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Liu H, Hu Y, Wu X, Hu R, Liu Y. Optimization of Surface-Engineered Micropatterns on Bacterial Cellulose for Guided Scar-Free Skin Wound Healing. Biomolecules 2023; 13:biom13050793. [PMID: 37238663 DOI: 10.3390/biom13050793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 05/28/2023] Open
Abstract
Bacterial cellulose (BC) has been widely used in tissue engineering due to its unique spatial structure and suitable biological properties. In this study, a small biologically active Arginine-Glycine-Aspartic acid-Serine (RGDS) tetrapeptide was incorporated on the porous BC surface followed by a low-energy CO2 laser etching operation. As a result, different micropatterns were established on the BC surface with RGDS only anchored on the raised platform surface of the micropatterned BC (MPBC). Material characterization showed that all micropatterned structures exhibited platforms with a width of ~150 μm and grooves with a width of ~100 μm and a depth of ~300 μm, which displayed distinct hydrophilic and hydrophobic properties. The resulting RGDS-MPBC could hold the material integrity, as well as the microstructure morphology under a humid environment. In-vitro and in-vivo assays on cell migration, collagen deposition, and histological analysis revealed that micropatterns led to significant impacts on wound healing progress compared to the BC without surface-engineered micropatterns. Specifically, the basket-woven micropattern etched on the BC surface exhibited the optimal wound healing outcome with the presence of fewer macrophages and the least scar formation. This study further addresses the potential of adopting surface micropatterning strategies to promote skin wounds towards scar-free outcomes.
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Affiliation(s)
- Haiyan Liu
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, China
| | - Yang Hu
- Center for Human Tissue and Organs Degeneration and Shenzhen Key Laboratory of Marine Biomedical Materials, Institute of Biomedicine and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Xiuping Wu
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, China
| | - Rong Hu
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, China
| | - Yingyu Liu
- Shanxi Province Key Laboratory of Oral Diseases Prevention and New Materials, Shanxi Medical University School and Hospital of Stomatology, Taiyuan 030001, China
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2
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Hariharan P, Sundarrajan S, Arthanareeswaran G, Seshan S, Das DB, Ismail AF. Advancements in modification of membrane materials over membrane separation for biomedical applications-Review. ENVIRONMENTAL RESEARCH 2022; 204:112045. [PMID: 34536369 DOI: 10.1016/j.envres.2021.112045] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
A comprehensive overview of various modifications carried out on polymeric membranes for biomedical applications has been presented in this review paper. In particular, different methods of carrying out these modifications have been discussed. The uniqueness of the review lies in the sense that it discusses the surface modification techniques traversing the timeline from traditionally well-established technologies to emerging new techniques, thus giving an intuitive understanding of the evolution of surface modification techniques over time. A critical comparison of the advantages and pitfalls of commonly used traditional and emerging surface modification techniques have been discussed. The paper also highlights the tuning of specific properties of polymeric membranes that are critical for their increased applications in the biomedical industry specifically in drug delivery, along with current challenges faced and where the future potential of research in the field of surface modification of membranes.
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Affiliation(s)
- Pooja Hariharan
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India
| | - Sujithra Sundarrajan
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India
| | - G Arthanareeswaran
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India.
| | - Sunanda Seshan
- Membrane Research Laboratory, Department of Chemical Engineering, National Institute of Technology, Tiruchirappalli, 620015, India
| | - Diganta B Das
- Department of Chemical Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | - A F Ismail
- Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, Johor, Malaysia
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3
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O’Connor C, Brady E, Zheng Y, Moore E, Stevens KR. Engineering the multiscale complexity of vascular networks. NATURE REVIEWS. MATERIALS 2022; 7:702-716. [PMID: 35669037 PMCID: PMC9154041 DOI: 10.1038/s41578-022-00447-8] [Citation(s) in RCA: 60] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/22/2022] [Indexed: 05/14/2023]
Abstract
The survival of vertebrate organisms depends on highly regulated delivery of oxygen and nutrients through vascular networks that pervade nearly all tissues in the body. Dysregulation of these vascular networks is implicated in many common human diseases such as hypertension, coronary artery disease, diabetes and cancer. Therefore, engineers have sought to create vascular networks within engineered tissues for applications such as regenerative therapies, human disease modelling and pharmacological testing. Yet engineering vascular networks has historically remained difficult, owing to both incomplete understanding of vascular structure and technical limitations for vascular fabrication. This Review highlights the materials advances that have enabled transformative progress in vascular engineering by ushering in new tools for both visualizing and building vasculature. New methods such as bioprinting, organoids and microfluidic systems are discussed, which have enabled the fabrication of 3D vascular topologies at a cellular scale with lumen perfusion. These approaches to vascular engineering are categorized into technology-driven and nature-driven approaches. Finally, the remaining knowledge gaps, emerging frontiers and opportunities for this field are highlighted, including the steps required to replicate the multiscale complexity of vascular networks found in nature.
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Affiliation(s)
- Colleen O’Connor
- Department of Bioengineering, University of Washington, Seattle, WA USA
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA USA
| | - Eileen Brady
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA USA
- Department of Molecular and Cellular Biology, University of Washington, Seattle, WA USA
| | - Ying Zheng
- Department of Bioengineering, University of Washington, Seattle, WA USA
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA USA
- Center for Cardiovascular Biology, University of Washington, Seattle, WA USA
| | - Erika Moore
- Department of Materials Science and Engineering, University of Florida, Gainesville, FL USA
| | - Kelly R. Stevens
- Department of Bioengineering, University of Washington, Seattle, WA USA
- Institute for Stem Cell and Regenerative Medicine, Seattle, WA USA
- Center for Cardiovascular Biology, University of Washington, Seattle, WA USA
- Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA USA
- Brotman Baty Institute, Seattle, WA USA
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4
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Kawabata K, Totani M, Kawaguchi D, Matsuno H, Tanaka K. Two-Dimensional Cellular Patterning on a Polymer Film Based on Interfacial Stiffness. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14911-14919. [PMID: 34902971 DOI: 10.1021/acs.langmuir.1c02776] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The mechanical properties in the outermost region of a polymer film strongly affect various material functions. We here propose a novel and promising strategy for the two-dimensional regulation of the mechanical properties of a polymer film at the water interface based on an inkjet drawing of silica nanoparticles (SNPs) underneath it. A film of poly(2-hydroxyethyl methacrylate) (PHEMA), which exhibits excellent bioinertness properties at the water interface, was well fabricated on a substrate with a pattern of SNPs. X-ray photoelectron spectroscopy and atomic force microscopy confirmed that the surface of the PHEMA film was flat and chemically homogeneous. However, the film surface was in-plane heterogeneous in stiffness due to the presence of the underlying SNP lines. It was also noted that NIH/3T3 fibroblast cells selectively adhered and formed aggregates on the areas under which an SNP line was drawn.
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Affiliation(s)
- Kento Kawabata
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - Masayasu Totani
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
| | - Daisuke Kawaguchi
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
- Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan
| | - Hisao Matsuno
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
- Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan
| | - Keiji Tanaka
- Department of Applied Chemistry, Kyushu University, Fukuoka 819-0395, Japan
- Centre for Polymer Interface and Molecular Adhesion Science, Kyushu University, Fukuoka 819-0395, Japan
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Ebhodaghe SO. Natural Polymeric Scaffolds for Tissue Engineering Applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2021; 32:2144-2194. [PMID: 34328068 DOI: 10.1080/09205063.2021.1958185] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Natural polymeric scaffolds can be used for tissue engineering applications such as cell delivery and cell-free supporting of native tissues. This is because of their desirable properties such as; high biocompatibility, tunable mechanical strength and conductivity, large surface area, porous- and extracellular matrix (ECM)-mimicked structures. Specifically, their less toxicity and biocompatibility makes them suitable for several tissue engineering applications. For these reasons, several biopolymeric scaffolds are currently being explored for numerous tissue engineering applications. To date, research on the nature, chemistry, and properties of nanocomposite biopolymers are been reported, while the need for a comprehensive research note on more tissue engineering application of these biopolymers remains. As a result, this present study comprehensively reviews the development of common natural biopolymers as scaffolds for tissue engineering applications such as cartilage tissue engineering, cornea repairs, osteochondral defect repairs, and nerve regeneration. More so, the implications of research findings for further studies are presented, while the impact of research advances on future research and other specific recommendations are added as well.
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Kim JA, Hong S, Rhee WJ. Microfluidic three-dimensional cell culture of stem cells for high-throughput analysis. World J Stem Cells 2019; 11:803-816. [PMID: 31693013 PMCID: PMC6828593 DOI: 10.4252/wjsc.v11.i10.803] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/02/2019] [Accepted: 07/29/2019] [Indexed: 02/06/2023] Open
Abstract
Although the recent advances in stem cell engineering have gained a great deal of attention due to their high potential in clinical research, the applicability of stem cells for preclinical screening in the drug discovery process is still challenging due to difficulties in controlling the stem cell microenvironment and the limited availability of high-throughput systems. Recently, researchers have been actively developing and evaluating three-dimensional (3D) cell culture-based platforms using microfluidic technologies, such as organ-on-a-chip and organoid-on-a-chip platforms, and they have achieved promising breakthroughs in stem cell engineering. In this review, we start with a comprehensive discussion on the importance of microfluidic 3D cell culture techniques in stem cell research and their technical strategies in the field of drug discovery. In a subsequent section, we discuss microfluidic 3D cell culture techniques for high-throughput analysis for use in stem cell research. In addition, some potential and practical applications of organ-on-a-chip or organoid-on-a-chip platforms using stem cells as drug screening and disease models are highlighted.
