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Luo W, Zhang H, Wan R, Cai Y, Liu Y, Wu Y, Yang Y, Chen J, Zhang D, Luo Z, Shang X. Biomaterials-Based Technologies in Skeletal Muscle Tissue Engineering. Adv Healthc Mater 2024; 13:e2304196. [PMID: 38712598 DOI: 10.1002/adhm.202304196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 04/26/2024] [Indexed: 05/08/2024]
Abstract
For many clinically prevalent severe injuries, the inherent regenerative capacity of skeletal muscle remains inadequate. Skeletal muscle tissue engineering (SMTE) seeks to meet this clinical demand. With continuous progress in biomedicine and related technologies including micro/nanotechnology and 3D printing, numerous studies have uncovered various intrinsic mechanisms regulating skeletal muscle regeneration and developed tailored biomaterial systems based on these understandings. Here, the skeletal muscle structure and regeneration process are discussed and the diverse biomaterial systems derived from various technologies are explored in detail. Biomaterials serve not merely as local niches for cell growth, but also as scaffolds endowed with structural or physicochemical properties that provide tissue regenerative cues such as topographical, electrical, and mechanical signals. They can also act as delivery systems for stem cells and bioactive molecules that have been shown as key participants in endogenous repair cascades. To achieve bench-to-bedside translation, the typical effect enabled by biomaterial systems and the potential underlying molecular mechanisms are also summarized. Insights into the roles of biomaterials in SMTE from cellular and molecular perspectives are provided. Finally, perspectives on the advancement of SMTE are provided, for which gene therapy, exosomes, and hybrid biomaterials may hold promise to make important contributions.
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Affiliation(s)
- Wei Luo
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Hanli Zhang
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Renwen Wan
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Yuxi Cai
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Yinuo Liu
- The Second Clinical Medical College of Nanchang University, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, 330006, P. R. China
| | - Yang Wu
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Yimeng Yang
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Jiani Chen
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Deju Zhang
- Food and Nutritional Sciences, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, Hong Kong
| | - Zhiwen Luo
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
| | - Xiliang Shang
- Department of Sports Medicine Huashan Hospital, Fudan University, Shanghai, 200040, P. R. China
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Iqbal MH, Kerdjoudj H, Boulmedais F. Protein-based layer-by-layer films for biomedical applications. Chem Sci 2024; 15:9408-9437. [PMID: 38939139 PMCID: PMC11206333 DOI: 10.1039/d3sc06549a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 05/03/2024] [Indexed: 06/29/2024] Open
Abstract
The surface engineering of biomaterials is crucial for their successful (bio)integration by the body, i.e. the colonization by the tissue-specific cell, and the prevention of fibrosis and/or bacterial colonization. Performed at room temperature in an aqueous medium, the layer-by-layer (LbL) coating method is based on the alternating deposition of macromolecules. Versatile and simple, this method allows the functionalization of surfaces with proteins, which play a crucial role in several biological mechanisms. Possessing intrinsic properties (cell adhesion, antibacterial, degradable, etc.), protein-based LbL films represent a powerful tool to control bacterial and mammalian cell fate. In this article, after a general introduction to the LbL technique, we will focus on protein-based LbL films addressing different biomedical issues/domains, such as bacterial infection, blood contacting surfaces, mammalian cell adhesion, drug and gene delivery, and bone and neural tissue engineering. We do not consider biosensing applications or electrochemical aspects using specific proteins such as enzymes.
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Affiliation(s)
- Muhammad Haseeb Iqbal
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, Strasbourg Cedex 2 67034 France
| | | | - Fouzia Boulmedais
- Université de Strasbourg, CNRS, Institut Charles Sadron UPR 22, Strasbourg Cedex 2 67034 France
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Kitagawa IL, Miyazaki CM, Pitol-Palin L, Okamoto R, de Vasconcellos LMR, Constantino CJL, Lisboa-Filho PN. Titanium-Based Alloy Surface Modification with TiO 2 and Poly(sodium 4-styrenesulfonate) Multilayers for Dental Implants. ACS APPLIED BIO MATERIALS 2021; 4:3055-3066. [PMID: 35014394 DOI: 10.1021/acsabm.0c01348] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Implant placement is an important repair method in dentistry and orthopedics. Increasing efforts have focused on optimizing the biocompatibility and osseointegration properties of titanium (Ti) and Ti-based alloys. In this work, Ti-based alloys were modified by the layer-by-layer (LbL) technique, which is a simple and versatile method for surface modification. The morphology and chemical structure of LbL films of poly(sodium 4-styrenesulfonate) (PSS) and Ti dioxide (TiO2) nanoparticles were first characterized employing ultraviolet-visible and Fourier-transform infrared spectroscopies as well as atomic force microscopy for further application in Ti-based alloy implants. The changes provoked by the LbL PSS/TiO2 film on the Ti-based alloy surfaces were then investigated by scanning electron microscopy and micro-Raman techniques. Finally, in vivo tests (immunolabeling and biomechanical analysis) performed with screw implants in rats suggested that PSS/TiO2 multilayers promote changes in both topography and chemical surface properties of the screw, providing beneficial effects for osteoblast activity. This simple and relatively low-cost growth process can open up possibilities to improve dental implants and, probably, bone implants in general.
