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Abedin Dargoush S, Irani S, Naderi Sohi A, Soleimani M, Hanaee‐Ahvaz H. Chondroinductive impact of polyethersulfone/benzyl hyaluronate nanofibrous scaffold on human mesenchymal stem cells. POLYM ADVAN TECHNOL 2020. [DOI: 10.1002/pat.4984] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Shiva Irani
- Department of Biology, Science and Research Branch Islamic Azad University Tehran Iran
| | | | - Masoud Soleimani
- Hematology Department, Faculty of Medical Sciences Tarbiat Modares University Tehran Iran
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Arbade GK, Dongardive V, Rath SK, Tripathi V, Patro TU. Effect of poly(ethylene glycol) on drug delivery, antibacterial, biocompatible, physico-chemical and thermo-mechanical properties of PCL-chloramphenicol electrospun nanofiber scaffolds. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1817020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Gajanan Kashinathrao Arbade
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune- 411025, Maharashtra, India
| | - Vikas Dongardive
- National Centre for Cell Science, Pune- 411007, Maharashtra, India
| | - Sangram K. Rath
- Department of Polymer Science and Technology Directorate, Naval Materials Research Laboratory, Ambernath- 421506, Maharashtra, India
| | - Vidisha Tripathi
- National Centre for Cell Science, Pune- 411007, Maharashtra, India
| | - T. Umasankar Patro
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune- 411025, Maharashtra, India
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Liu S, Zheng Y, Liu R, Tian C. Preparation and characterization of a novel polylactic acid/hydroxyapatite composite scaffold with biomimetic micro-nanofibrous porous structure. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:74. [PMID: 32743750 DOI: 10.1007/s10856-020-06415-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Combining synthetic polymer scaffolds with inorganic bioactive factors is widely used to promote the bioactivity and bone conductivity of bone tissue. However, except for the chemical composition of scaffold, the biomimetic structure also plays an important role in its application. In this study, we report the fabrication of polylactic acid/hydroxyapatite (PLA/HA) composite nanofibrous scaffolds via phase separation method to mimic the native extracellular matrix (ECM). The SEM analysis showed that the addition of HA dramatically impacted the morphology of the PLA matrix, which changed from 3D nanofibrous network structure to a disorderly micro-nanofibrous porous structure. At the same time, HA particles could be evenly dispersed at the end of the fiber. The FTIR and XRD demonstrated that there was not any chemical interaction between PLA and HA. Thermal analyses showed that HA could decrease the crystallization of PLA, but improve the thermal decomposition temperature of the composite scaffold. Moreover, water contact angle analysis of the PLA/HA composite scaffold demonstrated that the hydrophilicity increased with the addition of HA. Furthermore, apatite-formation ability tests confirmed that HA could not only more and faster induced the deposition of weak hydroxyapatite but also induced specific morphology of HA.
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Affiliation(s)
- Shuqiong Liu
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, PR China
- College of Ecology and Resource Engineering, Wuyi University, Wuyishan, 354300, PR China
| | - Yuying Zheng
- College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350108, PR China.
| | - Ruilai Liu
- College of Ecology and Resource Engineering, Wuyi University, Wuyishan, 354300, PR China
| | - Chao Tian
- College of Ecology and Resource Engineering, Wuyi University, Wuyishan, 354300, PR China
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Ashinsky BG, Gullbrand SE, Bonnevie ED, Wang C, Kim DH, Han L, Mauck RL, Smith HE. Sacrificial Fibers Improve Matrix Distribution and Micromechanical Properties in a Tissue-Engineered Intervertebral Disc. Acta Biomater 2020; 111:232-241. [PMID: 32447064 DOI: 10.1016/j.actbio.2020.05.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/13/2020] [Accepted: 05/14/2020] [Indexed: 12/19/2022]
Abstract
Tissue-engineered replacement discs are an area of intense investigation for the treatment of end-stage intervertebral disc (IVD) degeneration. These living implants can integrate into the IVD space and recapitulate native motion segment function. We recently developed a multiphasic tissue-engineered disc-like angle-ply structure (DAPS) that models the micro-architectural and functional features of native tissue. While these implants resulted in functional restoration of the motion segment in rat and caprine models, we also noted deficiencies in cell infiltration and homogeneity of matrix deposition in the electrospun poly(ε-caprolactone) outer region (annulus fibrosus, AF) of the DAPS. To address this limitation, here, we incorporated a sacrificial water-soluble polymer, polyethylene oxide (PEO), as a second fiber fraction within the AF region to increase porosity of the implant. Maturation of these PEO-modified DAPS were evaluated after 5 and 10 weeks of in vitro culture in terms of AF biochemical content, MRI T2 values, overall construct mechanical properties, AF micromechanical properties and cell and matrix distribution. To assess the performance of the PEO-modified DAPS in vivo, precultured constructs were implanted into the rat caudal IVD space for 10 weeks. Results showed that matrix distribution was more homogenous in PCL/PEO DAPS, as evidenced by more robust histological staining, organized collagen deposition and micromechanical properties, compared to standard PCL-only DAPS in vitro. Cell and matrix infiltration were also improved in vivo, but no differences in macromechanical properties and a trend towards improved micromechanical properties were observed. These findings demonstrate that the inclusion of a sacrificial PEO fiber fraction in the DAPS AF region improves cellular colonization, matrix elaboration, and in vitro and in vivo function of an engineered IVD implant. STATEMENT OF SIGNIFICANCE: This work establishes a method for improving cell infiltration and matrix distribution within tissue-engineered dense fibrous scaffolds for intervertebral disc replacement. Tissue-engineered whole disc replacements are an attractive alternative to the current gold standard (mechanical disc arthroplasty or vertebral fusion) for the clinical treatment of patients with advanced disc degeneration.
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Kim HS, Mandakhbayar N, Kim HW, Leong KW, Yoo HS. Protein-reactive nanofibrils decorated with cartilage-derived decellularized extracellular matrix for osteochondral defects. Biomaterials 2020; 269:120214. [PMID: 32736808 DOI: 10.1016/j.biomaterials.2020.120214] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/06/2020] [Accepted: 06/18/2020] [Indexed: 12/17/2022]
Abstract
Cartilage defect is difficult to heal due to its avascular properties. Implantation of mesenchymal stem cell is one of the most promising approach for regenerating cartilage defects. Here we prepared polymeric nanofibrils decorated with cartilage-derived decellularized extracellular matrix (dECM) as a chondroinductive scaffold material for cartilage repair. To fabricate nanofibrils, eletrospun PCL nanofibers were fragmented by subsequent mechanical and chemical process. The nanofibrils were surface-modified with poly(glycidyl methacrylate) (PGMA@NF) via surface-initiated atom transfer radical polymerization (SI-ATRP). The epoxy groups of PGMA@NF were subsequently reacted with dECM prepared from bovine articular cartilage. Therefore, the cartilage-dECM-decorated nanofibrils structurally and biochemically mimic cartilage-specific microenvironment. Once adipose-derived stem cells (ADSCs) were self-assembled with the cartilage-dECM-decorated nanofibrils by cell-directed association, they exhibited differentiation hallmarks of chondrogenesis without additional biologic additives. ADSCs in the nanofibril composites significantly increased expression of chondrogenic gene markers in comparison to those in pellet culture. Furthermore, ADSC-laden nanofibril composites filled the osteochondral defects compactly due to their clay-like texture. Thus, the ADSC-laden nanofibril composites supported the long-term regeneration of 12 weeks without matrix loss during joint movement. The defects treated with the ADSC-laden PGMA@NF significantly facilitated reconstruction of their cartilage and subchondral bone ECM matrices compared to those with ADSC-laden nanofibrils, non-specifically adsorbing cartilage-dECM without surface decoration of PGMA.
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Affiliation(s)
- Hye Sung Kim
- Department of Biomedical Materials Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea; Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea; Department of Biomateials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY, 10027, USA
| | - Hyuk Sang Yoo
- Department of Biomedical Materials Engineering, Kangwon National University, Chuncheon, 24341, Republic of Korea; Institute of Molecular Science and Fusion Technology, Kangwon National University, Republic of Korea.
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Zonderland J, Rezzola S, Wieringa P, Moroni L. Fiber diameter, porosity and functional group gradients in electrospun scaffolds. Biomed Mater 2020; 15:045020. [DOI: 10.1088/1748-605x/ab7b3c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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57
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Arbade GK, Srivastava J, Tripathi V, Lenka N, Patro TU. Enhancement of hydrophilicity, biocompatibility and biodegradability of poly(ε-caprolactone) electrospun nanofiber scaffolds using poly(ethylene glycol) and poly(L-lactide-co-ε-caprolactone-co-glycolide) as additives for soft tissue engineering. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:1648-1670. [PMID: 32402230 DOI: 10.1080/09205063.2020.1769799] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
In this study, poly(ε-caprolactone) (PCL) has been blended with a more hydrophilic poly(ethylene glycol) (PEG) and with a biocompatible block-co-polymer: poly(L-lactide-co-ε-caprolactone-co-glycolide) (PLCG) in order to improve hydrophilicity, biocompatibility and biodegradability of PCL. PCL and the blend solutions were subjected to electrospinning to produce nanofiber scaffolds by the addition of only 1 wt% of PEG and PLCG either singly or in combination in PCL to retain the mechanical properties of the scaffolds. PCL-PEG-PLCG ternary and two binary (PCL-PEG and PCL-PLCG) blend nanofiber scaffolds have been prepared for comparison. The resulting nanofibers showed a smooth and flaw-free surface and the diameter of the nanofibers displayed a normal distribution. The PCL-PEG nanofiber scaffold showed improved hydrophilicity [water contact angle (WCA) ∼84°] over pristine PCL (WCA ∼127°); while PCL-PLCG and PCL-PEG-PLCG scaffolds exhibited absolute wetting by water, likely due to high porosity. In vitro biocompatibility studies using gingival mesenchymal stem cells (gMSCs) suggested that, both the PCL and the blend scaffolds were biocompatible supporting cell-viability and growth of gMSCs following their seeding on these scaffolds. Biodegradation studies in phosphate buffer solution showed that the addition of PEG and PLCG in PCL increased the weight loss of scaffolds with time, indicating higher extent of biodegradation in the blend scaffolds and the weight loss followed the power law curve with time.
