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Tondera C, Akbar TF, Thomas AK, Lin W, Werner C, Busskamp V, Zhang Y, Minev IR. Highly Conductive, Stretchable, and Cell-Adhesive Hydrogel by Nanoclay Doping. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901406. [PMID: 31025545 DOI: 10.1002/smll.201901406] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 04/11/2019] [Indexed: 05/25/2023]
Abstract
Electrically conductive materials that mimic physical and biological properties of tissues are urgently required for seamless brain-machine interfaces. Here, a multinetwork hydrogel combining electrical conductivity of 26 S m-1 , stretchability of 800%, and tissue-like elastic modulus of 15 kPa with mimicry of the extracellular matrix is reported. Engineering this unique set of properties is enabled by a novel in-scaffold polymerization approach. Colloidal hydrogels of the nanoclay Laponite are employed as supports for the assembly of secondary polymer networks. Laponite dramatically increases the conductivity of in-scaffold polymerized poly(ethylene-3,4-diethoxy thiophene) in the absence of other dopants, while preserving excellent stretchability. The scaffold is coated with a layer containing adhesive peptide and polysaccharide dextran sulfate supporting the attachment, proliferation, and neuronal differentiation of human induced pluripotent stem cells directly on the surface of conductive hydrogels. Due to its compatibility with simple extrusion printing, this material promises to enable tissue-mimetic neurostimulating electrodes.
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Affiliation(s)
- Christoph Tondera
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Teuku Fawzul Akbar
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Dresden, 01069, Germany
| | - Alvin Kuriakose Thomas
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Weilin Lin
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Carsten Werner
- Leibniz Institute of Polymer Research Dresden (IPF), Max Bergmann Center of Biomaterials Dresden (MBC), Dresden, 01069, Germany
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Volker Busskamp
- Center for Regenerative Therapies Dresden (CRTD), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Yixin Zhang
- B CUBE Center for Molecular Bioengineering, Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
| | - Ivan R Minev
- Biotechnology Center (BIOTEC), Center for Molecular and Cellular Bioengineering (CMCB), Technische Universität Dresden, Dresden, 01307, Germany
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Lee M, Bae K, Guillon P, Chang J, Arlov Ø, Zenobi-Wong M. Exploitation of Cationic Silica Nanoparticles for Bioprinting of Large-Scale Constructs with High Printing Fidelity. ACS APPLIED MATERIALS & INTERFACES 2018; 10:37820-37828. [PMID: 30360117 DOI: 10.1021/acsami.8b13166] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three-dimensional (3D) bioprinting allows the fabrication of 3D structures containing living cells whose 3D shape and architecture are matched to a patient. The feature is desirable to achieve personalized treatment of trauma or diseases. However, realization of this promising technique in the clinic is greatly hindered by inferior mechanical properties of most biocompatible bioink materials. Here, we report a novel strategy to achieve printing large constructs with high printing quality and fidelity using an extrusion-based printer. We incorporate cationic nanoparticles in an anionic polymer mixture, which significantly improves mechanical properties, printability, and printing fidelity of the polymeric bioink due to electrostatic interactions between the nanoparticles and polymers. Addition of cationic-modified silica nanoparticles to an anionic polymer mixture composed of alginate and gellan gum results in significantly increased zero-shear viscosity (1062%) as well as storage modulus (486%). As a result, it is possible to print a large (centimeter-scale) porous structure with high printing quality, whereas the use of the polymeric ink without the nanoparticles leads to collapse of the printed structure during printing. We demonstrate such a mechanical enhancement is achieved by adding nanoparticles within a certain size range (<100 nm) and depends on concentration and surface chemistry of the nanoparticles as well as the length of polymers. Furthermore, shrinkage and swelling of the printed constructs during cross-linking are significantly suppressed by addition of nanoparticles compared with the ink without nanoparticles, which leads to high printing fidelity after cross-linking. The incorporated nanoparticles do not compromise biocompatibility of the polymeric ink, where high cell viability (>90%) and extracellular matrix secretion are observed for cells printed with nanocomposite inks. The design principle demonstrated can be applied for various anionic polymer-based systems, which could lead to achievement of 3D bioprinting-based personalized treatment.