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Affiliation(s)
- Igor L Kitagawa
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil.,Science and Technology of São Paulo, IFSP Federal Institute of Education, Campus Birigui, Birigui, São Paulo 16201-407, Brazil
| | - Celina M Miyazaki
- CCTS, Federal University of São Carlos, Sorocaba, São Paulo 18052-780, Brazil
| | - Letícia Pitol-Palin
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Roberta Okamoto
- Araçatuba Dental School, Department of Basic Science, UNESP São Paulo State University, Araçatuba 16018-805, Brazil
| | - Luana M R de Vasconcellos
- Institute of Science and Technology, Department of Biosciences and Oral Diagnosis, UNESP São Paulo State University, São José dos Campos, São Paulo 12245-000, Brazil
| | - Carlos J L Constantino
- School of Technology and Applied Sciences, Department of Physics, UNESP São Paulo State University, Presidente Prudente, São Paulo 19060-900, Brazil
| | - Paulo N Lisboa-Filho
- School of Sciences, Department of Physics, UNESP São Paulo State University, Bauru, São Paulo 17033-360, Brazil
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Li X, Wang H, Shi Q, Liu J, Xin Z, Dong X, Huang Q, Fukuda T. Automated Fabrication of the High-Fidelity Cellular Micro-Scaffold Through Proportion-Corrective Control of the Photocuring Process. IEEE Robot Autom Lett 2021. [DOI: 10.1109/lra.2021.3052440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Vannozzi L, Gouveia P, Pingue P, Canale C, Ricotti L. Novel Ultrathin Films Based on a Blend of PEG- b-PCL and PLLA and Doped with ZnO Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2020; 12:21398-21410. [PMID: 32302103 DOI: 10.1021/acsami.0c00154] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this paper, a novel nanofilm type is proposed based on a blend of poly(ethylene glycol)-block-poly(ε-caprolactone) methyl ether (PEG-b-PCL) and poly(l-lactic acid), doped with zinc oxide nanoparticles (ZnO NPs) at different concentrations (0.1, 1, and 10 mg/mL). All nanofilm types were featured by a thickness value of ∼500 nm. Increasing ZnO NP concentrations implied larger roughness values (∼22 nm for the bare nanofilm and ∼67 nm for the films with 10 mg/mL of NPs), larger piezoelectricity (average d33 coefficient for the film up to ∼1.98 pm/V), and elastic modulus: the nanofilms doped with 1 and 10 mg/mL of NPs were much stiffer than the nondoped controls and nanofilms doped with 0.1 mg/mL of NPs. The ZnO NP content was also directly proportional to the material melting point and crystallinity and inversely proportional to the material degradation rate, thus highlighting the stabilization role of ZnO particles. In vitro tests were carried out with cells of the musculoskeletal apparatus (fibroblasts, osteoblasts, chondrocytes, and myoblasts). All cell types showed good adhesion and viability on all substrate formulations. Interestingly, a higher content of ZnO NPs in the matrix demonstrated higher bioactivity, boosting the metabolic activity of fibroblasts, myoblasts, and chondrocytes and enhancing the osteogenic and myogenic differentiation. These findings demonstrated the potential of these nanocomposite matrices for regenerative medicine applications, such as tissue engineering.
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Affiliation(s)
- Lorenzo Vannozzi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertá 33, 56127 Pisa, Italy
- Department of Excellence in Robotics & AI, Scuola Superiore Sant'Anna, Piazza Martiri della Liberta 33, 56127 Pisa, Italy
| | - Pedro Gouveia
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertá 33, 56127 Pisa, Italy
- Tissue Engineering Research Group, Department of Anatomy & Regenerative Medicine, Royal College of Surgeons in Ireland (RCSI), Dublin D02 YN77, Ireland
| | - Pasqualantonio Pingue
- NEST, Scuola Normale Superiore and CNR Istituto Nanoscienze, Piazza San Silvestro 12, 56127 Pisa (PI), Italy
| | - Claudio Canale
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Piazza Martiri della Libertá 33, 56127 Pisa, Italy
- Department of Excellence in Robotics & AI, Scuola Superiore Sant'Anna, Piazza Martiri della Liberta 33, 56127 Pisa, Italy
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Hou Q, Wang X, Ragauskas AJ. Dynamic Self-Assembly of Polyelectrolyte Composite Nanomaterial Film. Polymers (Basel) 2019; 11:E1258. [PMID: 31366006 PMCID: PMC6723539 DOI: 10.3390/polym11081258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 07/06/2019] [Accepted: 07/09/2019] [Indexed: 01/01/2023] Open
Abstract
The aim of this study is not only to investigate the feasibility of using PAH (polyallylamine hydrochloride) and PSS (poly styrene-4-sulfonic acid sodium salt) to prepare a film via a layer by layer self-assembly process entrained with silver nanoparticles, but also to show that the silver nanoparticles crystalline structure can be defined and deposited on the surface of the substrate in the desired alignment structure and manner, which is of great help to research on the LBL method in the cellulose field. The effect of outermost layer variation, assembly layers, and composition of multilayers on the formation of the LBL structure on a nanofibrillated cellulose (NFC)/polyvinyl alcohol (PVA) substrate was investigated. The deposition of PAH and PSS was monitored by Fourier-transform infrared spectroscopy (FT-IR). The morphology of the LBL film layers was observed by scanning electron microscope (SEM) and atomic force microscope (AFM). Furthermore, thermal degradation properties were investigated by thermogravimetric analysis (TGA), and physical properties of multilayer films were tested by a universal mechanical tester. The results reveal that PAH and PSS can be readily deposited on a NFC/PVA substrate by using LBL methodology to prepare self-assembled polyelectrolyte multilayer films. The surface morphology of the LBL composite changed from negative to positive charged depending on the final LBL treatment. Also, according to SEM and AFM analysis, silver nanoparticles were well dispersed in the (PAH/PSS) film, which significantly improved the thermal stability of the composite films.
