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Lou J, Meyer C, Vitner EB, Adu-Berchie K, Dacus MT, Bovone G, Chen A, To T, Weitz DA, Mooney DJ. Surface-Functionalized Microgels as Artificial Antigen-Presenting Cells to Regulate Expansion of T Cells. Adv Mater 2024:e2309860. [PMID: 38615189 DOI: 10.1002/adma.202309860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 03/27/2024] [Indexed: 04/15/2024]
Abstract
Artificial antigen-presenting cells (aAPCs) are currently used to manufacture T cells for adoptive therapy in cancer treatment, but a readily tunable and modular system could enable both rapid T cell expansion and control over T cell phenotype. Here, we show that microgels with tailored surface biochemical properties can serve as aAPCs to mediate T cell activation and expansion. Surface functionalization of microgels was achieved via layer-by-layer coating using oppositely charged polymers, forming a thin but dense polymer layer on the surface. This facile and versatile approach is compatible with a variety of coating polymers and allows efficient and flexible surface-specific conjugation of defined peptides or proteins. We demonstrate that tethering appropriate stimulatory ligands on the microgel surface efficiently activates T cells for polyclonal and antigen-specific expansion. The expansion, phenotype and functional outcome of primary mouse and human T cells can be regulated by modulating the concentration, ratio and distribution of stimulatory ligands presented on microgel surfaces as well as the stiffness and viscoelasticity of the microgels. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Junzhe Lou
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Charlotte Meyer
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Department of Information Technology and Electrical Engineering, ETH Zürich, Zürich, Switzerland
| | - Einat B Vitner
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Kwasi Adu-Berchie
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Mason T Dacus
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Giovanni Bovone
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - Anqi Chen
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
| | - Tania To
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
| | - David A Weitz
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
- Department of Physics, Harvard University, Cambridge, MA, USA
| | - David J Mooney
- Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA, USA
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2
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Sun Q, Tao S, Bovone G, Han G, Deshmukh D, Tibbitt MW, Ren Q, Bertsch P, Siqueira G, Fischer P. Versatile Mechanically Tunable Hydrogels for Therapeutic Delivery Applications. Adv Healthc Mater 2024:e2304287. [PMID: 38488218 DOI: 10.1002/adhm.202304287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Indexed: 04/02/2024]
Abstract
Hydrogels provide a versatile platform for biomedical material fabrication that can be structurally and mechanically fine-tuned to various tissues and applications. Applications of hydrogels in biomedicine range from highly dynamic injectable hydrogels that can flow through syringe needles and maintain or recover their structure after extrusion to solid-like wound-healing patches that need to be stretchable while providing a selective physical barrier. In this study, a toolbox is designed using thermo-responsive poly(N-isopropylacrylamide) (PNIPAM) polymeric matrices and nanocelluloses as reinforcing agent to obtain biocompatible hydrogels with altering mechanical properties, from a liquid injectable to a solid-like elastic hydrogel. The liquid hydrogels possess low viscosity and shear-thinning properties at 25 °C, which allows facile injection at room temperature, while they become viscoelastic gels at body temperature. In contrast, the covalently cross-linked solid-like hydrogels exhibit enhanced viscoelasticity. The liquid hydrogels are biocompatible and are able to delay the in vitro release and maintain the bioactivity of model drugs. The antimicrobial agent loaded solid-like hydrogels are effective against typical wound-associated pathogens. This work presents a simple method of tuning hydrogel mechanical strength to easily adapt to applications in different soft tissues and broaden the potential of renewable bio-nanoparticles in hybrid biomaterials with controlled drug release capabilities.
