251
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Casanova MR, Reis RL, Martins A, Neves NM. The Use of Electrospinning Technique on Osteochondral Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1058:247-263. [PMID: 29691825 DOI: 10.1007/978-3-319-76711-6_11] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Electrospinning, an electrostatic fiber fabrication technique, has attracted significant interest in recent years due to its versatility and ability to produce highly tunable nanofibrous meshes. These nanofibrous meshes have been investigated as promising tissue engineering scaffolds since they mimic the scale and morphology of the native extracellular matrix. The sub-micron diameter of fibers produced by this process presents various advantages like the high surface area to volume ratio, tunable porosity, and the ability to manipulate the nanofiber composition in order to get desired properties and functionality. Electrospun fibers can be oriented or arranged randomly, giving control over both mechanical properties and the biological response to the fibrous scaffold. Moreover, bioactive molecules can be integrated with the electrospun nanofibrous scaffolds in order to improve the cellular response. This chapter presents an overview of the developments on electrospun polymer nanofibers including processing, structure, and their applications in the field of osteochondral tissue engineering.
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Affiliation(s)
- Marta R Casanova
- 3B's Research Group-Biomaterials, Biodegradable and Biomimetics, Avepark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco/Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group-Biomaterials, Biodegradable and Biomimetics, Avepark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco/Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Albino Martins
- 3B's Research Group-Biomaterials, Biodegradable and Biomimetics, Avepark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco/Guimarães, Portugal.,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Nuno M Neves
- 3B's Research Group-Biomaterials, Biodegradable and Biomimetics, Avepark-Parque de Ciência e Tecnologia, Zona Industrial da Gandra, Barco/Guimarães, Portugal. .,ICVS/3B's-PT Government Associate Laboratory, Braga/Guimarães, Portugal.
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252
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Ivanova AA, Syromotina DS, Shkarina S, Shkarin R, Cecilia A, Weinhardt V, Baumbach T, Saveleva MS, Gorin DA, Douglas TEL, Parakhonskiy BV, Skirtach AG, Cools P, De Geyter N, Morent R, Oehr C, Surmeneva MA, Surmenev RA. Effect of low-temperature plasma treatment of electrospun polycaprolactone fibrous scaffolds on calcium carbonate mineralisation. RSC Adv 2018; 8:39106-39114. [PMID: 35558295 PMCID: PMC9090650 DOI: 10.1039/c8ra07386d] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/14/2018] [Indexed: 11/21/2022] Open
Abstract
This article reports on a study of the mineralisation behaviour of CaCO3 deposited on electrospun poly(ε-caprolactone) (PCL) scaffolds preliminarily treated with low-temperature plasma. This work was aimed at developing an approach that improves the wettability and permeability of PCL scaffolds in order to obtain a superior composite coated with highly porous CaCO3, which is a prerequisite for biomedical scaffolds used for drug delivery. Since PCL is a synthetic polymer that lacks functional groups, plasma processing of PCL scaffolds in O2, NH3, and Ar atmospheres enables introduction of highly reactive chemical groups, which influence the interaction between organic and inorganic phases and govern the nucleation, crystal growth, particle morphology, and phase composition of the CaCO3 coating. Our studies showed that the plasma treatment induced the formation of O- and N-containing polar functional groups on the scaffold surface, which caused an increase in the PCL surface hydrophilicity. Mineralisation of the PCL scaffolds was performed by inducing precipitation of CaCO3 particles on the surface of polymer fibres from a mixture of CaCl2- and Na2CO3-saturated solutions. The presence of highly porous vaterite and nonporous calcite crystal phases in the obtained coating was established. Our findings confirmed that preferential growth of the vaterite phase occurred in the O2-plasma-treated PCL scaffold and that the coating formed on this scaffold was smoother and more homogenous than those formed on the untreated PCL scaffold and the Ar- and NH3-plasma-treated PCL scaffolds. A more detailed three-dimensional assessment of the penetration depth of CaCO3 into the PCL scaffold was performed by high-resolution micro-computed tomography. The assessment revealed that O2-plasma treatment of the PCL scaffold caused CaCO3 to nucleate and precipitate much deeper inside the porous structure. From our findings, we conclude that O2-plasma treatment is preferable for PCL scaffold surface modification from the viewpoint of use of the PCL/CaCO3 composite as a drug delivery platform for tissue engineering. This article reports on a study of the mineralisation behaviour of CaCO3 deposited on electrospun poly(ε-caprolactone) (PCL) scaffolds preliminarily treated with low-temperature plasma.![]()
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253
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Budhwani KI, Oliver PG, Buchsbaum DJ, Thomas V. Novel Biomimetic Microphysiological Systems for Tissue Regeneration and Disease Modeling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1077:87-113. [PMID: 30357685 DOI: 10.1007/978-981-13-0947-2_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Biomaterials engineered to closely mimic morphology, architecture, and nanofeatures of naturally occurring in vivo extracellular matrices (ECM) have gained much interest in regenerative medicine and in vitro biomimetic platforms. Similarly, microphysiological systems (MPS), such as lab-chip, have drummed up momentum for recapitulating precise biomechanical conditions to model the in vivo microtissue environment. However, porosity of in vivo scaffolds regulating barrier and interface functions is generally absent in lab-chip systems, or otherwise introduces considerable cost, complexity, and an unrealistic uniformity in pore geometry. We address this by integrating electrospun nanofibrous porous scaffolds in MPS to develop the lab-on-a-brane (LOB) MPS for more effectively modeling transport, air-liquid interface, and tumor progression and for personalized medicine applications.
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Affiliation(s)
- Karim I Budhwani
- Departments of Radiation Oncology and Materials Science & Engineering, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Patsy G Oliver
- Department of Radiation Oncology, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Donald J Buchsbaum
- Department of Radiation Oncology, The University of Alabama at Birmingham, Birmingham, AL, USA
| | - Vinoy Thomas
- Department of Materials Science & Engineering, The University of Alabama at Birmingham, Birmingham, AL, USA.
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254
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Ali Z, Islam A, Sherrell P, Le-Moine M, Lolas G, Syrigos K, Rafat M, Jensen LD. Adjustable delivery of pro-angiogenic FGF-2 by collagen-alginate microspheres. Biol Open 2018; 7:bio.027060. [PMID: 29449216 PMCID: PMC5898261 DOI: 10.1242/bio.027060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Therapeutic induction of blood vessel growth (angiogenesis) in ischemic tissues holds great potential for treatment of myocardial infarction and stroke. Achieving sustained angiogenesis and vascular maturation has, however, been highly challenging. Here, we demonstrate that alginate:collagen hydrogels containing therapeutic, pro-angiogenic FGF-2, and formulated as microspheres, is a promising and clinically relevant vehicle for therapeutic angiogenesis. By titrating the amount of readily dissolvable and degradable collagen with more slowly degradable alginate in the hydrogel mixture, the degradation rates of the biomaterial controlling the release kinetics of embedded pro-angiogenic FGF-2 can be adjusted. Furthermore, we elaborate a microsphere synthesis protocol allowing accurate control over sphere size, also a critical determinant of degradation/release rate. As expected, alginate:collagen microspheres were completely biocompatible and did not cause any adverse reactions when injected in mice. Importantly, the amount of pro-angiogenic FGF-2 released from such microspheres led to robust induction of angiogenesis in zebrafish embryos similar to that achieved by injecting FGF-2-releasing cells. These findings highlight the use of microspheres constructed from alginate:collagen hydrogels as a promising and clinically relevant delivery system for pro-angiogenic therapy. Summary: The development of alginate:collagen composite hydrogel microspheres of adjustable size and degradation speed is described as a new platform for delivery of pro-angiogenic FGF-2 or pro-angiogenic cells.
