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Nasikas NK, Petousis M, Papadakis V, Argyros A, Valsamos J, Gkagkanatsiou K, Sagris D, David C, Michailidis N, Maravelakis E, Vidakis N. A Comprehensive Optimization Course of Antimony Tin Oxide Nanofiller Loading in Polyamide 12: Printability, Quality Assessment, and Engineering Response in Additive Manufacturing. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1285. [PMID: 39120390 PMCID: PMC11314480 DOI: 10.3390/nano14151285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2024] [Revised: 07/22/2024] [Accepted: 07/28/2024] [Indexed: 08/10/2024]
Abstract
This study aimed to investigate the potential of antimony-doped tin oxide (ATO) as a reinforcing agent for polyamide 12 (PA12) in 3D printing by examining four mixtures with varying ATO concentrations (2.0 to 8.0 wt.%, with a 2.0 wt.% interval). These mixtures were used to fabricate filaments for the manufacturing of specimens through the material extrusion method. The mechanical properties of the resulting PA12/ATO composites and PA12 pure samples were evaluated through tensile, Charpy impact, flexural, and microhardness tests. Additionally, rheology, structure, morphology, thermal properties, pore size, and consistency in the dimensions of the samples were evaluated. Thermogravimetric analysis, along with differential scanning calorimetry, scanning electron microscopy, energy-dispersive and Raman spectroscopy, and micro-computed tomography, were conducted. The results were correlated and interpreted. The greatest reinforcement was achieved with the PA12/ATO 4.0 wt.% mixture, which exhibited a 19.3% increase in tensile strength and an 18.6% increase in flexural strength compared with pure PA12 (the control samples). The Charpy impact strength and microhardness were also improved by more than 10%. These findings indicate the merit of composites with ATO in additive manufacturing, particularly in the production of components with improved mechanical performance.
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Affiliation(s)
- Nektarios K. Nasikas
- Division of Mathematics and Engineering Sciences, Department of Military Sciences, Hellenic Army Academy, Vari, 16673 Athens, Greece;
| | - Markos Petousis
- Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece; (M.P.); (J.V.); (K.G.)
| | - Vassilis Papadakis
- Department of Industrial Design and Production Engineering, University of West Attica, 12243 Athens, Greece;
- Institute of Electronic Structure and Laser, Foundation for Research and Technology-Hellas, N. Plastira 100m, 70013 Heraklion, Greece
| | - Apostolos Argyros
- Physical Metallurgy Laboratory, Mechanical Engineering Department, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.A.); (N.M.)
- Centre for Research & Development of Advanced Materials (CERDAM), Center for Interdisciplinary Research and Innovation, Balkan Centre, Building B’, 10th km Thessaloniki-Thermi Road, 57001 Thessaloniki, Greece
| | - John Valsamos
- Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece; (M.P.); (J.V.); (K.G.)
| | - Katerina Gkagkanatsiou
- Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece; (M.P.); (J.V.); (K.G.)
| | - Dimitrios Sagris
- Department of Mechanical Engineering, International Hellenic University, Serres Campus, 62124 Serres, Greece; (D.S.); (C.D.)
| | - Constantine David
- Department of Mechanical Engineering, International Hellenic University, Serres Campus, 62124 Serres, Greece; (D.S.); (C.D.)
| | - Nikolaos Michailidis
- Physical Metallurgy Laboratory, Mechanical Engineering Department, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (A.A.); (N.M.)
- Centre for Research & Development of Advanced Materials (CERDAM), Center for Interdisciplinary Research and Innovation, Balkan Centre, Building B’, 10th km Thessaloniki-Thermi Road, 57001 Thessaloniki, Greece
| | - Emmanuel Maravelakis
- Department of Electronic Engineering, Hellenic Mediterranean University, 73133 Chania, Greece;
| | - Nectarios Vidakis
- Department of Mechanical Engineering, Hellenic Mediterranean University, 71410 Heraklion, Greece; (M.P.); (J.V.); (K.G.)
