1
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Zizhou R, Wang X, Houshyar S. Review of Polymeric Biomimetic Small-Diameter Vascular Grafts to Tackle Intimal Hyperplasia. ACS OMEGA 2022; 7:22125-22148. [PMID: 35811906 PMCID: PMC9260943 DOI: 10.1021/acsomega.2c01740] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 06/03/2022] [Indexed: 06/15/2023]
Abstract
Small-diameter artificial vascular grafts (SDAVG) are used to bypass blood flow in arterial occlusive diseases such as coronary heart or peripheral arterial disease. However, SDAVGs are plagued by restenosis after a short while due to thrombosis and the thickening of the neointimal wall known as intimal hyperplasia (IH). The specific causes of IH have not yet been deduced; however, thrombosis formation due to bioincompatibility as well as a mismatch between the biomechanical properties of the SDAVG and the native artery has been attributed to its initiation. The main challenges that have been faced in fabricating SDAVGs are facilitating rapid re-endothelialization of the luminal surface of the SDAVG and replicating the complex viscoelastic behavior of the arteries. Recent strategies to combat IH formation have been mostly based on imitating the natural structure and function of the native artery (biomimicry). Thus, most recently, developed grafts contain a multilayered structure with a designated function for each layer. This paper reviews the current polymeric, biomimetic SDAVGs in preventing the formation of IH. The materials used in fabrication, challenges, and strategies employed to tackle IH are summarized and discussed, and we focus on the multilayered structure of current SDAVGs. Additionally, the future aspects in this area are pointed out for researchers to consider in their endeavor.
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Affiliation(s)
- Rumbidzai Zizhou
- Center
for Materials Innovation and Future Fashion (CMIFF), School of Fashion
and Textiles, RMIT University, Brunswick 3056, Australia
| | - Xin Wang
- Center
for Materials Innovation and Future Fashion (CMIFF), School of Fashion
and Textiles, RMIT University, Brunswick 3056, Australia
| | - Shadi Houshyar
- School
of Engineering, RMIT University, Melbourne 3000, Australia
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2
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Evaluation of physicochemical properties of polycaprolactone/gelatin/polydimethylsiloxane hybrid nanofibers as potential scaffolds for elastic tissue engineering. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-04071-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Thottappillil N, Nair PD. Dual source co-electrospun tubular scaffold generated from gelatin-vinyl acetate and poly-ɛ-caprolactone for smooth muscle cell mediated blood vessel engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 114:111030. [PMID: 32994010 DOI: 10.1016/j.msec.2020.111030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 04/09/2020] [Accepted: 04/27/2020] [Indexed: 01/01/2023]
Affiliation(s)
- Neelima Thottappillil
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, India
| | - Prabha D Nair
- Division of Tissue Engineering and Regeneration Technologies, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Thiruvananthapuram 695012, India.
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4
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Katsimpoulas M, Morticelli L, Gontika I, Kouvaka A, Mallis P, Dipresa D, Böer U, Soudah B, Haverich A, Michalopoulos E, Korossis S. Biocompatibility and Immunogenicity of Decellularized Allogeneic Aorta in the Orthotopic Rat Model. Tissue Eng Part A 2019; 25:399-415. [PMID: 30582419 DOI: 10.1089/ten.tea.2018.0037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The generation of a small-caliber arterial graft, utilizing a large vessel of a small animal, such as the aorta of the rat or rabbit, for clinical use in the peripheral arterial tree, can widen the options for arterial prostheses. This in vivo study demonstrated the ability of the decellularization protocol that was used to produce a noncytotoxic acellular small-caliber arterial graft, with sufficient biomechanical and biological integrity to withstand the demanding flow and pressure environment of the rat aorta. This work also demonstrated the superiority of the decellularized homograft over its intact counterpart, in terms of lower immunogenicity.
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Affiliation(s)
- Michalis Katsimpoulas
- 1 Centre of Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, Athens, Greece
- 2 Attikon Animal Hospital, Paiania, Greece
| | - Lucrezia Morticelli
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Ioanna Gontika
- 4 Hellenic Cord Blood Bank, Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - Artemis Kouvaka
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Panagiotis Mallis
- 4 Hellenic Cord Blood Bank, Biomedical Research Foundation Academy of Athens, Athens, Greece
| | - Daniele Dipresa
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Ulrike Böer
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - Bisharah Soudah
- 5 Institute for Pathology, Hannover Medical School, Hannover, Germany
| | - Axel Haverich
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
- 6 Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | | | - Sotirios Korossis
- 3 Lower Saxony Centre for Biomedical Engineering Implant Research and Development, Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
- 6 Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
- 7 Cardiopulmonary Regenerative (CARE) Group, Centre for Biological Engineering, Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, United Kingdom
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5
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Sorushanova A, Delgado LM, Wu Z, Shologu N, Kshirsagar A, Raghunath R, Mullen AM, Bayon Y, Pandit A, Raghunath M, Zeugolis DI. The Collagen Suprafamily: From Biosynthesis to Advanced Biomaterial Development. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1801651. [PMID: 30126066 DOI: 10.1002/adma.201801651] [Citation(s) in RCA: 498] [Impact Index Per Article: 99.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 06/03/2018] [Indexed: 05/20/2023]
Abstract
Collagen is the oldest and most abundant extracellular matrix protein that has found many applications in food, cosmetic, pharmaceutical, and biomedical industries. First, an overview of the family of collagens and their respective structures, conformation, and biosynthesis is provided. The advances and shortfalls of various collagen preparations (e.g., mammalian/marine extracted collagen, cell-produced collagens, recombinant collagens, and collagen-like peptides) and crosslinking technologies (e.g., chemical, physical, and biological) are then critically discussed. Subsequently, an array of structural, thermal, mechanical, biochemical, and biological assays is examined, which are developed to analyze and characterize collagenous structures. Lastly, a comprehensive review is provided on how advances in engineering, chemistry, and biology have enabled the development of bioactive, 3D structures (e.g., tissue grafts, biomaterials, cell-assembled tissue equivalents) that closely imitate native supramolecular assemblies and have the capacity to deliver in a localized and sustained manner viable cell populations and/or bioactive/therapeutic molecules. Clearly, collagens have a long history in both evolution and biotechnology and continue to offer both challenges and exciting opportunities in regenerative medicine as nature's biomaterial of choice.
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Affiliation(s)
- Anna Sorushanova
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Luis M Delgado
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Zhuning Wu
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Naledi Shologu
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Aniket Kshirsagar
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Rufus Raghunath
- Centre for Cell Biology and Tissue Engineering, Competence Centre Tissue Engineering for Drug Development (TEDD), Department Life Sciences and Facility Management, Institute for Chemistry and Biotechnology (ICBT), Zürich University of Applied Sciences, Wädenswil, Switzerland
| | | | - Yves Bayon
- Sofradim Production-A Medtronic Company, Trevoux, France
| | - Abhay Pandit
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Michael Raghunath
- Centre for Cell Biology and Tissue Engineering, Competence Centre Tissue Engineering for Drug Development (TEDD), Department Life Sciences and Facility Management, Institute for Chemistry and Biotechnology (ICBT), Zürich University of Applied Sciences, Wädenswil, Switzerland
| | - Dimitrios I Zeugolis
- Regenerative, Modular and Developmental Engineering Laboratory (REMODEL), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
- Science Foundation Ireland (SFI) Centre for Research in Medical Devices (CÚRAM), Biomedical Sciences Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
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6
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Shen W, Das S, Vitale F, Richardson A, Ananthakrishnan A, Struzyna LA, Brown DP, Song N, Ramkumar M, Lucas T, Cullen DK, Litt B, Allen MG. Microfabricated intracortical extracellular matrix-microelectrodes for improving neural interfaces. MICROSYSTEMS & NANOENGINEERING 2018; 4:30. [PMID: 31057918 PMCID: PMC6220172 DOI: 10.1038/s41378-018-0030-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 05/30/2018] [Accepted: 08/05/2018] [Indexed: 05/30/2023]
Abstract
Intracortical neural microelectrodes, which can directly interface with local neural microcircuits with high spatial and temporal resolution, are critical for neuroscience research, emerging clinical applications, and brain computer interfaces (BCI). However, clinical applications of these devices remain limited mostly by their inability to mitigate inflammatory reactions and support dense neuronal survival at their interfaces. Herein we report the development of microelectrodes primarily composed of extracellular matrix (ECM) proteins, which act as a bio-compatible and an electrochemical interface between the microelectrodes and physiological solution. These ECM-microelectrodes are batch fabricated using a novel combination of micro-transfer-molding and excimer laser micromachining to exhibit final dimensions comparable to those of commercial silicon-based microelectrodes. These are further integrated with a removable insertion stent which aids in intracortical implantation. Results from electrochemical models and in vivo recordings from the rat's cortex indicate that ECM encapsulations have no significant effect on the electrochemical impedance characteristics of ECM-microelectrodes at neurologically relevant frequencies. ECM-microelectrodes are found to support a dense layer of neuronal somata and neurites on the electrode surface with high neuronal viability and exhibited markedly diminished neuroinflammation and glial scarring in early chronic experiments in rats.