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Affiliation(s)
- Mihyun Lee
- Tissue Engineering + Biofabrication Laboratory, Institute for Biomechanics , ETH Zürich , Otto-Stern-Weg 7 , 8093 Zürich , Switzerland
| | - Kraun Bae
- Tissue Engineering + Biofabrication Laboratory, Institute for Biomechanics , ETH Zürich , Otto-Stern-Weg 7 , 8093 Zürich , Switzerland
| | - Pierre Guillon
- Tissue Engineering + Biofabrication Laboratory, Institute for Biomechanics , ETH Zürich , Otto-Stern-Weg 7 , 8093 Zürich , Switzerland
| | - Jin Chang
- Tissue Engineering + Biofabrication Laboratory, Institute for Biomechanics , ETH Zürich , Otto-Stern-Weg 7 , 8093 Zürich , Switzerland
| | - Øystein Arlov
- Department of Biotechnology and Nanomedicine , SINTEF Industry , Richard Birkelands vei 3B , 7034 Trondheim , Norway
| | - Marcy Zenobi-Wong
- Tissue Engineering + Biofabrication Laboratory, Institute for Biomechanics , ETH Zürich , Otto-Stern-Weg 7 , 8093 Zürich , Switzerland
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Buwalda SJ, Vermonden T, Hennink WE. Hydrogels for Therapeutic Delivery: Current Developments and Future Directions. Biomacromolecules 2017; 18:316-330. [DOI: 10.1021/acs.biomac.6b01604] [Citation(s) in RCA: 251] [Impact Index Per Article: 35.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Sytze J. Buwalda
- Institute
of Biomolecules Max Mousseron, Department of Artificial Biopolymers,
Faculty of Pharmacy, UMR 5247, CNRS-University of Montpellier-ENSCM, Montpellier, France
| | - Tina Vermonden
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Wim E. Hennink
- Department
of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
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Blaeser A, Duarte Campos DF, Puster U, Richtering W, Stevens MM, Fischer H. Controlling Shear Stress in 3D Bioprinting is a Key Factor to Balance Printing Resolution and Stem Cell Integrity. Adv Healthc Mater 2016; 5:326-33. [PMID: 26626828 DOI: 10.1002/adhm.201500677] [Citation(s) in RCA: 420] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 10/05/2015] [Indexed: 11/10/2022]
Abstract
A microvalve-based bioprinting system for the manufacturing of high-resolution, multimaterial 3D-structures is reported. Applying a straightforward fluid-dynamics model, the shear stress at the nozzle site can precisely be controlled. Using this system, a broad study on how cell viability and proliferation potential are affected by different levels of shear stress is conducted. Complex, multimaterial 3D structures are printed with high resolution. This work pioneers the investigation of shear stress-induced cell damage in 3D bioprinting and might help to comprehend and improve the outcome of cell-printing studies in the future.
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Affiliation(s)
- Andreas Blaeser
- Department of Dental Materials and Biomaterials Research; RWTH Aachen University Hospital; Pauwelsstrasse 30 52074 Aachen Germany
| | - Daniela Filipa Duarte Campos
- Department of Dental Materials and Biomaterials Research; RWTH Aachen University Hospital; Pauwelsstrasse 30 52074 Aachen Germany
| | - Uta Puster
- Department of Dental Materials and Biomaterials Research; RWTH Aachen University Hospital; Pauwelsstrasse 30 52074 Aachen Germany
| | - Walter Richtering
- Institute of Physical Chemistry; RWTH Aachen University; Landoltweg 2 52074 Aachen Germany
| | - Molly M. Stevens
- Department of Materials; Department of Bioengineering and Institute of Biomedical Engineering; Imperial College London; London SW7 2AZ London UK
| | - Horst Fischer
- Department of Dental Materials and Biomaterials Research; RWTH Aachen University Hospital; Pauwelsstrasse 30 52074 Aachen Germany
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