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Asciak L, Domingo-Roca R, Dow JR, Brodie R, Paterson N, Riches PE, Shu W, McCormick C. Exploiting light-based 3D-printing for the fabrication of mechanically enhanced, patient-specific aortic grafts. J Mech Behav Biomed Mater 2024; 154:106531. [PMID: 38588633 DOI: 10.1016/j.jmbbm.2024.106531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/10/2024]
Abstract
Despite polyester vascular grafts being routinely used in life-saving aortic aneurysm surgeries, they are less compliant than the healthy, native human aorta. This mismatch in mechanical behaviour has been associated with disruption of haemodynamics contributing to several long-term cardiovascular complications. Moreover, current fabrication approaches mean that opportunities to personalise grafts to the individual anatomical features are limited. Various modifications to graft design have been investigated to overcome such limitations; yet optimal graft functionality remains to be achieved. This study reports on the development and characterisation of an alternative vascular graft material. An alginate:PEGDA (AL:PE) interpenetrating polymer network (IPN) hydrogel has been produced with uniaxial tensile tests revealing similar strength and stiffness (0.39 ± 0.05 MPa and 1.61 ± 0.19 MPa, respectively) to the human aorta. Moreover, AL:PE tubular conduits of similar geometrical dimensions to segments of the aorta were produced, either via conventional moulding methods or stereolithography (SLA) 3D-printing. While both fabrication methods successfully demonstrated AL:PE hydrogel production, SLA 3D-printing was more easily adaptable to the fabrication of complex structures without the need of specific moulds or further post-processing. Additionally, most 3D-printed AL:PE hydrogel tubular conduits sustained, without failure, compression up to 50% their outer diameter and returned to their original shape upon load removal, thereby exhibiting promising behaviour that could withstand pulsatile pressure in vivo. Overall, these results suggest that this AL:PE IPN hydrogel formulation in combination with 3D-printing, has great potential for accelerating progress towards personalised and mechanically-matched aortic grafts.
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Affiliation(s)
- Lisa Asciak
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
| | - Roger Domingo-Roca
- Department of Electronic and Electric Engineering, University of Strathclyde, Glasgow, UK
| | - Jamie R Dow
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK; Research and Development, Terumo Aortic Ltd., Inchinnan, Glasgow, UK
| | - Robbie Brodie
- Research and Development, Terumo Aortic Ltd., Inchinnan, Glasgow, UK
| | - Niall Paterson
- Research and Development, Terumo Aortic Ltd., Inchinnan, Glasgow, UK
| | - Philip E Riches
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
| | - Wenmiao Shu
- Department of Biomedical Engineering, University of Strathclyde, Glasgow, UK
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Guo Z, Ma C, Xie W, Tang A, Liu W. An effective DLP 3D printing strategy of high strength and toughness cellulose hydrogel towards strain sensing. Carbohydr Polym 2023; 315:121006. [PMID: 37230626 DOI: 10.1016/j.carbpol.2023.121006] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/05/2023] [Accepted: 05/08/2023] [Indexed: 05/27/2023]
Abstract
Photocurable 3D printing technology has outperformed extrusion-based 3D printing technology in material adaptability, resolution, and printing rate, yet is still limited by the insecure preparation and selection of photoinitiators and thus less reported. In this work, we developed a printable hydrogel that can effectively facilitate various solid or hollow structures and even lattice structures. The chemical and physical dual-crosslinking strategy combined with cellulose nanofibers (CNF) significantly improved the strength and toughness of photocurable 3D printed hydrogels. In this study, the tensile breaking strength, Young's modulus, and toughness of poly(acrylamide-co-acrylic acid)D/cellulose nanofiber (PAM-co-PAA)D/CNF hydrogels were 375 %, 203 % and 544 % higher than those of the traditional single chemical crosslinked (PAM-co-PAA)S hydrogels, respectively. Notably, its outstanding compressive elasticity enabled it to recover under 90 % strain compression (about 4.12 MPa). Resultantly, the proposed hydrogel can be utilized as a flexible strain sensor to monitor the motions of human movements, such as the bending of fingers, wrists, and arms, and even the vibration of a speaking throat. The output of electrical signals can still be collected through strain even under the condition of energy shortage. In addition, photocurable 3D printing technology can provide customized services for hydrogel-based e-skin, such as hydrogel-based bracelets, fingerstall, and finger joint sleeves.
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Affiliation(s)
- Zhengqiang Guo
- School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road, Tianhe District, 510641 Guangzhou City, PR China
| | - Chengdong Ma
- School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road, Tianhe District, 510641 Guangzhou City, PR China
| | - Weigui Xie
- School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road, Tianhe District, 510641 Guangzhou City, PR China
| | - Aimin Tang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Wushan Road, Tianhe District, 510641 Guangzhou City, PR China
| | - Wangyu Liu
- School of Mechanical and Automotive Engineering, South China University of Technology, Wushan Road, Tianhe District, 510641 Guangzhou City, PR China.
