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Abarzúa-Illanes PN, Padilla C, Ramos A, Isaacs M, Ramos-Grez J, Olguín HC, Valenzuela LM. Improving myoblast differentiation on electrospun poly(ε-caprolactone) scaffolds. J Biomed Mater Res A 2017; 105:2241-2251. [DOI: 10.1002/jbm.a.36091] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Revised: 03/12/2017] [Accepted: 04/14/2017] [Indexed: 01/11/2023]
Affiliation(s)
- Phammela N. Abarzúa-Illanes
- Department of Chemical and Bioprocess Engineering; School of Engineering, Pontificia Universidad Católica de Chile; Santiago Chile
| | - Cristina Padilla
- Department of Chemical and Bioprocess Engineering; School of Engineering, Pontificia Universidad Católica de Chile; Santiago Chile
| | - Andrea Ramos
- Programa de Química, Facultad de Ciencias Básicas, Universidad del Atlántico; Barranquilla Colombia
| | - Mauricio Isaacs
- Department of Inorganic Chemistry School of Chemistry; Pontificia Universidad Católica de Chile; Santiago Chile
- Research Center for Nanotechnology and Advanced Materials “Cien-UC”, Pontificia Universidad Católica de Chile; Santiago Chile
| | - Jorge Ramos-Grez
- Research Center for Nanotechnology and Advanced Materials “Cien-UC”, Pontificia Universidad Católica de Chile; Santiago Chile
- Department of Mechanical and Metallurgical Engineering, School of Engineering; Pontificia Universidad Católica de Chile; Santiago Chile
| | - Hugo C. Olguín
- Department of Cellular and Molecular Biology; School of Biological Sciences, Pontificia Universidad Católica de Chile; Santiago Chile
| | - Loreto M. Valenzuela
- Department of Chemical and Bioprocess Engineering; School of Engineering, Pontificia Universidad Católica de Chile; Santiago Chile
- Research Center for Nanotechnology and Advanced Materials “Cien-UC”, Pontificia Universidad Católica de Chile; Santiago Chile
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Lin HY, Tsai WC, Chang SH. Collagen-PVA aligned nanofiber on collagen sponge as bi-layered scaffold for surface cartilage repair. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:664-678. [DOI: 10.1080/09205063.2017.1295507] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Hsin-Yi Lin
- Graduate Institute of Biochemical and Biomedical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Wen-Chi Tsai
- Graduate Institute of Chemical Engineering, National Taipei University of Technology, Taipei, Taiwan
| | - Shih-Hsing Chang
- Department of Plastic Surgery, Mackay Memorial Hospital, Taipei, Taiwan
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Cecen B, Kozaci LD, Yuksel M, Ustun O, Ergur BU, Havitcioglu H. Biocompatibility and biomechanical characteristics of loofah based scaffolds combined with hydroxyapatite, cellulose, poly- l -lactic acid with chondrocyte-like cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:437-46. [DOI: 10.1016/j.msec.2016.07.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 06/28/2016] [Accepted: 07/04/2016] [Indexed: 10/21/2022]
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Chen W, Chen S, Morsi Y, El-Hamshary H, El-Newhy M, Fan C, Mo X. Superabsorbent 3D Scaffold Based on Electrospun Nanofibers for Cartilage Tissue Engineering. ACS APPLIED MATERIALS & INTERFACES 2016; 8:24415-24425. [PMID: 27559926 DOI: 10.1021/acsami.6b06825] [Citation(s) in RCA: 155] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electrospun nanofibers have been used for various biomedical applications. However, electrospinning commonly produces two-dimensional (2D) membranes, which limits the application of nanofibers for the 3D tissue engineering scaffold. In the present study, a porous 3D scaffold (3DS-1) based on electrospun gelatin/PLA nanofibers has been prepared for cartilage tissue regeneration. To further improve the repairing effect of cartilage, a modified scaffold (3DS-2) cross-linked with hyaluronic acid (HA) was also successfully fabricated. The nanofibrous structure, water absorption, and compressive mechanical properties of 3D scaffold were studied. Chondrocytes were cultured on 3D scaffold, and their viability and morphology were examined. 3D scaffolds were also subjected to an in vivo cartilage regeneration study on rabbits using an articular cartilage injury model. The results indicated that 3DS-1 and 3DS-2 exhibited superabsorbent property and excellent cytocompatibility. Both these scaffolds present elastic property in the wet state. An in vivo study showed that 3DS-2 could enhance the repair of cartilage. The present 3D nanofibrous scaffold (3DS-2) would be promising for cartilage tissue engineering application.
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Affiliation(s)
- Weiming Chen
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
| | - Shuai Chen
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital , 600 Yishan Road, Shanghai 200233, China
| | - Yosry Morsi
- Faculty of Engineering and Industrial Sciences, Swinburne University of Technology , Hawthorn, Vic 3122, Australia
| | - Hany El-Hamshary
- Department of Chemistry, College of Science, King Saud University , Riyadh 11451, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University , Tanta 31527, Egypt
| | - Mohamed El-Newhy
- Department of Chemistry, College of Science, King Saud University , Riyadh 11451, Kingdom of Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University , Tanta 31527, Egypt
| | - Cunyi Fan
- Department of Orthopaedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital , 600 Yishan Road, Shanghai 200233, China
| | - Xiumei Mo
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University , Shanghai 201620, China
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Kim BS, Jang J, Chae S, Gao G, Kong JS, Ahn M, Cho DW. Three-dimensional bioprinting of cell-laden constructs with polycaprolactone protective layers for using various thermoplastic polymers. Biofabrication 2016; 8:035013. [DOI: 10.1088/1758-5090/8/3/035013] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Hsu YH, Lin CT, Yu YH, Chou YC, Liu SJ, Chan EC. Dual delivery of active antibactericidal agents and bone morphogenetic protein at sustainable high concentrations using biodegradable sheath-core-structured drug-eluting nanofibers. Int J Nanomedicine 2016; 11:3927-37. [PMID: 27574423 PMCID: PMC4993267 DOI: 10.2147/ijn.s107250] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
In this study, we developed biodegradable sheath-core-structured drug-eluting nanofibers for sustainable delivery of antibiotics (vancomycin and ceftazidime) and recombinant human bone morphogenetic protein (rhBMP-2) via electrospinning. To prepare the biodegradable sheath-core nanofibers, we first prepared solutions of poly(d,l)-lactide-co-glycolide, vancomycin, and ceftazidime in 1,1,1,3,3,3-hexafluoro-2-propanol and rhBMP-2 in phosphate-buffered solution. The poly(d,l)-lactide-co-glycolide/antibiotics and rhBMP-2 solutions were then fed into two different capillary tubes controlled by two independent pumps for coaxial electrospinning. The electrospun nanofiber morphology was observed under a scanning electron microscope. We further characterized the in vitro antibiotic release from the nanofibers via high-performance liquid chromatography and that of rhBMP-2 via enzyme-linked immunosorbent assay and alkaline phosphatase activity. We showed that the biodegradable coaxially electrospun nanofibers could release high vancomycin/ceftazidime concentrations (well above the minimum inhibition concentration [MIC]90) and rhBMP-2 for >4 weeks. These experimental results demonstrate that novel biodegradable nanofibers can be constructed with various pharmaceuticals and proteins for long-term drug deliveries.
