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Afsharian MH, Mahdavian R, Jafari S, Allahverdi A, Soleymani H, Naderi-Manesh H. Investigation of synergic effects of nanogroove topography and polyaniline-chitosan nanocomposites on PC12 cell differentiation and axonogenesis. iScience 2024; 27:108828. [PMID: 38303727 PMCID: PMC10831943 DOI: 10.1016/j.isci.2024.108828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/09/2023] [Accepted: 01/03/2024] [Indexed: 02/03/2024] Open
Abstract
Axonal damage is the main characteristic of neurodegenerative diseases. This research was focused on remodeling cell morphology and developing a semi-tissue nanoenvironment via mechanobiological stimuli. The combination of nanogroove topography and polyaniline-chitosan enabled the manipulation of the cells by changing the morphology of PC12 cells to spindle shape and inducing the early stage of signal transduction, which is vital for differentiation. The nanosubstarte embedded with nanogooves induced PC12 cells to elongate their morphology and increase their size by 51% as compared with controls. In addition, the use of an electroconductive nanocomposite alongside nanogrooves resulted in the differentiation of PC12 cells into neurons with an average length of 193 ± 7 μm for each axon and an average number of seven axons for each neurite. Our results represent a combined tool to initiate a promising future for cell reprogramming by inducing cell differentiation and specific cellular morphology in many cases, including neurodegenerative diseases.
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Affiliation(s)
- Mohammad Hossein Afsharian
- Department of Biophysics, Faculty of Biological Sciences Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box: 14115-111, Tehran, Iran
| | - Reza Mahdavian
- Department of Biophysics, Faculty of Biological Sciences Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box: 14115-111, Tehran, Iran
| | - Samira Jafari
- Pharmaceutical Sciences Research Center, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Abdollah Allahverdi
- Department of Biophysics, Faculty of Biological Sciences Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box: 14115-111, Tehran, Iran
| | - Hossein Soleymani
- Department of Biophysics, Faculty of Biological Sciences Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box: 14115-111, Tehran, Iran
| | - Hossein Naderi-Manesh
- Department of Biophysics, Faculty of Biological Sciences Tarbiat Modares University, Jalal Ale Ahmad Highway, P.O. Box: 14115-111, Tehran, Iran
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Liu C, Wang Z, Yao X, Wang M, Huang Z, Li X. Sustained Biochemical Signaling and Contact Guidance by Electrospun Bicomponents as Promising Scaffolds for Nerve Tissue Regeneration. ACS OMEGA 2021; 6:33010-33017. [PMID: 34901652 PMCID: PMC8655927 DOI: 10.1021/acsomega.1c05117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/15/2021] [Indexed: 06/14/2023]
Abstract
Electrospun fibers are excellent delivery vehicles enabling a sustained release of growth factors to elicit favorable cell responses and are increasingly used in tissue engineering. Scaffolds with specific physical/topographical features can also guide cell migration and maturation. Therefore, growth factor-loaded electrospun scaffolds with a designed topography are promising for tissue regeneration. In this investigation, aligned-fiber scaffolds composed of poly(lactic-co-glycolic acid) nanofibers incorporating a glial cell line-derived growth factor and poly (d,l-lactic acid) nanofibers incorporating a nerve growth factor were produced by electrospinning. The scaffolds provided an aligned fibrous topography and a dual release of growth factors. The rat pheochromocytoma cell (PC12 cell) response to produced non-woven and aligned-fiber scaffolds with/without growth factors was studied. The dual release of growth factors and topographical cues provided by aligned-fiber bicomponent scaffolds induced significant neurite extension, neuronal differentiation, and neurite alignment in a synergistic manner. The scaffolds with predesigned biochemical/topographical cues demonstrated in this study might be promising for nerve tissue repair.
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Affiliation(s)
- Chaoyu Liu
- Department
of Research and Development, Shenzhen Shiningbiotek
Company Limited, Shenzhen 518055, China
| | - Zhiping Wang
- Department
of Research and Development, Shenzhen Anlv
Medical Technology Company Limited, Shenzhen 518055, China
| | - Xumei Yao
- Department
of Research and Development, Shenzhen Shiningbiotek
Company Limited, Shenzhen 518055, China
| | - Min Wang
- Department
of Mechanical Engineering, The University
of Hong Kong, Pokfulam
Road, Hong Kong 999077, China
| | - Zhigang Huang
- Department
of General Practice, Peking University Shenzhen
Hospital, Shenzhen 518036, China
| | - Xiaohua Li
- Department
of Research and Development, Shenzhen Shiningbiotek
Company Limited, Shenzhen 518055, China
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Systems of conductive skin for power transfer in clinical applications. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2021; 51:171-184. [PMID: 34477935 PMCID: PMC8964546 DOI: 10.1007/s00249-021-01568-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/29/2021] [Accepted: 08/12/2021] [Indexed: 11/03/2022]
Abstract
The primary aim of this article is to review the clinical challenges related to the supply of power in implanted left ventricular assist devices (LVADs) by means of transcutaneous drivelines. In effect of that, we present the preventive measures and post-operative protocols that are regularly employed to address the leading problem of driveline infections. Due to the lack of reliable wireless solutions for power transfer in LVADs, the development of new driveline configurations remains at the forefront of different strategies that aim to power LVADs in a less destructive manner. To this end, skin damage and breach formation around transcutaneous LVAD drivelines represent key challenges before improving the current standard of care. For this reason, we assess recent strategies on the surface functionalization of LVAD drivelines, which aim to limit the incidence of driveline infection by directing the responses of the skin tissue. Moreover, we propose a class of power transfer systems that could leverage the ability of skin tissue to effectively heal short diameter wounds. In this direction, we employed a novel method to generate thin conductive wires of controllable surface topography with the potential to minimize skin disruption and eliminate the problem of driveline infections. Our initial results suggest the viability of the small diameter wires for the investigation of new power transfer systems for LVADs. Overall, this review uniquely compiles a diverse number of topics with the aim to instigate new research ventures on the design of power transfer systems for IMDs, and specifically LVADs.
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Interaction of micropatterned topographical and biochemical cues to direct neurite growth from spiral ganglion neurons. Hear Res 2021; 409:108315. [PMID: 34343850 DOI: 10.1016/j.heares.2021.108315] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 05/07/2021] [Accepted: 07/12/2021] [Indexed: 01/01/2023]
Abstract
Functional outcomes with neural prosthetic devices, such as cochlear implants, are limited in part due to physical separation between the stimulating elements and the neurons they stimulate. One strategy to close this gap aims to precisely guide neurite regeneration to position the neurites in closer proximity to electrode arrays. Here, we explore the ability of micropatterned biochemical and topographic guidance cues, singly and in combination, to direct the growth of spiral ganglion neuron (SGN) neurites, the neurons targeted by cochlear implants. Photopolymerization of methacrylate monomers was used to form unidirectional topographical features of ridges and grooves in addition to multidirectional patterns with 90o angle turns. Microcontact printing was also used to create similar uni- and multi-directional patterns of peptides on polymer surfaces. Biochemical cues included peptides that facilitate (laminin, LN) or repel (EphA4-Fc) neurite growth. On flat surfaces, SGN neurites preferentially grew on LN-coated stripes and avoided EphA4-Fc-coated stripes. LN or EphA4-Fc was selectively adsorbed onto the ridges or grooves to test the neurite response to a combination of topographical and biochemical cues. Coating the ridges with EphA4-Fc and grooves with LN lead to enhanced SGN alignment to topographical patterns. Conversely, EphA4-Fc coating on the grooves or LN coating on the ridges tended to disrupt alignment to topographical patterns. SGN neurites respond to combinations of topographical and biochemical cues and surface patterning that leverages both cues enhance guided neurite growth.
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Yao X, Qian Y, Fan C. Electroactive nanomaterials in the peripheral nerve regeneration. J Mater Chem B 2021; 9:6958-6972. [PMID: 34195746 DOI: 10.1039/d1tb00686j] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Severe peripheral nerve injuries are threatening the life quality of human beings. Current clinical treatments contain some limitations and therefore extensive research and efforts are geared towards tissue engineering approaches and development. The biophysical and biochemical characteristics of nanomaterials are highly focused on as critical elements in the design and fabrication of regenerative scaffolds. Recent studies indicate that the electrical properties and nanostructure of biomaterials can significantly affect the progress of nerve repair. More importantly, these studies also demonstrate the fact that electroactive nanomaterials have substantial implications for regulating the viability and fate of primary supporting cells in nerve regeneration. In this review, we summarize the current knowledge of electroconductive and piezoelectric nanomaterials. We exemplify typical cellular responses through cell-material interfaces, and the nanomaterial-induced microenvironment rebalance in terms of several key factors, immune responses, angiogenesis and oxidative stress. This work highlights the mechanism and application of electroactive nanomaterials to the development of regenerative scaffolds for peripheral nerve tissue engineering.
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Affiliation(s)
- Xiangyun Yao
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
| | - Yun Qian
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
| | - Cunyi Fan
- Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, China.
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Su X, Huang Y, Chen R, Zhang Y, He M, Lü X. Metabolomics analysis of poly(l-lactic acid) nanofibers' performance on PC12 cell differentiation. Regen Biomater 2021; 8:rbab031. [PMID: 34168894 PMCID: PMC8218933 DOI: 10.1093/rb/rbab031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/30/2021] [Accepted: 05/21/2021] [Indexed: 11/14/2022] Open
Abstract
The aim of this article is to reveal the influence of aligned/random poly(l-lactic acid) (PLLA) nanofibers on PC12 cell differentiation from the perspective of metabolic level. First, three materials-PLLA aligned nanofibers (PLLA AF), PLLA random nanofibers (PLLA RF) and PLLA films (control)-were prepared by electrospinning and spin coating. Their surface morphologies were characterized. Subsequently, the cell viability, cell morphology and neurite length of PC12 cells on the surface of the three materials were evaluated, indicating more neurites in the PLLA RF groups but the longer average neurite length in the PLLA AF groups. Next, the metabolite profiles of PC12 cells cultured on the surface of the three nanofibers after 12 h, 24 h and 36 h showed that, compared with the control, 51, 48 and 31 types of differential metabolites were detected at the three time points among the AF groups, respectively; and 56, 45 and 41 types among the RF groups, respectively. Furthermore, the bioinformatics analysis of differential metabolites identified two pathways and three metabolites critical to PC12 cell differentiation influenced by the nanofibers. In addition, the verification experiment on critical metabolites and metabolic pathways were performed. The integrative analysis combining cytology, metabolomics and bioinformatics approaches revealed that though both PLLA AF and RF were capable of stimulating the synthesis of neurotransmitters, the PLLA AF were more beneficial for PC12 cell differentiation, whereas the PLLA RF were less effective.
