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Mota C, Camarero-Espinosa S, Baker MB, Wieringa P, Moroni L. Bioprinting: From Tissue and Organ Development to in Vitro Models. Chem Rev 2020; 120:10547-10607. [PMID: 32407108 PMCID: PMC7564098 DOI: 10.1021/acs.chemrev.9b00789] [Citation(s) in RCA: 136] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Indexed: 02/08/2023]
Abstract
Bioprinting techniques have been flourishing in the field of biofabrication with pronounced and exponential developments in the past years. Novel biomaterial inks used for the formation of bioinks have been developed, allowing the manufacturing of in vitro models and implants tested preclinically with a certain degree of success. Furthermore, incredible advances in cell biology, namely, in pluripotent stem cells, have also contributed to the latest milestones where more relevant tissues or organ-like constructs with a certain degree of functionality can already be obtained. These incredible strides have been possible with a multitude of multidisciplinary teams around the world, working to make bioprinted tissues and organs more relevant and functional. Yet, there is still a long way to go until these biofabricated constructs will be able to reach the clinics. In this review, we summarize the main bioprinting activities linking them to tissue and organ development and physiology. Most bioprinting approaches focus on mimicking fully matured tissues. Future bioprinting strategies might pursue earlier developmental stages of tissues and organs. The continuous convergence of the experts in the fields of material sciences, cell biology, engineering, and many other disciplines will gradually allow us to overcome the barriers identified on the demanding path toward manufacturing and adoption of tissue and organ replacements.
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Affiliation(s)
- Carlos Mota
- Department of Complex Tissue Regeneration,
MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands
| | - Sandra Camarero-Espinosa
- Department of Complex Tissue Regeneration,
MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands
| | - Matthew B. Baker
- Department of Complex Tissue Regeneration,
MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands
| | - Paul Wieringa
- Department of Complex Tissue Regeneration,
MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands
| | - Lorenzo Moroni
- Department of Complex Tissue Regeneration,
MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, 6211 LK Maastricht, The Netherlands
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Khalili M, Asadi M, Kahroba H, Soleyman MR, Andre H, Alizadeh E. Corneal endothelium tissue engineering: An evolution of signaling molecules, cells, and scaffolds toward 3D bioprinting and cell sheets. J Cell Physiol 2020; 236:3275-3303. [PMID: 33090510 DOI: 10.1002/jcp.30085] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 08/31/2020] [Accepted: 09/21/2020] [Indexed: 12/12/2022]
Abstract
Cornea is an avascular and transparent tissue that focuses light on retina. Cornea is supported by the corneal-endothelial layer through regulation of hydration homeostasis. Restoring vision in patients afflicted with corneal endothelium dysfunction-mediated blindness most often requires corneal transplantation (CT), which faces considerable constrictions due to donor limitations. An emerging alternative to CT is corneal endothelium tissue engineering (CETE), which involves utilizing scaffold-based methods and scaffold-free strategies. The innovative scaffold-free method is cell sheet engineering, which typically generates cell layers surrounded by an intact extracellular matrix, exhibiting tunable release from the stimuli-responsive surface. In some studies, scaffold-based or scaffold-free technologies have been reported to achieve promising outcomes. However, yet some issues exist in translating CETE from bench to clinical practice. In this review, we compare different corneal endothelium regeneration methods and elaborate on the application of multiple cell types (stem cells, corneal endothelial cells, and endothelial precursors), signaling molecules (growth factors, cytokines, chemical compounds, and small RNAs), and natural and synthetic scaffolds for CETE. Furthermore, we discuss the importance of three-dimensional bioprinting strategies and simulation of Descemet's membrane by biomimetic topography. Finally, we dissected the recent advances, applications, and prospects of cell sheet engineering for CETE.
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Affiliation(s)
- Mostafa Khalili
- Drug Applied Research Center and Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
- Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Asadi
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Houman Kahroba
- Biomedicine Institute, and Department of Molecular Medicine, Faculty of Advanced Medical Sciences, Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Reza Soleyman
- CinnaGen Medical Biotechnology Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Helder Andre
- Department of Clinical Neuroscience, St. Erik Eye Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Effat Alizadeh
- Drug Applied Research Center and Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
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103
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Tidu A, Schanne-Klein MC, Borderie VM. Development, structure, and bioengineering of the human corneal stroma: A review of collagen-based implants. Exp Eye Res 2020; 200:108256. [PMID: 32971095 DOI: 10.1016/j.exer.2020.108256] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 09/17/2020] [Accepted: 09/18/2020] [Indexed: 01/15/2023]
Abstract
Bio-engineering technologies are currently used to produce biomimetic artificial corneas that should present structural, chemical, optical, and biomechanical properties close to the native tissue. These properties are mainly supported by the corneal stroma which accounts for 90% of corneal thickness and is mainly made of collagen type I. The stromal collagen fibrils are arranged in lamellae that have a plywood-like organization. The fibril diameter is between 25 and 35 nm and the interfibrillar space about 57 nm. The number of lamellae in the central stroma is estimated to be 300. In the anterior part, their size is 10-40 μm. They appear to be larger in the posterior part of the stroma with a size of 60-120 μm. Their thicknesses also vary from 0.2 to 2.5 μm. During development, the acellular corneal stroma, which features a complex pattern of organization, serves as a scaffold for mesenchymal cells that invade and further produce the cellular stroma. Several pathways including Bmp4, Wnt/β-catenin, Notch, retinoic acid, and TGF-β, in addition to EFTFs including the mastering gene Pax-6, are involved in corneal development. Besides, retinoic acid and TGF- β seem to have a crucial role in the neural crest cell migration in the stroma. Several technologies can be used to produce artificial stroma. Taking advantage of the liquid-crystal properties of acid-soluble collagen, it is possible to produce transparent stroma-like matrices with native-like collagen I fibrils and plywood-like organization, where epithelial cells can adhere and proliferate. Other approaches include the use of recombinant collagen, cross-linkers, vitrification, plastically compressed collagen or magnetically aligned collagen, providing interesting optical and mechanical properties. These technologies can be classified according to collagen type and origin, presence of telopeptides and native-like fibrils, structure, and transparency. Collagen matrices feature transparency >80% for the appropriate 500-μm thickness. Non-collagenous matrices made of biopolymers including gelatin, silk, or fish scale have been developed which feature interesting properties but are less biomimetic. These bioengineered matrices still need to be colonized by stromal cells to fully reproduce the native stroma.
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Affiliation(s)
- Aurélien Tidu
- Institut de la Vision, Sorbonne Université, INSERM, CNRS, Centre Hospitalier, National d'Ophtalmologie des 15-20, 75571, Paris, France; Groupe de Recherche Clinique 32, Sorbonne Université, Paris, France
| | - Marie-Claire Schanne-Klein
- Laboratory for Optics and Biosciences, LOB, Ecole Polytechnique, CNRS, Inserm, Université Paris-Saclay, 91128, Palaiseau, France
| | - Vincent M Borderie
- Institut de la Vision, Sorbonne Université, INSERM, CNRS, Centre Hospitalier, National d'Ophtalmologie des 15-20, 75571, Paris, France; Groupe de Recherche Clinique 32, Sorbonne Université, Paris, France.
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104
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Shiju TM, Carlos de Oliveira R, Wilson SE. 3D in vitro corneal models: A review of current technologies. Exp Eye Res 2020; 200:108213. [PMID: 32890484 DOI: 10.1016/j.exer.2020.108213] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 08/11/2020] [Accepted: 08/31/2020] [Indexed: 02/07/2023]
Abstract
Three-dimensional (3D) in vitro models are excellent tools for studying complex biological systems because of their physiological similarity to in vivo studies, cost-effectiveness and decreased reliance on animals. The influence of tissue microenvironment on the cells, cell-cell interaction and the cell-matrix interactions can be elucidated in 3D models, which are difficult to mimic in 2D cultures. In order to develop a 3D model, the required cell types are derived from the tissues or stem cells. A 3D tissue/organ model typically includes all the relevant cell types and the microenvironment corresponding to that tissue/organ. For instance, a full corneal 3D model is expected to have epithelial, stromal, endothelial and nerve cells, along with the extracellular matrix and membrane components associated with the cells. Although it is challenging to develop a corneal 3D model, several attempts have been made and various technologies established which closely mimic the in vivo environment. In this review, three major technologies are highlighted: organotypic cultures, organoids and 3D bioprinting. Also, several combinations of organotypic cultures, such as the epithelium and stroma or endothelium and neural cultures are discussed, along with the disease relevance and potential applications of these models. In the future, new biomaterials will likely promote better cell-cell and cell-matrix interactions in organotypic corneal cultures.
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105
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Bahraminasab M. Challenges on optimization of 3D-printed bone scaffolds. Biomed Eng Online 2020; 19:69. [PMID: 32883300 PMCID: PMC7469110 DOI: 10.1186/s12938-020-00810-2] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 08/22/2020] [Indexed: 12/15/2022] Open
Abstract
Advances in biomaterials and the need for patient-specific bone scaffolds require modern manufacturing approaches in addition to a design strategy. Hybrid materials such as those with functionally graded properties are highly needed in tissue replacement and repair. However, their constituents, proportions, sizes, configurations and their connection to each other are a challenge to manufacturing. On the other hand, various bone defect sizes and sites require a cost-effective readily adaptive manufacturing technique to provide components (scaffolds) matching with the anatomical shape of the bone defect. Additive manufacturing or three-dimensional (3D) printing is capable of fabricating functional physical components with or without porosity by depositing the materials layer-by-layer using 3D computer models. Therefore, it facilitates the production of advanced bone scaffolds with the feasibility of making changes to the model. This review paper first discusses the development of a computer-aided-design (CAD) approach for the manufacture of bone scaffolds, from the anatomical data acquisition to the final model. It also provides information on the optimization of scaffold's internal architecture, advanced materials, and process parameters to achieve the best biomimetic performance. Furthermore, the review paper describes the advantages and limitations of 3D printing technologies applied to the production of bone tissue scaffolds.
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Affiliation(s)
- Marjan Bahraminasab
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran.
