We also demonstrated the cytocompatibility and biocompatibility of these composites by conducting in vitro and in vivo tests. For instance, the numbers of osteoblast cells were increased 2.5 fold after 7 days post culture. In addition, PPC composites in subcutaneous mice model resulted in mild inflammatory responses (e.g., the formation of fibrotic tissue) that were diminished from two to 4 weeks postimplantation. The long-term in vivo biodegradation of PPC composites are compared with poly(lactic acid) (PLA). The histochemical analysis revealed that after 8 weeks, the biodegradation of PLA leads to massive immune cell infusion and inflammation at the site, whereas the PPC composites are well-tolerated in vivo. All these results underline the favorable properties of PPC-starch composites as a benign biodegradable biomaterial for fabrication of biomedical implants.
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Affiliation(s)
- Iman Manavitehrani
- School of Chemical and Biomolecular Engineering, University of Sydney , Sydney, New South Wales 2006, Australia
| | - Ali Fathi
- School of Chemical and Biomolecular Engineering, University of Sydney , Sydney, New South Wales 2006, Australia
| | - Yiwei Wang
- Burns Research Group, ANZAC Research Institute, University of Sydney , Concord, New South Wales 2139, Australia
| | - Peter K Maitz
- Burns Research Group, ANZAC Research Institute, University of Sydney , Concord, New South Wales 2139, Australia
- Burns and Reconstructive Surgery Unit, Concord Repatriation General Hospital , Concord, New South Wales 2139, Australia
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, University of Sydney , Sydney, New South Wales 2006, Australia
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Yassin MA, Leknes KN, Pedersen TO, Xing Z, Sun Y, Lie SA, Finne-Wistrand A, Mustafa K. Cell seeding density is a critical determinant for copolymer scaffolds-induced bone regeneration. J Biomed Mater Res A 2015; 103:3649-58. [PMID: 26013960 PMCID: PMC4744655 DOI: 10.1002/jbm.a.35505] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/06/2015] [Accepted: 05/11/2015] [Indexed: 12/15/2022]
Abstract
Constructs intended for bone tissue engineering (TE) are influenced by the initial cell seeding density. Therefore, the objective of this study was to determine the effect of bone marrow stromal stem cells (BMSCs) density loaded onto copolymer scaffolds on bone regeneration. BMSCs were harvested from rat's bone marrow and cultured in media with or without osteogenic supplements. Cells were seeded onto poly(l‐lactide‐co‐ε‐caprolactone) [poly(LLA‐co‐CL)] scaffolds at two different densities: low density (1 × 106 cells/scaffold) or high density (2 × 106 cells/scaffold) using spinner modified flasks and examined after 1 and 3 weeks. Initial attachment and spread of BMSC onto the scaffolds was recorded by scanning electron microscopy. Cell proliferation was assessed by DNA quantification and cell differentiation by quantitative real‐time reverse transcriptase‐polymerized chain reaction analysis (qRT‐PCR). Five‐millimeter rat calvarial defects (24 defects in 12 rats) were implanted with scaffolds seeded with either low or high density expanded with or without osteogenic supplements. Osteogenic supplements significantly increased cell proliferation (p < 0.001). Scaffolds seeded at high cell density exhibited higher mRNA expressions of Runx2 p = 0.001, Col1 p = 0.001, BMP2 p < 0.001, BSP p < 0.001, and OC p = 0.013. More bone was formed in response to high cell seeding density (p = 0.023) and high seeding density with osteogenic medium (p = 0.038). Poly (LLA‐co‐CL) scaffolds could be appropriate candidates for bone TE. The optimal number of cells to be loaded onto scaffolds is critical for promoting Extracellular matrix synthesis and bone formation. Cell seeding density and osteogenic supplements may have a synergistic effect on the induction of new bone. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 103A: 3649–3658, 2015.
