601
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Munro NH, McGrath KM. Advances in techniques and technologies for bone implants. BIOINSPIRED BIOMIMETIC AND NANOBIOMATERIALS 2015. [DOI: 10.1680/bbn.14.00015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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602
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Lode A, Krujatz F, Brüggemeier S, Quade M, Schütz K, Knaack S, Weber J, Bley T, Gelinsky M. Green bioprinting: Fabrication of photosynthetic algae-laden hydrogel scaffolds for biotechnological and medical applications. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400205] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Anja Lode
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
| | - Felix Krujatz
- Institute of Food Technology and Bioprocess Engineering; Technische Universität Dresden; Dresden Germany
| | - Sophie Brüggemeier
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
| | - Mandy Quade
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
| | - Kathleen Schütz
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
| | - Sven Knaack
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
| | - Jost Weber
- Institute of Food Technology and Bioprocess Engineering; Technische Universität Dresden; Dresden Germany
| | - Thomas Bley
- Institute of Food Technology and Bioprocess Engineering; Technische Universität Dresden; Dresden Germany
| | - Michael Gelinsky
- Centre for Translational Bone; Joint and Soft Tissue Research; University Hospital and Faculty of Medicine Carl Gustav Carus of Technische Universität Dresden; Dresden Germany
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603
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Kim YB, Kim GH. PCL/alginate composite scaffolds for hard tissue engineering: fabrication, characterization, and cellular activities. ACS COMBINATORIAL SCIENCE 2015; 17:87-99. [PMID: 25541639 DOI: 10.1021/co500033h] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Alginates have been used widely in biomedical applications because of good biocompatibility, low cost, and rapid gelation in the presence of calcium ions. However, poor mechanical properties and fabrication-ability for three-dimensional shapes have been obstacles in hard-tissue engineering applications. To overcome these shortcomings of alginates, we suggest a new composite system, consisting of a synthetic polymer, poly(ε-caprolactone), and various weight fractions (10-40 wt %) of alginate. The fabricated composite scaffolds displayed a multilayered 3D structure, consisting of microsized composite struts, and they provided a 100% offset for each layer. To show the feasibility of the scaffold for hard tissue regeneration, the composite scaffolds fabricated were assessed not only for physical properties, including surface roughness, tensile strength, and water absorption and wetting, but also in vitro osteoblastic cellular responses (cell-seeding efficiency, cell viability, fluorescence analyses, alkaline phosphatase (ALP) activity, and mineralization) by culturing with preosteoblasts (MC3T3-E1). Due to the alginate components in the composites, the scaffolds showed significantly enhanced wetting behavior, water-absorption (∼12-fold), and meaningful biological activities (∼2.1-fold for cell-seeding efficiency, ∼2.5-fold for cell-viability at 7 days, ∼3.4-fold for calcium deposition), compared with a pure PCL scaffold.
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Affiliation(s)
- Yong Bok Kim
- Department
of Biomechatronic
Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 110-745, South Korea
| | - Geun Hyung Kim
- Department
of Biomechatronic
Engineering, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon 110-745, South Korea
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604
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605
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Akbarzadeh R, Minton JA, Janney CS, Smith TA, James PF, Yousefi AM. Hierarchical polymeric scaffolds support the growth of MC3T3-E1 cells. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:116. [PMID: 25665851 DOI: 10.1007/s10856-015-5453-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2014] [Accepted: 12/14/2014] [Indexed: 06/04/2023]
Abstract
Tissue engineering makes use of the principles of biology and engineering to sustain 3D cell growth and promote tissue repair and/or regeneration. In this study, macro/microporous scaffold architectures have been developed using a hybrid solid freeform fabrication/thermally induced phase separation (TIPS) technique. Poly(lactic-co-glycolic acid) (PLGA) dissolved in 1,4-dioxane was used to generate a microporous matrix by the TIPS method. The 3D-bioplotting technique was used to fabricate 3D macroporous constructs made of polyethylene glycol (PEG). Embedding the PEG constructs inside the PLGA solution prior to the TIPS process and subsequent extraction of PEG following solvent removal (1,4-dioaxane) resulted in a macro/microporous structure. These hierarchical scaffolds with a bimodal pore size distribution (<50 and >300 μm) contained orthogonally interconnected macro-channels generated by the extracted PEG. The diameter of the macro-channels was varied by tuning the dispensing parameters of the 3D bioplotter. The in vitro cell culture using murine MC3T3-E1 cell line for 21 days demonstrated that these scaffolds could provide a favorable environment to support cell adhesion and growth.
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Affiliation(s)
- Rosa Akbarzadeh
- Department of Chemical, Paper and Biomedical Engineering, Miami University, 650 E High Street, Oxford, OH, 45056, USA
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606
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Song BR, Yang SS, Jin H, Lee SH, Park DY, Lee JH, Park SR, Park SH, Min BH. Three dimensional plotted extracellular matrix scaffolds using a rapid prototyping for tissue engineering application. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-015-0107-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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607
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Yanagawa F, Sugiura S, Takagi T, Sumaru K, Camci-Unal G, Patel A, Khademhosseini A, Kanamori T. Activated-ester-type photocleavable crosslinker for preparation of photodegradable hydrogels using a two-component mixing reaction. Adv Healthc Mater 2015; 4:246-54. [PMID: 25116476 DOI: 10.1002/adhm.201400180] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 07/09/2014] [Indexed: 01/22/2023]
Abstract
Photodegradable hydrogels have emerged as powerful platforms for studying and directing cellular behavior in a spatiotemporally controlled manner. Photodegradable hydrogels have previously been formed by free radical polymerizations, Michael-type addition reactions, and orthogonal click reactions. Here, an ester-activated photocleavable crosslinker is presented for preparing photodegradable hydrogels by means of a one-step mixing reaction between the crosslinker and a biocompatible polymer containing amino moieties (amino-terminated tetra-arm poly(ethylene glycol) or gelatin). It is demonstrated that photodegradable hydrogels micropatterned by photolithography can be used to culture cells with high viability and proliferation rates. The resulting micropatterned cell-laden structures can potentially be used to create 3D biomaterials for various tissue-engineering applications.
