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Effect of Hydroxyapatite Coating by Er: YAG Pulsed Laser Deposition on the Bone Formation Efficacy by Polycaprolactone Porous Scaffold. Int J Mol Sci 2022; 23:ijms23169048. [PMID: 36012313 PMCID: PMC9409384 DOI: 10.3390/ijms23169048] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/01/2022] [Accepted: 08/10/2022] [Indexed: 11/17/2022] Open
Abstract
Composite scaffolds obtained by the combination of biodegradable porous scaffolds and hydroxyapatite with bone regeneration potential are feasible materials for bone tissue engineering. However, most composite scaffolds have been fabricated by complicated procedures or under thermally harsh conditions. We have previously demonstrated that hydroxyapatite coating onto various substrates under a thermally mild condition was achieved by erbium-doped yttrium aluminum garnet (Er: YAG) pulsed laser deposition (PLD). The purpose of this study was to prepare a polycaprolactone (PCL) porous scaffold coated with the hydroxyapatite by the Er: YAG-PLD method. Hydroxyapatite coating by the Er: YAG-PLD method was confirmed by morphology, crystallographic analysis, and surface chemical characterization studies. When cultured on PCL porous scaffold coated with hydroxyapatite, rat bone marrow-derived mesenchymal stem cells adhered, spread, and proliferated well. The micro-CT and staining analyses after the implantation of scaffold into the critical-sized calvaria bone defect in rats indicate that PCL porous scaffold coated with hydroxyapatite demonstrates accelerated and widespread bone formation. In conclusion, PCL porous scaffold coated with hydroxyapatite obtained by the Er: YAG-PLD method is a promising material in bone tissue engineering.
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Mahmud Z, Nasrin A, Hassan M, Gomes VG. 3D‐printed polymer
nanocomposites with carbon quantum dots for enhanced properties and in situ monitoring of cardiovascular stents. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zaheri Mahmud
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney New South Wales Australia
| | - Aklima Nasrin
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney New South Wales Australia
| | - Mahbub Hassan
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney New South Wales Australia
| | - Vincent G. Gomes
- School of Chemical and Biomolecular Engineering The University of Sydney Sydney New South Wales Australia
- Nano Institute The University of Sydney Sydney New South Wales Australia
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El Khatib M, Russo V, Prencipe G, Mauro A, Wyrwa R, Grimm G, Di Mattia M, Berardinelli P, Schnabelrauch M, Barboni B. Amniotic Epithelial Stem Cells Counteract Acidic Degradation By-Products of Electrospun PLGA Scaffold by Improving Their Immunomodulatory Profile In Vitro. Cells 2021; 10:cells10113221. [PMID: 34831443 PMCID: PMC8623927 DOI: 10.3390/cells10113221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 12/25/2022] Open
Abstract
Electrospun poly(lactic-co-glycolic acid) (PLGA) scaffolds with highly aligned fibers (ha-PLGA) represent promising materials in the field of tendon tissue engineering (TE) due to their characteristics in mimicking fibrous extracellular matrix (ECM) of tendon native tissue. Among these properties, scaffold biodegradability must be controlled allowing its replacement by a neo-formed native tendon tissue in a controlled manner. In this study, ha-PLGA were subjected to hydrolytic degradation up to 20 weeks, under di-H2O and PBS conditions according to ISO 10993-13:2010. These were then characterized for their physical, morphological, and mechanical features. In vitro cytotoxicity tests were conducted on ovine amniotic epithelial stem cells (oAECs), up to 7 days, to assess the effect of non-buffered and buffered PLGA by-products at different concentrations on cell viability and their stimuli on oAECs’ immunomodulatory properties. The ha-PLGA scaffolds degraded slowly as evidenced by a slight decrease in mass loss (14%) and average molecular weight (35%), with estimated degradation half-time of about 40 weeks under di-H2O. The ultrastructure morphology of the scaffolds showed no significant fiber degradation even after 20 weeks, but alteration of fiber alignment was already evident at week 1. Moreover, mechanical properties decreased throughout the degradation times under wet as well as dry PBS conditions. The influence of acid degradation media on oAECs was dose-dependent, with a considerable effect at 7 days’ culture point. This effect was notably reduced by using buffered media. To a certain level, cells were able to compensate the generated inflammation-like microenvironment by upregulating IL-10 gene expression and favoring an anti-inflammatory rather than pro-inflammatory response. These in vitro results are essential to better understand the degradation behavior of ha-PLGA in vivo and the effect of their degradation by-products on affecting cell performance. Indeed, buffering the degradation milieu could represent a promising strategy to balance scaffold degradation. These findings give good hope with reference to the in vivo condition characterized by physiological buffering systems.
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Affiliation(s)
- Mohammad El Khatib
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
| | - Valentina Russo
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
| | - Giuseppe Prencipe
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
- Correspondence:
| | - Annunziata Mauro
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
| | - Ralf Wyrwa
- Department of Biomaterials, INNOVENT e.V., 07745 Jena, Germany; (R.W.); (G.G.); (M.S.)
| | - Gabriele Grimm
- Department of Biomaterials, INNOVENT e.V., 07745 Jena, Germany; (R.W.); (G.G.); (M.S.)
| | - Miriam Di Mattia
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
| | - Paolo Berardinelli
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
| | | | - Barbara Barboni
- Unit of Basic and Applied Biosciences, Faculty of Bioscience and Agro-Food and Environmental Technology, University of Teramo, 64100 Teramo, Italy; (M.E.K.); (V.R.); (A.M.); (M.D.M.); (P.B.); (B.B.)
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Chaiarwut S, Ekabutr P, Chuysinuan P, Chanamuangkon T, Supaphol P. Surface immobilization of PCL electrospun nanofibers with pexiganan for wound dressing. JOURNAL OF POLYMER RESEARCH 2021. [DOI: 10.1007/s10965-021-02669-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Li A, Pereira C, Hill EE, Vukcevich O, Wang A. In vitro, In vivo and Ex vivo Models for Peripheral Nerve Injury and Regeneration. Curr Neuropharmacol 2021; 20:344-361. [PMID: 33827409 PMCID: PMC9413794 DOI: 10.2174/1570159x19666210407155543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 01/29/2021] [Accepted: 03/29/2021] [Indexed: 11/22/2022] Open
Abstract
Peripheral Nerve Injuries (PNI) frequently occur secondary to traumatic injuries. Recovery from these injuries can be expectedly poor, especially in proximal injuries. In order to study and improve peripheral nerve regeneration, scientists rely on peripheral nerve models to identify and test therapeutic interventions. In this review, we discuss the best described and most commonly used peripheral nerve models that scientists have and continue to use to study peripheral nerve physiology and function.
