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Azargoonjahromi A, Abutalebian F, Hoseinpour F. The role of resveratrol in neurogenesis: a systematic review. Nutr Rev 2024:nuae025. [PMID: 38511504 DOI: 10.1093/nutrit/nuae025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024] Open
Abstract
CONTEXT Resveratrol (RV) is a natural compound found in grapes, wine, berries, and peanuts and has potential health benefits-namely, neurogenesis improvement. Neurogenesis, which is the process through which new neurons or nerve cells are generated in the brain, occurs in the subventricular zone and hippocampus and is influenced by various factors. RV has been shown to increase neural stem cell proliferation and survival, improving cognitive function in hippocampus-dependent tasks. Thus, to provide a convergent and unbiased conclusion of the available evidence on the correlation between the RV and neurogenesis, a systematic review needs to be undertaken meticulously and with appropriate attention. OBJECTIVE This study aimed to systematically review any potential connection between the RV and neurogenesis in animal models. DATA SOURCES AND EXTRACTION Based on the particular selection criteria, 8 original animal studies that investigated the relationship between RV and neurogenesis were included. Studies written in English and published in peer-reviewed journals with no restrictions on the starting date of publication on August 17, 2023, were searched in the Google Scholar and PubMed databases. Furthermore, data were extracted and analyzed independently by 2 researchers and then reviewed by a third researcher, and discrepancies were resolved by consensus. This project followed PRISMA reporting standards. DATA ANALYSIS In the studies analyzed in this review, there is a definite correlation between RV and neurogenesis, meaning that RV intake, irrespective of the mechanisms thereof, can boost neurogenesis in both the subventricular zone and hippocampus. CONCLUSION This finding, albeit with some limitations, provides a plausible indication of RV's beneficial function in neurogenesis. Indeed, RV intake may result in neurogenesis benefits-namely, cognitive function, mood regulation, stress resilience, and neuroprotection, potentially preventing cognitive decline.
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Affiliation(s)
| | - Fatemeh Abutalebian
- Department of Biotechnology and Medicine, Islamic Azad University of Tehran Central Branch, Tehran, Iran
| | - Fatemeh Hoseinpour
- Department of Occupational Therapy, Semnan University of Medical Sciences and Health Services, Semnan, Iran
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Andolfi A, Arnaldi P, Lisa DD, Pepe S, Frega M, Fassio A, Lagazzo A, Martinoia S, Pastorino L. A micropatterned thermoplasmonic substrate for neuromodulation of in vitro neuronal networks. Acta Biomater 2023; 158:281-291. [PMID: 36563774 DOI: 10.1016/j.actbio.2022.12.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 12/05/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
Understanding how the spatial organization of a neural network affects its activity represents a leading issue in neuroscience. Thanks to their accessibility and easy handling, in vitro studies remain an essential tool to investigate the relationship between the structure and function of a neuronal network. Among all the patterning techniques, ink-jet printing acquired great interest thanks to its direct-write approach, which allows the patterned substrate realization without mold, leading to a considerable saving of both cost and time. However, the inks commonly used give the possibility to control only the structure of a neuronal network, leaving aside the functional aspect. In this work, we synthesize a photosensitive ink combining the rheological and bioadhesive properties of chitosan with the plasmonic properties of gold nanorods, obtaining an ink able to control both the spatial organization of a two-dimensional neuronal network and its activity through photothermal effect. After the ink characterization, we demonstrate that it is possible to print, with high precision, different geometries on a microelectrode array. In this way, it is possible obtaining a patterned device to control the structure of a neuronal network, to record its activity and to modulate it via photothermal effect. Finally, to our knowledge, we report the first evidence of photothermal inhibition of human neurons activity. STATEMENT OF SIGNIFICANCE: Patterned cell cultures remain the most efficient and simple tool for linking structural and functional studies, especially in the neuronal field. Ink-jet printing is the technique with which it is possible to realize patterned structures in the fastest, simple, versatile and low-cost way. However, the inks currently used permit the control only of the neuronal network structure but do not allow the control-modulation of the network activity. In this study, we realize and characterize a photosensitive bioink with which it is possible to drive both the structure and the activity of a neuronal network. Moreover, we report the first evidence of activity inhibition by the photothermal effect on human neurons as far as we know.
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Affiliation(s)
- Andrea Andolfi
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, Genoa, Italy.
| | - Pietro Arnaldi
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, Genoa, Italy.
| | - Donatella Di Lisa
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, Genoa, Italy.
| | - Sara Pepe
- Department of Experimental Medicine, University of Genoa, Genoa, Italy.
| | - Monica Frega
- Department of Clinical Neurophysiology, University of Twente, Enschede, the Netherlands.
| | - Anna Fassio
- Department of Experimental Medicine, University of Genoa, Genoa, Italy.
| | - Alberto Lagazzo
- Department of Civil, Chemical and Environmental Engineering (DICCA), University of Genoa, Genoa, Italy.
| | - Sergio Martinoia
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, Genoa, Italy.
| | - Laura Pastorino
- Department of Informatics, Bioengineering, Robotics and Systems Engineering (DIBRIS), University of Genoa, Genoa, Italy.
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Hong N, Nam Y. Neurons-on-a-Chip: In Vitro NeuroTools. Mol Cells 2022; 45:76-83. [PMID: 35236782 PMCID: PMC8906998 DOI: 10.14348/molcells.2022.2023] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 12/24/2021] [Accepted: 02/15/2022] [Indexed: 11/27/2022] Open
Abstract
Neurons-on-a-Chip technology has been developed to provide diverse in vitro neuro-tools to study neuritogenesis, synaptogensis, axon guidance, and network dynamics. The two core enabling technologies are soft-lithography and microelectrode array technology. Soft lithography technology made it possible to fabricate microstamps and microfluidic channel devices with a simple replica molding method in a biological laboratory and innovatively reduced the turn-around time from assay design to chip fabrication, facilitating various experimental designs. To control nerve cell behaviors at the single cell level via chemical cues, surface biofunctionalization methods and micropatterning techniques were developed. Microelectrode chip technology, which provides a functional readout by measuring the electrophysiological signals from individual neurons, has become a popular platform to investigate neural information processing in networks. Due to these key advances, it is possible to study the relationship between the network structure and functions, and they have opened a new era of neurobiology and will become standard tools in the near future.