- Department of Tissue Engineering and Applied Cell Sciences, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
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106
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GhavamiNejad A, Ashammakhi N, Wu XY, Khademhosseini A. Crosslinking Strategies for 3D Bioprinting of Polymeric Hydrogels. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2002931. [PMID: 32734720 PMCID: PMC7754762 DOI: 10.1002/smll.202002931] [Citation(s) in RCA: 127] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Indexed: 05/15/2023]
Abstract
Three-dimensional (3D) bioprinting has recently advanced as an important tool to produce viable constructs that can be used for regenerative purposes or as tissue models. To develop biomimetic and sustainable 3D constructs, several important processing aspects need to be considered, among which crosslinking is most important for achieving desirable biomechanical stability of printed structures, which is reflected in subsequent behavior and use of these constructs. In this work, crosslinking methods used in 3D bioprinting studies are reviewed, parameters that affect bioink chemistry are discussed, and the potential toward improving crosslinking outcomes and construct performance is highlighted. Furthermore, current challenges and future prospects are discussed. Due to the direct connection between crosslinking methods and properties of 3D bioprinted structures, this Review can provide a basis for developing necessary modifications to the design and manufacturing process of advanced tissue-like constructs in future.
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Affiliation(s)
- Amin GhavamiNejad
- Advanced Pharmaceutics and Drug Delivery Laboratory, Leslie L. Dan Faculty of Pharmacy, University of Toronto, Toronto, Canada
| | - Nureddin Ashammakhi
- Center for Minimally Invasive Therapeutics, California NanoSystems Institute (CNSI), University of California - Los Angeles, Los Angeles, California, USA
- Department of Radiological Sciences, University of California - Los Angeles, Los Angeles, California, USA
- Department of Bioengineering, University of California - Los Angeles, Los Angeles, California, USA
| | - Xiao Yu Wu
- Advanced Pharmaceutics and Drug Delivery Laboratory, Leslie L. Dan Faculty of Pharmacy, University of Toronto, Toronto, Canada
| | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics, California NanoSystems Institute (CNSI), University of California - Los Angeles, Los Angeles, California, USA
- Department of Radiological Sciences, University of California - Los Angeles, Los Angeles, California, USA
- Department of Bioengineering, University of California - Los Angeles, Los Angeles, California, USA
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, California, USA
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107
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Biomimetic corneal stroma using electro-compacted collagen. Acta Biomater 2020; 113:360-371. [PMID: 32652228 DOI: 10.1016/j.actbio.2020.07.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 07/01/2020] [Accepted: 07/02/2020] [Indexed: 12/14/2022]
Abstract
Engineering substantia propria (or stroma of cornea) that mimics the function and anatomy of natural tissue is vital for in vitro modelling and in vivo regeneration. There are, however, few examples of bioengineered biomimetic corneal stroma. Here we describe the construction of an orthogonally oriented 3D corneal stroma model (3D-CSM) using pure electro-compacted collagen (EC). EC films comprise aligned collagen fibrils and support primary human corneal stromal cells (hCSCs). Cell-laden constructs are analogous to the anatomical structure of native human cornea. The hCSCs are guided by the topographical cues provided by the aligned collagen fibrils of the EC films. Importantly, the 3D-CSM are biodegradable, highly transparent, glucose-permeable and comprise quiescent hCSCs. Gene expression analysis indicated the presence of aligned collagen fibrils is strongly coupled to downregulation of active fibroblast/myofibroblast markers α-SMA and Thy-1, with a concomitant upregulation of the dormant keratocyte marker ALDH3. The 3D-CSM represents the first example of an optimally robust biomimetic engineered corneal stroma that is constructed from pure electro-compacted collagen for cell and tissue support. The 3D-CSM is a significant advance for synthetic corneal stroma engineering, with the potential to be used for full-thickness and functional cornea replacement, as well as informing in vivo tissue regeneration. STATEMENT OF SIGNIFICANCE: This manuscript represents the first example of a robust, transparent, glucose permeable and pure collagen-based biomimetic 3D corneal stromal model (3D-CSM) constructed from pure electro-compacted collagen. The collagen fibrils of 3D-CSM are aligned and orthogonally arranged, mimicking native human corneal stroma. The alignment of collagen fibrils correlates with the direction of current applied for electro-compaction and influences human corneal stromal cell (hCSC) orientation. Moreover, 3D-CSM constructs support a corneal keratocyte phenotype; an essential requirement for modelling healthy corneal stroma. As-prepared 3D-CSM hold great promise as corneal stromal substitutes for research and translation, with the potential to be used for full-thickness cornea replacement.
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108
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Liu H, Zheng G, Cheng X, Yang X, Zhao G. Simulation Analysis of the Influence of Nozzle Structure Parameters on Material Controllability. MICROMACHINES 2020; 11:E826. [PMID: 32878235 PMCID: PMC7570424 DOI: 10.3390/mi11090826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/24/2020] [Accepted: 08/29/2020] [Indexed: 11/16/2022]
Abstract
With the evolution of three-dimensional (3D) printing, many restrictive factors of 3D printing have been explored to upgrade the feasibility of 3D printing technology, such as nozzle structure, print resolution, cell viability, etc., which has attracted extensive attention due to its possibility of curing disease in tissue engineering and organ regeneration. In this paper, we have developed a novel nozzle for 3D printing, numerical simulation, and finite element analysis have been used to optimize the nozzle structure and further clarified the influence of nozzle structure parameters on material controllability. Using novel nozzle structure, we firstly adopt ANSYS-FLUENT to analyze material controllability under the different inner cavity diameter, outer cavity diameter and lead length. Secondly, the orthogonal experiments with the novel nozzle are carried out in order to verify the influence law of inner cavity diameter, outer cavity diameter, and lead length under all sorts of conditions. The experiment results show that the material P diameter can be controlled by changing the parameters. The influence degree of parameters on material P diameter is shown that lead length > inner cavity diameter > outer cavity diameter. Finally, the optimized parameters of nozzle structure have been adjusted to estimate the material P diameter in 3D printing.
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Affiliation(s)
- Huanbao Liu
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; (G.Z.); (X.C.); (G.Z.)
| | - Guangming Zheng
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; (G.Z.); (X.C.); (G.Z.)
| | - Xiang Cheng
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; (G.Z.); (X.C.); (G.Z.)
| | - Xianhai Yang
- Analytical Testing Center, Shandong University of Technology, Zibo 255000, China;
| | - Guangxi Zhao
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255000, China; (G.Z.); (X.C.); (G.Z.)
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109
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Kang MS, Lee SH, Park WJ, Lee JE, Kim B, Han DW. Advanced Techniques for Skeletal Muscle Tissue Engineering and Regeneration. Bioengineering (Basel) 2020; 7:bioengineering7030099. [PMID: 32858848 PMCID: PMC7552709 DOI: 10.3390/bioengineering7030099] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 08/21/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022] Open
Abstract
Tissue engineering has recently emerged as a novel strategy for the regeneration of damaged skeletal muscle tissues due to its ability to regenerate tissue. However, tissue engineering is challenging due to the need for state-of-the-art interdisciplinary studies involving material science, biochemistry, and mechanical engineering. For this reason, electrospinning and three-dimensional (3D) printing methods have been widely studied because they can insert embedded muscle cells into an extracellular-matrix-mimicking microenvironment, which helps the growth of seeded or laden cells and cell signals by modulating cell–cell interaction and cell–matrix interaction. In this mini review, the recent research trends in scaffold fabrication for skeletal muscle tissue regeneration using advanced techniques, such as electrospinning and 3D bioprinting, are summarized. In conclusion, the further development of skeletal muscle tissue engineering techniques may provide innovative results with clinical potential for skeletal muscle regeneration.
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Affiliation(s)
- Moon Sung Kang
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea;
| | - Seok Hyun Lee
- Department of Optics and Mechatronics, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (S.H.L.); (W.J.P.); (J.E.L.)
| | - Won Jung Park
- Department of Optics and Mechatronics, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (S.H.L.); (W.J.P.); (J.E.L.)
| | - Ji Eun Lee
- Department of Optics and Mechatronics, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (S.H.L.); (W.J.P.); (J.E.L.)
| | - Bongju Kim
- Dental Life Science Research Institute & Clinical Translational Research Center for Dental Science, Seoul National University Dental Hospital, Seoul 03080, Korea
- Correspondence: (B.K.); (D.-W.H.)
| | - Dong-Wook Han
- Department of Cogno-Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea;
- Department of Optics and Mechatronics, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, Korea; (S.H.L.); (W.J.P.); (J.E.L.)
- Correspondence: (B.K.); (D.-W.H.)
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110
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Davoodi E, Sarikhani E, Montazerian H, Ahadian S, Costantini M, Swieszkowski W, Willerth S, Walus K, Mofidfar M, Toyserkani E, Khademhosseini A, Ashammakhi N. Extrusion and Microfluidic-based Bioprinting to Fabricate Biomimetic Tissues and Organs. ADVANCED MATERIALS TECHNOLOGIES 2020; 5:1901044. [PMID: 33072855 PMCID: PMC7567134 DOI: 10.1002/admt.201901044] [Citation(s) in RCA: 82] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 03/10/2020] [Indexed: 05/07/2023]
Abstract
Next generation engineered tissue constructs with complex and ordered architectures aim to better mimic the native tissue structures, largely due to advances in three-dimensional (3D) bioprinting techniques. Extrusion bioprinting has drawn tremendous attention due to its widespread availability, cost-effectiveness, simplicity, and its facile and rapid processing. However, poor printing resolution and low speed have limited its fidelity and clinical implementation. To circumvent the downsides associated with extrusion printing, microfluidic technologies are increasingly being implemented in 3D bioprinting for engineering living constructs. These technologies enable biofabrication of heterogeneous biomimetic structures made of different types of cells, biomaterials, and biomolecules. Microfluiding bioprinting technology enables highly controlled fabrication of 3D constructs in high resolutions and it has been shown to be useful for building tubular structures and vascularized constructs, which may promote the survival and integration of implanted engineered tissues. Although this field is currently in its early development and the number of bioprinted implants is limited, it is envisioned that it will have a major impact on the production of customized clinical-grade tissue constructs. Further studies are, however, needed to fully demonstrate the effectiveness of the technology in the lab and its translation to the clinic.