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Affiliation(s)
- Fumiki Yanagawa
- Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Central 5th, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Shinji Sugiura
- Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Central 5th, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Toshiyuki Takagi
- Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Central 5th, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Kimio Sumaru
- Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Central 5th, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
| | - Gulden Camci-Unal
- Biomaterials Innovation Research Center Division of Biomedical Engineering; Department of Medicine; Brigham and Women's Hospital; Harvard Medical School; Cambridge MA 02139 USA
- Harvard-MIT Division of Health Sciences and Technology; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Alpesh Patel
- Biomaterials Innovation Research Center Division of Biomedical Engineering; Department of Medicine; Brigham and Women's Hospital; Harvard Medical School; Cambridge MA 02139 USA
- Harvard-MIT Division of Health Sciences and Technology; Massachusetts Institute of Technology; Cambridge MA 02139 USA
| | - Ali Khademhosseini
- Biomaterials Innovation Research Center Division of Biomedical Engineering; Department of Medicine; Brigham and Women's Hospital; Harvard Medical School; Cambridge MA 02139 USA
- Harvard-MIT Division of Health Sciences and Technology; Massachusetts Institute of Technology; Cambridge MA 02139 USA
- Wyss Institute for Biologically Inspired Engineering; Harvard University; Boston MA 02115 USA
- Department of Maxillofacial Biomedical Engineering and Institute of Oral Biology; School of Dentistry, Kyung Hee University; Seoul 130-701 Republic of Korea
- Department of Physics; King Abdulaziz University; Jeddah 21569 Saudi Arabia
| | - Toshiyuki Kanamori
- Research Center for Stem Cell Engineering; National Institute of Advanced Industrial Science and Technology (AIST); Central 5th, 1-1-1 Higashi Tsukuba Ibaraki 305-8565 Japan
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608
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Rimann M, Bono E, Annaheim H, Bleisch M, Graf-Hausner U. Standardized 3D Bioprinting of Soft Tissue Models with Human Primary Cells. ACTA ACUST UNITED AC 2015; 21:496-509. [PMID: 25609254 DOI: 10.1177/2211068214567146] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Indexed: 12/22/2022]
Abstract
Cells grown in 3D are more physiologically relevant than cells cultured in 2D. To use 3D models in substance testing and regenerative medicine, reproducibility and standardization are important. Bioprinting offers not only automated standardizable processes but also the production of complex tissue-like structures in an additive manner. We developed an all-in-one bioprinting solution to produce soft tissue models. The holistic approach included (1) a bioprinter in a sterile environment, (2) a light-induced bioink polymerization unit, (3) a user-friendly software, (4) the capability to print in standard labware for high-throughput screening, (5) cell-compatible inkjet-based printheads, (6) a cell-compatible ready-to-use BioInk, and (7) standard operating procedures. In a proof-of-concept study, skin as a reference soft tissue model was printed. To produce dermal equivalents, primary human dermal fibroblasts were printed in alternating layers with BioInk and cultured for up to 7 weeks. During long-term cultures, the models were remodeled and fully populated with viable and spreaded fibroblasts. Primary human dermal keratinocytes were seeded on top of dermal equivalents, and epidermis-like structures were formed as verified with hematoxylin and eosin staining and immunostaining. However, a fully stratified epidermis was not achieved. Nevertheless, this is one of the first reports of an integrative bioprinting strategy for industrial routine application.
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Affiliation(s)
- Markus Rimann
- Institute of Chemistry and Biological Chemistry (ICBC), Zurich University of Applied Sciences (ZHAW), Waedenswil, Switzerland
| | - Epifania Bono
- Institute of Chemistry and Biological Chemistry (ICBC), Zurich University of Applied Sciences (ZHAW), Waedenswil, Switzerland
| | - Helene Annaheim
- Institute of Chemistry and Biological Chemistry (ICBC), Zurich University of Applied Sciences (ZHAW), Waedenswil, Switzerland
| | - Matthias Bleisch
- Institute of Chemistry and Biological Chemistry (ICBC), Zurich University of Applied Sciences (ZHAW), Waedenswil, Switzerland
| | - Ursula Graf-Hausner
- Institute of Chemistry and Biological Chemistry (ICBC), Zurich University of Applied Sciences (ZHAW), Waedenswil, Switzerland
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609
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Peterson GI, Larsen MB, Ganter MA, Storti DW, Boydston AJ. 3D-printed mechanochromic materials. ACS APPLIED MATERIALS & INTERFACES 2015; 7:577-83. [PMID: 25478746 DOI: 10.1021/am506745m] [Citation(s) in RCA: 140] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We describe the preparation and characterization of photo- and mechanochromic 3D-printed structures using a commercial fused filament fabrication printer. Three spiropyran-containing poly(ε-caprolactone) (PCL) polymers were each filamentized and used to print single- and multicomponent tensile testing specimens that would be difficult, if not impossible, to prepare using traditional manufacturing techniques. It was determined that the filament production and printing process did not degrade the spiropyran units or polymer chains and that the mechanical properties of the specimens prepared with the custom filament were in good agreement with those from commercial PCL filament. In addition to printing photochromic and dual photo- and mechanochromic PCL materials, we also prepare PCL containing a spiropyran unit that is selectively activated by mechanical impetus. Multicomponent specimens containing two different responsive spiropyrans enabled selective activation of different regions within the specimen depending on the stimulus applied to the material. By taking advantage of the unique capabilities of 3D printing, we also demonstrate rapid modification of a prototype force sensor that enables the assessment of peak load by simple visual assessment of mechanochromism.
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Affiliation(s)
- Gregory I Peterson
- Department of Chemistry and ‡Department of Mechanical Engineering, University of Washington , Seattle, Washington 98195 United States
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610
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Li Y, Tan Y, Xu K, Lu C, Liang X, Wang P. In situ crosslinkable hydrogels formed from modified starch and O-carboxymethyl chitosan. RSC Adv 2015. [DOI: 10.1039/c4ra14984j] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
The degradable behavior of a hydrogel under varying pH was observed using SEM.
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Affiliation(s)
- Yangling Li
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
| | - Ying Tan
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
| | - Kun Xu
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
| | - Cuige Lu
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
| | - Xuechen Liang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
| | - Pixin Wang
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Science
- Changchun
- P. R. China 130022
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611
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3D Printing and Biofabrication for Load Bearing Tissue Engineering. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 881:3-14. [DOI: 10.1007/978-3-319-22345-2_1] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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612
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Khan F, Tanaka M, Ahmad SR. Fabrication of polymeric biomaterials: a strategy for tissue engineering and medical devices. J Mater Chem B 2015; 3:8224-8249. [DOI: 10.1039/c5tb01370d] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Fabrication of biomaterials scaffolds using various methods and techniques is discussed, utilising biocompatible, biodegradable and stimuli-responsive polymers and their composites. This review covers the lithography and printing techniques, self-organisation and self-assembly methods for 3D structural scaffolds generation, and smart hydrogels, for tissue regeneration and medical devices.
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Affiliation(s)
- Ferdous Khan
- Senior Polymer Chemist
- ECOSE-Biopolymer
- Knauf Insulation Limited
- St. Helens
- UK
| | - Masaru Tanaka
- Biomaterials Science Group
- Department of Biochemical Engineering
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
| | - Sheikh Rafi Ahmad
- Centre for Applied Laser Spectroscopy
- CDS
- DEAS
- Cranfield University
- Swindon
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613
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Lee K, Seo CR, Ku JM, Lee H, Yoon H, Lee J, Chun W, Park KW, Kim G. 3D-printed alginate/phenamil composite scaffolds constituted with microsized core–shell struts for hard tissue regeneration. RSC Adv 2015. [DOI: 10.1039/c5ra01479d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new composite scaffold consisting of poly(ε-caprolactone), alginate, and phenamil was manufactured by a combined process, 3D-printing and coating process, for hard tissue regeneration.