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Additive manufacturing technologies with emphasis on stereolithography 3D printing in pharmaceutical and medical applications: A review. Int J Pharm X 2023; 5:100159. [PMID: 36632068 PMCID: PMC9827389 DOI: 10.1016/j.ijpx.2023.100159] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 12/31/2022] [Accepted: 01/02/2023] [Indexed: 01/04/2023] Open
Abstract
Three-dimensional (3D) printing or Additive Manufacturing (AM) technology is an innovative tool with great potential and diverse applications in various fields. As 3D printing has been burgeoning in recent times, a tremendous transformation can be envisaged in medical care, especially the manufacturing procedures leading to personalized medicine. Stereolithography (SLA), a vat-photopolymerization technique, that uses a laser beam, is known for its ability to fabricate complex 3D structures ranging from micron-size needles to life-size organs, because of its high resolution, precision, accuracy, and speed. This review presents a glimpse of varied 3D printing techniques, mainly expounding SLA in terms of the materials used, the orientation of printing, and the working mechanisms. The previous works that focused on developing pharmaceutical dosage forms, drug-eluting devices, and tissue scaffolds are presented in this paper, followed by the challenges associated with SLA from an industrial and regulatory perspective. Due to its excellent advantages, this technology could transform the conventional "one dose fits all" concept to bring digitalized patient-centric medication into reality.
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Moon SH, Choi HN, Yang YJ. Natural/Synthetic Polymer Materials for Bioink Development. BIOTECHNOL BIOPROC E 2022. [DOI: 10.1007/s12257-021-0418-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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6
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Palucci Rosa R, Rosace G, Arrigo R, Malucelli G. Preparation and Characterization of 3D-Printed Biobased Composites Containing Micro- or Nanocrystalline Cellulose. Polymers (Basel) 2022; 14:polym14091886. [PMID: 35567055 PMCID: PMC9105471 DOI: 10.3390/polym14091886] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 04/28/2022] [Accepted: 05/01/2022] [Indexed: 01/27/2023] Open
Abstract
Stereolithography (SLA), one of the seven different 3D printing technologies, uses photosensitive resins to create high-resolution parts. Although SLA offers many advantages for medical applications, the lack of biocompatible and biobased resins limits its utilization. Thus, the development of new materials is essential. This work aims at designing, developing, and fully characterizing a bio-resin system (made of poly(ethylene glycol) diacrylate (PEGDA) and acrylated epoxidized soybean oil (AESO)), filled with micro- or nanocellulose crystals (MCC and CNC), suitable for 3D printing. The unfilled resin system containing 80 wt.% AESO was identified as the best resin mixture, having a biobased content of 68.8%, while ensuring viscosity values suitable for the 3D printing process (>1.5 Pa s). The printed samples showed a 93% swelling decrease in water, as well as increased tensile strength (4.4 ± 0.2 MPa) and elongation at break (25% ± 2.3%). Furthermore, the incorporation of MCC and CNC remarkably increased the tensile strength and Young’s modulus of the cured network, thus indicating a strong reinforcing effect exerted by the fillers. Lastly, the presence of the fillers did not affect the UV-light penetration, and the printed parts showed a high quality, thus proving their potential for precise applications.
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Affiliation(s)
- Raphael Palucci Rosa
- Department of Engineering and Applied Sciences, University of Bergamo, Viale Marconi 5, Dalmine, 24044 Bergamo, Italy
- Correspondence:
| | - Giuseppe Rosace
- Department of Engineering and Applied Sciences, University of Bergamo, Local INSTM Unit, Viale Marconi 5, Dalmine, 24044 Bergamo, Italy;
| | - Rossella Arrigo
- Department of Applied Science and Technology, Politecnico di Torino, Local INSTM Unit, Viale T. Michel 5, Provincia di Alessandria, 15121 Alessandria, Italy; (R.A.); (G.M.)
| | - Giulio Malucelli
- Department of Applied Science and Technology, Politecnico di Torino, Local INSTM Unit, Viale T. Michel 5, Provincia di Alessandria, 15121 Alessandria, Italy; (R.A.); (G.M.)
