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Trousil J, Cabral JV, Voukali E, Nováčková J, Pop-Georgievski O, Vacík T, Studený P, Studenovska H, Jirsova K. Electrospun poly(l-lactide- co-dl-lactide) nanofibrous scaffold as substrate for ex vivo limbal epithelial cell cultivation. Heliyon 2024; 10:e30970. [PMID: 38803982 PMCID: PMC11128869 DOI: 10.1016/j.heliyon.2024.e30970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 03/13/2024] [Accepted: 05/08/2024] [Indexed: 05/29/2024] Open
Abstract
Ultrathin electrospun poly (l-lactide-co-dl-lactide) nanofibrous membranes coated with fibronectin were explored as scaffolds for the ex vivo cultivation of limbal epithelial cells (LECs) for the treatment of limbal stem cell deficiency. The developed scaffolds were compared with the "gold-standard" fibrin gel. The resulting membranes composed of nanofibers possessed a very low thickness of 4 μm and allowed very good optical transparency in the wet state. The fibronectin-coated nanofibrous scaffolds demonstrated LEC expansion and successful cultivation similar to that on fibrin gel. Unlike the regular cobblestone epithelial cell morphology on the fibrin gel, the nanofibrous scaffold presented a mostly irregular epithelial morphology with a shift to a mesenchymal phenotype, as confirmed by the upregulation of profibroblastic genes: ACTA2 (p = 0.023), FBLN1 (p < 0.001), and THY1 (p < 0.001). Both culture conditions revealed comparable expression of stem cell markers, including KLF4, ΔNp63α and ABCG2, emphasizing the promise of polylactide-based nanofibrous membranes for further investigations.
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Affiliation(s)
- Jiří Trousil
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Joao Victor Cabral
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Eleni Voukali
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Jitka Nováčková
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Ognen Pop-Georgievski
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Tomáš Vacík
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
| | - Pavel Studený
- Ophthalmology Department, Third Faculty of Medicine, Charles University and University Hospital Kralovske Vinohrady, Prague, Czech Republic
| | - Hana Studenovska
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Katerina Jirsova
- Institute of Biology and Medical Genetics, First Faculty of Medicine, Charles University and General University Hospital in Prague, Prague, Czech Republic
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Li J, Hu S, Feng P, Xia Y, Pei Z, Tian J, Jiang K, Liu L, Cai X, Wu P. Brucine Sulfate, a Novel Bacteriostatic Agent in 3D Printed Bone Scaffold Systems. Polymers (Basel) 2024; 16:1428. [PMID: 38794621 PMCID: PMC11124991 DOI: 10.3390/polym16101428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2024] [Revised: 04/28/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Bacterial infection is a common complication in bone defect surgery, in which infection by clinically resistant bacteria has been a challenge for the medical community. Given this emerging problem, the discovery of novel natural-type inhibitors of drug-resistant bacteria has become imperative. Brucine, present in the traditional Chinese herb Strychnine semen, is reported to exert analgesic and anti-inflammatory effects. Brucine's clinical application was limited because of its water solubility. We extracted high-purity BS by employing reflux extraction and crystallization, greatly improved its solubility, and evaluated its antimicrobial activity against E. coli and S. aureus. Importantly, we found that BS inhibited the drug-resistant strains significantly better than standard strains and achieved sterilization by disrupting the bacterial cell wall. Considering the safety concerns associated with the narrow therapeutic window of BS, a 3D BS-PLLA/PGA bone scaffold system was constructed with SLS technology and tested for its performance, bacteriostatic behaviors, and biocompatibility. The results have shown that the drug-loaded bone scaffolds had not only long-term, slow-controlled release with good cytocompatibility but also demonstrated significant antimicrobial activity in antimicrobial testing. The above results indicated that BS may be a potential drug candidate for the treatment of antibiotic-resistant bacterial infections and that scaffolds with enhanced antibacterial activity and mechanical properties may have potential applications in bone tissue engineering.
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Affiliation(s)
- Jinying Li
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
| | - Shi Hu
- State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China; (S.H.); (P.F.)
- Institute of Biomedical and Health Engineering, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Pei Feng
- State Key Laboratory of Precision Manufacturing for Extreme Service Performance, College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China; (S.H.); (P.F.)
| | - Yang Xia
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
- Changde First Chinese Medicine Hospital, Changde 415000, China
| | - Zihan Pei
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
| | - Jiaxuan Tian
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
| | - Kun Jiang
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
| | - Liang Liu
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
- State Key Laboratory of Traditional Chinese Medicine Syndrome, Guangdong Provincial Hospital of Chinese Medicine, Guangdong Provincial Academy of Chinese Medical Sciences, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Xiong Cai
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
| | - Ping Wu
- Institute of Innovation and Applied Research in Chinese Medicine, Hunan University of Chinese Medicine, Changsha 410208, China; (J.L.); (Y.X.); (Z.P.); (J.T.); (K.J.)
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Cao UMN, Zhang Y, Chen J, Sayson D, Pillai S, Tran SD. Microfluidic Organ-on-A-chip: A Guide to Biomaterial Choice and Fabrication. Int J Mol Sci 2023; 24:ijms24043232. [PMID: 36834645 PMCID: PMC9966054 DOI: 10.3390/ijms24043232] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 02/09/2023] Open
Abstract
Organ-on-A-chip (OoAC) devices are miniaturized, functional, in vitro constructs that aim to recapitulate the in vivo physiology of an organ using different cell types and extracellular matrix, while maintaining the chemical and mechanical properties of the surrounding microenvironments. From an end-point perspective, the success of a microfluidic OoAC relies mainly on the type of biomaterial and the fabrication strategy employed. Certain biomaterials, such as PDMS (polydimethylsiloxane), are preferred over others due to their ease of fabrication and proven success in modelling complex organ systems. However, the inherent nature of human microtissues to respond differently to surrounding stimulations has led to the combination of biomaterials ranging from simple PDMS chips to 3D-printed polymers coated with natural and synthetic materials, including hydrogels. In addition, recent advances in 3D printing and bioprinting techniques have led to the powerful combination of utilizing these materials to develop microfluidic OoAC devices. In this narrative review, we evaluate the different materials used to fabricate microfluidic OoAC devices while outlining their pros and cons in different organ systems. A note on combining the advances made in additive manufacturing (AM) techniques for the microfabrication of these complex systems is also discussed.
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Nahak BK, Mishra A, Preetam S, Tiwari A. Advances in Organ-on-a-Chip Materials and Devices. ACS APPLIED BIO MATERIALS 2022; 5:3576-3607. [PMID: 35839513 DOI: 10.1021/acsabm.2c00041] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The organ-on-a-chip (OoC) paves a way for biomedical applications ranging from preclinical to clinical translational precision. The current trends in the in vitro modeling is to reduce the complexity of human organ anatomy to the fundamental cellular microanatomy as an alternative of recreating the entire cell milieu that allows systematic analysis of medicinal absorption of compounds, metabolism, and mechanistic investigation. The OoC devices accurately represent human physiology in vitro; however, it is vital to choose the correct chip materials. The potential chip materials include inorganic, elastomeric, thermoplastic, natural, and hybrid materials. Despite the fact that polydimethylsiloxane is the most commonly utilized polymer for OoC and microphysiological systems, substitute materials have been continuously developed for its advanced applications. The evaluation of human physiological status can help to demonstrate using noninvasive OoC materials in real-time procedures. Therefore, this Review examines the materials used for fabricating OoC devices, the application-oriented pros and cons, possessions for device fabrication and biocompatibility, as well as their potential for downstream biochemical surface alteration and commercialization. The convergence of emerging approaches, such as advanced materials, artificial intelligence, machine learning, three-dimensional (3D) bioprinting, and genomics, have the potential to perform OoC technology at next generation. Thus, OoC technologies provide easy and precise methodologies in cost-effective clinical monitoring and treatment using standardized protocols, at even personalized levels. Because of the inherent utilization of the integrated materials, employing the OoC with biomedical approaches will be a promising methodology in the healthcare industry.
