201
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Prabhakaran MP, Mobarakeh LG, Kai D, Karbalaie K, Nasr-Esfahani MH, Ramakrishna S. Differentiation of embryonic stem cells to cardiomyocytes on electrospun nanofibrous substrates. J Biomed Mater Res B Appl Biomater 2013; 102:447-54. [PMID: 24039141 DOI: 10.1002/jbm.b.33022] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 06/24/2013] [Accepted: 08/01/2013] [Indexed: 12/31/2022]
Abstract
The potential of pluripotent embryonic stem cells (ESCs) isolated from the inner mass of blastocysts are investigated for its ability to differentiate on biocompatible electrospun nanofibers, for regeneration of the myocardially infracted heart. Nanostructured poly(d,l-lactide-co-glycolide)/collagen (PLGA/Col) scaffolds with fiber diameters in the range of 300 ± 65 nm, was fabricated by electrospinning to mimic the extracellular matrix of the native tissue. During the culture of embryoid bodies outgrowth on the scaffolds, and further differentiation of ESCs to cardiomyocytes, the PLGA/Col nanofibers was found better than that of the electrospun PLGA nanofibers, where a better interaction and growth of ESC differentiated cardiomyocytes was observed on the composite scaffolds. The phenotypical characteristics of ESC-derived cardiomyocytes and molecular protein expression were carried out by scanning electron microscopy and immunocytochemistry, respectively. Our studies highlight the significance of a suitable material, its architecture, and cell-biomaterial interactions that is essential at a nanoscale level signifying the application of a bioengineered cardiac graft for stem cell differentiation and transplantation, which could be an intriguing strategy for cardiac regeneration.
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Affiliation(s)
- Molamma P Prabhakaran
- Center for Nanofibers and Nanotechnology, E3-05-14, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, Singapore, 117576
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202
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Ko J, Mohtaram NK, Ahmed F, Montgomery A, Carlson M, Lee PC, Willerth SM, Jun MB. Fabrication of poly (ϵ-caprolactone) microfiber scaffolds with varying topography and mechanical properties for stem cell-based tissue engineering applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 25:1-17. [DOI: 10.1080/09205063.2013.830913] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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203
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Ghoroghi FM, Hejazian LB, Esmaielzade B, Dodel M, Roudbari M, Nobakht M. Evaluation of the Effect of NT-3 and Biodegradable Poly-L-lactic Acid Nanofiber Scaffolds on Differentiation of Rat Hair Follicle Stem Cells into Neural Cells In Vitro. J Mol Neurosci 2013; 51:318-327. [PMID: 23959422 DOI: 10.1007/s12031-013-0073-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Accepted: 07/10/2013] [Indexed: 10/26/2022]
Abstract
Recent improvement in neuroscience has led to new strategies in neural repair. Hair follicle stem cells are high promising source of accessible, active, and pluripotent adult stem cells. They have high affinity to differentiate to neurons. Aside from using cell-scaffold combinations for implantation, scaffolds can provide a suitable microenvironment for cell proliferation, migration, and differentiation. NT-3 is the most interesting neurotrophic factors being an important regulator of neural survival and differentiation. Since treatment duration in neural repair is very important, this study aims to evaluate the effect of NT-3 and poly-L-lactic acid (PLLA) on differentiation time of bulge stem cells of rat hair follicle to neural-like cells. HFSCs of rat whisker was isolated and cultured on PLLA and differentiated with 10 ng/mL NT-3. Biological features of cultured cells were evaluated with immunocytochemistry and flowcytometry methods by using CD34, nestin, and βІІІ-tubulin markers. For cell viability and morphological assessment, MTT assay and SEM were performed. Our results showed that bulge stem cells of hair follicle can express CD34 and Nestin before differentiation. By using NT-3 during differentiation process, the cells showed positive reaction to βІІІ-tubulin antibody. MTT results demonstrated that PLLA significantly increased cell viability. Finally, HFSCs adhesion was confirmed by SEM results. The results indicate that 10 ng/mL NT-3 and PLLA have significant effect on differentiation time of rat HFSCs to neural cells even in 10 days.
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204
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Yeon B, Park MH, Moon HJ, Kim SJ, Cheon YW, Jeong B. 3D Culture of Adipose-Tissue-Derived Stem Cells Mainly Leads to Chondrogenesis in Poly(ethylene glycol)-Poly(l-alanine) Diblock Copolymer Thermogel. Biomacromolecules 2013; 14:3256-66. [DOI: 10.1021/bm400868j] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Bora Yeon
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Min Hee Park
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Hyo Jung Moon
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Seung-Jin Kim
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
| | - Young Woo Cheon
- Department of Plastic
and Reconstructive Surgery, Gachon University Gil Medical Center, Incheon, Korea
| | - Byeongmoon Jeong
- Department of Chemistry
and Nano Science, Ewha Global Top 5 Research Program, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu,
Seoul, 120-750, Korea
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205
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Alessandri M, Lizzo G, Gualandi C, Mangano C, Giuliani A, Focarete ML, Calzà L. Influence of biological matrix and artificial electrospun scaffolds on proliferation, differentiation and trophic factor synthesis of rat embryonic stem cells. Matrix Biol 2013; 33:68-76. [PMID: 23954537 DOI: 10.1016/j.matbio.2013.08.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 08/02/2013] [Accepted: 08/02/2013] [Indexed: 01/06/2023]
Abstract
Two-dimensional vs three-dimensional culture conditions, such as the presence of extracellular matrix components, could deeply influence the cell fate and properties. In this paper we investigated proliferation, differentiation, survival, apoptosis, growth and neurotrophic factor synthesis of rat embryonic stem cells (RESCs) cultured in 2D and 3D conditions generated using Cultrex® Basement Membrane Extract (BME) and in poly-(L-lactic acid) (PLLA) electrospun sub-micrometric fibres. It is demonstrated that, in the absence of other instructive stimuli, growth, differentiation and paracrine activity of RESCs are directly affected by the different microenvironment provided by the scaffold. In particular, RESCs grown on an electrospun PLLA scaffolds coated or not with BME have a higher proliferation rate, higher production of bioactive nerve growth factor (NGF) and vascular endothelial growth factor (VEGF) compared to standard 2D conditions, lasting for at least 2 weeks. Due to the high mechanical flexibility of PLLA electrospun scaffolds, the PLLA/stem cell culture system offers an interesting potential for implantable neural repair devices.
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Affiliation(s)
- M Alessandri
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy.
| | - G Lizzo
- Department of Veterinary Medical Science, University of Bologna, Bologna, Italy.
| | - C Gualandi
- Department of Chemistry "G. Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), University of Bologna, Bologna, Italy; Advanced Applications in Mechanical Engineering and Materials Technology. Interdepartmental Center for Industrial Research, University of Bologna, Bologna, Italy.
| | - C Mangano
- Department of Veterinary Medical Science, University of Bologna, Bologna, Italy
| | - A Giuliani
- Department of Veterinary Medical Science, University of Bologna, Bologna, Italy.
| | - M L Focarete
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy; Department of Chemistry "G. Ciamician" and National Consortium of Materials Science and Technology (INSTM, Bologna RU), University of Bologna, Bologna, Italy.
| | - L Calzà
- Health Sciences and Technologies-Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy; Department of Veterinary Medical Science, University of Bologna, Bologna, Italy.
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206
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Ren YJ, Zhang S, Mi R, Liu Q, Zeng X, Rao M, Hoke A, Mao HQ. Enhanced differentiation of human neural crest stem cells towards the Schwann cell lineage by aligned electrospun fiber matrix. Acta Biomater 2013; 9:7727-36. [PMID: 23628775 DOI: 10.1016/j.actbio.2013.04.034] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Revised: 03/25/2013] [Accepted: 04/18/2013] [Indexed: 01/03/2023]
Abstract
Human pluripotent stem cell-derived neural crest stem cells (NCSCs) provide a promising cell source for generating Schwann cells in the treatment of neurodegenerative diseases and traumatic injuries in the peripheral nervous system. Influencing cell behavior through a synthetic matrix topography has been shown to be an effective approach to directing stem cell proliferation and differentiation. Here we have investigated the effect of nanofiber topography on the differentiation of human embryonic stem cell-derived NCSCs towards the Schwann cell lineage. Using electrospun fibers of different diameters and alignments we demonstrated that aligned fiber matrices effectively induced cell alignment, and that fiber matrices with average diameters of 600nm and 1.6μm most effectively promoted NCSC differentiation towards the Schwann cell lineage compared with random fibers and two-dimensional tissue culture plates. More importantly, human NCSCs that were predifferentiated in Schwann cell medium for 2weeks exhibited higher sensitivity to the aligned fiber topography than undifferentiated NCSCs. This study provides an efficient protocol for Schwann cell derivation by combining an aligned nanofiber matrix and an optimized differentiation medium, and highlights the importance of matching extrinsic matrix signaling with cell intrinsic programming in a temporally specific manner.
