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Alharbi N, Guthold M. Mechanical properties of hydrated electrospun polycaprolactone (PCL) nanofibers. J Mech Behav Biomed Mater 2024; 155:106564. [PMID: 38749267 DOI: 10.1016/j.jmbbm.2024.106564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 04/18/2024] [Accepted: 04/26/2024] [Indexed: 05/28/2024]
Abstract
Polycaprolactone (PCL) nanofibers are a promising material for biomedical applications due to their biocompatibility, slow degradation rate, and thermal stability. We electrospun PCL fibers onto a striated substrate with 12 μm wide ridges and grooves and determined their mechanical properties in an aqueous solution with a combined atomic force/inverted optical microscopy technique. Fiber diameters, D, ranged from 27 to 280 nm. The hydrated PCL fibers had an extensibility (breaking strain), εmax, of 137%. The Young's modulus, E, and tensile strength, σT, showed a strong dependence on fiber diameter, D; decreasing steeply with increasing diameter, following empirical equations E(D)=(4.3∙103∙e-D51nm+1.1∙102) MPa and σT(D)=(2.6∙103∙e-D55nm+0.6∙102) MPa. Incremental stress-strain measurements were employed to investigate the viscoelastic behavior of these fibers. The fibers exhibited stress relaxation with a fast and slow relaxation time of 3.7 ± 1.2 s and 23 ± 8 s and these experiments also allowed the determination of the elastic and viscous moduli. Cyclic stress-strain curves were used to determine that the elastic limit of the fibers, εelastic, is between 19% and 36%. These curves were also used to determine that these fibers showed small energy losses (<20%) at small strains (ε < 10%), and over 50% energy loss at large strains (ε > 50%), asymptotically approaching 61%, as Eloss=61%·(1-e-0.04*ε). Our work is the first mechanical characterization of hydrated electrospun PCL nanofibers; all previous experiments were performed on dry PCL fibers, to which we will compare our data.
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Affiliation(s)
- Nouf Alharbi
- Department of Physics, Wake Forest University, Winston-Salem, NC, 27109, USA
| | - Martin Guthold
- Department of Physics, Wake Forest University, Winston-Salem, NC, 27109, USA; Center for Functional Materials, Wake Forest University, Winston-Salem, NC, 27109, USA.
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2
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Changizi S, Sameti M, Bazemore GL, Chen H, Bashur CA. Epsin Mimetic UPI Peptide Delivery Strategies to Improve Endothelization of Vascular Grafts. Macromol Biosci 2023; 23:e2300073. [PMID: 37117010 DOI: 10.1002/mabi.202300073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Indexed: 04/30/2023]
Abstract
Endothelialization of engineered vascular grafts for replacement of small-diameter coronary arteries remains a critical challenge. The ability for an acellular vascular graft to promote endothelial cell (EC) recruitment in the body would be very beneficial. This study investigated epsins as a target since they are involved in internalization of vascular endothelial growth factor receptor 2. Specifically, epsin-mimetic UPI peptides are delivered locally from vascular grafts to block epsin activity and promote endothelialization. The peptide delivery from fibrin coatings allowed for controlled loading and provided a significant improvement in EC attachment, migration, and growth in vitro. The peptides have even more important impacts after grafting into rat abdominal aortae. The peptides prevented graft thrombosis and failure that is observed with a fibrin coating alone. They also modulated the in vivo remodeling. The grafts are able to remodel without the formation of a thick fibrous capsule on the adventitia with the 100 µg mL-1 peptide-loaded condition, and this condition enabled the formation of a functional EC monolayer in the graft lumen after only 1 week. Overall, this study demonstrated that the local delivery of UPI peptides is a promising strategy to improve the performance of vascular grafts.
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Affiliation(s)
- Shirin Changizi
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, 32901, USA
| | - Mahyar Sameti
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, 32901, USA
| | - Gabrielle L Bazemore
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, 32901, USA
| | - Hong Chen
- Vascular Biology Program, Boston Children's Hospital, Harvard Medical School, Boston, MA, 02115, USA
| | - Chris A Bashur
- Department of Biomedical Engineering, Florida Institute of Technology, Melbourne, FL, 32901, USA
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Sanhueza C, Hermosilla J, Klein C, Chaparro A, Valdivia-Gandur I, Beltrán V, Acevedo F. Osteoinductive Electrospun Scaffold Based on PCL-Col as a Regenerative Therapy for Peri-Implantitis. Pharmaceutics 2023; 15:1939. [PMID: 37514125 PMCID: PMC10386026 DOI: 10.3390/pharmaceutics15071939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 06/22/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
Peri-implantitis is a serious condition affecting dental implants that can lead to implant failure and loss of osteointegration if is not diagnosed and treated promptly. Therefore, the development of new materials and approaches to treat this condition is of great interest. In this study, we aimed to develop an electrospun scaffold composed of polycaprolactone (PCL) microfibers loaded with cholecalciferol (Col), which has been shown to promote bone tissue regeneration. The physical and chemical properties of the scaffold were characterized, and its ability to support the attachment and proliferation of MG-63 osteoblast-like cells was evaluated. Our results showed that the electrospun PCL-Col scaffold had a highly porous structure and good mechanical properties. The resulting scaffolds had an average fiber diameter of 2-9 μm and high elongation at break (near six-fold under dry conditions) and elasticity (Young modulus between 0.9 and 9 MPa under dry conditions). Furthermore, the Col-loaded scaffold was found to decrease cell proliferation when the Col content in the scaffolds increased. However, cytotoxicity analysis proved that the PCL scaffold on its own releases more lactate dehydrogenase into the medium than the scaffold containing Col at lower concentrations (PCL-Col A, PCL-Col B, and PCL-Col C). Additionally, the Col-loaded scaffold was shown to effectively promote the expression of alkaline phosphatase and additionally increase the calcium fixation in MG-63 cells. Our findings suggest that the electrospun membrane loaded with Col can potentially treat peri-implantitis by promoting bone formation. However, further studies are needed to assess the efficacy and safety of this membrane in vivo.