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Affiliation(s)
- Bishal Kumar Nahak
- Institute of Advanced Materials, IAAM, Gammalkilsvägen 18, Ulrika 59053, Sweden
| | - Anshuman Mishra
- Institute of Advanced Materials, IAAM, Gammalkilsvägen 18, Ulrika 59053, Sweden
| | - Subham Preetam
- Institute of Advanced Materials, IAAM, Gammalkilsvägen 18, Ulrika 59053, Sweden
| | - Ashutosh Tiwari
- Institute of Advanced Materials, IAAM, Gammalkilsvägen 18, Ulrika 59053, Sweden
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Wang X, Zhang Y, Shen P, Cheng Z, Chu C, Xue F, Bai J. Preparation of 4D printed peripheral vascular stent and its degradation behavior under fluid shear stress after deployment. Biomater Sci 2022; 10:2302-2314. [PMID: 35373795 DOI: 10.1039/d2bm00088a] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Shape memory stents are mild intervention devices for vascular diseases as compared to balloon-dilated ones; however, their degradation behavior under blood shear stress after deployment also deserves further attention. To understand the degradation behavior, we first prepared 4D printed poly(lactic acid) (PLA) stents via 3D printing technology and studied their failure behavior in a dynamic condition after self-expandable deployment. Mechanical property tests showed that the 4D printed stents had a compression force of 0.06-0.39 N mm-1 and a recovery ratio of 85.3-93.4%, respectively, which was verified to be wall thickness dependent. The stents were then implanted in simulated blood vessels with minimal microstructural damage at 60 °C followed by 8-week degradation tests. The results showed the microstructure damage caused by deployment could accelerate the degradation of stents faster than fluid shear stress. Furthermore, we conducted microstructural analysis and numerical simulation on the stent by finite element analysis (FEA) to explain the relationship between stent injury, vascular injury, and stent deployment temperature. A physical model derived from micro-morphologies on the degradation mechanism of PLA was also proposed. These results may provide new insights for the examination of the degradation behavior of 4D printed stents and minimize medical risk.
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Affiliation(s)
- Xianli Wang
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Yue Zhang
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Peiqi Shen
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Zhaojun Cheng
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Chenglin Chu
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Feng Xue
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
| | - Jing Bai
- School of Materials Science and Engineering, Southeast University, Jiangning, Nanjing 211189, Jiangsu, China. .,Jiangsu Key Laboratory for Advanced Metallic Materials, Jiangning, Nanjing 211189, Jiangsu, China
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Subretinal Implantation of Human Primary RPE Cells Cultured on Nanofibrous Membranes in Minipigs. Biomedicines 2022; 10:biomedicines10030669. [PMID: 35327471 PMCID: PMC8945676 DOI: 10.3390/biomedicines10030669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 02/19/2022] [Accepted: 02/22/2022] [Indexed: 11/28/2022] Open
Abstract
Purpose: The development of primary human retinal pigmented epithelium (hRPE) for clinical transplantation purposes on biodegradable scaffolds is indispensable. We hereby report the results of the subretinal implantation of hRPE cells on nanofibrous membranes in minipigs. Methods: The hRPEs were collected from human cadaver donor eyes and cultivated on ultrathin nanofibrous carriers prepared via the electrospinning of poly(L-lactide-co-DL-lactide) (PDLLA). “Libechov” minipigs (12–36 months old) were used in the study, supported by preoperative tacrolimus immunosuppressive therapy. The subretinal implantation of the hRPE-nanofibrous carrier was conducted using general anesthesia via a custom-made injector during standard three-port 23-gauge vitrectomy, followed by silicone oil endotamponade. The observational period lasted 1, 2, 6 and 8 weeks, and included in vivo optical coherence tomography (OCT) of the retina, as well as post mortem immunohistochemistry using the following antibodies: HNAA and STEM121 (human cell markers); Bestrophin and CRALBP (hRPE cell markers); peanut agglutining (PNA) (cone photoreceptor marker); PKCα (rod bipolar marker); Vimentin, GFAP (macroglial markers); and Iba1 (microglial marker). Results: The hRPEs assumed cobblestone morphology, persistent pigmentation and measurable trans-epithelial electrical resistance on the nanofibrous PDLLA carrier. The surgical delivery of the implants in the subretinal space of the immunosuppressed minipigs was successfully achieved and monitored by fundus imaging and OCT. The implanted hRPEs were positive for HNAA and STEM121 and were located between the minipig’s neuroretina and RPE layers at week 2 post-implantation, which was gradually attenuated until week 8. The neuroretina over the implants showed rosette or hypertrophic reaction at week 6. The implanted cells expressed the typical RPE marker bestrophin throughout the whole observation period, and a gradual diminishing of the CRALBP expression in the area of implantation at week 8 post-implantation was observed. The transplanted hRPEs appeared not to form a confluent layer and were less capable of keeping the inner and outer retinal segments intact. The cone photoreceptors adjacent to the implant scaffold were unchanged initially, but underwent a gradual change in structure after hRPE implantation; the retina above and below the implant appeared relatively healthy. The glial reaction of the transplanted and host retina showed Vimentin and GFAP positivity from week 1 onward. Microglial activation appeared in the retinal area of the transplant early after the surgery, which seemed to move into the transplant area over time. Conclusions: The differentiated hRPEs can serve as an alternative cell source for RPE replacement in animal studies. These cells can be cultivated on nanofibrous PDLLA and implanted subretinally into minipigs using standard 23-gauge vitrectomy and implantation injector. The hRPE-laden scaffolds demonstrated relatively good incorporation into the host retina over an eight-week observation period, with some indication of a gliotic scar formation, and a likely neuroinflammatory response in the transplanted area despite the use of immunosuppression.
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Tichotová L, Studenovska H, Petrovski G, Popelka Š, Nemesh Y, Sedláčková M, Drutovič S, Rohiwal S, Jendelová P, Erceg S, Brymová A, Artero‐Castro A, Lytvynchuk L, Straňák Z, Ellederová Z, Motlík J, Ardan T. Advantages of nanofibrous membranes for culturing of primary RPE cells compared to commercial scaffolds. Acta Ophthalmol 2021; 100:e1172-e1185. [PMID: 34687141 DOI: 10.1111/aos.15034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 09/22/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Dysfunction of the retinal pigment epithelium (RPE) causes numerous forms of retinal degeneration. RPE replacement is a modern option to save vision. We aimed to test the results of transplanting cultured RPEs on biocompatible membranes. METHODS We cultivated porcine primary RPE cells isolated from cadaver eyes from the slaughterhouse on two types of membranes: commercial polyester scaffolds Transwell (Corning Inc., Kenneburg, ME, USA) with 0.4 µm pore size and prepared Poly (L-lactide-co-DL-lactide) (PDLLA) nanofibrous membranes with an average pore size of 0.4 µm. RESULTS Five types of assays were used for the analysis: immunocytochemistry (ICC), phagocytosis assay, Western blotting, real-time qPCR (RT-qPCR) and electron microscopy. RT-qPCR demonstrated that RPEs cultured on nanofibrous membranes have higher expressions of BEST1 (bestrophin 1), RLBP1 (retinaldehyde-binding protein 1), RPE65 (retinal pigment epithelium-specific 65 kDa protein), PAX6 (transcription factor PAX6), SOX9 (transcription factor SOX9), DCT (dopachrome tautomerase) and MITF (microphthalmia-associated transcription factor). ICC of the RPEs cultured on nanofibrous membranes showed more intensive staining of markers such as BEST1, MCT1 (monocarboxylate transporter 1), Na+ /K+ ATPase, RPE65 and acetylated tubulin in comparison with commercial ones. Additionally, the absence of α-SMA proved the stability of the RPE polarization state and the absence of epithelial-to-mesenchymal transition. RPE possessed high phagocytic activity. Electron microscopy of both membranes confirmed a confluent layer of RPE cells and their genuine morphological structure, which was comparable to native RPEs. CONCLUSIONS Retinal pigment epitheliums cultured on polylactide nanofibrous membranes improved the final quality of the cell product by having better maturation and long-term survival of the RPE monolayer compared to those cultured on commercial polyester scaffolds. PDLLA-cultured RPEs are a plausible source for the replacement of non-functioning RPEs during cell therapy.
