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Dutta S, Muraganadan T, Vasudevan M. Evaluation of lamin A/C mechanotransduction under different surface topography in LMNA related muscular dystrophy. Cytoskeleton (Hoboken) 2024. [PMID: 39091017 DOI: 10.1002/cm.21895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 07/01/2024] [Accepted: 07/02/2024] [Indexed: 08/04/2024]
Abstract
Most of the single point mutations of the LMNA gene are associated with distinct muscular dystrophies, marked by heterogenous phenotypes but primarily the loss and symmetric weakness of skeletal muscle tissue. The molecular mechanism and phenotype-genotype relationships in these muscular dystrophies are poorly understood. An effort has been here to delineating the adaptation of mechanical inputs into biological response by mutant cells of lamin A associated muscular dystrophy. In this study, we implement engineered smooth and pattern surfaces of particular young modulus to mimic muscle physiological range. Using fluorescence and atomic force microscopy, we present distinct architecture of the actin filament along with abnormally distorted cell and nuclear shape in mutants, which showed a tendency to deviate from wild type cells. Topographic features of pattern surface antagonize the binding of the cell with it. Correspondingly, from the analysis of genome wide expression data in wild type and mutant cells, we report differential expression of the gene products of the structural components of cell adhesion as well as LINC (linkers of nucleoskeleton and cytoskeleton) protein complexes. This study also reveals mis expressed downstream signaling processes in mutant cells, which could potentially lead to onset of the disease upon the application of engineered materials to substitute the role of conventional cues in instilling cellular behaviors in muscular dystrophies. Collectively, these data support the notion that lamin A is essential for proper cellular mechanotransduction from extracellular environment to the genome and impairment of the muscle cell differentiation in the pathogenic mechanism for lamin A associated muscular dystrophy.
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Affiliation(s)
- Subarna Dutta
- Department of Biochemistry, University of Calcutta, Kolkata, West Bengal, India
- Theomics International Private Limited, Bengaluru, India
| | - T Muraganadan
- CSIR-Indian Institute of Chemical Biology, Kolkata, India
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2
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Mougkogiannis P, Adamatzky A. Thermosensory Spiking Activity of Proteinoid Microspheres Cross-Linked by Actin Filaments. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:12649-12670. [PMID: 38837748 PMCID: PMC11191697 DOI: 10.1021/acs.langmuir.4c01107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 06/07/2024]
Abstract
Actin, found in all eukaryotic cells as globular (G) or filamentous (F) actin, undergoes polymerization, with G-actin units changing shape to become F-actin. Thermal proteins, or proteinoids, are created by heating amino acids (160-200 °C), forming polymeric chains. These proteinoids can swell in an aqueous solution at around 50 °C, producing hollow microspheres filled with a solution, exhibiting voltage spikes. Our research explores the signaling properties of proteinoids, actin filaments, and hybrid networks combining actin and proteinoids. Proteinoids replicate brain excitation dynamics despite lacking specific membranes or ion channels. We investigate enhancing conductivity and spiking by using pure actin, yielding improved coordination in networks compared with individual filaments or proteinoids. Temperature changes (20 short-peptide supramolecular C to 80 °C) regulate conduction states, demonstrating external control over emergent excitability in protobrain systems. Adding actin to proteinoids reduces spike timing variability, providing a more uniform feature distribution. These findings support theoretical models proposing cytoskeletal matrices for functional specification in synthetic protocell brains, promoting stable interaction complexity. The study concludes that life-like signal encoding can emerge spontaneously within biological polymer scaffolds, incorporating abiotic chemistry.
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Affiliation(s)
| | - Andrew Adamatzky
- Unconventional Computing
Laboratory, UWE Bristol, Bristol BS16 1QY, U.K.
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3
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Mayer I, Karimian T, Gordiyenko K, Angelin A, Kumar R, Hirtz M, Mikut R, Reischl M, Stegmaier J, Zhou L, Ma R, Nienhaus GU, Rabe KS, Lanzerstorfer P, Domínguez CM, Niemeyer CM. Surface-Patterned DNA Origami Rulers Reveal Nanoscale Distance Dependency of the Epidermal Growth Factor Receptor Activation. NANO LETTERS 2024; 24:1611-1619. [PMID: 38267020 PMCID: PMC10853960 DOI: 10.1021/acs.nanolett.3c04272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/21/2023] [Accepted: 12/22/2023] [Indexed: 01/26/2024]
Abstract
The nanoscale arrangement of ligands can have a major effect on the activation of membrane receptor proteins and thus cellular communication mechanisms. Here we report on the technological development and use of tailored DNA origami-based molecular rulers to fabricate "Multiscale Origami Structures As Interface for Cells" (MOSAIC), to enable the systematic investigation of the effect of the nanoscale spacing of epidermal growth factor (EGF) ligands on the activation of the EGF receptor (EGFR). MOSAIC-based analyses revealed that EGF distances of about 30-40 nm led to the highest response in EGFR activation of adherent MCF7 and Hela cells. Our study emphasizes the significance of DNA-based platforms for the detailed investigation of the molecular mechanisms of cellular signaling cascades.
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Affiliation(s)
- Ivy Mayer
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Tina Karimian
- School
of Engineering, University of Applied Sciences
Upper Austria, 4600 Wels, Austria
| | - Klavdiya Gordiyenko
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Alessandro Angelin
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Ravi Kumar
- Institute
of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Michael Hirtz
- Institute
of Nanotechnology (INT) & Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Ralf Mikut
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Markus Reischl
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Johannes Stegmaier
- Institute
for Automation and Applied Informatics (IAI), Karlsruhe Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
- Institute
of Imaging and Computer Vision, RWTH Aachen
University, 52074 Aachen, Germany
| | - Lu Zhou
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
| | - Rui Ma
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
| | - Gerd Ulrich Nienhaus
- Institute
of Applied Physics (APH), Karlsruhe Institute
of Technology (KIT), 76049 Karlsruhe, Germany
- Institute
of Biological and Chemical Systems (IBCS) and Institute of Nanotechnology
(INT), Karlsruhe Institute of Technology
(KIT), 76021 Karlsruhe, Germany
- Department
of Physics, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Kersten S. Rabe
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Peter Lanzerstorfer
- School
of Engineering, University of Applied Sciences
Upper Austria, 4600 Wels, Austria
| | - Carmen M. Domínguez
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
| | - Christof M. Niemeyer
- Institute
for Biological Interfaces (IBG-1), Karlsruhe
Institute of Technology (KIT), 76344 Eggenstein-Leopoldshafen, Germany
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4
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Nakanishi J, Yamamoto S. Static and photoresponsive dynamic materials to dissect physical regulation of cellular functions. Biomater Sci 2022; 10:6116-6134. [PMID: 36111810 DOI: 10.1039/d2bm00789d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent progress in mechanobiology has highlighted the importance of physical cues, such as mechanics, geometry (size), topography, and porosity, in the determination of cellular activities and fates, in addition to biochemical factors derived from their surroundings. In this review, we will first provide an overview of how such fundamental insights are identified by synchronizing the hierarchical nature of biological systems and static materials with tunable physical cues. Thereafter, we will explain the photoresponsive dynamic biomaterials to dissect the spatiotemporal aspects of the dependence of biological functions on physical cues.
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Affiliation(s)
- Jun Nakanishi
- Research Center for Functional Materials, National Institute for Materials Science, Japan. .,Graduate School of Advanced Science and Engineering, Waseda University, Japan.,Graduate School of Advanced Engineering, Tokyo University of Science, Japan
| | - Shota Yamamoto
- Research Center for Functional Materials, National Institute for Materials Science, Japan. .,Graduate School of Arts and Sciences, The University of Tokyo, Japan
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5
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Mai P, Hampl J, Baca M, Brauer D, Singh S, Weise F, Borowiec J, Schmidt A, Küstner JM, Klett M, Gebinoga M, Schroeder IS, Markert UR, Glahn F, Schumann B, Eckstein D, Schober A. MatriGrid® Based Biological Morphologies: Tools for 3D Cell Culturing. Bioengineering (Basel) 2022; 9:bioengineering9050220. [PMID: 35621498 PMCID: PMC9138054 DOI: 10.3390/bioengineering9050220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/06/2022] [Accepted: 05/11/2022] [Indexed: 02/06/2023] Open
Abstract
Recent trends in 3D cell culturing has placed organotypic tissue models at another level. Now, not only is the microenvironment at the cynosure of this research, but rather, microscopic geometrical parameters are also decisive for mimicking a tissue model. Over the years, technologies such as micromachining, 3D printing, and hydrogels are making the foundation of this field. However, mimicking the topography of a particular tissue-relevant substrate can be achieved relatively simply with so-called template or morphology transfer techniques. Over the last 15 years, in one such research venture, we have been investigating a micro thermoforming technique as a facile tool for generating bioinspired topographies. We call them MatriGrid®s. In this research account, we summarize our learning outcome from this technique in terms of the influence of 3D micro morphologies on different cell cultures that we have tested in our laboratory. An integral part of this research is the evolution of unavoidable aspects such as possible label-free sensing and fluidic automatization. The development in the research field is also documented in this account.
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Affiliation(s)
- Patrick Mai
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Jörg Hampl
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
- Correspondence: (J.H.); (A.S.); Tel.: +49-3677-6933387 (A.S.)
| | - Martin Baca
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Dana Brauer
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Sukhdeep Singh
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Frank Weise
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Justyna Borowiec
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - André Schmidt
- Placenta Lab, Department of Obstetrics, Jena University Hospital, 07747 Jena, Germany; (A.S.); (U.R.M.)
| | - Johanna Merle Küstner
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Maren Klett
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Michael Gebinoga
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
| | - Insa S. Schroeder
- Biophysics Division, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany;
| | - Udo R. Markert
- Placenta Lab, Department of Obstetrics, Jena University Hospital, 07747 Jena, Germany; (A.S.); (U.R.M.)
| | - Felix Glahn
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06097 Halle, Germany; (F.G.); (B.S.); (D.E.)
| | - Berit Schumann
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06097 Halle, Germany; (F.G.); (B.S.); (D.E.)
| | - Diana Eckstein
- Institute of Environmental Toxicology, Martin-Luther-University Halle-Wittenberg, 06097 Halle, Germany; (F.G.); (B.S.); (D.E.)
| | - Andreas Schober
- Department of Nano-Biosystems Engineering, Institute of Chemistry and Biotechnology, Ilmenau University of Technology, 98693 Ilmenau, Germany; (P.M.); (M.B.); (D.B.); (S.S.); (F.W.); (J.B.); (J.M.K.); (M.K.); (M.G.)