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Affiliation(s)
- KyoungHo Lee
- Department of Biomechatronic Eng
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
| | - Cho-Rong Seo
- Department of Food Science and Biotechnology
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
| | - Jin-Mo Ku
- Gyeonggi Bio-Center
- Suwon 443-270
- South Korea
| | - Hyeongjin Lee
- Department of Biomechatronic Eng
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
| | - Hyeon Yoon
- Department of Surgery
- Hangang Sacred Heart Hospital
- College of Medicine
- Hallym Univeristy
- Seoul 150-719
| | - JaeHwan Lee
- Department of Food Science and Biotechnology
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
| | - Wook Chun
- Department of Surgery
- Hangang Sacred Heart Hospital
- College of Medicine
- Hallym Univeristy
- Seoul 150-719
| | - Kye Won Park
- Department of Food Science and Biotechnology
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
| | - GeunHyung Kim
- Department of Biomechatronic Eng
- Sungkyunkwan University (SKKU)
- Suwon 440-746
- South Korea
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614
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Kirchmajer DM, Gorkin III R, in het Panhuis M. An overview of the suitability of hydrogel-forming polymers for extrusion-based 3D-printing. J Mater Chem B 2015; 3:4105-4117. [DOI: 10.1039/c5tb00393h] [Citation(s) in RCA: 211] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this review hydrogel-forming polymers that are suitable for extrusion-based 3D printing are evaluated.
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Affiliation(s)
- D. M. Kirchmajer
- Soft Materials Group
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
| | - R. Gorkin III
- Intelligent Polymer Research Institute
- ARC Centre of Excellence for Electromaterials Science
- AIIM Facility
- University of Wollongong
- Australia
| | - M. in het Panhuis
- Soft Materials Group
- School of Chemistry
- University of Wollongong
- Wollongong
- Australia
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615
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Wüst S, Müller R, Hofmann S. 3D Bioprinting of complex channels-Effects of material, orientation, geometry, and cell embedding. J Biomed Mater Res A 2014; 103:2558-70. [PMID: 25524726 DOI: 10.1002/jbm.a.35393] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Revised: 11/19/2014] [Accepted: 12/11/2014] [Indexed: 01/29/2023]
Abstract
Creating filled or hollow channels within 3D tissues has become increasingly important in tissue engineering. Channels can serve as vasculature enhancing medium perfusion or as conduits for nerve regeneration. The 3D biofabrication seems to be a promising method to generate these structures within 3D constructs layer-by-layer. In this study, geometry and interface of bioprinted channels were investigated with micro-computed tomography and fluorescent imaging. In filament printing, size and shape of printed channels are influenced by their orientation, which was analyzed by printing horizontally and vertically aligned channels, and by the ink, which was evaluated by comparing channels printed with an alginate-gelatin hydrogel or with an emulsion. The influence of geometry and cell-embedding in the hydrogel on feature size and shape was investigated by printing more complex channels. The generation of hollow channels, induced through leaching of a support phase, was monitored over time. Horizontally aligned channels provided 16× smaller cross-sectional areas than channels in vertical orientation. The smallest feature size of hydrogel filaments was twice as large compared to emulsion filaments. Feature size and shape depended on the geometry but did not alter when living cells were embedded. With that knowledge, channels can be consciously tailored to the particular needs.
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Affiliation(s)
- Silke Wüst
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, 8093, Switzerland
| | - Ralph Müller
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, 8093, Switzerland
| | - Sandra Hofmann
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, 8093, Switzerland.,Department of Biomedical Engineering, Eindhoven University of Technology, P.O. Box 513, Eindhoven, MB, 5600, The Netherlands.,Department of Biomedical Engineering, Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, Eindhoven, MB, 5600, The Netherlands
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616
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Kehr NS, Atay S, Ergün B. Self-assembled Monolayers and Nanocomposite Hydrogels of Functional Nanomaterials for Tissue Engineering Applications. Macromol Biosci 2014; 15:445-63. [DOI: 10.1002/mabi.201400363] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Nermin Seda Kehr
- Physikalisches Institut and Center for Nanotechnology; Westfälische Wilhelms-Universität Münster; Heisenbergstrasse 11 D-48149 Münster Germany
| | - Seda Atay
- Department of Nanotechnology and Nanomedicine; Hacettepe University; 06800 Ankara Turkey
| | - Bahar Ergün
- Department of Chemistry; Biochemistry Division; Hacettepe University; 06800 Ankara Turkey
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617
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Lauer FM, Kaemmerer E, Meckel T. Single molecule microscopy in 3D cell cultures and tissues. Adv Drug Deliv Rev 2014; 79-80:79-94. [PMID: 25453259 DOI: 10.1016/j.addr.2014.10.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/20/2014] [Accepted: 10/03/2014] [Indexed: 12/19/2022]
Abstract
From the onset of the first microscopic visualization of single fluorescent molecules in living cells at the beginning of this century, to the present, almost routine application of single molecule microscopy, the method has well-proven its ability to contribute unmatched detailed insight into the heterogeneous and dynamic molecular world life is composed of. Except for investigations on bacteria and yeast, almost the entire story of success is based on studies on adherent mammalian 2D cell cultures. However, despite this continuous progress, the technique was not able to keep pace with the move of the cell biology community to adapt 3D cell culture models for basic research, regenerative medicine, or drug development and screening. In this review, we will summarize the progress, which only recently allowed for the application of single molecule microscopy to 3D cell systems and give an overview of the technical advances that led to it. While initially posing a challenge, we finally conclude that relevant 3D cell models will become an integral part of the on-going success of single molecule microscopy.
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Affiliation(s)
- Florian M Lauer
- Membrane Dynamics, Department of Biology, Technische Universität Darmstadt, Schnittspahnstrasse 3-5, 64287 Darmstadt, Germany
| | - Elke Kaemmerer
- Membrane Dynamics, Department of Biology, Technische Universität Darmstadt, Schnittspahnstrasse 3-5, 64287 Darmstadt, Germany; Institute of Health and Biomedical Innovation, Science and Engineering Faculty, Queensland University of Technology, 60 Musk Ave, Kelvin Grove, 4059 QLD, Brisbane, Australia
| | - Tobias Meckel
- Membrane Dynamics, Department of Biology, Technische Universität Darmstadt, Schnittspahnstrasse 3-5, 64287 Darmstadt, Germany.
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618
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Abstract
Chronic nonhealing wounds are a major source of morbidity and mortality in bed-ridden and diabetic patients. Monitoring of physical and chemical parameters important in wound healing and remodeling process can be of immense benefit for optimum management of such lesions. Low-cost flexible polymeric and paper-based substrates are attractive platforms for fabrication of such sensors. In this review, we discuss recent advances in flexible physiochemical sensors for chronic wound monitoring. After a brief introduction to wound healing process and commercial wound dressings, we describe various flexible biocompatible substrates that can be used as the base platform for integration of wound monitoring sensors. We will then discuss several fabrication methods that can be utilized to integrate physical and chemical sensors onto such substrates. Finally, we will present physical and chemical sensors developed for monitoring wound microenvironment and outline future development venues.
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619
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Skardal A, Atala A. Biomaterials for integration with 3-D bioprinting. Ann Biomed Eng 2014; 43:730-46. [PMID: 25476164 DOI: 10.1007/s10439-014-1207-1] [Citation(s) in RCA: 264] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Accepted: 11/27/2014] [Indexed: 01/10/2023]
Abstract
Bioprinting has emerged in recent years as an attractive method for creating 3-D tissues and organs in the laboratory, and therefore is a promising technology in a number of regenerative medicine applications. It has the potential to (i) create fully functional replacements for damaged tissues in patients, and (ii) rapidly fabricate small-sized human-based tissue models, or organoids, for diagnostics, pathology modeling, and drug development. A number of bioprinting modalities have been explored, including cellular inkjet printing, extrusion-based technologies, soft lithography, and laser-induced forward transfer. Despite the innovation of each of these technologies, successful implementation of bioprinting relies heavily on integration with compatible biomaterials that are responsible for supporting the cellular components during and after biofabrication, and that are compatible with the bioprinting device requirements. In this review, we will evaluate a variety of biomaterials, such as curable synthetic polymers, synthetic gels, and naturally derived hydrogels. Specifically we will describe how they are integrated with the bioprinting technologies above to generate bioprinted constructs with practical application in medicine.