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Affiliation(s)
- Gajanan Kashinathrao Arbade
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, Maharashtra, India.,National Centre for Cell Science, Pune, Maharashtra, India
| | | | | | - Nibedita Lenka
- National Centre for Cell Science, Pune, Maharashtra, India
| | - T Umasankar Patro
- Department of Metallurgical and Materials Engineering, Defence Institute of Advanced Technology, Pune, Maharashtra, India
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58
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Zhao H, Tang J, Zhou D, Weng Y, Qin W, Liu C, Lv S, Wang W, Zhao X. Electrospun Icariin-Loaded Core-Shell Collagen, Polycaprolactone, Hydroxyapatite Composite Scaffolds for the Repair of Rabbit Tibia Bone Defects. Int J Nanomedicine 2020; 15:3039-3056. [PMID: 32431500 PMCID: PMC7200251 DOI: 10.2147/ijn.s238800] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Accepted: 04/08/2020] [Indexed: 12/21/2022] Open
Abstract
Background Electrospinning is a widely used technology that can produce scaffolds with high porosity and surface area for bone regeneration. However, the small pore sizes in electrospun scaffolds constrain cell growth and tissue-ingrowth. In this study, novel drug-loading core-shell scaffolds were fabricated via electrospinning and freeze drying to facilitate the repair of tibia bone defects in rabbit models. Materials and Methods The collagen core scaffolds were freeze-dried containing icariin (ICA)-loaded chitosan microspheres. The shell scaffolds were electrospun using collagen, polycaprolactone and hydroxyapatite materials to form CPH composite scaffolds with the ones containing ICA microspheres named CPHI. The core-shell scaffolds were then cross-linked by genipin. The morphology, microstructure, physical and mechanical properties of the scaffolds were assessed. Rat marrow mesenchymal stem cells from the wistar rat were cultured with the scaffolds. The cell adhesion and proliferation were analysed. Adult rabbit models with tibial plateau defects were used to evaluate the performance of these scaffolds in repairing the bone defects over 4 to 12 weeks. Results The results reveal that the novel drug-loading core-shell scaffolds were successfully fabricated, which showed good physical and chemical properties and appropriate mechanical properties. Furthermore, excellent cells attachment was observed on the CPHI scaffolds. The results from radiography, micro-computed tomography, histological and immunohistochemical analysis demonstrated that abundant new bones were formed on the CPHI scaffolds. Conclusion These new core-shell composite scaffolds have great potential for bone tissue engineering applications and may lead to effective bone regeneration and repair.
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Affiliation(s)
- Hongbin Zhao
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Junjie Tang
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Dong Zhou
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Yiping Weng
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Wen Qin
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Chun Liu
- Medical Research Centre, Changzhou Second People's Hospital Affiliated to Nanjing Medical University, Changzhou 213164, People's Republic of China
| | - Songwei Lv
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, People's Republic of China
| | - Wei Wang
- Medical School, Hexi University, Zhangye 730041, People's Republic of China
| | - Xiubo Zhao
- School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, People's Republic of China.,Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
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59
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Lin W, Chen M, Qu T, Li J, Man Y. Three‐dimensional electrospun nanofibrous scaffolds for bone tissue engineering. J Biomed Mater Res B Appl Biomater 2020; 108:1311-1321. [PMID: 31436374 DOI: 10.1002/jbm.b.34479] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/13/2019] [Accepted: 08/06/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Weimin Lin
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of StomatologySichuan University Chengdu China
- Department of Oral Implantology, West China Hospital of StomatologySichuan University Chengdu China
| | - Miao Chen
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of StomatologySichuan University Chengdu China
| | - Tao Qu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of StomatologySichuan University Chengdu China
| | - Jidong Li
- Research Center for Nano‐Biomaterials, Analytical and Testing CenterSichuan University Chengdu China
| | - Yi Man
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, West China Hospital of StomatologySichuan University Chengdu China
- Department of Oral Implantology, West China Hospital of StomatologySichuan University Chengdu China
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Abstract
Connective tissues within the synovial joints are characterized by their dense extracellular matrix and sparse cellularity. With injury or disease, however, tissues commonly experience an influx of cells owing to proliferation and migration of endogenous mesenchymal cell populations, as well as invasion of the tissue by other cell types, including immune cells. Although this process is critical for successful wound healing, aberrant immune-mediated cell infiltration can lead to pathological inflammation of the joint. Importantly, cells of mesenchymal or haematopoietic origin use distinct modes of migration and thus might respond differently to similar biological cues and microenvironments. Furthermore, cell migration in the physiological microenvironment of musculoskeletal tissues differs considerably from migration in vitro. This Review addresses the complexities of cell migration in fibrous connective tissues from three separate but interdependent perspectives: physiology (including the cellular and extracellular factors affecting 3D cell migration), pathophysiology (cell migration in the context of synovial joint autoimmune disease and injury) and tissue engineering (cell migration in engineered biomaterials). Improved understanding of the fundamental mechanisms governing interstitial cell migration might lead to interventions that stop invasion processes that culminate in deleterious outcomes and/or that expedite migration to direct endogenous cell-mediated repair and regeneration of joint tissues.
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61
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Yilmaz EN, Zeugolis DI. Electrospun Polymers in Cartilage Engineering-State of Play. Front Bioeng Biotechnol 2020; 8:77. [PMID: 32133352 PMCID: PMC7039817 DOI: 10.3389/fbioe.2020.00077] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 01/29/2020] [Indexed: 12/17/2022] Open
Abstract
Articular cartilage defects remain a clinical challenge. Articular cartilage defects progress to osteoarthritis, which negatively (e.g., remarkable pain, decreased mobility, distress) affects millions of people worldwide and is associated with excessive healthcare costs. Surgical procedures and cell-based therapies have failed to deliver a functional therapy. To this end, tissue engineering therapies provide a promise to deliver a functional cartilage substitute. Among the various scaffold fabrication technologies available, electrospinning is continuously gaining pace, as it can produce nano- to micro- fibrous scaffolds that imitate architectural features of native extracellular matrix supramolecular assemblies and can deliver variable cell populations and bioactive molecules. Herein, we comprehensively review advancements and shortfalls of various electrospun scaffolds in cartilage engineering.
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Affiliation(s)
- Elif Nur Yilmaz
- Regenerative, Modular & Developmental Engineering Laboratory, National University of Ireland Galway, Galway, Ireland.,Science Foundation Ireland, Centre for Research in Medical Devices, National University of Ireland Galway, Galway, Ireland
| | - Dimitrios I Zeugolis
- Regenerative, Modular & Developmental Engineering Laboratory, National University of Ireland Galway, Galway, Ireland.,Science Foundation Ireland, Centre for Research in Medical Devices, National University of Ireland Galway, Galway, Ireland
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Doostmohammadi M, Forootanfar H, Ramakrishna S. Regenerative medicine and drug delivery: Progress via electrospun biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 109:110521. [PMID: 32228899 DOI: 10.1016/j.msec.2019.110521] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 12/01/2019] [Accepted: 12/02/2019] [Indexed: 02/07/2023]
Abstract
Worldwide research on electrospinning enabled it as a versatile technique for producing nanofibers with specified physio-chemical characteristics suitable for diverse biomedical applications. In the case of tissue engineering and regenerative medicine, the nanofiber scaffolds' characteristics are custom designed based on the cells and tissues specific needs. This fabrication technique is also innovated for the production of nanofibers with special micro-structure and secondary structure characteristics such as porous fibers, hollow structure, and core- sheath structure. This review attempts to critically and succinctly capture the vast number of developments reported in the literature over the past two decades. We then discuss their applications as scaffolds for induction of cells growth and differentiation or as architecture for being used as graft for tissue engineering. The special nanofibers designed for improving regeneration of several tissues including heart, bone, central nerve system, spinal cord, skin and ocular tissue are introduced. We also discuss the potential of the electrospinning in drug delivery applications, which is a critical factor for cell culture, tissue formation and wound healing applications.
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Affiliation(s)
- Mohsen Doostmohammadi
- Pharmaceutics Research Center, Institute of Neuropharmacology, Kerman University of Medical Sciences, Kerman, Iran
| | - Hamid Forootanfar
- Pharmaceutical Sciences and Cosmetic Products Research Center, Kerman University of Medical Sciences, Kerman, Iran; Herbal and Traditional Medicines Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Seeram Ramakrishna
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore.
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63
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Chen L, Al-Shawk A, Rea C, Mazeh H, Wu X, Chen W, Li Y, Song W, Markel DC, Ren W. Preparation of electrospun nanofibers with desired microstructures using a programmed three-dimensional (3D) nanofiber collector. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 106:110188. [PMID: 31753331 DOI: 10.1016/j.msec.2019.110188] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/28/2019] [Accepted: 09/09/2019] [Indexed: 02/06/2023]
Abstract
The traditional electrospinning process produces dense two-dimensional (2D) nanofiber (NF) sheets that limit cell infiltration and proliferation. Our previous study demonstrated that 3D NF sheets could be formed on an NF collector surface mounted with multiple movable needles through the corona discharge. In this study, we developed a programmed electrospun 3D NF collector. It can precisely control the moving speed of NF collector during electrospinning; thereby fabricating 3D NFs with desired microstructures (pore size, pore volume, and interconnectivity). Four types of polycaprolactone (PCL) 3D NF matrices with different microstructures can be obtained concurrently on the NF collector surface, which are set by different forward moving speed of the NF collector device: NF-zero (no move, as control), NF-low (0.085 mm/min), NF-mid (0.158 mm/min) and NF-high (0.232 mm/min). A linear increase of the NF sheet thickness (from 0.21 mm to 0.91 mm) was recorded with accelerating collector movement. Quantitative analysis using scanning electron microscopy (SEM), micro-computed tomography (μ-CT), and confocal laser scanning microscopy (CLSM) showed a monotonic increase of pore size and porosity with the increase of collector moving speeds. The collector movement also impacted the crystallinity and mechanical properties of the NFs. When prepared at high collector speed, the NFs showed improved proliferation and differentiation (p < .05) of pre-osteoblastic MC3T3 cells compared to the NFs from the static collector. A programmed NF collector device allows for the reproducible, precise and continuous fabrication of 3D NFs with tailorable geometry and microstructures. This simple, controllable, one-step process could promote the clinical translation of electrospun NFs in tissue engineering and regenerative medicine.
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Affiliation(s)
- Liang Chen
- Department of Biomedical Engineering, Wayne State University, Detroit, MI 48201, USA
| | - Ameer Al-Shawk
- Department of Mechanic Engineering, Wayne State University, Detroit, MI 48201, USA
| | - Christopher Rea
- Department of Engineering Technology, Wayne State University, Detroit, MI 48201, USA
| | - Hanan Mazeh
- Department of Biomedical Engineering, Wayne State University, Detroit, MI 48201, USA
| | - Xin Wu
- Department of Mechanic Engineering, Wayne State University, Detroit, MI 48201, USA
| | - Wen Chen
- Department of Engineering Technology, Wayne State University, Detroit, MI 48201, USA
| | - Yawen Li
- Department of Biomedical Engineering, Lawrence Technological University, Southfield, MI 48075, USA
| | - Wei Song
- Department of Biomedical Engineering, Wayne State University, Detroit, MI 48201, USA
| | - David C Markel
- Department of Orthopedics, Providence Hospital and Medical Center, Southfield, MI 48075, USA
| | - Weiping Ren
- Department of Biomedical Engineering, Wayne State University, Detroit, MI 48201, USA; Department of Orthopedics, Providence Hospital and Medical Center, Southfield, MI 48075, USA; John D. Dingle VA Medical Center, Detroit, MI 48202, USA.