- Correspondence: (J.H.); (A.S.); Tel.: +49-3677-6933387 (A.S.)
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6
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Electrostatic self-assembly approach in the deposition of bio-functional chitosan-based layers enriched with caffeic acid on Ti-6Al-7Nb alloys by alternate immersion. BIOMATERIALS ADVANCES 2022; 136:212791. [PMID: 35929324 DOI: 10.1016/j.bioadv.2022.212791] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 03/24/2022] [Accepted: 04/01/2022] [Indexed: 11/20/2022]
Abstract
Tailoring surface properties by layer-by-layer (LBL) deposition directed on the construction of complex multilayer coatings with nanoscale precision enables the development of novel structures and devices with desired functional properties (i.e., osseointegration, bactericidal activity, biocorrosion protection). Herein, electrostatic self-assembly was applied to fabricate biopolymer-based coatings involving chitosan (CSM) and alginate (AL) enriched with caffeic acid (CA) on Ti-6Al-7Nb alloyed surfaces. The method of CA grafting onto the chitosan backbone (CA-g-CSM) as well as all used reagents for implant functionalization were chosen as green and sustainable approach. The final procedure of surface modification of the Ti-6Al-7Nb alloy consists of three steps: (i) chemical treatment in Piranha solution, (ii) plasma chemical-activation of the Ti alloy surface in a RF CVD (Radio Frequency Chemical Vapour Deposition) reactor using Ar, O2 and NH3 gaseous precursors, and (iii) a multi-step deposition of bio-functional coatings via dip-coating method. Corrosion tests have revealed that the resulting chitosan-based coatings, also these involving CA, block the specimen surface and hinder corrosion of titanium alloy. Furthermore, the antioxidant layers are characterized by beneficial level of roughness (Ra up ca. 350 nm) and moderate hydrophilicity (59°) with the dispersion part of conducive surface energy ca. 30 mJ/m2. Noteworthy, all coatings are biocompatible as the intact morphology of cultured eukaryotic cells ensured proper growth and proliferation, while exhibit bacteriostatic character, particularly in contact with Gram-(-) bacteria (E. coli). The study indicates that the applied simple sustainable strategy has contributed significantly to obtaining homogeneous, stable, and biocompatible while antibacterial biopolymer-based coatings.
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7
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Shi H, Wu X, Sun S, Wang C, Vangelatos Z, Ash-Shakoor A, Grigoropoulos CP, Mather PT, Henderson JH, Ma Z. Profiling the responsiveness of focal adhesions of human cardiomyocytes to extracellular dynamic nano-topography. Bioact Mater 2022; 10:367-377. [PMID: 34901553 PMCID: PMC8636819 DOI: 10.1016/j.bioactmat.2021.08.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 07/17/2021] [Accepted: 08/25/2021] [Indexed: 01/02/2023] Open
Abstract
Focal adhesion complexes function as the mediators of cell-extracellular matrix interactions to sense and transmit the extracellular signals. Previous studies have demonstrated that cardiomyocyte focal adhesions can be modulated by surface topographic features. However, the response of focal adhesions to dynamic surface topographic changes remains underexplored. To study this dynamic responsiveness of focal adhesions, we utilized a shape memory polymer-based substrate that can produce a flat-to-wrinkle surface transition triggered by an increase of temperature. Using this dynamic culture system, we analyzed three proteins (paxillin, vinculin and zyxin) from different layers of the focal adhesion complex in response to dynamic extracellular topographic change. Hence, we quantified the dynamic profile of cardiomyocyte focal adhesion in a time-dependent manner, which provides new understanding of dynamic cardiac mechanobiology.
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Affiliation(s)
- Huaiyu Shi
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
| | - Xiangjun Wu
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
| | - Shiyang Sun
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
| | - Chenyan Wang
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
| | - Zacharias Vangelatos
- Department of Mechanical Engineering, University of California, Berkeley, PA, 94720, USA
| | - Ariel Ash-Shakoor
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
| | | | - Patrick T. Mather
- Department of Chemical Engineering, Bucknell University, Lewisburg, PA, 17837, USA
| | - James H. Henderson
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
| | - Zhen Ma
- Department of Biomedical & Chemical Engineering, Syracuse University, Syracuse, NY, 13244, USA
- BioInspired Syracuse Institute for Materials and Living Systems, Syracuse University, Syracuse, NY, 13244, USA
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8
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Cecchini A, Cornelison DDW. Eph/Ephrin-Based Protein Complexes: The Importance of cis Interactions in Guiding Cellular Processes. Front Mol Biosci 2022; 8:809364. [PMID: 35096972 PMCID: PMC8793696 DOI: 10.3389/fmolb.2021.809364] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 12/21/2021] [Indexed: 12/13/2022] Open
Abstract
Although intracellular signal transduction is generally represented as a linear process that transmits stimuli from the exterior of a cell to the interior via a transmembrane receptor, interactions with additional membrane-associated proteins are often critical to its success. These molecules play a pivotal role in mediating signaling via the formation of complexes in cis (within the same membrane) with primary effectors, particularly in the context of tumorigenesis. Such secondary effectors may act to promote successful signaling by mediating receptor-ligand binding, recruitment of molecular partners for the formation of multiprotein complexes, or differential signaling outcomes. One signaling family whose contact-mediated activity is frequently modulated by lateral interactions at the cell surface is Eph/ephrin (EphA and EphB receptor tyrosine kinases and their ligands ephrin-As and ephrin-Bs). Through heterotypic interactions in cis, these molecules can promote a diverse range of cellular activities, including some that are mutually exclusive (cell proliferation and cell differentiation, or adhesion and migration). Due to their broad expression in most tissues and their promiscuous binding within and across classes, the cellular response to Eph:ephrin interaction is highly variable between cell types and is dependent on the cellular context in which binding occurs. In this review, we will discuss interactions between molecules in cis at the cell membrane, with emphasis on their role in modulating Eph/ephrin signaling.
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Affiliation(s)
- Alessandra Cecchini
- Division of Biological Sciences, University of Missouri, Columbia, MO, United States
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
| | - D. D. W. Cornelison
- Division of Biological Sciences, University of Missouri, Columbia, MO, United States
- Christopher S. Bond Life Sciences Center, University of Missouri, Columbia, MO, United States
- *Correspondence: D. D. W. Cornelison,
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9
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Clément JP, Al-Alwan L, Glasgow SD, Stolow A, Ding Y, Quevedo Melo T, Khayachi A, Liu Y, Hellmund M, Haag R, Milnerwood AJ, Grütter P, Kennedy TE. Dendritic Polyglycerol Amine: An Enhanced Substrate to Support Long-Term Neural Cell Culture. ASN Neuro 2022; 14:17590914211073276. [PMID: 35023760 PMCID: PMC8784910 DOI: 10.1177/17590914211073276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Long-term stable cell culture is a critical tool to better understand cell function. Most adherent cell culture models require a polymer substrate coating of poly-lysine or poly-ornithine for the cells to adhere and survive. However, polypeptide-based substrates are degraded by proteolysis and it remains a challenge to maintain healthy cell cultures for extended periods of time. Here, we report the development of an enhanced cell culture substrate based on a coating of dendritic polyglycerol amine (dPGA), a non-protein macromolecular biomimetic of poly-lysine, to promote the adhesion and survival of neurons in cell culture. We show that this new polymer coating provides enhanced survival, differentiation and long-term stability for cultures of primary neurons or neurons derived from human induced pluripotent stem cells (hiPSCs). Atomic force microscopy analysis provides evidence that greater nanoscale roughness contributes to the enhanced capacity of dPGA-coated surfaces to support cells in culture. We conclude that dPGA is a cytocompatible, functionally superior, easy to use, low cost and highly stable alternative to poly-cationic polymer cell culture substrate coatings such as poly-lysine and poly-ornithine.
Summary statement
Here, we describe a novel dendritic polyglycerol amine-based substrate coating, demonstrating superior performance compared to current polymer coatings for long-term culture of primary neurons and neurons derived from induced pluripotent stem cells.
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Affiliation(s)
- Jean-Pierre Clément
- Program in Neuroengineering, Montreal Neurological Institute, McGill University, Montreal, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Laila Al-Alwan
- Program in Neuroengineering, Montreal Neurological Institute, McGill University, Montreal, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Stephen D. Glasgow
- Program in Neuroengineering, Montreal Neurological Institute, McGill University, Montreal, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Avya Stolow
- Department of Physics, McGill University, Montreal, Canada
| | - Yi Ding
- Department of Physics, McGill University, Montreal, Canada
| | - Thaiany Quevedo Melo
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Anouar Khayachi
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Yumin Liu
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Markus Hellmund
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry, Freie Universität Berlin, Berlin, Germany
| | - Austen J Milnerwood
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
| | - Peter Grütter
- Department of Physics, McGill University, Montreal, Canada
| | - Timothy E. Kennedy
- Program in Neuroengineering, Montreal Neurological Institute, McGill University, Montreal, Canada
- Department of Neurology and Neurosurgery, Montreal Neurological Institute and Hospital, Montreal, Canada
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10
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Nassereddine A, Abdelrahman A, Benard E, Bedu F, Ozerov I, Limozin L, Sengupta K. Ligand Nanocluster Array Enables Artificial-Intelligence-Based Detection of Hidden Features in T-Cell Architecture. NANO LETTERS 2021; 21:5606-5613. [PMID: 34170136 DOI: 10.1021/acs.nanolett.1c01073] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Protein patterning has emerged as a powerful means to interrogate adhering cells. However, the tools to apply a sub-micrometer periodic stimulus and the analysis of the response are still being standardized. We propose a technique combining electron beam lithography and surface functionalization to fabricate nanopatterns compatible with advanced imaging. The repetitive pattern enables a deep-learning algorithm to reveal that T cells organize their membrane and actin network differently depending upon whether the ligands are clustered or homogeneously distributed, an effect invisible to the unassisted human eye even after extensive image analysis. This fabrication and analysis toolbox should be useful, both together and separately, for exploring general correlation between a spatially structured subcellular stimulation and a subtle cellular response.