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Affiliation(s)
- Elham Davoodi
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Einollah Sarikhani
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Hossein Montazerian
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Samad Ahadian
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
| | - Marco Costantini
- Biomaterials Group, Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland
- Institute of Physical Chemistry – Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Wojciech Swieszkowski
- Biomaterials Group, Materials Design Division, Faculty of Materials Science and Engineering, Warsaw University of Technology, 00-661 Warsaw, Poland
| | - Stephanie Willerth
- Department of Mechanical Engineering, Division of Medical Sciences, University of Victoria, BC V8P 5C2, Canada
| | - Konrad Walus
- Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Mohammad Mofidfar
- Department of Biomedical Engineering, University of Southern California, Los Angeles, CA 90089, USA
| | - Ehsan Toyserkani
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
| | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, CA 90095, USA
- Department of Radiological Sciences, University of California, Los Angeles, CA 90095, USA
| | - Nureddin Ashammakhi
- Center for Minimally Invasive Therapeutics (C-MIT), University of California, Los Angeles, CA 90095, USA
- Department of Bioengineering, University of California, Los Angeles, CA 90095, USA
- Department of Radiological Sciences, University of California, Los Angeles, CA 90095, USA
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111
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McKay TB, Hutcheon AEK, Guo X, Zieske JD, Karamichos D. Modeling the cornea in 3-dimensions: Current and future perspectives. Exp Eye Res 2020; 197:108127. [PMID: 32619578 PMCID: PMC8116933 DOI: 10.1016/j.exer.2020.108127] [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: 03/22/2020] [Revised: 06/17/2020] [Accepted: 06/23/2020] [Indexed: 02/08/2023]
Abstract
The cornea is an avascular, transparent ocular tissue that serves as a refractive and protective structure for the eye. Over 90% of the cornea is composed of a collagenous-rich extracellular matrix within the stroma with the other 10% composed by the corneal epithelium and endothelium layers and their corresponding supporting collagen layers (e.g., Bowman's and Descemet's membranes) at the anterior and posterior cornea, respectively. Due to its prominent role in corneal structure, tissue engineering approaches to model the human cornea in vitro have focused heavily on the cellular and functional properties of the corneal stroma. In this review, we discuss model development in the context of culture dimensionality (e.g., 2-dimensional versus 3-dimensional) and expand on the optical, biomechanical, and cellular functions promoted by the culture microenvironment. We describe current methods to model the human cornea with focus on organotypic approaches, compressed collagen, bioprinting, and self-assembled stromal models. We also expand on co-culture applications with the inclusion of relevant corneal cell types, such as epithelial, stromal keratocyte or fibroblast, endothelial, and neuronal cells. Further advancements in corneal tissue model development will markedly improve our current understanding of corneal wound healing and regeneration.
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Affiliation(s)
- Tina B McKay
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, 02114, USA
| | - Audrey E K Hutcheon
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, 02114, USA
| | - Xiaoqing Guo
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, 02114, USA
| | - James D Zieske
- Schepens Eye Research Institute of Massachusetts Eye and Ear, Department of Ophthalmology, Harvard Medical School, Boston, MA, 02114, USA
| | - Dimitrios Karamichos
- North Texas Eye Research Institute, University of North Texas Health Science Center, 3500 Camp Bowie Blvd, Fort Worth, TX, 76107, USA; Department of Pharmaceutical Sciences, University of North Texas Health Science Center, 3500 Camp Bowie Blvd, Fort Worth, TX, 76107, USA; Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, 3500 Camp Bowie Blvd, Fort Worth, TX, 76107, USA.
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112
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Datta P, Dey M, Ataie Z, Unutmaz D, Ozbolat IT. 3D bioprinting for reconstituting the cancer microenvironment. NPJ Precis Oncol 2020; 4:18. [PMID: 32793806 PMCID: PMC7385083 DOI: 10.1038/s41698-020-0121-2] [Citation(s) in RCA: 140] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 05/13/2020] [Indexed: 12/30/2022] Open
Abstract
The cancer microenvironment is known for its complexity, both in its content as well as its dynamic nature, which is difficult to study using two-dimensional (2D) cell culture models. Several advances in tissue engineering have allowed more physiologically relevant three-dimensional (3D) in vitro cancer models, such as spheroid cultures, biopolymer scaffolds, and cancer-on-a-chip devices. Although these models serve as powerful tools for dissecting the roles of various biochemical and biophysical cues in carcinoma initiation and progression, they lack the ability to control the organization of multiple cell types in a complex dynamic 3D architecture. By virtue of its ability to precisely define perfusable networks and position of various cell types in a high-throughput manner, 3D bioprinting has the potential to more closely recapitulate the cancer microenvironment, relative to current methods. In this review, we discuss the applications of 3D bioprinting in mimicking cancer microenvironment, their use in immunotherapy as prescreening tools, and overview of current bioprinted cancer models.
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Affiliation(s)
- Pallab Datta
- Centre for Healthcare Science and Technology, Indian Institute of Engineering Science and Technology Shibpur, Howrah, India
| | - Madhuri Dey
- Department of Chemistry, Penn State University, University Park, PA USA
| | - Zaman Ataie
- Engineering Science and Mechanics Department, Penn State University, University Park, PA USA
| | - Derya Unutmaz
- The Jackson Laboratory of Genomics Medicine, Farmington, CT USA
| | - Ibrahim T. Ozbolat
- Engineering Science and Mechanics Department, Penn State University, University Park, PA USA
- The Huck Institutes of the Life Sciences, Penn State University, University Park, PA USA
- Biomedical Engineering Department, Penn State University, University Park, PA USA
- Materials Research Institute, Penn State University, University Park, PA USA
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113
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Corneal Stem Cells as a Source of Regenerative Cell-Based Therapy. Stem Cells Int 2020; 2020:8813447. [PMID: 32765614 PMCID: PMC7388005 DOI: 10.1155/2020/8813447] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/03/2020] [Accepted: 07/10/2020] [Indexed: 12/15/2022] Open
Abstract
In the past few years, intensive research has focused on corneal stem cells as an unlimited source for cell-based therapy in regenerative ophthalmology. Today, it is known that the cornea has at least two types of stem cells: limbal epithelial stem cells (LESCs) and corneal stromal stem cells (CSSCs). LESCs are used for regeneration of corneal surface, while CSSCs are used for regeneration of corneal stroma. Until now, various approaches and methods for isolation of LESCs and CSSCs and their successful transplantation have been described and tested in several preclinical studies and clinical trials. This review describes in detail phenotypic characteristics of LESCs and CSSCs and discusses their therapeutic potential in corneal regeneration. Since efficient and safe corneal stem cell-based therapy is still a challenging issue that requires continuous cooperation between researchers, clinicians, and patients, this review addresses the important limitations and suggests possible strategies for improvement of corneal stem cell-based therapy.
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114
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Scognamiglio C, Soloperto A, Ruocco G, Cidonio G. Bioprinting stem cells: building physiological tissues one cell at a time. Am J Physiol Cell Physiol 2020; 319:C465-C480. [PMID: 32639873 DOI: 10.1152/ajpcell.00124.2020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Bioprinting aims to direct the spatial arrangement in three dimensions of cells, biomaterials, and growth factors. The biofabrication of clinically relevant constructs for the repair or modeling of either diseased or damaged tissues is rapidly advancing, resulting in the ability to three-dimensional (3D) print biomimetic platforms which imitate a large number of tissues in the human body. Primary tissue-specific cells are typically isolated from patients and used for the fabrication of 3D models for drug screening or tissue repair purposes. However, the lack of resilience of these platforms, due to the difficulties in harnessing, processing, and implanting patient-specific cells can limit regeneration ability. The printing of stem cells obviates these hurdles, producing functional in vitro models or implantable constructs. Advancements in biomaterial science are helping the development of inks suitable for the encapsulation and the printing of stem cells, promoting their functional growth and differentiation. This review specifically aims to investigate the most recent studies exploring innovative and functional approaches for the printing of 3D constructs to model disease or repair damaged tissues. Key concepts in tissue physiology are highlighted, reporting stem cell applications in biofabrication. Bioprinting technologies and biomaterial inks are listed and analyzed, including recent advancements in biomaterial design for bioprinting applications, commenting on the influence of biomaterial inks on the encapsulated stem cells. Ultimately, most recent successful efforts and clinical potentials for the manufacturing of functional physiological tissue substitutes are reported here, with a major focus on specific tissues, such as vasculature, heart, lung and airways, liver, bone and muscle.
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Affiliation(s)
| | | | - Giancarlo Ruocco
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Rome, Italy
| | - Gianluca Cidonio
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Rome, Italy
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115
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Fuest M, Yam GHF, Mehta JS, Duarte Campos DF. Prospects and Challenges of Translational Corneal Bioprinting. Bioengineering (Basel) 2020; 7:bioengineering7030071. [PMID: 32640721 PMCID: PMC7552635 DOI: 10.3390/bioengineering7030071] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 07/01/2020] [Accepted: 07/04/2020] [Indexed: 12/13/2022] Open
Abstract
Corneal transplantation remains the ultimate treatment option for advanced stromal and endothelial disorders. Corneal tissue engineering has gained increasing interest in recent years, as it can bypass many complications of conventional corneal transplantation. The human cornea is an ideal organ for tissue engineering, as it is avascular and immune-privileged. Mimicking the complex mechanical properties, the surface curvature, and stromal cytoarchitecure of the in vivo corneal tissue remains a great challenge for tissue engineering approaches. For this reason, automated biofabrication strategies, such as bioprinting, may offer additional spatial control during the manufacturing process to generate full-thickness cell-laden 3D corneal constructs. In this review, we discuss recent advances in bioprinting and biomaterials used for in vitro and ex vivo corneal tissue engineering, corneal cell-biomaterial interactions after bioprinting, and future directions of corneal bioprinting aiming at engineering a full-thickness human cornea in the lab.
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Affiliation(s)
- Matthias Fuest
- Department of Ophthalmology, RWTH Aachen University, 52074 Aachen, Germany
- Correspondence: (M.F.); (D.F.D.C.)
| | - Gary Hin-Fai Yam
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, PA 15260, USA;
| | - Jodhbir S. Mehta
- Tissue Engineering and Stem Cell Group, Singapore Eye Research Institute, Singapore 169856, Singapore;
- Singapore National Eye Centre, Singapore 169856, Singapore
| | - Daniela F. Duarte Campos
- Institute of Applied Medical Engineering, RWTH Aachen University, 52074 Aachen, Germany
- DWI Leibniz Institute for Interactive Materials, 52074 Aachen, Germany
- Correspondence: (M.F.); (D.F.D.C.)