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Affiliation(s)
- Wen Shen
- Krishna P. Singh Center for Nanotechnology, University of Pennsylvania, Philadelphia, PA 19104 USA
- Present Address: Department of Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX 76019 USA
| | - Suradip Das
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Flavia Vitale
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Andrew Richardson
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Akshay Ananthakrishnan
- Department of Mechanical Engineering and Applied Mechanics, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Laura A. Struzyna
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Daniel P. Brown
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Naixin Song
- Department of Electrical and Systems Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Murari Ramkumar
- Department of Materials Science and Engineering, School of Engineering and Applied Science, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Timothy Lucas
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - D. Kacy Cullen
- Department of Neurosurgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Brian Litt
- Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104 USA
| | - Mark G. Allen
- Krishna P. Singh Center for Nanotechnology, University of Pennsylvania, Philadelphia, PA 19104 USA
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7
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Antmen E, Ermis M, Demirci U, Hasirci V. Engineered natural and synthetic polymer surfaces induce nuclear deformation in osteosarcoma cells. J Biomed Mater Res B Appl Biomater 2018; 107:366-376. [DOI: 10.1002/jbm.b.34128] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 02/22/2018] [Accepted: 03/14/2018] [Indexed: 01/25/2023]
Affiliation(s)
- Ezgi Antmen
- BIOMATEN, Middle East Technical University (METU); Center of Excellence in Biomaterials and Tissue Engineering; Ankara Turkey
- Department of Biotechnology; Middle East Technical University; Ankara Turkey
| | - Menekse Ermis
- BIOMATEN, Middle East Technical University (METU); Center of Excellence in Biomaterials and Tissue Engineering; Ankara Turkey
- Department of Biomedical Engineering; Middle East Technical University; Ankara Turkey
| | - Utkan Demirci
- Department of Radiology; School of Medicine, Stanford University; Palo Alto CA 94304 USA
| | - Vasif Hasirci
- BIOMATEN, Middle East Technical University (METU); Center of Excellence in Biomaterials and Tissue Engineering; Ankara Turkey
- Department of Biotechnology; Middle East Technical University; Ankara Turkey
- Department of Biomedical Engineering; Middle East Technical University; Ankara Turkey
- Department of Biological Sciences; Middle East Technical University; Ankara Turkey
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8
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Le V, Lee J, Chaterji S, Spencer A, Liu YL, Kim P, Yeh HC, Kim DH, Baker AB. Syndecan-1 in mechanosensing of nanotopological cues in engineered materials. Biomaterials 2018; 155:13-24. [PMID: 29156422 PMCID: PMC5738284 DOI: 10.1016/j.biomaterials.2017.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Accepted: 11/07/2017] [Indexed: 12/25/2022]
Abstract
The cells of the vascular system are highly sensitive to biophysical cues from their local cellular microenvironment. To engineer improved materials for vascular devices and delivery of cell therapies, a key challenge is to understand the mechanisms that cells use to sense biophysical cues from their environment. Syndecans are heparan sulfate proteoglycans (HSPGs) that consist of a protein core modified with heparan sulfate glycosaminoglycan chains. Due to their presence on the cell surface and their interaction with cytoskeletal and focal adhesion associated molecules, cell surface proteoglycans are well poised to serve as mechanosensors of the cellular microenvironment. Nanotopological cues have become recognized as major regulators of cell growth, migration and phenotype. We hypothesized that syndecan-1 could serve as a mechanosensor for nanotopological cues and can mediate the responsiveness of vascular smooth muscle cells to nanoengineered materials. We created engineered substrates made of polyurethane acrylate with nanogrooves using ultraviolet-assisted capillary force lithography. We cultured vascular smooth muscle cells with knockout of syndecan-1 on engineered substrates with varying compliance and nanotopology. We found that knockout of syndecan-1 reduced alignment of vascular smooth muscle cells to the nanogrooves under inflammatory treatments. In addition, we found that loss of syndecan-1 increased nuclear localization of Yap/Taz and phospho-Smad2/3 in response to nanogrooves. Syndecan-1 knockout vascular smooth muscle cells also had elevated levels of Rho-associated protein kinase-1 (Rock1), leading to increased cell stiffness and an enhanced contractile state in the cells. Together, our findings support that syndecan-1 knockout leads to alterations in mechanosensing of nanotopographical cues through alterations of in rho-associated signaling pathways, cell mechanics and mediators of the Hippo and TGF-β signaling pathways.
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Affiliation(s)
- Victoria Le
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Jason Lee
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Somali Chaterji
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Adrianne Spencer
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Yen-Liang Liu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Peter Kim
- University of Washington, Department of Bioengineering, Seattle, WA, USA
| | - Hsin-Chih Yeh
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA
| | - Deok-Ho Kim
- University of Washington, Department of Bioengineering, Seattle, WA, USA
| | - Aaron B Baker
- Department of Biomedical Engineering, University of Texas at Austin, Austin, TX, USA; Institute for Cellular and Molecular Biology, University of Texas at Austin, Austin, TX, USA; Institute for Biomaterials, Drug Delivery and Regenerative Medicine, University of Texas at Austin, Austin, TX, USA; Institute for Computational Engineering and Sciences, University of Texas at Austin, Austin, TX, USA.
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9
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Ma C, Qu T, Chang B, Jing Y, Feng JQ, Liu X. 3D Maskless Micropatterning for Regeneration of Highly Organized Tubular Tissues. Adv Healthc Mater 2018; 7:10.1002/adhm.201700738. [PMID: 29121452 PMCID: PMC5803393 DOI: 10.1002/adhm.201700738] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Revised: 08/04/2017] [Indexed: 12/20/2022]
Abstract
Micropatterning is a widely used powerful tool to create highly ordered microstructures on material surfaces. However, due to technical limitations, the integration of micropatterned microstructures into bioinspired 3D scaffolds to successfully regenerate well-organized functional tissues is not achieved. In this work, a unique maskless micropatterning technology is reported to create 3D nanofibrous matrices with highly organized tubular architecture for tissue regeneration. This micropatterning method is a laser-guided, noncontact, high-precision, flexible computer programming of machining process that can create highly ordered tubules with the density ranged from 1000 to 60 000 mm-2 and the size varied from 300 nm to 30 µm in the bioinspired 3D matrix. The tubular architecture presents pivotal biophysical cues to control dental pulp stem cell alignment, migration, polarization, and differentiation. More importantly, when using this 3D tubular hierarchical matrix as a scaffold, this study successfully regenerates functional tubular dentin that has the same well-organized microstructure as its natural counterpart. This 3D maskless micropattern approach represents a powerful avenue not only for the exploration of cell-material interactions in 3D, but also for the regeneration of functional tissues with well-organized microstructures.