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Affiliation(s)
- Yung-Hen Hsu
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital; Department of Mechanical Engineering
| | | | - Yi-Hsun Yu
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital; Department of Mechanical Engineering
| | - Ying-Chao Chou
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital; Department of Mechanical Engineering
| | - Shih-Jung Liu
- Department of Orthopedic Surgery, Chang Gung Memorial Hospital; Department of Mechanical Engineering
| | - Err-Cheng Chan
- Department of Medical Biotechnology and Laboratory Science, School of Medical Technology, Chang Gung University, Tao-Yuan, Taiwan
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Fabrication of functional PLGA-based electrospun scaffolds and their applications in biomedical engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 59:1181-1194. [DOI: 10.1016/j.msec.2015.11.026] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 10/22/2015] [Accepted: 11/09/2015] [Indexed: 12/17/2022]
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Choi JS, Kim HS, Yoo HS. Electrospinning strategies of drug-incorporated nanofibrous mats for wound recovery. Drug Deliv Transl Res 2016; 5:137-45. [PMID: 25787739 DOI: 10.1007/s13346-013-0148-9] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Electrospun nanofibrous mats have recently been employed as drug reservoirs for their unique features, such as high surface-to-volume ratios and easy fabrication process. We describe herein various methods of fabricating drug- and gene-encapsulated nanofibrous meshes, which can be prepared by electrospinning. The electrospinning process of nanofibrous mats is affected by many parameters, including viscosity and ejection speeds of the polymeric solutions and the electrical potential applied to the system. Both single- and dual-nozzle systems are widely employed in the preparation of electrospun nanofibers encapsulating drugs and genes, which are usually incorporated into the electrospun mats either by physical mixing with polymeric solutions before electrospinning or by physical incorporation after electrospinning. Various strategies have been tailored to maintain the bioactivity of proteins for tissue regeneration before and after electrospinning. Nucleic acids, such as DNA and siRNA, are also incorporated into nanofibrous meshes to enhance tissue regeneration by expressing transgenes or silencing domestic genes in specific tissues. Drug- or gene-incorporated nanofibrous meshes can greatly increase tissue regeneration rates and reduce scar formation in normal and diabetic wounds. Hybrid nanofibers, with multiple cell layers or hydrogels, have also been used to improve wound healing efficiency by increasing cell infiltration.
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Affiliation(s)
- Ji Suk Choi
- Department of Biomedical Materials Engineering, School of Bioscience and Bioengineering, Kangwon National University, Chuncheon, 200-701, Republic of Korea
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Lee J, Park TH, Lee KJ, Lahann J. Snail-like Particles from Compartmentalized Microfibers. Macromol Rapid Commun 2015; 37:73-78. [PMID: 26488433 DOI: 10.1002/marc.201500431] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/12/2015] [Indexed: 12/13/2022]
Affiliation(s)
- Jaemin Lee
- Department of Fine Chemical Engineering and Applied Chemistry; College of Engineering; Chungnam National University; Daejeon 305-764 Korea
| | - Tae-Hong Park
- Department of Chemical Engineering; Macromolecular Science and Engineering and Department of Materials Science and Engineering; University of Michigan; Ann Arbor MI 48109 USA
- Nuclear Chemistry Research Division; Korea Atomic Energy Research Institute; Daejeon 305-353 Korea
| | - Kyung Jin Lee
- Department of Fine Chemical Engineering and Applied Chemistry; College of Engineering; Chungnam National University; Daejeon 305-764 Korea
- Department of Chemical Engineering; Macromolecular Science and Engineering and Department of Materials Science and Engineering; University of Michigan; Ann Arbor MI 48109 USA
| | - Joerg Lahann
- Department of Chemical Engineering; Macromolecular Science and Engineering and Department of Materials Science and Engineering; University of Michigan; Ann Arbor MI 48109 USA
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Góra A, Prabhakaran MP, Eunice GTL, Lakshminarayanan R, Ramakrishna S. Silver nanoparticle incorporated poly(l-lactide-co-glycolide) nanofibers: Evaluation of their biocompatibility and antibacterial properties. J Appl Polym Sci 2015. [DOI: 10.1002/app.42686] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Aleksander Góra
- Center for Nanofibers and Nanotechnology; Department of Mechanical Engineering; National University of Singapore; 2 Engineering Drive 3 117576 Singapore Singapore
| | - Molamma P. Prabhakaran
- Center for Nanofibers and Nanotechnology; Department of Mechanical Engineering; National University of Singapore; 2 Engineering Drive 3 117576 Singapore Singapore
| | - Goh Tze Leng Eunice
- Anti-Infectives Research Group, Singapore Eye Research Institute; Singapore 168751 Singapore
| | - Rajamani Lakshminarayanan
- Anti-Infectives Research Group, Singapore Eye Research Institute; Singapore 168751 Singapore
- Duke-NUS SRP Neuroscience and Behavioural Disorders; Singapore 169857 Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology; Department of Mechanical Engineering; National University of Singapore; 2 Engineering Drive 3 117576 Singapore Singapore
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Jiang T, Carbone EJ, Lo KWH, Laurencin CT. Electrospinning of polymer nanofibers for tissue regeneration. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.12.001] [Citation(s) in RCA: 336] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Khan M, Xu Y, Hua S, Johnson J, Belevych A, Janssen PML, Gyorke S, Guan J, Angelos MG. Evaluation of Changes in Morphology and Function of Human Induced Pluripotent Stem Cell Derived Cardiomyocytes (HiPSC-CMs) Cultured on an Aligned-Nanofiber Cardiac Patch. PLoS One 2015; 10:e0126338. [PMID: 25993466 PMCID: PMC4437999 DOI: 10.1371/journal.pone.0126338] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 04/01/2015] [Indexed: 11/18/2022] Open
Abstract
Introduction Dilated cardiomyopathy is a major cause of progressive heart failure. Utilization of stem cell therapy offers a potential means of regenerating viable cardiac tissue. However, a major obstacle to stem cell therapy is the delivery and survival of implanted stem cells in the ischemic heart. To address this issue, we have developed a biomimetic aligned nanofibrous cardiac patch and characterized the alignment and function of human inducible pluripotent stem cell derived cardiomyocytes (hiPSC-CMs) cultured on this cardiac patch. This hiPSC-CMs seeded patch was compared with hiPSC-CMs cultured on standard flat cell culture plates. Methods hiPSC-CMs were cultured on; 1) a highly aligned polylactide-co-glycolide (PLGA) nanofiber scaffold (~50 microns thick) and 2) on a standard flat culture plate. Scanning electron microscopy (SEM) was used to determine alignment of PLGA nanofibers and orientation of the cells on the respective surfaces. Analysis of gap junctions (Connexin-43) was performed by confocal imaging in both the groups. Calcium cycling and patch-clamp technique were performed to measure calcium transients and electrical coupling properties of cardiomyocytes. Results SEM demonstrated >90% alignment of the nanofibers in the patch which is similar to the extracellular matrix of decellularized rat myocardium. Confocal imaging of the cardiomyocytes demonstrated symmetrical alignment in the same direction on the aligned nanofiber patch in sharp contrast to the random appearance of cardiomyocytes cultured on a tissue culture plate. The hiPSC-CMs cultured on aligned nanofiber cardiac patches showed more efficient calcium cycling compared with cells cultured on standard flat surface culture plates. Quantification of mRNA with qRT-PCR confirmed that these cardiomyocytes expressed α-actinin, troponin-T and connexin-43 in-vitro. Conclusions Overall, our results demonstrated changes in morphology and function of human induced pluripotent derived cardiomyocytes cultured in an anisotropic environment created by an aligned nanofiber patch. In this environment, these cells better approximate normal cardiac tissue compared with cells cultured on flat surface and can serve as the basis for bioengineering of an implantable cardiac patch.