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Affiliation(s)
- Lucie Tichotová
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
- Department of Cell Biology Faculty of Science Charles University Prague Czech Republic
| | - Hana Studenovska
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Prague Czech Republic
| | - Goran Petrovski
- Center for Eye Research Department of Ophthalmology Oslo University Hospital and Institute for Clinical Medicine University of Oslo Oslo Norway
| | - Štěpán Popelka
- Institute of Macromolecular Chemistry Academy of Sciences of the Czech Republic Prague Czech Republic
| | - Yaroslav Nemesh
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
- Department of Cell Biology Faculty of Science Charles University Prague Czech Republic
| | - Miroslava Sedláčková
- Department of Histology and Embryology Faculty of Medicine Masaryk University Brno Czech Republic
| | - Saskia Drutovič
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
| | - Sonali Rohiwal
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
| | - Pavla Jendelová
- Institute of Experimental Medicine Academy of Sciences of the Czech Republic Prague Czech Republic
| | - Slaven Erceg
- Institute of Experimental Medicine Academy of Sciences of the Czech Republic Prague Czech Republic
- Stem Cell Therapies in Neurodegenerative Diseases Lab Research Center ‘Principe Felipe’ Valencia Spain
| | - Anna Brymová
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
- Department of Cell Biology Faculty of Science Charles University Prague Czech Republic
| | - Ana Artero‐Castro
- Stem Cell Therapies in Neurodegenerative Diseases Lab Research Center ‘Principe Felipe’ Valencia Spain
| | - Lyubomyr Lytvynchuk
- Department of Ophthalmology Justus‐Liebig‐University Giessen University Hospital Giessen and Marburg Giessen Germany
| | - Zbyněk Straňák
- Ophthalmology Department of 3rd Faculty of Medicine Charles University and University Hospital Kralovske Vinohrady Prague Czech Republic
- Third Faculty of Medicine Charles University Prague Czech Republic
| | - Zdeňka Ellederová
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
| | - Jan Motlík
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
| | - Taras Ardan
- Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic Libechov Czech Republic
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Plyusnin A, He J, Elschner C, Nakamura M, Kulkova J, Spickenheuer A, Scheffler C, Lassila LVJ, Moritz N. A Polymer for Application as a Matrix Phase in a Concept of In Situ Curable Bioresorbable Bioactive Load-Bearing Continuous Fiber Reinforced Composite Fracture Fixation Plates. Molecules 2021; 26:molecules26051256. [PMID: 33652632 PMCID: PMC7956420 DOI: 10.3390/molecules26051256] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 12/04/2022] Open
Abstract
The use of bioresorbable fracture fixation plates made of aliphatic polyesters have good potential due to good biocompatibility, reduced risk of stress-shielding, and eliminated need for plate removal. However, polyesters are ductile, and their handling properties are limited. We suggested an alternative, PLAMA (PolyLActide functionalized with diMethAcrylate), for the use as the matrix phase for the novel concept of the in situ curable bioresorbable load-bearing composite plate to reduce the limitations of conventional polyesters. The purpose was to obtain a preliminary understanding of the chemical and physical properties and the biological safety of PLAMA from the prospective of the novel concept. Modifications with different molecular masses (PLAMA-500 and PLAMA-1000) were synthesized. The efficiency of curing was assessed by the degree of convergence (DC). The mechanical properties were obtained by tensile test and thermomechanical analysis. The bioresorbability was investigated by immersion in simulated body fluid. The biocompatibility was studied in cell morphology and viability tests. PLAMA-500 showed better DC and mechanical properties, and slower bioresorbability than PLAMA-1000. Both did not prevent proliferation and normal morphological development of cells. We concluded that PLAMA-500 has potential for the use as the matrix material for bioresorbable load-bearing composite fracture fixation plates.
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Affiliation(s)
- Artem Plyusnin
- Turku Clinical Biomaterials Centre—TCBC, Department of Biomaterials Science, Faculty of Medicine, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland; (A.P.); (L.V.J.L.); (N.M.)
| | - Jingwei He
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, China;
| | - Cindy Elschner
- Leibniz-Institut für Polymerforschung Dresden e. V., D-01005 Dresden, Germany; (C.E.); (A.S.); (C.S.)
| | - Miho Nakamura
- Medicity Research Laboratory, Faculty of Medicine, University of Turku, FI-20014 Turku, Finland;
| | - Julia Kulkova
- Turku Clinical Biomaterials Centre—TCBC, Department of Biomaterials Science, Faculty of Medicine, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland; (A.P.); (L.V.J.L.); (N.M.)
- Correspondence: ; Tel.: +358-44-974-91-83
| | - Axel Spickenheuer
- Leibniz-Institut für Polymerforschung Dresden e. V., D-01005 Dresden, Germany; (C.E.); (A.S.); (C.S.)
| | - Christina Scheffler
- Leibniz-Institut für Polymerforschung Dresden e. V., D-01005 Dresden, Germany; (C.E.); (A.S.); (C.S.)
| | - Lippo V. J. Lassila
- Turku Clinical Biomaterials Centre—TCBC, Department of Biomaterials Science, Faculty of Medicine, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland; (A.P.); (L.V.J.L.); (N.M.)
| | - Niko Moritz
- Turku Clinical Biomaterials Centre—TCBC, Department of Biomaterials Science, Faculty of Medicine, Institute of Dentistry, University of Turku, FI-20014 Turku, Finland; (A.P.); (L.V.J.L.); (N.M.)
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Sohrabi M, Eftekhari Yekta B, Rezaie H, Naimi-Jamal MR, Kumar A, Cochis A, Miola M, Rimondini L. Enhancing Mechanical Properties and Biological Performances of Injectable Bioactive Glass by Gelatin and Chitosan for Bone Small Defect Repair. Biomedicines 2020; 8:biomedicines8120616. [PMID: 33334044 PMCID: PMC7765522 DOI: 10.3390/biomedicines8120616] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 12/07/2020] [Accepted: 12/13/2020] [Indexed: 12/19/2022] Open
Abstract
Bioactive glass (BG) represents a promising biomaterial for bone healing; here injectable BG pastes biological properties were improved by the addition of gelatin or chitosan, as well as mechanical resistance was enhanced by adding 10 or 20 wt% 3-Glycidyloxypropyl trimethoxysilane (GPTMS) cross-linker. Composite pastes exhibited bioactivity as apatite formation was observed by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) after 14 days immersion in simulated body fluid (SBF); moreover, polymers did not enhance degradability as weight loss was >10% after 30 days in physiological conditions. BG-gelatin-20 wt% GPTMS composites demonstrated the highest compressive strength (4.8 ± 0.5 MPa) in comparison with the bulk control paste made of 100% BG in water (1.9 ± 0.1 MPa). Cytocompatibility was demonstrated towards human mesenchymal stem cells (hMSC), osteoblasts progenitors, and endothelial cells. The presence of 20 wt% GPTMS conferred antibacterial properties thus inhibiting the joint pathogens Staphylococcus aureus and Staphylococcus epidermidis infection. Finally, hMSC osteogenesis was successfully supported in a 3D model as demonstrated by alkaline phosphatase release and osteogenic genes expression.