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Affiliation(s)
- Nari Hong
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Korea
| | - Yoonkey Nam
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- KAIST Institute for Institute for Health Science and Technology, KAIST, Daejeon 34141, Korea
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4
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Thermoplasmonic neural chip platform for in situ manipulation of neuronal connections in vitro. Nat Commun 2020; 11:6313. [PMID: 33298939 PMCID: PMC7726146 DOI: 10.1038/s41467-020-20060-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 11/12/2020] [Indexed: 01/14/2023] Open
Abstract
Cultured neuronal networks with a controlled structure have been widely studied as an in vitro model system to investigate the relationship between network structure and function. However, most cell culture techniques lack the ability to control network structures during cell cultivation, making it difficult to assess functional changes induced by specific structural changes. In this study, we present an in situ manipulation platform based on gold-nanorod-mediated thermoplasmonics to interrogate an in vitro network model. We find that it is possible to induce new neurite outgrowths, eliminate interconnecting neurites, and estimate functional relationships in matured neuronal networks. This method is expected to be useful for studying functional dynamics of neural networks under controlled structural changes. Cultured neuron networks provide insight into network structure and function, but the ability to control network topology is a challenge. Here the authors develop a nanorod-mediated thermoplasmonics platform that enables the formation of new connections, the abolishment of existing connections, and the modulation of network activity during cultivation.
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Jalili K, Abbasi F, Behboodpour L. In situ probing of switchable nanomechanical properties of responsive high-density polymer brushes on poly(dimethylsiloxane): An AFM nanoindentation approach. J Mech Behav Biomed Mater 2019; 93:118-129. [PMID: 30785077 DOI: 10.1016/j.jmbbm.2019.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 01/27/2019] [Accepted: 02/03/2019] [Indexed: 12/01/2022]
Abstract
Nanomechanical characteristics of end grafted polymer brushes were studied by AFM based, colloidal probe nanoindentation measurements. A high-density polymer brush of poly(2-hydroxyethyl methacrylate) (PHEMA) was precisely prepared on the surface of a flexible poly(dimethylsiloxane) (PDMS) substrate oxidized in ultraviolet/ozone (UVO). Exposure times less than 10min resulted in laterally homogeneous oxidized surfaces, characterized by a SiOx thickness ∼35nm and an increased modulus up to 9MPa, as shown by AFM nanoindentation measurements. We have demonstrated that a high surface density of up to ∼0.63chains/nm2 of the well-defined PHEMA brushes can be grown from the surface of oxidized PDMS by surface-initiated atom transfer radical polymerization (SI-ATRP) from trimethoxysilane derivatives mixed-SAM. The reversible nanomechanical changes of PHEMA layer between extended (hydrated state) and collapsed (dehydrated state) chain upon immersing in selective and non-selective solvents were investigated by in situ AFM nanoindentation analysis in liquid environments. The elastic modulus derived from force-indentation curves obtained for swollen PHEMA grafted chains in water was estimated to be equal 2.7±0.2MPa, which is almost two orders of magnitude smaller than the modulus of dry PHEMA brush. Additionally, under cyclohexane immersion, the modulus of the PHEMA layer decreased by one order of magnitude, indicating a more compact chain packing at the PDMS surface.
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Affiliation(s)
- K Jalili
- Institute of Polymeric Materials, Sahand University of Technology, P.O.Box 51335-1996, Tabriz, Iran; Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran; Max Planck Institute for Polymer Research, 10 Ackermannweg, 55128 Mainz, Germany.
| | - F Abbasi
- Institute of Polymeric Materials, Sahand University of Technology, P.O.Box 51335-1996, Tabriz, Iran; Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran
| | - L Behboodpour
- Institute of Polymeric Materials, Sahand University of Technology, P.O.Box 51335-1996, Tabriz, Iran; Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran
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Badea A, McCracken JM, Tillmaand EG, Kandel ME, Oraham AW, Mevis MB, Rubakhin SS, Popescu G, Sweedler JV, Nuzzo RG. 3D-Printed pHEMA Materials for Topographical and Biochemical Modulation of Dorsal Root Ganglion Cell Response. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30318-30328. [PMID: 28813592 PMCID: PMC5605921 DOI: 10.1021/acsami.7b06742] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Understanding and controlling the interactions occurring between cells and engineered materials are central challenges toward progress in the development of biomedical devices. In this work, we describe materials for direct ink writing (DIW), an extrusion-based type of 3D printing, that embed a custom synthetic protein (RGD-PDL) within the microfilaments of 3D-hydrogel scaffolds to modify these interactions and differentially direct tissue-level organization of complex cell populations in vitro. The RGD-PDL is synthesized by modifying poly-d-lysine (PDL) to varying extents with peptides containing the integrin-binding motif Arg-Gly-Asp (RGD). Compositional gradients of the RGD-PDL presented by both patterned and thin-film poly(2-hydroxyethyl) methacrylate (pHEMA) substrates allow the patterning of cell-growth compliance in a grayscale form. The surface chemistry-dependent guidance of cell growth on the RGD-PDL-modified pHEMA materials is demonstrated using a model NIH-3T3 fibroblast cell line. The formation of a more complex cellular system-organotypic primary murine dorsal root ganglion (DRG)-in culture is also achieved on these scaffolds, where distinctive forms of cell growth and migration guidance are seen depending on their RGD-PDL content and topography. This experimental platform for the study of physicochemical factors on the formation and the reorganization of organotypic cultures offers useful capabilities for studies in tissue engineering, regenerative medicine, and diagnostics.