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Affiliation(s)
- Mahmood Khan
- Department of Emergency Medicine, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Yanyi Xu
- Department of Materials Science and Engineering, Davis Heart Lung Research Institute, Ohio State University, Columbus, OH, United States of America
| | - Serena Hua
- Department of Emergency Medicine, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Jed Johnson
- Nanofiber Solutions, Columbus, OH, United States of America
| | - Andriy Belevych
- Department of Physiology and Cell Biology, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Paul M. L. Janssen
- Department of Physiology and Cell Biology, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Sandor Gyorke
- Department of Physiology and Cell Biology, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
| | - Jianjun Guan
- Department of Materials Science and Engineering, Davis Heart Lung Research Institute, Ohio State University, Columbus, OH, United States of America
| | - Mark G. Angelos
- Department of Emergency Medicine, Davis Heart Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, OH, United States of America
- * E-mail:
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DiameterJ: A validated open source nanofiber diameter measurement tool. Biomaterials 2015; 61:327-38. [PMID: 26043061 DOI: 10.1016/j.biomaterials.2015.05.015] [Citation(s) in RCA: 292] [Impact Index Per Article: 32.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 05/04/2015] [Accepted: 05/14/2015] [Indexed: 01/10/2023]
Abstract
Despite the growing use of nanofiber scaffolds for tissue engineering applications, there is not a validated, readily available, free solution for rapid, automated analysis of nanofiber diameter from scanning electron microscope (SEM) micrographs. Thus, the goal of this study was to create a user friendly ImageJ/FIJI plugin that would analyze SEM micrographs of nanofibers to determine nanofiber diameter on a desktop computer within 60 s. Additional design goals included 1) compatibility with a variety of existing segmentation algorithms, and 2) an open source code to enable further improvement of the plugin. Using existing algorithms for centerline determination, Euclidean distance transforms and a novel pixel transformation technique, a plugin called "DiameterJ" was created for ImageJ/FIJI. The plugin was validated using 1) digital synthetic images of white lines on a black background and 2) SEM images of nominally monodispersed steel wires of known diameters. DiameterJ analyzed SEM micrographs in 20 s, produced diameters not statistically different from known values, was over 10-times closer to known diameter values than other open source software, provided hundreds of times the sampling of manual measurement, and was hundreds of times faster than manual assessment of nanofiber diameter. DiameterJ enables users to rapidly and thoroughly determine the structural features of nanofiber scaffolds and could potentially allow new insights to be formed into fiber diameter distribution and cell response.
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Handarmin, Tan GJY, Sundaray B, Marcy GT, Goh ELK, Chew SY. Nanofibrous scaffold with incorporated protein gradient for directing neurite outgrowth. Drug Deliv Transl Res 2015; 1:147-60. [PMID: 25788113 DOI: 10.1007/s13346-011-0017-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Concentration gradient of diffusible bioactive chemicals assumes many important roles in regulating cellular behavior. Among the many factors influencing functional recovery after nerve injury, such as topographical and biochemical signals, concentration gradients of neurotrophic factors provide chemotactic cues for neurite outgrowth and targeted renervation. In this study, a concentration gradient of nerve growth factor (NGF, 0-250 μg/ml) was incorporated throughout the thickness of poly(ε-caprolactone)-poly(ethylene glycol) coaxial electrospun nanofibrous scaffolds (∼700 μm thick with ∼800 nm average fiber diameter). The existence of the protein gradient upon protein release was demonstrated using a customized under-agarose-PC12 neurite outgrowth assay. When exposed to scaffolds endowed with NGF concentration gradient (NGF-CG), a significant difference in the percentage of cells bearing neurite outgrowth was observed (7.1 ± 1.9% vs. 0.8 ± 0.3% for cells exposed to high vs. low concentration surface, respectively; p < 0.05). In contrast, no significant difference was observed when cells were exposed to scaffolds that encapsulated a fixed concentration of NGF. Direct culture of PC12 cells on the substrates demonstrated the cytocompatibility and the effect of diffusible NGF gradient on neurite outgrowth. A significant difference in the percentage of cells with neurite extensions was observed when PC12 cells were seeded on NGF-CG scaffolds (21.2 ± 3.6% vs. 10.4 ± 1.3% on high vs. low concentration surface, respectively; p < 0.05). Furthermore, Z-stack confocal microscopy tracking of neurite extensions revealed the chemotatic guidance effect of NGF concentration gradient. Directed and enhanced neurite penetration into the scaffolds towards increasing NGF concentration was observed. In vitro release study indicated that the encapsulated NGF was released in a sustained manner for at least 30 days (80.4 ± 3.6% released). Taken together, this study demonstrates the feasibility of incorporating concentration gradient of diffusible bioactive chemicals in nanofibrous scaffolds via the coaxial electrospinning technique.
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Affiliation(s)
- Handarmin
- School of Chemical and Biomedical Engineering, Nanyang Technological University, N1.2-B2-20, 62 Nanyang Drive, Singapore, 637459, Singapore
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Eco-friendly Electrospun Polymeric Nanofibers-Based Nanocomposites for Wound Healing and Tissue Engineering. ADVANCED STRUCTURED MATERIALS 2015. [DOI: 10.1007/978-81-322-2470-9_13] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
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67
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Blends and Nanocomposite Biomaterials for Articular Cartilage Tissue Engineering. MATERIALS 2014; 7:5327-5355. [PMID: 28788131 PMCID: PMC5455822 DOI: 10.3390/ma7075327] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 07/10/2014] [Accepted: 07/14/2014] [Indexed: 12/18/2022]
Abstract
This review provides a comprehensive assessment on polymer blends and nanocomposite systems for articular cartilage tissue engineering applications. Classification of various types of blends including natural/natural, synthetic/synthetic systems, their combination and nanocomposite biomaterials are studied. Additionally, an inclusive study on their characteristics, cell responses ability to mimic tissue and regenerate damaged articular cartilage with respect to have functionality and composition needed for native tissue, are also provided.
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Ajalloueian F, Zeiai S, Fossum M, Hilborn JG. Constructs of electrospun PLGA, compressed collagen and minced urothelium for minimally manipulated autologous bladder tissue expansion. Biomaterials 2014; 35:5741-8. [DOI: 10.1016/j.biomaterials.2014.04.002] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2014] [Accepted: 04/01/2014] [Indexed: 11/25/2022]
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Bissoyi A, Pramanik K, Panda NN, Sarangi S. Cryopreservation of hMSCs seeded silk nanofibers based tissue engineered constructs. Cryobiology 2014; 68:332-42. [DOI: 10.1016/j.cryobiol.2014.04.008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 03/31/2014] [Accepted: 04/13/2014] [Indexed: 10/25/2022]
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Clark A, Milbrandt TA, Hilt JZ, Puleo DA. Mechanical properties and dual drug delivery application of poly(lactic-co-glycolic acid) scaffolds fabricated with a poly(β-amino ester) porogen. Acta Biomater 2014; 10:2125-32. [PMID: 24424269 DOI: 10.1016/j.actbio.2013.12.061] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Revised: 11/22/2013] [Accepted: 12/30/2013] [Indexed: 10/25/2022]
Abstract
Polymeric scaffolds that are biocompatible and biodegradable are widely used for tissue engineering applications. Scaffolds can be further enhanced by enabling the release of one or more drugs to stimulate regeneration or for the treatment of a specific disease or condition. In this study, poly(lactic-co-glycolic acid) (PLGA) microspheres were mixed with poly(β-amino ester) (PBAE) particles to create novel hybrid scaffolds capable of dual release of drug and growth factor. Fast-degrading PBAE particles loaded with the drug ketoprofen acted as porogens that provided a rapid 12h release. The PLGA microspheres were loaded with a growth factor, bone morphogenetic protein 2, and fused together around the porogens to create a slow-degrading matrix that provided sustained release lasting 70days. Drug release was further tailored by varying the amount of porogen added to the scaffold. Bioactivity measurements demonstrated that the scaffold fabrication technique did not damage the drug or protein. The compressive modulus was affected by the amount of porogen added, extending from 50 to 111MPa for loadings from 60 to 40% PBAE, and after 5days of degradation, it decreased to 0.6 to 1.1kPa when the porogen was gone. PLGA containing a quick-degrading porogen can be used to release two drugs while developing a porous microarchitecture for cell ingrowth with in a matrix capable of maintaining a compressive modulus applicable for soft tissue implants.