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Affiliation(s)
- Aya Nassereddine
- Aix Marseille Univ, CNRS, CINAM, 13009 Marseille, France
- Aix Marseille Univ, CNRS, INSERM, LAI, Turing Centre for Living Systems, 13009 Marseille, France
| | - Ahmed Abdelrahman
- Aix Marseille Univ, CNRS, CINAM, 13009 Marseille, France
- Aix Marseille Univ, CNRS, INSERM, LAI, Turing Centre for Living Systems, 13009 Marseille, France
| | | | - Frederic Bedu
- Aix Marseille Univ, CNRS, CINAM, 13009 Marseille, France
| | - Igor Ozerov
- Aix Marseille Univ, CNRS, CINAM, 13009 Marseille, France
| | - Laurent Limozin
- Aix Marseille Univ, CNRS, INSERM, LAI, Turing Centre for Living Systems, 13009 Marseille, France
| | - Kheya Sengupta
- Aix Marseille Univ, CNRS, CINAM, 13009 Marseille, France
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11
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Gao C, Zhang L, Wang J, Jin M, Tang Q, Chen Z, Cheng Y, Yang R, Zhao G. Electrospun nanofibers promote wound healing: theories, techniques, and perspectives. J Mater Chem B 2021; 9:3106-3130. [PMID: 33885618 DOI: 10.1039/d1tb00067e] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
At present, the clinical strategies for treating chronic wounds are limited, especially when it comes to pain relief and rapid wound healing. Therefore, there is an urgent need to develop alternative treatment methods. This paper provides a systematic review on recent researches on how electrospun nanofiber scaffolds promote wound healing and how the electrospinning technology has been used for fabricating multi-dimensional, multi-pore and multi-functional nanofiber scaffolds that have greatly promoted the development of wound healing dressings. First, we provide a review on the four stages of wound healing, which is followed by a discussion on the evolvement of the electrospinning technology, what is involved in electrospinning devices, and factors affecting the electrospinning process. Finally, we present the possible mechanisms of electrospun nanofibers to promote wound healing, the classification of electrospun polymers, cell infiltration favoring fiber scaffolds, antibacterial fiber scaffolds, and future multi-functional scaffolds. Although nanofiber scaffolds have made great progress as a type of multi-functional biomaterial, major challenges still remain for commercializing them in a way that fully meets the needs of patients.
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Affiliation(s)
- Chen Gao
- College of Life Sciences, Anhui Medical University, Hefei 230022, Anhui, China
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12
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Saffioti NA, Cavalcanti-Adam EA, Pallarola D. Biosensors for Studies on Adhesion-Mediated Cellular Responses to Their Microenvironment. Front Bioeng Biotechnol 2020; 8:597950. [PMID: 33262979 PMCID: PMC7685988 DOI: 10.3389/fbioe.2020.597950] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 10/12/2020] [Indexed: 12/28/2022] Open
Abstract
Cells interact with their microenvironment by constantly sensing mechanical and chemical cues converting them into biochemical signals. These processes allow cells to respond and adapt to changes in their environment, and are crucial for most cellular functions. Understanding the mechanism underlying this complex interplay at the cell-matrix interface is of fundamental value to decipher key biochemical and mechanical factors regulating cell fate. The combination of material science and surface chemistry aided in the creation of controllable environments to study cell mechanosensing and mechanotransduction. Biologically inspired materials tailored with specific bioactive molecules, desired physical properties and tunable topography have emerged as suitable tools to study cell behavior. Among these materials, synthetic cell interfaces with built-in sensing capabilities are highly advantageous to measure biophysical and biochemical interaction between cells and their environment. In this review, we discuss the design of micro and nanostructured biomaterials engineered not only to mimic the structure, properties, and function of the cellular microenvironment, but also to obtain quantitative information on how cells sense and probe specific adhesive cues from the extracellular domain. This type of responsive biointerfaces provides a readout of mechanics, biochemistry, and electrical activity in real time allowing observation of cellular processes with molecular specificity. Specifically designed sensors based on advanced optical and electrochemical readout are discussed. We further provide an insight into the emerging role of multifunctional micro and nanosensors to control and monitor cell functions by means of material design.
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Affiliation(s)
- Nicolás Andrés Saffioti
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín, Argentina
| | | | - Diego Pallarola
- Instituto de Nanosistemas, Universidad Nacional de General San Martín, San Martín, Argentina
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13
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Rahman M, Dutta NK, Roy Choudhury N. Magnesium Alloys With Tunable Interfaces as Bone Implant Materials. Front Bioeng Biotechnol 2020; 8:564. [PMID: 32587850 PMCID: PMC7297987 DOI: 10.3389/fbioe.2020.00564] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 05/11/2020] [Indexed: 12/20/2022] Open
Abstract
Magnesium (Mg) based biodegradable materials are a new generation orthopedic implant materials that are intended to possess same mechanical properties as that of bone. Mg alloys are considered as promising substitutes to permanent implants due to their biodegradability in the physiological environment. However, rapid corrosion rate is one of the major constraints of using Mg alloys in clinical applications in spite of their excellent biocompatibility. Approaches to overcome the limitations include the selection of adequate alloying elements, proper surface treatment, surface modification with coating to control the degradation rate. This review focuses on current advances on surface engineering of Mg based biomaterials for biomedical applications. The review begins with a description of corrosion mechanism of Mg alloy, the requirement for appropriate surface functionalization/coatings, their structure-property-performance relationship, and suitability for biomedical applications. The control of physico-chemical properties such as wettability, surface morphology, surface chemistry, and surface functional groups of the coating tailored by various approaches forms the pivotal part of the review. Chemical surface treatment offers initial protection from corrosion and inorganic coating like hydroxyapatite (HA) improves the biocompatibility of the substrate. Considering the demand of ideal implant materials, multilayer hybrid coatings on Mg alloy in combination with chemical pretreatment or inorganic HA coating, and protein-based polymer coating could be a promising technique to improve corrosion resistance and promote biocompatibility of Mg-based alloys.
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Affiliation(s)
| | | | - Namita Roy Choudhury
- Chemical and Environmental Engineering, School of Engineering, RMIT University, Melbourne, VIC, Australia
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14
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Fey C, Betz J, Rosenbaum C, Kralisch D, Vielreicher M, Friedrich O, Metzger M, Zdzieblo D. Bacterial nanocellulose as novel carrier for intestinal epithelial cells in drug delivery studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110613. [DOI: 10.1016/j.msec.2019.110613] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 12/21/2019] [Accepted: 12/26/2019] [Indexed: 01/14/2023]
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15
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Cabezas MD, Meckes B, Mirkin CA, Mrksich M. Subcellular Control over Focal Adhesion Anisotropy, Independent of Cell Morphology, Dictates Stem Cell Fate. ACS NANO 2019; 13:11144-11152. [PMID: 31532622 PMCID: PMC6924571 DOI: 10.1021/acsnano.9b03937] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Although microscale patterning techniques have been used to control cell morphology and shape, they only provide indirect control over the formation of the subcellular cytoskeletal elements that determine contractility. This paper addresses the hypotheses that nanoscale anisotropic features of a patterned matrix can direct the alignment of internal cytoskeletal actin fibers within a confined shape with an unbiased aspect ratio, and that this enhanced control over cytoskeletal architecture directs programmed cell behaviors. Here, large-area polymer pen lithography is used to pattern substrates with nanoscale extracellular matrix protein features and to identify cues that can be used to direct cytoskeletal organization in human mesenchymal stem cells. This nanopatterning approach is used to identify how anisotropic focal adhesions around the periphery of symmetric patterns yield an organized and contractile actin cytoskeleton. This work reports the important finding that anisotropic cues that increase cell contractility within a circular shape redirect cell differentiation from an adipogenic to an osteogenic fate. Together, these experiments introduce a programmable approach for using subcellular spatial cues to control cell behavior within defined geometries.
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Affiliation(s)
- Maria D. Cabezas
- Department of Chemistry, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
| | - Brian Meckes
- Department of Chemistry, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
| | - Chad A. Mirkin
- Department of Chemistry, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
- Department of Biomedical Engineering Northwestern University, Evanston, Illinois 60208, United States
- Corresponding authors:,
| | - Milan Mrksich
- Department of Chemistry, Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Evanston, Illinois 60208, United States
- Department of Biomedical Engineering Northwestern University, Evanston, Illinois 60208, United States
- Corresponding authors:,
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16
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Zarka R, Horev MB, Volberg T, Neubauer S, Kessler H, Spatz JP, Geiger B. Differential Modulation of Platelet Adhesion and Spreading by Adhesive Ligand Density. NANO LETTERS 2019; 19:1418-1427. [PMID: 30649888 PMCID: PMC6437653 DOI: 10.1021/acs.nanolett.8b03513] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Revised: 01/08/2019] [Indexed: 05/25/2023]
Abstract
Platelets play a major role in hemostasis and thrombosis, by binding to the underlying extracellular matrix around injured blood vessels, via integrin receptors. In this study, we investigated the effects of adhesive ligand spacing on the stability of platelets' adhesion and the mode of their spreading on extracellular surfaces. Toward this end, we have examined the differential adhesion and spreading of human platelets onto nanogold-patterned surfaces, functionalized with the αIIbβ3 integrin ligand, SN528. Combining light- and scanning electron-microscopy, we found that interaction of platelets with surfaces coated with SN528 at spacing of 30-60 nm induces the extension of filopodia through which the platelets stably attach to the nanopatterned surface and spread on it. Increasing the nanopattern-gold spacing to 80-100 nm resulted in a dramatic reduction (>95%) in the number of adhering platelets. Surprisingly, a further increase in ligand spacing to 120 nm resulted in platelet binding to the surface at substantially larger numbers, yet these platelets remained discoid and were essentially devoid of filopodia and lamellipodia. These results indicate that the stimulation of filopodia extension by adhering platelets, and the consequent spreading on these surfaces depend on different ligand densities. Thus, the extension of filopodia occurs on surfaces with a ligand spacing of 100 nm or less, while the sustainability and growth of these initial adhesions and induction of extensive platelet adhesion and spreading requires lower ligand-to-ligand spacing (≤60 nm). The mechanisms underlying this differential ligand-density sensing by platelets, as well as the unexpected retention of discoid platelets on surfaces with even larger spacing (120 nm) are discussed.