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Affiliation(s)
- Xiaoman Su
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2# Si Pailou, Nanjing 210096, China
| | - Yan Huang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2# Si Pailou, Nanjing 210096, China
| | - Rong Chen
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2# Si Pailou, Nanjing 210096, China
| | - Yiwen Zhang
- Department of Research, SQ Medical Device Co., Ltd, 17# Xinghuo Road, Nanjing 211500, China
| | - Meichen He
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2# Si Pailou, Nanjing 210096, China
| | - Xiaoying Lü
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, 2# Si Pailou, Nanjing 210096, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu Province 226019, China
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Liu C, Li X, Zhao Q, Xie Y, Yao X, Wang M, Cao F. Nanofibrous bicomponent scaffolds for the dual delivery of NGF and GDNF: controlled release of growth factors and their biological effects. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2021; 32:9. [PMID: 33471206 PMCID: PMC7817556 DOI: 10.1007/s10856-020-06479-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 12/18/2020] [Indexed: 06/01/2023]
Abstract
Electrospun fibrous scaffolds capable of providing dual growth factor delivery in a controlled manner have distinctive advantages for tissue engineering. In this study, we have investigated the formation, structure, and characteristics/properties of fibrous bicomponent scaffolds for the dual delivery of glial cell line-derived neurotrophic factor (GDNF) and nerve growth factor (NGF) for peripheral nerve tissue regeneration. GDNF and NGF were incorporated into core-shell structured poly(lactic-co-glycolic acid) (PLGA) and poly (D,L-lactic acid) (PDLLA) nanofibers, respectively, through emulsion electrospinning. Using dual-source dual-power electrospinning, bicomponent scaffolds composed of GDNF/PLGA fibers and NGF/PDLLA fibers with different fiber component ratios were produced. The structure, properties, and in vitro release behavior of mono- and bicomponent scaffolds were systematically investigated. Concurrent and sustained release of GDNF and NGF from bicomponent scaffolds was achieved and their release profiles could be tuned. In vitro biological investigations were conducted. Rat pheochromocytoma cells were found to attach, spread, and proliferate on all scaffolds. The release of growth factors from scaffolds could induce much improved neurite outgrowth and neural differentiation. GDNF and NGF released from GDNF/PLGA scaffolds and NGF/PDLLA scaffolds, respectively, could induce dose-dependent neural differentiation separately. GDNF and NGF released from bicomponent scaffolds exerted a synergistic effect on promoting neural differentiation.
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Affiliation(s)
- Chaoyu Liu
- Department of Research and Development, Shenzhen Shiningbiotek Co., Ltd, Shenzhen, 518055, P. R. China.
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China.
| | - Xiaohua Li
- Department of Research and Development, Shenzhen Shiningbiotek Co., Ltd, Shenzhen, 518055, P. R. China
- Oncology Center, Hubei University of Medicine, Shiyan, 442000, P. R. China
| | - Qilong Zhao
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Science, Shenzhen, 518055, P. R. China
| | - Yuancai Xie
- Department of Thoracic, Peking University Shenzhen Hospital, Shenzhen, 518036, P. R. China
| | - Xumei Yao
- Department of Research and Development, Shenzhen Shiningbiotek Co., Ltd, Shenzhen, 518055, P. R. China
| | - Min Wang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, P. R. China
| | - Fengjun Cao
- Oncology Center, Hubei University of Medicine, Shiyan, 442000, P. R. China.
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Mezzena R, Masciullo C, Antonini S, Cremisi F, Scheffner M, Cecchini M, Tonazzini I. Study of adhesion and migration dynamics in ubiquitin E3A ligase (UBE3A)-silenced SYSH5Y neuroblastoma cells by micro-structured surfaces. NANOTECHNOLOGY 2021; 32:025708. [PMID: 33055385 DOI: 10.1088/1361-6528/abbb03] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
During neuronal development, neuronal cells read extracellular stimuli from the micro/nano-environment within which they exist, retrieving essential directionality and wiring information. Here, focal adhesions (FAs-protein clusters anchoring integrins to cytoskeleton) act as sensors, by integrating signals from both the extracellular matrix environment and chemotactic factors, contributing to the final neuronal pathfinding and migration. In the processes that orchestrate neuronal development, the important function of ubiquitin E3A ligase (UBE3A) is emerging. UBE3A has crucial functions in the brain and changes in its expression levels lead to neurodevelopmental disorders: the lack of UBE3A leads to Angelman syndrome (AS, OMIN 105830), while its increase causes autisms (Dup15q-autism). By using nano/micro-structured anisotropic substrates we previously showed that UBE3A-deficient neurons have deficits in contact guidance (Tonazzini et al, Mol Autism 2019). Here, we investigate the adhesion and migration dynamics of UBE3A-silenced SH-SY5Y neuroblastoma cells in vitro by exploiting nano/micro-grooved substrates. We analyze the molecular processes regulating the development of FAs by transfection with EGFP-vector encoding for paxillin, a protein of FA clusters, and by live-cell total-internal-reflection-fluorescence microscopy. We show that UBE3A-silenced SH-SY5Y cells have impaired FA morphological development and pathway activation, which lead to a delayed adhesion and also explain the defective contact guidance in response to directional topographical stimuli. However, UBE3A-silenced SH-SY5Y cells show an overall normal migration behavior, in terms of speed and ability to follow the GRs directional stimulus. Only the collective cell migration upon cell gaps was slightly delayed for UBE3Ash SHs. Overall, the deficits of UBE3Ash SHS-SY5Y cells in FA maturation/sensing and in collective migration may have patho-physiological implications, in AS condition, considering the much more complex stimuli that neurons find in vivo during the neurodevelopment.
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Affiliation(s)
- R Mezzena
- NEST, Istituto Nanoscienze- CNR and Scuola Normale Superiore, Pisa, Italy
| | - C Masciullo
- NEST, Istituto Nanoscienze- CNR and Scuola Normale Superiore, Pisa, Italy
| | - S Antonini
- NEST, Istituto Nanoscienze- CNR and Scuola Normale Superiore, Pisa, Italy
| | - F Cremisi
- Scuola Normale Superiore, Bio@SNS, Pisa, Italy
| | - M Scheffner
- University of Konstanz, Department of Biology, Konstanz, Germany
| | - M Cecchini
- NEST, Istituto Nanoscienze- CNR and Scuola Normale Superiore, Pisa, Italy
| | - I Tonazzini
- NEST, Istituto Nanoscienze- CNR and Scuola Normale Superiore, Pisa, Italy
- Fondazione Umberto Veronesi, Milano, Italy
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Tonazzini I, Masciullo C, Savi E, Sonato A, Romanato F, Cecchini M. Neuronal contact guidance and YAP signaling on ultra-small nanogratings. Sci Rep 2020; 10:3742. [PMID: 32111918 PMCID: PMC7048778 DOI: 10.1038/s41598-020-60745-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 02/03/2020] [Indexed: 01/09/2023] Open
Abstract
Contact interaction of neuronal cells with extracellular nanometric features can be exploited to investigate and modulate cellular responses. By exploiting nanogratings (NGs) with linewidth from 500 nm down to 100 nm, we here study neurite contact guidance along ultra-small directional topographies. The impact of NG lateral dimension on the neuronal morphotype, neurite alignment, focal adhesion (FA) development and YAP activation is investigated in nerve growth factor (NGF)-differentiating PC12 cells and in primary hippocampal neurons, by confocal and live-cell total internal reflection fluorescence (TIRF) microscopy, and at molecular level. We demonstrate that loss of neurite guidance occurs in NGs with periodicity below 400 nm and correlates with a loss of FA lateral constriction and spatial organization. We found that YAP intracellular localization is modulated by the presence of NGs, but it is not sensitive to their periodicity. Nocodazole, a drug that can increase cell contractility, is finally tested for rescuing neurite alignment showing mild ameliorative effects. Our results provide new indications for a rational design of biocompatible scaffolds for enhancing nerve-regeneration processes.
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Affiliation(s)
- Ilaria Tonazzini
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Cecilia Masciullo
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Eleonora Savi
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy
| | - Agnese Sonato
- CNR-IOM, Area Science Park, S.S. 14, km 163.5, Basovizza, TS, Italy
| | - Filippo Romanato
- CNR-IOM, Area Science Park, S.S. 14, km 163.5, Basovizza, TS, Italy
| | - Marco Cecchini
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro 12, Pisa, 56127, Italy.
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Tonazzini I, Van Woerden GM, Masciullo C, Mientjes EJ, Elgersma Y, Cecchini M. The role of ubiquitin ligase E3A in polarized contact guidance and rescue strategies in UBE3A-deficient hippocampal neurons. Mol Autism 2019; 10:41. [PMID: 31798818 PMCID: PMC6884852 DOI: 10.1186/s13229-019-0293-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Accepted: 10/17/2019] [Indexed: 11/10/2022] Open
Abstract
Background Although neuronal extracellular sensing is emerging as crucial for brain wiring and therefore plasticity, little is known about these processes in neurodevelopmental disorders. Ubiquitin protein ligase E3A (UBE3A) plays a key role in neurodevelopment. Lack of UBE3A leads to Angelman syndrome (AS), while its increase is among the most prevalent genetic causes of autism (e.g., Dup15q syndrome). By using microstructured substrates that can induce specific directional stimuli in cells, we previously found deficient topographical contact guidance in AS neurons, which was linked to a dysregulated activation of the focal adhesion pathway. Methods Here, we study axon and dendrite contact guidance and neuronal morphological features of wild-type, AS, and UBE3A-overexpressing neurons (Dup15q autism model) on micrograting substrates, with the aim to clarify the role of UBE3A in neuronal guidance. Results We found that loss of axonal contact guidance is specific for AS neurons while UBE3A overexpression does not affect neuronal directional polarization along microgratings. Deficits at the level of axonal branching, growth cone orientation and actin fiber content, focal adhesion (FA) effectors, and actin fiber-binding proteins were observed in AS neurons. We tested different rescue strategies for restoring correct topographical guidance in AS neurons on microgratings, by either UBE3A protein re-expression or by pharmacological treatments acting on cytoskeleton contractility. Nocodazole, a drug that depolymerizes microtubules and increases cell contractility, rescued AS axonal alignment to the gratings by partially restoring focal adhesion pathway activation. Surprisingly, UBE3A re-expression only resulted in partial rescue of the phenotype. Conclusions We identified a specific in vitro deficit in axonal topographical guidance due selectively to the loss of UBE3A, and we further demonstrate that this defective guidance can be rescued to a certain extent by pharmacological or genetic treatment strategies. Overall, cytoskeleton dynamics emerge as important partners in UBE3A-mediated contact guidance responses. These results support the view that UBE3A-related deficits in early neuronal morphogenesis may lead to defective neuronal connectivity and plasticity.