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Kai D, Liow SS, Loh XJ. Biodegradable polymers for electrospinning: towards biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:659-70. [PMID: 25491875 DOI: 10.1016/j.msec.2014.04.051] [Citation(s) in RCA: 218] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 04/02/2014] [Accepted: 04/21/2014] [Indexed: 10/25/2022]
Abstract
Electrospinning has received much attention recently due to the growing interest in nano-technologies and the unique material properties. This review focuses on recent progress in applying electrospinning technique in production of biodegradable nanofibers to the emerging field of biomedical. It first introduces the basic theory and parameters of nanofibers fabrication, with focus on factors affecting the morphology and fiber diameter of biodegradable nanofibers. Next, commonly electrospun biodegradable nanofibers are discussed, and the comparison of the degradation rate of nanoscale materials with macroscale materials are highlighted. The article also assesses the recent advancement of biodegradable nanofibers in different biomedical applications, including tissue engineering, drug delivery, biosensor and immunoassay. Future perspectives of biodegradable nanofibers are discussed in the last section, which emphasizes on the innovation and development in electrospinning of hydrogels nanofibers, pore size control and scale-up productions.
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Affiliation(s)
- Dan Kai
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
| | - Sing Shy Liow
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE) Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore; Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore; Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore 168751, Singapore.
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Puppi D, Zhang X, Yang L, Chiellini F, Sun X, Chiellini E. Nano/microfibrous polymeric constructs loaded with bioactive agents and designed for tissue engineering applications: a review. J Biomed Mater Res B Appl Biomater 2014; 102:1562-79. [PMID: 24678016 DOI: 10.1002/jbm.b.33144] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 01/29/2014] [Accepted: 03/06/2014] [Indexed: 01/04/2023]
Abstract
Nano/microfibrous polymeric constructs present various inherent advantages, such as highly porous architecture and high surface to volume ratio, making them attractive for tissue engineering purposes. Electrospinning is the most preferred technique for the fabrication of polymeric nanofibrous assemblies that can mimic the physical functions of native extracellular matrix greatly favoring cells attachment and thus influencing their morphology and activities. Different approaches have been developed to apply polymeric microfiber fabrication techniques (e.g. wet-spinning) for the obtainment of scaffolds with a three-dimensional network of micropores suitable for effective cells migration. Progress in additive manufacturing technology has led to the development of complex scaffold's shapes and microfibrous structures with a high degree of automation, good accuracy and reproducibility. Various loading methods, such as direct blending, coaxial electrospinning and microparticles incorporation, are enabling to develop customized strategies for the biofunctionalization of nano/microfibrous scaffolds with a tailored kinetics of release of different bioactive agents, ranging from small molecules, such as antibiotics, to protein drugs, such as growth factors, and even cells. Recent activities on the combination of different processing techniques and loading methods for the obtainment of biofunctionalized polymeric constructs with a complex multiscale structure open new possibilities for the development of biomimetic scaffolds endowed with a hierarchical architecture and a sophisticated release kinetics of different bioactive agents. This review is aimed at summarizing current advances in technologies and methods for manufacturing nano/microfibrous polymeric constructs suitable as tissue engineering scaffolds, and for their combination with different bioactive agents to promote tissue regeneration and therapeutic effects.
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Affiliation(s)
- Dario Puppi
- Department of Chemistry and Industrial Chemistry, Laboratory of Bioactive Polymeric Materials for Biomedical and Environmental Applications (BIOlab), University of Pisa, 56010, San Piero a Grado (Pi), Italy
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73
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Zhang H, Zhou L, Zhang W. Control of scaffold degradation in tissue engineering: a review. TISSUE ENGINEERING PART B-REVIEWS 2014; 20:492-502. [PMID: 24547761 DOI: 10.1089/ten.teb.2013.0452] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Tissue engineering has shown a great promise as a solution to the high demand for tissue and organ transplantations. Biomaterial scaffolds serve to house and direct cells to grow, exposing them to an adequate perfusion of nutrients, oxygen, metabolic products, and appropriate growth factors to enhance their differentiation and function. The degradation of biomaterial scaffolds is a key factor to successful tissue regeneration. In this article, the existing degradation control approaches in the context of scaffold tissue engineering were reviewed and a new paradigm of thinking called active control of scaffold degradation, proposed elsewhere by us, was also revisited and discussed in light of its benefit and requirement of this new technology.
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Affiliation(s)
- Hongbo Zhang
- 1 Complex and Intelligent Research Centre, School of Mechanical and Power Engineering, East China University of Science and Technology , Shanghai, P.R. China
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74
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Lee CH, Hsieh MJ, Chang SH, Lin YH, Liu SJ, Lin TY, Hung KC, Pang JHS, Juang JH. Enhancement of diabetic wound repair using biodegradable nanofibrous metformin-eluting membranes: in vitro and in vivo. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3979-3986. [PMID: 24568239 DOI: 10.1021/am405329g] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This work developed biodegradable nanofibrous drug-eluting membranes that provided sustained release of metformin for repairing wounds associated with diabetes. To prepare the biodegradable membranes, poly-d-l-lactide-glycolide (PLGA) and metformin were first dissolved in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) and were spun into nanofibrous membranes by electrospinning. An elution method and an HPLC assay were utilized to characterize the in vivo and in vitro release rates of the pharmaceuticals from the membranes. The biodegradable nanofibrous membranes released high concentrations of metformin for more than three weeks. Moreover, nanofibrous metformin-eluting PLGA membranes were more hydrophilic and had a greater water-containing capacity than virgin PLGA fibers. The membranes also improved wound healing and re-epithelialization in diabetic rats relative to the control. The experimental results in this work suggest that nanofibrous metformin-eluting membranes were functionally active in the treatment of diabetic wounds and very effective as accelerators in the early stage of healing of such wounds.
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Affiliation(s)
- Cheng-Hung Lee
- Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital-Linkou, Chang Gung University College of Medicine , Tao-Yuan, Taiwan
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75
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Schuld NJ, Vervacke JS, Lorimer EL, Simon NC, Hauser AD, Barbieri JT, Distefano MD, Williams CL. The chaperone protein SmgGDS interacts with small GTPases entering the prenylation pathway by recognizing the last amino acid in the CAAX motif. J Biol Chem 2014; 289:6862-6876. [PMID: 24415755 PMCID: PMC3945348 DOI: 10.1074/jbc.m113.527192] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2013] [Revised: 01/09/2014] [Indexed: 12/31/2022] Open
Abstract
Ras family small GTPases localize at the plasma membrane, where they can activate oncogenic signaling pathways. Understanding the mechanisms that promote membrane localization of GTPases will aid development of new therapies to inhibit oncogenic signaling. We previously reported that SmgGDS splice variants promote prenylation and trafficking of GTPases containing a C-terminal polybasic region and demonstrated that SmgGDS-607 interacts with nonprenylated GTPases, whereas SmgGDS-558 interacts with prenylated GTPases in cells. The mechanism that SmgGDS-607 and SmgGDS-558 use to differentiate between prenylated and nonprenylated GTPases has not been characterized. Here, we provide evidence that SmgGDS-607 associates with GTPases through recognition of the last amino acid in the CAAX motif. We show that SmgGDS-607 forms more stable complexes in cells with nonprenylated GTPases that will become geranylgeranylated than with nonprenylated GTPases that will become farnesylated. These binding relationships similarly occur with nonprenylated SAAX mutants. Intriguingly, farnesyltransferase inhibitors increase the binding of WT K-Ras to SmgGDS-607, indicating that the pharmacological shunting of K-Ras into the geranylgeranylation pathway promotes K-Ras association with SmgGDS-607. Using recombinant proteins and prenylated peptides corresponding to the C-terminal sequences of K-Ras and Rap1B, we found that both SmgGDS-607 and SmgGDS-558 directly bind the GTPase C-terminal region, but the specificity of the SmgGDS splice variants for prenylated versus nonprenylated GTPases is diminished in vitro. Finally, we present structural homology models and data from functional prediction software to define both similar and unique features of SmgGDS-607 when compared with SmgGDS-558.
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Affiliation(s)
- Nathan J Schuld
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Jeffrey S Vervacke
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55414
| | - Ellen L Lorimer
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Nathan C Simon
- Department of Microbiology, Immunology, and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Andrew D Hauser
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Joseph T Barbieri
- Department of Microbiology, Immunology, and Molecular Genetics, Medical College of Wisconsin, Milwaukee, Wisconsin 53226
| | - Mark D Distefano
- Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55414
| | - Carol L Williams
- Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin 53226.