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7
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Kim S, Lee H, Choi H, Yoo KY, Yoon H. Investigation on photopolymerization of PEGDA to fabricate high-aspect-ratio microneedles. RSC Adv 2022; 12:9550-9555. [PMID: 35424926 PMCID: PMC8985357 DOI: 10.1039/d2ra00189f] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/17/2022] [Indexed: 12/25/2022] Open
Abstract
Microneedles (MNs) are micron-sized needles that can penetrate the stratum corneum, enabling the non-invasive and painless administration of drugs and vaccines. In this work, fabrication conditions for high-aspect-ratio MNs by the photopolymerization of polyethylene glycol diacrylate (PEGDA) were investigated. Ultraviolet (UV) light was used to crosslink photocurable prepolymers in specific areas defined by a photomask. The aspect ratio of solidified MNs is too small to penetrate the stratum corneum if the degree of polymerization is insufficient. However, if the degree of polymerization is too high, a film is formed between the MNs by solidification of an undesired area owing to the scattering effect, reducing needle height. The influence of prepolymer molecular weight and the degree of UV absorption by the photoinitiator (PI) were studied to optimize the conditions for obtaining high-aspect-ratio MNs. Additionally, the effect of spacing ratio on high-aspect-ratio MNs without film formation has been discussed. A penetration test was conducted with porcine skin to analyze the effect of mechanical properties of MN. This study could guide the fabrication of MNs by the photopolymerization of biocompatible polymers with a photomask. Fabrication conditions for high-aspect-ratio MNs by the photopolymerization of PEGDA were investigated. The influence of prepolymer molecular weight and the degree of UV absorption by the photoinitiator (PI) were studied to optimize the conditions.![]()
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Affiliation(s)
- Sohyun Kim
- Department of Nano Bio Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea
| | - Hyemin Lee
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea
| | - Hyewon Choi
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea
| | - Kee-Youn Yoo
- Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea
| | - Hyunsik Yoon
- Department of Nano Bio Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea .,Department of Chemical & Biomolecular Engineering, Seoul National University of Science and Technology Seoul 01811 Republic of Korea
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8
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Tenje M, Cantoni F, Porras Hernández AM, Searle SS, Johansson S, Barbe L, Antfolk M, Pohlit H. A practical guide to microfabrication and patterning of hydrogels for biomimetic cell culture scaffolds. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.ooc.2020.100003] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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9
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Zhu H, Yang H, Ma Y, Lu TJ, Xu F, Genin GM, Lin M. Spatiotemporally Controlled Photoresponsive Hydrogels: Design and Predictive Modeling from Processing through Application. ADVANCED FUNCTIONAL MATERIALS 2020; 30:2000639. [PMID: 32802013 PMCID: PMC7418561 DOI: 10.1002/adfm.202000639] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/16/2020] [Indexed: 05/16/2023]
Abstract
Photoresponsive hydrogels (PRHs) are soft materials whose mechanical and chemical properties can be tuned spatially and temporally with relative ease. Both photo-crosslinkable and photodegradable hydrogels find utility in a range of biomedical applications that require tissue-like properties or programmable responses. Progress in engineering with PRHs is facilitated by the development of theoretical tools that enable optimization of their photochemistry, polymer matrices, nanofillers, and architecture. This review brings together models and design principles that enable key applications of PRHs in tissue engineering, drug delivery, and soft robotics, and highlights ongoing challenges in both modeling and application.
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Affiliation(s)
- Hongyuan Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an710049P. R. China
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
| | - Haiqian Yang
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
| | - Yufei Ma
- The Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an710049P. R. China
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
| | - Tian Jian Lu
- State Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjing210016P. R. China
- MOE Key Laboratory for Multifunctional Materials and StructuresXi'an Jiaotong UniversityXi'an710049P. R. China
| | - Feng Xu
- The Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an710049P. R. China
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
| | - Guy M. Genin
- The Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an710049P. R. China
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
- Department of Mechanical Engineering & Materials ScienceWashington University in St. LouisSt. LouisMO63130USA
- NSF Science and Technology Center for Engineering MechanobiologyWashington University in St. LouisSt. LouisMO63130USA
| | - Min Lin
- The Key Laboratory of Biomedical Information Engineering of Ministry of EducationSchool of Life Science and TechnologyXi'an Jiaotong UniversityXi'an710049P. R. China
- Bioinspired Engineering & Biomechanics Center (BEBC)Xi'an Jiaotong UniversityXi'an710049P. R. China
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10
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Houck HA, Müller P, Wegener M, Barner-Kowollik C, Du Prez FE, Blasco E. Shining Light on Poly(ethylene glycol): From Polymer Modification to 3D Laser Printing of Water Erasable Microstructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2003060. [PMID: 32644269 DOI: 10.1002/adma.202003060] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/05/2020] [Indexed: 06/11/2023]
Abstract
The implementation of stimuli-responsive bonds into 3D network assemblies is a key concept to design adaptive materials that can reshape and degrade. Here, a straightforward but unique photoresist is introduced for the tailored fabrication of poly(ethylene glycol) (PEG) materials that can be readily erased by water, even without the need for acidic or basic additives. Specifically, a new class of photoresist is developed that operates through the backbone crosslinking of PEG when irradiated in the presence of a bivalent triazolinedione. Hence, macroscopic gels are obtained upon visible light-emitting diode irradiation (λ > 515 nm) that are stable in organic media but rapidly degrade upon the addition of water. Photoinduced curing is also applicable to multiphoton laser lithography (λ > 700 nm), hence providing access to 3D printed microstructures that vanish when immersed in water at 37 °C. Materials with varying crosslinking densities are accessed by adapting the applied laser writing power, thereby allowing for tunable hydrolytic erasing timescales. A new platform technology is thus presented that enables the crosslinking and 3D laser printing of PEG-based materials, which can be cleaved and erased in water, and additionally holds potential for the facile modification and backbone degradation of polyether-containing materials in general.
