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Jiang X, Zeng YE, Li C, Wang K, Yu DG. Enhancing diabetic wound healing: advances in electrospun scaffolds from pathogenesis to therapeutic applications. Front Bioeng Biotechnol 2024; 12:1354286. [PMID: 38375451 PMCID: PMC10875055 DOI: 10.3389/fbioe.2024.1354286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 01/17/2024] [Indexed: 02/21/2024] Open
Abstract
Diabetic wounds are a significant subset of chronic wounds characterized by elevated levels of inflammatory cytokines, matrix metalloproteinases (MMPs), and reactive oxygen species (ROS). They are also associated with impaired angiogenesis, persistent infection, and a high likelihood of hospitalization, leading to a substantial economic burden for patients. In severe cases, amputation or even mortality may occur. Diabetic foot ulcers (DFUs) are a common complication of diabetes, with up to 25% of diabetic patients being at risk of developing foot ulcers over their lifetime, and more than 70% ultimately requiring amputation. Electrospun scaffolds exhibit a structural similarity to the extracellular matrix (ECM), promoting the adhesion, growth, and migration of fibroblasts, thereby facilitating the formation of new skin tissue at the wound site. The composition and size of electrospun scaffolds can be easily adjusted, enabling controlled drug release through fiber structure modifications. The porous nature of these scaffolds facilitates gas exchange and the absorption of wound exudate. Furthermore, the fiber surface can be readily modified to impart specific functionalities, making electrospinning nanofiber scaffolds highly promising for the treatment of diabetic wounds. This article provides a concise overview of the healing process in normal wounds and the pathological mechanisms underlying diabetic wounds, including complications such as diabetic foot ulcers. It also explores the advantages of electrospinning nanofiber scaffolds in diabetic wound treatment. Additionally, it summarizes findings from various studies on the use of different types of nanofiber scaffolds for diabetic wounds and reviews methods of drug loading onto nanofiber scaffolds. These advancements broaden the horizon for effectively treating diabetic wounds.
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Affiliation(s)
- Xuewen Jiang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, China
| | - Yu-E Zeng
- Department of Neurology, Ruijin Hospital Lu Wan Branch, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Chaofei Li
- Department of General Surgery, Ruijin Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ke Wang
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, China
| | - Deng-Guang Yu
- School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, China
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Sharma D, Saha S, Satapathy BK. Recent advances in polymer scaffolds for biomedical applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 33:342-408. [PMID: 34606739 DOI: 10.1080/09205063.2021.1989569] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The review provides insights into current advancements in electrospinning-assisted manufacturing for optimally designing biomedical devices for their prospective applications in tissue engineering, wound healing, drug delivery, sensing, and enzyme immobilization, and others. Further, the evolution of electrospinning-based hybrid biomedical devices using a combined approach of 3 D printing and/or film casting/molding, to design dimensionally stable membranes/micro-nanofibrous assemblies/patches/porous surfaces, etc. is reported. The influence of various electrospinning parameters, polymeric material, testing environment, and other allied factors on the morphological and physico-mechanical properties of electrospun (nano-/micro-fibrous) mats (EMs) and fibrous assemblies have been compiled and critically discussed. The spectrum of operational research and statistical approaches that are now being adopted for efficient optimization of electrospinning process parameters so as to obtain the desired response (physical and structural attributes) has prospectively been looked into. Further, the present review summarizes some current limitations and future perspectives for modeling architecturally novel hybrid 3 D/selectively textured structural assemblies, such as biocompatible, non-toxic, and bioresorbable mats/scaffolds/membranes/patches with apt mechanical stability, as biological substrates for various regenerative and non-regenerative therapeutic devices.