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Affiliation(s)
- Qiupeng Hou
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Xiwen Wang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Arthur J Ragauskas
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, USA
- Department of Forestry, Wildlife and Fisheries, Center for Renewable Carbon University of Tennessee, Institute of Agriculture, Knoxville, TN 37996, USA
- Joint Institute for Biological Sciences, Biosciences Division, Oak Ridge National Laboratory (ORNL), Knoxville, TN 37831, USA
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7
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Layer-by-layer assembly as a robust method to construct extracellular matrix mimic surfaces to modulate cell behavior. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.02.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Ribeiro S, Gomes AC, Etxebarria I, Lanceros-Méndez S, Ribeiro C. Electroactive biomaterial surface engineering effects on muscle cells differentiation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 92:868-874. [PMID: 30184816 DOI: 10.1016/j.msec.2018.07.044] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 06/27/2018] [Accepted: 07/18/2018] [Indexed: 01/15/2023]
Abstract
Even though skeletal muscle cells can naturally regenerate as a response to insignificant tissue damages, more severe injuries can cause irreversible loss of muscle cells mass and/or function. Until now, cell therapies are not a good approach to treat those injuries. Biomaterials such as poly(vinylidene fluoride), PVDF, can improve muscle regeneration by presenting physical cues to muscle cells that mimic the natural regeneration environment. In this way, the ferroelectric and piezoelectric properties of PVDF offer new opportunities for skeletal muscle tissue engineering once the piezoelectricity is an electromechanical effect that can be used to provide electrical signals to the cells, upon mechanical solicitations, similar to the ones found in several body tissues. Thus, previous to dynamic experiments, it is important to determine how the surface properties of the material, both in terms of the poling state (positive or negative net surface charge) and of the morphology (films or fibers) influence myoblast differentiation. It was observed that PVDF promotes myogenic differentiation of C2C12 cells as evidenced by quantitative analysis of myotube fusion, maturation index, length, diameter and number. Charged surfaces improve the fusion of muscle cells into differentiated myotubes, as demonstrated by fusion and maturation index values higher than the control samples. Finally, the use of random and oriented β-PVDF electrospun fibers scaffolds has revealed differences in cell morphology. Contrary to the randomly oriented fibers, oriented PVDF electrospun fibers have promoted the alignment of the cells. It is thus demonstrated that the use of this electroactive polymer represents a suitable approach for the development of electroactive microenvironments for effective muscle tissue engineering.
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Affiliation(s)
- S Ribeiro
- Centro de Física, Universidade do Minho, 4710-057 Braga, Portugal; Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - A C Gomes
- Centre of Molecular and Environmental Biology (CBMA), Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - I Etxebarria
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain
| | - S Lanceros-Méndez
- BCMaterials, Basque Centre for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain; IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
| | - C Ribeiro
- Centro de Física, Universidade do Minho, 4710-057 Braga, Portugal; CEB - Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal.
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Rubio Ayala M, Syrovets T, Hafner S, Zablotskii V, Dejneka A, Simmet T. Spatiotemporal magnetic fields enhance cytosolic Ca 2+ levels and induce actin polymerization via activation of voltage-gated sodium channels in skeletal muscle cells. Biomaterials 2018; 163:174-184. [PMID: 29471128 DOI: 10.1016/j.biomaterials.2018.02.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2017] [Revised: 01/27/2018] [Accepted: 02/13/2018] [Indexed: 12/13/2022]
Abstract
Cellular function is modulated by the electric membrane potential controlling intracellular physiology and signal propagation from a motor neuron to a muscle fiber resulting in muscle contraction. Unlike electric fields, magnetic fields are not attenuated by biological materials and penetrate deep into the tissue. We used complex spatiotemporal magnetic fields (17-70 mT) to control intracellular signaling in skeletal muscle cells. By changing different parameters of the alternating magnetic field (amplitude, inversion time, rotation frequency), we induced transient depolarization of cellular membranes leading to i) Na+ influx through voltage-gated sodium channels (VGSC), ii) cytosolic calcium increase, and iii) VGSC- and ryanodine receptor-dependent increase of actin polymerization. The ion fluxes occurred only, when the field was applied and returned to baseline after the field was turned off. The 30-s-activation-cycle could be repeated without any loss of signal intensity. By contrast, static magnetic fields of the same strength exhibited no effect on myotube Ca2+ levels. Mathematical modeling suggested a role for the alternating magnetic field-induced eddy current, which mediates a local change in the membrane potential triggering the activation of VGSC. These findings might pave the way for the use of complex magnetic fields to improve function of skeletal muscles in myopathies.
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Affiliation(s)
- Mónica Rubio Ayala
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, Ulm, 89081, Germany
| | - Tatiana Syrovets
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, Ulm, 89081, Germany
| | - Susanne Hafner
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, Ulm, 89081, Germany
| | - Vitalii Zablotskii
- Institute of Physics Academy of Sciences of the Czech Republic, Prague 8, Czech Republic
| | - Alexandr Dejneka
- Institute of Physics Academy of Sciences of the Czech Republic, Prague 8, Czech Republic
| | - Thomas Simmet
- Institute of Pharmacology of Natural Products & Clinical Pharmacology, Ulm University, Ulm, 89081, Germany.