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Affiliation(s)
- Mohammed A Yassin
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
| | - Knut N Leknes
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
| | - Torbjorn O Pedersen
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
| | - Zhe Xing
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
| | - Yang Sun
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Teknikringen 42, SE-100 44, Stockholm, Sweden
| | - Stein A Lie
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Teknikringen 42, SE-100 44, Stockholm, Sweden
| | - Kamal Mustafa
- Faculty of Medicine and Dentistry, Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Årstadveien 19, N-5009, Bergen, Norway
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33
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Boimvaser S, Mariano RN, Turino LN, Vega JR. In vitro bulk/surface erosion pattern of PLGA implant in physiological conditions: a study based on auxiliary microsphere systems. Polym Bull (Berl) 2015. [DOI: 10.1007/s00289-015-1481-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Yuan Y, Jin X, Fan Z, Li S, Lu Z. In vivo degradation of copolymers prepared from L-lactide, 1,3-trimethylene carbonate and glycolide as coronary stent materials. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:139. [PMID: 25716020 DOI: 10.1007/s10856-015-5384-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/12/2014] [Indexed: 06/04/2023]
Abstract
A series of high molecular weight polymers were prepared by ring opening polymerization of L-lactide (L-LA), 1,3-trimethylene carbonate (TMC) and glycolide using stannous octoate as catalyst. The resulting polymers were characterized by gel permeation chromatography, (1)H nuclear magnetic resonance, differential scanning calorimeter and tensile tests. All the polymers present high molecular weights. Compared with PLLA and PTLA copolymers, the terpolymers exhibit interesting properties such as improved toughness and lowered crystallinity with only slightly reduced mechanical strength. In vivo degradation was performed by subcutaneous implantation in rats to evaluate the potential of the copolymers as bioresorbable coronary stent material. The results show that all the polymers conserved to a large extent their mechanical properties during the first 90 days, except the strain at break which exhibited a strong decrease. Meanwhile, significant molecular weight decrease and weight loss are detected in the case of terpolymers. Therefore, the PTLGA terpolymers present a good potential for the development of totally bioresorbable coronary stents.
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Affiliation(s)
- Yuan Yuan
- Department of Materials Science, Fudan University, 220 Handan Road, Shanghai, 200433, People's Republic of China
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35
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Suliman S, Xing Z, Wu X, Xue Y, Pedersen TO, Sun Y, Døskeland AP, Nickel J, Waag T, Lygre H, Finne-Wistrand A, Steinmüller-Nethl D, Krueger A, Mustafa K. Release and bioactivity of bone morphogenetic protein-2 are affected by scaffold binding techniques in vitro and in vivo. J Control Release 2014; 197:148-57. [PMID: 25445698 DOI: 10.1016/j.jconrel.2014.11.003] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 11/02/2014] [Accepted: 11/03/2014] [Indexed: 11/15/2022]
Abstract
A low dose of 1μg rhBMP-2 was immobilised by four different functionalising techniques on recently developed poly(l-lactide)-co-(ε-caprolactone) [(poly(LLA-co-CL)] scaffolds. It was either (i) physisorbed on unmodified scaffolds [PHY], (ii) physisorbed onto scaffolds modified with nanodiamond particles [nDP-PHY], (iii) covalently linked onto nDPs that were used to modify the scaffolds [nDP-COV] or (iv) encapsulated in microspheres distributed on the scaffolds [MICS]. Release kinetics of BMP-2 from the different scaffolds was quantified using targeted mass spectrometry for up to 70days. PHY scaffolds had an initial burst of release while MICS showed a gradual and sustained increase in release. In contrast, NDP-PHY and nDP-COV scaffolds showed no significant release, although nDP-PHY scaffolds maintained bioactivity of BMP-2. Human mesenchymal stem cells cultured in vitro showed upregulated BMP-2 and osteocalcin gene expression at both week 1 and week 3 in the MICS and nDP-PHY scaffold groups. These groups also demonstrated the highest BMP-2 extracellular protein levels as assessed by ELISA, and mineralization confirmed by Alizarin red. Cells grown on the PHY scaffolds in vitro expressed collagen type 1 alpha 2 early but the scaffold could not sustain rhBMP-2 release to express mineralization. After 4weeks post-implantation using a rat mandible critical-sized defect model, micro-CT and Masson trichrome results showed accelerated bone regeneration in the PHY, nDP-PHY and MICS groups. The results demonstrate that PHY scaffolds may not be desirable for clinical use, since similar osteogenic potential was not seen under both in vitro and in vivo conditions, in contrast to nDP-PHY and MICS groups, where continuous low doses of BMP-2 induced satisfactory bone regeneration in both conditions. The nDP-PHY scaffolds used here in critical-sized bone defects for the first time appear to have promise compared to growth factors adsorbed onto a polymer alone and the short distance effect prevents adverse systemic side effects.