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Affiliation(s)
- Deepika Sharma
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Sampa Saha
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi, India
| | - Bhabani K Satapathy
- Department of Materials Science and Engineering, Indian Institute of Technology Delhi, New Delhi, India
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3
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Structurally optimized suture resistant polylactic acid (PLA)/poly (є-caprolactone) (PCL) blend based engineered nanofibrous mats. J Mech Behav Biomed Mater 2021; 116:104331. [PMID: 33517099 DOI: 10.1016/j.jmbbm.2021.104331] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/15/2020] [Accepted: 01/12/2021] [Indexed: 12/23/2022]
Abstract
The structural fabrication and optimization of polylactic acid (PLA)/poly (є-caprolactone) (PCL) blend-based bead-free electrospun nanofibrous mats (ENMs) has been carried out by using Response Surface Methodology (RSM) and Taguchi design of experiments (DoE). From the three control parameters i.e., PCL content, N, N- dimethylformamide (DMF) content, and electrospinning solution concentration, the optimal parametric combinations for minimizing the bead defects amongst ENMs were obtained. The parametric optimization outcomes remained identical, from both RSM and Taguchi approaches, irrespective of the difference in the number of experimental trials. The experimental validation of the predicted results from Taguchi-design showed an excellent agreement with >95% accuracy concerning minimization of bead defects and average fiber diameter. The solution concentration was a key determinant in controlling the gross fiber morphology. The quasi-static mechanical response of the optimally designed ENMs showed a distinct role in structural aspects of fibers. The failure responses revealed the role of the structural network of ENMs in controlling the failure stress and network collapse that was also reiterated upon the outcomes of suture retention strength assessment. The optimally designed ENM structures showed a correspondingly optimal level of suture resistance, where fine fibers offered higher resistance to suture failure due to the cooperative network effects unlike the relatively coarse fiber-based ENMs undergoing collapse attributed to fiber buckling and fiber slippage in the labile structural network.
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Flaig F, Ragot H, Simon A, Revet G, Kitsara M, Kitasato L, Hébraud A, Agbulut O, Schlatter G. Design of Functional Electrospun Scaffolds Based on Poly(glycerol sebacate) Elastomer and Poly(lactic acid) for Cardiac Tissue Engineering. ACS Biomater Sci Eng 2020; 6:2388-2400. [DOI: 10.1021/acsbiomaterials.0c00243] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Florence Flaig
- ICPEES, Institut de Chimie et Procédés pour l’Energie l’Environnement et la Santé, CNRS UMR 7515, ECPM-Université de Strasbourg, 25 rue Becquerel, Strasbourg Cedex 2, 67087, France
| | - Hélène Ragot
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Alexandre Simon
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Gaëlle Revet
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Maria Kitsara
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Lisa Kitasato
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Anne Hébraud
- ICPEES, Institut de Chimie et Procédés pour l’Energie l’Environnement et la Santé, CNRS UMR 7515, ECPM-Université de Strasbourg, 25 rue Becquerel, Strasbourg Cedex 2, 67087, France
| | - Onnik Agbulut
- Institut de Biologie Paris-Seine (IBPS), CNRS UMR 8256, INSERM ERL U1164, Biological Adaptation and Ageing, Sorbonne Université, Paris 75005, France
| | - Guy Schlatter
- ICPEES, Institut de Chimie et Procédés pour l’Energie l’Environnement et la Santé, CNRS UMR 7515, ECPM-Université de Strasbourg, 25 rue Becquerel, Strasbourg Cedex 2, 67087, France
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5
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Zhao G, Bao X, Huang G, Xu F, Zhang X. Differential Effects of Directional Cyclic Stretching on the Functionalities of Engineered Cardiac Tissues. ACS APPLIED BIO MATERIALS 2019; 2:3508-3519. [DOI: 10.1021/acsabm.9b00414] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Guoxu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- School of Material Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, People’s Republic of China
| | - Xuejiao Bao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Guoyou Huang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
| | - Xiaohui Zhang
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
- Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
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6
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Sharma D, Satapathy BK. Mechanical Properties of Aliphatic Polyester‐Based Structurally Engineered Composite Patches. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/masy.201800153] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Deepika Sharma
- Department of Materials Science and EngineeringIndian Institute of Technology DelhiHauz KhasNew Delhi110016India
| | - Bhabani K. Satapathy
- Department of Materials Science and EngineeringIndian Institute of Technology DelhiHauz KhasNew Delhi110016India
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Canbolat MF, Savas HB, Gultekin F. Enzymatic behavior of laccase following interaction with γ-CD and immobilization into PCL nanofibers. Anal Biochem 2017; 528:13-18. [DOI: 10.1016/j.ab.2017.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Revised: 03/31/2017] [Accepted: 04/13/2017] [Indexed: 10/19/2022]
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8
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Merlettini A, Pandini S, Agnelli S, Gualandi C, Paderni K, Messori M, Toselli M, Focarete ML. Facile fabrication of shape memory poly(ε-caprolactone) non-woven mat by combining electrospinning and sol–gel reaction. RSC Adv 2016. [DOI: 10.1039/c6ra05490k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A smart combination of electrospinning and sol–gel reaction enabled to develop crosslinked poly(ε-caprolactone) fibrous mats showing excellent shape memory properties.