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Affiliation(s)
- Hannes A Houck
- Polymer Chemistry Research Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4-bis, Gent, 9000, Belgium
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia
- Macromolecular Architectures, Institute for Technical Chemistry and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstraße 18, Karlsruhe, 76131, Germany
| | - Patrick Müller
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131, Germany
| | - Martin Wegener
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
- Institute of Applied Physics (APH), Karlsruhe Institute of Technology (KIT), Karlsruhe, 76131, Germany
| | - Christopher Barner-Kowollik
- Centre for Materials Science, School of Chemistry and Physics, Queensland University of Technology (QUT), 2 George Street, Brisbane, QLD, 4000, Australia
- Macromolecular Architectures, Institute for Technical Chemistry and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstraße 18, Karlsruhe, 76131, Germany
| | - Filip E Du Prez
- Polymer Chemistry Research Group, Centre of Macromolecular Chemistry (CMaC), Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4-bis, Gent, 9000, Belgium
| | - Eva Blasco
- Macromolecular Architectures, Institute for Technical Chemistry and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Engesserstraße 18, Karlsruhe, 76131, Germany
- Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, Eggenstein-Leopoldshafen, 76344, Germany
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11
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Wang YL, Li D. Creating Complex Polyacrylamide Hydrogel Structures Using 3D Printing with Applications to Mechanobiology. Macromol Biosci 2020; 20:e2000082. [PMID: 32558163 PMCID: PMC7482135 DOI: 10.1002/mabi.202000082] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 05/06/2020] [Indexed: 12/22/2022]
Abstract
Due to its favorable physical and chemical properties, including chemical inertness, low fouling by biological molecules, high porosity and permeability, optical transparency, and adjustable elasticity, polyacrylamide has found a wide range of biomedical and non-biomedical applications. To further increase its versatility, this communication describes a simple method, using readily available reagents and equipment, for 3D printing polyacrylamide hydrogels at a resolution of 100-150 μm to create complex structures. As a demonstration of the application, the method is used for creating a lab-on-a-chip cell culture surface with micropatterned stiffness, which then leads to the discovery of stiffness-guided collective cell segregation distinct from durotaxis. The present technology is expected to unleash new applications such as the construction of biocompatible elastic medical devices and artificial organs.
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Affiliation(s)
- Yu-Li Wang
- Department of Biomedical Engineering, Scott Hall 4N209, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
| | - David Li
- Department of Biomedical Engineering, Scott Hall 4N209, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA, 15213, USA
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12
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Crowe JA, El-Tamer A, Nagel D, Koroleva AV, Madrid-Wolff J, Olarte OE, Sokolovsky S, Estevez-Priego E, Ludl AA, Soriano J, Loza-Alvarez P, Chichkov BN, Hill EJ, Parri HR, Rafailov EU. Development of two-photon polymerised scaffolds for optical interrogation and neurite guidance of human iPSC-derived cortical neuronal networks. LAB ON A CHIP 2020; 20:1792-1806. [PMID: 32314760 DOI: 10.1039/c9lc01209e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Recent progress in the field of human induced pluripotent stem cells (iPSCs) has led to the efficient production of human neuronal cell models for in vitro study. This has the potential to enable the understanding of live human cellular and network function which is otherwise not possible. However, a major challenge is the generation of reproducible neural networks together with the ability to interrogate and record at the single cell level. A promising aid is the use of biomaterial scaffolds that would enable the development and guidance of neuronal networks in physiologically relevant architectures and dimensionality. The optimal scaffold material would need to be precisely fabricated with submicron resolution, be optically transparent, and biocompatible. Two-photon polymerisation (2PP) enables precise microfabrication of three-dimensional structures. In this study, we report the identification of two biomaterials that support the growth and differentiation of human iPSC-derived neural progenitors into functional neuronal networks. Furthermore, these materials can be patterned to induce alignment of neuronal processes and enable the optical interrogation of individual cells. 2PP scaffolds with tailored topographies therefore provide an effective method of producing defined in vitro human neural networks for application in influencing neurite guidance and complex network activity.