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64
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Tan GZ, Zhou Y. Electrospinning of biomimetic fibrous scaffolds for tissue engineering: a review. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1636248] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- George Z. Tan
- Department of Industrial, Manufacturing and Systems Engineering, Texas Tech University, Lubbock, TX, USA
| | - Yingge Zhou
- Department of Industrial, Manufacturing and Systems Engineering, Texas Tech University, Lubbock, TX, USA
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65
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Ameer JM, Pr AK, Kasoju N. Strategies to Tune Electrospun Scaffold Porosity for Effective Cell Response in Tissue Engineering. J Funct Biomater 2019; 10:E30. [PMID: 31324062 PMCID: PMC6787600 DOI: 10.3390/jfb10030030] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 12/20/2022] Open
Abstract
Tissue engineering aims to develop artificial human tissues by culturing cells on a scaffold in the presence of biochemical cues. Properties of scaffold such as architecture and composition highly influence the overall cell response. Electrospinning has emerged as one of the most affordable, versatile, and successful approaches to develop nonwoven nano/microscale fibrous scaffolds whose structural features resemble that of the native extracellular matrix. However, dense packing of the fibers leads to small-sized pores which obstruct cell infiltration and therefore is a major limitation for their use in tissue engineering applications. To this end, a variety of approaches have been investigated to enhance the pore properties of the electrospun scaffolds. In this review, we collect state-of-the-art modification methods and summarize them into six classes as follows: approaches focused on optimization of packing density by (a) conventional setup, (b) sequential or co-electrospinning setups, (c) involving sacrificial elements, (d) using special collectors, (e) post-production processing, and (f) other specialized methods. Overall, this review covers historical as well as latest methodologies in the field and therefore acts as a quick reference for those interested in electrospinning matrices for tissue engineering and beyond.
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Affiliation(s)
- Jimna Mohamed Ameer
- Division of Tissue Culture, Department of Applied Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, Kerala, India
| | - Anil Kumar Pr
- Division of Tissue Culture, Department of Applied Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, Kerala, India
| | - Naresh Kasoju
- Division of Tissue Culture, Department of Applied Biology, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, Kerala, India.
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Ahn CB, Son KH, Yu YS, Kim TH, Lee JI, Lee JW. Development of a flexible 3D printed scaffold with a cell-adhesive surface for artificial trachea. Biomed Mater 2019; 14:055001. [DOI: 10.1088/1748-605x/ab2a6c] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Li Y, Liao C, Tjong SC. Electrospun Polyvinylidene Fluoride-Based Fibrous Scaffolds with Piezoelectric Characteristics for Bone and Neural Tissue Engineering. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E952. [PMID: 31261995 PMCID: PMC6669491 DOI: 10.3390/nano9070952] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/14/2019] [Accepted: 06/15/2019] [Indexed: 02/07/2023]
Abstract
Polyvinylidene fluoride (PVDF) and polyvinylidene fluoride-trifluoroethylene (P(VDF-TrFE) with excellent piezoelectricity and good biocompatibility are attractive materials for making functional scaffolds for bone and neural tissue engineering applications. Electrospun PVDF and P(VDF-TrFE) scaffolds can produce electrical charges during mechanical deformation, which can provide necessary stimulation for repairing bone defects and damaged nerve cells. As such, these fibrous mats promote the adhesion, proliferation and differentiation of bone and neural cells on their surfaces. Furthermore, aligned PVDF and P(VDF-TrFE) fibrous mats can enhance neurite growth along the fiber orientation direction. These beneficial effects derive from the formation of electroactive, polar β-phase having piezoelectric properties. Polar β-phase can be induced in the PVDF fibers as a result of the polymer jet stretching and electrical poling during electrospinning. Moreover, the incorporation of TrFE monomer into PVDF can stabilize the β-phase without mechanical stretching or electrical poling. The main drawbacks of electrospinning process for making piezoelectric PVDF-based scaffolds are their small pore sizes and the use of highly toxic organic solvents. The small pore sizes prevent the infiltration of bone and neuronal cells into the scaffolds, leading to the formation of a single cell layer on the scaffold surfaces. Accordingly, modified electrospinning methods such as melt-electrospinning and near-field electrospinning have been explored by the researchers to tackle this issue. This article reviews recent development strategies, achievements and major challenges of electrospun PVDF and P(VDF-TrFE) scaffolds for tissue engineering applications.
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Affiliation(s)
- Yuchao Li
- Department of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China.
| | - Chengzhu Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Sie Chin Tjong
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China.
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Kucińska-Lipka J, Lewandowska A, Szarlej P, Łapiński MS, Gubańska I. Degradable poly(ester-ether) urethanes of improved surface calcium deposition developed as novel biomaterials. J BIOACT COMPAT POL 2019. [DOI: 10.1177/0883911519854114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Bones, which are considered as hard tissues, work as scaffold for human body. They provide physical support for muscles and protect intestinal organs. Percentage of hard tissues in human body depends on age, weight, and gender. Human skeleton consists of 206 connected bones. Therefore, it is natural that the hard-tissue damage such as fractures, osteoporosis, and congenital lack of bone may appear. The innovative way of bone healing is an application of so-called tissue scaffolds. There are many synthetic polymers used in this field, but polyurethanes play a great role in this field. It is due to the possibility to control their degradation rate and to tune their surface to improve the calcification process, required for proper bone regeneration. In this article, we described the fabrication of degradable poly(ester-ether)urethane materials, having different hard-segment content (28% or 47%). PEEURs-28HS and PEEURs-47HS materials were obtained by two-step polymerization method and characterized by mechanical properties, ability to undergo oxidative degradation and surface calcification. Performed studies indicated that the PEEURs-28HS material possessed suitable properties to be proposed as a material for possible application in the bone tissue engineering.
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Affiliation(s)
- Justyna Kucińska-Lipka
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology (GUT), Gdansk, Poland
| | - Alicja Lewandowska
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology (GUT), Gdansk, Poland
| | - Paweł Szarlej
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology (GUT), Gdansk, Poland
| | - Marcin Stanisław Łapiński
- Department of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology (GUT), Gdansk, Poland
| | - Iga Gubańska
- Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology (GUT), Gdansk, Poland
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Hodge J, Quint C. The improvement of cell infiltration in an electrospun scaffold with multiple synthetic biodegradable polymers using sacrificial PEO microparticles. J Biomed Mater Res A 2019; 107:1954-1964. [PMID: 31033146 DOI: 10.1002/jbm.a.36706] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 03/03/2019] [Accepted: 03/20/2019] [Indexed: 01/29/2023]
Abstract
Electrospinning is a fabrication technique to generate three dimensional scaffolds with a fiber structure that imitates extracellular matrix for tissue engineering constructs. The versatile characteristics of the electrospinning process yields designer scaffolds made of biodegradable polymers or natural proteins with controllable fiber diameters, biodegradation, and mechanical properties. A limitation of conventional electrospun scaffolds is the dense fiber packing with low porosity that leads to poor cell infiltration. Electrospraying sacrificial polyethylene oxide (PEO) microparticles in combination with electrospun scaffolds are a method to increase porosity. We report the effectiveness of electrospraying PEO microparticles to increase porosity of the most commonly used biodegradable polymers: polyglycolic acid (PGA), poly (lactic-co-glycolic) acid (PLGA), and polycaprolactone (PCL). The biodegradable polymer electrospun scaffolds with the sacrificial PEO microparticles were found to have improved cell proliferation and infiltration with human fibroblasts compared to conventional electrospun scaffolds. The mechanical properties of the more robust PGA and PLGA had minor changes, but the more elastic PCL was observed to be weaker and less stiff after the removal of the PEO microparticles. Therefore, this study found PEO microparticles can increase porosity and cell infiltration with stable mechanical properties for a wide variety of biodegradable polymers in electrospun scaffolds.
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Affiliation(s)
- Jacob Hodge
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas
| | - Clay Quint
- Department of Surgery, University of Kansas Medical Center, Kansas City, Kansas
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Akpan EI, Gbenebor OP, Igogori EA, Aworinde AK, Adeosun SO, Olaleye SA. Electrospun porous bio-fibre mat based on polylactide/natural fibre particles. ARAB JOURNAL OF BASIC AND APPLIED SCIENCES 2019. [DOI: 10.1080/25765299.2019.1607995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Affiliation(s)
- Emmanuel I. Akpan
- Department of Material Science, Institute for Composite Materials Technical University, Kaiserslautern, Germany
| | | | - Ese A. Igogori
- Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria
| | | | - Samson O. Adeosun
- Department of Metallurgical and Materials Engineering, University of Lagos, Lagos, Nigeria
| | - Samuel A. Olaleye
- Department of Mechanical Engineering, University of Lagos, Lagos, Nigeria
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Chong C, Wang Y, Fathi A, Parungao R, Maitz PK, Li Z. Skin wound repair: Results of a pre-clinical study to evaluate electropsun collagen-elastin-PCL scaffolds as dermal substitutes. Burns 2019; 45:1639-1648. [PMID: 31076208 DOI: 10.1016/j.burns.2019.04.014] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 04/11/2019] [Accepted: 04/16/2019] [Indexed: 01/18/2023]
Abstract
The gold standard treatment for severe burn injuries is autologous skin grafting and the use of commercial dermal substitutes. However, resulting skin tissue following treatment usually displays abnormal morphology and functionality including scarring, skin contracture due to the poor elasticity and strength of existing dermal substitutes. In this study, we have developed a triple-polymer scaffold made of collagen-elastin-polycaprolactone (CEP) composite, aiming to enhance the mechanical properties of the scaffold while retaining its biological properties in promoting cell attachment, proliferation and tissue regeneration. The inclusion of elastin was revealed to decrease the stiffness of the scaffold, while also decreasing hysteresis and increasing elasticity. In mice, electrospun collagen-elastin-PCL scaffolds promoted keratinocyte and fibroblast proliferation, tissue integration and accelerated early-stage angiogenesis. Only a mild inflammatory response was observed in the first 2 weeks post-subcutaneous implantation. Our data indicates that the electrospun collagen-elastin-PCL scaffolds could potentially serve as a skin substitute to promote skin cell growth and tissue regeneration after severe burn injury.