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Affiliation(s)
- Andrea Merlettini
- Department of Chemistry “G. Ciamician” and INSTM UdR of Bologna
- University of Bologna
- 40126 Bologna
- Italy
| | - Stefano Pandini
- Department of Mechanical and Industrial Engineering of Brescia
- University of Brescia
- 25123 Brescia
- Italy
| | - Silvia Agnelli
- Department of Mechanical and Industrial Engineering of Brescia
- University of Brescia
- 25123 Brescia
- Italy
| | - Chiara Gualandi
- Department of Chemistry “G. Ciamician” and INSTM UdR of Bologna
- University of Bologna
- 40126 Bologna
- Italy
| | - Katia Paderni
- Department of Engineering “E. Ferrari” and INSTM Udr of Modena and Reggio Emilia
- University of Modena and Reggio Emilia
- 41125 Modena
- Italy
| | - Massimo Messori
- Department of Engineering “E. Ferrari” and INSTM Udr of Modena and Reggio Emilia
- University of Modena and Reggio Emilia
- 41125 Modena
- Italy
| | - Maurizio Toselli
- Department of Industrial Chemistry “Toso Montanari”
- University of Bologna
- 40136 Bologna
- Italy
| | - Maria Letizia Focarete
- Department of Chemistry “G. Ciamician” and INSTM UdR of Bologna
- University of Bologna
- 40126 Bologna
- Italy
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9
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Sabbatier G, Abadie P, Dieval F, Durand B, Laroche G. Evaluation of an air spinning process to produce tailored biosynthetic nanofibre scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 35:347-53. [DOI: 10.1016/j.msec.2013.11.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 10/05/2013] [Accepted: 11/02/2013] [Indexed: 01/09/2023]
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10
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Li L, Yang G, Li J, Ding S, Zhou S. Cell behaviors on magnetic electrospun poly-D, L-lactide nanofibers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 34:252-61. [PMID: 24268257 DOI: 10.1016/j.msec.2013.09.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 08/12/2013] [Accepted: 09/18/2013] [Indexed: 10/26/2022]
Abstract
It is widely accepted that magnetic fields have an influence on cell behaviors, but the effects are still not very clear since the magnetic field's type, intensity and exposure time are different. In this study, a static magnetic field (SMF) in moderate intensity (10mT) was employed to investigate its effect on osteoblast and 3T3 fibroblast cell behaviors cultured respectively with magnetic polymer nanofiber mats. The magnetic mats composed of random oriented or aligned polymer nanofibers were fabricated by electrospinning the mixed solution of poly-d, l-lactide (PLA) and iron oxide nanoparticles. The fiber morphology was characterized by scanning electron microscopy (SEM), the nanoparticle distribution in fiber matrix was measured with transmission electron microscope (TEM). Mechanical properties of nanofiber mats are studied by uniaxial tensile test. The results showed the nanofibers loaded with magnetic nanoparticles displayed excellent magnetic responsibility and biodegradability. In vitro cytotoxicity analysis demonstrated that the osteoblast proliferation of all fiber mats stimulated with or without SMF was increased with the increase of the culturing days. Furthermore, in the horizontal SMFs, cell orientation tended to deviate from nanofiber orientation to field direction while the nanofiber orientation is perpendicular to the field direction, while the horizonal direction of SMFs could also direct the cell growth orientation. The magnetic nanofiber mats provide a potential platform to explore the cell behaviors under the stimulation of external magnetic field.