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Affiliation(s)
- Ilaria Tonazzini
- Istituto Nanoscienze- Consiglio Nazionale delle Ricerche (CNR) & Scuola Normale Superiore, NEST, Piazza San Silvestro 12, 56127 Pisa, Italy
- Department of Neuroscience, ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus MC, Wytemaweg 80, 3000 CA Rotterdam, the Netherlands
| | - Geeske M. Van Woerden
- Department of Neuroscience, ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus MC, Wytemaweg 80, 3000 CA Rotterdam, the Netherlands
| | - Cecilia Masciullo
- Istituto Nanoscienze- Consiglio Nazionale delle Ricerche (CNR) & Scuola Normale Superiore, NEST, Piazza San Silvestro 12, 56127 Pisa, Italy
| | - Edwin J. Mientjes
- Department of Neuroscience, ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus MC, Wytemaweg 80, 3000 CA Rotterdam, the Netherlands
| | - Ype Elgersma
- Department of Neuroscience, ENCORE Expertise Center for Neurodevelopmental Disorders, Erasmus MC, Wytemaweg 80, 3000 CA Rotterdam, the Netherlands
| | - Marco Cecchini
- Istituto Nanoscienze- Consiglio Nazionale delle Ricerche (CNR) & Scuola Normale Superiore, NEST, Piazza San Silvestro 12, 56127 Pisa, Italy
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Radotić V, Bedalov A, Drviš P, Braeken D, Kovačić D. Guided growth with aligned neurites in adult spiral ganglion neurons cultured in vitro on silicon micro-pillar substrates. J Neural Eng 2019; 16:066037. [PMID: 31189144 DOI: 10.1088/1741-2552/ab2968] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE Assessment of the relationship between the topographical organization of silicon micro-pillar surfaces (MPS) on guidance and neural alignment of adult spiral ganglion neurons (SGN) and use of the otosurgical approach as an alternative for the extraction and isolation of SGNs from adult guinea pigs. APPROACH SGNs from adult guinea pigs were isolated using conventional and otosurgical approach for in vitro cell culturing on MPS of various micro-pillar widths (1-5.6 µm) and spacing (0.6-15 µm). Cell cultures were compared morphologically with neuronal cultures on control glass coverslips. MAIN RESULTS We found enhanced SGN in vitro cultures in MPS areas with small and intermediate inter-pillar spacing (from 0.6 µm to 3.2 µm) as well as in MPS areas with wider pillars (from 1.8 µm to 4 µm) compared to MPS flat zones and control glass coverslips. Scanning electron microscopy (SEM) images highlighted how neurites of SGNs follow straight lines by growing on top and between micro-pillars. Only micro-pillars with small and intermediate pillar spacings favor neurite alignment along preferred angles (30°, 90°, and 150°), while pillars with wider spacing produced less aligned neurites. We found propensity of adult SGNs grown on MPSs to attain more bipolar and multipolar morphologies. Additionally, we observed reduced interaction between neuronal and glial cells compared to control glass coverslips. Finally, we found that the otosurgical approach was more beneficial for SGN survival on glass coverslips and MPS flat surfaces than the conventional method. SIGNIFICANCE MPS with specific architecture supports the guided growth of adult SGNs in vitro and controls adult SGN development and behavior.
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Affiliation(s)
- Viktorija Radotić
- Faculty of Science, Department of Physics, Laboratory for Biophysics and Medical Neuroelectronics, University of Split, R.Boškovića 33, HR-21000 Split, Croatia. The Center of Research Excellence for Science and Technology Integrating Mediterranean region (STIM), University of Split, Poljička 35, HR-21000 Split, Croatia
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De Masi A, Tonazzini I, Masciullo C, Mezzena R, Chiellini F, Puppi D, Cecchini M. Chitosan films for regenerative medicine: fabrication methods and mechanical characterization of nanostructured chitosan films. Biophys Rev 2019; 11:807-815. [PMID: 31529358 PMCID: PMC6815298 DOI: 10.1007/s12551-019-00591-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 09/02/2019] [Indexed: 12/17/2022] Open
Abstract
Regenerative medicine is continuously facing new challenges and it is searching for new biocompatible, green/natural polymer materials, possibly biodegradable and non-immunogenic. Moreover, the critical importance of the nano/microstructuring of surfaces is overall accepted for their full biocompatibility and in vitro/in vivo performances. Chitosan is emerging as a promising biopolymer for tissue engineering and its application can be further improved by exploiting its nano/microstructuration. Here, we report the state of the art of chitosan films and scaffolds nano/micro-structuration. We show that it is possible to obtain, by solvent casting, chitosan thin films with good mechanical properties and to structure them at the microscale and even nanoscale level, with resolutions down to 100 nm.
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Affiliation(s)
- Alessia De Masi
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Ilaria Tonazzini
- NEST, Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127, Pisa, Italy.
| | - Cecilia Masciullo
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Roberta Mezzena
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Federica Chiellini
- Department of Chemistry and Industrial Chemistry, University of Pisa, UdR INSTM PISA, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Dario Puppi
- Department of Chemistry and Industrial Chemistry, University of Pisa, UdR INSTM PISA, Via G. Moruzzi 13, 56124, Pisa, Italy
| | - Marco Cecchini
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
- NEST, Istituto Nanoscienze-CNR, Piazza San Silvestro 12, 56127, Pisa, Italy
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13
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Carvalho CR, Silva-Correia J, Oliveira JM, Reis RL. Nanotechnology in peripheral nerve repair and reconstruction. Adv Drug Deliv Rev 2019; 148:308-343. [PMID: 30639255 DOI: 10.1016/j.addr.2019.01.006] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/20/2018] [Accepted: 01/05/2019] [Indexed: 02/07/2023]
Affiliation(s)
- Cristiana R Carvalho
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal
| | - Joana Silva-Correia
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Joaquim M Oliveira
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal
| | - Rui L Reis
- 3B's Research Group, I3Bs - Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, AvePark, Parque de Ciência e Tecnologia, Zona Industrial da Gandra, 4805-017, Barco, Guimarães, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, AvePark, 4805-017 Barco, Guimarães, Portugal.
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14
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Baranes K, Hibsh D, Cohen S, Yamin T, Efroni S, Sharoni A, Shefi O. Comparing Transcriptome Profiles of Neurons Interfacing Adjacent Cells and Nanopatterned Substrates Reveals Fundamental Neuronal Interactions. NANO LETTERS 2019; 19:1451-1459. [PMID: 30704243 DOI: 10.1021/acs.nanolett.8b03879] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Developing neuronal axons are directed by chemical and physical signals toward a myriad of target cells. According to current dogma, the resulting network architecture is critically shaped by electrical interconnections, the synapses; however, key mechanisms translating neuronal interactions into neuronal growth behavior during network formation are still unresolved. To elucidate these mechanisms, we examined neurons interfacing nanopatterned substrates and compared them to natural interneuron interactions. We grew similar neuronal populations under three connectivity conditions, (1) the neurons are isolated, (2) the neurons are interconnected, and (3) the neurons are connected only to artificial substrates, then quantitatively compared both the cell morphologies and the transcriptome-expression profiles. Our analysis shows that whereas axon-guidance signaling pathways in isolated neurons are predominant, in isolated neurons interfacing nanotopography, these pathways are downregulated, similar to the interconnected neurons. Moreover, in nanotopography, interfacing neuron genes related to synaptogenesis and synaptic regulation are highly expressed, that is, again resembling the behavior of interconnected neurons. These molecular findings demonstrate that interactions with nanotopographies, although not leading to electrical coupling, play a comparable functional role in two major routes, neuronal guidance and network formation, with high relevance to the design of regenerative interfaces.
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Affiliation(s)
- Koby Baranes
- Faculty of Engineering , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Dror Hibsh
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Faculty of Life Sciences , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Sharon Cohen
- Faculty of Engineering , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Gonda Multidisciplinary Brain Research Center , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Tony Yamin
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Department of Physics , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Sol Efroni
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Faculty of Life Sciences , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Amos Sharoni
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Department of Physics , Bar-Ilan University , Ramat-Gan 5290002 , Israel
| | - Orit Shefi
- Faculty of Engineering , Bar-Ilan University , Ramat-Gan 5290002 , Israel
- Bar-Ilan Institute of Nanotechnology and Advanced Materials , Bar-Ilan University , Ramat-Gan 5290002 , Israel
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15
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Zhang D, Wu S, Feng J, Duan Y, Xing D, Gao C. Micropatterned biodegradable polyesters clicked with CQAASIKVAV promote cell alignment, directional migration, and neurite outgrowth. Acta Biomater 2018; 74:143-155. [PMID: 29768188 DOI: 10.1016/j.actbio.2018.05.018] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/28/2018] [Accepted: 05/11/2018] [Indexed: 12/31/2022]
Abstract
The interplay of microstructures and biological cues is critical to regulate the behaviors of Schwann cells (SCs) in terms of cellular spatial arrangement and directional migration as well as neurite orientation for bridging the proximal and distal stumps of the injured peripheral nervous system. In this study, stripe micropatterns having ridges/grooves of width 20/20 and 20/40 μm were fabricated on the surface of maleimide-functionalized biodegradable poly(ester carbonate) (P(LLA-MTMC)) films by the polydimethylsiloxane mold-pressing method, respectively. The laminin-derived CQAASIKVAV peptides end-capped with an SH group were then grafted by the thiol-ene click reaction under mild conditions to obtain micropatterned and peptide-grafted films. SCs cultured on these films, especially on the 20/40-μm film, displayed faster and aligned adhesion as well as a larger number of elongated cells with a higher length-to-width (L/W) ratio along the stripe direction than those on the flat-pep film. The migration rate of SCs was significantly enhanced in parallel to the stripe direction with a large net displacement. The micropatterned and peptide-grafted films, especially the 20/40-μm film, could promote SC proliferation and nerve growth factor (NGF) secretion in a manner similar to that of the peptide-grafted planar film. Moreover, the neurites of rat pheochromocytoma 12 (PC12) cells sprouted along the ridges with a longer average length on the micropatterned and peptide-grafted films. The synergistic effect of physical patterns and biological cues was evaluated by considering the results of cell adhesion force; immunofluorescence staining of vinculin; fluorescence staining of F-actin and the nucleus; as well as gene expression of neural cadherin (NCAD), neurocan (NCAN), and myelin protein zero (P0). STATEMENT OF SIGNIFICANCE The interplay of microstructures and biological cues is critical to regulate the behaviors of Schwann cells (SCs) and nerve cells, and thereby the regeneration of peripheral nerve system. In this study, the combined micropatterning and CQAASIKVAV grafting endowed the modified P(LLA-MTMC) films with both contact guidance and bioactive chemical cues to enhance cell proliferation, directional alignment and migration, longer net displacement and larger NGF secretion, and stronger neurite outgrowth of SCs and PC12 cells. Hence, the integration of physical micropatterns and bioactive molecules is an effective way to obtain featured biomaterials for the regeneration of nerves and other types of tissues.
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16
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Li W, Zhang G, Guan T, Zhang X, Khosrozadeh A, Xing M, Kong J. Manipulable Permeability of Nanogel Encapsulation on Cells Exerts Protective Effect against TNF-α-Induced Apoptosis. ACS Biomater Sci Eng 2018; 4:2825-2835. [DOI: 10.1021/acsbiomaterials.8b00654] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Guohui Zhang
- Department of Forensic Medicine, Hebei North University, Zhangjiakou 075000, China
| | | | | | | | | | - Jiming Kong
- Department of Forensic Medicine, Hebei North University, Zhangjiakou 075000, China
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17
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Liu C, Li X, Xu F, Cong H, Li Z, Song Y, Wang M. Spatio-temporal release of NGF and GDNF from multi-layered nanofibrous bicomponent electrospun scaffolds. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2018; 29:102. [PMID: 29955977 PMCID: PMC6022522 DOI: 10.1007/s10856-018-6105-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/14/2018] [Indexed: 06/02/2023]
Abstract
Scaffolds capable of providing dual neurotrophic factor (NTF) delivery with different release kinetics, spatial delivery of NTFs at different loci and topographical guidance are promising for enhanced peripheral nerve regeneration. In this study, we have designed and fabricated multi-layered aligned-fiber scaffolds through combining emulsion electrospinning, sequential electrospinning and high-speed electrospinning (HS-ES) to modulate the release behavior of glial cell line-derived growth factor(GDNF) and nerve growth factor (NGF). GDNF and NGF were incorporated into poly(lactic-co-glycolic acid) (PLGA) fibers and poly(D,L-lactic acid) (PDLLA) fibers, respectively. Aligned fibers were obtained in each layer of multi-layered scaffolds and relatively thick tri-layered and tetra-layered scaffolds with controlled layer thickness were obtained. Their morphology, structure, properties, and the in vitro release of growth factors were examined. Dual and spatio-temporal release of GDNF and NGF with different release kinetics from multi-layered scaffolds was successfully demonstrated. High separation efficiency by PDLLA fibrous barrier layer for spatial neurotrophic factor delivery from both tri-layered scaffolds and tetra-layered scaffolds was achieved.