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Affiliation(s)
- Claudia Sanhueza
- Center of Excellence in Translational Medicine-Scientific and Technology Bioresource Nucleus (CEMT-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco 4780000, Chile
| | - Jeyson Hermosilla
- Doctorado en Ciencias de Recursos Naturales, Universidad de La Frontera, Casilla 54-F, Temuco 4780000, Chile
| | - Catherine Klein
- Department of Periodontology, Center for Biomedical Research, Faculty of Dentistry, Universidad de Los Andes, Av. Plaza 2501, Las Condes, Santiago 7620157, Chile
| | - Alejandra Chaparro
- Department of Periodontology, Center for Biomedical Research, Faculty of Dentistry, Universidad de Los Andes, Av. Plaza 2501, Las Condes, Santiago 7620157, Chile
| | - Iván Valdivia-Gandur
- Biomedical Department, Universidad de Antofagasta, Avenida Angamos 601, Antofagasta 1270300, Chile
| | - Víctor Beltrán
- Clinical Investigation and Dental Innovation Center (CIDIC), Dental School, Universidad de La Frontera, Temuco 4780000, Chile
| | - Francisca Acevedo
- Center of Excellence in Translational Medicine-Scientific and Technology Bioresource Nucleus (CEMT-BIOREN), Faculty of Medicine, Universidad de La Frontera, Temuco 4780000, Chile
- Department of Basic Sciences, Faculty of Medicine, Universidad de La Frontera, Casilla 54-D, Temuco 4780000, Chile
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Alharbi N, Brigham A, Guthold M. The Mechanical Properties of Blended Fibrinogen:Polycaprolactone (PCL) Nanofibers. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1359. [PMID: 37110944 PMCID: PMC10145448 DOI: 10.3390/nano13081359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/10/2023] [Accepted: 04/11/2023] [Indexed: 06/19/2023]
Abstract
Electrospinning is a process to produce versatile nanoscale fibers. In this process, synthetic and natural polymers can be combined to produce novel, blended materials with a range of physical, chemical, and biological properties. We electrospun biocompatible, blended fibrinogen:polycaprolactone (PCL) nanofibers with diameters ranging from 40 nm to 600 nm, at 25:75 and 75:25 blend ratios and determined their mechanical properties using a combined atomic force/optical microscopy technique. Fiber extensibility (breaking strain), elastic limit, and stress relaxation times depended on blend ratios but not fiber diameter. As the fibrinogen:PCL ratio increased from 25:75 to 75:25, extensibility decreased from 120% to 63% and elastic limit decreased from a range between 18% and 40% to a range between 12% and 27%. Stiffness-related properties, including the Young's modulus, rupture stress, and the total and relaxed, elastic moduli (Kelvin model), strongly depended on fiber diameter. For diameters less than 150 nm, these stiffness-related quantities varied approximately as D-2; above 300 nm the diameter dependence leveled off. 50 nm fibers were five-ten times stiffer than 300 nm fibers. These findings indicate that fiber diameter, in addition to fiber material, critically affects nanofiber properties. Drawing on previously published data, a summary of the mechanical properties for fibrinogen:PCL nanofibers with ratios of 100:0, 75:25, 50:50, 25:75 and 0:100 is provided.
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Affiliation(s)
| | | | - Martin Guthold
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA; (N.A.)
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Al-Abduljabbar A, Farooq I. Electrospun Polymer Nanofibers: Processing, Properties, and Applications. Polymers (Basel) 2022; 15:polym15010065. [PMID: 36616414 PMCID: PMC9823865 DOI: 10.3390/polym15010065] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/08/2022] [Accepted: 12/13/2022] [Indexed: 12/28/2022] Open
Abstract
Electrospun polymer nanofibers (EPNF) constitute one of the most important nanomaterials with diverse applications. An overall review of EPNF is presented here, starting with an introduction to the most attractive features of these materials, which include the high aspect ratio and area to volume ratio as well as excellent processability through various production techniques. A review of these techniques is featured with a focus on electrospinning, which is the most widely used, with a detailed description and different types of the process. Polymers used in electrospinning are also reviewed with the solvent effect highlighted, followed by a discussion of the parameters of the electrospinning process. The mechanical properties of EPNF are discussed in detail with a focus on tests and techniques used for determining them, followed by a section for other properties including electrical, chemical, and optical properties. The final section is dedicated to the most important applications for EPNF, which constitute the driver for the relentless pursuit of their continuous development and improvement. These applications include biomedical application such as tissue engineering, wound healing and dressing, and drug delivery systems. In addition, sensors and biosensors applications, air filtration, defense applications, and energy devices are reviewed. A brief conclusion is presented at the end with the most important findings and directions for future research.
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Advances in Electrospun Hybrid Nanofibers for Biomedical Applications. NANOMATERIALS 2022; 12:nano12111829. [PMID: 35683685 PMCID: PMC9181850 DOI: 10.3390/nano12111829] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/18/2022] [Accepted: 05/24/2022] [Indexed: 02/04/2023]
Abstract
Electrospun hybrid nanofibers, based on functional agents immobilized in polymeric matrix, possess a unique combination of collective properties. These are beneficial for a wide range of applications, which include theranostics, filtration, catalysis, and tissue engineering, among others. The combination of functional agents in a nanofiber matrix offer accessibility to multifunctional nanocompartments with significantly improved mechanical, electrical, and chemical properties, along with better biocompatibility and biodegradability. This review summarizes recent work performed for the fabrication, characterization, and optimization of different hybrid nanofibers containing varieties of functional agents, such as laser ablated inorganic nanoparticles (NPs), which include, for instance, gold nanoparticles (Au NPs) and titanium nitride nanoparticles (TiNPs), perovskites, drugs, growth factors, and smart, inorganic polymers. Biocompatible and biodegradable polymers such as chitosan, cellulose, and polycaprolactone are very promising macromolecules as a nanofiber matrix for immobilizing such functional agents. The assimilation of such polymeric matrices with functional agents that possess wide varieties of characteristics require a modified approach towards electrospinning techniques such as coelectrospinning and template spinning. Additional focus within this review is devoted to the state of the art for the implementations of these approaches as viable options for the achievement of multifunctional hybrid nanofibers. Finally, recent advances and challenges, in particular, mass fabrication and prospects of hybrid nanofibers for tissue engineering and biomedical applications have been summarized.
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Duval C, Baranauskas A, Feller T, Ali M, Cheah LT, Yuldasheva NY, Baker SR, McPherson HR, Raslan Z, Bailey MA, Cubbon RM, Connell SD, Ajjan RA, Philippou H, Naseem KM, Ridger VC, Ariëns RAS. Elimination of fibrin γ-chain cross-linking by FXIIIa increases pulmonary embolism arising from murine inferior vena cava thrombi. Proc Natl Acad Sci U S A 2021; 118:e2103226118. [PMID: 34183396 PMCID: PMC8271579 DOI: 10.1073/pnas.2103226118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The onset of venous thromboembolism, including pulmonary embolism, represents a significant health burden affecting more than 1 million people annually worldwide. Current treatment options are based on anticoagulation, which is suboptimal for preventing further embolic events. In order to develop better treatments for thromboembolism, we sought to understand the structural and mechanical properties of blood clots and how this influences embolism in vivo. We developed a murine model in which fibrin γ-chain cross-linking by activated Factor XIII is eliminated (FGG3X) and applied methods to study thromboembolism at whole-body and organ levels. We show that FGG3X mice have a normal phenotype, with overall coagulation parameters and platelet aggregation and function largely unaffected, except for total inhibition of fibrin γ-chain cross-linking. Elimination of fibrin γ-chain cross-linking resulted in thrombi with reduced strength that were prone to fragmentation. Analysis of embolism in vivo using Xtreme optical imaging and light sheet microscopy demonstrated that the elimination of fibrin γ-chain cross-linking resulted in increased embolization without affecting clot size or lysis. Our findings point to a central previously unrecognized role for fibrin γ-chain cross-linking in clot stability. They also indirectly indicate mechanistic targets for the prevention of thrombosis through selective modulation of fibrin α-chain but not γ-chain cross-linking by activated Factor XIII to reduce thrombus size and burden, while maintaining clot stability and preventing embolism.