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Affiliation(s)
- Jeong Ah Kim
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, South Korea
- Department of Bio-Analytical Science, University of Science and Technology, Daejeon 34113, South Korea
| | - Soohyun Hong
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, South Korea
- Program in Biomicro System Technology, Korea University, Seoul 02841, South Korea
| | - Won Jong Rhee
- Division of Bioengineering, Incheon National University, Incheon 22012, South Korea
- Department of Bioengineering and Nano-Bioengineering, Incheon National University, Incheon 22012, South Korea
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7
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Ge Z, Yu H, Yang W, Yang J, Liu B, Wang X, Liu Z, Liu L. Development of Multi-Dimensional Cell Co-Culture via a Novel Microfluidic Chip Fabricated by DMD-Based Optical Projection Lithography. IEEE Trans Nanobioscience 2019; 18:679-686. [PMID: 31514145 DOI: 10.1109/tnb.2019.2940258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Establishing a physiological microenvironment in vitro that is suitable for cell and tissue growth is essential for medical research. Microfluidic chips are widely used in the construction of a microenvironment and the analysis of cell behavior in vitro; however, the design and manufacture of microfluidic chips for the long-term culture of a tumor model tends to be highly complex and time-consuming. In this paper, we propose a method for the rapid fabrication of a microfluidic chip for multi-dimensional cell co-culture. A major advantage of this method is that the microfluidic chip can be divided into several sections by micro-pillar arrays to form different functional regions to grow two- and three-dimensional cell culture on the same matrix. At the micro-scale, the surface tension between the gelatin methacryloyl-encapsulated cells and micro-pillars prevents the leakage of the hydrogel, and the hydrogel provides a three-dimensional microenvironment for cell growth. Our results of long-term cell culture and preclinical drug screening showed that cells cultured in a two-dimensional monolayer differ from three-dimensional cultured cells in terms of morphology, area, survival rate, proliferation, and drug resistance. This method shows potential for use in the study of cell behavior, drug screening, and tissue engineering.
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Liu T, Wang Y, Zhong W, Li B, Mequanint K, Luo G, Xing M. Biomedical Applications of Layer-by-Layer Self-Assembly for Cell Encapsulation: Current Status and Future Perspectives. Adv Healthc Mater 2019; 8:e1800939. [PMID: 30511822 DOI: 10.1002/adhm.201800939] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/10/2018] [Indexed: 12/23/2022]
Abstract
Encapsulating living cells within multilayer functional shells is a crucial extension of cellular functions and a further development of cell surface engineering. In the last decade, cell encapsulation has been widely utilized in many cutting-edge biomedical fields. Compared with other techniques for cell encapsulation, layer-by-layer (LbL) self-assembly technology, due to the versatility and tunability to fabricate diverse multilayer shells with controllable compositions and structures, is considered as a promising approach for cell encapsulation. This review summarizes the state-of-the-art and potential future biomedical applications of LbL cell encapsulation. First of all, a brief introduction to the LbL self-assembly technique, including assembly mechanisms and technologies, is made. Next, different cell encapsulation strategies by LbL self-assembly techniques are explained. Then, the biomedical applications of LbL cell encapsulation in cell-based biosensors, cell transplantation, cell/molecule delivery, and tissue engineering, are highlighted. Finally, discussions on the current limitations and future perspectives of LbL cell encapsulation are also provided.
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Affiliation(s)
- Tengfei Liu
- Institute of Burn Research; State Key Laboratory of Trauma; Burn and Combined Injury; Southwest Hospital; Third Military Medical University (Army Medical University); Gaotanyan Street Chongqing 400038 China
| | - Ying Wang
- Institute of Burn Research; State Key Laboratory of Trauma; Burn and Combined Injury; Southwest Hospital; Third Military Medical University (Army Medical University); Gaotanyan Street Chongqing 400038 China
| | - Wen Zhong
- Department of Biosystem Engineering; Faculty of Agriculture; University of Manitoba; Winnpeg MB Canada
| | - Bingyun Li
- School of Medicine; West Virginia University; Morgantown WV 26506-9196 USA
| | - Kibret Mequanint
- Department of Chemical and Biochemical Engineering; University of Western; Ontario London N6A 5B9 Canada
| | - Gaoxing Luo
- Institute of Burn Research; State Key Laboratory of Trauma; Burn and Combined Injury; Southwest Hospital; Third Military Medical University (Army Medical University); Gaotanyan Street Chongqing 400038 China
| | - Malcolm Xing
- Institute of Burn Research; State Key Laboratory of Trauma; Burn and Combined Injury; Southwest Hospital; Third Military Medical University (Army Medical University); Gaotanyan Street Chongqing 400038 China
- Department of Mechanical Engineering; Faculty of Engineering; University of Manitoba; Winnipeg MB R3T 2N2 Canada
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9
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Zhang S, Xing M, Li B. Biomimetic Layer-by-Layer Self-Assembly of Nanofilms, Nanocoatings, and 3D Scaffolds for Tissue Engineering. Int J Mol Sci 2018; 19:E1641. [PMID: 29865178 PMCID: PMC6032323 DOI: 10.3390/ijms19061641] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 01/05/2023] Open
Abstract
Achieving surface design and control of biomaterial scaffolds with nanometer- or micrometer-scaled functional films is critical to mimic the unique features of native extracellular matrices, which has significant technological implications for tissue engineering including cell-seeded scaffolds, microbioreactors, cell assembly, tissue regeneration, etc. Compared with other techniques available for surface design, layer-by-layer (LbL) self-assembly technology has attracted extensive attention because of its integrated features of simplicity, versatility, and nanoscale control. Here we present a brief overview of current state-of-the-art research related to the LbL self-assembly technique and its assembled biomaterials as scaffolds for tissue engineering. An overview of the LbL self-assembly technique, with a focus on issues associated with distinct routes and driving forces of self-assembly, is described briefly. Then, we highlight the controllable fabrication, properties, and applications of LbL self-assembly biomaterials in the forms of multilayer nanofilms, scaffold nanocoatings, and three-dimensional scaffolds to systematically demonstrate advances in LbL self-assembly in the field of tissue engineering. LbL self-assembly not only provides advances for molecular deposition but also opens avenues for the design and development of innovative biomaterials for tissue engineering.
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Affiliation(s)
- Shichao Zhang
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV 26506, USA.
| | - Malcolm Xing
- Department of Mechanical Engineering, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.
- The Children's Hospital Research Institute of Manitoba, Winnipeg, MB R3E 3P4, Canada.
| | - Bingyun Li
- Department of Orthopaedics, School of Medicine, West Virginia University, Morgantown, WV 26506, USA.
- West Virginia University Cancer Institute, Morgantown, WV 26506, USA.
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10
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Deuerling S, Kugler S, Klotz M, Zollfrank C, Van Opdenbosch D. A Perspective on Bio-Mediated Material Structuring. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1703656. [PMID: 29178190 DOI: 10.1002/adma.201703656] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/22/2017] [Indexed: 06/07/2023]
Abstract
Bioinspiration, biomorphy, biomimicry, biomimetics, bionics, and biotemplating are terms used to describe the fabrication of materials or, more generally, systems to solve technological problems by abstracting, emulating, using, or transferring structures from biological paradigms. Herein, a brief overview of how the different terminologies are being typically applied is provided. It is proposed that there is a rich field of research that can be expanded by utilizing various novel approaches for the guidance of living organisms for "bio-mediated" material structuring purposes. As examples of contact-based or contact-free guidance, such as substrate patterning, the application of light, magnetic fields, or chemical gradients, potentially interesting methods of creating hierarchically structured monolithic engineering materials, using live patterned biomass, biofilms, or extracellular substances as scaffolds, are presented. The potential advantages of such materials are discussed, and examples of live self-patterning of materials are given.