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Salgarella AR, Cafarelli A, Ricotti L, Capineri L, Dario P, Menciassi A. Optimal Ultrasound Exposure Conditions for Maximizing C2C12 Muscle Cell Proliferation and Differentiation. ULTRASOUND IN MEDICINE & BIOLOGY 2017; 43:1452-1465. [PMID: 28433437 DOI: 10.1016/j.ultrasmedbio.2017.03.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 02/27/2017] [Accepted: 03/06/2017] [Indexed: 05/07/2023]
Abstract
Described here is an in vitro systematic investigation of the effects on C2C12 myoblasts of exposure to finely controlled and repeatable low-intensity pulsed ultrasound of different frequencies (500 kHz, 1 MHz, 3 MHz and 5 MHz) and different intensities (250, 500 and 1000 mW/cm2). An in-house stimulation system and an ultrasound-transparent cell culture well minimized reflections and attenuations, allowing precise control of ultrasound delivery. Results indicated that a 3 MHz stimulation at 1 W/cm2 intensity maximized cell proliferation in comparison with the other exposure conditions and untreated controls. In contrast, cell differentiation and the consequent formation of multinucleated myotubes were maximized by 1 MHz stimulation at 500 mW/cm2 intensity. The highly controlled exposure conditions employed allowed precise correlation of the ultrasound delivery to the bio-effects produced, thus overcoming the inconsistency of some results available in the literature and contributing to the potential of ultrasound treatment for muscle therapy and regeneration.
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Affiliation(s)
| | - Andrea Cafarelli
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera (Pisa), Italy
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera (Pisa), Italy
| | - Lorenzo Capineri
- Department of Information Engineering, University of Florence, Florence, Italy
| | - Paolo Dario
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera (Pisa), Italy
| | - Arianna Menciassi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera (Pisa), Italy
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Liu X, Han F, Zhao P, Lin C, Wen X, Ye X. Layer-by-layer self-assembled multilayers on PEEK implants improve osseointegration in an osteoporosis rabbit model. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2017; 13:1423-1433. [PMID: 28131883 DOI: 10.1016/j.nano.2017.01.011] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 10/28/2016] [Accepted: 01/04/2017] [Indexed: 10/20/2022]
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Ricotti L, Fujie T. Thin polymeric films for building biohybrid microrobots. BIOINSPIRATION & BIOMIMETICS 2017; 12:021001. [PMID: 28263945 DOI: 10.1088/1748-3190/aa5e5f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This paper aims to describe the disruptive potential that polymeric thin films have in the field of biohybrid devices and to review the recent efforts in this area. Thin (thickness < 1 mm) and ultra-thin (thickness < 1 µm) matrices possess a series of intriguing features, such as large surface area/volume ratio, high flexibility, chemical and physical surface tailorability, etc. This enables the fabrication of advanced bio/non-bio interfaces able to efficiently drive cell-material interactions, which are the key for optimizing biohybrid device performances. Thin films can thus represent suitable platforms on which living and artificial elements are coupled, with the aim of exploiting the unique features of living cells/tissues. This may allow to carry out certain tasks, not achievable with fully artificial technologies. In the paper, after a description of the desirable chemical/physical cues to be targeted and of the fabrication, functionalization and characterization procedures to be used for thin and ultra-thin films, the state-of-the-art of biohybrid microrobots based on micro/nano-membranes are described and discussed. The research efforts in this field are rather recent and they focus on: (1) self-beating cells (such as cardiomyocytes) able to induce a relatively large deformation of the underlying substrates, but affected by a limited controllability by external users; (2) skeletal muscle cells, more difficult to engineer in mature and functional contractile tissues, but featured by a higher controllability. In this context, the different materials used and the performances achieved are analyzed. Despite recent interesting advancements and signs of maturity of this research field, important scientific and technological steps are still needed. In the paper some possible future perspectives are described, mainly concerning thin film manipulation and assembly in multilayer 3D systems, new advanced materials to be used for the fabrication of thin films, cell engineering opportunities and modelling/computational efforts.
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Affiliation(s)
- Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025 Pontedera (Pisa), Italy
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Auh QSC, Park KR, Lee MO, Hwang MJ, Kang SK, Hong JP, Yun HM, Kim EC. N-methyl-D-aspartate (NMDA) impairs myogenesis in C2C12 cells. Muscle Nerve 2016; 56:510-518. [PMID: 27977864 DOI: 10.1002/mus.25511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/07/2016] [Accepted: 12/07/2016] [Indexed: 11/08/2022]
Abstract
INTRODUCTION N-methyl-d-aspartate (NMDA) is expressed in sensory neurons and plays important roles in peripheral pain mechanisms. The aim of this study was to examine the effects and molecular mechanisms of NMDA on C2C12 myoblast proliferation and differentiation. METHODS Cytotoxicity and differentiation were examined by the MTT assay, reverse transcription-polymerase chain reaction, and immunofluorescence. RESULTS NMDA had no cytotoxicity (10-500 μM) and inhibited myoblastic differentiation of C2C12 cells, as assessed by F-actin immunofluorescence and levels of mRNAs encoding myogenic markers such as myogenin and myosin heavy-chain 2. It inhibited phosphorylation of mammalian target of rapamycin (mTOR) by inactivating mitogen-activated protein kinases (MAPKs), including extracellular signal-regulated kinase, c-Jun N-terminal kinase, and p38. It induced reactive oxygen species production. Furthermore, NMDA-suppressed expression of F-actin was reversed by adding the antioxidant N-acetylcysteine. CONCLUSIONS Collectively, these results indicate that NMDA impairs myogenesis or myogenic differentiation in C2C12 cells through the mTOR/MAPK signaling pathways and may lead to skeletal muscle degeneration. Muscle Nerve 56: 510-518, 2017.