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Affiliation(s)
- Chaoyu Liu
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China.
- Department of Research and Development, Shenzhen Gene Health Bio Tech Co., Ltd, Shenzhen, 518055, China.
| | - Xiaohua Li
- Department of Research and Development, Shenzhen Gene Health Bio Tech Co., Ltd, Shenzhen, 518055, China
| | - Feiyue Xu
- Department of Research and Development, Shenzhen Gene Health Bio Tech Co., Ltd, Shenzhen, 518055, China
| | - Haibo Cong
- Department of Reconstructive Microsurgery, Weihai Central Hospital, Weihai, 264400, China
| | - Zongxian Li
- Department of Oncology, Weihai Central Hospital, Weihai, 264400, China
| | - Yuan Song
- Department of Research and Development, Shenzhen Gene Health Bio Tech Co., Ltd, Shenzhen, 518055, China
| | - Min Wang
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
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18
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Park S, Kim D, Park S, Kim S, Lee D, Kim W, Kim J. Nanopatterned Scaffolds for Neural Tissue Engineering and Regenerative Medicine. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1078:421-443. [PMID: 30357636 DOI: 10.1007/978-981-13-0950-2_22] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Biologically inspired approaches employing nanoengineering techniques have been influential in the progress of neural tissue repair and regeneration. Neural tissues are exposed to complex nanoscale environments such as nanofibrils. In this chapter, we summarize representative nanotechniques, such as electrospinning, lithography, and 3D bioprinting, and their use in the design and fabrication of nanopatterned scaffolds for neural tissue engineering and regenerative medicine. Nanotopographical cues in combination with other cues (e.g., chemical cues) are crucial to neural tissue repair and regeneration using cells, including various types of stem cells. Production of biologically inspired nanopatterned scaffolds may encourage the next revolution for studies aiming to advance neural tissue engineering and regenerative medicine.
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Affiliation(s)
- Sunho Park
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Daun Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Sungmin Park
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Sujin Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Dohyeon Lee
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Woochan Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea
| | - Jangho Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju, South Korea.
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19
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Yang Y, Sun J, Liu X, Guo Z, He Y, Wei D, Zhong M, Guo L, Fan H, Zhang X. Wet-spinning fabrication of shear-patterned alginate hydrogel microfibers and the guidance of cell alignment. Regen Biomater 2017; 4:299-307. [PMID: 29026644 PMCID: PMC5633694 DOI: 10.1093/rb/rbx017] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 05/12/2017] [Accepted: 05/21/2017] [Indexed: 12/20/2022] Open
Abstract
Native tissue is naturally comprised of highly-ordered cell-matrix assemblies in a multi-hierarchical way, and the nano/submicron alignment of fibrous matrix is found to be significant in supporting cellular functionalization. In this study, a self-designed wet-spinning device appended with a rotary receiving pool was used to continuously produce shear-patterned hydrogel microfibers with aligned submicron topography. The process that the flow-induced shear force reshapes the surface of hydrogel fiber into aligned submicron topography was systematically analysed. Afterwards, the effect of fiber topography on cellular longitudinal spread and elongation was investigated by culturing rat neuron-like PC12 cells and human osteosarcoma MG63 cells with the spun hydrogel microfibers, respectively. The results suggested that the stronger shear flow force would lead to more distinct aligned submicron topography on fiber surface, which could induce cell orientation along with fiber axis and therefore form the cell-matrix dual-alignment. Finally, a multi-hierarchical tissue-like structure constructed by dual-oriented cell-matrix assemblies was fabricated based on this wet-spinning method. This work is believed to be a potentially novel biofabrication scheme for bottom-up constructing of engineered linear tissue, such as nerve bundle, cortical bone, muscle and hepatic cord.
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Affiliation(s)
- You Yang
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Jing Sun
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Xiaolu Liu
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Zhenzhen Guo
- Department of Gastroenterology, Hospital of the University of Electronic Science and Technology of China and Sichuan Provincial People's Hospital, Sichuan, Chengdu 610072, P. R. China
| | - Yunhu He
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Dan Wei
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Meiling Zhong
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Likun Guo
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Hongsong Fan
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials, Sichuan University, Sichuan, Chengdu 610064, P. R. China
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20
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Marcus M, Baranes K, Park M, Choi IS, Kang K, Shefi O. Interactions of Neurons with Physical Environments. Adv Healthc Mater 2017. [PMID: 28640544 DOI: 10.1002/adhm.201700267] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Nerve growth strongly relies on multiple chemical and physical signals throughout development and regeneration. Currently, a cure for injured neuronal tissue is an unmet need. Recent advances in fabrication technologies and materials led to the development of synthetic interfaces for neurons. Such engineered platforms that come in 2D and 3D forms can mimic the native extracellular environment and create a deeper understanding of neuronal growth mechanisms, and ultimately advance the development of potential therapies for neuronal regeneration. This progress report aims to present a comprehensive discussion of this field, focusing on physical feature design and fabrication with additional information about considerations of chemical modifications. We review studies of platforms generated with a range of topographies, from micro-scale features down to topographical elements at the nanoscale that demonstrate effective interactions with neuronal cells. Fabrication methods are discussed as well as their biological outcomes. This report highlights the interplay between neuronal systems and the important roles played by topography on neuronal differentiation, outgrowth, and development. The influence of substrate structures on different neuronal cells and parameters including cell fate, outgrowth, intracellular remodeling, gene expression and activity is discussed. Matching these effects to specific needs may lead to the emergence of clinical solutions for patients suffering from neuronal injuries or brain-machine interface (BMI) applications.
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Affiliation(s)
- Michal Marcus
- Faculty of Engineering and Bar-Ilan Institute for Nanotechnology and Advanced Materials; Bar-Ilan University; Ramat-Gan 5290002 Israel
| | - Koby Baranes
- Faculty of Engineering and Bar-Ilan Institute for Nanotechnology and Advanced Materials; Bar-Ilan University; Ramat-Gan 5290002 Israel
| | - Matthew Park
- Center for Cell-Encapsulation Research; Department of Chemistry; KAIST; Daejeon 34141 Korea
| | - Insung S. Choi
- Center for Cell-Encapsulation Research; Department of Chemistry; KAIST; Daejeon 34141 Korea
| | - Kyungtae Kang
- Department of Applied Chemistry; Kyung Hee University; Yongin Gyeonggi 17104 Korea
| | - Orit Shefi
- Faculty of Engineering and Bar-Ilan Institute for Nanotechnology and Advanced Materials; Bar-Ilan University; Ramat-Gan 5290002 Israel
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21
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Abstract
Electrical and/or electromechanical stimulation has been shown to play a significant role in regenerating various functionalities in soft tissues, such as tendons, muscles, and nerves. In this work, we investigate the piezoelectric polymer polyvinylidene fluoride (PVDF) as a potential substrate for wireless neuronal differentiation. Piezoelectric PVDF enables generation of electrical charges on its surface upon acoustic stimulation, inducing neuritogenesis of PC12 cells. We demonstrate that the effect of pure piezoelectric stimulation on neurite generation in PC12 cells is comparable to the ones induced by neuronal growth factor (NGF). In inhibitor experiments, our results indicate that dynamic stimulation of PVDF by ultrasonic (US) waves activates calcium channels, thus inducing the generation of neurites via a cyclic adenosine monophosphate (cAMP)-dependent pathway. This mechanism is independent from the well-studied NGF induced mitogen-activated protein kinases/extracellular signal-regulated kinases (MAPK/ERK) pathway. The use of US, in combination with piezoelectric polymers, is advantageous since focused power transmission can occur deep into biological tissues, which holds great promise for the development of non-invasive neuroregenerative devices.
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22
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Sergi PN, Cavalcanti-Adam EA. Biomaterials and computation: a strategic alliance to investigate emergent responses of neural cells. Biomater Sci 2017; 5:648-657. [DOI: 10.1039/c6bm00871b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synergistic use of biomaterials and computation allows to identify and unravel neural cell responses.
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Affiliation(s)
- Pier Nicola Sergi
- The Biorobotics Institute
- Sant’ Anna Scuola Universitaria Superiore
- Pontedera
- 56025 Italy
| | - Elisabetta Ada Cavalcanti-Adam
- Max Planck Institute for Medical Research
- Dept Cellular Biophysics and Heidelberg University
- Dept Biophysical Chemistry
- Heidelberg
- Germany
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23
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Bhagwat N, Murray RE, Shah SI, Kiick KL, Martin DC. Biofunctionalization of PEDOT films with laminin-derived peptides. Acta Biomater 2016; 41:235-46. [PMID: 27181880 DOI: 10.1016/j.actbio.2016.05.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2015] [Revised: 04/24/2016] [Accepted: 05/11/2016] [Indexed: 01/06/2023]
Abstract
UNLABELLED Poly(3,4-ethylenedioxythiophenes) (PEDOT) have been extensively explored as materials for biomedical implants such as biosensors, tissue engineering scaffolds and microelectronic devices. Considerable effort has been made to incorporate biologically active molecules into the conducting polymer films in order to improve their long term performance at the soft tissue interface of devices, and the development of functionalized conducting polymers that can be modified with biomolecules would offer important options for device improvement. Here we report surface modification, via straightforward protocols, of carboxylic-acid-functional PEDOT copolymer films with the nonapeptide, CDPGYIGSR, derived from the basement membrane protein laminin. Evaluation of the modified surfaces via XPS and toluidine blue O assay confirmed the presence of the peptide on the surface and electrochemical analysis demonstrated unaltered properties of the peptide-modified films. The efficacy of the peptide, along with the impact of a spacer molecule, for cell adhesion and differentiation was tested in cell culture assays employing the rat pheochromocytoma (PC12) cell line. Peptide-modified films comprising the longest poly(ethylene glycol) (PEG) spacer used in this study, a PEG with ten ethylene glycol repeats, demonstrated the best attachment and neurite outgrowth compared to films with peptides alone or those with a PEG spacer comprising three ethylene glycol units. The films with PEG10-CDPGYISGR covalently modified to the surface demonstrated 11.5% neurite expression with a mean neurite length of 90μm. This peptide immobilization technique provides an effective approach to biofunctionalize conducting polymer films. STATEMENT OF SIGNIFICANCE For enhanced diagnosis and treatment, electronic devices that interface with living tissue with minimum shortcomings are critical. Towards these ends, conducting polymers have proven to be excellent materials for electrode-tissue interface for a variety of biomedical devices ranging from deep brain stimulators, cochlear implants, and microfabricated cortical electrodes. To improve the electrode-tissue interface, one strategy utilized by many researchers is incorporating relevant biological molecules within or on the conducting polymer thin films to provide a surface for cell attachment and/or provide biological cues for cell growth. The present study provides a facile means for generating PEDOT films grafted with a laminin peptide with or without a spacer molecule for enhanced cell attachment and neurite extension.