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Affiliation(s)
- Steffi Deuerling
- Technical University of Munich Chair of Biogenic Polymers, Schulgasse 16, D-94315, Straubing, Germany
| | - Sabine Kugler
- Technical University of Munich Chair of Biogenic Polymers, Schulgasse 16, D-94315, Straubing, Germany
| | - Moritz Klotz
- Technical University of Munich Chair of Biogenic Polymers, Schulgasse 16, D-94315, Straubing, Germany
| | - Cordt Zollfrank
- Technical University of Munich Chair of Biogenic Polymers, Schulgasse 16, D-94315, Straubing, Germany
| | - Daniel Van Opdenbosch
- Technical University of Munich Chair of Biogenic Polymers, Schulgasse 16, D-94315, Straubing, Germany
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11
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Gautier SV, Shagidulin MY, Onishchenko NA, Iljinsky IM, Sevastianov VI. Influence of matrix nature on the functional efficacy of biomedical cell product for the regeneration of damaged liver (experimental model of acute liver failure). RUSSIAN JOURNAL OF TRANSPLANTOLOGY AND ARTIFICIAL ORGANS 2017. [DOI: 10.15825/1995-1191-2017-2-78-89] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Aim. A comparative analysis of the functional efficacy of biomedical cell products (BMCP) for the regeneration of damaged liver based on biopolymer scaffolded porous and hydrogel matrices was performed on the experimental model of acute liver failure. Materials and methods. Matrices allowed for clinical use were employed for BMCP in the form of a sponge made from biopolymer nanostructured composite material (BNCM) based on a highly purified bacterial copolymers of poly (β-hydroxybutyrate-co-β-oxyvalerate) and polyethylene glycol and a hydrogel matrix from biopolymer microheterogeneous collagen-containing hydrogel (BMCH). Cellular component of BMCP was represented by liver cells and multipotent mesenchymal bone marrow stem cells. The functional efficacy of BMCP for the regeneration of damaged liver was evaluated on the experimental model of acute liver failure in Wistar rats (n = 40) via biochemical, morphological, and immunohistochemical methods. Results. When BMCP was implanted to regenerate the damaged liver on the basis of the scaffolded BNCM or hydrogel BMCH matrices, the lethality in rats with acute liver failure was absent; while in control it was 66.6%. Restoration of the activity of cytolytic enzyme levels and protein-synthetic liver function began on day 9 after modeling acute liver failure, in contrast to the control group, where recovery occurred only by days 18–21. Both matrices maintained the viability and functional activity of liver cells up to 90 days with the formation of blood vessels in BMCP. The obtained data confirm that scaffolded BNCM matrix and hydrogel BMCH matrix retain for a long time (up to 90 days) the vital activity of the adherent cells in the BMCP composition, which allows using them to correct acute liver failure. At the same time, hydrogel matrix due to the presence of bioactive components contributes to the creation of the best conditions for adhesion and cell activity which accelerate the regeneration processes in the damaged liver compared to BMCP on scaffolded matrix. Conclusion. A statistically significant difference was found between the functional efficacy of the BMCP studied based on BNCM and BMCH matrices. BMCP based on hydrogel BMCH matrix was more effective for the regeneration of damaged liver.
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Affiliation(s)
- S. V. Gautier
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation; I.M. Sechenov First Moscow State Medical University of the Ministry of Healthcare of the Russian Federation
| | - M. Yu. Shagidulin
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation; I.M. Sechenov First Moscow State Medical University of the Ministry of Healthcare of the Russian Federation
| | - N. A. Onishchenko
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation
| | - I. M. Iljinsky
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation; I.M. Sechenov First Moscow State Medical University of the Ministry of Healthcare of the Russian Federation
| | - V. I. Sevastianov
- V.I. Shumakov Federal Research Center of Transplantology and Artificial Organs of the Ministry of Healthcare of the Russian Federation
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Shirani E, Razmjou A, Tavassoli H, Landarani-Isfahani A, Rezaei S, Abbasi Kajani A, Asadnia M, Hou J, Ebrahimi Warkiani M. Strategically Designing a Pumpless Microfluidic Device on an "Inert" Polypropylene Substrate with Potential Application in Biosensing and Diagnostics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:5565-5576. [PMID: 28489410 DOI: 10.1021/acs.langmuir.7b00537] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study is an attempt to make a step forward to implement the very immature concept of pumpless transportation of liquid into a real miniaturized device or lab-on-chip (LOC) on a plastic substrate. "Inert" plastic materials such as polypropylene (PP) are used in a variety of biomedical applications but their surface engineering is very challenging. Here, it was demonstrated that with a facile innovative wettability patterning route using fluorosilanized UV-independent TiO2 nanoparticle coating it is possible to create wedge-shaped open microfluidic tracks on inert solid surfaces for low-cost biomedical devices (lab-on-plastic). For the future miniaturization and integration of the tracks into a device, a variety of characterization techniques were used to not only systematically study the surface patterning chemistry and topography but also to have a clear knowledge of its biological interactions and performance. The effect of such surface architecture on the biological performance was studied in terms of static/dynamic protein (bovine serum albumin) adsorption, bacterial (Staphylococcus aureus and Staphylococcus epidermidis) adhesion, cell viability (using HeLa and MCF-7 cancer cell lines as well as noncancerous human fibroblast cells), and cell patterning (Murine embryonic fibroblasts). Strategies are discussed for incorporating such a confined track into a diagnostic device in which its sensing portion is based on protein, microorganism, or cells. Finally, for the proof-of-principle of biosensing application, the well-known high-affinity molecular couple of BSA-antiBSA as a biological model was employed.
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Affiliation(s)
- Elham Shirani
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan , Isfahan 81746-73441, Iran
| | - Amir Razmjou
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan , Isfahan 81746-73441, Iran
| | - Hossein Tavassoli
- School of Mechanical and Manufacturing Engineering, Australian Centre for NanoMedicine, University of New South Wales , Sydney, New South Wales 2052, Australia
| | | | - Saghar Rezaei
- Department of Chemistry, University of Isfahan , Isfahan 81746-73441, Iran
| | - Abolghasem Abbasi Kajani
- Department of Biotechnology, Faculty of Advanced Sciences and Technologies, University of Isfahan , Isfahan 81746-73441, Iran
| | - Mohsen Asadnia
- Department of Engineering, Macquarie University , Sydney, New South Wales 2109, Australia
| | - Jingwei Hou
- UNESCO Centre for Membrane Science and Technology, School of Chemical Science and Engineering, The University of New South Wales , Sydney, New South Wales 2052, Australia
| | - Majid Ebrahimi Warkiani
- School of Mechanical and Manufacturing Engineering, Australian Centre for NanoMedicine, University of New South Wales , Sydney, New South Wales 2052, Australia
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Bax DV, Davidenko N, Gullberg D, Hamaia SW, Farndale RW, Best SM, Cameron RE. Fundamental insight into the effect of carbodiimide crosslinking on cellular recognition of collagen-based scaffolds. Acta Biomater 2017; 49:218-234. [PMID: 27915017 DOI: 10.1016/j.actbio.2016.11.059] [Citation(s) in RCA: 101] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 10/26/2016] [Accepted: 11/28/2016] [Indexed: 01/31/2023]
Abstract
Research on the development of collagen constructs is extremely important in the field of tissue engineering. Collagen scaffolds for numerous tissue engineering applications are frequently crosslinked with 1-ethyl-3-(3-dimethylaminopropyl-carbodiimide hydrochloride (EDC) in the presence of N-hydroxy-succinimide (NHS). Despite producing scaffolds with good biocompatibility and low cellular toxicity the influence of EDC/NHS crosslinking on the cell interactive properties of collagen has been overlooked. Here we have extensively studied the interaction of model cell lines with collagen I-based materials after crosslinking with different ratios of EDC in relation to the number of carboxylic acid residues on collagen. Divalent cation-dependent cell adhesion, via integrins α1β1, α2β1, α10β1 and α11β1, were sensitive to EDC crosslinking. With increasing EDC concentration, this was replaced with cation-independent adhesion. These results were replicated using purified recombinant I domains derived from integrin α1 and α2 subunits. Integrin α2β1-mediated cell spreading, apoptosis and proliferation were all heavily influenced by EDC crosslinking of collagen. Data from this rigorous study provides an exciting new insight that EDC/NHS crosslinking is utilising the same carboxylic side chain chemistry that is vital for native-like integrin-mediated cell interactions. Due to the ubiquitous usage of EDC/NHS crosslinked collagen for biomaterials fabrication this data is essential to have a full understanding in order to ensure optimized collagen-based material performance. STATEMENT OF SIGNIFICANCE Carbodiimide stabilised collagen is employed extensively for the fabrication of biologically active materials. Despite this common usage, the effect of carbodiimide crosslinking on cell-collagen interactions is unclear. Here we have found that carbodiimide crosslinking of collagen inhibits native-like, whilst increasing non-native like, cellular interactions. We propose a mechanistic model in which carbodiimide modifies the carboxylic acid groups on collagen that are essential for cell binding. As such we feel that this research provides a crucial, long awaited, insight into the bioactivity of carbodiimide crosslinked collagen. Through the ubiquitous use of collagen as a cellular substrate we feel that this is fundamental to a wide range of research activity with high impact across a broad range of disciplines.
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Cellular Response to Surface Topography and Substrate Stiffness. STEM CELL BIOLOGY AND REGENERATIVE MEDICINE 2017. [DOI: 10.1007/978-3-319-51617-2_3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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15
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Richardson JJ, Cui J, Björnmalm M, Braunger JA, Ejima H, Caruso F. Innovation in Layer-by-Layer Assembly. Chem Rev 2016; 116:14828-14867. [PMID: 27960272 DOI: 10.1021/acs.chemrev.6b00627] [Citation(s) in RCA: 449] [Impact Index Per Article: 56.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Methods for depositing thin films are important in generating functional materials for diverse applications in a wide variety of fields. Over the last half-century, the layer-by-layer assembly of nanoscale films has received intense and growing interest. This has been fueled by innovation in the available materials and assembly technologies, as well as the film-characterization techniques. In this Review, we explore, discuss, and detail innovation in layer-by-layer assembly in terms of past and present developments, and we highlight how these might guide future advances. A particular focus is on conventional and early developments that have only recently regained interest in the layer-by-layer assembly field. We then review unconventional assemblies and approaches that have been gaining popularity, which include inorganic/organic hybrid materials, cells and tissues, and the use of stereocomplexation, patterning, and dip-pen lithography, to name a few. A relatively recent development is the use of layer-by-layer assembly materials and techniques to assemble films in a single continuous step. We name this "quasi"-layer-by-layer assembly and discuss the impacts and innovations surrounding this approach. Finally, the application of characterization methods to monitor and evaluate layer-by-layer assembly is discussed, as innovation in this area is often overlooked but is essential for development of the field. While we intend for this Review to be easily accessible and act as a guide to researchers new to layer-by-layer assembly, we also believe it will provide insight to current researchers in the field and help guide future developments and innovation.