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Affiliation(s)
- Q-SChick Auh
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Kyung-Ran Park
- Department of Oral and Maxillofacial Pathology, MRC, School of Dentistry, Kyung Hee University, 1 Heogi-dong, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Myeong-Ok Lee
- Department of Dentistry, Graduate School, Kyung Hee University, Seoul, Korea
| | - Mi-Jin Hwang
- Department of Dentistry, Graduate School, Kyung Hee University, Seoul, Korea
| | - Soo-Kyung Kang
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Jung-Pyo Hong
- Department of Oral Medicine, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Hyung-Mun Yun
- Department of Oral and Maxillofacial Pathology, MRC, School of Dentistry, Kyung Hee University, 1 Heogi-dong, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
| | - Eun-Cheol Kim
- Department of Oral and Maxillofacial Pathology, MRC, School of Dentistry, Kyung Hee University, 1 Heogi-dong, Dongdaemun-gu, Seoul, 130-701, Republic of Korea
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14
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Pensabene V, Costa L, Terekhov A, Gnecco JS, Wikswo J, Hofmeister W. Ultrathin Polymer Membranes with Patterned, Micrometric Pores for Organs-on-Chips. ACS APPLIED MATERIALS & INTERFACES 2016; 8:22629-36. [PMID: 27513606 PMCID: PMC5131702 DOI: 10.1021/acsami.6b05754] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The basal lamina or basement membrane (BM) is a key physiological system that participates in physicochemical signaling between tissue types. Its formation and function are essential in tissue maintenance, growth, angiogenesis, disease progression, and immunology. In vitro models of the BM (e.g., Boyden and transwell chambers) are common in cell biology and lab-on-a-chip devices where cells require apical and basolateral polarization. Extravasation, intravasation, membrane transport of chemokines, cytokines, chemotaxis of cells, and other key functions are routinely studied in these models. The goal of the present study was to integrate a semipermeable ultrathin polymer membrane with precisely positioned pores of 2 μm diameter in a microfluidic device with apical and basolateral chambers. We selected poly(l-lactic acid) (PLLA), a transparent biocompatible polymer, to prepare the semipermeable ultrathin membranes. The pores were generated by pattern transfer using a three-step method coupling femtosecond laser machining, polymer replication, and spin coating. Each step of the fabrication process was characterized by scanning electron microscopy to investigate reliability of the process and fidelity of pattern transfer. In order to evaluate the compatibility of the fabrication method with organs-on-a-chip technology, porous PLLA membranes were embedded in polydimethylsiloxane (PDMS) microfluidic devices and used to grow human umbilical vein endothelial cells (HUVECS) on top of the membrane with perfusion through the basolateral chamber. Viability of cells, optical transparency of membranes and strong adhesion of PLLA to PDMS were observed, thus confirming the suitability of the prepared membranes for use in organs-on-a-chip devices.
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Affiliation(s)
- Virginia Pensabene
- Department of Biomedical Engineering; Vanderbilt University, Nashville, TN 37235 USA
- School of Electronic and Electrical Engineering, University of Leeds, Leeds, LS2 9JT, UK
- School of Medicine, Leeds Institute of Biomedical and Clinical Sciences, University of Leeds, Leeds, LS9 7TF, UK
| | - Lino Costa
- Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, TN 37388 USA
| | - Alexander Terekhov
- Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, TN 37388 USA
| | - Juan S. Gnecco
- Department of Cellular and Molecular Pathology, Vanderbilt University, Nashville, TN 37235 USA
| | - John Wikswo
- Department of Biomedical Engineering; Vanderbilt University, Nashville, TN 37235 USA
- Vanderbilt Institute for Integrative Biosystems Research and Education; Vanderbilt University, Nashville, TN 37235 USA
- Department of Physics and Astronomy; Vanderbilt University, Nashville, TN 37235 USA
- Department of Molecular Physiology and Biophysics; Vanderbilt University, Nashville, TN 37235 USA
| | - William Hofmeister
- Center for Laser Applications, University of Tennessee Space Institute, Tullahoma, TN 37388 USA
- Vanderbilt Institute for Integrative Biosystems Research and Education; Vanderbilt University, Nashville, TN 37235 USA
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Murray LM, Nock V, Evans JJ, Alkaisi MM. The use of substrate materials and topography to modify growth patterns and rates of differentiation of muscle cells. J Biomed Mater Res A 2016; 104:1638-45. [DOI: 10.1002/jbm.a.35696] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 02/16/2016] [Accepted: 02/19/2016] [Indexed: 11/10/2022]
Affiliation(s)
- L. M. Murray
- The MacDiarmid Institute for Advanced Materials and Nanotechnology; Department of Electrical and Computer Engineering; University of Canterbury; Christchurch 8140 New Zealand
| | - V. Nock
- The MacDiarmid Institute for Advanced Materials and Nanotechnology; Department of Electrical and Computer Engineering; University of Canterbury; Christchurch 8140 New Zealand
| | - J. J. Evans
- The MacDiarmid Institute for Advanced Materials and Nanotechnology and Centre for Neuroendocrinology; Department of Obstetrics and Gynaecology; University of Otago Christchurch; Christchurch 8011 New Zealand
| | - M. M. Alkaisi
- The MacDiarmid Institute for Advanced Materials and Nanotechnology; Department of Electrical and Computer Engineering; University of Canterbury; Christchurch 8140 New Zealand