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Affiliation(s)
- J A Crowe
- School of Life and Health Sciences, Aston University, B4 7ET Birmingham, UK.
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13
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Zhang L, Zuo X, Li S, Sun M, Xie H, Zhang K, Zhou J, Che L, Ma J, Jia Z, Yang F. Synergistic therapy of magnetism-responsive hydrogel for soft tissue injuries. Bioact Mater 2019; 4:160-166. [PMID: 31016272 PMCID: PMC6465584 DOI: 10.1016/j.bioactmat.2019.03.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 03/24/2019] [Accepted: 03/25/2019] [Indexed: 12/21/2022] Open
Abstract
Soft tissue injury is very common and associated with pain, tissue swelling and even malformation if not treated on time. Treating methods include cryotherapy, electrical therapy, ultrasound therapy and anti-inflammatory drug, but none of them is completely satisfying. In this work, for a better therapeutic effect, drug therapy and pulsed electromagnetic field (PEMF) therapy were combined. We constructed a drug delivery system using the tetra-PEG/agar hydrogel (PA). By incorporating Fe3O4 NPs into the hydrogel network, a magnetism-responsive property was achieved in the system. The cytotoxicity and in vivo study showed a good biocompatibility of the PA/Fe3O4 hydrogel. A magnetism-controlled release was attained by the incorporation of Fe3O4. Finally, in vivo study showed a better performance of the DS-loaded PA/Fe3O4 compared with the commercially available DS ointment regarding the recovery of the injured soft tissue. Therefore, this magnetism-responsive hydrogel may represent a promising alternative to treat soft tissue injury.
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Affiliation(s)
- Lining Zhang
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Xiuqin Zuo
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Shengjie Li
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Mi Sun
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics & Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Huimin Xie
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Kai Zhang
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Jikun Zhou
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Liyun Che
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Junxuan Ma
- Orthopedic Research Institute, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Orthopedics and Traumatology, Guangzhou, China
| | - Zishan Jia
- Rehabilitation Medicine Department, PLA General Hospital, Beijing, 100853, China
| | - Fei Yang
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics & Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
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14
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Park S, Park HH, Sun K, Gwon Y, Seong M, Kim S, Park TE, Hyun H, Choung YH, Kim J, Jeong HE. Hydrogel Nanospike Patch as a Flexible Anti-Pathogenic Scaffold for Regulating Stem Cell Behavior. ACS NANO 2019; 13:11181-11193. [PMID: 31518110 DOI: 10.1021/acsnano.9b04109] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Vertically aligned nanomaterials, such as nanowires and nanoneedles, hold strong potential as efficient platforms onto which living cells or tissues can be interfaced for use in advanced biomedical applications. However, their rigid mechanical properties and complex fabrication processes hinder their integration onto flexible, tissue-adaptable, and large-area patch-type scaffolds, limiting their practical applications. In this study, we present a highly flexible patch that possesses a spiky hydrogel nanostructure array as a transplantable platform for enhancing the growth and differentiation of stem cells and efficiently suppressing biofilm formation. In vitro studies show that the hydrogel nanospike patch imposes a strong physical stimulus to the membranes of stem cells and enhances their osteogenic, chondrogenic, and adipogenic differentiation and the secretion of crucial soluble factors without altering cell viability. At the same time, the array exhibits effective bactericidal properties against Gram-positive and Gram-negative bacteria. In vivo studies further demonstrate that the flexible hydrogel patch with its spiky vertical nanostructures significantly promotes the regeneration of damaged cranial bone tissues while suppressing pathogenic bacterial infections in mouse models.