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Affiliation(s)
- Mehri Sohrabi
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran 1684613114, Iran; (M.S.); (H.R.)
| | - Bijan Eftekhari Yekta
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran 1684613114, Iran; (M.S.); (H.R.)
- Correspondence: (B.E.Y.); (L.R.)
| | - Hamidreza Rezaie
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran 1684613114, Iran; (M.S.); (H.R.)
| | - Mohammad Reza Naimi-Jamal
- Department of Chemistry, Research Laboratory of Green Organic Synthesis and Polymers, Iran University of Science and Technology, Tehran 1684613114, Iran;
| | - Ajay Kumar
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases–CAAD, University of Piemonte Orientale UPO, 28100 Novara, Italy; (A.K.); (A.C.)
| | - Andrea Cochis
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases–CAAD, University of Piemonte Orientale UPO, 28100 Novara, Italy; (A.K.); (A.C.)
| | - Marta Miola
- Institute of Materials Engineering and Physics, Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy;
| | - Lia Rimondini
- Department of Health Sciences, Center for Translational Research on Autoimmune and Allergic Diseases–CAAD, University of Piemonte Orientale UPO, 28100 Novara, Italy; (A.K.); (A.C.)
- Correspondence: (B.E.Y.); (L.R.)
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10
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Ekinci A, Gleadall A, Johnson AA, Li L, Han X. Mechanical and hydrolytic properties of thin polylactic acid films by fused filament fabrication. J Mech Behav Biomed Mater 2020; 114:104217. [PMID: 33246876 DOI: 10.1016/j.jmbbm.2020.104217] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 10/26/2020] [Accepted: 11/15/2020] [Indexed: 01/14/2023]
Abstract
Thin polymeric films are widely used as medical applications such as cell culture, stent, drug delivery and mechanical fixation. One of the most commonly used materials is polylactic acid (PLA) - a material, which is non-toxic, biodegradable and biocompatible. Fused filament fabrication (FFF) is a preferable additive manufacturing technique to manufacture polymers, where PLA is one of the most common materials. FFF is a promising technique for customised biomedical applications due to its relatively low cost and geometrical flexibility where biomedical applications are patient tailored. This study is the first to consider FFF monolayered thin films of PLA in terms of mechanical and hydrolytic properties at 37 °C in vitro degradation. Throughout degradation, the reduction in mechanical properties was examined by analysing molecular weight and thermal properties. FFF monolayered PLA underwent autocatalytic bulk degradation with no proof of significant mass loss. Young's modulus, ultimate tensile strength and molecular weight reduced by approximately 60%, 86%, and 80% after 280 days, respectively, while the degree of crystallinity increased by 143% in comparison to benchmark thin films at day 0. It was found that the decrease in mechanical properties was more sensitive to the increase in crystallinity in the early stage of the degradation, while the molecular weight was more dominant in the late stage of the degradation. This study provides practical information in terms of mechanical properties to support medical device designers in a range of potential end-use biomedical applications to achieve safe functional products over the required degradation lifetime.
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Affiliation(s)
- Alper Ekinci
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | - Andy Gleadall
- Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | - Andrew A Johnson
- School of Design & Creative Arts, Loughborough University, Loughborough, LE11 3TU, UK
| | - Ling Li
- State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, 410082, China
| | - Xiaoxiao Han
- State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, 410082, China.
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11
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Wu P, Wang Y, Sun D, Luo Y, Chen C, Tang Z, Liao Y, Cao X, Xu L, Cheng C, Liu W, Liang X. In-vivo histocompatibility and osteogenic potential of biodegradable PLDLA composites containing silica-based bioactive glass fiber. J Biomater Appl 2020; 35:59-71. [PMID: 32233716 DOI: 10.1177/0885328220911598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The purpose of this two-year study was to evaluate the histocompatibility and osteogenic properties of a composite material consisting of poly(l-co-d,l lactide) (PLDLA) and silica-based bioactive glass fibers in vivo. PLDLA and PLDLA/silica-based bioactive glass fibers pins were implanted into the erector spinae muscles and femurs of beagles. Muscle and bone tissue samples were harvested 6, 12, 16, 26, 52, 78, and 104 weeks after implantation. Histology analysis was used to assess the histocompatibility, angiogenesis, and bone-implant contact. Micro-computed tomography was used to evaluate bone formation around the pins. Immunohistochemistry and western blotting revealed the expression level of the osteogenesis-related proteins. Addition of bioactive glass was demonstrated to possess better histocompatibility and reduce the inflammatory reactions in vivo. Moreover, PLDLA/silica-based bioactive glass fibers pins were demonstrated to promote angiogenesis and increase osteogenesis-related proteins expression, and thus played a positive role in osteogenesis and osseointegration after implantation. Our findings indicated that a composite of PLDLA and silica-based bioactive glass fiber is a promising biodegradable material for clinical use.
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Affiliation(s)
- Peng Wu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yue Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dongyuan Sun
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Youran Luo
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Cheng Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ziqing Tang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yunmao Liao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, China
| | - Xiaoyan Cao
- School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China
| | - Lijun Xu
- School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, China.,Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beijing, China
| | - Chengkung Cheng
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, China.,School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Weiqing Liu
- School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Xing Liang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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12
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Wang Y, Wu P, Sun D, Luo Y, Chen C, Tang Z, Liao Y, Cao X, Cheng C, Liu W, Liang X. Mechanical and degradative properties of PLDLA biodegradable pins with bioactive glass fibers in a beagle model. ACTA ACUST UNITED AC 2020; 15:035010. [PMID: 32066131 DOI: 10.1088/1748-605x/ab772d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The present study aimed to evaluate the mechanical and degradative properties of poly(L-co-D,L-lactic acid)/silicate bioactive glass fibers (PLDLA/SGFs) composite pins in vivo. Both PLDLA and PLDLA/SGFs pins were inserted into the erector spinae muscles and femurs of beagle dogs and were harvested 6, 12, 16, 26, 52, 78, and 104 weeks after insertion. Bone formation around the pins was evaluated by micro-computed tomography. Mechanical properties were measured by the shear strength test. Thermogravimetric analysis, differential scanning calorimetry, and gel permeation chromatography were used to assess the degradation of these materials. The surface and cross-sectional morphology of both pins were observed using a scanning electron microscope. The experimental data demonstrated that PLDLA/SGFs pins can support new bone formation due to the influence of bioactive glass fibers. PLDLA/SGFs composite pins had higher initial shear strength and were relatively stable for at least 26 weeks. The addition of bioactive glass fibers accelerated the degradation rate of the composite pins. Thus, PLDLA/SGFs composite pins have promising potential for bone fixation applications.
