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Xing F, Shen HY, Zhe M, Jiang K, Lei J, Xiang Z, Liu M, Xu JZ, Li ZM. Nano-Topographically Guided, Biomineralized, 3D-Printed Polycaprolactone Scaffolds with Urine-Derived Stem Cells for Promoting Bone Regeneration. Pharmaceutics 2024; 16:204. [PMID: 38399258 PMCID: PMC10892771 DOI: 10.3390/pharmaceutics16020204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/21/2024] [Accepted: 01/26/2024] [Indexed: 02/25/2024] Open
Abstract
Currently, biomineralization is widely used as a surface modification approach to obtain ideal material surfaces with complex hierarchical nanostructures, morphologies, unique biological functions, and categorized organizations. The fabrication of biomineralized coating for the surfaces of scaffolds, especially synthetic polymer scaffolds, can alter surface characteristics, provide a favorable microenvironment, release various bioactive substances, regulate the cellular behaviors of osteoblasts, and promote bone regeneration after implantation. However, the biomineralized coating fabricated by immersion in a simulated body fluid has the disadvantages of non-uniformity, instability, and limited capacity to act as an effective reservoir of bioactive ions for bone regeneration. In this study, in order to promote the osteoinductivity of 3D-printed PCL scaffolds, we optimized the surface biomineralization procedure by nano-topographical guidance. Compared with biomineralized coating constructed by the conventional method, the nano-topographically guided biomineralized coating possessed more mineral substances and firmly existed on the surface of scaffolds. Additionally, nano-topographically guided biomineralized coating possessed better protein adsorption and ion release capacities. To this end, the present work also demonstrated that nano-topographically guided biomineralized coating on the surface of 3D-printed PCL scaffolds can regulate the cellular behaviors of USCs, guide the osteogenic differentiation of USCs, and provide a biomimetic microenvironment for bone regeneration.
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Affiliation(s)
- Fei Xing
- Department of Orthopedic Surgery, Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China; (F.X.); (Z.X.)
| | - Hui-Yuan Shen
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; (H.-Y.S.); (K.J.); (J.L.); (Z.-M.L.)
| | - Man Zhe
- Animal Experiment Center, West China Hospital, Sichuan University, Chengdu 610041, China;
| | - Kai Jiang
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; (H.-Y.S.); (K.J.); (J.L.); (Z.-M.L.)
| | - Jun Lei
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; (H.-Y.S.); (K.J.); (J.L.); (Z.-M.L.)
| | - Zhou Xiang
- Department of Orthopedic Surgery, Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China; (F.X.); (Z.X.)
| | - Ming Liu
- Department of Orthopedic Surgery, Orthopedic Research Institute, Laboratory of Stem Cell and Tissue Engineering, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China; (F.X.); (Z.X.)
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; (H.-Y.S.); (K.J.); (J.L.); (Z.-M.L.)
| | - Zhong-Ming Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China; (H.-Y.S.); (K.J.); (J.L.); (Z.-M.L.)
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Zhang C, Zhou Z, Liu N, Chen J, Wu J, Zhang Y, Lin K, Zhang S. Osteogenic differentiation of 3D-printed porous tantalum with nano-topographic modification for repairing craniofacial bone defects. Front Bioeng Biotechnol 2023; 11:1258030. [PMID: 37671184 PMCID: PMC10475942 DOI: 10.3389/fbioe.2023.1258030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Accepted: 08/09/2023] [Indexed: 09/07/2023] Open
Abstract
Introduction: Congenital or acquired bone defects in the oral and cranio-maxillofacial (OCMF) regions can seriously affect the normal function and facial appearance of patients, and cause great harm to their physical and mental health. To achieve good bone defect repair results, the prosthesis requires good osteogenic ability, appropriate porosity, and precise three-dimensional shape. Tantalum (Ta) has better mechanical properties, osteogenic ability, and microstructure compared to Ti6Al4V, and has become a potential alternative material for bone repair. The bones in the OCMF region have unique shapes, and 3D printing technology is the preferred method for manufacturing personalized prosthesis with complex shapes and structures. The surface characteristics of materials, such as surface morphology, can affect the biological behavior of cells. Among them, nano-topographic surface modification can endow materials with unique surface properties such as wettability and large surface area, enhancing the adhesion of osteoblasts and thereby enhancing their osteogenic ability. Methods: This study used 3D-printed porous tantalum scaffolds, and constructed nano-topographic surface through hydrothermal treatment. Its osteogenic ability was verified through a series of in vitro and in vivo experiments. Results: The porous tantalum modified by nano-topographic surface can promote the proliferation and osteogenic differentiation of BMSCs, and accelerate the formation of new bone in the Angle of the mandible bone defect of rabbits. Discussion: It can be seen that 3D-printed nano-topographic surface modified porous tantalum has broad application prospects in the repair of OCMF bone defects.