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Affiliation(s)
- Nandita Bhagwat
- Department of Materials Science and Engineering, University of Delaware, 19716, USA
| | - Roy E Murray
- Department of Physics and Astronomy, University of Delaware, 19716, USA
| | - S Ismat Shah
- Department of Materials Science and Engineering, University of Delaware, 19716, USA; Department of Physics and Astronomy, University of Delaware, 19716, USA
| | - Kristi L Kiick
- Department of Materials Science and Engineering, University of Delaware, 19716, USA.
| | - David C Martin
- Department of Materials Science and Engineering, University of Delaware, 19716, USA.
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24
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Antonini S, Meucci S, Parchi P, Pacini S, Montali M, Poggetti A, Lisanti M, Cecchini M. Human mesenchymal stromal cell-enhanced osteogenic differentiation by contact interaction with polyethylene terephthalate nanogratings. Biomed Mater 2016; 11:045003. [PMID: 27388559 DOI: 10.1088/1748-6041/11/4/045003] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Among the very large number of polymeric materials that have been proposed in the field of orthopedics, polyethylene terephthalate (PET) is one of the most attractive thanks to its flexibility, thermal resistance, mechanical strength and durability. Several studies have been proposed that interface nano- or micro-structured surfaces with mesenchymal stromal cells (MSCs), demonstrating the potential of this technology for promoting osteogenesis. All these studies were carried out on biomaterials other than PET, which remains almost uninvestigated in terms of cell shaping, alignment and differentiation. Here, we study the effect of PET 350-depth nanogratings (NGs) with a ridge and lateral groove size of 500 nm (T1) or 1 μm (T2), on bone marrow-derived human MSC (hMSC) differentiation in relation to the osteogenic fate. We demonstrate that these substrates, especially T2, can promote the osteogenic phenotype more efficiently than standard flat surfaces and that this effect is more marked if cells are cultured in osteogenic medium than in basal medium. Finally, we show that the shape and disposition of calcium hydroxyapatite granules on the different substrates was influenced by the substrate symmetry, being more elongated and spatially organized on NGs than on flat surfaces.
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Affiliation(s)
- Sara Antonini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Piazza San Silvestro 12, Pisa 56127, Italy
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Baranes K, Shevach M, Shefi O, Dvir T. Gold Nanoparticle-Decorated Scaffolds Promote Neuronal Differentiation and Maturation. NANO LETTERS 2016; 16:2916-20. [PMID: 26674672 DOI: 10.1021/acs.nanolett.5b04033] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Engineered 3D neuronal networks are considered a promising approach for repairing the damaged spinal cord. However, the lack of a technological platform encouraging axonal elongation over branching may jeopardize the success of such treatment. To address this issue we have decorated gold nanoparticles on the surface of electrospun nanofiber scaffolds, characterized the composite material, and investigated their effect on the differentiation, maturation, and morphogenesis of primary neurons and on an immature neuronal cell line. We have shown that the nanocomposite scaffolds have encouraged a longer outgrowth of the neurites, as judged by the total length of the branching trees and the length and total distance of neurites. Moreover, neurons grown on the nanocomposite scaffolds had less neurites originating out of the soma and lower number of branches. Taken together, these results indicate that neurons cultivated on the gold nanoparticle scaffolds prefer axonal elongation over forming complex branching trees. We envision that such cellular constructs may be useful in the future as implantable cellular devices for repairing damaged neuronal tissues, such as the spinal cord.
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Affiliation(s)
- Koby Baranes
- Faculty of Engineering and ‡Institute of Nanotechnologies and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
- The Laboratory for Tissue Engineering and Regenerative Medicine, Department of Molecular Microbiology and Biotechnology, ∥Department of Materials Science and Engineering, and ⊥The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Michal Shevach
- Faculty of Engineering and ‡Institute of Nanotechnologies and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
- The Laboratory for Tissue Engineering and Regenerative Medicine, Department of Molecular Microbiology and Biotechnology, ∥Department of Materials Science and Engineering, and ⊥The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Orit Shefi
- Faculty of Engineering and ‡Institute of Nanotechnologies and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
- The Laboratory for Tissue Engineering and Regenerative Medicine, Department of Molecular Microbiology and Biotechnology, ∥Department of Materials Science and Engineering, and ⊥The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
| | - Tal Dvir
- Faculty of Engineering and ‡Institute of Nanotechnologies and Advanced Materials, Bar Ilan University , Ramat Gan 52900, Israel
- The Laboratory for Tissue Engineering and Regenerative Medicine, Department of Molecular Microbiology and Biotechnology, ∥Department of Materials Science and Engineering, and ⊥The Center for Nanoscience and Nanotechnology, Tel Aviv University , Tel Aviv 69978, Israel
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Tonazzini I, Meucci S, Van Woerden GM, Elgersma Y, Cecchini M. Impaired Neurite Contact Guidance in Ubiquitin Ligase E3a (Ube3a)-Deficient Hippocampal Neurons on Nanostructured Substrates. Adv Healthc Mater 2016; 5:850-62. [PMID: 26845073 DOI: 10.1002/adhm.201500815] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Revised: 11/09/2015] [Indexed: 12/21/2022]
Abstract
Recent discoveries indicate that during neuronal development the signaling processes that regulate extracellular sensing (e.g., adhesion, cytoskeletal dynamics) are important targets for ubiquitination-dependent regulation, in particular through E3 ubiquitin ligases. Among these, Ubiquitin E3a ligase (UBE3A) has a key role in brain functioning, but its function and how its deficiency results in the neurodevelopmental disorder Angelman syndrome is still unclear. Here, the role of UBE3A is investigated in neurite contact guidance during neuronal development, in vitro. The microtopography sensing of wild-type and Ube3a-deficient hippocampal neurons is studied by exploiting gratings with different topographical characteristics, with the aim to compare their capabilities to read and follow physical directional stimuli. It is shown that neuronal contact guidance is defective in Ube3a-deficient neurons, and this behavior is linked to an impaired activation of the focal adhesion signaling pathway. Taken together, the results suggest that the neuronal contact sensing machinery might be affected in Angelman syndrome.
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Affiliation(s)
- I. Tonazzini
- NEST; Istituto Nanoscienze-CNR and Scuola Normale Superiore; Piazza San Silvestro 12 56127 Pisa Italy
- Fondazione Umberto Veronesi; Piazza Velasca 5 20122 Milano Italy
| | - S. Meucci
- NEST; Istituto Nanoscienze-CNR and Scuola Normale Superiore; Piazza San Silvestro 12 56127 Pisa Italy
| | - G. M. Van Woerden
- Department of Neuroscience; ENCORE Expertise Center for Neurodevelopmental Disorders; Erasmus MC, Wytemaweg 80 3000 CA Rotterdam The Netherlands
| | - Y. Elgersma
- Department of Neuroscience; ENCORE Expertise Center for Neurodevelopmental Disorders; Erasmus MC, Wytemaweg 80 3000 CA Rotterdam The Netherlands
| | - M. Cecchini
- NEST; Istituto Nanoscienze-CNR and Scuola Normale Superiore; Piazza San Silvestro 12 56127 Pisa Italy
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Vasileiou T, Foresti D, Bayram A, Poulikakos D, Ferrari A. Toward Contactless Biology: Acoustophoretic DNA Transfection. Sci Rep 2016; 6:20023. [PMID: 26828312 PMCID: PMC4734324 DOI: 10.1038/srep20023] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 12/21/2015] [Indexed: 01/02/2023] Open
Abstract
Acoustophoresis revolutionized the field of container-less manipulation of liquids and solids by enabling mixing procedures which avoid contamination and loss of reagents due to the contact with the support. While its applications to chemistry and engineering are straightforward, additional developments are needed to obtain reliable biological protocols in a contactless environment. Here, we provide a first, fundamental step towards biological reactions in air by demonstrating the acoustophoretic DNA transfection of mammalian cells. We developed an original acoustophoretic design capable of levitating, moving and mixing biological suspensions of living mammalians cells and of DNA plasmids. The precise and sequential delivery of the mixed solutions into tissue culture plates is actuated by a novel mechanism based on the controlled actuation of the acoustophoretic force. The viability of the contactless procedure is tested using a cellular model sensitive to small perturbation of neuronal differentiation pathways. Additionally, the efficiency of the transfection procedure is compared to standard, container-based methods for both single and double DNA transfection and for different cell types including adherent growing HeLa cancer cells, and low adhesion neuron-like PC12 cells. In all, this work provides a proof of principle which paves the way to the development of high-throughput acoustophoretic biological reactors.
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Affiliation(s)
- Thomas Vasileiou
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
| | - Daniele Foresti
- Harvard University, School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Northwest Labs, B146.40, 52 Oxford Street, Cambridge, MA 02138, USA
| | - Adem Bayram
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
| | - Dimos Poulikakos
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
| | - Aldo Ferrari
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092 Zurich, Switzerland
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Tonazzini I, Jacchetti E, Meucci S, Beltram F, Cecchini M. Schwann Cell Contact Guidance versus Boundary -Interaction in Functional Wound Healing along Nano and Microstructured Membranes. Adv Healthc Mater 2015; 4:1849-60. [PMID: 26097140 DOI: 10.1002/adhm.201500268] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 05/27/2015] [Indexed: 01/09/2023]
Abstract
Peripheral nerve transection is often encountered after trauma and can lead to long-term/permanent loss of sensor/motor functionality. Here, the effect of pure contact interaction of nano/microgrooved substrates on Schwann cells (SCs) is studied in view of their possible use for nerve-repair applications. Elastomeric gratings (GRs; i.e., alternating lines of ridges and grooves) are developed with different lateral periods (1-20 μm) and depths (0.3-2.5 μm), leading to two distinct cell-material interaction regimes: contact guidance (grating period < cell body diameter) and boundary guidance (grating period ≥ cell body diameter). Here, it is shown that boundary guidance leads to the best single-cell polarization, actin organization, and single-cell directional migration. Remarkably, contact guidance is instead more effective in driving collective SC migration and improves functional wound healing. It is also demonstrated that this behavior is linked to the properties of the SC monolayers on different GRs. SCs on large-period GRs are characterized by N-Cadherin downregulation and enhanced single-cell scattering into the wound with respect to SCs on small-period GRs, indicating a less compact monolayer characterized by looser cell-cell junctions in the boundary guidance regime. The present results provide information on the impact of specific sub-micrometer topographical elements on SC functional response, which can be exploited for nerve-regeneration applications.