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Affiliation(s)
- Salwa Suliman
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway.
| | - Zhe Xing
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Xujun Wu
- Department of Cranio-Maxillofacial and Oral Surgery, Medical University of Innsbruck, Innsbruck, Austria
| | - Ying Xue
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Torbjorn O Pedersen
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway
| | - Yang Sun
- Department of Fibre and Polymer Technology, Royal Institute of Technology, KTH, Stockholm, Sweden
| | | | - Joachim Nickel
- Chair Tissue Engineering and Regenerative Medicine, University Hospital of Würzburg, Germany; Fraunhofer Project Group Regenerative Technologies in Oncology, Würzburg, Germany
| | - Thilo Waag
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Henning Lygre
- Department of Clinical Science, University of Bergen, Bergen, Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology, Royal Institute of Technology, KTH, Stockholm, Sweden
| | | | - Anke Krueger
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Kamal Mustafa
- Department of Clinical Dentistry, Center for Clinical Dental Research, University of Bergen, Norway.
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Skodje A, Idris SBM, Sun Y, Bartaula S, Mustafa K, Finne-Wistrand A, Wikesjö UME, Leknes KN. Biodegradable polymer scaffolds loaded with low-dose BMP-2 stimulate periodontal ligament cell differentiation. J Biomed Mater Res A 2014; 103:1991-8. [DOI: 10.1002/jbm.a.35334] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 08/22/2014] [Accepted: 09/10/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Anders Skodje
- Faculty of Medicine and Dentistry; Department of Clinical Dentistry - Periodontics; University of Bergen; Bergen Norway
| | - Shaza Bushra M. Idris
- Faculty of Medicine and Dentistry; Department of Clinical Dentistry - Center for Clinical Dental Research; University of Bergen; Bergen Norway
| | - Yang Sun
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm Sweden
| | - Sushma Bartaula
- Faculty of Medicine and Dentistry; Department of Clinical Dentistry - Center for Clinical Dental Research; University of Bergen; Bergen Norway
| | - Kamal Mustafa
- Faculty of Medicine and Dentistry; Department of Clinical Dentistry - Center for Clinical Dental Research; University of Bergen; Bergen Norway
| | - Anna Finne-Wistrand
- Department of Fibre and Polymer Technology; KTH Royal Institute of Technology; Stockholm Sweden
| | - Ulf M. E. Wikesjö
- Laboratory for Applied Periodontal & Craniofacial Regeneration; Georgia Regents University; Augusta GA, USA
| | - Knut N. Leknes
- Faculty of Medicine and Dentistry; Department of Clinical Dentistry - Periodontics; University of Bergen; Bergen Norway
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Mahjoubi H, Kinsella JM, Murshed M, Cerruti M. Surface modification of poly(D,L-lactic acid) scaffolds for orthopedic applications: a biocompatible, nondestructive route via diazonium chemistry. ACS APPLIED MATERIALS & INTERFACES 2014; 6:9975-9987. [PMID: 24965034 DOI: 10.1021/am502752j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Scaffolds made with synthetic polymers such as polyesters are commonly used in bone tissue engineering. However, their hydrophobicity and the lack of specific functionalities make their surface not ideal for cell adhesion and growth. Surface modification of these materials is thus crucial to enhance the scaffold's integration in the body. Different surface modification techniques have been developed to improve scaffold biocompatibility. Here we show that diazonium chemistry can be used to modify the outer and inner surfaces of three-dimensional poly(D,L-lactic acid) (PDLLA) scaffolds with phosphonate groups, using a simple two-step method. By changing reaction time and impregnation procedure, we were able to tune the concentration of phosphonate groups present on the scaffolds, without degrading the PDLLA matrix. To test the effectiveness of this modification, we immersed the scaffolds in simulated body fluid, and characterized them with scanning electron microscopy, X-ray photoelectron spectroscopy, Raman, and infrared spectroscopy. Our results showed that a layer of hydroxyapatite particles was formed on all scaffolds after 2 and 4 weeks of immersion; however, the precipitation was faster and in larger amounts on the phosphonate-modified than on the bare PDLLA scaffolds. Both osteogenic MC3T3-E1 and chondrogenic ATDC5 cell lines showed increased cell viability/metabolic activity when grown on a phosphonated PDLLA surface in comparison to a control PDLLA surface. Also, more calcium-containing minerals were deposited by cultures grown on phosphonated PDLLA, thus showing the pro-mineralization properties of the proposed modification. This work introduces diazonium chemistry as a simple and biocompatible technique to modify scaffold surfaces, allowing to covalently and homogeneously bind a number of functional groups without degrading the scaffold's polymeric matrix.