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Affiliation(s)
- Joseph J Richardson
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia.,Manufacturing, CSIRO , Clayton, Victoria 3168, Australia
| | - Jiwei Cui
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Mattias Björnmalm
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Julia A Braunger
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
| | - Hirotaka Ejima
- Institute of Industrial Science, The University of Tokyo , Tokyo 153-8505, Japan
| | - Frank Caruso
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, and the Department of Chemical and Biomolecular Engineering, The University of Melbourne , Parkville, Victoria 3010, Australia
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16
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Groen N, Guvendiren M, Rabitz H, Welsh WJ, Kohn J, de Boer J. Stepping into the omics era: Opportunities and challenges for biomaterials science and engineering. Acta Biomater 2016; 34:133-142. [PMID: 26876875 DOI: 10.1016/j.actbio.2016.02.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 01/22/2016] [Accepted: 02/10/2016] [Indexed: 12/11/2022]
Abstract
The research paradigm in biomaterials science and engineering is evolving from using low-throughput and iterative experimental designs towards high-throughput experimental designs for materials optimization and the evaluation of materials properties. Computational science plays an important role in this transition. With the emergence of the omics approach in the biomaterials field, referred to as materiomics, high-throughput approaches hold the promise of tackling the complexity of materials and understanding correlations between material properties and their effects on complex biological systems. The intrinsic complexity of biological systems is an important factor that is often oversimplified when characterizing biological responses to materials and establishing property-activity relationships. Indeed, in vitro tests designed to predict in vivo performance of a given biomaterial are largely lacking as we are not able to capture the biological complexity of whole tissues in an in vitro model. In this opinion paper, we explain how we reached our opinion that converging genomics and materiomics into a new field would enable a significant acceleration of the development of new and improved medical devices. The use of computational modeling to correlate high-throughput gene expression profiling with high throughput combinatorial material design strategies would add power to the analysis of biological effects induced by material properties. We believe that this extra layer of complexity on top of high-throughput material experimentation is necessary to tackle the biological complexity and further advance the biomaterials field. STATEMENT OF SIGNIFICANCE In this opinion paper, we postulate that converging genomics and materiomics into a new field would enable a significant acceleration of the development of new and improved medical devices. The use of computational modeling to correlate high-throughput gene expression profiling with high throughput combinatorial material design strategies would add power to the analysis of biological effects induced by material properties. We believe that this extra layer of complexity on top of high-throughput material experimentation is necessary to tackle the biological complexity and further advance the biomaterials field.
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Affiliation(s)
- Nathalie Groen
- Department of Tissue Regeneration, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Murat Guvendiren
- New Jersey Center for Biomaterials, Rutgers University, Piscataway, NJ, USA
| | - Herschel Rabitz
- Department of Chemistry, Princeton University, Princeton, NJ, USA
| | - William J Welsh
- Department of Pharmacology, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ, USA
| | - Joachim Kohn
- New Jersey Center for Biomaterials, Rutgers University, Piscataway, NJ, USA
- Department of Chemistry and Chemical Biology, New Jersey Center for Biomaterials, Rutgers University, Piscataway, NJ, USA
| | - Jan de Boer
- Department of Tissue Regeneration, MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
- cBITE Lab, Merln Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, The Netherlands
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17
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Ye F, Jiang J, Chang H, Xie L, Deng J, Ma Z, Yuan W. Improved single-cell culture achieved using micromolding in capillaries technology coupled with poly (HEMA). BIOMICROFLUIDICS 2015; 9:044106. [PMID: 26339307 PMCID: PMC4514715 DOI: 10.1063/1.4926807] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 07/02/2015] [Indexed: 05/16/2023]
Abstract
Cell studies at the single-cell level are becoming more and more critical for understanding the complex biological processes. Here, we present an optimization study investigating the positioning of single cells using micromolding in capillaries technology coupled with the cytophobic biomaterial poly (2-hydroxyethyl methacrylate) (poly (HEMA)). As a cytophobic biomaterial, poly (HEMA) was used to inhibit cells, whereas the glass was used as the substrate to provide a cell adhesive background. The poly (HEMA) chemical barrier was obtained using micromolding in capillaries, and the microchannel networks used for capillarity were easily achieved by reversibly bonding the polydimethylsiloxane mold and the glass. Finally, discrete cell adhesion regions were presented on the glass surface. This method is facile and low cost, and the reagents are commercially available. We validated the cytophobic abilities of the poly (HEMA), optimized the channel parameters for higher quality and more stable poly (HEMA) patterns by investigating the effects of changing the aspect ratio and the width of the microchannel on the poly (HEMA) grid pattern, and improved the single-cell occupancy by optimizing the dimensions of the cell adhesion regions.
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Affiliation(s)
- Fang Ye
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Jin Jiang
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Honglong Chang
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Li Xie
- Key Laboratory of Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Jinjun Deng
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Zhibo Ma
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
| | - Weizheng Yuan
- Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and School of Mechanical Engineering, Northwestern Polytechnical University , Xi'an 710072, People's Republic of China
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18
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Rodríguez-Hernández J. Wrinkled interfaces: Taking advantage of surface instabilities to pattern polymer surfaces. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.07.008] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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19
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Optimization of flow assisted entrapment of pollen grains in a microfluidic platform for tip growth analysis. Biomed Microdevices 2014; 16:23-33. [PMID: 24013680 DOI: 10.1007/s10544-013-9802-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A biocompatible polydimethylsiloxane (PDMS) biomicrofluidic platform is designed, fabricated and tested to study protuberance growth of single plant cells in a micro-vitro environment. The design consists of an inlet to introduce the cell suspension into the chip, three outlets to conduct the medium or cells out of the chip, a main distribution chamber and eight microchannels connected to the main chamber to guide the growth of tip growing plant cells. The test cells used here were pollen grains which produce cylindrical protrusions called pollen tubes. The goal was to adjust the design of the microfluidic network with the aim to enhance the uniformly distributed positioning of pollen grains at the entrances of the microchannels and to provide identical fluid flow conditions for growing pollen tubes along each microchannel. Computational fluid analysis and experimental testing were carried out to estimate the trapping efficiencies of the different designs.
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20
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Abstract
Despite the tremendous hurdles presented by the complexity of the liver's structure and function, advances in liver physiology, stem cell biology and reprogramming, and the engineering of tissues and devices are accelerating the development of cell-based therapies for treating liver disease and liver failure. This State of the Art Review discusses both the near- and long-term prospects for such cell-based therapies and the unique challenges for clinical translation.
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Affiliation(s)
- Sangeeta N Bhatia
- Institute for Medical Engineering & Science at MIT, Department of Electrical Engineering and Computer Science, David H. Koch Institute at MIT, and the Howard Hughes Medical Institute, Cambridge, MA 02139, USA. Division of Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA.
| | - Gregory H Underhill
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Kenneth S Zaret
- Institute for Regenerative Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ira J Fox
- Department of Surgery, Children's Hospital of Pittsburgh of UPMC, University of Pittsburgh School of Medicine, and McGowan Institute for Regenerative Medicine, Pittsburgh, PA 15224, USA
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21
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McKinnon DD, Brown TE, Kyburz KA, Kiyotake E, Anseth KS. Design and characterization of a synthetically accessible, photodegradable hydrogel for user-directed formation of neural networks. Biomacromolecules 2014; 15:2808-16. [PMID: 24932668 PMCID: PMC4592536 DOI: 10.1021/bm500731b] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Hydrogels with photocleavable units incorporated into the cross-links have provided researchers with the ability to control mechanical properties temporally and study the role of matrix signaling on stem cell function and fate. With a growing interest in dynamically tunable cell culture systems, methods to synthesize photolabile hydrogels from simple precursors would facilitate broader accessibility. Here, a step-growth photodegradable poly(ethylene glycol) (PEG) hydrogel system cross-linked through a strain promoted alkyne-azide cycloaddition (SPAAC) reaction and degraded through the cleavage of a nitrobenzyl ether moiety integrated into the cross-links is developed from commercially available precursors in three straightforward synthetic steps with high yields (>95%). The network evolution and degradation properties are characterized in response to one- and two-photon irradiation. The PEG hydrogel is employed to encapsulate embryonic stem cell-derived motor neurons (ESMNs), and in situ degradation is exploited to gain three-dimensional control over the extension of motor axons using two-photon infrared light. Finally, ESMNs and their in vivo synaptic partners, myotubes, are coencapsulated, and the formation of user-directed neural networks is demonstrated.
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Affiliation(s)
- Daniel D. McKinnon
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado 80303, United States
| | - Tobin E. Brown
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado 80303, United States
| | - Kyle A. Kyburz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado 80303, United States
| | - Emi Kiyotake
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado 80303, United States
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado 80303, United States
- BioFrontiers Institute, University of Colorado, Boulder, Colorado 80303, United States
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado 80303, United States
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22
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Hamon M, Hong JW. New tools and new biology: recent miniaturized systems for molecular and cellular biology. Mol Cells 2013; 36:485-506. [PMID: 24305843 PMCID: PMC3887968 DOI: 10.1007/s10059-013-0333-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 11/14/2013] [Indexed: 01/09/2023] Open
Abstract
Recent advances in applied physics and chemistry have led to the development of novel microfluidic systems. Microfluidic systems allow minute amounts of reagents to be processed using μm-scale channels and offer several advantages over conventional analytical devices for use in biological sciences: faster, more accurate and more reproducible analytical performance, reduced cell and reagent consumption, portability, and integration of functional components in a single chip. In this review, we introduce how microfluidics has been applied to biological sciences. We first present an overview of the fabrication of microfluidic systems and describe the distinct technologies available for biological research. We then present examples of microsystems used in biological sciences, focusing on applications in molecular and cellular biology.