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Affiliation(s)
- Yue Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, People's Republic of China
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13
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Cao XY, Chen C, Tian N, Dong X, Liang X, Xu LJ, Cheng CK. Long-term study on the osteogenetic capability and mechanical behavior of a new resorbable biocomposite anchor in a canine model. J Orthop Translat 2020; 21:81-90. [PMID: 32110507 PMCID: PMC7033359 DOI: 10.1016/j.jot.2019.12.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 12/16/2019] [Accepted: 12/18/2019] [Indexed: 02/08/2023] Open
Abstract
Background Biodegradable suture anchors are commonly used for repairing torn rotator cuffs, but these biodegradable materials still suffer from low mechanical strength, poor osteointegration, and the generation of acidic degradation byproducts. Method The purpose of this study was to evaluate the long-term mechanical behavior and osteogenetic capabilities of a biocomposite anchor injection molded with 30% β-tricalcium phosphate microparticles blended with 70% poly (L-lactide-co-glycolide) (85/15). This study investigated in vitro degradation and in vivo bone formation in a canine model. The initial mechanical behavior, mechanical strength retention with degradation time, and degradation features were investigated. Results The results showed that the biocomposite anchor had sufficient initial mechanical stability confirmed by comparing the initial shear load on the anchor with the minimum shear load borne by an ankle fracture fixation screw, which is considered a worst-case implantation site for mechanical loading. The maximum shear load retention of the biocomposite anchor was 83% at 12 weeks, which is desirable, as it aligns with the rate of bone healing. The β-tricalcium phosphate fillers were evenly dispersed in the polymeric matrix and acted to slow the degradation rate and improve the mechanical strength of the anchor. The interface characteristics between the β-tricalcium phosphate particles and the polymeric matrix changed the degradation behavior of the biocomposite. Phosphate buffer saline was shown to diffuse through the interface into the biocomposite to inhibit the core accelerated degradation rate. In vivo, the addition of β-tricalcium phosphate induced new bone formation. The biocomposite material developed in this study demonstrated improved osteogenesis in comparison to a plain poly (L-lactide-co-glycolide) material. Neither anchor produced adverse tissue reactions, indicating that the biocomposite had favorable biocompatibility following long-term implantation. Conclusion In summary, the new biocomposite anchor presented in this study had favorable osteogenetic capability, mechanical property, and controlled degradation rate for bone fixation. Translational potential of this article The new biocomposite anchor had sufficient initial and long-term fixation stability and bone formation capability in the canine model. It is indicated that the new biocomposite anchor has a potential for orthopedic application.
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Affiliation(s)
- Xiao-Yan Cao
- School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, 100191, China.,School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China
| | - Cheng Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Na Tian
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. LTD, Beijing, 100094, China
| | - Xiang Dong
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. LTD, Beijing, 100094, China
| | - Xing Liang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Li-Jun Xu
- School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing, 100191, China.,Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, Beijing, 100191, China
| | - Cheng-Kung Cheng
- School of Biological Science and Medical Engineering, Beihang University, Beijing, 100191, China.,Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing, 100191, China
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14
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Cai H, Meng J, Li X, Xue F, Chu C, Guo C, Bai J. In vitro degradation behavior of Mg wire/poly(lactic acid) composite rods prepared by hot pressing and hot drawing. Acta Biomater 2019; 98:125-141. [PMID: 31146034 DOI: 10.1016/j.actbio.2019.05.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 05/10/2019] [Accepted: 05/23/2019] [Indexed: 12/31/2022]
Abstract
In this study, we prepared Mg wire/poly(lactic acid) composite rods by hot pressing (HP) and hot drawing (HD) processes, which show desirable application potential as a biodegradable implant in orthopedics. The influences of the volume content of Mg wires and processing steps on the degradation behavior of composite rods as well as the mutual influence between Mg and poly(lactic acid) (PLA) during degradation were investigated. During degradation, the improved interface bonding between Mg and PLA by micro-arc oxidation can effectively inhibit the diffusion of the medium from the ends to the central part, supported by XR-CT results, which show the degradation cracks in PLA initiated and propagated along the radial direction of the rod rather than the axial direction. When compared with the hot pressed rod, the three passes hot drawn rod had lower degradation rate and better strength retention during long-time immersion. This is ascribed to the higher crystallinity of the PLA matrix by HD. For both hot pressed and hot drawn rods, more Mg content of the wires will result in an increase in the degradation rate of PLA due to alkaline catalytic hydrolysis. Therefore, we can not only predict the degradation period by the present degradation mathematical model but also further control degradation rate by adjusting processing steps and wire volume content. This will be helpful for future material design and indication selection. STATEMENT OF SIGNIFICANCE: We investigated the influence of interface microstructure, self-reinforced PLA matrix, and wire volume content on the degradation behavior and clarified the differences in the degradation mechanism of composite rods. The 3D morphology of cracks in composite rods enlightened us a clear understanding about the emergence and evolution of cracks, which revealed the reason for the failure of composite rods. The degradation model can be used to predict the degradation period and provide valuable information for their future application.
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15
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Cao XY, Tian N, Dong X, Cheng CK. Polylactide Composite Pins Reinforced with Bioresorbable Continuous Glass Fibers Demonstrating Bone-like Apatite Formation and Spiral Delamination Degradation. Polymers (Basel) 2019; 11:E812. [PMID: 31064109 PMCID: PMC6572480 DOI: 10.3390/polym11050812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 04/30/2019] [Accepted: 04/30/2019] [Indexed: 11/17/2022] Open
Abstract
The emergence of polylactide composites reinforced with bioresorbable silicate glass fibers has allowed for the long-term success of biodegradable polymers in load-bearing orthopedic applications. However, few studies have reported on the degradation behavior and bioactivity of such biocomposites. The aim of this work was to investigate the degradation behavior and in vitro bioactivity of a novel biocomposite pin composed of bioresorbable continuous glass fibers and poly-L-D-lactide in simulated body fluid for 78 weeks. As the materials degraded, periodic spiral delamination formed microtubes and funnel-shaped structures in the biocomposite pins. It was speculated that the direction of degradation, from both ends towards the middle of the fibers and from the surface through to the bulk of the polymer matrix, could facilitate bone healing. Following immersion in simulated body fluid, a bone-like apatite layer formed on the biocomposite pins which had a similar composition and structure to natural bone. The sheet- and needle-like apatite nanostructure was doped with sodium, magnesium, and carbonate ions, which acted to lower the Ca/P atomic ratio to less than the stoichiometric apatite and presented a calcium-deficient apatite with low crystallinity. These findings demonstrated the bioactivity of the new biocomposite pins in vitro and their excellent potential for load-bearing applications.
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Affiliation(s)
- Xiao-Yan Cao
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Na Tian
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. LTD, Beijing 100094, China.
| | - Xiang Dong
- Beijing Engineering Laboratory of Functional Medical Materials and Devices, Beijing Naton Technology Group Co. LTD, Beijing 100094, China.
| | - Cheng-Kung Cheng
- School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
- Beijing Advanced Innovation Center for Biomedical Engineering, Beihang University, Beijing 100083, China.