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116
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Chan WW, Yeo DCL, Tan V, Singh S, Choudhury D, Naing MW. Additive Biomanufacturing with Collagen Inks. Bioengineering (Basel) 2020; 7:bioengineering7030066. [PMID: 32630194 PMCID: PMC7552643 DOI: 10.3390/bioengineering7030066] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/22/2020] [Accepted: 06/25/2020] [Indexed: 12/13/2022] Open
Abstract
Collagen is a natural polymer found abundantly in the extracellular matrix (ECM). It is easily extracted from a variety of sources and exhibits excellent biological properties such as biocompatibility and weak antigenicity. Additionally, different processes allow control of physical and chemical properties such as mechanical stiffness, viscosity and biodegradability. Moreover, various additive biomanufacturing technology has enabled layer-by-layer construction of complex structures to support biological function. Additive biomanufacturing has expanded the use of collagen biomaterial in various regenerative medicine and disease modelling application (e.g., skin, bone and cornea). Currently, regulatory hurdles in translating collagen biomaterials still remain. Additive biomanufacturing may help to overcome such hurdles commercializing collagen biomaterials and fulfill its potential for biomedicine.
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Affiliation(s)
- Weng Wan Chan
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
| | - David Chen Loong Yeo
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
| | - Vernice Tan
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
| | - Satnam Singh
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
| | - Deepak Choudhury
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
- Correspondence: (D.C.); (M.W.N.)
| | - May Win Naing
- Biomanufacturing Technology, Bioprocessing Technology Institute (BTI), Agency for Science, Technology and Research (A*STAR), Singapore City 138668, Singapore; (W.W.C.); (D.C.L.Y.); (V.T.); (S.S.)
- Singapore Institute of Manufacturing Technology (SIMTech), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-04, Innovis, Singapore City 138634, Singapore
- Correspondence: (D.C.); (M.W.N.)
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117
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Affiliation(s)
- Matthew L. Bedell
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
| | - Adam M. Navara
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
| | - Yingying Du
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
- Institute of Regulatory Science for Medical Devices, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shengmin Zhang
- Advanced Biomaterials and Tissue Engineering Center, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China
- Institute of Regulatory Science for Medical Devices, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Antonios G. Mikos
- Department of Bioengineering, Rice University, 6500 South Main Street, Houston, Texas 77030, United States
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118
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Yusupov V, Churbanov S, Churbanova E, Bardakova K, Antoshin A, Evlashin S, Timashev P, Minaev N. Laser-induced Forward Transfer Hydrogel Printing: A Defined Route for Highly Controlled Process. Int J Bioprint 2020; 6:271. [PMID: 33094193 PMCID: PMC7562918 DOI: 10.18063/ijb.v6i3.271] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 03/16/2020] [Indexed: 12/25/2022] Open
Abstract
Laser-induced forward transfer is a versatile, non-contact, and nozzle-free printing technique which has demonstrated high potential for different printing applications with high resolution. In this article, three most widely used hydrogels in bioprinting (2% hyaluronic acid sodium salt, 1% methylcellulose, and 1% sodium alginate) were used to study laser printing processes. For this purpose, the authors applied a laser system based on a pulsed infrared laser (1064 nm wavelength, 8 ns pulse duration, 1 – 5 J/cm2 laser fluence, and 30 μm laser spot size). A high-speed shooting showed that the increase in fluence caused a sequential change in the transfer regimes: No transfer regime, optimal jetting regime with a single droplet transfer, high speed regime, turbulent regime, and plume regime. It was demonstrated that in the optimal jetting regime, which led to printing with single droplets, the size and volume of droplets transferred to the acceptor slide increased almost linearly with the increase of laser fluence. It was also shown that the maintenance of a stable temperature (±2°C) allowed for neglecting the temperature-induced viscosity change of hydrogels. It was determined that under room conditions (20°C, humidity 50%), the hydrogel layer, due to drying processes, decreased with a speed of about 8 μm/min, which could lead to a temporal variation of the transfer process parameters. The authors developed a practical algorithm that allowed quick configuration of the laser printing process on an applied experimental setup. The configuration is provided by the change of the easily tunable parameters: Laser pulse energy, laser spot size, the distance between the donor ribbon and acceptor plate, as well as the thickness of the hydrogel layer on the donor ribbon slide.
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Affiliation(s)
- Vladimir Yusupov
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia
| | - Semyon Churbanov
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia.,Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 8-2 Trubetskaya st., Moscow, 119991, Russia
| | - Ekaterina Churbanova
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia
| | - Ksenia Bardakova
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia.,Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 8-2 Trubetskaya st., Moscow, 119991, Russia
| | - Artem Antoshin
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia.,Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 8-2 Trubetskaya st., Moscow, 119991, Russia
| | - Stanislav Evlashin
- Center for Design Manufacturing and Materials, Skolkovo Institute of Science and Technology, Bolshoy Boulevard 30, Bld. 1, Moscow, 121205, Russia
| | - Peter Timashev
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia.,Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 8-2 Trubetskaya st., Moscow, 119991, Russia.,Department of Polymers and Composites, N.N.Semenov Institute of Chemical Physics, 4 Kosygin St., Moscow, 119991, Russia.,Department of Chemistry, Lomonosov Moscow State University, Leninskiye Gory 1‑3, Moscow 119991, Russia
| | - Nikita Minaev
- Institute of Photon Technologies, Federal Scientific Research Centre "Crystallography and Photonics," Russian Academy of Sciences, Pionerskaya 2, Troitsk, Moscow, 108840, Russia
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119
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Anton-Sales I, D'Antin JC, Fernández-Engroba J, Charoenrook V, Laromaine A, Roig A, Michael R. Bacterial nanocellulose as a corneal bandage material: a comparison with amniotic membrane. Biomater Sci 2020; 8:2921-2930. [PMID: 32314754 DOI: 10.1039/d0bm00083c] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Corneal trauma and ulcerations are leading causes of corneal blindness around the world. These lesions require attentive medical monitoring since improper healing or infection has serious consequences in vision and quality of life. Amniotic membrane grafts represent the common solution to treat severe corneal wounds. However, amniotic membrane's availability remains limited by the dependency on donor tissues, its high price and short shelf life. Consequently, there is an active quest for biomaterials to treat injured corneal tissues. Nanocellulose synthetized by bacteria (BNC) is an emergent biopolymer with vast clinical potential for skin tissue regeneration. BNC also exhibits appealing characteristics to act as an alternative corneal bandage such as; high liquid holding capacity, biocompatibility, flexibility, natural - but animal free-origin and a myriad of functionalization opportunities. Here, we present an initial study aiming at testing the suitability of BNC as corneal bandage regarding preclinical requirements and using amniotic membrane as a benchmark. Bacterial nanocellulose exhibits higher mechanical resistance to sutures and slightly longer stability under in vitro and ex vivo simulated physiological conditions than amniotic membrane. Additionally, bacterial nanocellulose offers good conformability to the shape of the eye globe and easy manipulation in medical settings. These excellent attributes accompanied by the facts that bacterial nanocellulose is stable at room temperature for long periods, can be heat-sterilized and is easy to produce, reinforce the potential of bacterial nanocellulose as a more accessible ocular surface bandage.
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120
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Nicolas J, Magli S, Rabbachin L, Sampaolesi S, Nicotra F, Russo L. 3D Extracellular Matrix Mimics: Fundamental Concepts and Role of Materials Chemistry to Influence Stem Cell Fate. Biomacromolecules 2020; 21:1968-1994. [PMID: 32227919 DOI: 10.1021/acs.biomac.0c00045] [Citation(s) in RCA: 268] [Impact Index Per Article: 67.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Synthetic 3D extracellular matrices (ECMs) find application in cell studies, regenerative medicine, and drug discovery. While cells cultured in a monolayer may exhibit unnatural behavior and develop very different phenotypes and genotypes than in vivo, great efforts in materials chemistry have been devoted to reproducing in vitro behavior in in vivo cell microenvironments. This requires fine-tuning the biochemical and structural actors in synthetic ECMs. This review will present the fundamentals of the ECM, cover the chemical and structural features of the scaffolds used to generate ECM mimics, discuss the nature of the signaling biomolecules required and exploited to generate bioresponsive cell microenvironments able to induce a specific cell fate, and highlight the synthetic strategies involved in creating functional 3D ECM mimics.
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Affiliation(s)
- Julien Nicolas
- Université Paris-Saclay, CNRS, Institut Galien Paris-Saclay, , 92296 Châtenay-Malabry, France
| | - Sofia Magli
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, 20126 Milan, Italy
| | - Linda Rabbachin
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, 20126 Milan, Italy
| | - Susanna Sampaolesi
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, 20126 Milan, Italy
| | - Francesco Nicotra
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, 20126 Milan, Italy
| | - Laura Russo
- University of Milano-Bicocca, Department of Biotechnology and Biosciences, Piazza della Scienza 2, 20126 Milan, Italy
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121
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Chen L, Yan D, Wu N, Zhang W, Yan C, Yao Q, Zouboulis CC, Sun H, Fu Y. 3D-Printed Poly-Caprolactone Scaffolds Modified With Biomimetic Extracellular Matrices for Tarsal Plate Tissue Engineering. Front Bioeng Biotechnol 2020; 8:219. [PMID: 32269990 PMCID: PMC7109479 DOI: 10.3389/fbioe.2020.00219] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 03/04/2020] [Indexed: 11/19/2022] Open
Abstract
Tarsal plate regeneration has always been a challenge in the treatment of eyelid defects. The commonly used clinical treatments such as hard palate mucosa grafts cannot achieve satisfactory repair effects. Tissue engineering has been considered as a promising technology. However, tarsal plate tissue engineering is difficult to achieve due to its complex structure and lipid secretion function. Three-dimensional (3D) printing technology has played a revolutionary role in tissue engineering because it can fabricate complex scaffolds through computer aided design (CAD). In this study, it was novel in applying 3D printing technology to the fabrication of tarsal plate scaffolds using poly-caprolactone (PCL). The decellularized matrix of adipose-derived mesenchymal stromal cells (DMA) was coated on the surface of the scaffold, and its biofunction was further studied. Immortalized human SZ95 sebocytes were seeded on the scaffolds so that neutral lipids were secreted for replacing meibocytes. In vitro experiments revealed excellent biocompatibility of DMA-PCL scaffolds with sebocytes. In vivo experiments revealed excellent sebocytes proliferation on the DMA-PCL scaffolds. Meanwhile, sebocytes seeded on the scaffolds secreted abundant neutral lipid in vitro and in vivo. In conclusion, a 3D-printed PCL scaffold modified with DMA was found to be a promising substitute for tarsal plate tissue engineering.