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207
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Kim J, Kim HN, Lim KT, Kim Y, Pandey S, Garg P, Choung YH, Choung PH, Suh KY, Chung JH. Synergistic effects of nanotopography and co-culture with endothelial cells on osteogenesis of mesenchymal stem cells. Biomaterials 2013; 34:7257-68. [PMID: 23834896 DOI: 10.1016/j.biomaterials.2013.06.029] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 06/14/2013] [Indexed: 02/08/2023]
Abstract
Inspired by the aligned nanostructures and co-existence of vascular cells and stem cells in human cancellous bone, we quantitatively investigated the relative contributions of nanotopography and co-culture with human umbilical endothelial cells (HUVECs) to the osteogenesis of human mesenchymal stem cells (hMSCs). Although both nanotopography and co-culture independently enhanced the osteogenesis of hMSCs, osteogenesis was further enhanced by the two factors in combination, indicating the importance of synergistic cues in stem cell engineering. Interestingly, nanotopography provided a larger relative contribution to the osteogenesis of hMSCs than did co-culture with HUVECs. Furthermore, the osteogenesis of hMSCs was also affected by the density of parallel nanogrooves, exhibiting a maximum at a 1:3 spacing ratio, as defined as the ratio of ridge width to groove width. Analysis of (i) biochemical soluble factors, (ii) hMSC-substrate interaction and (iii) hMSC-HUVEC interaction suggests that (ii) and (iii) play a crucial role in mediating osteogenic phenotypes.
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Affiliation(s)
- Jangho Kim
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul 151-742, Republic of Korea
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208
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Marquardt LM, Sakiyama-Elbert SE. Engineering peripheral nerve repair. Curr Opin Biotechnol 2013; 24:887-92. [PMID: 23790730 DOI: 10.1016/j.copbio.2013.05.006] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Revised: 05/24/2013] [Accepted: 05/27/2013] [Indexed: 01/13/2023]
Abstract
Current approaches for treating peripheral nerve injury have resulted in promising, yet insufficient functional recovery compared to the clinical standard of care, autologous nerve grafts. In order to design a construct that can match the regenerative potential of the autograft, all facets of nerve tissue must be incorporated in a combinatorial therapy. Engineered biomaterial scaffolds in the future will have to promote enhanced regeneration and appropriate reinnervation by targeting the highly sensitive response of regenerating nerves to their surrounding microenvironment.
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Affiliation(s)
- Laura M Marquardt
- Department of Biomedical Engineering, Washington University, St. Louis, MO 63130, USA
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209
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Kim HN, Jiao A, Hwang NS, Kim MS, Kang DH, Kim DH, Suh KY. Nanotopography-guided tissue engineering and regenerative medicine. Adv Drug Deliv Rev 2013; 65:536-58. [PMID: 22921841 PMCID: PMC5444877 DOI: 10.1016/j.addr.2012.07.014] [Citation(s) in RCA: 253] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 07/19/2012] [Accepted: 07/23/2012] [Indexed: 12/14/2022]
Abstract
Human tissues are intricate ensembles of multiple cell types embedded in complex and well-defined structures of the extracellular matrix (ECM). The organization of ECM is frequently hierarchical from nano to macro, with many proteins forming large scale structures with feature sizes up to several hundred microns. Inspired from these natural designs of ECM, nanotopography-guided approaches have been increasingly investigated for the last several decades. Results demonstrate that the nanotopography itself can activate tissue-specific function in vitro as well as promote tissue regeneration in vivo upon transplantation. In this review, we provide an extensive analysis of recent efforts to mimic functional nanostructures in vitro for improved tissue engineering and regeneration of injured and damaged tissues. We first characterize the role of various nanostructures in human tissues with respect to each tissue-specific function. Then, we describe various fabrication methods in terms of patterning principles and material characteristics. Finally, we summarize the applications of nanotopography to various tissues, which are classified into four types depending on their functions: protective, mechano-sensitive, electro-active, and shear stress-sensitive tissues. Some limitations and future challenges are briefly discussed at the end.
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Affiliation(s)
- Hong Nam Kim
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Alex Jiao
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Nathaniel S. Hwang
- School of Chemical and Biological Engineering, Institute for Chemical Processing, Seoul National University, Seoul 151-742, Republic of Korea
| | - Min Sung Kim
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Do Hyun Kang
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Deok-Ho Kim
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Kahp-Yang Suh
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
- Institute of Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea
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210
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Kingham E, Oreffo ROC. Embryonic and induced pluripotent stem cells: understanding, creating, and exploiting the nano-niche for regenerative medicine. ACS NANO 2013; 7:1867-81. [PMID: 23414366 PMCID: PMC3610401 DOI: 10.1021/nn3037094] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 01/25/2013] [Indexed: 05/26/2023]
Abstract
Embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs) have the capacity to differentiate into any specialized cell type of the human body, and therefore, ESC/iPSC-derived cell types offer great potential for regenerative medicine. However, key to realizing this potential requires a strong understanding of stem cell biology, techniques to maintain stem cells, and strategies to manipulate cells to efficiently direct cell differentiation toward a desired cell type. As nanoscale science and engineering continues to produce novel nanotechnology platforms, which inform, infiltrate, and impinge on many aspects of everyday life, it is no surprise that stem cell research is turning toward developments in nanotechnology to answer research questions and to overcome obstacles in regenerative medicine. Here we discuss recent advances in ESC and iPSC manipulation using nanomaterials and highlight future challenges within this area of research.
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Affiliation(s)
- Emmajayne Kingham
- Bone and Joint Research Group, Centre for Human Development, Stem Cells and Regeneration, Human Development and Health, Institute of Developmental Sciences, University of Southampton, Southampton SO16 6YD, United Kingdom.
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211
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Borjigin M, Eskridge C, Niamat R, Strouse B, Bialk P, Kmiec EB. Electrospun fiber membranes enable proliferation of genetically modified cells. Int J Nanomedicine 2013; 8:855-64. [PMID: 23467983 PMCID: PMC3587395 DOI: 10.2147/ijn.s40117] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Polycaprolactone (PCL) and its blended composites (chitosan, gelatin, and lecithin) are well-established biomaterials that can enrich cell growth and enable tissue engineering. However, their application in the recovery and proliferation of genetically modified cells has not been studied. In the study reported here, we fabricated PCL-biomaterial blended fiber membranes, characterized them using physicochemical techniques, and used them as templates for the growth of genetically modified HCT116-19 colon cancer cells. Our data show that the blended polymers are highly miscible and form homogenous electrospun fiber membranes of uniform texture. The aligned PCL nanofibers support robust cell growth, yielding a 2.5-fold higher proliferation rate than cells plated on standard plastic plate surfaces. PCL-lecithin fiber membranes yielded a 2.7-fold higher rate of proliferation, while PCL-chitosan supported a more modest growth rate (1.5-fold higher). Surprisingly, PCL-gelatin did not enhance cell proliferation when compared to the rate of cell growth on plastic surfaces.