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Affiliation(s)
- Aleksander Skardal
- Wake Forest Institute for Regenerative Medicine, Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC, 27157, USA,
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620
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Antoine EE, Vlachos PP, Rylander MN. Review of collagen I hydrogels for bioengineered tissue microenvironments: characterization of mechanics, structure, and transport. TISSUE ENGINEERING. PART B, REVIEWS 2014; 20:683-96. [PMID: 24923709 PMCID: PMC4241868 DOI: 10.1089/ten.teb.2014.0086] [Citation(s) in RCA: 340] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/29/2014] [Indexed: 01/13/2023]
Abstract
Type I collagen hydrogels have been used successfully as three-dimensional substrates for cell culture and have shown promise as scaffolds for engineered tissues and tumors. A critical step in the development of collagen hydrogels as viable tissue mimics is quantitative characterization of hydrogel properties and their correlation with fabrication parameters, which enables hydrogels to be tuned to match specific tissues or fulfill engineering requirements. A significant body of work has been devoted to characterization of collagen I hydrogels; however, due to the breadth of materials and techniques used for characterization, published data are often disjoint and hence their utility to the community is reduced. This review aims to determine the parameter space covered by existing data and identify key gaps in the literature so that future characterization and use of collagen I hydrogels for research can be most efficiently conducted. This review is divided into three sections: (1) relevant fabrication parameters are introduced and several of the most popular methods of controlling and regulating them are described, (2) hydrogel properties most relevant for tissue engineering are presented and discussed along with their characterization techniques, (3) the state of collagen I hydrogel characterization is recapitulated and future directions are proposed. Ultimately, this review can serve as a resource for selection of fabrication parameters and material characterization methodologies in order to increase the usefulness of future collagen-hydrogel-based characterization studies and tissue engineering experiments.
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Affiliation(s)
| | - Pavlos P. Vlachos
- School of Mechanical Engineering, Purdue University, West Lafayette, Indiana
| | - Marissa Nichole Rylander
- Department of Mechanical Engineering, Virginia Tech, Blacksburg, Virginia
- Virginia Tech-Wake Forest School of Biomedical Engineering and Sciences, Virginia Tech, Blacksburg, Virginia
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621
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Maas M, Hess U, Rezwan K. The contribution of rheology for designing hydroxyapatite biomaterials. Curr Opin Colloid Interface Sci 2014. [DOI: 10.1016/j.cocis.2014.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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622
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Ruedinger F, Lavrentieva A, Blume C, Pepelanova I, Scheper T. Hydrogels for 3D mammalian cell culture: a starting guide for laboratory practice. Appl Microbiol Biotechnol 2014; 99:623-36. [DOI: 10.1007/s00253-014-6253-y] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 11/17/2014] [Accepted: 11/18/2014] [Indexed: 12/21/2022]
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623
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He Y, Xue GH, Fu JZ. Fabrication of low cost soft tissue prostheses with the desktop 3D printer. Sci Rep 2014; 4:6973. [PMID: 25427880 PMCID: PMC4245596 DOI: 10.1038/srep06973] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 10/16/2014] [Indexed: 01/10/2023] Open
Abstract
Soft tissue prostheses such as artificial ear, eye and nose are widely used in the maxillofacial rehabilitation. In this report we demonstrate how to fabricate soft prostheses mold with a low cost desktop 3D printer. The fabrication method used is referred to as Scanning Printing Polishing Casting (SPPC). Firstly the anatomy is scanned with a 3D scanner, then a tissue casting mold is designed on computer and printed with a desktop 3D printer. Subsequently, a chemical polishing method is used to polish the casting mold by removing the staircase effect and acquiring a smooth surface. Finally, the last step is to cast medical grade silicone into the mold. After the silicone is cured, the fine soft prostheses can be removed from the mold. Utilizing the SPPC method, soft prostheses with smooth surface and complicated structure can be fabricated at a low cost. Accordingly, the total cost of fabricating ear prosthesis is about $30, which is much lower than the current soft prostheses fabrication methods.
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Affiliation(s)
- Yong He
- 1] The State Key Lab of Fluid Power Transmission and Control Systems, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China [2] Zhejiang Province's Key Laboratory of 3D Printing Process and Equipment, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Guang-huai Xue
- 1] The State Key Lab of Fluid Power Transmission and Control Systems, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China [2] Zhejiang Province's Key Laboratory of 3D Printing Process and Equipment, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jian-zhong Fu
- 1] The State Key Lab of Fluid Power Transmission and Control Systems, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China [2] Zhejiang Province's Key Laboratory of 3D Printing Process and Equipment, Department of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
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624
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Wu C, Strehmel C, Achazi K, Chiappisi L, Dernedde J, Lensen MC, Gradzielski M, Ansorge-Schumacher MB, Haag R. Enzymatically Cross-Linked Hyperbranched Polyglycerol Hydrogels as Scaffolds for Living Cells. Biomacromolecules 2014; 15:3881-90. [DOI: 10.1021/bm500705x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Changzhu Wu
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustraße
3, 14195 Berlin, Germany
| | - Christine Strehmel
- Institut
für Chemie, Technische Universität Berlin, Straße des
17. Juni 124, 10623 Berlin, Germany
| | - Katharina Achazi
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustraße
3, 14195 Berlin, Germany
| | - Leonardo Chiappisi
- Institut
für Chemie, Technische Universität Berlin, Straße des
17. Juni 124, 10623 Berlin, Germany
| | - Jens Dernedde
- Institut
für Laboratoriumsmedizin, Klinische Chemie und Pathobiochemie, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Marga C. Lensen
- Institut
für Chemie, Technische Universität Berlin, Straße des
17. Juni 124, 10623 Berlin, Germany
| | - Michael Gradzielski
- Institut
für Chemie, Technische Universität Berlin, Straße des
17. Juni 124, 10623 Berlin, Germany
| | | | - Rainer Haag
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustraße
3, 14195 Berlin, Germany
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625
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Käpylä E, Sedlačík T, Aydogan DB, Viitanen J, Rypáček F, Kellomäki M. Direct laser writing of synthetic poly(amino acid) hydrogels and poly(ethylene glycol) diacrylates by two-photon polymerization. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:280-9. [DOI: 10.1016/j.msec.2014.07.027] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 07/03/2014] [Accepted: 07/05/2014] [Indexed: 11/17/2022]
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626
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Jia J, Richards DJ, Pollard S, Tan Y, Rodriguez J, Visconti RP, Trusk TC, Yost MJ, Yao H, Markwald RR, Mei Y. Engineering alginate as bioink for bioprinting. Acta Biomater 2014; 10:4323-31. [PMID: 24998183 PMCID: PMC4350909 DOI: 10.1016/j.actbio.2014.06.034] [Citation(s) in RCA: 304] [Impact Index Per Article: 30.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 06/06/2014] [Accepted: 06/20/2014] [Indexed: 10/25/2022]
Abstract
Recent advances in three-dimensional (3-D) printing offer an excellent opportunity to address critical challenges faced by current tissue engineering approaches. Alginate hydrogels have been used extensively as bioinks for 3-D bioprinting. However, most previous research has focused on native alginates with limited degradation. The application of oxidized alginates with controlled degradation in bioprinting has not been explored. Here, a collection of 30 different alginate hydrogels with varied oxidation percentages and concentrations was prepared to develop a bioink platform that can be applied to a multitude of tissue engineering applications. The authors systematically investigated the effects of two key material properties (i.e. viscosity and density) of alginate solutions on their printabilities to identify a suitable range of material properties of alginates to be applied to bioprinting. Further, four alginate solutions with varied biodegradability were printed with human adipose-derived stem cells (hADSCs) into lattice-structured, cell-laden hydrogels with high accuracy. Notably, these alginate-based bioinks were shown to be capable of modulating proliferation and spreading of hADSCs without affecting the structure integrity of the lattice structures (except the highly degradable one) after 8days in culture. This research lays a foundation for the development of alginate-based bioink for tissue-specific tissue engineering applications.