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Affiliation(s)
- Morgan Hamon
- Materials Research and Education Center, Department of Mechanical Engineering, Auburn University, Auburn, AL 36849,
USA
| | - Jong Wook Hong
- Materials Research and Education Center, Department of Mechanical Engineering, Auburn University, Auburn, AL 36849,
USA
- College of Pharmacy, Seoul National University, Seoul 151-741,
Korea
- Department of Bionano Engineering, Hanyang University, Ansan 426-791,
Korea
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23
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Anene-Nzelu CG, Peh KY, Fraiszudeen A, Kuan YH, Ng SH, Toh YC, Leo HL, Yu H. Scalable alignment of three-dimensional cellular constructs in a microfluidic chip. LAB ON A CHIP 2013; 13:4124-4133. [PMID: 23969512 DOI: 10.1039/c3lc50730k] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
There have been considerable efforts to engineer three-dimensional (3D) microfluidic environments to enhance cellular function over conventional two-dimensional (2D) cultures in microfluidic chips, but few involve topographical features, such as micro/nano-grooves, which are beneficial for cell types of cardiac, skeletal and neuronal lineages. Here we have developed a cost-effective and scalable method to incorporate micro-topographical cues into microfluidic chips to induce cell alignment. Using commercially available optical media as molds for replica molding, we produced large surface areas of polydimethylsiloxane (PDMS) micro-grooved substrates and plasma-bonded them to multiple microfluidic chips. Besides aligning a 2D monolayer of cells, the micro-grooved substrate can align 3D cellular constructs on chip. C2C12 mouse myoblasts were cultured three-dimensionally in a microfluidic chip with incorporated PDMS micro-grooved substrate remodeled into an aligned 3D cellular construct, where the actin cytoskeleton and nuclei were preferentially oriented along the micro-grooves. Cells within the 3D cellular constructs can align without being in direct contact with the micro-grooves due to synergism between topography and fluid shear stress. Aligned C2C12 3D cellular constructs showed enhanced differentiation into skeletal muscles as compared to randomly aligned ones. This novel method enables the routine inclusion of micro-topographical cues into 2D or 3D microfluidic cultures to generate relevant physiological models for studying tissue morphogenesis and drug screening applications.
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Affiliation(s)
- Chukwuemeka George Anene-Nzelu
- Department of Bioengineering, National University of Singapore, Block EA, #03-12, 9 Engineering Drive 1, Singapore 117576, Singapore
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24
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Drifka CR, Eliceiri KW, Weber SM, Kao WJ. A bioengineered heterotypic stroma-cancer microenvironment model to study pancreatic ductal adenocarcinoma. LAB ON A CHIP 2013; 13:3965-75. [PMID: 23959166 PMCID: PMC3834588 DOI: 10.1039/c3lc50487e] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Interactions between neoplastic epithelial cells and components of a reactive stroma in pancreatic ductal adenocarcinoma (PDAC) are of key significance behind the disease's dismal prognosis. Despite extensive published research in the importance of stroma-cancer interactions in other cancers and experimental evidence supporting the importance of the microenvironment in PDAC progression, a reproducible three-dimensional (3D) in vitro model for exploring stroma-cancer interplay and evaluating therapeutics in a physiologically relevant context has been lacking. We introduce a humanized microfluidic model of the PDAC microenvironment incorporating multicellularity, extracellular matrix (ECM) components, and a spatially defined 3D microarchitecture. Pancreatic stellate cells (PSCs) isolated from clinically-evaluated human tissue specimens were co-cultured with pancreatic ductal adenocarcinoma cells as an accessible 3D construct that maintained important tissue features and disease behavior. Multiphoton excitation (MPE) and Second Harmonic Generation (SHG) imaging techniques were utilized to image the intrinsic signal of stromal collagen in human pancreatic tissues and live cell-collagen interactions within the optically-accessible microfluidic tissue model. We further evaluated the dose-response of the model with the anticancer agent paclitaxel. This bioengineered model of the PDAC stroma-cancer microenvironment provides a complementary platform to elucidate the complex stroma-cancer interrelationship and to evaluate the efficacy of potential therapeutics in a humanized system that closely recapitulates key PDAC microenvironment characteristics.
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Affiliation(s)
- Cole R. Drifka
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
- Laboratory for Optical and Computational Instrumentation, University of Wisconsin, Madison, WI, USA
| | - Kevin W. Eliceiri
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
- Laboratory for Optical and Computational Instrumentation, University of Wisconsin, Madison, WI, USA
- Paul P. Carbone Comprehensive Cancer Center, University of Wisconsin, Madison, WI, USA
| | - Sharon M. Weber
- Paul P. Carbone Comprehensive Cancer Center, University of Wisconsin, Madison, WI, USA
- Department of Surgery, University of Wisconsin, Madison, WI, USA
| | - W. John Kao
- Department of Biomedical Engineering, University of Wisconsin, Madison, WI, USA
- Laboratory for Optical and Computational Instrumentation, University of Wisconsin, Madison, WI, USA
- Paul P. Carbone Comprehensive Cancer Center, University of Wisconsin, Madison, WI, USA
- Department of Surgery, University of Wisconsin, Madison, WI, USA
- School of Pharmacy, University of Wisconsin, Madison, WI, USA
- UW Institute for Clinical and Translational Research, University of Wisconsin, Madison, WI, USA
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Abstract
Tissue scaffolds play a vital role in tissue engineering by providing a native tissue-mimicking environment for cell proliferation and differentiation as well as tissue regeneration. Fabrication of tissue scaffolds has been drawing increasing research attention and a number of fabrication techniques have been developed. To better mimic the microenvironment of native tissues, novel techniques have emerged in recent years to encapsulate cells into the engineered scaffolds during the scaffold fabrication process. Among them, bio-Rapid-Prototyping (bioRP) techniques, by which scaffolds with encapsulated cells can be fabricated with controlled internal microstructure and external shape, shows significant promise. It is noted in the bioRP processes, cells may be continuously subjected to environmental stresses such as mechanical, electrical forces and laser exposure. If the stress is greater than a certain level, the cell membrane may be ruptured, leading to the so-called process-induced cell damage. This paper reviews various cell encapsulation techniques for tissue scaffold fabrication, with emphasis on the bioRP technologies and their technical features. To understand the process-induced cell damage in the bioRP processes, this paper also surveys the cell damage mechanisms under different stresses. The process-induced cell damage models are also examined to provide a cue to the cell viability preservation in the fabrication process. Discussions on further improvements of bioRP technologies are given and ongoing research into mechanical cell damage mechanism are also suggested in this review.
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26
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Sakurai K, Hoffecker IT, Iwata H. Long term culture of cells patterned on glass via membrane-tethered oligonucleotides. Biomaterials 2012; 34:361-70. [PMID: 23092858 DOI: 10.1016/j.biomaterials.2012.09.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2012] [Accepted: 09/29/2012] [Indexed: 10/27/2022]
Abstract
Oligonucleotide-based membrane inserts can be used as tethers to control attachment of cells to patterned surfaces without interfering with internal cytoskeletal modes of adhesion. Such control can be employed as a means for study of cell-cell interactions or side-by-side co-culture of different cell types without separation/sorting. While there is utility for cell patterning methods decoupled from natural cytoskeletal mechanisms, the consequences of maintaining this artificially induced state of attachment remains unexplored. We present a method for the 2-dimensional patterning of cells via hybridization of membrane-tethered single stranded oligonucleotides to complimentary single stranded oligonucleotides bound to optically transparent glass substrates which allowed us to characterize the long term culture of patterned HEK293 cells. Patterned substrates immersed in FBS-containing media are shown to permit the adsorption of adhesive serum proteins which allowed for the spreading and engagement of natural cytoskeletal adhesion modes in cells initially attached only through DNA hybridization. We show that the coexisting modes of attachment result in competition between membrane-bound tethers and natural cytoskeletal adhesion machinery as cells attempt to migrate away from their initial points of attachment. This competition ends in the escape of cells from their designated patterns and the 'winning out' of cytoskeletal migration forces over the affinity of lipid inserts for the cell membrane.
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Affiliation(s)
- Kengo Sakurai
- Department of Reparative Materials, Institute for Frontier Medical Sciences, Kyoto University, Sakyo-Ku, Kyoto, Japan
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27
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Kim C, Bang JH, Kim YE, Lee SH, Kang JY. On-chip anticancer drug test of regular tumor spheroids formed in microwells by a distributive microchannel network. LAB ON A CHIP 2012; 12:4135-42. [PMID: 22864534 DOI: 10.1039/c2lc40570a] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This paper proposes a new cytotoxicity assay in a microfluidic device with microwells and a distributive microfluidic channel network for the formation of cancer cell spheroids. The assay can generate rapid and uniform cell clusters in microwells and test in situ cytotoxicity of anticancer drugs including sequential drug treatments, long term culture of spheroids and cell viability assays. Inlet ports are connected to the microwells by a hydraulic resistance network. This uniform distribution of cell suspensions results in regular spheroid dimensions. Injected cancer cells were trapped in microwells, and aggregated into tumor spheroids within 3 days. A cytotoxicity test of the spheroids in microwells was subsequently processed in the same device without the extraction of cells. The in situ cytotoxicity assay of tumor spheroids in microwells was comparable with the MTT assay on hanging drop spheroids using a conventional 96-well plate. It was observed that the inhibition rate of the spheroids was less than that in the 2D culture dish and the effect on tumor spheroids was different depending on the anticancer drug. This device could provide a convenient in situ assay tool to assess the cytotoxicity of anticancer drugs on tumor spheroids, offering more information than the conventional 2D culture plate.