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Affiliation(s)
- Andrew Li
- University of California Davis Ringgold standard institution - Hand and Upper Extremity Surgery, Division of Plastic Surgery, Department of Surgery Sacramento, California. United States
| | - Clifford Pereira
- University of California Davis Ringgold standard institution - Hand and Upper Extremity Surgery, Division of Plastic Surgery, Department of Surgery Sacramento, California. United States
| | - Elise Eleanor Hill
- University of California Davis Ringgold standard institution - Department of Surgery Sacramento, California. United States
| | - Olivia Vukcevich
- University of California Davis Ringgold standard institution - Surgery & Biomedical Engineering Sacramento, California. United States
| | - Aijun Wang
- University of California Davis - Surgery & Biomedical Engineering 4625 2nd Ave., Suite 3005 Sacramento Sacramento California 95817. United States
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Esmail A, Pereira JR, Zoio P, Silvestre S, Menda UD, Sevrin C, Grandfils C, Fortunato E, Reis MAM, Henriques C, Oliva A, Freitas F. Oxygen Plasma Treated-Electrospun Polyhydroxyalkanoate Scaffolds for Hydrophilicity Improvement and Cell Adhesion. Polymers (Basel) 2021; 13:polym13071056. [PMID: 33801747 PMCID: PMC8036702 DOI: 10.3390/polym13071056] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/22/2021] [Accepted: 03/24/2021] [Indexed: 12/12/2022] Open
Abstract
Poly(hydroxyalkanoates) (PHAs) with differing material properties, namely, the homopolymer poly(3-hydroxybutyrate), P(3HB), the copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate), P(3HB-co-3HV), with a 3HV content of 25 wt.% and a medium chain length PHA, and mcl-PHA, mainly composed of 3-hydroxydecanoate, were studied as scaffolding material for cell culture. P(3HB) and P(3HB-co-3HV) were individually spun into fibers, as well as blends of the mcl-PHA with each of the scl-PHAs. An overall biopolymer concentration of 4 wt.% was used to prepare the electrospinning solutions, using chloroform as the solvent. A stable electrospinning process and good quality fibers were obtained for a solution flow rate of 0.5 mL h−1, a needle tip collector distance of 20 cm and a voltage of 12 kV for P(3HB) and P(3HB-co-3HV) solutions, while for the mcl-PHA the distance was increased to 25 cm and the voltage to 15 kV. The scaffolds’ hydrophilicity was significantly increased under exposure to oxygen plasma as a surface treatment. Complete wetting was obtained for the oxygen plasma treated scaffolds and the water uptake degree increased in all treated scaffolds. The biopolymers crystallinity was not affected by the electrospinning process, while their treatment with oxygen plasma decreased their crystalline fraction. Human dermal fibroblasts were able to adhere and proliferate within the electrospun PHA-based scaffolds. The P(3HB-co-3HV): mcl-PHA oxygen plasma treated scaffold highlighted the most promising results with a cell adhesion rate of 40 ± 8%, compared to 14 ± 4% for the commercial oxygen plasma treated polystyrene scaffold AlvetexTM. Scaffolds based on P(3HB-co-3HV): mcl-PHA blends produced by electrospinning and submitted to oxygen plasma exposure are therefore promising biomaterials for the development of scaffolds for tissue engineering.
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Affiliation(s)
- Asiyah Esmail
- UCIBIO-REQUIMTE, Chemistry Department, Nova School of Sciences and Technology, 2829-516 Caparica, Portugal; (A.E.); (J.R.P.); (M.A.M.R.)
- ITQB NOVA-Instituto de Tecnologia Química e Biológica António Xavier, Nova University Lisbon, 2780-157 Oeiras, Portugal; (P.Z.); (A.O.)
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal
| | - João R. Pereira
- UCIBIO-REQUIMTE, Chemistry Department, Nova School of Sciences and Technology, 2829-516 Caparica, Portugal; (A.E.); (J.R.P.); (M.A.M.R.)
| | - Patrícia Zoio
- ITQB NOVA-Instituto de Tecnologia Química e Biológica António Xavier, Nova University Lisbon, 2780-157 Oeiras, Portugal; (P.Z.); (A.O.)
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal
| | - Sara Silvestre
- CENIMAT/i3N, Materials Science Department, Nova School of Science and Technology, 2829-516 Caparica, Portugal; (S.S.); (U.D.M.); (E.F.)
| | - Ugur Deneb Menda
- CENIMAT/i3N, Materials Science Department, Nova School of Science and Technology, 2829-516 Caparica, Portugal; (S.S.); (U.D.M.); (E.F.)
| | - Chantal Sevrin
- CEIB-Interfaculty Research Centre of Biomaterials, University of Liège, B-4000 Liège, Belgium; (C.S.); (C.G.)
| | - Christian Grandfils
- CEIB-Interfaculty Research Centre of Biomaterials, University of Liège, B-4000 Liège, Belgium; (C.S.); (C.G.)
| | - Elvira Fortunato
- CENIMAT/i3N, Materials Science Department, Nova School of Science and Technology, 2829-516 Caparica, Portugal; (S.S.); (U.D.M.); (E.F.)
| | - Maria A. M. Reis
- UCIBIO-REQUIMTE, Chemistry Department, Nova School of Sciences and Technology, 2829-516 Caparica, Portugal; (A.E.); (J.R.P.); (M.A.M.R.)
| | - Célia Henriques
- CENIMAT/i3N, Physics Department, Nova School of Sciences and Technology, 2829-516 Caparica, Portugal;
| | - Abel Oliva
- ITQB NOVA-Instituto de Tecnologia Química e Biológica António Xavier, Nova University Lisbon, 2780-157 Oeiras, Portugal; (P.Z.); (A.O.)
- iBET, Instituto de Biologia Experimental e Tecnológica, 2780-157 Oeiras, Portugal
| | - Filomena Freitas
- UCIBIO-REQUIMTE, Chemistry Department, Nova School of Sciences and Technology, 2829-516 Caparica, Portugal; (A.E.); (J.R.P.); (M.A.M.R.)
- Correspondence: ; Tel.: +35-12-1294-8300
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Moharrami Kasmaie F, Zamani F, Sayad-Fathi S, Zaminy A. Promotion of nerve regeneration by biodegradable nanofibrous scaffold following sciatic nerve transection in rats. Prog Biomater 2021; 10:53-64. [PMID: 33683651 DOI: 10.1007/s40204-021-00151-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/26/2021] [Indexed: 10/22/2022] Open
Abstract
Peripheral nerve injuries (PNIs) are one of the common causes of morbidity and disability worldwide. Autograft is considered the gold standard treatment for PNIs. However, due to the complications associated with autografts, other sources are considered as alternatives. Recently, electrospun nanofibrous scaffolds have received wide attention in the field of tissue engineering. Exogenous tubular constructs with uniaxially aligned topographical cues to enhance the axonal re-growth are needed to bridge large nerve gaps between proximal and distal ends. Although several studies have used PLGA/PCL, but few studies have been conducted on developing a two-layer scaffold with aligned fibers properly orientated along the axis direction of the sciatic nerve to meet the physical properties required for suturing, transplantation, and nerve regeneration. In this study, we sought to design and develop PLGA-PCL-aligned nanofibers. Following the conventional examinations, we implanted the scaffolds into 7-mm sciatic nerve gaps in a rat model of nerve injury. Our in vivo evaluations did not show any adverse effects, and after eight weeks, an acceptable improvement was noted in the electrophysiological, functional, and histological analyses. Thus, it can be concluded that nanofiber scaffolds can be used as a reliable approach for repairing PNIs. However, further research is warranted.
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Affiliation(s)
| | | | - Sara Sayad-Fathi
- Medical Biotechnology Research Center, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Arash Zaminy
- Medical Biotechnology Research Center, School of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran.
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Lim KT, Patel DK, Dutta SD, Choung HW, Jin H, Bhattacharjee A, Chung JH. Human Teeth-Derived Bioceramics for Improved Bone Regeneration. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2396. [PMID: 33266215 PMCID: PMC7761315 DOI: 10.3390/nano10122396] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 11/23/2020] [Accepted: 11/23/2020] [Indexed: 01/07/2023]
Abstract
Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is one of the most promising candidates of the calcium phosphate family, suitable for bone tissue regeneration due to its structural similarities with human hard tissues. However, the requirements of high purity and the non-availability of adequate synthetic techniques limit the application of synthetic HAp in bone tissue engineering. Herein, we developed and evaluated the bone regeneration potential of human teeth-derived bioceramics in mice's defective skulls. The developed bioceramics were analyzed by X-ray diffraction (XRD), Fourier-transform infrared (FTIR) spectroscopy, and scanning electron microscopy (FE-SEM). The developed bioceramics exhibited the characteristic peaks of HAp in FTIR and XRD patterns. The inductively coupled plasma mass spectrometry (ICP-MS) technique was applied to determine the Ca/P molar ratio in the developed bioceramics, and it was 1.67. Cytotoxicity of the simulated body fluid (SBF)-soaked bioceramics was evaluated by WST-1 assay in the presence of human alveolar bone marrow stem cells (hABMSCs). No adverse effects were observed in the presence of the developed bioceramics, indicating their biocompatibility. The cells adequately adhered to the bioceramics-treated media. Enhanced bone regeneration occurred in the presence of the developed bioceramics in the defected skulls of mice, and this potential was profoundly affected by the size of the developed bioceramics. The bioceramics-treated mice groups exhibited greater vascularization compared to control. Therefore, the developed bioceramics have the potential to be used as biomaterials for bone regeneration application.