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76
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Kim HS, Yoo HS. Therapeutic application of electrospun nanofibrous meshes. Nanomedicine (Lond) 2014; 9:517-33. [DOI: 10.2217/nnm.13.224] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fabricating tissue architecture-mimicking scaffolds is one of the major challenges in the field of tissue engineering. Electrospun nanofibers have been considered as potent techniques for fabricating fibrous scaffolds biomimicking extracellular frameworks. Therapeutic agent-incorporated nanofibrous meshes have widely served as excellent substrates for adhesion, proliferation and differentiation. Many drugs, proteins and nucleic acids were incorporated into the scaffolds for regeneration of skin, musculoskeletal, neural and vascular tissue engineering in aims to control the release of the therapeutic agents. In the current article, we focus on introducing various fabrication techniques for electrospun nanofiber-based scaffolds and subsequent functionalization of nanofibers for therapeutic purposes. We also detail how the therapeutic nanofibrous meshes can be employed in the field of tissue engineering.
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Affiliation(s)
- Hye Sung Kim
- Department of Biomedical Materials Engineering, School of Bioscience & Bioengineering, Kangwon National University, Chuncheon 200-701, Republic of Korea
| | - Hyuk Sang Yoo
- Department of Biomedical Materials Engineering, School of Bioscience & Bioengineering, Kangwon National University, Chuncheon 200-701, Republic of Korea
- Institute of Bioscience & Biotechnology, Kangwon National University, Republic of Korea
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77
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Effects of hydrostatic pressure on biosynthetic activity during chondrogenic differentiation of MSCs in hybrid scaffolds. Int J Artif Organs 2014; 37:142-8. [PMID: 24619897 DOI: 10.5301/ijao.5000288] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2013] [Indexed: 11/20/2022]
Abstract
The objective of this study was to determine the effects of hydrostatic pressure (HP) on the biochemical properties and gene expression of mesenchymal stem cells (MSCs) on scaffolds for cartilage tissue engineering composed of poly(caprolactone) (PCL) poly(vinyl alcohol) (PVA) gelatin (GEL) semi interpenetrating polymer network (semi-IPN). The MSCs were cultured on PCL-PVA-GEL semi-IPN scaffolds in two groups (A and B) for 7 and 21 days, respectively, and then loaded with hydrostatic pressure (5 MPa, 0.5 Hz) for 2 h per day for the period of 7 days and compared with two non-loaded groups (C and D) as controls. DMMB and real-time PCR analysis for assaying cartilage-specific extracellular matrix (ECM) gene markers were carried out. According to the results, there were no significant differences in GAG amounts between the loaded and non-loaded constructs were observed after 14 days. However, significant and considerable increases in the expression amount of type II collagen mRNA levels in group A ( from 2.43 × 10-4 ± 5.32 × 10-5 to 2.09 × 10-3 ± 1.07 × 10-4 time), and in group B (from 3.04 × 10-4 ± 4.31 × 10-5 to 2.08 × 10-3 ± 1.59 × 10-4 time) in comparison with non-loaded groups (C and D) were observed, respectively. Results showed the beneficial role of hydrostatic pressure on the increase of type II collagen mRNA levels in articular cartilage tissue engineering.
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78
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He X, Fu W, Feng B, Wang H, Liu Z, Yin M, Wang W, Zheng J. Electrospun collagen-poly(L-lactic acid-co-ε-caprolactone) membranes for cartilage tissue engineering. Regen Med 2014; 8:425-36. [PMID: 23826697 DOI: 10.2217/rme.13.29] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
AIM To study the feasibility of electrospun collagen-poly(L-lactic acid-co-ε-caprolactone) (collagen-PLCL) membranes for cartilage tissue engineering. MATERIALS & METHODS Characteristics and mechanical properties of collagen-PLCL membranes were analyzed. The cell affinity of collagen-PLCL membranes with chondrocytes was also assessed. Then, the cell-scaffold constructs were engineered with collagen-PLCL membranes seeded chondrocytes by a sandwich model. After culture for 1 week in vitro, the constructs were implanted subcutaneously into nude mice for 4, 8 and 12 weeks, followed by evaluation of the quality of neocartilage. RESULTS Collagen-PLCL membranes exhibited excellent balanced properties without cytotoxicity. With the extension of implantation time in vivo, the constructs revealed more cartilage-like tissue especially at 8 and 12 weeks. The Young's modulus of the constructs also significantly increased and neared that of native cartilage at 12 weeks postimplantation. CONCLUSION We suggest that collagen-PLCL membranes facilitate the formation of cartilage and thus may represent a promising scaffold for cartilage tissue engineering.
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Affiliation(s)
- Xiaomin He
- Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dong Fang Road, Shanghai 200127, China
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79
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Shabani I, Haddadi-Asl V, Soleimani M, Seyedjafari E, Hashemi SM. Ion-exchange polymer nanofibers for enhanced osteogenic differentiation of stem cells and ectopic bone formation. ACS APPLIED MATERIALS & INTERFACES 2014; 6:72-82. [PMID: 24328219 DOI: 10.1021/am404500c] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Nanofibrous scaffolds with specific modifications have shown promising potential for bone tissue engineering applications. In the present study, poly(ether sulfone) (PES) and sulfonated PES (SPES) nanofibers were fabricated via electrospinning. Calcium ions were then incorporated in SPES by immersion in a Ca(OH)2 solution. The calcium-ion-exchanged SPES (Ca-SPES), PES, and SPES nanofibers were characterized and then evaluated for their osteogenic capacity: both in vitro using stem cell culture and in vivo after subcutaneous implantation in mice. After 7 days of immersion in simulated body fluid, the formation of an apatite layer was only observed on Ca-SPES nanofibers. According to the MTT results, an increasing stem cell population was detected on all scaffolds during the period of study. Using real-time reverse transcriptase-polymerase chain reaction, alkaline phosphatase activity, and calcium content assays, it was demonstrated that the osteogenic differentiation of stem cells was higher on Ca-SPES scaffolds in comparison with PES and SPES nanofibers. Interestingly, Ca-SPES scaffolds were shown to induce ectopic bone formation after 12 weeks of subcutaneous implantation in mice. This was confirmed by mineralization and the production of collagen fibers using van Kossa and Masson's trichrome staining, respectively. Taken together, it was demonstrated that the incorporation of calcium ions into the ion-exchange nanofibrous scaffolds not only gives them the ability to enhance osteogenic differentiation of stem cells in vitro but also to induce ectopic bone formation in vivo.
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Affiliation(s)
- Iman Shabani
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology , Tehran, Iran
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80
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Tian B, Shankarappa S, Chang HH, Tong R, Kohane DS. Biodegradable mesostructured polymer membranes. NANO LETTERS 2013; 13:4410-4415. [PMID: 23964960 PMCID: PMC3799971 DOI: 10.1021/nl402251x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The extracellular matrix (ECM) has a quasi-ordered reticular mesostructure with feature sizes on the order of tenths of to a few hundred nanometers. Approaches to preparing biodegradable synthetic scaffolds for engineered tissues that have the critical mesostructure to mimic ECM are few. Here we present a simple and general solvent evaporation-induced self-assembly (EISA) approach to preparing concentrically reticular mesostructured polyol-polyester membranes. The mesostructures were formed by a novel self-assembly process without covalent or electrostatic interactions, which yielded feature sizes matching those of ECM. The mesostructured materials were nonionic, hydrophilic, and water-permeable and could be shaped into arbitrary geometries such as conformally molded tubular sacs and micropatterned meshes. Importantly, the mesostructured polymers were biodegradable and were used as ultrathin temporary substrates for engineering vascular tissue constructs.