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Affiliation(s)
- Chi Ma
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
| | - Tiejun Qu
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
| | - Bei Chang
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
| | - Yan Jing
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
| | - Jerry Q Feng
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
| | - Xiaohua Liu
- Texas A&M University College of Dentistry, 3302 Gaston Ave, Dallas, TX, 75246, USA
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10
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Makita R, Akasaka T, Tamagawa S, Yoshida Y, Miyata S, Miyaji H, Sugaya T. Preparation of micro/nanopatterned gelatins crosslinked with genipin for biocompatible dental implants. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2018; 9:1735-1754. [PMID: 29977707 PMCID: PMC6009376 DOI: 10.3762/bjnano.9.165] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 05/09/2018] [Indexed: 05/09/2023]
Abstract
Background: Collagen is a basic component of the periodontium and plays an important role in the function of the periodontal unit. Therefore, coating with collagen/gelatin has been applied to enable dental implants to positively interact with peri-implant tissues. Although the micro/nanoscale topography is an important property of the surface of dental implants, smaller collagen/gelatin surface patterns have not been sufficiently developed. Furthermore, only few reports on the behavior of cells on gelatin surfaces with different patterns and sizes exist. In this study, we developed micro/nanometer-scaled gelatin surfaces using genipin crosslinking, with the aim of understanding the use of patterning in surface modification of dental implants. Results: Grooves, holes, and pillars, with widths or diameters of 2 µm, 1 µm, or 500 nm were fabricated using a combination of molding and genipin crosslinking of gelatin. The stability of the different gelatin patterns could be controlled by the degree of genipin crosslinking. The gelatin patterns at 20 mM concentration of genipin and 41% crosslinking maintained a stable, patterned shape for at least 14 days in a cell culture medium. A cell morphology study showed that the cells on groves were aligned along the direction of the grooves. In contrast, the cells on pillars and holes exhibited randomly elongated filopodia. The vinculin spots of the cells were observed on the top of ridges and pillars or the upper surface of holes. The results of a cell attachment assay showed that the number of surface-attached cells increased with increasing patterning of the gelatin surface. Unlike the cell attachment assay, the results of a cell proliferation assay showed that Saos-2 cells prefer grooves with diameters of approximately 2 µm and 1 µm and pillars with diameters of 1 µm and heights of 500 nm. The number of cells on pillars with heights of 2 µm was larger than those of the other gelatin surface patterns tested. Conclusion: These data support that a detailed design of the gelatin surface pattern can control both cell attachment and proliferation of Saos-2 cells. Thus, gelatin surfaces patterned using genipin crosslinking are now an available option for biocompatible material patterning.
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Affiliation(s)
- Reika Makita
- Department of Periodontology and Endodontology, Graduate School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tsukasa Akasaka
- Department of Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Seiichi Tamagawa
- School of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Yasuhiro Yoshida
- Department of Biomaterials and Bioengineering, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Saori Miyata
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Hirofumi Miyaji
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
| | - Tsutomu Sugaya
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo 060-8586, Japan
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11
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Zhou S, Yang R, Zou Q, Zhang K, Yin T, Zhao W, Shapter JG, Gao G, Fu Q. Fabrication of Tissue-Engineered Bionic Urethra Using Cell Sheet Technology and Labeling By Ultrasmall Superparamagnetic Iron Oxide for Full-Thickness Urethral Reconstruction. Theranostics 2017; 7:2509-2523. [PMID: 28744331 PMCID: PMC5525753 DOI: 10.7150/thno.18833] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 04/21/2017] [Indexed: 01/18/2023] Open
Abstract
Urethral strictures remain a reconstructive challenge, due to less than satisfactory outcomes and high incidence of stricture recurrence. An “ideal” urethral reconstruction should establish similar architecture and function as the original urethral wall. We fabricated a novel tissue-engineered bionic urethras using cell sheet technology and report their viability in a canine model. Small amounts of oral and adipose tissues were harvested, and adipose-derived stem cells, oral mucosal epithelial cells, and oral mucosal fibroblasts were isolated and used to prepare cell sheets. The cell sheets were hierarchically tubularized to form 3-layer tissue-engineered urethras and labeled by ultrasmall super-paramagnetic iron oxide (USPIO). The constructed tissue-engineered urethras were transplanted subcutaneously for 3 weeks to promote the revascularization and biomechanical strength of the implant. Then, 2 cm length of the tubularized penile urethra was replaced by tissue-engineered bionic urethra. At 3 months of urethral replacement, USPIO-labeled tissue-engineered bionic urethra can be effectively detected by MRI at the transplant site. Histologically, the retrieved bionic urethras still displayed 3 layers, including an epithelial layer, a fibrous layer, and a myoblast layer. Three weeks after subcutaneous transplantation, immunofluorescence analysis showed the density of blood vessels in bionic urethra was significantly increased following the initial establishment of the constructs and was further up-regulated at 3 months after urethral replacement and was close to normal level in urethral tissue. Our study is the first to experimentally demonstrate 3-layer tissue-engineered urethras can be established using cell sheet technology and can promote the regeneration of structural and functional urethras similar to normal urethra.
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12
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Jahnavi S, Arthi N, Pallavi S, Selvaraju C, Bhuvaneshwar GS, Kumary TV, Verma RS. Nanosecond laser ablation enhances cellular infiltration in a hybrid tissue scaffold. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:190-201. [PMID: 28532021 DOI: 10.1016/j.msec.2017.03.159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/17/2017] [Accepted: 03/18/2017] [Indexed: 01/21/2023]
Abstract
Hybrid tissue engineered (HTE) scaffolds constituting polymeric nanofibers and biological tissues have attractive bio-mechanical properties. However, they suffer from small pore size due to dense overlapping nanofibers resulting in poor cellular infiltration. In this study, using nanosecond (ns) laser, we fabricated micro-scale features on Polycaprolactone (PCL)-Chitosan (CH) nanofiber layered bovine pericardium based Bio-Hybrid scaffold to achieve enhanced cellular adhesion and infiltration. The laser energy parameters such as fluence of 25J/cm2, 0.1mm instep and 15 mark time were optimized to get structured microchannels on the Bio-Hybrid scaffolds. Laser irradiation time of 40μs along with these parameters resulted in microchannel width of ~50μm and spacing of ~35μm between adjacent lines. The biochemical, thermal, hydrophilic and uniaxial mechanical properties of the Bio-Hybrid scaffolds remained comparable after laser ablation reflecting extracellular matrix (ECM) stability. Human umbilical cord mesenchymal stem cells and mouse cardiac fibroblasts seeded on these laser-ablated Bio-Hybrid scaffolds exhibited biocompatibility and increased cellular adhesion in microchannels when compared to non-ablated Bio-Hybrid scaffolds. These findings suggest the feasibility to selectively ablate polymer layer in the HTE scaffolds without affecting their bio-mechanical properties and also describe a new approach to enhance cellular infiltration in the HTE scaffolds.
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Affiliation(s)
- S Jahnavi
- Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, TN, India; Department of Engineering Design, Indian Institute of Technology Madras, Chennai 600036, TN, India
| | - N Arthi
- Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, TN, India
| | - S Pallavi
- Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, TN, India
| | - C Selvaraju
- National Centre for Ultrafast Processes, Sekkizhar Campus, University of Madras, Taramani, Chennai 600113, India
| | - G S Bhuvaneshwar
- Department of Engineering Design, Indian Institute of Technology Madras, Chennai 600036, TN, India
| | - T V Kumary
- Tissue Culture Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Poojappura, Trivandrum, Kerala 695012, India
| | - R S Verma
- Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, Indian Institute of Technology Madras, Chennai 600036, TN, India.