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Junthip J, Tabary N, Chai F, Leclercq L, Maton M, Cazaux F, Neut C, Paccou L, Guinet Y, Staelens JN, Bria M, Landy D, Hédoux A, Blanchemain N, Martel B. Layer-by-layer coating of textile with two oppositely charged cyclodextrin polyelectrolytes for extended drug delivery. J Biomed Mater Res A 2016; 104:1408-24. [DOI: 10.1002/jbm.a.35674] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 01/25/2016] [Accepted: 01/29/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Jatupol Junthip
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Nicolas Tabary
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Feng Chai
- INSERM U1008, Controlled Drug Delivery Systems and Biomaterials; Lille France
| | - Laurent Leclercq
- Université De Montpellier, Institut Des Biomolécules Max Mousseron (IBMM), UMR CNRS 5247; Montpellier France
| | - Mickael Maton
- INSERM U1008, Controlled Drug Delivery Systems and Biomaterials; Lille France
| | - Frederic Cazaux
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Christel Neut
- Inserm U995-Team 1, Faculté Des Sciences Pharmaceutiques Et Biologiques; Lille France
| | - Laurent Paccou
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Yannick Guinet
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Jean-Noel Staelens
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Marc Bria
- Université Lille 1, Centre Commun De Mesures RMN; Villeneuve D'ascq France
| | - David Landy
- Université Du Littoral Côte D'opale, UCEIV; Dunkerque France
| | - Alain Hédoux
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
| | - Nicolas Blanchemain
- INSERM U1008, Controlled Drug Delivery Systems and Biomaterials; Lille France
| | - Bernard Martel
- Université Lille 1, Unité Matériaux Et Transformations (UMET) UMR CNRS 8207; Villeneuve D'ascq France
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Bhuyan MK, Rodriguez-Devora J, Tseng TLB, Boland T. Photovoltaic surfaces enable clonal myoblastic cell release using visible light as external stimulation. Biotechnol J 2016; 11:393-8. [PMID: 26710125 DOI: 10.1002/biot.201500126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 07/23/2015] [Accepted: 12/21/2015] [Indexed: 11/11/2022]
Abstract
Many new biomedical approaches to treating disease require the supply of cells delivered to an injured or diseased organ either individually, collectively as aggregates or sheets, or encapsulated with a scaffold. The collection of cells is accomplished by using enzymatic digestion witch suffer from the need to remove the enzymes after digestion. In addition, enzymatic methods are not applicable for all cells, cell aggregates, cell sheets or 3D structures. The objective of this study was to investigate the release of cultured cells from silicon based Photovoltaic (PV) surfaces using a light source as external stimulation. C2C12 myoblasts were cultured on the negative surface of a PV device and upon confluence they were exposed to light. The amount of released cells was quantified as a function light exposure. It was found that light exposure at 25,000 lux for one hour caused equivalent cell release from the PV surface than trypsination. The released cells are viable and can be re-cultured if needed. This mechanism may offer an alternative method to release excitable cells without using an enzymatic agent. This may be important for cell therapy if larger cell structures such as sheets need to be collected.
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Affiliation(s)
| | | | - Tzu-Liang Bill Tseng
- Industrial, Manufacturing & Systems Engineering, The University of Texas at El Paso, El Paso, TX, USA
| | - Thomas Boland
- Biomedical Engineering, The University of Texas at El Paso, El Paso, TX, USA.
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Vannozzi L, Ricotti L, Filippeschi C, Sartini S, Coviello V, Piazza V, Pingue P, La Motta C, Dario P, Menciassi A. Nanostructured ultra-thin patches for ultrasound-modulated delivery of anti-restenotic drug. Int J Nanomedicine 2015; 11:69-91. [PMID: 26730191 PMCID: PMC4694686 DOI: 10.2147/ijn.s92031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
This work aims to demonstrate the possibility to fabricate ultra-thin polymeric films loaded with an anti-restenotic drug and capable of tunable drug release kinetics for the local treatment of restenosis. Vascular nanopatches are composed of a poly(lactic acid) supporting membrane (thickness: ~250 nm) on which 20 polyelectrolyte bilayers (overall thickness: ~70 nm) are alternatively deposited. The anti-restenotic drug is embedded in the middle of the polyelectrolyte structure, and released by diffusion mechanisms. Nanofilm fabrication procedure and detailed morphological characterization are reported here. Barium titanate nanoparticles (showing piezoelectric properties) are included in the polymeric support and their role is investigated in terms of influence on nanofilm morphology, drug release kinetics, and cell response. Results show an efficient drug release from the polyelectrolyte structure in phosphate-buffered saline, and a clear antiproliferative effect on human smooth muscle cells, which are responsible for restenosis. In addition, preliminary evidences of ultrasound-mediated modulation of drug release kinetics are reported, thus evaluating the influence of barium titanate nanoparticles on the release mechanism. Such data were integrated with quantitative piezoelectric and thermal measurements. These results open new avenues for a fine control of local therapies based on smart responsive materials.