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Affiliation(s)
- Ilaria Tonazzini
- NEST, Scuola Normale Superiore; Piazza San Silvestro 12 Pisa 56127 Italy
- NEST, Istituto Nanoscienze-CNR; Piazza San Silvestro 12 Pisa 56127 Italy
- Fondazione Umberto Veronesi; Piazza Velasca 5 Milano 20122 Italy
| | - Emanuela Jacchetti
- NEST, Scuola Normale Superiore; Piazza San Silvestro 12 Pisa 56127 Italy
- NEST, Istituto Nanoscienze-CNR; Piazza San Silvestro 12 Pisa 56127 Italy
| | - Sandro Meucci
- NEST, Scuola Normale Superiore; Piazza San Silvestro 12 Pisa 56127 Italy
- NEST, Istituto Nanoscienze-CNR; Piazza San Silvestro 12 Pisa 56127 Italy
| | - Fabio Beltram
- NEST, Scuola Normale Superiore; Piazza San Silvestro 12 Pisa 56127 Italy
- NEST, Istituto Nanoscienze-CNR; Piazza San Silvestro 12 Pisa 56127 Italy
| | - Marco Cecchini
- NEST, Scuola Normale Superiore; Piazza San Silvestro 12 Pisa 56127 Italy
- NEST, Istituto Nanoscienze-CNR; Piazza San Silvestro 12 Pisa 56127 Italy
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Sergi PN, Marino A, Ciofani G. Deterministic control of mean alignment and elongation of neuron-like cells by grating geometry: a computational approach. Integr Biol (Camb) 2015; 7:1242-52. [PMID: 26114801 DOI: 10.1039/c5ib00045a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Neuron-like cells are driven by their surrounding environment through local topography. A causal mechanotransductive web of topography-force relationships influences and controls complex cellular phenomena such as growth and alignment. This work aimed to provide a computational framework able to model the behaviour of neuron-like (PC12) cells on gratings, accounting for the twofold ability of topographical cues to simultaneously align and enhance the growth of cells. In particular, starting from the mechanical behaviour of the growth cone and filopodia, the effect of grating geometry (e.g., the periodicity and the size of grooves and ridges) on the neuritic mean alignment angle and on the outgrowth rate of cells was explored through theoretical tools and combinatorial simulations, which were able to predict (R(2) > 0.9) experimental data in a time range of 72-120 hours.
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Affiliation(s)
- Pier Nicola Sergi
- The Biorobotics Institute, Scuola Superiore SantAnna, Viale Rinaldo Piaggio 34, Pontedera, 56025 Italy.
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Antonini S, Meucci S, Jacchetti E, Klingauf M, Beltram F, Poulikakos D, Cecchini M, Ferrari A. Sub-micron lateral topography affects endothelial migration by modulation of focal adhesion dynamics. ACTA ACUST UNITED AC 2015; 10:035010. [PMID: 26106866 DOI: 10.1088/1748-6041/10/3/035010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Through the interaction with topographical features, endothelial cells tune their ability to populate target substrates, both in vivo and in vitro. Basal textures interfere with the establishment and maturation of focal adhesions (FAs) thus inducing specific cell-polarization patterns and regulating a plethora of cell activities that govern the overall endothelial function. In this study, we analyze the effect of topographical features on FAs in primary human endothelial cells. Reported data demonstrate a functional link between FA dynamics and cell polarization and spreading on structured substrates presenting variable lateral feature size. Our results reveal that gratings with 2 µm lateral periodicity maximize contact guidance. The effect is linked to the dynamical state of FAs. We argue that these results are readily applicable to the rational design of active surfaces at the interface with the blood stream.
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Affiliation(s)
- S Antonini
- NEST, Istituto Nanoscienze-CNR and Scuola Normale Superiore, Piazza San Silvestro, 12, I-56126 Pisa, Italy
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31
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Mattotti M, Micholt L, Braeken D, Kovačić D. Characterization of spiral ganglion neurons cultured on silicon micro-pillar substrates for new auditory neuro-electronic interfaces. J Neural Eng 2015; 12:026001. [DOI: 10.1088/1741-2560/12/2/026001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Krawczyk P, Twarog E, Kurowska E, Klopotowska D, Matuszyk J. Establishment of a cellular model to study TrkC-dependent neuritogenesis. In Vitro Cell Dev Biol Anim 2014; 51:241-8. [PMID: 25398493 DOI: 10.1007/s11626-014-9829-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 09/23/2014] [Indexed: 12/22/2022]
Abstract
The rat PC12 cell line has become a widely used research tool for many aspects of neurobiology. Nerve growth factor (NGF)-responsive PC12 cells were engineered to drive expression of doxycycline (Dox)-induced gene of interest in the Tet-On expression system that resulted in obtaining PC12-Tet-On cells. TrkA and TrkC are neurotrophin receptors derived from the tropomyosin-related kinase (Trk) family of receptor tyrosine kinases. TrkA receptor binds and is activated mainly by NGF, while TrkC receptor binds and is activated by neurotrophin 3 (NT3). The purpose of this research was to design and describe PC12-based neuronal cell model to study TrkC-triggered versus TrkA-triggered neurite outgrowth. The second-generation tetracycline-responsive promoter (P tight) was used in order to provide low basal expression in the absence of Dox and high-level Dox-induced expression of TrkC. The main advantage of presented model system is dependence of TrkC level on Dox concentration. It also allows to compare activation of intracellular signaling proteins and neurite outgrowth following activation of TrkA and TrkC receptors by NGF and NT3, respectively, in the context of the same quality and quantity of intracellular adaptor proteins, Ras proteins, protein kinases and phosphatases, and phospholipase Cγ1, as a difference in the activation of intracellular signaling network by these two distinct although related receptor tyrosine kinases is expected. The results of our studies suggest that despite slightly weaker activation of ERK1/2 mitogen-activated protein kinases, NT3-triggered TrkC seems to provide apparently stronger than NGF-triggered TrkA signal for neurite elongation in differentiating PC12 cells.
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Chung J, Miura N, Ito A, Sawada M, Nishikawa S, Kuroda K, Ueda M. Single-cell heterogeneity in suppression of PC12 differentiation by direct microinjection of a differentiation inhibitor, U0126. Cell Biol Int 2014; 38:1215-20. [PMID: 24797702 DOI: 10.1002/cbin.10296] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 04/10/2014] [Indexed: 11/12/2022]
Abstract
Phenotypic and genomic heterogeneity among single cells in a cell population leads to inaccuracy and obscuration in research about mammalian cell differentiation. In order to address the problems regarding bulk analysis on heterogeneous cell populations, it is necessary to accurately regulate and analyze changes in differentiating cells at the single-cell level. To investigate the single-cell changes in PC12 neuronal differentiation that occur when inhibited by U0126, an inhibitor of mitogen-activated protein kinase kinase (MEK), we directly injected the chemical into individual target cells and analyzed the outcomes (neurite outgrowth) at the single-cell level. As a result, we could accurately regulate the quantity of U0126 being introduced into each target cell, which was previously not possible using the common method of simply adding the inhibitor to the culture medium. It was possible to analyze the inhibitive effect of U0126 even when the injected quantity was lower than the lower limit for inhibition when added to culture medium (0.1 μM, identical to 1.2 × 10(8) molecules per cell on dish). In particular, injection of 1.5 × 10(7) molecules into each cell resulted in a 59% decrease of the mean total neurite length. Time-course analysis of neurite outgrowth at the single-cell level using fluorescence staining method showed that the changes in neurite length of differentiating PC12 cells were not homogeneous, but were largely variable across individual target cells.
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Affiliation(s)
- Jihye Chung
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
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34
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The effect of substrate topography on direct reprogramming of fibroblasts to induced neurons. Biomaterials 2014; 35:5327-5336. [PMID: 24709523 DOI: 10.1016/j.biomaterials.2014.03.034] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 03/14/2014] [Indexed: 11/23/2022]
Abstract
Cellular reprogramming holds tremendous potential for cell therapy and regenerative medicine. Recently, fibroblasts have been directly converted into induced neurons (iNs) by overexpression of the neuronal transcription factors Ascl1, Brn2 and Myt1L. Hypothesizing that cell-topography interactions could influence the fibroblast-to-neuron reprogramming process, we investigated the effects of various topographies on iNs produced by direct reprogramming. Final iN purity and conversion efficiency were increased on micrograting substrates. Neurite branching was increased on microposts and decreased on microgratings, with a simplified dendritic arbor characterized by the reduction of MAP2(+) neurites. Neurite outgrowth increased significantly on various topographies. DNA microarray analysis detected 20 differentially expressed genes in iNs reprogrammed on smooth versus microgratings, and quantitative PCR (qPCR) confirmed the upregulation of Vip and downregulation of Thy1 and Bmp5 on microgratings. Electrophysiology and calcium imaging verified the functionality of these iNs. This study demonstrates the potential of applying topographical cues to optimize cellular reprogramming.
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Tonazzini I, Cecchini A, Elgersma Y, Cecchini M. Interaction of SH-SY5Y cells with nanogratings during neuronal differentiation: comparison with primary neurons. Adv Healthc Mater 2014; 3:581-7. [PMID: 24115396 DOI: 10.1002/adhm.201300216] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Revised: 08/02/2013] [Indexed: 11/08/2022]
Abstract
Controlling neuronal cell adhesion, migration, and axonal outgrowth via contact interactions with biomaterials is a critical element for tissue engineering applications and for developing artificial neuronal interfaces. One promising approach relies on the exploitation of nanostructured surfaces. Here, the human neuroblastoma cell line SH-SY5Y is interfaced with plastic nanogratings (NGs; anisotropic topographies composed by alternating lines of grooves and ridges with sub-micrometer lateral dimension). The SH-SY5Y cells' (SHs) contact guidance is investigated under proliferating conditions and upon differentiation after treatment with retinoic acid (RA) and brain-derived neurotrophin factor (BDNF), and compared with mouse primary hippocampal neurons (HNs). Quantitative readouts are obtained by measuring changes in tubulin cytoskeleton organization and cell morphology induced by mechanotransduction. Results demonstrate that SHs effectively retrieve substrate topographical signals, in particular during differentiation. Remarkably, RA/BDNF improves SH responsiveness to NG directional cues, and significantly enhances the alignment to the NG lines. HNs behave similarly, showing a marked change in network organization if cultured on NGs. These results might help the rational engineering of neuro-regenerative scaffolds to improve peripheral nerve wound healing, as well as to investigate the basic mechanisms of neuronal wiring.
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Affiliation(s)
- Ilaria Tonazzini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR; Piazza San Silvestro 12 56127 Pisa Italy
| | - Alessandra Cecchini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR; Piazza San Silvestro 12 56127 Pisa Italy
| | - Ype Elgersma
- Department of Neuroscience; Erasmus MC 3015 GE Rotterdam the Netherlands
| | - Marco Cecchini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR; Piazza San Silvestro 12 56127 Pisa Italy
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36
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Tonazzini I, Pellegrini M, Pellegrino M, Cecchini M. Interaction of leech neurons with topographical gratings: comparison with rodent and human neuronal lines and primary cells. Interface Focus 2014; 4:20130047. [PMID: 24501675 DOI: 10.1098/rsfs.2013.0047] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Controlling and improving neuronal cell migration and neurite outgrowth are critical elements of tissue engineering applications and development of artificial neuronal interfaces. To this end, a promising approach exploits nano/microstructured surfaces, which have been demonstrated to be capable of tuning neuronal differentiation, polarity, migration and neurite orientation. Here, we investigate the neurite contact guidance of leech neurons on plastic gratings (GRs; anisotropic topographies composed of alternating lines of grooves and ridges). By high-resolution microscopy, we quantitatively evaluate the changes in tubulin cytoskeleton organization and cell morphology and in the neurite and growth cone development. The topography-reading process of leech neurons on GRs is mediated by filopodia and is more responsive to 4-µm-period GRs than to smaller period GRs. Leech neuron behaviour on GRs is finally compared and validated with several other neuronal cells, from murine differentiated embryonic stem cells and primary hippocampal neurons to differentiated human neuroblastoma cells.