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Affiliation(s)
- Bozhi Tian
- Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Sahadev Shankarappa
- Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Homer H. Chang
- Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Rong Tong
- Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Daniel S. Kohane
- Department of Anesthesiology, Division of Critical Care Medicine, Children's Hospital Boston, Harvard Medical School, Boston, Massachusetts 02115, USA
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81
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Liu M, Cheng Z, Jin Y, Ru X, Ding D, Li J. Optimization and investigation of the governing parameters in electrospinning the home-made poly(l-lactide-co-ε-caprolactone-diOH). J Appl Polym Sci 2013. [DOI: 10.1002/app.39592] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mengzhu Liu
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | | | - Yi Jin
- China Criminal Police University; Shenyang; 110035; People's Republic of China
| | - Xin Ru
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Dawei Ding
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Junfeng Li
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
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82
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Ye K, Felimban R, Moulton SE, Wallace GG, Bella CD, Traianedes K, Choong PFM, Myers DE. Bioengineering of articular cartilage: past, present and future. Regen Med 2013; 8:333-49. [DOI: 10.2217/rme.13.28] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The treatment of cartilage defects poses a clinical challenge owing to the lack of intrinsic regenerative capacity of cartilage. The use of tissue engineering techniques to bioengineer articular cartilage is promising and may hold the key to the successful regeneration of cartilage tissue. Natural and synthetic biomaterials have been used to recreate the microarchitecture of articular cartilage through multilayered biomimetic scaffolds. Acellular scaffolds preserve the microarchitecture of articular cartilage through a process of decellularization of biological tissue. Although promising, this technique often results in poor biomechanical strength of the graft. However, biomechanical strength could be improved if biomaterials could be incorporated back into the decellularized tissue to overcome this limitation.
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Affiliation(s)
- Ken Ye
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia.
| | - Raed Felimban
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Simon E Moulton
- Intelligent Polymer Research Institute, University of Wollongong, ARC Centre of Excellence for Electromaterials Science (ACES), Squires Way, North Wollongong, New South Wales 2552, Australia
| | - Gordon G Wallace
- Intelligent Polymer Research Institute, University of Wollongong, ARC Centre of Excellence for Electromaterials Science (ACES), Squires Way, North Wollongong, New South Wales 2552, Australia
| | - Claudia Di Bella
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Kathy Traianedes
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
| | - Peter FM Choong
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
| | - Damian E Myers
- Department of Surgery, St Vincent’s Hospital, University of Melbourne, Fitzroy, Victoria 3065, Australia
- Department of Orthopaedics, St Vincent’s Hospital, Fitzroy, Victoria 3065, Australia
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83
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Bosworth LA, Turner LA, Cartmell SH. State of the art composites comprising electrospun fibres coupled with hydrogels: a review. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2013. [DOI: 10.1016/j.nano.2012.10.008] [Citation(s) in RCA: 112] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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84
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Hou S, Zhao L, Shen Q, Yu J, Ng C, Kong X, Wu D, Song M, Shi X, Xu X, OuYang WH, He R, Zhao XZ, Lee T, Brunicardi FC, Garcia MA, Ribas A, Lo RS, Tseng HR. Polymer nanofiber-embedded microchips for detection, isolation, and molecular analysis of single circulating melanoma cells. Angew Chem Int Ed Engl 2013; 52:3379-83. [PMID: 23436302 PMCID: PMC3807678 DOI: 10.1002/anie.201208452] [Citation(s) in RCA: 181] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2012] [Revised: 12/20/2012] [Indexed: 12/19/2022]
Affiliation(s)
- Shuang Hou
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA, Web: http://www.tseng-lab.com
| | - Libo Zhao
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
| | - Qinglin Shen
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
- Department of Applied Physics and Department of Oncology Surgery,
Wuhan University, Wuhan, PRC
| | - Juehua Yu
- Department of Surgery, University of California, Los Angeles
| | - Charles Ng
- Division of Hematology and Oncology, Department of Medicine,
Department of Surgery, and Department of Molecular and Medical Pharmacology,
University of California, Los Angeles
| | - Xiangju Kong
- Division of Dermatology, Department of Medicine, University of
California, Los Angeles
| | - Dongxia Wu
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
| | - Min Song
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
| | - Xiaohong Shi
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
| | - Xiaochun Xu
- CytoLumina Technologies Corp., 21038 Commerce Point Dr., Walnut,
CA 91789, USA
| | - Wei-Han OuYang
- CytoLumina Technologies Corp., 21038 Commerce Point Dr., Walnut,
CA 91789, USA
| | - Rongxian He
- Department of Applied Physics and Department of Oncology Surgery,
Wuhan University, Wuhan, PRC
| | - Xing-Zhong Zhao
- Department of Applied Physics and Department of Oncology Surgery,
Wuhan University, Wuhan, PRC
| | - Tom Lee
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
| | | | - Mitch André Garcia
- CytoLumina Technologies Corp., 21038 Commerce Point Dr., Walnut,
CA 91789, USA
| | - Antoni Ribas
- Division of Hematology and Oncology, Department of Medicine,
Department of Surgery, and Department of Molecular and Medical Pharmacology,
University of California, Los Angeles
| | - Roger S. Lo
- Division of Dermatology, Department of Medicine, University of
California, Los Angeles
| | - Hsian-Rong Tseng
- Department of Molecular and Medical Pharmacology, Crump Institute
for Molecular Imaging (CIMI), California NanoSystems Institute (CNSI),
University of California, Los Angeles, 570 Westwood Plaza, Building 114, Los
Angeles, CA 90095-1770, USA
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85
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Hou S, Zhao L, Shen Q, Yu J, Ng C, Kong X, Wu D, Song M, Shi X, Xu X, OuYang WH, He R, Zhao XZ, Lee T, Brunicardi FC, Garcia MA, Ribas A, Lo RS, Tseng HR. Polymer Nanofiber-Embedded Microchips for Detection, Isolation, and Molecular Analysis of Single Circulating Melanoma Cells. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208452] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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86
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Lu T, Li Y, Chen T. Techniques for fabrication and construction of three-dimensional scaffolds for tissue engineering. Int J Nanomedicine 2013; 8:337-50. [PMID: 23345979 PMCID: PMC3551462 DOI: 10.2147/ijn.s38635] [Citation(s) in RCA: 240] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Three-dimensional biomimetic scaffolds have widespread applications in biomedical tissue engineering because of their nanoscaled architecture, eg, nanofibers and nanopores, similar to the native extracellular matrix. In the conventional “top-down” approach, cells are seeded onto a biocompatible and biodegradable scaffold, in which cells are expected to populate in the scaffold and create their own extracellular matrix. The top-down approach based on these scaffolds has successfully engineered thin tissues, including skin, bladder, and cartilage in vitro. However, it is still a challenge to fabricate complex and functional tissues (eg, liver and kidney) due to the lack of vascularization systems and limited diffusion properties of these large biomimetic scaffolds. The emerging “bottom-up” method may hold great potential to address these challenges, and focuses on fabricating microscale tissue building blocks with a specific microarchitecture and assembling these units to engineer larger tissue constructs from the bottom up. In this review, state-of-the-art methods for fabrication of three-dimensional biomimetic scaffolds are presented, and their advantages and drawbacks are discussed. The bottom-up methods used to assemble microscale building blocks (eg, microscale hydrogels) for tissue engineering are also reviewed. Finally, perspectives on future development of the bottom-up approach for tissue engineering are addressed.
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Affiliation(s)
- Tingli Lu
- Key Laboratory of Space Bioscience and Biotechnology, School of Life Science, Northwestern Polytechnical University, Xi'an, China.