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Affiliation(s)
- Mandula Borjigin
- Department of Chemistry, Delaware State University, Dover, DE 19901, USA
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212
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Previtera ML, Hui M, Verma D, Shahin AJ, Schloss R, Langrana NA. The effects of substrate elastic modulus on neural precursor cell behavior. Ann Biomed Eng 2013; 41:1193-207. [PMID: 23429962 DOI: 10.1007/s10439-013-0765-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 02/13/2013] [Indexed: 01/14/2023]
Abstract
The spinal cord has a limited capacity to self-repair. After injury, endogenous stem cells are activated and migrate, proliferate, and differentiate into glial cells. The absence of neuronal differentiation has been partly attributed to the interaction between the injured microenvironment and neural stem cells. In order to improve post-injury neuronal differentiation and/or maturation potential, cell-cell and cell-biochemical interactions have been investigated. However, little is known about the role of stem cell-matrix interactions on stem cell-mediated repair. Here, we specifically examined the effects of matrix elasticity on stem cell-mediated repair in the spinal cord, since spinal cord injury results in drastic changes in parenchyma elasticity and viscosity. Spinal cord-derived neural precursor cells (NPCs) were grown on bis-acrylamide substrates with various rigidities. NPC growth, proliferation, and differentiation were examined and optimal in the range of normal spinal cord elasticity. In conclusion, limitations in NPC growth, proliferation, and neuronal differentiation were encountered when substrate elasticity was not within normal spinal cord tissue elasticity ranges. These studies elucidate the effect injury mediated mechanical changes may have on tissue repair by stem cells. Furthermore, this information can be applied to the development of future neuroregenerative biomaterials for spinal cord repair.
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Affiliation(s)
- Michelle L Previtera
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, NJ 08854, USA
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213
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Low WC, Rujitanaroj PO, Lee DK, Messersmith PB, Stanton LW, Goh E, Chew SY. Nanofibrous scaffold-mediated REST knockdown to enhance neuronal differentiation of stem cells. Biomaterials 2013; 34:3581-90. [PMID: 23415645 DOI: 10.1016/j.biomaterials.2013.01.093] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 01/26/2013] [Indexed: 02/06/2023]
Abstract
At present, the recovery prospect for patients with chronic neurodegenerative diseases or acute trauma in the central nervous system is sub-optimal. The controlled differentiation of neural stem/progenitor cells (NPCs) to functional neurons is a possible treatment strategy. In contrast to the classical approach of biochemicals supplementation for guided stem cell commitment, this study explores the feasibility of directing neuronal differentiation through synergistic integration of three-dimensional nanofibrous topographical cues and scaffold-mediated knockdown of RE-1 silencing transcription factor (REST) in mouse NPCs. Taking advantage of the strong adhesive property and latent reactivity of mussel-inspired polydopamine (PD) coating, electrospun polycaprolactone (PCL) nanofibers were successfully functionalized with REST siRNAs (denoted as siREST PD-fiber). Sustained REST knockdown in NPCs was achieved for up to five days in vitro and the silencing efficiency was significantly higher than that mediated through siRNA adsorption onto non-PD coated sample controls. The silencing of REST, together with nanofiber topographical effect, significantly enhanced NPC neuronal commitment (57.5% Map2(+) cells in siREST PD-fiber vs. 43.5% in siREST PD-film vs. 50% in PD-fiber controls, p < 0.05) while reducing astrocytic and oligodendrocytic differentiation (10.7% O4(+) cells vs. ∼30% in siREST PD-film, p < 0.01). Taken together, the synergistic effects of scaffold-mediated REST knockdown and topographical cues from PD-modified nanofibers may be a useful strategy for generating functional neurons for therapeutic purposes.
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Affiliation(s)
- Wei Ching Low
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
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214
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Higuchi A, Ling QD, Chang Y, Hsu ST, Umezawa A. Physical Cues of Biomaterials Guide Stem Cell Differentiation Fate. Chem Rev 2013; 113:3297-328. [DOI: 10.1021/cr300426x] [Citation(s) in RCA: 335] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Akon Higuchi
- Department of Chemical and Materials
Engineering, National Central University, Jhongli, Taoyuan 32001, Taiwan
- Department of Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura,
Setagaya-ku, Tokyo 157-8535, Japan
- Cathay Medical Research Institute, Cathay General Hospital, No. 32, Ln 160, Jian-Cheng Road, Hsi-Chi City, Taipei 221, Taiwan
| | - Qing-Dong Ling
- Cathay Medical Research Institute, Cathay General Hospital, No. 32, Ln 160, Jian-Cheng Road, Hsi-Chi City, Taipei 221, Taiwan
- Institute of Systems Biology
and Bioinformatics, National Central University, No. 300 Jhongda Rd., Jhongli, Taoyuan 32001, Taiwan
| | - Yung Chang
- Department of Chemical Engineering, R&D Center for Membrane Technology, Chung Yuan Christian University, 200 Chung-Bei Rd., Jhongli, Taoyuan 320, Taiwan
| | - Shih-Tien Hsu
- Taiwan Landseed Hospital, 77 Kuangtai Road, Pingjen City, Tao-Yuan
County 32405, Taiwan
| | - Akihiro Umezawa
- Department of Reproductive Biology, National Research Institute for Child Health and Development, 2-10-1 Okura,
Setagaya-ku, Tokyo 157-8535, Japan
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215
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Nanofiber-mediated release of retinoic acid and brain-derived neurotrophic factor for enhanced neuronal differentiation of neural progenitor cells. Drug Deliv Transl Res 2013; 5:89-100. [DOI: 10.1007/s13346-013-0131-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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216
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Mohtaram NK, Montgomery A, Willerth SM. Biomaterial-based drug delivery systems for the controlled release of neurotrophic factors. Biomed Mater 2013; 8:022001. [DOI: 10.1088/1748-6041/8/2/022001] [Citation(s) in RCA: 80] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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217
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Lim KT, Kim J, Seonwoo H, Chang JU, Choi H, Hexiu J, Cho WJ, Choung PH, Chung JH. Enhanced Osteogenesis of Human Alveolar Bone-Derived Mesenchymal Stem Cells for Tooth Tissue Engineering Using Fluid Shear Stress in a Rocking Culture Method. Tissue Eng Part C Methods 2013; 19:128-45. [DOI: 10.1089/ten.tec.2012.0017] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- Ki-Taek Lim
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Jangho Kim
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Hoon Seonwoo
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Jung Uk Chang
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Hwajung Choi
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jin Hexiu
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Woo Jae Cho
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Pill-Hoon Choung
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
- Tooth Bioengineering National Research Laboratory of Post BK21, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jong Hoon Chung
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
- Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Korea
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218
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219
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Lim KT, Kim J, Seonwoo H, Chang JU, Choi H, Hexiu J, Cho WJ, Choung PH, Chung JH. Enhanced Osteogenesis of Human Alveolar Bone-Derived Mesenchymal Stem Cells for Tooth Tissue Engineering Using Fluid Shear Stress in a Rocking Culture Method. Tissue Eng Part C Methods 2013. [DOI: 10.1089/ten.tec.2012.0017 pm id,23088630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Affiliation(s)
- Ki-Taek Lim
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Jangho Kim
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Hoon Seonwoo
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Jung Uk Chang
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Hwajung Choi
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jin Hexiu
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Woo Jae Cho
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
| | - Pill-Hoon Choung
- Department of Oral and Maxillofacial Surgery and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
- Tooth Bioengineering National Research Laboratory of Post BK21, School of Dentistry, Seoul National University, Seoul, Korea
| | - Jong Hoon Chung
- Department of Biosystems and Biomaterials Science and Engineering, Seoul National University, Seoul, Korea
- Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul, Korea
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220
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Wang ZY, Teo EY, Chong MSK, Zhang QY, Lim J, Zhang ZY, Hong MH, Thian ES, Chan JKY, Teoh SH. Biomimetic three-dimensional anisotropic geometries by uniaxial stretch of poly(ε-caprolactone) films for mesenchymal stem cell proliferation, alignment, and myogenic differentiation. Tissue Eng Part C Methods 2013. [PMID: 23198964 DOI: 10.1089/ten.tec.2012.0472] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Anisotropic geometries are critical for eliciting cell alignment to dictate tissue microarchitectures and biological functions. Current fabrication techniques are complex and utilize toxic solvents, hampering their applications for translational research. Here, we present a novel simple, solvent-free, and reproducible method via uniaxial stretching for incorporating anisotropic topographies on bioresorbable films with ambitions to realize stem cell alignment control. Uniaxial stretching of poly(ε-caprolactone) (PCL) films resulted in a three-dimensional micro-ridge/groove topography (inter-ridge-distance: ~6 μm; ridge-length: ~90 μm; ridge-depth: 200-900 nm) with uniform distribution and controllable orientation by the direction of stretch on the whole film surface. When stretch temperature (Ts) and draw ratio (DR) were increased, the inter-ridge-distance was reduced and ridge-length increased. Through modification of hydrolysis, increased surface hydrophilicity was achieved, while maintaining the morphology of PCL ridge/grooves. Upon seeding human mesenchymal stem cells (hMSCs) on uniaxial-stretched PCL (UX-PCL) films, aligned hMSC organization was obtained. Compared to unstretched films, hMSCs on UX-PCL had larger increase in cellular alignment (>85%) and elongation, without indication of cytotoxicity or reduction in cellular proliferation. This aligned hMSC organization was homogenous and stably maintained with controlled orientation along the ridges on the whole UX-PCL surface for over 2 weeks. Moreover, the hMSCs on UX-PCL had a higher level of myogenic genes' expression than that on the unstretched films. We conclude that uniaxial stretching has potential in patterning film topography with anisotropic structures. The UX-PCL in conjunction with hMSCs could be used as "basic units" to create tissue constructs with microscale control of cellular alignment and elongation for tissue engineering applications.