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Affiliation(s)
- Lorenzo Vannozzi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Carlo Filippeschi
- Center for MicroBioRobotics at SSSA, Istituto Italiano di Tecnologia, Pontedera, Italy
| | | | - Vito Coviello
- Department of Pharmacy, University of Pisa, Pisa, Italy
| | - Vincenzo Piazza
- Center for Nanotechnology Innovation at NEST, Istituto Italiano di Tecnologia, Pisa, Italy
| | | | | | - Paolo Dario
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
| | - Arianna Menciassi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Pontedera, Italy
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Al-Dabbagh S, McPhee JS, Murgatroyd C, Butler-Browne G, Stewart CE, Al-Shanti N. The lymphocyte secretome from young adults enhances skeletal muscle proliferation and migration, but effects are attenuated in the secretome of older adults. Physiol Rep 2015; 3:3/11/e12518. [PMID: 26603449 PMCID: PMC4673618 DOI: 10.14814/phy2.12518] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 07/20/2015] [Indexed: 01/07/2023] Open
Abstract
Older people experience skeletal muscle wasting, in part due to impaired proliferative capacity of quiescent skeletal muscle satellite cells which can be reversed by exposure to young blood. To investigate the role of immune cells in muscle regeneration, we isolated lymphocytes from whole blood of young and older healthy volunteers and cultured them with, or without, anti-CD3/CD28 activators to induce release of cytokines, interleukins, and growth factors into the media. The secreted proteins were collected to prepare a conditioned media, which was subsequently used to culture C2C12 myoblasts. The conditioned media from the activated young lymphocytes increased the rate of proliferation of myoblasts by around threefold (P < 0.005) and caused an approximate fourfold (P < 0.005) increase in migration compared with nonactivated lymphocyte control media. These responses were characterized by minimal myotube formation (2%), low fusion index (5%), low myosin heavy chain content, and substantial migration. In contrast, myoblasts treated with conditioned media from activated old lymphocytes exhibited a high degree of differentiation, and multi-nucleated myotube formation that was comparable to control conditions, thus showing no effect on proliferation or migration of myoblasts. These results indicate that secreted proteins from lymphocytes of young people enhance the muscle cell proliferation and migration, whereas secreted proteins from lymphocytes of older people may contribute to the attenuated skeletal muscle satellite cell proliferation and migration.
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Affiliation(s)
- Sarah Al-Dabbagh
- Healthcare Science Research Centre, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Jamie S McPhee
- Healthcare Science Research Centre, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Christopher Murgatroyd
- Healthcare Science Research Centre, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
| | - Gillian Butler-Browne
- Myology Center of Research, UM76 - UPMC Sorbonne Universités/U974 - Inserm/FRE3617 - CNRS/AIM, Paris Cedex 13, France
| | - Claire E Stewart
- Research Institute for Sport & Exercise Sciences, School of Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK
| | - Nasser Al-Shanti
- Healthcare Science Research Centre, Faculty of Science and Engineering, Manchester Metropolitan University, Manchester, UK
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20
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Chitosan surface modification of fully interconnected 3D porous poly(ε-caprolactone) by the LbL approach. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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21
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Pauthe E, Van Tassel PR. Layer-by-layer films as biomaterials: bioactivity and mechanics. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2014; 25:1489-501. [DOI: 10.1080/09205063.2014.921096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Silicon substrate as a novel cell culture device for myoblast cells. J Biomed Sci 2014; 21:47. [PMID: 24885347 PMCID: PMC4035859 DOI: 10.1186/1423-0127-21-47] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 05/05/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Tissue and organ regeneration via transplantation of cell bodies in-situ has become an interesting strategy in regenerative medicine. Developments of cell carriers to systematically deliver cell bodies in the damage site have fall shorten on effectively meet this purpose due to inappropriate release control. Thus, there is still need of novel substrate to achieve targeted cell delivery with appropriate vehicles. In the present study, silicon based photovoltaic (PV) devices are used as a cell culturing substrate for the expansion of myoblast mouse cell (C2C12 cells) that offers an atmosphere for regular cell growth in vitro. The adherence, viability and proliferation of the cells on the silicon surface were examined by direct cell counting and fluorescence microscopy. RESULTS It was found that on the silicon surface, cells proliferated over 7 days showing normal morphology, and expressed their biological activities. Cell culture on silicon substrate reveals their attachment and proliferation over the surface of the PV device. After first day of culture, cell viability was 88% and cell survival remained above 86% as compared to the seeding day after the seventh day. Furthermore, the DAPI staining revealed that the initially scattered cells were able to eventually build a cellular monolayer on top of the silicon substrate. CONCLUSIONS This study explored the biological applications of silicon based PV devices, demonstrating its biocompatibility properties and found useful for culture of cells on porous 2-D surface. The incorporation of silicon substrate has been efficaciously revealed as a potential cell carrier or vehicle in cell growth technology, allowing for their use in cell based gene therapy, tissue engineering, and therapeutic angiogenesis.