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Affiliation(s)
- Liangbo Chen
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Dan Yan
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Nianxuan Wu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Weijie Zhang
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Chenxi Yan
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Qinke Yao
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Christos C. Zouboulis
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane, Dessau, Germany
| | - Hao Sun
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Yao Fu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
- Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
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122
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Deo KA, Singh KA, Peak CW, Alge DL, Gaharwar AK. Bioprinting 101: Design, Fabrication, and Evaluation of Cell-Laden 3D Bioprinted Scaffolds. Tissue Eng Part A 2020; 26:318-338. [PMID: 32079490 PMCID: PMC7480731 DOI: 10.1089/ten.tea.2019.0298] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 02/11/2020] [Indexed: 12/19/2022] Open
Abstract
3D bioprinting is an additive manufacturing technique that recapitulates the native architecture of tissues. This is accomplished through the precise deposition of cell-containing bioinks. The spatiotemporal control over bioink deposition permits for improved communication between cells and the extracellular matrix, facilitates fabrication of anatomically and physiologically relevant structures. The physiochemical properties of bioinks, before and after crosslinking, are crucial for bioprinting complex tissue structures. Specifically, the rheological properties of bioinks determines printability, structural fidelity, and cell viability during the printing process, whereas postcrosslinking of bioinks are critical for their mechanical integrity, physiological stability, cell survival, and cell functions. In this review, we critically evaluate bioink design criteria, specifically for extrusion-based 3D bioprinting techniques, to fabricate complex constructs. The effects of various processing parameters on the biophysical and biochemical characteristics of bioinks are discussed. Furthermore, emerging trends and future directions in the area of bioinks and bioprinting are also highlighted. Graphical abstract [Figure: see text] Impact statement Extrusion-based 3D bioprinting is an emerging additive manufacturing approach for fabricating cell-laden tissue engineered constructs. This review critically evaluates bioink design criteria to fabricate complex tissue constructs. Specifically, pre- and post-printing evaluation approaches are described, as well as new research directions in the field of bioink development and functional bioprinting are highlighted.
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Affiliation(s)
- Kaivalya A. Deo
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas
| | - Kanwar Abhay Singh
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas
| | - Charles W. Peak
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas
| | - Daniel L. Alge
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas
- Materials Science and Engineering, College of Engineering, Texas A&M University, College Station, Texas
| | - Akhilesh K. Gaharwar
- Biomedical Engineering, College of Engineering, Texas A&M University, College Station, Texas
- Materials Science and Engineering, College of Engineering, Texas A&M University, College Station, Texas
- Center for Remote Health Technologies and Systems, Texas A&M University, College Station, Texas
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123
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Marquez A, Gómez-Fontela M, Lauzurica S, Candorcio-Simón R, Munoz-Martin D, Morales M, Ubago M, Toledo C, Lauzurica P, Molpeceres C. Fluorescence enhanced BA-LIFT for single cell detection and isolation. Biofabrication 2020; 12:025019. [DOI: 10.1088/1758-5090/ab6138] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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124
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Ramos T, Moroni L. Tissue Engineering and Regenerative Medicine 2019: The Role of Biofabrication-A Year in Review. Tissue Eng Part C Methods 2020; 26:91-106. [PMID: 31856696 DOI: 10.1089/ten.tec.2019.0344] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Despite its relative youth, biofabrication is unceasingly expanding by assimilating the contributions from various disciplinary areas and their technological advances. Those developments have spawned the range of available options to produce structures with complex geometries while accurately manipulating and controlling cell behavior. As it evolves, biofabrication impacts other research fields, allowing the fabrication of tissue models of increased complexity that more closely resemble the dynamics of living tissue. The recent blooming and evolutions in biofabrication have opened new windows and perspectives that could aid the translational struggle in tissue engineering and regenerative medicine (TERM) applications. Based on similar methodologies applied in past years' reviews, we identified the most high-impact publications and reviewed the major concepts, findings, and research outcomes in the context of advancement beyond the state-of-the-art in the field. We first aim to clarify the confusion in terminology and concepts in biofabrication to therefore introduce the striking evolutions in three-dimensional and four-dimensional bioprinting of tissues. We conclude with a short discussion on the future outlooks for innovation that biofabrication could bring to TERM research.
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Affiliation(s)
- Tiago Ramos
- Institute of Ophthalmology, University College of London, London, United Kingdom
| | - Lorenzo Moroni
- Complex Tissue Regeneration Department, MERLN Institute for Technology-Inspired Regenerative Medicine, Maastricht University, Maastricht, the Netherlands
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Gantumur E, Nakahata M, Kojima M, Sakai S. Extrusion-Based Bioprinting through Glucose-Mediated Enzymatic Hydrogelation. Int J Bioprint 2020; 6:250. [PMID: 32596552 PMCID: PMC7294691 DOI: 10.18063/ijb.v6i1.250] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 01/02/2020] [Indexed: 12/25/2022] Open
Abstract
We report an extrusion-based bioprinting approach, in which stabilization of extruded bioink is achieved through horseradish peroxidase (HRP)-catalyzed cross-linking consuming hydrogen peroxide (H2O2) supplied from HRP and glucose. The bioinks containing living cells, HRP, glucose, alginate possessing phenolic hydroxyl (Ph) groups, and cellulose nanofiber were extruded to fabricate 3D hydrogel constructs. Lattice- and human nose-shaped 3D constructs were successfully printed and showed good stability in cell culture medium for over a week. Mouse 10T1/2 fibroblasts enclosed in the printed constructs remained viable after 7 days of culture. It was also able to switch a non-cell-adhesive surface of the printed construct to cell-adhesive surface for culturing cells on it through a subsequent cross-linking of gelatin possessing Ph moieties. These results demonstrate the possibility of utilizing the presented cross-linking method for 3D bioprinting.
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Affiliation(s)
- Enkhtuul Gantumur
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Masaki Nakahata
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Masaru Kojima
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - Shinji Sakai
- Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
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Feng H, Li X, Deng X, Li X, Guo J, Ma K, Jiang B. The lamellar structure and biomimetic properties of a fish scale matrix. RSC Adv 2020; 10:875-885. [PMID: 35494441 PMCID: PMC9046992 DOI: 10.1039/c9ra08189e] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/10/2019] [Indexed: 02/05/2023] Open
Abstract
The chemical composition of scaffolds is similar to the extracellular matrix of the target tissue, but sometimes scaffolds cannot meet the special functional requirements for the initial stage of engineering tissue, such as mechanical and optical properties. Bionic scaffolds require certain levels of supramolecular structure, textile structure and liquid crystal structure. Here, we will focus our attention on animal tissues with a similar high-level structure to that of the target organization and we hope to achieve the desired results through new technical means. In this study, we have developed a method to obtain a fish scale lamellar matrix from grass carp scales. The fine structure of the scale matrix has been studied, and it was found that the grass carp scale matrix is a textured structure consisting of multiple collagen sheets, which have a double-twisted spiral structure similar to a liquid crystal, thus correcting the literature reports of a single twisted spiral structure. Interestingly, this structure has many similarities with the cornea, cementum and tibial matrix. At the same time, the correlation between the etching time and the optical properties of the scaffold was also studied, and the scale matrix can reach light transmission and refraction levels similar to those of the corneal stroma. Moreover, the matrix has good mechanical properties, in vitro anti-enzymatic abilities and compatibility with human corneal epithelial cells. Therefore, this kind of scaffold material and preparation method, with a lamellar structure and special physical parameters, may provide new hope for corneal prosthesis.
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Affiliation(s)
- Huanhuan Feng
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xia Li
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xiaoming Deng
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Xiaolei Li
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Jitong Guo
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
| | - Ke Ma
- Ophthalmology Department, West China Hospital, Sichuan University Chengdu 610041 P. R. China
| | - Bo Jiang
- National Engineering Research Center for Biomaterials, Sichuan University Chengdu 610065 P. R. China +8628-85412848 +8628-85415977
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Vurat MT, Ergun C, Elçin AE, Elçin YM. 3D Bioprinting of Tissue Models with Customized Bioinks. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1249:67-84. [PMID: 32602091 DOI: 10.1007/978-981-15-3258-0_5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The ordered assembly of multicellular structures mimicking native tissues has lately come into prominence for various applications of biomedicine. In this respect, three-dimensional bioprinting (3DP) of cells and other biologics through additive manufacturing techniques has brought the possibility to develop functional in vitro tissue models and perhaps creating de novo transplantable tissues or organs in time. Bioinks, which can be defined as the printable analogues of the extracellular matrix, represent the foremost component of 3DP. In this chapter, we attempt to elaborate the major classes of bioinks which are prevalently being evaluated for the 3DP of a wide range of tissue models.
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Affiliation(s)
- Murat Taner Vurat
- Biovalda Health Technologies, Inc., Ankara, Turkey
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey
| | - Can Ergun
- Biovalda Health Technologies, Inc., Ankara, Turkey
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey
| | - Ayşe Eser Elçin
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, and Ankara University Stem Cell Institute, Ankara, Turkey
| | - Yaşar Murat Elçin
- Biovalda Health Technologies, Inc., Ankara, Turkey.
- Tissue Engineering, Biomaterials and Nanobiotechnology Laboratory, Ankara University Faculty of Science, Ankara, Turkey.
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Kilic Bektas C, Hasirci V. Cell loaded 3D bioprinted GelMA hydrogels for corneal stroma engineering. Biomater Sci 2020; 8:438-449. [DOI: 10.1039/c9bm01236b] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Tissue engineering aims to replace missing or damaged tissues and restore their functions.
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Affiliation(s)
- Cemile Kilic Bektas
- Department of Biological Sciences
- Middle East Technical University (METU)
- Ankara
- Turkey
- Department of Biotechnology
| | - Vasif Hasirci
- Department of Biological Sciences
- Middle East Technical University (METU)
- Ankara
- Turkey
- Department of Biotechnology
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Chen Y, Xiong X, Liu X, Cui R, Wang C, Zhao G, Zhi W, Lu M, Duan K, Weng J, Qu S, Ge J. 3D Bioprinting of shear-thinning hybrid bioinks with excellent bioactivity derived from gellan/alginate and thixotropic magnesium phosphate-based gels. J Mater Chem B 2020; 8:5500-5514. [DOI: 10.1039/d0tb00060d] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A novel shear-thinning hybrid bioink with good printability, mechanical support, biocompatibility, and bioactivity was developed by combining gellan gum, sodium alginate, and thixotropic magnesium phosphate-based gel (GG–SA/TMP-BG).