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Affiliation(s)
- Qiyao Sun
- Department of Health Science and Technology, ETH Zurich, Zurich, 8092, Switzerland
| | - Siyuan Tao
- Laboratory for Biointerfaces, Empa, St. Gallen, 9014, Switzerland
| | - Giovanni Bovone
- Macromolecular Engineering Laboratory, D-MAVT, ETH Zurich, Zurich, 8092, Switzerland
| | - Garam Han
- Department of Health Science and Technology, ETH Zurich, Zurich, 8092, Switzerland
| | - Dhananjay Deshmukh
- Macromolecular Engineering Laboratory, D-MAVT, ETH Zurich, Zurich, 8092, Switzerland
- Institute for Mechanical Systems, D-MAVT, ETH Zurich, Zurich, 8092, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, D-MAVT, ETH Zurich, Zurich, 8092, Switzerland
| | - Qun Ren
- Laboratory for Biointerfaces, Empa, St. Gallen, 9014, Switzerland
| | - Pascal Bertsch
- Drug Delivery and Biophysics of Biopharmaceuticals, Department of Pharmacy, University of Copenhagen, Copenhagen, 2100, Denmark
| | - Gilberto Siqueira
- Cellulose & Wood Materials Laboratory, EMPA, Dübendorf, 8600, Switzerland
| | - Peter Fischer
- Department of Health Science and Technology, ETH Zurich, Zurich, 8092, Switzerland
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Bovone G, Cousin L, Steiner F, Tibbitt MW. Solvent Controls Nanoparticle Size during Nanoprecipitation by Limiting Block Copolymer Assembly. Macromolecules 2022; 55:8040-8048. [PMID: 36186573 PMCID: PMC9520972 DOI: 10.1021/acs.macromol.2c00907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 07/20/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Lucien Cousin
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Fabian Steiner
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Mark W. Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
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Komsthöft T, Bovone G, Bernhard S, Tibbitt MW. Polymer functionalization of inorganic nanoparticles for biomedical applications. Curr Opin Chem Eng 2022. [DOI: 10.1016/j.coche.2022.100849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Klubthawee N, Bovone G, Marco‐Dufort B, Guzzi EA, Aunpad R, Tibbitt MW. Biopolymer Nano-Network for Antimicrobial Peptide Protection and Local Delivery. Adv Healthc Mater 2022; 11:e2101426. [PMID: 34936732 DOI: 10.1002/adhm.202101426] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 12/03/2021] [Indexed: 12/12/2022]
Abstract
Antimicrobial resistance (AMR) develops when bacteria no longer respond to conventional antimicrobial treatment. The limited treatment options for resistant infections result in a significantly increased medical burden. Antimicrobial peptides offer advantages for treatment of resistant infections, including broad-spectrum activity and lower risk of resistance development. However, sensitivity to proteolytic cleavage often limits their clinical application. Here, a moldable and biodegradable colloidal nano-network is presented that protects bioactive peptides from enzymatic degradation and delivers them locally. An antimicrobial peptide, PA-13, is encapsulated electrostatically into positively and negatively charged nanoparticles made of chitosan and dextran sulfate without requiring chemical modification. Mixing and concentration of oppositely charged particles form a nano-network with the rheological properties of a cream or injectable hydrogel. After exposure to proteolytic enzymes, the formed nano-network loaded with PA-13 eliminates Pseudomonas aeruginosa during in vitro culture and in an ex vivo porcine skin model while the unencapsulated PA-13 shows no antibacterial effect. This demonstrates the ability of the nano-network to protect the antimicrobial peptide in an enzyme-challenged environment, such as a wound bed. Overall, the nano-network presents a useful platform for antimicrobial peptide protection and delivery without impacting peptide bioactivity.
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Affiliation(s)
- Natthaporn Klubthawee
- Graduate Program in Biomedical Sciences Faculty of Allied Health Sciences Thammasat University Pathum Thani 12120 Thailand
| | - Giovanni Bovone
- Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich 8092 Switzerland
| | - Bruno Marco‐Dufort
- Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich 8092 Switzerland
| | - Elia A. Guzzi
- Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich 8092 Switzerland
| | - Ratchaneewan Aunpad
- Graduate Program in Biomedical Sciences Faculty of Allied Health Sciences Thammasat University Pathum Thani 12120 Thailand
| | - Mark W. Tibbitt
- Macromolecular Engineering Laboratory Department of Mechanical and Process Engineering ETH Zurich Zurich 8092 Switzerland
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Bovone G, Guzzi EA, Bernhard S, Weber T, Dranseikiene D, Tibbitt MW. Supramolecular Reinforcement of Polymer-Nanoparticle Hydrogels for Modular Materials Design. Adv Mater 2022; 34:e2106941. [PMID: 34954875 DOI: 10.1002/adma.202106941] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Moldable hydrogels are increasingly used as injectable or extrudable materials in biomedical and industrial applications owing to their ability to flow under applied stress (shear-thin) and reform a stable network (self-heal). Nanoscale components can be added to dynamic polymer networks to modify their mechanical properties and broaden the scope of applications. Viscoelastic polymer-nanoparticle (PNP) hydrogels comprise a versatile and tunable class of dynamic nanocomposite materials that form via reversible interactions between polymer chains and nanoparticles. However, PNP hydrogel formation is restricted to specific interactions between select polymers and nanoparticles, resulting in a limited range of mechanical properties and constraining their utility. Here, a facile strategy to reinforce PNP hydrogels through the simple addition of α-cyclodextrin (αCD) to the formulation is introduced. The formation of polypseudorotoxanes between αCD and the hydrogel components resulted in a drastic enhancement of the mechanical properties. Furthermore, supramolecular reinforcement of CD-PNP hydrogels enabled decoupling of the mechanical properties and material functionality. This allows for modular exchange of structural components from a library of functional polymers and nanoparticles. αCD supramolecular binding motifs are leveraged to form CD-PNP hydrogels with biopolymers for high-fidelity 3D (bio)printing and drug delivery as well as with inorganic NPs to engineer magnetic or conductive materials.