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Affiliation(s)
- Adina Badea
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Joselle M. McCracken
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Emily G. Tillmaand
- Neuroscience Program, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Mikhail E. Kandel
- Department of Electrical and Computer Engineering, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Aaron W. Oraham
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Molly B. Mevis
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Stanislav S. Rubakhin
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Gabriel Popescu
- Department of Electrical and Computer Engineering, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Jonathan V. Sweedler
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
- Neuroscience Program, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
| | - Ralph G. Nuzzo
- School of Chemical Sciences, University of Illinois-Urbana Champaign, Urbana, IL 61801, United States of America
- School of Chemical Science and Engineering, KTH Royal Institute of Technology, Stockholm, Sweden
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7
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Mashinchian O, Turner LA, Dalby MJ, Laurent S, Shokrgozar MA, Bonakdar S, Imani M, Mahmoudi M. Regulation of stem cell fate by nanomaterial substrates. Nanomedicine (Lond) 2015; 10:829-47. [DOI: 10.2217/nnm.14.225] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Stem cells are increasingly studied because of their potential to underpin a range of novel therapies, including regenerative strategies, cell type-specific therapy and tissue repair, among others. Bionanomaterials can mimic the stem cell environment and modulate stem cell differentiation and proliferation. New advances in these fields are presented in this review. This work highlights the importance of topography and elasticity of the nano-/micro-environment, or niche, for the initiation and induction of stem cell differentiation and proliferation.
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Affiliation(s)
- Omid Mashinchian
- Department of Medical Nanotechnology, School of Advanced Technologies in Medicine (SATiM), Tehran University of Medical Sciences, PO Box 14177–55469, Tehran, Iran
| | - Lesley-Anne Turner
- Centre for Cell Engineering, Joseph Black Building, Institute of Biomedical & Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Matthew J Dalby
- Centre for Cell Engineering, Joseph Black Building, Institute of Biomedical & Life Sciences, University of Glasgow, Glasgow G12 8QQ, Scotland, UK
| | - Sophie Laurent
- Department of General, Organic & Biomedical Chemistry, NMR & Molecular Imaging Laboratory, University of Mons, Avenue Maistriau 19, B-7000 Mons, Belgium
- CMMI – Center for Microscopy & Molecular Imaging, Rue Adrienne Bolland, 8, B-6041 Gosselies, Belgium
| | | | - Shahin Bonakdar
- National Cell Bank, Pasteur Institute of Iran, PO Box 13169–43551, Tehran, Iran
| | - Mohammad Imani
- Novel Drug Delivery Systems Department, Iran Polymer & Petrochemical Institute (IPPI), PO Box 14965/115, Tehran, Iran
| | - Morteza Mahmoudi
- Department of Nanotechnology & Nanotechnology Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, PO Box 14155–6451, Tehran, Iran
- Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA 94305–5101, USA
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305–5101, USA
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8
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Stoll H, Kwon IK, Lim JY. Material and mechanical factors: new strategy in cellular neurogenesis. Neural Regen Res 2014; 9:1810-3. [PMID: 25422642 PMCID: PMC4239770 DOI: 10.4103/1673-5374.143426] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2014] [Indexed: 11/04/2022] Open
Abstract
Since damaged neural circuits are not generally self-recovered, developing methods to stimulate neurogenesis is critically required. Most studies have examined the effects of soluble pharmacological factors on the cellular neurogenesis. On the other hand, it is now recognized that the other extracellular factors, including material and mechanical cues, also have a strong potential to induce cellular neurogenesis. This article will review recent data on the material (chemical patterning, micro/nano-topography, carbon nanotube, graphene) and mechanical (static cue from substrate stiffness, dynamic cue from stretch and flow shear) stimulations of cellular neurogenesis. These approaches may provide new neural regenerative medicine protocols. Scaffolding material templates capable of triggering cellular neurogenesis can be explored in the presence of neurogenesis-stimulatory mechanical environments, and also with conventional soluble factors, to enhance axonal growth and neural network formation in neural tissue engineering.
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Affiliation(s)
- Hillary Stoll
- Department of Biological Systems Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Il Keun Kwon
- The Graduate School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Jung Yul Lim
- The Graduate School of Dentistry, Kyung Hee University, Seoul, Korea ; Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
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Petrelli A, Marconi E, Salerno M, De Pietri Tonelli D, Berdondini L, Dante S. Nano-volume drop patterning for rapid on-chip neuronal connect-ability assays. LAB ON A CHIP 2013; 13:4419-4429. [PMID: 24064674 DOI: 10.1039/c3lc50564b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The ability of neurons to extend projections and to form physical connections among them (i.e., "connect-ability") is altered in several neuropathologies. The quantification of these alterations is an important read-out to investigate pathogenic mechanisms and for research and development of neuropharmacological therapies, however current morphological analysis methods are very time-intensive. Here, we present and characterize a novel on-chip approach that we propose as a rapid assay. Our approach is based on the definition on a neuronal cell culture substrate of discrete patterns of adhesion protein spots (poly-d-lysine, 23 ± 5 μm in diameter) characterized by controlled inter-spot separations of increasing distance (from 40 μm to 100 μm), locally adsorbed in an adhesion-repulsive agarose layer. Under these conditions, the connect-ability of wild type primary neurons from rodents is shown to be strictly dependent on the inter-spot distance, and can be rapidly documented by simple optical read-outs. Moreover, we applied our approach to identify connect-ability defects in neurons from a mouse model of 22q11.2 deletion syndrome/DiGeorge syndrome, by comparative trials with wild type preparations. The presented results demonstrate the sensitivity and reliability of this novel on-chip-based connect-ability approach and validate the use of this method for the rapid assessment of neuronal connect-ability defects in neuropathologies.