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13
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Gunay B, Hasirci N, Hasirci V. A cell attracting composite of lumbar fusion cage. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2017; 28:749-767. [DOI: 10.1080/09205063.2017.1301771] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Busra Gunay
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey
- Graduate Department of Biotechnology, METU, Ankara, Turkey
| | - Nesrin Hasirci
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey
- Department of Chemistry, METU, Ankara, Turkey
- Graduate Department of Biotechnology, METU, Ankara, Turkey
| | - Vasif Hasirci
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey
- Department of Biological Sciences, METU, Ankara, Turkey
- Graduate Department of Biotechnology, METU, Ankara, Turkey
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14
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A high throughput approach for analysis of cell nuclear deformability at single cell level. Sci Rep 2016; 6:36917. [PMID: 27841297 PMCID: PMC5107983 DOI: 10.1038/srep36917] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 10/12/2016] [Indexed: 01/14/2023] Open
Abstract
Various physiological and pathological processes, such as cell differentiation, migration, attachment, and metastasis are highly dependent on nuclear elasticity. Nuclear morphology directly reflects the elasticity of the nucleus. We propose that quantification of changes in nuclear morphology on surfaces with defined topography will enable us to assess nuclear elasticity and deformability. Here, we used soft lithography techniques to produce 3 dimensional (3-D) cell culture substrates decorated with micron sized pillar structures of variable aspect ratios and dimensions to induce changes in cellular and nuclear morphology. We developed a high content image analysis algorithm to quantify changes in nuclear morphology at the single-cell level in response to physical cues from the 3-D culture substrate. We present that nuclear stiffness can be used as a physical parameter to evaluate cancer cells based on their lineage and in comparison to non-cancerous cells originating from the same tissue type. This methodology can be exploited for systematic study of mechanical characteristics of large cell populations complementing conventional tools such as atomic force microscopy and nanoindentation.
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15
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Elamparithi A, Punnoose AM, Paul SFD, Kuruvilla S. Gelatin electrospun nanofibrous matrices for cardiac tissue engineering applications. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1180616] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Anuradha Elamparithi
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Chennai, India
- Department of Human Genetics, Sri Ramachandra University, Chennai, India
| | - Alan M. Punnoose
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Chennai, India
| | - Solomon F. D. Paul
- Department of Human Genetics, Sri Ramachandra University, Chennai, India
| | - Sarah Kuruvilla
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Chennai, India
- Department of Pathology, Sri Ramachandra Medical Centre, Chennai, India
- Department of Pathology, The Madras Medical Mission, Chennai, India
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16
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Komez A, Baran ET, Erdem U, Hasirci N, Hasirci V. Construction of a patterned hydrogel-fibrous mat bilayer structure to mimic choroid and Bruch's membrane layers of retina. J Biomed Mater Res A 2016; 104:2166-77. [DOI: 10.1002/jbm.a.35756] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Aylin Komez
- Middle East Technical University (METU) Graduate Department of Biotechnology; Ankara 06800 Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering; Ankara 06800 Turkey
| | - Erkan T. Baran
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering; Ankara 06800 Turkey
| | - Uzeyir Erdem
- Department of Ophthalmology; Gulhane Military Medical Faculty; Etlik Ankara 06018 Turkey
| | - Nesrin Hasirci
- Middle East Technical University (METU) Graduate Department of Biotechnology; Ankara 06800 Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering; Ankara 06800 Turkey
- METU, Department of Chemistry; Ankara 06800 Turkey
| | - Vasif Hasirci
- Middle East Technical University (METU) Graduate Department of Biotechnology; Ankara 06800 Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials & Tissue Engineering; Ankara 06800 Turkey
- Department of Biological Sciences; Ankara 06800 Turkey
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17
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Wang Z, Du Z, Chan JKY, Teoh SH, Thian ES, Hong M. Direct Laser Microperforation of Bioresponsive Surface-Patterned Films with Through-Hole Arrays for Vascular Tissue-Engineering Application. ACS Biomater Sci Eng 2015; 1:1239-1249. [DOI: 10.1021/acsbiomaterials.5b00455] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zuyong Wang
- Department
of Mechanical Engineering, National University of Singapore, 9 Engineering
Drive 1, Singapore 117576, Singapore
- Department
of Electrical and Computer Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576, Singapore
| | - Zheren Du
- Department
of Electrical and Computer Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576, Singapore
| | - Jerry Kok Yen Chan
- Department
of Reproductive Medicine, KK Women’s and Children’s Hospital, 100 Buikit Timah Road, Singapore 229899, Singapore
- Department
of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, 14 Medical Drive, Singapore 117599, Singapore
- Cancer
and Stem Cell Biology, Duke-NUS Graduate Medical School, 8 College
Road, Singapore 169857, Singapore
| | - Swee Hin Teoh
- School of
Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Eng San Thian
- Department
of Mechanical Engineering, National University of Singapore, 9 Engineering
Drive 1, Singapore 117576, Singapore
| | - Minghui Hong
- Department
of Electrical and Computer Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576, Singapore
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18
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Sayin E, Baran ET, Hasirci V. Osteogenic differentiation of adipose derived stem cells on high and low aspect ratio micropatterns. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:1402-24. [PMID: 26418723 DOI: 10.1080/09205063.2015.1100494] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Adipose derived stem cells (ADSCs) were cultured on collagen-silk fibroin films with microchannel and micropillar patterns to investigate the effects of cell morphology changes on osteogenic differentiation. Channel and pillar micropatterned films were prepared from collagen type I and silk fibroin. While higher ADSC proliferation profiles were obtained on micropillar blend film, microchannel blend films, however, caused twice higher aspect ratio and effective orientation of cells. Alkaline phosphatase activity of ADSCs was several times higher on microchannel surface when the measured activities were normalized to cell number. Effective deposition of collagen type I and mineral by the cells were observed for patterned and unpatterned films, and these extracellular matrix components were oriented along the axis of the microchannels. In conclusion, the use of collagen-fibroin blend film with microchannel topography increased the aspect ratio and alignment of cells significantly, and was also effective in the differentiation of ADSCs into osteogenic lineage.
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Affiliation(s)
- Esen Sayin
- a Department of Biotechnology , METU , Ankara 06800 , Turkey.,b BIOMATEN , METU Center of Excellence in Biomaterials and Tissue Engineering , Ankara 06800 , Turkey
| | - Erkan Türker Baran
- b BIOMATEN , METU Center of Excellence in Biomaterials and Tissue Engineering , Ankara 06800 , Turkey
| | - Vasif Hasirci
- a Department of Biotechnology , METU , Ankara 06800 , Turkey.,b BIOMATEN , METU Center of Excellence in Biomaterials and Tissue Engineering , Ankara 06800 , Turkey
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19
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Elamparithi A, Punnoose AM, Kuruvilla S. Electrospun type 1 collagen matrices preserving native ultrastructure using benign binary solvent for cardiac tissue engineering. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:1318-25. [DOI: 10.3109/21691401.2015.1029629] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Anuradha Elamparithi
- Human Genetics, Sri Ramachandra University, Porur, Chennai, India
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Porur, Chennai, India
| | - Alan M. Punnoose
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Porur, Chennai, India
| | - Sarah Kuruvilla
- Cell and Tissue Engineering Laboratory, Sri Ramachandra University, Porur, Chennai, India
- Department of Pathology, Sri Ramachandra Medical Centre, Porur, Chennai, India
- Department of Pathology, The Madras Medical Mission, Chennai, India
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20
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Elamparithi A, Punnoose AM, Kuruvilla S, Ravi M, Rao S, Paul SFD. Electrospun polycaprolactone matrices with tensile properties suitable for soft tissue engineering. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2015; 44:878-84. [PMID: 25619755 DOI: 10.3109/21691401.2014.998825] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The extracellular environment is a complex network of functional and structural components that impart chemical and mechanical stimuli that affect cellular function and fate. Cell differentiation on three dimensional scaffolds is also determined by the modulus of the substrate. Electrospun PCL nanofibers, which mimic the extra cellular matrix, have been developed with a wide variety of solvents and their combinations. The various studies have revealed that the solvents used influence the physical and mechanical properties, resulting in scaffolds with Young's modulus in the range of 1.8-15.4 MPa, more suitable for engineering of hard tissue like bone. The current study describes the use of benign binary solvent-generated fibrous scaffolds with a Young's modulus of 36.05 ± 13.08 kPa, which is almost 50 times lower than that of scaffolds derived from the commonly used solvents, characterized with myoblast, which can be further explored for applications in muscle and soft tissue engineering.