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Affiliation(s)
- Chuxi Zhang
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Zhongwei Zhou
- Ningxia Key Laboratory of Oral Diseases Research, Department of Oral and Maxillofacial Surgery, General Hospital of Ningxia Medical University, Institute of Medical Sciences, Yinchuan, Ningxia, China
| | - Nian Liu
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jiangping Chen
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jinyang Wu
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yong Zhang
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Kaili Lin
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shilei Zhang
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral and Cranio-Maxillofacial Surgery, National Clinical Research Center, Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Taheri S, Ghazali ZS, Montazeri L, Ebrahim FA, Javadpour J, Kamguyan K, Thormann E, Renaud P, Bonakdar S. Engineered substrates incapable of induction of chondrogenic differentiation compared to the chondrocyte imprinted substrates. Biomed Mater 2023; 18. [PMID: 36693281 DOI: 10.1088/1748-605x/acb5d7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Accepted: 01/24/2023] [Indexed: 01/26/2023]
Abstract
It is well established that surface topography can affect cell functions. However, finding a reproducible and reliable method for regulating stem cell behavior is still under investigation. It has been shown that cell imprinted substrates contain micro- and nanoscale structures of the cell membrane that serve as hierarchical substrates, can successfully alter stem cell fate. This study investigated the effect of the overall cell shape by fabricating silicon wafers containing pit structure in the average size of spherical-like chondrocytes using photolithography technique. We also used chondrocyte cell line (C28/I2) with spindle-like shape to produce cell imprinted substrates. The effect of all substrates on the differentiation of adipose-derived mesenchymal stem cells (ADSCs) has been studied. The AFM and scanning electron microscopy images of the prepared substrates demonstrated that the desired shapes were successfully transferred to the substrates. Differentiation of ADSCs was investigated by immunostaining for mature chondrocyte marker, collagen II, and gene expression of collagen II, Sox9, and aggrecan markers. C28/I2 imprinted substrate could effectively enhanced chondrogenic differentiation compared to regular pit patterns on the wafer. It can be concluded that cell imprinted substrates can induce differentiation signals better than engineered lithographic substrates. The nanostructures on the cell-imprinted patterns play a crucial role in harnessing cell fate. Therefore, the patterns must include the nano-topographies to have reliable and reproducible engineered substrates.
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Affiliation(s)
- Shiva Taheri
- National Cell Bank Department, Iran Pasteur Institute, Tehran, Iran.,School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Zahra Sadat Ghazali
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Leila Montazeri
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | | | - Jafar Javadpour
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Khorshid Kamguyan
- Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Esben Thormann
- Department of Chemistry, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Philippe Renaud
- STI-IMT-LMIS4, École Polytechnique Fédérale de Lausanne, Station 17, 1015 Lausanne, Switzerland
| | - Shahin Bonakdar
- National Cell Bank Department, Iran Pasteur Institute, Tehran, Iran
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Yang Q, Miao Y, Campanello LJ, Hourwitz MJ, Abubaker-Sharif B, Bull AL, Devreotes PN, Fourkas JT, Losert W. Cortical waves mediate the cellular response to electric fields. eLife 2022; 11:73198. [PMID: 35318938 PMCID: PMC8942472 DOI: 10.7554/elife.73198] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 03/08/2022] [Indexed: 11/13/2022] Open
Abstract
Electrotaxis, the directional migration of cells in a constant electric field, is important in regeneration, development, and wound healing. Electrotaxis has a slower response and a smaller dynamic range than guidance by other cues, suggesting that the mechanism of electrotaxis shares both similarities and differences with chemical-gradient-sensing pathways. We examine a mechanism centered on the excitable system consisting of cortical waves of biochemical signals coupled to cytoskeletal reorganization, which has been implicated in random cell motility. We use electro-fused giant Dictyostelium discoideum cells to decouple waves from cell motion and employ nanotopographic surfaces to limit wave dimensions and lifetimes. We demonstrate that wave propagation in these cells is guided by electric fields. The wave area and lifetime gradually increase in the first 10 min after an electric field is turned on, leading to more abundant and wider protrusions in the cell region nearest the cathode. The wave directions display 'U-turn' behavior upon field reversal, and this switch occurs more quickly on nanotopography. Our results suggest that electric fields guide cells by controlling waves of signal transduction and cytoskeletal activity, which underlie cellular protrusions. Whereas surface receptor occupancy triggers both rapid activation and slower polarization of signaling pathways, electric fields appear to act primarily on polarization, explaining why cells respond to electric fields more slowly than to other guidance cues.