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Affiliation(s)
- Alessia Petrelli
- Nanophysics, Istituto Italiano di Tecnologia, Via Morego 30, I-16163 Genova, Italy.
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Tang-Schomer MD, Davies P, Graziano D, Thurber AE, Kaplan DL. Neural circuits with long-distance axon tracts for determining functional connectivity. J Neurosci Methods 2013; 222:82-90. [PMID: 24216177 DOI: 10.1016/j.jneumeth.2013.10.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Accepted: 10/25/2013] [Indexed: 10/26/2022]
Abstract
The cortical circuitry in the brain consists of structurally and functionally distinct neuronal assemblies with reciprocal axon connections. To generate cell culture-based systems that emulate axon tract systems of an in vivo neural network, we developed a living neural circuit consisting of compartmentalized neuronal populations connected by arrays of two millimeter-long axon tracts that are integrated on a planar multi-electrode array (MEA). The millimeter-scale node-to-node separation allows for pharmacological and electrophysiological manipulations to simultaneously target multiple neuronal populations. The results show controlled selectivity of dye absorption by neurons in different compartments. MEA-transmitted electrical stimulation of targeted neurons shows ∼46% increase of intracellular calcium levels with 20 Hz stimulation, but ∼22% decrease with 2k Hz stimulation. The unique feature of long distance axons promotes in vivo-like fasciculation. These axon tracts are determined to be inhibitory afferents by showing increased action potential firing of downstream node upon selective application of γ-aminobutyric acid (GABA) to the upstream node. Together, this model demonstrates integrated capabilities for assessing multiple endpoints including axon tract tracing, calcium influx, network architecture and activities. This system can be used as a multi-functional platform for studying axon tract-associated CNS disorders in vitro, such as diffuse axonal injury after brain trauma.
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Affiliation(s)
- Min D Tang-Schomer
- Tufts University, Department of Biomedical Engineering, Medford, MA 02155, United States
| | - Paul Davies
- Tufts University School of Medicine, Department of Neuroscience, Boston, MA 02111, United States
| | - Daniel Graziano
- Tufts University, Department of Biomedical Engineering, Medford, MA 02155, United States
| | - Amy E Thurber
- Tufts University, Sackler School of Graduate Biomedical Sciences, Program in Cell, Molecular, and Developmental Biology, Boston, MA 02111, United States
| | - David L Kaplan
- Tufts University, Department of Biomedical Engineering, Medford, MA 02155, United States.
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Jalili K, Abbasi F, Milchev A. Surface Microdynamics Phase Transition and Internal Structure of High-Density, Ultrathin PHEMA-b-PNIPAM Diblock Copolymer Brushes on Silicone Rubber. Macromolecules 2013. [DOI: 10.1021/ma4003962] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Jalili
- Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - F. Abbasi
- Institute of Polymeric Materials, Sahand University of Technology, Tabriz, Iran
| | - A. Milchev
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Institute for Physical Chemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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12
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Tang-Schomer MD, Davies P, Graziano D, Thurber AE, Kaplan DL. WITHDRAWN: Neural circuits with long-distance axon tracts for determining functional connectivity. J Neurosci Methods 2013:S0165-0270(13)00106-4. [PMID: 23541736 DOI: 10.1016/j.jneumeth.2013.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Accepted: 03/02/2013] [Indexed: 11/18/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Min D Tang-Schomer
- Tufts University, Department of Biomedical Engineering, Medford, MA 02155, United States
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13
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Jain S, Sharma A, Basu B. In vitrocytocompatibility assessment of amorphous carbon structures using neuroblastoma and Schwann cells. J Biomed Mater Res B Appl Biomater 2013; 101:520-31. [DOI: 10.1002/jbm.b.32852] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/20/2012] [Accepted: 10/05/2012] [Indexed: 12/12/2022]
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14
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Xu X, Wittenberg NJ, Jordan LR, Kumar S, Watzlawik JO, Warrington AE, Oh SH, Rodriguez M. A patterned recombinant human IgM guides neurite outgrowth of CNS neurons. Sci Rep 2013; 3:2267. [PMID: 23881231 PMCID: PMC3721078 DOI: 10.1038/srep02267] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Accepted: 06/26/2013] [Indexed: 11/13/2022] Open
Abstract
Matrix molecules convey biochemical and physical guiding signals to neurons in the central nervous system (CNS) and shape the trajectory of neuronal fibers that constitute neural networks. We have developed recombinant human IgMs that bind to epitopes on neural cells, with the aim of treating neurological diseases. Here we test the hypothesis that recombinant human IgMs (rHIgM) can guide neurite outgrowth of CNS neurons. Microcontact printing was employed to pattern rHIgM12 and rHIgM22, antibodies that were bioengineered to have variable regions capable of binding to neurons or oligodendrocytes, respectively. rHIgM12 promoted neuronal attachment and guided outgrowth of neurites from hippocampal neurons. Processes from spinal neurons followed grid patterns of rHIgM12 and formed a physical network. Comparison between rHIgM12 and rHIgM22 suggested the biochemistry that facilitates anchoring the neuronal surfaces is a prerequisite for the function of IgM, and spatial properties cooperate in guiding the assembly of neuronal networks.