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Affiliation(s)
- Anuradha Elamparithi
- a Cell and Tissue Engineering Laboratory, Sri Ramachandra University , Chennai , India.,f Department of Human Genetics , Sri Ramachandra University , Chennai , India
| | - Alan M Punnoose
- a Cell and Tissue Engineering Laboratory, Sri Ramachandra University , Chennai , India.,b Centre for Regenerative Medicine and Stem Cell Research, Sri Ramachandra University , Chennai , India
| | - Sarah Kuruvilla
- a Cell and Tissue Engineering Laboratory, Sri Ramachandra University , Chennai , India.,c Department of Pathology , Sri Ramachandra Medical Centre , Chennai , India.,d Department of Pathology , the Madras Medical Mission , Chennai , India
| | - Maddaly Ravi
- f Department of Human Genetics , Sri Ramachandra University , Chennai , India
| | - Suresh Rao
- e Department of Periodontology , Sri Ramachandra University , Chennai , India
| | - Solomon F D Paul
- f Department of Human Genetics , Sri Ramachandra University , Chennai , India
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21
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Zhao X, Lin Y, Wang Q. Virus-based scaffolds for tissue engineering applications. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2014; 7:534-47. [DOI: 10.1002/wnan.1327] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 10/30/2014] [Accepted: 11/08/2014] [Indexed: 11/07/2022]
Affiliation(s)
- Xia Zhao
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun China
| | - Yuan Lin
- State Key Laboratory of Polymer Physics and Chemistry; Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; Changchun China
| | - Qian Wang
- Department of Chemistry and Biochemistry; University of South Carolina; Columbia SC USA
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22
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Barthes J, Özçelik H, Hindié M, Ndreu-Halili A, Hasan A, Vrana NE. Cell microenvironment engineering and monitoring for tissue engineering and regenerative medicine: the recent advances. BIOMED RESEARCH INTERNATIONAL 2014; 2014:921905. [PMID: 25143954 PMCID: PMC4124711 DOI: 10.1155/2014/921905] [Citation(s) in RCA: 133] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Accepted: 06/15/2014] [Indexed: 01/01/2023]
Abstract
In tissue engineering and regenerative medicine, the conditions in the immediate vicinity of the cells have a direct effect on cells' behaviour and subsequently on clinical outcomes. Physical, chemical, and biological control of cell microenvironment are of crucial importance for the ability to direct and control cell behaviour in 3-dimensional tissue engineering scaffolds spatially and temporally. In this review, we will focus on the different aspects of cell microenvironment such as surface micro-, nanotopography, extracellular matrix composition and distribution, controlled release of soluble factors, and mechanical stress/strain conditions and how these aspects and their interactions can be used to achieve a higher degree of control over cellular activities. The effect of these parameters on the cellular behaviour within tissue engineering context is discussed and how these parameters are used to develop engineered tissues is elaborated. Also, recent techniques developed for the monitoring of the cell microenvironment in vitro and in vivo are reviewed, together with recent tissue engineering applications where the control of cell microenvironment has been exploited. Cell microenvironment engineering and monitoring are crucial parts of tissue engineering efforts and systems which utilize different components of the cell microenvironment simultaneously can provide more functional engineered tissues in the near future.
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Affiliation(s)
- Julien Barthes
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-S 1121, “Biomatériaux et Bioingénierie”, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Hayriye Özçelik
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-S 1121, “Biomatériaux et Bioingénierie”, 11 rue Humann, 67085 Strasbourg Cedex, France
| | - Mathilde Hindié
- Equipe de Recherche sur les Relations Matrice Extracellulaire-Cellules, Université de Cergy-Pontoise, 2 Avenue Adolphe Chauvin, 95302 Cergy Pontoise, France
| | | | - Anwarul Hasan
- Biomedical Engineering and Department of Mechanical Engineering, American University of Beirut, Beirut 1107 2020, Lebanon
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Nihal Engin Vrana
- Institut National de la Santé et de la Recherche Médicale (INSERM) UMR-S 1121, “Biomatériaux et Bioingénierie”, 11 rue Humann, 67085 Strasbourg Cedex, France
- Protip SAS, 8 Place de l'Hôpital, 67000, Strasbourg, France
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23
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Özçelik H, Padeste C, Hasirci V. Systematically organized nanopillar arrays reveal differences in adhesion and alignment properties of BMSC and Saos-2 cells. Colloids Surf B Biointerfaces 2014; 119:71-81. [DOI: 10.1016/j.colsurfb.2014.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/06/2014] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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24
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Halili AN, Hasirci N, Hasirci V. A multilayer tissue engineered meniscus substitute. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:1195-1209. [PMID: 24452271 DOI: 10.1007/s10856-014-5145-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 01/10/2014] [Indexed: 06/03/2023]
Abstract
Various methods have been tried to treat the main meniscus problem, meniscal tears, for which we believe tissue engineering could be a viable solution. In this study, a three dimensional, collagen-based meniscus substitute was prepared by tissue engineering using human fibrochondrocytes and a collagen based-scaffold. This construct was made with 3 different collagen-based foams interspaced with two electrospun nano/microfibrous mats. The top layer was made of collagen type I-chondroitin sulfate-hyaluronic acid (Coll-CS-HA), and the middle and the bottom layers were made of only collagen type I with different porosities and thus with different mechanical properties. The mats of aligned fibers were a blend of collagen type I and poly(L-lactic acid-co-glycolic acid) (PLGA). After seeding with human fibrochondrocytes, cell attachment, proliferation, and production of extracellular matrix and glucoseaminoglycan were studied. Cell seeding had a positive effect on the compressive properties of foams and the 3D construct. The 3D construct with all its 5 layers had better mechanical properties than the individual foams.
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25
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Naik N, Caves J, Chaikof E, Allen MG. Generation of spatially aligned collagen fiber networks through microtransfer molding. Adv Healthc Mater 2014; 3:367-74. [PMID: 24039146 PMCID: PMC3938984 DOI: 10.1002/adhm.201300112] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 06/01/2013] [Indexed: 11/05/2022]
Abstract
The unique biomechanical properties of native tissue are governed by the organization and composition of integrated collagen and elastin networks. An approach for fabricating spatially aligned, fiber-reinforced composites with adjustable collagen fiber dimensions, layouts, and distribution within an elastin-like protein matrix yielding a biocomposite with controllable mechanical responses is reported. Microtransfer molding is employed for the fabrication of hollow and solid collagen fibers with straight or crimped fiber geometries. Collagen fibers (width: 2-50 μm, thickness: 300 nm to 3 μm) exhibit a Young's modulus of 126 ± 61 MPa and an ultimate tensile strength of 7 ± 3.2 MPa. As fiber networks within composite structures, straight fiber layouts display orthotropic responses with Young's modulus ranging from 0.95 ± 0.35 to 10.4 ± 0.5 MPa and tensile strength from 0.22 ± 0.08 to 0.87 ± 0.5 MPa with increasing fraction of collagen fibers (1-10%, v/v). In contrast, composites based on crimped fiber layouts exhibit strain-dependent stiffness with an increase in Young's modulus from 0.7 ± 0.14 MPa to 3.15 ± 0.49 MPa, at a specific transition strain. Through controlling the microstructure of engineered collagen fiber networks, a facile means is established to control macroscale mechanical responses of composite protein-based materials.
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Affiliation(s)
- Nisarga Naik
- Department of Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center Boston, MA 02115, USA, Wyss Institute of Biologically Inspired Engineering of Harvard University Boston, MA 02115, USA, School of Electrical and Computer Engineering, Georgia Institute of Technology Atlanta, GA 30332, USA
| | - Jeffrey Caves
- Department of Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center Boston, MA 02115, USA, Wyss Institute of Biologically Inspired Engineering of Harvard University Boston, MA 02115, USA
| | - Elliot Chaikof
- Department of Surgery, Harvard Medical School, Beth Israel Deaconess Medical Center Boston, MA 02115, USA, Wyss Institute of Biologically Inspired Engineering of Harvard University Boston, MA 02115, USA, Harvard Stem Cell Institute Boston, MA 02115, USA
| | - Mark G. Allen
- School of Electrical and Computer Engineering, Georgia Institute of Technology Atlanta, GA 30332, USA
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26
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Martins AM, Eng G, Caridade SG, Mano JF, Reis RL, Vunjak-Novakovic G. Electrically conductive chitosan/carbon scaffolds for cardiac tissue engineering. Biomacromolecules 2014; 15:635-43. [PMID: 24417502 PMCID: PMC3983145 DOI: 10.1021/bm401679q] [Citation(s) in RCA: 202] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
![]()
In this work, carbon nanofibers were
used as doping material to
develop a highly conductive chitosan-based composite. Scaffolds based
on chitosan only and chitosan/carbon composites were prepared by precipitation.