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Affiliation(s)
- Cassandra Chong
- Burns Research Group, ANZAC Research Institute, Concord Hospital, University of Sydney, Concord West, NSW 2139, Australia
| | - Yiwei Wang
- Burns Research Group, ANZAC Research Institute, Concord Hospital, University of Sydney, Concord West, NSW 2139, Australia; Disciplines of Surgery, School of Medicine, University of Sydney, NSW 2006, Australia
| | - Ali Fathi
- School of Chemical and Biomolecular Engineering, University of Sydney, NSW 2006, Australia
| | - Roxanne Parungao
- Burns Research Group, ANZAC Research Institute, Concord Hospital, University of Sydney, Concord West, NSW 2139, Australia
| | - Peter K Maitz
- Burns Research Group, ANZAC Research Institute, Concord Hospital, University of Sydney, Concord West, NSW 2139, Australia; Disciplines of Surgery, School of Medicine, University of Sydney, NSW 2006, Australia; Burns and Reconstructive Surgery Unit, Concord Hospital, Concord, NSW 2139, Australia
| | - Zhe Li
- Burns Research Group, ANZAC Research Institute, Concord Hospital, University of Sydney, Concord West, NSW 2139, Australia; Disciplines of Surgery, School of Medicine, University of Sydney, NSW 2006, Australia; Burns and Reconstructive Surgery Unit, Concord Hospital, Concord, NSW 2139, Australia.
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Effect of Electrospun Fiber Mat Thickness and Support Method on Cell Morphology. NANOMATERIALS 2019; 9:nano9040644. [PMID: 31010029 PMCID: PMC6523829 DOI: 10.3390/nano9040644] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 04/03/2019] [Accepted: 04/10/2019] [Indexed: 12/31/2022]
Abstract
Electrospun fiber mats (EFMs) are highly versatile biomaterials used in a myriad of biomedical applications. Whereas some facets of EFMs are well studied and can be highly tuned (e.g., pore size, fiber diameter, etc.), other features are under characterized. For example, although substrate mechanics have been explored by several groups, most studies rely on Young's modulus alone as a characterization variable. The influence of fiber mat thickness and the effect of supports are variables that are often not considered when evaluating cell-mechanical response. To assay the role of these features in EFM scaffold design and to improve understanding of scaffold mechanical properties, we designed EFM scaffolds with varying thickness (50-200 µm) and supporting methodologies. EFM scaffolds were comprised of polycaprolactone and were either electrospun directly onto a support, suspended across an annulus (3 or 10 mm inner diameter), or "tension-released" and then suspended across an annulus. Then, single cell spreading (i.e., Feret diameter) was measured in the presence of these different features. Cells were sensitive to EFM thickness and suspended gap diameter. Overall, cell spreading was greatest for 50 µm thick EFMs suspended over a 3 mm gap, which was the smallest thickness and gap investigated. These results are counterintuitive to conventional understanding in mechanobiology, which suggests that stiffer materials, such as thicker, supported EFMs, should elicit greater cell polarization. Additional experiments with 50 µm thick EFMs on polystyrene and polydimethylsiloxane (PDMS) supports demonstrated that cells can "feel" the support underlying the EFM if it is rigid, similar to previous results in hydrogels. These results also suggest that EFM curvature may play a role in cell response, separate from Young's modulus, possibly because of internal tension generated. These parameters are not often considered in EFM design and could improve scaffold performance and ultimately patient outcomes.
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Han DG, Ahn CB, Lee JH, Hwang Y, Kim JH, Park KY, Lee JW, Son KH. Optimization of Electrospun Poly(caprolactone) Fiber Diameter for Vascular Scaffolds to Maximize Smooth Muscle Cell Infiltration and Phenotype Modulation. Polymers (Basel) 2019; 11:E643. [PMID: 30970611 PMCID: PMC6523610 DOI: 10.3390/polym11040643] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 03/30/2019] [Accepted: 04/04/2019] [Indexed: 12/22/2022] Open
Abstract
Due to the morphological resemblance between the electrospun nanofibers and extracellular matrix (ECM), electrospun fibers have been widely used to fabricate scaffolds for tissue regeneration. Relationships between scaffold morphologies and cells are cell type dependent. In this study, we sought to determine an optimum electrospun fiber diameter for human vascular smooth muscle cell (VSMC) regeneration in vascular scaffolds. Scaffolds were produced using poly(caprolactone) (PCL) electrospun fiber diameters of 0.5, 0.7, 1, 2, 2.5, 5, 7 or 10 μm, and VSMC survivals, proliferations, infiltrations, and phenotypes were recorded after culturing cells on these scaffolds for one, four, seven, or 10 days. VSMC phenotypes and macrophage infiltrations into scaffolds were evaluated by implanting scaffolds subcutaneously in a mouse for seven, 14, or 28 days. We found that human VSMC survival was not dependent on the electrospun fiber diameter. In summary, increasing fiber diameter reduced VSMC proliferation, increased VSMC infiltration and increased macrophage infiltration and activation. Our results indicate that electrospun PCL fiber diameters of 7 or 10 µm are optimum in terms of VSMC infiltration and macrophage infiltration and activation, albeit at the expense of VSMC proliferation.
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Affiliation(s)
- Dae Geun Han
- Department of Health Sciences and Technology, GAIHST, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
| | - Chi Bum Ahn
- Department of Molecular Medicine, College of Medicine, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
| | - Ji-Hyun Lee
- Department of Molecular Medicine, College of Medicine, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
| | - Yongsung Hwang
- Soonchunhyang Institute of Medi-bio Science, Soonchunhyang University, Cheonan-si 31151, Korea.
| | - Joo Hyun Kim
- Department of Health Sciences and Technology, GAIHST, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
| | - Kook Yang Park
- Department of Thoracic and Cardiovascular Surgery, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774 Beon-gil, Namdong-gu, Incheon 21565, Korea.
| | - Jin Woo Lee
- Department of Health Sciences and Technology, GAIHST, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
- Department of Molecular Medicine, College of Medicine, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
| | - Kuk Hui Son
- Department of Health Sciences and Technology, GAIHST, Gachon University, 155 Gaetbeol-ro, Yeonsu-ku, Incheon 21999, Korea.
- Department of Thoracic and Cardiovascular Surgery, Gil Medical Center, Gachon University College of Medicine, 21, Namdong-daero 774 Beon-gil, Namdong-gu, Incheon 21565, Korea.
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Suresh S, Gryshkov O, Glasmacher B. Impact of setup orientation on blend electrospinning of poly-ε-caprolactone-gelatin scaffolds for vascular tissue engineering. Int J Artif Organs 2018; 41:801-810. [DOI: 10.1177/0391398818803478] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Introduction: This article explores the effect of horizontal and vertical setups on blend electrospinning with two polymers having vastly different properties – poly-ε-caprolactone and gelatin, and subsequent effect of the resulting microstructure on viability of seeded cells. Methods: Poly-ε-caprolactone and gelatin of varying blend concentrations were electrospun in horizontal and vertical setup orientations. NIH 3T3 fibroblasts were seeded on these scaffolds to assess cell viability changes in accordance with change in microstructure. Results: Blend electrospinning yielded a heterogeneous microstructure in the vertical orientation beyond a critical concentration of gelatin, and a homogeneous microstructure in the horizontal orientation. Unblended poly-ε-caprolactone electrospinning showed no significant difference in fibre diameter or pore size in either orientation. Mechanical testing showed reduced elasticity when poly-ε-caprolactone is blended with gelatin but an overall increase in tensile strength in the vertically spun samples. Cells on vertically spun samples showed significantly higher viabilities by day 7. Discussion: The composite microstructure obtained in vertically spun poly-ε-caprolactone -gelatin blends has a positive effect on viability of seeded cells. Such scaffolds can be considered suitable candidates for cardiovascular tissue engineering where cell infiltration is crucial.
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Affiliation(s)
- Sinduja Suresh
- Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
| | - Oleksandr Gryshkov
- Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
| | - Birgit Glasmacher
- Institute for Multiphase Processes, Leibniz University Hannover, Hannover, Germany
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75
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Lee J, Kim G. Three-Dimensional Hierarchical Nanofibrous Collagen Scaffold Fabricated Using Fibrillated Collagen and Pluronic F-127 for Regenerating Bone Tissue. ACS APPLIED MATERIALS & INTERFACES 2018; 10:35801-35811. [PMID: 30260631 DOI: 10.1021/acsami.8b14088] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
It is well known that a nanoscale fibrous structure can provide a unique stage for encouraging reasonable cell activities including attachment and proliferation owing to its similar topological structure to the extracellular matrix. Hence, the structure has been widely applied in tissue regeneration. Type-I collagen has been typically used as a typical tissue regenerative material owing to its biocompatibility and abundance, although it has potential for antigenicity. In particular, collagen has been fabricated in two different forms, porous spongy and nanofibers. However, although the structures provided outstanding cellular activities, they exhibit disadvantages such as low cell migration capabilities in a spongy scaffold owing to the low degree of interconnected macropores and low processability in fabricating three-dimensional (3D) structures in an electrospun collagen scaffold. Hence, the fabrication of 3D nanofibrous collagen structures with interconnected macropores can be extremely challenging. In this work, we developed a 3D collagen scaffold consisting of multilayered nanofibrous struts fabricated using a 3D printing process and pluronic F-127 (PF-127), which is a thermoreversible polymer. After optimizing various processing conditions, we successfully achieved the 3D nanofibrous collagen mesh structure with fully interconnected macropores. A 3D-printed collagen scaffold that was fabricated using a low-temperature printing process was applied as a control. Through various analyses using physical properties (surface morphology, fibronectin absorption, mechanical properties, etc.) and cell activities using preosteoblasts (MC3T3-E1), we are convinced that the newly designed 3D nanofibrous collagen scaffold can be a new promising scaffold for bone tissue engineering.
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Affiliation(s)
- JiUn Lee
- Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering , Sungkyunkwan University , Suwon 16419 , South Korea
| | - GeunHyung Kim
- Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering , Sungkyunkwan University , Suwon 16419 , South Korea
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Kalakodio L, Bakayoko M, Kalagodio A, Abo BO, Muhoza JP, Ismaila EM. Progress on the amendment in biochars and its effects on the soil-plant-micro-organism-biochar system. REVIEWS ON ENVIRONMENTAL HEALTH 2018; 33:281-293. [PMID: 29897887 DOI: 10.1515/reveh-2018-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/06/2018] [Indexed: 06/08/2023]
Abstract
Abstract
Biochar, coal produced by pyrolysis and used as an amendment, has several advantages and has proven to be a promising avenue for sustainable agriculture. However, the current manufacturing methods, the conditions of pyrolysis and the biomasses used produce biochars of very variable qualities which can differently affect the productivity of the ground and the outputs of plants. Currently, no study makes it possible to elucidate the influence of the physicochemical properties of the biochars on the structure and the microbial diversity of the soil. The aim of this review was to understand how the physicochemical properties of a biochar affect its capacity: to reduce the emissions of greenhouse gases; to improve the growth of hothouse plants; to improve the effectiveness of the use of manures and water; and to modify the structure and the diversity of the bacterial communities in a horticultural substrate and a mineral soil. These biochars were produced under various conditions. The analyses show that the addition of biochar can stimulate certain groups of bacteria involved in carbon and nitrogen cycles and possibly those involved in the development of plants. This review identifies the important physicochemical properties of the biochars, which will be able to better guide agricultural producers and industries manufacturing substrates containing peat, in the choice of a biochar favorable to the growth of plants and a more durable agriculture.