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Affiliation(s)
- Jia Jia
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
| | - Dylan J Richards
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
| | - Samuel Pollard
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
| | - Yu Tan
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
| | - Joshua Rodriguez
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA
| | - Richard P Visconti
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Thomas C Trusk
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Michael J Yost
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Hai Yao
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA; Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Roger R Markwald
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Ying Mei
- Bioengineering Department, Clemson University, Clemson, SC 29634, USA; Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA.
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627
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Abstract
Interest in "engineering liver" arises from multiple communities: therapeutic replacement; mechanistic models of human processes; and drug safety and efficacy studies. An explosion of micro- and nanofabrication, biomaterials, microfluidic, and other technologies potentially affords unprecedented opportunity to create microphysiological models of the human liver, but engineering design principles for how to deploy these tools effectively toward specific applications, including how to define the essential constraints of any given application (available sources of cells, acceptable cost, and user-friendliness), are still emerging. Arguably less appreciated is the parallel growth in computational systems biology approaches toward these same problems-particularly in parsing complex disease processes from clinical material, building models of response networks, and in how to interpret the growing compendium of data on drug efficacy and toxicology in patient populations. Here, we provide insight into how the complementary paths of engineering liver-experimental and computational-are beginning to interplay toward greater illumination of human disease states and technologies for drug development.
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Affiliation(s)
- Linda G Griffith
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA
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628
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Bakarich SE, Gorkin R, in het Panhuis M, Spinks GM. Three-dimensional printing fiber reinforced hydrogel composites. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15998-6006. [PMID: 25197745 DOI: 10.1021/am503878d] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
An additive manufacturing process that combines digital modeling and 3D printing was used to prepare fiber reinforced hydrogels in a single-step process. The composite materials were fabricated by selectively pattering a combination of alginate/acrylamide gel precursor solution and an epoxy based UV-curable adhesive (Emax 904 Gel-SC) with an extrusion printer. UV irradiation was used to cure the two inks into a single composite material. Spatial control of fiber distribution within the digital models allowed for the fabrication of a series of materials with a spectrum of swelling behavior and mechanical properties with physical characteristics ranging from soft and wet to hard and dry. A comparison with the "rule of mixtures" was used to show that the swollen composite materials adhere to standard composite theory. A prototype meniscus cartilage was prepared to illustrate the potential application in bioengineering.
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Affiliation(s)
- Shannon E Bakarich
- Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, AIIM Facility, University of Wollongong , North Wollongong, New South Wales 2522, Australia
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629
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Drzewiecki K, Parmar AS, Gaudet ID, Branch JR, Pike DH, Nanda V, Shreiber DI. Methacrylation induces rapid, temperature-dependent, reversible self-assembly of type-I collagen. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11204-11. [PMID: 25208340 PMCID: PMC4172302 DOI: 10.1021/la502418s] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Type-I collagen self-assembles into a fibrillar gel at physiological temperature and pH to provide a cell-adhesive, supportive, structural network. As such, it is an attractive, popular scaffold for in vitro evaluations of cellular behavior and for tissue engineering applications. In this study, type-I collagen is modified to introduce methacrylate groups on the free amines of the lysine residues to create collagen methacrylamide (CMA). CMA retains the properties of collagen such as self-assembly, biodegradability, and natural bioactivity but is also photoactive and can be rapidly cross-linked or functionalized with acrylated molecules when irradiated with ultraviolet light in the presence of a photoinitiator. CMA also demonstrates unique temperature-dependent behavior. For natural type-I collagen, the overall structure of the fiber network remains largely static over time scales of a few hours upon heating and cooling at temperatures below its denaturation point. CMA, however, is rapidly thermoreversible and will oscillate between a liquid macromer suspension and a semisolid fibrillar hydrogel when the temperature is modulated between 10 and 37 °C. Using a series of mechanical, scattering, and spectroscopic methods, we demonstrate that structural reversibility is manifest across multiple scales from the protein topology of the triple helix up through the rheological properties of the CMA hydrogel. Electron microscopy imaging of CMA after various stages of heating and cooling shows that the canonical collagen-like D-periodic banding ultrastructure of the fibers is preserved. A rapidly thermoreversible collagen-based hydrogel is expected to have wide utility in tissue engineering and drug delivery applications as a biofunctional, biocompatible material. Thermal reversibility also makes CMA a powerful model for studying the complex process of hierarchical collagen self-assembly.
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Affiliation(s)
- Kathryn
E. Drzewiecki
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Avanish S. Parmar
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Ian D. Gaudet
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Jonathan R. Branch
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Douglas H. Pike
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - Vikas Nanda
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
| | - David I. Shreiber
- Department
of Biomedical Engineering and Center for Advanced Biotechnology
and Medicine, Department of Biochemistry and Molecular Biology, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
- E-mail:
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630
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Effect of layer thickness and printing orientation on mechanical properties and dimensional accuracy of 3D printed porous samples for bone tissue engineering. PLoS One 2014; 9:e108252. [PMID: 25233468 PMCID: PMC4169505 DOI: 10.1371/journal.pone.0108252] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Accepted: 08/27/2014] [Indexed: 12/22/2022] Open
Abstract
Powder-based inkjet 3D printing method is one of the most attractive solid free form techniques. It involves a sequential layering process through which 3D porous scaffolds can be directly produced from computer-generated models. 3D printed products' quality are controlled by the optimal build parameters. In this study, Calcium Sulfate based powders were used for porous scaffolds fabrication. The printed scaffolds of 0.8 mm pore size, with different layer thickness and printing orientation, were subjected to the depowdering step. The effects of four layer thicknesses and printing orientations, (parallel to X, Y and Z), on the physical and mechanical properties of printed scaffolds were investigated. It was observed that the compressive strength, toughness and Young's modulus of samples with 0.1125 and 0.125 mm layer thickness were more than others. Furthermore, the results of SEM and μCT analyses showed that samples with 0.1125 mm layer thickness printed in X direction have more dimensional accuracy and significantly close to CAD software based designs with predefined pore size, porosity and pore interconnectivity.