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Affiliation(s)
- Ki-Taek Lim
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea; (D.K.P.); (S.D.D.)
| | - Dinesh K. Patel
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea; (D.K.P.); (S.D.D.)
| | - Sayan Deb Dutta
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Korea; (D.K.P.); (S.D.D.)
| | - Han-Wool Choung
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul 151921, Korea;
| | - Hexiu Jin
- Department of Plastic and Traumatic Surgery, School of Stomatology, Beijing Stomatological Hospital, Capital Medical University, Beijing 100069, China;
| | - Arjak Bhattacharjee
- Department of Materials Science and Engineering, Indian Institute of Technology, Kanpur 208016, India;
| | - Jong Hoon Chung
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul 151921, Korea
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Krishnan S, Chinnadurai GS, Ravishankar K, Raghavachari D, Perumal P. Statistical augmentation of polyhydroxybutyrate production by Isoptericola variabilis: Characterization, moulding, in vitro cytocompatibility and biodegradability evaluation. Int J Biol Macromol 2020; 166:80-97. [PMID: 33096176 DOI: 10.1016/j.ijbiomac.2020.10.089] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 10/02/2020] [Accepted: 10/12/2020] [Indexed: 02/08/2023]
Abstract
This study aimed to explore the production of polyhydroxybutyrate (PHB), a polyhydroxyalkanoate (PHA), which has been widely considered as a potential substitute for the synthetic polymers. Among 53 actinomycete isolates, 11 of them were found to be PHB positive and the quantity of PHB from the positive isolates varied from 10.5 to 29.82 wt% on a dry cell weight basis. A strain designated as PPLAT 012, accumulated relatively higher PHB and has been identified as Isoptericola variabilis by 16S rRNA gene sequence analysis. An effort has also been made to optimize the PHB production by the hyper-producing strain using the conventional, one-factor-at-a-time, and statistical response surface methodologies and the maximum PHB production (46.18%) in DSMZ medium, amended with 12% glucose and 9% potassium nitrate with a pH of 7.0. Further, the characteristic properties such as processability, cytocompatibility and biodegradability of the extracted PHB was also demonstrated. The physical properties of the recovered PHB was further improved by blending with PLA and the resultant blends were characterized. The present investigation has demonstrated that the isolate, Isoptericola variabilis, could be utilized as a potential source for the production of PHB with desirable characteristics, suitable for biomedical applications.
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Affiliation(s)
- Sivakumar Krishnan
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai 600 025, India
| | - Gandhi Shree Chinnadurai
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai 600 025, India
| | - Kartik Ravishankar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | | | - Palani Perumal
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai 600 025, India.
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Shalchy F, Lovell C, Bhaskar A. Hierarchical porosity in additively manufactured bioengineering scaffolds: Fabrication & characterisation. J Mech Behav Biomed Mater 2020; 110:103968. [PMID: 32745973 DOI: 10.1016/j.jmbbm.2020.103968] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 06/24/2020] [Accepted: 06/30/2020] [Indexed: 10/23/2022]
Abstract
Biomedical scaffolds with a high degree of porosity are known to facilitate the growth of healthy functioning tissues. In this study, scaffolds with hierarchical porosity are manufactured and their mechanical and thermal properties are characterised. Multi-scale porosity is achieved in scaffolds fabricated by Fused Deposition Modelling (FDM) in a novel way. Random intrinsic porosity at micron length scale obtained from particulate leaching is combined with the structured extrinsic porosity at millimeter length scales afforded by controlling the spacing between the struts. Polylactic acid (PLA) is blended with Polyvinyl alcohol (PVA) and an inorganic sacrificial phase, sodium chloride (NaCl), to produce pores at length scales of up to two orders of magnitude smaller than the inter-filament voids within 3D printed lattices. The specific elastic modulus and specific strength are maximised by optimising the polymer blends. The porosity level and pore size distribution of the foamy filaments within lattices are quantified statistically. Compression tests are performed on the porous samples and the observed mechanical response is attributed to the microstructure and density. Simple cellular solid models that possess power law are used to explain the measured trends and the dependence is associated with various mechanisms of elastic deformation of the cell walls. The relationship between pore architecture, pore connectivity, the blend material composition, and mechanical response of produced foams is brought out. Foams obtained using the PLA:PVA:NaCl 42%-18%-40% material blends show relatively high specific elastic modulus, specific strength and strain at failure. A quadratic power law relating the Young's modulus with the relative density is experimentally obtained, which is consistent with theoretical models for open-cell foams. 3D printing with blends, followed by leaching, produces structures with cumulative intrinsic and extrinsic porosity as high as 80%, in addition to good mechanical integrity.
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Affiliation(s)
- Faezeh Shalchy
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK.
| | | | - Atul Bhaskar
- Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, UK
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Dikici S, Claeyssens F, MacNeil S. Pre-Seeding of Simple Electrospun Scaffolds with a Combination of Endothelial Cells and Fibroblasts Strongly Promotes Angiogenesis. Tissue Eng Regen Med 2020; 17:445-458. [PMID: 32447555 PMCID: PMC7392995 DOI: 10.1007/s13770-020-00263-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/14/2020] [Accepted: 04/08/2020] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Introduction of pro-angiogenic cells into tissue-engineered (TE) constructs (prevascularisation) is a promising approach to overcome delayed neovascularisation of such constructs post-implantation. Accordingly, in this study, we examined the contribution of human dermal microvascular endothelial cells (HDMECs) and human dermal fibroblasts (HDFs) alone and in combination on the formation of new blood vessels in ex-ovo chick chorioallantoic membrane (CAM) assay. METHODS Poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and polycaprolactone (PCL) were first examined in terms of their physical, mechanical, and biological performances. The effect of gelatin coating and co-culture conditions on enhancing endothelial cell viability and growth was then investigated. Finally, the angiogenic potential of HDMECs and HDFs were assessed macroscopically and histologically after seeding on simple electrospun PHBV scaffolds either in isolation or in indirect co-culture using an ex-ovo CAM assay. RESULTS The results demonstrated that PHBV was slightly more favourable than PCL for HDMECs in terms of cell metabolic activity. The gelatin coating of PHBV scaffolds and co-culture of HDMECs with HDFs both showed a positive impact on HDMECs viability and growth. Both cell types induced angiogenesis over 7 days in the CAM assay either in isolation or in co-culture. The introduction of HDMECs to the scaffolds resulted in the production of more blood vessels in the area of implantation than the introduction of HDFs, but the co-culture of HDMECs and HDFs gave the most significant angiogenic activity. CONCLUSION Our findings showed that the in vitro prevascularisation of TE constructs with HDMECs and HDFs alone or in co-culture promotes angiogenesis in implantable TE constructs.
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Affiliation(s)
- Serkan Dikici
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK
| | - Frederik Claeyssens
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK
| | - Sheila MacNeil
- Tissue Engineering Group, Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, North Campus Broad Lane, Sheffield, S3 7HQ, UK.