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Affiliation(s)
- Zu-yong Wang
- Department of Mechanical Engineering, National University of Singapore, Singapore, Singapore
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221
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Holan V, Javorkova E, Trosan P. The growth and delivery of mesenchymal and limbal stem cells using copolymer polyamide 6/12 nanofiber scaffolds. Methods Mol Biol 2013; 1014:187-99. [PMID: 23690014 DOI: 10.1007/978-1-62703-432-6_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2022]
Abstract
The injured or otherwise damaged cornea is healed by limbal stem cells (LSC). If the limbus where LSC reside is also damaged or nonfunctional, the cornea cannot heal properly and this defect leads to impaired vision that can result in blindness. The only way to treat total LSC deficiency is by transplantation of limbal tissue or a transfer of LSC. Recently, mesenchymal stem cells (MSC) have been shown as another promising source of stem cells for corneal healing and regeneration. Here, we describe a protocol for the use of polyamide 6/12 nanofiber scaffolds for the growth of MSC and LSC, and for their transfer onto a mechanically damaged ocular surface in the experimental mouse model.
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Affiliation(s)
- Vladimir Holan
- Institute of Experimental Medicine, Academy of Sciences of the Czech Republic, Prague, Czech Republic
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222
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223
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Proliferation of genetically modified human cells on electrospun nanofiber scaffolds. MOLECULAR THERAPY-NUCLEIC ACIDS 2012; 1:e59. [PMID: 23212298 PMCID: PMC3530926 DOI: 10.1038/mtna.2012.51] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Gene editing is a process by which single base mutations can be corrected, in the context
of the chromosome, using single-stranded oligodeoxynucleotides (ssODNs). The survival and
proliferation of the corrected cells bearing modified genes, however, are impeded by a
phenomenon known as reduced proliferation phenotype (RPP); this is a barrier to practical
implementation. To overcome the RPP problem, we utilized nanofiber scaffolds as templates
on which modified cells were allowed to recover, grow, and expand after gene editing.
Here, we present evidence that some HCT116-19, bearing an integrated, mutated enhanced
green fluorescent protein (eGFP) gene and corrected by gene editing, proliferate on
polylysine or fibronectin-coated polycaprolactone (PCL) nanofiber scaffolds. In contrast,
no cells from the same reaction protocol plated on both regular dish surfaces and
polylysine (or fibronectin)-coated dish surfaces proliferate. Therefore, growing
genetically modified (edited) cells on electrospun nanofiber scaffolds promotes the
reversal of the RPP and increases the potential of gene editing as an ex vivo
gene therapy application.
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224
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Gualandi C, Govoni M, Foroni L, Valente S, Bianchi M, Giordano E, Pasquinelli G, Biscarini F, Focarete ML. Ethanol disinfection affects physical properties and cell response of electrospun poly(l-lactic acid) scaffolds. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.09.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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225
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Purcell EK, Naim Y, Yang A, Leach MK, Velkey JM, Duncan RK, Corey JM. Combining topographical and genetic cues to promote neuronal fate specification in stem cells. Biomacromolecules 2012; 13:3427-38. [PMID: 23098293 PMCID: PMC3992984 DOI: 10.1021/bm301220k] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
There is little remedy for the devastating effects resulting from neuronal loss caused by neural injury or neurodegenerative disease. Reconstruction of damaged neural circuitry with stem cell-derived neurons is a promising approach to repair these defects, but controlling differentiation and guiding synaptic integration with existing neurons remain significant unmet challenges. Biomaterial surfaces can present nanoscale topographical cues that influence neuronal differentiation and process outgrowth. By combining these scaffolds with additional molecular biology strategies, synergistic control over cell fate can be achieved. Here, we review recent progress in promoting neuronal fate using techniques at the interface of biomaterial science and genetic engineering. New data demonstrates that combining nanofiber topography with an induced genetic program enhances neuritogenesis in a synergistic fashion. We propose combining patterned biomaterial surface cues with prescribed genetic programs to achieve neuronal cell fates with the desired sublineage specification, neurochemical profile, targeted integration, and electrophysiological properties.
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Affiliation(s)
- Erin K Purcell
- University of Michigan, 1150 W. Medical Center Drive, 5323A Med Sci I, Ann Arbor, MI 48109, USA
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226
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Kai D, Jin G, Prabhakaran MP, Ramakrishna S. Electrospun synthetic and natural nanofibers for regenerative medicine and stem cells. Biotechnol J 2012; 8:59-72. [DOI: 10.1002/biot.201200249] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 09/05/2012] [Accepted: 10/08/2012] [Indexed: 11/07/2022]
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227
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Kolind K, Leong KW, Besenbacher F, Foss M. Guidance of stem cell fate on 2D patterned surfaces. Biomaterials 2012; 33:6626-33. [DOI: 10.1016/j.biomaterials.2012.05.070] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 05/30/2012] [Indexed: 01/01/2023]
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228
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Xie J, Ma B, Michael PL, Shuler FD. Fabrication of nanofiber scaffolds with gradations in fiber organization and their potential applications. Macromol Biosci 2012; 12:1336-41. [PMID: 22847852 PMCID: PMC3544006 DOI: 10.1002/mabi.201200115] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Indexed: 12/11/2022]
Abstract
A new and simple method for fabrication of nanofiber scaffolds with gradations in fiber organization is reported. The nanofiber organization, achieved by deposition of random fibers on the uniaxially aligned nanofiber mat in a gradient manner, directed morphological changes of applied adipose-derived stem cells. These morphological changes and resultant biochemical changes can help mimic the structural orientation of complex biomechanical structures like the collagen fiber structure at the tendon-to-bone insertion site. In addition, chemical gradients can be established through nanoencapsulation in this novel scaffold allowing for enhanced biomedical applications.
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Affiliation(s)
- Jingwei Xie
- Marshall Institute for Interdisciplinary Research and Center for Diagnostic Nanosystems, Marshall University, Huntington, WV 25755, USA.
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229
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230
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Kshitiz, Park J, Kim P, Helen W, Engler AJ, Levchenko A, Kim DH. Control of stem cell fate and function by engineering physical microenvironments. Integr Biol (Camb) 2012; 4:1008-18. [PMID: 23077731 PMCID: PMC3476065 DOI: 10.1039/c2ib20080e] [Citation(s) in RCA: 182] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
The phenotypic expression and function of stem cells are regulated by their integrated response to variable microenvironmental cues, including growth factors and cytokines, matrix-mediated signals, and cell–cell interactions. Recently, growing evidence suggests that matrix-mediated signals include mechanical stimuli such as strain, shear stress, substrate rigidity and topography, and these stimuli have a more profound impact on stem cell phenotypes than had previously been recognized, e.g. self-renewal and differentiation through the control of gene transcription and signaling pathways. Using a variety of cell culture models enabled by micro and nanoscale technologies, we are beginning to systematically and quantitatively investigate the integrated response of cells to combinations of relevant mechanobiological stimuli. This paper reviews recent advances in engineering physical stimuli for stem cell mechanobiology and discusses how micro- and nanoscale engineered platforms can be used to control stem cell niche environments and regulate stem cell fate and function.