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Affiliation(s)
- Long Li
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China
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11
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Properties of electrospun pollock gelatin/poly(vinyl alcohol) and pollock gelatin/poly(lactic acid) fibers. Int J Biol Macromol 2013; 55:214-20. [PMID: 23352992 DOI: 10.1016/j.ijbiomac.2013.01.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2012] [Accepted: 01/11/2013] [Indexed: 11/23/2022]
Abstract
Pollock gelatin/poly(vinyl alcohol) (PVA) fibers were electrospun using deionized water as the solvent and pollock gelatin/poly(lactic acid) (PLA) fibers were electrospun using 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) as the solvent. The chemical, thermal, and thermal stability properties were examined for the electrospun samples. The electrospun PVA samples generally had thinner and more uniform fibers than the electrospun PLA samples. For the PVA samples, an increase in total solids content and PVA to gelatin ratio generally resulted in higher average fiber diameter values and wider diameter distributions. Pollock gelatin in both types of electrospun samples remained amorphous. The PVA in electrospun samples had comparable melting temperatures to that of neat PVA, whereas the PLA in electrospun samples had slightly lower melting temperatures than that of neat PLA. Also, the PLA in electrospun samples had crystallization temperatures approximately 30 °C lower than that in neat PLA. This was due to better alignment of PLA chains during electrospinning, which resulted in the chains being more readily crystallized at lower temperatures. In addition, the electrospun PVA samples completely dissolved in water at room temperature after soaking for one day, whereas the electrospun PLA samples remained intact even after soaking for three days.
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12
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Rizvi MS, Kumar P, Katti DS, Pal A. Mathematical model of mechanical behavior of micro/nanofibrous materials designed for extracellular matrix substitutes. Acta Biomater 2012; 8:4111-22. [PMID: 22842037 DOI: 10.1016/j.actbio.2012.07.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2012] [Revised: 07/17/2012] [Accepted: 07/19/2012] [Indexed: 11/19/2022]
Abstract
Electrospun micro/nanofibrous biomaterials are widely used as extracellular matrix substitutes in tissue engineering applications because of their structural and mechanical properties. To explore the influence of microstructure on the mechanical behavior of fibrous material, a mathematical model of the fiber system was developed. The model describes the microstructural properties of a fibrous matrix using a probability density function, and enables study of their mechanical properties. The results from the mathematical model were validated by qualitative comparison with the experimental results of mechanical testing of polystyrene electrospun nanofibrous materials. The analyses show a trend of three-phase load-displacement behavior. Initially, as an increasing number of fibers are recruited for load bearing, the load-displacement curve has a 'J'-shaped toe region, which is followed by a nearly linear load-displacement curve, in which the number of load-bearing fibers remains nearly steady. Finally, there is a phase when the load-displacement curve descends, indicating failure of the material. The increase in flexibility of the fibrous material makes it stronger, but the randomness of fiber orientation makes the fibrous structure more flexible at the cost of lower strength. The measured mechanical properties of a fibrous matrix were also observed to be dependent on sample size. Therefore, the analyses establish a clear link between the structure and strength of fibrous materials for optimized design and fabrication of fibrous biomaterials with targeted use in tissue engineering, regenerative medicine and drug delivery. The model also establishes a need for standardization of experimental protocols for mechanical characterization of fibrous materials for consistency.
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Affiliation(s)
- M S Rizvi
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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13
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Canbolat MF, Tang C, Bernacki SH, Pourdeyhimi B, Khan S. Mammalian cell viability in electrospun composite nanofiber structures. Macromol Biosci 2011; 11:1346-56. [PMID: 21984502 DOI: 10.1002/mabi.201100108] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 05/21/2011] [Indexed: 01/18/2023]
Abstract
Incorporation of mammalian cells into nanofibers (cell electrospinning) and multilayered cell-nanofiber structures (cell layering) via electrospinning are promising techniques for tissue engineering applications. We investigate the viability of 3T3-L1 mouse fibroblasts after incorporation into poly(vinyl alcohol) nanofibers and multilayering with poly(caprolactone) nanofibers and analyze the possible factors that affect cell viability. We observe that cells do not survive cell electrospinning but survive cell layering. Assessing the factors involved in cell electrospinning, we find that dehydration and fiber stretching are the main causes of cell death. In cell layering, the choice of solvent is critical, as residual solvent in the electrospun fibers could be detrimental to the cells.