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Affiliation(s)
- Sunho Park
- Department of Rural and Biosystems Engineering , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Hyun-Ha Park
- Department of Mechanical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Kahyun Sun
- Department of Mechanical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Yonghyun Gwon
- Department of Rural and Biosystems Engineering , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Minho Seong
- Department of Mechanical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Sujin Kim
- Department of Rural and Biosystems Engineering , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Tae-Eun Park
- School of Life Science , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Hoon Hyun
- Department of Biomedical Sciences , Chonnam National University Medical School , Gwangju 61469 , Republic of Korea
| | - Yun-Hoon Choung
- Department of Otolaryngology , Ajou University School of Medicine , Suwon 16499 , Republic of Korea
| | - Jangho Kim
- Department of Rural and Biosystems Engineering , Chonnam National University , Gwangju 61186 , Republic of Korea
| | - Hoon Eui Jeong
- Department of Mechanical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
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15
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Diaz-Rodriguez P, Erndt-Marino JD, Gharat T, Munoz Pinto DJ, Samavedi S, Bearden R, Grunlan MA, Saunders WB, Hahn MS. Toward zonally tailored scaffolds for osteochondral differentiation of synovial mesenchymal stem cells. J Biomed Mater Res B Appl Biomater 2019; 107:2019-2029. [PMID: 30549205 PMCID: PMC6934364 DOI: 10.1002/jbm.b.34293] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 10/22/2018] [Accepted: 11/10/2018] [Indexed: 12/15/2022]
Abstract
Synovium-derived mesenchymal stem cells (SMSCs) are an emerging cell source for regenerative medicine applications, including osteochondral defect (OCD) repair. However, in contrast to bone marrow MSCs, scaffold compositions which promote SMSC chondrogenesis/osteogenesis are still being identified. In the present manuscript, we examine poly(ethylene) glycol (PEG)-based scaffolds containing zonally-specific biochemical cues to guide SMSC osteochondral differentiation. Specifically, SMSCs were encapsulated in PEG-based scaffolds incorporating glycosaminoglycans (hyaluronan or chondroitin-6-sulfate [CSC]), low-dose of chondrogenic and osteogenic growth factors (TGFβ1 and BMP2, respectively), or osteoinductive poly(dimethylsiloxane) (PDMS). Initial studies suggested that PEG-CSC-TGFβ1 scaffolds promoted enhanced SMSC chondrogenic differentiation, as assessed by significant increases in Sox9 and aggrecan. Conversely, PEG-PDMS-BMP2 scaffolds stimulated increased levels of osteoblastic markers with significant mineral deposition. A "Transition" zone formulation was then developed containing a graded mixture of the chondrogenic and osteogenic signals present in the PEG-CSC-TGFβ1 and PEG-PDMS-BMP2 constructs. SMSCs within the "Transition" formulation displayed a phenotypic profile similar to hypertrophic chondrocytes, with the highest expression of collagen X, intermediate levels of osteopontin, and mineralization levels equivalent to "bone" formulations. Overall, these results suggest that a graded transition from PEG-CSC-TGFβ1 to PEG-PDMS-BMP2 scaffolds elicits a gradual SMSC phenotypic shift from chondrocyte to hypertrophic chondrocyte to osteoblast-like. As such, further development of these scaffold formulations for use in SMSC-based OCD repair is warranted. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 2019-2029, 2019.
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Affiliation(s)
| | - Josh D Erndt-Marino
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York
| | - Tanmay Gharat
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York
| | - Dany J Munoz Pinto
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York
| | - Satyavrata Samavedi
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, New York
| | - Robert Bearden
- Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas
| | - W Brian Saunders
- Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas
| | - Mariah S Hahn
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, New York
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16
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Park S, Smallwood AM, Ryu CY. Mechanical and Thermal Properties of 3D-Printed Thermosets by Stereolithography. J PHOTOPOLYM SCI TEC 2019. [DOI: 10.2494/photopolymer.32.227] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sungmin Park
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute
| | - Anna M. Smallwood
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute
| | - Chang Y. Ryu
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute
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17
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Benjamin AD, Abbasi R, Owens M, Olsen RJ, Walsh DJ, LeFevre TB, Wilking JN. Light-based 3D printing of hydrogels with high-resolution channels. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/aad667] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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18
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Navarro J, Swayambunathan J, Lerman M, Santoro M, Fisher JP. Development of keratin-based membranes for potential use in skin repair. Acta Biomater 2019; 83:177-188. [PMID: 30342286 DOI: 10.1016/j.actbio.2018.10.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 10/11/2018] [Accepted: 10/16/2018] [Indexed: 12/22/2022]
Abstract
The layers in skin determine its protective and hemostasis functions. This layered microstructure cannot be naturally regenerated after severe burns; we aim to reconstruct it using guided tissue regeneration (GTR). In GTR, a membrane is used to regulate tissue growth by stopping fast-proliferating cells and allowing slower cells to migrate and reconstruct specialized microstructures. Here, we proposed the use of keratin membranes crosslinked via dityrosine bonding. Variables from the crosslinking process were grouped within an energy density (ED) parameter to manufacture and evaluate the membranes. Sol fraction, spectrographs, and thermograms were used to quantify the non-linear relation between ED and the resulting crosslinking degree (CD). Mechanical and swelling properties increased until an ED threshold was reached; at higher ED, the CD and properties of the membranes remained invariable indicating that all possible dityrosine bonds were formed. Transport assays showed that the membranes allow molecular diffusion; low ED membranes retain solutes within their structure while the high ED samples allow higher transport rates indicating that uncrosslinked proteins can be responsible of reducing transport. This was confirmed with lower transport of adipogenic growth factors to stem cells when using low ED membranes; high ED samples resulted in increased production of intracellular lipids. Overall, we can engineer keratin membranes with specific CD, a valuable tool to tune microstructural and transport properties.