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Affiliation(s)
- Kshitiz
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
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231
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Xie J, Ma B, Michael PL. Fabrication of novel 3D nanofiber scaffolds with anisotropic property and regular pores and their potential applications. Adv Healthc Mater 2012. [PMID: 23184805 DOI: 10.1002/adhm.201200100] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A new and simple approach for preparing 3D nanofiber scaffolds in a basket-weaved structure composed of uniaxially aligned, electrospun nanofiber strips is reported. It is also demonstrated that human adipose-derived stem cells seeded are distributed uniformly throughout different layers of scaffolds and can proliferate and be organized by the nanotopographic cues imparted by uniaxial arrays of nanofiber.
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Affiliation(s)
- Jingwei Xie
- Marshall Institute for Interdisciplinary Research and Center for Diagnostic Nanosystems, Marshall University, Huntington, WV 25575, USA.
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232
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Tan A, Rajadas J, Seifalian AM. Biochemical engineering nerve conduits using peptide amphiphiles. J Control Release 2012; 163:342-52. [PMID: 22910143 DOI: 10.1016/j.jconrel.2012.08.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/05/2012] [Accepted: 08/07/2012] [Indexed: 12/30/2022]
Abstract
Peripheral nerve injury is a debilitating condition. The gold standard for treatment is surgery, requiring an autologous nerve graft. Grafts are harvested from another part of the body (a secondary site) to treat the affected primary area. However, autologous nerve graft harvesting is not without risks, with associated problems including injury to the secondary site. Research into biomaterials has engendered the use of bioartificial nerve conduits as an alternative to autologous nerve grafts. These include synthetic and artificial materials, which can be manufactured into nerve conduits using techniques inspired by nanotechnology. Recent evidence indicates that peptide amphiphiles (PAs) are promising candidates for use as materials for bioengineering nerve conduits. PAs are biocompatible and biodegradable protein-based nanomaterials, capable of self-assembly in aqueous solutions. Their self-assembly system, coupled with their intrinsic capacity for carrying bioactive epitopes for tissue regeneration, form particularly novel attributes for biochemically-engineered materials. Furthermore, PAs can function as biomimetic materials and advanced drug delivery platforms for sustained and controlled release of a plethora of therapeutic agents. Here we review the realm of nerve conduit tissue engineering and the potential for PAs as viable materials in this exciting and rapidly advancing field.
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Affiliation(s)
- Aaron Tan
- Centre for Nanotechnology & Regenerative Medicine, UCL Division of Surgery & Interventional Science, University College London, London, UK
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233
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Kim K, An HJ, Jun SH, Kim TJ, Lim SA, Park G, Na HB, Park YI, Hyeon T, Yee C, Bluestone JA, Kim J, Lee KM. Single step isolation and activation of primary CD3+ T lymphocytes using alcohol-dispersed electrospun magnetic nanofibers. NANO LETTERS 2012; 12:4018-4024. [PMID: 22784189 DOI: 10.1021/nl301388d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Electrospun polymer nanofibers with entrapped magnetic nanoparticles (magnetic NP-NF) represent a novel scaffold substrate that can be functionalized for single-step isolation and activation of specific lymphocyte subsets. Using a surface-embedded T cell receptor ligand/trigger (anti-CD3 monoclonal antibody), we demonstrate, as proof of principle, the use of magnetic NP-NF to specifically isolate, enrich, and activate CD3(+) T cells from a heterogeneous cell mixture, leading to preferential expansion of CD8(+)CD3(+) T cells. The large surface area, adjustable antibody density, and embedded paramagnetic properties of the NP-NF permitted enhanced activation and expansion; its use represents a strategy that is amenable to an efficient selection process for adoptive cellular therapy as well as for the isolation of other cellular subsets for downstream translational applications.
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Affiliation(s)
- Kwanghee Kim
- Global Research Lab, Department of Biochemistry and Molecular Biology, Korea University College of Medicine, Seoul 136-713, Korea
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234
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Kueh JLL, Li D, Raisman G, Jenkins D, Li Y, Stevens R. Directionality and bipolarity of olfactory ensheathing cells on electrospun nanofibers. Nanomedicine (Lond) 2012; 7:1211-24. [DOI: 10.2217/nnm.11.180] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Aim: As a preliminary to the construction of olfactory ensheathing cells (OECs) bearing scaffold for bridging larger lesions in the spinal cord, we have investigated the response of purified cultured OECs to nanoscale fibers of varying diameter using US FDA-approved, biodegradable poly(lactic-co-glycolic-acid). Materials & methods: Conventional electrospinning produced fibers of approximately 700 nm diameter (nano-700) while nanocomposite electrospinning with quantum dots produced significantly more uniform fibers of a reduced diameter to approximately 237 nm (nano-250). OECs from adult rat were FACS purified, cultured at low density on either a flat surface or a meshwork of randomly orientated nano-700 and nano-250 fibers, and assessed using cytomorphometric analysis of immunofluorescent confocal images and by scanning electron microscopy. Results & conclusion: Compared with a flat surface, culture on a nano-700 mesh increases cell attachment. Cells change from rounded to stellate forms in random orientation. Further size reduction to the nano-250 favors bipolarity in cells with unidirectional orientation as observed in the case when transplanted OECs were used to bridge areas of damage in rat spinal cords. Original submitted 26 August 2011; Revised submitted 28 October 2011; Published online 25 May 2012
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Affiliation(s)
- Jacqueline Li-Ling Kueh
- Spinal Repair Unit, Department of Brain Repair & Rehabilitation, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Daqing Li
- Spinal Repair Unit, Department of Brain Repair & Rehabilitation, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Geoffrey Raisman
- Spinal Repair Unit, Department of Brain Repair & Rehabilitation, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Derek Jenkins
- Micro & Nanotechnology Centre, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
| | - Ying Li
- Spinal Repair Unit, Department of Brain Repair & Rehabilitation, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Robert Stevens
- Micro & Nanotechnology Centre, Science & Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science & Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK
- School of Science & Technology, Nottingham Trent University, Nottingham, UK
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235
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Low WC, Yau WWY, Stanton LW, Marcy G, Goh E, Chew SY. Directing neuronal differentiation of primary neural progenitor cells by gene knockdown approach. DNA Cell Biol 2012; 31:1148-60. [PMID: 22339269 PMCID: PMC3391493 DOI: 10.1089/dna.2011.1557] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Revised: 01/10/2012] [Accepted: 01/12/2012] [Indexed: 01/07/2023] Open
Abstract
Directing differentiation of neural stem/progenitor cells (NPCs) to produce functional neurons is a promising remedy for neural pathological conditions. The major challenge, however, lies in the effective and efficient generation of a sizable population of neurons. A potential strategy is to incorporate RNA interference (RNAi) during directed stem cell differentiation to recapitulate the complex cell-signaling cascades that often occurs during the process. In this study, in vitro silencing of RE1-silencing transcription factor (REST) was carried out using small-interfering RNAs (siRNAs) to evaluate the efficacy of combining REST knockdown with conventional differentiation approaches to enhance neurogenesis. While earlier studies have demonstrated enhanced neuronal lineage commitment from embryonic stem cells and mesenchymal stem cells upon REST knockdown, the effects of REST silencing during other stages of neural development have not been extensively evaluated. We hypothesize that REST knockdown would enhance NPC development to mature neurons and that induced REST silencing can serve as a potential biochemical approach to direct cell fate. Under nonspecific induction conditions, REST knockdown induced eightfold higher Tuj1 mRNA expression at day 14 compared with untransfected cells and cells subjected to scrambled-siRNA treatment (controls). Immunostaining also revealed greater percentage of Tuj1 positive cells with REST knockdown. Combined with neuronal induction, REST silencing enhanced the kinetics of neuronal differentiation and the rate of maturation of committed neuronal cells. Specifically, upregulation of MAP2 occurred as early as 3 days after induction with REST silencing and the expression was comparable to the controls at day 14. Likewise, downregulation of REST generated more than twice the percentage of Tuj1 and MAP2 positive cells compared with controls at day 5 (p<0.05). Morphologically, REST-silencing enhanced the number and length of neurite extensions from Tuj1 positive cells (p<0.05), which was not evaluated in previous differentiation studies with REST knockdown. Taken together, these results demonstrate the efficacy of combining REST silencing during directed NPC differentiation to enhance the rate of differentiation and subsequent maturation of NPCs. This study also highlights the potential of RNAi as a biomedical strategy for guided stem cell differentiation.