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Affiliation(s)
- Revital Zarka
- Department
of Molecular Cell Biology, The Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Melanie B. Horev
- Department
of Molecular Cell Biology, The Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Tova Volberg
- Department
of Molecular Cell Biology, The Weizmann
Institute of Science, Rehovot 76100, Israel
| | - Stefanie Neubauer
- Institute
for Advanced Study (IAS) and Center of Integrated Protein Science,
Department of Chemistry, Technical University
of Munich, 85747 Garching, Germany
| | - Horst Kessler
- Institute
for Advanced Study (IAS) and Center of Integrated Protein Science,
Department of Chemistry, Technical University
of Munich, 85747 Garching, Germany
| | - Joachim P. Spatz
- Department
of Cellular Biophysics, Max Planck Institute
for Medical Research, Jahnstrasse 29, D-69120 Heidelberg, Germany
| | - Benjamin Geiger
- Department
of Molecular Cell Biology, The Weizmann
Institute of Science, Rehovot 76100, Israel
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17
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Robotti F, Bottan S, Fraschetti F, Mallone A, Pellegrini G, Lindenblatt N, Starck C, Falk V, Poulikakos D, Ferrari A. A micron-scale surface topography design reducing cell adhesion to implanted materials. Sci Rep 2018; 8:10887. [PMID: 30022037 PMCID: PMC6052105 DOI: 10.1038/s41598-018-29167-2] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 06/27/2018] [Indexed: 12/21/2022] Open
Abstract
The micron-scale surface topography of implanted materials represents a complementary pathway, independent of the material biochemical properties, regulating the process of biological recognition by cells which mediate the inflammatory response to foreign bodies. Here we explore a rational design of surface modifications in micron range to optimize a topography comprised of a symmetrical array of hexagonal pits interfering with focal adhesion establishment and maturation. When implemented on silicones and hydrogels in vitro, the anti-adhesive topography significantly reduces the adhesion of macrophages and fibroblasts and their activation toward effectors of fibrosis. In addition, long-term interaction of the cells with anti-adhesive topographies markedly hampers cell proliferation, correlating the physical inhibition of adhesion and complete spreading with the natural progress of the cell cycle. This solution for reduction in cell adhesion can be directly integrated on the outer surface of silicone implants, as well as an additive protective conformal microstructured biocellulose layer for materials that cannot be directly microstructured. Moreover, the original geometry imposed during manufacturing of the microstructured biocellulose membranes are fully retained upon in vivo exposure, suggesting a long lasting performance of these topographical features after implantation.
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Affiliation(s)
- Francesco Robotti
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092, Zurich, Switzerland
| | - Simone Bottan
- Wyss Zurich, ETH Zurich/University of Zurich, Zurich, Switzerland
| | - Federica Fraschetti
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, CH-8092, Zurich, Switzerland
| | - Anna Mallone
- Institute for Regenerative Medicine, University of Zurich, Zurich, Switzerland
| | - Giovanni Pellegrini
- Laboratory for Animal Model Pathology, Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Nicole Lindenblatt
- Department of Plastic and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Christoph Starck
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany
| | - Volkmar Falk
- Department of Cardiothoracic and Vascular Surgery, German Heart Institute Berlin, Berlin, Germany
| | - 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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18
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Righi M, Puleo GL, Tonazzini I, Giudetti G, Cecchini M, Micera S. Peptide-based coatings for flexible implantable neural interfaces. Sci Rep 2018; 8:502. [PMID: 29323135 PMCID: PMC5765121 DOI: 10.1038/s41598-017-17877-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 11/29/2017] [Indexed: 11/23/2022] Open
Abstract
In the last decade, the use of flexible biosensors for neuroprosthetic and translational applications has widely increased. Among them, the polyimide (PI)-based thin-film electrodes got a large popularity. However, the usability of these devices is still hampered by a non-optimal tissue-device interface that usually compromises the long-term quality of neural signals. Advanced strategies able to improve the surface properties of these devices have been developed in the recent past. Unfortunately, most of them are not easy to be developed and combined with micro-fabrication processes, and require long-term efforts to be testable with human subjects. Here we show the results of the design and in vitro testing of an easy-to-implement and potentially interesting coating approach for thin-film electrodes. In particular, two biocompatible coatings were obtained via covalent conjugation of a laminin-derived peptide, CAS-IKVAV-S (IKV), with polyimide sheets that we previously functionalized with vinyl- and amino- groups (PI_v and PI_a respectively). Both the engineered coatings (PI_v+IKV and PI_a+IKV) showed morphological and chemical properties able to support neuronal adhesion, neurite sprouting, and peripheral glial cell viability while reducing the fibroblasts contamination of the substrate. In particular, PI_v+IKV showed promising results that encourage further in vivo investigation and pave the way for a new generation of peptide-coated thin-film electrodes.
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Affiliation(s)
- Martina Righi
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025, Pontedera (PI), Italy.
| | - Gian Luigi Puleo
- Istituto Italiano di Tecnologia, Center of Micro-BioRobotics@SSSA, Viale Rinaldo Piaggio 34, 56025, Pontedera (PI), Italy
| | - Ilaria Tonazzini
- NEST (National Enterprise for nanoScience and nanoTechnology), Istituto Nanoscienze-CNR & Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Guido Giudetti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025, Pontedera (PI), Italy
| | - Marco Cecchini
- NEST (National Enterprise for nanoScience and nanoTechnology), Istituto Nanoscienze-CNR & Scuola Normale Superiore, Piazza San Silvestro 12, 56127, Pisa, Italy
| | - Silvestro Micera
- The BioRobotics Institute, Scuola Superiore Sant'Anna, Viale Rinaldo Piaggio 34, 56025, Pontedera (PI), Italy. .,Bertarelli Foundation Chair in NeuroEngineering, Center for Neuroprosthetics and Institute of Bioengineering (IBI)-School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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19
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Damiati L, Eales MG, Nobbs AH, Su B, Tsimbouri PM, Salmeron-Sanchez M, Dalby MJ. Impact of surface topography and coating on osteogenesis and bacterial attachment on titanium implants. J Tissue Eng 2018; 9:2041731418790694. [PMID: 30116518 PMCID: PMC6088466 DOI: 10.1177/2041731418790694] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 07/03/2018] [Indexed: 01/09/2023] Open
Abstract
Titanium (Ti) plays a predominant role as the material of choice in orthopaedic and dental implants. Despite the majority of Ti implants having long-term success, premature failure due to unsuccessful osseointegration leading to aseptic loosening is still too common. Recently, surface topography modification and biological/non-biological coatings have been integrated into orthopaedic/dental implants in order to mimic the surrounding biological environment as well as reduce the inflammation/infection that may occur. In this review, we summarize the impact of various Ti coatings on cell behaviour both in vivo and in vitro. First, we focus on the Ti surface properties and their effects on osteogenesis and then on bacterial adhesion and viability. We conclude from the current literature that surface modification of Ti implants can be generated that offer both osteoinductive and antimicrobial properties.
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Affiliation(s)
- Laila Damiati
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, UK
- Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Marcus G Eales
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Angela H Nobbs
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Bo Su
- Bristol Dental School, University of Bristol, Bristol, UK
| | - Penelope M Tsimbouri
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, UK
- Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
| | - Manuel Salmeron-Sanchez
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, UK
- Division of Biomedical Engineering, School of Engineering, University of Glasgow, Glasgow, UK
| | - Matthew J Dalby
- Centre for the Cellular Microenvironment, University of Glasgow, Glasgow, UK
- Institute of Molecular, Cell and Systems Biology, University of Glasgow, Glasgow, UK
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20
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Abbina S, Siren EMJ, Moon H, Kizhakkedathu JN. Surface Engineering for Cell-Based Therapies: Techniques for Manipulating Mammalian Cell Surfaces. ACS Biomater Sci Eng 2017; 4:3658-3677. [DOI: 10.1021/acsbiomaterials.7b00514] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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21
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Taylor AC, González CH, Miller BS, Edgington RJ, Ferretti P, Jackman RB. Surface functionalisation of nanodiamonds for human neural stem cell adhesion and proliferation. Sci Rep 2017; 7:7307. [PMID: 28779095 PMCID: PMC5544760 DOI: 10.1038/s41598-017-07361-y] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 06/26/2017] [Indexed: 12/17/2022] Open
Abstract
Biological systems interact with nanostructured materials on a sub-cellular level. These interactions may govern cell behaviour and the precise control of a nanomaterial's structure and surface chemistry allow for a high degree of tunability to be achieved. Cells are surrounded by an extra-cellular matrix with nano-topographical properties. Diamond based materials, and specifically nanostructured diamond has attracted much attention due to its extreme electrical and mechanical properties, chemical inertness and biocompatibility. Here the interaction of nanodiamond monolayers with human Neural Stem Cells (hNSCs) has been investigated. The effect of altering surface functionalisation of nanodiamonds on hNSC adhesion and proliferation has shown that confluent cellular attachment occurs on oxygen terminated nanodiamonds (O-NDs), but not on hydrogen terminated nanodiamonds (H-NDs). Analysis of H and O-NDs by Atomic Force Microscopy, contact angle measurements and protein adsorption suggests that differences in topography, wettability, surface charge and protein adsorption of these surfaces may underlie the difference in cellular adhesion of hNSCs reported here.