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16
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Wu P, Hu S, Liang Q, Guo W, Xia Y, Shuai C, Li Y. A polymer scaffold with drug-sustained release and antibacterial activity. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1581194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ping Wu
- Department of Pharmaceutical Engineering, School of Chemical Engineering, Xiangtan University, Xiangtan, China
- Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, China
| | - Shi Hu
- Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, China
| | - Qin Liang
- Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, China
| | - Wang Guo
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
| | - Yang Xia
- Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education, Xiangtan University, Xiangtan, China
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, College of Mechanical and Electrical Engineering, Central South University, Changsha, China
- Jiangxi University of Science and Technology, Ganzhou, China
| | - Yongmin Li
- Hunan Key Laboratory of Chinese Medicine Oncology, Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha, China
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17
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Rizwan M, Hamdi M, Basirun WJ. Bioglass® 45S5-based composites for bone tissue engineering and functional applications. J Biomed Mater Res A 2017; 105:3197-3223. [DOI: 10.1002/jbm.a.36156] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/02/2017] [Accepted: 07/03/2017] [Indexed: 12/13/2022]
Affiliation(s)
- M. Rizwan
- Department of Mechanical Engineering; Faculty of Engineering, University of Malaya; Kuala Lumpur 50603 Malaysia
- Department of Metallurgical Engineering; Faculty of Chemical and Process Engineering, NED University of Engineering and Technology; Karachi 75270 Pakistan
| | - M. Hamdi
- Center of Advanced Manufacturing and Material Processing, University of Malaya; Kuala Lumpur 50603 Malaysia
| | - W. J. Basirun
- Department of Chemistry; Faculty of Science, University of Malaya; Kuala Lumpur 50603 Malaysia
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18
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Shuai C, Shuai C, Wu P, Yuan F, Feng P, Yang Y, Guo W, Fan X, Su T, Peng S, Gao C. Characterization and Bioactivity Evaluation of (Polyetheretherketone/Polyglycolicacid)-Hydroyapatite Scaffolds for Tissue Regeneration. MATERIALS 2016; 9:ma9110934. [PMID: 28774058 PMCID: PMC5457255 DOI: 10.3390/ma9110934] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 11/03/2016] [Accepted: 11/14/2016] [Indexed: 01/13/2023]
Abstract
Bioactivity and biocompatibility are crucial for tissue engineering scaffolds. In this study, hydroxyapatite (HAP) was incorporated into polyetheretherketone/polyglycolicacid (PEEK/PGA) hybrid to improve its biological properties, and the composite scaffolds were developed via selective laser sintering (SLS). The effects of HAP on physical and chemical properties of the composite scaffolds were investigated. The results demonstrated that HAP particles were distributed evenly in PEEK/PGA matrix when its content was no more than 10 wt %. Furthermore, the apatite-forming ability became better with increasing HAP content after immersing in simulated body fluid (SBF). Meanwhile, the composite scaffolds presented a greater degree of cell attachment and proliferation than PEEK/PGA scaffolds. These results highlighted the potential of (PEEK/PGA)-HAP scaffolds for tissue regeneration.
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Affiliation(s)
- Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Chenying Shuai
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
| | - Ping Wu
- College of Chemistry, Xiangtan University, Xiangtan 411105, China.
| | - Fulai Yuan
- Hunan Farsoon High-Technology Co. Ltd., Changsha 410205, China.
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
| | - Youwen Yang
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
- State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Wang Guo
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
| | - Xiaohan Fan
- Health Management Center, Xiangya Hospital, Central South University, Changsha 410008, China.
| | - Ting Su
- Health Management Center, Xiangya Hospital, Central South University, Changsha 410008, China.
| | - Shuping Peng
- The Key Laboratory of Carcinogenesis of the Chinese Ministry of Health, Xiangya Hospital, Central South University, Changsha 410008, China.
- The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education, Cancer Research Institute, Central South University, Changsha 410078, China.
- Hunan Key Laboratory of Nonresolving Inflammation and Cancer, Disease Genome Research Center, The Third Xiangya Hospital, Central South University, Changsha 410078, China.
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, the State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China.
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19
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Shuai C, Wu P, Zhong Y, Feng P, Gao C, Huang W, Zhou Z, Chen L, Shuai C. Polyetheretherketone/poly (glycolic acid) blend scaffolds with biodegradable properties. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:1434-46. [DOI: 10.1080/09205063.2016.1210420] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Chenying Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, China
| | - Ping Wu
- College of Chemistry, Xiangtan University, Xiangtan, P.R. China
| | - Yancheng Zhong
- The Key Laboratory of Carcinogenesis and Cancer Invasion of The Chinese Ministry of Education, Xiangya Hospital, Central South University, Changsha, China
- The Key Laboratory of Carcinogenesis of The Chinese Ministry of Health and Cancer Research Institute, Central South University, Changsha, China
| | - Pei Feng
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, China
| | - Chengde Gao
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, China
| | - Wei Huang
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, China
| | - Zhiyang Zhou
- Hunan Farsoon High-Technology Co. Ltd, Changsha, China
| | - Li Chen
- Hunan Farsoon High-Technology Co. Ltd, Changsha, China
| | - Cijun Shuai
- State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha, China
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20
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Upson SJ, Partridge SW, Tcacencu I, Fulton DA, Corbett I, German MJ, Dalgarno KW. Development of a methacrylate-terminated PLGA copolymer for potential use in craniomaxillofacial fracture plates. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:470-7. [PMID: 27612737 DOI: 10.1016/j.msec.2016.06.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/28/2016] [Accepted: 06/05/2016] [Indexed: 11/17/2022]
Abstract
We synthesised methacrylate-terminated PLGA (HT-PLGA, 85:15 LA:GA, 169kDa), for potential use as an adhesively attached craniomaxillofacial fracture fixation plate. The in vitro degradation of molecular weight, pH and flexural modulus were measured over 6weeks storage in PBS at 37°C, with commercially available high (225kDa, H-PLGA) and low (116kDa, L-PLGA) molecular weight 85:15 PLGAs used as comparators. Molecular weights of the materials reduced over 6weeks, HT-PLGA by 48%, H-PLGA by 23% and L-PLGA by 81%. HT-PLGA and H-PLGA exhibited a near constant pH (7.35) and had average flexural moduli in excess of 6GPa when produced, similar to that of the mandible. After 1week storage both exhibited a significant reduction in average modulus, however, from weeks 1-6 no further significant changes were observed, the average modulus never dropped significantly below 5.5GPa. In contrast, the L-PLGA caused a pH drop to below 7.3 by week 6 and an average modulus drop to 0.6 from an initial 4.6GPa. Cell culture using rat bone marrow stromal cells, revealed all materials were cytocompatible and exhibited no osteogenic potential. We conclude that our functionalised PLGA retains mechanical properties which are suitable for use in craniofacial fixation plates.
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Affiliation(s)
- Sarah J Upson
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Simon W Partridge
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Ion Tcacencu
- Department of Dental Medicine, Karolinska Institutet, 14104 Huddinge, Sweden
| | - David A Fulton
- Chemical Nanoscience Laboratory, School of Chemistry, Newcastle University, Newcastle Upon Tyne, United Kingdom
| | - Ian Corbett
- Centre for Oral Health Research, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Matthew J German
- Centre for Oral Health Research, School of Dental Sciences, Newcastle University, Newcastle upon Tyne, United Kingdom.