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Kilic Bektas C, Hasirci V. Cell Loaded GelMA:HEMA IPN hydrogels for corneal stroma engineering. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2019; 31:2. [PMID: 31811387 DOI: 10.1007/s10856-019-6345-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 11/16/2019] [Indexed: 06/10/2023]
Abstract
Stroma is the main refractive element of the cornea and damage to it is one of the main causes of blindness. In this study, cell loaded hydrogels of methacrylated gelatin (GelMA) and poly(2-hydroxyethyl methacrylate) (pHEMA) (8:2) interpenetrating network (IPN) hydrogels were prepared as the corneal stroma substitute and tested in situ and in vitro. Compressive modulus of the GelMA hydrogels was significantly enhanced with the addition of pHEMA in the structure (6.53 vs 155.49 kPa, respectively). More than 90% of the stromal keratocytes were viable in the GelMA and GelMA-HEMA hydrogels as calculated by Live-Dead Assay and NIH Image-J program. Cells synthesized representative collagens and proteoglycans in the hydrogels indicating that they preserved their keratocyte functions. Transparency of the cell loaded GelMA-HEMA hydrogels was increased significantly up to 90% at 700 nm during three weeks of incubation and was comparable with the transparency of native cornea. Cell loaded GelMA-HEMA corneal stroma model is novel and reported for the first time in the literature in terms of introduction of cells during the preparation phase of the hydrogels. The appropriate mechanical strength and high transparency of the cell loaded constructs indicates a viable alternative to the current devices used in the treatment of corneal blindness.
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Affiliation(s)
- Cemile Kilic Bektas
- Department of Biological Sciences, Middle East Technical University (METU), Ankara, Turkey
- Department of Biotechnology, METU, Ankara, Turkey
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey
| | - Vasif Hasirci
- Department of Biological Sciences, Middle East Technical University (METU), Ankara, Turkey.
- Department of Biotechnology, METU, Ankara, Turkey.
- BIOMATEN, METU Center of Excellence in Biomaterials and Tissue Engineering, Ankara, Turkey.
- Department of Medical Engineering, Acıbadem Mehmet Ali Aydınlar University, Istanbul, Turkey.
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132
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Li NT, Rodenhizer D, Mou J, Shahaj A, Samardzic K, McGuigan AP. Development of a bioprinting approach for automated manufacturing of multi-cell type biocomposite TRACER strips using contact capillary-wicking. Biofabrication 2019; 12:015001. [PMID: 31553953 DOI: 10.1088/1758-5090/ab47e8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In many types of solid cancer, interactions between tumour cells and their surrounding microenvironment significantly impact disease progression, and patient prognosis. Tissue engineered models permit investigations of cellular behaviour and interactions in the context of this diseased microenvironment. Previously our group developed the tissue roll for analysis of cellular environment and response (TRACER) platform. To improve the manufacturing robustness of the TRACER platform and to enhance its use for studies involving multiple cell types, we have developed a bioprinting process that deposits cell-laden collagen hydrogel into a thin cellulose scaffolding sheet though a contact-wicking printing process. Printed scaffolds can then be assembled into layered 3D cultures where the location of cells in 3D is dependent on their printed position in the 2D sheet. After a desired culture time 3D TRACERs can be disassembled to easily assess printed cell re-location and phenotype within the heterogeneous microenvironments of the 3D tissue. In our bioprinting manufacturing process, cells are printed into scaffolding sheets, using a modified 3D bioprinter to extrude cells encapsulated in unmodified collagen hydrogel through a polydimethylsiloxane (PDMS) printer extrusion nozzle. This nozzle design reproducibly generated bioink deposition profiles in the scaffold without causing significant cellular damage or compromising scaffold integrity. We assessed print pattern quality and reproducibility and demonstrated printing of co-culture strips containing tumour cells and fibroblasts in separate compartments (i.e. separate TRACER layers). This printing approach will potentially enable adoption of the TRACER platform to the broader community to better understand multi-cell type interactions in 3D tumours and tissues.
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Affiliation(s)
- Nancy T Li
- University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College St. Toronto, ON M5S 3E5, Canada
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Salaris F, Colosi C, Brighi C, Soloperto A, de Turris V, Benedetti MC, Ghirga S, Rosito M, Di Angelantonio S, Rosa A. 3D Bioprinted Human Cortical Neural Constructs Derived from Induced Pluripotent Stem Cells. J Clin Med 2019; 8:E1595. [PMID: 31581732 PMCID: PMC6832547 DOI: 10.3390/jcm8101595] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/23/2019] [Accepted: 09/24/2019] [Indexed: 01/17/2023] Open
Abstract
Bioprinting techniques use bioinks made of biocompatible non-living materials and cells to build 3D constructs in a controlled manner and with micrometric resolution. 3D bioprinted structures representative of several human tissues have been recently produced using cells derived by differentiation of induced pluripotent stem cells (iPSCs). Human iPSCs can be differentiated in a wide range of neurons and glia, providing an ideal tool for modeling the human nervous system. Here we report a neural construct generated by 3D bioprinting of cortical neurons and glial precursors derived from human iPSCs. We show that the extrusion-based printing process does not impair cell viability in the short and long term. Bioprinted cells can be further differentiated within the construct and properly express neuronal and astrocytic markers. Functional analysis of 3D bioprinted cells highlights an early stage of maturation and the establishment of early network activity behaviors. This work lays the basis for generating more complex and faithful 3D models of the human nervous systems by bioprinting neural cells derived from iPSCs.
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Affiliation(s)
- Federico Salaris
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy;
| | - Cristina Colosi
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Carlo Brighi
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Alessandro Soloperto
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Valeria de Turris
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Maria Cristina Benedetti
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy;
| | - Silvia Ghirga
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Maria Rosito
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
| | - Silvia Di Angelantonio
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
- Department of Physiology and Pharmacology, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy
| | - Alessandro Rosa
- Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy; (F.S.); (C.C.); (C.B.); (A.S.); (V.d.T.); (S.G.); (M.R.)
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy;
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Pushkin AV, Mazur MM, Sirotkin AA, Firsov VV, Potemkin FV. Powerful 3-μm lasers acousto-optically Q-switched with KYW and KGW crystals. OPTICS LETTERS 2019; 44:4837-4840. [PMID: 31568455 DOI: 10.1364/ol.44.004837] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 08/31/2019] [Indexed: 06/10/2023]
Abstract
We report, to the best of our knowledge, the first use of KY(WO4)2 and KG(WO4) acousto-optical Q-switches in 3-μm powerful lasers. Q-switches of two different designs (normal incidence with antireflection coatings, and Brewster-angle cut crystals) operate in lasers based on Er:YAG, Cr:Yb:Ho:YSGG, and Cr:Er:YSGG laser crystals. Gain and lifetime of laser crystals significantly influence the regime of Q-switched generation. Er:YAG and Cr:Yb:Ho:YSGG lasers deliver pulses with 10.8 mJ and 17.5 mJ energy, respectively. Pulses with energy of 29.6 mJ and duration of 75 ns in the TEM00 mode are obtained in a Cr:Er:YSGG laser. The energy is scaled up to 85.7 mJ in the two-stage master oscillator power amplifier system. Powerful laser systems of this kind are in the region of interest for pumping other mid-IR laser media (e.g., Fe:ZnSe and Fe:CdSe), OPOs, CO2 lasers, and amplifiers. Preliminary experiments on microstructuring of transparent materials by the laser-induced backside wet etching method demonstrate the potential of such lasers to build the foundation for dye-free tissue and cell engineering concepts.
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Koivusalo L, Kauppila M, Samanta S, Parihar VS, Ilmarinen T, Miettinen S, Oommen OP, Skottman H. Tissue adhesive hyaluronic acid hydrogels for sutureless stem cell delivery and regeneration of corneal epithelium and stroma. Biomaterials 2019; 225:119516. [PMID: 31574405 DOI: 10.1016/j.biomaterials.2019.119516] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 09/21/2019] [Indexed: 01/05/2023]
Abstract
Regeneration of a severely damaged cornea necessitates the delivery of both epithelium-renewing limbal epithelial stem cells (LESCs) and stroma-repairing cells, such as human adipose-derived stem cells (hASCs). Currently, limited strategies exist for the delivery of these therapeutic cells with tissue-like cellular organization. With the added risks related to suturing of corneal implants, there is a pressing need to develop new tissue adhesive biomaterials for corneal regeneration. To address these issues, we grafted dopamine moieties into hydrazone-crosslinked hyaluronic acid (HA-DOPA) hydrogels to impart tissue adhesive properties and facilitate covalent surface modification of the gels with basement membrane proteins or peptides. We achieved tissue-like cellular compartmentalization in the implants by encapsulating hASCs inside the hydrogels, with subsequent conjugation of thiolated collagen IV or laminin peptides and LESC seeding on the hydrogel surface. The encapsulated hASCs in HA-DOPA gels exhibited good proliferation and cell elongation, while the LESCs expressed typical limbal epithelial progenitor markers. Importantly, the compartmentalized HA-DOPA implants displayed excellent tissue adhesion upon implantation in a porcine corneal organ culture model. These results encourage sutureless implantation of functional stem cells as the next generation of corneal regeneration.
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Affiliation(s)
- Laura Koivusalo
- Eye Regeneration Group, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33520, Finland
| | - Maija Kauppila
- Eye Regeneration Group, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33520, Finland
| | - Sumanta Samanta
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33720, Finland
| | - Vijay Singh Parihar
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33720, Finland
| | - Tanja Ilmarinen
- Eye Regeneration Group, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33520, Finland
| | - Susanna Miettinen
- Adult Stem Cell Group, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Finland & Research, Development and Innovation Centre, Tampere University Hospital, Tampere, 33520, Finland
| | - Oommen P Oommen
- Bioengineering and Nanomedicine Lab, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33720, Finland.
| | - Heli Skottman
- Eye Regeneration Group, Faculty of Medicine and Health Technology and BioMediTech Institute, Tampere University, Tampere, 33520, Finland.