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Evangeline S, Sridharan T. Biosynthesis and statistical optimization of polyhydroxyalkanoate (PHA) produced by Bacillus cereus VIT-SSR1 and fabrication of biopolymer films for sustained drug release. Int J Biol Macromol 2019; 135:945-958. [DOI: 10.1016/j.ijbiomac.2019.05.163] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 05/06/2019] [Accepted: 05/21/2019] [Indexed: 01/08/2023]
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13
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Altun E, Aydogdu MO, Togay SO, Sengil AZ, Ekren N, Haskoylu ME, Oner ET, Altuncu NA, Ozturk G, Crabbe-Mann M, Ahmed J, Gunduz O, Edirisinghe M. Bioinspired scaffold induced regeneration of neural tissue. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Chen D, Su Z, Weng L, Cao L, Chen C, Zeng S, Zhang S, Wu T, Hu Q, Xiao J. Effect of inflammation on endothelial cells induced by poly-L-lactic acid degradation in vitro and in vivo. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:1909-1919. [PMID: 30173602 DOI: 10.1080/09205063.2018.1517858] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Dongping Chen
- Central Laboratory, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Zhaobing Su
- Department of Cardiology, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Linsheng Weng
- Department of Cardiology, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Longbin Cao
- Central Laboratory, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Can Chen
- Department of Pathology, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Sufen Zeng
- Central Laboratory, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Suzhen Zhang
- Central Laboratory, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
| | - Tim Wu
- Dongguan TT Medical, Inc, Dongguan, China
- Vaso Tech, Inc. Lowell, MA, USA
| | - Qiang Hu
- Dongguan TT Medical, Inc, Dongguan, China
| | - Jianmin Xiao
- Central Laboratory, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
- Department of Cardiology, The Dongguan Affiliated Hospital of Medical College of Jinan University, The Fifth People's Hospital of Dongguan, Dongguan, China
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15
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Biodegradable stents for coronary artery disease treatment: Recent advances and future perspectives. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 91:163-178. [DOI: 10.1016/j.msec.2018.04.100] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 04/11/2018] [Accepted: 04/28/2018] [Indexed: 12/24/2022]
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16
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Kundu S, Das A, Basu A, Ghosh D, Datta P, Mukherjee A. Carboxymethyl guar gum synthesis in homogeneous phase and macroporous 3D scaffolds design for tissue engineering. Carbohydr Polym 2018; 191:71-78. [DOI: 10.1016/j.carbpol.2018.03.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 03/05/2018] [Accepted: 03/06/2018] [Indexed: 11/30/2022]
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17
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Sangsanoh P, Ekapakul N, Israsena N, Suwantong O, Supaphol P. Enhancement of biocompatibility on aligned electrospun poly(3-hydroxybutyrate) scaffold immobilized with laminin towards murine neuroblastoma Neuro2a cell line and rat brain-derived neural stem cells (mNSCs). POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4313] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pakakrong Sangsanoh
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Natjaya Ekapakul
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Nipan Israsena
- Department of Pharmacology, Faculty of Medicine; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
| | - Orawan Suwantong
- Center of Chemical Innovation for Sustainability (CIS); Mae Fah Luang University; Tasud, Muang Chiang Rai 57100 Thailand
- School of Science; Mae Fah Luang University; Tasud, Muang Chiang Rai 57100 Thailand
| | - Pitt Supaphol
- Technological Center for Electrospun Fibers, The Petroleum and Petrochemical College; Chulalongkorn University; Phyathai Road, Pathumwan Bangkok 10330 Thailand
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18
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Veneral JG, de Oliveira D, Ferreira SR, Oliveira JV. Continuous enzymatic synthesis of polycaprolactone in packed bed reactor using pressurized fluids. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.09.037] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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19
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Romo-Uribe A, Meneses-Acosta A, Domínguez-Díaz M. Viability of HEK 293 cells on poly-β-hydroxybutyrate (PHB) biosynthesized from a mutant Azotobacter vinelandii strain. Cast film and electrospun scaffolds. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 81:236-246. [DOI: 10.1016/j.msec.2017.07.045] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 06/26/2017] [Accepted: 07/27/2017] [Indexed: 11/28/2022]
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20
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Effects of various monomers and micro-structure of polyhydroxyalkanoates on the behavior of endothelial progenitor cells and endothelial cells for vascular tissue engineering. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1341-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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21
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Tonazzini I, Moffa M, Pisignano D, Cecchini M. Neuregulin 1 functionalization of organic fibers for Schwann cell guidance. NANOTECHNOLOGY 2017; 28:155303. [PMID: 28303795 DOI: 10.1088/1361-6528/aa6316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The repair of peripheral nerve lesions is a clinical problem where the functional recovery is often far from being satisfactory, although peripheral nerves generally retain good potential for regeneration. Here, we develop a novel scaffold approach based on bioactive fibers of poly(ε-caprolactone) where nanotopographical guidance and neuregulin 1 (NRG1) cues are combined. We interface them with rat primary Schwann cells (SCs), the peripheral glial cells that drive initial regeneration of injured nerves, and found that the combination of NRG1 with parallel nano-fibrous topographies is effective in improving SC growth up to 72 h, alignment to fiber topography, and bipolar differentiation, opening original perspectives for nerve repair applications.
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Affiliation(s)
- Ilaria Tonazzini
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa I-56127, Italy. Fondazione Umberto Veronesi, Piazza Velasca 5, Milan I-20122, Italy
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22
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Sangsanoh P, Israsena N, Suwantong O, Supaphol P. Effect of the surface topography and chemistry of poly(3-hydroxybutyrate) substrates on cellular behavior of the murine neuroblastoma Neuro2a cell line. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-017-1947-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Ramot Y, Haim-Zada M, Domb AJ, Nyska A. Biocompatibility and safety of PLA and its copolymers. Adv Drug Deliv Rev 2016; 107:153-162. [PMID: 27058154 DOI: 10.1016/j.addr.2016.03.012] [Citation(s) in RCA: 289] [Impact Index Per Article: 36.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Revised: 03/24/2016] [Accepted: 03/26/2016] [Indexed: 12/20/2022]
Abstract
PLA and its copolymers are commonly used for a wide variety of applications. While they are considered to be biocompatible, side effects resulting from their implantation have been reported. The implantation of biomaterials always results in a foreign body reaction. Such a reaction has also been reported following PLA and its copolymers. This article reviews the process of inflammatory reaction that is to be expected following implantation of PLA, and it highlights specific cases in which the inflammatory reaction can result in safety concerns. The authors also review selected cases from different medical fields to demonstrate possible clinical side effects resulting from its use.
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Bolaina-Lorenzo E, Martínez-Ramos C, Monleón-Pradas M, Herrera-Kao W, Cauich-Rodríguez JV, Cervantes-Uc JM. Electrospun polycaprolactone/chitosan scaffolds for nerve tissue engineering: physicochemical characterization and Schwann cell biocompatibility. Biomed Mater 2016; 12:015008. [DOI: 10.1088/1748-605x/12/1/015008] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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25
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Zhijiang C, Yi X, Haizheng Y, Jia J, Liu Y. Poly(hydroxybutyrate)/cellulose acetate blend nanofiber scaffolds: Preparation, characterization and cytocompatibility. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:757-67. [DOI: 10.1016/j.msec.2015.09.048] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 08/11/2015] [Accepted: 09/10/2015] [Indexed: 10/23/2022]
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26
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KÖSE S, AERTS KAYA F, DENKBAŞ EB, KORKUSUZ P, ÇETİNKAYA FD. Evaluation of biocompatibility of random or aligned electrospun polyhydroxybutyrate scaffolds combined with human mesenchymal stem cells. Turk J Biol 2016. [DOI: 10.3906/biy-1508-18] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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27
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Ghanavati Z, Neisi N, Bayati V, Makvandi M. The influence of substrate topography and biomaterial substance on skin wound healing. Anat Cell Biol 2015; 48:251-7. [PMID: 26770875 PMCID: PMC4701698 DOI: 10.5115/acb.2015.48.4.251] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Revised: 05/25/2015] [Accepted: 11/27/2015] [Indexed: 11/27/2022] Open
Abstract
Tissue engineering is a new field of which the main purpose is to regenerate and repair the damaged tissues. Scaffolds serve as three dimensional matrices for neo-organogenesis and their substance can be biologic or synthetic. Natural polymers have good interactions with the cells and synthetic biomaterials are also highly useful in biomedical application because of their biocompatible properties. In addition to scaffold substance, surface properties of biomaterials have an important role in tissue engineering. In this study, we examined whether substrate substance is important for wound healing or its surface topography. Therefore, we fabricated two matrices, electrospun polycaprolactone (PCL) nanofibers and collagen/chitosan film, and implanted them to the same rat models. After 2 weeks, the sizes of healing wounds were measured and their cellular structures were evaluated by histochemistry and mmunohistochemistry. Histological staining showed a good level of cellularization and epidermis-dermis formation in PCL implant while no determinable epithelium was observed after 2 weeks in collagen-chitosan graft. Immunohistochemical study demonstrated the highly expressed pancytokeratin in PCL graft while its expression was weak in underdeveloped epidermis of collagen-chitosan implantation. In conclusion, this study suggested that PCL nanofibers with high surface area had a more ideal property than natural collagen-chitosan film, therefore the structure and topography of a matrix seemed to be more important in wound healing than its material substance.