| | - Kenneth W Dalgarno
- School of Mechanical and Systems Engineering, Newcastle University, Newcastle Upon Tyne, United Kingdom
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21
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Cifuentes SC, Gavilán R, Lieblich M, Benavente R, González-Carrasco JL. In vitro degradation of biodegradable polylactic acid/magnesium composites: Relevance of Mg particle shape. Acta Biomater 2016; 32:348-357. [PMID: 26747758 DOI: 10.1016/j.actbio.2015.12.037] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 11/03/2015] [Accepted: 12/30/2015] [Indexed: 11/17/2022]
Abstract
Absorbable medical devices must be developed in order to have an appropriate degradation rate in agreement with the healing rate of bone in the implantation site. In this work, biodegradable composites formed by a polylactic acid matrix reinforced with 10%wt. magnesium microparticles were processed and their in vitro degradation investigated during 28 days. A joint analysis of the amount of H2 released, the changes in pH in buffered (PBS) and non-buffered media (distilled water), the variations in mass, microstructure and the mechanical performance of the specimens was developed. The main aim was to elucidate the relevance of Mg particles shape on tailoring the degradation kinetics of these novel composites. The results show that the shape of the Mg reinforcing particles plays a crucial role in the degradation rate of PLA/Mg composites, with spherical particles promoting a lower degradation rate than irregular particles. This fact is only partially due to the smaller surface area to volume ratio of the spherical particles. Irregular particles promote a faster formation of cracks and, therefore, an increasingly faster degradation of the polymeric matrix. In every case, the amount of H2 released by the composites was well below that released by monolithic Mg. The pH of PBS during degradation remained always within 7.2 and 7.4. PLA/Mg reinforced with spherical particles retains more than 90% of its mechanical properties after 7 days of immersion and more than 60% after 28 days. STATEMENT OF SIGNIFICANCE The increasing demand for temporary orthopaedic implants is the driving force to seek new strategies to decrease costs and simultaneously improve patients comfort as well as simplify surgical procedures. Resorbable medical devices must be developed in order to have an appropriate degradation rate in agreement with the healing rate of bone. We are presenting for the first time results of the degradation kinetics of a new material based on polylactic acid reinforced with 10%wt. Mg microparticles. This work analyzes the relevance of Mg particle shape (irregular and spherical) on tailoring the degradation behaviour of these composites. Conclusions withdrawn from this study help to customize bioabsorbable materials in order to meet the requirements for a specific application and patient.
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Affiliation(s)
- S C Cifuentes
- Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain.
| | - R Gavilán
- Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain
| | - M Lieblich
- Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain.
| | - R Benavente
- Instituto de Ciencia y Tecnología de Polímeros ICTP-CSIC, Juan de la Cierva 3, 28006 Madrid, Spain.
| | - J L González-Carrasco
- Centro Nacional de Investigaciones Metalúrgicas, CENIM-CSIC, Avda. Gregorio del Amo 8, 28040 Madrid, Spain; Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina CIBER-BBN, Spain.
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22
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Haaparanta AM, Uppstu P, Hannula M, Ellä V, Rosling A, Kellomäki M. Improved dimensional stability with bioactive glass fibre skeleton in poly(lactide-co-glycolide) porous scaffolds for tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:457-66. [PMID: 26249615 DOI: 10.1016/j.msec.2015.07.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 06/01/2015] [Accepted: 07/09/2015] [Indexed: 11/17/2022]
Abstract
Bone tissue engineering requires highly porous three-dimensional (3D) scaffolds with preferable osteoconductive properties, controlled degradation, and good dimensional stability. In this study, highly porous 3D poly(d,l-lactide-co-glycolide) (PLGA) - bioactive glass (BG) composites (PLGA/BG) were manufactured by combining highly porous 3D fibrous BG mesh skeleton with porous PLGA in a freeze-drying process. The 3D structure of the scaffolds was investigated as well as in vitro hydrolytic degradation for 10weeks. The effect of BG on the dimensional stability, scaffold composition, pore structure, and degradation behaviour of the scaffolds was evaluated. The composites showed superior pore structure as the BG fibres inhibited shrinkage of the scaffolds. The BG was also shown to buffer the acidic degradation products of PLGA. These results demonstrate the potential of these PLGA/BG composites for bone tissue engineering, but the ability of this kind of PLGA/BG composites to promote bone regeneration will be studied in forthcoming in vivo studies.
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Affiliation(s)
- Anne-Marie Haaparanta
- Department of Electronics and Communications Engineering, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland; BioMediTech, Institute of Biosciences and Medical Technology, Biokatu 10, 33520 Tampere, Finland.
| | - Peter Uppstu
- Laboratory of Polymer Technology, Centre of Excellence in Functional Materials at Biological Interfaces, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo, Finland.
| | - Markus Hannula
- Department of Electronics and Communications Engineering, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland; BioMediTech, Institute of Biosciences and Medical Technology, Biokatu 10, 33520 Tampere, Finland.
| | - Ville Ellä
- Department of Electronics and Communications Engineering, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland; BioMediTech, Institute of Biosciences and Medical Technology, Biokatu 10, 33520 Tampere, Finland.
| | - Ari Rosling
- Laboratory of Polymer Technology, Centre of Excellence in Functional Materials at Biological Interfaces, Åbo Akademi University, Biskopsgatan 8, 20500 Åbo, Finland.
| | - Minna Kellomäki
- Department of Electronics and Communications Engineering, Tampere University of Technology, Korkeakoulunkatu 3, 33720 Tampere, Finland; BioMediTech, Institute of Biosciences and Medical Technology, Biokatu 10, 33520 Tampere, Finland.
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23
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Vallittu PK, Närhi TO, Hupa L. Fiber glass–bioactive glass composite for bone replacing and bone anchoring implants. Dent Mater 2015; 31:371-81. [DOI: 10.1016/j.dental.2015.01.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 11/30/2014] [Accepted: 01/07/2015] [Indexed: 10/24/2022]
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24
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Maturana LG, Pierucci A, Simões GF, Oliveira ALRD, Duek EADR. Estudo das células Neuro2A sobre os biomateriais PCL e PLLA. POLIMEROS 2014. [DOI: 10.1590/0104-1428.1555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Os biomateriais poli L-ácido lático (PLLA) e o poli caprolactona (PCL) são os polímeros mais estudadas na área dos materiais bioreabsorvíveis. Dentre as suas principais características que contribuem para a interação celular, temos a especificidade química da superfície, elétrica, hidrofobicidade e topografia. Ainda, observa-se o tempo de degradação, porosidade, biocompatibilidade com o tecido biológico, bem como, a confecção com as mais variadas formas e dimensões. Já a prática da cultura celular, tem como objetivo estudar a adesão, migração, diferenciação e a proliferação celular utilizando-se um determinado material ou substância. Contudo, poucos trabalhos utilizando os biomateriais ora supracitados e a aplicação em células neuro2A foram realizados. Sabe-se que este tipo celular é derivado de células embrionárias da crista neural, as quais originam em neurônios simpáticos e apresentam como característica a imortalidade, portanto, são excelentes modelos em ensaios in vitro. Nesse sentido, o presente estudo avalia a adesão e a proliferação desta linhagem celular sobre os biopolímeros poli caprolactona (PCL) e poli L-ácido lático (PLLA).