Carbon nanofibers were homogeneously dispersed throughout the chitosan
matrix, and the composite scaffold was highly porous with fully interconnected
pores. Chitosan/carbon scaffolds had an elastic modulus of 28.1 ±
3.3 KPa, similar to that measured for rat myocardium, and excellent
electrical properties, with a conductivity of 0.25 ± 0.09 S/m.
The scaffolds were seeded with neonatal rat heart cells and cultured
for up to 14 days, without electrical stimulation. After 14 days of
culture, the scaffold pores throughout the construct volume were filled
with cells. The metabolic activity of cells in chitosan/carbon constructs
was significantly higher as compared to cells in chitosan scaffolds.
The incorporation of carbon nanofibers also led to increased expression
of cardiac-specific genes involved in muscle contraction and electrical
coupling. This study demonstrates that the incorporation of carbon
nanofibers into porous chitosan scaffolds improved the properties
of cardiac tissue constructs, presumably through enhanced transmission
of electrical signals between the cells.
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Affiliation(s)
- Ana M Martins
- Department of Biomedical Engineering, Columbia University , New York, New York 10032, United States
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27
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Kumar VA, Martinez AW, Caves JM, Naik N, Haller CA, Chaikof EL. Microablation of collagen-based substrates for soft tissue engineering. Biomed Mater 2014; 9:011002. [PMID: 24457193 DOI: 10.1088/1748-6041/9/1/011002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Noting the abundance and importance of collagen as a biomaterial, we have developed a facile method for the production of a dense fibrillar extracellular matrix mimicking collagen-elastin hybrids with tunable mechanical properties. Through the use of excimer-laser technology, we have optimized conditions for the ablation of collagen lamellae without denaturation of protein, maintenance of fibrillar ultrastructure and preservation of native D-periodicity. Strengths of collagen-elastin hybrids ranged from 0.6 to 13 MPa, elongation at break from 9 to 70% and stiffness from 2.9 to 94 MPa, allowing for the design of a wide variety of tissue specific scaffolds. Further, large (centimeter scale) lamellae can be fabricated and embedded with recombinant elastin to generate collagen-elastin hybrids. Exposed collagen in hybrids act as cell adhesive sites for rat mesenchymal stem cells that conform to ablate waveforms. The ability to modulate these features allows for the generation of a class of biopolymers that can architecturally and physiologically replicate native tissue.
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Affiliation(s)
- Vivek A Kumar
- Department of Surgery, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA. Wyss Institute of Biologically Inspired Engineering of Harvard University, Boston, MA 02215, USA. Department of Biomedical Engineering, Georgia Institute of Technology/Emory University, Atlanta, GA 30332, USA
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28
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Kilic C, Girotti A, Rodriguez-Cabello JC, Hasirci V. A collagen-based corneal stroma substitute with micro-designed architecture. Biomater Sci 2014; 2:318-29. [DOI: 10.1039/c3bm60194c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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29
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Wang ZY, Lim J, Ho YS, Zhang QY, Chong MSK, Tang M, Hong MH, Chan JKY, Teoh SH, Thian ES. Biomimetic three-dimensional anisotropic geometries by uniaxial stretching of poly(ε-caprolactone) films: degradation and mesenchymal stem cell responses. J Biomed Mater Res A 2013; 102:2197-207. [PMID: 23907895 DOI: 10.1002/jbm.a.34899] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 07/18/2013] [Accepted: 07/24/2013] [Indexed: 02/04/2023]
Abstract
Geometric cues have been used for a variety of cell regulation and tissue regenerative applications. While the function of geometric cues is being recognized, their stability and degradation behaviors are not well known. Here, we studied the influence of degradation on uniaxial-stretch-induced poly(ε-caprolactone) (UX-PCL) ridge/groove arrays and further cellular responses. Results from accelerated hydrolysis in vitro showed that UX-PCL ridge/groove arrays followed a surface-controlled erosion, with an overall geometry remained even at ∼45% film weight loss. Compared to unstretched PCL flat surfaces and/or ridge/groove arrays, UX-PCL ridge/groove arrays achieved an enhanced morphological stability against degradation. Over the degradation period, UX-PCL ridge/groove arrays exhibited an "S-shape" behavior of film weight loss, and retained more stable surface hydrophilicity and higher film mechanical properties than those of unstretched PCL surfaces. Human mesenchymal stem cells (MSCs) aligned better toward UX-PCL ridge/groove arrays when the geometries were remained intact, and became sensitive with gradually declined nucleus alignment and elongation to the geometric degradation of ridges. We speculate that uniaxial stretching confers UX-PCL ridge/groove arrays with enhanced stability against degradation in erosive environment. This study provides insights of how degradation influences geometric cues and further cell responses, and has implications for the design of biomaterials with stability-enhanced geometric cues for long-term tissue regeneration.
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Affiliation(s)
- Zu-Yong Wang
- Department of Mechanical Engineering, National University of Singapore, Singapore
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30
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Particle-collision and porogen-leaching technique to fabricate polymeric porous scaffolds with microscale roughness of interior surfaces. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1264-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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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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Heister E, Brunner EW, Dieckmann GR, Jurewicz I, Dalton AB. Are carbon nanotubes a natural solution? Applications in biology and medicine. ACS APPLIED MATERIALS & INTERFACES 2013; 5:1870-1891. [PMID: 23427832 DOI: 10.1021/am302902d] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Carbon nanotubes and materials based on carbon nanotubes have many perceived applications in the field of biomedicine. Several highly promising examples have been highlighted in the literature, ranging from their use as growth substrates or tissue scaffolds to acting as intracellular transporters for various therapeutic and diagnostic agents. In addition, carbon nanotubes have a strong optical absorption in the near-infrared region (in which tissue is transparent), which enables their use for biological imaging applications and photothermal ablation of tumors. Although these advances are potentially game-changing, excitement must be tempered somewhat as several bottlenecks exist. Carbon nanotube-based technologies ultimately have to compete with and out-perform existing technologies in terms of performance and price. Moreover, issues have been highlighted relating to toxicity, which presents an obstacle for the transition from preclinical to clinical use. Although many studies have suggested that well-functionalized carbon nanotubes appear to be safe to the treated animals, mainly rodents, long-term toxicity issues remains to be elucidated. In this report, we systematically highlight some of the most promising biomedical application areas of carbon nanotubes and review the interaction of carbon nanotubes with cultured cells and living organisms with a particular focus on in vivo biodistribution and potential adverse health effects. To conclude, future challenges and prospects of carbon nanotubes for biomedical applications will be addressed.