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631
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Blaeser A, Campos DFD, Köpf M, Weber M, Fischer H. Assembly of thin-walled, cell-laden hydrogel conduits inflated with perfluorocarbon. RSC Adv 2014. [DOI: 10.1039/c4ra04135f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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632
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Lowe SB, Tan VTG, Soeriyadi AH, Davis TP, Gooding JJ. Synthesis and High-Throughput Processing of Polymeric Hydrogels for 3D Cell Culture. Bioconjug Chem 2014; 25:1581-601. [DOI: 10.1021/bc500310v] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | - Thomas P. Davis
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Parkville, VIC 3052, Australia
- Department
of Chemistry, University of Warwick, Coventry, CV4 7AL, United Kingdom
- Monash Institute
of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - J. Justin Gooding
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Parkville, VIC 3052, Australia
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633
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Ciuciu AI, Cywiński PJ. Two-photon polymerization of hydrogels – versatile solutions to fabricate well-defined 3D structures. RSC Adv 2014. [DOI: 10.1039/c4ra06892k] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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634
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Ye M, Mohanty P, Ghosh G. Morphology and properties of poly vinyl alcohol (PVA) scaffolds: Impact of process variables. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 42:289-94. [DOI: 10.1016/j.msec.2014.05.029] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/05/2014] [Accepted: 05/07/2014] [Indexed: 12/25/2022]
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635
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Seol YJ, Kang HW, Lee SJ, Atala A, Yoo JJ. Bioprinting technology and its applications. Eur J Cardiothorac Surg 2014; 46:342-8. [DOI: 10.1093/ejcts/ezu148] [Citation(s) in RCA: 214] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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636
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Lücking TH, Sambale F, Beutel S, Scheper T. 3D-printed individual labware in biosciences by rapid prototyping: A proof of principle. Eng Life Sci 2014. [DOI: 10.1002/elsc.201400093] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Affiliation(s)
- Tim H. Lücking
- Institute of Technical Chemistry; Gottfried Wilhelm Leibniz Universität Hannover; Hannover Germany
| | - Franziska Sambale
- Institute of Technical Chemistry; Gottfried Wilhelm Leibniz Universität Hannover; Hannover Germany
| | - Sascha Beutel
- Institute of Technical Chemistry; Gottfried Wilhelm Leibniz Universität Hannover; Hannover Germany
| | - Thomas Scheper
- Institute of Technical Chemistry; Gottfried Wilhelm Leibniz Universität Hannover; Hannover Germany
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637
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Nune KC, Misra RDK, Gaytan SM, Murr LE. Interplay between cellular activity and three-dimensional scaffold-cell constructs with different foam structure processed by electron beam melting. J Biomed Mater Res A 2014; 103:1677-92. [PMID: 25111154 DOI: 10.1002/jbm.a.35307] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Accepted: 07/31/2014] [Indexed: 12/28/2022]
Abstract
The cellular activity, biological response, and consequent integration of scaffold-cell construct in the physiological system are governed by the ability of cells to adhere, proliferate, and biomineralize. In this regard, we combine cellular biology and materials science and engineering to fundamentally elucidate the interplay between cellular activity and interconnected three-dimensional foamed architecture obtained by a novel process of electron beam melting and computational tools. Furthermore, the organization of key proteins, notably, actin, vinclulin, and fibronectin, involved in cellular activity and biological functions and relationship with the structure was explored. The interconnected foamed structure with ligaments was favorable to cellular activity that includes cell attachment, proliferation, and differentiation. The primary rationale for favorable modulation of cellular functions is that the foamed structure provided a channel for migration and communication between cells leading to highly mineralized extracellular matrix (ECM) by the differentiating osteoblasts. The filopodial interaction amongst cells on the ligaments was a governing factor in the secretion of ECM, with consequent influence on maturation and mineralization.
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Affiliation(s)
- Krishna C Nune
- Biomaterials and Biomedical Engineering Research Laboratory, Center for Structural and Functional Materials, Institute for Materials Research and Innovation, University of Louisiana at Lafayette, Lafayette, Louisiana, 70504
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638
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Yeo M, Kim G. Optimal size of cell-laden hydrogel cylindrical struts for enhancing the cellular activities and their application to hybrid scaffolds. J Mater Chem B 2014; 2:6830-6838. [DOI: 10.1039/c4tb00785a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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639
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Femmer T, Kuehne AJC, Wessling M. Print your own membrane: direct rapid prototyping of polydimethylsiloxane. LAB ON A CHIP 2014; 14:2610-2613. [PMID: 24828586 DOI: 10.1039/c4lc00320a] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polydimethylsiloxane is a translucent and biologically inert silicone material used in sealants, biomedical implants and microscale lab-on-a-chip devices. Furthermore, in membrane technology, polydimethylsiloxane represents a material for separation barriers as it has high permeabilities for various gases. The facile handling of two component formulations with a silicone base material, a catalyst and a small molecular weight crosslinker makes it widely applicable for soft-lithographic replication of two-dimensional device geometries, such as microfluidic chips or micro-contact stamps. Here, we develop a new technique to directly print polydimethylsiloxane in a rapid prototyping device, circumventing the need for masks or sacrificial mold production. We create a three-dimensional polydimethylsiloxane membrane for gas-liquid-contacting based on a Schwarz-P triple-periodic minimal-surface, which is inaccessible with common machining techniques. Direct 3D-printing of polydimethylsiloxane enables rapid production of novel chip geometries for a manifold of lab-on-a-chip applications.
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Affiliation(s)
- Tim Femmer
- Chemical Process Engineering, RWTH Aachen University, Turmstraße 46, 52064 Aachen, Germany.
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640
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Levato R, Visser J, Planell JA, Engel E, Malda J, Mateos-Timoneda MA. Biofabrication of tissue constructs by 3D bioprinting of cell-laden microcarriers. Biofabrication 2014; 6:035020. [PMID: 25048797 DOI: 10.1088/1758-5082/6/3/035020] [Citation(s) in RCA: 233] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bioprinting allows the fabrication of living constructs with custom-made architectures by spatially controlled deposition of multiple bioinks. This is important for the generation of tissue, such as osteochondral tissue, which displays a zonal composition in the cartilage domain supported by the underlying subchondral bone. Challenges in fabricating functional grafts of clinically relevant size include the incorporation of cues to guide specific cell differentiation and the generation of sufficient cells, which is hard to obtain with conventional cell culture techniques. A novel strategy to address these demands is to combine bioprinting with microcarrier technology. This technology allows for the extensive expansion of cells, while they form multi-cellular aggregates, and their phenotype can be controlled. In this work, living constructs were fabricated via bioprinting of cell-laden microcarriers. Mesenchymal stromal cell (MSC)-laden polylactic acid microcarriers, obtained via static culture or spinner flask expansion, were encapsulated in gelatin methacrylamide-gellan gum bioinks, and the printability of the composite material was studied. This bioprinting approach allowed for the fabrication of constructs with high cell concentration and viability. Microcarrier encapsulation improved the compressive modulus of the hydrogel constructs, facilitated cell adhesion, and supported osteogenic differentiation and bone matrix deposition by MSCs. Bilayered osteochondral models were fabricated using microcarrier-laden bioink for the bone compartment. These findings underscore the potential of this new microcarrier-based biofabrication approach for bone and osteochondral constructs.