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Affiliation(s)
- Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Elia A Guzzi
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Stéphane Bernhard
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Tim Weber
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Dalia Dranseikiene
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
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Guzzi EA, Bischof R, Dranseikiene D, Deshmukh DV, Wahlsten A, Bovone G, Bernhard S, Tibbitt MW. Hierarchical biomaterials via photopatterning-enhanced direct ink writing. Biofabrication 2021; 13. [PMID: 34433148 DOI: 10.1088/1758-5090/ac212f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/25/2021] [Indexed: 12/16/2022]
Abstract
Recent advances in additive manufacturing (AM) technologies provide tools to fabricate biological structures with complex three-dimensional (3D) organization. Deposition-based approaches have been exploited to manufacture multimaterial constructs. Stimulus-triggered approaches have been used to fabricate scaffolds with high resolution. Both features are useful to produce biomaterials that mimic the hierarchical organization of human tissues. Recently, multitechnology biofabrication approaches have been introduced that integrate benefits from different AM techniques to enable more complex materials design. However, few methods allow for tunable properties at both micro- and macro-scale in materials that are conducive for cell growth. To improve the organization of biofabricated constructs, we integrated direct ink writing (DIW) with digital light processing (DLP) to form multimaterial constructs with improved spatial control over final scaffold mechanics. Polymer-nanoparticle hydrogels were combined with methacryloyl gelatin (GelMA) to engineer dual inks that were compatible with both DIW and DLP. The shear-thinning and self-healing properties of the dual inks enabled extrusion-based 3D printing. The inclusion of GelMA provided a handle for spatiotemporal control of cross-linking with DLP. Exploiting this technique, complex multimaterial constructs were printed with defined mechanical reinforcement. In addition, the multitechnology approach was used to print live cells for biofabrication applications. Overall, the combination of DIW and DLP is a simple and efficient strategy to fabricate hierarchical biomaterials with user-defined control over material properties at both micro- and macro-scale.
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Affiliation(s)
- Elia A Guzzi
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Raffaele Bischof
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Dalia Dranseikiene
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Dhananjay V Deshmukh
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland.,Institute for Mechanical Systems (IMES), Department of Mechanical and Process Engineering, ETH Zurich, Tannenstrasse 3, Zurich 8092, Switzerland
| | - Adam Wahlsten
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Stéphane Bernhard
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland
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Bagni T, Bovone G, Rack A, Mauro D, Barth C, Matera D, Buta F, Senatore C. Machine learning applied to X-ray tomography as a new tool to analyze the voids in RRP Nb 3Sn wires. Sci Rep 2021; 11:7767. [PMID: 33833396 PMCID: PMC8032674 DOI: 10.1038/s41598-021-87475-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Accepted: 03/30/2021] [Indexed: 11/16/2022] Open
Abstract
The electro-mechanical and electro-thermal properties of high-performance Restacked-Rod-Process (RRP) Nb3Sn wires are key factors in the realization of compact magnets above 15 T for the future particle physics experiments. Combining X-ray micro-tomography with unsupervised machine learning algorithm, we provide a new tool capable to study the internal features of RRP wires and unlock different approaches to enhance their performances. Such tool is ideal to characterize the distribution and morphology of the voids that are generated during the heat treatment necessary to form the Nb3Sn superconducting phase. Two different types of voids can be detected in this type of wires: one inside the copper matrix and the other inside the Nb3Sn sub-elements. The former type can be related to Sn leaking from sub-elements to the copper matrix which leads to poor electro-thermal stability of the whole wire. The second type is detrimental for the electro-mechanical performance of the wires as superconducting wires experience large electromagnetic stresses in high field and high current conditions. We analyze these aspects thoroughly and discuss the potential of the X-ray tomography analysis tool to help modeling and predicting electro-mechanical and electro-thermal behavior of RRP wires and optimize their design.