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Affiliation(s)
- Ilaria Tonazzini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza San Silvestro 12, Pisa 56127 , Italy
| | - Monica Pellegrini
- Scuola Normale Superiore , Piazza dei Cavalieri 7, Pisa 56126 , Italy
| | - Mario Pellegrino
- Dipartimento di Ricerca Traslazionale e Delle Nuove Tecnologie in Medicina e Chirurgia , Università di Pisa , Via S. Zeno 31, 56127 Pisa , Italy
| | - Marco Cecchini
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza San Silvestro 12, Pisa 56127 , Italy
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37
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Meucci S, Travagliati M, Vittorio O, Cirillo G, Masini L, Voliani V, Picci N, Beltram F, Tredicucci A, Cecchini M. Tubeless biochip for chemical stimulation of cells in closed-bioreactors: anti-cancer activity of the catechin–dextran conjugate. RSC Adv 2014. [DOI: 10.1039/c4ra05496b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Here we introduce a tubeless microbioreactor for chemically stimulation of cells in microchambers, based on automatic cell valving, hydrostatic-pressure pumping and on-chip liquid reservoirs.
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Affiliation(s)
- Sandro Meucci
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
| | - Marco Travagliati
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
| | - Orazio Vittorio
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
| | - Giuseppe Cirillo
- Department of Pharmacy
- Health and Nutritional Sciences
- University of Calabria
- I-87036 Rende (CS), Italy
- Leibniz Institute for Solid State and Materials Research Dresden
| | - Luca Masini
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
| | - Valerio Voliani
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
| | - Nevio Picci
- Department of Pharmacy
- Health and Nutritional Sciences
- University of Calabria
- I-87036 Rende (CS), Italy
| | - Fabio Beltram
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
- Center for Nanotechnology Innovation@NEST
- Istituto Italiano di Tecnologia
| | | | - Marco Cecchini
- NEST
- Scuola Normale Superiore and Istituto Nanoscienze-CNR
- Pisa 56127, Italy
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38
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Marino A, Ciofani G, Filippeschi C, Pellegrino M, Pellegrini M, Orsini P, Pasqualetti M, Mattoli V, Mazzolai B. Two-photon polymerization of sub-micrometric patterned surfaces: investigation of cell-substrate interactions and improved differentiation of neuron-like cells. ACS APPLIED MATERIALS & INTERFACES 2013; 5:13012-21. [PMID: 24309089 DOI: 10.1021/am403895k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Direct Laser Writing (DLW) is an innovative tool that allows the photofabrication of high resolution 3D structures, which can be successfully exploited for the study of the physical interactions between cells and substrates. In this work, we focused our attention on the topographical effects of submicrometric patterned surfaces fabricated via DLW on neuronal cell behavior. In particular, we designed, prepared, and characterized substrates based on aligned ridges for the promotion of axonal outgrowth and guidance. We demonstrated that both rat PC12 neuron-like cells and human SH-SY5Y derived neurons differentiate on parallel 2.5 μm spaced submicrometric ridges, being characterized by strongly aligned and significantly longer neurites with respect to those differentiated on flat control substrates, or on more spaced (5 and 10 μm) ridges. Furthermore, we detected an increased molecular differentiation toward neurons of the SH-SY5Y cells when grown on the submicrometric patterned substrates. Finally, we observed that the axons can exert forces able of bending the ridges, and we indirectly estimated the order of magnitude of these forces thanks to scanning probe techniques. Collectively, we showed as submicrometric structures fabricated by DLW can be used as a useful tool for the study of the axon mechanobiology.
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Affiliation(s)
- Attilio Marino
- Center for Micro-BioRobotics @SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
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Kim MH, Park M, Kang K, Choi IS. Neurons on nanometric topographies: insights into neuronal behaviors in vitro. Biomater Sci 2013; 2:148-155. [PMID: 32481875 DOI: 10.1039/c3bm60255a] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Topography, the physical characteristics of an environment, is one of the most prominent stimuli neurons can encounter in the body. Many aspects of neurons and neuronal behavior are affected by the size, shape, and pattern of the physical features of the environment. A recent increase in the use of nanometric topographies, due to improved fabrication techniques, has resulted in new findings on neuronal behavior and development. Factors such as neuron adhesion, neurite alignment, and even the rate of neurite formation have all been highlighted through nanotopographies as complex phenomena that are driven by intricate intracellular mechanisms. Nanotopographies are suitable platforms, not only for fundamental studies on neuronal development, but also in practical applications, including multielectrode array devices and neuro-regenerative medicine. We reviewed recent publications that address the effects of nanotopography on neurons and categorized the observed behaviors as adherence, directional guidance, or accelerated outgrowth. We also discussed possible biological mechanisms of the molecular and cellular responses to topography, and suggested future perspectives for this field.
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Affiliation(s)
- Mi-Hee Kim
- Center for Cell-Encapsulation Research and Molecular-Level Interface Research Center, Department of Chemistry, KAIST, Daejeon 305-701, Korea
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Tamplenizza M, Lenardi C, Maffioli E, Nonnis S, Negri A, Forti S, Sogne E, De Astis S, Matteoli M, Schulte C, Milani P, Tedeschi G. Nitric oxide synthase mediates PC12 differentiation induced by the surface topography of nanostructured TiO2. J Nanobiotechnology 2013; 11:35. [PMID: 24119372 PMCID: PMC3815074 DOI: 10.1186/1477-3155-11-35] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Accepted: 09/02/2013] [Indexed: 12/12/2022] Open
Abstract
Background Substrate nanoscale topography influences cell proliferation and differentiation through mechanisms that are at present poorly understood. In particular the molecular mechanism through which cells 'sense’ and adapt to the substrate and activate specific intracellular signals, influencing cells survival and behavior, remains to be clarified. Results To characterize these processes at the molecular level we studied the differentiation of PC12 cells on nanostructured TiO2 films obtained by supersonic cluster beam deposition. Our findings indicate that, in PC12 cells grown without Nerve Growth Factor (NGF), the roughness of nanostructured TiO2 triggers neuritogenesis by activating the expression of nitric oxide synthase (NOS) and the phospho-extracellular signal-regulated kinase 1/2 (pERK1/2) signaling. Differentiation is associated with an increase in protein nitration as observed in PC12 cells grown on flat surfaces in the presence of NGF. We demonstrate that cell differentiation and protein nitration induced by topography are not specific for PC12 cells but can be regarded as generalized effects produced by the substrate on different neuronal-like cell types, as shown by growing the human neuroblastoma SH-SY5Y cell line on nanostructured TiO2. Conclusion Our data provide the evidence that the nitric oxide (NO) signal cascade is involved in the differentiation process induced by nanotopography, adding new information on the mechanism and proteins involved in the neuritogenesis triggered by the surface properties.
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Affiliation(s)
- Margherita Tamplenizza
- CIMAINA and Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, Milano 20133, Italy.
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Sergi PN, Morana Roccasalvo I, Tonazzini I, Cecchini M, Micera S. Cell guidance on nanogratings: a computational model of the interplay between PC12 growth cones and nanostructures. PLoS One 2013; 8:e70304. [PMID: 23936404 PMCID: PMC3735603 DOI: 10.1371/journal.pone.0070304] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Accepted: 06/17/2013] [Indexed: 12/05/2022] Open
Abstract
Background Recently, the effects of nanogratings have been investigated on PC12 with respect to cell polarity, neuronal differentiation, migration, maturation of focal adhesions and alignment of neurites. Methodology/Principal Findings A synergistic procedure was used to study the mechanism of alignment of PC12 neurites with respect to the main direction of nanogratings. Finite Element simulations were used to qualitatively assess the distribution of stresses at the interface between non-spread growth cones and filopodia, and to study their dependence on filopodial length and orientation. After modelling all adhesions under non-spread growth cone and filopodial protrusions, the values of local stress maxima resulted from the length of filopodia. Since the stress was assumed to be the main triggering cause leading to the increase and stabilization of filopodia, the position of the local maxima was directly related to the orientation of neurites. An analytic closed form equation was then written to quantitatively assess the average ridge width needed to achieve a given neuritic alignment (R2 = 0.96), and the alignment course, when the ridge depth varied (R2 = 0.97). A computational framework was implemented within an improved free Java environment (CX3D) and in silico simulations were carried out to reproduce and predict biological experiments. No significant differences were found between biological experiments and in silico simulations (alignment, p = 0.3571; tortuosity, p = 0.2236) with a standard level of confidence (95%). Conclusions/Significance A mechanism involved in filopodial sensing of nanogratings is proposed and modelled through a synergistic use of FE models, theoretical equations and in silico simulations. This approach shows the importance of the neuritic terminal geometry, and the key role of the distribution of the adhesion constraints for the cell/substrate coupling process. Finally, the effects of the geometry of nanogratings were explicitly considered in cell/surface interactions thanks to the analytic framework presented in this work.
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Affiliation(s)
- Pier Nicola Sergi
- Neural Engineering Area, The BioRobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy.
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Tonazzini I, Meucci S, Faraci P, Beltram F, Cecchini M. Neuronal differentiation on anisotropic substrates and the influence of nanotopographical noise on neurite contact guidance. Biomaterials 2013; 34:6027-36. [DOI: 10.1016/j.biomaterials.2013.04.039] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 04/21/2013] [Indexed: 10/26/2022]
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Jia L, Prabhakaran MP, Qin X, Ramakrishna S. Stem cell differentiation on electrospun nanofibrous substrates for vascular tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:4640-50. [PMID: 24094171 DOI: 10.1016/j.msec.2013.07.021] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 06/01/2013] [Accepted: 07/17/2013] [Indexed: 12/16/2022]
Abstract
Nanotechnology has enabled the engineering of a variety of materials to meet the current challenges and requirements in vascular tissue regeneration. In our study, poly-L-lactide (PLLA) and hybrid PLLA/collagen (PLLA/Coll) nanofibers (3:1 and 1:1) with fiber diameters of 210 to 430 nm were fabricated by electrospinning. Their morphological, chemical and mechanical characterizations were carried out using scanning electron microscopy (SEM), attenuated total reflectance Fourier transform infrared (ATR-FTIR), and tensile instrument, respectively. Bone marrow derived mesenchymal stem cells (MSCs) seeded on electrospun nanofibers that are capable of differentiating into vascular cells have great potential for repair of the vascular system. We investigated the potential of MSCs for vascular cell differentiation in vitro on electrospun PLLA/Coll nanofibrous scaffolds using endothelial differentiation media. After 20 days of culture, MSC proliferation on PLLA/Coll(1:1) scaffolds was found 256% higher than the cell proliferation on PLLA scaffolds. SEM images showed that the MSC differentiated endothelial cells on PLLA/Coll scaffolds showed cobblestone morphology in comparison to the fibroblastic type of undifferentiated MSCs. The functionality of the cells in the presence of 'endothelial induction media', was further demonstrated from the immunocytochemical analysis, where the MSCs on PLLA/Coll (1:1) scaffolds differentiated to endothelial cells and expressed the endothelial cell specific proteins such as platelet endothelial cell adhesion molecule-1 (PECAM-1 or CD31) and Von Willebrand factor (vWF). From the results of the SEM analysis and protein expression studies, we concluded that the electrospun PLLA/Coll nanofibers could mimic the native vascular ECM environment and might be promising substrates for potential application towards vascular regeneration.