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Affiliation(s)
- Zaheer Ali
- Department of Medical and Health Sciences, Division of Cardiovascular Medicine, Linköping University, Linköping, Sweden
| | - Anik Islam
- Department of Medical and Health Sciences, Division of Cardiovascular Medicine, Linköping University, Linköping, Sweden
| | - Peter Sherrell
- Department of Materials, Faculty of Engineering, Imperial College London, London, UK
| | - Mark Le-Moine
- Department of Biomedical Engineering, Linkoping University, Linköping, Sweden
| | - Georgios Lolas
- Oncology Unit, 3rd Department of Medicine, “Sotiria” General Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Konstantinos Syrigos
- Oncology Unit, 3rd Department of Medicine, “Sotiria” General Hospital, National and Kapodistrian University of Athens, Athens, Greece
| | - Mehrdad Rafat
- Department of Biomedical Engineering, Linkoping University, Linköping, Sweden
| | - Lasse D. Jensen
- Department of Medical and Health Sciences, Division of Cardiovascular Medicine, Linköping University, Linköping, Sweden
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255
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Burugapalli K, Wijesuriya S, Wang N, Song W. Biomimetic electrospun coatings increase the in vivo sensitivity of implantable glucose biosensors. J Biomed Mater Res A 2017; 106:1072-1081. [PMID: 29226509 PMCID: PMC5826864 DOI: 10.1002/jbm.a.36308] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 10/13/2017] [Accepted: 12/05/2017] [Indexed: 12/05/2022]
Abstract
In vivo tissue responses and functional efficacy of electrospun membranes based on polyurethane (PU) and gelatin (GE) as biomimetic coatings for implantable glucose biosensors was investigated in a rat subcutaneous implantation model. Three electrospun membranes with optimized fiber diameters, pore sizes, and permeability, both single PU and coaxial PU‐GE fibers and a solvent cast PU film were implanted in rats to evaluate tissue responses. For functional efficacy testing, four sensor variants coated with the above mentioned electrospun membranes as mass‐transport limiting and outermost biomimetic coatings were implanted in rats. The electrospun PU membranes had micron sized pores that were not permeable to host cells when implanted in the body. However, PU‐GE coaxial fiber membranes, having similar sized pores, were infiltrated with fibroblasts that deposited collagen in the membrane's pores. Such tissue response prevented the formation of dense fibrous capsule around the sensor coated with the PU‐GE coaxial fiber membranes, which helped improve the in vivo sensitivity for at least 3 weeks compared to the traditional sensors in rat subcutaneous tissue. Furthermore, the better in vitro sensor's sensitivity due to electrospun PU as the mass‐transport limiting membrane translated to better in vivo sensitivity. Thus, this study showed that electrospun membranes can play an important role in realizing long in vivo sensing lifetime of implantable glucose biosensors. © 2017 The Authors Journal of Biomedical Materials Research Part A Published by Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1072–1081, 2018.
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Affiliation(s)
- Krishna Burugapalli
- Biomedical Engineering Theme, Institute for Environment, Health and Societies, Brunel University London, Uxbridge, UB8 3PH, United Kingdom.,Department of Mechanical, Aerospace and Civil Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge, UB8 3PH, United Kingdom
| | - Shavini Wijesuriya
- Biomedical Engineering Theme, Institute for Environment, Health and Societies, Brunel University London, Uxbridge, UB8 3PH, United Kingdom.,Department of Mechanical, Aerospace and Civil Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge, UB8 3PH, United Kingdom
| | - Ning Wang
- Biomedical Engineering Theme, Institute for Environment, Health and Societies, Brunel University London, Uxbridge, UB8 3PH, United Kingdom.,Department of Mechanical, Aerospace and Civil Engineering, College of Engineering, Design and Physical Sciences, Brunel University London, Uxbridge, UB8 3PH, United Kingdom
| | - Wenhui Song
- UCL Centre for Nanotechnology and Regenerative Medicine, Division of Surgery and Interventional Science, University College London, London, NW3 2PF, United Kingdom
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256
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Naghizadeh F, Solouk A, Khoulenjani SB. Osteochondral scaffolds based on electrospinning method: General review on new and emerging approaches. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1393682] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Farnaz Naghizadeh
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Atefeh Solouk
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Shadab Bagheri Khoulenjani
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
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257
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Baudequin T, Gaut L, Mueller M, Huepkes A, Glasmacher B, Duprez D, Bedoui F, Legallais C. The Osteogenic and Tenogenic Differentiation Potential of C3H10T1/2 (Mesenchymal Stem Cell Model) Cultured on PCL/PLA Electrospun Scaffolds in the Absence of Specific Differentiation Medium. MATERIALS 2017; 10:ma10121387. [PMID: 29207566 PMCID: PMC5744322 DOI: 10.3390/ma10121387] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 11/27/2017] [Accepted: 11/29/2017] [Indexed: 12/21/2022]
Abstract
The differentiation potential of mesenchymal stem cells (MSC) has been extensively tested on electrospun scaffolds. However, this potential is often assessed with lineage-specific medium, making it difficult to interpret the real contribution of the properties of the scaffold in the cell response. In this study, we analyzed the ability of different polycaprolactone/polylactic acid PCL/PLA electrospun scaffolds (pure or blended compositions, random or aligned fibers, various fiber diameters) to drive MSC towards bone or tendon lineages in the absence of specific differentiation medium. C3H10T1/2 cells (a mesenchymal stem cell model) were cultured on scaffolds for 96 h without differentiation factors. We performed a cross-analysis of the cell–scaffold interactions (spreading, organization, and specific gene expression) with mechanical (elasticity), morphological (porosity, fibers diameter and orientation) and surface (wettability) characterizations of the electrospun fibers. We concluded that (1) osteogenic differentiation can be initiated on pure PCL-based electrospun scaffolds without specific culture conditions; (2) fiber alignment modified cell organization in the short term and (3) PLA added to PCL with an increased fiber diameter encouraged the stem cells towards the tendon lineage without additional tenogenic factors. In summary, the differentiation potential of stem cells on adapted electrospun fibers could be achieved in factor-free medium, making possible future applications in clinically relevant situations.
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Affiliation(s)
- Timothée Baudequin
- CNRS, UMR 7338 Biomechanics and Bioengineering, Sorbonne Universités, Université de Technologie de Compiègne, 60200 Compiègne, France.
| | - Ludovic Gaut
- CNRS UMR 7622 IBPS-Developmental Biology Laboratory, Sorbonne Universités, UPMC Univ Paris 06, F-75005 Paris, France.
- Inserm U1156, F-75005 Paris, France.
| | - Marc Mueller
- Institute for Multiphase Processes, Leibniz Universität Hanover, D-30167 Hanover, Germany.
| | - Angela Huepkes
- CNRS, UMR 7338 Biomechanics and Bioengineering, Sorbonne Universités, Université de Technologie de Compiègne, 60200 Compiègne, France.
- Institute for Multiphase Processes, Leibniz Universität Hanover, D-30167 Hanover, Germany.
| | - Birgit Glasmacher
- Institute for Multiphase Processes, Leibniz Universität Hanover, D-30167 Hanover, Germany.
| | - Delphine Duprez
- CNRS UMR 7622 IBPS-Developmental Biology Laboratory, Sorbonne Universités, UPMC Univ Paris 06, F-75005 Paris, France.
- Inserm U1156, F-75005 Paris, France.
| | - Fahmi Bedoui
- CNRS, UMR 7337 Roberval Laboratory for Mechanics, Sorbonne Universités, Université de Technologie de Compiègne, 60200 Compiègne, France.
| | - Cécile Legallais
- CNRS, UMR 7338 Biomechanics and Bioengineering, Sorbonne Universités, Université de Technologie de Compiègne, 60200 Compiègne, France.