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Affiliation(s)
- T Bagni
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.
| | - G Bovone
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - A Rack
- ESRF - The European Synchrotron, Grenoble, France
| | - D Mauro
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - C Barth
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - D Matera
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - F Buta
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
| | - C Senatore
- Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland
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Bovone G, Dudaryeva OY, Marco-Dufort B, Tibbitt MW. Engineering Hydrogel Adhesion for Biomedical Applications via Chemical Design of the Junction. ACS Biomater Sci Eng 2021; 7:4048-4076. [PMID: 33792286 DOI: 10.1021/acsbiomaterials.0c01677] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Hydrogel adhesion inherently relies on engineering the contact surface at soft and hydrated interfaces. Upon contact, adhesion normally occurs through the formation of chemical or physical interactions between the disparate surfaces. The ability to form these adhesion junctions is challenging for hydrogels as the interfaces are wet and deformable and often contain low densities of functional groups. In this Review, we link the design of the binding chemistries or adhesion junctions, whether covalent, dynamic covalent, supramolecular, or physical, to the emergent adhesive properties of soft and hydrated interfaces. Wet adhesion is useful for bonding to or between tissues and implants for a range of biomedical applications. We highlight several recent and emerging adhesive hydrogels for use in biomedicine in the context of efficient junction design. The main focus is on engineering hydrogel adhesion through molecular design of the junctions to tailor the adhesion strength, reversibility, stability, and response to environmental stimuli.
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Affiliation(s)
- Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Oksana Y Dudaryeva
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Bruno Marco-Dufort
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
| | - Mark W Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland
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Affiliation(s)
- Stéphane Bernhard
- Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich
| | - Giovanni Bovone
- Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich
| | - Elia A. Guzzi
- Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich
| | - Mark W. Tibbitt
- Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich;,
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11
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Bovone G, Steiner F, Guzzi EA, Tibbitt MW. Automated and Continuous Production of Polymeric Nanoparticles. Front Bioeng Biotechnol 2019; 7:423. [PMID: 31921826 PMCID: PMC6927919 DOI: 10.3389/fbioe.2019.00423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 11/29/2019] [Indexed: 01/08/2023] Open
Abstract
Polymeric nanoparticles (NPs) are increasingly used as therapeutics, diagnostics, and building blocks in (bio)materials science. Current barriers to translation are limited control over NP physicochemical properties and robust scale-up of their production. Flow-based devices have emerged for controlled production of polymeric NPs, both for rapid formulation screening (~μg min-1) and on-scale production (~mg min-1). While flow-based devices have improved NP production compared to traditional batch processes, automated processes are desired for robust NP production at scale. Therefore, we engineered an automated coaxial jet mixer (CJM), which controlled the mixing of an organic stream containing block copolymer and an aqueous stream, for the continuous nanoprecipitation of polymeric NPs. The CJM was operated stably under computer control for up to 24 h and automated control over the flow conditions tuned poly(ethylene glycol)-block-polylactide (PEG5K -b-PLA20K ) NP size between ≈56 nm and ≈79 nm. In addition, the automated CJM enabled production of NPs of similar size (D h ≈ 50 nm) from chemically diverse block copolymers, PEG5K -b-PLA20K , PEG-block-poly(lactide-co-glycolide) (PEG5K -b-PLGA20K ), and PEG-block-polycaprolactone (PEG5K -b-PCL20K ), by tuning the flow conditions for each block copolymer. Further, the automated CJM was used to produce model nanotherapeutics in a reproducible manner without user intervention. Finally, NPs produced with the automated CJM were used to scale the formation of injectable polymer-nanoparticle (PNP) hydrogels, without modifying the mechanical properties of the PNP gel. In conclusion, the automated CJM enabled stable, tunable, and continuous production of polymeric NPs, which are needed for the scale-up and translation of this important class of biomaterials.