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Affiliation(s)
- Elena Heister
- Faculty of Engineering and Physical Sciences, University of Surrey, Guildford GU2 7XH, United Kingdom
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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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34
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Blood Vessel Tissue Engineering. Biomater Sci 2013. [DOI: 10.1016/b978-0-08-087780-8.00115-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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35
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Lomba M, Oriol L, Sánchez C, Grazú V, Gutiérrez BS, Serrano JL, De la Fuente JM. Photocrosslinking, micropatterning and cell adhesion studies of sodium hyaluronate with a trisdiazonium salt. Carbohydr Polym 2012; 90:419-30. [DOI: 10.1016/j.carbpol.2012.05.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 05/07/2012] [Accepted: 05/19/2012] [Indexed: 11/28/2022]
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Hasirci V, Pepe-Mooney BJ. Understanding the cell behavior on nano-/micro-patterned surfaces. Nanomedicine (Lond) 2012; 7:1375-89. [DOI: 10.2217/nnm.12.7] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Aim: This article reports on studies conducted in the same laboratory on interactions between patterned substrates with different pattern dimensions and chemistries, and various types of cells. Materials & methods: In order to compare the influence of various parameters, bone marrow stromal cells, retinal pigment epithelial cells, human corneal stromal cells (keratocytes), Saos-2 (human osteosarcoma cells), human microvascular endothelial cells and vascular smooth muscle cells were tested on surfaces with different physical patterns and chemical properties. Results: It was observed that cell type and surface topography are more influential than surface chemistry in determining the alignment tendency of a cell on a substrate surface. Low walls (several microns high) could not confine cells into the microgrooves of the films but alignment was still possible if the cells had a natural alignment property. Conclusion: This information is very useful in designing tissue engineering scaffolds and in the long-term success of implants. Original submitted 30 November 2010; Revised submitted 4 January 2012; Published online 20 July 2012
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Affiliation(s)
- Vasif Hasirci
- Middle East Technical University, Biotechnology Research Unit, Ankara 06531, Turkey
| | - Brian J Pepe-Mooney
- Middle East Technical University, Biotechnology Research Unit, Ankara 06531, Turkey
- Department of Biology, Haverford College, 370 Lancaster Avenue, Haverford, PA 19041, USA
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Gronau G, Krishnaji ST, Kinahan ME, Giesa T, Wong JY, Kaplan DL, Buehler MJ. A review of combined experimental and computational procedures for assessing biopolymer structure-process-property relationships. Biomaterials 2012; 33:8240-55. [PMID: 22938765 DOI: 10.1016/j.biomaterials.2012.06.054] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 06/22/2012] [Indexed: 02/08/2023]
Abstract
Tailored biomaterials with tunable functional properties are desirable for many applications ranging from drug delivery to regenerative medicine. To improve the predictability of biopolymer materials functionality, multiple design parameters need to be considered, along with appropriate models. In this article we review the state of the art of synthesis and processing related to the design of biopolymers, with an emphasis on the integration of bottom-up computational modeling in the design process. We consider three prominent examples of well-studied biopolymer materials - elastin, silk, and collagen - and assess their hierarchical structure, intriguing functional properties and categorize existing approaches to study these materials. We find that an integrated design approach in which both experiments and computational modeling are used has rarely been applied for these materials due to difficulties in relating insights gained on different length- and time-scales. In this context, multiscale engineering offers a powerful means to accelerate the biomaterials design process for the development of tailored materials that suit the needs posed by the various applications. The combined use of experimental and computational tools has a very broad applicability not only in the field of biopolymers, but can be exploited to tailor the properties of other polymers and composite materials in general.
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Affiliation(s)
- Greta Gronau
- Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Mass. Ave., Cambridge, MA 02139, USA
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Isenberg BC, Backman DE, Kinahan ME, Jesudason R, Suki B, Stone PJ, Davis EC, Wong JY. Micropatterned cell sheets with defined cell and extracellular matrix orientation exhibit anisotropic mechanical properties. J Biomech 2011; 45:756-61. [PMID: 22177672 DOI: 10.1016/j.jbiomech.2011.11.015] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2011] [Indexed: 12/19/2022]
Abstract
For an arterial replacement graft to be effective, it must possess the appropriate strength in order to withstand long-term hemodynamic stress without failure, yet be compliant enough that the mismatch between the stiffness of the graft and the native vessel wall is minimized. The native vessel wall is a structurally complex tissue characterized by circumferentially oriented collagen fibers/cells and lamellar elastin. Besides the biochemical composition, the functional properties of the wall, including stiffness, depend critically on the structural organization. Therefore, it will be crucial to develop methods of producing tissues with defined structures in order to more closely mimic the properties of a native vessel. To this end, we sought to generate cell sheets that have specific ECM/cell organization using micropatterned polydimethylsiloxane (PDMS) substrates to guide cell organization and tissue growth. The patterns consisted of large arrays of alternating grooves and ridges. Adult bovine aortic smooth muscle cells cultured on these substrates in the presence of ascorbic acid produced ECM-rich sheets several cell layers thick in which both the cells and ECM exhibited strong alignment in the direction of the micropattern. Moreover, mechanical testing revealed that the sheets exhibited mechanical anisotropy similar to that of native vessels with both the stiffness and strength being significantly larger in the direction of alignment, demonstrating that the microscale control of ECM organization results in functional changes in macroscale material behavior.
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Affiliation(s)
- Brett C Isenberg
- Department of Biomedical Engineering, Boston University, College of Engineering, Boston, Massachusetts 02215, USA
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39
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Vascular Wall Engineering Via Femtosecond Laser Ablation: Scaffolds with Self-Containing Smooth Muscle Cell Populations. Ann Biomed Eng 2011; 39:3031-41. [DOI: 10.1007/s10439-011-0417-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2011] [Accepted: 09/20/2011] [Indexed: 11/26/2022]
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40
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The influence of elastin-like recombinant polymer on the self-renewing potential of a 3D tissue equivalent derived from human lamina propria fibroblasts and oral epithelial cells. Biomaterials 2011; 32:5756-64. [DOI: 10.1016/j.biomaterials.2011.04.054] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2011] [Accepted: 04/20/2011] [Indexed: 01/06/2023]
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41
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Lomba M, Oriol L, Alcalá R, Sánchez C, Moros M, Grazú V, Serrano JL, De la Fuente JM. In situ photopolymerization of biomaterials by thiol-yne click chemistry. Macromol Biosci 2011; 11:1505-14. [PMID: 21793215 DOI: 10.1002/mabi.201100123] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2011] [Revised: 05/31/2011] [Indexed: 11/06/2022]
Abstract
The thiol-yne click chemistry reaction has been used for the in situ photocrosslinking of an aliphatic hyperbranched polyester. The biocompatibility of the resulting networks has been studied and marked cytotoxicity was not found for HeLa (human cervical carcinoma) tumoral cells and COS7 fibroblasts. The photoinduced thiol-yne process allows the generation of patterned structures with different geometries in films by DLW and these materials can be used as substrates for cell adhesion. The influence of the substrate geometry on cell adhesion has been studied by culturing cells onto these substrates and a preference for the photopatterned polymeric material can be seen in some of the structures by contrast phase microscopy. Actin and vinculin fluorescent staining revealed different adhesion behavior for HeLa cells and COS7 fibroblasts and this could be assigned to the different motility of cells. The thiol-yne photoreaction has proven to be an attractive approach for the preparation of micropatterned biomaterials.
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Affiliation(s)
- Miguel Lomba
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza, Departamento de Química Orgánica, Zaragoza, Spain
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42
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Tissue Engineering of Blood Vessels: Functional Requirements, Progress, and Future Challenges. Cardiovasc Eng Technol 2011. [PMID: 23181145 DOI: 10.1007/s13239-011-0049-3] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Vascular disease results in the decreased utility and decreased availability of autologus vascular tissue for small diameter (< 6 mm) vessel replacements. While synthetic polymer alternatives to date have failed to meet the performance of autogenous conduits, tissue-engineered replacement vessels represent an ideal solution to this clinical problem. Ongoing progress requires combined approaches from biomaterials science, cell biology, and translational medicine to develop feasible solutions with the requisite mechanical support, a non-fouling surface for blood flow, and tissue regeneration. Over the past two decades interest in blood vessel tissue engineering has soared on a global scale, resulting in the first clinical implants of multiple technologies, steady progress with several other systems, and critical lessons-learned. This review will highlight the current inadequacies of autologus and synthetic grafts, the engineering requirements for implantation of tissue-engineered grafts, and the current status of tissue-engineered blood vessel research.