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Affiliation(s)
- Riccardo Levato
- Biomaterials for regenerative therapies group, Institute for Bioengineering of Catalonia (IBEC), Barcelona, Spain. CIBER en Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain
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641
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Thavornyutikarn B, Chantarapanich N, Sitthiseripratip K, Thouas GA, Chen Q. Bone tissue engineering scaffolding: computer-aided scaffolding techniques. Prog Biomater 2014; 3:61-102. [PMID: 26798575 PMCID: PMC4709372 DOI: 10.1007/s40204-014-0026-7] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 06/20/2014] [Indexed: 12/15/2022] Open
Abstract
Tissue engineering is essentially a technique for imitating nature. Natural tissues consist of three components: cells, signalling systems (e.g. growth factors) and extracellular matrix (ECM). The ECM forms a scaffold for its cells. Hence, the engineered tissue construct is an artificial scaffold populated with living cells and signalling molecules. A huge effort has been invested in bone tissue engineering, in which a highly porous scaffold plays a critical role in guiding bone and vascular tissue growth and regeneration in three dimensions. In the last two decades, numerous scaffolding techniques have been developed to fabricate highly interconnective, porous scaffolds for bone tissue engineering applications. This review provides an update on the progress of foaming technology of biomaterials, with a special attention being focused on computer-aided manufacturing (Andrade et al. 2002) techniques. This article starts with a brief introduction of tissue engineering (Bone tissue engineering and scaffolds) and scaffolding materials (Biomaterials used in bone tissue engineering). After a brief reviews on conventional scaffolding techniques (Conventional scaffolding techniques), a number of CAM techniques are reviewed in great detail. For each technique, the structure and mechanical integrity of fabricated scaffolds are discussed in detail. Finally, the advantaged and disadvantage of these techniques are compared (Comparison of scaffolding techniques) and summarised (Summary).
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Affiliation(s)
| | - Nattapon Chantarapanich
- Department of Mechanical Engineering, Faculty of Engineering at Si Racha, Kasetsart University, 199 Sukhumvit Road, Si Racha, Chonburi 20230 Thailand
| | - Kriskrai Sitthiseripratip
- National Metal and Materials Technology Center (MTEC), 114 Thailand Science Park, Phahonyothin Road, Klong Luang, Pathumthani 12120 Thailand
| | - George A. Thouas
- Department of Materials Engineering, Monash University, Clayton, VIC 3800 Australia
| | - Qizhi Chen
- Department of Materials Engineering, Monash University, Clayton, VIC 3800 Australia
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642
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Huang CC, Ravindran S, Yin Z, George A. 3-D self-assembling leucine zipper hydrogel with tunable properties for tissue engineering. Biomaterials 2014; 35:5316-5326. [PMID: 24713184 PMCID: PMC4020426 DOI: 10.1016/j.biomaterials.2014.03.035] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 03/14/2014] [Indexed: 12/12/2022]
Abstract
Peptide-based engineered hydrogel scaffolds present several advantages over traditional protein or polymeric hydrogels by imparting more robust control over hydrogel properties. In this manuscript, we report the synthesis and characterization of a leucine zipper (LZ) based self-assembling hydrogel for use in tissue engineering applications. Although, LZ hydrogels posses several advantages, the stability of these hydrogels has always been elusive. In this study, we have standardized the procedure for creating a stable LZ hydrogel. Pore-size was tunable by altering the peptide concentration from 7% to 12% by weight. In order to create a microenvironment for cell adhesion, the LZ polypeptide was functionalized by the incorporation of the cell attachment RGD domain. In vivo implantation of the LZ scaffolds in a mouse model showed absence of foreign body reaction to the scaffold. In vivo experiments with human marrow stem cells (HMSCs) in immunocompromised mice showed the biological property of the hydrogel to promote cell attachment, proliferation and its ability to support neovascularization. Our results show for the first time, that it is possible to generate a functional and stable LZ scaffold that can be used in vivo for tissue engineering applications.
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Affiliation(s)
- Chun-Chieh Huang
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Sriram Ravindran
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Oral Biology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ziying Yin
- Department of Bioengineering, University of Illinois at Chicago, Chicago, IL 60607, USA
| | - Anne George
- Brodie Tooth Development Genetics & Regenerative Medicine Research Laboratory, USA; Department of Oral Biology, University of Illinois at Chicago, Chicago, IL 60612, USA.
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643
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Wang Y, Zhao Q, Zhang H, Yang S, Jia X. A novel poly(amido amine)-dendrimer-based hydrogel as a mimic for the extracellular matrix. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:4163-4167. [PMID: 24729192 DOI: 10.1002/adma.201400323] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 02/26/2014] [Indexed: 06/03/2023]
Abstract
The extracellular matrix is mimicked by a novel dendrimer-based hydrogel, which exhibits a highly interconnected porous network, enhanced mechanical stiffness, and a low swelling ratio. The hydrogel system supports the proliferation and differentiation of mesenchymal stem cells without any cytotoxic effects. This dendrimer-based hydrogel may serve as a model for developing new advanced materials with applications in tissue engineering.
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Affiliation(s)
- Yao Wang
- Beijing National Laboratory for Molecular Sciences and the Key Laboratory of Polymer Chemistry and Physics of the Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
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644
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Boere KWM, Visser J, Seyednejad H, Rahimian S, Gawlitta D, van Steenbergen MJ, Dhert WJA, Hennink WE, Vermonden T, Malda J. Covalent attachment of a three-dimensionally printed thermoplast to a gelatin hydrogel for mechanically enhanced cartilage constructs. Acta Biomater 2014; 10:2602-11. [PMID: 24590160 DOI: 10.1016/j.actbio.2014.02.041] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 01/23/2014] [Accepted: 02/21/2014] [Indexed: 01/01/2023]
Abstract
Hydrogels can provide a suitable environment for tissue formation by embedded cells, which makes them suitable for applications in regenerative medicine. However, hydrogels possess only limited mechanical strength, and must therefore be reinforced for applications in load-bearing conditions. In most approaches the reinforcing component and the hydrogel network have poor interactions and the synergetic effect of both materials on the mechanical properties is not effective. Therefore, in the present study, a thermoplastic polymer blend of poly(hydroxymethylglycolide-co-ε-caprolactone)/poly(ε-caprolactone) (pHMGCL/PCL) was functionalized with methacrylate groups (pMHMGCL/PCL) and covalently grafted to gelatin methacrylamide (gelMA) hydrogel through photopolymerization. The grafting resulted in an at least fivefold increase in interface-binding strength between the hydrogel and the thermoplastic polymer material. GelMA constructs were reinforced with three-dimensionally printed pHMGCL/PCL and pMHMGCL/PCL scaffolds and tested in a model for a focal articular cartilage defect. In this model, covalent bonds at the interface of the two materials resulted in constructs with an improved resistance to repeated axial and rotational forces. Moreover, chondrocytes embedded within the constructs were able to form cartilage-specific matrix both in vitro and in vivo. Thus, by grafting the interface of different materials, stronger hybrid cartilage constructs can be engineered.
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Affiliation(s)
- Kristel W M Boere
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Jetze Visser
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Hajar Seyednejad
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Sima Rahimian
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Debby Gawlitta
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands
| | - Mies J van Steenbergen
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Wouter J A Dhert
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, PO Box 80163, 3508 TD Utrecht, The Netherlands
| | - Wim E Hennink
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Tina Vermonden
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Faculty of Science, Utrecht University, PO Box 80082, 3508 TB Utrecht, The Netherlands
| | - Jos Malda
- Department of Orthopaedics, University Medical Center Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, PO Box 80163, 3508 TD Utrecht, The Netherlands.