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Affiliation(s)
- Xiaohua Xu
- Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
- These authors contributed equally to this work
| | - Nathan J. Wittenberg
- Laboratory of Nanostructures and Biosensing, Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
- These authors contributed equally to this work
| | - Luke R. Jordan
- Laboratory of Nanostructures and Biosensing, Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Shailabh Kumar
- Laboratory of Nanostructures and Biosensing, Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Jens O. Watzlawik
- Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
- Department of Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Arthur E. Warrington
- Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
| | - Sang-Hyun Oh
- Laboratory of Nanostructures and Biosensing, Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455 USA
- Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455 USA
| | - Moses Rodriguez
- Department of Neurology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
- Department of Immunology, Mayo Clinic College of Medicine, Rochester, MN 55905 USA
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Kang K, Lee S, Kim R, Choi IS, Nam Y. Electrochemically Driven, Electrode-Addressable Formation of Functionalized Polydopamine Films for Neural Interfaces. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201207129] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Kang K, Lee S, Kim R, Choi IS, Nam Y. Electrochemically Driven, Electrode-Addressable Formation of Functionalized Polydopamine Films for Neural Interfaces. Angew Chem Int Ed Engl 2012; 51:13101-4. [DOI: 10.1002/anie.201207129] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Indexed: 12/31/2022]
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17
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Jeon K, Oh HJ, Lim H, Kim JH, Lee DH, Lee ER, Park BH, Cho SG. Self-renewal of embryonic stem cells through culture on nanopattern polydimethylsiloxane substrate. Biomaterials 2012; 33:5206-20. [DOI: 10.1016/j.biomaterials.2012.04.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Accepted: 04/01/2012] [Indexed: 10/28/2022]
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18
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Kanagasabapathi TT, Ciliberti D, Martinoia S, Wadman WJ, Decré MMJ. Dual-compartment neurofluidic system for electrophysiological measurements in physically segregated and functionally connected neuronal cell culture. FRONTIERS IN NEUROENGINEERING 2011; 4:13. [PMID: 22025913 PMCID: PMC3198030 DOI: 10.3389/fneng.2011.00013] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2011] [Accepted: 10/03/2011] [Indexed: 11/19/2022]
Abstract
We developed a dual-compartment neurofluidic system with inter-connecting microchannels to connect neurons from their respective compartments, placed on a planar microelectrode arrays. The design and development of the compartmented microfluidic device for neuronal cell culture, protocol for sustaining long-term cultures, and neurite growth through microchannels in such a closed compartment device are presented. Using electrophysiological measurements of spontaneous network activity in the compartments and selective pharmacological manipulation of cells in one compartment, the biological origin of network activity and the fluidic isolation between the compartments are demonstrated. The connectivity between neuronal populations via the microchannels and the crossing-over of neurites are verified using transfection experiments and immunofluorescence staining. In addition to the neurite cross-over to the adjacent compartment, functional connectivity between cells in both the compartments is verified using cross-correlation (CC) based techniques. Bidirectional signal propagation between the compartments is demonstrated using functional connectivity maps. CC analysis and connectivity maps demonstrate that the two neuronal populations are not only functionally connected within each compartment but also with each other and a well connected functional network was formed between the compartments despite the physical barrier introduced by the microchannels.
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19
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A biofunctionalization scheme for neural interfaces using polydopamine polymer. Biomaterials 2011; 32:6374-80. [DOI: 10.1016/j.biomaterials.2011.05.028] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2011] [Accepted: 05/10/2011] [Indexed: 11/20/2022]
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20
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Generation of Patterned Neuronal Networks on Cell-Repellant Poly(oligo(ethylene glycol) Methacrylate) Films. Chem Asian J 2010; 5:1804-9. [DOI: 10.1002/asia.200900761] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Charrier A, Martinez D, Monette R, Comas T, Movileanu R, Py C, Denhoff M, Krantis A, Mealing G. Cell placement and guidance on substrates for neurochip interfaces. Biotechnol Bioeng 2010; 105:368-73. [DOI: 10.1002/bit.22539] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Malpique R, Ehrhart F, Katsen-Globa A, Zimmermann H, Alves PM. Cryopreservation of adherent cells: strategies to improve cell viability and function after thawing. Tissue Eng Part C Methods 2009; 15:373-86. [PMID: 19196129 DOI: 10.1089/ten.tec.2008.0410] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The commonly applied cryopreservation protocols routinely used in laboratories worldwide were developed for simple cell suspensions, and their application to complex systems, such as cell monolayers, tissues, or biosynthetic constructs, is not straightforward. In particular for monolayer cultures, cell detachment and membrane damage are often observed after cryopreservation. In this work, combined strategies for the cryopreservation of cells attached to Matrigel-coated well plate's surfaces were investigated based on cell entrapment in clinicalgrade, ultra-high viscosity alginate using two cell lines, neuroblastoma N2a and colon adenocarcinoma Caco-2, with distinct structural and functional characteristics. As the cryopreservation medium, serum-free CryoStor solution was compared with serum-supplemented culture medium, both containing 10% DMSO. Using culture medium, entrapment beneath an alginate layer was needed to improve cell recovery by minimizing membrane damage and cell detachment after thawing; nevertheless, up to 50% cell death still occurred within 24 h after thawing. The use of CryoStor solution represented a considerable improvement of the cryopreservation process for both cell lines, allowing the maintenance of high postthaw membrane integrity as well as full recovery of metabolic activity and differentiation capacity within 24 h postthawing; in this case, entrapment beneath an alginate layer did not confer further protection to cryopreserved Caco-2 cells, but was crucial for maintenance of attachment and integrity of N2a neuronal networks.