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Affiliation(s)
- Alice C Taylor
- London Centre for Nanotechnology and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH, UK
| | - Citlali Helenes González
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
| | - Benjamin S Miller
- London Centre for Nanotechnology and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH, UK
| | - Robert J Edgington
- London Centre for Nanotechnology and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH, UK
| | - Patrizia Ferretti
- Stem Cell and Regenerative Medicine Section, UCL Great Ormond Street Institute of Child Health, University College London, 30 Guilford Street, London, WC1N 1EH, UK
| | - Richard B Jackman
- London Centre for Nanotechnology and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH, UK.
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22
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Chapman CAR, Wang L, Chen H, Garrison J, Lein PJ, Seker E. Nanoporous Gold Biointerfaces: Modifying Nanostructure to Control Neural Cell Coverage and Enhance Electrophysiological Recording Performance. ADVANCED FUNCTIONAL MATERIALS 2017; 27:1604631. [PMID: 28626362 PMCID: PMC5471629 DOI: 10.1002/adfm.201604631] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Nanostructured neural interface coatings have significantly enhanced recording fidelity in both implantable and in vitro devices. As such, nano-porous gold (np-Au) has shown promise as a multifunctional neural interface coating due, in part, to its ability to promote nanostructure-mediated reduction in astrocytic surface coverage while not affecting neuronal coverage. The goal of this study is to provide insight into the mechanisms by which the np-Au nanostructure drives the differential response of neurons versus astrocytes in an in vitro model. Utilizing microfabricated libraries that display varying feature sizes of np-Au, it is demonstrated that np-Au influ-ences neural cell coverage through modulating focal adhesion formation in a feature size-dependent manner. The results here show that surfaces with small (≈30 nm) features control astrocyte spreading through inhibition of focal adhesion formation, while surfaces with large (≈170 nm and greater) features control astrocyte spreading through other mechanotransduction mechanisms. This cellular response combined with lower electrical impedance of np-Au electrodes significantly enhances the fidelity and stability of electrophysiological recordings from cortical neuronglia co-cultures relative to smooth gold electrodes. Finally, by leveraging the effect of nanostructure on neuronal versus glial cell attachment, the use of laser-based nanostructure modulation is demonstrated for selectively patterning neurons with micrometer spatial resolution.
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Affiliation(s)
| | - Ling Wang
- Department of Electrical and Computer Engineering, University of California, Davis, Davis, CA 95616, USA
| | - Hao Chen
- Department of Molecular Biosciences, University of California, Davis, Davis, CA 95616, USA
| | - Joshua Garrison
- Department of Electrical and Computer Engineering, University of California, Davis, Davis, CA 95616, USA
| | - Pamela J Lein
- Department of Molecular Biosciences, University of California, Davis, Davis, CA 95616, USA
| | - Erkin Seker
- Department of Electrical and Computer Engineering, University of California, Davis, Davis, CA 95616, USA
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23
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Dillard P, Pi F, Lellouch AC, Limozin L, Sengupta K. Nano-clustering of ligands on surrogate antigen presenting cells modulates T cell membrane adhesion and organization. Integr Biol (Camb) 2016; 8:287-301. [PMID: 26887857 DOI: 10.1039/c5ib00293a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We investigate the adhesion and molecular organization of the plasma membrane of T lymphocytes interacting with a surrogate antigen presenting cell comprising glass supported ordered arrays of antibody (α-CD3) nano-dots dispersed in a non-adhesive matrix of polyethylene glycol (PEG). The local membrane adhesion and topography, as well as the distribution of the T cell receptors (TCRs) and the kinase ZAP-70, are influenced by dot-geometry, whereas the cell spreading area is determined by the overall average density of the ligands rather than specific characteristics of the dots. TCR clusters are recruited preferentially to the nano-dots and the TCR cluster size distribution has a weak dot-size dependence. On the patterns, the clusters are larger, more numerous, and more enriched in TCRs, as compared to the homogeneously distributed ligands at comparable concentrations. These observations support the idea that non-ligated TCRs residing in the non-adhered parts of the proximal membrane are able to diffuse and enrich the existing clusters at the ligand dots. However, long distance transport is impaired and cluster centralization in the form of a central supramolecular cluster (cSMAC) is not observed. Time-lapse imaging of early cell-surface contacts indicates that the ZAP-70 microclusters are directly recruited to the site of the antibody dots and this process is concomitant with membrane adhesion. These results together point to a complex interplay of adhesion, molecular organization and activation in response to spatially modulated stimulation.
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Affiliation(s)
- Pierre Dillard
- Aix-Marseille Université, CNRS, CINaM-UMR 7325, Marseille, 13288, France. and Laboratoire Adhésion & Inflammation Aix-Marseille Université\Inserm U1067\CNRS-UMR7333, Marseille 13288, France.
| | - Fuwei Pi
- Aix-Marseille Université, CNRS, CINaM-UMR 7325, Marseille, 13288, France.
| | - Annemarie C Lellouch
- Laboratoire Adhésion & Inflammation Aix-Marseille Université\Inserm U1067\CNRS-UMR7333, Marseille 13288, France.
| | - Laurent Limozin
- Laboratoire Adhésion & Inflammation Aix-Marseille Université\Inserm U1067\CNRS-UMR7333, Marseille 13288, France.
| | - Kheya Sengupta
- Aix-Marseille Université, CNRS, CINaM-UMR 7325, Marseille, 13288, France.
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24
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Sulaeva I, Henniges U, Rosenau T, Potthast A. Bacterial cellulose as a material for wound treatment: Properties and modifications. A review. Biotechnol Adv 2015; 33:1547-71. [DOI: 10.1016/j.biotechadv.2015.07.009] [Citation(s) in RCA: 209] [Impact Index Per Article: 23.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 07/02/2015] [Accepted: 07/29/2015] [Indexed: 12/19/2022]
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25
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Geng Y, Wang Z. Review of cellular mechanotransduction on micropost substrates. Med Biol Eng Comput 2015; 54:249-71. [PMID: 26245253 DOI: 10.1007/s11517-015-1343-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2014] [Accepted: 07/07/2015] [Indexed: 01/09/2023]
Abstract
As physical entities, living cells can sense and respond to various stimulations within and outside the body through cellular mechanotransduction. Any deviation in cellular mechanotransduction will not only undermine the orchestrated regulation of mechanical responses, but also lead to the breakdown of their physiological function. Therefore, a quantitative study of cellular mechanotransduction needs to be conducted both in experiments and in computational simulations to investigate the underlying mechanisms of cellular mechanotransduction. In this review, we present an overview of the current knowledge and significant progress in cellular mechanotransduction via micropost substrates. In the aspect of experimental studies, we summarize significant experimental progress and place an emphasis on the coupled relationship among cellular spreading, focal adhesion and contractility as well as the influence of substrate properties on force-involved cellular behaviors. In the other aspect of computational investigations, we outline a coupled framework including the biochemically motivated stress fiber model and thermodynamically motivated adhesion model and present their predicted biomechanical responses and then compare predicted simulation results with experimental observations to further explore the mechanisms of cellular mechanotransduction. At last, we discuss the future perspectives both in experimental technologies and in computational models, as well as facing challenges in the area of cellular mechanotransduction.
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Affiliation(s)
- Yuxu Geng
- State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400030, China
| | - Zhanjiang Wang
- State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400030, China.
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26
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Revach OY, Geiger B. The interplay between the proteolytic, invasive, and adhesive domains of invadopodia and their roles in cancer invasion. Cell Adh Migr 2015; 8:215-25. [PMID: 24714132 DOI: 10.4161/cam.27842] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Invadopodia are actin-based protrusions of the plasma membrane that penetrate into the extracellular matrix (ECM), and enzymatically degrade it. Invadopodia and podosomes, often referred to, collectively, as "invadosomes," are actin-based membrane protrusions that facilitate matrix remodeling and cell invasion across tissues, processes that occur under specific physiological conditions such as bone remodeling, as well as under pathological states such as bone, immune disorders, and cancer metastasis. In this review, we specifically focus on the functional architecture of invadopodia in cancer cells; we discuss here three functional domains of invadopodia responsible for the metalloproteinase-based degradation of the ECM, the cytoskeleton-based mechanical penetration into the matrix, and the integrin adhesome-based adhesion to the ECM. We will describe the structural and molecular organization of each domain and the cross-talk between them during the invasion process.
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Affiliation(s)
- Or-Yam Revach
- Department of Molecular Cell Biology; Weizmann Institute of Science; Rehovot, Israel
| | - Benjamin Geiger
- Department of Molecular Cell Biology; Weizmann Institute of Science; Rehovot, Israel
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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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Kim JD, Heo JS, Park T, Park C, Kim HO, Kim E. Photothermally induced local dissociation of collagens for harvesting of cell sheets. Angew Chem Int Ed Engl 2015; 54:5869-73. [PMID: 25728742 DOI: 10.1002/anie.201411386] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/20/2015] [Indexed: 11/09/2022]
Abstract
The local heating of poly(3,4-ethylenedioxythiophene) (PEDOT) by a photothermal effect directed by near-infrared (NIR) light induces unfolding of absorbed collagen triple helices, yielding soluble collagen single-helical structures. This dissociation of collagens allowed the harvesting of a living idiomorphic cell sheet, achieved upon irradiation with NIR light (λ=808 nm). The PEDOT layer was patterned and cells were successfully cultured on the patterned substrate. Cell sheets of various shapes mirroring the PEDOT pattern could be detached after a few minutes of irradiation with NIR light. The PEDOT patterns guided not only the entire shape of the cell sheets but also the spreading direction of the cells in the sheets. This photothermally induced dissociation of collagen provided a fast non-invasive harvesting method and tailor-made cell-sheet patterns.