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87
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Chondrogenic differentiation of menstrual blood-derived stem cells on nanofibrous scaffolds. Methods Mol Biol 2013; 1058:149-69. [PMID: 23592035 DOI: 10.1007/7651_2013_9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Cartilage tissue engineering is a promising technology to restore and repair cartilage lesions in the body. In recent years, significant advances have been made using stem cells as a cell source for clinical goals of cartilage tissue engineering. Menstrual blood-derived stem cells (MenSCs) is a novel population of stem cells that demonstrate the potential and differentiate into a wide range of tissues including the chondrogenic lineage. Incorporation of cell culture with extracellular matrix (ECM) like substratum plays an important role in cartilage tissue regeneration by providing attachment sites as well as bioactive signals for cells to grow and differentiate into chondrogenic lineage. The electrospun nanofibers are a class of polymer-based biomaterials that have been extensively utilized in tissue engineering as ECM-like scaffold. This chapter discusses potential of electrospun nanofibers for cell-based cartilage tissue engineering and presents detailed protocols on immunophenotyping characterization and chondrogenic differentiation of MenSCs seeded in poly-ε-caprolactone (PCL) nanofibers. The isolated MenSCs are characterized using flow cytometry, seeded on the nanofibers, imaged using scanning electron microscopy, and subsequently differentiated into chondrogenic lineage in culture medium containing specific growth factors and cytokines. Immunofluorescence and alcian blue staining are used to evaluate the development of seeded MenSCs in PCL nanofibrous scaffold into chondrogenic lineage.
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88
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Kim M, Hong B, Lee J, Kim SE, Kang SS, Kim YH, Tae G. Composite System of PLCL Scaffold and Heparin-Based Hydrogel for Regeneration of Partial-Thickness Cartilage Defects. Biomacromolecules 2012; 13:2287-98. [DOI: 10.1021/bm3005353] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mihye Kim
- School of Materials
Science and Engineering and Department of
Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, 500-712,
Korea
| | - Bohee Hong
- School of Materials
Science and Engineering and Department of
Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, 500-712,
Korea
| | - Jongman Lee
- School of Materials
Science and Engineering and Department of
Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, 500-712,
Korea
| | - Se Eun Kim
- College
of Veterinary
Medicine, Chonnam National University, Gwang-ju, 500-757, Korea
| | - Seong Soo Kang
- College
of Veterinary
Medicine, Chonnam National University, Gwang-ju, 500-757, Korea
| | - Young Ha Kim
- Department of Chemistry, Chung-Ang University, 221 Heukseok-dong,
Dongiak-gu, Seoul 156-755, Korea
| | - Giyoong Tae
- School of Materials
Science and Engineering and Department of
Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, 500-712,
Korea
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Abstract
Orthopedic surgeons and researchers worldwide are continuously faced with the challenge of regenerating articular cartilage defects. However, until now, it has not been possible to completely mimic the biological and biochemical properties of articular cartilage using current research and development approaches. In this review, biomaterials previously used for articular cartilage repair research are addressed. Furthermore, a brief discussion of the state of the art of current cell printing procedures mimicking native cartilage is offered in light of their use as future alternatives for cartilage tissue engineering. Inkjet cell printing, controlled deposition cell printing tools, and laser cell printing are cutting-edge techniques in this context. The development of mimetic hydrogels with specific biological properties relevant to articular cartilage native tissue will support the development of improved, functional, and novel engineered tissue for clinical application.
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Affiliation(s)
| | - Wolf Drescher
- Department of Orthopedics Surgery, RWTH Aachen University Hospital, Aachen, Germany
| | - Björn Rath
- Department of Orthopedics Surgery, RWTH Aachen University Hospital, Aachen, Germany
| | - Markus Tingart
- Department of Orthopedics Surgery, RWTH Aachen University Hospital, Aachen, Germany
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research, RWTH Aachen University Hospital, Aachen, Germany
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90
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Shi J, Zhang X, Zeng X, Zhu J, Pi Y, Zhou C, Ao Y. One-step articular cartilage repair: combination of in situ bone marrow stem cells with cell-free poly(L-lactic-co-glycolic acid) scaffold in a rabbit model. Orthopedics 2012; 35:e665-71. [PMID: 22588408 DOI: 10.3928/01477447-20120426-20] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Focal full-thickness articular cartilage defects are challenging to repair. The purpose of this study was to find a simple, effective 1-step articular cartilage repair method. Because stem cell niches produce a microenvironment for stem cell self-renewal, proliferation, and differentiation, we integrated in situ bone marrow stem cells with an implanted poly(L-lactic-co-glycolic acid) (PLLGA) scaffold. Marrow stem cells grew and proliferated on cell-free PLLGA scaffolds, which were evaluated by scanning electronic microscopy (SEM) and Cell Counting Kit-8 (Dojindo, Kumamoto, Japan). Twenty-seven rabbits (54 knees) with large cylinder femoral trochlear cartilage defects were created and repaired with microfracture and cell-free PLLGA scaffold implantation (group 1), microfracture (group 2), or cell-free PLLGA scaffold implantation (group 3).Outcomes were evaluated by magnetic resonance imaging, International Cartilage Repair Society scores, histology, and immunohistochemistry. The repair effects were better in group 1 than in groups 2 and 3. In group 1, hyaline-like cartilage formed at week 24. Magnetic resonance imaging showed homogeneous signals as the adjacent normal cartilage. Collagen type II and toluidine blue were stained positively as normal cartilage tissue, and the color and thickness of regenerated tissue were similar to surrounding normal tissue. The combination of microfracture and cell-free PLLGA scaffold implantation used endogenous marrow stem cells in situ and promoted hyaline-like cartilage regeneration rapidly and effectively.
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Affiliation(s)
- Junjun Shi
- Institute of Sports Medicine, Peking University Third Hospital, Beijing, China
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91
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Liu H, Wang S, Qi N. Controllable structure, properties, and degradation of the electrospun PLGA/PLA-blended nanofibrous scaffolds. J Appl Polym Sci 2012. [DOI: 10.1002/app.36757] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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92
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Zhang D, Tong A, Zhou L, Fang F, Guo G. Osteogenic differentiation of human placenta-derived mesenchymal stem cells (PMSCs) on electrospun nanofiber meshes. Cytotechnology 2012; 64:701-10. [PMID: 22526490 DOI: 10.1007/s10616-012-9450-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Accepted: 03/19/2012] [Indexed: 02/05/2023] Open
Abstract
Numerous challenges remain in the successful clinical translation of cell-based therapeutic studies for skeletal tissue repair, including appropriate cell sources and viable cell delivery systems. Poly(ethylene glycol)-poly(ε-caprolactone) (PEG-PCL) amphiphilic block copolymers have been extensively explored in microspheres preparation. Due to the introduction of hydrophilic PEG segments into PCL backbones, these copolymers have shown much more potentials in carrying protein, lipophilic drugs or genes than commonly used poly (ε-caprolactone) (PCL) and poly (lactic acid). The aim of this study is to investigate the attachment and osteogenic differentiation of human placenta derived mesenchymal stem cells (PMSCs) on PEG-PCL triblock copolymers nanofiber scaffolds. Here we demonstrated that PMSCs proliferate robustly and can be effectively differentiated into osteogenic-like cells on nanofiber scaffolds. This study provides evidence for the use of nanofiber scaffolds as an ideal supporting material for in vitro PMSCs culture and an in vivo cell delivery vehicle for bone repair.