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Affiliation(s)
- Cédric Duval
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Adomas Baranauskas
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Tímea Feller
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Majid Ali
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Lih T Cheah
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Nadira Y Yuldasheva
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Stephen R Baker
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Helen R McPherson
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Zaher Raslan
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Marc A Bailey
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Richard M Cubbon
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Simon D Connell
- School of Physics and Astronomy, University of Leeds, Leeds LS2 3AR, United Kingdom
| | - Ramzi A Ajjan
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Helen Philippou
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Khalid M Naseem
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom
| | - Victoria C Ridger
- Department of Infection, Immunity and Cardiovascular Disease, The Medical School, University of Sheffield, Sheffield S10 2RX, United Kingdom
| | - Robert A S Ariëns
- Leeds Thrombosis Collective, Discovery & Translational Science Department, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds LS2 9NL, United Kingdom;
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Yesudasan S, Averett RD. Fracture mechanics analysis of fibrin fibers using mesoscale and continuum level methods. INFORMATICS IN MEDICINE UNLOCKED 2021; 23. [PMID: 33981824 PMCID: PMC8112576 DOI: 10.1016/j.imu.2021.100524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Computational models for simulating and predicting fibrin fiber fracture are important tools for studying bulk mechanical properties and mechanobiological response of fibrin networks in physiological conditions. In this work, we employed a new strategy to model the mechanical response of a single fibrin fiber using a collection of bundled protofibrils and modeled the time-dependent properties using discrete particle simulations. Using a systematic characterization of the parameters, this model can be used to mimic the elastic behavior of fibrin fibers accurately and also to simulate fibrin fiber fracture. In addition, a continuum model was modified and used to obtain the individual fibrin fiber fracture toughness properties. Using this model and the experimentally available fibrin mechanical properties, we predicted the range of fracture toughness (1 to k P a m ) values of a typical fibrin fiber of diameter 100 nm and its critical flaw size to rupture (~4 nm), both of which are not currently available in the literature. The models can be collectively used as a foundation for simulating the mechanical behavior of fibrin clots. Moreover, the tunable discrete mesoscopic model that was employed can be extended to simulate and estimate the mechanical properties of other biological or synthetic fibers.
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Affiliation(s)
- Sumith Yesudasan
- Department of Engineering Technology, Sam Houston State University, Huntsville, TX, 77341, USA
| | - Rodney D Averett
- School of Chemical, Materials, and Biomedical Engineering, College of Engineering, University of Georgia, Athens, GA, 30602, USA
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Suter N, Joshi A, Wunsch T, Graupner N, Stapelfeldt K, Radmacher M, Müssig J, Brüggemann D. Self-assembled fibrinogen nanofibers support fibroblast adhesion and prevent E. coli infiltration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112156. [PMID: 34082961 DOI: 10.1016/j.msec.2021.112156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 04/27/2021] [Accepted: 04/28/2021] [Indexed: 01/02/2023]
Abstract
Fibrinogen nanofibers hold great potential for wound healing applications since they mimic the native blood clot architecture and offer important binding sites to support fibroblast adhesion and migration. Recently, we introduced a new method of salt-induced self-assembly to prepare nanofibrous fibrinogen scaffolds. Here, we present our results on the mechanical properties of these scaffolds and their interaction with 3T3 fibroblasts and E. coli bacteria, which we used as model systems for wound healing. Hydrated, nanofibrous fibrinogen scaffolds showed a Young's modulus of 1.3 MPa, which is close to the range of native fibrin. 3T3 fibroblasts adhered and proliferated well on nanofibrous and planar fibrinogen up to 72 h with a less pronounced actin cytoskeleton on nanofibers in comparison to planar fibrinogen. Fibroblasts on nanofibers were smaller with many short filopodia while larger cells with few long filopodia were found on planar fibrinogen. Live cell tracking revealed higher migration velocities on nanofibers in comparison to planar fibrinogen. The growth of E. coli bacteria on nanofibrous fibrinogen was significantly reduced as compared to agar controls with no bacteria migrating through the nanofibers. In summary, we conclude that self-assembled fibrinogen nanofibers could become highly attractive as future scaffolds for wound healing applications.
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Affiliation(s)
- Naiana Suter
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Arundhati Joshi
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Timo Wunsch
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Nina Graupner
- The Biological Materials Group, Biomimetics-Innovation-Centre, HSB - City University of Applied Sciences Bremen, Neustadtswall 30, 28199 Bremen, Germany
| | - Karsten Stapelfeldt
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Manfred Radmacher
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
| | - Jörg Müssig
- The Biological Materials Group, Biomimetics-Innovation-Centre, HSB - City University of Applied Sciences Bremen, Neustadtswall 30, 28199 Bremen, Germany
| | - Dorothea Brüggemann
- Institute for Biophysics, University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany; MAPEX Center for Materials and Processes, University of Bremen, 28359 Bremen, Germany.
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Mondésert H, Bossard F, Favier D. Anisotropic electrospun honeycomb polycaprolactone scaffolds: Elaboration, morphological and mechanical properties. J Mech Behav Biomed Mater 2020; 113:104124. [PMID: 33091720 DOI: 10.1016/j.jmbbm.2020.104124] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/01/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022]
Abstract
Tissue engineering technology requires porous scaffolds, based on biomaterials, which have to mimic as closely as possible the morphological and anisotropic mechanical properties of the native tissue to substitute. Anisotropic fibrous scaffolds fabricated by template-assisted electrospinning are investigated in this study. Fibers of electrospun Polycaprolactone (PCL) were successfully arranged spatially into honeycomb structures by using well-shaped 3D micro-architected metal collectors. Fibrous scaffolds present 2 × 4 mm2 wide elementary patterns with low and high fiber density areas. Distinct regions of the honeycomb patterns were analyzed through SEM images revealing different fiber diameters with specific fiber orientation depending on the regions of interest. Tensile test experiments were carried out with an optical observation of the local deformation at the pattern scale, allowing the determination and analysis, at small and large deformation, of the axial and transverse local strains. The honeycomb patterned mats showed significantly different mechanical properties along the two orthogonal directions probing an anisotropic ratio of 4.2. Stress relaxation test was performed on scaffolds at 15% of strain. This measurement pointed out the low contribution of the viscosity of about 20% in the mechanical response of the scaffold. An orthotropic linear elastic model was consequently proposed to characterize the anisotropic behavior of the produced patterned membranes. This new versatile method to produce architected porous materials, adjustable to several polymers and structures, will provide appealing benefits for soft regenerative medicine application and the development of custom-made scaffolds.