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Affiliation(s)
- Qixin Yang
- Department of Physics, University of Maryland, College Park, United States.,Institute for Physical Science and Technology, University of Maryland, College Park, United States
| | - Yuchuan Miao
- Department of Cell Biology, Johns Hopkins University, Baltimore, United States
| | - Leonard J Campanello
- Department of Physics, University of Maryland, College Park, United States.,Institute for Physical Science and Technology, University of Maryland, College Park, United States
| | - Matt J Hourwitz
- Department of Chemistry & Biochemistry, University of Maryland, College Park, United States
| | | | - Abby L Bull
- Department of Physics, University of Maryland, College Park, United States.,Institute for Physical Science and Technology, University of Maryland, College Park, United States
| | - Peter N Devreotes
- Department of Cell Biology, Johns Hopkins University, Baltimore, United States
| | - John T Fourkas
- Institute for Physical Science and Technology, University of Maryland, College Park, United States.,Department of Chemistry & Biochemistry, University of Maryland, College Park, United States
| | - Wolfgang Losert
- Department of Physics, University of Maryland, College Park, United States.,Institute for Physical Science and Technology, University of Maryland, College Park, United States
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Lee MK, Lee H, Kim HE, Lee EJ, Jang TS, Jung HD. Nano-Topographical Control of Ti-Nb-Zr Alloy Surfaces for Enhanced Osteoblastic Response. Nanomaterials (Basel) 2021; 11:1507. [PMID: 34200329 DOI: 10.3390/nano11061507] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/27/2021] [Accepted: 06/02/2021] [Indexed: 12/17/2022]
Abstract
Nano-scale surface roughening of metallic bio-implants plays an important role in the clinical success of hard tissue reconstruction and replacement. In this study, the nano-topographical features of titanium-niobium-zirconium (TNZ) alloy surfaces were controlled by using the target-ion induced plasma sputtering (TIPS) technique to improve the in vitro osteoblastic response. The TIPS technique is a novel strategy for etching the surface of metallic bio-implants using bombardment of target metal cations, which were accelerated by an extremely high negative bias voltage applied to the substrates. The nano-topography of the TNZ surfaces was successfully controlled by modulating experimental variables (such as the ion etching energy and the type of substrate or target materials) of TIPS. As a result, various nanopatterns (size: 10–210 nm) were fabricated on the surface of the TNZ alloys. Compared with the control group, experimental groups with nanopattern widths of ≥130 nm (130 and 210 nm groups) exhibited superior cell adhesion, proliferation, and differentiation. Our findings demonstrate that TIPS is a promising technology that can impart excellent biological functions to the surface of metallic bio-implants.
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Ferraris S, Warchomicka F, Barberi J, Cochis A, Scalia AC, Spriano S. Contact Guidance Effect and Prevention of Microfouling on a Beta Titanium Alloy Surface Structured by Electron-Beam Technology. Nanomaterials (Basel) 2021; 11:1474. [PMID: 34199432 DOI: 10.3390/nano11061474] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 02/06/2023]
Abstract
Nano- and micro-structuring of implantable materials constitute a promising approach to introduce mechanical contact guidance effect, drive cells colonization, as well as to prevent bacteria adhesion and biofilm aggregation, through antifouling topography. Accordingly, this paper aims to extend the application of e-beam surface texturing and nano-structuring to the beta titanium alloys, which are of great interest for biomedical implants because of the low Young modulus and the reduction of the stress shielding effect. The paper shows that surface texturing on the micro-scale (micro-grooves) is functional to a contact guidance effect on gingival fibroblasts. Moreover, nano-structuring, derived from the e-beam surface treatment, is effective to prevent microfouling. In fact, human fibroblasts were cultivated directly onto grooved specimens showing to sense the surface micro-structure thus spreading following the grooves’ orientation. Moreover, Staphylococcus aureus colonies adhesion was prevented by the nano-topographies in comparison to the mirror-polished control, thus demonstrating promising antifouling properties. Furthermore, the research goes into detail to understand the mechanism of microfouling prevention due to nano-topography and microstructure.