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Affiliation(s)
- Choong Kim
- Center for BioMicrosystem, Korea Institute of Science and Technology, Korea
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28
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Sugaya S, Kakegawa S, Fukushima S, Yamada M, Seki M. Micropatterning of hydrogels on locally hydrophilized regions on PDMS by stepwise solution dipping and in situ gelation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:14073-80. [PMID: 22991929 DOI: 10.1021/la3014706] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This study presents a simple but highly versatile method of fabricating picoliter-volume hydrogel patterns on poly(dimethylsiloxane) (PDMS) substrates. Hydrophilic regions were prepared on hydrophobic PDMS plates by trapping and melting functional polymer particles and performing subsequent reactions with partially oxidized dextran. Small aliquots of a gelation solution were selectively trapped on the hydrophilic areas by a simple dipping process that was utilized to make thin hydrogel patterns by the in situ gelation of a sol solution. Using this process, we successfully formed calcium alginate, collagen I, and chitosan hydrogels with a thickness of several micrometers and shapes that followed the hydrophilized regions. In addition, alginate and collagen gel patterns were used to capture cells with different adhesion properties selectively on or off the hydrogel structures. The presented strategy could be applicable to the preparation of a variety of hydrogels for the development of functional biosensors, bioreactors, and cell cultivation platforms.
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Affiliation(s)
- Sari Sugaya
- Department of Applied Chemistry and Biotechnology, Graduate School of Engineering, Chiba University, Inage-ku, Chiba, Japan
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Bax DV, Tipa RS, Kondyurin A, Higgins MJ, Tsoutas K, Gelmi A, Wallace GG, McKenzie DR, Weiss AS, Bilek MMM. Cell patterning via linker-free protein functionalization of an organic conducting polymer (polypyrrole) electrode. Acta Biomater 2012; 8:2538-48. [PMID: 22426287 DOI: 10.1016/j.actbio.2012.03.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Revised: 03/11/2012] [Accepted: 03/12/2012] [Indexed: 01/25/2023]
Abstract
The interaction of proteins and cells with polymers is critical to their use in scientific and medical applications. In this study, plasma immersion ion implantation (PIII) was used to modify the surface of the conducting polymer, polypyrrole, which possesses electrical properties. PIII treatment enabled persistent, covalent binding of the cell adhesive protein, tropoelastin, without employing chemical linking molecules. In contrast tropoelastin was readily eluted from the untreated surface. Through this differential persistence of binding, surface bound tropoelastin supported cell adhesion and spreading on the PIII treated but not the untreated polypyrrole surface. The application of a steel shadow mask during PIII treatment allowed for spatial definition of tropoelastin exclusively to PIII treated regions. The general applicability of this approach to other extracellular matrix proteins was illustrated using collagen I, which displayed similar results to tropoelastin but required extended washing conditions. This approach allowed fine patterning of cell adhesion and spreading to tropoelastin and collagen, specifically on PIII treated polypyrrole regions. We therefore present a methodology to alter the functionality of polypyrrole surfaces, generating surfaces that can spatially control cellular interactions through protein functionalization with the potential for electrical stimulation.
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Affiliation(s)
- Daniel V Bax
- Applied and Plasma Physics, School of Physics, University of Sydney, NSW, Australia.
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30
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Wang DY, Huang YY. MICROFLUIDIC PATTERNING ENGRAVED BY THE DIRECT-WRITE CO2 LASER MICROMACHINING FOR CELL COCULTURE. BIOMEDICAL ENGINEERING-APPLICATIONS BASIS COMMUNICATIONS 2012. [DOI: 10.4015/s1016237208000829] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Cells respond dynamically to their microenvironment with biochemical, mechanical, and topological cues. Microfluidic patterned cells and biological molecules are promising methods for evaluating the interactions among cells, signals, and substrates. In this study, direct-write CO 2 laser micromachining to engrave microchannels onto polydimethylsiloxane using 60% laser power from 12 W resource is introduced. The microfluidic channels are applied to pattern NIH 3T3 cell fibroblasts, neuron cells from the brain tissue of embryonic mice and mesenchymal stem cells (MSCs) from mice expressing a green fluorescent protein. The patterned cells are organized at a width of 500 μm and separated by a width of 600 μm. MSCs and neuron cells were microfluidic patterned and cocultured at the same time to provide access for evaluating transdifferentiated MSCs after coculture with neuron cells. We study microfluidic patterned cells with laser engraved channels to evaluate the migration of proliferated cells, cross-talk between adjacent cells, induction from secreted factors, and documented the plasticity of cell behavior on the well-defined boundaries of seeded cells.
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Affiliation(s)
- De-Yao Wang
- Institute of Biomedical Engineering, College of Engineering, College of Medicine, National Taiwan University, Taiwan, Republic of China
| | - Yi-You Huang
- Institute of Biomedical Engineering, College of Engineering, College of Medicine, National Taiwan University, Taiwan, Republic of China
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31
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Zorlutuna P, Annabi N, Camci-Unal G, Nikkhah M, Cha JM, Nichol JW, Manbachi A, Bae H, Chen S, Khademhosseini A. Microfabricated biomaterials for engineering 3D tissues. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:1782-804. [PMID: 22410857 PMCID: PMC3432416 DOI: 10.1002/adma.201104631] [Citation(s) in RCA: 269] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Indexed: 05/04/2023]
Abstract
Mimicking natural tissue structure is crucial for engineered tissues with intended applications ranging from regenerative medicine to biorobotics. Native tissues are highly organized at the microscale, thus making these natural characteristics an integral part of creating effective biomimetic tissue structures. There exists a growing appreciation that the incorporation of similar highly organized microscale structures in tissue engineering may yield a remedy for problems ranging from vascularization to cell function control/determination. In this review, we highlight the recent progress in the field of microscale tissue engineering and discuss the use of various biomaterials for generating engineered tissue structures with microscale features. In particular, we will discuss the use of microscale approaches to engineer the architecture of scaffolds, generate artificial vasculature, and control cellular orientation and differentiation. In addition, the emergence of microfabricated tissue units and the modular assembly to emulate hierarchical tissues will be discussed.
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Affiliation(s)
- Pinar Zorlutuna
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA
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Liebschner MAK, Wettergreen M. Scaffold pore space modulation through intelligent design of dissolvable microparticles. Methods Mol Biol 2012; 868:71-89. [PMID: 22692605 DOI: 10.1007/978-1-61779-764-4_5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The goal of this area of research is to manipulate the pore space of scaffolds through the application of an intelligent design concept on dissolvable microparticles. To accomplish this goal, we developed an efficient and repeatable process for fabrication of microparticles from multiple materials using a combination of rapid prototyping (RP) and soft lithography. Phase changed 3D printing was used to create masters for PDMS molds. A photocrosslinkable polymer was then delivered into these molds to make geometrically complex 3D microparticles. This repeatable process has demonstrated to generate the objects with greater than 95% repeatability with complete pattern transfer. This process was illustrated for three different shapes of various complexities. The shapes were based on the extrusion of 2D shapes. This may allow simplification of the fabrication process in the future combined with a direct transfer of the findings. Altering the shapes of particles used for porous scaffold fabrication will allow for tailoring of the pore shapes, and therefore their biological function within a porous tissue engineering scaffold. Through permeation experiments, we have shown that the pore geometry may alter the permeability coefficient of scaffolds while influencing mechanical properties to a lesser extent. By selecting different porogen shapes, the nutrition transport and scaffold degradation can be significantly influenced with minimal effect on the mechanical integrity of the construct. In addition, the different shapes may allow a control of drug release by modifying their surface-to-volume ratio, which could modulate drug delivery over time. While soft lithography is currently used with photolithography, its high precision is offset by high cost of production. The employment of RP to a specific resolution offers a much less expensive alternative with increased throughput due to the speed of current RP systems.
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33
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Directed cell attachment by tropoelastin on masked plasma immersion ion implantation treated PTFE. Biomaterials 2011; 32:6710-8. [DOI: 10.1016/j.biomaterials.2011.05.060] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Accepted: 05/20/2011] [Indexed: 01/09/2023]
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Evaluation of transdifferentiation from mesenchymal stem cells to neuron-like cells using microfluidic patterned co-culture system. Biomed Microdevices 2011; 13:517-26. [PMID: 21347824 DOI: 10.1007/s10544-011-9520-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We design a microfluidic patterned co-culture system for mouse mesenchymal stem cells (mMSCs) and neural cells to demonstrate the paracrine effects produced by the neural cells in facilitating the transdifferentiation from mMSCs to neuron-like cells. Neural cells and mMSC are orderly patterned in the microfluidic co-culturing system without direct cell contact. This configuration provides us to calculate the percentage of neural marker transdifferentiated by mMSCs easily. We obtain higher transdifferentiated ratio of mMSC in the microfluidic co-culturing system (beta III tubulin: 67%; glial fibrillary acidic protein (GFAP): 86.2%) as compared with the traditional transwell co-culturing system (beta III tubulin: 59.8%; GFAP: 52.0%), which is similar to the spontaneous neural marker expression in the undifferentiated MSCs (beta III tubulin: 47.5%; GFAP: 60.1%). Furthermore, mMSCs expressing green fluorescent protein and neural cells expressing red fluorescent protein were also used in our co-culture system to demonstrate the rarely occurring or observed cell fusion phenomenon. The results show that the co-cultured neural cells increased the transdifferentiation efficiency of mMSCs from soluble factors secreted by neural cells.