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Affiliation(s)
- Zeinab Ghanavati
- Cellular and Molecular Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.; Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Niloofar Neisi
- Department of Medical Virology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Vahid Bayati
- Cellular and Molecular Research Center, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.; Department of Anatomical Sciences, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Manoochehr Makvandi
- Department of Medical Virology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Geuna S, Raimondo S, Fregnan F, Haastert-Talini K, Grothe C. In vitromodels for peripheral nerve regeneration. Eur J Neurosci 2015; 43:287-96. [DOI: 10.1111/ejn.13054] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Revised: 08/03/2015] [Accepted: 08/20/2015] [Indexed: 01/10/2023]
Affiliation(s)
- S. Geuna
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute; University of Turin; Ospedale San Luigi, Regione Gonzole 10 10043 Orbassano Turin Italy
| | - S. Raimondo
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute; University of Turin; Ospedale San Luigi, Regione Gonzole 10 10043 Orbassano Turin Italy
| | - F. Fregnan
- Department of Clinical and Biological Sciences, and Cavalieri Ottolenghi Neuroscience Institute; University of Turin; Ospedale San Luigi, Regione Gonzole 10 10043 Orbassano Turin Italy
| | - K. Haastert-Talini
- Institute of Neuroanatomy; Hannover Medical School and Center for Systems Neuroscience (ZSN); Hannover Germany
| | - C. Grothe
- Institute of Neuroanatomy; Hannover Medical School and Center for Systems Neuroscience (ZSN); Hannover Germany
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Hoveizi E, Ebrahimi-Barough S, Tavakol S, Nabiuni M. In vitrocomparative survey of cell adhesion and proliferation of human induced pluripotent stem cells on surfaces of polymeric electrospun nanofibrous and solution-cast film scaffolds. J Biomed Mater Res A 2015; 103:2952-8. [DOI: 10.1002/jbm.a.35420] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Revised: 02/02/2015] [Accepted: 02/04/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Elham Hoveizi
- Department of Biology; Faculty of Sciences; Shahid Chamran University of Ahvaz; Ahvaz Iran
| | - Somayeh Ebrahimi-Barough
- Department of Tissue Engineering and Applied Cell Sciences; Faculty of Advanced Technologies in Medicine; Tehran University of Medical Sciences; Tehran Iran
| | - Shima Tavakol
- Razi Drug Research Center, Iran University of Medical Sciences; Tehran Iran
- Advanced Medical Science and Technologies Association, Student's Scientific Research Center, Tehran University of Medical Sciences; Tehran Iran
| | - Mohammad Nabiuni
- Department of Cell and Molecular Biology; Biological Science Faculty; Kharazmi University (TMU); Tehran Iran
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30
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Li YF, Rubert M, Yu Y, Besenbacher F, Chen M. Delivery of dexamethasone from electrospun PCL–PEO binary fibers and their effects on inflammation regulation. RSC Adv 2015. [DOI: 10.1039/c5ra03099d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Differences in surface topography, chemical composition, wettability and release kinetics of the anti-inflammatory drug dexamethasone among different PCL–PEO fibers collectively affected the regulation of inflammatory related gene expression.
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Affiliation(s)
- Yan-Fang Li
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- DK-8000 Aarhus C
- Denmark
- Institute of Nanoscience and Nanotechnology
| | - Marina Rubert
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Ying Yu
- Institute of Nanoscience and Nanotechnology
- Central China Normal University
- Wuhan 430079
- China
| | - Flemming Besenbacher
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- DK-8000 Aarhus C
- Denmark
| | - Menglin Chen
- Interdisciplinary Nanoscience Center (iNANO)
- Aarhus University
- DK-8000 Aarhus C
- Denmark
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Li D, Pan X, Sun B, Wu T, Chen W, Huang C, Ke Q, EI-Hamshary HA, Al-Deyab SS, Mo X. Nerve conduits constructed by electrospun P(LLA-CL) nanofibers and PLLA nanofiber yarns. J Mater Chem B 2015; 3:8823-8831. [DOI: 10.1039/c5tb01402f] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Nerve conduits constructed by PLLA nanofiber yarns could facilitate the proliferation, spreading, and migration of SC cells.
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32
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Thadavirul N, Pavasant P, Supaphol P. Improvement of dual-leached polycaprolactone porous scaffolds by incorporating with hydroxyapatite for bone tissue regeneration. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1986-2008. [PMID: 25291106 DOI: 10.1080/09205063.2014.966800] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Polycaprolactone (PCL)/hydroxyapatite (HA) composite scaffolds were prepared by combining solvent casting and salt particulate leaching with a polymer leaching technique. The hydrophilicity of the dual-leached scaffold was improved by alkaline (NaOH) treatment. Well-defined interconnected pores were detected by scanning electron microscopy. The water absorption capacity of the NaOH-treated PCL/HA dual-leached scaffold increased greatly, confirming that the hydrophilicity of the scaffold was improved by NaOH treatment. The compressive modulus of the PCL/HA dual-leached scaffold was greatly increased by the addition of HA particles. An indirect evaluation of the cytotoxicity of all PCL dual-leached scaffolds with mouse fibroblastic cells (L929) and mouse calvaria-derived pre-osteoblastic cells (MC3T3-E1) indicated that the PCL dual-leached scaffolds are non-toxic to cells. The ability of the scaffolds to support mouse calvaria-derived pre-osteoblastic cell (MC3T3-E1) attachment, proliferation, differentiation, and mineralization was also evaluated. Although the viability of cells was lower on the PCL/HA dual-leached scaffold than on the tissue-culture polystyrene plates (TCPS) and on the other substrates at early time points, both the PCL and NaOH-treated PCL/HA dual-leached scaffolds supported the attachment of MC3T3-E1 at significantly higher levels than TCPS. During the proliferation period (days 1-3), all of the PCL dual-leached scaffolds were able to support the proliferation of MC3T3-E1 at higher levels than the TCPS; in addition, the cells grown on NaOH-treated PCL/HA dual-leached scaffolds proliferated more rapidly. The cells cultured on the surfaces of NaOH-treated PCL/HA dual-leached scaffolds had the highest rate of mineral deposition.