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Affiliation(s)
- Wei Ching Low
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Winifred Wing Yiu Yau
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
| | - Lawrence W. Stanton
- Stem Cell and Developmental Biology Group, Genome Institute of Singapore, Singapore, Singapore
| | - Guillaume Marcy
- Duke-NUS Graduate Medical School, National University of Singapore, Singapore, Singapore
| | - Eyleen Goh
- Duke-NUS Graduate Medical School, National University of Singapore, Singapore, Singapore
| | - Sing Yian Chew
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
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236
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Kim DH, Provenzano PP, Smith CL, Levchenko A. Matrix nanotopography as a regulator of cell function. ACTA ACUST UNITED AC 2012; 197:351-60. [PMID: 22547406 PMCID: PMC3341161 DOI: 10.1083/jcb.201108062] [Citation(s) in RCA: 414] [Impact Index Per Article: 34.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The architecture of the extracellular matrix (ECM) directs cell behavior by providing spatial and mechanical cues to which cells respond. In addition to soluble chemical factors, physical interactions between the cell and ECM regulate primary cell processes, including differentiation, migration, and proliferation. Advances in microtechnology and, more recently, nanotechnology provide a powerful means to study the influence of the ECM on cell behavior. By recapitulating local architectures that cells encounter in vivo, we can elucidate and dissect the fundamental signal transduction pathways that control cell behavior in critical developmental, physiological, and pathological processes.
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Affiliation(s)
- Deok-Ho Kim
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA.
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237
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Wang X, He J, Wang Y, Cui FZ. Hyaluronic acid-based scaffold for central neural tissue engineering. Interface Focus 2012; 2:278-91. [PMID: 23741606 PMCID: PMC3363026 DOI: 10.1098/rsfs.2012.0016] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Accepted: 02/20/2012] [Indexed: 12/17/2022] Open
Abstract
Central nervous system (CNS) regeneration with central neuronal connections and restoration of synaptic connections has been a long-standing worldwide problem and, to date, no effective clinical therapies are widely accepted for CNS injuries. The limited regenerative capacity of the CNS results from the growth-inhibitory environment that impedes the regrowth of axons. Central neural tissue engineering has attracted extensive attention from multi-disciplinary scientists in recent years, and many studies have been carried out to develop cell- and regeneration-activating biomaterial scaffolds that create an artificial micro-environment suitable for axonal regeneration. Among all the biomaterials, hyaluronic acid (HA) is a promising candidate for central neural tissue engineering because of its unique physico-chemical and biological properties. This review attempts to outline current biomaterials-based strategies for CNS regeneration from a tissue engineering point of view and discusses the main progresses in research of HA-based scaffolds for central neural tissue engineering in detail.
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Affiliation(s)
- Xiumei Wang
- Institute for Regenerative Medicine and Biomimetic Materials, State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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238
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Cooper A, Leung M, Zhang M. Polymeric Fibrous Matrices for Substrate-Mediated Human Embryonic Stem Cell Lineage Differentiation. Macromol Biosci 2012; 12:882-92. [DOI: 10.1002/mabi.201100269] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Revised: 09/16/2011] [Indexed: 12/30/2022]
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239
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Chen W, Villa-Diaz LG, Sun Y, Weng S, Kim JK, Lam RHW, Han L, Fan R, Krebsbach PH, Fu J. Nanotopography influences adhesion, spreading, and self-renewal of human embryonic stem cells. ACS NANO 2012; 6:4094-103. [PMID: 22486594 PMCID: PMC3358529 DOI: 10.1021/nn3004923] [Citation(s) in RCA: 244] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Human embryonic stem cells (hESCs) have great potentials for future cell-based therapeutics. However, their mechanosensitivity to biophysical signals from the cellular microenvironment is not well characterized. Here we introduced an effective microfabrication strategy for accurate control and patterning of nanoroughness on glass surfaces. Our results demonstrated that nanotopography could provide a potent regulatory signal over different hESC behaviors, including cell morphology, adhesion, proliferation, clonal expansion, and self-renewal. Our results indicated that topological sensing of hESCs might include feedback regulation involving mechanosensory integrin-mediated cell-matrix adhesion, myosin II, and E-cadherin. Our results also demonstrated that cellular responses to nanotopography were cell-type specific, and as such, we could generate a spatially segregated coculture system for hESCs and NIH/3T3 fibroblasts using patterned nanorough glass surfaces.
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Affiliation(s)
- Weiqiang Chen
- Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Luis G. Villa-Diaz
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yubing Sun
- Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Shinuo Weng
- Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jin Koo Kim
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Raymond H. W. Lam
- Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong
| | - Lin Han
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
| | - Rong Fan
- Department of Biomedical Engineering, Yale University, New Haven, CT 06511, USA
| | - Paul H. Krebsbach
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Jianping Fu
- Integrated Biosystems and Biomechanics Laboratory, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
- Correspondence should be addressed to J. Fu [J. Fu (, Tel: 01-734-615-7363, Fax: 01-734-647-7303)]
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240
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Development of novel electrospun absorbable polycaprolactone (PCL) scaffolds for hernia repair applications. Surg Endosc 2012; 26:2717-28. [PMID: 22538673 DOI: 10.1007/s00464-012-2258-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 03/10/2012] [Indexed: 12/26/2022]
Abstract
INTRODUCTION Permanent/nonresorbable hernia repair materials rely on profibrotic wound healing, and repair sites are commonly composed of disorganized tissue with inferior mechanical strength and risk of reherniation. Resorbable electrospun scaffolds represent a novel class of biomaterials, which may provide a unique platform for the design of advanced soft tissue repair materials. These materials are simple, inexpensive, nonwoven materials composed of polymer fibers that readily mimic the natural extracellular matrix. The primary goal of the present study was to evaluate the physiomechanical properties of novel electrospun scaffolds to determine their suitability for hernia repair. Based on previous experimentation, scaffolds possessing ≥ 20 N suture retention strength, ≥ 20 N tear resistance, and ≥ 50 N/cm tensile strength are appropriate for hernia repair. METHODS Six novel electrospun scaffolds were fabricated by varying combinations of polymer concentration (10-12 %) and flow rate (3.5-10 mL/h). Briefly, poly(ε-caprolactone) (PCL) was dissolved in a solvent mixture and electrospun onto a planar metal collector, yielding sheets with randomly oriented fibers. Physiomechanical properties were evaluated through scanning electron microscopy, laser micrometry, and mechanical testing. RESULTS Scanning electron micrographs demonstrated fiber diameters ranging from 1.0 ± 0.1 μm (10 % PCL, 3.5 mL/h) to 1.5 ± 0.2 μm (12 % PCL, 4 mL/h). Laser micrometry demonstrated thicknesses ranging from 0.72 ± 0.07 mm (12 % PCL, 10 mL/h) to 0.91 ± 0.05 mm (10 % PCL, 3.5 mL/h). Mechanical testing identified two scaffolds possessing suture retention strengths ≥ 20 N (12 % PCL, 10 mL/h and 12 % PCL, 6 mL/h), and no scaffolds possessing tear resistance values ≥ 20 N (range, 4.7 ± 0.9 N to 10.6 ± 1.8 N). Tensile strengths ranged from 35.27 ± 2.08 N/cm (10 % PCL, 3.5 mL/h) to 81.76 ± 15.85 N/cm (12 % PCL, 4 mL/h), with three scaffolds possessing strengths ≥ 50 N/cm (12 % PCL, 10 mL/h; 12 % PCL, 6 mL/h; 12 % PCL, 4 mL/h). CONCLUSIONS Two electrospun scaffolds (12 % PCL, 10 mL/h and 12 % PCL, 6 mL/h) possessed suture retention and tensile strengths appropriate for hernia repair, justifying evaluation in a large animal model. Additional studies examining advanced methods of fabrication may further improve the unique properties of these scaffolds, propelling them into applications in a variety of clinical settings.