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35
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Dawood AF, Lotfi P, Dash SN, Kona SK, Nguyen KT, Romero-Ortega MI. VEGF Release in Multiluminal Hydrogels Directs Angiogenesis from Adult Vasculature In Vitro. Cardiovasc Eng Technol 2011. [DOI: 10.1007/s13239-011-0048-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Choudhury D, Mo X, Iliescu C, Tan LL, Tong WH, Yu H. Exploitation of physical and chemical constraints for three-dimensional microtissue construction in microfluidics. BIOMICROFLUIDICS 2011; 5:22203. [PMID: 21799710 PMCID: PMC3145229 DOI: 10.1063/1.3593407] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2011] [Accepted: 05/02/2011] [Indexed: 05/06/2023]
Abstract
There are a plethora of approaches to construct microtissues as building blocks for the repair and regeneration of larger and complex tissues. Here we focus on various physical and chemical trapping methods for engineering three-dimensional microtissue constructs in microfluidic systems that recapitulate the in vivo tissue microstructures and functions. Advances in these in vitro tissue models have enabled various applications, including drug screening, disease or injury models, and cell-based biosensors. The future would see strides toward the mesoscale control of even finer tissue microstructures and the scaling of various designs for high throughput applications. These tools and knowledge will establish the foundation for precision engineering of complex tissues of the internal organs for biomedical applications.
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Abstract
To be applied in sufficient numbers for regenerative medicine, primary mesenchymal stem cells (MSCs) need to be amplified in culture. Standard cell culture involves regular passing because MSC proliferation in size-limited culture vessels stagnates due to contact inhibition of growth. The use of harmful enzymes for passaging and the mechanical properties of standard culture vessels change the MSC phenotype. Initially, fast growing multipotent and regenerative MSCs will turn into slowly growing cells with reduced multipotency and fibrotic character. We here describe an innovative culture system that maintains overall constant cell densities which are near-optimal for proliferation, while preventing contact-inhibition of cell growth. This is achieved by dynamically enlarging a novel highly elastic culture dish using a motorized mechanical device and adapting the culture surface to the increasing cell numbers. Dynamic MSC culture expansion reduces the number of enzymatic passages by a factor of 3 and delivers higher MSC yields than conventional culture. On the expanded culture surface, MSCs maintain stem cell characteristics and high growth rates over months and are still inducible to follow different lineages thereafter.
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Affiliation(s)
- Hicham Majd
- Laboratory of Tissue Repair and Regeneration, Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, M5S 3E2, ON, Toronto, Canada
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38
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Yasukawa T, Suzuki M, Shiku H, Matsue T. Fabrication of Line and Grid Patterns with Cells Based on Negative Dielectrophoresis. JOURNAL OF ROBOTICS AND MECHATRONICS 2010. [DOI: 10.20965/jrm.2010.p0613] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The rapid, direct fabrication of two-dimensional line patterns with biological cells in a culture medium we report here is based on negative dielectrophoresis (n-DEP). It easily creates a versatile cell micropattern without specially pretreating culture slides. When an alternating electric field, typically 1 MHz, was applied to an InterDigitated band Array (IDA) electrode with four subunits, n-DEP force directs cells toward a weaker of electric field strength region. Cells aligned above attracted bands within 1min. Applying AC voltage for 5 min enables cells to adhere to the cell culture slide. When 12 Vpp is applied, 45-65% cells remain in line after the device is washed and disassembled. Resulting adsorbed cell lines were immersed in a medium to culture cells. n-DEP patterning did not significantly damage cells for growth because of the cell number increased by growth. We fabricated cell grid patterns to demonstrate formation of different patterns. After the device was disassembled and excess cells removed, the culture slide was reassembled with the IDA electrode and was rotated 90° to the previous setup. Second cells were patterned in lines the same way, forming grid patterns on the slide. Micropatterns aligned cells at desired locations enabling a biomimetic structure to be generated with biological functions and to detect cellular response to many kinds of drugs for simultaneous high-throughput screening.
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40
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Dangaria SJ, Ito Y, Yin L, Valdré G, Luan X, Diekwisch TGH. Apatite microtopographies instruct signaling tapestries for progenitor-driven new attachment of teeth. Tissue Eng Part A 2010; 17:279-90. [PMID: 20795795 DOI: 10.1089/ten.tea.2010.0264] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Dimension and structure of extracellular matrix surfaces have powerful influences on cell shape, adhesion, and gene expression. Here we show that natural tooth root topographies induce integrin-mediated extracellular matrix signaling cascades in tandem with cell elongation and polarization to generate physiological periodontium-like tissues. In this study we replanted surface topography instructed periodontal progenitors into rat alveolar bone sockets for 8 and 16 weeks, resulting in complete reattachment of tooth roots to the surrounding alveolar bone with a periodontal fiber apparatus closely matching physiological controls along the entire root surface. Displacement studies and biochemical analyses confirmed that progenitor-based engineered periodontal tissues were similar to control teeth and uniquely derived from preimplantation green fluorescent protein (GFP)-labeled progenitors. Together, these studies illustrate the capacity of natural extracellular surface topographies to instruct progenitor cell populations to fully regenerate complex cellular and structural morphologies of tissues once lost to disease. We suggest that our strategy could be used for the replantation of teeth lost due to trauma or as a novel approach for tooth replacement using tooth-shaped replicas.
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Affiliation(s)
- Smit J Dangaria
- Brodie Laboratory for Craniofacial Genetics, University of Illinois at Chicago, Chicago, Illinois, USA
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41
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Wang X, Yan Y, Zhang R. Recent trends and challenges in complex organ manufacturing. TISSUE ENGINEERING PART B-REVIEWS 2010; 16:189-97. [PMID: 19824803 DOI: 10.1089/ten.teb.2009.0576] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Presently, there is a recognized and imperative need for bioartificial organs. The technological advances in transgenosis, tissue engineering, and rapid prototyping have led to the development of spatially complex tissues. An ideal artificial organ should provide nutrient transport system, mechanical stable architecture, and synergetic multicellular organization in one construct. The multinozzle rapid prototyping technique simultaneously assembles vascular systems including hierarchical multicellular structures in an automated and reproducible manner and offers an effective way for treating organ failures. In this article, a brief overview of the recent trends and outstanding challenges in organ manufacturing is provided. From the viewpoint of disciplinary crossing, integration, and development, future directions in the coming years were pointed out.
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Affiliation(s)
- Xiaohong Wang
- Center of Organ Manufacturing & Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, P.R. China
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42
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Saxena AK. Tissue engineering and regenerative medicine research perspectives for pediatric surgery. Pediatr Surg Int 2010; 26:557-73. [PMID: 20333389 DOI: 10.1007/s00383-010-2591-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/02/2010] [Indexed: 01/28/2023]
Abstract
Tissue engineering and regenerative medicine research is being aggressively pursued in attempts to develop biological substitutes to replace lost tissue or organs. Remarkable degrees of success have been achieved in the generation of a variety of tissues and organs as a result of concerted contributions by multidisciplinary groups in the field of biotechnology. Engineering of an organ is a complex process which is initiated by appropriate sourcing of cells and their controlled proliferation to achieve critical numbers for seeding on biodegradable scaffolds in order to create cell-scaffold constructs, which are thereafter maintained in bioreactors to generate tissues identical to those required for replacement. Extensive efforts in understanding the characteristics of cells and their interaction with specifically tailored scaffolds holds the key to their attachment, controlled proliferation and differentiation, intercommunication, and organization to form tissues. The demand for tissue-engineered organs is enormous and this technology holds the promise to supply customized organs to overcome the severe shortages that are currently faced by the pediatric patient, especially due to organ-size mismatch. The contemporary state of tissue-engineering technology presented in this review summarizes the advances in the various areas of regenerative medicine and addresses issues that are associated with its future implementation in the pediatric surgical patient.
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Affiliation(s)
- Amulya K Saxena
- Experimental Fetal Surgery and Tissue Engineering Unit, Department of Pediatric and Adolescent Surgery, Medical University of Graz, Auenbruggerplatz-34, 8036, Graz, Austria.