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Affiliation(s)
- Napaphat Thadavirul
- a The Petroleum and Petrochemical College and the Center of Excellence on Petrochemical and Materials Technology (PETROMAT) , Chulalongkorn University , Bangkok 10330 , Thailand
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Masaeli E, Wieringa PA, Morshed M, Nasr-Esfahani MH, Sadri S, van Blitterswijk CA, Moroni L. Peptide functionalized polyhydroxyalkanoate nanofibrous scaffolds enhance Schwann cells activity. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2014; 10:1559-69. [DOI: 10.1016/j.nano.2014.04.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2013] [Revised: 03/19/2014] [Accepted: 04/20/2014] [Indexed: 12/18/2022]
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Fabrication of polycaprolactone nanofibrous scaffolds by facile phase separation approach. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 44:201-8. [PMID: 25280697 DOI: 10.1016/j.msec.2014.08.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 07/02/2014] [Accepted: 08/01/2014] [Indexed: 11/24/2022]
Abstract
Three-dimensional polycaprolactone (PCL) scaffolds with spherulite and nanofibrous structures were fabricated for the first time by thermally induced phase separation from a ternary PCL/dioxane/water system. Moreover, the effects of polymer concentration, aging temperature and the ratio of dioxane to water on the morphology of nanofibrous scaffolds were investigated. The result revealed that gelation, aging temperature, and ratio of solvents significantly influenced the formation of the unique spherulite and nanofibrous structures. The apatite-formation ability test showed relatively rapid growth of carbonate hydroxyapatite in the nanofibrous PCL scaffold with macropore compared to the other two scaffolds with smooth structure and nanofibrous structure without macropore, respectively, indicating good apatite-formation ability of the macroporous and nanofibrous PCL scaffolds.
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35
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Wang X, Zachman AL, Chun YW, Shen FW, Hwang YS, Sung HJ. Polymeric stent materials dysregulate macrophage and endothelial cell functions: implications for coronary artery stent. Int J Cardiol 2014; 174:688-95. [PMID: 24820736 DOI: 10.1016/j.ijcard.2014.04.228] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 03/12/2014] [Accepted: 04/19/2014] [Indexed: 02/02/2023]
Abstract
BACKGROUND Biodegradable polymers have been applied as bulk or coating materials for coronary artery stents. The degradation of polymers, however, could induce endothelial dysfunction and aggravate neointimal formation. Here we use polymeric microparticles to simulate and demonstrate the effects of degraded stent materials on phagocytic activity, cell death and dysfunction of macrophages and endothelial cells. METHODS Microparticles made of low molecular weight polyesters were incubated with human macrophages and coronary artery endothelial cells (ECs). Microparticle-induced phagocytosis, cytotoxicity, apoptosis, cytokine release and surface marker expression were determined by immunostaining or ELISA. Elastase expression was analyzed by ELISA and the elastase-mediated polymer degradation was assessed by mass spectrometry. RESULTS We demonstrated that poly(D,L-lactic acid) (PLLA) and polycaprolactone (PCL) microparticles induced cytotoxicity in macrophages and ECs, partially through cell apoptosis. The particle treatment alleviated EC phagocytosis, as opposed to macrophages, but enhanced the expression of vascular cell adhesion molecule (VCAM)-1 along with decreased nitric oxide production, indicating that ECs were activated and lost their capacity to maintain homeostasis. The activation of both cell types induced the release of elastase or elastase-like protease, which further accelerated polymer degradation. CONCLUSIONS This study revealed that low molecule weight PLLA and PCL microparticles increased cytotoxicity and dysregulated endothelial cell function, which in turn enhanced elastase release and polymer degradation. These indicate that polymer or polymer-coated stents impose a risk of endothelial dysfunction after deployment which can potentially lead to delayed endothelialization, neointimal hyperplasia and late thrombosis.
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Affiliation(s)
- Xintong Wang
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Angela L Zachman
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Young Wook Chun
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Fang-Wen Shen
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States
| | - Yu-Shik Hwang
- Department of Maxillofacial Biomedical Engineering, Kyung Hee University, Seoul, South Korea
| | - Hak-Joon Sung
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37235, United States; Department of Maxillofacial Biomedical Engineering, Kyung Hee University, Seoul, South Korea.
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36
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Thadavirul N, Pavasant P, Supaphol P. Development of polycaprolactone porous scaffolds by combining solvent casting, particulate leaching, and polymer leaching techniques for bone tissue engineering. J Biomed Mater Res A 2013. [DOI: 10.1002/jbm.a.35010] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Napapaphat Thadavirul
- The Petroleum and Petrochemical College and the Center of Excellence on Petrochemical and Materials Technology (PETROMAT); Chulalongkorn University; Bangkok 10330 Thailand
| | - Prasit Pavasant
- Department of Anatomy; Faculty of Dentistry; Chulalongkorn University; Bangkok 10330 Thailand
| | - Pitt Supaphol
- The Petroleum and Petrochemical College and the Center of Excellence on Petrochemical and Materials Technology (PETROMAT); Chulalongkorn University; Bangkok 10330 Thailand
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37
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Sadiasa A, Nguyen TH, Lee BT. In vitroandin vivoevaluation of porous PCL-PLLA 3D polymer scaffolds fabricated via salt leaching method for bone tissue engineering applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 25:150-67. [DOI: 10.1080/09205063.2013.846633] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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38
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Zamani F, Amani-Tehran M, Latifi M, Shokrgozar MA, Zaminy A. Promotion of spinal cord axon regeneration by 3D nanofibrous core-sheath scaffolds. J Biomed Mater Res A 2013; 102:506-13. [DOI: 10.1002/jbm.a.34703] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 01/06/2013] [Accepted: 02/19/2013] [Indexed: 11/08/2022]
Affiliation(s)
- F. Zamani
- Department of Textile Engineering; Textile Research and Excellence Centers, Amirkabir University of Technology; Tehran Iran
| | - M. Amani-Tehran
- Department of Textile Engineering; Textile Research and Excellence Centers, Amirkabir University of Technology; Tehran Iran
| | - M. Latifi
- Department of Textile Engineering; Textile Research and Excellence Centers, Amirkabir University of Technology; Tehran Iran
| | | | - A. Zaminy
- Department of Anatomy and cell Biology; School of Medicine, Shahid Beheshti University of Medical Sciences; Tehran Iran
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Correia DM, Ribeiro C, Ferreira JC, Botelho G, Ribelles JLG, Lanceros-Méndez S, Sencadas V. Influence of electrospinning parameters on poly(hydroxybutyrate) electrospun membranes fiber size and distribution. POLYM ENG SCI 2013. [DOI: 10.1002/pen.23704] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Daniela M. Correia
- Centro/Departamento de Física da Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
- Department of Química; Centro de Química, Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Clarisse Ribeiro
- Centro/Departamento de Física da Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - José C.C. Ferreira
- Centro/Departamento de Física da Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Gabriela Botelho
- Department of Química; Centro de Química, Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - José Luis Gomez Ribelles
- Center for Biomaterials and Tissue Engineering; Universitat Politècnica de València; Camino de Vera s/n 46022 Valencia Spain
- Ciber en Bioingeniería; Biomateriales y Nanomedicina (CIBER-BBN); Valencia Spain
| | - Senentxu Lanceros-Méndez
- Centro/Departamento de Física da Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
| | - Vitor Sencadas
- Centro/Departamento de Física da Universidade do Minho; Campus de Gualtar 4710-057 Braga Portugal
- Escola Superior de Tecnologia; Instituto Politécnico do Cávado e do Ave; Campus do IPCA 4750-810 Barcelos Portugal
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Leszczak V, Smith BS, Popat KC. Hemocompatibility of polymeric nanostructured surfaces. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1529-48. [PMID: 23848447 DOI: 10.1080/09205063.2013.777228] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Tissue integration is an important property when inducing transplant tolerance, however, the hemocompatibility of the biomaterial surface also plays an important role in the ultimate success of the implant. Therefore, in order to induce transplant tolerance, it is critical to understand the interaction of blood components with the material surfaces. In this study, we have investigated the adsorption of key blood serum proteins, in vitro adhesion and activation of platelets and clotting kinetics of whole blood on flat polycaprolactone (PCL) surfaces, nanowire (NW) surfaces and nanofiber (NF) surfaces. Previous studies have shown that polymeric nanostructured surfaces improve cell adhesion, proliferation and viability; however it is unclear how these polymeric nanostructured surfaces interact with the blood and its components. Protein adsorption results indicate that while there were no significant differences in total albumin (ALB) adsorption on PCL, NW and NF surfaces, NW surfaces had higher total fibrinogen (FIB) and immunoglobulin-G (IgG) adsorption compared to NF and PCL surfaces. In contrast, NF surfaces had higher surface FIB and IgG adsorption compared to PCL and NW surfaces. Platelet adhesion and viability studies show more adhesion and clustering of platelets on the NF surfaces as compared to PCL and NW surfaces. Platelet activation studies reveal that NW surfaces have the highest percentage of unactivated platelets, whereas NF surfaces have the highest percentage of fully activated platelets. Whole blood clotting results indicate that NW surfaces maintain an increased amount of free hemoglobin during the clotting process compared to PCL and NF surface, indicating less clotting and slower rate of clotting on their surfaces.