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258
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Kwon DY, Park JH, Jang SH, Park JY, Jang JW, Min BH, Kim W, Lee HB, Lee J, Kim MS. Bone regeneration by means of a three‐dimensional printed scaffold in a rat cranial defect. J Tissue Eng Regen Med 2017; 12:516-528. [DOI: 10.1002/term.2532] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Revised: 07/18/2017] [Accepted: 07/27/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Doo Yeon Kwon
- Department of Molecular Science and TechnologyAjou University Suwon Korea
| | - Ji Hoon Park
- Department of Molecular Science and TechnologyAjou University Suwon Korea
| | - So Hee Jang
- Department of Molecular Science and TechnologyAjou University Suwon Korea
- Nature‐Inspired Mechanical System TeamKorea Institute of Machinery and Materials Daejeon Korea
| | - Joon Yeong Park
- Department of Molecular Science and TechnologyAjou University Suwon Korea
| | | | - Byoung Hyun Min
- Department of Molecular Science and TechnologyAjou University Suwon Korea
| | - Wan‐Doo Kim
- Nature‐Inspired Mechanical System TeamKorea Institute of Machinery and Materials Daejeon Korea
| | - Hai Bang Lee
- Department of Molecular Science and TechnologyAjou University Suwon Korea
| | - Junhee Lee
- Nature‐Inspired Mechanical System TeamKorea Institute of Machinery and Materials Daejeon Korea
| | - Moon Suk Kim
- Department of Molecular Science and TechnologyAjou University Suwon Korea
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259
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Wu S, Peng H, Li X, Streubel PN, Liu Y, Duan B. Effect of scaffold morphology and cell co-culture on tenogenic differentiation of HADMSC on centrifugal melt electrospun poly (L‑lactic acid) fibrous meshes. Biofabrication 2017; 9:044106. [PMID: 29134948 PMCID: PMC5849472 DOI: 10.1088/1758-5090/aa8fb8] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Engineered tendon grafts offer a promising alternative for grafting during the reconstruction of complex tendon tears. The tissue-engineered tendon substitutes have the advantage of increased biosafety and the option to customize their biochemical and biophysical properties to promote tendon regeneration. In this study, we developed a novel centrifugal melt electrospinning (CME) technique, with the goal of optimizing the fabrication parameters to generate fibrous scaffolds for tendon tissue engineering. The effects of CME processing parameters, including rotational speed, voltage, and temperature, on fiber properties (i.e. orientation, mean diameter, and productivity) were systematically investigated. By using this solvent-free and environmentally friendly method, we fabricated both random and aligned poly (L-lactic acid) (PLLA) fibrous scaffolds with controllable mesh thickness. We also investigated and compared their morphology, surface hydrophilicity, and mechanical properties. We seeded human adipose derived mesenchymal stem cells (HADMSC) on various PLLA fibrous scaffolds and conditioned the constructs in tenogenic differentiation medium for up to 21 days, to investigate the effects of fiber alignment and scaffold thickness on cell behavior. Aligned fibrous scaffolds induced cell elongation and orientation through a contact guidance phenomenon and promoted HADMSC proliferation and differentiation towards tenocytes. At the early stage, thinner scaffolds were beneficial for HADMSC proliferation, but the scaffold thickness had no significant effects on cell proliferation for longer-term cell culture. We further co-seeded HADMSC and human umbilical vein endothelial cells (HUVEC) on aligned PLLA fibrous mats and determined how the vascularization affected HADMSC tenogenesis. We found that co-cultured HADMSC-HUVEC expressed more tendon-related markers on the aligned fibrous scaffold. The co-culture systems promoted in vitro HADMSC differentiation towards tenocytes. These aligned fibrous scaffolds fabricated by CME technique could potentially be utilized to repair and regenerate tendon defects and injuries with cell co-culture and controlled vascularization.
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Affiliation(s)
- Shaohua Wu
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Hao Peng
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiuhong Li
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Philipp N. Streubel
- Department of Orthopedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
| | - Yong Liu
- College of Mechanical and Electric Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Bin Duan
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA
- Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Surgery, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA
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260
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Tan R, Yang X, Shen Y. Robot-aided electrospinning toward intelligent biomedical engineering. ROBOTICS AND BIOMIMETICS 2017; 4:17. [PMID: 29170731 PMCID: PMC5681621 DOI: 10.1186/s40638-017-0075-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/01/2017] [Indexed: 01/01/2023]
Abstract
The rapid development of robotics offers new opportunities for the traditional biofabrication in higher accuracy and controllability, which provides great potentials for the intelligent biomedical engineering. This paper reviews the state of the art of robotics in a widely used biomaterial fabrication process, i.e., electrospinning, including its working principle, main applications, challenges, and prospects. First, the principle and technique of electrospinning are introduced by categorizing it to melt electrospinning, solution electrospinning, and near-field electrospinning. Then, the applications of electrospinning in biomedical engineering are introduced briefly from the aspects of drug delivery, tissue engineering, and wound dressing. After that, we conclude the existing problems in traditional electrospinning such as low production, rough nanofibers, and uncontrolled morphology, and then discuss how those problems are addressed by robotics via four case studies. Lastly, the challenges and outlooks of robotics in electrospinning are discussed and prospected.
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Affiliation(s)
- Rong Tan
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
| | - Xiong Yang
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
| | - Yajing Shen
- City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, SAR
- Centre for Robotics and Automation, CityU Shen Zhen Research Institute, Shen Zhen, China
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261
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Electrospinning of gelatin with tunable fiber morphology from round to flat/ribbon. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 80:371-378. [DOI: 10.1016/j.msec.2017.06.001] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 05/05/2017] [Accepted: 06/06/2017] [Indexed: 11/21/2022]
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262
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Sankar S, Sharma CS, Rath SN, Ramakrishna S. Electrospun Fibers for Recruitment and Differentiation of Stem Cells in Regenerative Medicine. Biotechnol J 2017; 12. [PMID: 28980771 DOI: 10.1002/biot.201700263] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 09/12/2017] [Indexed: 11/11/2022]
Abstract
Electrospinning is a popular technique used to mimic the natural sub-micron features of the native tissue. The ultra-fine fibers provide a favorable extracellular matrix-like environment for regulation of cellular functions. This article summarizes and reviews the current advances in electrospun fiber application and focuses on the novel strategies applied for tissue regeneration and repair. It explores the different factors affecting the attachment and proliferation of mesenchymal stem cells (MSCs) on the electrospun substrates. The influence of different features of electrospun fibers in the differentiation of MSCs into specific lineages (bone, cartilage, tendon/ligament, and nerves) has been elaborated. In addition, the different techniques to mimic the hierarchical features of tissues and its effect on cellular functions are reviewed. Additionally, the new developments like three-dimensional (3D) electrospinning, 3D spheroid double strategy and the comparative analysis of dynamic and static culture on electrospun scaffolds are discussed. With the intricate understanding of the interaction between the cells and the electrospun fiber matrix we can aim to combine the newer strategies to overcome the existing challenges and improve the potential application of electrospun fibers in the field of tissue regeneration and repair.
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Affiliation(s)
- Sharanya Sankar
- Department of Biomedical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Chandra S Sharma
- Department of Chemical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Subha N Rath
- Department of Biomedical Engineering, Indian Institute of Technology, Telangana-502285, Hyderabad, India
| | - Seeram Ramakrishna
- Center for Nanofibers & Nanotechnology, National University of Singapore, 110077, Singapore
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263
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Wu S, Wang Y, Streubel PN, Duan B. Living nanofiber yarn-based woven biotextiles for tendon tissue engineering using cell tri-culture and mechanical stimulation. Acta Biomater 2017; 62:102-115. [PMID: 28864251 PMCID: PMC5623069 DOI: 10.1016/j.actbio.2017.08.043] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 08/16/2017] [Accepted: 08/28/2017] [Indexed: 12/28/2022]
Abstract
Non-woven nanofibrous scaffolds have been developed for tendon graft application by using electrospinning strategies. However, electrospun nanofibrous scaffolds face some obstacles and limitations, including suboptimal scaffold structure, weak tensile and suture-retention strengths, and compact structure for cell infiltration. In this work, a novel nanofibrous, woven biotextile, fabricated based on electrospun nanofiber yarns, was implemented as a tissue engineered tendon scaffold. Based on our modified electrospinning setup, polycaprolactone (PCL) nanofiber yarns were fabricated with reproducible quality, and were further processed into plain-weaving fabrics interlaced with polylactic acid (PLA) multifilaments. Nonwoven nanofibrous PCL meshes with random or aligned fiber structures were generated using typical electrospinning as comparative counterparts. The woven fabrics contained 3D aligned microstructures with significantly larger pore size and obviously enhanced tensile mechanical properties than their nonwoven counterparts. The biological results revealed that cell proliferation and infiltration, along with the expression of tendon-specific genes by human adipose derived mesenchymal stem cells (HADMSC) and human tenocytes (HT), were significantly enhanced on the woven fabrics compared with those on randomly-oriented or aligned nanofiber meshes. Co-cultures of HADMSC with HT or human umbilical vein endothelial cells (HUVEC) on woven fabrics significantly upregulated the functional expression of most tenogenic markers. HADMSC/HT/HUVEC tri-culture on woven fabrics showed the highest upregulation of most tendon-associated markers than all the other mono- and co-culture groups. Furthermore, we conditioned the tri-cultured constructs with dynamic conditioning and demonstrated that dynamic stretch promoted total collagen secretion and tenogenic differentiation. Our nanofiber yarn-based biotextiles have significant potential to be used as engineered scaffolds to synergize the multiple cell interaction and mechanical stimulation for promoting tendon regeneration. STATEMENT OF SIGNIFICANCE Tendon grafts are essential for the treatment of various tendon-related conditions due to the inherently poor healing capacity of native tendon tissues. In this study, we combined electrospun nanofiber yarns with textile manufacturing strategies to fabricate nanofibrous woven biotextiles with hierarchical features, aligned fibrous topography, and sufficient mechanical properties as tendon tissue engineered scaffolds. Comparing to traditional electrospun random or aligned meshes, our novel nanofibrous woven fabrics possess strong tensile and suture-retention strengths and larger pore size. We also demonstrated that the incorporation of tendon cells and vascular cells promoted the tenogenic differentiation of the engineered tendon constructs, especially under dynamic stretch. This study not only presents a novel tissue engineered tendon scaffold fabrication technique but also provides a useful strategy to promote tendon differentiation and regeneration.