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43
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Ishizaki T, Saito N, Takai O. Correlation of cell adhesive behaviors on superhydrophobic, superhydrophilic, and micropatterned superhydrophobic/superhydrophilic surfaces to their surface chemistry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:8147-54. [PMID: 20131757 DOI: 10.1021/la904447c] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A micropatterned superhydrophobic/superhydrophilic surface was successfully fabricated by plasma CVD and VUV irradiation. Physicochemical properties of the superhydrophobic, superhydrophilic, and superhydrophobic/superhydrophilic surfaces were investigated. The roughness structures on the superhydrophilic surface remained intact compared to those of the superhydrophobic surface. The micropatterned superhydrophobic/superhydrophilic surface was used as a scaffold of cell culture. On the micropatterned surface, the cells attached to the superhydrophilic regions in a highly selective manner, forming circular microarrays of the cells corresponding to the pattern. On the micropatterned surface with pattern distances of 200 microm between superhydrophilic regions, the cells adhered on the superhydrophilic regions and partly extended to the neighboring cells. In contrast, when the pattern distances between the superhydrophilic regions were more than 400 microm, the cells did not extend to the neighboring cells. Cell adhesion behaviors on superhydrophobic and superhydrophilic surfaces were also examined. The cells adhered and proliferated on both superhydrophobic and superhydrophilic surfaces. However, on the superhydrophobic surface, constant contact to facilitate cell division and proliferation was required. On the other hand, the cells easily adhered and proliferated on the superhydrophilic surface immediately after seeding. These differences in cell adhesion behavior induced site-selective cell adhesion on the superhydrophilic regions. Furthermore, protein adsorption behavior that plays an important role in cell adhesion on flat hydrophobic and hydrophilic surface was also examined. The amounts of the protein adsorption on the flat hydrophilic surface were much greater than those on the flat hydrophobic surface.
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Affiliation(s)
- Takahiro Ishizaki
- National Institute of Advanced Industrial Science and Technology, 2266-98, Anagahora, Shimo-Shidami, Moriyama-ku, Nagoya 463-8560, Japan.
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44
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Microengineering Approach for Directing Embryonic Stem Cell Differentiation. STUDIES IN MECHANOBIOLOGY, TISSUE ENGINEERING AND BIOMATERIALS 2010. [DOI: 10.1007/8415_2010_7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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45
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Micro- and nanotechnologies for intelligent and responsive biomaterial-based medical systems. Adv Drug Deliv Rev 2009; 61:1391-401. [PMID: 19758574 DOI: 10.1016/j.addr.2009.09.002] [Citation(s) in RCA: 174] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2009] [Revised: 08/29/2009] [Accepted: 09/04/2009] [Indexed: 12/12/2022]
Abstract
Advances in medical treatments of a wide variety of pathophysiological conditions require the development of better therapeutic agents, as well as a combination of the required therapeutic agents with device-integrated biomaterials that can serve as sensors and carriers. Combination of micro- and nano-fabricated systems with intelligent biomaterials that have the ability to sense and respond is a promising avenue for the development of better diagnostic and therapeutic medical systems. Micro- and nano-electromechanical systems (MEMs and NEMs) are now becoming a family of potentially powerful new technologies for drug delivery, diagnostic tools, and tissue engineering. Improvements in micro- and nano-fabrication technologies have enhanced the ability to create better performing therapeutic systems for numerous pathophysiological applications. More importantly, MEMS- and NEMS-based tissue regeneration scaffolds, biosensors, and drug delivery devices provide new opportunities to mimic the natural intelligence and response of biological systems.
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46
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Luan X, Dangaria S, Ito Y, Walker CG, Jin T, Schmidt MK, Galang MT, Druzinsky R. Neural crest lineage segregation: a blueprint for periodontal regeneration. J Dent Res 2009; 88:781-91. [PMID: 19767574 DOI: 10.1177/0022034509340641] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
During the recent decade, the periodontal attachment apparatus has become one of the premier areas of the body for the development of novel tissue-engineering strategies. In the present review, we describe a developmental biology approach to characterize current concepts in periodontal regeneration and to discuss strategies for future applications in periodontal therapies. To decipher the developmental make-up of the periodontal region, we have followed the path of the migratory neural crest, since it gives rise to periodontal progenitor tissues, which in turn are subjected to the influence of diverse craniofacial extracellular matrices and peptide growth factors. Based on this developmental perspective, we have conducted a systematic analysis of the factors, progenitor cells, and matrices used in current periodontal tissue-engineering approaches. We propose that the developmental history of a tissue is a highly instructive design template for the discovery of novel bioengineering tools and approaches.
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Affiliation(s)
- X Luan
- Brodie Laboratory for Craniofacial Genetics, Department of Oral Biology, UIC College of Dentistry, The University of Illinois at Chicago, 801 South Paulina, M/C 841, Chicago, IL 60612, USA.
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47
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Slaughter BV, Khurshid SS, Fisher OZ, Khademhosseini A, Peppas NA. Hydrogels in regenerative medicine. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2009; 21:3307-29. [PMID: 20882499 PMCID: PMC4494665 DOI: 10.1002/adma.200802106] [Citation(s) in RCA: 1752] [Impact Index Per Article: 116.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Hydrogels, due to their unique biocompatibility, flexible methods of synthesis, range of constituents, and desirable physical characteristics, have been the material of choice for many applications in regenerative medicine. They can serve as scaffolds that provide structural integrity to tissue constructs, control drug and protein delivery to tissues and cultures, and serve as adhesives or barriers between tissue and material surfaces. In this work, the properties of hydrogels that are important for tissue engineering applications and the inherent material design constraints and challenges are discussed. Recent research involving several different hydrogels polymerized from a variety of synthetic and natural monomers using typical and novel synthetic methods are highlighted. Finally, special attention is given to the microfabrication techniques that are currently resulting in important advances in the field.
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Affiliation(s)
- Brandon V. Slaughter
- Department of Biomedical Engineering, C0800, The University of Texas at
Austin, Austin, TX 78712 (USA)
| | - Shahana S. Khurshid
- Department of Biomedical Engineering, C0800, The University of Texas at
Austin, Austin, TX 78712 (USA)
| | - Omar Z. Fisher
- Department of Biomedical Engineering, C0800, The University of Texas at
Austin, Austin, TX 78712 (USA)
| | - Ali Khademhosseini
- Center for Biomedical Engineering, Department of Medicine, Brigham and
Women’s Hospital, Harvard Medical School, Harvard-MIT Division of Health
Sciences and Technology, Massachusetts, Institute of Technology, Cambridge, MA 02139
(USA)
| | - Nicholas A. Peppas
- Biomaterials, Drug Delivery, Bionanotechnology, and Molecular, Recognition
Laboratories, Department of Chemical Engineering, C0400, The University of Texas at
Austin, Austin, TX 78712 (USA)
- Department of Pharmaceutics, C0400, The University of Texas at Austin,
Austin, TX 78712 (USA)
- Department of Biomedical Engineering, C0800, The University of Texas at
Austin, Austin, TX 78712 (USA)
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48
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Brown DA, MacLellan WR, Dunn JCY, Wu BM, Beygui RE. Hypoxic Cell Death is Reduced by pH Buffering in a Model of Engineered Heart Tissue. ACTA ACUST UNITED AC 2009; 36:94-113. [DOI: 10.1080/10731190801932090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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49
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van Noort D, Ong SM, Zhang C, Zhang S, Arooz T, Yu H. Stem cells in microfluidics. Biotechnol Prog 2009; 25:52-60. [PMID: 19205022 DOI: 10.1002/btpr.171] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
With the introduction of microtechnology and microfluidic platforms for cell culture, stem cell research can be put into a new context. Inside microfluidics, microenvironments can be more precisely controlled and their influence on cell fate studied. Microfluidic devices can be made transparent and the cells monitored real time by imaging, using fluorescence markers to probe cell functions and cell fate. This article gives a perspective on the yet untapped utility of microfluidic devices for stem cell research. It will guide the biologists through some basic microtechnology and the application of microfluidics to cell research, as well as highlight to the engineers the cell culture capabilities of microfluidics.
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Affiliation(s)
- Danny van Noort
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669, Singapore.
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50
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Paguirigan AL, Beebe DJ. From the cellular perspective: exploring differences in the cellular baseline in macroscale and microfluidic cultures. Integr Biol (Camb) 2009; 1:182-95. [PMID: 20023802 DOI: 10.1039/b814565b] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Microfluidic devices for cell culture based assays provide new types of engineered microenvironments and new methods for controlling and quantifying cellular responses to these microenvironments. However, without an understanding of the effects of the microenvironments present in microdevices from a cellular perspective, it will be challenging to integrate work done in microdevices with biological data obtained via traditional methods. With the adaptation and validation of In Cell Westerns (ICWs) and in situ analysis techniques to microfluidic devices, we can begin to look at a variety of cellular responses to microcultures. Here we observe several differences in proliferation, glucose metabolism, signaling pathway activation and protein expression levels between cells cultured in traditional macroscale cultures and in microfluidic cultures. The issues of glucose starvation, growth factor restriction, volume density and effects of interactions with poly(dimethylsiloxane) (PDMS) were examined to determine the relative importance of each to cell behavior. Changes in glucose metabolism, insensitivity to volume density or media supplementation, and finally reduced proliferation as the exposure to PDMS increased, suggests that perhaps interactions between media/cells and this commonly employed polymer may be significant for some cell based assays. The differences between cells in macroscale and microfluidic cultures suggest that the cellular baseline may be substantially altered in microcultures due to both inherent differences in scale as well as material differences. The observations highlight the need to biologically validate micofluidic devices for cell based assays in order to accurately interpret the data obtained with them in the context of traditional macroculture data. Additional areas of study that will further characterize and validate microscale culture are discussed.
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Affiliation(s)
- Amy L Paguirigan
- Department of Biomedical Engineering, University of Wisconsin - Madison, WI, USA
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