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Greco F, Fujie T, Ricotti L, Taccola S, Mazzolai B, Mattoli V. Microwrinkled conducting polymer interface for anisotropic multicellular alignment. ACS APPLIED MATERIALS & INTERFACES 2013; 5:573-584. [PMID: 23273113 DOI: 10.1021/am301908w] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surfaces with controlled micro and nanoscale topographical cues are useful as smart scaffolds and biointerfaces for cell culture. Recently, use of thin-film and surface wrinkling is emerging as a rapid unconventional method for preparing topographically patterned surfaces, especially suited for the production of smart patterns over large area surfaces. On the other hand, there is an increasing interest in employing conducting polymers as soft, biocompatible, conductive biointerfaces or as parts of bioelectronic devices. A novel convenient and versatile method is presented for producing anisotropic topographical cues at the micro- and nanoscale on conducting polymer surfaces. Micro and nanowrinkles were formed during the heat-shrinking process of a thermo-retractable polystyrene substrate. Surface wrinkling was due to the mismatch between the mechanical properties of a conducting polymer ultrathin film and the substrate. Various geometries of wrinkled structures were prepared, demonstrating the tunability of topography depending on the thickness of the conductive film. A method for patterning the conductive properties of the wrinkled substrates was also presented. Such surfaces acted as smart scaffolds for the functional alignment of cells, envisioning their electrical stimulation. Cell adhesion and proliferation were evaluated, comparing different topographies, and a preferential anisotropic alignment of C2C12 murine skeletal muscle cells along wrinkles was demonstrated. The observed trends were also confirmed concerning the formation of aligned myotubes in C2C12 differentiation stage. Furthermore, improved results in terms of aligned and mature myotube formation were obtained by co-culturing C2C12 cells with a fibroblasts feeder layer. The combination of living cells and tunable conductive nanowrinkles will represent a unique tool for the development of innovative biomedical devices.
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Affiliation(s)
- Francesco Greco
- Center for MicroBioRobotics @SSSA, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy.
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Martins PM, Ribeiro S, Ribeiro C, Sencadas V, Gomes AC, Gama FM, Lanceros-Méndez S. Effect of poling state and morphology of piezoelectric poly(vinylidene fluoride) membranes for skeletal muscle tissue engineering. RSC Adv 2013. [DOI: 10.1039/c3ra43499k] [Citation(s) in RCA: 110] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Goljanek-Whysall K, Pais H, Rathjen T, Sweetman D, Dalmay T, Münsterberg A. Regulation of multiple target genes by miR-1 and miR-206 is pivotal for C2C12 myoblast differentiation. J Cell Sci 2012; 125:3590-600. [PMID: 22595520 DOI: 10.1242/jcs.101758] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
MicroRNAs are short non-coding RNAs involved in post-transcriptional regulation of multiple messenger RNA targets. The miR-1/miR-206 family is expressed during skeletal muscle differentiation and is an integral component of myogenesis. To better understand miR-1/miR-206 function during myoblast differentiation we identified novel target mRNAs by microarray and characterized their function in C2C12 myoblasts. Candidate targets from the screen were experimentally validated together with target genes that were predicted by three different algorithms. Some targets characterised have a known function in skeletal muscle development and/or differentiation and include Meox2, RARB, Fzd7, MAP4K3, CLCN3 and NFAT5, others are potentially novel regulators of myogenesis, such as the chromatin remodelling factors Smarcd2 and Smarcb1 or the anti-apoptotic protein SH3BGRL3. The expression profiles of confirmed target genes were examined during C2C12 cell myogenesis. We found that inhibition of endogenous miR-1 and miR-206 by antimiRs blocked the downregulation of most targets in differentiating cells, thus indicating that microRNA activity and target interaction is required for muscle differentiation. Finally, we show that sustained expression of validated miR-1 and/or miR-206 targets resulted in increased proliferation and inhibition of C2C12 cell myogenesis. In many cases the expression of genes related to non-muscle cell fates, such as chondrogenesis, was activated. This indicates that the concerted downregulation of multiple microRNA targets is not only crucial to the skeletal muscle differentiation program but also serves to prevent alternative cell fate choices.
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Affiliation(s)
- Katarzyna Goljanek-Whysall
- Cell and Developmental Biology, School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK
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Zeng Y, von Klitzing R. Oscillatory forces of nanoparticle suspensions confined between rough surfaces modified with polyelectrolytes via the layer-by-layer technique. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6313-6321. [PMID: 22420681 DOI: 10.1021/la2049822] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper addresses the systematic study of surface roughness effects on the internal structuring of silica nanoparticle suspensions under confinement. The confining surfaces are modified by physisorption of layers of oppositely charged polyelectrolytes with the so-called layer-by-layer technique. The layer-by-layer technique modifies the surface roughness without changing the surface potential of a multilayer with the same outermost layer, by increasing the number of constituent layers and ionic strength of the polyelectrolyte solutions and by selecting an appropriate pair of polyelectrolytes. The oscillatory forces of nanoparticle suspensions with a particle diameter of 26 nm are measured by a colloidal-probe atomic force microscope (CP-AFM). The characteristic lengths of the oscillatory force, i.e., wavelength, which indicates interparticle distance, and decay length, or particle correlation length, are not affected by the surface roughness. The corresponding reduction in the oscillatory amplitude and the shift in the phase correlate with an increase in surface roughness. Increasing surface roughness further induces a disappearance of the oscillations, and both confining surfaces contribute to the effect of surface roughness on the force reduction. In order to show an oscillatory force, the particles have to show positional correlation over a reasonably long range perpendicular to the surface, and the correlation function should be the same over a larger lateral area. This requires that both the particles and the surfaces have a high degree of order or symmetry; otherwise, the oscillation does not occur. A roughness of a few nanometers on a single surface, which corresponds to about 10% of the nanoparticle diameter, is sufficient to eliminate the oscillatory force.
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Affiliation(s)
- Yan Zeng
- Stranski-Laboratorium für Physikalische und Theoretische Chemie, Institute for Chemistry, Technical University Berlin, 10623 Berlin, Germany
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