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Affiliation(s)
- Javier Navarro
- Fischell Department of Bioengineering, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States; Center for Engineering Complex Tissues, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States
| | - Jay Swayambunathan
- Fischell Department of Bioengineering, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States; Center for Engineering Complex Tissues, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States
| | - Max Lerman
- Fischell Department of Bioengineering, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States; Center for Engineering Complex Tissues, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States
| | - Marco Santoro
- Fischell Department of Bioengineering, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States; Center for Engineering Complex Tissues, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States.
| | - John P Fisher
- Fischell Department of Bioengineering, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States; Center for Engineering Complex Tissues, University of Maryland, 3121 A. James Clark Hall, College Park, MD 20742, United States.
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19
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Zheng Z, Wu J, Liu M, Wang H, Li C, Rodriguez MJ, Li G, Wang X, Kaplan DL. 3D Bioprinting of Self-Standing Silk-Based Bioink. Adv Healthc Mater 2018; 7:e1701026. [PMID: 29292585 DOI: 10.1002/adhm.201701026] [Citation(s) in RCA: 126] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 11/11/2017] [Indexed: 01/19/2023]
Abstract
Silk/polyethylene glycol (PEG) hydrogels are studied as self-standing bioinks for 3D printing for tissue engineering. The two components of the bioink, silk fibroin protein (silk) and PEG, are both Food and Drug Administration approved materials in drug and medical device products. Mixing PEG with silk induces silk β-sheet structure formation and thus gelation and water insolubility due to physical crosslinking. A variety of constructs with high resolution, high shape fidelity, and homogeneous gel matrices are printed. When human bone marrow mesenchymal stem cells are premixed with the silk solution prior to printing and the constructs are cultured in this medium, the cell-loaded constructs maintain their shape over at least 12 weeks. Interestingly, the cells grow faster in the higher silk concentration (10%, w/v) gel than in lower ones (7.5 and 5%, w/v), likely due to the difference in material stiffness and the amount of residual PEG remaining in the gel related to material hydrophobicity. Subcutaneous implantation of 7.5% (w/v) bioink gels with and without printed fibroblast cells in mice reveals that the cells survive and proliferate in the gel matrix for at least 6 week postimplantation. The results suggest that these silk/PEG bioink gels may provide suitable scaffold environments for cell printing and function.
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Affiliation(s)
- Zhaozhu Zheng
- National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 People's Republic of China
| | - Jianbing Wu
- National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 People's Republic of China
| | - Meng Liu
- The Cyrus Tang Hematology Center Soochow University Suzhou 215123 People's Republic of China
| | - Heng Wang
- National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 People's Republic of China
| | - Chunmei Li
- Department of Biomedical Engineering Tufts University 4 Colby Street Medford MA 02155 USA
| | - María J. Rodriguez
- Department of Biomedical Engineering Tufts University 4 Colby Street Medford MA 02155 USA
| | - Gang Li
- National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 People's Republic of China
| | - Xiaoqin Wang
- National Engineering Laboratory for Modern Silk College of Textile and Clothing Engineering Soochow University Suzhou 215123 People's Republic of China
| | - David L. Kaplan
- Department of Biomedical Engineering Tufts University 4 Colby Street Medford MA 02155 USA
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