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Affiliation(s)
- Loissi Kalakodio
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Xueyuan 30, Beijing 100083, P.R. China
| | - Moussa Bakayoko
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Adiara Kalagodio
- School of Natural Science, Wuhan University Technology, Wuhan, Hubei, China
| | - Bodjui Olivier Abo
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - Jean Pierre Muhoza
- University of Science and Technology, School of Energy and Environmental Engineering, Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, Beijing, P.R. China
| | - El Moctar Ismaila
- Beijing Institute of Technology, Energy of Environment Materials, Beijing, China
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Timnak A, Gerstenhaber JA, Dong K, Har-El YE, Lelkes PI. Gradient porous fibrous scaffolds: a novel approach to improving cell penetration in electrospun scaffolds. ACTA ACUST UNITED AC 2018; 13:065010. [PMID: 30129563 DOI: 10.1088/1748-605x/aadbbe] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Electrospinning is an increasingly popular technique to generate 3D fibrous tissue scaffolds that mimic the submicron sized fibers of extracellular matrices. A major drawback of electrospun scaffolds is the small interfibrillar pore size, which normally prevents cellular penetration in between fibers. In this study, we introduced a novel process, based on electrospinning, to manufacture a unique gradient porous fibrous (GPF) scaffold from soy protein isolate (SPI). The pore sizes in the GPF scaffolds gradually increase from one side of the scaffold to the other, ranging from 7.8 ± 2.5 μm in the small pore side, 21.4 ± 10.3 μm in the mid layer to 58.0 ± 23.6 μm in the large pore side. The smallest pores of the GPF scaffolds appeared to be somewhat larger than those in conventionally electrospun SPI scaffolds (4.2 ± 1.3 μm). Hydrated GPF scaffolds exhibited J-shaped stress-strain curves, reminiscent of those for soft biological scaffolds. Attachment, spreading, and proliferation of human dermal fibroblasts (HDFB) were supported on both the small and the large pore sides of the GPF scaffolds. Cultured HDFB and murine RAW 264.7 macrophages penetrated significantly deeper (98.7 ± 24.2 μm and 53.3 ± 9.6 μm, respectively) into the larger pores than when seeded onto the small pore side of GPF scaffolds (22.8 ± 6.2 μm and 25.7 ± 7.3 μm) and control SPI scaffolds. (11.3 ± 3.8 μm and 15.3 ± 3.1 μm). This study introduces a novel fabrication technique, which, by convergence of several biofabrication technologies, produces scaffolds with enhanced cellular penetration.
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78
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Kim HY, Park JH, Byun JH, Lee JH, Oh SH. BMP-2-Immobilized Porous Matrix with Leaf-Stacked Structure as a Bioactive GBR Membrane. ACS APPLIED MATERIALS & INTERFACES 2018; 10:30115-30124. [PMID: 30130399 DOI: 10.1021/acsami.8b09558] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We developed an asymmetrically porous membrane with a leaf-stacked structure (LSS membrane; top with nanosized pores and bulk/bottom with leaf-stacked structure) via immersion-precipitation using polycarprolactone (PCL)/Pluronic F127 mixture solution (in tetraglycol). The bone morphogenetic protein-2 (BMP-2) is immobilized on the pore surfaces of the LSS membrane by immersing the membrane in the BMP-2 solution. The BMP-2 loaded in the LSS membrane is continuously released for 38 days (without additional modifications of the matrix) to improve osteogenic differentiation of cells and new bone formation (carvarial defect rat model). The leaf-stacked structure is recognized to be a physical stimulus for bone regeneration, and the stimulation effect is comparable to that of continuously released BMP-2. Moreover, we observe the combined effect of BMP-2 and the leaf-stacked structure for bone healing. Thus, we suggest that the BMP-2-immobilized LSS membrane may be a candidate as a bioactive guided bone regeneration (GBR) membrane for clinical applications, due to the use of clinically acceptable biomaterials and fabrication procedures as well as effective osteogenic differentiation and bone regeneration.
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Affiliation(s)
- Ho Yong Kim
- Department of Nanobiomedical Science , Dankook University , Cheonan 31116 , Republic of Korea
| | - Jin Hyun Park
- Department of Nanobiomedical Science , Dankook University , Cheonan 31116 , Republic of Korea
| | - June-Ho Byun
- Department of Oral and Maxillofacial Surgery , Gyeongsang National University School of Medicine and Gyeongsang National University Hospital, Institute of Health Sciences, Gyeongsang National University , Jinju 52828 , Republic of Korea
| | - Jin Ho Lee
- Department of Advanced Materials and Chemical Engineering , Hannam University , Daejeon 34054 , Republic of Korea
| | - Se Heang Oh
- Department of Nanobiomedical Science , Dankook University , Cheonan 31116 , Republic of Korea
- Department of Pharmaceutical Engineering , Dankook University , Cheonan 31116 , Republic of Korea
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Bridging Repair of Large Rotator Cuff Tears Using a Multilayer Decellularized Tendon Slices Graft in a Rabbit Model. Arthroscopy 2018; 34:2569-2578. [PMID: 30078689 DOI: 10.1016/j.arthro.2018.04.019] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 04/16/2018] [Accepted: 04/24/2018] [Indexed: 02/02/2023]
Abstract
PURPOSE The purpose of this study was to evaluate the efficacy of an extracellular matrix scaffold with multilayer decellularized tendon slices (MDTSs) for reconstructing large rotator cuff tears in a rabbit model. METHODS Large defects in the infraspinatus tendons were created bilaterally in 36 rabbits. The graft group underwent bridging repair of the defects with the MDTSs grafts from Achilles tendons of adult beagle dogs, and the control group underwent repair with the autologous excised tendon. Specimens underwent histologic observation, biomechanical testing, and microcomputed tomography analysis at 2, 4, and 8 weeks after surgery. RESULTS Histologic analysis confirmed that the MDTSs graft promoted cell ingrowth and tissue integration, and fibrocartilage and Sharpey fibers formed at the enthesis at 8 weeks. Accordingly, the MDTSs graft generated a histologic appearance similar to that of the autogenous tendon graft. Mechanical testing revealed a significant increase of the regenerated tendons in ultimate load and stiffness from 4 to 8 weeks postoperatively, which was similar to autologous tendon repair. Microcomputed tomography analysis demonstrated that the MDTSs graft promoted bone formation at the tendon-bone insertion, thus improving the mechanical properties of the repair tendon. CONCLUSIONS The MDTSs graft used to bridge large rotator cuff defects in a rabbit model promoted host cell ingrowth, enhanced the remodeling of regenerated tendon, and promoted fibrocartilage formation, thus improving the biomechanical properties of the repaired tendon. This study thereby provides fundamental information for rotator cuff regeneration with the MDTSs graft. CLINICAL RELEVANCE Rotator cuff regeneration using MDTSs grafts is a promising procedure for large rotator cuff tears.
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Labeling of endothelial cells with magnetic microbeads by angiophagy. Biotechnol Lett 2018; 40:1189-1200. [PMID: 29876793 DOI: 10.1007/s10529-018-2581-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 05/28/2018] [Indexed: 10/14/2022]
Abstract
OBJECTIVES Attachment of magnetic particles to cells is needed for a variety of applications but is not always possible or efficient. Simpler and more convenient methods are thus desirable. In this study, we tested the hypothesis that endothelial cells (EC) can be loaded with micron-size magnetic beads by the phagocytosis-like mechanism 'angiophagy'. To this end, human umbilical vein EC (HUVEC) were incubated with magnetic beads conjugated or not (control) with an anti-VEGF receptor 2 antibody, either in suspension, or in culture followed by re-suspension using trypsinization. RESULTS In all conditions tested, HUVEC incubation with beads induced their uptake by angiophagy, which was confirmed by (i) increased cell granularity assessed by flow cytometry, and (ii) the presence of an F-actin rich layer around many of the intracellular beads, visualized by confocal microscopy. For confluent cultures, the average number of beads per cell was 4.4 and 4.2, with and without the presence of the anti-VEGFR2 antibody, respectively. However, while the actively dividing cells took up 2.9 unconjugated beads on average, this number increased to 5.2 if binding was mediated by the antibody. Magnetic pulldown increased the cell density of beads-loaded cells in porous electrospun poly-capro-lactone scaffolds by a factor of 4.5 after 5 min, as compared to gravitational settling (p < 0.0001). CONCLUSION We demonstrated that EC can be readily loaded by angiophagy with micron-sized beads while attached in monolayer culture, then dispersed in single-cell suspensions for pulldown in porous scaffolds and for other applications.
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81
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Sekar MP, Roopmani P, Krishnan UM. Development of a novel porous polyvinyl formal (PVF) microfibrous scaffold for nerve tissue engineering. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.03.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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82
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Das S, Gurav S, Soni V, Ingle A, Mohanty BS, Chaudhari P, Bendale K, Dholam K, Bellare JR. Osteogenic Nanofibrous Coated Titanium Implant Results in Enhanced Osseointegration: In Vivo Preliminary Study in a Rabbit Model. Tissue Eng Regen Med 2018; 15:231-247. [PMID: 30603550 PMCID: PMC6171690 DOI: 10.1007/s13770-017-0106-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/21/2017] [Accepted: 11/28/2017] [Indexed: 01/09/2023] Open
Abstract
A titanium implant surface when coated with biodegradable, highly porous, osteogenic nanofibrous coating has shown enhanced intrinsic osteoinductive and osteoconductive properties. This coating mimics extracellular matrix resulting in differentiation of stem cells present in the peri-implant niche to osteoblast and hence results in enhanced osseointegration of the implant. The osteogenic nanofibrous coating (ONFC) consists of poly-caprolactone, gelatin, nano-sized hydroxyapatite, dexamethasone, ascorbic acid and beta-glycerophosphate. ONFC exhibits optimum mechanical properties to support mesenchymal stem cells and steer their osteogenic differentiation. ONFC was subjected to various characterization tests like scanning electron microscopy, Fourier-transform infrared spectroscopy, x-ray diffractometry, thermal degradation, biomineralization, mechanical properties, wettability and proliferation assay. In pre-clinical animal trials, the coated implant showed enhanced new bone formation when placed in the tibia of rabbit. This novel approach toward implant bone integration holds significant promise for its easy and economical coating thus marking the beginning of new era of electrospun osteogenic nanofibrous coated bone implants.