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Affiliation(s)
- Jae Dong Kim
- Active Polymer Center for Pattern Integration and Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 120-749 (Republic of Korea)
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29
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Kim JD, Heo JS, Park T, Park C, Kim HO, Kim E. Photothermally Induced Local Dissociation of Collagens for Harvesting of Cell Sheets. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411386] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Bottan S, Robotti F, Jayathissa P, Hegglin A, Bahamonde N, Heredia-Guerrero JA, Bayer IS, Scarpellini A, Merker H, Lindenblatt N, Poulikakos D, Ferrari A. Surface-structured bacterial cellulose with guided assembly-based biolithography (GAB). ACS NANO 2015; 9:206-19. [PMID: 25525956 DOI: 10.1021/nn5036125] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
A powerful replica molding methodology to transfer on-demand functional topographies to the surface of bacterial cellulose nanofiber textures is presented. With this method, termed guided assembly-based biolithography (GAB), a surface-structured polydimethylsiloxane (PDMS) mold is introduced at the gas-liquid interface of an Acetobacter xylinum culture. Upon bacterial fermentation, the generated bacterial cellulose nanofibers are assembled in a three-dimensional network reproducing the geometric shape imposed by the mold. Additionally, GAB yields directional alignment of individual nanofibers and memory of the transferred geometrical features upon dehydration and rehydration of the substrates. Scanning electron and atomic force microscopy are used to establish the good fidelity of this facile and affordable method. Interaction of surface-structured bacterial cellulose substrates with human fibroblasts and keratinocytes illustrates the efficient control of cellular activities which are fundamental in skin wound healing and tissue regeneration. The deployment of surface-structured bacterial cellulose substrates in model animals as skin wound dressing or body implant further proves the high durability and low inflammatory response to the material over a period of 21 days, demonstrating beneficial effects of surface structure on skin regeneration.
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Affiliation(s)
- Simone Bottan
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich , Sonneggstrasse 3, CH-8092 Zurich, Switzerland
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31
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Stewart E, Kobayashi NR, Higgins MJ, Quigley AF, Jamali S, Moulton SE, Kapsa RMI, Wallace GG, Crook JM. Electrical stimulation using conductive polymer polypyrrole promotes differentiation of human neural stem cells: a biocompatible platform for translational neural tissue engineering. Tissue Eng Part C Methods 2014; 21:385-93. [PMID: 25296166 DOI: 10.1089/ten.tec.2014.0338] [Citation(s) in RCA: 121] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Conductive polymers (CPs) are organic materials that hold great promise for biomedicine. Potential applications include in vitro or implantable electrodes for excitable cell recording and stimulation and conductive scaffolds for cell support and tissue engineering. In this study, we demonstrate the utility of electroactive CP polypyrrole (PPy) containing the anionic dopant dodecylbenzenesulfonate (DBS) to differentiate novel clinically relevant human neural stem cells (hNSCs). Electrical stimulation of PPy(DBS) induced hNSCs to predominantly β-III Tubulin (Tuj1) expressing neurons, with lower induction of glial fibrillary acidic protein (GFAP) expressing glial cells. In addition, stimulated cultures comprised nodes or clusters of neurons with longer neurites and greater branching than unstimulated cultures. Cell clusters showed a similar spatial distribution to regions of higher conductivity on the film surface. Our findings support the use of electrical stimulation to promote neuronal induction and the biocompatibility of PPy(DBS) with hNSCs and opens up the possibility of identifying novel mechanisms of fate determination of differentiating human stem cells for advanced in vitro modeling, translational drug discovery, and regenerative medicine.
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Affiliation(s)
- Elise Stewart
- 1 ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, AIIM Facility, Innovation Campus, University of Wollongong , Squires Way, Fairy Meadow, Australia
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32
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Bittig AT, Matschegewski C, Nebe JB, Stählke S, Uhrmacher AM. Membrane related dynamics and the formation of actin in cells growing on micro-topographies: a spatial computational model. BMC SYSTEMS BIOLOGY 2014; 8:106. [PMID: 25200251 PMCID: PMC4363941 DOI: 10.1186/s12918-014-0106-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Accepted: 08/18/2014] [Indexed: 01/07/2023]
Abstract
Background Intra-cellular processes of cells at the interface to an implant surface are influenced significantly by their extra-cellular surrounding. Specifically, when growing osteoblasts on titanium surfaces with regular micro-ranged geometry, filaments are shorter, less aligned and they concentrate at the top of the geometric structures. Changes to the cytoskeleton network, i. e., its localization, alignment, orientation, and lengths of the filaments, as well as the overall concentration and distribution of key-actors are induced. For example, integrin is distributed homogeneously, whereas integrin in activated state and vinculin, both components of focal adhesions, have been found clustered on the micro-ranged geometries. Also, the concentration of Rho, an intracellular signaling protein related to focal adhesion regulation, was significantly lower. Results To explore whether regulations associated with the focal adhesion complex can be responsible for the changed actin filament patterns, a spatial computational model has been developed using ML-Space, a rule-based model description language, and its associated Brownian-motion-based simulator. The focus has been on the deactivation of cofilin in the vicinity of the focal adhesion complex. The results underline the importance of sensing mechanisms to support a clustering of actin filament nucleations on the micro-ranged geometries, and of intracellular diffusion processes, which lead to spatially heterogeneous distributions of active (dephosphorylated) cofilin, which in turn influences the organization of the actin network. We find, for example, that the spatial heterogeneity of key molecular actors can explain the difference in filament lengths in cells on different micro-geometries partly, but to explain the full extent, further model assumptions need to be added and experimentally validated. In particular, our findings and hypothesis referring to the role, distribution, and amount of active cofilin have still to be verified in wet-lab experiments. Conclusion Letting cells grow on surface structures is a possibility to shed new light on the intricate mechanisms that relate membrane and actin related dynamics in the cell. Our results demonstrate the need for declarative expressive spatial modeling approaches that allow probing different hypotheses, and the central role of the focal adhesion complex not only for nucleating actin filaments, but also for regulating possible severing agents locally.
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Affiliation(s)
- Arne T Bittig
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Albert-Einstein-Str. 22, Rostock, 18059, Germany.
| | - Claudia Matschegewski
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany. .,Present address: Agronomy and Crop Science, Faculty of Agricultural and Environmental Sciences, University of Rostock, Rostock, Germany.
| | - J Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany.
| | - Susanne Stählke
- Department of Cell Biology, University Medical Center Rostock, Schillingallee 69Rostock, 18057, Germany.
| | - Adelinde M Uhrmacher
- Modeling and Simulation Group, Institute of Computer Science, University of Rostock, Albert-Einstein-Str. 22, Rostock, 18059, Germany.
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33
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Adutler-Lieber S, Zaretsky I, Platzman I, Deeg J, Friedman N, Spatz JP, Geiger B. Engineering of synthetic cellular microenvironments: implications for immunity. J Autoimmun 2014; 54:100-11. [PMID: 24951031 DOI: 10.1016/j.jaut.2014.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 05/19/2014] [Indexed: 01/01/2023]
Abstract
In this article, we discuss novel synthetic approaches for studying the interactions of cells with their microenvironment. Notably, critical cellular processes such as growth, differentiation, migration, and fate determination, are tightly regulated by interactions with neighboring cells, and the surrounding extracellular matrix. Given the huge complexity of natural cellular environments, and their rich molecular and physical diversity, the mission of understanding "environmental signaling" at a molecular-mechanistic level appears to be extremely challenging. To meet these challenges, attempts have been made in recent years to design synthetic matrices with defined chemical and physical properties, which, artificial though they may be, could reveal basic "design principles" underlying the physiological processes. Here, we summarize recent developments in the characterization of the chemical and physical properties of cell sensing and adhesion, as well as the design and use of engineered, micro- to nanoscale patterned and confined environments, for systematic, comprehensive modulation of the cells' environment. The power of these biomimetic surfaces to highlight environmental signaling events in cells, and in immune cells in particular, will be discussed.
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Affiliation(s)
- Shimrit Adutler-Lieber
- Department of Molecular Cell Biology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Irina Zaretsky
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Ilia Platzman
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Janosch Deeg
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Nir Friedman
- Department of Immunology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
| | - Joachim P Spatz
- Max Planck Institute for Intelligent Systems & University of Heidelberg, Heisenbergstr. 3, 70569 Stuttgart, Germany.
| | - Benjamin Geiger
- Department of Molecular Cell Biology, Weizmann Institute of Science, 234 Herzl St., Rehovot 7610001, Israel.
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34
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Ebrahimkhani MR, Young CL, Lauffenburger DA, Griffith LG, Borenstein JT. Approaches to in vitro tissue regeneration with application for human disease modeling and drug development. Drug Discov Today 2014; 19:754-62. [PMID: 24793141 DOI: 10.1016/j.drudis.2014.04.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 04/16/2014] [Accepted: 04/24/2014] [Indexed: 01/08/2023]
Abstract
Reliable in vitro human disease models that capture the complexity of in vivo tissue behaviors are crucial to gain mechanistic insights into human disease and enable the development of treatments that are effective across broad patient populations. The integration of stem cell technologies, tissue engineering, emerging biomaterials strategies and microfabrication processes, as well as computational and systems biology approaches, is enabling new tools to generate reliable in vitro systems to study the molecular basis of human disease and facilitate drug development. In this review, we discuss these recently developed tools and emphasize opportunities and challenges involved in combining these technologies toward regenerative science.
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Affiliation(s)
- Mohammad R Ebrahimkhani
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Carissa L Young
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Douglas A Lauffenburger
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Linda G Griffith
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Center for Gynepathology Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jeffrey T Borenstein
- Department of Biomedical Engineering, Charles Stark Draper Laboratory, Cambridge, MA 02139, USA.
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35
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Bugnicourt G, Brocard J, Nicolas A, Villard C. Nanoscale surface topography reshapes neuronal growth in culture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:4441-4449. [PMID: 24654569 DOI: 10.1021/la5001683] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Neurons are sensitive to topographical cues provided either by in vivo or in vitro environments on the micrometric scale. We have explored the role of randomly distributed silicon nanopillars on primary hippocampal neurite elongation and axonal differentiation. We observed that neurons adhere on the upper part of nanopillars with a typical distance between adhesion points of about 500 nm. These neurons produce fewer neurites, elongate faster, and differentiate an axon earlier than those grown on flat silicon surfaces. Moreover, when confronted with a differential surface topography, neurons specify an axon preferentially on nanopillars. As a whole, these results highlight the influence of the physical environment in many aspects of neuronal growth.