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Affiliation(s)
- Hesameddin Mahjoubi
- Department of Materials Engineering, McGill University , Montreal, Quebec H3A 0C5, Canada
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Sun Y, Xing Z, Xue Y, Mustafa K, Finne-Wistrand A, Albertsson AC. Surfactant as a Critical Factor When Tuning the Hydrophilicity in Three-Dimensional Polyester-Based Scaffolds: Impact of Hydrophilicity on Their Mechanical Properties and the Cellular Response of Human Osteoblast-Like Cells. Biomacromolecules 2014; 15:1259-68. [DOI: 10.1021/bm401818e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yang Sun
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Zhe Xing
- Department
of Clinical Dentistry-Center for Clinical Dental Research, Faculty
of Medicine and Dentistry, University of Bergen, Norway
| | - Ying Xue
- Department
of Clinical Dentistry-Center for Clinical Dental Research, Faculty
of Medicine and Dentistry, University of Bergen, Norway
| | - Kamal Mustafa
- Department
of Clinical Dentistry-Center for Clinical Dental Research, Faculty
of Medicine and Dentistry, University of Bergen, Norway
| | - Anna Finne-Wistrand
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Ann-Christine Albertsson
- Department
of Fibre and Polymer Technology, KTH Royal Institute of Technology, Stockholm, Sweden
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39
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Wong Y, Kong J, Widjaja LK, Venkatraman SS. Biomedical applications of shape-memory polymers: how practically useful are they? Sci China Chem 2014. [DOI: 10.1007/s11426-013-5061-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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40
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Fagerland J, Finne-Wistrand A. Mapping the synthesis and the impact of low molecular weight PLGA-g-PEG on sol–gel properties to design hierarchical porous scaffolds. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0337-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Aminlashgari N, Höglund OV, Borg N, Hakkarainen M. Degradation profile and preliminary clinical testing of a resorbable device for ligation of blood vessels. Acta Biomater 2013; 9:6898-904. [PMID: 23438863 DOI: 10.1016/j.actbio.2013.02.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 01/11/2013] [Accepted: 02/05/2013] [Indexed: 11/18/2022]
Abstract
A resorbable device for ligation of blood vessels was developed and tested in vitro to reveal the degradation profile of the device and to predict the clinical performance in terms of adequate mechanical support during a healing period of 1week. In addition, preliminary clinical testing was performed that showed complete hemostasis and good tissue grip of renal arteries in five pigs. The device was made by injection molding of poly(glycolide-co-trimethylene carbonate) triblock copolymer, and it consisted of a case with a locking mechanism connected to a partly perforated flexible band. A hydrolytic degradation study was carried out for 7, 30 and 60days in water and buffer medium, following the changes in mass, water absorption, pH and mechanical properties. A new rapid matrix-free laser desorption ionization-mass spectrometry (LDI-MS) method was developed for direct screening of degradation products released into the degradation medium. The combination of LDI-MS and electrospray ionization-mass spectrometry analyses enabled the comparison of the degradation product patterns in water and buffer medium. The identified degradation products were rich in trimethylene carbonate units, indicating preferential hydrolysis of amorphous regions where trimethylene units are located. The crystallinity of the material was doubled after 60days of hydrolysis, additionally confirming the preferential hydrolysis of trimethylene carbonate units and the enrichment of glycolide units in the remaining solid matrix. The mechanical performance of the perforated band was followed for the first week of hydrolysis and the results suggest that sufficient strength is retained during the healing time of the blood vessels.