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Affiliation(s)
- Lin Jia
- Key Laboratory of Textile Science & Technology, Ministry of Education, College of Textiles, Donghua University, No. 2999 North Renmin Road, Songjiang, Shanghai 201620, China; Center for Nanofibers and Nanotechnology, E3-05-14, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, 2 Engineering Drive 3, Singapore 117576, Singapore
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Orsenigo F, Giampietro C, Ferrari A, Corada M, Galaup A, Sigismund S, Ristagno G, Maddaluno L, Koh GY, Franco D, Kurtcuoglu V, Poulikakos D, Baluk P, McDonald D, Grazia Lampugnani M, Dejana E. Phosphorylation of VE-cadherin is modulated by haemodynamic forces and contributes to the regulation of vascular permeability in vivo. Nat Commun 2013; 3:1208. [PMID: 23169049 PMCID: PMC3514492 DOI: 10.1038/ncomms2199] [Citation(s) in RCA: 334] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Accepted: 10/12/2012] [Indexed: 12/23/2022] Open
Abstract
Endothelial adherens junctions maintain vascular integrity. Arteries and veins differ in their permeability but whether organization and strength of their adherens junctions vary has not been demonstrated in vivo. Here we report that vascular endothelial cadherin, an endothelial specific adhesion protein located at adherens junctions, is phosphorylated in Y658 and Y685 in vivo in veins but not in arteries under resting conditions. This difference is due to shear stress-induced junctional Src activation in veins. Phosphorylated vascular endothelial-cadherin is internalized and ubiquitinated in response to permeability-increasing agents such as bradykinin and histamine. Inhibition of Src blocks vascular endothelial cadherin phosphorylation and bradykinin-induced permeability. Point mutation of Y658F and Y685F prevents vascular endothelial cadherin internalization, ubiquitination and an increase in permeability by bradykinin in vitro. Thus, phosphorylation of vascular endothelial cadherin contributes to a dynamic state of adherens junctions, but is not sufficient to increase vascular permeability in the absence of inflammatory agents. Vascular endothelial-cadherin is a junctional protein implicated in the control of vascular permeability. Orsenigo et al. find that vascular endothelial-cadherin is phosphorylated in veins but not in arteries of mice, and that this sensitizes vessels to rapid changes in permeability in response to inflammatory mediators.
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Affiliation(s)
- Fabrizio Orsenigo
- FIRC Institute of Molecular Oncology, Via Adamello 16, 20139 Milan, Italy
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Vittorio O, Jacchetti E, Pacini S, Cecchini M. Endothelial differentiation of mesenchymal stromal cells: when traditional biology meets mechanotransduction. Integr Biol (Camb) 2013; 5:291-9. [DOI: 10.1039/c2ib20152f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Moe AAK, Suryana M, Marcy G, Lim SK, Ankam S, Goh JZW, Jin J, Teo BKK, Law JBK, Low HY, Goh ELK, Sheetz MP, Yim EKF. Microarray with micro- and nano-topographies enables identification of the optimal topography for directing the differentiation of primary murine neural progenitor cells. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:3050-61. [PMID: 22807278 DOI: 10.1002/smll.201200490] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Indexed: 05/25/2023]
Abstract
During development and tissue repair, progenitor cells are guided by both biochemical and biophysical cues of their microenvironment, including topographical signals. The topographical cues have been shown to play an important role in controlling the fate of cells. Systematic investigation of topographical structures with different geometries and sizes under the identical experimental conditions on the same chip will enhance the understanding of the role of shape and size in cell-topography interactions. A simple customizable multi-architecture chip (MARC) array is therefore developed to incorporate, on a single chip, distinct topographies of various architectural complexities, including both isotropic and anisotropic features, in nano- to micrometer dimensions, with different aspect ratios and hierarchical structures. Polydimethylsiloxane (PDMS) replicas of MARC are used to investigate the influence of different geometries and sizes in neural differentiation of primary murine neural progenitor cells (mNPCs). Anisotropic gratings (2 μm gratings, 250 nm gratings) and isotropic 1 μm pillars significantly promote differentiation of mNPCs into neurons, as indicated by expression of β-III-tubulin (59%, 58%, and 58%, respectively, compared to 30% on the control). In contrast, glial differentiation is enhanced on isotropic 2 μm holes and 1 μm pillars. These results illustrate that anisotropic topographies enhance neuronal differentiation while isotropic topographies enhance glial differentiation on the same chip under the same conditions. MARC enables simultaneous cost-effective investigation of multiple topographies, allowing efficient optimization of topographical and biochemical cues to modulate cell differentiation.
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Affiliation(s)
- Aung Aung Kywe Moe
- Department of Bioengineering, National University of Singapore, EA-03-12, 9 Engineering Drive 1, Singapore
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Lu CH, Hsiao YS, Kuo CW, Chen P. Electrically tunable organic bioelectronics for spatial and temporal manipulation of neuron-like pheochromocytoma (PC-12) cells. Biochim Biophys Acta Gen Subj 2012; 1830:4321-8. [PMID: 22982010 DOI: 10.1016/j.bbagen.2012.08.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 08/30/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Organic bioelectronic devices consisting of alternating poly(3,4-ethylenedioxythiophene) (PEDOT) and reduced graphite oxide (rGO) striped microelectrode arrays were fabricated by lithography technology. It has been demonstrated that the organic bioelectronic devices can be used to spatially and temporally manipulate the location and proliferation of the neuron-like pheochromocytoma cells (PC-12 cells). METHODS By coating an electrically labile contact repulsion layer of poly(l-lysine-graft-ethylene glycol) (PLL-g-PEG) on the PEDOT electrode, the location and polarity of the PC-12 cells were confined to the rGO electrodes. RESULTS The outgrowth of spatially confined bipolar neurites was found to align along the direction of the 20μm wide electrode. The location of the PC-12 cells can also be manipulated temporally by applying electrical stimulation during the neurite differentiation of PC-12 cells, allowing the PC-12 cells to cross over the boundary between the PEDOT and the rGO regions and construct neurite networks in an unconfined manner where the contact repulsive coating of PLL-g-PEG was removed. CONCLUSIONS This adsorption and desorption of the PLL-g-PEG without and with electrical stimulation can be attributed to the tunable surface properties of the PEDOT microelectrodes, whose surface charge can switch from being negative to positive under electrical stimulation. GENERAL SIGNIFICANCE The electrically tunable organic bioelectronics reported here could potentially be applied to tissue engineering related to the development and regeneration of mammalian nervous systems. The spatial and temporal control in this device would also be used to study the synapse junctions of neuron-neuron contacts in both time and space domains. This article is part of a Special Issue entitled Organic Bioelectronics - Novel Applications in Biomedicine.
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Affiliation(s)
- Chu-Hua Lu
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan
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Wieringa P, Tonazzini I, Micera S, Cecchini M. Nanotopography induced contact guidance of the F11 cell line during neuronal differentiation: a neuronal model cell line for tissue scaffold development. NANOTECHNOLOGY 2012; 23:275102. [PMID: 22710035 DOI: 10.1088/0957-4484/23/27/275102] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The F11 hybridoma, a dorsal root ganglion-derived cell line, was used to investigate the response of nociceptive sensory neurons to nanotopographical guidance cues. This established this cell line as a model of peripheral sensory neuron growth for tissue scaffold design. Cells were seeded on substrates of cyclic olefin copolymer (COC) films imprinted via nanoimprint lithography (NIL) with a grating pattern of nano-scale grooves and ridges. Different ridge widths were employed to alter the focal adhesion formation, thereby changing the cell/substrate interaction. Differentiation was stimulated with forskolin in culture medium consisting of either 1 or 10% fetal bovine serum (FBS). Per medium condition, similar neurite alignment was achieved over the four day period, with the 1% serum condition exhibiting longer, more aligned neurites. Immunostaining for focal adhesions found the 1% FBS condition to also have fewer, less developed focal adhesions. The robust response of the F11 to guidance cues further builds on the utility of this cell line as a sensory neuron model, representing a useful tool to explore the design of regenerative guidance tissue scaffolds.
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Affiliation(s)
- Paul Wieringa
- The BioRobotics Institute, Scuola Superiore Sant' Anna, Viale le Rinaldo Piaggio 34, 56025 Pontedera, Italy.
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García-Parra P, Cavaliere F, Maroto M, Bilbao L, Obieta I, López de Munain A, Alava JI, Izeta A. Modeling neural differentiation on micropatterned substrates coated with neural matrix components. Front Cell Neurosci 2012; 6:10. [PMID: 22435050 PMCID: PMC3303083 DOI: 10.3389/fncel.2012.00010] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 02/28/2012] [Indexed: 01/28/2023] Open
Abstract
Topographical and biochemical characteristics of the substrate are critical for neuronal differentiation including axonal outgrowth and regeneration of neural circuits in vivo. Contact stimuli and signaling molecules allow neurons to develop and stabilize synaptic contacts. Here we present the development, characterization and functional validation of a new polymeric support able to induce neuronal differentiation in both PC12 cell line and adult primary skin-derived precursor cells (SKPs) in vitro. By combining a photolithographic technique with use of neural extracellular matrix (ECM) as a substrate, a biocompatible and efficient microenvironment for neuronal differentiation was developed.
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Affiliation(s)
- Patricia García-Parra
- Biomaterials-Tissue Engineering Unit, Tecnalia Research and Innovation San Sebastian, Spain
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Knight DK, Stutchbury R, Imruck D, Halfpap C, Lin S, Langbein U, Gillies ER, Mittler S, Mequanint K. Focal contact formation of vascular smooth muscle cells on Langmuir-Blodgett and solvent-cast films of biodegradable poly(ester amide)s. ACS APPLIED MATERIALS & INTERFACES 2012; 4:1303-1312. [PMID: 22324781 DOI: 10.1021/am201582q] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The ability of biomaterials to support the adhesion of cells is a necessary condition for their use in scaffold-guided tissue engineering. Waveguide evanescent field fluorescence (WEFF) microscopy is a relatively new microscopic technique that allows the number of cell adhesions to a waveguide surface be measured by imaging the interfacial contact region between the cells and their substratum. In this work, the adhesion of human coronary artery smooth muscle cells (HCASMCs) to ultrathin films (20 nm) of poly(ester amide)s (PEAs) prepared by Langmuir-Blodgett (LB) technology on waveguides was investigated and compared with conventional vinculin immunostaining on solvent cast PEA films. Cell culture was conducted both in the presence and absence of serum to evaluate the effect of nonspecific protein adsorption that mediates cell adhesion. WEFF microscopy analyses revealed that the cationic PEA enhanced the number of attachment sites compared with the control waveguides regardless of the culture medium. Although differences in cell adhesions between different PEAs were suggested by the results, no statistically significant differences were found. Similar results were observed with presently and previously reported vinculin immunostaining studies, further validating the use of WEFF microscopy to quantify cell adhesions. Moreover, the focal adhesions of the HCASMCs to the PEA surfaces indicate these PEAs can promote integrin signaling, which is vital in cell survival, migration, and proliferation, and ultimately in scaffold-guided vascular tissue engineering.
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Affiliation(s)
- Darryl K Knight
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada
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