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Affiliation(s)
- Rita Malpique
- Animal Cell Technology, IBET/ITQB-UNL, 27801-901 Oeiras, Portugal
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23
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Tremblay RG, Sikorska M, Sandhu JK, Lanthier P, Ribecco-Lutkiewicz M, Bani-Yaghoub M. Differentiation of mouse Neuro 2A cells into dopamine neurons. J Neurosci Methods 2009; 186:60-7. [PMID: 19903493 DOI: 10.1016/j.jneumeth.2009.11.004] [Citation(s) in RCA: 191] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2009] [Revised: 10/06/2009] [Accepted: 11/04/2009] [Indexed: 01/19/2023]
Abstract
Neuro 2A (N2a) is a mouse neural crest-derived cell line that has been extensively used to study neuronal differentiation, axonal growth and signaling pathways. A convenient characteristic of these cells is their ability to differentiate into neurons within a few days. However, most differentiation methods reported for N2a cells do not provide information about the neuronal types obtained after each treatment. In this study, we evaluated the generation of N2a dopamine neurons following treatment with a number of factors known to induce neuronal differentiation. Our results showed that N2a cells express Nurr-related factor 1 (Nurr1) and produce low levels of tyrosine hydroxylase (TH) and dopamine. Both TH and dopamine levels were significantly enhanced in the presence of dibutyryl cyclic adenosine monophosphate (dbcAMP), as evidenced by Western blot, immunocytochemistry and high performance liquid chromatography (HPLC). In contrast to dbcAMP, other factors such as transforming growth factor beta1 (TGF beta 1), bone morphogenetic protein 4 (BMP4), glial cell-derived neurotrophic factor (GDNF) and retinoic acid (RA) did not increase TH expression. Further investigation confirmed that the effect of dbcAMP on production of TH-positive neurons was mediated through cyclic AMP (cAMP) responsive element binding protein (CREB) and it was antagonized by RA. Thus, although various treatments can be used to generate N2a neurons, only dbcAMP significantly enhanced the formation of dopamine neurons. Taken together, this study provided a simple and reliable method to generate dopamine neurons for rapid and efficient physiological and pharmacological assays.
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Affiliation(s)
- Roger G Tremblay
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, Ottawa, ON, K1A 0R6, Canada
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24
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Hanson JN, Motala MJ, Heien ML, Gillette M, Sweedler J, Nuzzo RG. Textural guidance cues for controlling process outgrowth of mammalian neurons. LAB ON A CHIP 2009; 9:122-31. [PMID: 19209344 PMCID: PMC2819304 DOI: 10.1039/b803595d] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We explore textural cues as a mechanism for controlling neuronal process outgrowth in primary cultures of mammalian neurons. The work uses a form of decal transfer lithography to generate arrays of PDMS posts of various dimensions and spacings on glass substrates that are rendered growth-compliant by subsequent treatment with a protein activator. Hippocampal neurons plated on these substrates are used to determine how the posts direct process growth by acting as attachment points or guidance cues. Textural features varying over a large range, even as large as 100 microm in diameter, dramatically affect process growth. Indeed, two growth regimes are observed; at the smaller feature sizes considered, process branching strongly aligns (at right angles) along the post mesh, while neuronal outgrowth on the larger feature sizes elicits process wrapping. The latter behavior most strongly manifests in neurons plated initially at approximately 100 cells/mm(2), where the cells were able to form networks, while for isolated neurons, the cells exhibit poorer viability and development. Bag cell neurons from Aplysia californica also display regular growth patterns, but in this case are guided by contact avoidance of the posts, a behavior qualitatively different than that of the hippocampal neurons.
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Affiliation(s)
- Jennifer N Hanson
- Department of Material Science and Engineering, University of Illinois, Urbana-Champaign, Urbana, IL 61801, USA
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25
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Bani-Yaghoub M, Tremblay RG, Ajji A, Nzau M, Gangaraju S, Chitty D, Zurakowski B, Sikorska M. Neuroregenerative strategies in the brain: emerging significance of bone morphogenetic protein 7 (BMP7). Biochem Cell Biol 2008; 86:361-9. [DOI: 10.1139/o08-116] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Every year thousands of people suffer from brain injuries and stroke, and develop motor, sensory, and cognitive problems as a result of neuronal loss in the brain. Unfortunately, the damaged brain has a limited ability to enact repair and current modes of treatment are not sufficient to offset the damage. An extensive list of growth factors, neurotrophic factors, cytokines, and drugs has been explored as potential therapies. However, only a limited number of them may actually have the potential to effectively offset the brain injury or stroke-related problems. One of the treatments considered for future brain repair is bone morphogenetic protein 7 (BMP7), a factor currently used in patients to treat non-neurological diseases. The clinical application of BMP7 is based on its neuroprotective role in stroke animal models. This paper reviews the current approaches considered for brain repair and discusses the novel convergent strategies by which BMP7 potentially can induce neuroregeneration.
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Affiliation(s)
- Mahmud Bani-Yaghoub
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Roger G. Tremblay
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Abdellah Ajji
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Munyao Nzau
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Sandhya Gangaraju
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - David Chitty
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Bogdan Zurakowski
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
| | - Marianna Sikorska
- Neurogenesis and Brain Repair Group, Neurobiology Program, Institute for Biological Sciences, National Research Council Canada, 1200 Montreal Rd., Bldg. M-54, Ottawa, ON K1A 0R6, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
- Functional Polymer Systems Group, Industrial Materials Institute, National Research Council Canada, Boucherville, QC J4B 6Y4, Canada
- Division of Neurosurgery, Children’s Hospital of Eastern Ontario, Ottawa, ON K1H 8L1, Canada
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26
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Kim SJ, Lee JK, Kim JW, Jung JW, Seo K, Park SB, Roh KH, Lee SR, Hong YH, Kim SJ, Lee YS, Kim SJ, Kang KS. Surface modification of polydimethylsiloxane (PDMS) induced proliferation and neural-like cells differentiation of umbilical cord blood-derived mesenchymal stem cells. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2953-2962. [PMID: 18360798 DOI: 10.1007/s10856-008-3413-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2007] [Accepted: 02/22/2008] [Indexed: 05/26/2023]
Abstract
Stem cell-based therapy has recently emerged for use in novel therapeutics for incurable diseases. For successful recovery from neurologic diseases, the most pivotal factor is differentiation and directed neuronal cell growth. In this study, we fabricated three different widths of a micro-pattern on polydimethylsiloxane (PDMS; 1, 2, and 4 microm). Surface modification of the PDMS was investigated for its capacity to manage proliferation and differentiation of neural-like cells from umbilical cord blood-derived mesenchymal stem cells (UCB-MSCs). Among the micro-patterned PDMS fabrications, the 1 microm-patterned PDMS significantly increased cell proliferation and most of the cells differentiated into neuronal cells. In addition, the 1 microm-patterned PDMS induced an increase in cytosolic calcium, while the differentiated cells on the flat and 4 microm-patterned PDMS had no response. PDMS with a 1 microm pattern was also aligned to direct orientation within 10 degrees angles. Taken together, micro-patterned PDMS supported UCB-MSC proliferation and induced neural like-cell differentiation. Our data suggest that micro-patterned PDMS might be a guiding method for stem cell therapy that would improve its therapeutic action in neurological diseases.