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Affiliation(s)
- Mehmet Fatih Canbolat
- Fiber and Polymer Science, College of Textiles North Carolina State University, 3427 College of Textiles, Raleigh, North Carolina 27695-8301, USA
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14
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Sencadas V, Costa CM, Botelho G, Caparrós C, Ribeiro C, Gómez-Ribelles JL, Lanceros-Mendez S. Thermal Properties of Electrospun Poly(Lactic Acid) Membranes. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2011.597325] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- V. Sencadas
- a Centro/Departamento de Física , Universidade do Minho , Braga , Portugal
| | - C. M. Costa
- b CeNTI—Centre for Nanotechnology and Smart Materials , Vila Nova de Famalicão , Portugal
| | - G. Botelho
- c Departamento Química, Centro de Química , Universidade do Minho , Braga , Portugal
| | - C. Caparrós
- b CeNTI—Centre for Nanotechnology and Smart Materials , Vila Nova de Famalicão , Portugal
| | - C. Ribeiro
- a Centro/Departamento de Física , Universidade do Minho , Braga , Portugal
| | - J. L. Gómez-Ribelles
- d Centro de Biomateriales e Ingeniería Tisular , Universidad Politécnica de Valencia , Valencia , Spain
- e Centro de Investigación Príncipe Felipe , Valencia , Spain
- f CIBER en Bioingeniería , Biomateriales y Nanomedicina , Valencia , Spain
| | - S. Lanceros-Mendez
- a Centro/Departamento de Física , Universidade do Minho , Braga , Portugal
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15
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He C, Xu X, Zhang F, Cao L, Feng W, Wang H, Mo X. Fabrication of fibrinogen/P(LLA-CL) hybrid nanofibrous scaffold for potential soft tissue engineering applications. J Biomed Mater Res A 2011; 97:339-47. [DOI: 10.1002/jbm.a.33067] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 01/09/2011] [Accepted: 01/25/2011] [Indexed: 11/11/2022]
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16
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Mazinani S, Ajji A, Dubois C. Fundamental study of crystallization, orientation, and electrical conductivity of electrospun PET/carbon nanotube nanofibers. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22085] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Wang W, Barber AH. Diameter-dependent melting behaviour in electrospun polymer fibres. NANOTECHNOLOGY 2010; 21:225701. [PMID: 20453281 DOI: 10.1088/0957-4484/21/22/225701] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The melting temperature of individual electrospun polyethylene oxide (PEO) fibres was found using atomic force microscopy (AFM) topography imaging and nanomechanical measurements. The melting temperature of electrospun PEO fibres was observed to decrease with decreasing fibre diameter. A model predicting the size-dependent melting temperature in polymers based on surface area showed a good fit with our experimental data, indicating surface-mediated thermal behaviour.
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Affiliation(s)
- Wei Wang
- Department of Materials, School of Engineering and Materials Science, Queen Mary University of London, London, UK
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18
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Mechanical properties and biocompatibility of electrospun polylactide/poly(vinylidene fluoride) mats. JOURNAL OF POLYMER RESEARCH 2010. [DOI: 10.1007/s10965-010-9421-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Saeed K, Park SY. Preparation and characterization of multiwalled carbon nanotubes/polyacrylonitrile nanofibers. JOURNAL OF POLYMER RESEARCH 2009. [DOI: 10.1007/s10965-009-9341-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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20
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Tian S, Ogata N, Shimada N, Nakane K, Ogihara T, Yu M. Melt electrospinning from poly(L-lactide) rods coated with poly(ethylene-co-vinyl alcohol). J Appl Polym Sci 2009. [DOI: 10.1002/app.30096] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Drilling S, Gaumer J, Lannutti J. Fabrication of burst pressure competent vascular grafts via electrospinning: effects of microstructure. J Biomed Mater Res A 2009; 88:923-34. [PMID: 18384169 DOI: 10.1002/jbm.a.31926] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In this work, electrospun tubes of interest for vascular tissue engineering were fabricated and evaluated for burst pressure and suture retention strength (SRS) in the same context as tensile strength providing a direct, novel comparison. Tubes could be fabricated displaying average burst pressures up to 4000 mmHg--well above the standard of 2000 mmHg--and SRS values matching those of relevant natural tissues. Surprisingly, highly oriented fiber and maximal tensile properties are not absolutely necessary to attain clinically adequate burst pressures. The ability to resist bursting is clearly related to both initial solution solids loading and electrospinning deposition time. We make novel in situ observations of the relative microstructural characteristics of failure during bursting, and connect this to the conditions used to fabricate the graft. Processes typically thought to promote fiber alignment are, in fact, highly condition-dependent and do not always provide superior properties. In fact, electrospun structures displaying no discernable alignment could achieve burst pressures regarded clinically sufficient. The properties of individual electrospun fiber clearly do not fully dictate macroscale properties. Normal background levels of point bonding are enhanced by increased rotational speeds, and can have effects on properties more dominant than those of alignment.