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Affiliation(s)
- Ghislain Bugnicourt
- Institut Néel, Université Grenoble-Alpes , F-38042 Grenoble, France and Institut Néel/CRETA, CNRS , F-38042 Grenoble, France
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36
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A photoactivatable nanopatterned substrate for analyzing collective cell migration with precisely tuned cell-extracellular matrix ligand interactions. PLoS One 2014; 9:e91875. [PMID: 24632806 PMCID: PMC3954836 DOI: 10.1371/journal.pone.0091875] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 02/17/2014] [Indexed: 11/19/2022] Open
Abstract
Collective cell migration is involved in many biological and pathological processes. Various factors have been shown to regulate the decision to migrate collectively or individually, but the impact of cell-extracellular matrix (ECM) interactions is still debated. Here, we developed a method for analyzing collective cell migration by precisely tuning the interactions between cells and ECM ligands. Gold nanoparticles are arrayed on a glass substrate with a defined nanometer spacing by block copolymer micellar nanolithography (BCML), and photocleavable poly(ethylene glycol) (Mw = 12 kDa, PEG12K) and a cyclic RGD peptide, as an ECM ligand, are immobilized on this substrate. The remaining glass regions are passivated with PEG2K-silane to make cells interact with the surface via the nanoperiodically presented cyclic RGD ligands upon the photocleavage of PEG12K. On this nanostructured substrate, HeLa cells are first patterned in photo-illuminated regions, and cell migration is induced by a second photocleavage of the surrounding PEG12K. The HeLa cells gradually lose their cell-cell contacts and become disconnected on the nanopatterned substrate with 10-nm particles and 57-nm spacing, in contrast to their behavior on the homogenous substrate. Interestingly, the relationship between the observed migration collectivity and the cell-ECM ligand interactions is the opposite of that expected based on conventional soft matter models. It is likely that the reduced phosphorylation at tyrosine-861 of focal adhesion kinase (FAK) on the nanopatterned surface is responsible for this unique migration behavior. These results demonstrate the usefulness of the presented method in understanding the process of determining collective and non-collective migration features in defined micro- and nano-environments and resolving the crosstalk between cell-cell and cell-ECM adhesions.
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37
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Potthoff E, Franco D, D'Alessandro V, Starck C, Falk V, Zambelli T, Vorholt JA, Poulikakos D, Ferrari A. Toward a rational design of surface textures promoting endothelialization. NANO LETTERS 2014; 14:1069-1079. [PMID: 24428164 DOI: 10.1021/nl4047398] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The safe integration of cardiovascular devices requires the sustainable coverage of their luminal surface by endothelial cells (ECs). The engineering of active surface textures has the potential to coordinate cellular adhesion and migration under the action of hemodynamic forces. We define a paradigm to rationally design textures maximizing EC activities as a function of the applied stresses. This is based on harnessing the adhesions established by ECs through fine-tuning of the vertical extend of the underlying surface nanotopography.
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Affiliation(s)
- Eva Potthoff
- Laboratory of Thermodynamics in Emerging Technologies, Department of Mechanical and Process Engineering, ETH Zurich , Sonneggstrasse 3, CH-8092 Zurich, Switzerland
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38
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Amna T, Shamshi Hassan M, Khil MS, Lee HK, Hwang IH. Electrospun nanofibers of ZnO-TiO2
hybrid: characterization and potential as an extracellular scaffold for supporting myoblasts. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5350] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Touseef Amna
- Department of Animal Sciences and Biotechnology; Chonbuk National University; Jeonju 561-756 Korea
| | - M. Shamshi Hassan
- Department of Organic Materials and Fiber Engineering; Chonbuk National University; Jeonju 561-756 Korea
| | - Myung-Seob Khil
- Department of Organic Materials and Fiber Engineering; Chonbuk National University; Jeonju 561-756 Korea
| | - Hak-Kyo Lee
- Genomic Informatics Center; Hankyong National University; Anseong South Korea
| | - I. H. Hwang
- Department of Animal Sciences and Biotechnology; Chonbuk National University; Jeonju 561-756 Korea
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39
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Platzman I, Janiesch JW, Spatz JP. Synthesis of nanostructured and biofunctionalized water-in-oil droplets as tools for homing T cells. J Am Chem Soc 2013; 135:3339-42. [PMID: 23419177 PMCID: PMC3806295 DOI: 10.1021/ja311588c] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Indexed: 12/16/2022]
Abstract
Activation, ex vivo expansion of T cells, differentiation into a regulatory subset, and its phenotype-specific high-throughput selection represent major challenges in immunobiology. In part, this is due to the lack of technical means to synthesize suitable 3D extracellular systems to imitate ex vivo the cellular interactions between T cells and antigen-presenting cells (APCs). In this study, we synthesized a new type of gold-linked surfactant and used a drop-based microfluidic device to develop and characterize novel nanostructured and specifically biofunctionalized droplets of water-in-oil emulsions as 3D APC analogues. Combining flexible biofunctionalization with the pliable physical properties of the nanostructured droplets provided this system with superior properties in comparison with previously reported synthetic APC analogues.
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Affiliation(s)
| | | | - Joachim Pius Spatz
- Department of New
Materials and Biosystems, Max Planck Institute for Intelligent
Systems, Heisenbergstr.
3, 70569 Stuttgart, Germany, and Department of Biophysical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
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40
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Spira ME, Hai A. Multi-electrode array technologies for neuroscience and cardiology. NATURE NANOTECHNOLOGY 2013; 8:83-94. [PMID: 23380931 DOI: 10.1038/nnano.2012.265] [Citation(s) in RCA: 534] [Impact Index Per Article: 48.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Accepted: 12/18/2012] [Indexed: 05/18/2023]
Abstract
At present, the prime methodology for studying neuronal circuit-connectivity, physiology and pathology under in vitro or in vivo conditions is by using substrate-integrated microelectrode arrays. Although this methodology permits simultaneous, cell-non-invasive, long-term recordings of extracellular field potentials generated by action potentials, it is 'blind' to subthreshold synaptic potentials generated by single cells. On the other hand, intracellular recordings of the full electrophysiological repertoire (subthreshold synaptic potentials, membrane oscillations and action potentials) are, at present, obtained only by sharp or patch microelectrodes. These, however, are limited to single cells at a time and for short durations. Recently a number of laboratories began to merge the advantages of extracellular microelectrode arrays and intracellular microelectrodes. This Review describes the novel approaches, identifying their strengths and limitations from the point of view of the end users--with the intention to help steer the bioengineering efforts towards the needs of brain-circuit research.
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Affiliation(s)
- Micha E Spira
- The Alexander Silberman Life Sciences Institute, and the Harvey M. Kruger Family Center for Nanoscience, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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41
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Cortese B, Riehle MO, D'Amone S, Gigli G. Influence of variable substrate geometry on wettability and cellular responses. J Colloid Interface Sci 2012; 394:582-9. [PMID: 23270757 DOI: 10.1016/j.jcis.2012.11.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 11/23/2012] [Accepted: 11/24/2012] [Indexed: 01/13/2023]
Abstract
In this report, we evaluate the impact of a systematic change to the extracellular environment on cell morphology and functionality by combining the inherent properties of biocompatible polymers such as polydimethylsiloxane and polycaprolactone with a specific surface response. By microstructuring pillars and pits on the substrates, varying spacing and height of the structures, we investigate the role of topography in fibroblast cell adhesion and viability. The change of wetting behaviour was tailored and evaluated in terms of contact angle measurements. It was shown that the range of micro-scale physical cues at the interface between the cells and the surrounding environment affects cell shape and migrations, indicating a tendency to respond differently to higher features of the micro-scale. We found that surface topography seems dominant over material wettability, fibroblasts responded to variations in topography by altering morphology and migrating along the direction of spacing among the features biased by the height of structures and not by the material. It is therefore possible to selectively influence either cell adhesion or morphology by choosing adequate topography of the surface. This work can impact in the design of biomaterials and can be applied to implanted biomedical devices, tissue engineering scaffolds and lab on chip devices.
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Affiliation(s)
- Barbara Cortese
- Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche, Via Salaria km. 29.300, 00015 Monterotondo Stazione, Roma, Italy.
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Kwiat M, Elnathan R, Pevzner A, Peretz A, Barak B, Peretz H, Ducobni T, Stein D, Mittelman L, Ashery U, Patolsky F. Highly ordered large-scale neuronal networks of individual cells - toward single cell to 3D nanowire intracellular interfaces. ACS APPLIED MATERIALS & INTERFACES 2012; 4:3542-9. [PMID: 22724437 DOI: 10.1021/am300602e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The use of artificial, prepatterned neuronal networks in vitro is a promising approach for studying the development and dynamics of small neural systems in order to understand the basic functionality of neurons and later on of the brain. The present work presents a high fidelity and robust procedure for controlling neuronal growth on substrates such as silicon wafers and glass, enabling us to obtain mature and durable neural networks of individual cells at designed geometries. It offers several advantages compared to other related techniques that have been reported in recent years mainly because of its high yield and reproducibility. The procedure is based on surface chemistry that allows the formation of functional, tailormade neural architectures with a micrometer high-resolution partition, that has the ability to promote or repel cells attachment. The main achievements of this work are deemed to be the creation of a large scale neuronal network at low density down to individual cells, that develop intact typical neurites and synapses without any glia-supportive cells straight from the plating stage and with a relatively long term survival rate, up to 4 weeks. An important application of this method is its use on 3D nanopillars and 3D nanowire-device arrays, enabling not only the cell bodies, but also their neurites to be positioned directly on electrical devices and grow with registration to the recording elements underneath.