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Affiliation(s)
- Hugues Mondésert
- Univ. Grenoble Alpes, CNRS, Grenoble INP(1), LRP, Grenoble, 38000, France; Univ. Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP(1), TIMC-IMAG, Grenoble, 38000, France
| | - Frédéric Bossard
- Univ. Grenoble Alpes, CNRS, Grenoble INP(1), LRP, Grenoble, 38000, France.
| | - Denis Favier
- Univ. Grenoble Alpes, CNRS, CHU Grenoble Alpes, Grenoble INP(1), TIMC-IMAG, Grenoble, 38000, France
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11
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Sharpe JM, Lee H, Hall AR, Bonin K, Guthold M. Mechanical Properties of Electrospun, Blended Fibrinogen: PCL Nanofibers. NANOMATERIALS 2020; 10:nano10091843. [PMID: 32942701 PMCID: PMC7558679 DOI: 10.3390/nano10091843] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/06/2020] [Accepted: 09/10/2020] [Indexed: 11/24/2022]
Abstract
Electrospun nanofibers manufactured from biocompatible materials are used in numerous bioengineering applications, such as tissue engineering, creating organoids or dressings, and drug delivery. In many of these applications, the morphological and mechanical properties of the single fiber affect their function. We used a combined atomic force microscope (AFM)/optical microscope technique to determine the mechanical properties of nanofibers that were electrospun from a 50:50 fibrinogen:PCL (poly-ε-caprolactone) blend. Both of these materials are widely available and biocompatible. Fibers were spun onto a striated substrate with 6 μm wide grooves, anchored with epoxy on the ridges and pulled with the AFM probe. The fibers showed significant strain softening, as the modulus decreased from an initial value of 1700 MPa (5–10% strain) to 110 MPa (>40% strain). Despite this extreme strain softening, these fibers were very extensible, with a breaking strain of 100%. The fibers exhibited high energy loss (up to 70%) and strains larger than 5% permanently deformed the fibers. These fibers displayed the stress–strain curves of a ductile material. We provide a comparison of the mechanical properties of these blended fibers with other electrospun and natural nanofibers. This work expands a growing library of mechanically characterized, electrospun materials for biomedical applications.
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Affiliation(s)
- Jacquelyn M. Sharpe
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA; (J.M.S.); (H.L.); (K.B.)
| | - Hyunsu Lee
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA; (J.M.S.); (H.L.); (K.B.)
| | - Adam R. Hall
- School of Biomedical Engineering and Sciences, Wake Forest School of Medicine, Virginia Tech-Wake Forest University, Winston-Salem, NC 27101, USA;
- Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Keith Bonin
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA; (J.M.S.); (H.L.); (K.B.)
- Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Martin Guthold
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, USA; (J.M.S.); (H.L.); (K.B.)
- Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
- Center for Functional Materials, Wake Forest University, Winston-Salem, NC 27109, USA
- Correspondence: ; Tel.: +1-336-758-4977
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12
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Bastidas JG, Maurmann N, da Silveira MR, Ferreira CA, Pranke P. Development of fibrous PLGA/fibrin scaffolds as a potential skin substitute. Biomed Mater 2020; 15:055014. [DOI: 10.1088/1748-605x/aba086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Zha F, Chen W, Zhang L, Yu D. Electrospun natural polymer and its composite nanofibrous scaffolds for nerve tissue engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 31:519-548. [DOI: 10.1080/09205063.2019.1697170] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Fangwen Zha
- Department of Chemistry, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Science, State Key Laboratory of Electrical Insulation and Power Equipments, Xi'an Jiaotong University, Xi'an, Shaanxi, PR China
| | - Wei Chen
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Xi’an Jiaotong University Health Science Center, Xi’an, Shaanxi, PR China
| | - Lifeng Zhang
- Department of Nanoengineering, Joint School of Nanoscience and Nanoengineering, NC A&T State University, Greensboro, NC, USA
| | - Demei Yu
- Department of Chemistry, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Science, State Key Laboratory of Electrical Insulation and Power Equipments, Xi'an Jiaotong University, Xi'an, Shaanxi, PR China
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14
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Nemati S, Kim SJ, Shin YM, Shin H. Current progress in application of polymeric nanofibers to tissue engineering. NANO CONVERGENCE 2019; 6:36. [PMID: 31701255 PMCID: PMC6838281 DOI: 10.1186/s40580-019-0209-y] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 10/14/2019] [Indexed: 05/23/2023]
Abstract
Tissue engineering uses a combination of cell biology, chemistry, and biomaterials to fabricate three dimensional (3D) tissues that mimic the architecture of extracellular matrix (ECM) comprising diverse interwoven nanofibrous structure. Among several methods for producing nanofibrous scaffolds, electrospinning has gained intense interest because it can make nanofibers with a porous structure and high specific surface area. The processing and solution parameters of electrospinning can considerably affect the assembly and structural morphology of the fabricated nanofibers. Electrospun nanofibers can be made from natural or synthetic polymers and blending them is a straightforward way to tune the functionality of the nanofibers. Furthermore, the electrospun nanofibers can be functionalized with various surface modification strategies. In this review, we highlight the latest achievements in fabricating electrospun nanofibers and describe various ways to modify the surface and structure of scaffolds to promote their functionality. We also summarize the application of advanced polymeric nanofibrous scaffolds in the regeneration of human bone, cartilage, vascular tissues, and tendons/ligaments.
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Affiliation(s)
- Sorour Nemati
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - Se-jeong Kim
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
| | - Young Min Shin
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116 Republic of Korea
| | - Heungsoo Shin
- Department of Bioengineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
- BK21 Plus Future Biopharmaceutical Human Resources Training and Research Team, 222 Wangsimni-ro, Seongdong-gu, Seoul, 04763 Republic of Korea
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15
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Watcharajittanont N, Putson C, Pripatnanont P, Meesane JI. Electrospun polyurethane fibrous membranes of mimicked extracellular matrix for periodontal ligament: Molecular behavior, mechanical properties, morphology, and osseointegration. J Biomater Appl 2019; 34:753-762. [DOI: 10.1177/0885328219874601] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Nattawat Watcharajittanont
- Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Chatchai Putson
- Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - Prisana Pripatnanont
- Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
| | - JIrut Meesane
- Institute of Biomedical Engineering, Faculty of Medicine, Prince of Songkla University, Songkhla, Thailand
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16
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Stapelfeldt K, Stamboroski S, Mednikova P, Brüggemann D. Fabrication of 3D-nanofibrous fibrinogen scaffolds using salt-induced self assembly. Biofabrication 2019; 11:025010. [DOI: 10.1088/1758-5090/ab0681] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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17
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Mirzaei-Parsa MJ, Ghanbari H, Bahrami N, Hadadi-Abianeh S, Faridi-Majidi R. The effects of cross-linked/uncross-linked electrospun fibrinogen/polycaprolactone nanofibers on the proliferation of normal human epidermal keratinocytes. JOURNAL OF POLYMER ENGINEERING 2018. [DOI: 10.1515/polyeng-2017-0350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The aim of this study was an investigation on the proliferation rate of normal human epidermal keratinocytes (NHEK) on the cross-linked and uncross-linked fibrinogen/polycaprolactone (Fbg/PCL) nanofibers to determine a suitable scaffold for skin tissue engineering. Nanofibrous scaffolds were prepared by electrospinning of different weight ratios of Fbg to PCL and were analyzed as morphology, surface chemical properties and cytocompatibility by scanning electron microscopy (SEM), attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy and the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, respectively. The diameters of the blended uncross-linked scaffolds were in the range of 124±43 nm–209±155 nm. Cross-linking of scaffolds with glutaraldehyde did not make a significant change in the diameter of blended scaffolds in 16 h. Cross-linking also improved the tensile strength and weight loss rate of scaffolds. However, cross-linking demonstrated an unfavorable effect on the attachment and proliferation of NHEK cells. The proliferation study revealed that uncross-linked scaffolds containing 50% and 70% Fbg provide a better environment for the growth of NHEK cells, and can be considered promising scaffolds in tissue engineering applications.