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Abstract
The corneal stroma comprises 90% of the corneal thickness and is critical for the cornea's transparency and refractive function necessary for vision. When the corneal stroma is altered by disease, injury, or scarring, however, an irreversible loss of transparency can occur. Corneal stromal pathology is the cause of millions of cases of blindness globally, and although corneal transplantation is the standard therapy, a severe global deficit of donor corneal tissue and eye banking infrastructure exists, and is unable to meet the overwhelming need. An alternative approach is to harness the endogenous regenerative ability of the corneal stroma, which exhibits self-renewal of the collagenous extracellular matrix under appropriate conditions. To mimic endogenous stromal regeneration, however, is a challenge. Unlike the corneal epithelium and endothelium, the corneal stroma is an exquisitely organized extracellular matrix containing stromal cells, proteoglycans and corneal nerves that is difficult to recapitulate in vitro. Nevertheless, much progress has recently been made in developing stromal equivalents, and in this review the most recent approaches to stromal regeneration therapy are described and discussed. Novel approaches for stromal regeneration include human or animal corneal and/or non-corneal tissue that is acellular or is decellularized and/or re-cellularized, acellular bioengineered stromal scaffolds, tissue adhesives, 3D bioprinting and stromal stem cell therapy. This review highlights the techniques and advances that have achieved first clinical use or are close to translation for eventual therapeutic application in repairing and regenerating the corneal stroma, while the potential of these novel therapies for achieving effective stromal regeneration is discussed.
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Affiliation(s)
- Neil Lagali
- Department of Ophthalmology, Institute for Clinical and Experimental Medicine, Faculty of Medicine, Linköping University, Linköping, Sweden.,Department of Ophthalmology, Sørlandet Hospital Arendal, Arendal, Norway
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Antoshin A, Churbanov S, Minaev N, Zhang D, Zhang Y, Shpichka A, Timashev P. LIFT-bioprinting, is it worth it? ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.bprint.2019.e00052] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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139
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Salaris F, Rosa A. Construction of 3D in vitro models by bioprinting human pluripotent stem cells: Challenges and opportunities. Brain Res 2019; 1723:146393. [PMID: 31425681 DOI: 10.1016/j.brainres.2019.146393] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/11/2019] [Accepted: 08/14/2019] [Indexed: 12/26/2022]
Abstract
Three-dimensional (3D) printing of biological material, or 3D bioprinting, is a rapidly expanding field with interesting applications in tissue engineering and regenerative medicine. Bioprinters use cells and biocompatible materials as an ink (bioink) to build 3D structures representative of organs and tissues, in a controlled manner and with micrometric resolution. Human embryonic (hESCs) and induced (hiPSCs) pluripotent stem cells are ideally able to provide all cell types found in the human body. A limited, but growing, number of recent reports suggest that cells derived by differentiation of hESCs and hiPSCs can be used as building blocks in bioprinted human 3D models, reproducing the cellular variety and cytoarchitecture of real tissues. In this review we will illustrate these examples, which include hepatic, cardiac, vascular, corneal and cartilage tissues, and discuss challenges and opportunities of bioprinting more demanding cell types, such as neurons, obtained from human pluripotent stem cells.
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Affiliation(s)
- Federico Salaris
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy
| | - Alessandro Rosa
- Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, P.le A. Moro 5, 00185 Rome, Italy; Center for Life Nano Science, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161 Rome, Italy.
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Vattulainen M, Ilmarinen T, Koivusalo L, Viiri K, Hongisto H, Skottman H. Modulation of Wnt/BMP pathways during corneal differentiation of hPSC maintains ABCG2-positive LSC population that demonstrates increased regenerative potential. Stem Cell Res Ther 2019; 10:236. [PMID: 31383008 PMCID: PMC6683518 DOI: 10.1186/s13287-019-1354-2] [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: 06/25/2019] [Revised: 07/19/2019] [Accepted: 07/22/2019] [Indexed: 12/20/2022] Open
Abstract
Background The differentiation of corneal limbal stem cells (LSCs) from human pluripotent stem cells (hPSCs) has great power as a novel treatment for ocular surface reconstruction and for modeling corneal epithelial renewal. However, the lack of profound understanding of the true LSC population identity and the regulation of LSC homeostasis is hindering the full therapeutic potential of hPSC-derived LSCs as well as primary LSCs. Methods The differentiation trajectory of two distinct hPSC lines towards LSCs was characterized extensively using immunofluorescence labeling against pluripotency, putative LSC, and mature corneal epithelium markers. Cell counting, flow cytometry, and qRT-PCR were used to quantify the differences between distinct populations observed at day 11 and day 24 time points. Initial differentiation conditions were thereafter modified to support the maintenance and expansion of the earlier population expressing ABCG2. Immunofluorescence, qRT-PCR, population doubling analyses, and transplantation into an ex vivo porcine cornea model were used to analyze the phenotype and functionality of the cell populations cultured in different conditions. Results The detailed characterization of the hPSC differentiation towards LSCs revealed only transient expression of a cell population marked by the universal stemness marker and proposed LSC marker ABCG2. Within the ABCG2-positive population, we further identified two distinct subpopulations of quiescent ∆Np63α-negative and proliferative ∆Np63α-positive cells, the latter of which also expressed the acknowledged intestinal stem cell marker and suggested LSC marker LGR5. These populations that appeared early during the differentiation process had stem cell phenotypes distinct from the later arising ABCG2-negative, ∆Np63α-positive third cell population. Importantly, novel culture conditions modulating the Wnt and BMP signaling pathways allowed efficient maintenance and expansion of the ABCG2-positive populations. In comparison to ∆Np63α-positive hPSC-LSCs cultured in the initial culture conditions, ABCG2-positive hPSC-LSCs in the novel maintenance condition contained quiescent stem cells marked by p27, demonstrated notably higher population doubling capabilities and clonal growth in an in vitro colony-forming assay, and increased regenerative potential in the ex vivo transplantation model. Conclusions The distinct cell populations identified during the hPSC-LSC differentiation and ABCG2-positive LSC maintenance may represent functionally different limbal stem/progenitor cells with implications for regenerative efficacy. Electronic supplementary material The online version of this article (10.1186/s13287-019-1354-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Meri Vattulainen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - Tanja Ilmarinen
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - Laura Koivusalo
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland
| | - Keijo Viiri
- Tampere Center for Child Health Research, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Heidi Hongisto
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland.,Department of Ophthalmology, Institute of Clinical Medicine, University of Eastern Finland, Kuopio, Finland
| | - Heli Skottman
- Faculty of Medicine and Health Technology, Tampere University, Arvo Ylpön katu 34, 33520, Tampere, Finland.
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141
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Tamay DG, Dursun Usal T, Alagoz AS, Yucel D, Hasirci N, Hasirci V. 3D and 4D Printing of Polymers for Tissue Engineering Applications. Front Bioeng Biotechnol 2019; 7:164. [PMID: 31338366 PMCID: PMC6629835 DOI: 10.3389/fbioe.2019.00164] [Citation(s) in RCA: 178] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 06/21/2019] [Indexed: 12/18/2022] Open
Abstract
Three-dimensional (3D) and Four-dimensional (4D) printing emerged as the next generation of fabrication techniques, spanning across various research areas, such as engineering, chemistry, biology, computer science, and materials science. Three-dimensional printing enables the fabrication of complex forms with high precision, through a layer-by-layer addition of different materials. Use of intelligent materials which change shape or color, produce an electrical current, become bioactive, or perform an intended function in response to an external stimulus, paves the way for the production of dynamic 3D structures, which is now called 4D printing. 3D and 4D printing techniques have great potential in the production of scaffolds to be applied in tissue engineering, especially in constructing patient specific scaffolds. Furthermore, physical and chemical guidance cues can be printed with these methods to improve the extent and rate of targeted tissue regeneration. This review presents a comprehensive survey of 3D and 4D printing methods, and the advantage of their use in tissue regeneration over other scaffold production approaches.
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Affiliation(s)
- Dilara Goksu Tamay
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
| | - Tugba Dursun Usal
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
| | - Ayse Selcen Alagoz
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
| | - Deniz Yucel
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Histology and Embryology, School of Medicine, Acıbadem Mehmet Ali Aydinlar University, Istanbul, Turkey
| | - Nesrin Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biomedical Engineering, Middle East Technical University, Ankara, Turkey
- Department of Chemistry, Middle East Technical University, Ankara, Turkey
| | - Vasif Hasirci
- BIOMATEN, Center of Excellence in Biomaterials and Tissue Engineering, Middle East Technical University, Ankara, Turkey
- Department of Biotechnology, Middle East Technical University, Ankara, Turkey
- Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
- Department of Medical Engineering, School of Engineering, Acıbadem Mehmet Ali Aydinlar University, Istanbul, Turkey
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142
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Mobaraki M, Abbasi R, Omidian Vandchali S, Ghaffari M, Moztarzadeh F, Mozafari M. Corneal Repair and Regeneration: Current Concepts and Future Directions. Front Bioeng Biotechnol 2019; 7:135. [PMID: 31245365 PMCID: PMC6579817 DOI: 10.3389/fbioe.2019.00135] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Accepted: 05/20/2019] [Indexed: 12/13/2022] Open
Abstract
The cornea is a unique tissue and the most powerful focusing element of the eye, known as a window to the eye. Infectious or non-infectious diseases might cause severe visual impairments that need medical intervention to restore patients' vision. The most prominent characteristics of the cornea are its mechanical strength and transparency, which are indeed the most important criteria considerations when reconstructing the injured cornea. Corneal strength comes from about 200 collagen lamellae which criss-cross the cornea in different directions and comprise nearly 90% of the thickness of the cornea. Regarding corneal transparency, the specific characteristics of the cornea include its immune and angiogenic privilege besides its limbus zone. On the other hand, angiogenic privilege involves several active cascades in which anti-angiogenic factors are produced to compensate for the enhanced production of proangiogenic factors after wound healing. Limbus of the cornea forms a border between the corneal and conjunctival epithelium, and its limbal stem cells (LSCs) are essential in maintenance and repair of the adult cornea through its support of corneal epithelial tissue repair and regeneration. As a result, the main factors which threaten the corneal clarity are inflammatory reactions, neovascularization, and limbal deficiency. In fact, the influx of inflammatory cells causes scar formation and destruction of the limbus zone. Current studies about wound healing treatment focus on corneal characteristics such as the immune response, angiogenesis, and cell signaling. In this review, studied topics related to wound healing and new approaches in cornea regeneration, which are mostly related to the criteria mentioned above, will be discussed.
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Affiliation(s)
- Mohammadmahdi Mobaraki
- Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Reza Abbasi
- Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Sajjad Omidian Vandchali
- Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Maryam Ghaffari
- Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Fathollah Moztarzadeh
- Biomaterials Group, Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
| | - Masoud Mozafari
- Department of Tissue Engineering and Regenerative Medicine, Faculty of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
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143
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Blaeser A, Heilshorn SC, Duarte Campos DF. Smart Bioinks as de novo Building Blocks to Bioengineer Living Tissues. Gels 2019; 5:E29. [PMID: 31121889 PMCID: PMC6630496 DOI: 10.3390/gels5020029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 02/06/2023] Open
Abstract
In vitro tissues and 3D in vitro models have come of age [...].