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Affiliation(s)
- Victoria Leszczak
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, 80523, USA
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41
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Masaeli E, Morshed M, Nasr-Esfahani MH, Sadri S, Hilderink J, van Apeldoorn A, van Blitterswijk CA, Moroni L. Fabrication, characterization and cellular compatibility of poly(hydroxy alkanoate) composite nanofibrous scaffolds for nerve tissue engineering. PLoS One 2013; 8:e57157. [PMID: 23468923 PMCID: PMC3584130 DOI: 10.1371/journal.pone.0057157] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2012] [Accepted: 01/18/2013] [Indexed: 12/31/2022] Open
Abstract
Tissue engineering techniques using a combination of polymeric scaffolds and cells represent a promising approach for nerve regeneration. We fabricated electrospun scaffolds by blending of Poly (3-hydroxybutyrate) (PHB) and Poly (3-hydroxy butyrate-co-3- hydroxyvalerate) (PHBV) in different compositions in order to investigate their potential for the regeneration of the myelinic membrane. The thermal properties of the nanofibrous blends was analyzed by differential scanning calorimetry (DSC), which indicated that the melting and glass temperatures, and crystallization degree of the blends decreased as the PHBV weight ratio increased. Raman spectroscopy also revealed that the full width at half height of the band centered at 1725 cm(-1) can be used to estimate the crystalline degree of the electrospun meshes. Random and aligned nanofibrous scaffolds were also fabricated by electrospinning of PHB and PHBV with or without type I collagen. The influence of blend composition, fiber alignment and collagen incorporation on Schwann cell (SCs) organization and function was investigated. SCs attached and proliferated over all scaffolds formulations up to 14 days. SCs grown on aligned PHB/PHBV/collagen fibers exhibited a bipolar morphology that oriented along the fiber direction, while SCs grown on the randomly oriented fibers had a multipolar morphology. Incorporation of collagen within nanofibers increased SCs proliferation on day 14, GDNF gene expression on day 7 and NGF secretion on day 6. The results of this study demonstrate that aligned PHB/PHBV electrospun nanofibers could find potential use as scaffolds for nerve tissue engineering applications and that the presence of type I collagen in the nanofibers improves cell differentiation.
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Affiliation(s)
- Elahe Masaeli
- Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran
- Department of Cell and Molecular Biology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
- Department of Tissue Regeneration, University of Twente, Enschede, The Netherlands
| | - Mohammad Morshed
- Department of Textile Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Mohammad Hossein Nasr-Esfahani
- Department of Cell and Molecular Biology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - Saeid Sadri
- Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan, Iran
| | - Janneke Hilderink
- Department of Tissue Regeneration, University of Twente, Enschede, The Netherlands
| | - Aart van Apeldoorn
- Department of Tissue Regeneration, University of Twente, Enschede, The Netherlands
| | | | - Lorenzo Moroni
- Department of Tissue Regeneration, University of Twente, Enschede, The Netherlands
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Jain S, Sharma A, Basu B. In vitrocytocompatibility assessment of amorphous carbon structures using neuroblastoma and Schwann cells. J Biomed Mater Res B Appl Biomater 2013; 101:520-31. [DOI: 10.1002/jbm.b.32852] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/20/2012] [Accepted: 10/05/2012] [Indexed: 12/12/2022]
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Uto K, Muroya T, Okamoto M, Tanaka H, Murase T, Ebara M, Aoyagi T. Design of super-elastic biodegradable scaffolds with longitudinally oriented microchannels and optimization of the channel size for Schwann cell migration. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:064207. [PMID: 27877534 PMCID: PMC5099767 DOI: 10.1088/1468-6996/13/6/064207] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Accepted: 10/03/2012] [Indexed: 06/04/2023]
Abstract
We newly designed super-elastic biodegradable scaffolds with longitudinally oriented microchannels for repair and regeneration of peripheral nerve defects. Four-armed poly(ε-caprolactone-co-D,L-lactide)s (P(CL-co-DLLA)s) were synthesized by ring-opening copolymerization of CL and DLLA from terminal hydroxyl groups of pentaerythritol, and acryloyl chloride was then reacted with the ends of the chains. The end-functionalized P(CL-co-DLLA) was crosslinked in a cylindrical mold in the presence of longitudinally oriented silica fibers as the templates, which were later dissolved by hydrofluoric acid. The elastic moduli of the crosslinked P(CL-co-DLLA)s were controlled between 10-1 and 102 MPa at 37 °C, depending on the composition. The scaffolds could be elongated to 700% of their original size without fracture or damage ('super-elasticity'). Scanning electron microscopy images revealed that well-defined and highly aligned multiple channels consistent with the mold design were produced in the scaffolds. Owing to their elastic nature, the microchannels in the scaffolds did not collapse when they were bent to 90°. To evaluate the effect of the channel diameter on Schwann cell migration, microchannels were also fabricated in transparent poly(dimethylsiloxane), allowing observation of cell migration. The migration speed increased with channel size, but the Young's modulus of the scaffold decreased as the channel diameter increased. These findings may serve as the basis for designing tissue-engineering scaffolds for nerve regeneration and investigating the effects of the geometrical and dimensional properties on axonal outgrowth.