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Affiliation(s)
- Shaohua Wu
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ying Wang
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA
| | - Philipp N Streubel
- Department of Orthopedic Surgery and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
| | - Bin Duan
- Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE, USA; Division of Cardiology, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, USA; Department of Surgery, College of Medicine, University of Nebraska Medical Center, Omaha, NE, USA.
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Vedadghavami A, Minooei F, Mohammadi MH, Khetani S, Rezaei Kolahchi A, Mashayekhan S, Sanati-Nezhad A. Manufacturing of hydrogel biomaterials with controlled mechanical properties for tissue engineering applications. Acta Biomater 2017; 62:42-63. [PMID: 28736220 DOI: 10.1016/j.actbio.2017.07.028] [Citation(s) in RCA: 261] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 07/16/2017] [Accepted: 07/20/2017] [Indexed: 10/19/2022]
Abstract
Hydrogels have been recognized as crucial biomaterials in the field of tissue engineering, regenerative medicine, and drug delivery applications due to their specific characteristics. These biomaterials benefit from retaining a large amount of water, effective mass transfer, similarity to natural tissues and the ability to form different shapes. However, having relatively poor mechanical properties is a limiting factor associated with hydrogel biomaterials. Controlling the biomechanical properties of hydrogels is of paramount importance. In this work, firstly, mechanical characteristics of hydrogels and methods employed for characterizing these properties are explored. Subsequently, the most common approaches used for tuning mechanical properties of hydrogels including but are not limited to, interpenetrating polymer networks, nanocomposites, self-assembly techniques, and co-polymerization are discussed. The performance of different techniques used for tuning biomechanical properties of hydrogels is further compared. Such techniques involve lithography techniques for replication of tissues with complex mechanical profiles; microfluidic techniques applicable for generating gradients of mechanical properties in hydrogel biomaterials for engineering complex human tissues like intervertebral discs, osteochondral tissues, blood vessels and skin layers; and electrospinning techniques for synthesis of hybrid hydrogels and highly ordered fibers with tunable mechanical and biological properties. We finally discuss future perspectives and challenges for controlling biomimetic hydrogel materials possessing proper biomechanical properties. STATEMENT OF SIGNIFICANCE Hydrogels biomaterials are essential constituting components of engineered tissues with the applications in regenerative medicine and drug delivery. The mechanical properties of hydrogels play crucial roles in regulating the interactions between cells and extracellular matrix and directing the cells phenotype and genotype. Despite significant advances in developing methods and techniques with the ability of tuning the biomechanical properties of hydrogels, there are still challenges regarding the synthesis of hydrogels with complex mechanical profiles as well as limitations in vascularization and patterning of complex structures of natural tissues which barricade the production of sophisticated organs. Therefore, in addition to a review on advanced methods and techniques for measuring a variety of different biomechanical characteristics of hydrogels, the new techniques for enhancing the biomechanics of hydrogels are presented. It is expected that this review will profit future works for regulating the biomechanical properties of hydrogel biomaterials to satisfy the demands of a variety of different human tissues.
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265
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Li W, Shi L, Zhang X, Liu K, Ullah I, Cheng P. Electrospinning of polycaprolactone nanofibers using H2
O as benign additive in polycaprolactone/glacial acetic acid solution. J Appl Polym Sci 2017. [DOI: 10.1002/app.45578] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wenchao Li
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
| | - Lei Shi
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
| | - Xianglin Zhang
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
| | - Kang Liu
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
| | - Ismat Ullah
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
| | - Penghua Cheng
- State Key Lab of Material Processing and Die & Mould Technology, School of Materials Science and Engineering; Huazhong University of Science and Technology; Wuhan 430074 People's Republic of China
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266
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Sattary M, Khorasani MT, Rafienia M, Rozve HS. Incorporation of nanohydroxyapatite and vitamin D3 into electrospun PCL/Gelatin scaffolds: The influence on the physical and chemical properties and cell behavior for bone tissue engineering. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4134] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Mansoureh Sattary
- Department of Biomedical Engineering, Science, and Research Branch; Islamic Azad University; Tehran Iran
| | - Mohammad Taghi Khorasani
- Biomaterial Department of Iran Polymer and Petrochemical Institute; PO Box 14965 159 Tehran Iran
| | - Mohammad Rafienia
- Biosensor Research Center; Isfahan University of Medical Sciences; 81744176 Isfahan Iran
| | - Hossein Salehi Rozve
- Department of Anatomical Sciences and Molecular Biology, School of Medicine; Isfahan University of Medical Sciences; 81744176 Isfahan Iran
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267
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Sapountzi E, Braiek M, Chateaux JF, Jaffrezic-Renault N, Lagarde F. Recent Advances in Electrospun Nanofiber Interfaces for Biosensing Devices. SENSORS (BASEL, SWITZERLAND) 2017; 17:E1887. [PMID: 28813013 PMCID: PMC5579928 DOI: 10.3390/s17081887] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 08/11/2017] [Accepted: 08/13/2017] [Indexed: 01/08/2023]
Abstract
Electrospinning has emerged as a very powerful method combining efficiency, versatility and low cost to elaborate scalable ordered and complex nanofibrous assemblies from a rich variety of polymers. Electrospun nanofibers have demonstrated high potential for a wide spectrum of applications, including drug delivery, tissue engineering, energy conversion and storage, or physical and chemical sensors. The number of works related to biosensing devices integrating electrospun nanofibers has also increased substantially over the last decade. This review provides an overview of the current research activities and new trends in the field. Retaining the bioreceptor functionality is one of the main challenges associated with the production of nanofiber-based biosensing interfaces. The bioreceptors can be immobilized using various strategies, depending on the physical and chemical characteristics of both bioreceptors and nanofiber scaffolds, and on their interfacial interactions. The production of nanobiocomposites constituted by carbon, metal oxide or polymer electrospun nanofibers integrating bioreceptors and conductive nanomaterials (e.g., carbon nanotubes, metal nanoparticles) has been one of the major trends in the last few years. The use of electrospun nanofibers in ELISA-type bioassays, lab-on-a-chip and paper-based point-of-care devices is also highly promising. After a short and general description of electrospinning process, the different strategies to produce electrospun nanofiber biosensing interfaces are discussed.
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Affiliation(s)
- Eleni Sapountzi
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
| | - Mohamed Braiek
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
- Laboratoire des Interfaces et des Matériaux Avancés, Faculté des Sciences de Monastir, Avenue de l'Environnement, University of Monastir, Monastir 5019, Tunisia.
| | - Jean-François Chateaux
- Université Lyon, Université Claude Bernard Lyon 1, CNRS, Institut des Nanotechnologies de Lyon, UMR5270, Bâtiment Léon Brillouin, 6, rue Ada Byron, F-69622 Villeurbanne CEDEX, France.
| | - Nicole Jaffrezic-Renault
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
| | - Florence Lagarde
- Université Lyon, CNRS, Université Claude Bernard Lyon 1, ENS de Lyon, Institute of Analytical Sciences, UMR 5280, 5 Rue la Doua, F-69100 Villeurbanne, France.