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Affiliation(s)
- Sun-Jung Kim
- Adult Stem Cell Research, College of Veterinary Medicine, Seoul National University, 151-742 Seoul, Republic of Korea
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27
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Kim JY, Park H, Kwon KH, Park JY, Baek JY, Lee TS, Song HR, Park YD, Lee SH. A cell culturing system that integrates the cell loading function on a single platform and evaluation of the pulsatile pumping effect on cells. Biomed Microdevices 2008; 10:11-20. [PMID: 17624619 DOI: 10.1007/s10544-007-9105-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this paper, we present a novel microfluidic system with pulsatile cell storing, cell-delivering and cell culturing functions on a single PDMS platform. For this purpose, we have integrated two reservoirs, a pulsatile pumping system containing two soft check valves, which were fabricated by in situ photopolymerization, six switch valves, and three cell culture chambers all developed through a simple and rapid fabrication process. The sample volume delivered per stroke was 120 nl and the transported volume was linearly related to the pumping frequency. We have investigated the effect of the pulsatile pneumatic micropumping on the cells during transport. For this purpose, we pumped two types of cell suspensions, one containing human breast adenocarcinoma cells (MCF-7) and the other mesenchymal stem cells (hMSCs) derived from bone marrow. The effect of pulsatile pumping on both cell types was examined by short and long-term culture experiments. Our results showed that the characteristics of both cells were maintained; they were not damaged by the pumping system. Evaluations were carried out by morphological inspection, viability assay and immunophenotyping analysis. The delivered MCF-7 cells and hMSCs spread and proliferated onto the gelatin coated cell culture chamber. This total micro cell culture system can be applied to cell-based high throughput screening and for co-culture of different cells with different volume.
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Affiliation(s)
- J Y Kim
- Department of Biomedical Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, South Korea
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28
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Sharma D. Technogenesis Redesigns Phylogenesis: Or, When Liberation Biology Meets Our Posthuman Future. Biotechnol Law Rep 2007. [DOI: 10.1089/blr.2007.9894] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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29
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Development of an artificial neuronal network with post-mitotic rat fetal hippocampal cells by polyethylenimine. Biosens Bioelectron 2007; 23:1221-8. [PMID: 18191562 DOI: 10.1016/j.bios.2007.11.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2007] [Revised: 10/15/2007] [Accepted: 11/06/2007] [Indexed: 11/21/2022]
Abstract
The selection of appropriate surface materials that promote cellular adhesion and growth is an important consideration when designing a simplified neuronal network in vitro. In the past, extracellular matrix proteins such as laminin (LN) or positively charged substances such as poly-l-lysine (PLL) have been used. In this study, we examined the ability of another positively charged polymer, polyethyleneimine (PEI), to promote neuronal adhesion, growth and the formation of a functional neuronal network in vitro. PEI, PLL and LN were used to produce grid-shape patterns on glass coverslips by micro-contact printing. Post-mitotic neurons from the rat fetal hippocampus were cultured on the different polymers and the viability and morphology of these neurons under serum-free culture conditions were observed using fluorescent microscopy and atomic force microscopy (AFM). We show that neurons cultured on the PEI- and PLL-coated surfaces adhered to and extended neurites along the grid-shape patterns, whereas neurons cultured on the LN-coated coverslips clustered into clumps of cells. In addition, we found that the neurons on the PEI and PLL-coated grids survived for more than 2 weeks in serum-free conditions, whereas most neurons cultured on the LN-coated grids died after 1 week. Using AFM, we observed some neurosynapse-like structures near the neuronal soma on PEI-coated coverslips. These findings indicate that PEI is a suitable surface for establishing a functional neuronal network in vitro.
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30
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Zeng HC, Ho YC, Chen ST, Wu HI, Tung HW, Fang WL, Chang YC. Studying the formation of large cell aggregates in patterned neuronal cultures. J Neurosci Methods 2007; 165:72-82. [PMID: 17618692 DOI: 10.1016/j.jneumeth.2007.05.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2007] [Revised: 05/17/2007] [Accepted: 05/23/2007] [Indexed: 11/30/2022]
Abstract
Patterned neuronal cultures could be produced by plating cells dissociated from rat cortices on glass coverslips, the surface of which was printed with poly-L-lysine (PLL)-positive micropatterns. Large cell aggregates, which greatly disrupted the patterned distribution of neurons, were also generated. To investigate how large cell aggregates were formed, dissociated rat cortical neurons were plated on PLL-coated coverslips in a Petri dish, the surface of which was non-adherent to cells. The cell and cell aggregate densities found later on the coverslip surface increased significantly when larger dishes were used. Most of the neurons not attaching to substratum were able to survive for at least 24h without entering apoptosis. During this time they formed floating spherical aggregates in the medium. These aggregates subsequently were able to attach to PLL-coated coverslips and produced large aggregates resembling those found within our patterned neuronal cultures. The results suggest a causative relationship between the generation of large numbers of neurons unattached to substratum and the formation of large cell aggregates on the patterned neuronal cultures. It was further demonstrated here that patterned neuronal cultures free of large cell aggregates could be prepared by a procedure employing both stencil patterning and microcontact printing technologies.