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Affiliation(s)
- Dongmei Zhang
- State Key Laboratory of Biotherapy and Cancer Center West China Hospital, West China Medical School, Sichuan University, Chengdu, 610041, People's Republic of China
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93
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Xu W, He X, Sarvestani AS, Jabbari E. Effect of a low-molecular-weight cross-linkable macromer on electrospinning of poly(lactide-co-glycolide) fibers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 18:1369-85. [DOI: 10.1163/156856207782246821] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Weijie Xu
- a Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, Swearingen Engineering Center, Rm 2C11, University of South Carolina, Columbia, SC 29208, USA
| | - Xuezhong He
- b Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, Swearingen Engineering Center, Rm 2C11, University of South Carolina, Columbia, SC 29208, USA
| | - Alireza S. Sarvestani
- c Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, Swearingen Engineering Center, Rm 2C11, University of South Carolina, Columbia, SC 29208, USA
| | - Esmaiel Jabbari
- d Biomimetic Materials and Tissue Engineering Laboratories, Department of Chemical Engineering, Swearingen Engineering Center, Rm 2C11, University of South Carolina, Columbia, SC 29208, USA
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94
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Potential of engineering methodologies for the application to pharmaceutical research. Arch Pharm Res 2012; 35:299-309. [DOI: 10.1007/s12272-012-0209-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Revised: 11/14/2011] [Accepted: 11/15/2011] [Indexed: 01/19/2023]
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95
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Vasita R, Katti DS. Structural and functional characterization of proteins adsorbed on hydrophilized polylactide-co-glycolide microfibers. Int J Nanomedicine 2011; 7:61-71. [PMID: 22275823 PMCID: PMC3260951 DOI: 10.2147/ijn.s26453] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 11/24/2022] Open
Abstract
Background: Hydrophobic biopolymers such as polylactide-co-glycolide (PLGA, 85:15) have been extensively explored as scaffolding materials for tissue engineering applications. More recently, electrospun microfiber-based and nanofiber-based scaffolds of PLGA have received increased attention because they act as physical mimics of the fibrillar extracellular matrix. However, the hydrophobicity of the PLGA microfiber surface can limit its use in biomedical applications. Therefore, in a previous study, we fabricated Pluronic® F-108 (PF-108)-blended PLGA microfibrous scaffolds that alleviated the hydrophobicity associated with PLGA by enriching the surface of microfibers with the ethylene oxide units present in PF-108. Methods: In this study, we report the influence of the extent of surface enrichment of PLGA microfibers on their interaction with two model proteins, ie, bovine serum albumin (BSA) and lysozyme. BSA and lysozyme were adsorbed onto PLGA microfiber meshes (unmodified and modified) and studied for the amount, secondary structure conformation, and bioactivity of released protein. Results: Irrespective of the type of protein, PF-108-blended PLGA microfibers showed significantly greater protein adsorption and release than the unblended PLGA samples. However, in comparison with BSA, lysozyme showed a 7–9-fold increase in release. The Fourier transform infrared spectroscopy studies for secondary structure determination demonstrated that irrespective of type of microfiber surface (unblended or blended), adsorbed BSA and lysozyme did not show any significant change in secondary structure (α-helical content) as compared with BSA and/or lysozyme in the free powder state. Further, the bioactivity assay of lysozyme released from blended PLGA microfiber meshes demonstrated 80%–85% bioactivity, indicating that the process of adsorption did not significantly affect biological activity. Therefore, this study demonstrated that the decreased hydrophobicity of blended PLGA microfibrous meshes not only improved the amount of protein adsorbed (lysozyme and BSA) but also maintained the secondary structure and bioactivity of the adsorbed proteins. Conclusion: Modulating the hydrophobicity of PLGA via blending with PF-108 could be a viable strategy to improve its interaction with proteins and subsequent cell interaction in tissue engineering applications.
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Affiliation(s)
- Rajesh Vasita
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology, Kanpur, Uttar Pradesh, India
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96
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Dahlin RL, Kasper FK, Mikos AG. Polymeric nanofibers in tissue engineering. TISSUE ENGINEERING. PART B, REVIEWS 2011; 17:349-64. [PMID: 21699434 PMCID: PMC3179616 DOI: 10.1089/ten.teb.2011.0238] [Citation(s) in RCA: 195] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2011] [Accepted: 06/22/2011] [Indexed: 01/07/2023]
Abstract
Polymeric nanofibers can be produced using methods such as electrospinning, phase separation, and self-assembly, and the fiber composition, diameter, alignment, degradation, and mechanical properties can be tailored to the intended application. Nanofibers possess unique advantages for tissue engineering. The small diameter closely matches that of extracellular matrix fibers, and the relatively large surface area is beneficial for cell attachment and bioactive factor loading. This review will update the reader on the aspects of nanofiber fabrication and characterization important to tissue engineering, including control of porous structure, cell infiltration, and fiber degradation. Bioactive factor loading will be discussed with specific relevance to tissue engineering. Finally, applications of polymeric nanofibers in the fields of bone, cartilage, ligament and tendon, cardiovascular, and neural tissue engineering will be reviewed.
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Affiliation(s)
- Rebecca L Dahlin
- Department of Bioengineering, Rice University, Houston, Texas 77251-1892, USA
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97
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Tan J, Chua C, Leong K, Chian K, Leong W, Tan L. Esophageal tissue engineering: An in-depth review on scaffold design. Biotechnol Bioeng 2011; 109:1-15. [DOI: 10.1002/bit.23323] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 08/29/2011] [Accepted: 08/31/2011] [Indexed: 01/29/2023]
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98
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The influence of elastin-like recombinant polymer on the self-renewing potential of a 3D tissue equivalent derived from human lamina propria fibroblasts and oral epithelial cells. Biomaterials 2011; 32:5756-64. [DOI: 10.1016/j.biomaterials.2011.04.054] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 04/20/2011] [Indexed: 01/06/2023]
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99
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Shafiee A, Soleimani M, Chamheidari GA, Seyedjafari E, Dodel M, Atashi A, Gheisari Y. Electrospun nanofiber-based regeneration of cartilage enhanced by mesenchymal stem cells. J Biomed Mater Res A 2011; 99:467-78. [PMID: 21887742 DOI: 10.1002/jbm.a.33206] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 06/06/2011] [Accepted: 06/10/2011] [Indexed: 12/26/2022]
Abstract
Application of biomaterials in combination with stem cells is a novel tissue engineering approach to regenerate cartilage. The objective of this study was to investigate the potential of poly(vinyl alcohol)/polycaprolactone (PVA/PCL) nanofiber scaffolds seeded with rabbit bone marrow-mesenchymal stem cell (BM-MSC) for cartilage tissue engineering in vitro and in vivo. We tested the biocompatibility and mechanical properties of nanofibrous scaffolds using scanning electron microscope, MTT assay, and tensile measurements. The capacity of MSC for chondrogenic differentiation on scaffolds was examined using reverse transcription-polymer chain reaction and immunostaining. For in vivo assessments, PVA/PCL nanofiber scaffolds with or without MSC were implanted into rabbit full-thickness cartilage defects. To evaluate cartilage regeneration, semi-quantitative grading and histological analysis were performed. Our results showed that PVA/PCL scaffolds supported the proliferation and chondrogenic differentiation of MSC in vitro. Moreover, the animals treated with cell-seeded PVA/PCL scaffolds showed improved healing of defects compared with untreated control and those which received cell-free scaffolds. Our findings suggest that PVA/PCL scaffolds incorporated with MSC can serve as a suitable graft for articular cartilage reconstruction.
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Affiliation(s)
- Abbas Shafiee
- Stem Cell Biology, Nanotechnology and Tissue Engineering Departments, Stem Cell Technology Research Center, Tehran, Iran
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100
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Allaf RM, Rivero IV. Fabrication and characterization of interconnected porous biodegradable poly(ε-caprolactone) load bearing scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1843-1853. [PMID: 21670998 DOI: 10.1007/s10856-011-4367-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Accepted: 05/30/2011] [Indexed: 05/30/2023]
Abstract
In this study, poly(ε-caprolactone) (PCL)/poly(ethylene oxide) (PEO) (50:50 wt%) immiscible blend was used as a model system to investigate the feasibility of a novel solventless fabrication approach that combines cryomilling, compression molding and porogen leaching techniques to prepare interconnected porous scaffolds for tissue engineering. PCL was cryomilled with PEO to form blend powders. Compression molding was used to consolidate and anneal the cryomilled powders. Selective dissolution of the PEO with water resulted in interconnected porous scaffolds. Sodium chloride salt (NaCl) was subsequently added to cryomilled powder to increase the porosity of scaffolds. The prepared scaffolds had homogeneous pore structures, a porosity of ~50% which was increased by mixing salt with the blend (~70% for 60% wt% NaCl), and a compressive modulus and strength (ε = 10%) of 60 and 2.8 MPa, respectively. The results of the study confirm that this novel approach offers a viable alternative to fabricate scaffolds.
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Affiliation(s)
- Rula M Allaf
- Department of Industrial Engineering, Texas Tech University, Lubbock, TX 79409-3061, USA
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