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Affiliation(s)
- Siddhartha Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076 India
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076 India
| | | | - Vivek Soni
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076 India
| | - Arvind Ingle
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410210 India
| | - Bhabani S. Mohanty
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410210 India
| | - Pradip Chaudhari
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410210 India
| | - Kiran Bendale
- Advanced Centre for Treatment, Research and Education in Cancer, Navi Mumbai, 410210 India
| | | | - Jayesh R. Bellare
- Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai, 400076 India
- Wadhwani Research Centre for Bioengineering, Indian Institute of Technology Bombay, Mumbai, 400076 India
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83
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Ma J, He Y, Liu X, Chen W, Wang A, Lin CY, Mo X, Ye X. A novel electrospun-aligned nanoyarn/three-dimensional porous nanofibrous hybrid scaffold for annulus fibrosus tissue engineering. Int J Nanomedicine 2018; 13:1553-1567. [PMID: 29588584 PMCID: PMC5858820 DOI: 10.2147/ijn.s143990] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Introduction Herniation of the nucleus pulposus (NP) because of defects in the annulus fibrosus (AF) is a well-known cause of low back pain. Defects in the AF thus remain a surgical challenge, and efforts have been made to develop new techniques for closure and repair. In this study, we developed an electrospun aligned nanoyarn scaffold (AYS) and nanoyarn/three-dimensional porous nanofibrous hybrid scaffold (HS) for AF tissue engineering. Methods The AYS was fabricated via conjugated electrospinning, while the aligned nanofibrous scaffold (AFS) was prepared by traditional electrospinning as a baseline scaffold. The HS was constructed by freeze-drying and cross-linking methods. Scanning electron microscopy and mechanical measurement were used to characterize the properties of these scaffolds. Bone marrow derived mesenchymal stem cells (BMSCs) were seeded on scaffolds, and cell proliferation was determined by CCK-8 assay, while cell infiltration and differentiation were assessed by histological measurement and quantitative real-time polymerase chain reaction, respectively. Results Morphological measurements showed that AYS presented a relatively better three-dimensional structure with larger pore sizes, higher porosity, and better fibers’ alignment compared to AFS. Mechanical testing demonstrated that the tensile property of AFS and AYS was qualitatively similar to the native AF tissue, albeit to a lesser extent. When BMSCs were seeded and cultured on these scaffolds, the number of cells cultured on HS and AYS was found to be significantly higher than that on AFS and culture plate after 7 days of culture (P<0.05). In addition, cell infiltration was significantly higher in HS when compared with AFS and AYS (P<0.05). A part of BMSCs ingressed into the inner part of AYS upon long-term in vitro culture. No significant difference was observed between AFS and AYS in terms of the median infiltration depth (P>0.05). BMSCs seeded on AYS demonstrated an increased expression of COL1A1, while the expression levels of SOX-9, COL2A1, and Aggrecan were higher in HS compared to other scaffolds (P<0.05). Conclusion These findings indicate that HS makes a proper scaffold for the AF tissue engineering as it replicates the axial compression and tensile property of AF, thereby providing a better platform for cell infiltration and cell–scaffold interaction.
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Affiliation(s)
- Jun Ma
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai
| | - Yunfei He
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai.,Department of Spinal Surgery, Lanzhou General Hospital of Lanzhou Military Command Region, Lanzhou
| | - Xilin Liu
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai
| | - Weiming Chen
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University
| | - An Wang
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai.,Department of Orthopaedics, Shanghai Armed Police Force Hospital, Shanghai, China
| | - Chia-Ying Lin
- Structural Tissue Evaluation and Engineering Laboratories, Department of Biomedical Engineering.,Department of Orthopaedic Surgery, University of Cincinnati, Cincinnati, OH, USA
| | - Xiumei Mo
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University
| | - Xiaojian Ye
- Department of Orthopaedics, Changzheng Hospital, Second Military Medical University, Shanghai
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84
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Goonoo N. Vascularization and angiogenesis in electrospun tissue engineered constructs: towards the creation of long-term functional networks. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aaab03] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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85
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Jiang J, Chen S, Wang H, Carlson MA, Gombart AF, Xie J. CO 2-expanded nanofiber scaffolds maintain activity of encapsulated bioactive materials and promote cellular infiltration and positive host response. Acta Biomater 2018; 68:237-248. [PMID: 29269334 PMCID: PMC5803415 DOI: 10.1016/j.actbio.2017.12.018] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Revised: 12/13/2017] [Accepted: 12/14/2017] [Indexed: 12/21/2022]
Abstract
Traditional electrospun nanofiber membranes were incapable of promoting cellular infiltration due to its intrinsic property (e.g., dense structure and small pore size) limiting their use in tissue regeneration. Herein, we report a simple and novel approach for expanding traditional nanofiber membranes from two-dimensional to three-dimensional (3D) with controlled thickness and porosity via depressurization of subcritical CO2 fluid. The expanded 3D nanofiber scaffolds formed layered structures and simultaneously maintained the aligned nanotopographic cues. The 3D scaffolds also retained the fluorescent intensity of encapsulated coumarin 6 and the antibacterial activity of encapsulated antimicrobial peptide LL-37. In addition, the expanded 3D nanofiber scaffolds with arrayed holes can significantly promote cellular infiltration and neotissue formation after subcutaneous implantation compared to traditional nanofiber membranes. Such scaffolds also significantly increased the blood vessel formation and the ratio of M2/M1 macrophages after subcutaneous implantation for 2 and 4 weeks compared to traditional nanofiber membranes. Together, the presented method holds great potential in the fabrication of functional 3D nanofiber scaffolds for various applications including engineering 3D in vitro tissue models, antimicrobial wound dressing, and repairing/regenerating tissues in vivo. STATEMENT OF SIGNIFICANCE Electrospun nanofibers have been widely used in regenerative medicine due to its biomimicry property. However, most of studies are limited to the use of 2D electrospun nanofiber membranes. To the best of our knowledge, this article is the first instance of the transformation of traditional electrospun nanofiber membranes from 2D to 3D via depressurization of subcritical CO2 fluid. This method eliminates many issues associated with previous approaches such as necessitating the use of aqueous solutions and chemical reactions, multiple-step process, loss of the activity of encapsulated biological molecules, and unable to expand electrospun nanofiber mats made of hydrophilic polymers. Results indicate that these CO2 expanded nanofiber scaffolds can maintain the activity of encapsulated biological molecules. Further, the CO2 expanded nanofiber scaffolds with arrayed holes can greatly promote cellular infiltration, neovascularization, and positive host response after subcutaneous implantation in rats. The current work is the first study elucidating such a simple and novel strategy for fabrication of 3D nanofiber scaffolds.
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Affiliation(s)
- Jiang Jiang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Shixuan Chen
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Hongjun Wang
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, United States
| | - Mark A Carlson
- Departments of Surgery and Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198, United States; Department of Surgery, VA Nebraska-Western Iowa Health Care System, Omaha, NE 68105, United States
| | - Adrian F Gombart
- Linus Pauling Institute, Oregon State University, Corvallis, OR 97331, United States; Department of Biochemistry and Biophysics, Oregon State University, Corvallis, OR 97331, United States
| | - Jingwei Xie
- Department of Surgery-Transplant and Mary & Dick Holland Regenerative Medicine Program, University of Nebraska Medical Center, Omaha, NE 68198, United States.
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Bowers DT, Olingy CE, Chhabra P, Langman L, Merrill PH, Linhart RS, Tanes ML, Lin D, Brayman KL, Botchwey EA. An engineered macroencapsulation membrane releasing FTY720 to precondition pancreatic islet transplantation. J Biomed Mater Res B Appl Biomater 2018; 106:555-568. [PMID: 28240814 PMCID: PMC5572559 DOI: 10.1002/jbm.b.33862] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Revised: 12/28/2016] [Accepted: 01/26/2017] [Indexed: 02/06/2023]
Abstract
Macroencapsulation is a powerful approach to increase the efficiency of extrahepatic pancreatic islet transplant. FTY720, a small molecule that activates signaling through sphingosine-1-phosphate receptors, is immunomodulatory and pro-angiogenic upon sustained delivery from biomaterials. While FTY720 (fingolimod, Gilenya) has been explored for organ transplantation, in the present work the effect of locally released FTY720 from novel nanofiber-based macroencapsulation membranes is explored for islet transplantation. We screened islet viability during culture with FTY720 and various biodegradable polymers. Islet viability is significantly reduced by the addition of high doses (≥500 ng/mL) of soluble FTY720. Among the polymers screened, islets have the highest viability when cultured with poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV). Therefore, PHBV was blended with polycaprolactone (PCL) for mechanical stability and electrospun into nanofibers. Islets had no detectable function ex vivo following 5 days or 12 h of subcutaneous implantation within our engineered device. Subsequently, we explored a preconditioning scheme in which islets are transplanted 2 weeks after FTY720-loaded nanofibers are implanted. This allows FTY720 to orchestrate a local regenerative milieu while preventing premature transplantation into avascular sites that contain high concentrations of FTY720. These results provide a foundation and motivation for further investigation into the use of FTY720 in preconditioning sites for efficacious islet transplantation. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 555-568, 2018.
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Affiliation(s)
- Daniel T Bowers
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
| | - Claire E Olingy
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332-0363
| | - Preeti Chhabra
- Department of Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Linda Langman
- Department of Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Parker H Merrill
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
| | - Ritu S Linhart
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
| | - Michael L Tanes
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
| | - Dan Lin
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
| | - Kenneth L Brayman
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
- Department of Surgery, University of Virginia, Charlottesville, Virginia, 22903
| | - Edward A Botchwey
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia, 22903
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332-0363
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LAKTAS JACOBM, GROWNEY KALAF EMILYA, SELL SCOTTA, MCQUILLING MARKW. THE USE OF COMPUTATIONAL FLUID DYNAMICS IN THE OPTIMIZATION OF AIR-IMPEDANCE ELECTROSPUN STRUCTURES FOR TISSUE ENGINEERING. J MECH MED BIOL 2018. [DOI: 10.1142/s0219519418500094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Electrospinning is a viable method for dermal tissue engineering scaffold fabrication. Grafts using air-impedance electrospinning possess the ability to significantly increase cellular infiltration. However, current air-impedance methods lack precise control over flow properties through the collecting mandrel and are unable to accurately control fiber deposition in an organized and well-distributed manner. This study focusses on the use of computational fluid dynamics (CFD) and its application to air-impedance structures to optimize the deposition of the resulting dermal graft. Air-impedance structures were created from a range of air pressures to determine the optimal pressure for fiber collection. Initial results showed a pressure of 11[Formula: see text]psi (1.3[Formula: see text]scfm), which led to increased cellular penetration, but created uneven structures. This inlet flow rate was implemented as the primary boundary condition for CFD simulations. CFD software was used to gather data on fluid flow characteristics for a variety of mandrel geometries. Results showed that a mandrel with increased length and offset pore geometry provided the highest uniformity of flow along the length of the model over the other mandrel lengths, geometries, and pore alignments based largely on pressure and velocity analysis. This mandrel was manufactured and used for validation of CFD data via scaffold analysis and cellular infiltration studies. Scaffold characterization confirmed a significant advantage in the creation of structures fabricated with the optimized air-impedance mandrel by effectively doubling the efficiency of production via larger usable scaffold area. The results indicate that CFD validation is a valuable technique to optimize air impedance scaffolds in silico and has proven to be a useful tool in the fabrication of tissue engineering scaffolds.