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Affiliation(s)
- Mohamad Javad Mirzaei-Parsa
- Department of Medical Nanotechnology , School of Advanced Medical Technologies, Tehran University of Medical Sciences , Tehran 1417755469 , Iran
| | - Hossein Ghanbari
- Department of Medical Nanotechnology , School of Advanced Medical Technologies, Tehran University of Medical Sciences , Tehran 1417755469 , Iran
| | - Naghmeh Bahrami
- Craniomaxillofacial Research Center , Tehran University of Medical Sciences , Tehran , Iran
- Oral and Maxillofacial Surgery Department , School of Dentistry, Tehran University of Medical Sciences , Tehran , Iran
| | - Shahryar Hadadi-Abianeh
- Department of Plastic Surgery , Razi Hospital, Tehran University of Medical Sciences , Tehran , Iran
| | - Reza Faridi-Majidi
- Department of Medical Nanotechnology , School of Advanced Medical Technologies, Tehran University of Medical Sciences , Tehran 1417755469 , Iran
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18
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Mirzaei-Parsa MJ, Ghanizadeh A, Ebadi MT, Faridi-Majidi R. An alternative solvent for electrospinning of fibrinogen nanofibers. Biomed Mater Eng 2018; 29:279-287. [DOI: 10.3233/bme-181736] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Mohamad Javad Mirzaei-Parsa
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Amin Ghanizadeh
- Department of Blood Bank, Imam Khomeini Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Malihe T.K. Ebadi
- Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Reza Faridi-Majidi
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
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19
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Ghorbani S, Eyni H, Tiraihi T, Salari Asl L, Soleimani M, Atashi A, Pour Beiranvand S, Ebrahimi Warkiani M. Combined effects of 3D bone marrow stem cell-seeded wet-electrospun poly lactic acid scaffolds on full-thickness skin wound healing. INT J POLYM MATER PO 2018. [DOI: 10.1080/00914037.2017.1393681] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sadegh Ghorbani
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Hossein Eyni
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Taki Tiraihi
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Leila Salari Asl
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Soleimani
- Department of Hematology, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Amir Atashi
- Stem Cell and Tissue Engineering Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Shahram Pour Beiranvand
- Department of Anatomical Sciences, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Majid Ebrahimi Warkiani
- School of Mechanical and Manufacturing Engineering, Australian Centre for Nanomedicine, University of New South Wales, Sydney, Australia, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW, Australia
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20
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Electrospun and Electrosprayed Scaffolds for Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:79-100. [PMID: 30357619 DOI: 10.1007/978-981-13-0950-2_5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Electrospinning and electrospraying technologies provide an accessible and universal synthesis method for the continuous preparation of nanostructured materials. This chapter introduces recent uses of electrospun and electrosprayed scaffolds for tissue regeneration applications. More recent in vitro and in vivo of electrospun fibers are also discussed in relation to soft and hard tissue engineering applications. The focus is made on the bone, vascular, skin, neural and soft tissue regeneration. An introduction is presented regarding the production of biomaterials made by synthetic and natural polymers and inorganic and metallic materials for use in the production of scaffolds for regenerative medicine. For this proposal, the following techniques are discussed: electrospraying, co-axial and emulsion electrospinning and bio-electrospraying. Tissue engineering is an exciting and rapidly developing field for the understanding of how to regenerate the human body.
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21
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Hou L, Zhang X, Mikael PE, Lin L, Dong W, Zheng Y, Simmons TJ, Zhang F, Linhardt RJ. Biodegradable and Bioactive PCL-PGS Core-Shell Fibers for Tissue Engineering. ACS OMEGA 2017; 2:6321-6328. [PMID: 30023516 PMCID: PMC6044571 DOI: 10.1021/acsomega.7b00460] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 07/19/2017] [Indexed: 05/23/2023]
Abstract
Poly(glycerol sebacate) (PGS) has increasingly become a desirable biomaterial due to its elastic mechanical properties, biodegradability, and biocompatibility. Here, we report microfibrous core-shell mats of polycaprolactone (PCL)-PGS prepared using wet-wet coaxial electrospinning. The anticoagulant heparin was immobilized onto the surface of these electrospun fiber mats, and they were evaluated for their chemical, mechanical, and biological properties. The core-shell structure of PCL-PGS provided tunable degradation and mechanical properties. The slowly degrading PCL provided structural integrity, and the fast degrading PGS component increased fiber elasticity. Young's modulus of PCL-PGS ranged from 5.6 to 15.7 MPa. The ultimate tensile stress ranged from 2.0 to 2.9 MPa, and these fibers showed elongation from 290 to 900%. The addition of PGS and grafting of heparin improved the attachment and proliferation of human umbilical vein endothelial cells. Core-shell PCL-PGS fibers demonstrate improved performance as three-dimensional fibrous mats for potential tissue-engineering applications.
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Affiliation(s)
- Lijuan Hou
- Center
for Nanoscience and Nanotechnology, Zhejiang
Sci-Tech University, 5 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, P. R.
China
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Xing Zhang
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Paiyz E. Mikael
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Lei Lin
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Wenjun Dong
- Center
for Nanoscience and Nanotechnology, Zhejiang
Sci-Tech University, 5 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, P. R.
China
- School
of Materials Science and Engineering, University
of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, P. R. China
| | - Yingying Zheng
- Center
for Nanoscience and Nanotechnology, Zhejiang
Sci-Tech University, 5 Second Avenue, Xiasha Higher Education Zone, Hangzhou 310018, P. R.
China
| | - Trevor John Simmons
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Fuming Zhang
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
| | - Robert J. Linhardt
- Center for Biotechnology and Interdisciplinary
Studies and The Center for
Future Energy Systems, Rensselaer Polytechnic
Institute, 110 Eighth Street, Troy, New York 12180, United
States
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22
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Nonuniform Internal Structure of Fibrin Fibers: Protein Density and Bond Density Strongly Decrease with Increasing Diameter. BIOMED RESEARCH INTERNATIONAL 2017; 2017:6385628. [PMID: 29130043 PMCID: PMC5654258 DOI: 10.1155/2017/6385628] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/05/2017] [Accepted: 08/22/2017] [Indexed: 11/18/2022]
Abstract
The major structural component of a blood clot is a meshwork of fibrin fibers. It has long been thought that the internal structure of fibrin fibers is homogeneous; that is, the protein density and the bond density between protofibrils are uniform and do not depend on fiber diameter. We performed experiments to investigate the internal structure of fibrin fibers. We formed fibrin fibers with fluorescently labeled fibrinogen and determined the light intensity of a fiber, I, as a function of fiber diameter, D. The intensity and, thus, the total number of fibrin molecules in a cross-section scaled as D1.4. This means that the protein density (fibrin per cross-sectional area), ρp , is not homogeneous but instead strongly decreases with fiber diameter as D-0.6. Thinner fibers are denser than thicker fibers. We also determined Young's modulus, Y, as a function of fiber diameter. Y decreased strongly with increasing D; Y scaled as D-1.5. This implies that the bond density, ρb , also scales as D-1.5. Thinner fibers are stiffer than thicker fibers. Our data suggest that fibrin fibers have a dense, well-connected core and a sparse, loosely connected periphery. In contrast, electrospun fibrinogen fibers, used as a control, have a homogeneous cross-section.