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Zorlutuna P, Vadgama P, Hasirci V. Both sides nanopatterned tubular collagen scaffolds as tissue-engineered vascular grafts. J Tissue Eng Regen Med 2011; 4:628-37. [PMID: 20603868 DOI: 10.1002/term.278] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Two major requirements for a tissue-engineered vessel are the establishment of a continuous endothelium and adequate mechanical properties. In this study, a novel tubular collagen scaffold possessing nanopatterns in the form of channels (with a 650 nm periodicity) on both sides was designed and examined after seeding and co-culturing with vascular cells. Initially, the exterior of the tube was seeded with human vascular smooth muscle cells (VSMCs), cultured for 14 days, and then human internal thoracic artery endothelial cells (HITAECs) were seeded on the inside of the tube and cultured for a further week. Microscopy revealed that nano-scale patterns could be reproduced on collagen with high fidelity and preserved during incubation in vitro. The VSMCs were circumferentially orientated with the help of these nanopatterns and formed multilayers on the exterior, while HITAECs formed a continuous layer on the interior, as is the case in natural vessels. Both cell types were observed to proliferate and retain their phenotypes in the co-culture.
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Affiliation(s)
- P Zorlutuna
- METU, BIOMAT, Department of Biotechnology, Biotechnology Research Unit, Ankara, Turkey.
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44
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Kinikoglu B, Rodríguez-Cabello JC, Damour O, Hasirci V. A smart bilayer scaffold of elastin-like recombinamer and collagen for soft tissue engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2011; 22:1541-1554. [PMID: 21505829 DOI: 10.1007/s10856-011-4315-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Accepted: 04/04/2011] [Indexed: 05/30/2023]
Abstract
Elastin-like recombinamers (ELRs) are smart, protein-based polymers designed with desired peptide sequences using recombinant DNA technology. The aim of the present study was to produce improved tissue engineering scaffolds from collagen and an elastin-like protein tailored to contain the cell adhesion peptide RGD, and to investigate the structural and mechanical capacities of the resulting scaffolds (foams, fibers and foam-fiber bilayer scaffolds). The results of the scanning electron microscopy, mercury porosimetry and mechanical testing indicated that incorporation of ELR into the scaffolds improved the uniformity and continuity of the pore network, decreased the pore size (from 200 to 20 μm) and the fiber diameter (from 1.179 μm to 306 nm), broadened the pore size distribution (from 70-200 to 4-200 μm) and increased their flexibility (from 0.007 to 0.011 kPa⁻¹). Culture of human fibroblasts and epithelial cells in ELR-collagen scaffolds showed the positive contribution of ELR on proliferation of both types of cells.
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Affiliation(s)
- Beste Kinikoglu
- Banque de Tissus et Cellules, Hospices Civils de Lyon, 69437 Lyon, France
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45
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Kim G, Ahn S, Kim Y, Cho Y, Chun W. Coaxial structured collagen–alginate scaffolds: fabrication, physical properties, and biomedical application for skin tissue regeneration. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03452e] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Walz MM, Vollnhals F, Schirmer M, Steinrück HP, Marbach H. Generation of clean iron nanocrystals on an ultra-thin SiOx film on Si(001). Phys Chem Chem Phys 2011; 13:17333-8. [DOI: 10.1039/c1cp20865a] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Lanasa SM, Hoffecker IT, Bryant SJ. Presence of pores and hydrogel composition influence tensile properties of scaffolds fabricated from well-defined sphere templates. J Biomed Mater Res B Appl Biomater 2010; 96:294-302. [PMID: 21210509 DOI: 10.1002/jbm.b.31765] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 06/30/2010] [Accepted: 07/07/2010] [Indexed: 01/16/2023]
Abstract
Sphere templating is an attractive method to produce porous polymeric scaffolds with well-defined and uniform pore structures for applications in tissue engineering. While high porosity is desired to facilitate cell seeding and enhance nutrient transport, the incorporation of pores will impact gross mechanical properties of tissue scaffolds and will likely be dependent on pore size. The goals of this study were to evaluate the effect of pores, pore diameter, and polymer composition on gross mechanical properties of hydrogels prepared from crosslinked poly(ethylene glycol) (PEG) and poly(2-hydroxyethyl methacrylate) (pHEMA). Sphere templates were fabricated from uncrosslinked poly(methyl methacrylate) spheres sieved between 53-63 and 150-180 μm. Incorporating pores into hydrogels significantly decreased the quasi-static modulus and ultimate tensile stress, but increased the ultimate tensile strain. For pHEMA, decreases in gel crosslinking density and increases in pore diameters followed similar trends. Interestingly, the mechanical properties of porous PEG hydrogels were less sensitive to changes in pore diameter for a given polymer composition. Additionally, pore diameter was shown to affect skeletal myoblast adhesion whereby many cells cultured in porous hydrogels with smaller pores were seen spanning across multiple pores, but lined the inside of larger pores. In summary, incorporation of pores and changes in pore diameter significantly affect the gross mechanical properties, but in a manner that is dependent on gel chemistry, structure, and composition. Together, these findings will help to design better hydrogel scaffolds for applications where gross mechanical properties and porosity are critical.
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Affiliation(s)
- Stephanie M Lanasa
- Department of Chemical and Biological Engineering, The University of Colorado at Boulder, Boulder, Colorado 80309, USA
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48
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Yilgor P, Sousa RA, Reis RL, Hasirci N, Hasirci V. Effect of scaffold architecture and BMP-2/BMP-7 delivery on in vitro bone regeneration. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:2999-3008. [PMID: 20740306 DOI: 10.1007/s10856-010-4150-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2010] [Accepted: 08/07/2010] [Indexed: 05/29/2023]
Abstract
The aim of this study was to develop 3-D tissue engineered constructs that mimic the in vivo conditions through a self-contained growth factor delivery system. A set of nanoparticles providing the release of BMP-2 initially followed by the release of BMP-7 were incorporated in poly(ε-caprolactone) scaffolds with different 3-D architectures produced by 3-D plotting and wet spinning. The release patterns were: each growth factor alone, simultaneous, and sequential. The orientation of the fibers did not have a significant effect on the kinetics of release of the model protein BSA; but affected proliferation of bone marrow mesenchymal stem cells. Cell proliferation on random scaffolds was significantly higher compared to the oriented ones. Delivery of BMP-2 alone suppressed MSC proliferation and increased the ALP activity to a higher level than that with BMP-7 delivery. Proliferation rate was suppressed the most by the sequential delivery of the two growth factors from the random scaffold on which the ALP activity was the highest. Results indicated the distinct effect of scaffold architecture and the mode of growth factor delivery on the proliferation and osteogenic differentiation of MSCs, enabling us to design multifunctional scaffolds capable of controlling bone healing.
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Affiliation(s)
- Pinar Yilgor
- METU, BIOMAT, Department of Biotechnology, Biotechnology Research Unit, 06531 Ankara, Turkey
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49
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You Q, Wang F, Duan L, Du X, Xiao M, Shen Z. Construction of Small-Caliber, Polydiaxanone Cyclohexanone Vascular Stents. Cell Biochem Biophys 2010; 57:35-43. [DOI: 10.1007/s12013-010-9081-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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50
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Chung K, DeQUACH JA, Christman KL. NANOPATTERNED INTERFACES FOR CONTROLLING CELL BEHAVIOR. NANO LIFE 2010; 1:63-77. [PMID: 25383101 PMCID: PMC4221096 DOI: 10.1142/s1793984410000055] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Many studies have demonstrated that microscale changes to surface chemistry and topography affect cell adhesion, proliferation, differentiation, and gene expression. More recently, studies have begun to examine cell behavior interactions with structures on the nanoscale since in vivo, cells recognize and adhere to cell adhesion receptors that are spatially organized on this scale. These studies have been enabled through various fabrication methods, many of which were initially developed for the semiconductor industry. This review explores cell responses to a variety of controlled topographical and biochemical cues using an assortment of nanoscale fabrication methods in order to elucidate which pattern dimensions are beneficial for controlling cell adhesion and differentiation.
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Affiliation(s)
- Kevin Chung
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0412, USA
| | - Jessica A DeQUACH
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0412, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, 9500 Gilman Drive La Jolla, CA 92093-0412, USA
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