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241
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Neural differentiation of mouse embryonic stem cells on conductive nanofiber scaffolds. Biotechnol Lett 2012; 34:1357-65. [DOI: 10.1007/s10529-012-0889-4] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2011] [Accepted: 02/21/2012] [Indexed: 12/25/2022]
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242
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García-Parra P, Cavaliere F, Maroto M, Bilbao L, Obieta I, López de Munain A, Alava JI, Izeta A. Modeling neural differentiation on micropatterned substrates coated with neural matrix components. Front Cell Neurosci 2012; 6:10. [PMID: 22435050 PMCID: PMC3303083 DOI: 10.3389/fncel.2012.00010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 02/28/2012] [Indexed: 01/28/2023] Open
Abstract
Topographical and biochemical characteristics of the substrate are critical for neuronal differentiation including axonal outgrowth and regeneration of neural circuits in vivo. Contact stimuli and signaling molecules allow neurons to develop and stabilize synaptic contacts. Here we present the development, characterization and functional validation of a new polymeric support able to induce neuronal differentiation in both PC12 cell line and adult primary skin-derived precursor cells (SKPs) in vitro. By combining a photolithographic technique with use of neural extracellular matrix (ECM) as a substrate, a biocompatible and efficient microenvironment for neuronal differentiation was developed.
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Affiliation(s)
- Patricia García-Parra
- Biomaterials-Tissue Engineering Unit, Tecnalia Research and Innovation San Sebastian, Spain
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243
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Cherry JF, Carlson AL, Benarba FL, Sommerfeld SD, Verma D, Loers G, Kohn J, Schachner M, Moghe PV. Oriented, multimeric biointerfaces of the L1 cell adhesion molecule: an approach to enhance neuronal and neural stem cell functions on 2-D and 3-D polymer substrates. Biointerphases 2012; 7:22. [PMID: 22589065 DOI: 10.1007/s13758-012-0022-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Accepted: 02/07/2012] [Indexed: 12/17/2022] Open
Abstract
This article focuses on elucidating the key presentation features of neurotrophic ligands at polymer interfaces. Different biointerfacial configurations of the human neural cell adhesion molecule L1 were established on two-dimensional films and three-dimensional fibrous scaffolds of synthetic tyrosine-derived polycarbonate polymers and probed for surface concentrations, microscale organization, and effects on cultured primary neurons and neural stem cells. Underlying polymer substrates were modified with varying combinations of protein A and poly-D-lysine to modulate the immobilization and presentation of the Fc fusion fragment of the extracellular domain of L1 (L1-Fc). When presented as an oriented and multimeric configuration from protein A-pretreated polymers, L1-Fc significantly increased neurite outgrowth of rodent spinal cord neurons and cerebellar neurons as early as 24 h compared to the traditional presentation via adsorption onto surfaces treated with poly-D-lysine. Cultures of human neural progenitor cells screened on the L1-Fc/polymer biointerfaces showed significantly enhanced neuronal differentiation and neuritogenesis on all protein A oriented substrates. Notably, the highest degree of βIII-tubulin expression for cells in 3-D fibrous scaffolds were observed in protein A oriented substrates with PDL pretreatment, suggesting combined effects of cell attachment to polycationic charged substrates with subcellular topography along with L1-mediated adhesion mediating neuronal differentiation. Together, these findings highlight the promise of displays of multimeric neural adhesion ligands via biointerfacially engineered substrates to "cooperatively" enhance neuronal phenotypes on polymers of relevance to tissue engineering.
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Affiliation(s)
- Jocie F Cherry
- Department of Biomedical Engineering, Rutgers University, 599 Taylor Road, Piscataway, NJ 08854, USA
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244
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Jiang X, Cao HQ, Shi LY, Ng SY, Stanton LW, Chew SY. Nanofiber topography and sustained biochemical signaling enhance human mesenchymal stem cell neural commitment. Acta Biomater 2012; 8:1290-302. [PMID: 22154861 DOI: 10.1016/j.actbio.2011.11.019] [Citation(s) in RCA: 101] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 10/20/2011] [Accepted: 11/14/2011] [Indexed: 11/26/2022]
Abstract
Stem cells hold great promise in enhancing nerve regeneration. In particular, human mesenchymal stem cells (MSC) represent a clinically viable cell source due in part to their abundance and accessibility. Unfortunately, current methods to direct the fate of stem cells remains largely limited to biochemical-based approaches on two-dimensional substrates with restricted efficacies. Here we have evaluated a scaffold-based approach to directing stem cell differentiation. We demonstrate the combined effects of nanofiber topography and controlled drug release on enhancing MSC neural commitment. By encapsulating up to 0.3 wt.% retinoic acid (RA) within aligned poly(ε-caprolactone) (PCL) nanofibers (average diameter ∼270 nm, AF750), sustained released of RA was obtained for at least 14 days (∼60% released). Compared with tissue culture polystyrene (TCPS), the nanofiber topography arising from plain PCL nanofibers significantly up-regulated the expressions of neural markers, Tuj-1, MAP2, GalC and RIP at the mRNA and protein levels. Combined with sustained drug availability, more significant changes in cell morphology and enhancement of neural marker expression were observed. In particular, scaffold-based controlled delivery of RA enhanced MAP2 and RIP expression compared with bolus delivery despite lower amounts of drug (>8 times lower). The generally higher expression of the mature neuronal marker MAP2 compared with glial markers at the mRNA and protein levels suggested an enhanced potential of MSC neuronal differentiation. In addition, positive staining for synaptophysin was detected only in cells cultured on aligned scaffolds in the presence of RA. Taken together, the results highlight the advantage of the scaffold-based approach in enhancing the potential of MSC neuronal differentiation and demonstrated the importance of the drug delivery approach in directing cell fate. Such biomimicking drug-encapsulating scaffolds may permit subsequent direct cell transplantation and provide guidance cues to control the fate of endogenously recruited stem cells.
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245
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Xie J, Blough ER, Wang CH. Submicron bioactive glass tubes for bone tissue engineering. Acta Biomater 2012; 8:811-9. [PMID: 21945829 DOI: 10.1016/j.actbio.2011.09.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 09/02/2011] [Accepted: 09/04/2011] [Indexed: 11/27/2022]
Abstract
Herein we describe a method to fabricate submicron bioactive glass tubes using sol-gel and coaxial electrospinning techniques for applications in bone tissue engineering. Heavy mineral oil and gel solution were delivered by two independent syringe pumps during the coaxial electrospinning process. Subsequently, submicron bioactive glass tubes were obtained by removal of poly(vinyl pyrrolidone) and heavy mineral oil via calcination at 600 °C for 5 h. Tubular structure was confirmed by scanning electron microscopy and transmission electron microscopy imaging. We examined the bioactivity of submicron bioactive glass tubes and fibers and evaluated their biocompatibility, using electrospun poly(ε-caprolactone) fibers--a bioinactive material--for comparison. The bioactivity of the glass tubes was examined in a simulated body fluid and they demonstrated the formation of hydroxyapatite-like minerals on both the outer and inner surfaces. In contrast, mineralization only occurred on their surface for bioactive glass solid fibers. Energy-dispersive X-ray data suggested that the bioactive glass tubes had a faster induction of mineral formation than the solid fibers. We demonstrate that the proliferation rate of mouse preosteoblastic MC3T3-E1 cells on bioactive glass tubes was comparable to that on solid fibers. We also show that bioactive glass tubes can be loaded with a model protein drug, bovine serum albumin, and that these structures exhibit delayed release properties. The bioactivity of released lysozyme can be as high as 90.9%. Taken together, these data suggest that submicron bioactive glass tubes could hold great potential for use in bone tissue engineering as well as topical drug or gene delivery.