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Yang CW, Wang GK. Effect of Hydrothermal (Sr)-Hydroxyapatite Coatings on the Corrosion Resistance and Mg 2+ Ion Release to Enhance Osteoblastic Cell Responses of AZ91D Alloy. Materials (Basel) 2020; 13:E591. [PMID: 32012748 DOI: 10.3390/ma13030591] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/20/2020] [Accepted: 01/22/2020] [Indexed: 11/17/2022]
Abstract
The biomedical applications of Mg-based alloys are limited by their rapid corrosion rate in the body fluid. In this study, the hydrothermal synthesis is employed to produce protective bioactive hydroxyapatite coating (HAC) and strontium-substituted hydroxyapatite coating (Sr-HAC) to further enhance the corrosion resistance and in vitro biocompatibility of biodegradable AZ91D Mg alloy in physiological environments. For comparison, the brucite Mg(OH)2 prepared by the alkaline pre-treatment is designated as a control group. Experimental evidences of XRD and XPS analysis confirm that Sr2+ ions can be incorporated into HA crystal structure. It is noted that the hydrothermally synthesized Sr-HAC conversion coating composed of a specific surface topography with the nanoscaled flake-like fine crystallites is constructed on the AZ91D Mg alloy. The hydrophilicity of Mg substrate is effectively enhanced with the decrease in static contact angles after performing alkaline and hydrothermal treatments. Potentiodynamic polarization measurements reveal that the nanostructured Sr-HAC-coated specimens exhibit superior corrosion resistance than HAC and alkaline pre-treated Mg(OH)2. Moreover, immersion tests demonstrate that Sr-HAC provides favorable long-term stability for the Mg alloy with decreasing concentration of released Mg2+ ions in the SBF and the reduced corrosion rate during the immersion length of 30 days. The cells cultured on Sr-HAC specimens exhibit higher viability than those on the alkaline-pre-treated Mg(OH)2 and HAC specimens. The Sr-substituted HA coating with a nanostructured surface topography can help to stimulate the cell viability of osteoblastic cells.
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Onesto V, Accardo A, Vieu C, Gentile F. Small-world networks of neuroblastoma cells cultured in three-dimensional polymeric scaffolds featuring multi-scale roughness. Neural Regen Res 2020; 15:759-768. [PMID: 31638101 PMCID: PMC6975141 DOI: 10.4103/1673-5374.266923] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Understanding the mechanisms underlying cell-surface interaction is of fundamental importance for the rational design of scaffolds aiming at tissue engineering, tissue repair and neural regeneration applications. Here, we examined patterns of neuroblastoma cells cultured in three-dimensional polymeric scaffolds obtained by two-photon lithography. Because of the intrinsic resolution of the technique, the micrometric cylinders composing the scaffold have a lateral step size of ~200 nm, a surface roughness of around 20 nm, and large values of fractal dimension approaching 2.7. We found that cells in the scaffold assemble into separate groups with many elements per group. After cell wiring, we found that resulting networks exhibit high clustering, small path lengths, and small-world characteristics. These values of the topological characteristics of the network can potentially enhance the quality, quantity and density of information transported in the network compared to equivalent random graphs of the same size. This is one of the first direct observations of cells developing into 3D small-world networks in an artificial matrix.