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Affiliation(s)
- Nina Aminlashgari
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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42
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Mohammad AK, Reineke JJ. Quantitative Detection of PLGA Nanoparticle Degradation in Tissues following Intravenous Administration. Mol Pharm 2013; 10:2183-9. [DOI: 10.1021/mp300559v] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Abdul Khader Mohammad
- Department of Pharmaceutical
Sciences, Eugene Applebaum
College of Pharmacy and Health Sciences, Wayne State University, Detroit,
Michigan 48201, United States
| | - Joshua J. Reineke
- Department of Pharmaceutical
Sciences, Eugene Applebaum
College of Pharmacy and Health Sciences, Wayne State University, Detroit,
Michigan 48201, United States
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43
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Gamma irradiation of active self-healing PLGA microspheres for efficient aqueous encapsulation of vaccine antigens. Pharm Res 2013; 30:1768-78. [PMID: 23515830 DOI: 10.1007/s11095-013-1019-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 03/01/2013] [Indexed: 01/20/2023]
Abstract
PURPOSE To investigate the effect of γ-irradiation of poly(lactic-co-glycolic acid) (PLGA)/Al(OH)₃/0 or 5 wt% diethyl phthalate (DEP) microspheres for active self-healing encapsulation of vaccine antigens. METHODS Microspheres were irradiated with ⁶⁰Co at 2.5 and 1.8 MRad and 0.37 and 0.20 MRad/h. Encapsulation of tetanus toxoid (TT) was achieved by mixing Al(OH)₃-PLGA microspheres with TT solution at 10-38°C. Electron paramagnetic resonance (EPR) spectroscopy was used to examine free radical formation. Glass transition temperature (T(g)) and molecular weight of PLGA was measured by differential scanning calorimetry and gel permeation chromatography, respectively. Loading and release of TT were examined by modified Bradford, amino acid analysis, and ELISA assays. RESULTS EPR spectroscopy results indicated absence of free radicals in PLGA microspheres after γ-irradiation. Antigen-sorbing capacity, encapsulation efficiency, and T(g) of the polymer were also not adversely affected. When DEP-loaded microspheres were irradiated at 0.2 MRad/h, some PLGA pores healed during irradiation and PLGA healing during encapsulation was suppressed. The molecular weight of PLGA was slightly reduced when DEP-loaded microspheres were irradiated at the same dose rate. At the 0.37 MRad/h dose rate, these trends were not observed and the full immunoreactivity of TT was preserved during encapsulation and 1-month release. Gamma irradiation slightly increased TT initial burst release. The small increase in total irradiation dose from 1.8 to 2.5 MRad had insignificant effect on the polymer and microspheres properties analyzed. CONCLUSIONS Gamma irradiation is a plausible approach to provide a terminally sterilized, self-healing encapsulation PLGA excipient for vaccine delivery.
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Dånmark S, Gladnikoff M, Frisk T, Zelenina M, Mustafa K, Russom A, Finne-Wistrand A. Development of a novel microfluidic device for long-term in situ monitoring of live cells in 3-dimensional matrices. Biomed Microdevices 2013; 14:885-93. [PMID: 22714394 DOI: 10.1007/s10544-012-9668-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Using the latest innovations in microfabrication technology, 3-dimensional microfluidic cell culture systems have been developed as an attractive alternative to traditional 2-dimensional culturing systems as a model for long-term microscale cell-based research. Most microfluidic systems are based on the embedding of cells in hydrogels. However, physiologically realistic conditions based on hydrogels are difficult to obtain and the systems are often too complicated. We have developed a microfluidic cell culture device that incorporates a biodegradable rigid 3D polymer scaffold using standard soft lithography methods. The device permits repeated high-resolution fluorescent imaging of live cell populations within the matrix over a 4 week period. It was also possible to track cell development at the same spatial location throughout this time. In addition, human primary periodontal ligament cells were induced to produce quantifiable calcium deposits within the system. This simple and versatile device should be readily applicable for cell-based studies that require long-term culture and high-resolution bioimaging.