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23
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Li W, Lucioni T, Li R, Bonin K, Cho SS, Guthold M. Stretching single fibrin fibers hampers their lysis. Acta Biomater 2017; 60:264-274. [PMID: 28754649 DOI: 10.1016/j.actbio.2017.07.037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2015] [Revised: 07/23/2017] [Accepted: 07/24/2017] [Indexed: 10/19/2022]
Abstract
Blood clots, whose main structural component is a mesh of microscopic fibrin fibers, experience mechanical strain from blood flow, clot retraction and interactions with platelets and other cells. We developed a transparent, striated and highly stretchable substrate made from fugitive glue (a styrenic block copolymer) to investigate how mechanical strain affects lysis of single, suspended fibrin fibers. In this suspended fiber assay, lysis manifested itself by fiber elongation, thickening (disassembly), fraying and collapse. Stretching single fibrin fibers significantly hampered their lysis. This effect was seen in uncrosslinked and crosslinked fibers. Crosslinking (without stretching) also hampered single fiber lysis. Our data suggest that strain is a novel mechanosensitive factor that regulates blood clot dissolution (fibrinolysis) at the single fiber level. At the molecular level of single fibrin molecules, strain may distort, or hinder access to, plasmin cleavage sites and thereby hamper lysis. STATEMENT OF SIGNIFICANCE Fibrin fibers are the major structural component of a blood clot. We developed a highly stretchable substrate made from fugitive glue and a suspended fibrin fiber lysis assay to investigate the effect of stretching on single fibrin fibers lysis. The key findings from our experiments are: 1) Fibers thicken and elongate upon lysis; 2) stretching strongly reduces lysis; 3) this effect is more pronounced for uncrosslinked fibers; and 4) stretching fibers has a similar effect on reducing lysis as crosslinking fibers. At the molecular level, strain may distort plasmin cleavage sites, or restrict access to those sites. Our results suggest that strain may be a novel mechanobiological factor that regulates fibrinolysis.
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24
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Li Y, Wan W. Exploring Polymer Nanofiber Mechanics: A review of the methods for determining their properties. IEEE NANOTECHNOLOGY MAGAZINE 2017. [DOI: 10.1109/mnano.2017.2708819] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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25
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Iturri J, Toca-Herrera JL. Characterization of Cell Scaffolds by Atomic Force Microscopy. Polymers (Basel) 2017; 9:E383. [PMID: 30971057 PMCID: PMC6418519 DOI: 10.3390/polym9080383] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 08/13/2017] [Accepted: 08/16/2017] [Indexed: 12/12/2022] Open
Abstract
This review reports on the use of the atomic force microscopy (AFM) in the investigation of cell scaffolds in recent years. It is shown how the technique is able to deliver information about the scaffold surface properties (e.g., topography), as well as about its mechanical behavior (Young's modulus, viscosity, and adhesion). In addition, this short review also points out the utilization of the atomic force microscope technique beyond its usual employment in order to investigate another type of basic questions related to materials physics, chemistry, and biology. The final section discusses in detail the novel uses that those alternative measuring modes can bring to this field in the future.
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Affiliation(s)
- Jagoba Iturri
- Institute for Biophysics, Department of NanoBiotechnology, University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Wien, Austria.
| | - José L Toca-Herrera
- Institute for Biophysics, Department of NanoBiotechnology, University of Natural Resources and Life Sciences, Muthgasse 11, 1190 Wien, Austria.
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26
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Study the molecular structure of poly(ε-caprolactone)/graphene oxide and graphene nanocomposite nanofibers. J Mech Behav Biomed Mater 2016; 61:484-492. [DOI: 10.1016/j.jmbbm.2016.04.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 11/20/2022]
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27
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Aqil A, Tchemtchoua VT, Colige A, Atanasova G, Poumay Y, Jérôme C. Preparation and characterizations of EGDE crosslinked chitosan electrospun membranes. Clin Hemorheol Microcirc 2016; 60:39-50. [PMID: 25818149 DOI: 10.3233/ch-151930] [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] [Indexed: 12/18/2022]
Abstract
Composite Crosslinked nanofibrous membranes of chitosan, ethylene glycol diglycidyl ether (EGDE) and polyethylene oxide was successfully prepared with bead free morphology via electrospinning technique followed by heat mediated chemical crosslinking. Architectural stability of nanofiber mat in aqueous medium was achieved by chemical crosslinking of only 1% EGDE, and tensile strength tests revealed that increasing EGDE content has considerably enhance the elastic modulus of nanofibers. The structure, morphology and mechanical properties of nanofibers were characterized by Attenuated Total Reflection-Fourier Transform Infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM) and Instron machine, respectively. Skin fibroblasts and endothelial cells showed good attachment, proliferation and viability on crosslinked electrospun membranes. The results indicate a good biocompatibility and non-toxic nature of the resulted membrane.
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Affiliation(s)
- A Aqil
- Center for Macromolecules Study and Research, Institut de Chimie, University of Liège, Liège, Belgium
| | - V T Tchemtchoua
- Laboratory of Connective Tissues Biology, GIGA Research Center, University of Liège, Sart Tilman, Belgium
| | - A Colige
- Laboratory of Connective Tissues Biology, GIGA Research Center, University of Liège, Sart Tilman, Belgium
| | - G Atanasova
- Laboratory of Cells and Tissues, University of Namur (FUNDP), Namur, Belgium
| | - Y Poumay
- Laboratory of Cells and Tissues, University of Namur (FUNDP), Namur, Belgium
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28
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Gugutkov D, Gustavsson J, Cantini M, Salmeron-Sánchez M, Altankov G. Electrospun fibrinogen-PLA nanofibres for vascular tissue engineering. J Tissue Eng Regen Med 2016; 11:2774-2784. [DOI: 10.1002/term.2172] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 01/22/2016] [Accepted: 02/15/2016] [Indexed: 01/04/2023]
Affiliation(s)
- D. Gugutkov
- Institute for Bioengineering of Catalonia (IBEC); Barcelona Spain
| | - J. Gustavsson
- Institute for Bioengineering of Catalonia (IBEC); Barcelona Spain
| | - M. Cantini
- Division of Biomedical Engineering; School of Engineering, University of Glasgow; UK
| | - M. Salmeron-Sánchez
- Division of Biomedical Engineering; School of Engineering, University of Glasgow; UK
| | - G. Altankov
- Institute for Bioengineering of Catalonia (IBEC); Barcelona Spain
- Centro de Investigación Biomédica en Red en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN); Zaragoza Spain
- Institucio Catalana de Recerca i Estudis Avançats (ICREA); Barcelona Spain
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29
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Baker SR, Banerjee S, Bonin K, Guthold M. Determining the mechanical properties of electrospun poly-ε-caprolactone (PCL) nanofibers using AFM and a novel fiber anchoring technique. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 59:203-212. [DOI: 10.1016/j.msec.2015.09.102] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 09/07/2015] [Accepted: 09/28/2015] [Indexed: 10/22/2022]
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30
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Mele E. Electrospinning of natural polymers for advanced wound care: towards responsive and adaptive dressings. J Mater Chem B 2016; 4:4801-4812. [DOI: 10.1039/c6tb00804f] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Nanofibrous dressings produced by electrospinning proteins and polysaccharides are highly promising candidates in promoting wound healing and skin regeneration.