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246
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Xie J, Michael PL, Zhong S, Ma B, MacEwan MR, Lim CT. Mussel inspired protein-mediated surface modification to electrospun fibers and their potential biomedical applications. J Biomed Mater Res A 2012; 100:929-38. [PMID: 22275174 DOI: 10.1002/jbm.a.34030] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 11/01/2011] [Accepted: 11/03/2011] [Indexed: 01/18/2023]
Abstract
Mussel inspired proteins have been demonstrated to serve as a versatile biologic adhesive with numerous applications. The present study illustrates the use of such Mussel inspired proteins (polydopamine) in the fabrication of functionalized bio-inspired nanomaterials capable of both improving cell response and sustained delivery of model probes. X-ray photoelectron spectroscopy analysis confirmed the ability of dopamine to polymerize on the surface of plasma-treated, electrospun poly(ε-caprolactone) (PCL) fiber mats to form polydopamine coating. Transmission electron microscopy images demonstrated that self-polymerization of dopamine was induced by pH shift and that the thickness of polydopamine coating was readily modulated by adjusting the concentration of dopamine and reaction time. Polydopamine coatings were noted to affect the mechanical properties of underlying fiber mats, as mechanical testing demonstrated a decrease in elasticity and increase in stiffness of polydopamine-coated fiber mats. Polydopamine coatings were also utilized to effectively immobilize extracellular matrix proteins (i.e., fibronectin) on the surface of polydopamine-coated, electrospun fibers, resulting in enhancement of NIH3T3 cell attachment, spreading, and cytoskeletal development. Comparison of release rates of rhodamine 6G encapsulated in coated and uncoated PCL fibers also confirmed that polydopamine coatings modulate the release rate of loaded payloads. The authors further demonstrate the significant difference of rhodamine 6G adsorption kinetics in water between PCL fibers and polydopamine-coated PCL fibers. Taken together, polydopamine-mediated surface modification to electrospun fibers may be an effective means of fabricating a wide range of bio-inspired nanomaterials with unique properties for use in tissue engineering, drug delivery, and advanced biomedical applications.
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Affiliation(s)
- Jingwei Xie
- Marshall Institute for Interdisciplinary Research and Center for Diagnostic Nanosystems, Marshall University, Huntington, West Virginia 25755, USA.
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Lü LX, Wang YY, Mao X, Xiao ZD, Huang NP. The effects of PHBV electrospun fibers with different diameters and orientations on growth behavior of bone-marrow-derived mesenchymal stem cells. Biomed Mater 2012; 7:015002. [PMID: 22262727 DOI: 10.1088/1748-6041/7/1/015002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Microenvironments in which cells live play an important role in the attachment, growth and interactions of cells. To mimic the natural structure of extracellular matrices, electrospinning was applied to fabricate biomaterials into ultrafine fibers. Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), a biocompatible and biodegradable polyester, has been shown to be an excellent biomaterial candidate for tissue engineering. In this study, five types of PHBV fibrous scaffolds with different diameters and orientations were obtained by changing solvents, concentration of electrospun solution and collector. Three kinds of scaffolds with good continuity and suitable mechanical properties, selected according to the morphology and mechanical properties of the scaffolds, were used for studying the influence of fiber diameter and orientation on growth behavior of bone-marrow-derived mesenchymal stem cells (MSCs). The results indicated that the random-oriented nanofibrous scaffold is most favorable for cell growth compared to other scaffolds, while the microfibrous scaffold resulted in the lowest viability of MSCs. The orientation of nanofibers showed a distinct effect on cell morphology by guiding cell skeleton extension. Both the random-oriented and aligned PHBV nanofibrous scaffolds showed to be good candidates for applications in tissue engineering.
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Affiliation(s)
- Lan-Xin Lü
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, People's Republic of China
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248
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Liu W, Thomopoulos S, Xia Y. Electrospun nanofibers for regenerative medicine. Adv Healthc Mater 2012; 1:10-25. [PMID: 23184683 PMCID: PMC3586336 DOI: 10.1002/adhm.201100021] [Citation(s) in RCA: 328] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2011] [Indexed: 12/11/2022]
Abstract
This Progress Report reviews recent progress in applying electrospun nanofibers to the emerging field of regenerative medicine. It begins with a brief introduction to electrospinning and nanofibers, with a focus on issues related to the selection of materials, incorporation of bioactive molecules, degradation characteristics, control of mechanical properties, and facilitation of cell infiltration. Next, a number of approaches to fabricate scaffolds from electrospun nanofibers are discussed, including techniques for controlling the alignment of nanofibers and for producing scaffolds with complex architectures. The article also highlights applications of the nanofiber-based scaffolds in four areas of regenerative medicine that involve nerves, dural tissues, tendons, and the tendon-to-bone insertion site. The Progress Report concludes with perspectives on challenges and future directions for design, fabrication, and utilization of scaffolds based on electrospun nanofibers.
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Affiliation(s)
- Wenying Liu
- Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130 (USA)
| | - Stavros Thomopoulos
- Department of Orthopaedic Surgery, Washington University School of Medicine, St. Louis, MO 63110 (USA). Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130 (USA)
| | - Younan Xia
- Department of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO 63130 (USA)
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Wang J, Ye R, Wei Y, Wang H, Xu X, Zhang F, Qu J, Zuo B, Zhang H. The effects of electrospun TSF nanofiber diameter and alignment on neuronal differentiation of human embryonic stem cells. J Biomed Mater Res A 2011; 100:632-45. [PMID: 22213384 DOI: 10.1002/jbm.a.33291] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2011] [Revised: 09/11/2011] [Accepted: 10/03/2011] [Indexed: 12/17/2022]
Abstract
Although transplantation of human embryonic stem cells (hESCs)-derived neural precursors (NPs) has been demonstrated with some success for nervous repair in small animal model, control of the survival, and directional differentiation of these cells is still challenging. Meanwhile, the notion that using suitable scaffolding materials to control the growth and differentiation of grafted hESC-derived NPs raises the hope for better clinical nervous repair. In this study, we cultured hESC-derived NPs on Tussah silk fibroin (TSF)-scaffold of different diameter (i.e., 400 and 800 nm) and orientation (i.e., random and aligned) to analyze the effect of fiber diameter and alignment on the cell viability, neuronal differentiation, and neurite outgrowth of hESC-derived NPs. The results show that TSF-scaffold supports the survival, migration, and differentiation of hESC-derived NPs. Aligned TSF-scaffold significantly promotes the neuronal differentiation and neurite outgrowth of hESC-derived neurons compared with random TSF-scaffold. Moreover, on aligned 400 nm fibers cell viability, neuronal differentiation and neurite outgrowth are greater than that on aligned 800 nm fibers. Together, these results demonstrate that aligned 400 nm TSF-scaffold is more suitable for the development of hESC-derived NPs, which shed light on optimization of the therapeutic potential of hESCs to be employed for neural regeneration.
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Affiliation(s)
- Junxia Wang
- Department of Cell Biology, Medical College of Soochow University, Jiangsu Key Laboratory of Stem Cell Research, Ren Ai Road 199, Suzhou Industrial Park, Suzhou 215123, China
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Massumi M, Abasi M, Babaloo H, Terraf P, Safi M, Saeed M, Barzin J, Zandi M, Soleimani M. The effect of topography on differentiation fates of matrigel-coated mouse embryonic stem cells cultured on PLGA nanofibrous scaffolds. Tissue Eng Part A 2011; 18:609-20. [PMID: 21981309 DOI: 10.1089/ten.tea.2011.0368] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Due to pluripotency of embryonic stem (ES) cells, these cells are an invaluable in vitro model that investigates the influence of different physical and chemical cues on differentiation/development pathway of specialized cells. We sought the effect of roughness and alignment, as topomorpholocial properties of scaffolds on differentiation of green fluorescent protein-expressing ES (GFP-ES) cells into three germ layers derivates simultaneously. Furthermore, the effect of Matrigel as a natural extracellular matrix in combination with poly(lactic-co-glycolic acid) (PLGA) nanofibrous scaffolds on differentiation of mouse ES cells has been investigated. The PLGA nanofibrous scaffolds with different height and distribution of roughness and alignments were fabricated. Then, the different cell differentiation fats of GFP-ES cells plated on PLGA and PLGA/Matrigel scaffolds were analyzed by gene expression profiling. The findings demonstrated that distinct ranges of roughness, height, and distribution can support/promote a specific cell differentiation fate on scaffolds. Coating of scaffolds with Matrigel has a synergistic effect in differentiation of mesoderm-derived cells and germ cells from ES cells, whereas it inhibits the derivation of endodermal cell lineages. It was concluded that the topomorpholocial cues such as roughness and alignment should be considered in addition to other scaffolds properties to design an efficient electrospun scaffold for specific tissue engineering.
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Affiliation(s)
- Mohammad Massumi
- Department of Animal and Marine Biotechnology, National Institute of Genetic Engineering and Biotechnology, Tehran, Iran.
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