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Affiliation(s)
- Koichiro Uto
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Takanari Muroya
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Michio Okamoto
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Hiroyuki Tanaka
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Tsuyoshi Murase
- Department of Orthopaedic Surgery, Osaka University Graduate School of Medicine, Osaka, 565-0871, Japan
| | - Mitsuhiro Ebara
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
| | - Takao Aoyagi
- Biomaterials Unit, International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan
- Department of Materials Engineering, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
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Norowski PA, Fujiwara T, Clem WC, Adatrow PC, Eckstein EC, Haggard WO, Bumgardner JD. Novel naturally crosslinked electrospun nanofibrous chitosan mats for guided bone regeneration membranes: material characterization and cytocompatibility. J Tissue Eng Regen Med 2012; 9:577-83. [DOI: 10.1002/term.1648] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 07/22/2012] [Accepted: 10/17/2012] [Indexed: 11/11/2022]
Affiliation(s)
- Peter A. Norowski
- University of Memphis; Department of Biomedical Engineering; Memphis TN USA
| | - Tomoko Fujiwara
- University of Memphis; Department of Chemistry; Memphis TN USA
| | | | - Pradeep C. Adatrow
- University of Tennessee Health Science Centre; Department of Periodontology; Memphis TN USA
| | - Eugene C. Eckstein
- University of Memphis; Department of Biomedical Engineering; Memphis TN USA
| | - Warren O. Haggard
- University of Memphis; Department of Biomedical Engineering; Memphis TN USA
| | - Joel D. Bumgardner
- University of Memphis; Department of Biomedical Engineering; Memphis TN USA
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45
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Ruckh TT, Carroll DA, Weaver JR, Popat KC. Mineralization content alters osteogenic responses of bone marrow stromal cells on hydroxyapatite/polycaprolactone composite nanofiber scaffolds. J Funct Biomater 2012; 3:776-98. [PMID: 24955747 PMCID: PMC4030926 DOI: 10.3390/jfb3040776] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 09/25/2012] [Accepted: 10/24/2012] [Indexed: 02/07/2023] Open
Abstract
Synthetic tissue scaffolds have a high potential impact for patients experiencing osteogenesis imperfecta. Using electrospinning, tissue scaffolds composed of hydroxyapatite/polycaprolactone (HAp/PCL) composite nanofibers were fabricated with two different HAp concentrations—1% and 10% of the solid scaffold weight. After physico-chemical scaffold characterization, rat bone marrow stromal cells were cultured on the composite scaffolds in maintenance medium and then in osteogenic medium. Quantitative PCR, colorimetric assays, immunofluorescent labeling, and electron microscopy measured osteogenic cell responses to the HAp/PCL scaffolds. In maintenance conditions, both Hap/PCL scaffolds and control scaffolds supported cell colonization through seven days with minor differences. In osteogenic conditions, the 10% HAp scaffolds exhibited significantly increased ALP assay levels at week 3, consistent with previous reports. However, qPCR analysis demonstrated an overall decrease in bone matrix-associated genes on Hap/PCL scaffolds. Osteopontin and osteocalcin immunofluorescent microscopy revealed a trend that both mineralized scaffolds had greater amounts of both proteins, though qPCR results indicated the opposite trend for osteopontin. Additionally, type I collagen expression decreased on HAp scaffolds. These results indicate that cells are sensitive to minor changes in mineral content within nanofibers, even at just 1% w/w, and elucidating the sensing mechanism may lead to optimized osteogenic scaffold designs.
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Affiliation(s)
- Timothy T Ruckh
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
| | - Derek A Carroll
- Department of Mechanical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
| | - Justin R Weaver
- Department of Chemical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
| | - Ketul C Popat
- School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA.
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46
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Tan A, Rajadas J, Seifalian AM. Biochemical engineering nerve conduits using peptide amphiphiles. J Control Release 2012; 163:342-52. [PMID: 22910143 DOI: 10.1016/j.jconrel.2012.08.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/05/2012] [Accepted: 08/07/2012] [Indexed: 12/30/2022]
Abstract
Peripheral nerve injury is a debilitating condition. The gold standard for treatment is surgery, requiring an autologous nerve graft. Grafts are harvested from another part of the body (a secondary site) to treat the affected primary area. However, autologous nerve graft harvesting is not without risks, with associated problems including injury to the secondary site. Research into biomaterials has engendered the use of bioartificial nerve conduits as an alternative to autologous nerve grafts. These include synthetic and artificial materials, which can be manufactured into nerve conduits using techniques inspired by nanotechnology. Recent evidence indicates that peptide amphiphiles (PAs) are promising candidates for use as materials for bioengineering nerve conduits. PAs are biocompatible and biodegradable protein-based nanomaterials, capable of self-assembly in aqueous solutions. Their self-assembly system, coupled with their intrinsic capacity for carrying bioactive epitopes for tissue regeneration, form particularly novel attributes for biochemically-engineered materials. Furthermore, PAs can function as biomimetic materials and advanced drug delivery platforms for sustained and controlled release of a plethora of therapeutic agents. Here we review the realm of nerve conduit tissue engineering and the potential for PAs as viable materials in this exciting and rapidly advancing field.
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Affiliation(s)
- Aaron Tan
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK
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47
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Subramanian A, Krishnan UM, Sethuraman S. Axially aligned electrically conducting biodegradable nanofibers for neural regeneration. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1797-1809. [PMID: 22544170 DOI: 10.1007/s10856-012-4654-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Accepted: 04/14/2012] [Indexed: 05/31/2023]
Abstract
In this study, electrically conducting axially aligned nanofibers have developed to provide both electrical and structural cues. Poly(lactide-co-glycolide) (PLGA) with poly(3-hexylthiophene) (PHT) was electrospun into 2D random (196 ± 98 nm) and 3D axially aligned nanofibers (200 ± 80 nm). Electrospun random and aligned PLGA-PHT fibers were characterized for surface morphology, mechanical property, porosity, degradability, and electrical conductivity. The pore size of random PLGA-PHT nanofibers (6.0 ± 3.3 μm) were significantly higher than the aligned (1.9 ± 0.4 μm) (P < 0.05) and the Young's modulus of aligned scaffold was significantly lower than the random. Aligned nanofibers showed significantly lesser degradation rate and higher electrical conductivity (0.1 × 10(-5) S/cm) than random nanofibers (P < 0.05). Results of in vitro cell studies indicate that aligned PLGA-PHT nanofibers have a significant influence on the adhesion and proliferation of Schwann cells and could be potentially used as scaffold for neural regeneration.
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Affiliation(s)
- Anuradha Subramanian
- Center for Nanotechnology & Advanced Biomaterials, School of Chemical & Biotechnology, SASTRA University, Thanjavur, 613 401, Tamil Nadu, India
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48
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Chuysinuan P, Pavasant P, Supaphol P. Preparation and characterization of caffeic acid-grafted electrospun poly(L-lactic acid) fiber mats for biomedical applications. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3031-3040. [PMID: 22577837 DOI: 10.1021/am300404v] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Caffeic acid (CA) was chemically immobilized onto the surfaces of the individual electrospun poly(l-lactic acid) (PLLA) fibers to enhance the hydrophilicity and impart the antioxidant activity to the obtained fibrous membranes. This was done in two sequential steps. First, amino groups were covalently introduced onto the surfaces through the reaction with 1,6-hexamethylenediamine (HMD). In the second step, the amino moieties reacted with CA, which had been preactivated sequentially with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The success of the reactions was confirmed by the ninhydrin assay and X-ray photoelectron spectroscopic analysis (XPS). Indirect cytotoxicity evaluation with murine dermal fibroblasts (L929) and human dermal fibroblasts (HDFa) revealed that the neat and the modified PLLA fibrous matrices released no substances in the levels that were harmful to the cells. Direct culturing of HDFa on these fibrous substrates indicated that they supported the proliferation of the cells on days 2 and 3 very well and that the CA-immobilized substrates exhibited the highest cell viability. Lastly, the antioxidant activity of the CA-immobilized substrates, as revealed by the 1,1-diphenyl-2-picryldrazyl (DPPH) radical scavenging assay, was as high as 88% on average.
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Affiliation(s)
- Piyachat Chuysinuan
- The Petroleum Petrochemical College, The Center of Excellence on Petrochemical and Materials Technology, ‡Department of Anatomy, Faculty of Dentistry, Chulalongkorn University , Bangkok 10330, Thailand
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Norowski PA, Mishra S, Adatrow PC, Haggard WO, Bumgardner JD. Suture pullout strength andin vitrofibroblast and RAW 264.7 monocyte biocompatibility of genipin crosslinked nanofibrous chitosan mats for guided tissue regeneration. J Biomed Mater Res A 2012; 100:2890-6. [DOI: 10.1002/jbm.a.34224] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2012] [Revised: 03/16/2012] [Accepted: 04/23/2012] [Indexed: 11/09/2022]
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50
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Subramanian A, Krishnan UM, Sethuraman S. Fabrication, Characterization and In Vitro Evaluation of Aligned PLGA–PCL Nanofibers for Neural Regeneration. Ann Biomed Eng 2012; 40:2098-110. [DOI: 10.1007/s10439-012-0592-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2011] [Accepted: 05/08/2012] [Indexed: 12/29/2022]
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