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Affiliation(s)
- E. Mele
- Department of Materials
- Loughborough University
- Loughborough
- UK
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31
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Guarino V, Cirillo V, Ambrosio L. Bicomponent electrospun scaffolds to design extracellular matrix tissue analogs. Expert Rev Med Devices 2015; 13:83-102. [PMID: 26619260 DOI: 10.1586/17434440.2016.1126505] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In the last decade, bicomponent fibers have been proposed to fabricate bio-inspired systems for tissue repair, regenerative medicine, medical healthcare and clinical applications. In comparison with monocomponent fibers, key advantage concerns their ability of self-adapting to the physiological conditions through an extended pattern of signals--morphological, chemical and physical ones--confined at the single fiber level. Hydrophobic/hydrophilic phases may be variously organized by tuneable processing modes (i.e., blending, core/shell, interweaving) thus offering different benefits in terms of biological activity, fluid sorption and molecular transport properties (first generation). The possibility to efficiently graft cell-adhesive proteins and peptide sequences onto the fiber surface mediated by spacers or impregnating hydrogels allows to trigger cell late activities by a controlled and sustained release in vitro of specific biomolecules (i.e., morphogens, growth factors). Here, we introduce an overview of current approaches based on bicomponent fiber use as extra cellular matrix analogs with cell-instructive functions and hierarchal organization of living tissues.
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Affiliation(s)
- Vincenzo Guarino
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
| | - Valentina Cirillo
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
| | - Luigi Ambrosio
- a Institute for Polymers, Composites and Biomaterials, Department of Chemical Sciences & Materials Technology , National Research Council of Italy , 80125 Naples , Italy
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32
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Aligned poly(ε-caprolactone)/graphene oxide and reduced graphene oxide nanocomposite nanofibers: Morphological, mechanical and structural properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 56:325-34. [DOI: 10.1016/j.msec.2015.06.045] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 03/28/2015] [Accepted: 06/22/2015] [Indexed: 11/22/2022]
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Mohammadzadehmoghadam S, Dong Y, Jeffery Davies I. Recent progress in electrospun nanofibers: Reinforcement effect and mechanical performance. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/polb.23762] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Yu Dong
- Department of Mechanical Engineering; Curtin University; GPO Box U1987 Perth Western Australia 6845 Australia
| | - Ian Jeffery Davies
- Department of Mechanical Engineering; Curtin University; GPO Box U1987 Perth Western Australia 6845 Australia
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Li W, Lucioni T, Guo X, Smelser A, Guthold M. Highly Stretchable, Biocompatible, Striated Substrate Made from Fugitive Glue. MATERIALS 2015. [PMCID: PMC5455748 DOI: 10.3390/ma8063508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
We developed a novel substrate made from fugitive glue (styrenic block copolymer) that can be used to analyze the effects of large strains on biological samples. The substrate has the following attributes: (1) It is easy to make from inexpensive components; (2) It is transparent and can be used in optical microscopy; (3) It is extremely stretchable as it can be stretched up to 700% strain; (4) It can be micro-molded, for example we created micro-ridges that are 6 μm high and 13 μm wide; (5) It is adhesive to biological fibers (we tested fibrin fibers), and can be used to uniformly stretch those fibers; (6) It is non-toxic to cells (we tested human mammary epithelial cells); (7) It can tolerate various salt concentrations up to 5 M NaCl and low (pH 0) and high (pH 14) pH values. Stretching of this extraordinary stretchable substrate is relatively uniform and thus, can be used to test multiple cells or fibers in parallel under the same conditions.
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Affiliation(s)
- Wei Li
- Department of Physics, Wake Forest University, 7507 Reynolda Station, Winston-Salem, NC 27109, USA; E-Mails: (W.L.); (T.L.); (X.G.)
| | - Tomas Lucioni
- Department of Physics, Wake Forest University, 7507 Reynolda Station, Winston-Salem, NC 27109, USA; E-Mails: (W.L.); (T.L.); (X.G.)
| | - Xinyi Guo
- Department of Physics, Wake Forest University, 7507 Reynolda Station, Winston-Salem, NC 27109, USA; E-Mails: (W.L.); (T.L.); (X.G.)
| | - Amanda Smelser
- Department of Biochemistry and Molecular Biology, School of Medicine Wake Forest University, Winston-Salem, NC 27157, USA; E-Mail:
| | - Martin Guthold
- Department of Physics, Wake Forest University, 7507 Reynolda Station, Winston-Salem, NC 27109, USA; E-Mails: (W.L.); (T.L.); (X.G.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-336-758-4977; Fax: +1-336-758-6142
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Brown AC, Baker SR, Douglas AM, Keating M, Alvarez-Elizondo MB, Botvinick EL, Guthold M, Barker TH. Molecular interference of fibrin's divalent polymerization mechanism enables modulation of multiscale material properties. Biomaterials 2015; 49:27-36. [PMID: 25725552 DOI: 10.1016/j.biomaterials.2015.01.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 01/19/2015] [Accepted: 01/20/2015] [Indexed: 10/24/2022]
Abstract
Protein based polymers provide an exciting and complex landscape for tunable natural biomaterials through modulation of molecular level interactions. Here we demonstrate the ability to modify protein polymer structural and mechanical properties at multiple length scales by molecular 'interference' of fibrin's native polymerization mechanism. We have previously reported that engagement of fibrin's polymerization 'hole b', also known as 'b-pockets', through PEGylated complementary 'knob B' mimics can increase fibrin network porosity but also, somewhat paradoxically, increase network stiffness. Here, we explore the possible mechanistic underpinning of this phenomenon through characterization of the effects of knob B-fibrin interaction at multiple length scales from molecular to bulk polymer. Despite its weak monovalent binding affinity for fibrin, addition of both knob B and PEGylated knob B at concentrations near the binding coefficient, Kd, increased fibrin network porosity, consistent with the reported role of knob B-hole b interactions in promoting lateral growth of fibrin fibers. Addition of PEGylated knob B decreases the extensibility of single fibrin fibers at concentrations near its Kd but increases extensibility of fibers at concentrations above its Kd. The data suggest this bimodal behavior is due to the individual contributions knob B, which decreases fiber extensibility, and PEG, which increase fiber extensibility. Taken together with laser trap-based microrheological and bulk rheological analyses of fibrin polymers, our data strongly suggests that hole b engagement increases in single fiber stiffness that translates to higher storage moduli of fibrin polymers despite their increased porosity. These data point to possible strategies for tuning fibrin polymer mechanical properties through modulation of single fiber mechanics.