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268
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Kim JJ, Hou L, Yang G, Mezak NP, Wanjare M, Joubert LM, Huang NF. Microfibrous Scaffolds Enhance Endothelial Differentiation and Organization of Induced Pluripotent Stem Cells. Cell Mol Bioeng 2017; 10:417-432. [PMID: 28936269 DOI: 10.1007/s12195-017-0502-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Human induced pluripotent stem cells (iPSCs) are a promising source of endothelial cells (iPSC-ECs) for engineering three-dimensional (3D) vascularized cardiac tissues. To mimic cardiac microvasculature, in which capillaries are oriented in parallel, we hypothesized that endothelial differentiation of iPSCs within topographically aligned 3D scaffolds would be a facile one-step approach to generate iPSC-ECs as well as induce aligned vascular organization. METHODS Human iPSCs underwent endothelial differentiation within electrospun 3D polycaprolactone (PCL) scaffolds having either randomly oriented or parallel-aligned microfibers. Using transcriptional, protein, and endothelial functional assays, endothelial differentiation was compared between conventional two-dimensional (2D) films and 3D scaffolds having either randomly oriented or aligned microfibers. Furthermore, the role of parallel-aligned microfiber patterning on the organization of vessel-like networks was assessed. RESULTS The cells in both the randomly oriented and aligned 3D scaffolds demonstrated an 11-fold upregulation in gene expression of the endothelial phenotypic marker, CD31, compared to cells on 2D films. This upregulation corresponded to >3-fold increase in CD31 protein expression in 3D scaffolds, compared to 2D films. Concomitantly, other endothelial phenotypic markers including CD144 and endothelial nitric oxide synthase also showed significant transcriptional upregulation in 3D scaffolds by >7-fold, compared to 2D films. Nitric oxide production, which is characteristic of endothelial function, was produced 4-fold more abundantly in 3D scaffolds, compared to on 2D PCL films. Within aligned scaffolds, the iPSC-ECs displayed parallel-aligned vascular-like networks with 70% longer branch length, compared to cells in randomly oriented scaffolds, suggesting that fiber topography modulates vascular network-like formation and patterning. CONCLUSION Together, these results demonstrate that 3D scaffold structure promotes endothelial differentiation, compared to 2D substrates, and that aligned topographical patterning induces anisotropic vascular network organization.
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Affiliation(s)
- Joseph J Kim
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
| | - Luqia Hou
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
| | - Guang Yang
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
| | - Nicholas P Mezak
- Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
| | - Maureen Wanjare
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA
| | - Lydia M Joubert
- Cell Sciences Imaging Facility, Stanford University Medical School, Stanford, CA, USA
| | - Ngan F Huang
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, USA.,Center for Tissue Regeneration, Repair and Restoration, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA.,Department of Cardiothoracic Surgery, Stanford University, Stanford, CA, USA
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269
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Modification of electrospun poly(L-lactic acid)/polyethylenimine nanofibrous scaffolds for biomedical application. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2017.1320661] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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270
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Kishan AP, Cosgriff-Hernandez EM. Recent advancements in electrospinning design for tissue engineering applications: A review. J Biomed Mater Res A 2017; 105:2892-2905. [DOI: 10.1002/jbm.a.36124] [Citation(s) in RCA: 137] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 05/23/2017] [Indexed: 12/28/2022]
Affiliation(s)
- Alysha P. Kishan
- Department of Biomedical Engineering; Texas A&M University, 5045 Emerging Technologies Building; 3120 TAMU College Station Texas 77843-3120
| | - Elizabeth M. Cosgriff-Hernandez
- Department of Biomedical Engineering; Texas A&M University, 5045 Emerging Technologies Building; 3120 TAMU College Station Texas 77843-3120
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271
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Köwitsch A, Zhou G, Groth T. Medical application of glycosaminoglycans: a review. J Tissue Eng Regen Med 2017; 12:e23-e41. [DOI: 10.1002/term.2398] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 10/08/2016] [Accepted: 01/09/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Alexander Köwitsch
- Biomedical Materials Group, Institute of Pharmacy; Martin Luther University Halle-Wittenberg; Halle Germany
| | - Guoying Zhou
- Biomedical Materials Group, Institute of Pharmacy; Martin Luther University Halle-Wittenberg; Halle Germany
| | - Thomas Groth
- Biomedical Materials Group, Institute of Pharmacy; Martin Luther University Halle-Wittenberg; Halle Germany
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272
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Rothrauff BB, Lauro BB, Yang G, Debski RE, Musahl V, Tuan RS. Braided and Stacked Electrospun Nanofibrous Scaffolds for Tendon and Ligament Tissue Engineering. Tissue Eng Part A 2017; 23:378-389. [PMID: 28071988 PMCID: PMC5444507 DOI: 10.1089/ten.tea.2016.0319] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Accepted: 12/22/2016] [Indexed: 10/20/2022] Open
Abstract
Tendon and ligament injuries are a persistent orthopedic challenge given their poor innate healing capacity. Nonwoven electrospun nanofibrous scaffolds composed of polyesters have been used to mimic the mechanics and topographical cues of native tendons and ligaments. However, nonwoven nanofibers have several limitations that prevent broader clinical application, including poor cell infiltration, as well as tensile and suture-retention strengths that are inferior to native tissues. In this study, multilayered scaffolds of aligned electrospun nanofibers of two designs-stacked or braided-were fabricated. Mechanical properties, including structural and mechanical properties and suture-retention strength, were determined using acellular scaffolds. Human bone marrow-derived mesenchymal stem cells (MSCs) were seeded on scaffolds for up to 28 days, and assays for tenogenic differentiation, histology, and biochemical composition were performed. Braided scaffolds exhibited improved tensile and suture-retention strengths, but reduced moduli. Both scaffold designs supported expression of tenogenic markers, although the effect was greater on braided scaffolds. Conversely, cell infiltration was superior in stacked constructs, resulting in enhanced cell number, total collagen content, and total sulfated glycosaminoglycan content. However, when normalized against cell number, both designs modulated extracellular matrix protein deposition to a similar degree. Taken together, this study demonstrates that multilayered scaffolds of aligned electrospun nanofibers supported tenogenic differentiation of seeded MSCs, but the macroarchitecture is an important consideration for applications of tendon and ligament tissue engineering.
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Affiliation(s)
- Benjamin B. Rothrauff
- Department of Orthopaedic Surgery, Center for Cellular and Molecular Engineering, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Brian B. Lauro
- Department of Orthopaedic Surgery, Center for Cellular and Molecular Engineering, Pittsburgh, Pennsylvania
- Department of Bioengineering, Swanson School of Engineering, Pittsburgh, Pennsylvania
| | - Guang Yang
- Department of Orthopaedic Surgery, Center for Cellular and Molecular Engineering, Pittsburgh, Pennsylvania
- Department of Bioengineering, Swanson School of Engineering, Pittsburgh, Pennsylvania
| | - Richard E. Debski
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Bioengineering, Swanson School of Engineering, Pittsburgh, Pennsylvania
- Orthopaedic Robotics Laboratory, Department of Orthopaedic Surgery, Pittsburgh, Pennsylvania
| | - Volker Musahl
- Department of Bioengineering, Swanson School of Engineering, Pittsburgh, Pennsylvania
- Orthopaedic Robotics Laboratory, Department of Orthopaedic Surgery, Pittsburgh, Pennsylvania
| | - Rocky S. Tuan
- Department of Orthopaedic Surgery, Center for Cellular and Molecular Engineering, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Bioengineering, Swanson School of Engineering, Pittsburgh, Pennsylvania
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273
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Ghasemi Hamidabadi H, Rezvani Z, Nazm Bojnordi M, Shirinzadeh H, Seifalian AM, Joghataei MT, Razaghpour M, Alibakhshi A, Yazdanpanah A, Salimi M, Mozafari M, Urbanska AM, Reis RL, Kundu SC, Gholipourmalekabadi M. Chitosan-Intercalated Montmorillonite/Poly(vinyl alcohol) Nanofibers as a Platform to Guide Neuronlike Differentiation of Human Dental Pulp Stem Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:11392-11404. [PMID: 28117963 DOI: 10.1021/acsami.6b14283] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
In this study, we present a novel chitosan-intercalated montmorillonite/poly(vinyl alcohol) (OMMT/PVA) nanofibrous mesh as a microenvironment for guiding differentiation of human dental pulp stem cells (hDPSCs) toward neuronlike cells. The OMMT was prepared through ion exchange reaction between the montmorillonite (MMT) and chitosan. The PVA solutions containing various concentrations of OMMT were electrospun to form 3D OMMT-PVA nanofibrous meshes. The biomechanical and biological characteristics of the nanofibrous meshes were evaluated by ATR-FTIR, XRD, SEM, MTT, and LDH specific activity, contact angle, and DAPI staining. They were carried out for mechanical properties, overall viability, and toxicity of the cells. The hDPSCs were seeded on the prepared scaffolds and induced with neuronal specific differentiation media at two differentiation stages (2 days at preinduction stage and 6 days at induction stage). The neural differentiation of the cells cultured on the meshes was evaluated by determining the expression of Oct-4, Nestin, NF-M, NF-H, MAP2, and βIII-tubulin in the cells after preinduction, at induction stages by real-time PCR (RT-PCR) and immunostaining. All the synthesized nanofibers exhibited a homogeneous morphology with a favorable mechanical behavior. The population of the cells differentiated into neuronlike cells in all the experimental groups was significantly higher than that in control group. The expression level of the neuronal specific markers in the cells cultured on 5% OMMT/PVA meshes was significantly higher than the other groups. This study demonstrates the feasibility of the OMMT/PVA artificial nerve graft cultured with hDPSCs for regeneration of damaged neural tissues. These fabricated matrices may have a potential in neural tissue engineering applications.