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Affiliation(s)
- Huan-Chang Zeng
- Institute of Molecular Medicine, National Tsing Hua University, Hsinchu 30043, Taiwan, ROC
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31
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Millet LJ, Stewart ME, Sweedler JV, Nuzzo RG, Gillette MU. Microfluidic devices for culturing primary mammalian neurons at low densities. LAB ON A CHIP 2007; 7:987-94. [PMID: 17653340 DOI: 10.1039/b705266a] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Microfluidic devices have been used to study high-density cultures of many cell types. Because cell-to-cell signaling is local, however, there exists a need to develop culture systems that sustain small numbers of neurons and enable analyses of the microenvironments. Such cultures are hard to maintain in stable form, and it is difficult to prevent cell death when using primary mammalian neurons. We demonstrate that postnatal primary hippocampal neurons from rat can be cultured at low densities within nanoliter-volume microdevices fabricated using polydimethylsiloxane (PDMS). Doing so requires an additional fabrication step, serial extractions/washes of PDMS with several solvents, which removes uncrosslinked oligomers, solvent and residues of the platinum catalyst used to cure the polymer. We found this step improves the biocompatibility of the PDMS devices significantly. Whereas neurons survive for > or = 7 days in open channel microdevices, the ability to culture neurons in closed-channel devices made of untreated, native PDMS is limited to < or = 2 days. When the closed-channel PDMS devices are extracted, biocompatibility improves allowing for reliable neuron cultures at low densities for > or = 7 days. Comparisons made to autoclaved PDMS and native, untreated PDMS reveal that the solvent-treated polymer is superior in sustaining low densities of primary neurons in culture. When neuronal affinity for local substrates is observed directly, we find that axons localize to channel corners and prefer PDMS surfaces to glass in hybrid devices. When perfusing the channels with media by gravity flow, cultured hippocampal neurons survive for > or = 11 days. Extracting PDMS improves biocompatibility of microfluidic devices and thus enables the study of differentiation of identifiable neurons and the characterization of local extracellular signals.
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Affiliation(s)
- Larry J Millet
- Department of Cell and Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
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32
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Barrilleaux B, Phinney DG, Prockop DJ, O'Connor KC. Review: ex vivo engineering of living tissues with adult stem cells. ACTA ACUST UNITED AC 2007; 12:3007-19. [PMID: 17518617 DOI: 10.1089/ten.2006.12.3007] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Adult stem cells have the potential to revolutionize regenerative medicine with their unique abilities to self-renew and differentiate into various phenotypes. This review examines progress and challenges in ex vivo tissue engineering with adult stem cells. These rare cells are harvested from a variety of tissues, including bone marrow, adipose, skeletal muscle, and placenta, and differentiate into cells of their own lineage and in some cases atypical lineages. Insight into the stem cell niche leads to the identification of matrix components, soluble factors, and physiological conditions that enhance the ex vivo amplification and differentiation of stem cells. Scaffolds composed of metals, naturally occurring materials, and synthetic polymers organize stem cells into complex spatial groupings that mimic native tissue. Cell signals from covalently bound ligands and slowly released regulatory factors in scaffolds direct stem cell fate. Future advances in stem cell biology and scaffold design will ultimately improve the efficacy of tissue substitutes as implants, in research, and as extracorporeal devices.
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Affiliation(s)
- Bonnie Barrilleaux
- Department of Chemical and Biomolecular Engineering, Tulane University, New Orleans, Louisiana 70118, USA
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33
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Zhang H, Hayashi T, Tsuru K, Deguchi K, Nagahara M, Hayakawa S, Nagai M, Kamiya T, Osaka A, Abe K. Vascular endothelial growth factor promotes brain tissue regeneration with a novel biomaterial polydimethylsiloxane-tetraethoxysilane. Brain Res 2006; 1132:29-35. [PMID: 17189618 DOI: 10.1016/j.brainres.2006.09.117] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2006] [Revised: 09/21/2006] [Accepted: 09/25/2006] [Indexed: 12/22/2022]
Abstract
In the brain after infarction or trauma, the tissue eventually becomes pannecrotic and forms a cavity. In such situations, a scaffold is necessary for the implanted or migrated cells to produce new tissue. In this present study, therefore, we attempted to restore brain tissue using a novel biomaterial, polydimethylsiloxane-tetraethoxysilane (PDMS-TEOS) hybrid with or without vascular endothelial growth factor (VEGF), which is crucial for new vessel formation. When PDMS-TEOS scaffold was implanted into the artificial brain defect, it remained at the implanted site and kept the integrity of the brain shape. At 30 days after the implantation, the marginal territory of PDMS-TEOS scaffold became occupied by newly formed tissue. Immunohistochemical analysis revealed that the new tissue was constituted by astrocytes and endothelial cells. Addition of VEGF increased the newly produced tissue volume, and the immunohistochemical analysis showed that the numbers of astrocytes and endothelial cells were increased. Double staining with proliferation maker Ki67 demonstrated that VEGF significantly increased newly formed astrocytes and endothelial cells, indicating that addition of VEGF accelerated tissue restoration and angiogenesis. These findings show that implantation of PDMS-TEOS scaffold with VEGF might be effective for treating old brain infarction or trauma.
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Affiliation(s)
- HanZhe Zhang
- Department of Neurology, Graduate School of Medicine, Dentistry and Pharmacy, Okayama University, 2-5-1 Shikata-cho, Okayama, 700-8558, Japan
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