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Affiliation(s)
| | | | | | - Mark W. Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process Engineering, ETH Zürich, Zurich, Switzerland
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Guzzi EA, Bovone G, Tibbitt MW. Universal Nanocarrier Ink Platform for Biomaterials Additive Manufacturing. Small 2019; 15:e1905421. [PMID: 31762197 DOI: 10.1002/smll.201905421] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 11/02/2019] [Indexed: 06/10/2023]
Abstract
Ink engineering is a fundamental area of research within additive manufacturing (AM) that designs next-generation biomaterials tailored for additive processes. During the design of new inks, specific requirements must be considered, such as flowability, postfabrication stability, biointegration, and controlled release of therapeutic molecules. To date, many (bio)inks have been developed; however, few are sufficiently versatile to address a broad range of applications. In this work, a universal nanocarrier ink platform is presented that provides tailored rheology for extrusion-based AM and facilitates the formulation of biofunctional inks. The universal nanocarrier ink (UNI) leverages reversible polymer-nanoparticle interactions to form a transient physical network with shear-thinning and self-healing properties engineered for direct ink writing (DIW). The unique advantage of the material is that a range of functional secondary polymers can be combined with the UNI to enable stabilization of printed constructs via secondary cross-linking as well as customized biofunctionality for tissue engineering and drug delivery applications. Specific UNI formulations are used for bioprinting of living tissue constructs and DIW of controlled release devices. The robust and versatile nature of the UNI platform enables rapid formulation of a broad range of functional inks for AM of advanced biomaterials.
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Affiliation(s)
- Elia A Guzzi
- Sonneggstrasse 3, ETH Zürich, 8092, Zürich, Switzerland
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Affiliation(s)
- Giovanni Bovone
- Macromolecular Engineering Laboratory, Department of Mechanical and Process EngineeringETH Zürich Zürich 8092 Switzerland
| | - Elia A. Guzzi
- Macromolecular Engineering Laboratory, Department of Mechanical and Process EngineeringETH Zürich Zürich 8092 Switzerland
| | - Mark W. Tibbitt
- Macromolecular Engineering Laboratory, Department of Mechanical and Process EngineeringETH Zürich Zürich 8092 Switzerland
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14
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Bertsch P, Schneider L, Bovone G, Tibbitt MW, Fischer P, Gstöhl S. Injectable Biocompatible Hydrogels from Cellulose Nanocrystals for Locally Targeted Sustained Drug Release. ACS Appl Mater Interfaces 2019; 11:38578-38585. [PMID: 31573787 DOI: 10.1021/acsami.9b15896] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Injectable hydrogels from biocompatible materials are in demand for tissue engineering and drug delivery systems. Here, we produce hydrogels from mere cellulose nanocrystals (CNCs) by salt-induced charge screening. The injectability of CNC hydrogels was assessed by a combination of shear and capillary rheology, revealing that CNC hydrogels are conveyed via plug flow in capillaries allowing injection with minimal impact on mechanical properties. The potential of CNC hydrogels as drug carriers was elaborated by the in vitro release of the model protein bovine serum albumin (BSA), poorly water soluble tetracycline (TC), and readily soluble doxorubicin (DOX) into physiological saline and simulated gastric juice. For TC, a burst release was observed within 2 days, whereas BSA and DOX both showed a sustained release for 2 weeks. Only DOX was released fully from the hydrogels. The different release patterns were attributed to drug size, solubility, and specific drug-CNC interactions. The biocompatibility of CNC hydrogels and maintained bioactivity of released DOX were confirmed in a HeLa cell assay. The drug release was modulated by the incorporation of sucrose or xanthan gum in CNC hydrogels, whereas altering CNC concentration showed minor effects. The release into simulated gastric juice at pH 2 ceased for BSA due to charge inversion and electrostatic complexation, but not for smaller TC. Thus, CNC hydrogels may act as pH-responsive delivery systems that preserve drugs under gastric conditions followed by pH-triggered release in the duodenum.
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