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Affiliation(s)
| | - Zahra Rezvani
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
| | | | - Haji Shirinzadeh
- Semiconductor Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
| | - Alexander M Seifalian
- Nanotechnology and Regenerative Medicine Commercialisation centre (Ltd) The London BioScience Innovation Centre , London, NW1 0NH, United Kingdom
| | - Mohammad Taghi Joghataei
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
| | - Mojgan Razaghpour
- Amirkabir University of Technology , Textile Department, No. 424, Tehran, Iran
| | | | - Abolfazl Yazdanpanah
- Biomaterials Group, Faculty of Biomedical Engineering (Center of Excellence), Amirkabir University of Technology , P.O. Box 15875-4413, Tehran, Iran
| | | | - Masoud Mozafari
- Bioengineering Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC) , P.O. Box 14155-4777, Tehran, Iran
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences , Tehran, Iran
| | - Aleksandra M Urbanska
- Division of Digestive and Liver Disease, Department of Medicine and Herbert Irving Comprehensive Cancer Center, Columbia University , New York, New York 10032, United States
| | - Rui L Reis
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho , AvePark 4805-017 Barco, Guimaraes, Portugal
| | - Subhas C Kundu
- 3Bs Research Group, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho , AvePark 4805-017 Barco, Guimaraes, Portugal
| | - Mazaher Gholipourmalekabadi
- Cellular and Molecular Research Center, Iran University of Medical Sciences (IUMS) , Tehran, Iran
- Department of Tissue Engineering & Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences , Tehran, Iran
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274
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Hejazi F, Mirzadeh H, Contessi N, Tanzi MC, Faré S. Novel class of collector in electrospinning device for the fabrication of 3D nanofibrous structure for large defect load-bearing tissue engineering application. J Biomed Mater Res A 2017; 105:1535-1548. [DOI: 10.1002/jbm.a.35822] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 06/06/2016] [Accepted: 06/28/2016] [Indexed: 12/13/2022]
Affiliation(s)
- Fatemeh Hejazi
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology (Tehran Polytechnic); 424 Hafez Avenue Tehran Iran
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Hamid Mirzadeh
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology (Tehran Polytechnic); 424 Hafez Avenue Tehran Iran
| | - Nicola Contessi
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Maria Cristina Tanzi
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
| | - Silvia Faré
- Department of Chemistry; Materials and Chemical Engineering ‘‘G. Natta’’; Politecnico Di Milano, P.Zza Leonardo Da Vinci 32 Milan 20133 Italy
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275
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Watson PMD, Kavanagh E, Allenby G, Vassey M. Bioengineered 3D Glial Cell Culture Systems and Applications for Neurodegeneration and Neuroinflammation. SLAS DISCOVERY 2017; 22:583-601. [PMID: 28346104 DOI: 10.1177/2472555217691450] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Neurodegeneration and neuroinflammation are key features in a range of chronic central nervous system (CNS) diseases such as Alzheimer's and Parkinson's disease, as well as acute conditions like stroke and traumatic brain injury, for which there remains significant unmet clinical need. It is now well recognized that current cell culture methodologies are limited in their ability to recapitulate the cellular environment that is present in vivo, and there is a growing body of evidence to show that three-dimensional (3D) culture systems represent a more physiologically accurate model than traditional two-dimensional (2D) cultures. Given the complexity of the environment from which cells originate, and their various cell-cell and cell-matrix interactions, it is important to develop models that can be controlled and reproducible for drug discovery. 3D cell models have now been developed for almost all CNS cell types, including neurons, astrocytes, microglia, and oligodendrocyte cells. This review will highlight a number of current and emerging techniques for the culture of astrocytes and microglia, glial cell types with a critical role in neurodegenerative and neuroinflammatory conditions. We describe recent advances in glial cell culture using electrospun polymers and hydrogel macromolecules, and highlight how these novel culture environments influence astrocyte and microglial phenotypes in vitro, as compared to traditional 2D systems. These models will be explored to illuminate current trends in the techniques used to create 3D environments for application in research and drug discovery focused on astrocytes and microglial cells.
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276
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Implantation of a Poly-L-Lactide GCSF-Functionalized Scaffold in a Model of Chronic Myocardial Infarction. J Cardiovasc Transl Res 2017; 10:47-65. [PMID: 28116550 PMCID: PMC5323505 DOI: 10.1007/s12265-016-9718-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 11/03/2016] [Indexed: 12/17/2022]
Abstract
A previously developed poly-l-lactide scaffold releasing granulocyte colony-stimulating factor (PLLA/GCSF) was tested in a rabbit chronic model of myocardial infarction (MI) as a ventricular patch. Control groups were constituted by healthy, chronic MI and nonfunctionalized PLLA scaffold. PLLA-based electrospun scaffold efficiently integrated into a chronic infarcted myocardium. Functionalization of the biopolymer with GCSF led to increased fibroblast-like vimentin-positive cellular colonization and reduced inflammatory cell infiltration within the micrometric fiber mesh in comparison to nonfunctionalized scaffold; PLLA/GCSF polymer induced an angiogenetic process with a statistically significant increase in the number of neovessels compared to the nonfunctionalized scaffold; PLLA/GCSF implanted at the infarcted zone induced a reorganization of the ECM architecture leading to connective tissue deposition and scar remodeling. These findings were coupled with a reduction in end-systolic and end-diastolic volumes, indicating a preventive effect of the scaffold on ventricular dilation, and an improvement in cardiac performance.
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277
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Kitsara M, Agbulut O, Kontziampasis D, Chen Y, Menasché P. Fibers for hearts: A critical review on electrospinning for cardiac tissue engineering. Acta Biomater 2017; 48:20-40. [PMID: 27826001 DOI: 10.1016/j.actbio.2016.11.014] [Citation(s) in RCA: 164] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/17/2016] [Accepted: 11/03/2016] [Indexed: 12/11/2022]
Abstract
Cardiac cell therapy holds a real promise for improving heart function and especially of the chronically failing myocardium. Embedding cells into 3D biodegradable scaffolds may better preserve cell survival and enhance cell engraftment after transplantation, consequently improving cardiac cell therapy compared with direct intramyocardial injection of isolated cells. The primary objective of a scaffold used in tissue engineering is the recreation of the natural 3D environment most suitable for an adequate tissue growth. An important aspect of this commitment is to mimic the fibrillar structure of the extracellular matrix, which provides essential guidance for cell organization, survival, and function. Recent advances in nanotechnology have significantly improved our capacities to mimic the extracellular matrix. Among them, electrospinning is well known for being easy to process and cost effective. Consequently, it is becoming increasingly popular for biomedical applications and it is most definitely the cutting edge technique to make scaffolds that mimic the extracellular matrix for industrial applications. Here, the desirable physico-chemical properties of the electrospun scaffolds for cardiac therapy are described, and polymers are categorized to natural and synthetic.Moreover, the methods used for improving functionalities by providing cells with the necessary chemical cues and a more in vivo-like environment are reported.