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Affiliation(s)
- Moria Kwiat
- School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences, ‡Department of Physiology, Sackler Medical School, and §Department of Neurobiology, The George S. Wise Faculty of Life Sciences, School of Neuroscience, Tel Aviv University , Tel Aviv 69978, Israel
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Hegge S, Uhrig K, Streichfuss M, Kynast-Wolf G, Matuschewski K, Spatz JP, Frischknecht F. Direct manipulation of malaria parasites with optical tweezers reveals distinct functions of Plasmodium surface proteins. ACS NANO 2012; 6:4648-4662. [PMID: 22568891 DOI: 10.1021/nn203616u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Plasmodium sporozoite motility is essential for establishing malaria infections. It depends on initial adhesion to a substrate as well as the continuous turnover of discrete adhesion sites. Adhesion and motility are mediated by a dynamic actin cytoskeleton and surface proteins. The mode of adhesion formation and the integration of adhesion forces into fast and continuous forward locomotion remain largely unknown. Here, we use optical tweezers to directly trap individual parasites and probe adhesion formation. We find that sporozoites lacking the surface proteins TRAP and S6 display distinct defects in initial adhesion; trap(-) sporozoites adhere preferentially with their front end, while s6(-) sporozoites show no such preference. The cohesive strength of the initial adhesion site is differently affected by actin filament depolymerization at distinct adhesion sites along the parasite for trap(-) and s6(-) sporozoites. These spatial differences between TRAP and S6 in their functional interaction with actin filaments show that these proteins have nonredundant roles during adhesion and motility. We suggest that complex protein-protein interactions and signaling events govern the regulation of parasite gliding at different sites along the parasite. Investigating how these events are coordinated will be essential for our understanding of sporozoite gliding motility, which is crucial for malaria infection. Laser tweezers will be a valuable part of the toolset.
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Affiliation(s)
- Stephan Hegge
- Parasitology, Department of Infectious Diseases, University of Heidelberg Medical School, Im Neuenheimer Feld 324, 69120 Heidelberg, Germany
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Boccafoschi F, Mosca C, Cannas M. Cardiovascular biomaterials: when the inflammatory response helps to efficiently restore tissue functionality? J Tissue Eng Regen Med 2012; 8:253-67. [DOI: 10.1002/term.1526] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 01/30/2012] [Accepted: 04/03/2012] [Indexed: 01/25/2023]
Affiliation(s)
- F. Boccafoschi
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
| | - C. Mosca
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
| | - M. Cannas
- Department of Health Sciences; University of Piemonte Orientale; “A. Avogadro” 28100 Novara Italy
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Uhlig K, Boysen B, Lankenau A, Jaeger M, Wischerhoff E, Lutz JF, Laschewsky A, Duschl C. On the influence of the architecture of poly(ethylene glycol)-based thermoresponsive polymers on cell adhesion. BIOMICROFLUIDICS 2012; 6:24129. [PMID: 23761842 PMCID: PMC3386990 DOI: 10.1063/1.4729130] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 05/28/2012] [Indexed: 05/25/2023]
Abstract
Thermoresponsive polymer surface coatings are a promising tool for cell culture applications. They allow for a mild way of cell detachment that preserves the activity of membrane proteins-a prerequisite for reliable cell analysis. To enlarge the application range of these coatings to cells with different adhesion properties, we synthesized various novel poly(ethylene glycol)-based thermoresponsive polymers and describe how (i) their chemical structure and (ii) their surface density affect their efficiency. In order to quantify the influence of both factors, the time for cell spreading and rounding efficiency were observed. As a result, efficiency of cell rounding, which is closely correlated to cell detachment, is less affected by both factors than the time needed for cell spreading. This time can effectively be adjusted by the molecular architecture which includes the length of the polymer backbone and the side chains. Based on this work, recommendations are given for future optimization of functionality of thermoresponsive polymer coatings for cell culture applications.
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Affiliation(s)
- Katja Uhlig
- Fraunhofer Institute for Biomedical Engineering (IBMT), Potsdam, Germany
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Bidan CM, Kommareddy KP, Rumpler M, Kollmannsberger P, Bréchet YJM, Fratzl P, Dunlop JWC. How linear tension converts to curvature: geometric control of bone tissue growth. PLoS One 2012; 7:e36336. [PMID: 22606256 PMCID: PMC3350529 DOI: 10.1371/journal.pone.0036336] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 03/30/2012] [Indexed: 11/24/2022] Open
Abstract
This study investigated how substrate geometry influences in-vitro tissue formation at length scales much larger than a single cell. Two-millimetre thick hydroxyapatite plates containing circular pores and semi-circular channels of 0.5 mm radius, mimicking osteons and hemi-osteons respectively, were incubated with MC3T3-E1 cells for 4 weeks. The amount and shape of the tissue formed in the pores, as measured using phase contrast microscopy, depended on the substrate geometry. It was further demonstrated, using a simple geometric model, that the observed curvature-controlled growth can be derived from the assembly of tensile elements on a curved substrate. These tensile elements are cells anchored on distant points of the curved surface, thus creating an actin “chord” by generating tension between the adhesion sites. Such a chord model was used to link the shape of the substrate to cell organisation and tissue patterning. In a pore with a circular cross-section, tissue growth increases the average curvature of the surface, whereas a semi-circular channel tends to be flattened out. Thereby, a single mechanism could describe new tissue growth in both cortical and trabecular bone after resorption due to remodelling. These similarities between in-vitro and in-vivo patterns suggest geometry as an important signal for bone remodelling.
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Affiliation(s)
- Cécile M. Bidan
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
- * E-mail: (CB); (JD)
| | - Krishna P. Kommareddy
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Monika Rumpler
- Ludwig Boltzmann Institute of Osteology at the Hanusch Hospital of WGKK and AUVA Trauma Centre Meidling, 1st Medical Department, Hanusch Hospital, Vienna, Austria
| | - Philip Kollmannsberger
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - Yves J. M. Bréchet
- Materials and Processes Science and Engineering Laboratory (SIMaP), Grenoble, France
| | - Peter Fratzl
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
| | - John W. C. Dunlop
- Department of Biomaterials, Max Planck Institute of Colloids and Interfaces, Potsdam, Germany
- * E-mail: (CB); (JD)
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Prostaglandins in cancer cell adhesion, migration, and invasion. Int J Cell Biol 2012; 2012:723419. [PMID: 22505934 PMCID: PMC3299390 DOI: 10.1155/2012/723419] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Accepted: 10/08/2011] [Indexed: 12/21/2022] Open
Abstract
Prostaglandins exert a profound influence over the adhesive, migratory, and invasive behavior of cells during the development and progression of cancer. Cyclooxygenase-2 (COX-2) and microsomal prostaglandin E2 synthase-1 (mPGES-1) are upregulated in inflammation and cancer. This results in the production of prostaglandin E2 (PGE2), which binds to and activates G-protein-coupled prostaglandin E1–4 receptors (EP1–4). Selectively targeting the COX-2/mPGES-1/PGE2/EP1–4 axis of the prostaglandin pathway can reduce the adhesion, migration, invasion, and angiogenesis. Once stimulated by prostaglandins, cadherin adhesive connections between epithelial or endothelial cells are lost. This enables cells to invade through the underlying basement membrane and extracellular matrix (ECM). Interactions with the ECM are mediated by cell surface integrins by “outside-in signaling” through Src and focal adhesion kinase (FAK) and/or “inside-out signaling” through talins and kindlins. Combining the use of COX-2/mPGES-1/PGE2/EP1–4 axis-targeted molecules with those targeting cell surface adhesion receptors or their downstream signaling molecules may enhance cancer therapy.
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Porat Z, Yaron I, Katz BZ, Kam Z, Geiger B. Shear flow-induced formation of tubular cell protrusions in multiple myeloma cells. J Cell Physiol 2011; 226:3197-207. [PMID: 21344380 DOI: 10.1002/jcp.22680] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Exposure of live cells to shear flow induces major changes in cell shape, adhesion to the extracellular matrix, and migration. In the present study, we show that exposure of cultured multiple myeloma (MM) cells to shear flow of 4-36 dynes/cm(2) triggers the extension of long tubular protrusions (denoted flow-induced protrusions, or FLIPs) in the direction of the flow. These FLIPs were found to be rich in actin, contain few or no microtubules and, apart from endoplasmic reticulum (ER)-like membranal structures, are devoid of organelles. Studying the dynamics of this process revealed that FLIPs elongate at their tips in a shear force-dependent manner, and retract at their bases. Examination of this force dependence revealed considerable heterogeneity in the mechanosensitivity of individual cells, most likely reflecting the diversity of the malignant B cell population. The mechanisms underlying FLIP formation following mechanical perturbation, and their relevance to the cellular trafficking of MM cells, are discussed.
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Affiliation(s)
- Ziv Porat
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
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The relative importance of topography and RGD ligand density for endothelial cell adhesion. PLoS One 2011; 6:e21869. [PMID: 21779342 PMCID: PMC3136933 DOI: 10.1371/journal.pone.0021869] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 06/08/2011] [Indexed: 11/21/2022] Open
Abstract
The morphology and function of endothelial cells depends on the physical and chemical characteristics of the extracellular environment. Here, we designed silicon surfaces on which topographical features and surface densities of the integrin binding peptide arginine-glycine-aspartic acid (RGD) could be independently controlled. We used these surfaces to investigate the relative importance of the surface chemistry of ligand presentation versus surface topography in endothelial cell adhesion. We compared cell adhesion, spreading and migration on surfaces with nano- to micro-scaled pyramids and average densities of 6×102–6×1011 RGD/mm2. We found that fewer cells adhered onto rough than flat surfaces and that the optimal average RGD density for cell adhesion was 6×105 RGD/mm2 on flat surfaces and substrata with nano-scaled roughness. Only on surfaces with micro-scaled pyramids did the topography hinder cell migration and a lower average RGD density was optimal for adhesion. In contrast, cell spreading was greatest on surfaces with 6×108 RGD/mm2 irrespectively of presence of feature and their size. In summary, our data suggest that the size of pyramids predominately control the number of endothelial cells that adhere to the substratum but the average RGD density governs the degree of cell spreading and length of focal adhesion within adherent cells. The data points towards a two-step model of cell adhesion: the initial contact of cells with a substratum may be guided by the topography while the engagement of cell surface receptors is predominately controlled by the surface chemistry.
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Orita T, Tomita M, Kato K. Regulation of cellular responses to macroporous inorganic films prepared by the inverse-opal method. Colloids Surf B Biointerfaces 2011; 84:187-97. [DOI: 10.1016/j.colsurfb.2010.12.032] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 12/29/2010] [Indexed: 12/25/2022]
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