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Affiliation(s)
- Staffan Dånmark
- Department of Fibre and Polymer Technology, School of Chemical Science and Engineering, KTH Royal Institute of Technology, Teknikringen 56-58, 10044 Stockholm, Sweden
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Oral and Maxillo-facial. Regen Med 2013. [DOI: 10.1007/978-94-007-5690-8_32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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46
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Xing Z, Xue Y, Finne-Wistrand A, Yang ZQ, Mustafa K. Copolymer cell/scaffold constructs for bone tissue engineering: co-culture of low ratios of human endothelial and osteoblast-like cells in a dynamic culture system. J Biomed Mater Res A 2012; 101:1113-20. [PMID: 23015514 DOI: 10.1002/jbm.a.34414] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Revised: 07/24/2012] [Accepted: 08/01/2012] [Indexed: 11/07/2022]
Abstract
The aim of this study was to compare the effect of different ratios of human umbilical vein endothelial cells (HUVECs) on osteogenic activity of human osteoblast-like cells (HOB) and capillary-like structure (CLS), seeded into copolymer scaffolds in a dynamic culture system. HOB and HUVEC were co-cultured into poly(L-lactide)-co-(1,5-dioxepan-2-one) [poly(LLA-co-DXO)] scaffolds at ratios of 5:1 (5:1 group) and 2:1 (2:1 group). Samples were collected after 5, 15, and 25 days. Cross-sections were processed and the CLS from HUVEC was disclosed in both groups. Cell viability was determined by dsDNA assay. Cells seeded at the ratio of 5:1 had good viability. Total RNA was isolated and the reverse transcription reaction was performed. The influences on the expression of several osteogenic genes were various with regarding to different ratios of HUVEC demonstrated by the PCR array. The RT-PCR results was in consistent with the PCR array results that several osteogenesis related genes had higher expression in the 5:1 group than in the 2:1 group, especially at day 25, such as alkaline phosphatase, insulin-like growth factor 1 (IGF1), and so forth. ELISA showed that the production of IGF1 after 25 days of incubation were higher in cells co-cultured at the 5:1 ratio than at the 2:1 ratio. The results show that under dynamic culture conditions, co-culture of HOB with a low ratio of HUVEC in copolymer scaffolds results in CLS formation and significantly influenced the expression of osteogenic markers.
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Affiliation(s)
- Zhe Xing
- Department of Clinical Dentistry-Center for Clinical Dental Research, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway.
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Sun Y, Finne-Wistrand A, Albertsson AC, Xing Z, Mustafa K, Hendrikson WJ, Grijpma DW, Moroni L. Degradable amorphous scaffolds with enhanced mechanical properties and homogeneous cell distribution produced by a three-dimensional fiber deposition method. J Biomed Mater Res A 2012; 100:2739-49. [DOI: 10.1002/jbm.a.34210] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 03/30/2012] [Indexed: 01/29/2023]
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Höglund A, Odelius K, Albertsson AC. Crucial differences in the hydrolytic degradation between industrial polylactide and laboratory-scale poly(L-lactide). ACS APPLIED MATERIALS & INTERFACES 2012; 4:2788-2793. [PMID: 22563747 PMCID: PMC3359772 DOI: 10.1021/am300438k] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2012] [Accepted: 05/07/2012] [Indexed: 05/29/2023]
Abstract
The rate of degradation of large-scale synthesized polylactide (PLA) of industrial origin was compared with that of laboratory-scale synthesized poly(L-lactide) (PLLA) of similar molar mass. The structural discrepancy between the two material types resulted in a significant difference in degradation rate. Although the hydrolysis of industrial PLA was substantially faster than that of PLLA, the PLA material became less brittle and fragmented to a lesser extent during degradation. In addition, a comprehensive picture of the degradation of industrial PLA was obtained by subjecting different PLA materials to hydrolytic degradation at various temperatures and pH's for up to 182 days. The surrounding environment had no effect on the degradation rate at physiological temperature, but the degradation was faster in water than in a phosphate buffer after prolonged degradation at temperatures above the T(g). The degree of crystallinity had a greater influence than the degradation environment on the rate of hydrolysis. For a future use of polylactide in applications where bulk plastics are generally used today, for example plastic packages, the appropriate PLA grade must be chosen based on the conditions prevailing in the degradation environment.