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Affiliation(s)
- JACOB M. LAKTAS
- Department of Biomedical Engineering, Saint Louis University, St Louis, MO 63103, USA
| | | | - SCOTT A. SELL
- Department of Biomedical Engineering, Saint Louis University, St Louis, MO 63103, USA
| | - MARK W. MCQUILLING
- Department of Aerospace and Mechanical Engineering, Saint Louis University, St Louis, MO 63103, USA
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88
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Brunelle AR, Horner CB, Low K, Ico G, Nam J. Electrospun thermosensitive hydrogel scaffold for enhanced chondrogenesis of human mesenchymal stem cells. Acta Biomater 2018; 66:166-176. [PMID: 29128540 DOI: 10.1016/j.actbio.2017.11.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 10/26/2017] [Accepted: 11/07/2017] [Indexed: 12/26/2022]
Abstract
Hydrogels have shown great potential for cartilage tissue engineering applications due to their capability to encapsulate cells within biomimetic, 3-dimensional (3D) microenvironments. However, the multi-step fabrication process that is necessary to produce cell/scaffold constructs with defined dimensions, limits their off-the-shelf translational usage. In this study, we have developed a hybrid scaffolding system which combines a thermosensitive hydrogel, poly(ethylene glycol)-poly(N-isopropylacrylamide) (PEG-PNIPAAm), with a biodegradable polymer, poly(ε-caprolactone) (PCL), into a composite, electrospun microfibrous structure. A judicious optimization of material composition and electrospinning process produced a structurally self-supporting hybrid scaffold. The reverse thermosensitivity of PEG-PNIPAAm allowed its dissolution/hydration upon cell seeding within a network of PCL microfibers while maintaining the overall scaffold shape at room temperature. A subsequent temperature elevation to 37 °C induced the hydrogel's phase transition to a gel state, effectively encapsulating cells in a 3D hydrogel without the use of a mold. We demonstrated that the hybrid scaffold enhanced chondrogenic differentiation of human mesenchymal stem cells (hMSCs) based on chondrocytic gene and protein expression, which resulted in superior viscoelastic properties of the cell/scaffold constructs. The hybrid scaffold enables a facile, single-step cell seeding process to inoculate cells within a 3D hydrogel with the potential for cartilage tissue engineering. STATEMENT OF SIGNIFICANCE Hydrogels have demonstrated the excellent ability to enhance chondrogenesis of stem cells due to their hydrated fibrous nanostructure providing a cellular environment similar to native cartilage. However, the necessity for multi-step processes, including mixing of hydrogel precursor with cells and subsequent gelation in a mold to form a defined shape, limits their off-the-shelf usage. In this study, we developed a hybrid scaffold by combining a thermosensitive hydrogel with a mechanically stable polymer, which provides a facile means to inoculate cells in a 3D hydrogel with a mold-less, single step cell seeding process. We further showed that the hybrid scaffold enhanced chondrogenesis of mesenchymal stem cells, demonstrating its potential for cartilage tissue engineering.
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89
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Li H, Huang C, Jin X, Ke Q. An electrospun poly(ε-caprolactone) nanocomposite fibrous mat with a high content of hydroxyapatite to promote cell infiltration. RSC Adv 2018; 8:25228-25235. [PMID: 35547952 PMCID: PMC9087819 DOI: 10.1039/c8ra02059k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 06/05/2018] [Indexed: 11/21/2022] Open
Abstract
Electrospun polymer/inorganic biomimetic nanocomposite scaffolds have emerged for use in a new strategy for bone regeneration. In this study, a poly(ε-caprolactone) (PCL)/hydroxyapatite (HAp) nanocomposite mat with a HAp content as high as 60% was prepared via one-step electrospinning using trifluoroethanol as the solvent, and it has superior dispersibility and spinnability. The structure and physicochemical properties of the scaffolds were studied using scanning electron microscopy and spectroscopic techniques. X-ray diffraction and Fourier transformed infrared spectroscopy confirmed the presence of HAp in the composite PCL fibers. The results of cell culturing suggested that the incorporation of HAp with PCL could regulate the cytoskeleton and the differentiation of cells. More interestingly, the high content of HAp was also found to be conducive to the infiltration of MC-3T3 cells into the mat. The results indicated the potential of PCL/HAp scaffolds as a promising substitute for bone regeneration. PCL nanofibers with 60% HAp content were fabricated, and the presence of HAp regulated cell morphology to enhance cell infiltration.![]()
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Affiliation(s)
- Haoxuan Li
- Key Laboratory of Textile Science & Technology
- College of Textiles
- Donghua University
- Shanghai 201620
- P. R. China
| | - Chen Huang
- Key Laboratory of Textile Science & Technology
- College of Textiles
- Donghua University
- Shanghai 201620
- P. R. China
| | - Xiangyu Jin
- Key Laboratory of Textile Science & Technology
- College of Textiles
- Donghua University
- Shanghai 201620
- P. R. China
| | - Qinfei Ke
- Key Laboratory of Textile Science & Technology
- College of Textiles
- Donghua University
- Shanghai 201620
- P. R. China
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Designing a tissue-engineered tracheal scaffold for preclinical evaluation. Int J Pediatr Otorhinolaryngol 2018; 104:155-160. [PMID: 29287858 PMCID: PMC5922759 DOI: 10.1016/j.ijporl.2017.10.036] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/22/2017] [Accepted: 10/23/2017] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Recent efforts to tissue engineer long-segment tracheal grafts have been complicated by stenosis and malacia. It has been proposed that both the mechanical characteristics and cell seeding capacity of TETG scaffolds are integral to graft performance. Our aim was to design a tracheal construct that approximates the biomechanical properties of native sheep trachea and optimizes seeding with bone marrow derived mononuclear cells prior to preclinical evaluation in an ovine model. METHODS A solution of 8% polyethylene terephthalate (PET) and 3% polyurethane (PU) was prepared at a ratio of either 8:2 or 2:8 and electrospun onto a custom stainless steel mandrel designed to match the dimensional measurements of the juvenile sheep trachea. 3D-printed porous or solid polycarbonate C-shaped rings were embedded within the scaffolds during electrospinning. The scaffolds underwent compression testing in the anterior-posterior and lateral-medial axes and the biomechanical profiles compared to that of a juvenile ovine trachea. The most biomimetic constructs then underwent vacuum seeding with ovine bone marrow derived mononuclear cells. Fluorometric DNA assay was used to quantify scaffold seeding. RESULTS Both porous and solid rings approximated the biomechanics of the native ovine trachea, but the porous rings were most biomimetic. The load-displacement curve of scaffolds fabricated from a ratio of 2:8 PET:PU most closely mimicked that of native trachea in the anterior-posterior and medial-lateral axes. Solid C-ringed scaffolds had a greater cell seeding efficiency when compared to porous ringed scaffolds (Solid: 19 × 104 vs. Porous: 9.6 × 104 cells/mm3, p = 0.0098). CONCLUSION A long segment tracheal graft composed of 2:8 PET:PU with solid C-rings approximates the biomechanics of the native ovine trachea and demonstrates superior cell seeding capacity of the two prototypes tested. Further preclinical studies using this graft design in vivo would inform the rational design of an optimal TETG scaffold.
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91
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Young BM, Shankar K, Allen BP, Pouliot RA, Schneck MB, Mikhaiel NS, Heise RL. Electrospun Decellularized Lung Matrix Scaffold for Airway Smooth Muscle Culture. ACS Biomater Sci Eng 2017; 3:3480-3492. [DOI: 10.1021/acsbiomaterials.7b00384] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Bethany M. Young
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Keerthana Shankar
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Brittany P. Allen
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Robert A. Pouliot
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Matthew B. Schneck
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Nabil S. Mikhaiel
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
| | - Rebecca L. Heise
- Department
of Biomedical Engineering, Virginia Commonwealth University, 800 E. Leigh
Street, Room 1071, Richmond, Virginia 23219, United States
- Department
of Physiology and Biophysics, Virginia Commonwealth University School of Medicine, 1101 East Marshall Street, Richmond, Virginia 23298, United States
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Pal P, Srivas PK, Dadhich P, Das B, Maulik D, Dhara S. Nano-/Microfibrous Cotton-Wool-Like 3D Scaffold with Core–Shell Architecture by Emulsion Electrospinning for Skin Tissue Regeneration. ACS Biomater Sci Eng 2017; 3:3563-3575. [DOI: 10.1021/acsbiomaterials.7b00681] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Pallabi Pal
- Biomaterials
and Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
| | - Pavan Kumar Srivas
- Biomaterials
and Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
| | - Prabhash Dadhich
- Biomaterials
and Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
| | - Bodhisatwa Das
- Biomaterials
and Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
| | - Dhrubajyoti Maulik
- Department
of Surgery, Bankura Sammilani Medical College, Bankura, India
| | - Santanu Dhara
- Biomaterials
and Tissue Engineering Laboratory, School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
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Vashaghian M, Zaat SJ, Smit TH, Roovers JP. Biomimetic implants for pelvic floor repair. Neurourol Urodyn 2017; 37:566-580. [PMID: 28799675 DOI: 10.1002/nau.23367] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/15/2017] [Indexed: 12/15/2022]
Abstract
BACKGROUND Polypropylene implants are used for the reconstructive surgery of urogynaecological disorders like pelvic organ prolapse, but severe complications associated with their use have been reported. There is evidence that surface properties and a difference in mechanical stiffness between the implant and the host tissue contribute to these adverse events. Electrospinning is an innovative engineering alternative that provides a biomimetic microstructure for implants, resulting in a different mechano-biological performance. AIM The main objective of this review is to inform about the potential of electrospun matrices as an alternative modality for pelvic floor repair. METHODS Publications with the following studies of electrospun matrices were reviewed: (i) the technique; (ii) in vitro use for soft tissue engineering; (iii) in vivo use for reconstruction of soft tissues in animals; and (iv) clinical use in humans. RESULTS Electrospun matrices provide a synthetic mimic of natural extracellular matrix (ECM), favoring cellular attachment, proliferation and matrix deposition, through which a proper, low-inflammatory tissue-implant interaction can be established. Electrospun sheets can also be created with sufficient mechanical strength and stiffness for usage in prolapse surgery. CONCLUSION Electrospun matrices mimic the structural topography of the extracellular matrix and can be functionalized for better biological performance. As such, they have great potential for the next generation of urogynecological implants. However, their long-term safety and efficacy must still be established in vivo.