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Affiliation(s)
- Sarah Drilling
- Department of Materials Science and Engineering, The Ohio State University, 2041 College Rd., Columbus, Ohio 43210, USA
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Saeed K, Park SY, Haider S, Baek JB. In situ Polymerization of Multi-Walled Carbon Nanotube/Nylon-6 Nanocomposites and Their Electrospun Nanofibers. NANOSCALE RESEARCH LETTERS 2009; 4:39-46. [PMID: 20596470 PMCID: PMC2893824 DOI: 10.1007/s11671-008-9199-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Accepted: 10/23/2008] [Indexed: 05/15/2023]
Abstract
Multiwalled carbon nanotube/nylon-6 nanocomposites (MWNT/nylon-6) were prepared by in situ polymerization, whereby functionalized MWNTs (F-MWNTs) and pristine MWNTs (P-MWNTs) were used as reinforcing materials. The F-MWNTs were functionalized by Friedel-Crafts acylation, which introduced aromatic amine (COC(6)H(4)-NH(2)) groups onto the side wall. Scanning electron microscopy (SEM) images obtained from the fractured surfaces of the nanocomposites showed that the F-MWNTs in the nylon-6 matrix were well dispersed as compared to those of the P-MWNTs. Both nanocomposites could be electrospun into nanofibers in which the MWNTs were embedded and oriented along the nanofiber axis, as confirmed by transmission electron microscopy. The specific strength and modulus of the MWNTs-reinforced nanofibers increased as compared to those of the neat nylon-6 nanofibers. The crystal structure of the nylon-6 in the MWNT/nylon-6 nanofibers was mostly gamma-phase, although that of the MWNT/nylon-6 films, which were prepared by hot-pressing the pellets between two aluminum plates and then quenching them in icy water, was mostly alpha-phase, indicating that the shear force during electrospinning might favor the gamma-phase, similarly to the conventional fiber spinning.
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Affiliation(s)
- Khalid Saeed
- Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-dong, Buk-gu, Daegu, 702-701, South Korea
| | - Soo-Young Park
- Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-dong, Buk-gu, Daegu, 702-701, South Korea
| | - Sajjad Haider
- Department of Polymer Science, Kyungpook National University, #1370 Sankyuk-dong, Buk-gu, Daegu, 702-701, South Korea
| | - Jong-Beom Baek
- School of Chemical Engineering, Chungbuk National University, #12, Gaeshin, Heungduk, Cheongju, Chungbuk, 361-763, South Korea
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23
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Study of charge storage in the nanofibrous poly(ethylene terephthalate) electrets prepared by electrospinning or by corona discharge method. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.04.027] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ner Y, Grote JG, Stuart JA, Sotzing GA. Enhanced fluorescence in electrospun dye-doped DNA nanofibers. SOFT MATTER 2008; 4:1448-1453. [PMID: 32907111 DOI: 10.1039/b717581g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Nanoscale fibers and non-woven meshes composed of DNA complexed with a cationic surfactant (cetyltrimethylammonium chloride, or CTMA) have been fabricated through electrospinning. The DNA-CTMA complex can be electrospun far more easily than DNA alone. Incorporation of a hemicyanine chromophore resulted in materials that demonstrated amplified emission as compared to thin films of identical composition. The enhanced fluorescence resulted from both the fiber morphology (5-6-fold amplification) and specific interactions (groove-binding) between the chromophore and DNA (18-21-fold amplification). The mechanical properties of freestanding electrospun non-woven fiber meshes were evaluated, and revealed stress-induced alignment of DNA strands within the DNA-CTMA fibers. These fiber-based materials are easily processable into a variety of morphologies, and have promise for applications in molecular electronics, filtration, sensors, and the medical industry.