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Dånmark S, Finne-Wistrand A, Albertsson AC, Patarroyo M, Mustafa K. Integrin-mediated adhesion of human mesenchymal stem cells to extracellular matrix proteins adsorbed to polymer surfaces. Biomed Mater 2012; 7:035011. [PMID: 22475565 DOI: 10.1088/1748-6041/7/3/035011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In vitro, degradable aliphatic polyesters are widely used as cell carriers for bone tissue engineering, despite their lack of biological cues. Their biological active surface is rather determined by an adsorbed layer of proteins from the surrounding media. Initial cell fate, including adhesion and proliferation, which are key properties for efficient cell carriers, is determined by the adsorbed layer of proteins. Herein we have investigated the ability of human bone marrow derived stem cells (hBMSC) to adhere to extracellular matrix (ECM) proteins, including fibronectin and vitronectin which are present in plasma and serum. hBMSC expressed integrins for collagens, laminins, fibronectin and vitronectin. Accordingly, hBMSC strongly adhered to these purified ECM proteins by using the corresponding integrins. Although purified fibronectin and vitronectin adsorbed to aliphatic polyesters to a lower extent than to cell culture polystyrene, these low levels were sufficient to mediate adhesion of hBMSC. It was found that plasma- and serum-coated polystyrene adsorbed significant levels of both fibronectin and vitronectin, and fibronectin was identified as the major adhesive component of plasma for hBMSC; however, aliphatic polyesters adsorbed minimal levels of fibronectin under similar conditions resulting in impaired cell adhesion. Altogether, the results suggest that the efficiency of aliphatic polyesters cell carriers could be improved by increasing their ability to adsorb fibronectin.
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Affiliation(s)
- S Dånmark
- Department of Clinical Dentistry-Centre for Clinical Dental Research, Faculty of Medicine and Dentistry, University of Bergen, Bergen, Norway
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Beslikas T, Gigis I, Goulios V, Christoforides J, Papageorgiou GZ, Bikiaris DN. Crystallization study and comparative in vitro-in vivo hydrolysis of PLA reinforcement ligament. Int J Mol Sci 2011; 12:6597-618. [PMID: 22072906 PMCID: PMC3210997 DOI: 10.3390/ijms12106597] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Revised: 09/24/2011] [Accepted: 09/28/2011] [Indexed: 11/16/2022] Open
Abstract
In the present work, the crystallization behavior and in vitro-in vivo hydrolysis rates of PLA absorbable reinforcement ligaments used in orthopaedics for the repair and reinforcement of articulation instabilities were studied. Tensile strength tests showed that this reinforcement ligament has similar mechanical properties to Fascia Latta, which is an allograft sourced from the ilio-tibial band of the human body. The PLA reinforcement ligament is a semicrystalline material with a glass transition temperature around 61 °C and a melting point of ~178 °C. Dynamic crystallization revealed that, although the crystallization rates of the material are slow, they are faster than the often-reported PLA crystallization rates. Mass loss and molecular weight reduction measurements showed that in vitro hydrolysis at 50 °C initially takes place at a slow rate, which gets progressively higher after 30-40 days. As found from SEM micrographs, deterioration of the PLA fibers begins during this time. Furthermore, as found from in vivo hydrolysis in the human body, the PLA reinforcement ligament is fully biocompatible and after 6 months of implantation is completely covered with flesh. However, the observed hydrolysis rate from in vivo studies was slow due to high molecular weight and degree of crystallinity.
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Affiliation(s)
- Theodore Beslikas
- 2nd Orthopaedic Department, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mails: (T.B.); (I.G.); (V.G.); (J.C.)
| | - Ioannis Gigis
- 2nd Orthopaedic Department, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mails: (T.B.); (I.G.); (V.G.); (J.C.)
| | - Vasilios Goulios
- 2nd Orthopaedic Department, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mails: (T.B.); (I.G.); (V.G.); (J.C.)
| | - John Christoforides
- 2nd Orthopaedic Department, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mails: (T.B.); (I.G.); (V.G.); (J.C.)
| | - George Z. Papageorgiou
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mail:
| | - Dimitrios N. Bikiaris
- Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, Thessaloniki, Macedonia 54124, Greece; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +30-2310-997812; Fax: +30-2310-997667
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