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Affiliation(s)
- Andreas Blaeser
- Medical Textiles and Biofabrication, RWTH Aachen University, 52074 Aachen, Germany.
| | - Sarah C Heilshorn
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Daniela F Duarte Campos
- Department of Materials Science & Engineering, Stanford University, Stanford, CA 94305, USA.
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144
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Fernández-Pérez J, Ahearne M. Decellularization and recellularization of cornea: Progress towards a donor alternative. Methods 2019; 171:86-96. [PMID: 31128238 DOI: 10.1016/j.ymeth.2019.05.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 12/20/2022] Open
Abstract
The global shortage of donor corneas for transplantation has led to corneal bioengineering being investigated as a method to generate transplantable tissues. Decellularized corneas are among the most promising materials for engineering corneal tissue since they replicate the complex structure and composition of real corneas. Decellularization is a process that aims to remove cells from organs or tissues resulting in a cell-free scaffold consisting of the tissues extracellular matrix. Here different decellularization techniques are described, including physical, chemical and biological methods. Analytical techniques to confirm decellularization efficiency are also discussed. Different cell sources for the recellularization of the three layers of the cornea, recellularization methods used in the literature and techniques used to assess the outcome of the implantation of such scaffolds are examined. Studies involving the application of decellularized corneas in animal models and human clinical studies are discussed. Finally, challenges for this technology are explored involving scalability, automatization and regulatory affairs.
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Affiliation(s)
- Julia Fernández-Pérez
- Dept of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, University of Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Science Institute, Trinity College Dublin, University of Dublin, Ireland
| | - Mark Ahearne
- Dept of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, University of Dublin, Ireland; Trinity Centre for Biomedical Engineering, Trinity Biomedical Science Institute, Trinity College Dublin, University of Dublin, Ireland.
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145
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Kim H, Jang J, Park J, Lee KP, Lee S, Lee DM, Kim KH, Kim HK, Cho DW. Shear-induced alignment of collagen fibrils using 3D cell printing for corneal stroma tissue engineering. Biofabrication 2019; 11:035017. [PMID: 30995622 DOI: 10.1088/1758-5090/ab1a8b] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The microenvironments of tissues or organs are complex architectures comprised of structural proteins including collagen. Particularly, the cornea is organized in a lattice pattern of collagen fibrils which play a significant role in its transparency. This paper introduces a transparent bioengineered corneal structure for transplantation. The structure is fabricated by inducing shear stress to a corneal stroma-derived decellularized extracellular matrix bioink based on a 3D cell printing technique. The printed structure recapitulates the native macrostructure of the cornea with aligned collagen fibrils which results in the construction of a highly matured and transparent cornea stroma analog. The level of shear stress, controlled by the various size of the printing nozzle, manipulates the arrangement of the fibrillar structure. With proper parameter selection, the printed cornea exhibits high cellular alignment capability, indicating a tissue-specific structural organization of collagen fibrils. In addition, this structural regulation enhances critical cellular events in the assembly of collagen over time. Interestingly, the collagen fibrils that remodeled along with the printing path create a lattice pattern similar to the structure of native human cornea after 4 weeks in vivo. Taken together, these results establish the possibilities and versatility of fabricating aligned collagen fibrils; this represents significant advances in corneal tissue engineering.
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Affiliation(s)
- Hyeonji Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Pohang, Gyeongbuk, 37673, Republic of Korea
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Duarte Campos DF, Rohde M, Ross M, Anvari P, Blaeser A, Vogt M, Panfil C, Yam GH, Mehta JS, Fischer H, Walter P, Fuest M. Corneal bioprinting utilizing collagen‐based bioinks and primary human keratocytes. J Biomed Mater Res A 2019; 107:1945-1953. [DOI: 10.1002/jbm.a.36702] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/11/2019] [Accepted: 04/16/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Daniela F. Duarte Campos
- Department of Dental Materials and Biomaterials ResearchRWTH Aachen University Hospital Aachen Germany
| | - Malena Rohde
- Department of OphthalmologyRWTH Aachen University Hospital Aachen Germany
| | - Mitchell Ross
- Department of Dental Materials and Biomaterials ResearchRWTH Aachen University Hospital Aachen Germany
- Department of Chemical EngineeringMcMaster University Hamilton Canada
| | - Parham Anvari
- Department of Dental Materials and Biomaterials ResearchRWTH Aachen University Hospital Aachen Germany
| | - Andreas Blaeser
- Department of Dental Materials and Biomaterials ResearchRWTH Aachen University Hospital Aachen Germany
- Medical Textiles and Biofabrication, Institute for Textile Technology (ITA)RWTH Aachen University Aachen Germany
| | - Michael Vogt
- Interdisciplinary Center for Clinical Research IZKFRWTH Aachen University Hospital Aachen Germany
| | - Claudia Panfil
- Aachen Center for Technology Transfer in Ophthalmology (ACTO) Aachen Germany
| | - Gary Hin‐Fai Yam
- Tissue Engineering and Stem Cell GroupSingapore Eye Research Institute Singapore Singapore
| | - Jodhbir S. Mehta
- Tissue Engineering and Stem Cell GroupSingapore Eye Research Institute Singapore Singapore
- Singapore National Eye Centre Singapore Singapore
| | - Horst Fischer
- Department of Dental Materials and Biomaterials ResearchRWTH Aachen University Hospital Aachen Germany
| | - Peter Walter
- Department of OphthalmologyRWTH Aachen University Hospital Aachen Germany
| | - Matthias Fuest
- Department of OphthalmologyRWTH Aachen University Hospital Aachen Germany
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147
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Kumar SA, Delgado M, Mendez VE, Joddar B. Applications of stem cells and bioprinting for potential treatment of diabetes. World J Stem Cells 2019; 11:13-32. [PMID: 30705712 PMCID: PMC6354103 DOI: 10.4252/wjsc.v11.i1.13] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/26/2018] [Accepted: 01/05/2019] [Indexed: 02/06/2023] Open
Abstract
Currently, there does not exist a strategy that can reduce diabetes and scientists are working towards a cure and innovative approaches by employing stem cell-based therapies. On the other hand, bioprinting technology is a novel therapeutic approach that aims to replace the diseased or lost β-cells, insulin-secreting cells in the pancreas, which can potentially regenerate damaged organs such as the pancreas. Stem cells have the ability to differentiate into various cell lines including insulin-producing cells. However, there are still barriers that hamper the successful differentiation of stem cells into β-cells. In this review, we focus on the potential applications of stem cell research and bioprinting that may be targeted towards replacing the β-cells in the pancreas and may offer approaches towards treatment of diabetes. This review emphasizes on the applicability of employing both stem cells and other cells in 3D bioprinting to generate substitutes for diseased β-cells and recover lost pancreatic functions. The article then proceeds to discuss the overall research done in the field of stem cell-based bioprinting and provides future directions for improving the same for potential applications in diabetic research.
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Affiliation(s)
- Shweta Anil Kumar
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, United States
| | - Monica Delgado
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, United States
| | - Victor E Mendez
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, United States
| | - Binata Joddar
- Inspired Materials and Stem-Cell Based Tissue Engineering Laboratory, Department of Metallurgical, Materials and Biomedical Engineering, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, United States
- Border Biomedical Research Center, University of Texas at El Paso, 500 W University Avenue, El Paso, TX 79968, United States.
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148
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Yazdanpanah G, Jabbehdari S, Djalilian AR. Emerging Approaches for Ocular Surface Regeneration. CURRENT OPHTHALMOLOGY REPORTS 2019; 7:1-10. [PMID: 31275736 DOI: 10.1007/s40135-019-00193-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Purpose of review In this manuscript, the recent advancements and novel approaches for regeneration of the ocular surface are summarized. Recent findings Following severe injuries, persistent inflammation can alter the rehabilitative capability of the ocular surface environment. Limbal stem cell deficiency (LSCD) is one of the most characterized ocular surface disorders mediated by deficiency and/or dysfunction of the limbal epithelial stem cells (LESCs) located in the limbal niche. Currently, the most advanced approach for revitalizing the ocular surface and limbal niche is based on transplantation of limbal tissues harboring LESCs. Emerging approaches have focused on restoring the ocular surface microenvironment using (1) cell-based therapies including cells with capabilities to support the LESCs and modulate the inflammation, e.g., mesenchymal stem cells (MSCs), (2) bio-active extracellular matrices from decellularized tissues, and/or purified/synthetic molecules to regenerate the microenvironment structure, and (3) soluble cytokine/growth factor cocktails to revive the signaling pathways. Summary Ocular surface/limbal environment revitalization provide promising approaches for regeneration of the ocular surface.
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Affiliation(s)
- Ghasem Yazdanpanah
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Sayena Jabbehdari
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Ali R Djalilian
- Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, Illinois, USA
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149
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Strategies for reconstructing the limbal stem cell niche. Ocul Surf 2019; 17:230-240. [PMID: 30633966 DOI: 10.1016/j.jtos.2019.01.002] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 10/21/2018] [Accepted: 01/07/2019] [Indexed: 12/19/2022]
Abstract
The epithelial cell layer that covers the surface of the cornea provides a protective barrier while maintaining corneal transparency. The rapid and effective turnover of these epithelial cells depends, in part, on the limbal epithelial stem cells (LESCs) located in a specialized microenvironment known as the limbal niche. Many disorders affecting the regeneration of the corneal epithelium are related to deficiency and/or dysfunction of LESCs and the limbal niche. Current approaches for regenerating the corneal epithelium following significant injuries such as burns and inflammatory attacks are primarily aimed at repopulating the LESCs. This review summarizes and assesses the clinical feasibility and efficacy of current and emerging approaches for reconstruction of the limbal niche. In particular, the application of mesenchymal stem cells along with appropriate biological scaffolds appear to be promising strategies for long-term revitalization of the limbal niche.
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150
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Valot L, Martinez J, Mehdi A, Subra G. Chemical insights into bioinks for 3D printing. Chem Soc Rev 2019; 48:4049-4086. [DOI: 10.1039/c7cs00718c] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Dedicated chemical strategies are required to form hydrogel networks from bioink components, allowing cell survival during 3D bioprinting processes.
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