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Affiliation(s)
- Valentina Onesto
- Center for Advanced Biomaterials for Healthcare, Italian Institute of Technology, Naples, Italy
| | - Angelo Accardo
- Laboratoire d'Analyse et d'Architecture des Systemes (LAAS), Centre National de la Recherche Scientifique, Universite de Toulouse, CNRS, Toulouse, France; Current address: Department of Precision and Microsystems Engineering, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands
| | - Christophe Vieu
- Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), Centre National de la Recherche Scientifique, Université de Toulouse, CNRS; Institut National des Sciences Appliquées - INSA, Toulouse, France
| | - Francesco Gentile
- Department of Electric Engineering and Information Technology, University Federico II, Naples, Italy
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Reinwald Y, El Haj AJ. Hydrostatic pressure in combination with topographical cues affects the fate of bone marrow-derived human mesenchymal stem cells for bone tissue regeneration. J Biomed Mater Res A 2018; 106:629-640. [PMID: 28984025 PMCID: PMC5813264 DOI: 10.1002/jbm.a.36267] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 09/13/2017] [Accepted: 09/18/2017] [Indexed: 12/16/2022]
Abstract
Topographical and mechanical cues are vital for cell fate, tissue development in vivo, and to mimic the native cell growth environment in vitro. To date, the combinatory effect of mechanical and topographical cues as not been thoroughly investigated. This study investigates the effect of PCL nanofiber alignment and hydrostatic pressure on stem cell differentiation for bone tissue regeneration. Bone marrow-derived human mesenchymal stem cells were seeded onto standard tissue culture plastic and electrospun random and aligned nanofibers. These substrates were either cultured statically or subjected to intermittent hydrostatic pressure at 270 kPa, 1 Hz for 60 min daily over 21 days in osteogenic medium. Data revealed higher cell metabolic activities for all mechanically stimulated cell culture formats compared with non-stimulated controls; and random fibers compared with aligned fibers. Fiber orientation influenced cell morphology and patterns of calcium deposition. Significant up-regulation of Collagen-I, ALP, and Runx-2 were observed for random and aligned fibers following mechanical stimulation; highest levels of osteogenic markers were expressed when hydrostatic pressure was applied to random fibers. These results indicate that fiber alignment and hydrostatic pressure direct stem cell fate and are important stimulus for tissue regeneration. © 2017 The Authors Journal of Biomedical Materials Research Part A Published by Wiley Periodicals, Inc. J Biomed Mater Res Part A: A: 629-640, 2018.
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Affiliation(s)
- Yvonne Reinwald
- Institute of Science and Technology in Medicine, Keele University, Medical School, Guy Hilton Research Centre, UHNMStoke‐on‐TrentUnited Kingdom
- Department of Engineering, School of Science and TechnologyNottingham Trent UniversityNottinghamUnited Kingdom
| | - Alicia J. El Haj
- Institute of Science and Technology in Medicine, Keele University, Medical School, Guy Hilton Research Centre, UHNMStoke‐on‐TrentUnited Kingdom
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Smith LL, Niziolek PJ, Haberstroh KM, Nauman EA, Webster TJ. Decreased fibroblast and increased osteoblast adhesion on nanostructured NaOH-etched PLGA scaffolds. Int J Nanomedicine 2007; 2:383-8. [PMID: 18019837 PMCID: PMC2676656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
To facilitate locomotion and support the body, the skeleton relies on the transmission of forces between muscles and bones through complex junctions called entheses. The varying mechanical and biological properties of the enthesis make healing this avascular tissue difficult; hence the need for an engineered alternative. Cells in situ interact with their environment on the nano-scale which suggests that engineered approaches to enthesis regeneration should include such biologically-inspired nano-scale surface features. The present in vitro study investigated the effects of etching poly-lactic-co-glycolic acid (PLGA) scaffolds to produce nano-topography on the adhesion of fibroblasts and osteoblasts, two integral enthesis cell types. Nano-topography was produced on PLGA by etching the scaffolds in NaOH. Results showed that etching PLGA with NaOH to create nano-scale surface features decreased fibroblast adhesion while it increased osteoblast adhesion; criteria critical for the spatial control of osteoblast and fibroblast adhesion for a successful enthesis tissue engineering material. Thus, the results of this study showed for the first time collective evidence that PLGA can be either treated with NaOH or not on ends of an enthesis tissue engineering construct to spatially increase osteoblast and fibroblast adhesion, respectively.
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Affiliation(s)
- Lester L Smith
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indianapolis, IN, USA
| | - Paul J Niziolek
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Karen M Haberstroh
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indianapolis, IN, USA
- Division of Engineering, Brown University, Providence, RI, USA
| | - Eric A Nauman
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indianapolis, IN, USA
- School of Mechanical Engineering, Purdue University, West Lafayette, Indianapolis, IN, USA
- Department of Basic Medical Sciences, Purdue University, West Lafayette, Indianapolis, IN, USA
| | - Thomas J Webster
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indianapolis, IN, USA
- Division of Engineering, Brown University, Providence, RI, USA
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