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645
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Krontiras P, Gatenholm P, Hägg DA. Adipogenic differentiation of stem cells in three-dimensional porous bacterial nanocellulose scaffolds. J Biomed Mater Res B Appl Biomater 2014; 103:195-203. [DOI: 10.1002/jbm.b.33198] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 03/26/2014] [Accepted: 04/24/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Panagiotis Krontiras
- Department of Chemical and Biological Engineering; Chalmers University of Technology; Gothenburg SE-412 96 Sweden
| | - Paul Gatenholm
- Department of Chemical and Biological Engineering; Chalmers University of Technology; Gothenburg SE-412 96 Sweden
| | - Daniel A Hägg
- Department of Chemical and Biological Engineering; Chalmers University of Technology; Gothenburg SE-412 96 Sweden
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646
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Duan B, Kapetanovic E, Hockaday LA, Butcher JT. Three-dimensional printed trileaflet valve conduits using biological hydrogels and human valve interstitial cells. Acta Biomater 2014; 10:1836-46. [PMID: 24334142 DOI: 10.1016/j.actbio.2013.12.005] [Citation(s) in RCA: 237] [Impact Index Per Article: 23.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2013] [Revised: 11/20/2013] [Accepted: 12/05/2013] [Indexed: 12/20/2022]
Abstract
Tissue engineering has great potential to provide a functional de novo living valve replacement, capable of integration with host tissue and growth. Among various valve conduit fabrication techniques, three-dimensional (3-D) bioprinting enables deposition of cells and hydrogels into 3-D constructs with anatomical geometry and heterogeneous mechanical properties. Successful translation of this approach, however, is constrained by the dearth of printable and biocompatible hydrogel materials. Furthermore, it is not known how human valve cells respond to these printed environments. In this study, 3-D printable formulations of hybrid hydrogels are developed, based on methacrylated hyaluronic acid (Me-HA) and methacrylated gelatin (Me-Gel), and used to bioprint heart valve conduits containing encapsulated human aortic valvular interstitial cells (HAVIC). Increasing Me-Gel concentration resulted in lower stiffness and higher viscosity, facilitated cell spreading, and better maintained HAVIC fibroblastic phenotype. Bioprinting accuracy was dependent upon the relative concentrations of Me-Gel and Me-HA, but when optimized enabled the fabrication of a trileaflet valve shape accurate to the original design. HAVIC encapsulated within bioprinted heart valves maintained high viability, and remodeled the initial matrix by depositing collagen and glyosaminoglycans. These findings represent the first rational design of bioprinted trileaflet valve hydrogels that regulate encapsulated human VIC behavior. The use of anatomically accurate living valve scaffolds through bioprinting may accelerate understanding of physiological valve cell interactions and progress towards de novo living valve replacements.
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Affiliation(s)
- B Duan
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - E Kapetanovic
- College of Human Ecology, Cornell University, Ithaca, NY, USA
| | - L A Hockaday
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA
| | - J T Butcher
- Department of Biomedical Engineering, Cornell University, Ithaca, NY 14853, USA.
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647
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Coulombe KLK, Bajpai VK, Andreadis ST, Murry CE. Heart regeneration with engineered myocardial tissue. Annu Rev Biomed Eng 2014; 16:1-28. [PMID: 24819474 DOI: 10.1146/annurev-bioeng-071812-152344] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Heart disease is the leading cause of morbidity and mortality worldwide, and regenerative therapies that replace damaged myocardium could benefit millions of patients annually. The many cell types in the heart, including cardiomyocytes, endothelial cells, vascular smooth muscle cells, pericytes, and cardiac fibroblasts, communicate via intercellular signaling and modulate each other's function. Although much progress has been made in generating cells of the cardiovascular lineage from human pluripotent stem cells, a major challenge now is creating the tissue architecture to integrate a microvascular circulation and afferent arterioles into such an engineered tissue. Recent advances in cardiac and vascular tissue engineering will move us closer to the goal of generating functionally mature tissue. Using the biology of the myocardium as the foundation for designing engineered tissue and addressing the challenges to implantation and integration, we can bridge the gap from bench to bedside for a clinically tractable engineered cardiac tissue.
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648
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Bone tissue engineering: state of the union. Drug Discov Today 2014; 19:781-6. [PMID: 24768619 DOI: 10.1016/j.drudis.2014.04.010] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Revised: 04/07/2014] [Accepted: 04/15/2014] [Indexed: 02/03/2023]
Abstract
The quest to surpass the clinical efficacy of the allogeneic bone graft has had limited success, an outcome that is symbolic of tissue engineering as a whole. In this 'State of the Union'-type review, we highlight recent advances in the design of bone regenerative therapeutics using the primary elements of stem cells, growth factors and scaffolds, and identify major obstacles in their paths to the clinic. We underscore the need for rigorous performance criteria in the design of holistic tissue regenerative therapeutics, and an increased emphasis on the product production, storage and handling issues that will ultimately influence clinical success.
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649
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Esquirol AL, Sarazin P, Virgilio N. Tunable Porous Hydrogels from Cocontinuous Polymer Blends. Macromolecules 2014. [DOI: 10.1021/ma402603b] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Anne-Laure Esquirol
- CREPEC,
Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079 Succursale
Centre-Ville, Montréal, Québec H3C 3A7, Canada
| | - Pierre Sarazin
- Trampoline Innovations, Montréal, Québec H2G 2L3, Canada
| | - Nick Virgilio
- CREPEC,
Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079 Succursale
Centre-Ville, Montréal, Québec H3C 3A7, Canada
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650
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Ovsianikov A, Mühleder S, Torgersen J, Li Z, Qin XH, Van Vlierberghe S, Dubruel P, Holnthoner W, Redl H, Liska R, Stampfl J. Laser photofabrication of cell-containing hydrogel constructs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:3787-94. [PMID: 24033187 DOI: 10.1021/la402346z] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The two-photon polymerization (2PP) of photosensitive gelatin in the presence of living cells is reported. The 2PP technique is based on the localized cross-linking of photopolymers induced by femtosecond laser pulses. The availability of water-soluble photoinitiators (PI) suitable for 2PP is crucial for applying this method to cell-containing materials. Novel PIs developed by our group allow 2PP of formulations with up to 80% cell culture medium. The cytocompatibility of these PIs was evaluated by an MTT assay. The results of cell encapsulation by 2PP show the occurrence of cell damage within the laser-exposed regions. However, some cells located in the immediate vicinity and even within the 2PP-produced structures remain viable and can further proliferate. The control experiments demonstrate that the laser radiation itself does not damage the cells at the parameters used for 2PP. On the basis of these findings and the reports by other groups, we conclude that such localized cell damage is of a chemical origin and can be attributed to reactive species generated during 2PP. The viable cells trapped within the 2PP structures but not exposed to laser radiation continued to proliferate. The live/dead staining after 3 weeks revealed viable cells occupying most of the space available within the 3D hydrogel constructs. While some of the questions raised by this study remain open, the presented results indicate the general practicability of 2PP for 3D processing of cell-containing materials. The potential applications of this highly versatile approach span from precise engineering of 3D tissue models to the fabrication of cellular microarrays.
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Affiliation(s)
- Aleksandr Ovsianikov
- Institute of Materials Science and Technology, Vienna University of Technology , Favoritenstrasse 9-11, Vienna, Austria
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