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Affiliation(s)
- Ashley C Brown
- The School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Stephen R Baker
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, United States
| | - Alison M Douglas
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, United States
| | - Mark Keating
- Beckman Laser Institute/Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, CA 92612, United States
| | - Martha B Alvarez-Elizondo
- Beckman Laser Institute/Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, CA 92612, United States
| | - Elliot L Botvinick
- Beckman Laser Institute/Edwards Lifesciences Center for Advanced Cardiovascular Technology, University of California Irvine, Irvine, CA 92612, United States
| | - Martin Guthold
- Department of Physics, Wake Forest University, Winston-Salem, NC 27109, United States
| | - Thomas H Barker
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30332, United States; The Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA 30332, United States.
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Chlanda A, Rebis J, Kijeńska E, Wozniak MJ, Rozniatowski K, Swieszkowski W, Kurzydlowski KJ. Quantitative imaging of electrospun fibers by PeakForce Quantitative NanoMechanics atomic force microscopy using etched scanning probes. Micron 2015; 72:1-7. [PMID: 25710786 DOI: 10.1016/j.micron.2015.01.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/31/2015] [Accepted: 01/31/2015] [Indexed: 11/17/2022]
Abstract
Electrospun polymeric submicron and nanofibers can be used as tissue engineering scaffolds in regenerative medicine. In physiological conditions fibers are subjected to stresses and strains from the surrounding biological environment. Such stresses can cause permanent deformation or even failure to their structure. Therefore, there is a growing necessity to characterize their mechanical properties, especially at the nanoscale. Atomic force microscopy is a powerful tool for the visualization and probing of selected mechanical properties of materials in biomedical sciences. Image resolution of atomic force microscopy techniques depends on the equipment quality and shape of the scanning probe. The probe radius and aspect ratio has huge impact on the quality of measurement. In the presented work the nanomechanical properties of four different polymer based electrospun fibers were tested using PeakForce Quantitative NanoMechanics atomic force microscopy, with standard and modified scanning probes. Standard, commercially available probes have been modified by etching using focused ion beam (FIB). Results have shown that modified probes can be used for mechanical properties mapping of biomaterial in the nanoscale, and generate nanomechanical information where conventional tips fail.
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Affiliation(s)
- Adrian Chlanda
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland.
| | - Janusz Rebis
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland
| | - Ewa Kijeńska
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland
| | - Michal J Wozniak
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland; Warsaw University of Technology, University Research Centre - Functional Materials, 141 Woloska str., 02-507, Warsaw, Poland
| | - Krzysztof Rozniatowski
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland
| | - Wojciech Swieszkowski
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland
| | - Krzysztof J Kurzydlowski
- Warsaw University of Technology, Faculty of Material Science and Engineering, 141 Woloska str., 02-507, Warsaw, Poland
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Pereira IHL, Ayres E, Averous L, Schlatter G, Hebraud A, Mendes STOL, Oréfice RL. Elaboration and Characterization of Coaxial Electrospun Poly(ε-Caprolactone)/Gelatin Nanofibers for Biomedical Applications. ADVANCES IN POLYMER TECHNOLOGY 2014. [DOI: 10.1002/adv.21475] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ildeu H. L. Pereira
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG); Pampulha Belo Horizonte MG Brazil
| | - Eliane Ayres
- Department of Materials, Technologies and Processes, School of Design; Minas Gerais State University (UEMG); Belo Horizonte MG Brazil
| | - Luc Averous
- ICPEES-ECPM; UMR 7515, Université de Strasbourg; 67087 Strasbourg Cedex 2 France
| | - Guy Schlatter
- ICPEES-ECPM; UMR 7515, Université de Strasbourg; 67087 Strasbourg Cedex 2 France
| | - Anne Hebraud
- ICPEES-ECPM; UMR 7515, Université de Strasbourg; 67087 Strasbourg Cedex 2 France
| | | | - Rodrigo L. Oréfice
- Department of Metallurgical and Materials Engineering, Federal University of Minas Gerais (UFMG); Pampulha Belo Horizonte MG Brazil
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Sayin E, Baran ET, Hasirci V. Protein-based materials in load-bearing tissue-engineering applications. Regen Med 2014; 9:687-701. [DOI: 10.2217/rme.14.52] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Proteins such as collagen and elastin are robust molecules that constitute nanocomponents in the hierarchically organized ultrastructures of bone and tendon as well as in some of the soft tissues that have load-bearing functions. In the present paper, the macromolecular structure and function of the proteins are reviewed and the potential of mammalian and non-mammalian proteins in the engineering of load-bearing tissue substitutes are discussed. Chimeric proteins have become an important structural biomaterial source and their potential in tissue engineering is highlighted. Processing of proteins challenge investigators and in this review rapid prototyping and microfabrication are proposed as methods for obtaining precisely defined custom-built tissue engineered structures with intrinsic microarchitecture.
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Affiliation(s)
- Esen Sayin
- METU, Department of Biotechnology, Ankara, Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering, Ankara 06800, Turkey
| | - Erkan Türker Baran
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering, Ankara 06800, Turkey
| | - Vasif Hasirci
- METU, Department of Biotechnology, Ankara, Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering, Ankara 06800, Turkey
- METU, Departments of Biological Sciences, Ankara, Turkey
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Machado R, da Costa A, Sencadas V, Garcia-Arévalo C, Costa CM, Padrão J, Gomes A, Lanceros-Méndez S, Rodríguez-Cabello JC, Casal M. Electrospun silk-elastin-like fibre mats for tissue engineering applications. Biomed Mater 2013; 8:065009. [DOI: 10.1088/1748-6041/8/6/065009] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fee TJ, Dean DR, Eberhardt AW, Berry JL. A novel device to quantify the mechanical properties of electrospun nanofibers. J Biomech Eng 2013; 134:104503. [PMID: 23083203 DOI: 10.1115/1.4007635] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mechanical deformation of cell-seeded electrospun matrices plays an important role in cell signaling. However, electrospun biomaterials have inherently complex geometries due to the random deposition of fibers during the electrospinning process. This confounds attempts at quantifying strains exerted on adherent cells during electrospun matrix deformation. We have developed a novel mechanical test platform that allows deposition and tensile testing of electrospun fibers in a highly parallel arrangement to simplify mechanical analysis of the fibers alone and with adherent cells. The device is capable of optically recording fiber strain in a cell culture environment. Here we report on the mechanical and viscoelastic properties of highly parallel electrospun poly(ε-caprolactone) fibers. Force-strain data derived from this device will drive the development of cellular mechanotransduction studies as well as the customization of electrospun matrices for specific engineered tissue applications.
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Affiliation(s)
- Timothy J Fee
- Department of Biomedical Engineering, University of Alabama at Birmingham, Birmingham, AL 35294, USA.
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Sarkar SD, Farrugia BL, Dargaville TR, Dhara S. Physico-chemical/biological properties of tripolyphosphate cross-linked chitosan based nanofibers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:1446-54. [DOI: 10.1016/j.msec.2012.12.066] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2012] [Revised: 11/05/2012] [Accepted: 12/14/2012] [Indexed: 11/24/2022]
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Gugutkov D, Gustavsson J, Ginebra MP, Altankov G. Fibrinogen nanofibers for guiding endothelial cell behavior. Biomater Sci 2013; 1:1065-1073. [DOI: 10.1039/c3bm60124b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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