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Affiliation(s)
- Mahshid Vashaghian
- Department of Obstetrics & Gynaecology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Sebastianus J Zaat
- Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Theodoor H Smit
- Department of Medical Biology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Jan-Paul Roovers
- Department of Obstetrics & Gynaecology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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94
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Amariei N, Manea LR, Bertea AP, Cramariuc R, Bertea A, Cramariuc O. Electrospinning Polyaniline for Sensors. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1757-899x/209/1/012091] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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95
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Ren Z, Ma S, Jin L, Liu Z, Liu D, Zhang X, Cai Q, Yang X. Repairing a bone defect with a three-dimensional cellular construct composed of a multi-layered cell sheet on electrospun mesh. Biofabrication 2017. [PMID: 28631613 DOI: 10.1088/1758-5090/aa747f] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
In addition to providing maneuverability, electrospun nanofibrous meshes can make excellent supports for constructing flexible cell sheets to regulate cell behavior by nanofiber features. With the target of bone regeneration, herein composite nanofibers with two different fiber arrangements (nestlike, random) were electrospun from a blend solution containing poly(l-lactide) (PLLA) and gelatin (1:1 in weight ratio). Unlike the non-woven morphology in a random nanofibrous mesh, PLLA/gelatin composite nanofibers in the nestlike nanofibrous mesh displayed both non-woven and parallel morphologies. Both kinds of nanofibrous mesh were ∼50 μm thick as-prepared, and shrank to ∼30 μm after seeding with bone mesenchymal stromal cells (BMSCs). After 7 days of in vitro culture, cell sheets could form on both meshes (CSM) and on the culture plate. It was found that application of nanofibrous mesh promoted the osteogenic differentiation of BMSC sheets compared with the control. The nestlike mesh displayed slight superiority over the random mesh in enhancing osteogenic differentiation, but their different fiber arrangements did not cause much difference in cell proliferation. Three-dimensional multi-layered CSM constructs were built by stacking four mono-layered CSMs together. The CSM constructs (based on a nestlike or random nanofibrous mesh) were incubated in vitro for 3 days before being implanted into rat cranial defects. In comparison with the control group, there was significant formation of new calcified bone in both CSM construct-filled groups at 12 weeks' post-operation. The nestlike group showed slightly better bone healing (based on both qualitative and quantitative analysis) than the random group, while showing insignificant differences. We showed that the concept of using a three-dimensional multi-layered CSM construct in enhancing bone regeneration was feasible. Future studies should take more nanofiber features (e.g. bioactive components) into account to further enhance osteogenesis.
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Affiliation(s)
- Zhiwei Ren
- State Key Laboratory of Organic-Inorganic Composites; Beijing Laboratory of Biomedical Materials; Beijing University of Chemical Technology, Beijing 100029, People's Republic of China
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96
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Kim M, Yun HS, Kim GH. Electric-field assisted 3D-fibrous bioceramic-based scaffolds for bone tissue regeneration: Fabrication, characterization, and in vitro cellular activities. Sci Rep 2017; 7:3166. [PMID: 28600540 PMCID: PMC5466689 DOI: 10.1038/s41598-017-03461-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 04/26/2017] [Indexed: 01/08/2023] Open
Abstract
Nano/microfibrous structure can induce high cellular activities because of the topological similarity of the extracellular matrix, and thus, are widely used in various tissue regenerative materials. However, the fabrication of a bioceramic (high weight percent)-based 3D microfibrous structure is extremely difficult because of the low process-ability of bioceramics. In addition, three-dimensional (3D) microfibrous structure can induce more realistic cellular behavior when compared to that of 2D fibrous structure. Hence, the requirement of a 3D fibrous ceramic-based structure is an important issue in bioceramic scaffolds. In this study, a bioceramic (α-TCP)-based scaffold in which the weight fraction of the ceramic exceeded 70% was fabricated using an electrohydrodynamic printing (EHDP) process. The fabricated ceramic structure consisted of layer-by-layered struts entangled with polycaprolactone microfibers and the bioceramic phase. Various processing conditions (such as applied electric field, flow rate, nozzle size, and weight fraction of the bioceramic) were manipulated to obtain an optimal processing window. A 3D printed porous structure was used as a control, which had pore geometry similar to that of a structure fabricated using the EHDP process. Various physical and cellular activities using preosteoblasts (MC3T3-E1) helped confirm that the newly designed bioceramic scaffold demonstrated significantly high metabolic activity and mineralization.
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Affiliation(s)
- Minseong Kim
- Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU), Suwon, South Korea
| | - Hui-Suk Yun
- Powder and Ceramics Division, Korea Institute of Materials Science (KIMS), Changwon, South Korea
| | - Geun Hyung Kim
- Department of Biomechatronic Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University (SKKU), Suwon, South Korea.
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97
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Davarpanah Jazi R, Rafienia M, Salehi Rozve H, Karamian E, Sattary M. Fabrication and characterization of electrospun poly lactic-co-glycolic acid/zeolite nanocomposite scaffolds using bone tissue engineering. J BIOACT COMPAT POL 2017. [DOI: 10.1177/0883911517707774] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Poly lactic- co-glycolic acid/zeolite nanocomposite scaffolds were prepared with 17 (wt%) poly lactic- co-glycolic acid (75:25) and 3, 7, and 10 (wt%) nanocrystalline zeolite particles by electrospinning poly lactic- co-glycolic acid and nanocrystalline zeolite with an average diameter of crystals equal to 42 nm. The field-emission scanning electron microscope images confirmed that fibers had no beads. In vitro mineralization in the simulated body fluid revealed that the poly lactic- co-glycolic acid/zeolite nanoscaffolds had strong bioactivity behavior and apatite crystals were formed on the scaffolds. Mechanical properties were improved in the nanocomposite scaffolds compared to the poly lactic- co-glycolic acid scaffold. Biodegradation of scaffolds was tested by being immersed and incubated in phosphate-buffered saline for 90 days, and the effect of zeolite on the degradation rate was also studied. The biological performance of nanoscaffolds and poly lactic- co-glycolic acid was assessed by in vitro culture of MG63 osteosarcoma cell line, 3-(4,5-dimethylthiazol-2-yl)-2,5-dimethiyltetrazolium-bromide assay, and 4′,6-diamidino-2-phenylindole staining. All types of scaffolds were cell compatible and could support cell proliferation. Poly lactic- co-glycolic acid/zeolite (3 and 7 (wt%)) showed cell viability and proliferation since 1, 4, and 7 days after the implantation. The cell adherence to the scaffolds was also studied by scanning electron microscope images. The results showed that MG63 cells adhered to the nanocomposites. Besides, all the results illustrated that nanocomposite scaffold with 7 (wt%) zeolite is the most suitable scaffold for bone tissue engineering.
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Affiliation(s)
| | - Mohammad Rafienia
- Biosensor Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Hossein Salehi Rozve
- Department of Anatomical Sciences and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ebrahim Karamian
- Biomaterials Group, Department of Materials Engineering, Islamic Azad University, Isfahan, Iran
| | - Mansooreh Sattary
- Department of Biomedical Engineering, Islamic Azad University, Tehran, Iran
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98
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Song W, Chen L, Seta J, Markel DC, Yu X, Ren W. Corona Discharge: A Novel Approach To Fabricate Three-Dimensional Electrospun Nanofibers for Bone Tissue Engineering. ACS Biomater Sci Eng 2017; 3:1146-1153. [DOI: 10.1021/acsbiomaterials.7b00061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wei Song
- Department of Biomedical
Engineering, Wayne State University, Detroit, Michigan 48201, United States
| | - Liang Chen
- Department of Biomedical
Engineering, Wayne State University, Detroit, Michigan 48201, United States
| | - Joseph Seta
- Department of Biomedical
Engineering, Wayne State University, Detroit, Michigan 48201, United States
| | - David C. Markel
- Department of Biomedical
Engineering, Wayne State University, Detroit, Michigan 48201, United States
- Department
of Orthopaedic Surgery, Providence Hospital, Southfield, Michigan 48075, United States
| | - Xiaowei Yu
- Department
of Orthopaedics, Shanghai Sixth People’s Hospital, Shanghai 200231, China
| | - Weiping Ren
- Department of Biomedical
Engineering, Wayne State University, Detroit, Michigan 48201, United States
- Department
of Orthopaedic Surgery, Providence Hospital, Southfield, Michigan 48075, United States
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99
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Horner CB, Hirota K, Liu J, Maldonado M, Hyle Park B, Nam J. Magnitude‐dependent and inversely‐related osteogenic/chondrogenic differentiation of human mesenchymal stem cells under dynamic compressive strain. J Tissue Eng Regen Med 2017; 12:e637-e647. [DOI: 10.1002/term.2332] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Revised: 08/01/2016] [Accepted: 09/26/2016] [Indexed: 01/02/2023]
Affiliation(s)
| | - Koji Hirota
- Department of BioengineeringUniversity of California Riverside CA 92521 USA
| | - Junze Liu
- Department of BioengineeringUniversity of California Riverside CA 92521 USA
| | - Maricela Maldonado
- Department of BioengineeringUniversity of California Riverside CA 92521 USA
| | - B. Hyle Park
- Department of BioengineeringUniversity of California Riverside CA 92521 USA
| | - Jin Nam
- Department of BioengineeringUniversity of California Riverside CA 92521 USA
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100
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Aghajanpoor M, Hashemi-Najafabadi S, Baghaban-Eslaminejad M, Bagheri F, Mohammad Mousavi S, Azam Sayyahpour F. The effect of increasing the pore size of nanofibrous scaffolds on the osteogenic cell culture using a combination of sacrificial agent electrospinning and ultrasonication. J Biomed Mater Res A 2017; 105:1887-1899. [PMID: 28256792 DOI: 10.1002/jbm.a.36052] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 02/27/2017] [Accepted: 02/28/2017] [Indexed: 12/31/2022]
Abstract
One of the major problems associated with the electrospun scaffolds is their small pore size, which limits the cellular infiltration for bone tissue engineering. In this study, the effect of increasing the pore size on cellular infiltration was studied in poly/nanohydroxyapatite electrospun scaffolds, which were modified using ultrasonication, co-electrospinning with poly (ethylene oxide), and a combination of both. Ultrasonic process was optimized by central composite design. The ultrasonic output power and time of the process were considered as the effective parameters. The pore size of the scaffolds was evaluated by scanning electron microscope. The optimum conditions, according to the pore area and mechanical properties of the scaffolds were selected, and finally the groups that had the highest pore size and mechanical strength were selected for the combined method. Increasing the pore size enhanced the cellular proliferation, extension and infiltration, as well as the osteodifferentiation of stem cells. At the optimum condition, the average cellular infiltration was 36.51 µm compared to the control group with no cellular infiltration. In addition, alkaline phosphatase activity and the expression of osteocalcin and collagen I (COL I) were, respectively, 1.86, 2.54, and 2.16 fold compared to the control group on day 14. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 1887-1899, 2017.
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Affiliation(s)
- Mahdiyeh Aghajanpoor
- Department of Biomedical Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Sameereh Hashemi-Najafabadi
- Department of Biomedical Engineering, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Mohamadreza Baghaban-Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Fatemeh Bagheri
- Department of Biotechnology, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Seyyed Mohammad Mousavi
- Department of Biotechnology, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Foruogh Azam Sayyahpour
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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