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Affiliation(s)
- Yogesh Ner
- The Polymer Program, Institute of Materials Science, University of Connecticut, 97 N. Eagleville Rd, Storrs, CT, USA
| | - James G Grote
- US Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RXPS, Wright-Patterson Air Force Base, Ohio, USA
| | - Jeffrey A Stuart
- Center for Nanobionics, Institute of Materials Science, University of Connecticut, 97 N. Eagleville Rd, Storrs, CT, USA and Department of Chemistry, University of Connecticut, 55 N. Eagleville Rd, Storrs, CT, USA.
| | - Gregory A Sotzing
- The Polymer Program, Institute of Materials Science, University of Connecticut, 97 N. Eagleville Rd, Storrs, CT, USA and Department of Chemistry, University of Connecticut, 55 N. Eagleville Rd, Storrs, CT, USA.
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25
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OYAMA HT, SHIDA S. Polymer Blends Composed of Poly( D, L-lactic acid)/ L-Lactide Copolymers. KOBUNSHI RONBUNSHU 2008. [DOI: 10.1295/koron.65.253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Hideko T. OYAMA
- Department of Science, Rikkyo University
- National Institute of Advanced Industrial Science and Technology
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26
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Hwang J, Muth J, Ghosh T. Electrical and mechanical properties of carbon-black-filled, electrospun nanocomposite fiber webs. J Appl Polym Sci 2007. [DOI: 10.1002/app.25914] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Johnson J, Ghosh A, Lannutti J. Microstructure-property relationships in a tissue-engineering scaffold. J Appl Polym Sci 2007. [DOI: 10.1002/app.25965] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Fujihara K, Kotaki M, Ramakrishna S. Guided bone regeneration membrane made of polycaprolactone/calcium carbonate composite nano-fibers. Biomaterials 2005; 26:4139-47. [PMID: 15664641 DOI: 10.1016/j.biomaterials.2004.09.014] [Citation(s) in RCA: 363] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2004] [Accepted: 09/10/2004] [Indexed: 11/23/2022]
Abstract
In this study, new type of guided bone regeneration (GBR) membranes were fabricated by polycaprolactone (PCL)/CaCO3 composite nano-fibers with two different PCL to calcium carbonate (CaCO3) ratios (PCL:CaCO3=75:25 wt% and 25:75 wt%). The composite nano-fibers were successfully fabricated by electrospinning method and CaCO3 nano-particles on the surface of nano-fibers were confirmed by energy disperse X-ray (EDX) analysis. In order to achieve mechanical stability of GBR membranes, composite nano-fibers were spun on PCL nano-fibrous membranes which has high tensile strength, i.e., the membranes consist of two layers of functional layer (PCL/CaCO3) and mechanical support layer (PCL). Two different GBR membranes were prepared, i.e., GBR membrane (A)=PCL:CaCO3=75:25 wt%+PCL, GBR membrane (B)=PCL:CaCO3=25:75 wt%+PCL. Osteoblast attachment and proliferation of GBR membrane (A) and (B) were discussed by MTS assay and scanning electron microscope (SEM) observation. As a result, absorbance intensity of GBR membrane (A) and tissue culture polystyrene (TCPS) increased during 5 days seeding time. In contrast, although absorbance intensity of GBR membrane (B) also increased, its value was lower than membrane (A). SEM observation showed that no significant difference in osteoblast attachment manner was seen on GBR membrane (A) and (B). Because of good cell attachment manner, there is a potential to utilize PCL/CaCO3 composite nano-fibers to GBR membranes.
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Affiliation(s)
- K Fujihara
- Division of Bioengineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576.
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