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278
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Bayrak E, Ozcan B, Erisken C. Processing of polycaprolactone and hydroxyapatite to fabricate graded electrospun composites for tendon-bone interface regeneration. JOURNAL OF POLYMER ENGINEERING 2017. [DOI: 10.1515/polyeng-2016-0017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The process of electrospinning is utilized with different approaches including conventional electrospinning, extrusion electrospinning, and electroblowing to form nanofibrous meshes and composites. Here, we report on the quality and properties of spatially graded polycaprolactone (PCL) and nano-hydroxyapatite (nHA) composite meshes fabricated with multiple-spinneret electrospinning. The composite meshes were characterized in terms of the amount of spatially allocated nHA concentration across the mesh, fiber diameter, porosity, pore size, and hydrophilicity of meshes. Results show that linearly and continuously varying nHA concentration distribution, i.e. graded structure, can be accomplished across the mesh thickness using multiple-spinneret electrospinning, which is in accordance with the change of mineral concentration observed in native tendon-bone interface. Furthermore, incorporation of nanoparticles into nanofibers led to increased fiber diameter as depicted by a shift in fiber diameter distribution, a significant increase in mean fiber diameter from 361±9 nm to 459±21 nm, and an increase in contact angle from 120.01±2.77° to 115.24±1.17°. These findings suggest that the composite meshes formed in this study could serve as model systems to be used as scaffolds in tendon-bone tissue engineering application in particular, and for other tissue-tissue interfaces in a broader context.
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279
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Hejazi F, Mirzadeh H. Roll-designed 3D nanofibrous scaffold suitable for the regeneration of load bearing bone defects. Prog Biomater 2016; 5:199-211. [PMID: 27995587 PMCID: PMC5301453 DOI: 10.1007/s40204-016-0058-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 11/07/2016] [Indexed: 12/24/2022] Open
Abstract
In this work, an innovative and easy method for the fabrication of 3D scaffold from 2D electrospun structures is introduced. For this aim, coral microparticles were fixed inside the nanofibrous PCL/Gelatin mat and the obtained structure was post assembled into a cylindrical design. Scaffold fabrication procedure is described in detail and morphological properties, physical and mechanical characteristics and in vitro assessments of the prepared scaffold are reported. Presences of coral microparticles in the structure led to the formation of empty spaces (3D pores) between nanofibrous layers which in turn prevent the compact accumulation of nanofibers. Post-assembly of the obtained nanofibrous coral-loaded structures makes it possible to prepare a scaffold with any desired dimension (diameter and height). Existence of coral particles within the nanofibrous mats resulted in distant placement of layers toward each other in the assembling step, which in turn create vacancy in the structure for cellular migration and fluid and nutrients exchange of the scaffold with the surrounding environment. Cell morphology within the scaffolds is investigated and cytotoxicity and cytocompatibility of the structure is evaluated using Alamar blue assay. Enhancement in mineralization of the seeded cells within the prepared coral-loaded scaffolds is demonstrated by the use of SEM-EDX. Performed compression mechanical test revealed excellent modulus and stiffness values for the cylindrical samples which are comparable to those of natural bone tissue.
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Affiliation(s)
- Fatemeh Hejazi
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, 1591634311, Tehran, Iran
| | - Hamid Mirzadeh
- Department of Polymer Engineering and Color Technology, Amirkabir University of Technology (Tehran Polytechnic), 424 Hafez Avenue, 1591634311, Tehran, Iran.
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280
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Improved human endometrial stem cells differentiation into functional hepatocyte-like cells on a glycosaminoglycan/collagen-grafted polyethersulfone nanofibrous scaffold. J Biomed Mater Res B Appl Biomater 2016; 105:2516-2529. [DOI: 10.1002/jbm.b.33758] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 06/13/2016] [Accepted: 07/11/2016] [Indexed: 12/11/2022]
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281
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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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282
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Sharifi F, Sooriyarachchi AC, Altural H, Montazami R, Rylander MN, Hashemi N. Fiber Based Approaches as Medicine Delivery Systems. ACS Biomater Sci Eng 2016; 2:1411-1431. [DOI: 10.1021/acsbiomaterials.6b00281] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Farrokh Sharifi
- Department
of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | | | - Hayriye Altural
- Department
of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
| | - Reza Montazami
- Department
of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
- Center
of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, Iowa 50011, United States
| | - Marissa Nichole Rylander
- Department
of Mechanical Engineering, University of Texas at Austin, Austin, Texas 78712, United States
| | - Nastaran Hashemi
- Department
of Mechanical Engineering, Iowa State University, Ames, Iowa 50011, United States
- Center
of Advanced Host Defense Immunobiotics and Translational Medicine, Iowa State University, Ames, Iowa 50011, United States
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283
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Moreira R, Neusser C, Kruse M, Mulderrig S, Wolf F, Spillner J, Schmitz-Rode T, Jockenhoevel S, Mela P. Tissue-Engineered Fibrin-Based Heart Valve with Bio-Inspired Textile Reinforcement. Adv Healthc Mater 2016; 5:2113-21. [PMID: 27377438 DOI: 10.1002/adhm.201600300] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 04/28/2016] [Indexed: 12/12/2022]
Abstract
The mechanical properties of tissue-engineered heart valves still need to be improved to enable their implantation in the systemic circulation. The aim of this study is to develop a tissue-engineered valve for the aortic position - the BioTexValve - by exploiting a bio-inspired composite textile scaffold to confer native-like mechanical strength and anisotropy to the leaflets. This is achieved by multifilament fibers arranged similarly to the collagen bundles in the native aortic leaflet, fixed by a thin electrospun layer directly deposited on the pattern. The textile-based leaflets are positioned into a 3D mould where the components to form a fibrin gel containing human vascular smooth muscle cells are introduced. Upon fibrin polymerization, a complete valve is obtained. After 21 d of maturation by static and dynamic stimulation in a custom-made bioreactor, the valve shows excellent functionality under aortic pressure and flow conditions, as demonstrated by hydrodynamic tests performed according to ISO standards in a mock circulation system. The leaflets possess remarkable burst strength (1086 mmHg) while remaining pliable; pronounced extracellular matrix production is revealed by immunohistochemistry and biochemical assay. This study demonstrates the potential of bio-inspired textile-reinforcement for the fabrication of functional tissue-engineered heart valves for the aortic position.
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Affiliation(s)
- Ricardo Moreira
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Christine Neusser
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
| | - Magnus Kruse
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
| | - Shane Mulderrig
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Frederic Wolf
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Jan Spillner
- Department for Cardiothoracic- and Vascular Surgery; University Hospital RWTH Aachen; Pauwelsstr. 30 52074 Aachen Germany
| | - Thomas Schmitz-Rode
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Stefan Jockenhoevel
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
- Institute for Textile Engineering; RWTH Aachen University; Otto-Blumenthal-Str. 1 52074 Aachen Germany
- Department of Tissue Engineering and Textile Implants; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
| | - Petra Mela
- Department of Tissue Engineering and Textile Implant; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
- Department of Tissue Engineering and Textile Implants; AME-Helmholtz Institute for Biomedical Engineering; University Hospital RWTH Aachen; Pauwelsstr. 20 52074 Aachen Germany
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284
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Abstract
Rotator cuff tears continue to be at significant risk for re-tear or for failure to heal after surgical repair despite the use of a variety of surgical techniques and augmentation devices. Therefore, there is a need for functionalized scaffold strategies to provide sustained mechanical augmentation during the critical first 12-weeks following repair, and to enhance the healing potential of the repaired tendon and tendon-bone interface. Tissue engineered approaches that combine the use of scaffolds, cells, and bioactive molecules towards promising new solutions for rotator cuff repair are reviewed. The ideal scaffold should have adequate initial mechanical properties, be slowly degrading or non-degradable, have non-toxic degradation products, enhance cell growth, infiltration and differentiation, promote regeneration of the tendon-bone interface, be biocompatible and have excellent suture retention and handling properties. Scaffolds that closely match the inhomogeneity and non-linearity of the native rotator cuff may significantly advance the field. While substantial pre-clinical work remains to be done, continued progress in overcoming current tissue engineering challenges should allow for successful clinical translation.