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Affiliation(s)
| | - Amauri Pierucci
- Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM
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25
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Liu X, Grant DM, Palmer G, Parsons AJ, Rudd CD, Ahmed I. Magnesium coated phosphate glass fibers for unidirectional reinforcement of polycaprolactone composites. J Biomed Mater Res B Appl Biomater 2014; 103:1424-32. [DOI: 10.1002/jbm.b.33324] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Revised: 09/05/2014] [Accepted: 10/26/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaoling Liu
- Division of Materials; Mechanics and Structures; Faculty of Engineering; University of Nottingham; Nottingham NG7 2RD UK
| | - David M. Grant
- Division of Materials; Mechanics and Structures; Faculty of Engineering; University of Nottingham; Nottingham NG7 2RD UK
| | - Graham Palmer
- Biomaterials and Tissue Engineering; Eastman Dental Institute; University College London; 256 Gray's Inn Road London WC1X 8LD UK
| | - Andrew J. Parsons
- Division of Materials; Mechanics and Structures; Faculty of Engineering; University of Nottingham; Nottingham NG7 2RD UK
| | - Chris D. Rudd
- Division of Materials; Mechanics and Structures; Faculty of Engineering; University of Nottingham; Nottingham NG7 2RD UK
| | - Ifty Ahmed
- Division of Materials; Mechanics and Structures; Faculty of Engineering; University of Nottingham; Nottingham NG7 2RD UK
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26
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Liu X, Hasan MS, Grant DM, Harper LT, Parsons AJ, Palmer G, Rudd CD, Ahmed I. Mechanical, degradation and cytocompatibility properties of magnesium coated phosphate glass fibre reinforced polycaprolactone composites. J Biomater Appl 2014; 29:675-87. [DOI: 10.1177/0885328214541302] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Retention of mechanical properties of phosphate glass fibre reinforced degradable polyesters such as polycaprolactone and polylactic acid in aqueous media has been shown to be strongly influenced by the integrity of the fibre/polymer interface. A previous study utilising ‘single fibre’ fragmentation tests found that coating with magnesium improved the fibre and matrix interfacial shear strength. Therefore, the aim of this study was to investigate the effects of a magnesium coating on the manufacture and characterisation of a random chopped fibre reinforced polycaprolactone composite. Short chopped strand non-woven phosphate glass fibre mats were sputter coated with degradable magnesium to manufacture phosphate glass fibre/polycaprolactone composites. The degradation behaviour (water uptake, mass loss and pH change of the media) of these polycaprolactone composites as well as of pure polycaprolactone was investigated in phosphate buffered saline. The Mg coated fibre reinforced composites revealed less water uptake and mass loss during degradation compared to the non-coated composites. The cations released were also explored and a lower ion release profile for all three cations investigated (namely Na+, Mg2+ and Ca2+) was seen for the Mg coated composite samples. An increase of 17% in tensile strength and 47% in tensile modulus was obtained for the Mg coated composite samples. Both flexural and tensile properties were investigated and a higher retention of mechanical properties was obtained for the Mg coated fibre reinforced composite samples up to 10 days immersion in PBS. Cytocompatibility study showed both composite samples (coated and non-coated) had good cytocompatibility with human osteosarcoma cell line.
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Affiliation(s)
- Xiaoling Liu
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Muhammad S Hasan
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - David M Grant
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Lee T Harper
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Andrew J Parsons
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Graham Palmer
- Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London, London, UK
| | - Chris D Rudd
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
| | - Ifty Ahmed
- Division of Materials, Mechanics and Structures, Faculty of Engineering, University of Nottingham, Nottingham, UK
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27
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Harmata AJ, Ward CL, Zienkiewicz KJ, Wenke JC, Guelcher SA. Investigating the Effects of Surface-Initiated Polymerization of ε-Caprolactone to Bioactive Glass Particles on the Mechanical Properties of Settable Polymer/Ceramic Composites. JOURNAL OF MATERIALS RESEARCH 2014; 29:2398-2407. [PMID: 25798027 PMCID: PMC4364443 DOI: 10.1557/jmr.2014.254] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Injectable bone grafts with strength exceeding that of trabecular bone could improve the management of a number of orthopaedic conditions. Ceramic/polymer composites have been investigated as weight-bearing bone grafts, but they are typically weaker than trabecular bone due to poor interfacial bonding. We hypothesized that entrapment of surface-initiated poly(ε-caprolactone) (PCL) chains on 45S5 bioactive glass (BG) particles within an in situ-formed polymer network would enhance the mechanical properties of reactive BG/polymer composites. When the surface-initiated PCL molecular weight exceeded the molecular weight between crosslinks of the network, the compressive strength of the composites increased 6- to 10-fold. The torsional strength of the composites exceeded that of human trabecular bone by a factor of two. When injected into femoral condyle defects in rats, the composites supported new bone formation at 8 weeks. The initial bone-like strength of BG/polymer composites and their ability to remodel in vivo highlight their potential for development as injectable grafts for repair of weight-bearing bone defects.
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Affiliation(s)
- Andrew J Harmata
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235 ; Center for Bone Biology, Vanderbilt Medical Center, Nashville, TN 37232
| | - Catherine L Ward
- Orthopaedic Task Area, U.S. Army Institute of Surgical Research, San Antonio, TX 78234
| | - Katarzyna J Zienkiewicz
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235
| | - Joseph C Wenke
- Orthopaedic Task Area, U.S. Army Institute of Surgical Research, San Antonio, TX 78234
| | - Scott A Guelcher
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235 ; Center for Bone Biology, Vanderbilt Medical Center, Nashville, TN 37232 ; Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235
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28
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Dumas JE, Prieto EM, Zienkiewicz KJ, Guda T, Wenke JC, Bible J, Holt GE, Guelcher SA. Balancing the rates of new bone formation and polymer degradation enhances healing of weight-bearing allograft/polyurethane composites in rabbit femoral defects. Tissue Eng Part A 2013; 20:115-29. [PMID: 23941405 DOI: 10.1089/ten.tea.2012.0762] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
There is a compelling clinical need for bone grafts with initial bone-like mechanical properties that actively remodel for repair of weight-bearing bone defects, such as fractures of the tibial plateau and vertebrae. However, there is a paucity of studies investigating remodeling of weight-bearing bone grafts in preclinical models, and consequently there is limited understanding of the mechanisms by which these grafts remodel in vivo. In this study, we investigated the effects of the rates of new bone formation, matrix resorption, and polymer degradation on healing of settable weight-bearing polyurethane/allograft composites in a rabbit femoral condyle defect model. The grafts induced progressive healing in vivo, as evidenced by an increase in new bone formation, as well as a decrease in residual allograft and polymer from 6 to 12 weeks. However, the mismatch between the rates of autocatalytic polymer degradation and zero-order (independent of time) new bone formation resulted in incomplete healing in the interior of the composite. Augmentation of the grafts with recombinant human bone morphogenetic protein-2 not only increased the rate of new bone formation, but also altered the degradation mechanism of the polymer to approximate a zero-order process. The consequent matching of the rates of new bone formation and polymer degradation resulted in more extensive healing at later time points in all regions of the graft. These observations underscore the importance of balancing the rates of new bone formation and degradation to promote healing of settable weight-bearing bone grafts that maintain bone-like strength, while actively remodeling.
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Affiliation(s)
- Jerald E Dumas
- 1 Department of Chemical and Biomolecular Engineering, Vanderbilt University , Nashville, Tennessee
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29
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Lehtonen TJ, Tuominen JU, Hiekkanen E. Dissolution behavior of high strength bioresorbable glass fibers manufactured by continuous fiber drawing. J Mech Behav Biomed Mater 2013; 20:376-86. [PMID: 23537596 DOI: 10.1016/j.jmbbm.2013.01.032] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 01/24/2013] [Accepted: 01/28/2013] [Indexed: 11/15/2022]
Abstract
This article describes the dissolution behavior of three silica-based resorbable glasses manufactured by an industrial-type continuous fiber drawing process yielding fibers with tensile strength of 1800-2300MPa. The results of a long-term in vitro degradation testing of the manufactured high strength bioresorbable glass fibers are presented. The degradation was performed by exposing the glass fibers to SBF and TRIS for 26 weeks at physiological conditions at 37°C. All fibers showed continuous resorption throughout the study and two of the fibers revealed bioactivity by forming a calcium phosphate (CaP) layer in SBF.
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