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285
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Saquinavir Loaded Acetalated Dextran Microconfetti - a Long Acting Protease Inhibitor Injectable. Pharm Res 2016; 33:1998-2009. [PMID: 27154460 DOI: 10.1007/s11095-016-1936-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/27/2016] [Indexed: 01/18/2023]
Abstract
PURPOSE Since the adoption of highly active antiretroviral therapy, HIV disease progression has slowed across the world; however, patients are often required to take multiple medications daily of poorly bioavailable drugs via the oral route, leading to gastrointestinal irritation. Recently, long acting antiretroviral injectables that deliver drug for months at a time have moved into late phase clinical trials. Unfortunately, these solid phase crystal formulations have inherent drawbacks in potential dose dumping and a greater likelihood for burst release of drug compared to polymeric formulations. METHODS Using electrospinning, acetalated dextran scaffolds containing the protease inhibitor saquinavir were created. Grinding techniques were then used to process these scaffolds into injectables which are termed saquinavir microconfetti. Microconfetti was analyzed for in vitro and in vivo release kinetics. RESULTS Highly saquinavir loaded acetalated dextran electrospun fibers were able to be formed and processed into saquinavir microconfetti while other polymers such as poly lactic-co-glycolic acid and polycaprolactone were unable to do so. Saquinavir microconfetti release kinetics were able to be tuned via drug loading and polymer degradation rates. In vivo, a single subcutaneous injection of saquinavir microconfetti released drug for greater than a week with large tissue retention. CONCLUSIONS Microconfetti is a uniquely tunable long acting injectable that would reduce the formation of adherence related HIV resistance. Our findings suggest that the injectable microconfetti delivery system could be used for long acting controlled release of saquinavir and other hydrophobic small molecule drugs.
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286
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Valente TAM, Silva DM, Gomes PS, Fernandes MH, Santos JD, Sencadas V. Effect of Sterilization Methods on Electrospun Poly(lactic acid) (PLA) Fiber Alignment for Biomedical Applications. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3241-3249. [PMID: 26756809 DOI: 10.1021/acsami.5b10869] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Medically approved sterility methods should be a major concern when developing a polymeric scaffold, mainly when commercialization is envisaged. In the present work, poly(lactic acid) (PLA) fiber membranes were processed by electrospinning with random and aligned fiber alignment and sterilized under UV, ethylene oxide (EO), and γ-radiation, the most common ones for clinical applications. It was observed that UV light and γ-radiation do not influence fiber morphology or alignment, while electrospun samples treated with EO lead to fiber orientation loss and morphology changing from cylindrical fibers to ribbon-like structures, accompanied to an increase of polymer crystallinity up to 28%. UV light and γ-radiation sterilization methods showed to be less harmful to polymer morphology, without significant changes in polymer thermal and mechanical properties, but a slight increase of polymer wettability was detected, especially for the samples treated with UV radiation. In vitro results indicate that both UV and γ-radiation treatments of PLA membranes allow the adhesion and proliferation of MG 63 osteoblastic cells in a close interaction with the fiber meshes and with a growth pattern highly sensitive to the underlying random or aligned fiber orientation. These results are suggestive of the potential of both γ-radiation sterilized PLA membranes for clinical applications in regenerative medicine, especially those where customized membrane morphology and fiber alignment is an important issue.
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Affiliation(s)
- T A M Valente
- Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto , Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - D M Silva
- Biosckin, Molecular, and Cell Therapies, SA. Parque Tecnológico da Maia-Tecmaia , Rua Eng.° Frederico Ulrich, 2650, 4470-605 Maia, Portugal
| | - P S Gomes
- Faculdade de Medicina Dentária, Universidade do Porto , Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal
| | - M H Fernandes
- Faculdade de Medicina Dentária, Universidade do Porto , Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal
| | - J D Santos
- Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto , Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- CEMUC, Departamento de Engenharia Metalúrgica e Materiais, Faculdade de Engenharia, Universidade do Porto , Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - V Sencadas
- School of Mechanical, Materials, and Mechatronics Engineering, University of Wollongong , Wollongong, NSW 2522, Australia
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287
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de Castro JG, Rodrigues BVM, Ricci R, Costa MM, Ribeiro AFC, Marciano FR, Lobo AO. Designing a novel nanocomposite for bone tissue engineering using electrospun conductive PBAT/polypyrrole as a scaffold to direct nanohydroxyapatite electrodeposition. RSC Adv 2016. [DOI: 10.1039/c6ra00889e] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Electrospinning is a well-recognized technique for producing nanostructured fibers with different functionalities, generating materials that are able to support cell adhesion and further proliferation.
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Affiliation(s)
- Juçara G. de Castro
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - Bruno V. M. Rodrigues
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - Ritchelli Ricci
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - Maíra M. Costa
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - André F. C. Ribeiro
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - Fernanda R. Marciano
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
| | - Anderson O. Lobo
- Laboratory of Biomedical Nanotechnology (NANOBIO)
- Institute of Research and Development (IP&D II)
- University of Vale do Paraiba (UNIVAP)
- Sao Jose dos Campos
- Brazil
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288
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Fu X, Xu M, Jia C, Xie W, Wang L, Kong D, Wang H. Differential regulation of skin fibroblasts for their TGF-β1-dependent wound healing activities by biomimetic nanofibers. J Mater Chem B 2016; 4:5246-5255. [DOI: 10.1039/c6tb00882h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nanofibers with different compositions differentially regulate fibroblast phenotypes in a TGF-β1 rich milieu through the integrin-mediated TGF-β1/Smad signaling pathway.
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Affiliation(s)
- X. Fu
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
- Department of Chemistry
| | - M. Xu
- Department of Chemistry
- Chemical Biology and Biomedical Engineering
- Stevens Institute of Technology
- Hoboken
- USA
| | - C. Jia
- Department of Chemistry
- Chemical Biology and Biomedical Engineering
- Stevens Institute of Technology
- Hoboken
- USA
| | - W. Xie
- The School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510641
- China
| | - L. Wang
- Institute of Molecular Biology
- School of Life Sciences
- Nankai University
- Tianjin 300071
- China
| | - D. Kong
- Institute of Molecular Biology
- School of Life Sciences
- Nankai University
- Tianjin 300071
- China
| | - H. Wang
- Department of Chemistry
- Chemical Biology and Biomedical Engineering
- Stevens Institute of Technology
- Hoboken
- USA
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289
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Sun B, Jiang XJ, Zhang S, Zhang JC, Li YF, You QZ, Long YZ. Electrospun anisotropic architectures and porous structures for tissue engineering. J Mater Chem B 2015; 3:5389-5410. [DOI: 10.1039/c5tb00472a] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent advances in electrospun anisotropic architectures and porous structures, as well as their applications in tissue engineering, are presented.
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Affiliation(s)
- Bin Sun
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
- Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University)
| | - Xue-Jun Jiang
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
- Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University)
| | - Shuchao Zhang
- Department of Blood Transfusion
- the Affiliated Hospital of Qingdao University
- Qingdao
- P. R. China
- Department of Immunology
| | - Jun-Cheng Zhang
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
- Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University)
| | - Yi-Feng Li
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
| | - Qin-Zhong You
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
| | - Yun-Ze Long
- College of Physics
- Qingdao University
- Qingdao 266071
- P. R. China
- Key Laboratory of Photonics Materials and Technology in Universities of Shandong (Qingdao University)
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290
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Nam J, Huang Y, Agarwal S, Lannutti J. Improved cellular infiltration in electrospun fiber via engineered porosity. TISSUE ENGINEERING 2007; 13:2249-57. [PMID: 17536926 PMCID: PMC4948987 DOI: 10.1089/ten.2006.0306] [Citation(s) in RCA: 329] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Small pore sizes inherent to electrospun matrices can hinder efficient cellular ingrowth. To facilitate infiltration while retaining its extracellular matrix-like character, electrospinning was combined with salt leaching to produce a scaffold having deliberate, engineered delaminations. We made elegant use of a specific randomizing component of the electrospinning process, the Taylor Cone and the falling fiber beneath it, to produce a uniform, well-spread distribution of salt particles. After 3 weeks of culture, up to 4 mm of cellular infiltration was observed, along with cellular coverage of up to 70% within the delaminations. To our knowledge, this represents the first observation of extensive cellular infiltration of electrospun matrices. Infiltration appears to be driven primarily by localized proliferation rather than coordinated cellular locomotion. Cells also moved from the salt-generated porosity into the surrounding electrospun fiber matrix. Given that the details of salt deposition (amount, size, and number density) are far from optimized, the result provides a convincing illustration of the ability of mammalian cells to interact with appropriately tailored electrospun matrices. These layered structures can be precisely fabricated by varying the deposition interval and particle size conceivably to produce in vivo-like gradients in porosity such that the resulting scaffolds better resemble the desired final structure.
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Affiliation(s)
- Jin Nam
- Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210, USA
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